CN105934860B - Method for running onboard power system - Google Patents
Method for running onboard power system Download PDFInfo
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- CN105934860B CN105934860B CN201580005801.XA CN201580005801A CN105934860B CN 105934860 B CN105934860 B CN 105934860B CN 201580005801 A CN201580005801 A CN 201580005801A CN 105934860 B CN105934860 B CN 105934860B
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- 238000000034 method Methods 0.000 title claims abstract description 42
- 230000008878 coupling Effects 0.000 claims abstract description 42
- 238000010168 coupling process Methods 0.000 claims abstract description 42
- 238000005859 coupling reaction Methods 0.000 claims abstract description 42
- 238000000926 separation method Methods 0.000 claims abstract description 9
- 238000002485 combustion reaction Methods 0.000 claims description 11
- 238000009434 installation Methods 0.000 claims description 5
- 239000007858 starting material Substances 0.000 abstract description 17
- 230000005611 electricity Effects 0.000 description 15
- 230000008569 process Effects 0.000 description 15
- 238000003860 storage Methods 0.000 description 12
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 7
- 229910001416 lithium ion Inorganic materials 0.000 description 7
- 239000003990 capacitor Substances 0.000 description 6
- 238000004590 computer program Methods 0.000 description 5
- 238000011068 loading method Methods 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 230000004907 flux Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000000872 buffer Substances 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000007853 buffer solution Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000003862 health status Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/08—Three-wire systems; Systems having more than three wires
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
- B60R16/033—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for characterised by the use of electrical cells or batteries
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/08—Three-wire systems; Systems having more than three wires
- H02J1/082—Plural DC voltage, e.g. DC supply voltage with at least two different DC voltage levels
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/40—The network being an on-board power network, i.e. within a vehicle
- H02J2310/46—The network being an on-board power network, i.e. within a vehicle for ICE-powered road vehicles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0024—Parallel/serial switching of connection of batteries to charge or load circuit
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Secondary Cells (AREA)
Abstract
The present invention relates to the methods for running onboard power system, onboard power system has the sub- power grid of low-voltage, the sub- power grid of high voltage and starter generator, the coupled unit of the sub- power grid of high voltage is connect with the sub- power grid of low-voltage, coupling unit takes energy from the sub- power grid of high voltage and is delivered to the sub- power grid of low-voltage, the sub- power grid of high voltage has battery, it generates high voltage and exports the secondary battery unit to the sub- power grid of high voltage and at least two with univoltage tap, univoltage tap is guided to coupling unit, secondary battery unit is selectively switched to the sub- power grid of low-voltage by coupling unit, it wherein realizes in following steps from having been turned on to the first secondary battery unit of the sub- power grid of low-voltage to the switching of the second secondary battery unit of the sub- power grid of low-voltage to be switched to: the conducting wire between the first and second secondary battery units of separation；Second secondary battery unit is switched to the sub- power grid of low-voltage；The first secondary battery unit is cut off from the sub- power grid of low-voltage；Connect the conducting wire between the first and second secondary battery units.
Description
Technical field
The present invention relates to a kind of methods for running the onboard power system of motor vehicle.
In addition, being arranged for carrying out the party the present invention relates to a kind of battery management system and a kind of computer program
Method, and it is related to a kind of onboard power system and a kind of motor vehicle, this method can be implemented on it.
Background technique
In the motor vehicle with internal combustion engine, in order to be self-starter or starter for internal combustion engine and motor-driven
The other electric installation of vehicle powers and onboard power system is arranged, and is run according to standard with 12 volts.In the process for starting internal combustion engine
In, voltage is provided for starter via onboard power system by starter battery, when for example connecting by corresponding start signal
When dynamic device, which starts internal combustion engine.If the engine starting, driven generator, the generator then generates about 12
Volt voltage and the different electric loadings in vehicle are provided to via onboard power system.The generator is to pass through starting again herein
The starter battery charging of process load.If actual voltage can be specified via onboard power system charging accumulator
Voltage, such as 14V or 14.4V.Onboard power system with 12V or 14V voltage is also referred to as low electricity within the scope of the invention
Press onboard power system.
The known other onboard power system that the voltage rating with 48V is used in electronic and hybrid vehicle,
High voltage onboard power system is also referred to as in the scope of the present invention.
Summary of the invention
It is related to a kind of onboard power system for motor vehicle according to the method for the present invention, is used for wherein the onboard power system has
The sub- power grid of low-voltage of at least one low-voltage load, the sub- power grid of high voltage for the load of at least one high voltage and starting
Device-generator, wherein the sub- power grid of high voltage is connected via coupling unit with the sub- power grid of the low-voltage, the coupling
Unit is arranged to take out energy from the sub- power grid of the high voltage and is delivered to the sub- power grid of the low-voltage, wherein the height
The sub- power grid of voltage has battery, and the battery is arranged to generate high voltage and export to the sub- power grid of the high voltage,
And the battery has at least two secondary battery units for having univoltage tap, and the univoltage tap is guided to described
Coupling unit, wherein the coupling unit is arranged to, and the secondary battery unit (41) is selectively switched to the low electricity
Press sub- power grid (21).It realized in following steps first, had been turned on to the secondary battery unit of the sub- power grid of the low-voltage and
Two, the switching between the secondary battery unit wait be switched to the sub- power grid of the low-voltage:
A) conducting wire between secondary battery unit and second, secondary battery unit to be connected separate first, having been turned on；
B) described second, secondary battery unit to be connected is switched to the sub- power grid of the low-voltage；
C) secondary battery unit for cutting off described first from the sub- power grid of the low-voltage, having been turned on；
D) be connected to first, the secondary battery unit that is cut off from the sub- power grid of the low-voltage and second, have been turned on to described
Conducting wire between the secondary battery unit of the sub- power grid of low-voltage.
The present invention has the advantage that, can run electric loading by the sub- power grid of the low-voltage, is arranged on low
On one voltage, and the sub- power grid power supply high power load of high voltage, that is, there is the sub- vehicle relative to the higher voltage of first voltage
Carry power grid.The power supply of the sub- power grid of low-voltage is Chong Die with the charging and discharging process in the sub- power grid of high voltage.Via high voltage
The sub- power grid power supply of the low-voltage of power grid uniaxially carries out herein, i.e., coupling unit provides energy preferably only in one direction
Conversion.
This method provides an advantageous switched design, allow to carry out the power supply of the sub- power grid of low-voltage un-interrupted,
It is also powered i.e. in handoff procedure by least one secondary battery unit for the sub- power grid of low-voltage.As a result, in the sub- power grid of low-voltage
Voltage interruption can be avoided by without additional buffer system.During the switching process, battery is also the sub- power grid of high voltage
As memory for using.Energy stream here, voltage can be lower than rated value in short time, however in two directions, i.e.
The charging and discharging of battery are possible.
Concept " battery " and " secondary battery unit " hereinbefore, be used for energy storage pool or storage with meeting common speech habits
It can pool unit.Battery includes one or more secondary battery units, can indicate battery list pond, battery module, module
Route or battery packet.Those battery list ponds preferably spatially combine herein and are connected to each other on circuit engineering,
Such as module is connected in series or in parallel into.Multiple modules are capable of forming the direct converter (BDC:battery of so-called battery
Direct converter), and the direct converter of multiple batteries be capable of forming the direct inverter of battery (BDI:
battery direct inverter)。
Being advantageously improved and optimizing to pass through for the method provided in the dependent claims refers in the dependent claims
Scheme be feasible.
Therefore, it when the secondary battery unit optionally switched is arranged for providing low-voltage respectively, is advantageous.
The secondary battery unit therefore can should be alternately needed, provides low-voltage, such as support start stop system, this will lead to battery
The service life of the raising of unit.
According to a preferred embodiment, the coupling unit has the switch reversely ended.Advantageously, this reversed section
Switch only is suitable for use in being switched on and off for the secondary battery unit of the alternative switching of the sub- power grid of low-voltage.The switch has
Following characteristic, makes it possible electric current flowing only in one direction under state " on ", and under state "off"
Two kinds of polarity it can absorb blanking voltage.
In step b) described second, the connection of secondary battery unit to be connected during preferably operate at least one
A switch reversely ended, especially preferably two switches reversely ended.In step c) described first, have been turned on
At least one switch reversely ended, especially preferably two are Preferably also operated during the switching of secondary battery unit
The switch reversely ended.
According to a preferred embodiment, the coupling unit has the switch of positive cut-off.Advantageously, which cuts
Switch only is suitable for the series connection of the secondary battery unit of alternative switching.Be preferably set up, in step a) described
The first, at least one is operated during the separation of conducting wire having been turned on and described second, between secondary battery unit to be connected
The switch of a positive cut-off.Preferably also it is arranged, the secondary battery unit that is cut off first, from the sub- power grid of low-voltage and the
Two, at least one is being operated just during having been turned on the connection to the conducting wire between the secondary battery unit of the sub- power grid of the low-voltage
To the switch of cut-off.
It is described first, the secondary battery unit having been turned on and described second, to be connected according to a preferred embodiment
Secondary battery unit described second, secondary battery unit to be connected being switched to after the sub- power grid of the low-voltage in step b)
And before the secondary battery unit for cutting off described first from the sub- power grid of the low-voltage, having been turned in step c), about institute
The sub- power grid of low-voltage is stated to be connected in parallel.Thus this is that by, i.e. the charging deviated significantly from two secondary battery units
Under state, the power supply to the sub- power grid of low-voltage by such secondary battery unit is realized, the secondary battery unit is with higher to be filled
Electricity condition provides higher voltage.Under the same or similar charged state of secondary battery unit, low-voltage son electricity
Net is powered by two secondary battery units.
It is described first, the secondary battery unit having been turned on and described second, to be connected according to a preferred embodiment
Secondary battery unit or the described first, secondary battery unit that has been turned off and the second, secondary battery unit that has been turned on, in-between
In the case where connecting wire, about the sub- line series connection of the high voltage.It is particularly favourable that the first and second battery lists
Member in-between in the case where connecting wire, connects and adjacent about the sub- line series of the high voltage.If it is required that not
Switching on the secondary battery unit of direct neighbor, then multiple handoff procedures execute in succession under short sequence, so that cutting each
Comprising adjacent secondary battery unit during changing.
It is furthermore possible to be arranged, the sub- power grid of the low-voltage has at least one capacitor.The capacitor is preferably arranged use
In the further stable low-voltage in the alternation procedure for the secondary battery unit having been turned on.The size of the capacitor is herein preferably
According to
It is selected, wherein ImaxIt, should be during the switching process in low-voltage son electricity for maximum onboard power supply current
It is flowed in net, tumschaltFor the duration, the secondary battery unit for power supply, and Δ U are not provided therebetweenmaxTo switch
The maximum allowable variation of onboard power system voltage during process.In addition, the capacitor also preferably is suitable as energy stores
Device is arranged to, and at least generates low-voltage in short time and exports to the sub- power grid of low-voltage.
It is carried out when switching in such time point, wherein onboard power supply current is as small as possible, then in the sub- power grid of low-voltage
In voltage interruption can advantageously further reduce.This for example can by the analysis of the signal for onboard power supply current and
The control of switch depending on this coupling unit is realized.Furthermore it is possible to synchronization is realized by load management system, with
In short time, high power load, such as heating system are cut off impairedly without comfort, so that the voltage interruption without rated value
The handoff procedure of secondary battery unit is possibly realized.
It is proposed according to the present invention to a kind of computer program, when implementing the calculating on programmable computer installation
When machine program, method described herein is executed according to it.The computer program for example can be for for realizing vehicle-mounted for running
The module of the module of the device of power grid or the battery management system for realizing vehicle.The computer program can be stored in
On machine readable storage medium, such as on permanent perhaps re-writable storage medium or computer installation classification
In, such as in portable memory, in such as CD-ROM, DVD, Blu-ray disc, USB storage or storage card.Additionally and
Alternatively, the computer program can in the computer installation on such as server or cloud-server for downloading, such as via
Data power grid such as internet or the communication connection such as telephone wire or wireless connection.
According to the present invention, a kind of battery management system (BMS) is furthermore provided, with device, with described for executing
The method for running onboard power system.In particular, which has unit, is arranged to so control
The coupling unit, so that the secondary battery unit is switched to the sub- power grid of low-voltage or cuts off from the sub- power grid of low-voltage.
A kind of onboard power system is given according to the present invention, is able to carry out described method on it, wherein coupling is single
Member is arranged to, by secondary battery unit about the sub- line series of high voltage and about the sub- power grid of low-voltage coupling each other in parallel
It closes.
The onboard power system can be in the static application of such as wind power plant, or in such as hybrid power and electricity
It comes into operation in the vehicle of motor-car.In particular, which uses in the vehicle with start stop system.
Particularly suitable for using in the car, which has system, i.e. onboard power system and the battery management system proposed
There are 48 volts of generators and 14 volts of starters, wherein 14 volts of starters are preferably provided for start stop system.
Provided system has so-called motive force recovery system particularly suitable for application in the car, the vehicle
(BRS).In motive force recovery system (BRS), electric flux is run in brake, in descending or sliding
(Segelbetieb) it is obtained in, to be thus that electric loading is powered.The BRS improves system effectiveness, make it possible to save fuel or
Person reduces discharge.Battery in the sub- power grid of high voltage had both supported the interior combustion gas of referred to as so-called boost motor, had also been used for
Even for electricity traveling, such as driving into parking stall and be driven out in parking stall in electricity in the low velocity of short distance.
A kind of motor vehicle given according to the present invention, with internal combustion engine and onboard power system described above.
Advantage of the invention
The present invention provides a kind of cheap onboard power system with the lithium-ions battery system for vehicle,
With the sub- power grid of high voltage, the sub- power grid of low-voltage and with the unidirectional of the sub- power grid of low-voltage for example with 48 volts of generators
Power supply motive force recovery system.Here, the DC/DC converter of potential separation can be cancelled relative to known system, with
And lead-acid accumulator.In addition, not needing independent starter in the sub- power grid of low-voltage.The motive force recovery system can close
Significantly more energy is saved in developing BRS system relative to current under suitable design, and thus in longer brake
More electric fluxs are recycled in vehicle process or descending in systems.
Above-mentioned invention according to the present invention includes operation reserve, make the power supply to the sub- power grid of low-voltage without
It interrupts.
Detailed description of the invention
It is shown in the accompanying drawings and multiple embodiments of the invention is discussed further below.In attached drawing,
Fig. 1 shows the sub- power grid of low-voltage according to prior art；
Fig. 2 shows with the sub- power grid of high voltage, the sub- power grid of low-voltage and unidirectional, potential separation DC/DC converter
Onboard power system；
Fig. 3 shows the DC/DC converter with the sub- power grid of high voltage, the sub- power grid of low-voltage and two-way potential separation
Onboard power system；
Fig. 4 is shown with the sub- power grid of high voltage, the sub- power grid of low-voltage and unidirectional, the unseparated DC/DC conversion of electric current
The onboard power system of device；
Fig. 5 shows coupling unit；
Fig. 6 shows the coupling unit under illustrative operating status in Fig. 5；And
Fig. 7 shows the switch of reversed and positive cut-off.
Specific embodiment
Fig. 1 shows onboard power system 1 according to prior art.During starting internal combustion engine, by starter battery
10 provide voltage to starter 11 via onboard power system 1, when for example connecting switch 12 by corresponding start signal, the starting
Device starts internal combustion engine (not shown).If engine starting, driven generator 13, the generator then generates about 12 volts
Voltage and the different electric loadings 14 in vehicle are supplied to via onboard power system 1.Generator 13 is to pass through starting again herein
The loaded starter battery 10 of process charges.
Fig. 2 shows turn with the sub- power grid 20 of high voltage, the sub- power grid 21 of low-voltage and unidirectional, potential separation DC/DC
The onboard power system 1 of parallel operation 22, the coupling unit being formed between the sub- power grid 20 of high voltage and the sub- power grid 21 of low-voltage.The vehicle
Carry the onboard power system that power grid 1 can be vehicle, especially motor vehicle, transport vehicle or fork truck.
The sub- power grid 20 of the high voltage is, for example, 48 volts of onboard power systems with generator 23, and the generator is by internal combustion engine
(not shown) driving.The generator 23 is constructed in this embodiment, according to the rotary motion amount of producing electricl energy of the motor of vehicle
And in the sub- power grid 20 of feed-in high voltage.The sub- power grid 20 of the high voltage further includes battery 24, such as can be configured as
Lithium-ions battery and its be arranged to, the working voltage of needs is exported to the sub- power grid 20 of high voltage.In high voltage electricity
Other load resistance 25 is disposed in net 20, such as can be born by least one, preferably by the electricity of multiple motor vehicles
It carries and is formed, driven by high voltage.
There are starter 26 in the sub- power grid 21 of low-voltage, the defeated of DC/DC converter 22 is arranged in the sub- power grid of the low-voltage
Outlet, the starter 26 are arranged to connect switch 27 to start internal combustion engine and energy accumulator 28, are arranged to, are
The sub- power grid 21 of low-voltage provides the voltage rating of 12V size.Other load 29 is disposed in the sub- power grid 21 of low-voltage, is passed through
Low-voltage is driven.Energy accumulator 28 for example including multiple electric current lists pond, for example such lead-acid accumulator, complete
(charged state, SOC=100%) is usually with 12.8 volts of voltage under charged state.In battery (the charging shape of electric discharge
State, SOC=0%) in, energy accumulator 28 has usually 10.8 volts of terminal voltage non-loadedly.In low-voltage son electricity
Onboard power system voltage in net 21 is in running, respectively according to the temperature of energy accumulator 28 and charged state about 10.8
In range between volt and 15 volts.
The DC/DC converter 22 is connected in input side and the sub- power grid 20 of high voltage and with generator 23.The DC/DC
Converter 22 is connected in outlet side with the sub- power grid 21 of low-voltage.The DC/DC converter 22 is configured to, and reception is flanked in input
DC voltages receiving, such as driving sub- power grid of high voltage, for example between 12 and 48 volts, and output voltage is generated,
Received voltage of institute is different from input side for it, especially generate less than input side received voltage output voltage, such as
12V or 14V.
Fig. 3 shows the onboard power system 1 with the sub- power grid 20 of high voltage and the sub- power grid 21 of low-voltage, by it is two-way,
The DC/DC converter 31 of potential separation is connected.Shown onboard power system 1 onboard power system substantially as shown in Figure 2
Ground construction, wherein generator accesses the sub- power grid of high voltage and in order to which the energy transmission between sub- onboard power system 20,21 uses
DC/DC converter 31 is implemented as potential separation.Battery 24,28 is also arranged in two sub- onboard power systems 20,21
It is such as described referring to fig. 2 with load 25,29.The difference for the system being shown in FIG. 3 essentially consists of the access side of starter
Formula.In system shown in figure 2, starter 26 is placed in the sub- power grid 21 of low-voltage and thus 22 energy of DC/DC converter
Uniaxially it is arranged in the sub- power grid 21 of low-voltage for the energy transmission of enough power grids 20 sub- for high voltage, and shown in Fig. 3
Its in the structure of starter-generator 30 is placed into the sub- power grid 20 of high voltage.In this case, 31 quilt of DC/DC converter
Be embodied as it is two-way, so that lithium-ions battery 24 (if necessary) can be electrically charged via the sub- power grid 21 of low-voltage.The low electricity
The starting delayed unloading, which aids in, to be realized via low voltage interface and DC/DC converter 31.
Fig. 4 shows the onboard power system 1 with the sub- power grid 20 of high voltage and the sub- power grid 21 of low-voltage, such as vehicle, especially
It is the onboard power system 1 of motor vehicle, transport vehicle or fork truck.The onboard power system 1 is particularly suited for having 48 volts of generators, 14 volts
It is used in special starter and the vehicle of motive force recovery system.
The sub- power grid 20 of the high voltage includes starter-generator 30, can start internal combustion engine (not shown) and by it
It is drivable.Starter-the generator 30 is configured to, according to the rotary motion of the motor of vehicle come the amount of producing electricl energy and
In the sub- power grid 20 of feed-in high voltage.Other load resistance 25 is disposed in the sub- power grid 20 of high voltage, such as can be by extremely
Few one, preferably formed by the electric loading of multiple motor vehicles, driven by high voltage.
The sub- power grid 20 of the high voltage furthermore include battery 40, such as can be configured as lithium-ions battery and
It is arranged to, and 48 volts of working voltage is exported to the sub- power grid of high voltage.The volume of the lithium-ions battery 40 at 48 volts
Preferably with the minimum capacity of about 15 Ah under constant voltage, required electric flux can be stored.
Battery 40 has multiple secondary battery unit 41-1,41-2 ... 41-n, and plurality of secondary battery unit 41 is attached
It in multiple battery lists pond, usually connects and is partly extraly connected in parallel with each other, to reach institute by battery 40
The power and energy datum needed.Single battery list pond for example, has the lithium ion electric power storage of 2.8 to 4.2 volts of voltage range
Pond.
Secondary battery unit 41-1,41-2 ... 41-n are associated with univoltage tap 80-11,80-12,80-21,80-
22 ... 80-n1,80-n2 convey the voltage of coupling unit 33 by it.The coupling unit 33 has following task, by electric power storage
At least one secondary battery unit 41 in pond 40 is switched to for its operation or the sub- power grid 21 of low-voltage supported.
The sub- power grid 20 of high voltage and the sub- power grid 21 of low-voltage are coupled by coupling unit 33, and are low electricity in its output end
Sub- power grid 21 is pressed to provide required working voltage, such as 12V or 14V.The structure and function of the coupling unit 33 will be referring to Fig. 5
It is described with 6.
The sub- power grid 21 of low-voltage includes low-voltage load 29, such as is set with the operation of 14V voltage.Implemented according to one
Mode is arranged, and lithium-ions battery 40 undertakes the power supply of quiescent current load in the vehicle of shutdown, and quiescent current load is made
It is shown for load 25,29.Such as can be arranged, meet the requirement of so-called airport test herein, wherein in the parking in six weeks
The vehicle is still and can start after time, and wherein the quiescent current of low-voltage load 29 is mentioned during down time
It is supplied to the sub- power grid 21 of low-voltage, thus for example, burglar alarm device is powered.
High power memory 28 or buffer storage are optionally disposed in the sub- power grid 21 of low-voltage, it being capable of the short time
Ground provides very high power, that is, is optimized to high power.The high power memory 28 meets the purpose, i.e., in secondary battery unit 41
Handoff procedure in further avoid over-voltage.If capacitor is used as high power memory 28, size is preferably:
Wherein ImaxFor maximum onboard power supply current, should be flowed in onboard power system during the switching process,
tumschaltFor the duration, the secondary battery unit for power supply, and Δ U are not provided therebetweenmaxFor during the switching process
The maximum allowable variation of onboard power system voltage.
The onboard power system being shown in FIG. 4 can further comprise battery management system (BMS) (not shown).The storage
Battery management system includes controller, is set as obtaining, handle about the temperature of battery 40 or secondary battery unit 41, institute
The measurement data of the voltage of offer, the electric current of offer and charged state, and the health status of battery 40 is predicted accordingly.The storage
Battery management system includes unit herein, is arranged to so adjust coupling unit 33, so as to will selectively store
Battery unit 41 accesses in the sub- power grid 21 of low-voltage.
Fig. 5 shows coupling unit 33, is implemented as the unidirectional, unseparated dc voltage changer (DC/ of electric current
DC converter).The coupling unit 33 includes the switch 44,45 reversely ended, with following characteristic, under state " on "
Make it possible electric current flowing only in one direction, and can absorb cut-off to two kinds of polarity under the second state "off"
Voltage.It is different in essence with the simple semiconductor switch such as IGBT switch, because it is in backward direction due to inside it
Diode be unable to absorb blanking voltage.Two different switchtypes are shown in Fig. 5 according to direction of current flow, i.e.,
RSS_I 45 and RSS_r 44, the two are not different in its process aspect, but are only constructed with different polarity.Reversely end
The example of the further structure of switch 44,45 is described referring to Fig. 7.
In coupling unit 33, single tap 80 of secondary battery unit 41 is delivered to different reversed cut-off switch RSS_ respectively
One in I 45 and RSS_r 44.The reversed cut-off switch RSS_I 45 connects in the outlet side and anode 52 of coupling unit 33
Line, and reversely end switch RSS_r 44 and link to cathode 51 in the outlet side of coupling unit 33.
The coupling unit 33 includes the switch 90 of positive cut-off, such as can be switched for standard semiconductor.Forward direction cut-off
The example of further structure of switch 90 be described referring to Fig. 7.In coupling unit 33, single tap of secondary battery unit 41
80 diverge and are parallel to the switch VSS 90 that the switch reversely ended is delivered to positive cut-off respectively.If the switch 90 is connect
Logical, secondary battery unit 41 is connected in parallel with each other by the switch VSS 90 of forward direction cut-off.Here, in every two secondary battery unit 41
Between the positive cut-off of placement switch 90, so that the switch VSS that n-1 forward direction is ended be arranged in n secondary battery unit 41
90-1、VSS 90-2、…… VSS 90-n-1。
The voltage position of the sub- power grid 20 of the high voltage depends on one or more electric power storages referring to the ground connection of the sub- power grid 21 of low-voltage
Pool unit 41 is switched to where.Not under operation, one in potential however there is amount, with high voltage and low-voltage
The size of summation is more than voltage limit, i.e., the 48 volts of power grids and 14 volts of power grids the case where with 62 volts.However can also it go out
The now negative potential relative to the ground connection of the sub- power grid of low-voltage.
The operation of starter-generator 30 depends on the operation of coupling unit 33 and the power supply of the sub- power grid of low-voltage.It is connecing
It is obtained in logical secondary battery unit 41 through the sub- power grid of low-voltage and is presented by (in the case where if necessary) starter-generator 30
The electric discharge electricity for entering the charging current (generator operation) in entire battery 40 or being taken out from entire battery 40 by it
It flows (motor running), the secondary battery unit power supply sub- power grid 21 of low-voltage.As long as being no more than the boundary of the permission of secondary battery unit
It limits, the maximum allowable discharge current in for example single pond, then can observe the process independently of one another.Due at least one battery
Unit 41 connects coupling unit 33, therefore the sub- power grid of the low-voltage of reliably powering via the switch 44,45,90 always
21.Due to the power supply of the multiple redundancy of the sub- power grid 21 of low-voltage, system can be constructed with the structure proposed, had in low electricity
Press the very high availability of the electric flux in sub- power grid.
Fig. 6 shows low-voltage sub- power grid 21 such as reversely the ending via access by secondary battery unit 41-1,41-2
The switch VSS 90- of switch RSS_I 45-i, RSS_I 45-j, RSS_r 44-i, RSS_r 44-j and the positive cut-off of disconnection
1 power supply, between secondary battery unit 44-1,44-2.By anode 52 via switch RSS_I 45-i, the warp reversely ended
The first current path 71 is guided by the first secondary battery unit 41-1 and via the other switch RSS_r 44-j reversely ended
To cathode 51.Furthermore by anode 52 via switch RSS_I 45-j reversely ended, via the second secondary battery unit 41-2 and
Guide the second current path 72 to cathode 51 via the other switch RSS_r 44-i reversely ended.Since switch 90-1 is
It disconnects, the first secondary battery unit 41-1 and the second secondary battery unit 41-2 are connected in parallel about the sub- power grid of low-voltage.First stores
The anode of battery unit 41-1 be electric high resistant connect.
For the power supply without interruption of the sub- power grid 21 of low-voltage, the invention proposes a kind of switching methods, wherein in step
A) in, by means of the switch VSS 90-1 disconnection of the positive cut-off disposed in conducting wire first, the secondary battery unit that has been turned on
(being herein, for example, secondary battery unit 41-1) (is, for example, secondary battery unit 41- with second, secondary battery unit to be connected herein
2) conducting wire between.After step a), battery 40 has 36 volts of total voltage, for the sub- power grid 20 of high electric voltage, so that
Two-way energy stream is provided for the sub- power grid 20 of high voltage.Other secondary battery unit 41-2 ... 41-n forms n-1 storage herein
The series circuit of battery unit.
In second step b) then, by delay, time period be substantially dependent on used in switch 44,45,
90 characteristic, second, secondary battery unit 41-2 to be connected be switched to the sub- power grid 21 of low-voltage.Fig. 6 is shown after step b)
State, two of them secondary battery unit 41-2 and 41-1 are connected in parallel.
Delay between being switched off and on is necessary because otherwise during the transition stage of all switching processes
Voltage in the sub- power grid 21 of low-voltage is increased to the high value not allowed, wherein the case where being shown in FIG. 6 is improved to son
The summation of the voltage of battery 41-1 and 41-2 is improved to twice.When the coupling device 33 is connected with delay time, this however
It indicates, the power supply of the sub- power grid 21 of low-voltage is interrupted in short time.It, can be according to some in order to avoid the voltage interruption not allowed
Embodiment is implemented to buffer by means of capacitor 28, as referring to described in Fig. 4.
In third step c), if the switching for the secondary battery unit 41 that setting has been connected from the sub- power grid 21 of low-voltage, the
One, the secondary battery unit 41-1 having been turned on is cut off from the sub- power grid 21 of low-voltage.In four steps d), via forward direction cut-off
Switch VSS 90-1 establishes the secondary battery unit 41-1 and second cut off first, from the sub- power grid 21 of low-voltage again, has connect
Pass to the conducting wire connection between the secondary battery unit 41-2 of the sub- power grid 21 of low-voltage.After establishing the connection again, terminate from the
The conversion of one to the second secondary battery unit, the power supply without interrupting the sub- power grid 21 of low-voltage.
It can be provided according to the other embodiment of this method, the switch of all positive cut-offs of cutting in step a)
90.In switch step, feed in energy analysis does not work starter-generator 30 into the sub- power grid of high voltage and in boosting operation.With
The switch 44,45 of shorter delayed backward cut-off connects one or more secondary battery units 41 to be connected, the delay
Period depend on used switch characteristic.Therefore, which also can be in the secondary battery unit 41 of not direct neighbor
Between carry out.
Fig. 7 shows the possible structure of the switch 90 of the switch 44,45 reversely ended and positive cut-off.Circulating direction exists
This is provided with I.The switch RSS_r 44 reversely ended for example including IGBT, MOSFET or bipolar junction transistor 101 and and its
The diode 103 of series connection.MOSFET 101 is shown in Fig. 7, and there is diode show together, internal
102.With being connected to the direction of the diode 102 of inside of the diode 103 in contrast to MOSFET101 of the MOSFET 101
Polarization.The switch RSS_r 44 reversely ended makes electric current flow through or end in a reverse direction on circulating direction I.This is reversed
The switch RSS_I 45 of cut-off corresponds to RSS_r 44, is only constructed with opposite polarity, thus circulation and the exchange of cut-off direction.
The switch 90 of forward direction cut-off includes MOSFET, IGBT or bipolar junction transistor 101, and wherein its internal diode 102 is by one
It rises and shows.Switch RSS_I 45, RSS_r 44 and VSS 90 are in particular also by hardly perceptible delay in switching process
Middle protrusion allows very short switching time section.By suitable control circuit, between being switched off and on of switch when
Between postpone to be regulated very precisely.
The aspect that the present invention is not restricted to embodiment described here and emphasizes herein.Passing through claim on the contrary
A variety of modifications within the scope of given be it is possible, in the process range of those skilled in the art.
Claims (9)
1. a kind of for running the method for being used for the onboard power system (1) of motor vehicle, wherein the onboard power system (1), which has, to be used for
At least one low-voltage loads the sub- power grid of low-voltage (21) of (29), high voltage at least one high voltage load (25)
Power grid (20) and starter-generator (30), wherein the sub- power grid of high voltage (20) via coupling unit (33) with it is described
The sub- power grid of low-voltage (21) is connected, the coupling unit be arranged to from the sub- power grid of the high voltage (20) extract energy and
It is delivered to the sub- power grid of the low-voltage (21), wherein the sub- power grid of high voltage (20) has battery (40), the battery
It is arranged to generate high voltage and exports to the sub- power grid of the high voltage (20), and the battery has at least two bands
There is the secondary battery unit (41) of univoltage tap (80), the univoltage tap is directed to the coupling unit (33), wherein
The coupling unit (33) is arranged to, and the secondary battery unit (41) is selectively switched to the sub- power grid of the low-voltage
(21), and wherein, the coupling unit (33) is implemented as unidirectional, the unseparated dc voltage changer of electric current, special
Sign is, realize in following steps from first, have been turned on to the sub- power grid of the low-voltage (21) secondary battery unit (41) extremely
The second, the switching wait be switched to the secondary battery unit (41) of the sub- power grid of the low-voltage (21):
A) conducting wire between second, secondary battery unit to be connected (41) separate first, having been turned on；
B) described second, secondary battery unit to be connected (41) is switched to the sub- power grid of the low-voltage (21)；
C) secondary battery unit (41) for cutting off described first from the sub- power grid of the low-voltage (21), having been turned on；
D) be connected to first, the secondary battery unit (41) that is cut off from the sub- power grid of the low-voltage (21) and second, have been turned on to
Conducting wire between the secondary battery unit (41) of the sub- power grid of low-voltage (21),
Wherein the coupling unit (33) has the switch (90) of positive cut-off, and in step a) described first,
At least one is being operated just during the separation of conducting wire connecting and described second, between secondary battery unit to be connected (41)
To the switch (90) of cut-off,
Wherein described first, the secondary battery unit (41) having been turned on is with described second, secondary battery unit to be connected (41) in step
It is rapid b) in described second, secondary battery unit to be connected (41) is switched to after the sub- power grid of the low-voltage and in step
C) before the secondary battery unit (41) for cutting off described first from the sub- power grid of the low-voltage (21), having been turned in, about described
The sub- power grid of low-voltage (21) is connected in parallel.
2. the method according to claim 1, wherein the secondary battery unit (41) is arranged for providing respectively
Low-voltage.
3. method according to claim 1 or 2, which is characterized in that the coupling unit (33) has that reversely ends to open
Close (44,45), and in step b) described second, the connection of secondary battery unit to be connected (41) during operate to
A few switch (44,45) reversely ended.
4. method according to claim 1 or 2, which is characterized in that the coupling unit (33) has that reversely ends to open
Close (44,45), and in step c) described first, the cutting of the secondary battery unit (41) having been turned on during operate to
A few switch (44,45) reversely ended.
5. method according to claim 1 or 2, which is characterized in that described first, the secondary battery unit having been turned on (41) and
Described second, secondary battery unit to be connected (41), in-between in the case where connecting wire, about the sub- power grid of the high voltage
(20) it is connected in series and adjacent.
6. a kind of battery management system has and is used for for executing the method according to any one of claims 1 to 5
Control the unit for connecting the coupling unit (33) of secondary battery unit (41).
7. a kind of computer-readable medium has program code, when the implementation described program generation on programmable computer installation
When code, said program code is arranged for executing the method according to any one of claims 1 to 5.
8. a kind of onboard power system (1), is able to carry out the method according to any one of claims 1 to 5 on it, wherein
Coupling unit (33) is arranged to, by secondary battery unit (41) about the sub- power grid of high voltage (20) in series and about low-voltage
Sub- power grid (21) is coupled to each other in parallel.
9. a kind of motor vehicle has internal combustion engine and onboard power system according to claim 8 (1).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102014201348.8A DE102014201348A1 (en) | 2014-01-27 | 2014-01-27 | Method for operating a vehicle electrical system |
| DE102014201348.8 | 2014-01-27 | ||
| PCT/EP2015/051362 WO2015110579A1 (en) | 2014-01-27 | 2015-01-23 | Method for operation of an onboard power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105934860A CN105934860A (en) | 2016-09-07 |
| CN105934860B true CN105934860B (en) | 2019-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580005801.XA Active CN105934860B (en) | 2014-01-27 | 2015-01-23 | Method for running onboard power system |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP6190077B2 (en) |
| KR (1) | KR101841559B1 (en) |
| CN (1) | CN105934860B (en) |
| DE (1) | DE102014201348A1 (en) |
| WO (1) | WO2015110579A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6196955B2 (en) | 2013-10-02 | 2017-09-13 | エア・ウォーター防災株式会社 | Fire extinguishing gas jetting apparatus and gas fire extinguishing apparatus provided with the same |
| JP6468138B2 (en) * | 2015-09-10 | 2019-02-13 | 株式会社デンソー | Power supply |
| JP6761172B2 (en) * | 2016-08-12 | 2020-09-23 | 株式会社今仙電機製作所 | Vehicle power supply |
| DE102016116972A1 (en) * | 2016-09-09 | 2018-03-15 | HELLA GmbH & Co. KGaA | Two-voltage battery and mounting method for this |
| JP6751512B2 (en) | 2016-12-08 | 2020-09-09 | 株式会社オートネットワーク技術研究所 | In-vehicle power supply |
| EP3627647B1 (en) * | 2018-09-18 | 2022-08-31 | KNORR-BREMSE Systeme für Nutzfahrzeuge GmbH | A system and a method for providing electric power |
| JP7518333B2 (en) | 2020-01-20 | 2024-07-18 | 株式会社今仙電機製作所 | Vehicle power supply device |
| JP2022073490A (en) * | 2020-11-02 | 2022-05-17 | 株式会社今仙電機製作所 | Power supply device for vehicle |
| DE102021101601A1 (en) | 2021-01-26 | 2022-07-28 | Audi Aktiengesellschaft | Electrical system for a motor vehicle and motor vehicle |
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| DE102012010711A1 (en) * | 2012-05-30 | 2013-03-28 | Daimler Ag | On-board power system for vehicle, has electrical energy storage device that is electrically connected with accumulator units according to total output voltage value corresponding to predetermined input voltage value |
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| DE102008002177A1 (en) * | 2008-06-03 | 2009-12-10 | Robert Bosch Gmbh | Partial electrical system for use in electrical system of modern motor vehicle, has switching devices controllable by controller in such way that switching position of capacitors is mutually exchangeable |
| DE102008037064A1 (en) * | 2008-08-08 | 2010-02-11 | Bayerische Motoren Werke Aktiengesellschaft | Circuit arrangement for an electric drive |
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2015
- 2015-01-23 WO PCT/EP2015/051362 patent/WO2015110579A1/en active Application Filing
- 2015-01-23 CN CN201580005801.XA patent/CN105934860B/en active Active
- 2015-01-23 JP JP2016565563A patent/JP6190077B2/en active Active
- 2015-01-23 KR KR1020167023683A patent/KR101841559B1/en active IP Right Grant
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| DE102012010711A1 (en) * | 2012-05-30 | 2013-03-28 | Daimler Ag | On-board power system for vehicle, has electrical energy storage device that is electrically connected with accumulator units according to total output voltage value corresponding to predetermined input voltage value |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2017506498A (en) | 2017-03-02 |
| KR101841559B1 (en) | 2018-03-23 |
| KR20160114677A (en) | 2016-10-05 |
| JP6190077B2 (en) | 2017-08-30 |
| DE102014201348A1 (en) | 2015-07-30 |
| CN105934860A (en) | 2016-09-07 |
| WO2015110579A1 (en) | 2015-07-30 |
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