CN109353233A - Power distribution circuit of the new-energy automobile with preliminary filling, electric discharge and voltage stabilizing function - Google Patents
Power distribution circuit of the new-energy automobile with preliminary filling, electric discharge and voltage stabilizing function Download PDFInfo
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- CN109353233A CN109353233A CN201811236961.7A CN201811236961A CN109353233A CN 109353233 A CN109353233 A CN 109353233A CN 201811236961 A CN201811236961 A CN 201811236961A CN 109353233 A CN109353233 A CN 109353233A
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- 230000000087 stabilizing effect Effects 0.000 title claims abstract description 6
- 239000003990 capacitor Substances 0.000 claims abstract description 26
- 239000000446 fuel Substances 0.000 claims abstract description 18
- 238000005070 sampling Methods 0.000 claims description 7
- 230000005611 electricity Effects 0.000 abstract description 13
- 230000006870 function Effects 0.000 abstract description 4
- 230000008859 change Effects 0.000 abstract description 2
- 230000005055 memory storage Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
-
- 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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a kind of power distribution circuit of new-energy automobile with preliminary filling, electric discharge and voltage stabilizing function, when to solve electricity under high pressure, still this problem of storing electricity in electric machine controller MCU and front end capacitor built in high-voltage system load, the present invention increases a discharge circuit on the basis of existing power supply allocation unit, to stop in vehicle, the electricity of the front end capacitor memory storage built in electric machine controller MCU and high-voltage system load is bled off when carrying out electrically operated under high pressure；When to solve fuel battery engine system starting and load rapid change, super capacitor SC and DC/DC are responded not in time, lead to this unstable problem of busbar voltage, the present invention is on the basis of existing power supply distributor circuit, two large bulk capacitances C1, C2 of parallel connection, stable high voltage system circuit busbar voltage is achieved the purpose that by the charge and discharge of large bulk capacitance on bus；The configuration of the present invention is simple simultaneously, it is at low cost.
Description
Technical field
The present invention relates to new-energy automobile fields, use more specifically to a kind of new-energy automobile with preliminary filling, electric discharge
And the power distribution circuit of voltage stabilizing function.
Background technique
With the environmental problem and energy crisis got worse, new-energy automobile comes into being in this context.New energy
Source automobile primary will be provided main energy sources by power battery, and the energy source of power battery is responsible for transmission by high-voltage electric system, and
Power distribution circuit is the kernel control module of high-voltage electric system again.
Electric machine controller MCU is for handling the high-voltage electricity of input to control the operating status of motor, generally in electricity
The large bulk capacitance of multiple parallel connections is arranged in machine control signal, those large bulk capacitances are to input preposition capacitor, for filtering
And stablize the input voltage of motor.Other high-voltage system loads in vehicle, such as compressor of air conditioner are equally built-in with front end electricity
Hold.Work as vehicle launch, when carrying out high pressure power on operation, biggish dash current, dash current can be generated in high-pressure system bus
High voltage connector and fuse, breakdown front end capacitor can be damaged and accelerate cell degradation.Thus power distribution in the prior art
Unit (Fig. 1) can configure pre-charge circuit (Fig. 2) between battery system and high-voltage load.
But stop when in vehicle, when carrying out electrically operated under high pressure, in electric machine controller MCU and high-voltage system load etc.
Certain electricity is still stored in the front end capacitor set, this can cause certain security threat to vehicle and personnel etc..In addition, in hydrogen
In energy automobile, fuel cell FC, which has, starts the disadvantages of time is long, and dynamic responding speed is slow, thus introduces in electricity generation system
Super capacitor SC is as energy buffer unit.Furthermore fuel battery engines FC spread of voltage in power supply process, while
The rear end fuel battery engines FC increases DC/DC to control output voltage.Theoretically, fuel battery engine system starting and
When high-voltage load changes rapidly, busbar voltage can be stablized by the charge and discharge of super capacitor SC and the control of DC/DC.
But in actual operation, the control of super capacitor SC and DC/DC, which can not be completely secured, can achieve ideal response speed, because
And there are still the possibility shaken for busbar voltage.Problem above, power distribution technology in the prior art will be unable to solve.
Summary of the invention
The technical problem to be solved in the present invention is that for above-mentioned technological deficiency, a kind of new-energy automobile is provided
Power distribution circuit, the circuit have the power distribution circuit of pre- charge and discharge and voltage stabilizing function.
The present invention is to solve its technical problem, and the power distribution circuit of provided new-energy automobile includes:
New energy source fuel cell；
Unidirectional DC/DC converter, input terminal connect the output end of the new energy source fuel cell；
Two-way DC/DC converter, the positive output end and negative output terminal of first group of connecting pin are connected to unidirectional DC/DC and turn
On the positive output end and negative output terminal of parallel operation；
Super capacitor is connected between the positive output end and negative output terminal of second group of connecting pin of two-way DC/DC converter；
Precharge control circuit, including the first open type controlled switch, the second open type controlled switch and current-limiting resistance,
First open type controlled switch is in parallel with the second open type controlled switch after connecting with current-limiting resistance, two points in parallel respectively as
First connecting pin and second connection end, the first connecting pin connect the positive output end of unidirectional DC/DC converter；
Third open type controlled switch, a switch connecting pin connect the negative output terminal of unidirectional DC/DC converter；
Discharge circuit, including the 4th open type controlled switch and discharge resistance, the 4th open type controlled switch and electric discharge
Another switch of second connection end and third open type controlled switch that precharge control circuit is connected to after resistance series connection connects
It connects on end；
Electric machine controller MCU, positive input terminal connect the second connection end of precharge control circuit, and negative input end connects third
On another switch connecting pin of open type controlled switch, between the positive input terminal and negative input end of electric machine controller MCU simultaneously
It is associated with preposition input capacitance；
Charge and discharge capacitance is attempted by between the positive input terminal and negative input end of electric machine controller MCU.
Further, in power distribution circuit of the invention, the positive input terminal and negative input of the electric machine controller MCU
It is also parallel with load between end, is parallel with preposition input capacitance between the positive input terminal and negative input end respectively loaded.
Further, in power distribution circuit of the invention, the load includes compressor of air conditioner.
Further, in power distribution circuit of the invention, the two-way DC/DC converter, the unidirectional DC/DC turn
Parallel operation, the electric machine controller MCU and branch where the load are in series with fuse respectively.
Further, in power distribution circuit of the invention, the control terminal point of first to fourth open type controlled switch
VCU is not connected to it.
Further, in power distribution circuit of the invention, the first connecting pin of precharge control circuit and second connects
It connects and is connected with a voltage sampling circuit between end, the output end of voltage sampling circuit is connected to VCU.
Further, in power distribution circuit of the invention, the charge and discharge capacitance is composed in parallel by two capacitors.
Further, in power distribution circuit of the invention, the first open type controlled switch and the 4th open type are controlled
Switch is relay, and the second open type controlled switch and third open type controlled switch are contactors.
In the power distribution circuit for implementing new-energy automobile of the invention, have the advantages that
It is still to store electricity in electric machine controller MCU and front end capacitor built in high-voltage system load when solving electricity under high pressure
This problem is measured, the present invention increases a discharge circuit on the basis of existing power supply allocation unit, to stop in vehicle, carries out
The electricity of the front end capacitor memory storage built in electric machine controller MCU and high-voltage system load is bled off when electrically operated under high pressure.For solution
When certainly fuel battery engine system starting and load change rapidly, super capacitor SC and DC/DC are responded not in time, are caused
This unstable problem of busbar voltage, the present invention is on the basis of existing power supply distributor circuit, two great Rong of parallel connection on bus
Capacitor C1, C2 are measured, stable high voltage system circuit busbar voltage is achieved the purpose that by the charge and discharge of large bulk capacitance.Simultaneously
The configuration of the present invention is simple, it is at low cost.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 is the schematic diagram of power distribution circuit in the prior art；
Fig. 2 is the schematic diagram of pre-charge circuit；
Fig. 3 is the circuit diagram of one embodiment of power distribution circuit；
Fig. 4 is the schematic diagram of discharge circuit in Fig. 3；
Fig. 5 is the schematic diagram of voltage regulator circuit.
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, now control attached drawing is described in detail
A specific embodiment of the invention.
It is the circuit diagram of one embodiment of power distribution circuit of the invention with reference to Fig. 3, provided by the present embodiment
New-energy automobile refers to that hydrogen energy source automobile, the power distribution circuit of new-energy automobile include:
New energy source fuel cell FC, i.e. hydrogen energy source fuel cell FC；
Unidirectional DC/DC converter, input terminal connect the output end of the new energy source fuel cell FC；
Two-way DC/DC converter, the positive output end of first group of connecting pin (two connecting pins of bottom and upper segment i.e. in figure)
It is connected to negative output terminal on the positive output end and negative output terminal of unidirectional DC/DC converter；
Super capacitor SC is connected on second group of connecting pin (two connections on the left side i.e. in figure of two-way DC/DC converter
End) positive output end and negative output terminal between；
Precharge control circuit, including the first open type controlled switch K1, the second open type controlled switch K2 and current limliting
Resistance R1, the first open type controlled switch K1 is in parallel with the second open type controlled switch K2 after connecting with current-limiting resistance R1, and two
Respectively as the first connecting pin (left end) and second connection end (right end), the first connecting pin connects unidirectional DC/DC conversion in parallel o'clock
The positive output end of device, it may be assumed that the first connecting pin connects after being sequentially connected two switch terminals of the first open type controlled switch K1, resistance R1
Second connection end is connect, while the first connecting pin connects the second connection of two switch terminals connection of the second open type controlled switch K2
End；
Third open type controlled switch K3, a switch connecting pin connect the negative output terminal of unidirectional DC/DC converter；
Discharge circuit, including the 4th open type controlled switch K4 and discharge resistance R2, the 4th open type controlled switch K4
With discharge resistance R2, the second connection end and third open type controlled switch K3 of precharge control circuit are connected to after series connection
On another switch connecting pin；
Electric machine controller MCU, positive input terminal connect the second connection end of precharge control circuit, and negative input end connects third
On another switch connecting pin of open type controlled switch K3, between the positive input terminal and negative input end of electric machine controller MCU
It is parallel with preposition input capacitance (not shown)；
Charge and discharge capacitance is attempted by between the positive input terminal and negative input end of electric machine controller MCU；In the present embodiment, fill
Discharge capacity is composed in parallel by two capacitors C1, C2, and the capacitance of the two capacitors is larger；
Load, especially high-voltage load, such as compressor of air conditioner, the positive input terminal and negative input end of electric machine controller MCU it
Between the in parallel load, be parallel with preposition input capacitance between the positive input terminal and negative input end respectively loaded.
Wherein, the control terminal of first to fourth open type controlled switch is respectively connected to VCU (Vehicle Control
Unit), receive the control of VCU to control the on-off between respective switch terminals.
In the present invention, the first open type controlled switch and the 4th open type controlled switch are relays, the second open type
Controlled switch and third open type controlled switch are contactors.
With reference to Fig. 2, work as vehicle launch, when carrying out high pressure power on operation, since new energy source fuel cell FC starts slower, head
First released energy by two-way DC/DC converter to preposition defeated in electric machine controller MCU and (high pressure) load by super capacitor SC
Entering capacitor and carries out preliminary filling, when preliminary filling, VCU controls the first open type controlled switch K1, third open type controlled switch K3 closure, this
When the second open type controlled switch K2, the 4th open type controlled switch K4 continue to disconnect, super capacitor SC current direction at this time are as follows:
SC → two-way DC/DC converter → K1 → R1 → load, MCU → K3 → SC, such preposition input capacitance are electrically charged.Wherein, by
In new energy source fuel cell FC during gradually starting, least a portion of energy can be also provided and be pre-charged.Current-limiting resistance
The purpose of R1 is so that the electric current being pre-charged is unlikely to excessive.
After preliminary filling is completed, VCU controls the second open type K2 controlled switch closure, at this time the second open type controlled switch
K2, the 4th open type controlled switch K4 continue disconnect (the first open type controlled switch K1, which can both be disconnected, can continue to be closed,
Branch where K1 does not flow into branch where K1 by K2 short circuit, electric current when closure).As a kind of preferred embodiment of the invention, in advance
A voltage sampling circuit is connected between first connecting pin of charging control circuit and second connection end, voltage sampling circuit
Output end is connected to VCU by CAN, and VCU carries out following judgements: when the both end voltage of voltage sampling circuit is equal or both end voltage
Difference is less than or equal to a certain setting value constantly, illustrates that precharge is completed, otherwise precharge does not complete.
With reference to Fig. 5, then, the electric energy of new energy source fuel cell FC is sufficiently large, at this time mainly by new energy fuel electricity
Pond FC is to electric machine controller MCU and (high pressure) load supplying, vehicle launch, in vehicle launch, if electric machine controller MCU or
(high pressure) load input voltage fluctuates, and capacitor C1, C2 of voltage regulator circuit can stablize mother by way of rapid charge and discharge
Line voltage.During this, new energy source fuel cell FC can be charged by two-way DC/DC converter to super capacitor SC simultaneously,
In case precharge next time.
With reference to Fig. 4, when vehicle stops, and carries out electrically operated under high pressure, VCU controls the 4th open type controlled switch K4 and closes
Close, third open type controlled switch K3 disconnect and/or open type controlled switch K1, K2 it is all off, to electric machine controller MCU,
Capacitor C1, C2 in (high pressure) load and charge and discharge capacitance discharge.When discharge circuit system discharge is completed, VCU control is put
Electric controlled switch K4 is disconnected, and completes electricity under vehicle.
In some other embodiment of the invention, the two-way DC/CD converter, the unidirectional DC/DC converter, institute
It states electric machine controller MCU and the responsible place branch is in series with fuse respectively, i.e., Fuse shown in figure is (in figure only
It identifies at one).
The embodiment of the present invention is described with above attached drawing, but the invention is not limited to above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art
Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much
Form, all of these belong to the protection of the present invention.
Claims (8)
1. a kind of power distribution circuit of new-energy automobile with preliminary filling, electric discharge and voltage stabilizing function characterized by comprising
New energy source fuel cell；
Unidirectional DC/DC converter, input terminal connect the output end of the new energy source fuel cell；
Two-way DC/DC converter, the positive output end and negative output terminal of first group of connecting pin are connected to unidirectional DC/DC converter
Positive output end and negative output terminal on；
Super capacitor is connected between the positive output end and negative output terminal of second group of connecting pin of two-way DC/DC converter；
Precharge control circuit, including the first open type controlled switch, the second open type controlled switch and current-limiting resistance, first
Open type controlled switch is in parallel with the second open type controlled switch after connecting with current-limiting resistance, and two parallel connections o'clock are respectively as first
Connecting pin and second connection end, the first connecting pin connect the positive output end of unidirectional DC/DC converter；
Third open type controlled switch, a switch connecting pin connect the negative output terminal of unidirectional DC/DC converter；
Discharge circuit, including the 4th open type controlled switch and discharge resistance, the 4th open type controlled switch and discharge resistance
The second connection end of precharge control circuit and another switch connecting pin of third open type controlled switch are connected to after series connection
On；
Electric machine controller MCU, positive input terminal connect the second connection end of precharge control circuit, and it is normally opened that negative input end connects third
On another switch connecting pin of type controlled switch, it is parallel between the positive input terminal and negative input end of electric machine controller MCU
Preposition input capacitance；
Charge and discharge capacitance is attempted by between the positive input terminal and negative input end of electric machine controller MCU.
2. power distribution circuit according to claim 1, which is characterized in that the positive input terminal of the electric machine controller MCU
It is also parallel with load between negative input end, is parallel with preposition input capacitance between the positive input terminal and negative input end respectively loaded.
3. power distribution circuit according to claim 2, which is characterized in that the load includes compressor of air conditioner.
4. power distribution circuit according to claim 2, which is characterized in that the two-way DC/DC converter, described unidirectional
DC/DC converter, the electric machine controller MCU and branch where the load are in series with fuse respectively.
5. power distribution circuit according to claim 1, which is characterized in that the control of first to fourth open type controlled switch
End processed is respectively connected to VCU.
6. power distribution circuit according to claim 5, which is characterized in that the first connection of the precharge control circuit
It is connected with a voltage sampling circuit between end and second connection end, the output end of voltage sampling circuit is connected to VCU.
7. power distribution circuit according to claim 1, which is characterized in that the charge and discharge capacitance is by two capacitor parallel connections
Composition.
8. power distribution circuit according to claim 1, which is characterized in that the first open type controlled switch and the 4th normally opened
Type controlled switch is relay, and the second open type controlled switch and third open type controlled switch are contactors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811236961.7A CN109353233A (en) | 2018-10-23 | 2018-10-23 | Power distribution circuit of the new-energy automobile with preliminary filling, electric discharge and voltage stabilizing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811236961.7A CN109353233A (en) | 2018-10-23 | 2018-10-23 | Power distribution circuit of the new-energy automobile with preliminary filling, electric discharge and voltage stabilizing function |
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| Publication Number | Publication Date |
|---|---|
| CN109353233A true CN109353233A (en) | 2019-02-19 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811236961.7A Pending CN109353233A (en) | 2018-10-23 | 2018-10-23 | Power distribution circuit of the new-energy automobile with preliminary filling, electric discharge and voltage stabilizing function |
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| CN (1) | CN109353233A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110014838A (en) * | 2019-03-29 | 2019-07-16 | 武汉格罗夫氢能汽车有限公司 | A kind of vehicle power-on and power-off control method based on multi-power system |
| CN110103733A (en) * | 2019-04-01 | 2019-08-09 | 武汉格罗夫氢能汽车有限公司 | A kind of Hydrogen Fuel-cell Vehicles auxiliary energy system |
| CN110588352A (en) * | 2019-09-27 | 2019-12-20 | 中植一客成都汽车有限公司 | Pre-charging protection circuit and method for vehicle-mounted hydrogen fuel cell and electric vehicle |
| CN111682519A (en) * | 2020-06-29 | 2020-09-18 | 潍柴动力股份有限公司 | Control method, device and equipment of battery system and computer storage medium |
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