CN107953794A - Automotive electrical system - Google Patents
Automotive electrical system Download PDFInfo
- Publication number
- CN107953794A CN107953794A CN201711248254.5A CN201711248254A CN107953794A CN 107953794 A CN107953794 A CN 107953794A CN 201711248254 A CN201711248254 A CN 201711248254A CN 107953794 A CN107953794 A CN 107953794A
- Authority
- CN
- China
- Prior art keywords
- contactor
- voltage
- circuit
- power supply
- controller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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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
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
-
- 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
-
- 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
Abstract
The invention discloses a kind of automotive electrical system, it is related to automobile technical field, when for avoiding the power supply in automobile being power supply for electrical equipment, due to electric current excessive the problem of damage is caused to electricity consumption device.The present invention main technical schemes be：A kind of automotive electrical system, including：Charging circuit, precharging circuit, voltage detector and controller；Power supply circuit, it is parallel to the both ends of power supply, and power supply circuit includes the capacitance and first contactor of series connection；Precharging circuit, it is parallel to the both ends of first contactor, and precharging circuit includes the preliminary filling resistance and preliminary filling contactor of series connection；Voltage detector, it is parallel to the both ends of precharging circuit, and controller is transferred to for detecting the information of voltage at precharging circuit both ends, and by information of voltage；Controller, its input terminal are connected to voltage detector, its output terminal is connected to first contactor and preliminary filling contactor.Present invention is mainly used for provide electric energy and realize automated control.
Description
Technical field
The present invention relates to automobile technical field, more particularly to a kind of automotive electrical system.
Background technology
In the electrical system of electric automobile, power battery is usually connected to a variety of high voltage electrics by high tension distribution system
Equipment, and high tension distribution system is mainly used for that the electric energy of power battery is allocated, controlled and managed.
Capacitor element is configured with a variety of high voltage electric equipment of electric automobile, is formed when electrical equipment with power battery
When circuit is closed by contactor, in the moment of closure, power battery charges the capacitor element in electrical equipment, due to voltage
Poor moment becomes larger, and will make to produce instantaneous large-current in circuit, and the devices such as the contactor in circuit, cable can thus caused
Destroy.
The content of the invention
In view of this, the embodiment of the present invention provides a kind of automotive electrical system, and main purpose is for avoiding in automobile
When power supply is power supply for electrical equipment, due to electric current it is excessive to electricity consumption device cause damage the problem of.
To reach above-mentioned purpose, present invention generally provides following technical solution：
An embodiment of the present invention provides a kind of automotive electrical system, including：Charging circuit, precharging circuit, voltage detector
And controller；
The power supply circuit, it is parallel to the both ends of power supply, and the power supply circuit includes capacitance and the first contact of series connection
Device, the first contactor are used for the break-make for controlling the power supply circuit；
The precharging circuit, it is parallel to the both ends of the first contactor, and the precharging circuit includes the preliminary filling of series connection
Resistance and preliminary filling contactor, the preliminary filling contactor are used for the break-make for controlling the precharging circuit；
The voltage detector, it is parallel to the both ends of the precharging circuit, for detecting the precharging circuit both ends
Information of voltage, and the information of voltage is transferred to the controller；
The controller, its input terminal are connected to the voltage detector, its output terminal is connected to first contactor
With preliminary filling contactor, for when the magnitude of voltage of the information of voltage is less than predeterminated voltage, the controller control described first
Contactor closes, and controls the preliminary filling contactor to disconnect.
Alternatively, the predeterminated voltage is the 4% to 6% of the supply voltage.
Alternatively, the preliminary filling resistance is posive temperature coefficient thermistor, and the resistance value of the preset resistance is 100-150 Europe
Nurse.
Alternatively, the power supply circuit further includes second contactor, the second contactor and the capacitance, described first
Contactor is connected in series, and the second contactor is used for the break-make for controlling the power supply circuit.
Alternatively, the precharging circuit further includes current detector, the current detector, the preliminary filling resistance and described
Preliminary filling contactor is connected in series.
Alternatively, the automotive electrical system, further includes：
Alarm, the alarm are connected to the current detector, and the current detector is used for the electricity that will be detected
Stream information is sent to the alarm, and when the current value of the current information is higher than pre-set current value, the alarm is sent
Alarm, wherein, the pre-set current value is 4-6 amperes.
Alternatively, the current detector is also attached to controller, when the current value of the current information is higher than described pre-
If during current value, the controller controls the second contactor to disconnect.
Alternatively, the controller is entire car controller.
Alternatively, the power supply is power battery.
An embodiment of the present invention provides a kind of automotive electrical system, is power supply for electrical equipment for avoiding the power supply in automobile
When, due to electric current it is excessive to electricity consumption device cause damage the problem of.And in the prior art, a variety of high voltage electrics of electric automobile are set
Capacitor element is configured with standby, when the circuit of electrical equipment and power battery formation is closed by contactor, in the wink of closure
Between, power battery charges the capacitor element in electrical equipment, since voltage difference moment becomes larger, will make to produce moment in circuit
High current, thus can damage the devices such as the contactor in circuit, cable.Compared with prior art, present specification
The automotive electrical system of offer includes：Charging circuit, precharging circuit, voltage detector and controller；Wherein, in charging circuit
First contactor and capacitance are series at the both ends of power supply, and precharging circuit is parallel between the both ends of first contactor, voltage detecting
Device is parallel to the both ends of precharging circuit, wherein, precharging circuit includes the preliminary filling resistance and preliminary filling contactor of series connection, when power supply needs
For power supply for electrical equipment when, first, pass through controller and control first contactor to disconnect, control preliminary filling contactor closure, due to pre-
There is preliminary filling resistance in charging circuit, and then the current value in circuit can be reduced, to reduce the damage to electric elements in circuit,
As capacitance constantly charges, the electric current in circuit also constantly reduces, when the voltage at precharging circuit both ends is decreased to default electricity
During pressure, by controller first contactor can be controlled to close, control preliminary filling contactor disconnects, and power supply is supplied for electrical equipment
Electricity, avoids the preliminary filling resistance consumption in precharging circuit from wasting electric energy.
Brief description of the drawings
Fig. 1 is a kind of structure diagram of automotive electrical system provided in an embodiment of the present invention.
Embodiment
Further to illustrate the present invention to reach the technological means and effect that predetermined goal of the invention is taken, below in conjunction with
Attached drawing and preferred embodiment, to the electrical system according to automobile proposed by the present invention its embodiment, structure, feature and its
Effect, describes in detail as after.
As shown in Figure 1, an embodiment of the present invention provides a kind of automotive electrical system, including：Charging circuit, precharging circuit,
Voltage detector 6 and controller 9；
Power supply circuit, it is parallel to the both ends of power supply 1, and power supply circuit includes the capacitance 2 and first contactor 3 of series connection, the
One contactor 3 is used for the break-make for controlling power supply circuit；
Precharging circuit, it is parallel to the both ends of first contactor 3, and precharging circuit includes the preliminary filling resistance 41 and preliminary filling of series connection
Contactor 42, preliminary filling contactor 42 are used for the break-make for controlling precharging circuit；
Voltage detector 6, it is parallel to the both ends of precharging circuit, for detecting the information of voltage at precharging circuit both ends, and
Information of voltage is transferred to controller 9；
Controller 9, its input terminal are connected to voltage detector 6, its output terminal is connected to first contactor 3 and preliminary filling
Contactor 42, for when the magnitude of voltage of information of voltage is less than predeterminated voltage, the control of controller 9 first contactor 3 to close, and controls
Preliminary filling contactor 42 disconnects.
Wherein, power supply 1 can be the power battery in electric automobile, it is used to provide power and electricity for electric automobile
Can, usual power supply 1 is mainly used for being powered for the electrical equipments such as motor, AC/DC changeover switch 5, in motor, AC-DC conversion
All there are capacitance 2 in the electrical equipments such as device 5, capacitance 2 is mainly used for being powered for electrical equipment 5, in order to avoid capacitance 2 with
Power supply 1 produces larger electric current when connecting and electric elements is caused to damage, the precharge in parallel between the both ends of first contactor 3
Preinstalled circuit, can be connected serially in circuit by road on startup, due to having preliminary filling resistance 41 in precharging circuit, and then can subtract
Current value during small startup, and then reduce the damage to electric elements in circuit, in addition, as capacitance 2 constantly charges, circuit
In electric current also constantly reduce, after the electric current in circuit is decreased to security value (s), first contactor 3 can be closed, will
Preliminary filling contactor disconnects, and flows a current through first contactor 3, avoids the preliminary filling resistance 41 in precharging circuit from consuming electric energy.According to
The above-mentioned course of work understands that staff can be by the control to first contactor 3 and preliminary filling contactor 42, to realize electricity
The conversion on road, when needing to protect electric elements, can close preliminary filling contactor 42, disconnect first contactor 3, flow a current through
Precharging circuit, to reduce electric current, protects electric elements, after part electricity is filled with capacitance, can open preliminary filling and connect
Tentaculum 42, closes first contactor, flows a current through first contactor 3, so can consume electric energy to avoid precharging circuit.
Wherein, controller 9 is the controller 9 in this programme, the controller 9 and voltage detector 6, first contactor 3,
It is communication connection between preliminary filling contactor 42, first contactor 3 and preliminary filling contactor 42 can be automatically controlled by controller 9
Open or close, and then realize and the device in electrical system is protected.
Vapour in the present embodiment is illustrated below by way of the working process and principle of automotive electrical system in the present embodiment
Car electrical system：
First, first contactor 3 is controlled to disconnect by controller 9, control preliminary filling contactor 42 closes, and connects capacitance 2
In power supply 1, power supply 1 charges for capacitance 2.
Then, the information of voltage at precharging circuit both ends is detected by voltage detector 6, when the voltage at precharging circuit both ends is believed
When the magnitude of voltage of breath is less than predeterminated voltage, controller 9 controls first contactor 3 to close, and control preliminary filling contactor 42 disconnects, and makes electricity
Source 1 is normally powered for electrical equipment 5.
An embodiment of the present invention provides a kind of automotive electrical system, is power supply for electrical equipment for avoiding the power supply in automobile
When, due to electric current it is excessive to electricity consumption device cause damage the problem of.And in the prior art, a variety of high voltage electrics of electric automobile are set
Capacitor element is configured with standby, when the circuit of electrical equipment and power battery formation is closed by contactor, in the wink of closure
Between, power battery charges the capacitor element in electrical equipment, since voltage difference moment becomes larger, will make to produce moment in circuit
High current, thus can damage the devices such as the contactor in circuit, cable.Compared with prior art, present specification
The automotive electrical system of offer includes：Charging circuit, precharging circuit, voltage detector and controller；Wherein, in charging circuit
First contactor and capacitance are series at the both ends of power supply, and precharging circuit is parallel between the both ends of first contactor, voltage detecting
Device is parallel to the both ends of precharging circuit, wherein, precharging circuit includes the preliminary filling resistance and preliminary filling contactor of series connection, when power supply needs
For power supply for electrical equipment when, first, pass through controller and control first contactor to disconnect, control preliminary filling contactor closure, due to pre-
There is preliminary filling resistance in charging circuit, and then the current value in circuit can be reduced, to reduce the damage to electric elements in circuit,
As capacitance constantly charges, the electric current in circuit also constantly reduces, when the voltage at precharging circuit both ends is decreased to default electricity
During pressure, by controller first contactor can be controlled to close, control preliminary filling contactor disconnects, and power supply is supplied for electrical equipment
Electricity, avoids the preliminary filling resistance consumption in precharging circuit from wasting electric energy.
Further, predeterminated voltage is the 4% to 6% of 1 voltage of power supply.In the present embodiment, due to the electricity of preliminary filling resistance 41
Resistance value is definite value, so the electric current in the more low then circuit of the voltage at precharging circuit both ends is smaller, when the electricity at both ends in precharging circuit
Force down when predeterminated voltage, then illustrate that the current value in circuit is in safe range, and then precharging circuit can be disconnected, and it is pre-
If the magnitude of voltage of voltage can be set according to the magnitude of voltage of power supply 1, such as：When the voltage of power supply 1 is 100V, electricity is preset
Pressure can be 5V, and when the voltage of power supply 1 is 200V, predeterminated voltage can be 10V, wherein, the setting of predeterminated voltage can root
It is adjusted, is not limited thereto according to actual conditions.
Further, preliminary filling resistance 41 is posive temperature coefficient thermistor, and the resistance value of preset resistance is 100-150 ohm.
In the present embodiment, posive temperature coefficient thermistor (Positive Temperature Coefficient, PTC), PTC temperature-sensitives electricity
Resistance is the semiconductor resistor that a kind of typical case has temperature sensitivity, and during more than certain temperature, its resistance value is with temperature
Rise being increased in step evolution, so due to ptc material characteristic, make preset resistance will not because after overcurrent temperature rise occur it is quick-fried
Split, short circuit, short circuit, improve security, the reliability of automotive electrical system.
Further, above-mentioned power supply circuit further includes second contactor 7, second contactor 7 and capacitance, first contactor 7
It is connected in series, second contactor 7 is used for the break-make for controlling power supply circuit.In the present embodiment, second contactor 7 can be automobile electricity
The protection switch of gas system, when automotive electrical system failure or problem, can promptly disconnect second contactor 7, avoid
There is more serious damage in automotive electrical system, during connected loop, first can close second contactor 7, so
Preliminary filling contactor 42 is closed again afterwards.
Further, precharging circuit further includes current detector 8, current detector 8, preliminary filling resistance 41 and preliminary filling contactor
42 are connected in series.In the present embodiment, current detector 8 is used to detect current value in precharging circuit, when capacitance 2 is into line precharge
When, staff can understand the current information in circuit in real time by current detector 8, when the current value in reflux is excessive
When, staff can take measures in time, cause to damage to avoid automotive electrical system.
Further, above-mentioned automotive electrical system further includes：Alarm, alarm are connected to current detector 8, electric current inspection
Device 8 is surveyed to be used to the current information detected being sent to alarm, when the current value of current information is higher than pre-set current value, report
Alert device sends alarm, wherein, the pre-set current value is 4-6 amperes.In the present embodiment, it can be monitored in real time by alarm
Current information in precharging circuit, when the electric current in precharging circuit is excessive, i.e., when current value is higher than pre-set current value, alarm
Can alarm, to remind staff to be handled in time, in addition, the form of alarm can have it is a variety of, such as：Alarm
Device can be photoelectric alarm etc., be not limited thereto.
Further, current detector 8 is also attached to controller 9, when the current value of current information is higher than pre-set current value
When, controller 9 controls second contactor 7 to disconnect.In the present embodiment, by the way that current detector 8 is also attached to controller 9, electricity
When the current value of stream information is higher than pre-set current value, controller 9 controls second contactor 7 to disconnect, can be to avoid in precharging circuit
The excessive security for causing to damage to electrical system, improving electrical system of electric current.
Further, controller noted above 9 is entire car controller, in the present embodiment, since controller 9 is entire car controller,
The structure of electrical system to avoid control element is separately provided, can be thus simplified, has saved cost.
Further, power supply 1 is power battery.
An embodiment of the present invention provides a kind of automotive electrical system, is power supply for electrical equipment for avoiding the power supply in automobile
When, due to electric current it is excessive to electricity consumption device cause damage the problem of.And in the prior art, a variety of high voltage electrics of electric automobile are set
Capacitor element is configured with standby, when the circuit of electrical equipment and power battery formation is closed by contactor, in the wink of closure
Between, power battery charges the capacitor element in electrical equipment, since voltage difference moment becomes larger, will make to produce moment in circuit
High current, thus can damage the devices such as the contactor in circuit, cable.Compared with prior art, present specification
The automotive electrical system of offer includes：Charging circuit, precharging circuit, voltage detector and controller；Wherein, in charging circuit
First contactor and capacitance are series at the both ends of power supply, and precharging circuit is parallel between the both ends of first contactor, voltage detecting
Device is parallel to the both ends of precharging circuit, wherein, precharging circuit includes the preliminary filling resistance and preliminary filling contactor of series connection, when power supply needs
For power supply for electrical equipment when, first, pass through controller and control first contactor to disconnect, control preliminary filling contactor closure, due to pre-
There is preliminary filling resistance in charging circuit, and then the current value in circuit can be reduced, to reduce the damage to electric elements in circuit,
As capacitance constantly charges, the electric current in circuit also constantly reduces, when the voltage at precharging circuit both ends is decreased to default electricity
During pressure, by controller first contactor can be controlled to close, control preliminary filling contactor disconnects, and power supply is supplied for electrical equipment
Electricity, avoids the preliminary filling resistance consumption in precharging circuit from wasting electric energy.
The above description is merely a specific embodiment, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (9)
- A kind of 1. automotive electrical system, it is characterised in that including：Charging circuit, precharging circuit, voltage detector and controller；The power supply circuit, it is parallel to the both ends of power supply, and the power supply circuit includes the capacitance and first contactor of series connection, institute State the break-make that first contactor is used to control the power supply circuit；The precharging circuit, it is parallel to the both ends of the first contactor, and the precharging circuit includes the preliminary filling resistance of series connection With preliminary filling contactor, the preliminary filling contactor is used for the break-make for controlling the precharging circuit；The voltage detector, it is parallel to the both ends of the precharging circuit, for detecting the voltage at the precharging circuit both ends Information, and the information of voltage is transferred to the controller；The controller, its input terminal are connected to the voltage detector, its output terminal is connected to first contactor and pre- Contactor is filled, for when the magnitude of voltage of the information of voltage is less than predeterminated voltage, the controller control described first to contact Device closes, and controls the preliminary filling contactor to disconnect.
- 2. automotive electrical system according to claim 1, it is characterised in thatThe predeterminated voltage is the 4% to 6% of the supply voltage.
- 3. automotive electrical system according to claim 2, it is characterised in thatThe preliminary filling resistance is posive temperature coefficient thermistor, and the resistance value of the preset resistance is 100-150 ohm.
- 4. automotive electrical system according to claim 3, it is characterised in thatThe power supply circuit further includes second contactor, and the second contactor is connected with the capacitance, the first contactor Connection, the second contactor are used for the break-make for controlling the power supply circuit.
- 5. automotive electrical system according to claim 4, it is characterised in thatThe precharging circuit further includes current detector, the current detector, the preliminary filling resistance and the preliminary filling contactor It is connected in series.
- 6. automotive electrical system according to claim 5, it is characterised in that further include：Alarm, the alarm are connected to the current detector, and the current detector is used to believe in the electric current detected Breath is sent to the alarm, and when the current value of the current information is higher than pre-set current value, the alarm sends alarm, Wherein, the pre-set current value is 4-6 amperes.
- 7. automotive electrical system according to claim 5, it is characterised in thatThe current detector is also attached to controller, when the current value of the current information is higher than the pre-set current value, The controller controls the second contactor to disconnect.
- 8. automotive electrical system according to claim 7, it is characterised in thatThe controller is entire car controller.
- 9. the electrical system of automobile according to claim 8, it is characterised in thatThe power supply is power battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711248254.5A CN107953794A (en) | 2017-12-01 | 2017-12-01 | Automotive electrical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711248254.5A CN107953794A (en) | 2017-12-01 | 2017-12-01 | Automotive electrical system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107953794A true CN107953794A (en) | 2018-04-24 |
Family
ID=61962357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711248254.5A Pending CN107953794A (en) | 2017-12-01 | 2017-12-01 | Automotive electrical system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107953794A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110525318A (en) * | 2019-10-08 | 2019-12-03 | 安徽江淮汽车集团股份有限公司 | Electronic refrigeration vehicle control and electronic refrigerator car |
| CN111376730A (en) * | 2018-12-29 | 2020-07-07 | 比亚迪股份有限公司 | Vehicle and power-on control device |
| CN112462315A (en) * | 2020-11-25 | 2021-03-09 | 中国第一汽车股份有限公司 | Current sensor diagnosis method and device, vehicle and storage medium |
| CN112753158A (en) * | 2018-08-01 | 2021-05-04 | 施密徳豪泽股份公司 | DC/DC converter and grid feedback unit |
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| CN112753158A (en) * | 2018-08-01 | 2021-05-04 | 施密徳豪泽股份公司 | DC/DC converter and grid feedback unit |
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| CN112462315A (en) * | 2020-11-25 | 2021-03-09 | 中国第一汽车股份有限公司 | Current sensor diagnosis method and device, vehicle and storage medium |
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