CN105620292B - A kind of control system and method for automobile high voltage supply - Google Patents
A kind of control system and method for automobile high voltage supply Download PDFInfo
- Publication number
- CN105620292B CN105620292B CN201610045122.1A CN201610045122A CN105620292B CN 105620292 B CN105620292 B CN 105620292B CN 201610045122 A CN201610045122 A CN 201610045122A CN 105620292 B CN105620292 B CN 105620292B
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- Prior art keywords
- high voltage
- voltage supply
- contact device
- entire car
- car controller
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- 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
Abstract
The present invention provides a kind of control system and method for automobile high voltage supply, and the system includes：Current measuring element, positive contact device, cathode contact device, preliminary filling contactor, preliminary filling resistance, protection electric capacity and entire car controller.When upper electric, cathode contact device described in the vehicle control unit controls and preliminary filling contactor closure, the preliminary filling resistance and the protection electric capacity are charged, when the current value of the high voltage supply is equal to first threshold greatly, the positive contact device closure.When lower electric, the current value of the high voltage supply is small be equal to Second Threshold when, the entire car controller just controls the cathode contact device to disconnect.The present invention provides the system when can solve contactor closed and disconnected, because contactor burns or the problem of explosion accident caused by super-high-current, improves the security of automotive electrical system.
Description
Technical field
The present invention relates to automobile high voltage supply field, and in particular to a kind of control system and method for automobile high voltage supply.
Background technology
In order to ensure the safe to use of electric automobile, existing electric automobile in high voltage supply loop often using contactor and
Fuse.When electric on vehicle, associated contact device adhesive, battery pack gives the power supply of vehicle high-voltage load；When lower electric, associated contact
Device disconnects, so as to disconnect battery pack external loading, while excessively stream or it is short-circuit when, pass through fuse cutoff high current supply circuit.
This high voltage supply loop in actual use, there are problems that some defects and.Such as：Moment is closed in contactor, it is excessive
Ablation occurs for the contact that electric current may result in contactor.Moment is disconnected in contactor, the contact of contactor can produce electric arc, right
The contact point of contactor produces damage, influences the life-span of contactor, and if electric current is sufficiently large, may result in the quick-fried of contactor
It is fried.Meanwhile when there is overload current in vehicle high voltage supply loop, if fuse needs the time without normally fusing or fusing
It is oversize, the infringement of high pressure component may be caused.In vehicle travel process, once occur colliding or other influences personal safety
Situation, in order to ensure that battery pack externally can disconnect contactor without High voltage output, entire car controller.But if having occurred and that short
Road, and fuse does not have enough time also fusing, the serious ablation of contactor may be caused or even explode by now disconnecting contactor.Cause
How this efficiently controls high voltage supply loop, is still the important topic for ensureing auto electric safety.
The content of the invention
The present invention provides a kind of control system and method for automobile high voltage supply, when solving contactor closed and disconnected, because
Super-high-current causes contactor to burn or the problem of explosion accident, improves the security of automotive electrical system.
To realize object above, the present invention provides following technical scheme：
A kind of control system of automobile high voltage supply, wherein, including：Current measuring element, positive contact device, cathode contact
Device, preliminary filling contactor, preliminary filling resistance, protection electric capacity and entire car controller；
The input of the positive contact device is connected with the positive pole of battery pack, the output end of the positive contact device respectively with
The cathode output end of vehicle high voltage supply, the preliminary filling resistance output end and it is described protection electric capacity one end be connected, it is described just
The control terminal of pole contactor is connected with the first output end of the entire car controller；
The input of the cathode contact device is connected with the first output end of the current measuring element, the cathode contact
The output end of device is connected with the cathode output end of vehicle high voltage supply and the other end of the protection electric capacity respectively, and the negative pole connects
The control terminal of tentaculum is connected with the second output end of the entire car controller；
The input of the current measuring element is connected with the negative pole of battery pack, the second output of the current measuring element
End is connected with the input of the entire car controller；
The input of the preliminary filling contactor is connected with the positive pole of battery pack, the output end of the preliminary filling contactor with it is described
The input of preliminary filling resistance is connected, and the control terminal of the preliminary filling contactor is connected with the 3rd output end of the entire car controller；
The current measuring element is used to detect high voltage supply electric current；
When upper electric, the high electricity of the 3rd output end output of the second output end and the entire car controller of the entire car controller
It is flat, when the current value of the high voltage supply is equal to first threshold greatly, the high electricity of the first output end output of the entire car controller
It is flat, and the 3rd output end output low level of the entire car controller；
When lower electric, the current value of the high voltage supply is small be equal to Second Threshold when, the first of the entire car controller is defeated
Go out end and the output end of entire car controller second output low level.
Preferably, when the current value of the high voltage supply is more than three threshold values, the first output of the entire car controller
Second output end of end and entire car controller output high level, and the entire car controller reports short trouble.
Preferably, when the current value in the high voltage supply is more than the 4th threshold value and is less than three threshold values, the vehicle control
First output end of device processed and the second output end output low level of the entire car controller, the entire car controller report excessively stream
Failure, and record overcurrent value and excessively stream number.
Preferably, in addition to fuse, one end of the fuse are connected with the positive pole of battery pack, the fuse it is another
One end is connected with the input of the positive contact device.
The present invention also provides a kind of control method of automobile high voltage supply, wherein, including：
Obtain high voltage supply electric current；
Obtain the control signal of the control signal of positive contact device, the control signal of cathode contact device and preliminary filling contactor；
When upper electric, the control signal output high level of the control signal of the cathode contact device and the preliminary filling contactor,
When the value of the high voltage supply electric current is equal to first threshold greatly, the control signal output high level of the positive contact device, and
The control signal output low level of the preliminary filling contactor；
When lower electric, the value of the high voltage supply electric current is small be equal to Second Threshold when, the positive contact device control letter
Number and the cathode contact device control signal output low level.
Preferably, when the value of the high voltage supply electric current is more than three threshold values, the control signal of the positive contact device
High level is exported with the control signal of the cathode contact device, and entire car controller reports short trouble.
Preferably, when the value in the high voltage supply electric current is more than the 4th threshold value and is less than three threshold values, the positive pole connects
The control signal of tentaculum and the control signal of cathode contact device output low level, and the entire car controller reports excessively stream event
Barrier, and record overcurrent value and excessively stream number.
Preferably, the folding of the control signal control positive contact device of the positive contact device, the cathode contact device
Control signal controls the folding of cathode contact device, the folding of the control signal control preliminary filling contactor of the preliminary filling contactor.
It can be seen that the control system and method for a kind of automobile high voltage supply provided by the invention, using precharging circuit and protection
Electric capacity is protected to the contactor of automobile high voltage supply, when effectively solving contactor closed and disconnected, caused by super-high-current
Contactor burns or the problem of explosion accident, improves the security of automotive electrical system.
Brief description of the drawings
In order to illustrate more clearly of the specific embodiment of the present invention, the required accompanying drawing used in embodiment will be made below
Simply introduce.
Fig. 1：It is a kind of control system architecture schematic diagram of automobile high voltage supply provided by the invention；
Fig. 2：It is a kind of control structure schematic diagram of automobile high voltage supply provided in an embodiment of the present invention；
Reference
1 positive contact device
2 preliminary filling contactors
3 cathode contact devices
4 current sensors
5 preliminary filling resistance
6 electrokinetic cells input cathode output end
7 electrokinetic cells input cathode output end
8 vehicle High voltage output cathode output ends
9 vehicle High voltage output cathode output ends
Embodiment
In order that those skilled in the art more fully understand the scheme of the embodiment of the present invention, below in conjunction with the accompanying drawings and implement
Mode is described in further detail to the embodiment of the present invention.
For existing electric automobile high-voltage power supply contactor closed and disconnected when, often contactor burns caused by super-high-current
Ruin or the problem of explosion accident, the present invention provides a kind of control system and method for automobile high voltage supply, by preliminary filling loop and
Electric capacity is protected, reduces electric current during high voltage supply loop contactor closed and disconnected, completes the protection to contactor, improves automobile
The security of electrical system.
As shown in figure 1, it is a kind of control system architecture schematic diagram of automobile high voltage supply provided by the invention.The system bag
Include：Current measuring element, positive contact device, cathode contact device, preliminary filling contactor, preliminary filling resistance R, protection electric capacity C and vehicle control
Device processed.
The input of the positive contact device is connected with the positive pole of battery pack, the output end of the positive contact device respectively with
One end of the cathode output end of vehicle high voltage supply, the output end of the preliminary filling resistance R and the protection electric capacity C is connected, described
The control terminal of positive contact device is connected with the first output end of the entire car controller.The input of the cathode contact device and institute
The first output end for stating current measuring element is connected, the output end of the cathode contact device negative pole with vehicle high voltage supply respectively
Output end is connected with the other end of the protection electric capacity C, and the of the control terminal of the cathode contact device and the entire car controller
Two output ends are connected.The input of the current measuring element is connected with the negative pole of battery pack, and the of the current measuring element
Two output ends are connected with the input of the entire car controller.The input of the preliminary filling contactor and the positive pole phase of battery pack
Even, the output end of the preliminary filling contactor is connected with the input of the preliminary filling resistance R, the control terminal of the preliminary filling contactor and
3rd output end of the entire car controller is connected.The current measuring element is used to detect high voltage supply electric current.
When upper electric, the high electricity of the 3rd output end output of the second output end and the entire car controller of the entire car controller
It is flat, when the current value of the high voltage supply is equal to first threshold greatly, the high electricity of the first output end output of the entire car controller
It is flat, and the 3rd output end output low level of the entire car controller.When lower electric, it is equal to the current value of the high voltage supply is small
During Second Threshold, the first output end and the output end of the entire car controller second the output low level of the entire car controller.
In actual applications, the current measuring element can be entered using current sensor to the electric current in high voltage supply loop
Row detection, can also be and combine the detection realized to electric current by current sensor and battery controller.Due to high voltage supply loop
In electric current it is larger, when selecting, should be noted range, the present embodiment uses more than 1500A range.Similarly, electric capacity is protected
Need to receive the charging process of high-tension current, the electric capacity for the 1000 μ F that the present embodiment uses in the loop.
Specifically, as shown in Fig. 2 illustrating for a kind of control structure of automobile high voltage supply provided in an embodiment of the present invention
Figure.The system includes：Positive contact device 1, preliminary filling contactor 2, cathode contact device 3, current sensor 4, preliminary filling resistance 5, power
Battery input cathode output end 6, electrokinetic cell input cathode output end 7, vehicle High voltage output cathode output end 8, vehicle high pressure
Output cathode output end 9, entire car controller and battery controller.In the embodiment, the battery controller passes through current sense
Device monitors vehicle high tension loop electric current, and current value is sent into entire car controller by CAN communication loop.
When upper electric, by closing cathode contact device 3, preliminary filling contactor 2 charges to electric machine controller internal capacitance, due to pre-
Filling in loop has preliminary filling resistance 5, can be by current reduction.Avoid directly closing positive contact device 1 in this way, negative pole connects
Occur damage of the peak point current to contactor during tentaculum 3, when capacitance voltage reaches the 90% or 95% of battery pack output voltage
During the above, closure positive contact device 1, now due to contactor both end voltage difference very little, obvious impact electricity will not be produced substantially
Stream, so as to play a part of protecting contactor.
When lower electric, current sensor 4 is powered by battery controller.After high tension loop electric current is less than setting value, by
Entire car controller disconnects positive contact device 1 and cathode contact device 3.Electricity under directly band load is avoided, makes the damage of contacts of contactor.
Further, when the current value of the high voltage supply is more than three threshold values, the first output of the entire car controller
Second output end of end and entire car controller output high level, and the entire car controller reports short trouble.
Specifically, when current sensor 4 detects that discharge current exceedes the short-circuit threshold values of setting, entire car controller judges
For short trouble, when short circuit, entire car controller keeps contactor to be in closure state, until fuse blows, fuse
Position both may be mounted inside service switch, can also be connected on the other positions of high tension loop, need to determine with actual circuit
It is fixed.
Further, when the current value in the high voltage supply is more than the 4th threshold value and is less than three threshold values, the vehicle control
First output end of device processed and the second output end output low level of the entire car controller, the entire car controller report excessively stream
Failure, and record overcurrent value and excessively stream number.
Specifically, when current sensor 4 detects that discharge current exceedes the excessively stream threshold values of setting, entire car controller judges
For over current fault, and by fault information reporting.During excessively stream, entire car controller disconnects positive contact device 1 and cathode contact device 3, really
Battery pack is protected externally without High voltage output.Ensure the safety of electrokinetic cell and vehicle, and broken by entire car controller record contactor
Electric current when opening, to assess the damaged condition of contactor.
Further, the system also includes fuse, and one end of the fuse is connected with the positive pole of battery pack, the fusing
The other end of device is connected with the input of the positive contact device.
In actual applications, often occur fuse it is also unblown when, contactor just disconnects, and such case easily causes blast thing
Therefore therefore for the folding control of contactor, need to be adapted with the material of fuse.
It can be seen that the present invention provides a kind of control system of automobile high voltage supply, by preliminary filling loop and protection electric capacity to vapour
The contactor of car high voltage supply is protected, and when effectively solving contactor closed and disconnected, contactor burns caused by super-high-current
Ruin or the problem of explosion accident, improve the security of automotive electrical system.
The present invention also provides a kind of control method of automobile high voltage supply, including：Obtain high voltage supply electric current；Obtain positive pole
The control signal of the control signal of contactor, the control signal of cathode contact device and preliminary filling contactor；
When upper electric, the control signal output high level of the control signal of the cathode contact device and the preliminary filling contactor,
When the value of the high voltage supply electric current is equal to first threshold greatly, the control signal output high level of the positive contact device, and
The control signal output low level of the preliminary filling contactor；When lower electric, it is equal to the second threshold the value of the high voltage supply electric current is small
During value, the control signal output low level of the control signal of the positive contact device and the cathode contact device.
In actual applications, the control of the control signal, cathode contact device of positive contact device can be obtained by entire car controller
The control signal of signal and preliminary filling contactor processed, meanwhile, the value of the high voltage supply electric current can also be carried out by entire car controller
Judge, and reporting fault information.
Further, when the value of the high voltage supply electric current is more than three threshold values, the control signal of the positive contact device
High level is exported with the control signal of the cathode contact device, and entire car controller reports short trouble.
Further, when the value in the high voltage supply electric current is more than the 4th threshold value and is less than three threshold values, the positive pole connects
The control signal of tentaculum and the control signal of cathode contact device output low level, and the entire car controller reports excessively stream event
Barrier, and record overcurrent value and excessively stream number.
Further, the folding of the control signal control positive contact device of the positive contact device, the cathode contact device
Control signal controls the folding of cathode contact device, the folding of the control signal control preliminary filling contactor of the preliminary filling contactor.
It can be seen that the present invention provides a kind of control method of automobile high voltage supply, by the current detecting to high voltage supply, by
The break-make in the control signal control high voltage supply loop of contactor, when can effectively solve contactor closed and disconnected, because of excessive electricity
Stream causes contactor to burn or the problem of explosion accident, improves the security of automotive electrical system.
Construction, feature and the action effect of the present invention, above institute is described in detail according to diagrammatically shown embodiment above
Only presently preferred embodiments of the present invention is stated, but the present invention is not to limit practical range shown in drawing, it is every according to structure of the invention
Want made change, or be revised as the equivalent embodiment of equivalent variations, when still without departing from specification and illustrating covered spirit,
All should be within the scope of the present invention.
Claims (8)
- A kind of 1. control system of automobile high voltage supply, it is characterised in that including：Current measuring element, positive contact device, negative pole Contactor, preliminary filling contactor, preliminary filling resistance, protection electric capacity and entire car controller；The input of the positive contact device is connected with the positive pole of battery pack, the output end of the positive contact device respectively with vehicle One end of the cathode output end of high voltage supply, the output end of the preliminary filling resistance and the protection electric capacity is connected, and the positive pole connects The control terminal of tentaculum is connected with the first output end of the entire car controller；The input of the cathode contact device is connected with the first output end of the current measuring element, the cathode contact device Output end is connected with the cathode output end of vehicle high voltage supply and the other end of the protection electric capacity respectively, the cathode contact device Control terminal be connected with the second output end of the entire car controller；The input of the current measuring element is connected with the negative pole of battery pack, the second output end of the current measuring element with The input of the entire car controller is connected；The input of the preliminary filling contactor is connected with the positive pole of battery pack, output end and the preliminary filling of the preliminary filling contactor The input of resistance is connected, and the control terminal of the preliminary filling contactor is connected with the 3rd output end of the entire car controller；The current measuring element is used to detect high voltage supply electric current；When upper electric, the second output end of the entire car controller and the 3rd output end output high level of the entire car controller, When the current value of the high voltage supply is equal to first threshold greatly, the first output end output high level of the entire car controller, And the 3rd output end output low level of the entire car controller；When lower electric, the current value of the high voltage supply is small be equal to Second Threshold when, the first output end of the entire car controller Low level is exported with the output end of entire car controller second.
- 2. the control system of automobile high voltage supply according to claim 1, it is characterised in that in the electricity of the high voltage supply When flow valuve is more than three threshold values, the first output end of the entire car controller and the second output end output of the entire car controller High level, and the entire car controller reports short trouble.
- 3. the control system of automobile high voltage supply according to claim 1, it is characterised in that in the electricity of the high voltage supply Flow valuve is more than the 4th threshold value and when being less than three threshold values, the first output end of the entire car controller and the entire car controller Second output end exports low level, and the entire car controller reports over current fault, and records overcurrent value and excessively stream number.
- 4. the control system of the automobile high voltage supply according to any one of claims 1 to 3, it is characterised in that also include molten Disconnected device, one end of the fuse are connected with the positive pole of battery pack, the other end of the fuse and the positive contact device Input is connected.
- A kind of 5. control method of automobile high voltage supply, it is characterised in that including：Obtain high voltage supply electric current；Obtain the control signal of the control signal of positive contact device, the control signal of cathode contact device and preliminary filling contactor；When upper electric, the control signal output high level of the control signal of the cathode contact device and the preliminary filling contactor, in institute When stating the value of high voltage supply electric current and being equal to first threshold greatly, the control signal output high level of the positive contact device, and it is described The control signal output low level of preliminary filling contactor；When lower electric, the value of the high voltage supply electric current is small be equal to Second Threshold when, the control signal of the positive contact device and The control signal output low level of the cathode contact device.
- 6. the control method of automobile high voltage supply according to claim 5, it is characterised in that in the high voltage supply electric current Value when being more than three threshold values, the high electricity of control signal output of the control signal of the positive contact device and the cathode contact device It is flat, and entire car controller reports short trouble.
- 7. the control method of automobile high voltage supply according to claim 5, it is characterised in that in the high voltage supply electric current Value be more than the 4th threshold value and when being less than three threshold values, the control of the control signal of the positive contact device and the cathode contact device Signal output low level processed, and entire car controller reports over current fault, and record overcurrent value and excessively stream number.
- 8. the control method of the automobile high voltage supply according to any one of claim 5 to 7, it is characterised in that the positive pole The folding of the control signal control positive contact device of contactor, the control signal control cathode contact device of the cathode contact device Folding, the folding of the control signal control preliminary filling contactor of the preliminary filling contactor.
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| CN201610045122.1A CN105620292B (en) | 2016-01-22 | 2016-01-22 | A kind of control system and method for automobile high voltage supply |
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| CN201610045122.1A CN105620292B (en) | 2016-01-22 | 2016-01-22 | A kind of control system and method for automobile high voltage supply |
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| CN105620292B true CN105620292B (en) | 2017-12-12 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106451370B (en) * | 2016-10-27 | 2018-08-24 | 中国北方车辆研究所 | A kind of high voltage connector band load disjunction control method |
| CN109823285A (en) * | 2017-11-20 | 2019-05-31 | 河南森源重工有限公司 | Electric system, power-on and power-off control method and control system above and below electric automobile high-voltage |
| CN108736452A (en) * | 2018-05-02 | 2018-11-02 | 深圳市欣旺达综合能源服务有限公司 | Circuit is protected in the anti-emptying of self-powered of battery energy storage system |
| CN110907688B (en) * | 2018-09-17 | 2021-01-29 | 宁德时代新能源科技股份有限公司 | Power failure detection circuit and control method thereof |
| CN109624786B (en) * | 2018-12-29 | 2021-08-20 | 蜂巢能源科技有限公司 | Power battery pre-charging resistor protection control method |
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Address after: 230601 Anhui Province, Hefei City Industrial Park, the Peach Blossom Road No. 669 Applicant after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: 230601 Anhui Province, Hefei City Industrial Park, the Peach Blossom Road No. 669 Applicant before: Anhui Jianghuai Automotive Co., Ltd. |
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