CN104149629B - A kind of pure electric automobile and high pressure cut-off circuit thereof and high pressure cut-off control method - Google Patents
A kind of pure electric automobile and high pressure cut-off circuit thereof and high pressure cut-off control method Download PDFInfo
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- CN104149629B CN104149629B CN201410457767.7A CN201410457767A CN104149629B CN 104149629 B CN104149629 B CN 104149629B CN 201410457767 A CN201410457767 A CN 201410457767A CN 104149629 B CN104149629 B CN 104149629B
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Abstract
The present invention provides a kind of high pressure cut-off circuit for pure electric automobile, including high tension loop and high pressure cut-off control circuit.High tension loop includes high voltage component, the first relay and the second relay, and the first relay and the second relay are all connected with each high voltage component, and the first relay includes that the first contact, the second relay include the second contact；High pressure cut-off control circuit includes battery management system, entire car controller and the 3rd relay, battery management system and the first relay and the second relay are connected, entire car controller and the 3rd relay are connected, one end of 3rd relay is connected with the voltage power supply less than 36 volts, and the first relay and the second relay are connected with this power supply by the 3rd relay.Meanwhile, the present invention also provides for a kind of pure electric automobile including above-mentioned high pressure cut-off circuit and a kind of high pressure cut-off control method based on this high pressure cut-off circuit.
Description
Technical field
The present invention relates to high voltage control field, particularly relate to a kind of high pressure cut-off circuit.Additionally, this
Bright further relate to a kind of control method for above-mentioned high pressure cut-off circuit and one includes above-mentioned high pressure cut-off electricity
The pure electric automobile on road.
Background technology
Along with expanding economy, the energy becomes increasingly conspicuous with environmental issue, and countries in the world all turn one's attention to
Environmental protection and energy-conservation pure electric automobile, an important feature of pure electric automobile is exactly that car is built with ensureing foot
The high tension loop of enough power performance.
And the normal working voltage of high tension loop is up to a few hectovolt, exceed far away the peace of 36 volts of human bodies
Full voltage, therefore, for protection personal safety, quits work at pure electric automobile, safeguards and trouble shooting
Time be required for the high pressure cut-off in car.Simultaneously as containing a large amount of powerful devices in pure electric automobile,
Curent change in main circuit is violent, and extremely short control postpones and interference all may be to pure electric automobile
Whole Circuits System causes infringement greatly.Therefore, this just requires that pure electric automobile can be in the short period
Inside carry out promptly high pressure cut-off, with life security and the running environment of vehicle of warrantor.
The high pressure cut-off circuit of conventional pure electric automobile, uses Single Controller to carry out high pressure cut-off.
Using Single Controller to carry out cutoff high, when system needs cutoff high, system is single except selecting this
Controller comes outside cutoff high, does not has other selection, when the generation of this Single Controller is aging or this is single
Time controller occurs the response situation such as not in time, largely add circuit high pressure cut-off not in time
May.Meanwhile, if using Single Controller, when this Single Controller is during pure electric automobile uses
Occur in that fault, it is impossible to when the most normally working, will can be used to cut off this pure electricity without other optional methods again
, there is high potential safety hazard in the high pressure of electrical automobile.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of high pressure cut-off circuit, pure electric automobile and high crush-cutting
Disconnected control method, the high-voltage safety potential problem caused to solve use Single Controller in prior art.
For achieving the above object, the following technical scheme of embodiment of the present invention offer:
A kind of high pressure cut-off circuit for pure electric automobile, controls electricity including high tension loop and high pressure cut-off
Road,
Wherein, described high tension loop includes high voltage component, the first relay and the second relay；
Wherein, described first relay is all connected with each described high voltage component with described second set of cells,
Described first relay includes that the first contact, described second relay include the second contact；
Described high pressure cut-off control circuit includes battery management system, entire car controller and the 3rd relay；
Wherein, described battery management system is connected with described first relay and described second relay, uses
Disconnect in controlling described first contact and described second contact；
Described entire car controller is connected with described 3rd relay, touches for controlling the 3rd of the 3rd relay the
Point disconnects；
One end of described 3rd relay is connected with the voltage power supply less than 36 volts, described first relay
Device and described second relay are connected with described power supply, when described 3rd contact by described 3rd relay
During disconnection, described first relay and described second relay are cut-off with the connection of described power supply, and first
Contact and the second contact disconnect.
Wherein, described high pressure cut-off circuit also includes: interlock circuit, and described interlock circuit includes that maintenance is opened
Closing and high-voltage connector, a described high-voltage connector inserts in a mutual interlocking of a described high potential assembly
Mouthful, described maintenance switch and all described interlocking interface tandems connect, described interlock circuit and described car load
Controller is connected in series；Described 3rd relay is connected with described entire car controller by described interlock circuit
Connect.
Wherein, described high pressure cut-off circuit also includes: switch fuse and parts fuse；
Described switch fuse is placed in the inside of described maintenance switch；
One described parts fuse one end is connected with described first relay, the other end and a described height
Splenium part is connected.
Wherein, described battery management system is connected, by second by the first outfan and the first relay
Outfan and the second relay are connected.
Wherein, the high end interface of the communication of described battery management system is by fieldbus and described full-vehicle control
The high end interface of communication of device be connected, the low end interface of communication of described battery management system by fieldbus with
The low end interface of communication of described entire car controller is connected.
A kind of pure electric automobile, including the high pressure cut-off circuit described in any of the above-described item.
A kind of high pressure cut-off control method, based on the high pressure cut-off circuit described in any of the above-described item, this high pressure
Cutting-off controlling method includes:
Battery management system controls the first contact and/or the second contact and disconnects, and high tension loop disconnects, pure electronic
The high pressure of automobile is cut off；
Vehicle control unit controls the 3rd contact disconnects, and makes the first relay and the second relay be less than with voltage
The power supply of 36 volts connects disconnection, thus the first contact and the second contact disconnect, and high tension loop disconnects,
The high pressure of pure electric automobile is cut off.
Wherein, described battery management system control the first contact and the second contact disconnect particularly as follows:
Battery management system controls the connection disconnection of the first outfan and ground, chassis, and the first contact disconnects；
Battery management system controls the connection disconnection of the second outfan and ground, chassis, and the second contact disconnects.
Wherein, described vehicle control unit controls the 3rd contact disconnects particularly as follows: entire car controller output is high electric
Flat, the 3rd contact disconnects.
Wherein, described high pressure cut-off control method also includes:
Extracting maintenance switch or arbitrary high-voltage connector, the 3rd relay disconnects with the connection of entire car controller,
3rd contact disconnects, thus the first contact and the second contact disconnect, and high tension loop disconnects, pure electric automobile
High pressure be cut off.
Based on technique scheme, the high pressure cut-off circuit that the embodiment of the present invention provides, pass through battery management
System and entire car controller two control device to cut off high pressure, when battery management system and car load
When some in controller breaks down, can select another controller that high pressure is cut off,
The optional method making the high pressure cut-off of system becomes more, does not haves and uses single control in prior art
Device cutoff high processed and this Single Controller break down after without the problem of additive method cutoff high.With
Time, owing to the method for high pressure cut-off becomes more, different controls can be selected according to when different scenes
Device processed realizes high pressure cut-off, makes no matter to can be carried out the fastest high pressure cut-off during in which kind of scene, anti-
Only high pressure cut-off problem not in time occurs.It addition, except using battery management system and entire car controller
Outward, can also cut off by extracting the maintenance switch in the system of being connected to or high-voltage connector in the present invention
High pressure, when battery manager and entire car controller all break down and cannot cutoff high time, still can lead to
Cross manual mode by the high pressure cut-off of system, further ensure the high-voltage safety of whole system.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to reality
Execute the required accompanying drawing used in example or description of the prior art to be briefly described, it should be apparent that below,
Accompanying drawing in description is only embodiments of the invention, for those of ordinary skill in the art, not
On the premise of paying creative work, it is also possible to obtain other accompanying drawing according to the accompanying drawing provided.
The structural representation of the high pressure cut-off circuit that Fig. 1 provides for the embodiment of the present invention；
Another structural representation of the high pressure cut-off circuit that Fig. 2 provides for the embodiment of the present invention；
Another structural representation of the high pressure cut-off circuit that Fig. 3 provides for the embodiment of the present invention；
The another structural representation of the high pressure cut-off circuit that Fig. 4 provides for the embodiment of the present invention；
The flow chart of the high pressure cut-off control method that Fig. 5 provides for the embodiment of the present invention；
Another flow chart of the high pressure cut-off control method that Fig. 6 provides for the embodiment of the present invention；
Another flow chart of the high pressure cut-off control method that Fig. 7 provides for the embodiment of the present invention；
Pure electric automobile high pressure cut-off during the switch fuse melt fusing that Fig. 8 provides for the embodiment of the present invention
Flow chart；
Pure electric automobile high pressure cut-off during the parts fused mass of fuse fusing that Fig. 9 provides for the embodiment of the present invention
Flow chart；
The another flow chart of the high pressure cut-off control method that Figure 10 provides for the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the present invention, and
It is not all, of embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
The every other embodiment obtained under creative work premise can be gone out, broadly fall into the scope of protection of the invention.
The structural representation of the high pressure cut-off circuit that Fig. 1 provides for the embodiment of the present invention, this high pressure cut-off electricity
Road can carry out selectable high pressure cut-off by non-Single Controller to system, it is preferred that all right
By extracting maintenance switch or arbitrary high-voltage connector realizes the high pressure cut-off of system.Implement in the present invention
In example, this high pressure cut-off circuit includes high tension loop and high pressure cut-off control circuit.
Wherein, described high tension loop includes high voltage component 13, the first relay 121 and the second relay 122,
Wherein, the first relay 121 is all connected with each described high voltage component 13 with the second relay 122；Remove
Outside this, described high tension loop also includes the first set of cells 111 and the second set of cells 112, the first relay
One end of 121 is connected with the positive pole of the first set of cells 111, and the other end is as the power current of described high tension loop
Pond bag positive terminal HV+；One end of second relay 122 is connected, separately with the negative pole of the second set of cells 112
One end as the electrokinetic cell bag negative pole end HV-of described high tension loop, the negative pole of the first set of cells 111 and
The positive pole of the second set of cells 112 is connected with maintenance switch 16 respectively.
It can be seen that the first set of cells 111 is connected with each high voltage component 13 by the first relay 121,
Second set of cells 112 is connected with each high voltage component 13 by the second relay 122, each high voltage component
The mode using parallel connection between 13 connects.
Wherein it is desired to it is emphasized that the first relay 121 includes the first contact 191, the second relay
Device 122 includes the second contact 192.When the first contact 191 and the second contact 192 all close, height pushes back
Road turns on, and pure electric automobile normally works, i.e. pure electric automobile exists high pressure；When the first contact 191 and/
Or second contact 192 disconnect, the i.e. first contact 191 disconnects, the second contact 192 disconnects or first touch
When point 191 and the second contact 192 all disconnect, high tension loop disconnects, and the high pressure of pure electric automobile is cut off.
Can select first to disconnect a contact in the first contact 191 and the second contact 192, then it is tactile to disconnect first
The mode of another contact in point 191 and the second contact 192 makes the high pressure of pure electric automobile be cut off,
So, the relay belonging to contact being disconnected after making cuts off without carrying, and is disconnected after being conducive to extending
The service life of relay belonging to contact.In addition to the first contact 191 and the second contact 192, first continues
Electrical equipment 121 and the second relay 122 all further comprises relay coil.
Wherein, described high pressure cut-off control circuit includes battery management system 14, entire car controller 15 and
Three relays 123, wherein, the 3rd relay 123 includes relay coil and the 3rd contact 193.Battery
Management system 14 is connected with the first relay 121 and the second relay 122, for controlling the first relay
The first contact 191 in 121 and/or the second contact 192 in the second relay 122 disconnect；Car load control
Device 15 processed is connected with the 3rd relay 123, for controlling the 3rd contact 193 in the 3rd relay 123
Disconnect；One end of 3rd relay 123 is connected with the magnitude of voltage power supply less than 36V, the first relay 121
It is connected with this magnitude of voltage power supply less than 36V by the 3rd relay 123 with the second relay 122.
Concrete, battery management system 14 is connected by the first outfan DO1 and the first relay 121,
It is connected by the second outfan DO2 and the second relay 121.First defeated when battery management system 14
It is conducted with going out to hold DO1 and chassis, and the second outfan DO2 of battery management system 14 and ground, chassis
When being conducted, pure electric automobile normally works；When battery management system 14 the first outfan DO1 with
The connection on ground, chassis disconnects, and the connection on the second outfan DO2 of battery management system 14 and chassis ground
During disconnection, the high pressure of pure electric automobile is cut off.
Concrete, entire car controller 15 is connected by digital output end Dout and the 3rd relay 123.
When the digital output end Dout output low level of entire car controller 15, the 3rd relay 123 receives
After the low level that the digital output end Dout of entire car controller 15 sends so that the 3rd contact 193 closes；
When the digital output end Dout of entire car controller 15 exports high level, the 3rd relay 123 receives
After the high level that the digital output end Dout of entire car controller 15 sends so that the 3rd contact 193 disconnects.
Concrete, one end of the 3rd relay 123 is connected with the low-tension supply of+12V, the first relay 121
It is connected with this+12V low-tension supply by the 3rd relay 123 with the second relay 122.Due to relay
When accessing low level, the contact of relay will close, and relay does not accesses low level, i.e. accesses high electricity
When putting down or do not access level, the characteristic that the contact of relay will be switched off；Therefore, close when the 3rd contact 193
Close, make the first relay 121 and the second relay 122 all turn on+12V low-tension supply, thus+12V
When low-tension supply gives the first relay 121 and the second relay 122 normal power supply, at battery management system
The first outfan DO1 and the second outfan DO2 of 14 is all normally connected with ground, chassis and all exports low electricity
On the premise of Ping, it will the first contact 191 and the second contact 192 are closed at；When the 3rd contact
193 disconnect, and make the connection all with+12V power supply of the first relay 121 and the second relay 122 cut off,
Thus+12V low-tension supply is when giving the power delivery termination of the first relay 121 and the second relay 122, first
Contact 191 and the second contact 192 simultaneously switch off.
In the present embodiment, there are battery management system 14 and 15 two controllers of entire car controller, solely
Vertical control battery management system 14, can cut off the high pressure of pure electric automobile, independent control entire car controller
15, the high pressure of pure electric automobile can also be cut off.When in battery management system 14 and entire car controller 15
Some when breaking down, can select another controller that the high pressure of pure electric automobile is cut
Disconnected, make the optional method of the high pressure cut-off of system become more, do not have and prior art uses list
One controller cutoff high and this Single Controller break down after asking without additive method cutoff high
Topic.Simultaneously as the method for high pressure cut-off becomes more, can select not according to when different scenes
With controller realize high pressure cut-off, make no matter to can be carried out the fastest high crush-cutting during in which kind of scene
Disconnected, prevent high pressure cut-off problem not in time from occurring.
Optionally, such as Fig. 2, on the basis of above-described embodiment, described high pressure cut-off circuit also includes: open
Close fuse 181 and parts fuse 182；Switch fuse 181 is placed in the interior of described maintenance switch 16
Portion, when by the electric current of maintenance switch 16 more than a setting, switch fuse 181 is by itself
Melt is fused by the heat produced, and makes the connection between the first set of cells 111 and the second set of cells 112 break
Opening, thus be disconnected high tension loop, the high pressure of pure electric automobile is cut off；One parts fuse 182
One end be connected with the first relay 121, the other end and high voltage component 13 are connected, when by certain
When the electric current of high voltage component 13 is more than a setting, the parts fuse being connected with this high voltage component 13
The melt fusing of 182, thus cut off the connection between the first set of cells 111 and this high voltage component 13, this height
The high pressure of splenium part 13 is cut off, and other high voltage components 13 the most normally work.
Switch fuse 181 is added, when the basic routing line of high pressure cut-off circuit occurs in high pressure cut-off circuit
When short circuit or overload, own melt is fused by switch fuse 181, makes high tension loop be cut off, thus
Cut off the high pressure of pure electric automobile, make pure electric automobile quit work, so, can be at high pressure cut-off electricity
When road is short-circuited or transships, immediately whole high pressure cut-off circuit is carried out effectively, protects reliably,
The use making system is the safest.
And the addition of parts fuse 182, then make system when only certain or certain several high voltage components 13
When being short-circuited or transship, only it is disconnected these high voltage components 13 being short-circuited or transshipping, and does not turns off
Whole high tension loop, make in this high pressure cut-off circuit other not be short-circuited or the high voltage component 13 that transships still
So can work on, it is ensured that the reliability of circuit.
Optionally, such as Fig. 3, in described high pressure cut-off control circuit, by battery management system 14 with whole
Vehicle control 15 connects, and makes battery management system 14 communicate with entire car controller 15.Such as,
When needs whole pure electric vehicle works, can be by entire car controller 15 to battery management system 14
Serve electricity instruction, so that battery management system 14 controls its first outfan DO1 and the second outfan
DO2 and the conducting on ground, chassis；Need to quit work when needs pure electric automobile and during cutoff high, can lead to
Cross entire car controller 15 and send lower electricity instruction to battery management system 14, so that battery management system 14
Control the disconnection of its first outfan DO1 and the second outfan DO2 and ground, chassis；The most such as, battery is worked as
Management system 14 detects when catastrophe failure occurs in battery system, and battery management system 14 controls to cut off height
After pressure, fault is reported entire car controller 15.
Concrete, it is connected by fieldbus between battery management system 14 with whole-control system 15,
The high end interface of communication by the high end interface CANH of communication of battery management system 14 Yu entire car controller 15
CANH is connected, by the low end interface CANL of communication of battery management system 14 and entire car controller 15
The low end interface CANL that communicates is connected.
By being attached between battery management system 14 and whole-control system 15, when any one in both
When monitoring the system failure, it will notify another immediately, make battery management system 14 and full-vehicle control system
Uniting, it is mutual, during so that system one breaks down to carry out information between 15 the two controllers well
Just can use immediately when this fault can the controller of more rapid and better cutoff high, ensure that circuit simultaneously
Reliability.As: when catastrophe failure occurs in vehicle, using entire car controller 15 to carry out cutoff high is
Good, and if entire car controller 15 is not detected by vehicle trouble, and battery management system 14 detects
Vehicle trouble, then the information of vehicle catastrophe failure is sent to entire car controller by battery management system 14 immediately
15, then, entire car controller 15 cuts off the high pressure of pure electric automobile.
It addition, use fieldbus to be attached between battery management system 14 and whole-control system 15,
Tradition 4-20mA analogue signal and the transmission of regular tap amount signal is instead of, by digitized with digital communication
The time division of communication, multiplex, reveal more, make battery management system 14 and entire car controller 15 it
Between information transmission the most reliable, too increase the reliability of circuit.
Preferably, such as Fig. 4, it is also possible to increase an interlock circuit in described high pressure cut-off circuit, described
Interlock circuit includes that maintenance switch 16 and high-voltage connector, a high-voltage connector insert in a high potential assembly
A mutual lock interface 17, maintenance switch 16 and described mutual lock interface 17 be in series connection, this interlocking electricity
Road is connected in series with entire car controller 15；3rd relay 123 is by described interlock circuit and described car load
Controller 15 is connected, when maintenance switch 16 or arbitrary high-voltage connector are pulled out, and the 3rd relay
Connection between 123 and entire car controller 15 is cut off so that the 3rd relay 123 cannot receive car load
The level information that controller 15 sends, when the 3rd relay 123 cannot receive entire car controller 15
During the level information gone out, the 3rd contact 193 can be made to disconnect, then cause the first contact 191 and second
Contact 192 disconnects, and then makes the high pressure of pure electric automobile be cut off.
3rd relay 123 is connected with described entire car controller 15 by described interlock circuit so that pure
Electric automobile when battery management system 14 all breaks down with 15 two controllers of whole-control system,
Still can carry out cutoff high by extracting maintenance switch 16 or high-voltage connector, further ensure whole system
The high-voltage safety of system.Meanwhile, when pure electric automobile needs to safeguard, and when attendant produces maloperation,
Use extracts maintenance switch 16 or high-voltage connector to disconnect high pressure as best practice.
Present invention also offers a kind of pure electric automobile, it is characterised in that include above-mentioned high pressure cut-off electricity
Road.
It addition, present invention also offers a kind of high pressure cut-off control method, based on above-mentioned high pressure cut-off electricity
Road, the high pressure cut-off control method provided the embodiment of the present invention below is introduced, height described below
Crush-cutting control method of breaking is based on above-described high pressure cut-off circuit, and this high pressure cut-off control method can be applied
In pure electric automobile, it is achieved the high pressure cut-off to pure electric automobile.
This high pressure cut-off control method includes:
Controlled the high pressure cut-off of pure electric automobile by battery management system 14, flow chart as it is shown in figure 5,
Concrete steps include:
Step S11: battery management system 14 controls the first contact 191 and/or the second contact 192 disconnects；
Step S12: high tension loop is because the first contact 191 and/or the second contact 192 disconnect and be cut off；
Step S13: the high pressure of pure electric automobile is cut off because of the cut-out of high tension loop.
Concrete, step S11 comprises the following steps:
Step S111: battery management system 14 controls the connection disconnection of the first outfan DO1 and ground, chassis；
Step S112: the first contact 191 disconnects；
Step S113: battery management system 14 controls the connection disconnection of the second outfan DO2 and ground, chassis；
Step S114: the second contact 192 disconnects.
Battery management system 14 can disconnect by only controlling the first contact 191, makes the first set of cells 111
Connection with each high voltage component 13 all disconnects, and makes high tension loop be cut off, so that pure electric automobile
High pressure be cut off.Can also disconnect by only controlling second contact 192, make the second set of cells 112 with
The connection of each high voltage component 13 all disconnects, and makes high tension loop be cut off, thus cuts off pure electric automobile
High pressure.Can also disconnect by controlling the first contact 191 and the second contact 192 all disconnect, make the
One set of cells 111 and the second set of cells 112 all disconnect with the connection of each high voltage component 13, make high pressure
Loop is cut off, thus the high pressure of pure electric automobile is cut off；And battery management system 14 controls first and touches
Point 191 disconnection and the second contact 192 all disconnect, and can be to control the first contact 191 first to disconnect, then control
Make the second contact 192 to disconnect, can be to control the second contact 192 first to disconnect, then control the first contact 192
Disconnect, it is also possible to simultaneously switch off for controlling the first contact 191 and the second contact 192.
The first contact 191 is only controlled or only to control the method for the second contact 192 pure to realize if selecting to use
The cut-out of electric automobile high-voltage, after the first contact 191 or the second contact 192 are disconnected, although permissible
Disconnect high tension loop, make the high pressure of pure electric automobile be cut off, but, due to the high pressure in high tension loop
Parts 13 are still connected with a group in the first set of cells 111 and the second set of cells 112, system now
Yet suffering from the risk that high pressure is not completely severed, system yet suffers from potential safety hazard.And if selecting to use
The method that battery management system 14 controls the first contact 191 and the second contact 192 all disconnects is to cut off pure electricity
The high pressure of electrical automobile, all disconnects the first contact 191 and the second contact 192, makes the height in high tension loop
Splenium part 13 all disconnects with the connection of the first set of cells 111 and the second set of cells 112, then can ensure that and be
The high pressure of system is completely severed, and makes above-mentioned potential safety hazard no longer exist.Therefore, than only controlling first
Contact 191 or only control the second contact 192 to the method realizing pure electric automobile high pressure cut-off, uses control
Make the first contact 191 and the second contact 192 all disconnects the method peace realizing pure electric automobile high pressure cut-off
Overall coefficient is higher.
Meanwhile, use battery management system 14 is being selected to control the first contact 191 and the second contact 192
In the case of all disconnection realizes the method for pure electric automobile high pressure cut-off, select first to disconnect the first contact 191
With a contact in the second contact 192, then disconnect in the first contact 191 and the second contact 192 another
The mode of one contact, simultaneously switches off the method for the first contact 191 and the second contact 192 more preferably than it.
Because, after first disconnecting a contact in the first contact 191 and the second contact 192, the first contact 191
Will be in without the state carried with another contact in the second contact 192, now, then by this contact
Disconnecting, this contact is to cut off without carrying, the use longevity being beneficial to extension device without load cut-out of equipment
Life.
Controlled the high pressure cut-off of pure electric automobile by entire car controller 15, flow chart as shown in Figure 6,
Concrete steps include:
Step S21: entire car controller 15 controls the 3rd contact 193 and disconnects；
Step S22: the company between the first relay 121 and the second relay 122 and+12V low-tension supply
Connect and simultaneously switch off；
Step S23: when accessing low level due to relay, the contact of relay will close, and relay is not
Access low level, when i.e. accessing high level or do not access level, the characteristic that the contact of relay will be switched off,
Also will in the first contact 191 in first relay 121 and the second contact 192 in the second relay 122
Simultaneously switch off；
Step S24: high tension loop is because the first contact 191 and the second contact 192 disconnect and be cut off；
Step S25: the high pressure of pure electric automobile is cut off because of the cut-out of high tension loop.
Concrete, step S21 comprises the following steps:
Step S211: entire car controller 15 digital output end Dout exports high level；
Step S212: the 3rd relay 123 receives after the high level of entire car controller 15 output,
Control the 3rd contact 193 to disconnect.
Battery management system 14 and 15 two controllers of entire car controller are used to carry out the height to pure electric automobile
Pressure is cut off, independently controlled battery management system 14 and independently controlled entire car controller 15,
Normally to cut off the high pressure of pure electric automobile.When in battery management system 14 and entire car controller 15
When any one breaks down, the high crush-cutting of pure electric automobile can be controlled by another controller of reselection
Disconnected, make the optional method of the high pressure cut-off of pure electric automobile become more, eliminate in prior art and make
By Single Controller cutoff high, this Single Controller can cutoff high without additive method after breaking down
Problem.Simultaneously as the method for high pressure cut-off becomes more, can select according to when different scenes
Select different controllers to control high pressure cut-off, make no matter to can be carried out the fastest height during in which kind of scene
Crush-cutting breaks, and prevents the generation of high pressure cut-off problem not in time.
Preferably, described high pressure cut-off control method also includes:
By extracting maintenance switch 16 or arbitrary high-voltage connector realizes the high pressure cut-off of pure electric automobile,
Flow chart is as it is shown in fig. 7, concrete steps include:
Step S31: extract maintenance switch 16 or arbitrary high-voltage connector；
Step S32: the 3rd relay 123 disconnects with the connection of entire car controller 15；
Step S33: the 3rd relay is controlled because of not receiving level information that entire car controller 15 sends
Make the 3rd contact 193 to disconnect；
Step S34: the first relay 121 and the second relay 122 are same with the connection of+12V low-tension supply
Time disconnect；
Step S35: the first contact 191 because the first relay 121 without+12V low-tension supply power supply and
Disconnecting, the second contact 192 is because the second relay 122 disconnects without the power supply of+12V low-tension supply；
Step S36: high tension loop is because the first contact 191 and the second contact 192 disconnect and be cut off；
Step S37: the high pressure of pure electric automobile is cut off because of the cut-out of high tension loop.
By extracting maintenance switch 16 or arbitrary high-voltage connector realizes the high pressure cut-off of pure electric automobile
Method in, it is not necessary to use the high pressure cut-off that can realize pure electric automobile to any controller.As
This so that is when pure electric automobile is equal at battery management system 14 and 15 two controllers of whole-control system
When breaking down, still can cut off height by the method extracting maintenance switch 16 or arbitrary high-voltage connector
Pressure, further ensures the high-voltage safety of whole system.Meanwhile, when pure electric automobile needs to safeguard,
And attendant is when producing maloperation, uses and extract maintenance switch 16 or arbitrary high-voltage connector to disconnect height
Pressure is best practice.
It addition, Fig. 8 shows the stream of pure electric automobile high pressure cut-off when switch fuse 181 melt fuses
Cheng Tu, concrete steps include:
Step S41: the melt fusing of switch fuse 181；
Step S42: the connection between the first set of cells 111 and the second set of cells 112 disconnects；
Step S43: high tension loop is because the connection between the first set of cells 111 and the second set of cells 112 is broken
Open and be cut off；
Step S44: the high pressure of pure electric automobile is cut off because of the cut-out of high tension loop.
When short circuit or overload fault occurs in the backbone in high tension loop, make the electricity by maintenance switch 16
When stream is more than a setting, the melt of the switch fuse 181 being arranged in maintenance switch 16 will be certainly
Dynamic fusing, makes the connection between the first set of cells 111 and the second set of cells 112 disconnect, i.e. high tension loop
Disconnect, thus the high pressure of pure electric automobile is cut off, make high pressure cut-off circuit be short-circuited or transship former
During barrier, whole high pressure cut-off circuit can be carried out effectively, protect reliably by system immediately, makes system
Use the safest.
Equally, Fig. 9 shows the high-voltage section that parts fuse 182 melt is connected when fusing with this fuse
The flow chart that part high pressure is cut-off, concrete steps include:
Step S51: the melt fusing of parts fuse 182；
Step S52: the high voltage component 13 that the first set of cells 111 is connected with this parts fuse 182
Connect and disconnect；
Step S53: be cut off with the high pressure of this connected high voltage component 13 of parts fuse 182；
When short circuit or overload fault occurs in the service main of certain connected high tension loop of high voltage component 13, make
During by the electric current of this high voltage component 13 more than a setting, the parts being connected with this high voltage component 13
The melt of fuse 182 will fuse automatically, thus cuts off the first set of cells 111 and this high voltage component 13
Between connection, make the high pressure of this high voltage component 13 be cut off, and in addition to this high voltage component 13, height pushes back
Other equipment on road and be not short-circuited or the high voltage component of overload fault 13 all can normally work, protect
Demonstrate,prove the reliability of circuit.
Preferably, as shown in Figure 10, when pure electric automobile breaks down, entire car controller can be passed through
15 to battery management system 14 to transmit information to make battery management system 14 be pressed into the height of pure electric automobile
Row cuts off, and concretely comprises the following steps:
Step S61: entire car controller 15 detects that pure electric car breaks down；
Step S62: entire car controller 15 sends lower electricity instruction to battery management system 14；
Concrete, it is possible to use battery management system 14 is entered by fieldbus with whole-control system 15
Row connects, and uses fieldbus, instead of tradition 4-20mA analogue signal and regular tap with digital communication
More the transmission of amount signal, by the time division of digitized communication, multiplex, reveal, make battery management system
Information transmission between system 14 and entire car controller 15 is the most reliable, too increases the reliability of circuit.
Step S63: battery management system 14 controls the high pressure of pure electric automobile and cut after receiving lower electricity instruction
Disconnected.
Wherein, the battery management system 14 in step S63 has controlled the method for pure electric automobile high pressure cut-off
Through embodiment being given above, will not be described in great detail herein.
Same, when pure electric automobile breaks down, it is also possible to give car load by battery management system 14
Controller 15 transmits information to make entire car controller 15 cut off the high pressure of pure electric automobile；Specifically
, when battery management system 14 detects that pure electric automobile breaks down, by fieldbus by fault
Information conveys to entire car controller 15, and entire car controller 15 carries out high pressure cut-off to pure electric automobile again, whole
Vehicle controller 15 controls the method for pure electric automobile high pressure cut-off and is the most given in embodiment above, this
Place also repeats no more.So, can make in battery management system 14 and 15 two controllers of entire car controller
Any one when monitoring the system failure, all can notify another immediately, making can between two controllers
Carry out information well mutual, so that system can use the energy when this fault in time breaking down immediately
More rapid and better the controller of cutoff high carrys out cutoff high, also ensure that the reliability of circuit simultaneously.
Generally, when pure electric automobile needs cutoff high because wanting to quit work, or because of
When occurring that catastrophe failure needs cutoff high for battery system, battery management system 14 is selected to control pure
The high pressure cut-off of electric automobile, than additive method, it is possible to use less the time is by pure electric automobile
High pressure cut-off；When needing cutoff high when catastrophe failure occurs in vehicle, use entire car controller 15
Control the high pressure cut-off of pure electric automobile more preferably；And as user or attendant's maloperation, then can lead to
Cross and extract maintenance switch 16 or arbitrary high-voltage connector to cut off the high pressure of pure electric automobile.
In this specification, each embodiment uses the mode gone forward one by one to describe, and each embodiment stresses
Being the difference with other embodiments, between each embodiment, identical similar portion sees mutually.
For device disclosed in embodiment, owing to it corresponds to the method disclosed in Example, so describing
Fairly simple, relevant part sees method part and illustrates.State in the disclosed embodiments
Bright, make professional and technical personnel in the field be capable of or use the present invention.Multiple to these embodiments is repaiied
Change and will be apparent from for those skilled in the art, generic principles defined herein
Can realize in other embodiments without departing from the spirit or scope of the present invention.Therefore,
The present invention is not intended to be limited to the embodiments shown herein, and is to fit to disclosed herein
Principle and the consistent the widest scope of features of novelty.
Claims (9)
1. the high pressure cut-off circuit for pure electric automobile, it is characterised in that include high tension loop and
High pressure cut-off control circuit,
Described high tension loop includes high voltage component, the first relay and the second relay；Wherein, described
One relay is all connected with each described high voltage component with described second relay, described first relay bag
Including the first contact, described second relay includes the second contact；
Described high pressure cut-off control circuit includes battery management system, entire car controller and the 3rd relay；
Described battery management system is connected with described first relay and described second relay, described full-vehicle control
Device is connected with described 3rd relay, one end of described 3rd relay and the voltage electricity less than 36 volts
Source is connected, and described first relay and described second relay are by described 3rd relay and described power supply
It is connected；
Also including: interlock circuit, described interlock circuit includes maintenance switch and high-voltage connector, an institute
Stating high-voltage connector and insert in a mutual lock interface of a described high voltage component, described maintenance switch is with all
Described interlocking interface tandem connects；Described 3rd relay is by described interlock circuit and described full-vehicle control
Device is connected.
High pressure cut-off circuit the most according to claim 1, it is characterised in that described high pressure cut-off electricity
Road also includes: switch fuse and parts fuse；Described switch fuse is placed in described maintenance switch
Inside, a described parts fuse one end is connected with described first relay, described in the other end and one
High voltage component is connected.
High pressure cut-off circuit the most according to claim 1, it is characterised in that described battery management system
Unite and be connected by the first outfan and the first relay, be connected by the second outfan and the second relay.
High pressure cut-off circuit the most according to claim 1, it is characterised in that described battery management system
The high end interface that communicates of system is connected by fieldbus end interface high with the communication of described entire car controller, institute
State the low end interface communication low side by fieldbus with described entire car controller that communicates of battery management system
Interface is connected.
5. a pure electric automobile, it is characterised in that include the height described in any one of Claims 1-4
Crush-cutting deenergizing.
6. a high pressure cut-off control method, it is characterised in that based on any one of Claims 1-4 institute
The high pressure cut-off circuit stated, this high pressure cut-off control method includes:
Battery management system controls the first contact and/or the second contact and disconnects, and high tension loop disconnects, pure electronic
The high pressure of automobile is cut off；
Vehicle control unit controls the 3rd contact disconnects, and makes the first relay and the second relay be less than with voltage
The power supply of 36 volts connects disconnection, thus the first contact and the second contact disconnect, and high tension loop disconnects,
The high pressure of pure electric automobile is cut off.
High pressure cut-off control method the most according to claim 6, it is characterised in that described cell tube
Reason system control the first contact and the second contact disconnect particularly as follows:
Battery management system controls the connection disconnection of the first outfan and ground, chassis, and the first contact disconnects；
Battery management system controls the connection disconnection of the second outfan and ground, chassis, and the second contact disconnects.
High pressure cut-off control method the most according to claim 6, it is characterised in that described car load control
Device processed controls the 3rd contact and disconnects particularly as follows: entire car controller output high level, and the 3rd contact disconnects.
High pressure cut-off control method the most according to claim 6, it is characterised in that described high crush-cutting
Disconnected control method also includes:
Extracting maintenance switch or arbitrary high-voltage connector, the 3rd relay disconnects with the connection of entire car controller,
3rd contact disconnects, thus the first contact and the second contact disconnect, and high tension loop disconnects, pure electric automobile
High pressure be cut off.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410457767.7A CN104149629B (en) | 2014-09-10 | 2014-09-10 | A kind of pure electric automobile and high pressure cut-off circuit thereof and high pressure cut-off control method |
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| CN201410457767.7A CN104149629B (en) | 2014-09-10 | 2014-09-10 | A kind of pure electric automobile and high pressure cut-off circuit thereof and high pressure cut-off control method |
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| CN104149629B true CN104149629B (en) | 2016-08-31 |
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| CN105539156B (en) * | 2015-12-15 | 2018-03-27 | 北汽福田汽车股份有限公司 | High-voltage control circuit, method and automobile |
| CN107487183B (en) * | 2016-07-18 | 2020-08-28 | 宝沃汽车（中国）有限公司 | On-off control method and system of high-voltage loop and electric vehicle |
| CN109466373A (en) * | 2018-11-30 | 2019-03-15 | 北京长城华冠汽车科技股份有限公司 | The cell managing device and vehicle of vehicle |
| CN110053514A (en) * | 2019-03-08 | 2019-07-26 | 北京长城华冠汽车科技股份有限公司 | Electric vehicle and its high-voltage control circuit |
| CN112895903B (en) * | 2021-02-22 | 2022-10-11 | 恒大新能源汽车投资控股集团有限公司 | High-voltage cut-off control system and high-voltage cut-off control method for electric automobile |
| CN114750594B (en) * | 2022-04-29 | 2024-06-04 | 深蓝汽车科技有限公司 | Battery system and vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3346910B2 (en) * | 1994-10-03 | 2002-11-18 | 本田技研工業株式会社 | Power supply for electric vehicles |
| CN102029914B (en) * | 2010-11-29 | 2013-07-24 | 北京汽车新能源汽车有限公司 | Electric automobile high-voltage safety device and control method |
| CN102490615A (en) * | 2011-11-28 | 2012-06-13 | 金龙联合汽车工业（苏州）有限公司 | High-voltage safety protection device for electrodynamic force automobile |
| CN102837617B (en) * | 2012-09-17 | 2015-04-29 | 奇瑞汽车股份有限公司 | Power-off control method and device for high-voltage system of electric automobile |
| CN103072485A (en) * | 2013-01-16 | 2013-05-01 | 惠州市亿能电子有限公司 | High-voltage interlocking circuit of electric automobile |
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Application publication date: 20141119 Assignee: CHONGQING CHANGAN NEW ENERGY AUTOMOBILE TECHNOLOGY Co.,Ltd. Assignor: Chongqing Changan Automobile Co.,Ltd.|CHONGQING CHANG'AN NEW ENERGY AUTOMOBILE Co.,Ltd. Contract record no.: 2018500000022 Denomination of invention: Pure electric automobile and high voltage cutoff circuit and high voltage cutoff control method thereof Granted publication date: 20160831 License type: Exclusive License Record date: 20181130 |
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Effective date of registration: 20190104 Address after: 401133 room 208, 2 house, 39 Yonghe Road, Yu Zui Town, Jiangbei District, Chongqing Patentee after: CHONGQING CHANGAN NEW ENERGY AUTOMOBILE TECHNOLOGY Co.,Ltd. Address before: 400023, No. 260, Jianxin East Road, Jiangbei District, Chongqing Co-patentee before: CHONGQING CHANG'AN NEW ENERGY AUTOMOBILE Co.,Ltd. Patentee before: Chongqing Changan Automobile Co.,Ltd. |
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Address after: 401133 room 208, 2 house, 39 Yonghe Road, Yu Zui Town, Jiangbei District, Chongqing Patentee after: Deep Blue Automotive Technology Co.,Ltd. Address before: 401133 room 208, 2 house, 39 Yonghe Road, Yu Zui Town, Jiangbei District, Chongqing Patentee before: CHONGQING CHANGAN NEW ENERGY AUTOMOBILE TECHNOLOGY Co.,Ltd. |
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