CN104149629A - Pure electric automobile and high voltage cutoff circuit and high voltage cutoff control method thereof - Google Patents
Pure electric automobile and high voltage cutoff circuit and high voltage cutoff control method thereof Download PDFInfo
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- CN104149629A CN104149629A CN201410457767.7A CN201410457767A CN104149629A CN 104149629 A CN104149629 A CN 104149629A CN 201410457767 A CN201410457767 A CN 201410457767A CN 104149629 A CN104149629 A CN 104149629A
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Abstract
The invention provides a high voltage cutoff circuit of a pure electric automobile. The high voltage cutoff circuit comprises a high voltage loop and a high voltage cutoff control circuit, wherein the high voltage loop comprises high voltage components, a first relay and a second relay; both the first relay and the second relay are connected with each high voltage component; the first relay comprises a first contact; the second relay comprises a second contact; the high voltage cutoff control circuit comprises a battery management system, a whole automobile controller and a third relay; the battery management system is connected with the first relay and the second relay; the whole automobile controller is connected with the third relay; one end of the third relay is connected with a power supply of which the voltage is lower than 36 V; the first relay and the second relay are connected with the power supply through the third relay. The invention further provides the pure electric automobile with the high voltage cutoff circuit, and a high voltage cutoff control method based on the high voltage cutoff circuit.
Description
Technical field
The present invention relates to high pressure control field, particularly relate to a kind of high pressure cut-off circuit.In addition, the invention still further relates to a kind of control method for above-mentioned high pressure cut-off circuit and a kind of pure electric automobile that comprises above-mentioned high pressure cut-off circuit.
Background technology
Along with expanding economy, the energy and environmental issue become increasingly conspicuous, and countries in the world have all turned one's attention to environmental protection and energy-conservation pure electric automobile, a high tension loop that important feature is exactly the in-built guaranteed enough tractive performancies of car of pure electric automobile.
And the normal working voltage of high tension loop is up to several hectovolts, exceeded the safety voltage of 36 volts of human bodies far away, therefore, be protection personal safety, at pure electric automobile, quit work, all need the high pressure cut-off in car when maintenance and trouble-shooting.Meanwhile, owing to containing a large amount of powerful devices in pure electric automobile, the curent change in power circuit is violent, and extremely short control lag and interference all may cause great infringement to the whole Circuits System of pure electric automobile.Therefore, this just requires pure electric automobile can carry out promptly high pressure cut-off within a short period of time, with bondsman's life security and the running environment of vehicle.
The high pressure cut-off circuit of conventional pure electric automobile, adopts Single Controller to carry out high pressure cut-off.With Single Controller, carry out cut off high, when system needs cut off high, system is except selecting this Single Controller to come cut off high, there is no other selection, when aging or this Single Controller occurs for this Single Controller, there is response not in time etc. during situation, increased to a great extent circuit high pressure cut-off possibility not in time.Meanwhile, if use Single Controller, when this Single Controller has occurred fault in pure electric automobile use procedure, in the time of cannot normally working again, by can be used to cut off again the high pressure of this pure electric automobile without other optional methods, there is high potential safety hazard.
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 pressure cut-off control method, to solve the high-voltage safety potential problem that uses Single Controller in prior art and cause.
For achieving the above object, the embodiment of the present invention provides following technical scheme:
For a high pressure cut-off circuit for pure electric automobile, comprise high tension loop and high pressure cut-off control circuit,
Wherein, described high tension loop comprises high voltage component, the first relay and the second relay;
Wherein, described the first relay is all connected with high voltage component described in each with described the second battery pack, and described the first relay comprises the first contact, and described the second relay comprises the second contact;
Described high pressure cut-off control circuit comprises battery management system, entire car controller and the 3rd relay;
Wherein, described battery management system is connected with described the second relay with described the first relay, for controlling described the first contact and described the second contact disconnection;
Described entire car controller is connected with described the 3rd relay, for controlling the 3rd contact of the 3rd relay, disconnects;
One end of described the 3rd relay and voltage are less than the power supply of 36 volts and are connected, described the first relay is connected with described power supply by described the 3rd relay with described the second relay, when described the 3rd contact disconnects, described the first relay and described the second relay were cut off with being connected of described power supply, and the first contact and the second contact disconnect.
Wherein, described high pressure cut-off circuit also comprises: interlock circuit, described interlock circuit comprises maintenance switch and high-voltage connector, a described high-voltage connector inserts in an interlocking interface of a described high potential assembly, described maintenance switch is connected with all described interlocking interface tandems, and described interlock circuit and described entire car controller are connected in series; Described the 3rd relay is connected with described entire car controller by described interlock circuit.
Wherein, described high pressure cut-off circuit also comprises: switch fuse and parts fuse;
Described switch fuse is placed in the inside of described maintenance switch;
A described parts fuse one end is connected with described the first relay, and the other end is connected with a described high voltage component.
Wherein, described battery management system is connected with the first relay by the first mouth, by the second mouth, is connected with the second relay.
Wherein, the high end interface of communication of described battery management system is connected with the high end interface of communication of described entire car controller by fieldbus, and the low end interface of communication of described battery management system is connected with the low end interface of communication of described entire car controller by fieldbus.
A pure electric automobile, comprises the high pressure cut-off circuit described in above-mentioned any one.
A high pressure cut-off control method, the high pressure cut-off circuit based on described in above-mentioned any one, this high pressure cut-off control method comprises:
Battery management system controls the first contact and/or the second contact disconnects, and high tension loop disconnects, and the high pressure of pure electric automobile is cut off;
Vehicle control unit controls the 3rd contact disconnects, and the power supply that makes the first relay and the second relay and voltage be less than 36 volts is connected disconnection, thereby the first contact and the second contact disconnect, and high tension loop disconnects, and the high pressure of pure electric automobile is cut off.
Wherein, described battery management system is controlled the first contact and the second contact and is disconnected and being specially:
Battery management system is controlled disconnections that be connected on the first mouth and chassis ground, the first contact disconnection;
Battery management system is controlled disconnections that be connected on the second mouth and chassis ground, the second contact disconnection.
Wherein, described vehicle control unit controls the 3rd contact disconnects and being specially: entire car controller output high level, the 3rd contact disconnects.
Wherein, described high pressure cut-off control method also comprises:
Extract maintenance switch or arbitrary high-voltage connector, the disconnection that is connected of the 3rd relay and entire car controller, the 3rd contact disconnects, thus the first contact and the second contact disconnect, and high tension loop disconnects, and the high pressure of pure electric automobile is cut off.
Based on technique scheme, the high pressure cut-off circuit that the embodiment of the present invention provides, by battery management system and two control setups of entire car controller, high pressure is cut off, during some breaking down in battery management system and entire car controller, can select another controller to cut off high pressure, make system high pressure cut-off can system of selection become more, can not deposit use in the prior art Single Controller cut off high and this Single Controller break down after without the problem of additive method cut off high.Meanwhile, because the method for high pressure cut-off becomes more, can be according to selecting different controllers to realize high pressure cut-off when the different scenes, make, no matter can carry out the fastest high pressure cut-off when which kind of scene, to prevent that high pressure cut-off problem not in time from occurring.In addition, except using battery management system and entire car controller, can also carry out cut off high by maintenance switch or the high-voltage connector of extracting in the system of being connected in the present invention, when battery manager and entire car controller all break down and cannot cut off highs, still can, by manual mode by the high pressure cut-off of system, further guarantee the high-voltage safety of whole system.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skills, do not paying under the prerequisite of creative work, other accompanying drawing can also be provided according to the accompanying drawing providing.
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;
A structural representation again 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 diagram of circuit of the high pressure cut-off control method that Fig. 5 provides for the embodiment of the present invention;
Another diagram of circuit of the high pressure cut-off control method that Fig. 6 provides for the embodiment of the present invention;
A diagram of circuit again of the high pressure cut-off control method that Fig. 7 provides for the embodiment of the present invention;
The diagram of circuit of pure electric automobile high pressure cut-off when the switch fuse melt that Fig. 8 provides for the embodiment of the present invention fuses;
The diagram of circuit of pure electric automobile high pressure cut-off when the parts fused mass of fuse that Fig. 9 provides for the embodiment of the present invention fuses;
The another diagram of circuit of the high pressure cut-off control method that Figure 10 provides for the embodiment of the present invention.
The specific embodiment
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 clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills can go out the every other embodiment obtaining under creative work prerequisite not doing, and all belong to 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 circuit can carry out selectable high pressure cut-off to system by non-Single Controller, preferably, can also realize by extracting maintenance switch or arbitrary high-voltage connector the high pressure cut-off of system.In embodiments of the present invention, this high pressure cut-off circuit comprises high tension loop and high pressure cut-off control circuit.
Wherein, described high tension loop comprises high voltage component 13, the first relays 121 and the second relay 122, and wherein, the first relay 121 is all connected with high voltage component described in each 13 with the second relay 122; In addition, described high tension loop also comprises that one end of the first battery pack 111 and the second battery pack 112, the first relays 121 is connected with the positive pole of the first battery pack 111, and the other end is as the electrokinetic cell bag positive terminal HV+ of described high tension loop; One end of the second relay 122 is connected with the negative pole of the second battery pack 112, and the other end is as the electrokinetic cell bag negative pole end HV-of described high tension loop, and the positive pole of the negative pole of the first battery pack 111 and the second battery pack 112 is connected with maintenance switch 16 respectively.
Can find out, the first battery pack 111 is connected with each high voltage component 13 by the first relay 121, and the second battery pack 112 is connected with each high voltage component 13 by the second relay 122, between each high voltage component 13, adopts mode in parallel to connect.
Wherein, it needs to be noted, the first relay 121 comprises that the first contact 191, the second relays 122 comprise the second contact 192.When the first contact 191 and the second contact 192 are all closed, high tension loop conducting, pure electric automobile is normally worked, and there is high pressure in pure electric automobile; When the first contact 191 and/or the second contact 192 disconnections, i.e., when the first contact 191 disconnections, the second contact 192 disconnections or the first contact 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, the mode that disconnects again another contact in the first contact 191 and the second contact 192 is cut off the high pressure of pure electric automobile, so, relay under the contact being disconnected after can making is not with to carry and is cut off, and is conducive to be disconnected after extending the service life of the affiliated relay in contact.Except the first contact 191 and the second contact 192, in the first relay 121 and the second relay 122, all also comprised relay coil.
Wherein, described high pressure cut-off control circuit comprises battery management system 14, entire car controller 15 and the 3rd relay 123, and wherein, the 3rd relay 123 comprises relay coil and the 3rd contact 193.Battery management system 14 is connected with the second relay 122 with the first relay 121, for controlling the first contact 191 of the first relay 121 and/or the second contact 192 in the second relay 122, disconnects; Entire car controller 15 is connected with the 3rd relay 123, for controlling the 3rd contact 193 of the 3rd relay 123, disconnects; One end of the 3rd relay 123 is connected with the power supply that magnitude of voltage is less than 36V, and the first relay 121 is connected with the power supply that this magnitude of voltage is less than 36V by the 3rd relay 123 with the second relay 122.
Concrete, battery management system 14 is connected with the first relay 121 by the first mouth DO1, by the second mouth DO2, is connected with the second relay 121.When the first mouth DO1 of battery management system 14 and chassis be conducted, and the second mouth DO2 of battery management system 14 and chassis while being conducted, pure electric automobile is normally worked; Disconnections that be connected when the first mouth DO1 of battery management system 14 and ground, chassis, and the second mouth DO2 of battery management system 14 and ground, chassis be connected disconnection time, the high pressure of pure electric automobile is cut off.
Concrete, entire car controller 15 is connected with the 3rd relay 123 by digital output end Dout.When the digital output end Dout of entire car controller 15 output low level, the 3rd relay 123 receives after the low level that the digital output end Dout of entire car controller 15 sends, and makes the 3rd contact 193 closures; When the digital output end Dout output high level of entire car controller 15, the 3rd relay 123 receives after the high level that the digital output end Dout of entire car controller 15 sends, and the 3rd contact 193 is disconnected.
Concrete, one end of the 3rd relay 123 is connected with the low potential source of+12V, the first relay 121 and the second relay 122 by the 3rd relay 123 with this+12V low potential source is connected.During due to relay access low level, the contact of relay is by closure, and relay does not access low level, and when accessing high level or not accessing level, the contact of relay is by the characteristic disconnecting; Therefore, when the 3rd contact 193 closures, make the first relay 121 and the second relay 122 all with+12V low potential source conducting, when thereby+12V low potential source is given the first relay 121 and the second relay 122 supply regular power, at the first mouth DO1 of battery management system 14, be all normally connected with ground, chassis with the second mouth DO2 and all under the prerequisite of output low level, will make the first contact 191 and the second contact 192 closure simultaneously; When the 3rd contact 193 disconnects, make the first relay 121 and the second relay 122 all with the cut-out that is connected of+12V power supply, when thereby+12V low potential source stops to the power supply of the first relay 121 and the second relay 122, the first contact 191 and the second contact 192 disconnect simultaneously.
In the present embodiment, there are 15 two controllers of battery management system 14 and entire car controller, independently control battery management system 14, can cut off the high pressure of pure electric automobile, independently control entire car controller 15, can also cut off the high pressure of pure electric automobile.During some breaking down in battery management system 14 and entire car controller 15, can select another controller to cut off the high pressure of pure electric automobile, make system high pressure cut-off can system of selection become more, can not deposit use in the prior art Single Controller cut off high and this Single Controller break down after without the problem of additive method cut off high.Meanwhile, because the method for high pressure cut-off becomes more, can be according to selecting different controllers to realize high pressure cut-off when the different scenes, make, no matter can carry out the fastest high pressure cut-off when which kind of scene, to prevent that high pressure cut-off problem not in time from occurring.
Optionally, as Fig. 2, on the basis of above-described embodiment, described high pressure cut-off circuit also comprises: switch fuse 181 and parts fuse 182; Switch fuse 181 is placed in the inside of described maintenance switch 16, when the electric current by maintenance switch 16 surpasses a specified value, the heat that switch fuse 181 produces by itself fuses melt, make the disconnection that is connected between the first battery pack 111 and the second battery pack 112, thereby disconnected high tension loop, the high pressure of pure electric automobile is cut off; One end of a parts fuse 182 is connected with the first relay 121, the other end is connected with a high voltage component 13, when the electric current by certain high voltage component 13 surpasses a specified value, the melt fusing of the parts fuse 182 being connected with this high voltage component 13, thereby cut-out the first battery pack 111 is connected with 13 of this high voltage components, the high pressure of this high voltage component 13 is cut off, and other high voltage components 13 are still normally worked.
In high pressure cut-off circuit, add switch fuse 181; when the basic routing line of high pressure cut-off circuit is short-circuited or transships; switch fuse 181 is by self melt fusing; high tension loop is cut off, thereby cuts off the high pressure of pure electric automobile, pure electric automobile is quit work; so; can be when high pressure cut-off circuit be short-circuited or transships, immediately to whole high pressure cut-off circuit carry out effectively, failure-free protection, make the use of system more safe.
And the adding of parts fuse 182, make system when only having certain or certain several high voltage components 13 be short-circuited or transship, these high voltage components 13 that are short-circuited or transship have only been disconnected, and do not disconnect whole high tension loop, the high voltage component 13 that makes in this high pressure cut-off circuit other not be short-circuited or transship still can work on, and has guaranteed the reliability of circuit.
Optionally, as Fig. 3, in described high pressure cut-off control circuit, battery management system 14 is connected with whole-control system 15, battery management system 14 and entire car controller 15 are communicated.For example, when needs pure electric automobile car load is worked, can to battery management system 14, send the instruction that powers on by entire car controller 15, thereby make battery management system 14 control the conducting on its first mouth DO1 and the second mouth DO2 and ground, chassis; When needs pure electric automobile need to quit work and during cut off high, can send lower electric instruction to battery management system 14 by entire car controller 15, thereby make battery management system 14 control the disconnection on its first mouth DO1 and the second mouth DO2 and ground, chassis; Again for example, when battery management system 14 detects battery system and occurs major failure, battery management system 14 is controlled after cut off highs, and fault is reported to entire car controller 15.
Concrete, between battery management system 14 and whole-control system 15, by fieldbus, be connected, the high end interface CANH of the communication of battery management system 14 is connected with the high end interface CANH of communication of entire car controller 15, the low end interface CANL of the communication of battery management system 14 is connected with the low end interface CANL of communication of entire car controller 15.
15 of battery management system 14 and whole-control systems are connected, when any in both monitors the system failure, another will be notified immediately, make can carry out well information interaction between battery management system 14 and whole-control system 15 these two controllers, thereby make system when breaking down, can use immediately the controller of faster and better ground of energy cut off high when this fault, guaranteed the reliability of circuit simultaneously.As: when there is major failure in vehicle, it is best with entire car controller 15, carrying out cut off high, and if entire car controller 15 does not detect vehicle trouble, and battery management system 14 has detected vehicle trouble, battery management system 14 sends to entire car controller 15 by the information of vehicle major failure immediately, then, entire car controller 15 cuts off the high pressure of pure electric automobile.
In addition, 15 of battery management system 14 and whole-control systems, use fieldbus to be connected, with digital communication, substituted the transmission of traditional 4-20mA analog signal and regular tap amount signal, by the time division of digitalisation communication, multiplex, multiple spot, make the information transmission between battery management system 14 and entire car controller 15 more reliable, also increased the reliability of circuit.
Preferably, as Fig. 4, can also in described high pressure cut-off circuit, increase an interlock circuit, described interlock circuit comprises maintenance switch 16 and high-voltage connector, a high-voltage connector inserts in an interlocking interface 17 of a high potential assembly, maintenance switch 16 is in series and is connected with described interlocking interface 17, and this interlock circuit and entire car controller 15 are connected in series; The 3rd relay 123 is connected with described entire car controller 15 by described interlock circuit, when maintenance switch 16 or arbitrary high-voltage connector are pulled out, the 3rd relay 123 was cut off with being connected of 15 of entire car controllers, make the 3rd relay 123 cannot receive the level information that entire car controller 15 sends, when the 3rd relay 123 cannot receive the level information that entire car controller 15 sends, can make the 3rd contact 193 disconnect, then cause the first contact 191 and the second contact 192 to disconnect, then make the high pressure of pure electric automobile be cut off.
The 3rd relay 123 is connected with described entire car controller 15 by described interlock circuit, make pure electric automobile when battery management system 14 and 15 two equal et out of orders of controller of whole-control system, still can carry out cut off high by extracting maintenance switch 16 or high-voltage connector, further guarantee the high-voltage safety of whole system.Meanwhile, when pure electric automobile needs to safeguard, and service personnel is while producing maloperation, and with extracting maintenance switch 16 or high-voltage connector, to disconnect high pressure be best practice.
The present invention also provides a kind of pure electric automobile, it is characterized in that, comprises above-mentioned high pressure cut-off circuit.
In addition, the present invention also provides a kind of high pressure cut-off control method, high pressure cut-off circuit based on above-mentioned, the high pressure cut-off the control method below embodiment of the present invention being provided is introduced, high pressure cut-off control method described below is based on above-described high pressure cut-off circuit, this high pressure cut-off control method can be applicable to pure electric automobile, realizes the high pressure cut-off to pure electric automobile.
This high pressure cut-off control method comprises:
By battery management system 14, control the high pressure cut-off of pure electric automobile, as shown in Figure 5, concrete steps comprise diagram of circuit:
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 is controlled the disconnection that is connected on the first mouth DO1 and ground, chassis;
Step S112: the first contact 191 disconnects;
Step S113: battery management system 14 is controlled the disconnection that is connected on the second mouth DO2 and ground, chassis;
Step S114: the second contact 192 disconnects.
Battery management system 14 can disconnect by only controlling the first contact 191, and the first battery pack 111 and being connected all of each high voltage component 13 are disconnected, and high tension loop is cut off, thereby the high pressure of pure electric automobile is cut off.Also can disconnect by only controlling the second contact 192, the second battery pack 112 and being connected all of each high voltage component 13 are disconnected, high tension loop is cut off, thereby cut off the high pressure of pure electric automobile.Can also all disconnect by controlling the first contact 191 disconnections and the second contact 192, the first battery pack 111 and the second battery pack 112 were disconnected with being connected all of each high voltage component 13, high tension loop is cut off, thereby the high pressure of pure electric automobile be cut off; And battery management system 14 is controlled, the first contact 191 disconnects and the second contact 192 all disconnects, can first disconnect for controlling the first contact 191, controlling the second contact 192 disconnects again, can first disconnect for controlling the second contact 192, control again the first contact 192 and disconnect, can also be for control the first contact 191 and the second contact 192 disconnects simultaneously.
If the method that choice for use is only controlled the first contact 191 or only controlled the second contact 192 realizes the cut-out of pure electric automobile high pressure, after the first contact 191 or the second contact 192 are disconnected, although can disconnect high tension loop, the high pressure of pure electric automobile is cut off, but, because the high voltage component 13 in high tension loop is still connected with in the first battery pack 111 and the second battery pack 112 one group, the risk that system now still exists high pressure not to be completely severed, still there is potential safety hazard in system.And if the method that choice for use battery management system 14 control the first contacts 191 and the second contact 192 all disconnect is cut off the high pressure of pure electric automobile, the first contact 191 and the second contact 192 are all disconnected, high voltage component 13 in high tension loop was disconnected with the first battery pack 111 and the second being connected all of battery pack 112, the high pressure that can guarantee system is completely severed, and above-mentioned potential safety hazard is no longer existed.Therefore,, than only controlling the first contact 191 or only controlling the method that pure electric automobile high pressure cut-off is realized in the second contact 192, adopt to control the first contact 191 and the second contact 192 and all disconnect that to realize the method safety coefficient of pure electric automobile high pressure cut-off higher.
Simultaneously, in the situation that choice for use battery management system 14 is controlled the first contact 191 and the second contact 192 all disconnects the method that realizes pure electric automobile high pressure cut-off, select first to disconnect a contact in the first contact 191 and the second contact 192, disconnect again the mode of another contact in the first contact 191 and the second contact 192, than the method that simultaneously disconnects the first contact 191 and the second contact 192 better.Because, first disconnect behind a contact in the first contact 191 and the second contact 192, another contact in the first contact 191 and the second contact 192 will be in the state carrying, now, again this contact is disconnected, this contact carry to cut off for not being with, not the cutting off and will be conducive to the service life of extension device with carrying of equipment.
By entire car controller 15, control the high pressure cut-off of pure electric automobile, as shown in Figure 6, concrete steps comprise diagram of circuit:
Step S21: entire car controller 15 is controlled the 3rd contact 193 and disconnected;
Step S22: being connected simultaneously between the first relay 121 and the second relay 122 and+12V low potential source disconnects;
Step S23: during due to relay access low level, the contact of relay is by closure, and relay does not access low level, when accessing high level or not accessing level, the contact of relay is by the characteristic disconnecting, and the first contact 191 in the first relay 121 and the second contact 192 in the second relay 122 also will disconnect simultaneously;
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 output high level;
Step S212: the 3rd relay 123 receives after the high level from entire car controller 15 outputs, controls the 3rd contact 193 and disconnects.
With battery management system 14 and 15 two controllers of entire car controller, the high pressure of pure electric automobile is cut off, control independently battery management system 14 and control independently entire car controller 15, all can normally cut off the high pressure of pure electric automobile.When any in battery management system 14 and entire car controller 15 breaks down, can select again another controller to control the high pressure cut-off of pure electric automobile, make pure electric automobile high pressure cut-off can system of selection become more, eliminated in prior art, use Single Controller cut off high and this Single Controller can cut off high without additive method after breaking down problem.Meanwhile, because the method for high pressure cut-off becomes more, can be according to selecting different controllers to control high pressure cut-off when the different scenes, make, no matter can carry out the fastest high pressure cut-off when which kind of scene, to prevent the high pressure cut-off generation of problem not in time.
Preferably, described high pressure cut-off control method also comprises:
By extracting maintenance switch 16 or arbitrary high-voltage connector, realize the high pressure cut-off of pure electric automobile, as shown in Figure 7, concrete steps comprise diagram of circuit:
Step S31: extract maintenance switch 16 or arbitrary high-voltage connector;
Step S32: the disconnection that is connected of the 3rd relay 123 and entire car controller 15;
Step S33: the 3rd relay is controlled the 3rd contact 193 and disconnected because not receiving the level information that entire car controller 15 sends;
Step S34: the first relay 121 and the second relay 122 with+disconnect being connected simultaneously of 12V low potential source;
Step S35: the first contact 191 disconnects because of the power supply of the first relay 121 nothing+12V low potential sourcies, the second contact 192 disconnects because of the power supply of the second relay 122 nothing+12V low potential sourcies;
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.
Realizing in the method for high pressure cut-off of pure electric automobile by extracting maintenance switch 16 or arbitrary high-voltage connector, do not need to use the high pressure cut-off that any controller can be realized pure electric automobile.So, make when pure electric automobile is during at battery management system 14 and 15 two equal et out of orders of controller of whole-control system, still can carry out cut off high by extracting the method for maintenance switch 16 or arbitrary high-voltage connector, further guarantee the high-voltage safety of whole system.Meanwhile, when pure electric automobile needs to safeguard, and service personnel is while producing maloperation, and with extracting maintenance switch 16 or arbitrary high-voltage connector, to disconnect high pressure be best practice.
In addition, the diagram of circuit of pure electric automobile high pressure cut-off when Fig. 8 shows switch fuse 181 melt fusing, concrete steps comprise:
Step S41: the melt fusing of switch fuse 181;
Step S42: the connection between the first battery pack 111 and the second battery pack 112 disconnects;
Step S43: high tension loop is cut off because the connection between the first battery pack 111 and the second battery pack 112 disconnects;
Step S44: the high pressure of pure electric automobile is cut off because of the cut-out of high tension loop.
There is short circuit or overload fault in the trunk main in high tension loop; while making electric current by maintenance switch 16 surpass a specified value; the melt that is arranged on the switch fuse 181 in maintenance switch 16 will fuse automatically; make the disconnection that is connected between the first battery pack 111 and the second battery pack 112; be that high tension loop disconnects; thereby the high pressure of pure electric automobile is cut off; high pressure cut-off circuit is being short-circuited or during overload fault; system can be immediately to whole high pressure cut-off circuit carry out effectively, failure-free protection, make the use of system more safe.
Equally, the cut diagram of circuit of high voltage component high pressure that Fig. 9 is connected with this fuse while showing the 182 melt fusing of parts fuse, concrete steps comprise:
Step S51: the melt fusing of parts fuse 182;
Step S52: the first battery pack 111 and the disconnection that is connected with the connected high voltage component 13 of this parts fuse 182;
Step S53: the high pressure with the connected high voltage component 13 of this parts fuse 182 is cut off;
When short circuit or overload fault appear in the service main of certain high voltage component 13 connected high tension loop, while making electric current by this high voltage component 13 surpass a specified value, the melt of the parts fuse 182 being connected with this high voltage component 13 will fuse automatically, thereby cut-out the first battery pack 111 is connected with 13 of this high voltage components, the high pressure of this high voltage component 13 is cut off, and except this high voltage component 13, other equipment in high tension loop and be not short-circuited or the high voltage component of overload fault 13 all can normally be worked, have guaranteed the reliability of circuit.
Preferably, as shown in figure 10, when pure electric automobile breaks down, can the high pressure of 14 pairs of pure electric automobiles of battery management system be cut off to battery management system 14 transmission information by entire car controller 15, concrete steps be:
Step S61: entire car controller 15 detects pure electric car et out of order;
Step S62: entire car controller 15 sends lower electric instruction to battery management system 14;
Concrete, can to battery management system 14, be connected with whole-control system 15 with fieldbus, use fieldbus, with digital communication, substituted the transmission of traditional 4-20mA analog signal and regular tap amount signal, by the time division of digitalisation communication, multiplex, multiple spot, make the information transmission between battery management system 14 and entire car controller 15 more reliable, also increased the reliability of circuit.
Step S63: battery management system 14 receives that the high pressure of controlling pure electric automobile after lower electric instruction is cut off.
Wherein, the method that the battery management system 14 in step S63 is controlled pure electric automobile high pressure cut-off provides in embodiment above, will repeat no more herein.
Same, when pure electric automobile breaks down, also can the high pressure of 15 pairs of pure electric automobiles of entire car controller be cut off to entire car controller 15 transmission information by battery management system 14; Concrete, when battery management system 14 detects pure electric automobile and breaks down, by fieldbus, failure message is conveyed to entire car controller 15, entire car controller 15 carries out high pressure cut-off to pure electric automobile again, the method that entire car controller 15 is controlled pure electric automobile high pressure cut-off also provides in embodiment above, also repeats no more herein.So, in the time of can making any in 15 two controllers of battery management system 14 and entire car controller monitor the system failure, capital is notified another immediately, make can carry out well information interaction between two controllers, thereby make system when breaking down, can use immediately the controller of faster and better ground of energy cut off high when this fault to carry out cut off high, also guaranteed the reliability of circuit simultaneously.
Generally, when pure electric automobile needs cut off high because wanting to quit work, or while needing cut off high because battery system occurs major failure, select battery management system 14 to control the high pressure cut-off of pure electric automobile, than additive method, can use less the time by the high pressure cut-off of pure electric automobile; When major failure appears in vehicle and while needing cut off high, the high pressure cut-off of controlling pure electric automobile with entire car controller 15 is better; And when user or service personnel maloperation, can cut off by extracting maintenance switch 16 or arbitrary high-voltage connector the high pressure of pure electric automobile.
In this specification sheets, each embodiment adopts the mode of going forward one by one to describe, and each embodiment stresses is the difference with other embodiment, between each embodiment identical similar part mutually referring to.For the disclosed device of embodiment, because it corresponds to the method disclosed in Example, so description is fairly simple, relevant part partly illustrates referring to method.Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the present invention.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. for a high pressure cut-off circuit for pure electric automobile, it is characterized in that, comprise high tension loop and high pressure cut-off control circuit,
Described high tension loop comprises high voltage component, the first relay and the second relay; Wherein, described the first relay is all connected with high voltage component described in each with described the second relay, and described the first relay comprises the first contact, and described the second relay comprises the second contact;
Described high pressure cut-off control circuit comprises battery management system, entire car controller and the 3rd relay; Described battery management system is connected with described the second relay with described the first relay, described entire car controller is connected with described the 3rd relay, one end of described the 3rd relay and voltage are less than the power supply of 36 volts and are connected, and described the first relay is connected with described power supply by described the 3rd relay with described the second relay.
2. high pressure cut-off circuit according to claim 1, it is characterized in that, also comprise: interlock circuit, described interlock circuit comprises maintenance switch and high-voltage connector, a described high-voltage connector inserts in an interlocking interface of a described high voltage component, and described maintenance switch is connected with all described interlocking interface tandems; Described the 3rd relay is connected with described entire car controller by described interlock circuit.
3. high pressure cut-off circuit according to claim 2, is characterized in that, described high pressure cut-off circuit also comprises: switch fuse and parts fuse; Described switch fuse is placed in the inside of described maintenance switch, and a described parts fuse one end is connected with described the first relay, and the other end is connected with a described high voltage component.
4. high pressure cut-off circuit according to claim 1, is characterized in that, described battery management system is connected with the first relay by the first mouth, by the second mouth, is connected with the second relay.
5. high pressure cut-off circuit according to claim 1, it is characterized in that, the high end interface of communication of described battery management system is connected with the high end interface of communication of described entire car controller by fieldbus, and the low end interface of communication of described battery management system is connected with the low end interface of communication of described entire car controller by fieldbus.
6. a pure electric automobile, is characterized in that, comprises the high pressure cut-off circuit described in claim 1 to 5 any one.
7. a high pressure cut-off control method, is characterized in that, the high pressure cut-off circuit based on described in claim 1 to 5 any one, and this high pressure cut-off control method comprises:
Battery management system controls the first contact and/or the second contact disconnects, and high tension loop disconnects, and the high pressure of pure electric automobile is cut off;
Vehicle control unit controls the 3rd contact disconnects, and the power supply that makes the first relay and the second relay and voltage be less than 36 volts is connected disconnection, thereby the first contact and the second contact disconnect, and high tension loop disconnects, and the high pressure of pure electric automobile is cut off.
8. high pressure cut-off control method according to claim 7, is characterized in that, described battery management system controls the first contact and the disconnection of the second contact is specially:
Battery management system is controlled disconnections that be connected on the first mouth and chassis ground, the first contact disconnection;
Battery management system is controlled disconnections that be connected on the second mouth and chassis ground, the second contact disconnection.
9. high pressure cut-off control method according to claim 7, is characterized in that, described vehicle control unit controls the 3rd contact disconnects and being specially: entire car controller output high level, the 3rd contact disconnects.
10. high pressure cut-off control method according to claim 7, is characterized in that, described high pressure cut-off control method also comprises:
Extract maintenance switch or arbitrary high-voltage connector, the disconnection that is connected of the 3rd relay and entire car controller, the 3rd contact disconnects, thus the first contact and the second contact disconnect, and high tension loop disconnects, and the high pressure of pure electric automobile is cut off.
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| CN105539156A (en) * | 2015-12-15 | 2016-05-04 | 北汽福田汽车股份有限公司 | High voltage control circuit, high voltage control method and vehicle |
| CN107487183A (en) * | 2016-07-18 | 2017-12-19 | 宝沃汽车（中国）有限公司 | A kind of on-off control method thereof of high tension loop, system and electric automobile |
| 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 |
| CN112895903A (en) * | 2021-02-22 | 2021-06-04 | 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 |
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| CN112895903A (en) * | 2021-02-22 | 2021-06-04 | 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 |
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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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