CN208515396U - A kind of high voltage loop of electric automobile Detection & Controling circuit - Google Patents
A kind of high voltage loop of electric automobile Detection & Controling circuit Download PDFInfo
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- CN208515396U CN208515396U CN201821165168.8U CN201821165168U CN208515396U CN 208515396 U CN208515396 U CN 208515396U CN 201821165168 U CN201821165168 U CN 201821165168U CN 208515396 U CN208515396 U CN 208515396U
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Abstract
The utility model discloses a kind of high voltage loop of electric automobile Detection & Controling circuit, which includes: multiple high tension apparatus；Each high tension apparatus is connected with contactor and/or fuse；Battery management module, for main negative contactor enable signal to be enabled and generated to the negative contactor of master；High voltage control module, for detecting each fuse rear end voltage and generating fuse detection signal, it detects the auxiliary contact rear end voltage of each contactor and generates contacts of contactor detection signal, and each contactor in addition to the negative contactor of master is enabled and generates contactor enable signal；Entire car controller, for detecting signal, contacts of contactor signal, contactor enable signal and main negative contactor enable signal according to the fuse of acquisition, to judge the working condition of fuse and contactor.When the utility model avoids fuse blows, false judgment is the problem of contactor exception, each working condition of energy accurate judgement contactor.
Description
Technical field
The utility model belongs to electric vehicle engineering field, in particular to a kind of high voltage loop of electric automobile Detection & Controling
Circuit.
Background technique
Currently, electric car judges high voltage connector control, high tension loop current acquisition, high voltage connector state, adopt
With single BMS control and acquisition, the voltage swing of contactor rear end is acquired by BMS, in conjunction with the contactor coil controlled
State judges current contactor state (disconnection, closure, exception, adhesion).
All high voltage connectors are controlled using single part BMS and (rear end refers to electricity consumption by acquisition contactor rear end voltage
The contact at device end) judge contactor state, and be inaccurate by acquisition contactor rear end voltage to judge contactor state, because
For that can not judge whether the fuse of current loop fuses in existing high tension loop, after fuse blows, BMS can not be acquired
To the voltage of contactor rear end, no matter current relay status is closure or adhesion, BMS thinks that contactor is in disconnected at this time
It opens or abnormality, causes BMS and contactor status error is judged, be unable to correct response and go out which kind of shape current contactor is in
State.Also, all high voltage connectors are controlled using single part BMS, will lead to can not disconnect high pressure in certain special cases
Contactor (such as control module failure).
Summary of the invention
The purpose of this utility model is that: in view of the above technical problems, provide a kind of detection of high voltage loop of electric automobile with
Control circuit, to realize to the acquisition of fuse and contactor rear end voltage and correctly judge contactor working condition；It solves simultaneously
High voltage connector is certainly controlled using single part, security control can not be carried out to high voltage connector under control module failure and asked
Topic.
The technical solution adopted in the utility model is as follows:
A kind of high voltage loop of electric automobile Detection & Controling circuit includes: multiple high tension apparatus；Each high tension apparatus
It is connected with contactor and/or fuse；
Battery management module, the battery management module is connect with the coil of main negative contactor, for the negative contactor of master
It enables and generates main negative contactor enable signal；
High voltage control module, for detecting each fuse rear end voltage and generating fuse detection signal, and detection
The auxiliary contact rear end voltage of each contactor simultaneously generates contacts of contactor detection signal, and to each of in addition to the negative contactor of master
Contactor enables and generates contactor enable signal；
Entire car controller, it is enabled for detecting signal, contacts of contactor signal, contactor according to the fuse of acquisition
Signal and main negative contactor enable signal, judge the working condition of each fuse and contactor in high tension loop.
Preferably, the high voltage control module, comprising:
Voltage detection module detects each fuse rear end voltage for connecting each fuse rear end in high tension loop
And generate fuse detection signal；
Digital quantity inputs acquisition module, and for connecting the auxiliary contact rear end of each contactor in high tension loop, detection is every
The auxiliary contact rear end voltage of a contactor simultaneously generates contacts of contactor detection signal；
Contactor drive module is right for connecting the coil of each contactor in high tension loop in addition to the negative driver of master
Each contactor in addition to the negative contactor of master enables and generates contactor enable signal.
Preferably, the high voltage control module, further includes communication module；The high voltage control module passes through the communication mould
The fuse is detected signal, contacts of contactor signal, contactor enable signal and is sent to the entire car controller by block.
Preferably, the communication module of the entire car controller, battery management module and high voltage control module passes through CAN bus
Connection.
Preferably, the contactor includes: main drive contactor, PTC contactor, DCDC contactor, directly fills contactor, heating
Contactor and main negative contactor.
Preferably, the high voltage loop of electric automobile Detection & Controling circuit further includes main drive preliminary filling contactor；The master
Drive the main contacts and the main main contact parallel for driving contactor of preliminary filling contactor.
Preferably, the high voltage control module is also used to acquire the main master for driving preliminary filling contactor or main drive contactor
Contact front and back end voltage, and according to acquisition it is described it is main drive preliminary filling contactor or it is main drive contactor main contacts front and back end voltage,
Control the main on-off for driving preliminary filling contactor and main drive contactor.
Preferably, the high voltage loop of electric automobile Detection & Controling circuit further includes DCDC preliminary filling contactor；It is described
The main contact parallel of the main contacts of DCDC preliminary filling contactor and the DCDC contactor.
Preferably, the high voltage control module is also used to acquire the DCDC preliminary filling contactor or the DCDC contactor
Main contacts front and back end voltage, and according to before and after the main contacts of the DCDC preliminary filling contactor of acquisition or the DCDC contactor
Voltage is held, the on-off of the DCDC preliminary filling contactor and the DCDC contactor is controlled.
In conclusion by adopting the above-described technical solution, the beneficial effects of the utility model are:
1, signal and contacts of contactor signal are detected by the fuse of acquisition high tension apparatus in the utility model, and with this
The working condition for correctly judging contactor, avoids in fuse blows, and also false judgment is the problem of contactor exception, energy
It is enough accurately to reflect whether each fuse in high tension loop fuses, and preferably tell each contactor in high tension loop
Working condition, the disconnection of accurate judgement contactor, closure, adhesion, abnormality can by the acquisition to these information
Preferably judge the working condition of vehicle, preferably manage vehicle convenient for entire car controller VCU and carries out fault diagnosis.
2, the utility model is using two components of high voltage control module and battery management module BMS to connecing in high tension loop
Tentaculum is managed, and in the state of a wherein Module Fail, another module can disconnect performance loop, i.e., high voltage-controlled
Molding block can enable the main drive contactor, control the main drive contactor and be opened or closed, and battery management module BMS can make
The energy negative contactor of master, controls the negative contactor of the master and is opened or closed, so that high voltage control is safer and more reliable, avoid
Single module control can not disconnect after Module Fail the danger of contactor.
3, the utility model is using high voltage control module acquisition high tension loop precharging circuit and the circuit DCDC precharging circuit
Front and back end voltage effectively manages high pressure preliminary filling circuit, entire car controller VCU is further made preferably to manage vehicle.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by
Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also
To obtain other relevant attached drawings according to these attached drawings.
Fig. 1 is the high voltage loop of electric automobile Detection & Controling schematic block circuit diagram of the utility model.
Fig. 2 is the high voltage loop of electric automobile Detection & Controling circuit diagram of the utility model.
Fig. 3 is contactor detail drawing in the high voltage loop of electric automobile Detection & Controling circuit diagram of the utility model.
Fig. 4 is that preliminary filling contactor is detailed in the high voltage loop of electric automobile Detection & Controling circuit diagram of the utility model
Figure.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only to explain this
Utility model is not used to limit the utility model, i.e., the described embodiments are only a part of the embodiments of the utility model,
Instead of all the embodiments.The component of the utility model embodiment being usually described and illustrated herein in the accompanying drawings can be with each
Different configurations is planted to arrange and design.
Therefore, requirement is not intended to limit to the detailed description of the embodiments of the present invention provided in the accompanying drawings below
The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Reality based on the utility model
Apply example, those skilled in the art's every other embodiment obtained without making creative work belongs to
The range of the utility model protection.
It should be noted that the relational terms of term " first " and " second " or the like be used merely to an entity or
Operation is distinguished with another entity or operation, and without necessarily requiring or implying between these entities or operation, there are any
This actual relationship or sequence.Moreover, the terms "include", "comprise" or its any other variant be intended to it is non-exclusive
Property include so that include a series of elements process, method, article or equipment not only include those elements, but also
Further include other elements that are not explicitly listed, or further include for this process, method, article or equipment it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including described
There is also other identical elements in the process, method, article or equipment of element.
A kind of high voltage loop of electric automobile Detection & Controling circuit of the present embodiment, includes: multiple high tension apparatus；Each institute
It states high tension apparatus and is connected with contactor and/or fuse；
Battery management module, the battery management module is connect with the coil of main negative contactor, for the negative contactor of master
It enables and generates main negative contactor enable signal；
High voltage control module, for detecting each fuse rear end voltage and generating fuse detection signal, and detection
The auxiliary contact rear end voltage of each contactor simultaneously generates contacts of contactor detection signal, and to each of in addition to the negative contactor of master
Contactor enables and generates contactor enable signal；
Entire car controller, it is enabled for detecting signal, contacts of contactor signal, contactor according to the fuse of acquisition
Signal and main negative contactor enable signal, judge the working condition of each fuse and contactor in high tension loop.
The technical program detects signal and contacts of contactor signal by the fuse of acquisition high tension apparatus, and correct with this
The working condition for judging contactor is avoided in fuse blows, and also false judgment is the problem of contactor exception, Neng Gouzhun
True reflects whether each fuse in high tension loop fuses, and preferably tells the work of each contactor in high tension loop
Make state, the disconnection of accurate judgement contactor, closure, adhesion, abnormality can be more preferable by the acquisition to these information
The working condition for judging vehicle, convenient for entire car controller VCU preferably manage vehicle and carry out fault diagnosis.
Specifically, as shown in Fig. 2, the high voltage loop of electric automobile of the present embodiment, sets on power battery pack anode circuit
It is equipped with service switch MSD, service switch MSD is internally provided with main fuse, for carrying out short-circuit protection to entire circuit.Dynamic
Current sensor is arranged in power battery electrode major loop and main negative contactor, battery management module BMS are passed by conducting wire and electric current
Sensor is attached, and for detecting the size of current in entire circuit, battery management module BMS is directly contacted with main bear by conducting wire
The coil of device is connected, and avoids battery abuse and transient discharge to directly controlling for the negative contactor of master by battery management module BMS.
In high voltage loop of electric automobile in the present embodiment main high voltage device include electric machine controller, compressor of air conditioner,
PTC warm air heater, air pump controller, oil pump controller, DC-DC converter, DC charging socket and battery heat socket；It is right
The contactor of main high voltage device includes auxiliary contact using the high-voltage DC contactor with auxiliary contact as shown in Figure 3
Contactor has, and main drive contactor, DCDC contactor, directly fills contactor, also contacts device, main negative contactor at PTC contactor.And
Preliminary filling contactor uses high-voltage DC contactor as shown in Figure 4, including main drive preliminary filling contactor and DCDC preliminary filling contactor.Institute
Stating fuse includes: first fuse FS1, second fuse FS2, third fuse FS3, the 4th fuse FS4, the 5th fusing
The main fuse being arranged inside device FS5 and service switch MSD.The cathode of each main high voltage device is connected to that the master is negative to be connect
The end A2- of tentaculum；The anode of the electric machine controller is connected to the main end A2- for driving contactor；The PTC warm air heater
Anode be connected to the end A2- of the PTC contactor；The end A1+ of the PTC contactor and the anode of compressor of air conditioner are all connected with
To one end of first fuse FS1；The anode of the air pump controller is connected to one end of second fuse FS2；The oil pump
The anode of controller is connected to one end of third fuse FS3；The other end, the second fuse FS2 of the first fuse FS1
The other end and third fuse FS3 the other end be connected to it is described it is main drive contactor the end A2-；The DC-DC converter
Anode is connected to one end of the 4th fuse FS4；The main contacts of the main contacts of DCDC preliminary filling contactor and the DCDC contactor
And it is unified into the circuit DCDC precharging circuit, one end of the circuit DCDC precharging circuit is connect with the other end of the 4th fuse；
The other end of the circuit DCDC precharging circuit is connected to the main end A2- for driving contactor；The anode of the DC charging socket is connected to
The end A2- for directly filling contactor, the end A1+ for directly filling contactor are connected to the main end A2- for driving contactor；The electricity
The anode of pond heating socket is connected to one end of the 5th fuse FS5；The other end of the 5th fuse FS5 is connected to described
The end A2- of also contacts device；The end A1+ of the also contacts device is connected to the main end A2- for driving contactor；Main drive preliminary filling connects
The main contacts of tentaculum and the main main contact parallel for driving contactor are at high tension loop precharging circuit；The high tension loop precharge
The one end on road is connected to one end of MSD.The present embodiment is preferably using the main main contacts and the first voltage-stabiliser tube D1 for driving preliminary filling contactor
It connects, the DCDC preliminary filling contactor and connects with the second voltage-stabiliser tube D2 and the second preliminary filling resistance R2 with the first preliminary filling resistance R1,
Pressure stabilizing and current limliting are carried out to precharging circuit by using voltage-stabiliser tube and preliminary filling resistance, guarantee safety when precharge.
A kind of high voltage loop of electric automobile Detection & Controling circuit that the utility model preferred embodiment provides, comprising: whole
Vehicle controller VCU, battery management module BMS, high voltage control module；The high voltage control module is arranged in individual high voltage power distribution
In case or inside All-in-One power controller comprising voltage detection module, digital quantity input acquisition module, contactor drive mould
Block and communication module；The entire car controller VCU, battery management module BMS and the communication module of high voltage control module pass through CAN
Bus connection；The entire car controller obtains the fuse by CAN bus and detects signal, contacts of contactor signal, contact
Device enable signal and main negative contactor enable signal.To better discriminate between and illustrating, the voltage detection module of the present embodiment such as Fig. 2
It is shown, including first via voltage detection module and the second tunnel voltage detection module；The first via voltage detection module is provided with
The end A-, the end A1, the end A2 and the end A3, the second tunnel voltage detection module are provided with the end B-, the end B4, the end B5, the end B6, the end B7 and the end B8；
And the digital quantity input acquisition module is provided with port 1, port 2, port 3, port 4, port 5 and port 6；The contactor
Drive module setting has port 1, port 2, port 3, port 4, port 5, port 6 and port 7.
The voltage detection module detects each fuse rear end for connecting each fuse rear end in high tension loop
Voltage simultaneously generates fuse detection signal.Specifically, it is molten to be connected to the described 5th for the end A1 of the first via voltage detection module
One end of disconnected device FS5, the end A3 is connected to one end of service switch MSD；The end B4 of second tunnel voltage detection module is connected to
One end of 4th fuse FS4, the end B5 are connected to one end of third fuse FS3, and the end B6 is connected to the one of second fuse FS2
End, the end B7 are connected to one end of first fuse FS1, and the end B8 is connected to the end main drive contactor A2-.
Fuse state judges principle in high tension loop:
(1) after master's negative contactor normally closed, it can't detect normal voltage at the end A3 of first via voltage detection module
Value, the main fuse fusing being judged as inside service switch MSD；
(2) it after the negative contactor of master and main drive contactor normally closed, is detected at the end B7 of the second tunnel voltage detection module
Less than normal voltage value, it is judged as the first fuse FS1 fusing that compressor of air conditioner and PTC warm air heater circuit share；
(3) it after the negative contactor of master and main drive contactor normally closed, is detected at the end B6 of the second tunnel voltage detection module
Less than normal voltage value, it is judged as the second fuse FS2 fusing in air pump circuit；
(4) it after the negative contactor of master and main drive contactor normally closed, is detected at the end B5 of the second tunnel voltage detection module
Less than normal voltage value, it is judged as the third fuse FS3 fusing of oil pump loop；
(5) it after the negative contactor of master and DCDC contactor normally closed, is detected at the end B4 of the second tunnel voltage detection module
Without normal voltage value, it is judged as the 4th fuse FS4 fusing in the circuit DCDC；
(6) it after the negative contactor of master and also contacts device normally closed, is detected at the end A1 of first via voltage detection module
Less than normal voltage value, it is judged as the 5th fuse FS5 fusing of heating circuit.
The coil front end and auxiliary contact front end of each contactor are connected to vehicle+12V power supply in high tension loop, i.e., main
Drive preliminary filling contactor the end X1+, it is main drive the end X1+ of contactor, the end X1+ of PTC contactor, DCDC preliminary filling contactor the end X1+,
The end X1+ of DCDC contactor, directly fill the end X1+ of contactor and the end X1+ of also contacts device and it is main drive contactor the end T1,
The end T1 of contactor, the end T1 of also contacts device and main negative contact are directly filled in the end T1 of PTC contactor, the end T1 of DCDC contactor
The end T1 of device is connected to vehicle+12V power supply.
The digital quantity inputs acquisition module, for connecting the auxiliary contact rear end of each contactor in high tension loop, examines
It surveys the auxiliary contact rear end voltage of each contactor and generates contacts of contactor detection signal.Specifically, the digital quantity input
The port 1 of acquisition module is connected to the end T2 of main negative contactor, and port 2 is connected to the end T2 of also contacts device, and port 3 is connected to
The end T2 of D.C. contactor, port 4 are connected to the end T2 of DCDC contactor, and port 5 is connected to the end T2 of PTC contactor, port 6
It is connected to the main end T2 for driving contactor；
The battery management module BMS is connect with the coil of the negative contactor of the master, for making to the negative contactor of the master
Can, and the negative contactor enable signal of master is sent to the entire car controller.
The contactor drive module, for connecting the line of each contactor in high tension loop in addition to the negative driver of master
Circle, enables each contactor in addition to the negative contactor of master and generates contactor enable signal.Specifically, the contactor driving
The port 1 of module is connected to the end X1- of also contacts device, and port 2 is connected to the end X1- for directly filling contactor, and port 3 is connected to
The end X1- of DCDC contactor, port 4 are connected to the end X1- of DCDC preliminary filling contactor, and port 5 is connected to the X1- of PTC contactor
End, port 6 are connected to the main end X1- for driving contactor, and port 7 is connected to the main end X1- for driving preliminary filling contactor.
When fuse is unblown in high tension loop, the working condition of corresponding contactor judges principle:
1, the working condition of the main negative contactor of judgement.Battery management module BMS is directly connected to lead negative contactor coil, therefore
Can be directly enabled to the negative contactor of master, and the collected level in port 1 by inputting acquisition module in conjunction with the digital quantity is believed
Number the working condition of the negative contactor of master is judged.Specifically,
When battery management module BMS is not enabled on main negative contactor coil, digital quantity input acquisition module port 1 is not collected
+ 12V high level then leads negative contactor off-state；
When battery management module BMS enables main negative contactor coil, digital quantity input acquisition module port 1 collects+
12V high level then leads negative contactor closed state；
When battery management module BMS is not enabled on main negative contactor coil, digital quantity input acquisition module port 1 collects+
12V high level then leads negative contactor and is in adhesion state；
When battery management module BMS enables main negative contactor coil, digital quantity input acquisition module port 1 is not collected
+ 12V high level then leads negative contactor and is in abnormality；
2, judge the main working condition for driving contactor.Specifically,
When contactor drive module is not enabled on main drive contactor, digital quantity input acquisition module port 6 does not collect main drive
+ 12V the high level at the end T2 of contactor, then main drive contactor is in an off state；
When contactor drive module enables main drive contactor, digital quantity input acquisition module port 6 collects main drive and connects
+ 12V the high level at the end T2 of tentaculum, then main drive contactor is in closed state；
When contactor drive module is not enabled on main drive contactor, digital quantity input acquisition module port 6 collects main drive and connects
+ 12V the high level at the end T2 of tentaculum, then main drive contactor is in adhesion state；
When contactor drive module enables main drive contactor, digital quantity input acquisition module port 6 does not collect main drive
+ 12V the high level at the end T2 of contactor, then main drive contactor is in abnormality；
3, judge the working condition of PTC contactor.Specifically,
When contactor drive module is not enabled on PTC contactor, digital quantity input acquisition module port 5 does not collect PTC and connects
+ 12V the high level at the end T2 of tentaculum, then PTC contactor is in an off state；
When contactor drive module enables PTC contactor, digital quantity input acquisition module port 5 collects PTC contact
+ 12V the high level at the end T2 of device, then PTC contactor is in closed state；
When contactor drive module is not enabled on PTC contactor, digital quantity input acquisition module port 5 collects PTC contact
+ 12V the high level at the end T2 of device, then main drive contactor is in adhesion state；
When contactor drive module enables PTC contactor, digital quantity input acquisition module port 5 does not collect PTC and connects
+ 12V the high level at the end T2 of tentaculum, then PTC contactor is in abnormality；
4, judge the working condition of DCDC contactor.Specifically,
When contactor drive module is not enabled on DCDC contactor, digital quantity input acquisition module port 4 does not collect DCDC
+ 12V the high level at the end T2 of contactor, then DCDC contactor is in an off state；
When contactor drive module enables DCDC contactor, digital quantity input acquisition module port 4 collects DCDC and connects
+ 12V the high level at the end T2 of tentaculum, then DCDC contactor is in closed state；
When contactor drive module is not enabled on DCDC contactor, digital quantity input acquisition module port 4 collects DCDC and connects
+ 12V the high level at the end T2 of tentaculum, then main drive contactor is in adhesion state；
When contactor drive module enables DCDC contactor, digital quantity input acquisition module port 4 does not collect DCDC
+ 12V the high level at the end T2 of contactor, then DCDC contactor is in abnormality；
5, the working condition of contactor is directly filled in judgement.Specifically,
Contactor is directly filled when contactor drive module is not enabled on, digital quantity input acquisition module port 3, which does not collect, directly to be filled
+ 12V the high level at the end T2 of contactor then directly fills contactor and is in an off state；
Contactor is directly filled when contactor drive module enables, digital quantity input acquisition module port 3, which collects directly to fill, to be connect
+ 12V the high level at the end T2 of tentaculum then directly fills contactor and is in closed state；
Contactor is directly filled when contactor drive module is not enabled on, digital quantity input acquisition module port 3, which collects directly to fill, to be connect
+ 12V the high level at the end T2 of tentaculum, then main drive contactor is in adhesion state；
Contactor is directly filled when contactor drive module enables, digital quantity input acquisition module port 3, which does not collect, directly to be filled
+ 12V the high level at the end T2 of contactor then directly fills contactor and is in abnormality；
6, judge the working condition of also contacts device.Specifically,
When contactor drive module is not enabled on also contacts device, digital quantity input acquisition module port 2 does not collect heating
+ 12V the high level at the end T2 of contactor, then also contacts device is in an off state；
When contactor drive module enables also contacts device, digital quantity input acquisition module port 2 collects heating and connects
+ 12V the high level at the end T2 of tentaculum, then also contacts device is in closed state；
When contactor drive module is not enabled on also contacts device, digital quantity input acquisition module port 2 collects heating and connects
+ 12V the high level at the end T2 of tentaculum, then main drive contactor is in adhesion state；
When contactor drive module enables also contacts device, digital quantity input acquisition module port 2 does not collect heating
+ 12V the high level at the end T2 of contactor, then also contacts device is in abnormality.
In conjunction with the high voltage loop of electric automobile Detection & Controling circuit of the present embodiment, the auxiliary of fuse and contactor is touched
The working principle of the voltage detecting of point, the high voltage loop of electric automobile detection process of the present embodiment, specifically includes the following steps:
S1, detection fuse rear end voltage generate fuse and detect signal；
S2, the auxiliary contact rear end voltage for detecting contactor generate contactor and detect signal；
S3, the enabled generation contactor enable signal for detecting contactor；
S4, judge whether fuse fuses according to fuse detection signal；
S5, when judging that fuse is unblown, signal and the judgement contact of contactor enable signal are detected according to the contactor
The working condition of device；Specifically,
No contact enable signal, contactor detect the non-high level of signal, judge contactor for off-state；
There is contactor enable signal, it is high level that contactor, which detects signal, judges contactor for closed state；
No contact enable signal, it is high level that contactor, which detects signal, judges contactor for adhesion state；
There is contactor enable signal, contactor detects the non-high level of signal, judges contactor for abnormality.
In above-mentioned high voltage loop of electric automobile detection process, there is no ordinal relation between at least step S1, S2 and S3, it can
To carry out simultaneously, it can also should not determine that its executes sequence to carry out after one first one with the number before step.Also, above-mentioned vehicle
Controller judges the state of fuse and contactor, is to realize that existing entire car controller is equal according to the electric signal of acquisition
This function can be achieved.
The high voltage loop of electric automobile Detection & Controling circuit of the present embodiment, can also be by high pressure preliminary filling circuit contactor
The Detection & Controling to high tension loop preliminary filling are realized in high tension voltage acquisition comparison in front and back end.Power on initial stage, battery management module BMS
The main negative contactor of closure, the end A- of first via voltage detection module are public high voltage negative, are connected to the A2- of main negative contactor
End, the end B- of the second tunnel high pressure detection module are public high voltage negative, are connected to the end A1+ of main negative contactor.Electric machine controller,
Compressor of air conditioner, PTC warm air heater, air pump controller, oil pump controller are controlled by main drive contactor, and wherein PTC warm wind adds
A PTC contactor is separately provided in front end in hot device.
Specifically, electric machine controller, compressor of air conditioner, air pump controller, oil pump controller are driven in advance before powering on by main
It fills contactor to carry out powering on preliminary filling, the voltage U detected by the end A3 of first via voltage detection moduleA3And second road voltage inspection
Survey the voltage U that the end module B8 detectsB8Judge whether preliminary filling is completed: working as UB80.9 × U of >A3When voltage, it is considered as preliminary filling completion, inspection
After the completion of measuring preliminary filling, the contactor drive module of the high voltage control module is enabled, is closed main drive contactor and disconnects master
Preliminary filling contactor is driven, to protect main drive contactor, extends main drive contactor service life.
Further, the circuit DCDC precharging circuit positive (front end) is arranged in main drive contactor front end, can be in electricity
Electrical automobile works under being under driving states and charged state, provides low-tension supply for vehicle, in the charge state main drive
Contactor is off-state.The voltage U detected by the end A2 to first via voltage detection moduleA2And the electricity that the end A3 detects
Press UA3It compares, realizes the detection to the circuit DCDC precharging circuit precharging state, work as UA20.9 × U of >A3When, it is considered as pre- charge
At after the completion of detecting preliminary filling, the contactor drive module of the high voltage control module is enabled, and closed DC DC contactor disconnects
DCDC preliminary filling contactor extends main drive contactor service life to protect DCDC contactor.
This implementation can determine that the fuse in circuit is by the detection to fuse each in high tension loop rear end voltage
No fusing；And combine detection to fuse, by main drive contactor, PTC contactor, DCDC contactor, directly fill contactor,
The negative contactor of also contacts device master, using the high-voltage DC contactor with auxiliary contact, by auxiliary contact level state
Detection can determine the working condition of current contactor；And by being acquired to high pressure preliminary filling circuit contactor front and back end high tension voltage
The Detection & Controling to high tension loop preliminary filling are realized in comparison.The technical solution of the utility model can preferably tell height and push back
The working condition of each contactor in road accurately reports disconnection, closure, the adhesion, abnormality of contactor, accurately reacts
Whether each fuse fuses in high tension loop out, and is effectively managed high pressure preliminary filling circuit, by these information
Acquisition, can preferably judge the working condition of vehicle, convenient for entire car controller VCU preferably manage vehicle and carry out therefore
Barrier diagnosis.Contactor in high tension loop simultaneously is by being located at the high voltage control module in high voltage distribution box or in All-in-One controller
It is managed with two components of battery management module BMS, in the state of a wherein Module Fail, another module can
Disconnecting performance loop, i.e. high voltage control module can enable the main drive contactor, and it controls the main drive contactor and is opened or closed,
And battery management module BMS can enable the negative contactor of the master, controlling the negative contactor of the master is opened or closed, so that high voltage-controlled
Make safer and more reliable, the danger of contactor can not be disconnected after Module Fail by avoiding single module control.
It should be appreciated that the present embodiment judge charging voltage coefficient that preliminary filling is completed for 0.9, be comprehensively consider charge efficiency with
Safety, and for the present embodiment is illustrated and is arranged, specific coefficient value can be set according to practical application, and unlimited
Due to the present embodiment；Also, the device for the control high tension apparatus that the present embodiment uses, can also be by relay etc. for contactor
Replacement；Therefore, the above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, it is all
It is practical new to should be included in this for made any modifications, equivalent replacements, and improvements etc. within the spirit and principles of the utility model
Within the protection scope of type.
Claims (9)
1. a kind of high voltage loop of electric automobile Detection & Controling circuit characterized by comprising multiple high tension apparatus；Each institute
It states high tension apparatus and is connected with contactor and/or fuse；
Battery management module, the battery management module are connect with the coil of main negative contactor, for enabled to the negative contactor of master
And generate main negative contactor enable signal；
High voltage control module detects signal for detecting each fuse rear end voltage and generating fuse, and detection is each
The auxiliary contact rear end voltage of contactor simultaneously generates contacts of contactor detection signal, and to each contact in addition to the negative contactor of master
Device enables and generates contactor enable signal；
Entire car controller, for detecting signal, contacts of contactor signal, contactor enable signal according to the fuse of acquisition
With the negative contactor enable signal of master, the working condition of each fuse and contactor in high tension loop is judged.
2. high voltage loop of electric automobile Detection & Controling circuit as described in claim 1, which is characterized in that the high voltage control
Module, comprising:
Voltage detection module detects each fuse rear end voltage and life for connecting each fuse rear end in high tension loop
Signal is detected at fuse；
Digital quantity inputs acquisition module, and for connecting the auxiliary contact rear end of each contactor in high tension loop, detection is each connect
The auxiliary contact rear end voltage of tentaculum simultaneously generates contacts of contactor detection signal；
Contactor drive module, for connecting the coil of each contactor in high tension loop in addition to the negative driver of master, to except master
Each contactor outside negative contactor enables and generates contactor enable signal.
3. high voltage loop of electric automobile Detection & Controling circuit as claimed in claim 2, which is characterized in that the high voltage control
Module further includes communication module；The fuse is detected signal, contact by the communication module by the high voltage control module
Device contact signal, contactor enable signal are sent to the entire car controller.
4. high voltage loop of electric automobile Detection & Controling circuit as claimed in claim 3, which is characterized in that the full-vehicle control
Device, battery management module are connected with the communication module of high voltage control module by CAN bus.
5. high voltage loop of electric automobile Detection & Controling circuit according to any one of claims 1-4, which is characterized in that described
Contactor is the high-voltage DC contactor with auxiliary contact, comprising: main drive contactor, DCDC contactor, directly fills PTC contactor
Contactor, also contacts device and main negative contactor.
6. high voltage loop of electric automobile Detection & Controling circuit as claimed in claim 5, which is characterized in that further include main drive in advance
Fill contactor；The main main contacts for driving preliminary filling contactor and the main main contact parallel for driving contactor.
7. high voltage loop of electric automobile Detection & Controling circuit as claimed in claim 6, which is characterized in that the high voltage control
Module is also used to acquire the main main contacts front and back end voltage for driving preliminary filling contactor or main drive contactor, and according to acquisition
The main main contacts front and back end voltage for driving preliminary filling contactor or main drive contactor, controls the main drive preliminary filling contactor and main drive
The on-off of contactor.
8. high voltage loop of electric automobile Detection & Controling circuit as claimed in claim 5, which is characterized in that further include DCDC pre-
Fill contactor；The main contact parallel of the main contacts of the DCDC preliminary filling contactor and the DCDC contactor.
9. high voltage loop of electric automobile Detection & Controling circuit as claimed in claim 8, which is characterized in that the high voltage control
Module, is also used to acquire the main contacts front and back end voltage of the DCDC preliminary filling contactor or the DCDC contactor, and according to adopting
The DCDC preliminary filling contactor of collection or the main contacts front and back end voltage of the DCDC contactor control the DCDC preliminary filling contact
The on-off of device and the DCDC contactor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821165168.8U CN208515396U (en) | 2018-07-23 | 2018-07-23 | A kind of high voltage loop of electric automobile Detection & Controling circuit |
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| CN201821165168.8U CN208515396U (en) | 2018-07-23 | 2018-07-23 | A kind of high voltage loop of electric automobile Detection & Controling circuit |
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| CN208515396U true CN208515396U (en) | 2019-02-19 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108790829A (en) * | 2018-07-23 | 2018-11-13 | 四川江淮汽车有限公司 | A kind of high voltage loop of electric automobile Detection & Controling circuit and detection method |
| CN112858894A (en) * | 2019-11-28 | 2021-05-28 | 北京宝沃汽车股份有限公司 | Detection method and detection device for working state of contactor, storage medium and vehicle |
-
2018
- 2018-07-23 CN CN201821165168.8U patent/CN208515396U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108790829A (en) * | 2018-07-23 | 2018-11-13 | 四川江淮汽车有限公司 | A kind of high voltage loop of electric automobile Detection & Controling circuit and detection method |
| CN108790829B (en) * | 2018-07-23 | 2024-05-14 | 四川江淮汽车有限公司 | Detection and control circuit and detection method for high-voltage loop of electric automobile |
| CN112858894A (en) * | 2019-11-28 | 2021-05-28 | 北京宝沃汽车股份有限公司 | Detection method and detection device for working state of contactor, storage medium and vehicle |
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