CN205941816U - Detect circuit of high -pressure contactor contact state - Google Patents
Detect circuit of high -pressure contactor contact state Download PDFInfo
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- CN205941816U CN205941816U CN201620709394.2U CN201620709394U CN205941816U CN 205941816 U CN205941816 U CN 205941816U CN 201620709394 U CN201620709394 U CN 201620709394U CN 205941816 U CN205941816 U CN 205941816U
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Abstract
The utility model provides a detect circuit of high -pressure contactor contact state, include: first check point, second check point, third check point and fourth check point, high pressure signal acquisition circuit includes: the anodal signal acquisition circuit of first high pressure is connected with the third check point, gathers the anodal signal of first high pressure, the anodal signal acquisition circuit of second high pressure is connected with first check point, gathers the anodal signal of second high pressure, first high -pressure negative pole signal acquisition circuit is connected with the second check point, gathers first high -pressure negative pole signal, second high pressure negative pole signal acquisition circuit is connected with the fourth check point, gathers second high pressure negative pole signal, signal timesharing gate divides and confirms the circuit switch -on with set of circuits among the high pressure signal acquisition circuit and contact state many times, the circuit is confirmed to the contact state, according to the signal of gathering, confirms the state of first and second contacts after the switch -on many times. Above -mentioned technical scheme has improved the reliability of high -pressure contactor, and simple structure is with low costs.
Description
Technical field
The utility model is related to high voltage connector technical field, particularly to a kind of detection high voltage connector contacts status
Circuit.
Background technology
High voltage connector, in the products such as electric automobile, charging pile, is connected with electrokinetic cell, to protect for closing or disconnecting
The security of the upper electric and lower electricity of the product high-pressure systems such as card electric automobile, charging pile.
For example：In electric automobile field, in order to ensure the upper electric and lower electricity work safety of high-pressure system is it is necessary to high pressure
The adhesion state of contacts of contactor and closure state are detected, find potential faults in order to timely.For example, if high-voltage connecting
Tentaculum contact sticks together situation, after high voltage connector driving coil power-off can not timely and effectively cutoff high output,
Thus major safety risks can be caused.In addition, if the driving coil of high voltage connector obtain electric after, due to driving coil fault or
Contact resistance is too big etc., and factor causes contact situation about can not reliably close to occur it is impossible to provide energy for high-voltage load
Source, car load cannot normal work.
New national standard " GB/T 18487.1-2015 electric car conduction charging system, Part I：To non-in General Requirement "
The state of the high voltage connector in Vehicular charger and electric automobile proposes the requirement of monitoring.
Fig. 4 is the basic model electrical block diagram of prior art mesohigh testing circuit；First, in conjunction with Fig. 4 to height
The basic model circuit of pressure testing circuit is introduced：This circuit is a kind of differential amplifier circuit, as shown in figure 4, positive extra-high voltage
Input resistance R2 connects the in-phase end of amplifier, and negative pole high input voltage resistance R3 connects the end of oppisite phase of amplifier, can complete to high tension voltage
Proportional sampling, resistance R22=R33, R5=R6, gain：Gain=R5/R33, therefore:VO=V_P11N11 × R5/R33.R7
Form RC LPF with C1, output signal V_AD is delivered to MCU and done AD conversion.
In prior art, using three circuit as shown in Figure 4, connect four test points in Fig. 1 respectively, measure simultaneously
The contacts status of high voltage connector.However, such technical scheme, the signal coupled interference on this three tunnel can be caused, lead to detect
Result is inaccurate, and circuit structure is also more complicated.And, the accuracy for testing result, also will each testing circuit it
Between install xegregating unit additional, so also considerably increase the cost of equipment.
In addition, judging whether high voltage connector adhesion or closure are reliable, typically also rely on another kind of scheme at present：Using height
The auxiliary contact of crimping tentaculum, " auxiliary contact " of the prior art, refer to the auxiliary contact of high voltage connector itself, work as driving
When coil obtains electric, main contacts and auxiliary contact are closed at, and so can indirectly judge the adhesive of main contacts by auxiliary contact
State and off-state.The high expensive of this high voltage connector with auxiliary contact, and reliability is not high, will gradually be washed in a pan
Eliminate.
In sum, the circuit of existing detection high voltage connector contacts status, reliability is low, and circuit structure is complicated, cost
High.
Utility model content
The utility model embodiment provides a kind of circuit of detection high voltage connector contacts status, in order to improve high-voltage connecting
The reliability of tentaculum, reduces the cost of high voltage connector, above-mentioned contact includes：The first contact being connected with the positive pole of electrokinetic cell
And the second contact being connected with the negative pole of electrokinetic cell；Wherein, the circuit of this detection high voltage connector contacts status includes：
First test point is arranged between the positive pole of electrokinetic cell and the first end of the first contact；Second test point is arranged on
Between the first end of the negative pole of electrokinetic cell and the second contact；3rd test point is arranged on the second end and the direct current of the first contact
Between the positive pole of source；4th test point is arranged between the second end of the second contact and DC power cathode；
High-voltage signal Acquisition Circuit, including：First high-voltage positive electrode signal acquisition circuit, first end is connected to the 3rd detection
Point, for gathering the first high-voltage positive electrode signal；Second high-voltage positive electrode signal acquisition circuit, first end is connected to the first test point,
For gathering the second high-voltage positive electrode signal；First high voltage negative signal acquisition circuit, first end is connected to the second test point, is used for
Gather the first high voltage negative signal；Second high voltage negative signal acquisition circuit, first end is connected to the 4th test point, for gathering
Second high voltage negative signal；
Signal timesharing gating circuit, with the first high-voltage positive electrode signal acquisition circuit, the second high-voltage positive electrode signal acquisition circuit,
Second end of the first high voltage negative signal acquisition circuit and the second high voltage negative signal acquisition circuit connects, for several times by height
Set of circuits in pressure signal acquisition circuit determines circuit ON with contacts status, and multi-pass operation includes：In synchronization, by
One high-voltage positive electrode signal acquisition circuit and the first high voltage negative signal acquisition circuit, determine circuit ON with contacts status；Or,
Synchronization, the second high-voltage positive electrode signal acquisition circuit and the second high voltage negative signal acquisition circuit are determined with contacts status
Circuit ON；
Contacts status determine circuit, are connected with described signal timesharing gating circuit, for according to the collecting after connecting
One high-voltage positive electrode signal and the first high voltage negative signal, determine the state of the first contact, according to the second high-voltage positive electrode signal and
Two high voltage negative signals, determine the state of the second contact.
Compared with prior art, the technical scheme that the utility model embodiment provides, has the advantage that：
In the circuit of detection high voltage connector contacts status that the utility model embodiment provides, in synchronization, signal
Timesharing gating circuit only selects for the set of circuits in high-voltage signal Acquisition Circuit and contacts status to determine circuit ON, that is,
Say, synchronization only has one group of high-voltage signal Acquisition Circuit and is acquired work, and contacts status determine circuit also according only to collection
The one group of high-voltage signal arriving, determines the contacts status of high voltage connector.
Therefore, with four test points being connected respectively using three circuit diagrams as shown in Figure 4 in prior art in Fig. 1,
The technical scheme of measurement high voltage connector contacts status compares simultaneously：
First, both can effectively evade the problem of the interference that intercouples between multiplexed signal sampling circuit, improve high pressure
The reliability of contactor, without installing xegregating unit additional, circuit structure was both simple, and cost is again low；
Secondly, contacts status determine that circuit is also only a road, are connected with timesharing gating circuit, so only using a small amount of
Precision resistance and amplifier, both saved cost, circuit structure is again simple.
In addition, with contact the auxiliary contact of itself in prior art by high pressure, indirectly judge the attracting state of main contacts
And off-state, rely on the main contacts of high voltage connector to compare with the technical scheme of auxiliary contact, the utility model embodiment
The technical scheme providing, not against the auxiliary contact of high voltage connector itself, detects the contacts status of high voltage connector, reduces
The cost of high voltage connector.
To sum up, the circuit of the detection high voltage connector contacts status that the utility model embodiment provides, structure is simple, reliable
Property high, low cost.
Brief description
Accompanying drawing described herein is used for providing further understanding to of the present utility model, constitutes the part of the application,
Do not constitute to restriction of the present utility model.In the accompanying drawings：
Fig. 1 is the utility model embodiment mesohigh contactor and electrokinetic cell and DC output power connection status, with
And the schematic diagram of high voltage connector contact position and four test point positions；
Fig. 2 is the structural representation of the circuit detecting high voltage connector contacts status in the utility model one embodiment；
Fig. 3 is the structural representation of the circuit detecting high voltage connector contacts status in another embodiment of the utility model；
Fig. 4 is the basic model electrical block diagram of prior art mesohigh testing circuit.
Specific embodiment
For making the purpose of this utility model, technical scheme and advantage become more apparent, with reference to embodiment and attached
Figure, is described in further details to the utility model.Here, exemplary embodiment of the present utility model and its illustrate for solving
Release the utility model, but be not intended as to restriction of the present utility model.
The utility model embodiment provides a kind of circuit of detection high voltage connector contacts status, as shown in figure 1, above-mentioned
Contact includes：The first contact KP being connected with the positive pole of electrokinetic cell and the second contact KN being connected with the negative pole of electrokinetic cell；
The circuit of the detection high voltage connector contacts status that inventor proposes, as shown in Fig. 2 this circuit can include：
First test point P1 is arranged between the positive pole of electrokinetic cell and the first end of the first contact KP；Second test point N1
It is arranged between the negative pole of electrokinetic cell and the first end of the second contact KN；3rd test point P2 is arranged on the of the first contact KP
Between two ends and DC power anode；4th test point N2 be arranged on second end of the second contact KN and DC power cathode it
Between；
High-voltage signal Acquisition Circuit 100, including：First high-voltage positive electrode signal acquisition circuit, first end is connected to the 3rd inspection
Measuring point P2, for gathering the first high-voltage positive electrode signal；Second high-voltage positive electrode signal acquisition circuit, first end is connected to the first detection
Point P1, for gathering the second high-voltage positive electrode signal；First high voltage negative signal acquisition circuit, first end is connected to the second test point
N1, for gathering the first high voltage negative signal；Second high voltage negative signal acquisition circuit, first end is connected to the 4th test point
N2, for gathering the second high voltage negative signal；
Signal timesharing gating circuit 200, with the first high-voltage positive electrode signal acquisition circuit, the second high-voltage positive electrode signals collecting electricity
Second end of road, the first high voltage negative signal acquisition circuit and the second high voltage negative signal acquisition circuit connects, for several times
Set of circuits in high-voltage signal Acquisition Circuit 100 and contacts status are determined that circuit 300 is connected, multi-pass operation includes：Same
In one moment, the first high-voltage positive electrode signal acquisition circuit and the first high voltage negative signal acquisition circuit determine electricity with contacts status
Road 300 is connected；Or, in synchronization, by the second high-voltage positive electrode signal acquisition circuit and the second high voltage negative signal acquisition circuit,
Determine that circuit 300 is connected with contacts status；
Contacts status determine circuit 300, are connected with described signal timesharing gating circuit 200, for gathering according to after connecting
The the first high-voltage positive electrode signal arriving and the first high voltage negative signal, determine the state of the first contact KP, according to the second high-voltage positive electrode
Signal and the second high voltage negative signal, determine the state of the second contact KN.
When being embodied as, the first contact KP is the contact of the high voltage connector in high-voltage positive electrode loop, with electrokinetic cell
Positive pole connects；Second contact KN is the contact of the high voltage connector in high voltage negative loop, is connected with the negative pole of electrokinetic cell.
When being embodied as, the first test point P1 and the second test point N1, it is arranged on the input of electric automobile power battery
Side；3rd test point P2 and the 4th test point N2, is arranged on the outlet side of electric automobile power battery；The first of first contact KP
End is located at one end of the positive pole near electric automobile power battery；The first end of the second contact KN is located near electric powered motor
One end of the negative pole of battery；Second end of the first contact KP is one end of the positive pole away from electric automobile power battery；Second touches
Second end of point KN is one end of the negative pole away from electric automobile power battery.
When being embodied as, in one embodiment, above-mentioned " set of circuits " situation about including is：1st, the first high-voltage positive electrode letter
Number Acquisition Circuit and the first high voltage negative signal acquisition circuit；2nd, the second high-voltage positive electrode signal acquisition circuit and the second high voltage negative
Signal acquisition circuit.
When being embodied as, in synchronization, the first high-voltage positive electrode signal acquisition circuit and the first high voltage negative signal are adopted
With contacts status, collector, determines that circuit 300 is connected the electricity it can be determined that between the 3rd test point P2 and the second test point N1
Pressure, can determine before the first contact KP closure according to this voltage, and the first contact KP whether adhesion closes in the first contact KP
Afterwards, whether the first contact KP closure is reliable.
When being embodied as, in synchronization, the second high-voltage positive electrode signal acquisition circuit and the second high voltage negative signal are adopted
With contacts status, collector, determines that circuit 300 is connected the electricity it can be determined that between the first test point P1 and the 4th test point N2
Pressure, can determine before the second contact KN closure according to this voltage, and the second contact KN whether adhesion closes in the second contact KN
Afterwards, whether the second contact KN closure is reliable.
When being embodied as, contacts status determine that the circuit structure introduction of circuit 300 refers to accompanying drawing 4.
In one embodiment, the first high-voltage positive electrode signal acquisition circuit includes：In 3rd port P2 ', with Fig. 1 the 3rd
Test point P2 connects；First sampling resistor R1, first end is connected with the 3rd port P2 '；
Second high-voltage positive electrode signal acquisition circuit includes：First port P1 ', is connected with the first test point P1 in Fig. 1；The
Two sampling resistor R2, first end is connected with first port P1 '；
First high voltage negative signal acquisition circuit includes：Second port N1 ', is connected with the second test point N1 in Fig. 1；The
Three sampling resistor R3, first end is connected with second port N1 '；
Second high voltage negative signal acquisition circuit includes：4th port N2 ', is connected with the 4th test point N2 in Fig. 1；The
Four sampling resistor R4, first end is connected with the 4th port N2 '.
When being embodied as, the first sampling resistor R1, the second sampling resistor R2, the 3rd sampling resistor R3 and the 4th sampling resistor
R4 is identical, belongs to the high input voltage resistance in signal condition loop, in order to ensure accuracy of detection, needs to adopt precision resistance,
The requirement of volume is dropped to meet voltage stress, and each sampling resistor all can be in the way of using many resistant series.
In one embodiment, signal timesharing gating circuit 200 includes：
First electrode input end P2A is connected with second end of the first sampling resistor R1；
Second electrode input end P1A is connected with second end of the second sampling resistor R2；
First negative input N1A is connected with second end of the 3rd sampling resistor R3；
Second negative input N2A is connected with second end of the 4th sampling resistor R4；
Positive pole timesharing gating device, for meeting described first electrode input end P2A and high-voltage positive electrode signal output part PB
Logical, by the first high-voltage positive electrode signal output to high-voltage positive electrode signal output part PB；Or by described second electrode input end P1A and institute
State high-voltage positive electrode signal output part PB to connect, by the second high-voltage positive electrode signal output to high-voltage positive electrode signal output part PB；
Negative pole timesharing gating device, for meeting described first negative input N1A and high voltage negative signal output part NB
Logical, by the first high voltage negative signal output to high voltage negative signal output part NB；Or by described second negative input N2A and institute
State high voltage negative signal output part NB to connect, by the second high-voltage positive electrode signal output to high voltage negative signal output part NB；
Described high-voltage positive electrode signal output part PB and high voltage negative signal output part NB determines circuit for described contacts status
300 signal input part.
When being embodied as, the PB in Fig. 2 is the output end of positive signal, and NB is the output end of negative signal, in Fig. 2
DRV_P and DRV_N is that 2 tunnel timesharing select drive signal, is typically produced by microcontroller, wherein, RLY_P is responsible for realizing high positive pressure
The alternative function of pole signal, and signal is connected to the in-phase end of amplifier, wherein RLY_N is responsible for realizing the two of high voltage negative signal
Select a function, and signal is connected to the end of oppisite phase of amplifier it is ensured that synchronization only connects 1 group of high input voltage resistance.
The utility model is directed to positive pole timesharing gating device and the negative pole timesharing gating device of signal timesharing gating circuit, carries
Go out two kinds of structures, with reference to Fig. 2 and Fig. 3, both structures have been described in detail.
The first structure：As shown in Fig. 2 positive pole timesharing gating device includes：
First stationary contact 11, is connected with the first electrode input end P2A；Second stationary contact 22, with the second electrode input end P1A
Connect；First movable contact 33, is connected with high-voltage positive electrode signal output part (PB) (i.e. the in-phase end of amplifier)；Positive pole timesharing gate
Part can be the RLY_P in Fig. 2；
Negative pole timesharing gating device includes：
3rd stationary contact 44, is connected with the first negative input N1A；4th stationary contact 55, with the second negative input N2A
Connect；Second movable contact 66, is connected with high voltage negative signal output part (NB) (i.e. the end of oppisite phase of amplifier)；Negative pole timesharing gate
Part can be the RLY_N in Fig. 2.
In an example, described contacts status determine that circuit 300 includes：
First contact KP state determines the first circuit, for according to first voltage V_P2N1, determining and closing in the first contact KP
Before conjunction, the first contact KP whether adhesion, after the first contact KP closure, whether the first contact KP closure is reliable；Described first electricity
Pressure V_P2N1 be：Connect with the first stationary contact 11 in the first movable contact 33, and the second movable contact 66 is connected with the 3rd stationary contact 44
When (when RLY_P closure, RLY_N release when, RLY_P normally opened contact conducting, RLY_N normally-closed contact conducting when), according to
Defeated by the 3rd port P2 ', the first sampling resistor R1, the first electrode input end P2A, the first stationary contact 11 and the first movable contact 33
Go out the high-voltage positive electrode signal to high-voltage positive electrode signal output part PB, and by second port N1 ', the 3rd sampling resistor R3,
First negative input N1A, the 3rd stationary contact 44 and the second movable contact 66 export the first of high voltage negative signal output part NB
High voltage negative signal, the voltage between the 3rd test point P2 obtaining and the second test point N1；
Second contact KN state determines the first circuit, for according to second voltage V_P1N2, determining and closing in the second contact KN
Before conjunction, the second contact KN whether adhesion, after the second contact KN closure, whether the second contact KN closure is reliable；Described second electricity
Pressure V_P1N2 be：Connect with the second stationary contact 22 in the first movable contact 33, and the second movable contact 66 is connected with the 4th stationary contact 55
When (when RLY_P release, RLY_N closure when, RLY_P normally-closed contact conducting, RLY_N normally opened contact conducting when), according to
Defeated by first port P1 ', the second sampling resistor R2, the second electrode input end P1A, the second stationary contact 22 and the first movable contact 33
Go out the second high-voltage positive electrode signal to high-voltage positive electrode signal output part PB, and pass through the 4th port N2 ', the 4th sampling resistor
R4, the second negative input N2A, the 4th stationary contact 55 and the second movable contact 66 export the of high voltage negative signal output part NB
Two high voltage negative signals, the voltage between the first test point P1 obtaining and the 4th test point N2.
In one embodiment, described multi-pass operation also includes：In synchronization, by the first high-voltage positive electrode signals collecting electricity
With contacts status, road and the second high voltage negative signal acquisition circuit, determine that circuit 300 is connected；Or, in synchronization, by the second height
With contacts status, positive pressure pole signal acquisition circuit and the first high voltage negative signal acquisition circuit, determine that circuit 300 is connected；
Described contacts status determine that circuit 300 is additionally operable to：
According to the first high-voltage positive electrode signal collecting after connecting and the second high voltage negative signal, determine tertiary voltage V_
P2N2；Described tertiary voltage V_P2N2 is：Connect with the first stationary contact 11 in the first movable contact 33, and the second movable contact 66 and
When four stationary contact 55 is connected (when RLY_P, RLY_N close, during the normally opened contact conducting of RLY_P and RLY_N), according to logical
Cross the 3rd port P2 ', the first sampling resistor R1, the first electrode input end P2A, the first stationary contact 11 and the first movable contact 33 to export
To the first high-voltage positive electrode signal of high-voltage positive electrode signal output part PB, and by the 4th port N2 ', the 4th sampling resistor R4,
Second negative input N2A, the 4th stationary contact 55 and the second movable contact 66 export the second of high voltage negative signal output part NB
High voltage negative signal, the voltage between the 3rd test point P2 obtaining and the 4th test point N2；
According to the second high-voltage positive electrode signal collecting after connecting and the first high voltage negative signal, determine the 4th voltage V_
P1N1；Described 4th voltage V_P1N1 is：Connect with the second stationary contact 22 in the first movable contact 33, and the second movable contact 66 and
When three stationary contact 44 is connected (when RLY_P, RLY_N discharge, during the normally-closed contact conducting of RLY_P and RLY_N, as Fig. 2
Shown in meaning state), according to by first port P1 ', the second sampling resistor R2, the second electrode input end P1A, the second stationary contact
Point 22 and the first movable contact 33 output the second high-voltage positive electrode signal, and by second port N1 ', the 3rd sampling resistor R3,
The first high voltage negative signal of the first negative input N1A, the 3rd stationary contact 44 and the second movable contact 66 output, first obtaining
Voltage between test point P1 and the second test point N1；
According to described tertiary voltage V_P2N2 and the 4th voltage V_P1N1, determine the first contact and the state of the second contact.
When being embodied as, according to the voltage difference between described tertiary voltage V_P2N2 and the 4th voltage V_P1N1, can be true
After being scheduled on the first contact KP and the second contact KN closure, whether the first contact KP and the second contact KN closure is reliable, or first touches
Whether point KP and the second contact KN sticks together.Certainly, in order to further confirm that the specifically first contact KP, or the second contact
The contacts status of KN go wrong, and can determine that the first circuit and the second contact KN state are true by above-mentioned first contact KP state
Determine the first circuit to carry out judging to confirm.
In addition, the technical scheme that the present embodiment provides, can be also used for detecting the voltage power supply situation of electrokinetic cell, specifically
During enforcement, electrokinetic cell voltage can be judged according to the 4th voltage V_P1N1.
Second structure：As shown in figure 3, positive pole timesharing gating device includes：First light coupling relay, defeated with the first positive pole
Enter to hold P2A to connect, under the driving of the first drive signal DRV_P1, by the first high-voltage positive electrode signal acquisition circuit and contact
State determination circuit 300 is connected；
Second light coupling relay, is connected with the second electrode input end P1A, for the driving in the second drive signal DRV_P2
Under, the second high-voltage positive electrode signal acquisition circuit and contacts status are determined that circuit 300 is connected；
Negative pole timesharing gating device includes：
3rd light coupling relay, is connected with the second negative input N2A, for the driving in fourth drive signal DRV_N2
Under, the second high voltage negative signal acquisition circuit and contacts status are determined that circuit 300 is connected；
4th light coupling relay, is connected with the first negative input N1A, for the drive in the 3rd drive signal DRV_N1
Under dynamic, the first high voltage negative signal acquisition circuit and contacts status are determined that circuit 300 is connected.
In an example, as shown in figure 3, the first light coupling relay includes：First light emitting diode 201, positive pole and
One drive circuit connects, minus earth；First light-receiving device 205, the first pin a of the first light-receiving device 205 and the input of the first positive pole
End P2A connects；First drive circuit exports the first drive signal DRV_P1；
Second light coupling relay includes：Second light emitting diode 202, positive pole is connected with the second drive circuit, minus earth；
Second light-receiving device 206, the three-prong c of the second light-receiving device 206 and the second pin b of the first light-receiving device 205, high-voltage positive electrode signal
Output end PB connects, and the 4th pin d of the second light-receiving device 206 is connected with the second electrode input end P1A；Second drive circuit output
Second drive signal DRV_P2；
3rd light coupling relay includes：3rd light emitting diode 203, positive pole is connected with the 3rd drive circuit, minus earth；
3rd light-receiving device 207, the 5th pin e of the 3rd light-receiving device 207 is connected with the second negative input N2A；3rd drive circuit is defeated
Go out the 3rd drive signal DRV_N2；
4th light coupling relay includes：4th light emitting diode 204, positive pole is connected with the 4th drive circuit, minus earth；
4th light-receiving device 208, the 7th pin g of the 4th light-receiving device 208 and the 6th pin f of the 3rd light-receiving device 207, high voltage negative signal
Output end NB connects, and the 8th pin h of the 4th light-receiving device 208 is connected with the first negative input N1A；4th driving circuit output
Fourth drive signal DRV_N1.
In an example, contacts status determine that circuit 300 includes：
First contact KP state determines second circuit, for according to first voltage V_P2N1, determining and closing in the first contact KP
Before conjunction, the first contact KP whether adhesion, after the first contact KP closure, whether the first contact KP closure is reliable；First voltage V_
P2N1 (can also be referred to as the 5th voltage V_P2N1 ') is：Under the triggering of the first light emitting diode 201, the first light-receiving device 205 is led
Logical, and under the triggering of the 4th light emitting diode 204, during the 4th light-receiving device 208 conducting, according to by the 3rd port P2 ', first
Sampling resistor R1, the first electrode input end P2A, the first pin a of the first light-receiving device 205 and the second pin b export high pressure letter
First high-voltage positive electrode signal of number output end PB, and by second port N1 ', the 3rd sampling resistor R3, the first negative pole input
End N1A, the 8th pin h and the 7th pin g of the 4th light-receiving device 208 export first high pressure of high voltage negative signal output part NB
Negative signal, the voltage between the 3rd test point P2 obtaining and the second test point N1；
Second contact KN state determines second circuit, for according to second voltage V_P1N2, determining and closing in the second contact KN
Before conjunction, the second contact KN whether adhesion, after the second contact KN closure, whether the second contact KN closure is reliable；Second voltage V_
P1N2 (can also be referred to as the 6th voltage V_P1N2 ') is：Under the triggering of the second light emitting diode 202, the second light-receiving device 206 is led
Logical, and under the triggering of the 3rd light emitting diode 203, during the 3rd light-receiving device 207 conducting, according to by first port P1 ', the
Two sampling resistor R2, the second electrode input end P1A, the 4th pin d and three-prong c of the second light-receiving device 206 export high pressure
The second high-voltage positive electrode signal of signal output part PB, and defeated by the 4th port N2 ', the 4th sampling resistor R4, the second negative pole
Enter to hold N2A, the 5th pin e, the 6th pin f of the 3rd light-receiving device 207 to export second height of high voltage negative signal output part NB
Pressure negative signal, the voltage between the first test point P1 obtaining and the 4th test point N2.
In one embodiment, described multi-pass operation also includes：In synchronization, by the first high-voltage positive electrode signals collecting electricity
With contacts status, road and the second high voltage negative signal acquisition circuit, determine that circuit 300 is connected；Or, in synchronization, by the second height
With contacts status, positive pressure pole signal acquisition circuit and the first high voltage negative signal acquisition circuit, determine that circuit 300 is connected；
Described contacts status determine that circuit 300 is additionally operable to：
According to the first high-voltage positive electrode signal collecting after connecting and the second high voltage negative signal, determine tertiary voltage V_
P2N2；Described tertiary voltage V_P2N2 (can also be referred to as the 7th voltage V_P2N2 ') is：Touching in the first light emitting diode 201
Give, the first light-receiving device 205 turns on, and under the triggering of the 3rd light emitting diode 203, during the 3rd light-receiving device 207 conducting, according to
By the 3rd port P2 ', the first sampling resistor R1, the first electrode input end P2A, the first pin a of the first light-receiving device 205 and
Two pin b export the first high-voltage positive electrode signal of high-voltage signal output end PB, and by the 4th port N2 ', the 4th sampling
Resistance R4, the second negative input N2A, the 5th pin e, the 6th pin f of the 3rd light-receiving device 207 export high voltage negative signal
Second high voltage negative signal of output end NB, the voltage between the 3rd test point P2 obtaining and the 4th test point N2；
According to the second high-voltage positive electrode signal collecting after connecting and the first high voltage negative signal, determine the 4th voltage V_
P1N1；Described 4th voltage V_P1N1 (can also be referred to as the 8th voltage V_P1N1 ') is：Touching in the second light emitting diode 202
Give, the second light-receiving device 206 turns on, and under the triggering of the 4th light emitting diode 204, during the 4th light-receiving device 208 conducting, according to
By first port P1 ', the second sampling resistor R2, the second electrode input end P1A, the 4th pin f of the second light-receiving device 206 and
Three-prong e exports the second high-voltage positive electrode signal of high-voltage signal output end PB, and by second port N1 ', the 3rd sampling
Resistance R3, the first negative input N1A, the 8th pin h and the 7th pin g of the 4th light-receiving device 208 export high voltage negative letter
First high voltage negative signal of number output end NB, the voltage between the first test point P1 obtaining and the second test point N1；
According to described tertiary voltage V_P2N2 and the 4th voltage V_P1N1, determine the first contact and the state of the second contact.
When being embodied as, according to the voltage difference between described tertiary voltage V_P2N2 and the 4th voltage V_P1N1, can be true
After being scheduled on the first contact KP and the second contact KN closure, whether the first contact KP and the second contact KN closure is reliable, or first touches
Whether point KP and the second contact KN sticks together.Certainly, in order to further confirm that the specifically first contact KP, or the second contact
The contacts status of KN go wrong, and can determine that second circuit and the second contact KN state are true by above-mentioned first contact KP state
Determine second circuit to carry out judging to confirm.
Equally, the technical scheme that the present embodiment provides is it is also possible to be used for detecting the voltage power supply situation of electrokinetic cell, specifically
During enforcement, electrokinetic cell voltage can be judged according to the 4th voltage V_P1N1.
In one embodiment, the first light-receiving device 205, the second light-receiving device 206, the 3rd light-receiving device 207 and the 4th light-receiving device
208 export light-receiving device for MOS.
When being embodied as, the another embodiment of Fig. 3, difference is the signal timesharing gating circuit of centre, Fig. 4 scheme
Used in miniature relay form, the scheme of Fig. 3 uses the form of light coupling relay, and the final function of realizing is one
Sample.In Fig. 3, DRV_P1, DRV_P2, DRV_N1, DRV_N2 are that 4 tunnel timesharing select drive signal, wherein DRV_P1, DRV_P2
It is responsible for realizing the alternative function to high-voltage positive electrode signal, DRV_N1 and DRV_N2 is responsible for realizing two choosings to high voltage negative signal
One function.
When being embodied as, the utility model positive pole timesharing gating device and negative pole timesharing gating device can be：Signal continues
Electrical equipment or light coupling relay (PhotoMOS Relay) etc..
The utility model embodiment achieves following technique effect：
In the circuit of detection high voltage connector contacts status that the utility model embodiment provides, in synchronization, signal
Timesharing gating circuit only selects for the set of circuits in high-voltage signal Acquisition Circuit and contacts status to determine circuit ON, that is,
Say, synchronization only has one group of high-voltage signal Acquisition Circuit and is acquired work, and contacts status determine circuit also according only to collection
The one group of high-voltage signal arriving, determines the contacts status of high voltage connector.
Therefore, with four test points being connected respectively using three circuit diagrams as shown in Figure 4 in prior art in Fig. 1,
The technical scheme of measurement high voltage connector contacts status compares simultaneously：
First, both can effectively evade the problem of the interference that intercouples between multiplexed signal sampling circuit, improve high pressure
The reliability of contactor, without installing xegregating unit additional, circuit structure was both simple, and cost is again low；
Secondly, contacts status determine that circuit is also only a road, are connected with timesharing gating circuit, so only using a small amount of
Precision resistance and amplifier, both saved cost, circuit structure is again simple.
In addition, with contact the auxiliary contact of itself in prior art by high pressure, indirectly judge the attracting state of main contacts
And off-state, rely on the main contacts of high voltage connector to compare with the technical scheme of auxiliary contact, the utility model embodiment
The technical scheme providing, not against the auxiliary contact of high voltage connector itself, detects the contacts status of high voltage connector, reduces
The cost of high voltage connector.
To sum up, the circuit of the detection high voltage connector contacts status that the utility model embodiment provides, structure is simple, reliable
Property high, low cost.
The circuit of the detection high voltage connector contacts status that the utility model provides, can be used in electric automobile and judge height
Adhesion and closure state that crimping tentaculum gets an electric shock, thus ensureing the security of the upper electric and lower electricity of electric automobile high-voltage system, when
So it is also possible to be used in the products such as charging pile.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for this
For the technical staff in field, the utility model embodiment can have various modifications and variations.All in spirit of the present utility model
Within principle, any modification, equivalent substitution and improvement made etc., should be included within protection domain of the present utility model.
Claims (10)
1. a kind of circuit of detection high voltage connector contacts status, described contact includes：Being connected with the positive pole of electrokinetic cell
One contact (KP) and the second contact (KN) of being connected with the negative pole of electrokinetic cell it is characterised in that
The circuit of described detection high voltage connector contacts status includes：
First test point (P1) is arranged between the positive pole of electrokinetic cell and the first end of the first contact (KP)；Second test point
(N1) it is arranged between the negative pole of electrokinetic cell and the first end of the second contact (KN)；3rd test point (P2) is arranged on first and touches
Between second end of point (KP) and DC power anode；4th test point (N2) be arranged on the second end of the second contact (KN) with straight
Between stream power cathode；
High-voltage signal Acquisition Circuit (100), including：First high-voltage positive electrode signal acquisition circuit, first end is connected to the 3rd detection
Point (P2), for gathering the first high-voltage positive electrode signal；Second high-voltage positive electrode signal acquisition circuit, first end is connected to the first detection
Point (P1), for gathering the second high-voltage positive electrode signal；First high voltage negative signal acquisition circuit, first end is connected to the second detection
Point (N1), for gathering the first high voltage negative signal；Second high voltage negative signal acquisition circuit, first end is connected to the 4th detection
Point (N2), for gathering the second high voltage negative signal；
Signal timesharing gating circuit (200), with described first high-voltage positive electrode signal acquisition circuit, the second high-voltage positive electrode signals collecting
Second end of circuit, the first high voltage negative signal acquisition circuit and the second high voltage negative signal acquisition circuit connects, many for point
Set of circuits in secondary (100) by high-voltage signal Acquisition Circuit and contacts status determine that circuit (300) is connected, multi-pass operation bag
Include：In synchronization, by the first high-voltage positive electrode signal acquisition circuit and the first high voltage negative signal acquisition circuit, with contacts status
Determine that circuit (300) is connected；Or, in synchronization, by the second high-voltage positive electrode signal acquisition circuit and the second high voltage negative signal
With contacts status, Acquisition Circuit, determines that circuit (300) is connected；
Contacts status determine circuit (300), are connected with described signal timesharing gating circuit (200), for gathering according to after connecting
The the first high-voltage positive electrode signal arriving and the first high voltage negative signal, determine the state of the first contact (KP), according to the second high positive pressure
Pole signal and the second high voltage negative signal, determine the state of the second contact (KN).
2. the circuit of detection high voltage connector contacts status as claimed in claim 1 is it is characterised in that described first high positive pressure
Pole signal acquisition circuit includes：3rd port (P2 '), is connected with described 3rd test point (P2)；First sampling resistor (R1), the
One end is connected with described 3rd port (P2 ')；
Described second high-voltage positive electrode signal acquisition circuit includes：First port (P1 '), is connected with described first test point (P1)；
Second sampling resistor (R2), first end is connected with described first port (P1 ')；
Described first high voltage negative signal acquisition circuit includes：Second port (N1 '), is connected with described second test point (N1)；
3rd sampling resistor (R3), first end is connected with described second port (N1 ')；
Described second high voltage negative signal acquisition circuit includes：4th port (N2 '), is connected with described 4th test point (N2)；
4th sampling resistor (R4), first end is connected with described 4th port (N2 ').
3. the circuit of detection high voltage connector contacts status as claimed in claim 2 is it is characterised in that described signal timesharing is selected
Circuit passband (200) includes：
First electrode input end (P2A) is connected with the second end of described first sampling resistor (R1)；
Second electrode input end (P1A) is connected with the second end of described second sampling resistor (R2)；
First negative input (N1A) is connected with the second end of described 3rd sampling resistor (R3)；
Second negative input (N2A) is connected with the second end of described 4th sampling resistor (R4)；
Positive pole timesharing gating device, for connecing described first electrode input end (P2A) and high-voltage positive electrode signal output part (PB)
Logical, by the first high-voltage positive electrode signal output to high-voltage positive electrode signal output part (PB)；Or by described second electrode input end (P1A)
Connect with described high-voltage positive electrode signal output part (PB), by the second high-voltage positive electrode signal output to high-voltage positive electrode signal output part
(PB)；
Negative pole timesharing gating device, for connecing described first negative input (N1A) and high voltage negative signal output part (NB)
Logical, by the first high voltage negative signal output to high voltage negative signal output part (NB)；Or by described second negative input (N2A)
Connect with described high voltage negative signal output part (NB), by the second high-voltage positive electrode signal output to high voltage negative signal output part
(NB)；
Described high-voltage positive electrode signal output part (PB) and high voltage negative signal output part (NB) determine circuit for described contacts status
(300) signal input part.
4. the circuit of detection high voltage connector contacts status as claimed in claim 3 is it is characterised in that described positive pole timesharing is selected
Logical device includes：
First stationary contact (11), is connected with described first electrode input end (P2A)；Second stationary contact (22), with described second just
Pole input (P1A) connects；First movable contact (33), is connected with described high-voltage positive electrode signal output part (PB)；
Described negative pole timesharing gating device includes：
3rd stationary contact (44), is connected with described first negative input (N1A)；4th stationary contact (55), negative with described second
Pole input (N2A) connects；Second movable contact (66), is connected with described high voltage negative signal output part (NB).
5. the circuit of detection high voltage connector contacts status as claimed in claim 4 is it is characterised in that described contacts status
Determine that circuit (300) includes：
First contact (KP) state determines the first circuit, for according to first voltage (V_P2N1), determining at the first contact (KP)
Before closure, the first contact (KP) whether adhesion, after the first contact (KP) closure, whether the first contact (KP) closure is reliable；Institute
Stating first voltage (V_P2N1) is：Connect in the first movable contact (33) and the first stationary contact (11), and the second movable contact (66) with
When 3rd stationary contact (44) is connected, according to by the 3rd port (P2 '), the first sampling resistor (R1), the first electrode input end
(P2A), the first stationary contact (11) and the first movable contact (33) export the first high positive pressure of high-voltage positive electrode signal output part (PB)
Pole signal, and pass through second port (N1 '), the 3rd sampling resistor (R3), the first negative input (N1A), the 3rd stationary contact
(44) and the second movable contact (66) exports the first high voltage negative signal of high voltage negative signal output part (NB), the 3rd obtaining
Voltage between test point (P2) and the second test point (N1)；
Second contact (KN) state determines the first circuit, for according to second voltage (V_P1N2), determining at the second contact (KN)
Before closure, the second contact (KN) whether adhesion, after the second contact (KN) closure, whether the second contact (KN) closure is reliable；Institute
Stating second voltage (V_P1N2) is：Connect in the first movable contact (33) and the second stationary contact (22), and the second movable contact (66) with
When 4th stationary contact (55) is connected, according to by first port (P1 '), the second sampling resistor (R2), the second electrode input end
(P1A), the second stationary contact (22) and the first movable contact (33) export the second high positive pressure of high-voltage positive electrode signal output part (PB)
Pole signal, and pass through the 4th port (N2 '), the 4th sampling resistor (R4), the second negative input (N2A), the 4th stationary contact
(55) and the second movable contact (66) exports the second high voltage negative signal of high voltage negative signal output part (NB), first obtaining
Voltage between test point (P1) and the 4th test point (N2).
6. as claimed in claim 4 detection high voltage connector contacts status circuit it is characterised in that described multi-pass operation also
Including：In synchronization, by the first high-voltage positive electrode signal acquisition circuit and the second high voltage negative signal acquisition circuit, with contact shape
State determines that circuit (300) is connected；Or, in synchronization, by the second high-voltage positive electrode signal acquisition circuit and the first high voltage negative letter
With contacts status, number Acquisition Circuit, determines that circuit (300) is connected；
Described contacts status determine that circuit (300) is additionally operable to：
According to the first high-voltage positive electrode signal collecting after connecting and the second high voltage negative signal, determine tertiary voltage (V_
P2N2)；Described tertiary voltage (V_P2N2) is：Connect with the first stationary contact (11) in the first movable contact (33), and second is dynamic tactile
When point (66) is connected with the 4th stationary contact (55), according to by the 3rd port (P2 '), the first sampling resistor (R1), the first positive pole
Input (P2A), the first stationary contact (11) and the first movable contact (33) export the first of high-voltage positive electrode signal output part (PB)
High-voltage positive electrode signal, and by the 4th port (N2 '), the 4th sampling resistor (R4), the second negative input (N2A), the 4th
Stationary contact (55) and the second movable contact (66) export the second high voltage negative signal of high voltage negative signal output part (NB), obtain
The 3rd test point (P2) and the 4th test point (N2) between voltage；
According to the second high-voltage positive electrode signal collecting after connecting and the first high voltage negative signal, determine the 4th voltage (V_
P1N1)；Described 4th voltage (V_P1N1) is：Connect with the second stationary contact (22) in the first movable contact (33), and second is dynamic tactile
When point (66) is connected with the 3rd stationary contact (44), according to by first port (P1 '), the second sampling resistor (R2), the second positive pole
The second high-voltage positive electrode signal that input (P1A), the second stationary contact (22) and the first movable contact (33) export, and pass through second
Port (N1 '), the 3rd sampling resistor (R3), the first negative input (N1A), the 3rd stationary contact (44) and the second movable contact (66)
First high voltage negative signal of output, the voltage between the first test point (P1) obtaining and the second test point (N1)；
According to described tertiary voltage (V_P2N2) and the 4th voltage (V_P1N1), determine the first contact and the state of the second contact.
7. the circuit of detection high voltage connector contacts status as claimed in claim 3 is it is characterised in that described positive pole timesharing is selected
Logical device includes：
First light coupling relay, is connected with described first electrode input end (P2A), in the first drive signal (DRV_P1)
Under driving, the first high-voltage positive electrode signal acquisition circuit and contacts status are determined that circuit (300) is connected；
Second light coupling relay, is connected with described second electrode input end (P1A), in the second drive signal (DRV_P2)
Under driving, the second high-voltage positive electrode signal acquisition circuit and contacts status are determined that circuit (300) is connected；
Described negative pole timesharing gating device includes：
3rd light coupling relay, is connected with described second negative input (N2A), in fourth drive signal (DRV_N2)
Under driving, the second high voltage negative signal acquisition circuit and contacts status are determined that circuit (300) is connected；
4th light coupling relay, is connected with described first negative input (N1A), in the 3rd drive signal (DRV_N1)
Under driving, the first high voltage negative signal acquisition circuit and contacts status are determined that circuit (300) is connected.
8. the circuit of detection high voltage connector contacts status as claimed in claim 7 is it is characterised in that described first optocoupler continues
Electrical equipment includes：First light emitting diode (201), positive pole is connected with the first drive circuit, minus earth；First light-receiving device
(205), the first pin (a) of described first light-receiving device (205) is connected with described first electrode input end (P2A)；Described first
Drive circuit exports described first drive signal (DRV_P1)；
Described second light coupling relay includes：Second light emitting diode (202), positive pole is connected with the second drive circuit, and negative pole connects
Ground；Second light-receiving device (206), the three-prong (c) of described second light-receiving device (206) and the second pipe of the first light-receiving device (205)
Pin (b), high-voltage positive electrode signal output part (PB) connect, and the 4th pin (d) of described second light-receiving device (206) is with described second just
Pole input (P1A) connects；Described second drive circuit exports described second drive signal (DRV_P2)；
Described 3rd light coupling relay includes：3rd light emitting diode (203), positive pole is connected with the 3rd drive circuit, and negative pole connects
Ground；3rd light-receiving device (207), the 5th pin (e) of described 3rd light-receiving device (207) and described second negative input (N2A)
Connect；Described 3rd drive circuit exports described 3rd drive signal (DRV_N2)；
Described 4th light coupling relay includes：4th light emitting diode (204), positive pole is connected with the 4th drive circuit, and negative pole connects
Ground；4th light-receiving device (208), the of the 7th pin (g) of described 4th light-receiving device (208) and described 3rd light-receiving device (207)
Six pins (f), high voltage negative signal output part (NB) connect, the 8th pin (h) of described 4th light-receiving device (208) and described the
One negative input (N1A) connects；Described 4th drives fourth drive signal (DRV_N1) described in circuit output.
9. the circuit of detection high voltage connector contacts status as claimed in claim 8 is it is characterised in that described contacts status are true
Determine circuit (300) to include：
First contact (KP) state determines second circuit, for according to first voltage (V_P2N1), determining at the first contact (KP)
Before closure, the first contact (KP) whether adhesion, after the first contact (KP) closure, whether the first contact (KP) closure is reliable；Institute
Stating first voltage (V_P2N1) is：Under the triggering of the first light emitting diode (201), the first light-receiving device (205) turns on, and the
Under the triggering of four light emitting diodes (204), during the 4th light-receiving device (208) conducting, according to by the 3rd port (P2 '), first adopt
Sample resistance (R1), the first electrode input end (P2A), the first pin (a) of the first light-receiving device (205) and the output of the second pin (b)
To the first high-voltage positive electrode signal of high-voltage signal output end (PB), and pass through second port (N1 '), the 3rd sampling resistor
(R3), the first negative input (N1A), the 8th pin (h) of the 4th light-receiving device (208) and the 7th pin (g) export high pressure
First high voltage negative signal of negative signal output end (NB), between the 3rd test point (P2) obtaining and the second test point (N1)
Voltage；
Second contact (KN) state determines second circuit, for according to second voltage (V_P1N2), determining at the second contact (KN)
Before closure, the second contact (KN) whether adhesion, after the second contact (KN) closure, whether the second contact (KN) closure is reliable；Institute
Stating second voltage (V_P1N2) is：Under the triggering of the second light emitting diode (202), the second light-receiving device (206) turns on, and the
Under the triggering of three light emitting diodes (203), during the 3rd light-receiving device (207) conducting, according to by first port (P1 '), second adopt
Sample resistance (R2), the second electrode input end (P1A), the 4th pin (d) of the second light-receiving device (206) and three-prong (c) export
To the second high-voltage positive electrode signal of high-voltage signal output end (PB), and pass through the 4th port (N2 '), the 4th sampling resistor
(R4), the second negative input (N2A), the 5th pin (e) of the 3rd light-receiving device (207), the 6th pin (f) export high pressure and bear
Second high voltage negative signal of pole signal output part (NB), between the first test point (P1) obtaining and the 4th test point (N2)
Voltage.
10. the circuit of detection high voltage connector contacts status as claimed in claim 8 is it is characterised in that described multi-pass operation
Also include：In synchronization, by the first high-voltage positive electrode signal acquisition circuit and the second high voltage negative signal acquisition circuit, with contact
State determination circuit (300) is connected；Or, in synchronization, by the second high-voltage positive electrode signal acquisition circuit and the first high voltage negative
With contacts status, signal acquisition circuit, determines that circuit (300) is connected；
Described contacts status determine that circuit (300) is additionally operable to：
According to the first high-voltage positive electrode signal collecting after connecting and the second high voltage negative signal, determine tertiary voltage (V_
P2N2)；Described tertiary voltage (V_P2N2) is：Under the triggering of the first light emitting diode (201), the first light-receiving device (205) is led
Logical, and under the triggering of the 3rd light emitting diode (203), during the 3rd light-receiving device (207) conducting, according to by the 3rd port
(P2 '), the first sampling resistor (R1), the first electrode input end (P2A), first pin (a) and second of the first light-receiving device (205)
Pin (b) exports the first high-voltage positive electrode signal of high-voltage signal output end (PB), and by the 4th port (N2 '), the 4th
Sampling resistor (R4), the second negative input (N2A), the 5th pin (e) of the 3rd light-receiving device (207), the 6th pin (f) output
To the second high voltage negative signal of high voltage negative signal output part (NB), the 3rd test point (P2) obtaining and the 4th test point
(N2) voltage between；
According to the second high-voltage positive electrode signal collecting after connecting and the first high voltage negative signal, determine the 4th voltage (V_
P1N1)；Described 4th voltage (V_P1N1) is：Under the triggering of the second light emitting diode (202), the second light-receiving device (206) is led
Logical, and under the triggering of the 4th light emitting diode (204), during the 4th light-receiving device (208) conducting, according to by first port
(P1 '), the second sampling resistor (R2), the second electrode input end (P1A), the 4th pin (f) and the 3rd of the second light-receiving device (206)
Pin (e) exports the second high-voltage positive electrode signal of high-voltage signal output end (PB), and by second port (N1 '), the 3rd
Sampling resistor (R3), the first negative input (N1A), the 8th pin (h) of the 4th light-receiving device (208) and the 7th pin (g) are defeated
Go out the first high voltage negative signal to high voltage negative signal output part (NB), the first test point (P1) obtaining and the second detection
Voltage between point (N1)；
According to described tertiary voltage (V_P2N2) and the 4th voltage (V_P1N1), determine the first contact and the state of the second contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620709394.2U CN205941816U (en) | 2016-07-07 | 2016-07-07 | Detect circuit of high -pressure contactor contact state |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620709394.2U CN205941816U (en) | 2016-07-07 | 2016-07-07 | Detect circuit of high -pressure contactor contact state |
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| Publication Number | Publication Date |
|---|---|
| CN205941816U true CN205941816U (en) | 2017-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620709394.2U Active CN205941816U (en) | 2016-07-07 | 2016-07-07 | Detect circuit of high -pressure contactor contact state |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106872890A (en) * | 2017-03-24 | 2017-06-20 | 北京长城华冠汽车科技股份有限公司 | High voltage connector state diagnostic apparatus |
| CN107271923A (en) * | 2017-08-14 | 2017-10-20 | 中国重汽集团济南动力有限公司 | A kind of electrokinetic cell high voltage connector fault detection system and detection method |
| CN109521361A (en) * | 2019-01-18 | 2019-03-26 | 上海熠动动力科技有限公司 | A kind of relay contact adhesion detection circuit and its detection device |
| CN110456263A (en) * | 2019-08-02 | 2019-11-15 | 恒大智慧充电科技有限公司 | A kind of relay is adhered detection circuit, device and its detection method |
| US11150302B2 (en) | 2019-02-25 | 2021-10-19 | Contemporary Amperex Technology Co., Limited | High voltage detection circuit and method |
| CN114280470A (en) * | 2021-12-02 | 2022-04-05 | 苏州博沃创新能源科技有限公司 | State detection method, isolation detection circuit and equipment for electric vehicle relay |
| WO2024041059A1 (en) * | 2022-08-25 | 2024-02-29 | 深圳威迈斯新能源股份有限公司 | Adhesion detection and voltage difference measurement circuit for relay |
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2016
- 2016-07-07 CN CN201620709394.2U patent/CN205941816U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106872890A (en) * | 2017-03-24 | 2017-06-20 | 北京长城华冠汽车科技股份有限公司 | High voltage connector state diagnostic apparatus |
| CN106872890B (en) * | 2017-03-24 | 2019-05-03 | 北京长城华冠汽车科技股份有限公司 | High voltage connector state diagnostic apparatus |
| CN107271923A (en) * | 2017-08-14 | 2017-10-20 | 中国重汽集团济南动力有限公司 | A kind of electrokinetic cell high voltage connector fault detection system and detection method |
| CN109521361A (en) * | 2019-01-18 | 2019-03-26 | 上海熠动动力科技有限公司 | A kind of relay contact adhesion detection circuit and its detection device |
| US11150302B2 (en) | 2019-02-25 | 2021-10-19 | Contemporary Amperex Technology Co., Limited | High voltage detection circuit and method |
| CN110456263A (en) * | 2019-08-02 | 2019-11-15 | 恒大智慧充电科技有限公司 | A kind of relay is adhered detection circuit, device and its detection method |
| CN114280470A (en) * | 2021-12-02 | 2022-04-05 | 苏州博沃创新能源科技有限公司 | State detection method, isolation detection circuit and equipment for electric vehicle relay |
| WO2024041059A1 (en) * | 2022-08-25 | 2024-02-29 | 深圳威迈斯新能源股份有限公司 | Adhesion detection and voltage difference measurement circuit for relay |
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