CN104442406A - Method for judging adhesion of high-voltage relay - Google Patents
Method for judging adhesion of high-voltage relay Download PDFInfo
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- CN104442406A CN104442406A CN201410599918.2A CN201410599918A CN104442406A CN 104442406 A CN104442406 A CN 104442406A CN 201410599918 A CN201410599918 A CN 201410599918A CN 104442406 A CN104442406 A CN 104442406A
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Abstract
The invention provides a method for judging adhesion of a high-voltage relay. According to the adhesion judgment problem of the relay without an auxiliary contact, before the normal high voltage is provided, whether adhesion of the relay exists or not is judged through the voltage change conditions, reported by a motor controller, of the two ends of a motor, the true voltage change condition of a load on a whole vehicle outside a battery can be truly reflected, the relay adhesion condition can be found in time, and potential safety hazards caused by the fact that devices of the whole vehicle are provided with the high voltage after power is off are avoided.
Description
Technical field
The present invention relates to a kind of high-voltage relay detection field, particularly a kind of method judging high-voltage relay adhesion.
Background technology
The detection of battery management system (BMS) to the relay mode of operation in its high-pressure system powers on to electric automobile power battery high pressure, can lower electric process normally carry out extremely important, if high-voltage relay sticks together, then because of car load device band high pressure, and potential safety hazard can be caused during electricity under electrokinetic cell; Current relay adhesion judges substantially all to adopt the relay of band secondary contact to judge, but because present electronlmobil much selects the relay not with secondary contact, therefore the original method judged by the adhesion of feedback signal to relay of direct-detection secondary contact is inapplicable.
Summary of the invention
In view of this, the technical problem to be solved in the present invention is to provide the method for the judgement high-voltage relay adhesion of the adhesion situation of a kind of judgement not with secondary contact relay.
For solving the problems of the technologies described above, technical scheme provided by the invention is: a kind of method judging high-voltage relay adhesion, comprises the steps:
A. battery management system low pressure carries out self-inspection after powering on;
B. after battery management system self-inspection completes, detect the init state that electric machine controller reports, to judge within the first period whether initialization completes electric machine controller, if then time delay second period initialization completion signal is reported to entire car controller, and detect the magnitude of voltage at the motor two ends that electric machine controller reports, be designated as V1, then enter next step; Then long for electric machine controller initialization time breakdown signal is reported to entire car controller if not, and stops powering on flow process;
C. the high pressure receiving entire car controller when battery management system powers on after instruction, time delay the 3rd period, detects the magnitude of voltage at the motor two ends that electric machine controller reports, is designated as V2;
D. battery management system judges whether magnitude of voltage V2 is greater than magnitude of voltage V1, if then judge that anode relay and negative pole relay exist the situation of adhesion simultaneously, this fault is reported entire car controller, and stops powering on flow process; Then enter next step if not;
E. battery management system controls preliminary filling relay closes, detects the magnitude of voltage at the motor two ends that electric machine controller reports, be designated as V3 after time delay the 4th period;
F. battery management system judges whether magnitude of voltage V3 is greater than magnitude of voltage V2, if then judge that negative pole relay exists the situation of adhesion, reports entire car controller by this fault, and stops powering on flow process; Then enter next step if not;
G. battery management system controls the disconnection of preliminary filling relay, then controls negative pole relay closes, and detects the magnitude of voltage at the motor two ends that electric machine controller reports, be designated as V4.
H. battery management system judges whether magnitude of voltage V4 is greater than magnitude of voltage V3, if then judge that anode relay exists the situation of adhesion, reports entire car controller by this fault, and stops powering on flow process; Otherwise enter the flow process that powers on normally.
As further prioritization scheme, go back the 5th period of time delay after closed preliminary filling relay in described step e, and by the state reporting of preliminary filling relay closes to entire car controller, time delay surveys voltage more afterwards.
As further prioritization scheme, the 5th period of time delay respectively after described step G breaks preliminary filling relay and after closed negative pole relay, and comprise and preliminary filling relay being disconnected and the step of state reporting entire car controller of negative pole relay closes;
As further prioritization scheme, be handled as follows after reporting the situation of negative pole relay adhesion to entire car controller in described step F: disconnect preliminary filling relay, the state reporting disconnected by preliminary filling relay after delay control five period is to entire car controller, continue to report negative pole relay failure condition to entire car controller again, and no longer carry out normal high pressure and power on.
As further prioritization scheme, be handled as follows after reporting the situation of anode relay adhesion to entire car controller in described step H: disconnect negative pole relay, by the state reporting entire car controller of negative pole relay disconnection after delay control five period, then continue to report anode relay failure condition, and no longer carry out normal high pressure and power on.
In described control determination methods, described anode relay can be positive pole relay or preliminary filling relay, also can be positive pole relay and preliminary filling relay.
First period of above-mentioned time delay, the second period, the 3rd period, the 4th period and the 5th period set according to actual conditions, generally, first period can be set as 10 ~ 30 seconds, second period can be set as 300 ~ 600 milliseconds, 3rd period can be set as 100 ~ 300 milliseconds, 4th period can be set as 100 ~ 200 milliseconds, and the 5th period can be set as 20 ~ 100 milliseconds.
Compared with prior art, tool of the present invention has the following advantages:
1, for the relay adhesion decision problem not with secondary contact, adopt the method that difference judges, on normally before high pressure, the change of voltage situation at the electric machine controller two ends reported by electric machine controller, judge whether relay exists the problem of adhesion, can the truth of the change of voltage of capacitor element above the outside car load of more real reaction cell, the situation of adhesion can be there is by Timeliness coverage relay, prevent because of car load device band high pressure after lower electricity, the potential safety hazard caused.
2, judged the situation of change of the voltage that MCU reports by substep, judge whether there is individual process of charging to the electric capacity of motor, if there is process of charging, then the situation that there is relay adhesion is described, the health condition of power brick inspection relay need be opened.
3, on often subnormal high pressure process in carry out the judgement of relay adhesion, and the flow process that no longer normally powers on when there is relay adhesion, so that can Timeliness coverage Problems existing when user uses.
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention electrical block diagram;
Fig. 2 is embodiment of the present invention determination methods diagram of circuit.
Detailed description of the invention
The present invention to be explained in further detail below in conjunction with accompanying drawing and embodiment for the ease of it will be appreciated by those skilled in the art that.
Embodiment
Be illustrated in figure 1 power battery pack H1, battery management system high-voltaghe compartment H2 and electric automobile motor system H3 connection diagram, wherein battery management system high-voltaghe compartment H2 comprises battery management system (BMS), and be connected to the positive pole relay K 1 of its inner total anode, be connected to the negative pole relay K 2 of its inner total negative terminal, also comprise preliminary filling relay K 4 and the preliminary filling resistance R of the mutual series connection being parallel to positive pole relay K 1 two ends, also comprise one end and connect negative pole relay K 2, the electric machine control relay K 3 that other end connection control electric automobile motor system H3 opens and disconnects, electric automobile motor system H3 comprises electric machine controller (MCU) and is parallel to the electric capacity C at electric machine controller two ends.
As shown in Figure 2, a kind of method judging high-voltage relay adhesion, comprises the steps:
A. battery management system low pressure carries out self-inspection after powering on;
B. after battery management system self-inspection completes, detect the init state that electric machine controller reports, to judge in 20 seconds whether initialization completes electric machine controller, if then time delay 500 milliseconds initialization completion signal is reported to entire car controller (VCU), and detect the magnitude of voltage at the motor two ends that electric machine controller reports, be designated as V1, then enter next step; Then long for electric machine controller initialization time breakdown signal is reported to entire car controller if not, and stops powering on flow process;
C. the high pressure receiving entire car controller when battery management system powers on after instruction, and time delay 200 milliseconds detects the magnitude of voltage at the motor two ends that electric machine controller reports, is designated as V2;
D. battery management system judges whether magnitude of voltage V2 is greater than magnitude of voltage V1, if then judge that anode relay and negative pole relay exist the situation of adhesion simultaneously, this fault is reported entire car controller, and stops powering on flow process; Then enter next step if not;
E. battery management system controls preliminary filling relay closes, time delay 50 milliseconds, and by the state reporting of preliminary filling relay closes to entire car controller, and then time delay 150 milliseconds detects the magnitude of voltage at the motor two ends that electric machine controller reports afterwards, is designated as V3;
F. battery management system judges whether magnitude of voltage V3 is greater than magnitude of voltage V2, if then judge that negative pole relay exists the situation of adhesion, then preliminary filling relay is disconnected, the state reporting disconnected by preliminary filling relay after postponing 50 milliseconds is to entire car controller, continue to report negative pole relay failure condition to entire car controller again, and stop powering on flow process; Then enter next step if not;
G. battery management system controls the disconnection of preliminary filling relay, by the state reporting entire car controller of preliminary filling relay disconnection after time delay 50 milliseconds, then negative pole relay closes is controlled, by the state reporting entire car controller of negative pole relay closes after time delay 50 milliseconds, then detect the magnitude of voltage at the motor two ends that electric machine controller reports, be designated as V4.
H. battery management system judges whether magnitude of voltage V4 is greater than magnitude of voltage V3, if then judge that anode relay exists the situation of adhesion, disconnect negative pole relay, by the state reporting entire car controller of negative pole relay disconnection after postponing 50 milliseconds, then continue to report anode relay failure condition, stop powering on flow process; Otherwise enter the flow process that powers on normally.
In described control determination methods, described anode relay can be positive pole relay or preliminary filling relay, also can be positive pole relay and preliminary filling relay.
Be more than wherein specific implementation of the present invention, it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these apparent replacement forms all belong to protection scope of the present invention.
Claims (6)
1. judge a method for high-voltage relay adhesion, it is characterized in that, comprise the steps:
A. battery management system low pressure carries out self-inspection after powering on;
B. after battery management system self-inspection completes, detect the init state that electric machine controller reports, to judge within the first period whether initialization completes electric machine controller, if then time delay second period initialization completion signal is reported to entire car controller, and detect the magnitude of voltage at the motor two ends that electric machine controller reports, be designated as V1, then enter next step; Then long for electric machine controller initialization time breakdown signal is reported to entire car controller if not, and stops powering on flow process;
C. the high pressure receiving entire car controller when battery management system powers on after instruction, time delay the 3rd period, detects the magnitude of voltage at the motor two ends that electric machine controller reports, is designated as V2;
D. battery management system judges whether magnitude of voltage V2 is greater than magnitude of voltage V1, if then judge that anode relay and negative pole relay exist the situation of adhesion simultaneously, this fault is reported entire car controller, and stops powering on flow process; Then enter next step if not;
E. battery management system controls preliminary filling relay closes, detects the magnitude of voltage at the motor two ends that electric machine controller reports, be designated as V3 after time delay the 4th period;
F. battery management system judges whether magnitude of voltage V3 is greater than magnitude of voltage V2, if then judge that negative pole relay exists the situation of adhesion, reports entire car controller by this fault, and stops powering on flow process; Then enter next step if not;
G. battery management system controls the disconnection of preliminary filling relay, then controls negative pole relay closes, and detects the magnitude of voltage at the motor two ends that electric machine controller reports, be designated as V4.
H. battery management system judges whether magnitude of voltage V4 is greater than magnitude of voltage V3, if then judge that anode relay exists the situation of adhesion, reports entire car controller by this fault, and stops powering on flow process; Otherwise enter the flow process that powers on normally.
2. the method for judgement high-voltage relay according to claim 1 adhesion, it is characterized in that: in described step e, after closed preliminary filling relay, go back the 5th period of time delay, and by the state reporting of preliminary filling relay closes to entire car controller, time delay surveys voltage more afterwards.
3. the method for judgement high-voltage relay according to claim 1 adhesion, it is characterized in that: the 5th period of time delay respectively after described step G breaks preliminary filling relay and after closed negative pole relay, and comprise and preliminary filling relay being disconnected and the step of state reporting entire car controller of negative pole relay closes.
4. the method for judgement high-voltage relay according to claim 1 adhesion, it is characterized in that, be handled as follows after reporting the situation of negative pole relay adhesion to entire car controller in described step F: disconnect preliminary filling relay, the state reporting disconnected by preliminary filling relay after delay control five period is to entire car controller, continue to report negative pole relay failure condition to entire car controller again, and no longer carry out normal high pressure and power on.
5. the method for judgement high-voltage relay according to claim 1 adhesion, it is characterized in that, be handled as follows after reporting the situation of anode relay adhesion to entire car controller in described step H: disconnect negative pole relay, by the state reporting entire car controller of negative pole relay disconnection after delay control five period, then continue to report anode relay failure condition, and no longer carry out normal high pressure and power on.
6. the method for judgement high-voltage relay according to claim 1 adhesion, is characterized in that: described anode relay can be positive pole relay or preliminary filling relay, also can be positive pole relay and preliminary filling relay.
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| CN201410599918.2A CN104442406B (en) | 2014-10-31 | 2014-10-31 | A kind of method for judging high-voltage relay adhesion |
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| CN104777423A (en) * | 2015-05-06 | 2015-07-15 | 科力远（上海）汽车动力电池系统有限公司 | Method for detecting state of relay in high-voltage system of nickel-hydrogen hybrid electric vehicle |
| CN105109347A (en) * | 2015-09-18 | 2015-12-02 | 惠州市亿能电子有限公司 | High-voltage power-on circuit of electric automobile, and control method of high-voltage power-on circuit |
| CN105137377A (en) * | 2015-06-30 | 2015-12-09 | 上海翼锐汽车科技有限公司 | Battery pack relay fault simulation injection test circuit |
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