CN102520305A - Intelligent detection method for open circuit of connection line between charger and battery - Google Patents
Intelligent detection method for open circuit of connection line between charger and battery Download PDFInfo
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- CN102520305A CN102520305A CN2011104240706A CN201110424070A CN102520305A CN 102520305 A CN102520305 A CN 102520305A CN 2011104240706 A CN2011104240706 A CN 2011104240706A CN 201110424070 A CN201110424070 A CN 201110424070A CN 102520305 A CN102520305 A CN 102520305A
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Abstract
The invention discloses an intelligent detection method for open circuit of a connection line between a charger and a battery. The method comprises the following steps of: firstly, executing state detection and information fusion on the charger and the battery through an intelligent detection system, and judging the specific working state of the charger; secondly, taking corresponding detection schemes according to different working states of the charger by a decision making system; and finally, judging the open circuit conditions of the connection line between the charger and the battery according to the detection result by the intelligent detection system. Moreover, the intelligent detection system in the invention can be used as a functional module and realized by being integrated in a large digitalized system. So, the detection system is lower in cost.
Description
Technical field
The present invention relates to the detection of connecting line open circuit between emergency power charger and the battery, the intelligent detecting method of connecting line open circuit between particularly a kind of charger and the battery.
Background technology
Along with the implementation of country's up-to-date " fire emergency and evacuation indication system " standard, in the power supply industry, the detection of connecting line open circuit receives increasing attention between emergency power charger and the battery.But, judge through detecting the battery voltage at present more generally whether open open circuit that the state of auxiliary contact judges both connecting lines through detecting the battery sky about the detection method of connecting line open circuit between emergency power charger and the battery.
Conventional detection does not fully take into account the residing duty of charger, is that the single voltage to the battery two ends detects.Because the connecting line open circuit situation is complicated between charger and the battery, the point that open circuit takes place is also more.Therefore, present detection method is the open circuit situation that is difficult to accomplish to detect comprehensively, reliably connecting line between charger and the battery; Below several kinds of charger states, conventional detection all can not accurately be judged open circuit situation between the two:
(1) when charger quits work, if the simple detection battery voltage that relies on judges that the connecting line open circuit is not enough between charger and the battery; The open circuit of connecting line occurs near the charger end between battery and charger, but can detect the magnitude of voltage at battery two ends, and CPU judges that in view of the above connecting line is less than open circuit between the two, and obviously the result and the actual conditions of CPU judgement are antipodal.
(2) be in when all filling the stage at battery, the charge circuit electric current is invariable, and the battery voltage changes.Therefore, if CPU only judges that through the magnitude of voltage that detects the battery two ends open circuit of connecting line between charger and the battery also is inaccurate.
(3) be in floating charge during the stage at battery, because the voltage at battery two ends changes hardly, the charge circuit electric current changes also extremely small.Therefore, the simple magnitude of voltage that detects the battery two ends that relies on is judged the open circuit situation of connecting line between the two, is very difficult.
Summary of the invention
The objective of the invention is to overcome the shortcoming of prior art; The intelligent detecting method of connecting line open circuit between a kind of charger and the battery is provided; Said detection method is comprehensive; Testing result is reliable, can prevent effectively to cause emergency power pack under case of emergency, can not really play a role because of connecting line open circuit between charger and the battery.
For reaching above-mentioned purpose, the intelligent detecting method of connecting line open circuit between a kind of charger provided by the invention and the battery, the technical scheme below adopting: detection method according to the invention comprises the steps:
Step 1: detect and information fusion through the state of intelligent checking system earlier, judge the concrete duty of charger to charger and battery; If charger quits work, then get into step 2; If charger is in running order, then get into step 3;
Step 2: send the instruction of detection by CPU, voltage is arranged, judge that then the connecting line between charger and the battery is communicated with when detecting between the connecting line of said charger two ends near voltage between the connecting line of charger two ends; When system detects no-voltage between the connecting line of said charger two ends, then judge the connecting line open circuit between charger and the battery, and then get into step 6;
Step 3: detect charger through CPU and whether be in floating charge state,, get into step 4 if charger is in floating charge state; If charger is not in floating charge state, get into step 5;
Step 4: charger is in floating charge state; Then judge the open circuit situation of connecting line between charger and the battery: a, adopt the method that detects the charging voltage fluctuation to judge the open circuit situation of connecting line between charger and the battery, detect the back that finishes and get into step 6 through two kinds of methods; B, in the connecting line loop, seal in an electronic switch, the timing through CPU control electronic switch turns on and off, and judges the open circuit situation of connecting line between charger and the battery through detecting IGBT voltage recovery situation, detects the back that finishes and gets into step 6;
Step 5: charger is in the state that all fills, and CPU sends the instruction that detects the charge circuit electric current, if it is constant detecting loop current, then the decidable charger is communicated with connecting line between the battery; Otherwise promptly the open circuit of the connecting line between decidable charger and the battery detects the back that finishes and gets into step 6;
Step 6: accomplish and detect.
Further, detection method a concrete operations step is in the said step 4: the voltage that at first detects the charger two ends through CPU; Whether next magnitude of voltage of observing the CPU detection takes place than great fluctuation process; Whether stablize the open circuit situation of judging connecting line between charger and the battery according to voltage then; When detecting the charger voltage, CPU takes place than great fluctuation process; The connecting line between decidable charger and battery open circuit then, otherwise be the decidable charger with battery between connecting line be communicated with.
Further, detection method b concrete operations step is in the said step 4: at first seal in an electronic switch in the connecting line loop between charger and battery; Secondly the timing through CPU control electronic switch turns on and off, and detects IGBT voltage value; Judge the open circuit situation of connecting line between charger and the battery at last through comparing voltage value.If the IGBT voltage recovers consistent before and after the cut-off loop electronic switch, then the decidable charger is communicated with connecting line between the battery; Otherwise then connecting line is opened a way between decidable charger and the battery.
The invention has the beneficial effects as follows: the present invention adopts the theory of information fusion, under the prerequisite of the multiple information that merges battery and charger system, judges battery and the charger open circuit situation of line between the two through decision system comprehensively.Take to judge the open circuit situation of connecting line between the two according to charger different working state in the value of different check point sampled voltages or electric current.Adopt this intelligent detecting method to detect the open circuit situation of connecting line between charger and the battery, can guarantee the reliability that detects.
In addition, the intelligent checking system among the present invention can be used as a functional module, is integrated in the big digitization system and realizes.So the cost of this detection system is lower.
Description of drawings
Shown in Figure 1 is intelligent detecting method process flow diagram of the present invention.
Shown in Figure 2 is intelligent checking system device synoptic diagram of the present invention.
Embodiment
For further understanding characteristic of the present invention, technological means and the specific purposes that reached, function, resolve advantage of the present invention and spirit, by the present invention being carried out illustrated in detail below in conjunction with accompanying drawing and embodiment.
Shown in Figure of description 1, the intelligent detecting method of connecting line open circuit between a kind of charger of the present invention and the battery, concrete comprises the steps:
⑴, at first charger is monitored through CPU; Judge whether charger quits work; If charger does not quit work, then further judge the residing duty of charger, promptly be: said charger is in the floating charge duty or is in and all fills duty.
⑵, adopt corresponding with it concrete detection scheme to judge the open circuit situation of connecting line between charger and the battery according to each concrete duty of step charger that ⑴ detects.
⑶, detection finish.
Be in when quitting work state when CPU detects charger, detection method is: at first send the instruction of detection near voltage between the line of charger two ends by CPU; Sampling the magnitude of voltage here again; Judge through sampled voltage then.When detecting charger two ends connecting line voltage is arranged, judge that then connecting line is communicated with between the two; When detection charger two ends connecting line did not have voltage, then judgement connecting line was between the two opened a way, and detects and finishes.
When charger is worked, floating charge is then arranged and all fill two kinds of duties.If charger is in floating charge state, then the variation of the electric current in the charge circuit is very little, and the voltage at battery two ends is almost constant.Therefore; Judge the open circuit situation of connecting line between charger and the battery; Can not rely on the electric current in the voltage that detects the battery two ends and loop to change merely and judge the open circuit situation of connecting line between the two, the present invention proposes following two kinds of detection methods of judging connecting line open circuit between chargers and the battery:
Scheme a:, adopt the method that detects the charging voltage fluctuation to judge the open circuit situation of connecting line between charger and the battery through the voltage at CPU sampling charger two ends.It is constant basically that common CPU sampling charger two ends connect voltage, and still, in case battery and charger break off suddenly, then the voltage at charger two ends can be undergone mutation, the magnitude of voltage at charger two ends when its two ends can be higher than floating charge suddenly.Therefore, if bigger variation has taken place CPU sampling charger voltage value, then open circuit has taken place in connecting line between decidable charger and the battery; Otherwise, decidable between the two connecting line be communicated with.
Scheme b: at first in charger and cell circuit, seal in an electronic switch; The timing of controlling electronic switch through CPU again turns on and off, and sampled I GBT voltage.Judge the open circuit situation of connecting line between charger and the battery through comparing the IGBT voltage at last.If break off the IGBT voltage height after the voltage ratio at the preceding IGBT two ends of electronic switch is turn-offed certain hour; And close electronic switch after a period of time, and IGBT voltage value returns to the magnitude of voltage that turn-offs IGBT two ends before the electronic switch again, and then connecting line is communicated with between decidable charger and the battery; Otherwise the magnitude of voltage of three time point detections reduces successively, and then connecting line is opened a way between decidable charger and the battery.
If charger is in the state that all fills, CPU sends the instruction that detects the charge circuit electric current, and when detected electric current is constant, then connecting line is communicated with between decidable charger and the battery; Otherwise, promptly decidable between the two connecting line open a way.
Shown in Figure of description 2, CPU is the core of intelligent checking system, and the detection of line open circuit situation has three kinds of situation between charger and the battery, is respectively quit work state, charger of charger and is in and all fills state and charger is in floating charge state.
Intelligent checking system sends corresponding decision instruction through the monitoring to charger.Be in when quitting work state when detecting charger, send the instruction that detects voltage between the B point line, voltage is arranged, explain that then charger is communicated with line between the battery if detect between the B point line by CPU; Otherwise, can judge that line is opened a way between charger and the battery.
When intelligent checking system detects charger is when being in the bulk charge state; Send the instruction that detects charge circuit L electric current by CPU; Shown in Figure of description 2; Connect current sensing means (like current Hall) at the D point, electric current is constant if current sensing means detects the D point, can judge that then line is communicated with between charger and the battery; Otherwise, can judge that line is opened a way between charger and the battery.
When intelligent checking system detects charger is when being in floating charge state, because the voltage at battery two ends do not change basically, and the electric current of charge circuit does not almost change yet.Therefore, specifically can be divided into following two kinds of detection schemes.
First kind of detection scheme does; Shown in Figure of description 2; At first in whole charge circuit (being D point place) series connection one electronic switch; Control the timing that electronics opens through CPU and turn on and off, and the open circuit of judging line between the two through the way that detects IGBT voltage (being the C point voltage) whether.If before turn-offing D place electronic switch, detecting C point magnitude of voltage this moment is U1; Turn-off electronic switch after a period of time (as 10 minutes), detecting C point magnitude of voltage this moment is U2; The switch at D place that then closes, after after a while (as 10 minutes) again, detecting C point magnitude of voltage this moment is U3.Above-mentioned three different moment point magnitudes of voltage are approximate to satisfy relational expression: U3=U1 if CPU detects>U2, can judge that then line is communicated with between charger and the battery.If CPU is (are U1>U2>U3) of reducing successively in above-mentioned three different detected C point voltage values constantly, can judge that then line is opened a way between charger and the battery.
Second kind of detection scheme is to adopt the method that detects the charging voltage fluctuation to judge the open circuit situation of line between charger and the battery.If in sampling process, to sample charger voltage (being the B point voltage) is constant basically to CPU, can judge that then line is communicated with between charger and the battery; If the magnitude of voltage that CPU sampling B is ordered raises suddenly, can judge that then line is opened a way between charger and the battery.
In sum; The present invention is considering under the duty prerequisite of charger comprehensively; Take to judge the open circuit situation of connecting line between charger and the battery according to charger different working state, made corresponding, reliable detection scheme to the residing different operating state of charger in the value of different check point sampled voltages or electric current.Three kinds of duties of charger are to balance each other, independently, wherein a kind of specific embodiments that present embodiment just proposes according to Figure of description.
The above embodiment has only expressed part embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as limitation of the scope of the invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with accompanying claims.
Claims (3)
1. the intelligent detecting method of connecting line open circuit between charger and the battery, it is characterized in that: said detection method comprises the steps:
Step 1: detect and information fusion through the state of intelligent checking system earlier, judge the concrete duty of charger to charger and battery; If charger quits work, then get into step 2; If charger is in running order, then get into step 3;
Step 2: send the instruction of detection by CPU, voltage is arranged, judge that then the connecting line between charger and the battery is communicated with when detecting between the connecting line of said charger two ends near charger two ends connecting line voltage; When detecting no-voltage between the connecting line of said charger two ends, then judge the connecting line open circuit between charger and the battery, and then get into step 6;
Step 3: detect charger through CPU and whether be in floating charge state,, get into step 4 if charger is in floating charge state; If charger is not in floating charge state, get into step 5;
Step 4: charger is in floating charge state, then judges the open circuit situation of connecting line between charger and the battery: a through two kinds of methods, adopts the method that detects the charging voltage fluctuation to judge the open circuit situation of connecting line between charger and the battery; After finishing, detection gets into step 6; B, in the connecting line loop, seal in an electronic switch, the timing through CPU control electronic switch turns on and off, and judges the open circuit situation of connecting line between charger and the battery through detecting IGBT voltage recovery situation; After finishing, detection gets into step 6;
Step 5: charger is in the state that all fills, and CPU sends the instruction that detects the charge circuit electric current, if it is constant detecting electric current, then the decidable charger is communicated with connecting line between the battery; Otherwise promptly the open circuit of the connecting line between decidable charger and the battery detects the back that finishes and gets into step 6;
Step 6: accomplish and detect.
2. the intelligent detecting method of connecting line open circuit between a kind of charger according to claim 1 and the battery, it is characterized in that: detection method a concrete operations step is in the said step 4: the voltage that at first detects the charger two ends through CPU; Whether next observes the voltage that CPU detects and takes place than great fluctuation process; Whether judge the open circuit situation of connecting line between charger and the battery then according to voltage fluctuation; When CPU detects the charger voltage and takes place than great fluctuation process, the open circuit of the connecting line between decidable charger and the battery then, otherwise be the decidable charger with battery between connecting line be communicated with.
3. the intelligent detecting method of connecting line open circuit between a kind of charger according to claim 1 and the battery, it is characterized in that: detection method b concrete operations step is in the said step 4: at first seal in an electronic switch in the connecting line loop between charger and battery; Secondly the timing through CPU control electronic switch turns on and off, and detects the magnitude of voltage at IGBT two ends; Judge the open circuit situation of connecting line between the two through IGBT voltage value before and after comparing switch on and off at last; If the IGBT voltage recovers consistent before and after the cut-off loop electronic switch, then the decidable charger is communicated with connecting line between the battery; If the IGBT voltage does not recover consistent before and after the cut-off loop electronic switch, then connecting line is opened a way between decidable charger and the battery.
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| CN2011104240706A CN102520305B (en) | 2011-12-19 | 2011-12-19 | Intelligent detection method for open circuit of connection line between charger and battery |
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| CN2011104240706A CN102520305B (en) | 2011-12-19 | 2011-12-19 | Intelligent detection method for open circuit of connection line between charger and battery |
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