CN104779581A - Anti-disturbance charging interface temperature monitoring and protecting device and protecting method thereof - Google Patents

Anti-disturbance charging interface temperature monitoring and protecting device and protecting method thereof Download PDF

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Publication number
CN104779581A
CN104779581A CN201510199836.3A CN201510199836A CN104779581A CN 104779581 A CN104779581 A CN 104779581A CN 201510199836 A CN201510199836 A CN 201510199836A CN 104779581 A CN104779581 A CN 104779581A
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digital
temperature
input
output
door
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CN201510199836.3A
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张乃凡
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张乃凡
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Abstract

The invention discloses an anti-disturbance charging interface temperature monitoring and protecting device and a protecting method thereof. The problems that in the prior art, a charging interface of a charging machine cannot be monitored or protected completely, and a charging machine protecting circuit is mistakenly connected are solved. An interface digital temperature sensor (2) is arranged in a charging interface (1) of a charging machine, and the output end of a temperature rise overrun digital comparator (11) is connected with the output end of a temperature overrun digital comparator (10) and is connected with a third input end of a first AND gate (14) after OR operation; after delaying alarming temperature by 1 s, a first digital time delayer (13) is connected with a second input end of the first AND gate (14); after delaying a starting signal of the charging machine by 3 s, a second digital time delayer (4) is connected with a first input end of the first AND gate, and the output end of the first AND gate is connected with the control end of a switching relay control coil (15) of a charging machine protecting circuit. By means of the anti-disturbance charging interface temperature monitoring and protecting device and the protecting method thereof, charging fires are effectively avoided, and the defect that the charging machine protecting circuit is mistakenly connected is also overcome.

Description

Disturbance rejection charging inlet temperature monitoring protective device and guard method thereof
Technical field
The present invention relates to a kind of temperature monitoring protective device of electric automobile charging station, particularly a kind of interface temperature monitoring and protecting device of charger of electric automobile charging station and guard method thereof.
Background technology
In electric automobile charging station, in order to ensure the charging safety of electric automobile, Real-Time Monitoring to be carried out to the temperature of the temperature of the temperature of charger, automobile batteries and controller switching equipment.Prior art, to the monitoring of the temperature of charger, only for the fuselage of charger, yet there are no the report that the special charging inlet for charger carries out temperature monitoring.Because the frequency of utilization of the charging inlet of charging station is very high, easily make the dirty dust that waits enter into interface, cause interface failure of insulation, and form short circuit current, directly cause the local temperature of charging inlet to continue to rise, lead to security incident.In existing electric automobile charging station; all be configured with the protective circuit controlling charger break-make, when charging temperature exceedes most ceiling value, protective circuit will access by the switching relay of the protective circuit of charger; stop the work of charger, avoid the generation of fire incident.Existing charger temperature over-range protective circuit; generally whether reach limit value to implement protection according to single temperature; larger in charging inlet temperature rise; but when temperature does not also reach temperature limit; protective circuit can not drop into, affect because temperature rise is excessive interface material insulation property finally bring out charging fire incident factor out in the cold.Start moment at charger, the temperature sensor as temperature element also can export pulsed disturbance output signal, when outputing signal excessive, also easily bringing out the malfunction of charger protective circuit, causing charging normal of electric automobile to be interrupted.In addition; temperature sensor in the course of the work; due to the accidental inducement of some uncertain moments; also the sudden change of output temperature signal can be caused, i.e. the disturbance of output temperature, after the accidental inducement of moment disappears; temperature signal can return to normal operating conditions again; and in this case, charge protector also usually miscarried into, the charging work of electric automobile can not normally be carried out.
Summary of the invention
The invention provides a kind of disturbance rejection charging inlet temperature monitoring protective device and guard method thereof, solve prior art to charger charging inlet monitoring and protecting not in place and moment accidental inducement easily make charger protective circuit by miscarry into technical problem.
The present invention solves above technical problem by the following technical programs:
A kind of disturbance rejection charging inlet temperature monitoring protective device, comprise charger charging inlet, charger protective circuit switching relay control coil, charging station digital temperature sensor, interface digital temperature sensor, digital subtractor, with door, or door, digital time delayer and digital comparator, interface digital temperature sensor is provided with in charger charging inlet, an input of digital subtractor and the output of interface digital temperature sensor link together, another input of digital subtractor and the output of charging station digital temperature sensor link together, a transfinite input of digital comparator of the output of digital subtractor and temperature rise links together, temperature rise transfinite digital comparator another input on input have temperature rise to transfinite duty setting signal, temperature rise transfinite digital comparator output with or the second input of door link together, an input of temperature over-range digital comparator and the output of interface digital temperature sensor link together, on another input of temperature over-range digital comparator, input has temperature over-range duty setting signal, the output of temperature over-range digital comparator with or the first input end of door link together, or the output of door and first and the 3rd input of door link together, an input of the super auxiliary limit digital comparator of temperature and the output of interface digital temperature sensor link together, on another input of the super auxiliary limit digital comparator of temperature, input has the super auxiliary limit duty setting signal of temperature, the super auxiliary limit set point of temperature is lower than temperature over-range set point 25 degree, the super output of auxiliary limit digital comparator of temperature and the input of the first digital time delayer link together, the output of the first digital time delayer and first and the second input of door link together, the input of the second digital time delayer has access to charger enabling signal, the output of the second digital time delayer and first and the first input end of door link together, first links together with the output of door and the control end of charger protective circuit switching relay control coil.
An input of temperature alarming digital comparator and the output of interface digital temperature sensor link together, on another input of temperature alarming digital comparator, input has temperature alarming value signal, the output of temperature alarming digital comparator and second and an input of door link together, second links together with another input of door and the output of the second digital time delayer, second and door output on be connected with alarm.
The guard method of a kind of disturbance rejection charging inlet temperature monitoring, comprises the following steps:
The first step, interface digital temperature sensor is embedded in charger charging inlet, charging station digital temperature sensor is set in charging station, digital subtractor input is connected with the output of interface digital temperature sensor, another input of digital subtractor is connected with the output of charging station digital temperature sensor, the input of digital comparator of the output of digital subtractor and temperature rise being transfinited is connected, temperature rise is transfinited digital comparator output with or the second input of door be connected, an input of temperature over-range digital comparator is connected with the output of interface digital temperature sensor, the output of temperature over-range digital comparator with or the first input end of door be connected, or the output of door is connected with the 3rd input of door with first, an input of the super auxiliary limit digital comparator of temperature is connected with the output of interface digital temperature sensor, the output of super for temperature auxiliary limit digital comparator is connected with the input of the first digital time delayer, the output of the first digital time delayer is connected with the second input of door with first, the input access charger enabling signal of the second digital time delayer, the output of the second digital time delayer is connected with the first input end of door with first, first is connected with the control end of charger protective circuit switching relay control coil with the output of door, an input of temperature alarming digital comparator is connected with the output of interface digital temperature sensor, the output of temperature alarming digital comparator is connected with an input of door with second, second is connected with the output of the second digital time delayer with another input of door, second is connected alarm with on the output of door,
Second step, temperature rise transfinite digital comparator another input on input temperature rise and to transfinite duty setting signal, on another input of temperature over-range digital comparator, input temp transfinites duty setting signal, the super auxiliary limit duty setting signal of input temp on another input of the super auxiliary limit digital comparator of temperature, the super auxiliary limit set point of temperature is lower than temperature over-range set point 25 degree, input temp alarm settings value signal on another input of temperature alarming digital comparator;
3rd step, charger start first three second in, the output of the second digital time delayer is digital " 0 " signal, make second with the output of door and first and the output of door be digital " 0 " signal condition, charge protector is cut off by the control end of charger protective circuit switching relay control coil, makes alarm be in conductively-closed state; After charger starts three seconds, first be digital " 1 " signal condition with the first input end of door;
4th step, after charger starts three seconds, when charger interface temperature rises to the super auxiliary limit set point of temperature, time delay is after 1 second, and first is digital one state with the second input of door;
5th step, after charger starts three seconds; charger interface temperature rose to the super auxiliary limit set point of temperature after 1 second; when the temperature of the output of interface digital temperature sensor exceedes temperature over-range set point; or the temperature rise of charging inlet exceed temperature rise transfinite set point time; or the output of door is digital one state; the control end of charger protective circuit switching relay control coil is switched on circuit, and charger protective circuit drops into.
The invention has the beneficial effects as follows: by carrying out Real-Time Monitoring to charging station charging inlet temperature, avoiding charging inlet temperature and raising the potential safety hazard brought; Both considered interface temperature and whether exceeded limit value, and considered again interface temperature rise and whether exceed limit value, and solved the simple temperature that relies on and judge the problem that reliability is low; The time delay method of 1 second when reaching the lower 25 DEG C of values of maximum temperature limit value by adopting temperature, avoid the temperature pulse formula disturbance caused by accidental inducement, the miscarrying of the protective circuit caused enters the generation of phenomenon.Meanwhile, The invention also achieves charger startup to avoid the success of protective circuit miscarrying instantaneously.
Accompanying drawing explanation
Fig. 1 is electrical block diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail:
A kind of disturbance rejection charging inlet temperature monitoring protective device, comprise charger charging inlet 1, charger protective circuit switching relay control coil 15, charging station digital temperature sensor 7, interface digital temperature sensor 2, digital subtractor 8, with door, or door, digital time delayer and digital comparator, interface digital temperature sensor 2 is provided with in charger charging inlet 1, an input of digital subtractor 8 and the output of interface digital temperature sensor 2 link together, another input of digital subtractor 8 and the output of charging station digital temperature sensor 7 link together, a transfinite input of digital comparator 11 of the output of digital subtractor 8 and temperature rise links together, temperature rise transfinite digital comparator 11 another input on input have temperature rise to transfinite duty setting signal, temperature rise transfinite digital comparator 11 output with or the second input of door 12 link together, an input of temperature over-range digital comparator 10 and the output of interface digital temperature sensor 2 link together, on another input of temperature over-range digital comparator 10, input has temperature over-range duty setting signal, the output of temperature over-range digital comparator 10 with or the first input end of door 12 link together, or the output of door 12 and first and the 3rd input of door 14 link together, an input of the super auxiliary limit digital comparator 9 of temperature and the output of interface digital temperature sensor 2 link together, on another input of the super auxiliary limit digital comparator 9 of temperature, input has the super auxiliary limit duty setting signal of temperature, the super auxiliary limit set point of temperature is lower than temperature over-range set point 25 degree, the output of the super auxiliary limit digital comparator 9 of temperature and the input of the first digital time delayer 13 link together, the output of the first digital time delayer 13 and first and the second input of door 14 link together, the input of the second digital time delayer 4 has access to charger enabling signal, the output of the second digital time delayer 4 and first and the first input end of door 14 link together, first links together with the output of door 14 and the control end of charger protective circuit switching relay control coil 15.
An input of temperature alarming digital comparator 3 and the output of interface digital temperature sensor 2 link together, on another input of temperature alarming digital comparator 3, input has temperature alarming value signal, the output of temperature alarming digital comparator 3 and second and an input of door 5 link together, second links together with another input of door 5 and the output of the second digital time delayer 4, second and door 5 output on be connected with alarm 6.
The guard method of a kind of disturbance rejection charging inlet temperature monitoring, comprises the following steps:
The first step, interface digital temperature sensor 2 is embedded in charger charging inlet 1, charging station digital temperature sensor 7 is set in charging station, digital subtractor 8 input is connected with the output of charging station digital temperature sensor 7, another input of digital subtractor 8 is connected with the output of interface digital temperature sensor 2, the input of digital comparator 11 of the output of digital subtractor 8 and temperature rise being transfinited is connected, temperature rise is transfinited digital comparator 11 output with or the second input of door 12 be connected, an input of temperature over-range digital comparator 10 is connected with the output of interface digital temperature sensor 2, the output of temperature over-range digital comparator 10 with or the first input end of door 12 be connected, or the output of door 12 is connected with the 3rd input of door 14 with first, an input of the super auxiliary limit digital comparator 9 of temperature is connected with the output of interface digital temperature sensor 2, the output of super for temperature auxiliary limit digital comparator 9 is connected with the input of the first digital time delayer 13, the output of the first digital time delayer 13 is connected with the second input of door 14 with first, the input of the second digital time delayer 4 accesses charger enabling signal, the output of the second digital time delayer 4 is connected with the first input end of door 14 with first, first is connected with the control end of charger protective circuit switching relay control coil 15 with the output of door 14, an input of temperature alarming digital comparator 3 is connected with the output of interface digital temperature sensor 2, the output of temperature alarming digital comparator 3 is connected with an input of door 5 with second, second is connected with the output of the second digital time delayer 4 with another input of door 5, second is connected alarm 6 with on the output of door 5,
Second step, temperature rise transfinite digital comparator 11 another input on input temperature rise and to transfinite duty setting signal, on another input of temperature over-range digital comparator 10, input temp transfinites duty setting signal, the super auxiliary limit duty setting signal of input temp on another input of the super auxiliary limit digital comparator 9 of temperature, the super auxiliary limit set point of temperature is lower than temperature over-range set point 25 degree, input temp alarm settings value signal on another input of temperature alarming digital comparator 3;
3rd step, charger start first three second in, the output of the second digital time delayer 4 is digital " 0 " signal, make second with the output of door 5 and first and the output of door 14 be digital " 0 " signal condition, charge protector is cut off by the control end of charger protective circuit switching relay control coil 15, makes alarm 6 be in conductively-closed state; After charger starts three seconds, first be digital " 1 " signal condition with the first input end of door 14;
4th step, after charger starts three seconds, when charger interface temperature rises to the super auxiliary limit set point of temperature, time delay is after 1 second, and first is digital one state with the second input of door 14; In charger normal charging process, the time delay method of 1 second when adopting temperature to exceed the super auxiliary limit set point of temperature (the lower 25 DEG C of values of the set point that namely transfinites), instead of adopt temperature to exceed the time delay method of 1 second when transfiniting set point, the problem (in practice, the rate of temperature change of non-interference factor is generally less than 25 DEG C/sec) of the protective circuit malfunction that the accidental disturbance both having solved temperature causes, effectively prevent again time delay 1 second method is brought when adopting temperature to exceed to transfinite set point interface temperature non-interference factor and reaches the delayed problem of protection after limit;
5th step, after charger starts three seconds; charger interface temperature rose to the super auxiliary limit set point of temperature after 1 second; when the temperature of the output of interface digital temperature sensor 2 exceedes temperature over-range set point; or the temperature rise of charging inlet exceed temperature rise transfinite set point time; or the output of door 12 is digital one state; the control end of charger protective circuit switching relay control coil 15 is switched on circuit, and charger protective circuit drops into.
After charger starts three seconds; when the signal value arranging interface temperature transducer in charging station charging inlet exceedes alarm temperature limit value; alarm just can send alarm signal; thus avoid charger and start in first 3 seconds; due to the abrupt transients of charging current, cause the signal value of interface temperature transducer to suddenly change the malfunction of the protective circuit caused.

Claims (3)

1. a disturbance rejection charging inlet temperature monitoring protective device, comprise charger charging inlet (1), charger protective circuit switching relay control coil (15), charging station digital temperature sensor (7), interface digital temperature sensor (2), digital subtractor (8), with door, or door, digital time delayer and digital comparator, it is characterized in that, interface digital temperature sensor (2) is provided with in charger charging inlet (1), an input of digital subtractor (8) and the output of interface digital temperature sensor (2) link together, another input of digital subtractor (8) and the output of charging station digital temperature sensor (7) link together, a transfinite input of digital comparator (11) of the output of digital subtractor (8) and temperature rise links together, temperature rise transfinite digital comparator (11) another input on input have temperature rise to transfinite duty setting signal, temperature rise transfinite digital comparator (11) output with or the second input of door (12) link together, an input of temperature over-range digital comparator (10) and the output of interface digital temperature sensor (2) link together, on another input of temperature over-range digital comparator (10), input has temperature over-range duty setting signal, the output of temperature over-range digital comparator (10) with or the first input end of door (12) link together, or the output of door (12) and first and the 3rd input of door (14) link together, the super input of auxiliary limit digital comparator (9) of temperature and the output of interface digital temperature sensor (2) link together, on another input of the super auxiliary limit digital comparator (9) of temperature, input has the super auxiliary limit duty setting signal of temperature, the super auxiliary limit set point of temperature is lower than temperature over-range set point 25 degree, the super output of auxiliary limit digital comparator (9) of temperature and the input of the first digital time delayer (13) link together, the output of the first digital time delayer (13) and first and the second input of door (14) link together, the input of the second digital time delayer (4) has access to charger enabling signal, the output of the second digital time delayer (4) and first and the first input end of door (14) link together, first links together with the output of door (14) and the control end of charger protective circuit switching relay control coil (15).
2. a kind of disturbance rejection charging inlet temperature monitoring protective device according to claim 1, it is characterized in that, the output of interface digital temperature sensor (2) is connected with temperature alarming digital comparator (3), an input of temperature alarming digital comparator (3) and the output of interface digital temperature sensor (2) link together, on another input of temperature alarming digital comparator (3), input has temperature alarming value signal, the output of temperature alarming digital comparator (3) and second and an input of door (5) link together, second links together with another input of door (5) and the output of the second digital time delayer (4), second with the output of door (5) on be connected with alarm (6).
3. a disturbance rejection charging inlet temperature monitoring guard method, comprises the following steps:
The first step, interface digital temperature sensor (2) is embedded in charger charging inlet (1), charging station digital temperature sensor (7) is set in charging station, an input of digital subtractor (8) is connected with the output of interface digital temperature sensor (2), another input of digital subtractor (8) is connected with the output of charging station digital temperature sensor (7), the input of digital comparator (11) of the output of digital subtractor (8) and temperature rise being transfinited is connected, temperature rise is transfinited digital comparator (11) output with or the second input of door (12) be connected, an input of temperature over-range digital comparator (10) is connected with the output of interface digital temperature sensor (2), the output of temperature over-range digital comparator (10) with or the first input end of door (12) be connected, or the output of door (12) is connected with the 3rd input of door (14) with first, an input of the super auxiliary limit digital comparator (9) of temperature is connected with the output of interface digital temperature sensor (2), the output of super for temperature auxiliary limit digital comparator (9) is connected with the input of the first digital time delayer (13), the output of the first digital time delayer (13) is connected with the second input of door (14) with first, the input of the second digital time delayer (4) accesses charger enabling signal, the output of the second digital time delayer (4) is connected with the first input end of door (14) with first, first is connected with the control end of charger protective circuit switching relay control coil (15) with the output of door (14), an input of temperature alarming digital comparator (3) is connected with the output of interface digital temperature sensor (2), on another input of temperature alarming digital comparator (3), input has temperature alarming duty setting signal, the output of temperature alarming digital comparator (3) is connected with an input of door (5) with second, second is connected with the output of the second digital time delayer (4) with another input of door (5), second is connected alarm (6) with on the output of door (5),
Second step, temperature rise transfinite digital comparator (11) another input on input temperature rise and to transfinite duty setting signal, on another input of temperature over-range digital comparator (10), input temp transfinites duty setting signal, the super auxiliary limit duty setting signal of input temp on another input of the super auxiliary limit digital comparator (9) of temperature, the super auxiliary limit set point of temperature is lower than temperature over-range set point 25 degree, input temp alarm settings value signal on another input of temperature alarming digital comparator (3);
3rd step, charger start first three second in, the output of the second digital time delayer (4) is digital " 0 " signal, make second with the output of door (5) and first and the output of door (14) be digital " 0 " signal condition, charge protector is cut off by the control end of charger protective circuit switching relay control coil (15), makes alarm (6) be in conductively-closed state; After charger starts three seconds, first be digital " 1 " signal condition with the first input end of door (14);
4th step, after charger starts three seconds, when charger interface temperature rises to the super auxiliary limit set point of temperature, time delay is after 1 second, and first is digital one state with the second input of door (14);
5th step, after charger starts three seconds; charger interface temperature rose to the super auxiliary limit set point of temperature after 1 second; when the temperature of the output of interface digital temperature sensor (2) exceedes temperature over-range set point; or the temperature rise of charging inlet exceed temperature rise transfinite set point time; or the output of door (12) is digital one state; the control end of charger protective circuit switching relay control coil (15) is switched on circuit, and charger protective circuit drops into.
CN201510199836.3A 2015-04-25 2015-04-25 Anti-disturbance charging interface temperature monitoring and protecting device and protecting method thereof Pending CN104779581A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101740835A (en) * 2009-12-15 2010-06-16 中兴通讯股份有限公司 Battery charging control method and device as well as terminal device
CN203445596U (en) * 2013-08-07 2014-02-19 深圳市力能加电站有限公司 Charging interface protection circuit and charger
CN103595105A (en) * 2013-11-29 2014-02-19 上海埃士工业科技有限公司 Device and method for controlling charging on vehicle
CN103885424A (en) * 2014-03-28 2014-06-25 大唐贵州发耳发电有限公司 DCS system temperature line breakage protection logic
US20140253047A1 (en) * 2013-03-08 2014-09-11 Kabushiki Kaisha Toshiba Electronic device and system
CN204615361U (en) * 2015-04-25 2015-09-02 张乃凡 Disturbance rejection charging inlet temperature monitoring protective device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101740835A (en) * 2009-12-15 2010-06-16 中兴通讯股份有限公司 Battery charging control method and device as well as terminal device
US20140253047A1 (en) * 2013-03-08 2014-09-11 Kabushiki Kaisha Toshiba Electronic device and system
CN203445596U (en) * 2013-08-07 2014-02-19 深圳市力能加电站有限公司 Charging interface protection circuit and charger
CN103595105A (en) * 2013-11-29 2014-02-19 上海埃士工业科技有限公司 Device and method for controlling charging on vehicle
CN103885424A (en) * 2014-03-28 2014-06-25 大唐贵州发耳发电有限公司 DCS system temperature line breakage protection logic
CN204615361U (en) * 2015-04-25 2015-09-02 张乃凡 Disturbance rejection charging inlet temperature monitoring protective device

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