CN103424277B - A kind of diagnostic method of cooling system - Google Patents
A kind of diagnostic method of cooling system Download PDFInfo
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- CN103424277B CN103424277B CN201310371431.4A CN201310371431A CN103424277B CN 103424277 B CN103424277 B CN 103424277B CN 201310371431 A CN201310371431 A CN 201310371431A CN 103424277 B CN103424277 B CN 103424277B
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- temperature
- cooling system
- heater members
- temperature sensor
- vehicle speed
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Abstract
This application discloses the diagnostic method of a kind of cooling system, described cooling system is for carrying out cooling to heater members, and the temperature of described heater members is detected in real time by temperature sensor.Described method comprises the steps: the 1st step, some state of the physical quantity caloric value causing heater members changed is referred to as a kind of operating mode, at least record from a kind of working conditions change to the time of another kind of operating mode and temperature sensor detect at this moment temperature variations in section.2nd step, when heater members is in a kind of operating mode recorded to another kind of operating mode, compares the actual temperature change situation that the temperature sensor in the identical time detects and the temperature variations recorded.When both are consistent, then judge that the cooling system of heater members is working properly.When both do not correspond, then judge that the cooling system of heater members breaks down, send alarm signal or carry out troubleshooting.The application is with low cost, can contain the cooling system fault of any kind.
Description
Technical field
The application relates to a kind of method that cooling system detecting heater members is the most working properly.
Background technology
For guaranteeing the normal work and use life-span of heater members, usually heater members is provided with a set of cooling system.Send out
Thermal device transfers heat to cooling system by the good contact between cooling system, cooling system use again air-cooled or
Water-cooling pattern takes away heat.The caloric value of some heater members changes at any time, although have temperature sensor directly to examine
Survey the temperature of heater members, but cannot learn that its cooling system is the most working properly according to this temperature value.
Such as, the driving motor of new-energy automobile (pure electric automobile, hybrid vehicle etc.), electric machine controller, DC/DC
(DC-to-dc) change-over circuit all contains device for power switching (such as IGBT device, MOS transistor etc.).These
The caloric value of device for power switching is relatively big, and usually it is provided with water-cooling heat radiating system.In addition, also temperature sensing
Device detects the temperature of device for power switching.Along with by the difference of electric current, the caloric value of these device for power switching also can
Changing therewith, the temperature that therefore temperature sensor is detected also will change therewith.If being in boost phase at vehicle, that
Device for power switching may be relatively big in the amount of section internal heat generation sometime, thus temperature is higher, this be considered as one just
Chang Xianxiang.As long as water-cooling heat radiating system now normally works, the heat of device for power switching will be taken away in time.So
And, how to learn that the duty of water-cooling heat radiating system just becomes a difficult problem.
The Chinese utility model patent that Authorization Notice No. is CN201796045U, authorized announcement date is on April 13rd, 2011
Disclose the trouble-shooter of a kind of water-cooling heat radiating system.It is characterized by the runner of coolant newly-increased flow rate of water flow prison
Surveying parts, once flow rate of water flow is considered as water-cooling heat radiating system and breaks down less than arranging value, thus sends alarm signal.
This device needs to increase extra element in water-cooling heat radiating system, and not only structure is more complicated, too increases extra cost.
Summary of the invention
Technical problems to be solved in this application are to provide the diagnostic method of a kind of cooling system, are not increasing any element
Can detect under premise that the work of cooling system is the most normal.
For solving above-mentioned technical problem, the diagnostic method of the application cooling system is, described cooling system is for heating element
Part carries out cooling, and the temperature of described heater members is detected in real time by temperature sensor:
1st step, some state of the physical quantity caloric value causing heater members changed is referred to as a kind of operating mode,
At least record from a kind of working conditions change to the time of another kind of operating mode and temperature sensor detect at this moment section
Interior temperature variations；
2nd step, when heater members is in a kind of operating mode recorded to another kind of operating mode, the relatively temperature in the identical time
The actual temperature change situation that degree sensor detects and the temperature variations recorded；
When both are consistent, then judge that the cooling system of heater members is working properly；
When both do not correspond, then judge that the cooling system of heater members breaks down, send alarm signal or carry out at fault
Reason.
The application is by the comparison to heater members temperature variations under identical operating mode, the heat radiation system to heater members
System the most normally work diagnoses.The method need not newly-increased any element, directly utilizes detection heater members temperature
Temperature sensor, thus simple in construction, with low cost, and the cooling system fault of any kind can be contained.
Accompanying drawing explanation
Fig. 1 is the application flow chart to the diagnostic method of cooling system；
Fig. 2 is the circuit theory diagrams of the inverter of new-energy automobile.
Detailed description of the invention
The application scenarios of the application is: the heat of heater members is carried out cooling by cooling system, the temperature of heater members
Detected in real time by temperature sensor.Referring to Fig. 1, the diagnostic method of the application cooling system is:
1st step, some state of the physical quantity caloric value causing heater members changed is referred to as a kind of operating mode,
At least record from a kind of working conditions change to the time of another kind of operating mode and temperature sensor detect at this moment section
Interior temperature variations；
2nd step, when heater members is in a kind of operating mode recorded to another kind of operating mode, the relatively temperature in the identical time
The actual temperature change situation that degree sensor detects and the temperature variations recorded；
When both are consistent, then judge that the cooling system of heater members is working properly；
When both do not correspond, then judge that the cooling system of heater members breaks down, send alarm signal or carry out at fault
Reason.
Preferably, in described method the 1st step, record multiple from a kind of working conditions change to the transformation period of another kind of operating mode,
And temperature sensor detect at this moment between temperature variations in section.
If the power in motor, electric machine controller, DC/DC change-over circuit that drives that heater members is new-energy automobile is opened
Close device, then the physical quantity causing its caloric value to change is exactly electric current.This physical quantity also can be equivalent to new forms of energy vapour
The speed of car or moment of torsion.One will be known as by a kind of state of the electric current (or speed of new-energy automobile) of heater members
Plant operating mode.At least record and change to the second current value (or in the first speed by the electric current of heater members at the first current value
Value changes to the second vehicle speed value) time and temperature sensor detect at this moment between variations in temperature feelings in section
Condition.Preferably at multiple a kind of current values to another kind of current value, (or multiple one vehicle speed value arrives another to record heater members
Kind of vehicle speed value) between transformation period and temperature sensor detect at this moment between temperature variations in section.
Preferably, in described method the 2nd step, identical time, temperature variations be consistent refer both to roughly the same, i.e. relatively
There is in by a small margin deviation be also considered as identical or be consistent, such as the deviation within 10%.Only send out in by a relatively large margin
Raw deviation is considered as just to differ, do not correspond, and is greater than the deviation of 10%.
Referring to Fig. 2, the inverter of new-energy automobile generally uses typical three phase full bridge voltage source type inverter, its by
Three brachium pontis compose in parallel, and each brachium pontis is made up of two power switching device series again, a total of six power switch devices
Part Q1～Q6.Inverter output three-phase alternating current u, v, w.DC bus capacitor therein (DC link capacitor)
As the load balance energy-storage travelling wave tube between DC side (accumulator battery) and AC (alternating current generator).Generally by each
Two device for power switching and a temperature sensor on brachium pontis are encapsulated as a module, the most a total of three Encapsulation Moulds
Block.These three module all carries out cooling by same water-cooling heat radiating system.
Herein described method is applied to the three phase full bridge circuit shown in Fig. 2, then comprise the steps:
1st ' step, carries out electric circuit inspection to the temperature sensor in three package modules, it is ensured that circuit is normal.
2nd ' step, compares the detected value of temperature sensor in three package modules, if deviation is one in the same time
Then thinking the working properly of temperature sensor in tentering degree, such as deviation is within 10%.If deviation exceedes certain amplitude
Then thinking that temperature sensor is broken down, such as deviation is more than 10%.
3rd ' step, gathers the transformation period between the first vehicle speed value to the second vehicle speed value and three temperature sensors exist
Temperature variations in this time section.Then gather the transformation period between the 3rd vehicle speed value to the 4th vehicle speed value, with
And the temperature variations in section between three temperature sensors at this moment.By that analogy, gather at multiple a kind of vehicle speed values
The temperature detected in section between transformation period between another kind of vehicle speed value and three temperature sensors at this moment becomes
Change situation is also recorded.
4th ' step, when occurring the 3rd ' a kind of vehicle speed value of being recorded of step to another kind vehicle speed value time, compare three temperature
Sensor actual temperature change situation in roughly the same time section and the temperature variations recorded.When both are big
Cause is consistent, and such as deviation is within 10%, then judge that water-cooling heat radiating system is working properly.When both do not correspond, the most partially
Difference more than 10%, then judges that water-cooling heat radiating system breaks down, and sends alarm signal or carries out troubleshooting and (such as limit
Moment of torsion output, restriction power output etc.).
In described method the 3rd ' step and the 4th ' step, described vehicle speed value also can be replaced by current value or torque value.
The order of described method is the most variable more: the 3rd ' step, the 1st ' step, the 2nd ' step, the 4th ' step.
These are only the preferred embodiment of the application, be not used to limit the application.For a person skilled in the art,
The application can have various modifications and variations.All within spirit herein and principle, any amendment of being made, equivalent
Replacement, improvement etc., within should be included in the protection domain of the application.
Claims (6)
1. a diagnostic method for cooling system, described cooling system is for carrying out cooling to heater members, described
The temperature of heater members is detected in real time by temperature sensor；It is characterized in that, described method comprises the steps:
1st step, some state of the physical quantity caloric value causing heater members changed is referred to as a kind of operating mode,
At least record from a kind of working conditions change to the time of another kind of operating mode and temperature sensor detect at this moment section
Interior temperature variations；
2nd step, when heater members is in a kind of operating mode recorded to another kind of operating mode, the relatively temperature in the identical time
The actual temperature change situation that degree sensor detects and the temperature variations recorded；
When both are consistent, then judge that the cooling system of heater members is working properly；
When both do not correspond, then judge that the cooling system of heater members breaks down, send alarm signal or carry out at fault
Reason；
Described heater members is the device for power switching in the inverter of new-energy automobile, and described inverter is three phase full bridge electricity
Road, is composed in parallel by brachium pontis, and each brachium pontis is made up of two power switching device series again；Two merits on each brachium pontis
Rate switching device and a temperature sensor are encapsulated as a module, and three package modules are all by same water-cooling system
System carries out cooling；Described method comprises the steps:
1st ' step, carries out electric circuit inspection to the temperature sensor in three package modules, it is ensured that circuit is normal；
2nd ' step, compares the detected value of temperature sensor in three package modules, if deviation is one in the same time
The working properly of temperature sensor is then thought in tentering degree；If deviation exceedes certain amplitude, think that temperature sensor occurs
Fault；
3rd ' step, gathers the transformation period between the first vehicle speed value to the second vehicle speed value and three temperature sensors exist
Temperature variations in this time section；Then gather the transformation period between the 3rd vehicle speed value to the 4th vehicle speed value, with
And the temperature variations in section between three temperature sensors at this moment；By that analogy, gather at multiple a kind of vehicle speed values
The temperature detected in section between transformation period between another kind of vehicle speed value and three temperature sensors at this moment becomes
Change situation is also recorded；
4th ' step, when occurring the 3rd ' a kind of vehicle speed value of being recorded of step to another kind vehicle speed value time, compare three temperature
Sensor actual temperature change situation within the identical time and the temperature variations recorded；
When both are substantially consistent, then judge that water-cooling heat radiating system is working properly；
When both do not correspond, then judge that water-cooling heat radiating system breaks down, send alarm signal or limit moment of torsion output, limit
Power processed exports.
The diagnostic method of cooling system the most according to claim 1, is characterized in that, in described method the 1st step,
Record multiple from a kind of working conditions change to the transformation period of another kind of operating mode and temperature sensor detect at this moment
Temperature variations in section.
The diagnostic method of cooling system the most according to claim 1, is characterized in that, in described method the 2nd step,
Have the time devious in certain amplitude, temperature variations is also considered as identical or is consistent；Beyond this certain amplitude
The time of deviation, temperature variations be considered as just to differ or do not correspond.
The diagnostic method of cooling system the most according to claim 1, is characterized in that, causes described heater members
The physical quantity that caloric value changes is electric current, moment of torsion or speed.
The diagnostic method of cooling system the most according to claim 4, is characterized in that, described method the 3rd ' step and
In 4 ' steps, described vehicle speed value is replaced by current value or torque value.
The diagnostic method of cooling system the most according to claim 4, is characterized in that, the order change of described method
For: the 3rd ' step, the 1st ' step, the 2nd ' step, the 4th ' step.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104713605B (en) * | 2013-12-16 | 2018-04-13 | 联合汽车电子有限公司 | Electric automobile cooling system coolant rate deficiency method for diagnosing faults |
| CN103925942B (en) * | 2014-03-18 | 2016-06-22 | 烽火通信科技股份有限公司 | The Air Filter detecting device of electronic equipment and method |
| CN105181375B (en) * | 2015-10-28 | 2017-11-21 | 东莞理工学院 | 3D printer fault detection method |
| CN105522987B (en) * | 2015-12-17 | 2018-02-16 | 长城信息产业股份有限公司 | A kind of intelligent vehicle-carried power distribution protective device and its method |
| CN106097672A (en) * | 2016-08-15 | 2016-11-09 | 浙江海得新能源有限公司 | The alarm method that forced air cooling IGBT module radiator blocks |
| CN107462391B (en) * | 2017-06-30 | 2019-12-31 | 上海蔚来汽车有限公司 | Calibration method and calibration system for performance parameters of radiator of new energy automobile |
| CN107421762B (en) * | 2017-07-31 | 2020-01-03 | 特灵空调系统(中国)有限公司 | Heat dissipation system diagnosis method and device |
| CN107796849A (en) * | 2017-11-23 | 2018-03-13 | 宁波迪奥机械有限公司 | A kind of radiator test system and method for testing |
| CN108827648A (en) * | 2018-04-18 | 2018-11-16 | 浙江吉利汽车研究院有限公司 | aging monitoring method and device |
| CN109506955B (en) * | 2018-12-25 | 2021-10-15 | 重庆工商大学 | Method, device and system for acquiring torque limiting factor |
| CN111413116B (en) * | 2019-01-08 | 2021-02-09 | 广州汽车集团股份有限公司 | Motor controller cooling fault detection system and method thereof |
| CN111272443B (en) * | 2020-02-26 | 2022-04-05 | 潍柴动力股份有限公司 | Method and device for diagnosing heat dissipation system, vehicle, electronic device and storage medium |
| CN115389053B (en) * | 2022-08-19 | 2024-06-14 | 中国第一汽车股份有限公司 | Reliability diagnosis method and device for temperature sensor of motor cooling system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101770266B (en) * | 2008-12-31 | 2013-03-20 | 北京联想软件有限公司 | Heat sink assembly of computer and control method thereof |
| CN101793928A (en) * | 2010-01-27 | 2010-08-04 | 广州电器科学研究院 | Phase-shifting full-bridge convertor real-time fault diagnosis method and system |
| CN102192845B (en) * | 2010-03-18 | 2014-04-16 | 施耐德东芝换流器欧洲公司 | Diagnosis method for heat radiation system |
| CN201796045U (en) * | 2010-10-08 | 2011-04-13 | 上海中科深江电动车辆有限公司 | Water circulation operating fault diagnosis device of electric automobile cooling system |
| CN102426108B (en) * | 2011-08-25 | 2013-11-27 | 浙江大学 | Full-closed loop automatic detection system of automobile radiator |
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