KR101154678B1 - Overheating preventing method for high-voltage cable in vehicle - Google Patents
Overheating preventing method for high-voltage cable in vehicle Download PDFInfo
- Publication number
- KR101154678B1 KR101154678B1 KR1020100120660A KR20100120660A KR101154678B1 KR 101154678 B1 KR101154678 B1 KR 101154678B1 KR 1020100120660 A KR1020100120660 A KR 1020100120660A KR 20100120660 A KR20100120660 A KR 20100120660A KR 101154678 B1 KR101154678 B1 KR 101154678B1
- Authority
- KR
- South Korea
- Prior art keywords
- high voltage
- voltage cable
- temperature
- limit value
- vehicle
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/0207—Wire harnesses
- B60R16/0215—Protecting, fastening and routing means therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
Abstract
The present invention enables to limit the movement of the current through the high voltage cable to an appropriate level without measuring the temperature of the high voltage cable itself, without the need for additional development costs, without increasing the specifications of the high voltage cable conventional high voltage cable It provides a high voltage cable overheating prevention method of a vehicle to prevent overheating of the high voltage cable.
Description
The present invention relates to a technique for preventing overheating of a high voltage cable used for energizing high voltage electricity in a vehicle such as a fuel cell vehicle.
In the case of a fuel cell vehicle or other vehicle that is driven by electricity, there is a portion of the vehicle that needs to be energized.
Recently, the continuous high-power operation time is gradually increasing due to the improvement of the performance and efficiency of fuel cell system and driving parts of fuel cell vehicles. In the case of high voltage cable which is responsible for power movement between each component, the conventional specification The situation is maintained.
Therefore, although it is desirable to change the specification of the high voltage cable in the vehicle in accordance with the performance improvement of the vehicle which can be driven by using a fuel cell vehicle and other electricity in recent years, such a high voltage cable due to the correlation with various peripheral components In some cases, it is impossible to change the specification, and the specification change such as the increase in the cross-sectional area of the high-voltage cable not only incurs the cost of developing the change, but also increases the weight of the vehicle and worsens the fuel economy of the vehicle.
As a countermeasure for the above problem, there may be a method for limiting the power transfer through the high voltage cable according to the temperature of the high voltage cable, which is a separate temperature sensor for measuring the temperature of the high voltage cable itself and such a temperature. There is a problem that requires the development of a separate structure for measurement.
The present invention has been made to solve the problems described above, by allowing the current movement through the high voltage cable to be limited to an appropriate level without measuring the temperature of the high voltage cable itself, there is no additional development cost, It is an object of the present invention to provide a method for preventing overheating of a high voltage cable of a vehicle that can prevent overheating of a high voltage cable while using a conventional high voltage cable without increasing the specification of the high voltage cable.
The high voltage cable overheating prevention method of the vehicle according to the present invention for achieving the above object is
In the temperature estimation model for estimating the temperature of the high voltage cable according to the current flowing through the control high voltage cable and the temperature measured by the temperature sensor measuring the temperature around the high voltage cable, the current and the surroundings of the high voltage cable to be controlled A temperature estimating step of obtaining an estimated temperature by inputting a temperature of?
A first limit value setting step of setting a current limit value to limit a current flowing through the high voltage cable according to the estimated temperature estimated in the temperature estimation step;
Characterized in that configured to include.
The present invention enables to limit the movement of the current through the high voltage cable to an appropriate level without measuring the temperature of the high voltage cable itself, without the need for additional development costs, without increasing the specifications of the high voltage cable conventional high voltage cable While using to prevent overheating of the high voltage cable.
1 is a view for explaining a high voltage cable overheating prevention method of a vehicle according to the present invention;
2 is an experimental graph showing the maximum temperature inside the high voltage cable over time while supplying current to the high voltage cable,
3 is a graph shown by the temperature estimation model according to the present invention under the same conditions as in FIG. 2.
Referring to FIG. 1, an embodiment of the present invention provides a temperature estimation model for estimating a temperature of a high voltage cable according to a current flowing through a high voltage cable to be controlled and a temperature measured by a temperature sensor measuring a temperature around the high voltage cable. A temperature estimation step (S101) of obtaining an estimated temperature by inputting a current of the current and the surrounding temperature of the high voltage cable to be controlled; And a primary limit value setting step (S102) of setting a current limit value to limit the current flowing through the high voltage cable according to the estimated temperature estimated in the temperature estimation step (S101).
In addition, the present embodiment further comprises a secondary limit value setting step (S103) for comparing the current limit value set in the primary limit value setting step (S102) with a conventional current limit value and determining the minimum value as the final current limit value. .
Of course, it is possible to control by the motor controller only by the current limit value obtained in the primary limit value setting step (S102), but in the present embodiment, the current limit value and the primary limit value setting step obtained by the conventional algorithm as described above. The second limit value setting step (S103) is obtained by obtaining the minimum value of the current limit values obtained in S102 and used in a motor controller, thereby pursuing more safety.
The temperature estimating model has a function in which the current flowing through the high voltage cable to be controlled and the temperature measured by the temperature sensor for measuring the ambient air temperature around the high voltage cable are independent variables, and the estimated temperature is a dependent variable. Or in the form of a map. Of course, the map may be configured by further considering other elements as independent variables, and may be constructed by various experiments and interpretations, and stored in advance for use by an electronic controller.
For reference, the accuracy of the temperature estimation model can be found to the estimated temperature at a level very similar to the actual case, as compared to FIG. 2 and FIG.
That is, the temperature of the high voltage cable measured at the
Therefore, calculating the current limit value allowed for the high voltage cable using the temperature estimation model as described above can ensure sufficient reliability.
On the other hand, in the first limit value setting step (S102), as shown in FIG. 1, the current limit value is obtained by a map in which the current limit value increases as the estimated temperature increases.
Here, the current limit value means the upper limit value. For example, as the estimated temperature is changed from T1 to T2 in FIG. 1, the current limit value decreases from Lim1 to Lim2, substantially through the high voltage cable under the control of the motor controller. The current is limited to a range within the current limit value.
Therefore, as described above, the current flowing through the high voltage cable and the temperature around the high voltage cable are simply measured without preparing a special temperature measuring structure and a temperature sensor accordingly, and the high voltage is measured through the temperature estimation model. By calculating the estimated temperature inside the cable, and by using this to limit the maximum current flowing in the high voltage cable in the motor controller within the range of the current limit value, it is possible to prevent the high voltage cable from overheating without increasing the specification of the high voltage cable itself. .
S101; Temperature estimation step
S102; Primary limit value setting step
S103; Second limit value setting step
Claims (5)
A first limit value setting step of setting a current limit value to limit a current flowing through the high voltage cable according to the estimated temperature estimated in the temperature estimation step;
High voltage cable overheating prevention method of a vehicle comprising a.
A secondary limit value setting step of comparing the current limit value set in the primary limit value setting step with a conventional current limit value and determining the minimum value as the final current limit value;
High voltage cable overheating prevention method of a vehicle, characterized in that further comprises a.
The temperature estimating model is formed as a function of the current flowing through the high voltage cable to be controlled and the temperature measured by the temperature sensor measuring the temperature around the high voltage cable as an independent variable, and the estimated temperature as a dependent variable.
High voltage cable overheating prevention method of a vehicle, characterized in that.
The temperature estimation model is formed in the form of a map in which the current flowing through the high voltage cable to be controlled and the temperature measured by a temperature sensor measuring the temperature around the high voltage cable are independent variables, and the estimated temperature is a dependent variable. that
High voltage cable overheating prevention method of a vehicle, characterized in that.
In the first limit setting step, the current limit value is obtained by a map in which the current limit value increases as the estimated temperature increases.
High voltage cable overheating prevention method of a vehicle, characterized in that.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020100120660A KR101154678B1 (en) | 2010-11-30 | 2010-11-30 | Overheating preventing method for high-voltage cable in vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020100120660A KR101154678B1 (en) | 2010-11-30 | 2010-11-30 | Overheating preventing method for high-voltage cable in vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR101154678B1 true KR101154678B1 (en) | 2012-06-08 |
Family
ID=46688837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020100120660A KR101154678B1 (en) | 2010-11-30 | 2010-11-30 | Overheating preventing method for high-voltage cable in vehicle |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR101154678B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11785736B2 (en) | 2019-05-31 | 2023-10-10 | Eaton Intelligent Power Limited | Electrical conveyance assembly |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11289653A (en) | 1998-03-31 | 1999-10-19 | Yazaki Corp | Current detection sensor for cable, and current detection system using the same |
| JP2001165781A (en) | 1999-12-13 | 2001-06-22 | Hitachi Cable Ltd | Method for estimating conductor temperature of power cable |
-
2010
- 2010-11-30 KR KR1020100120660A patent/KR101154678B1/en active IP Right Grant
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11289653A (en) | 1998-03-31 | 1999-10-19 | Yazaki Corp | Current detection sensor for cable, and current detection system using the same |
| JP2001165781A (en) | 1999-12-13 | 2001-06-22 | Hitachi Cable Ltd | Method for estimating conductor temperature of power cable |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11785736B2 (en) | 2019-05-31 | 2023-10-10 | Eaton Intelligent Power Limited | Electrical conveyance assembly |
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