CN111856331A - Method and device for detecting open circuit fault of charging circuit of vehicle and vehicle - Google Patents
Method and device for detecting open circuit fault of charging circuit of vehicle and vehicle Download PDFInfo
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Abstract
The invention relates to the technical field of circuit detection, and provides a method and a device for detecting the open circuit fault of a charging circuit of a vehicle, wherein the method for detecting the open circuit fault of the charging circuit of the vehicle comprises the following steps: acquiring the electromotive force of the output end of a generator of the vehicle and the electromotive force of the anode of a storage battery of the vehicle; and judging whether the charging line has an open circuit fault according to the relationship between the electromotive force difference value of the output end of the generator and the anode of the storage battery and a preset upper limit threshold and a preset lower limit threshold, wherein the upper limit threshold is larger than the lower limit threshold. The method for detecting the open circuit fault of the charging circuit of the vehicle can find the open circuit fault of the charging circuit in time, so that a user can maintain the fault of the charging circuit of the vehicle in time, a series of troubles of power shortage of the storage battery, incapability of ignition of the vehicle and the like are avoided, the service life of the storage battery is prolonged, and the maintenance difficulty of low voltage fault of the storage battery is reduced.
Description
Technical Field
The invention relates to the technical field of circuit detection, in particular to a method and a device for detecting an open circuit fault of a charging circuit of a vehicle and the vehicle.
Background
The storage battery plays an important role on the vehicle and is used for supplying power to electric appliances of the whole vehicle when the vehicle engine is not started or high voltage is not applied to the vehicle. In practical application, after a vehicle engine is started or high voltage is applied to a vehicle, a generator is used for charging a storage battery so as to supplement the electric quantity of the storage battery, so that the storage battery is prevented from being lack of power, and a series of problems that the storage battery cannot provide electric energy for ignition of the vehicle and the like caused by the electric quantity lack of the storage battery are avoided.
In the prior art, when a storage battery is charged after a vehicle engine is started or a vehicle is in a high voltage state, if a charging circuit is broken or charging safety is ablated, a driver cannot immediately sense the fault and can continue to use the vehicle. Only when the voltage of the storage battery is reduced to a certain value, the driver is reminded of the low-voltage fault of the current storage battery through the vehicle instrument, namely, the timeliness of event perception of the fault of the storage battery of the driver is poor.
Disclosure of Invention
In view of this, the present invention is directed to provide a method for detecting a disconnection fault of a charging line of a vehicle, and a user can timely maintain the charging line fault of the vehicle by finding that the charging line has the disconnection fault.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a method of detecting an open circuit fault of a charging line of a vehicle, the method comprising: acquiring the electromotive force of the output end of a generator of the vehicle and the electromotive force of the positive pole of a storage battery of the vehicle; and judging whether the charging line has an open circuit fault according to the relationship between the electromotive force difference value between the electromotive force of the output end of the generator and the electromotive force of the anode of the storage battery and the magnitude of an upper limit threshold and a lower limit threshold which are preset respectively, wherein the upper limit threshold is larger than the lower limit threshold.
Further, the determining whether the charging line has an open circuit fault includes: judging the size relationship between the electromotive force difference and a preset upper limit threshold and a preset lower limit threshold respectively, and outputting a preset voltage state according to the judgment result of the size relationship; and judging whether the charging circuit has an open circuit fault according to the change condition of the output voltage state.
Further, the outputting a preset voltage state according to the determination result of the magnitude relationship includes: when the electromotive force difference is larger than the upper limit threshold value, outputting a high level; when the electromotive force difference is smaller than the lower limit threshold, outputting a low level; and outputting the current voltage state when the electromotive force difference value is between the upper limit threshold and the lower limit threshold.
Further, the determining whether the charging line has an open-circuit fault according to the variation of the output voltage state includes: when the output voltage state is changed from a low level to a high level, judging that the charging circuit has an open circuit fault, and performing fault reminding; and/or when the output voltage state changes from high level to low level, determining that the open circuit fault of the charging circuit disappears, and eliminating the fault prompt.
Compared with the prior art, the method for detecting the open circuit fault of the charging circuit of the vehicle has the following advantages:
the method for detecting the open circuit fault of the charging circuit of the vehicle can find the open circuit fault of the charging circuit in time, so that a user can maintain the fault of the charging circuit of the vehicle in time, a series of troubles of power shortage of a storage battery, incapability of ignition of the vehicle and the like caused by the fault can be avoided, the service life of the storage battery of the vehicle is prolonged, and the maintenance difficulty of low voltage fault of the storage battery of the vehicle is reduced.
Another objective of the present invention is to provide a device for detecting a disconnection fault of a charging line of a vehicle, so that a user can timely find that the disconnection fault of the charging line occurs, and timely maintain the charging line fault of the vehicle.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
an open circuit fault detection device of a charging line of a vehicle, comprising: the detection unit is used for acquiring the electromotive force of the output end of a generator of the vehicle and the electromotive force of the anode of a storage battery of the vehicle, and judging the relationship between the electromotive force difference value between the electromotive force of the output end of the generator and the electromotive force of the anode of the storage battery and a preset upper limit threshold and a preset lower limit threshold respectively, wherein the upper limit threshold is larger than the lower limit threshold; and the control unit is used for judging whether the charging line has an open circuit fault according to the judgment result of the magnitude relation.
Further, the detection unit includes an open circuit fault detection module configured with an input terminal and an output terminal: the open circuit fault detection module is used for judging the size relationship between the electromotive force difference value and the upper limit threshold value and the lower limit threshold value respectively, the input end of the open circuit fault detection module is used for collecting the electromotive force of the output end of the generator and the electromotive force of the anode of the storage battery, and the output end of the open circuit fault detection module is used for outputting a preset voltage state according to the judgment result of the size relationship of the detection module; and the control unit is used for judging whether the charging line has an open circuit fault according to the judgment result of the magnitude relation, and comprises: and judging whether the charging circuit has an open circuit fault according to the change condition of the output voltage state.
Further, the open-circuit fault detection module includes a hysteresis comparator, which is used to preset the upper threshold and the lower threshold, and to determine the magnitude relationship between the electromotive force difference and the upper threshold and the lower threshold.
Further, the outputting, according to the determination result of the magnitude relationship, a preset voltage state by the output terminal includes: when the electromotive force difference value is larger than the upper limit threshold value, the output end outputs a high level; when the electromotive force difference is smaller than the lower limit threshold, the output end outputs a low level; and when the electromotive force difference value is between the upper limit threshold value and the lower limit threshold value, the output end outputs the current voltage state.
Further, the step of judging whether the charging line has an open-circuit fault according to the change condition of the output voltage state by the control unit includes: when the voltage state output by the output end is changed from low level to high level, judging that the charging circuit has open circuit fault, and performing fault reminding; and/or when the voltage state output by the output end is changed from high level to low level, judging that the open circuit fault of the charging circuit disappears, and eliminating the fault prompt.
Compared with the prior art, the open circuit fault detection device of the charging circuit of the vehicle and the open circuit fault detection method of the charging circuit of the vehicle have the same advantages, and are not repeated herein.
Another objective of the present invention is to provide a vehicle, so that a user can timely find that a charging line has an open circuit fault, and timely maintain the charging line fault of the vehicle.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a vehicle is provided with a disconnection fault detection device for a charging line of the vehicle.
Compared with the prior art, the vehicle and the method for detecting the open circuit fault of the charging circuit of the vehicle have the same advantages, and are not repeated herein.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a flowchart of a method for detecting a disconnection fault of a charging line of a vehicle according to an embodiment of the present invention;
Fig. 2 is a schematic diagram of a connection method between a charging line of a vehicle and a disconnection fault detection device of the charging line of the vehicle according to an embodiment of the present invention;
fig. 3 is a block diagram of a disconnection fault detection apparatus for a charging line of a vehicle according to an embodiment of the present invention;
fig. 4 is a schematic diagram of an open circuit fault detection module in a specific application example of the open circuit fault detection device for a charging line of a vehicle according to the embodiment of the present invention.
Description of reference numerals:
10. detection unit 20 and control unit
30. Generator 40 and storage battery
11. Operational amplifier 12, hysteresis comparator
13. A first input terminal 14, a second input terminal
15. Output end
Detailed Description
In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Fig. 1 is a flowchart of a method for detecting a disconnection fault of a charging line of a vehicle according to an embodiment of the present invention, where the charging line of the vehicle includes a generator (not shown in fig. 1, but shown as a generator 30 in fig. 2) and a battery (not shown in fig. 1, but shown as a battery 40 in fig. 2) of the vehicle, and detecting a disconnection fault of the charging line of the vehicle is to substantially detect whether a line between the generator and the battery of the vehicle is disconnected. As shown in fig. 1, the open circuit fault detection method of a charging line of a vehicle may include:
And S101, acquiring the electromotive force of the output end of the generator of the vehicle and the electromotive force of the anode of the storage battery of the vehicle.
Without considering the internal resistance of the connection wire between the generator 30 and the battery 40, if the charging line of the vehicle is normal, the electromotive force of the generator output terminal and the electromotive force of the battery positive electrode should be equal, and therefore, the electromotive force of the generator output terminal and the electromotive force of the battery positive electrode are obtained here to be used for determining whether the charging line is broken in step S102.
And S102, judging whether the charging line has an open circuit fault.
Specifically, whether the charging line has an open circuit fault is judged according to the magnitude relation between the electromotive force difference between the electromotive force of the output end of the generator and the electromotive force of the positive electrode of the storage battery and preset upper and lower threshold values, wherein the upper threshold value is larger than the lower threshold value.
In a preferred embodiment of the present invention, first, the magnitude relationship between the electromotive force difference and the preset upper threshold and lower threshold is determined, and a preset voltage state is output according to the determination result of the magnitude relationship; and judging whether the charging circuit has an open circuit fault according to the change condition of the output voltage state.
Further, outputting the preset voltage state according to the judgment result of the magnitude relation includes: when the electromotive force difference is larger than the upper limit threshold value, outputting a high level; when the electromotive force difference is smaller than the lower limit threshold, outputting a low level; and outputting the current voltage state when the electromotive force difference is between the upper limit threshold and the lower limit threshold.
Further, judging whether the charging line has an open circuit fault according to the change condition of the output voltage state includes: when the output voltage state is changed from a low level to a high level, judging that the charging circuit has an open circuit fault, and performing fault reminding; and/or when the output voltage state changes from high level to low level, determining that the open circuit fault of the charging circuit disappears, and eliminating fault reminding.
Other specific implementation details of the method for detecting a disconnection fault of a charging line of a vehicle in the embodiment of the present invention are the same as those of the following device for detecting a disconnection fault of a charging line of a vehicle, and will be described in detail below with reference to fig. 2, 3, and 4, and are not described again here.
Fig. 2 is a schematic diagram of a connection method between a charging line of a vehicle and a device for detecting a disconnection fault of the charging line of the vehicle according to an embodiment of the present invention, and as shown in fig. 2, a detection unit 10 is connected to a generator 30 and a battery 40 respectively to collect an electromotive force at an output end of the generator 30 and an electromotive force at a positive electrode of the battery 40, and to perform a difference between the two electromotive forces, determine a magnitude relationship between an electromotive force difference and a preset upper threshold and a preset lower threshold, and output a determination result to a control unit 20.
Fig. 3 is a block diagram of a device for detecting a disconnection fault of a charging line of a vehicle according to an embodiment of the present invention, and as shown in fig. 3, the device may include: the detection unit 10 is used for acquiring the electromotive force of the output end of the generator 30 of the vehicle and the electromotive force of the positive pole of the storage battery 40 of the vehicle, and judging the magnitude relation between the electromotive force difference value between the electromotive force of the output end of the generator 30 and the electromotive force of the positive pole of the storage battery 40 and a preset upper limit threshold value and a preset lower limit threshold value, wherein the upper limit threshold value is larger than the lower limit threshold value; and a control unit 20, configured to determine whether the charging line has an open-circuit fault according to the determination result of the magnitude relationship.
In a preferred embodiment of the present invention, the detecting unit 10 includes a disconnection fault detecting module (not shown in fig. 3, and fig. 4 is a schematic diagram of the disconnection fault detecting module in a preferred embodiment of the present invention) configured with an input end and an output end, wherein the input end (not shown in fig. 3, and shown by the first input end 13 and the second input end 14 in fig. 4) is used for collecting an electromotive force at the output end of the generator 30 and an electromotive force at the positive electrode of the battery 40, and the disconnection fault detecting module is used for determining a magnitude relation between an electromotive force difference and an upper limit threshold value and a lower limit threshold value; and an output terminal (not shown in fig. 3, shown as an output terminal 15 in fig. 4) for outputting a preset voltage state according to a judgment result of the detection module on the magnitude relationship; and the control unit 20 is used for judging whether the open circuit fault occurs in the charging line according to the change condition of the output voltage state.
In a preferred embodiment of the present invention, the open circuit fault detection module includes a hysteresis comparator (not shown in fig. 3, but shown as hysteresis comparator 12 in fig. 4) for presetting an upper threshold and a lower threshold, and determining the magnitude relationship between the electromotive force difference and the upper threshold and the lower threshold.
Specifically, when the electromotive force difference is larger than the upper limit threshold, the output terminal 15 outputs a high level; when the electromotive force difference is smaller than the lower threshold, the output terminal 15 outputs a low level; and the output terminal 15 outputs the present voltage state when the electromotive force difference is between the upper limit threshold and the lower limit threshold.
It should be noted that "the output terminal 15 outputs the current voltage state" is a detailed explanation of the voltage state output by the output terminal 15 when the electromotive force difference is between the upper threshold and the lower threshold, specifically, when the electromotive force difference is larger than the upper threshold, the output terminal 15 outputs a high level, and when the voltage difference falls below the upper threshold but has not yet fallen below the lower threshold, the output terminal 15 keeps outputting the high level. Similarly, when the electromotive force difference is smaller than the lower threshold, the output terminal 15 outputs a low level, and when the electromotive force difference rises to be larger than the lower threshold and has not yet risen to the upper threshold, the output terminal 15 keeps outputting the low level.
In the preferred embodiment of the present invention, the control unit 20 determines whether the open circuit fault occurs in the charging circuit according to the variation of the voltage state output by the output terminal 15. When the voltage state output by the output end 15 changes from low level to high level, the open circuit fault of the charging circuit is judged, and fault reminding is carried out; when the voltage state output by the output terminal 15 changes from a high level to a low level, it is determined that the open circuit fault of the charging line disappears, and the fault prompt is eliminated.
The following describes a specific operation principle of the open circuit fault detection device for a charging line of a vehicle according to an embodiment of the present invention with reference to fig. 4, and fig. 4 is a schematic diagram of an open circuit fault detection module in a specific application example of the open circuit fault detection device for a charging line of a vehicle according to an embodiment of the present invention.
The open-circuit fault detection module comprises an operational amplifier 11, a non-inverting input end resistor Rc 'of the operational amplifier 11, an inverting input end resistor Rc of the operational amplifier 11, an operational amplifier resistor Rf', a negative feedback loop resistor Rf, a hysteresis comparator 12, a non-inverting input end resistor R1 of the hysteresis comparator 12, an inverting input end resistor R3 of the hysteresis comparator 12, a positive feedback loop resistor R2, resistors R5 and R6.
The non-inverting input terminal of the operational amplifier 11 is used as the first input terminal 13 of the checking module, the non-inverting input terminal of the operational amplifier 11 is used as the second input terminal 14 of the checking module, the first input terminal 13 is connected with the output terminal of the generator 30 of the vehicle, and the second input terminal 14 is connected with the positive pole of the storage battery 40 of the vehicle, so as to collect the electromotive force of the output terminal of the generator 30 and the electromotive force of the positive pole of the storage battery 40. The output of the hysteresis comparator 12 serves as the output 15 of the detection module.
The operational amplifier 11 makes a difference between the electromotive force of the output terminal of the generator 30 and the electromotive force of the positive electrode of the battery 40, and supplies the electromotive force difference to the non-inverting input terminal of the hysteresis comparator 12. The inverting input of the hysteretic comparator 12 may be provided with a reference voltage value for controlling the upper and lower thresholds of the hysteretic comparator 12. Through repeated experimental measurement, the electromotive force difference between the output end of the generator 30 and the positive electrode of the storage battery 40 of the charging line of the vehicle under the normal condition is 0.2V, and according to the actual working condition of the charging line of the vehicle, the lower limit threshold of the hysteresis comparator 12 is set to be 0.5V by combining a plurality of experimental results to avoid the error judgment of the open circuit fault of the charging line of the vehicle. Since the electromotive force of the output terminal of the generator 30 is 14V when the charging circuit is disconnected and the electromotive force of the positive electrode of the battery 40 is 13V when the SOC (State of Charge) of the battery 40 is 100%, the upper limit threshold of the hysteresis comparator 12 is set to 1V.
When the difference between the electromotive forces of the output terminal of the generator 30 and the positive electrode of the battery 40 is greater than the upper limit threshold, the output terminal 15 outputs a high level to the control unit 20, and when the difference between the electromotive forces is less than the lower limit threshold, the output terminal 15 outputs a low level to the control unit 20.
The control unit 20 determines whether the charging circuit has a disconnection fault according to the change of the voltage state output by the output terminal 15, determines that the charging circuit has the disconnection fault when the voltage state output by the output terminal 15 changes from a low level to a high level, and performs fault reminding, and determines that the disconnection fault of the charging circuit disappears and cancels the fault reminding when the voltage state output by the output terminal 15 changes from the high level to the low level.
Preferably, the control unit 20 sets up the fault lamp that opens circuit of charging line, when the electromotive force difference is greater than the upper limit threshold value, utilizes the high level drive of output 15 output to light the mode of the fault lamp that opens circuit of charging line, carries out the trouble and reminds, and when the electromotive force difference was less than the lower limit threshold value, output 15 output low level, the fault lamp that opens circuit of charging line extinguishes.
Further, in the embodiment of the present invention, the control unit 20 is integrated into the control instrument of the vehicle, and in practical applications, the control unit 20 may be integrated into the control instrument of the vehicle or installed as a separate controller at a suitable position inside the vehicle as required.
In the detection module, the non-inverting input terminal resistor Rc' of the operational amplifier 11, the inverting input terminal resistor Rc, and the non-inverting input terminal resistor R1 and the inverting input terminal resistor R3 of the hysteresis comparator 12 each have a current limiting resistor, so that the power consumption of the detection unit can be reduced by reducing the input current, and the safety protection function can be achieved by controlling the voltage at the input terminal of the hysteresis comparator 12.
Further, the operational amplifier resistance Rf' of the operational amplifier 11 can increase the input impedance of the operational amplifier, and reduce the input voltage attenuation of the operational amplifier 11. The negative feedback loop resistance Rf of the operational amplifier 11 can be used to determine the amplification of the operational amplifier 11. The resistors R5 and R6 are used to provide a reference voltage required by the inverting input terminal of the hysteretic comparator 12, so that the hysteretic comparator 12 can set a reasonable upper threshold and lower threshold.
In addition, the positive feedback loop resistor R2 of the hysteresis comparator 12 can ensure that the voltage state of the output terminal 15 changes rapidly along with the input terminal of the hysteresis comparator 12, so as to ensure the timeliness of the detection module for detecting the open circuit fault of the charging circuit.
Through the technical scheme, the hysteresis comparator 12 is used for processing the electromotive force difference, when the electromotive force difference is between the upper limit threshold and the lower limit threshold, the output end 15 outputs the current voltage state, namely the output level is unchanged, and the control unit 20 keeps the current state, so that whether the open circuit fault occurs in the charging circuit can be accurately judged and reminded, the occurrence of error reminding is avoided, the trouble of a user is increased, and the complaint of the user is caused.
Simultaneously, this scheme is through when the charging line breaks circuit fault, in time reminds, makes the driver in time discover this trouble to immediately, lean on the limit to park and wait for help, or go to near maintenance point as early as possible and maintain. The vehicle controller effectively avoids the situation that a driver cannot find that the charging line is broken in time, and continues to drive the vehicle until the electric appliance of the vehicle exhausts the electric quantity of the storage battery (or is about to exhaust), so that the vehicle cannot continue to run, and further effectively avoids accidental injury to the vehicle and the driver when the fault occurs on a highway or on a road with more vehicles. Simultaneously, in time discover the trouble of charging circuit, can guarantee in time to charge to the battery, effectively reduce the emergence number of battery insufficient voltage phenomenon to the life of extension vehicle battery.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A method for detecting an open circuit fault of a charging line of a vehicle, the method comprising:
Acquiring the electromotive force of the output end of a generator of the vehicle and the electromotive force of the positive pole of a storage battery of the vehicle; and
judging whether the charging circuit has an open circuit fault according to the relationship between the electromotive force difference value between the electromotive force of the output end of the generator and the electromotive force of the anode of the storage battery and a preset upper limit threshold value and a preset lower limit threshold value respectively,
wherein the upper threshold is greater than the lower threshold.
2. The method of claim 1, wherein the determining whether the charging line has an open circuit fault comprises:
judging the size relationship between the electromotive force difference and a preset upper limit threshold and a preset lower limit threshold respectively, and outputting a preset voltage state according to the judgment result of the size relationship; and
and judging whether the charging circuit has an open circuit fault according to the change condition of the output voltage state.
3. The method of claim 2, wherein the outputting of the preset voltage state according to the determination result of the magnitude relationship comprises:
when the electromotive force difference is larger than the upper limit threshold value, outputting a high level;
When the electromotive force difference is smaller than the lower limit threshold, outputting a low level; and
and when the electromotive force difference value is between the upper limit threshold and the lower limit threshold, outputting the current voltage state.
4. The method of claim 3, wherein the determining whether the charging line has an open circuit fault according to the variation of the output voltage state comprises:
when the output voltage state is changed from a low level to a high level, judging that the charging circuit has an open circuit fault, and performing fault reminding; and/or
And when the output voltage state is changed from a high level to a low level, judging that the open circuit fault of the charging circuit disappears, and eliminating the fault prompt.
5. An open circuit fault detection device of a charging line of a vehicle, characterized by comprising:
the detection unit is used for acquiring the electromotive force of the output end of a generator of the vehicle and the electromotive force of the anode of a storage battery of the vehicle, and judging the relationship between the electromotive force difference value between the electromotive force of the output end of the generator and the electromotive force of the anode of the storage battery and a preset upper limit threshold and a preset lower limit threshold respectively, wherein the upper limit threshold is larger than the lower limit threshold; and
And the control unit is used for judging whether the charging circuit has an open circuit fault according to the judgment result of the magnitude relation.
6. The apparatus for detecting an open circuit fault of a charging line of a vehicle according to claim 5, wherein the detection unit includes an open circuit fault detection module configured with an input terminal and an output terminal:
the open circuit fault detection module is used for judging the size relationship between the electromotive force difference value and the upper limit threshold value and the lower limit threshold value respectively, the input end of the open circuit fault detection module is used for collecting the electromotive force of the output end of the generator and the electromotive force of the anode of the storage battery, and the output end of the open circuit fault detection module is used for outputting a preset voltage state according to the judgment result of the size relationship of the detection module; and is
The control unit is used for judging whether the charging circuit has an open circuit fault according to the judgment result of the magnitude relation, and comprises the following steps: and judging whether the charging circuit has an open circuit fault according to the change condition of the output voltage state.
7. The apparatus according to claim 6, wherein the open circuit fault detection module comprises a hysteresis comparator for presetting the upper threshold and the lower threshold and determining a magnitude relationship between the electromotive force difference and the upper threshold and the lower threshold.
8. The apparatus for detecting a disconnection fault of a charging line of a vehicle according to claim 6, wherein the outputting of the preset voltage state by the output terminal according to the determination result of the magnitude relation comprises:
when the electromotive force difference value is larger than the upper limit threshold value, the output end outputs a high level;
when the electromotive force difference is smaller than the lower limit threshold, the output end outputs a low level; and
and when the electromotive force difference value is between the upper limit threshold value and the lower limit threshold value, the output end outputs the current voltage state.
9. The apparatus for detecting a disconnection fault of a charging line of a vehicle according to claim 8, wherein the control unit determining whether the disconnection fault of the charging line occurs according to a variation of the output voltage state includes:
when the voltage state output by the output end is changed from low level to high level, judging that the charging circuit has open circuit fault, and performing fault reminding; and/or
And when the voltage state output by the output end is changed from high level to low level, judging that the open circuit fault of the charging circuit disappears, and eliminating the fault prompt.
10. A vehicle characterized by being provided with the disconnection fault detection device of the charging line of the vehicle according to any one of claims 5 to 9.
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| CN201910345176.3A CN111856331B (en) | 2019-04-26 | 2019-04-26 | Method and device for detecting open-circuit fault of charging circuit of vehicle and vehicle |
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| CN201910345176.3A CN111856331B (en) | 2019-04-26 | 2019-04-26 | Method and device for detecting open-circuit fault of charging circuit of vehicle and vehicle |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113203888A (en) * | 2021-04-30 | 2021-08-03 | 广东电网有限责任公司韶关供电局 | Non-voltage detection method, device, equipment and storage medium for grounding disconnecting link |
| CN114690077A (en) * | 2020-12-30 | 2022-07-01 | 维谛技术有限公司 | Wiring detection method and device |
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| CN116946050A (en) * | 2023-04-25 | 2023-10-27 | 奇瑞新能源汽车股份有限公司 | A system and method for intelligent power replenishment of vehicles using solar energy |
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