CN113805097A - DC/DC broken line detection method and device, controller and automobile - Google Patents
DC/DC broken line detection method and device, controller and automobile Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/54—Testing for continuity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
- G01R31/007—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks using microprocessors or computers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/74—Testing of fuses
Abstract
The invention discloses a DC/DC disconnection detection method, a device, a controller and a storage medium. The method comprises the following steps: acquiring disconnection detection data in real time, wherein the disconnection detection data comprises DC/DC output voltage, DC/DC output current and storage battery power supply voltage; performing voltage detection based on the DC/DC output voltage and the power supply voltage of the storage battery to obtain a voltage detection result; performing current detection based on the DC/DC output current to obtain a current detection result; and acquiring a wire breakage detection result based on the voltage detection result and the current detection result. The technical scheme of the invention can judge whether the DC/DC converter is in the disconnection state in time, and improve the safety of the DC/DC disconnection detection method.
Description
Technical Field
The invention relates to the field of automobile accessories, in particular to a DC/DC disconnection detection method, a device, a controller and an automobile.
Background
A DC/DC converter is a device in a direct current circuit that changes electrical energy at one voltage level to electrical energy at another voltage level. The DC/DC converter is commonly used on automobiles, converts high-voltage direct current into low-voltage 12V direct current, and provides a 12V working power supply for an on-board controller on the automobile.
When the DC/DC converter is used for an automobile, the automobile also comprises a DC/DC detection controller, a storage battery, a fuse and a display device. The DC/DC detection controller is connected with the storage battery, the DC/DC converter and the display device, the DC/DC converter is connected with the fuse, the fuse is connected with the storage battery, when the fuse is damaged, the DC/DC converter is in a disconnection state, and normal work of the vehicle-mounted controller is influenced, so that whether the DC/DC converter is in the disconnection state or not needs to be judged, and the DC/DC detection controller reports a fault through the display device in real time so as to process the whole vehicle. In the prior art, after the DC/DC converter is in a disconnection state, the supply voltage of the storage battery is reduced, and when the supply voltage of the storage battery is lower than the feed voltage of the storage battery, the whole vehicle can judge that the output line of the DC/DC converter is in a disconnection state. The method cannot timely judge the disconnection fault of the DC/DC converter, and the fault can be prompted only when the power supply voltage of the storage battery is lower than the feed voltage of the storage battery, so that poor user experience is brought. And when the feed appears in the driving in-process battery, can bring the potential safety hazard to can seriously influence the life-span of battery after the battery feeds many times.
Disclosure of Invention
The embodiment of the invention provides a DC/DC disconnection detection method, a device, a controller and an automobile, and aims to solve the problem that the disconnection state of a DC/DC converter cannot be detected in time.
A DC/DC disconnection detection method includes:
acquiring disconnection detection data in real time, wherein the disconnection detection data comprises DC/DC output voltage, DC/DC output current and storage battery power supply voltage;
performing voltage detection based on the DC/DC output voltage and the power supply voltage of the storage battery to obtain a voltage detection result;
carrying out current detection based on the DC/DC output current to obtain a current detection result;
and acquiring a disconnection detection result based on the voltage detection result and the current detection result.
Further, the voltage detection based on the DC/DC output voltage and the battery supply voltage, and obtaining a voltage detection result includes:
obtaining a comparison voltage difference value based on the DC/DC output voltage and the storage battery power supply voltage;
and comparing the comparison voltage difference value with a preset voltage difference value to obtain a voltage detection result.
Further, the comparing the comparison voltage difference value with a preset voltage difference value to obtain a voltage detection result includes:
if the comparison voltage difference value is larger than the preset voltage difference value, the voltage detection result is abnormal;
and if the comparison voltage difference value is not larger than the preset voltage difference value, judging that no abnormity exists in the voltage detection result.
Further, the current detection based on the DC/DC output current to obtain a current detection result includes:
and carrying out current detection based on the DC/DC output current and a preset comparison current to obtain a current detection result.
Further, the current detection based on the DC/DC output current and a preset comparison current to obtain a current detection result includes:
if the DC/DC output current is smaller than the preset comparison current, the current detection result is abnormal;
and if the DC/DC output current is not less than the preset comparison current, judging that no abnormality exists in the current detection result.
Further, the obtaining a wire breakage detection result based on the voltage detection result and the current detection result includes:
if the voltage detection result is abnormal and the current detection result is abnormal, acquiring abnormal duration, and judging whether the abnormal duration is longer than preset duration or not;
if the abnormal duration is longer than the preset duration, the disconnection detection result is that disconnection exists between the DC/DC converter and the storage battery;
and if the voltage detection result indicates that no abnormality exists, or the current detection result indicates that no abnormality exists, or the abnormality duration is not longer than the preset duration, determining that no disconnection exists between the DC/DC converter and the storage battery.
Further, after the obtaining of the wire breakage detection result based on the voltage detection result and the current detection result, the DC/DC wire breakage detection method further includes:
and if the disconnection detection result indicates that the disconnection exists between the DC/DC converter and the storage battery, executing a disconnection fault reminding mechanism.
A DC/DC disconnection detecting apparatus comprising:
the data acquisition module is used for acquiring disconnection detection data in real time, wherein the disconnection detection data comprises DC/DC output voltage, DC/DC output current and storage battery power supply voltage;
the voltage detection module is used for carrying out voltage detection based on the DC/DC output voltage and the power supply voltage of the storage battery to obtain a voltage detection result;
the current detection module is used for carrying out current detection based on the DC/DC output current to obtain a current detection result;
and the detection result acquisition module is used for acquiring a wire breakage detection result based on the voltage detection result and the current detection result.
A DC/DC detection controller comprising a memory, a processor and a DC/DC converter detection program stored in said memory and operable on said processor, wherein said processor implements the above DC/DC disconnection detection method when executing said DC/DC converter detection program.
An automobile comprises a storage battery and a DC/DC converter, and is characterized by further comprising the above DC/DC detection controller, wherein the DC/DC detection controller is connected with the storage battery, the DC/DC converter and a display device and is used for detecting the disconnection of the DC/DC converter through the storage battery.
According to the DC/DC disconnection detection method, the device, the computer equipment and the storage medium, the DC/DC detection controller can detect the disconnection detection data in time according to the collected disconnection detection data by collecting the disconnection detection data in real time, obtain the voltage detection result and the current detection result, judge whether the DC/DC converter is in a disconnection state or not based on the voltage detection result and the current detection result, and obtain the disconnection detection result, so that the DC/DC detection controller can judge whether the DC/DC converter is in the disconnection state or not in time, and the safety of the DC/DC disconnection detection method is improved. Further, the DC/DC detection controller judges whether the DC/DC converter is in a disconnection state or not based on the voltage detection result and the current detection result, and improves the accuracy of the DC/DC disconnection detection method under the condition that the DC/DC output voltage, the DC/DC output current and the power supply voltage of the storage battery are unstable.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a flow chart of a DC/DC disconnection detection method according to an embodiment of the present invention;
FIG. 2 is another flow chart of a DC/DC disconnection detection method according to an embodiment of the present invention;
FIG. 3 is another flow chart of a DC/DC disconnection detection method according to an embodiment of the present invention;
FIG. 4 is another flow chart of a DC/DC disconnection detection method according to an embodiment of the present invention;
FIG. 5 is another flow chart of a DC/DC disconnection detection method according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a DC/DC disconnection detection apparatus according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a computer device according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment provides a DC/DC disconnection detection method, which can be applied to a DC/DC detection controller, where the DC/DC detection controller can perform voltage detection on disconnection detection data in time according to the collected disconnection detection data by collecting disconnection detection data in real time, obtain a voltage detection result and a current detection result, judge whether a DC/DC converter is in a disconnection state based on the voltage detection result and the current detection result, and obtain the disconnection detection result, so that the DC/DC detection controller can judge whether the DC/DC converter is in the disconnection state in time, and improve the safety of the DC/DC disconnection detection method. Further, the DC/DC detection controller judges whether the DC/DC converter is in a disconnection state or not based on the voltage detection result and the current detection result, and improves the accuracy of the DC/DC disconnection detection method under the condition that the DC/DC output voltage, the DC/DC output current and the power supply voltage of the storage battery are unstable.
In an embodiment, as shown in fig. 1, a DC/DC disconnection detection method is provided, which is described by taking a DC/DC detection controller as an example, and includes the following steps:
s10: and collecting disconnection detection data in real time, wherein the disconnection detection data comprises DC/DC output voltage, DC/DC output current and storage battery power supply voltage.
The disconnection detection data is data for detecting whether the DC/DC converter is in a disconnection state, and is data acquired in real time, including but not limited to DC/DC output voltage, DC/DC output current, and storage battery supply voltage. The DC/DC output voltage is the voltage output by the DC/DC converter. The DC/DC output current is the current output by the DC/DC converter. The power supply voltage of the storage battery is the voltage output by the storage battery. As an example, the secondary battery may be any one of a nickel-cadmium battery, a nickel-hydrogen battery, a lithium ion battery, a lithium polymer battery, and a lead-acid battery.
Specifically, the disconnection detection data is collected in real time. As an example, the DC/DC detection controller collects the DC/DC output voltage and the battery supply voltage in real time through the voltage sampling circuit; and the DC/DC output current is acquired in real time through a current sampling circuit. The voltage sampling circuit is a circuit for sampling the DC/DC output voltage and the power supply voltage of the storage battery in real time. The current sampling circuit is a circuit for sampling the DC/DC output current in real time. In this example, the DC/DC detection controller can timely determine whether the DC/DC converter is in the disconnection state through the disconnection detection data acquired in real time, so as to avoid potential safety hazards caused by disconnection of the DC/DC converter and improve the safety of the DC/DC disconnection detection method.
S20: and detecting the voltage based on the DC/DC output voltage and the power supply voltage of the storage battery, and acquiring a voltage detection result.
The voltage detection result is a detection result for detecting whether the DC/DC converter is in a disconnection state based on the DC/DC output voltage and the storage battery power supply voltage. The voltage detection mode is specifically to detect the difference between the DC/DC output voltage and the power supply voltage of the storage battery.
Specifically, the voltage detection result is obtained by detecting based on the difference between the DC/DC output voltage and the battery supply voltage. As an example, when the DC/DC converter is in a disconnection state, the DC/DC converter stops outputting to the storage battery due to a line disconnection between the DC/DC converter and the storage battery. Accordingly, after the DC/DC converter stops charging the storage battery, the power of the storage battery is continuously consumed, the power supply voltage of the storage battery is reduced, the DC/DC output voltage is greater than the power supply voltage of the storage battery, and at this time, the DC/DC converter may be in a disconnection state. Therefore, the DC/DC detection controller detects the difference value between the DC/DC output voltage and the power supply voltage of the storage battery, and acquires the voltage detection result based on the difference value between the DC/DC output voltage and the power supply voltage of the storage battery, so that the DC/DC detection controller can further judge whether the DC/DC converter is in a disconnection state by performing voltage detection on the DC/DC output voltage and the power supply voltage of the storage battery and acquiring the voltage detection result, and the safety of the DC/DC disconnection detection method is improved.
S30: and carrying out current detection based on the DC/DC output current to obtain a current detection result.
The current detection result is a detection result for detecting whether the DC/DC converter is in a disconnection state based on the DC/DC output current. The current detection is to detect the magnitude of the DC/DC output current.
Specifically, because the DC/DC detection control has a risk of misjudging the voltage detection result, the DC/DC detection controller detects the magnitude of the DC/DC output current, and based on the DC/DC output current, obtains the current detection result to further judge whether the DC/DC converter is in the disconnection state, thereby further improving the safety of the DC/DC disconnection detection method. .
As an example, when the DC/DC converter is in a disconnection state, the DC/DC converter stops outputting to the storage battery due to a line disconnection between the DC/DC converter and the storage battery, and the DC/DC output current changes. Therefore, the DC/DC detection controller obtains the DC/DC output current by carrying out current detection on the DC/DC output current, and obtains a current detection result based on the DC/DC output current, so that the DC/DC detection controller can further judge whether the DC/DC converter is in a disconnection state by carrying out current detection on the DC/DC output current and obtaining the current detection result, and the safety of the DC/DC disconnection detection method is improved.
S40: and acquiring a wire breakage detection result based on the voltage detection result and the current detection result.
And the disconnection detection result is the result of whether the DC/DC converter is disconnected or not. It is understood that the difference between the DC/DC output voltage and the battery supply voltage in the open state of the DC/DC converter can be detected based on the voltage detection result; the DC/DC output current in the open state of the DC/DC converter can be detected based on the current detection result. And the DC/DC detection controller performs logic detection on the voltage detection result and the current detection result, judges whether the DC/DC converter is in a disconnection state or not and acquires a disconnection detection result.
In this embodiment, the DC/DC detection controller can detect the disconnection detection data in time according to the collected disconnection detection data by collecting the disconnection detection data in real time, and obtain a voltage detection result and a current detection result, and determine whether the DC/DC converter is in a disconnection state or not based on the voltage detection result and the current detection result, so that the DC/DC detection controller can determine whether the DC/DC converter is in a disconnection state or not in time, and the safety of the DC/DC disconnection detection method is improved. Further, the DC/DC detection controller judges whether the DC/DC converter is in a disconnection state or not based on the voltage detection result and the current detection result, and improves the accuracy of the DC/DC disconnection detection method under the condition that the DC/DC output voltage, the DC/DC output current and the power supply voltage of the storage battery are unstable.
In one embodiment, as shown in fig. 2, the step S20 of performing voltage detection based on the DC/DC output voltage and the battery supply voltage, and acquiring the voltage detection result includes:
s21: and acquiring a comparison voltage difference value based on the DC/DC output voltage and the power supply voltage of the storage battery.
And the comparison voltage difference value is the voltage difference value between the DC/DC output voltage and the power supply voltage of the storage battery.
Specifically, when the DC/DC converter is in a disconnection state, the output to the storage battery is stopped, the electric quantity of the storage battery is continuously consumed, and the power supply voltage of the storage battery is reduced and is smaller than the DC/DC output voltage. When the power supply voltage of the storage battery is less than the feed voltage of the storage battery, the storage battery is easy to be lost, and potential safety hazards are brought. The storage battery feed voltage refers to the lowest voltage when the storage battery supplies power. The DC/DC detection controller compares the DC/DC output voltage with the storage battery supply voltage to obtain a comparison voltage difference value between the DC/DC output voltage and the storage battery supply voltage, and further judges whether the DC/DC converter is in a disconnection state or not by comparing the voltage difference value, so that the storage battery is prevented from being lost, and the safety of the DC/DC disconnection detection method is improved.
As an example, when the DC/DC converter is in a disconnection state, the DC/DC converter stops outputting to the storage battery due to a line disconnection between the DC/DC converter and the storage battery. Accordingly, after the DC/DC converter stops charging the storage battery, the power of the storage battery is continuously consumed, the power supply voltage of the storage battery is reduced, the DC/DC output voltage is greater than the power supply voltage of the storage battery, and at this time, the DC/DC converter may be in a disconnection state. Therefore, the DC/DC detection controller can judge whether the DC/DC output voltage is larger than the power supply voltage of the storage battery by obtaining the comparison voltage difference value between the DC/DC output voltage and the power supply voltage of the storage battery, and further judge whether the DC/DC converter is in a disconnection state, so that the DC/DC detection controller obtains a voltage detection result based on the comparison voltage difference value and timely judges whether the DC/DC converter is in the disconnection state.
S22: and comparing the comparison voltage difference value with a preset voltage difference value to obtain a voltage detection result.
The preset voltage difference value is a voltage value set by a user, and is used for being compared with the comparison voltage difference value.
Specifically, when the DC/DC output voltage is greater than the battery supply voltage, the comparison voltage difference is obtained, but if the comparison voltage difference is large, the battery supply voltage may already be less than the battery feed voltage, which is prone to battery loss and brings about a potential safety hazard. The preset voltage difference value is determined according to the difference value between the DC/DC output voltage and the storage battery feed voltage, the preset voltage difference value is smaller than the difference value between the DC/DC output voltage and the storage battery feed voltage, if the comparison voltage difference value is larger than the preset voltage difference value, the storage battery supply voltage may be already smaller than the storage battery feed voltage, the storage battery is easily damaged, and potential safety hazards are brought. Therefore, when the DC/DC converter is judged to be in the disconnection state, the DC/DC converter can be judged to be in the disconnection state in time before the power supply voltage of the storage battery reaches the feed voltage of the storage battery by comparing the voltage difference value with the preset voltage difference value, and the storage battery is prevented from being damaged and potential safety hazards are caused when the power supply voltage of the storage battery is smaller than the feed voltage of the storage battery.
In the embodiment, the DC/DC detection controller compares the DC/DC output voltage with the storage battery supply voltage to obtain a comparison voltage difference between the DC/DC output voltage and the storage battery supply voltage, so as to further judge whether the DC/DC converter is in a disconnection state by comparing the voltage difference, thereby avoiding potential safety hazards caused by disconnection of the DC/DC converter; through the comparison of the comparison voltage difference value and the preset voltage difference value, the DC/DC converter can be timely judged to be in a disconnection state before the supply voltage of the storage battery reaches the feed voltage of the storage battery, the problem that potential safety hazards are even brought to a loss storage battery when the supply voltage of the storage battery is smaller than the feed voltage of the storage battery is solved, and the safety is guaranteed and the service life of the storage battery is prolonged.
In an embodiment, as shown in fig. 3, in step S22, the comparing the comparison voltage difference value with the preset voltage difference value, and the obtaining the voltage detection result includes:
s221: and if the comparison voltage difference value is larger than the preset voltage difference value, determining that the voltage detection result is abnormal.
The voltage detection result indicating that the abnormality exists means that the DC/DC converter may have a disconnection state.
Specifically, if the comparison voltage difference is greater than the preset voltage difference, that is, the difference between the DC/DC output voltage and the power supply voltage of the storage battery is greater than the preset voltage difference, and the difference between the DC/DC output voltage and the power supply voltage of the storage battery is too large, at this time, the power supply voltage of the storage battery is too low, and the feed voltage of the storage battery is easily reached, and the storage battery is consumed, so that if the comparison voltage difference is greater than the preset voltage difference, the voltage detection result indicates that there is an abnormality.
S222: and if the comparison voltage difference value is not larger than the preset voltage difference value, judging that no abnormity exists in the voltage detection result.
Wherein, the voltage detection result is that the DC/DC converter has no disconnection state.
Specifically, if the comparison voltage difference is smaller than the preset voltage difference, the difference between the DC/DC output voltage and the power supply voltage of the storage battery is smaller than the preset voltage difference, and the difference between the DC/DC output voltage and the power supply voltage of the storage battery is smaller, at this time, the power supply voltage of the storage battery is much larger than the power supply voltage of the storage battery, and therefore, if the comparison voltage difference is smaller than the preset voltage difference, the voltage detection result is that there is no abnormality.
For example, the preset voltage difference is set to 1.5V and the battery feeding voltage is set to 9V. In an example, if the DC/DC output voltage is 12V and the battery supply voltage is 10V, the comparison voltage difference is 2V, at this time, the comparison voltage difference 2V is greater than the preset voltage difference 1.5V, and the battery supply voltage 10V approaches to the battery feed voltage 9V, so that the DC/DC converter may have a disconnection state, the voltage detection result obtained by the DC/DC detection controller is abnormal, and the DC/DC converter is determined to be in the disconnection state, so as to prevent the battery from being lost when the battery supply voltage 10V continues to be lower than the battery feed voltage 9V. In another example, if the DC/DC output voltage is 12V and the battery supply voltage is 11.5V, the comparison voltage difference is 0.5V, and at this time, the comparison voltage difference 0.5V is smaller than the preset voltage difference 1.5V, and the battery supply voltage 11.5V is much larger than the battery feed voltage 9V, so that the DC/DC converter has no possibility of a wire break state.
In this embodiment, the DC/DC detection controller obtains the voltage detection result as abnormal or non-abnormal based on the comparison between the comparison voltage difference and the preset voltage difference, and then determines that the DC/DC converter is in a disconnection state, so as to prevent the battery from being damaged when the supply voltage of the battery is less than the supply voltage of the battery, thereby avoiding the potential safety hazard caused by disconnection of the DC/DC converter.
In one embodiment, in step S30, performing current detection based on the DC/DC output current, and obtaining a current detection result, the method includes: and carrying out current detection based on the DC/DC output current and a preset comparison current to obtain a current detection result.
The preset comparison current is a current value set by a user, and is used for being compared with the DC/DC output current. The preset comparison current is set according to the minimum current in a circuit loop in which the DC/DC converter and the storage battery are arranged. As an example, in a car where the DC/DC converter and the battery are located, the preset comparison current is set according to a minimum current in a circuit loop of an electronic system in the car.
Specifically, when the voltage detection result is that there is an abnormality, further detection of the DC/DC output current is required because there is a risk of erroneous determination of the voltage detection result. The DC/DC detection controller carries out current detection on the DC/DC output current and a preset comparison current to obtain a current detection result so as to further judge whether the DC/DC converter is in a disconnection state or not and avoid potential safety hazards caused by disconnection of the DC/DC converter.
As an example, when the DC/DC converter is in a disconnection state, the DC/DC converter stops outputting the battery due to the disconnection of the line between the DC/DC converter and the battery, and the DC/DC output current becomes small. Therefore, the DC/DC detection controller compares the DC/DC output current with the preset comparison current to achieve the purpose of current detection and obtain the current detection result. In this example, the DC/DC detection controller can obtain the current detection result by performing current detection on the DC/DC output current and the preset comparison current to determine whether the DC/DC converter is in the disconnection state, so as to improve the safety of the DC/DC disconnection detection method.
In this embodiment, because the voltage detection result has a risk of misjudgment, the DC/DC detection controller performs current detection on the DC/DC output current and a preset comparison current, obtains a current detection result, and further determines whether the DC/DC converter is in a disconnection state, thereby improving the safety of the DC/DC disconnection detection method.
In one embodiment, as shown in fig. 4, in step S30, the current detection is performed based on the DC/DC output current and a preset comparison current, and the obtaining of the current detection result includes:
s31: and if the DC/DC output current is smaller than the preset comparison current, judging that the current detection result is abnormal.
The current detection result indicating that there is an abnormality indicates that there is a possibility of a disconnection state.
Specifically, when the voltage detection result is abnormal, in order to eliminate the risk of misjudgment of the voltage detection result, the DC/DC detection controller performs current detection on the DC/DC output current and a preset comparison current, and acquires a current detection result to further judge whether the DC/DC converter is in a disconnection state. Since the preset comparison current is determined based on the minimum current in the circuit loop in which the DC/DC converter and the secondary battery are located, it may be detected that the DC/DC converter is in a disconnection state to stop the output of the DC/DC output current or that the DC/DC output current is unstable when the DC/DC output current is smaller than the preset comparison current. The DC/DC detection controller obtains a current detection result as abnormal through that the DC/DC output current is smaller than the preset comparison current so as to further judge whether the DC/DC converter is in a disconnection state or not, and potential safety hazards caused by disconnection of the DC/DC converter are avoided.
S32: and if the DC/DC output current is not less than the preset comparison current, judging that no abnormity exists in the current detection result.
The current detection result indicating that there is no abnormality indicates that the DC/DC converter is not in a disconnection state.
Specifically, due to the minimum current in the circuit loop in which the DC/DC converter and the secondary battery are located, when the DC/DC output current is larger than the preset comparison current, it is possible to detect that the DC/DC converter normally outputs the DC/DC output current. And the DC/DC detection controller obtains a current detection result as no abnormity when the DC/DC output current is larger than the preset comparison current.
In this embodiment, when the voltage detection result is abnormal, in order to eliminate the risk of erroneous determination of the voltage detection result, the DC/DC detection controller performs current detection on the DC/DC output current and a preset comparison current, and obtains the current detection result to further determine whether the DC/DC converter is in a disconnection state. The DC/DC detection controller detects whether the DC/DC converter is in a disconnection state or not by comparing the DC/DC output current with a preset comparison current and further judges whether the DC/DC converter is in the disconnection state or not so as to avoid potential safety hazards caused by disconnection of the DC/DC converter.
In one embodiment, as shown in fig. 5, the obtaining of the disconnection detection result based on the voltage detection result and the current detection result in step S40 includes:
s41: and if the voltage detection result is abnormal and the current detection result is abnormal, acquiring abnormal duration and judging whether the abnormal duration is longer than preset duration.
The abnormality duration is a time during which the voltage detection result and the current detection result are both abnormal. The preset duration is the time set by a user, and is used for judging whether the DC/DC converter is in a disconnection state.
Specifically, when the voltage detection result indicates that there is an abnormality and the current detection result indicates that there is an abnormality, it can be understood that, at this time, the comparison voltage difference between the DC/DC output voltage and the battery supply voltage is greater than the preset voltage difference, the DC/DC output current is greater than the preset comparison current, and the DC/DC converter may be in a disconnection state. The DC/DC detection controller further judges whether the DC/DC converter is in a disconnection state by acquiring the abnormal duration and judging whether the abnormal duration is greater than the preset duration so as to avoid potential safety hazards caused by disconnection of the DC/DC converter.
For example, a preset voltage difference value is set to 1.5V, a preset comparison current is set to 8A, a preset duration is set to 30 seconds, and a battery feed voltage is set to 9V. In an example, if the DC/DC output voltage is 12V and the battery supply voltage is 10V, the comparison voltage difference is 2V, at this time, the comparison voltage difference 2V is greater than the preset voltage difference 1.5V, and the battery supply voltage 10V approaches to the battery feed voltage 9V, so that the DC/DC converter may have a disconnection state, and further detect the current detection result, if the DC/DC output current is 1A, the DC/DC output current 1A is smaller than the preset comparison current 8A, in order to prevent the DC/DC output voltage, the battery supply voltage, and the DC/DC output current from being unstable when the voltage detection result and the current detection result are detected. If the abnormal duration time acquired by the DC/DC detection controller is 40 seconds, the DC/DC detection controller judges that the abnormal duration time is 40 seconds longer than the preset duration time for 30 seconds, and the detection result of the disconnection is that the disconnection exists between the DC/DC converter and the storage battery.
Further, if the current detection result indicates that there is no abnormality or the current detection result indicates that there is no abnormality, the DC/DC detection controller detects that there is no disconnection between the DC/DC converter and the storage battery as the disconnection detection result. It is to be understood that, when the current detection result or the current detection result includes therein the current detection result or the current detection result in which there is no abnormality, the DC/DC detection controller detects the disconnection detection result as the absence of the disconnection between the DC/DC converter and the secondary battery.
S42: and if the abnormal duration is longer than the preset duration, the disconnection detection result indicates that the disconnection exists between the DC/DC converter and the storage battery.
Specifically, when the abnormal duration is longer than the preset duration, the comparison voltage difference between the DC/DC output voltage and the storage battery supply voltage is continuously larger than the preset voltage difference, the DC/DC output current is continuously larger than the preset comparison current, the condition that the DC/DC output voltage, the storage battery supply voltage and the DC/DC output current are unstable is eliminated, and the DC/DC detection controller detects that the disconnection detection result is that the disconnection exists between the DC/DC converter and the storage battery.
S43: and if the voltage detection result indicates that no abnormality exists, or the current detection result indicates that no abnormality exists, or the abnormality duration is not longer than the preset duration, the disconnection detection result indicates that no disconnection exists between the DC/DC converter and the storage battery.
As an example, when the voltage detection result is that there is no abnormality, it can be understood that, at this time, the comparison voltage difference value between the DC/DC output voltage and the power supply voltage of the storage battery is smaller than the preset voltage difference value, and the DC/DC detection controller detects that there is no disconnection between the DC/DC converter and the storage battery as the disconnection detection result.
As an example, when the current detection result is that there is no abnormality, it is understood that the DC/DC output current is smaller than the preset comparison current, and the DC/DC detection controller detects the disconnection detection result as that there is no disconnection between the DC/DC converter and the secondary battery.
As an example, when the abnormality duration is not greater than the preset duration, there is a case where the DC/DC output voltage, the secondary battery supply voltage, and the DC/DC output current are unstable, the disconnection detection result is that there is no disconnection between the DC/DC converter and the secondary battery.
In the embodiment, the DC/DC detection controller eliminates the influence on the disconnection detection of the DC/DC converter when the DC/DC output voltage, the storage battery power supply voltage and the DC/DC output current are unstable through the voltage detection result, the current detection result, the abnormal duration and the preset duration, and improves the reliability of the DC/DC disconnection detection method.
In one embodiment, after the step S40, after acquiring the disconnection detection result based on the voltage detection result and the current detection result, the method includes: and if the disconnection detection result indicates that the disconnection exists between the DC/DC converter and the storage battery, executing a disconnection fault reminding mechanism.
The disconnection fault reminding mechanism is used for sending fault reminding to a user when the disconnection detection result is that the disconnection exists between the DC/DC converter and the storage battery. Optionally, the disconnection fault reminding mechanism may specifically be that the disconnection fault reminding mechanism is displayed by a display device, or alarms by an alarm device.
Specifically, the DC/DC detection controller is used for timely reminding a user of detecting the DC/DC converter when the disconnection detection result is that the disconnection exists between the DC/DC converter and the storage battery, so that the storage battery is prevented from reaching the storage battery feed voltage due to the disconnection of the DC/DC converter, the service life of the storage battery is prolonged, and the practicability and the safety of the DC/DC disconnection detection method are improved.
In this embodiment, the DC/DC detection controller executes the disconnection fault prompting mechanism, and when the disconnection detection result indicates that there is a disconnection between the DC/DC converter and the storage battery, timely prompts a user to detect the DC/DC converter, so as to prevent the storage battery from reaching the storage battery feed voltage due to the disconnection of the DC/DC converter, increase the service life of the storage battery, and improve the practicability and safety of the DC/DC disconnection detection method.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
In an embodiment, a DC/DC converter disconnection detecting device is provided, which corresponds to the DC/DC converter disconnection detecting method in the above embodiments one to one. As shown in fig. 6, the DC/DC converter disconnection detecting apparatus includes a data acquiring module 10, a voltage detecting module 20, a current detecting module 30, and a detection result acquiring module 40. The functional modules are explained in detail as follows:
the data acquisition module 10 is used for acquiring disconnection detection data in real time, wherein the disconnection detection data comprises DC/DC output voltage, DC/DC output current and storage battery power supply voltage;
the voltage detection module 20 is configured to perform voltage detection based on the DC/DC output voltage and the battery supply voltage to obtain a voltage detection result;
the current detection module 30 is configured to perform current detection based on the DC/DC output current to obtain a current detection result;
and a detection result obtaining module 40, configured to obtain a disconnection detection result based on the voltage detection result and the current detection result.
Further, the voltage detection module 20 includes:
the difference value obtaining submodule is used for obtaining a comparison voltage difference value based on the DC/DC output voltage and the power supply voltage of the storage battery;
and the difference value comparison submodule is used for comparing the comparison voltage difference value with a preset voltage difference value to obtain a voltage detection result.
Further, the voltage detection module 20 further includes:
the first difference comparison submodule is used for determining that the voltage detection result is abnormal when the comparison voltage difference is larger than the preset voltage difference;
and the second difference comparison submodule is used for determining that the voltage detection result is not abnormal when the comparison voltage difference is not greater than the preset voltage difference.
Further, the current detection module 30 includes:
and the comparison current submodule is used for carrying out current detection on the basis of the DC/DC output current and a preset comparison current to obtain a current detection result.
Further, the current detection module 30 further includes:
the first current comparison submodule is used for determining that the current detection result is abnormal when the DC/DC output current is smaller than the preset comparison current;
and the second current comparison submodule is used for determining that no abnormality exists in the current detection result when the DC/DC output current is not less than the preset comparison current.
Further, the detection result obtaining module 40 includes:
the first time judgment submodule is used for acquiring the abnormal duration and judging whether the abnormal duration is longer than the preset duration or not when the voltage detection result is abnormal and the current detection result is abnormal;
the second time judgment submodule is used for judging whether the abnormal duration is longer than the preset duration or not, and judging whether the line is broken between the DC/DC converter and the storage battery according to the line breaking detection result;
and the third time judgment submodule is used for judging that the disconnection between the DC/DC converter and the storage battery exists in the disconnection detection result when the voltage detection result is abnormal, or the current detection result is abnormal, or the abnormal duration is not longer than the preset duration.
Further, the DC/DC converter disconnection detecting apparatus further includes:
and the fault reminding module is used for executing a disconnection fault reminding mechanism when the disconnection detection result indicates that the disconnection exists between the DC/DC converter and the storage battery.
For specific limitations of the DC/DC converter disconnection detecting device, reference may be made to the above limitations of the DC/DC converter disconnection detecting method, which are not described herein again. The modules in the DC/DC converter disconnection detecting apparatus may be implemented in whole or in part by software, hardware, and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a DC/DC detection controller is provided, the internal structure of which may be as shown in fig. 7. The DC/DC detection controller includes a processor, a memory, a network interface, and a database connected by a system bus. Wherein the processor of the DC/DC detection controller is configured to provide computational and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The nonvolatile storage medium stores an operating system, a DC/DC converter detection program, and a database. The internal memory provides an environment for the operation of the operating system and the DC/DC converter detection program in the nonvolatile storage medium. The database of the computer device is used for DC/DC disconnection detection. The network interface of the DC/DC detection controller is used for communicating with an external terminal through a network connection. The DC/DC converter detection program is executed by a processor to implement a DC/DC disconnection detection method.
In an embodiment, a DC/DC detection controller is provided, which includes a memory, a processor, and a DC/DC converter detection program stored in the memory and capable of running on the processor, and when the processor executes the DC/DC converter detection program, the DC/DC disconnection detection method in the foregoing embodiment is implemented, for example, steps S10 to S40, which are not repeated herein to avoid repetition. Alternatively, the processor implements the functions of the respective modules/units in the DC/DC converter disconnection detecting apparatus in this embodiment, for example, the functions of the modules 10 to 40, when executing the DC/DC converter detecting program. To avoid repetition, further description is omitted here.
In one embodiment, an automobile is provided, which comprises a storage battery, a DC/DC converter and the above DC/DC detection controller, wherein the DC/DC detection controller is connected with the storage battery, the DC/DC converter and a display device and is used for detecting the disconnection of the DC/DC converter through the storage battery.
Specifically, the DC/DC detection controller can detect the disconnection detection data in time according to the collected disconnection detection data by collecting the disconnection detection data in real time, obtain a voltage detection result and a current detection result, and determine whether the DC/DC converter is in a disconnection state based on the voltage detection result and the current detection result, so as to obtain a disconnection detection result. So that the DC/DC detection controller can judge whether the DC/DC converter is in a disconnection state in time. Furthermore, the DC/DC detection controller executes a disconnection fault reminding mechanism, and when the disconnection detection result indicates that a disconnection exists between the DC/DC converter and the storage battery, the DC/DC detection controller reminds a user of detecting the DC/DC converter through the display device in time, so that the situation that the storage battery reaches the storage battery feed voltage due to the disconnection of the DC/DC converter, the storage battery is damaged, and potential safety hazards are caused is avoided.
It will be understood by those skilled in the art that all or part of the processes of the methods of the above embodiments may be implemented by instructing the relevant hardware through a DC/DC converter detection program, which may be stored in a non-volatile computer readable storage medium, and when executed, the DC/DC converter detection program may include the processes of the embodiments of the methods as described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A DC/DC disconnection detection method is characterized by comprising the following steps:
acquiring disconnection detection data in real time, wherein the disconnection detection data comprises DC/DC output voltage, DC/DC output current and storage battery power supply voltage;
performing voltage detection based on the DC/DC output voltage and the power supply voltage of the storage battery to obtain a voltage detection result;
carrying out current detection based on the DC/DC output current to obtain a current detection result;
and acquiring a disconnection detection result based on the voltage detection result and the current detection result.
2. The DC/DC disconnection detection method of claim 1, wherein performing voltage detection based on the DC/DC output voltage and the battery supply voltage, and obtaining a voltage detection result comprises:
obtaining a comparison voltage difference value based on the DC/DC output voltage and the storage battery power supply voltage;
and comparing the comparison voltage difference value with a preset voltage difference value to obtain a voltage detection result.
3. The DC/DC disconnection detecting method of claim 2, wherein the comparing the comparison voltage difference value with a preset voltage difference value to obtain a voltage detection result comprises:
if the comparison voltage difference value is larger than the preset voltage difference value, the voltage detection result is abnormal;
and if the comparison voltage difference value is not larger than the preset voltage difference value, judging that no abnormity exists in the voltage detection result.
4. The DC/DC disconnection detecting method according to claim 1, wherein the current detection based on the DC/DC output current to obtain a current detection result comprises:
and carrying out current detection based on the DC/DC output current and a preset comparison current to obtain a current detection result.
5. The DC/DC disconnection detection method of claim 4, wherein the current detection based on the DC/DC output current and a preset comparison current to obtain a current detection result comprises:
if the DC/DC output current is smaller than the preset comparison current, the current detection result is abnormal;
and if the DC/DC output current is not less than the preset comparison current, judging that no abnormality exists in the current detection result.
6. The DC/DC disconnection detecting method of claim 1, wherein the obtaining of the disconnection detection result based on the voltage detection result and the current detection result comprises:
if the voltage detection result is abnormal and the current detection result is abnormal, acquiring abnormal duration, and judging whether the abnormal duration is longer than preset duration or not;
if the abnormal duration is longer than the preset duration, the disconnection detection result is that disconnection exists between the DC/DC converter and the storage battery;
and if the voltage detection result indicates that no abnormality exists, or the current detection result indicates that no abnormality exists, or the abnormality duration is not longer than the preset duration, determining that no disconnection exists between the DC/DC converter and the storage battery.
7. The DC/DC disconnection detecting method according to claim 1, wherein after said obtaining a disconnection detection result based on the voltage detection result and the current detection result, the DC/DC disconnection detecting method further comprises:
and if the disconnection detection result indicates that the disconnection exists between the DC/DC converter and the storage battery, executing a disconnection fault reminding mechanism.
8. A DC/DC converter disconnection detecting device, comprising:
the data acquisition module is used for acquiring disconnection detection data in real time, wherein the disconnection detection data comprises DC/DC output voltage, DC/DC output current and storage battery power supply voltage;
the voltage detection module is used for carrying out voltage detection based on the DC/DC output voltage and the power supply voltage of the storage battery to obtain a voltage detection result;
the current detection module is used for carrying out current detection based on the DC/DC output current to obtain a current detection result;
and the detection result acquisition module is used for acquiring a wire breakage detection result based on the voltage detection result and the current detection result.
9. A DC/DC detection controller comprising a memory, a processor and a DC/DC converter detection program stored in the memory and executable on the processor, wherein the processor implements the DC/DC converter detection program when executing the DC/DC converter detection program to implement the DC/DC disconnection detection method of any one of claims 1 to 7.
10. An automobile comprising a storage battery and a DC/DC converter, further comprising the DC/DC detection controller of claim 9, the DC/DC detection controller being connected to the storage battery, the DC/DC converter and a display device for detecting disconnection of the DC/DC converter by the storage battery.
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Effective date of registration: 20211231 Address after: 511400 No.36 Longying Road, Shilou Town, Panyu District, Guangzhou City, Guangdong Province Applicant after: GAC AIAN New Energy Vehicle Co.,Ltd. Address before: 510030 23 building, Cheng Yue mansion 448-458, Dongfeng Middle Road, Yuexiu District, Guangzhou, Guangdong. Applicant before: GUANGZHOU AUTOMOBILE GROUP Co.,Ltd. |