CN111965428A - Insulation resistance detection method, device, equipment and storage medium - Google Patents
Insulation resistance detection method, device, equipment and storage medium Download PDFInfo
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- CN111965428A CN111965428A CN202010777242.7A CN202010777242A CN111965428A CN 111965428 A CN111965428 A CN 111965428A CN 202010777242 A CN202010777242 A CN 202010777242A CN 111965428 A CN111965428 A CN 111965428A
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/025—Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters
Abstract
The embodiment of the application discloses a detection method, a device, equipment and a storage medium of an insulation resistor, wherein the detection method comprises the following steps: firstly, determining a target voltage ratio to be updated in the detection; then determining a target closing switch and a target opening switch; secondly, controlling a target closing switch to be closed, controlling a target opening switch to be disconnected, and collecting a first target voltage; calculating to obtain a second target voltage according to the first target voltage; calculating the ratio of the first target voltage to the second target voltage to obtain a target voltage ratio; and finally, calculating the resistance value of the first insulation resistor and the resistance value of the second insulation resistor according to the target voltage ratio, the unrefreshed voltage ratio, the resistance value of the first reference resistor and the resistance value of the second reference resistor. The resistance value of the corresponding insulation resistor can be calculated by alternately updating the target voltage ratio every time, so that the speed of calculating the insulation resistor is increased, and the response speed of the change of the insulation resistor is increased.
Description
Technical Field
The application relates to the technical field of computers, in particular to a method, a device, equipment and a storage medium for detecting insulation resistance.
Background
The power battery system of the electric automobile is provided with the insulation resistor, the insulation resistor needs to be measured in the using process of the power battery, and the resistance value of the insulation resistor is determined, so that the detection of the power battery is realized.
In the prior art, the insulation resistors are respectively connected in parallel with the corresponding floating capacitors, and are influenced by charging and discharging of the floating capacitors, so that the time for measuring the insulation resistors is long, and the change of the insulation resistors cannot be responded in time.
Disclosure of Invention
In view of this, embodiments of the present disclosure provide a method, an apparatus, a device, and a storage medium for detecting an insulation resistance, which can improve a measurement speed of the insulation resistance.
In order to solve the above problem, the technical solution provided by the embodiment of the present application is as follows:
in a first aspect, the present application provides a method for detecting an insulation resistance, where the insulation resistance includes a first insulation resistance and a second insulation resistance; the first end of the power supply is connected with the first end of the first insulation resistor, and the second end of the first insulation resistor is connected with the second end of the power supply through the second insulation resistor; the series branch circuit of the first switch and the first reference resistor is connected in parallel at two ends of the first insulation resistor; the first floating capacitor is connected in parallel with two ends of the first insulation resistor; the second switch and a series branch of a second reference resistor are connected in parallel at two ends of the second insulation resistor; the second floating capacitor is connected in parallel with two ends of the second insulation resistor; the common end of the first insulation resistor and the second insulation resistor is grounded;
the method comprises the following steps:
determining a target voltage ratio to be updated in the current detection;
determining a target closing switch according to the target voltage ratio to be updated, and determining switches except the target closing switch as target opening switches; the target closing switch is the first switch or the second switch;
controlling the target closing switch to be closed, controlling the target opening switch to be disconnected, and collecting a first target voltage; the first target voltage is the voltage at two ends of a first insulation resistor when the first insulation resistor is connected with the first reference resistor in parallel or the voltage at two ends of a second insulation resistor when the second insulation resistor is connected with the second reference resistor in parallel;
calculating to obtain a second target voltage according to the first target voltage;
calculating the ratio of the first target voltage to the second target voltage to obtain a target voltage ratio;
calculating to obtain the resistance value of the first insulation resistor and the resistance value of the second insulation resistor according to the target voltage ratio, the unrefreshed voltage ratio, the resistance value of the first reference resistor and the resistance value of the second reference resistor; the non-updated voltage ratio is the target voltage ratio updated by the last detection.
Optionally, the determining the target voltage ratio to be updated in the current detection includes:
acquiring a target voltage ratio updated by the last detection;
if the updated target voltage ratio is detected to be the second voltage ratio last time, the updated target voltage ratio is the first voltage ratio;
wherein the first voltage ratio is a ratio of a first voltage to ground voltage and a second voltage to ground voltage; the first voltage-to-ground is a voltage across the first insulation resistor when the first insulation resistor is connected in parallel with the first reference resistor, and the second voltage-to-ground is a voltage across the second insulation resistor;
the second voltage ratio is a ratio of a third voltage to ground, which is a voltage across the first insulation resistor, and a fourth voltage to ground, which is a voltage across a second insulation resistor when the second insulation resistor is connected in parallel with the second reference resistor;
if the updated target voltage ratio is detected to be the first voltage ratio last time, the updated target voltage ratio is the second voltage ratio;
determining a target closing switch according to a target voltage ratio to be updated, and determining switches except the target closing switch as target opening switches, wherein the method comprises the following steps:
if the target voltage ratio is a first voltage ratio, determining the first switch as a target closing switch according to the first voltage ratio, and determining the second switch as a target opening switch;
and if the target voltage ratio is a second voltage ratio, determining the second switch as the target closing switch according to the second voltage ratio, and determining the first switch as a target opening switch.
Optionally, if the target voltage ratio updated by the last detection is not available, the method further includes:
judging whether an initial voltage ratio exists;
if the initial voltage ratio does not exist, controlling the first switch and the second switch to be closed;
collecting a fifth voltage to ground and a sixth voltage to ground;
the fifth voltage to ground is the voltage at two ends of the first insulation resistor when the first insulation resistor is connected with the first reference resistor in parallel; the sixth voltage to ground is the voltage across the second insulation resistor when the second insulation resistor is connected in parallel with the second reference resistor;
and calculating the ratio of the fifth voltage to ground to the sixth voltage to ground to obtain an initial voltage ratio.
Optionally, if the target voltage ratio updated by the last detection is not available, the method further includes:
judging whether an initial voltage ratio exists;
if the initial voltage ratio exists, determining the target voltage ratio detected this time as a first voltage ratio or a second voltage ratio;
if the target voltage ratio detected this time is a first voltage ratio, after the first voltage ratio is obtained, calculating according to the first voltage ratio and the initial voltage ratio to obtain the resistance value of the first insulation resistor and the resistance value of the second insulation resistor;
if the voltage ratio detected this time is a second voltage ratio, after the second voltage ratio is obtained, the resistance value of the first insulation resistor and the resistance value of the second insulation resistor are calculated according to the second voltage ratio and the initial voltage ratio.
Optionally, the controlling the target closing switch to be closed, controlling the target opening switch to be opened, and collecting a first target voltage includes:
controlling the target closing switch to be closed, controlling the target opening switch to be opened, and collecting first judgment voltage according to a time sequence at a first preset collection interval;
and calculating a difference value between the first judgment voltages, and acquiring a first target voltage when the difference value between the first judgment voltages is smaller than a first preset voltage difference value threshold value.
Optionally, the calculating a difference between the first determination voltages, and when the difference between the first determination voltages is smaller than a first preset voltage difference threshold, acquiring a first target voltage, includes:
calculating a difference value between the first judgment voltages, and collecting a first preset number of first preprocessing voltages when the difference value between the first judgment voltages is smaller than a first preset voltage difference value threshold; the first preset number is an odd number;
and sequencing the first preprocessing voltages of the first preset number according to the voltage value, and taking the first preprocessing voltages at the middle position as first target voltages.
Optionally, the calculating a second target voltage according to the first target voltage includes:
acquiring a power supply voltage of the power supply;
and calculating the difference value between the power supply voltage and the first target voltage to obtain a second target voltage.
In a second aspect, the present application provides a device for detecting an insulation resistance, where the insulation resistance includes a first insulation resistance and a second insulation resistance; the first end of the power supply is connected with the first end of the first insulation resistor, and the second end of the first insulation resistor is connected with the second end of the power supply through the second insulation resistor; the series branch circuit of the first switch and the first reference resistor is connected in parallel at two ends of the first insulation resistor; the first floating capacitor is connected in parallel with two ends of the first insulation resistor; the second switch and a series branch of a second reference resistor are connected in parallel at two ends of the second insulation resistor; the second floating capacitor is connected in parallel with two ends of the second insulation resistor; the common end of the first insulation resistor and the second insulation resistor is grounded;
the detection device includes:
the ratio determining unit is used for determining a target voltage ratio to be updated in the current detection;
the switch determining unit is used for determining a target closing switch according to the target voltage ratio to be updated and determining switches except the target closing switch as target opening switches; the target closing switch is the first switch or the second switch;
the acquisition unit is used for controlling the target closing switch to be closed, controlling the target opening switch to be disconnected and acquiring a first target voltage; the first target voltage is the voltage at two ends of a first insulation resistor when the first insulation resistor is connected with the first reference resistor in parallel or the voltage at two ends of a second insulation resistor when the second insulation resistor is connected with the second reference resistor in parallel;
the first calculating unit is used for calculating to obtain a second target voltage according to the first target voltage;
the second calculating unit is used for calculating the ratio of the first target voltage to the second target voltage to obtain a target voltage ratio;
the third calculating unit is used for calculating the resistance value of the first insulating resistor and the resistance value of the second insulating resistor according to the target voltage ratio, the unrefreshed voltage ratio, the resistance value of the first reference resistor and the resistance value of the second reference resistor; the non-updated voltage ratio is the target voltage ratio updated by the last detection.
In a third aspect, the present application provides an insulation resistance detecting apparatus, including: a processor, a memory, a system bus;
the processor and the memory are connected through the system bus;
the memory is for storing one or more programs, the one or more programs including instructions, which when executed by the processor, cause the processor to perform the method of any of the above.
In a fourth aspect, the present application provides a computer-readable storage medium having stored therein instructions that, when run on a terminal device, cause the terminal device to perform any of the methods described above.
Therefore, the embodiment of the application has the following beneficial effects:
according to the detection method of the insulation resistance, the target voltage ratio to be updated in the current detection is determined; determining a target closing switch according to the target voltage ratio to be updated, and determining switches except the target closing switch as target opening switches; the target closing switch is the first switch or the second switch; secondly, controlling the target closing switch to be closed, controlling the target opening switch to be disconnected, and collecting a first target voltage; the first target voltage is the voltage at two ends of a first insulation resistor when the first insulation resistor is connected with the first reference resistor in parallel or the voltage at two ends of a second insulation resistor when the second insulation resistor is connected with the second reference resistor in parallel; calculating to obtain a second target voltage according to the first target voltage; calculating the ratio of the first target voltage to the second target voltage to obtain a target voltage ratio; finally, calculating the resistance value of the first insulation resistor and the resistance value of the second insulation resistor according to the target voltage ratio, the unrefreshed voltage ratio, the resistance value of the first reference resistor and the resistance value of the second reference resistor; the non-updated voltage ratio is the target voltage ratio updated by the last detection. Therefore, the target voltage ratio is obtained by determining the target voltage ratio to be updated at this time, collecting the first target voltage and calculating the second target voltage, and the resistance values of the first insulation resistor and the second insulation resistor can be calculated according to the updated target voltage ratio, the target voltage ratio updated last time and the resistance values of the first reference resistor and the second reference resistor. The target voltage ratio is alternately updated every time, the resistance value of the corresponding insulation resistor can be calculated, the speed of calculating the insulation resistor is improved, and the response speed of the insulation resistor change is improved.
Drawings
Fig. 1 is a schematic block diagram of an exemplary application scenario of a detection method of an insulation resistance according to an embodiment of the present application;
fig. 2 is a flowchart of a method for detecting an insulation resistance according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of a method for detecting an insulation resistance according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram of a method for detecting an insulation resistance according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram of a method for detecting an insulation resistance according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of an insulation resistance detection apparatus according to an embodiment of the present application.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the drawings are described in detail below.
In order to facilitate understanding and explaining the technical solutions provided by the embodiments of the present application, the following description will first describe the background art of the present application.
After studying a conventional insulation resistance detection method, the inventors found that since insulation resistances are connected in parallel to corresponding floating capacitors, respectively, charging and discharging of the floating capacitors affects detection of the insulation resistance. The traditional detection method is to control a plurality of floating capacitors to be fully charged and discharged at the same time, measure the voltages at two ends of the insulation resistor when the floating capacitors are fully charged, measure the voltages at two ends of the insulation resistor after the floating capacitors are discharged, and calculate the insulation resistor by using the two obtained voltages. And then, calculating according to the voltage obtained by one-time charging and discharging, and so on to obtain the resistance values of the insulation resistors in different time periods. However, a general power battery system has a plurality of insulation resistors, and thus, when the detection of the voltage at both ends of the insulation resistor is performed after the completion of the charging and discharging of the floating capacitor, the measurement period of the resistor is long, and the change of the insulation resistor cannot be quickly responded.
Based on this, the embodiment of the application provides a method for detecting an insulation resistance, which determines a target voltage ratio to be updated in the current detection; determining a target closing switch according to the target voltage ratio to be updated, and determining switches except the target closing switch as target opening switches; the target closing switch is the first switch or the second switch; controlling the target closing switch to be closed, controlling the target opening switch to be disconnected, and collecting a first target voltage; the first target voltage is the voltage at two ends of a first insulation resistor when the first insulation resistor is connected with the first reference resistor in parallel or the voltage at two ends of a second insulation resistor when the second insulation resistor is connected with the second reference resistor in parallel; calculating to obtain a second target voltage according to the first target voltage; calculating the ratio of the first target voltage to the second target voltage to obtain a target voltage ratio; calculating to obtain the resistance value of the first insulation resistor and the resistance value of the second insulation resistor according to the target voltage ratio, the unrefreshed voltage ratio, the resistance value of the first reference resistor and the resistance value of the second reference resistor; the non-updated voltage ratio is the target voltage ratio updated by the last detection.
In order to facilitate understanding of the method for detecting the insulation resistance provided in the embodiment of the present application, an application scenario of the method for detecting the insulation resistance provided in the embodiment of the present application is described below with reference to fig. 1. Fig. 1 is a schematic frame diagram of an exemplary application scenario of the detection method of the insulation resistance according to the embodiment of the present application. The method for detecting the insulation resistance provided by the embodiment of the application can be applied to measurement of the insulation resistance in a power battery system.
In practical application, the insulation resistor may include a first insulation resistor and a second insulation resistor, and the detection circuit of the insulation resistor includes the power supply V and the first insulation resistor RpA second insulation resistor RnA first switch K1A second switch K2A first reference resistor R1A second reference resistor R2A first floating capacitor C1A second floating capacitor C2。
A first terminal of a power supply V and the first insulation resistor RpIs connected to the first terminal of the first insulating resistor RpThrough said second insulation resistor RnIs connected with the second end of the power supply V; first switch K1And a first reference resistance R1Is connected in parallel to the first insulation resistor RpBoth ends of (a); a first floating capacitor C1Is connected in parallel with the first insulation resistor RpBoth ends of (a); second switch K2And a second reference resistor R2Is connected in parallel to the second insulation resistor RnBoth ends of (a); second floating capacitor C2Is connected in parallel with the second insulation resistor RnBoth ends of (a); the first insulation resistor RpAnd the second insulation resistance RnIs grounded. At the first insulation resistor RpAlso has a first measuring point for measuring a first insulation resistance RpThe voltage across; at the second insulation resistance RnHas a second measuring point for measuring a second insulation resistance RnThe voltage across the terminals.
Determining a target voltage ratio to be updated in the current detection; and controlling the corresponding switch to be switched on and switched off according to the target voltage ratio to obtain a first collected target voltage, calculating according to the first target voltage to obtain a second target voltage so as to obtain a target voltage ratio, and calculating according to the target voltage ratio updated last time and the resistance value of the reference resistor to obtain the resistance value of the insulation resistor.
Those skilled in the art will appreciate that the schematic diagram shown in fig. 1 is only one example in which embodiments of the present application may be implemented. The scope of applicability of the embodiments of the present application is not limited in any way by this framework.
In order to facilitate understanding of the technical solutions provided in the embodiments of the present application, a method for detecting an insulation resistance provided in the embodiments of the present application will be described below with reference to the accompanying drawings.
Referring to fig. 2, which is a flowchart of a method for detecting an insulation resistance according to an embodiment of the present disclosure, as shown in fig. 2, the method may include S201 to S206:
s201: and determining the target voltage ratio to be updated in the detection.
During the use process of the power battery, the resistance value of the insulation resistor needs to be detected. In the embodiment of the application, by detecting the target voltage ratio, the ratio of the resistance value of the resistor can be obtained according to the resistor corresponding to the voltage, so that the resistance value of the insulation resistor can be calculated.
In the embodiment of the present application, the insulation resistance may be calculated according to the updated target voltage ratio and the updated target voltage ratio obtained by the last detection. The corresponding target voltage ratio is obtained by controlling the corresponding switch and changing the circuit structure, a corresponding equation can be established according to the resistance value of the reference resistor and the resistance value of the insulation resistor, and the resistance value of the insulation resistor can be obtained by calculation according to the equation.
The embodiment of the application does not limit the trigger time for determining the updated target voltage ratio, and can automatically judge whether the floating capacitor charging is finished to trigger the detection according to different floating capacitors.
Because the structure of the detection circuit needs to be changed every time, the target voltage ratio to be updated in the detection is determined first, and then the switch is controlled to change the connection mode of the detection circuit.
The target voltage ratio is a ratio of the detected voltages. The specific value of the target voltage ratio is related to the specific structure of the circuit, and the structure of the detection circuit can be adjusted according to the target voltage ratio which is determined to be updated in the detection.
Specifically, in one possible implementation, the updated target voltage ratio may be obtained by measurement because the connection mode of the circuit needs to be changed alternately. Determining a target voltage ratio to be updated in the current detection, including:
acquiring a target voltage ratio updated by the last detection;
if the updated target voltage ratio is detected to be the second voltage ratio last time, the updated target voltage ratio is the first voltage ratio;
wherein the first voltage ratio is a ratio of a first voltage to ground voltage and a second voltage to ground voltage; the first voltage-to-ground is a voltage across the first insulation resistor when the first insulation resistor is connected in parallel with the first reference resistor, and the second voltage-to-ground is a voltage across the second insulation resistor;
the second voltage ratio is a ratio of a third voltage to ground, which is a voltage across the first insulation resistor, and a fourth voltage to ground, which is a voltage across a second insulation resistor when the second insulation resistor is connected in parallel with the second reference resistor;
if the updated target voltage ratio is detected to be the first voltage ratio last time, the updated target voltage ratio is the second voltage ratio.
In the embodiment of the present application, the target voltage ratio is determined by detecting the updated target voltage ratio last time, and the alternating detection of the first voltage ratio and the second voltage ratio can be realized, so that the resistance value of the insulation resistor is calculated according to the first voltage ratio and the second voltage ratio.
S202: determining a target closing switch according to the target voltage ratio to be updated, and determining switches except the target closing switch as target opening switches; the target close switch is the first switch or the second switch.
And determining a target closing switch according to the determined target voltage ratio, and determining switches except the target closing switch as target opening switches. The switch needing to be closed and the switch needing to be opened are determined according to the determined target voltage ratio, the connection mode of the circuit is changed, and then the required voltage is acquired, so that the target voltage ratio is obtained. The target closing switch is a first switch or a second switch, and the corresponding target opening switch is a second switch or a first switch.
In one possible implementation manner, when the target voltage ratio is the first voltage ratio or the second voltage ratio, determining a target off switch according to the target voltage ratio to be updated, and determining switches other than the target off switch as target on switches includes:
if the target voltage ratio is a first voltage ratio, determining the first switch as a target closing switch according to the first voltage ratio, and determining the second switch as a target opening switch;
and if the target voltage ratio is a second voltage ratio, determining the second switch as the target closing switch according to the second voltage ratio, and determining the first switch as a target opening switch.
S203: controlling the target closing switch to be closed, controlling the target opening switch to be disconnected, and collecting a first target voltage; the first target voltage is a voltage across the first insulation resistor when the first insulation resistor is connected in parallel with the first reference resistor or a voltage across the second insulation resistor when the second insulation resistor is connected in parallel with the second reference resistor.
And controlling the target closing switch to be closed and the target opening switch to be opened. It can be understood that, if the first switch is closed, the first reference resistor is connected in parallel with the first insulation resistor, and at this time, the voltage across the first insulation resistor when the first insulation resistor is connected in parallel with the first reference resistor can be collected as the first target voltage. Referring to fig. 3, the figure is a schematic diagram of a method for detecting an insulation resistance according to an embodiment of the present application.
If the second switch is closed, the second reference resistor is connected in parallel with the second insulation resistor, and at this time, the voltage at two ends of the second insulation resistor when the second insulation resistor is connected in parallel with the second reference resistor can be collected as the first target voltage. Referring to fig. 4, the figure is a schematic diagram of a method for detecting an insulation resistance according to an embodiment of the present application.
In one possible implementation, after the target off switch is controlled to be turned on and the target on switch is turned off, the voltage is not stable, and the first target voltage needs to be acquired after the voltage is stable.
Controlling the target closing switch to be closed, controlling the target opening switch to be disconnected, and collecting a first target voltage, comprising:
controlling the target closing switch to be closed, controlling the target opening switch to be opened, and collecting first judgment voltage according to a time sequence at a first preset collection interval;
and calculating a difference value between the first judgment voltages, and acquiring a first target voltage when the difference value between the first judgment voltages is smaller than a first preset voltage difference value threshold value.
It should be noted that the first preset sampling interval may be a preset time interval for sampling the voltage. After the corresponding target closing switch is controlled to be closed and the corresponding target opening switch is controlled to be opened, the first judgment voltage can be collected. The first judgment voltage corresponds to the voltage of the same resistor as the first target voltage.
If the first switch is closed, the first judgment voltage is the voltage at two ends of the first insulation resistor when the first insulation resistor is connected with the first reference resistor in parallel; if the second switch is closed, the first judgment voltage is the voltage at two ends of the second insulation resistor when the second insulation resistor is connected with the second test resistor in parallel.
After the corresponding switch is controlled to be closed or opened, the acquired voltage is unstable, and the acquisition of the first target voltage is performed after the voltage needs to be determined to be stable. And calculating a difference value between the first judgment voltages, and when the difference value is smaller than a first preset voltage difference value threshold value, considering that the first judgment voltages are stable, and collecting a first target voltage. The first preset voltage difference threshold may be a maximum threshold between preset determination voltages.
Furthermore, in order to ensure that the value of the first target voltage is accurate, a plurality of first preprocessing voltages can be collected, and the plurality of first preprocessing voltages are preprocessed to obtain the accurate first target voltage.
In a possible implementation manner, calculating a difference between the first determination voltages, and acquiring a first target voltage when the difference between the first determination voltages is smaller than a first preset voltage difference threshold includes:
calculating a difference value between the first judgment voltages, and collecting a first preset number of first preprocessing voltages when the difference value between the first judgment voltages is smaller than a first preset voltage difference value threshold; the first preset number is an odd number;
and sequencing the first preprocessing voltages of the first preset number according to the voltage value, and taking the first preprocessing voltages at the middle position as first target voltages.
In this embodiment of the application, when the difference between the first determination voltages is smaller than the first preset voltage difference threshold, the difference between the first determination voltages satisfies the condition of acquiring the first target voltage, and at this time, the first preset number of first preprocessing voltages are acquired, where the first preprocessing voltages correspond to voltages of the same resistors as the first target voltage.
If the first switch is closed, the first preprocessing voltage is the voltage at two ends of the first insulation resistor when the first insulation resistor is connected with the first reference resistor in parallel; if the second switch is closed, the first preprocessing voltage is the voltage at two ends of the second insulation resistor when the second insulation resistor is connected with the second test resistor in parallel.
In order to obtain the accurate first preprocessing voltage, the first preset number is an odd number, so that the odd number of first preprocessing voltages are sorted according to the magnitude of the value, and the first preprocessing voltage with the intermediate value can be obtained as the first target voltage. The first target voltage obtained in this way is the most accurate voltage value in the first preprocessing voltage, and the target voltage ratio obtained through the first target voltage is more accurate, so that the more accurate resistance value of the insulation resistor can be obtained.
S204: and calculating to obtain a second target voltage according to the first target voltage.
The second target voltage may be a voltage across another insulation resistor, so that the resistance value of the insulation resistor may be calculated by a voltage ratio.
In a possible implementation manner, the calculating the second target voltage according to the first target voltage includes:
acquiring a power supply voltage of the power supply; and calculating the difference value between the power supply voltage and the first target voltage to obtain a second target voltage.
It is understood that the first insulation resistor and the second insulation resistor form a loop with the power supply, and the voltage across the first insulation resistor and the voltage across the second insulation resistor are the power supply voltage. The first target voltage may be subtracted from the supply voltage to obtain a second target voltage.
S205: and calculating the ratio of the first target voltage to the second target voltage to obtain a target voltage ratio.
And calculating the ratio of the first target voltage to the second target voltage to obtain the target voltage ratio. In the embodiment of the present application, the target voltage ratio may be obtained by comparing the first target voltage with the second target voltage, or may be obtained by comparing the second target voltage with the second target voltage.
S206: calculating to obtain the resistance value of the first insulation resistor and the resistance value of the second insulation resistor according to the target voltage ratio, the unrefreshed voltage ratio, the resistance value of the first reference resistor and the resistance value of the second reference resistor; the non-updated voltage ratio is the target voltage ratio updated by the last detection.
According to the target voltage ratio, the voltage ratio which is not updated, and the resistance values of the first reference resistor and the second reference resistor, the resistance values of the first insulation resistor and the second insulation resistor can be calculated.
According to the target voltage ratio and the corresponding circuit connection mode, an equation between the target voltage ratio and the first reference resistor, the first insulation resistor and the second insulation resistor, or an equation between the target voltage ratio and the second reference resistor, the first insulation resistor and the second insulation resistor can be obtained. The non-updated voltage ratio is that the updated target voltage ratio obtained by the last detection is different from the circuit connection mode of the current detection, the corresponding equation of the non-updated target voltage ratio is different from the equation of the target voltage ratio obtained at the current time, and the resistance values of the two insulation resistors can be obtained through calculation according to the two equations.
Specifically, when the target voltage ratio is a ratio of a first target voltage to a second target voltage, a formula (1) is obtained according to the target voltage ratio, and the first reference resistance value, the second reference resistance value, and the first insulation resistance value.
V1/V2＝(Rp//R1)/Rn (1)
Wherein, V1Is a first target voltage, i.e. the voltage across the first insulation resistor when the first insulation resistor is connected in parallel with the first reference resistor, V2Is the second target voltage, i.e. the voltage across the second insulation resistor. RpIs the resistance value, R, of the first insulation resistor1Is the resistance value of the first reference resistor, Rp//R1The resistance value of the first insulation resistor and the first reference resistor in parallel is referred to. RnIs the resistance value of the second insulation resistor.
And when the target voltage ratio is the ratio of the third target voltage to the fourth target voltage, obtaining a formula (2) according to the target voltage ratio, the first reference resistance value, the second reference resistance value and the second insulation resistance value.
V3/V4＝Rp/(Rn//R2) (2)
Wherein, V3Is a third target voltage, i.e. the voltage across the second insulation resistor when the second insulation resistor is connected in parallel with the second reference resistor, V4Is the fourth target voltage, i.e., the voltage across the first isolation resistor. RpIs the resistance value, R, of the first insulation resistor2Is the resistance value of the second reference resistor, Rn//R2The resistance value of the second insulation resistor and the second reference resistor in parallel is shown. RnIs the resistance value of the second insulation resistor.
When the resistance value of the first reference resistor and the resistance value of the second reference resistor are both R, the calculated resistance value of the first insulation resistor is as shown in formula (3):
Rp＝R(V3/V4—V1/V2)/(1+V1/V2) (3)
the calculated resistance value of the second insulation resistor is as shown in formula (4):
Rn＝R(V3/V4—V1/V2)/[V1/V2(1+V3/V4)] (4)
in the embodiment of the present application, by alternately updating the target voltage ratio, that is, alternately updating the values of the voltage ratios in the formula (1) and the formula (2), the resistance values of the first insulation resistor and the second insulation resistor can be calculated according to the updated target voltage ratio, the target voltage ratio which is not updated, and the corresponding formula.
In the embodiment of the application, the target voltage ratio corresponding to different circuit connection modes is alternately updated, and the last updated target voltage ratio is used, so that the resistance value of the insulation resistor can be detected. Therefore, the calculation of the resistance value of the insulation resistor can be realized on the basis of one-time detection, the alternate switching through the control switch is realized, the calculation speed of the resistance value of the insulation resistor is accelerated, and the response speed of the change of the insulation resistor is improved.
In addition, the detection method of the insulation resistance provided by the embodiment of the application has strong adaptability, if the floating capacitance capacity is reduced, the detection time can be shortened in the same proportion, and the detection method can be better adapted to the capacity change of the floating capacitance. And the insulation resistor is calculated by adopting a voltage ratio method, so that the current voltage proportional relation can be protected to the greatest extent, the influence of total voltage fluctuation on a calculation result is shielded, and the obtained resistance value of the insulation resistor is more accurate.
In one possible implementation, the current detection may be the first detection without the last updated target voltage ratio. If the target voltage ratio updated by the last detection is not available, the method further comprises the following four steps:
a1: and judging whether the initial voltage ratio exists.
The initial voltage ratio may be a voltage ratio obtained at the first detection.
A2: if the initial voltage ratio does not exist, controlling the first switch and the second switch to be closed; and collecting a fifth voltage to ground and a sixth voltage to ground.
In the embodiment of the application, at the time of the first detection, the first switch and the second switch may be controlled to be closed, and the fifth voltage to ground and the sixth voltage to ground may be collected.
Referring to fig. 5, the figure is a schematic diagram of a method for detecting an insulation resistance according to an embodiment of the present application.
The fifth voltage to ground is a voltage across the first insulation resistor when the first insulation resistor is connected in parallel with the first reference resistor; and the sixth voltage to ground is the voltage at two ends of the second insulation resistor when the second insulation resistor is connected with the second reference resistor in parallel.
A3: and calculating the ratio of the fifth voltage to ground to the sixth voltage to ground to obtain an initial voltage ratio.
And calculating the ratio of the fifth voltage to ground to the sixth voltage to ground to obtain the initial voltage ratio. The initial voltage ratio can be used for obtaining an equation between the voltage and the resistance with the corresponding insulation resistance value and the reference resistance value, and the equation is used for calculating the insulation resistance with the equation obtained by the next detection.
The equation for the initial voltage ratio may be equation (5):
V5/V6＝(Rp//R1)/(Rn//R2) (5)
V5is a fifth target voltage, i.e. the voltage across the first insulation resistor when the first insulation resistor is connected in parallel with the first reference resistor, V6The second target voltage is the voltage across the second insulation resistor when the second insulation resistor is connected in parallel with the second reference resistor. RpIs the resistance value, R, of the first insulation resistornIs the resistance value, R, of the second insulation resistor1Is the resistance value of the first reference resistor, R2Is the resistance value of the second reference resistor, Rp//R1Is the resistance value, R, of the first insulation resistor and the first reference resistor in paralleln//R2The resistance value of the second insulation resistor and the second reference resistor in parallel is shown.
Further, the calculation of the insulation resistance may be performed by combining the initial voltage ratio obtained by the first detection and the target voltage ratio obtained by the second detection.
If the target voltage ratio updated by the last detection is not available, the method further comprises the following steps:
b1: judging whether an initial voltage ratio exists; and if the initial voltage ratio exists, determining the target voltage ratio detected this time as a first voltage ratio or a second voltage ratio.
It should be noted that, in the embodiment of the present application, a specific kind of the second detection target voltage ratio is not limited, and may be the first voltage ratio or the second voltage ratio.
B2: if the target voltage ratio detected this time is the first voltage ratio, after the first voltage ratio is obtained, the resistance value of the first insulation resistor and the resistance value of the second insulation resistor are obtained through calculation according to the first voltage ratio and the initial voltage ratio.
If the target voltage ratio detected this time is the first voltage ratio, the resistance value of the insulation resistor can be calculated according to the equation corresponding to the first voltage ratio and the equation corresponding to the initial voltage ratio. Namely, the resistance value of the insulation resistor is calculated by using the formula (1) and the formula (3).
B3: if the voltage ratio detected this time is a second voltage ratio, after the second voltage ratio is obtained, the resistance value of the first insulation resistor and the resistance value of the second insulation resistor are calculated according to the second voltage ratio and the initial voltage ratio.
And if the target voltage ratio detected this time is the second voltage ratio, calculating the resistance value of the insulation resistor according to an equation corresponding to the second voltage ratio and an equation corresponding to the initial voltage ratio. Namely, the resistance value of the insulation resistor is calculated by using the formula (2) and the formula (3).
In the embodiment of the application, the initial voltage ratio is obtained through the first detection, and the resistance value of the insulation resistor is calculated by using the initial voltage ratio and the target voltage ratio obtained through the second detection, so that the calculation speed of the insulation resistor is accelerated.
Based on the method for detecting the insulation resistance provided by the above method embodiment, the embodiment of the present application further provides a device for detecting the insulation resistance, and the device for detecting the insulation resistance will be described below with reference to the accompanying drawings.
First, the insulation resistor includes a first insulation resistor and a second insulation resistor; the first end of the power supply is connected with the first end of the first insulation resistor, and the second end of the first insulation resistor is connected with the second end of the power supply through the second insulation resistor; the series branch circuit of the first switch and the first reference resistor is connected in parallel at two ends of the first insulation resistor; the first floating capacitor is connected in parallel with two ends of the first insulation resistor; the second switch and a series branch of a second reference resistor are connected in parallel at two ends of the second insulation resistor; the second floating capacitor is connected in parallel with two ends of the second insulation resistor; and the common end of the first insulation resistor and the second insulation resistor is grounded.
Referring to fig. 6, the drawing is a schematic structural diagram of an insulation resistance detection apparatus according to an embodiment of the present application. As shown in fig. 6, the insulation resistance detection device includes:
a ratio determining unit 601, configured to determine a target voltage ratio to be updated in the current detection;
a switch determining unit 602, configured to determine a target off switch according to a target voltage ratio to be updated, and determine switches other than the target off switch as target on switches; the target closing switch is the first switch or the second switch;
the acquisition unit 603 is used for controlling the target closing switch to be closed, controlling the target opening switch to be disconnected and acquiring a first target voltage; the first target voltage is the voltage at two ends of a first insulation resistor when the first insulation resistor is connected with the first reference resistor in parallel or the voltage at two ends of a second insulation resistor when the second insulation resistor is connected with the second reference resistor in parallel;
a first calculating unit 604, configured to calculate a second target voltage according to the first target voltage;
a second calculating unit 605, configured to calculate a ratio of the first target voltage to the second target voltage to obtain a target voltage ratio;
a third calculating unit 606, configured to calculate a resistance value of the first insulation resistor and a resistance value of the second insulation resistor according to the target voltage ratio, the unrefreshed voltage ratio, the resistance value of the first reference resistor, and the resistance value of the second reference resistor; the non-updated voltage ratio is the target voltage ratio updated by the last detection.
The embodiment of the present application further provides a detection device for insulation resistance, including: a processor, a memory, a system bus;
the processor and the memory are connected through the system bus;
the memory is for storing one or more programs, the one or more programs including instructions, which when executed by the processor, cause the processor to perform the method of any of the above.
An embodiment of the present application further provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the instructions are executed on a terminal device, the terminal device is caused to execute any one of the methods described above.
It should be noted that, in the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. For the system or the device disclosed by the embodiment, the description is simple because the system or the device corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description.
It should be understood that in the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" for describing an association relationship of associated objects, indicating that there may be three relationships, e.g., "a and/or B" may indicate: only A, only B and both A and B are present, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single item(s) or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The detection method of the insulation resistance is characterized in that the insulation resistance comprises a first insulation resistance and a second insulation resistance; the first end of the power supply is connected with the first end of the first insulation resistor, and the second end of the first insulation resistor is connected with the second end of the power supply through the second insulation resistor; the series branch circuit of the first switch and the first reference resistor is connected in parallel at two ends of the first insulation resistor; the first floating capacitor is connected in parallel with two ends of the first insulation resistor; the second switch and a series branch of a second reference resistor are connected in parallel at two ends of the second insulation resistor; the second floating capacitor is connected in parallel with two ends of the second insulation resistor; the common end of the first insulation resistor and the second insulation resistor is grounded;
the detection method comprises the following steps:
determining a target voltage ratio to be updated in the current detection;
determining a target closing switch according to the target voltage ratio to be updated, and determining switches except the target closing switch as target opening switches; the target closing switch is the first switch or the second switch;
controlling the target closing switch to be closed, controlling the target opening switch to be disconnected, and collecting a first target voltage; the first target voltage is a voltage across the first insulation resistor when the first insulation resistor is connected in parallel with the first reference resistor or a voltage across the second insulation resistor when the second insulation resistor is connected in parallel with the second reference resistor;
calculating to obtain a second target voltage according to the first target voltage;
calculating the ratio of the first target voltage to the second target voltage to obtain a target voltage ratio;
calculating to obtain the resistance value of the first insulation resistor and the resistance value of the second insulation resistor according to the target voltage ratio, the unrefreshed voltage ratio, the resistance value of the first reference resistor and the resistance value of the second reference resistor; the non-updated voltage ratio is the target voltage ratio updated by the last detection.
2. The method of claim 1, wherein the determining the target voltage ratio to be updated for the current test comprises:
acquiring a target voltage ratio updated by the last detection;
if the updated target voltage ratio is detected to be the second voltage ratio last time, the updated target voltage ratio is the first voltage ratio;
wherein the first voltage ratio is a ratio of a first voltage to ground voltage and a second voltage to ground voltage; the first voltage-to-ground is a voltage across the first insulation resistor when the first insulation resistor is connected in parallel with the first reference resistor, and the second voltage-to-ground is a voltage across the second insulation resistor;
the second voltage ratio is a ratio of a third voltage to ground, which is a voltage across the first insulation resistor, and a fourth voltage to ground, which is a voltage across the second insulation resistor when the second insulation resistor is connected in parallel with the second reference resistor;
if the updated target voltage ratio is detected to be the first voltage ratio last time, the updated target voltage ratio is the second voltage ratio;
determining a target closing switch according to a target voltage ratio to be updated, and determining switches except the target closing switch as target opening switches, wherein the method comprises the following steps:
if the target voltage ratio is a first voltage ratio, determining the first switch as a target closing switch according to the first voltage ratio, and determining the second switch as a target opening switch;
and if the target voltage ratio is a second voltage ratio, determining the second switch as the target closing switch according to the second voltage ratio, and determining the first switch as a target opening switch.
3. The method of claim 2, wherein if the target voltage ratio updated by the last detection is not available, the method further comprises:
judging whether an initial voltage ratio exists;
if the initial voltage ratio does not exist, controlling the first switch and the second switch to be closed;
collecting a fifth voltage to ground and a sixth voltage to ground;
the fifth voltage to ground is a voltage across the first insulation resistor when the first insulation resistor is connected in parallel with the first reference resistor; the sixth voltage to ground is a voltage across the second insulation resistor when the second insulation resistor is connected in parallel with the second reference resistor;
and calculating the ratio of the fifth voltage to ground to the sixth voltage to ground to obtain an initial voltage ratio.
4. The method of claim 3, wherein if the target voltage ratio updated by the last detection is not available, the method further comprises:
judging whether an initial voltage ratio exists;
if the initial voltage ratio exists, determining the target voltage ratio detected this time as a first voltage ratio or a second voltage ratio;
if the target voltage ratio detected this time is a first voltage ratio, after the first voltage ratio is obtained, calculating according to the first voltage ratio and the initial voltage ratio to obtain the resistance value of the first insulation resistor and the resistance value of the second insulation resistor;
if the voltage ratio detected this time is a second voltage ratio, after the second voltage ratio is obtained, the resistance value of the first insulation resistor and the resistance value of the second insulation resistor are calculated according to the second voltage ratio and the initial voltage ratio.
5. The method of claim 1, wherein controlling the target-off switch to close and the target-on switch to open, collecting a first target voltage comprises:
controlling the target closing switch to be closed, controlling the target opening switch to be opened, and collecting first judgment voltage according to a time sequence at a first preset collection interval;
and calculating a difference value between the first judgment voltages, and acquiring a first target voltage when the difference value between the first judgment voltages is smaller than a first preset voltage difference value threshold value.
6. The method of claim 5, wherein calculating the difference between the first determination voltages, and acquiring a first target voltage when the difference between the first determination voltages is smaller than a first preset voltage difference threshold comprises:
calculating a difference value between the first judgment voltages, and collecting a first preset number of first preprocessing voltages when the difference value between the first judgment voltages is smaller than a first preset voltage difference value threshold; the first preset number is an odd number;
and sequencing the first preprocessing voltages of the first preset number according to the voltage value, and taking the first preprocessing voltages at the middle position as first target voltages.
7. The method of claim 1, wherein calculating a second target voltage from the first target voltage comprises:
acquiring a power supply voltage of the power supply;
and calculating the difference value between the power supply voltage and the first target voltage to obtain a second target voltage.
8. The detection device of the insulation resistance is characterized in that the insulation resistance comprises a first insulation resistance and a second insulation resistance; the first end of the power supply is connected with the first end of the first insulation resistor, and the second end of the first insulation resistor is connected with the second end of the power supply through the second insulation resistor; the series branch circuit of the first switch and the first reference resistor is connected in parallel at two ends of the first insulation resistor; the first floating capacitor is connected in parallel with two ends of the first insulation resistor; the second switch and a series branch of a second reference resistor are connected in parallel at two ends of the second insulation resistor; the second floating capacitor is connected in parallel with two ends of the second insulation resistor; the common end of the first insulation resistor and the second insulation resistor is grounded;
the detection device includes:
the ratio determining unit is used for determining a target voltage ratio to be updated in the current detection;
the switch determining unit is used for determining a target closing switch according to the target voltage ratio to be updated and determining switches except the target closing switch as target opening switches; the target closing switch is the first switch or the second switch;
the acquisition unit is used for controlling the target closing switch to be closed, controlling the target opening switch to be disconnected and acquiring a first target voltage; the first target voltage is a voltage across the first insulation resistor when the first insulation resistor is connected in parallel with the first reference resistor or a voltage across the second insulation resistor when the second insulation resistor is connected in parallel with the second reference resistor;
the first calculating unit is used for calculating to obtain a second target voltage according to the first target voltage;
the second calculating unit is used for calculating the ratio of the first target voltage to the second target voltage to obtain a target voltage ratio;
the third calculating unit is used for calculating the resistance value of the first insulating resistor and the resistance value of the second insulating resistor according to the target voltage ratio, the unrefreshed voltage ratio, the resistance value of the first reference resistor and the resistance value of the second reference resistor; the non-updated voltage ratio is the target voltage ratio updated by the last detection.
9. An insulation resistance detection apparatus, comprising: a processor, a memory, a system bus;
the processor and the memory are connected through the system bus;
the memory is to store one or more programs, the one or more programs comprising instructions, which when executed by the processor, cause the processor to perform the method of any of claims 1-7.
10. A computer-readable storage medium having stored therein instructions that, when executed on a terminal device, cause the terminal device to perform the method of any one of claims 1-7.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114740266A (en) * | 2022-04-08 | 2022-07-12 | 东方电气集团东方电机有限公司 | Insulation monitoring method, insulation monitoring device, electronic equipment and storage medium |
| EP4057012A1 (en) * | 2021-03-12 | 2022-09-14 | Delta Electronics, Inc. | Insulation resistance detection system for electric vehicle and insulation resistance detection method thereof |
Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4408157A (en) * | 1981-05-04 | 1983-10-04 | Associated Research, Inc. | Resistance measuring arrangement |
| US20040189330A1 (en) * | 2003-01-09 | 2004-09-30 | Ulrich Herb | Circuit and method for detecting insulation faults |
| JP2013148401A (en) * | 2012-01-18 | 2013-08-01 | Hikari Shoko Kk | Insulation monitoring apparatus and monitoring method of direct current non-grounded circuit |
| CN103389436A (en) * | 2013-07-24 | 2013-11-13 | 中达电通股份有限公司 | Switch insulation monitoring method and switch insulation monitoring system for direct-current power supply system |
| CN103869179A (en) * | 2012-12-14 | 2014-06-18 | 比亚迪股份有限公司 | Insulation monitoring method for direct current system |
| CN104076207A (en) * | 2014-06-26 | 2014-10-01 | 天津市松正电动汽车技术股份有限公司 | Electric vehicle insulation detecting circuit |
| KR20150026334A (en) * | 2013-09-02 | 2015-03-11 | 엘에스산전 주식회사 | Photovoltaic inverter |
| KR20160039987A (en) * | 2014-10-02 | 2016-04-12 | 주식회사 엘지화학 | Isolation resistance measurement apparatus that can rapidly measure isolation resistance |
| CN105911352A (en) * | 2016-04-13 | 2016-08-31 | 北京新能源汽车股份有限公司 | Tester for measuring insulation resistance of power battery |
| CN106291112A (en) * | 2016-10-27 | 2017-01-04 | 宁德时代新能源科技股份有限公司 | Insulation resistance detection circuit and method |
| CN107005065A (en) * | 2014-10-02 | 2017-08-01 | 罗伯特·博世有限公司 | With the battery pack system for being configured to supply the battery pack of electric energy and measurement apparatus at least one insulaion resistance for measuring battery pack to high-voltage fence |
| CN107407713A (en) * | 2015-11-16 | 2017-11-28 | 株式会社Lg 化学 | Insulation measurement system and equipment |
| CN107422185A (en) * | 2017-03-29 | 2017-12-01 | 江门市甜的电器有限公司 | A kind of insulation resistance of DC system observation circuit, system and method |
| US20180041122A1 (en) * | 2016-08-04 | 2018-02-08 | Delta Electronics, Inc. | Insulation detecting circuit, power converting device and insulation impedance value detecting method |
| CN109633276A (en) * | 2018-12-28 | 2019-04-16 | 蜂巢能源科技有限公司 | Insulation resistance detection method and device based on full-bridge insulation detecting circuit |
| CN109884391A (en) * | 2017-12-04 | 2019-06-14 | 宝沃汽车（中国）有限公司 | Battery pack insulation resistance detection method, device and battery management system |
| CN110568372A (en) * | 2019-09-27 | 2019-12-13 | 安徽鸿创新能源动力有限公司 | Detection circuit and method for total voltage and insulation resistance of battery pack |
| CN110869782A (en) * | 2017-12-12 | 2020-03-06 | 株式会社Lg化学 | Apparatus and method for diagnosing negative electrode contactor of battery pack |
-
2020
- 2020-08-05 CN CN202010777242.7A patent/CN111965428B/en active Active
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4408157A (en) * | 1981-05-04 | 1983-10-04 | Associated Research, Inc. | Resistance measuring arrangement |
| US20040189330A1 (en) * | 2003-01-09 | 2004-09-30 | Ulrich Herb | Circuit and method for detecting insulation faults |
| JP2013148401A (en) * | 2012-01-18 | 2013-08-01 | Hikari Shoko Kk | Insulation monitoring apparatus and monitoring method of direct current non-grounded circuit |
| CN103869179A (en) * | 2012-12-14 | 2014-06-18 | 比亚迪股份有限公司 | Insulation monitoring method for direct current system |
| CN103389436A (en) * | 2013-07-24 | 2013-11-13 | 中达电通股份有限公司 | Switch insulation monitoring method and switch insulation monitoring system for direct-current power supply system |
| KR20150026334A (en) * | 2013-09-02 | 2015-03-11 | 엘에스산전 주식회사 | Photovoltaic inverter |
| CN104076207A (en) * | 2014-06-26 | 2014-10-01 | 天津市松正电动汽车技术股份有限公司 | Electric vehicle insulation detecting circuit |
| CN107005065A (en) * | 2014-10-02 | 2017-08-01 | 罗伯特·博世有限公司 | With the battery pack system for being configured to supply the battery pack of electric energy and measurement apparatus at least one insulaion resistance for measuring battery pack to high-voltage fence |
| KR20160039987A (en) * | 2014-10-02 | 2016-04-12 | 주식회사 엘지화학 | Isolation resistance measurement apparatus that can rapidly measure isolation resistance |
| CN107407713A (en) * | 2015-11-16 | 2017-11-28 | 株式会社Lg 化学 | Insulation measurement system and equipment |
| CN105911352A (en) * | 2016-04-13 | 2016-08-31 | 北京新能源汽车股份有限公司 | Tester for measuring insulation resistance of power battery |
| US20180041122A1 (en) * | 2016-08-04 | 2018-02-08 | Delta Electronics, Inc. | Insulation detecting circuit, power converting device and insulation impedance value detecting method |
| CN106291112A (en) * | 2016-10-27 | 2017-01-04 | 宁德时代新能源科技股份有限公司 | Insulation resistance detection circuit and method |
| CN107422185A (en) * | 2017-03-29 | 2017-12-01 | 江门市甜的电器有限公司 | A kind of insulation resistance of DC system observation circuit, system and method |
| CN109884391A (en) * | 2017-12-04 | 2019-06-14 | 宝沃汽车（中国）有限公司 | Battery pack insulation resistance detection method, device and battery management system |
| CN110869782A (en) * | 2017-12-12 | 2020-03-06 | 株式会社Lg化学 | Apparatus and method for diagnosing negative electrode contactor of battery pack |
| CN109633276A (en) * | 2018-12-28 | 2019-04-16 | 蜂巢能源科技有限公司 | Insulation resistance detection method and device based on full-bridge insulation detecting circuit |
| CN110568372A (en) * | 2019-09-27 | 2019-12-13 | 安徽鸿创新能源动力有限公司 | Detection circuit and method for total voltage and insulation resistance of battery pack |
Non-Patent Citations (1)
| Title |
|---|
| 张宝生: "直流系统在线绝缘检测装置的研制", 《中国优秀博硕士学位论文全文数据库（硕士） 工程科技II辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4057012A1 (en) * | 2021-03-12 | 2022-09-14 | Delta Electronics, Inc. | Insulation resistance detection system for electric vehicle and insulation resistance detection method thereof |
| CN114740266A (en) * | 2022-04-08 | 2022-07-12 | 东方电气集团东方电机有限公司 | Insulation monitoring method, insulation monitoring device, electronic equipment and storage medium |
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|---|---|
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