CN110221126A - Insulation impedance detection system and detection method - Google Patents
Insulation impedance detection system and detection method Download PDFInfo
- Publication number
- CN110221126A CN110221126A CN201810171897.2A CN201810171897A CN110221126A CN 110221126 A CN110221126 A CN 110221126A CN 201810171897 A CN201810171897 A CN 201810171897A CN 110221126 A CN110221126 A CN 110221126A
- Authority
- CN
- China
- Prior art keywords
- value
- insulation impedance
- voltage
- capacitor
- detection system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- 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
Abstract
The present invention provides a kind of insulation impedance detection system and detection methods, the insulation impedance detection system includes master controller and sample circuit, wherein: the master controller exports square wave to the sample circuit, the sample circuit connects high-voltage battery system, the master controller samples the voltage of the sample circuit, obtains the value of the insulation impedance of the high-voltage battery system；The sample circuit includes the first transistor, first resistor and first capacitor, in the moment of the square wave failing edge, the master controller carries out first way sampling to the voltage of the first resistor and the first capacitor tie point, the first sampled value is obtained, and calculates the value of the insulation impedance according to the first sampled value.
Description
Technical field
The present invention relates to automobile batteries technical field, in particular to a kind of insulation impedance detection system and detection method.
Background technique
Vehicle equipped with high-voltage battery system just starts that vehicular engine is replaced to provide the power of vehicle operation, high
Piezoelectricity cell system is powered on safely by high-voltage relay or lower electricity, while high-voltage battery system is driven by DC/AC converter
Dynamic alternating current generator work, high-voltage battery system can also convert the power supply for becoming low-pressure system, therefore high pressure by DC/DC
The safe condition of battery system needs to monitor in real time, the insulation resistance especially between the wiring of high-voltage battery system and vehicle body ground
It is anti-.When insulation impedance is too low, the management system of high-tension battery need to limit power output or cutting power output, otherwise due to
The insulation impedance of high-voltage battery system is too low to occur the personal accidents such as electric shock and insulation impedance is too low brings high-voltage electricity purling
Entering low-pressure system causes the latter's failure that vehicle is caused to cast anchor, or fever is caused to increase to generate the danger of vehicle burning.
When high-voltage battery system works normally, the anode and cathode of the bus of high-voltage battery system are with corresponding to vehicle body respective
There is corresponding resistance and hold resistance, is high-tension battery system by the insulation impedance that the coupled modes of capacitor (capacitor equivalent object) detect
The concentrated expression of system to vehicle body impedance, by the comprehensive impedance threshold value comparison with setting, to judge vehicle high-voltage system over the ground
Whether impedance is in safe range, and does not need to take appropriate measures in safe range.
Calculation method is sampled based on existing insulation impedance, obtaining accurate insulation impedance RL needs accurate coupling
Capacitor's capacity is closed, high-precision, the coupled capacitor cost of high voltage are very high, and in addition volume is larger；Simultaneously because calculation formula is complicated,
It obtains accurate insulation impedance and needs to occupy more master controller resources, also increase software complexity and risk.
Summary of the invention
The purpose of the present invention is to provide a kind of insulation impedance detection system and detection methods, to solve existing insulation resistance
Anti- detection system hardware cost is high, calculates the big problem of complicated occupancy resource.
In order to solve the above technical problems, the present invention provides a kind of insulation impedance detection system, the insulation impedance detection system
System includes master controller and sample circuit, in which:
The master controller exports square wave to the sample circuit, and the sample circuit connects high-voltage battery system, described
Master controller samples the voltage of the sample circuit, obtains the value of the insulation impedance of the high-voltage battery system；
The sample circuit includes the first transistor, first resistor and first capacitor, in the moment of the square wave failing edge,
The master controller carries out first way sampling to the voltage of the first resistor and the first capacitor tie point, obtains the
One sampled value, and calculate according to the first sampled value the value of the insulation impedance.
Optionally, in the insulation impedance detection system, the sampling of the first way includes:
Within the time after occurring 50 milliseconds to the square wave failing edge before the square wave failing edge occurs 50 milliseconds, carry out
100 samplings, and the successively difference of more each sampled value and a preceding sampled value select the maximum primary sampling of difference, and
Using the maximum value once sampled of difference as the first sampled value.
Optionally, in the insulation impedance detection system, the first capacitor be coupled capacitor, capacitor equivalent object or
The splicing capacitor that the printed circuit board stacking effect of the insulation impedance detection system generates.
Optionally, in the insulation impedance detection system, the first transistor is N-channel insulation field effect transistor
Pipe, the grid of the first transistor connect the master controller, the source electrode ground connection of the first transistor, the first crystal
The drain electrode of pipe connects the first resistor and first capacitor.
Optionally, in the insulation impedance detection system, one end of the first resistor connects the first capacitor,
The other end of the first resistor connects the first DC power supply, and the voltage magnitude of first DC power supply is equal to the square wave
Amplitude.
Optionally, in the insulation impedance detection system, the value of the insulation impedance is calculated according to the first sampled value
Include:
RL=R1*Va/ (E-Va)
Wherein: Va is first sampled value；RL is the insulation impedance value；R1 is the resistance value of the first resistor；E is
The voltage magnitude of first DC power supply.
Optionally, in the insulation impedance detection system, the master controller includes square wave output circuit and first
Analog to digital conversion circuit, the sample circuit further include voltage follower, second resistance and the second capacitor, in which:
The square wave output circuit connects the grid of the first transistor, described in the first analog to digital conversion circuit connection
The output end of voltage follower；
One end of the second resistance connects the first resistor and first capacitor, the other end connect second capacitor and
The input terminal of voltage follower；The other end connection vehicle body of second capacitor.
Optionally, in the insulation impedance detection system, the frequency of the square wave is 1~100HZ, the square wave
Amplitude is 0V~12V.
Optionally, in the insulation impedance detection system, the master controller further includes the second analog to digital conversion circuit,
Second analog to digital conversion circuit connects the first resistor and the first capacitor, and to the first resistor and first capacitor
Junction voltage carry out second way sampling, obtain the second sampled value and third sampled value, and according to the second sampled value
Judge whether the sample circuit breaks down with third sampled value.
Optionally, in the insulation impedance detection system, the second way sampling includes:
It is sampled before the voltage of square wave output completes failing edge, obtains the second sampled value；
It is sampled before the voltage of square wave output completes rising edge, obtains third sampled value.
Optionally, described when second sampled value is less than first threshold in the insulation impedance detection system
The failure of sample circuit is the first resistor open circuit or first capacitor short circuit or the first crystal tube short circuit；When described
When three sampled values are greater than second threshold, the failure of the sample circuit is the first resistor short circuit or the first transistor
Open circuit.
The present invention also provides a kind of detection methods based on above-mentioned insulation impedance detection system, comprising:
Step 1: the insulation impedance detection system powers on；
Judge whether the sample circuit breaks down, if the sample circuit breaks down, height described in No starting
Piezoelectricity cell system calculates the value of the insulation impedance if sample circuit is without failure；
Step 2: judge whether the value of the insulation impedance is less than third threshold value according to the value of the insulation impedance；
If the value of the insulation impedance is greater than third threshold value, start the high-voltage battery system；
If the value of the insulation impedance is less than third threshold value, judge the value of the insulation impedance whether less than the 4th threshold
Value, and issue warning；
If the value of the insulation impedance is greater than the 4th threshold value, start the high-voltage battery system；
If the value of the insulation impedance is less than the 4th threshold value, high-voltage battery system described in No starting；
Step 3: after high-voltage battery system starting, judge whether the sample circuit breaks down, if described adopt
Sample circuit breaks down, then limits the output power of the high-voltage battery system, if sample circuit is without failure, calculate institute
State the value of insulation impedance；
Step 4: judge whether the value of the insulation impedance is less than third threshold value according to the value of the insulation impedance；
If the value of the insulation impedance is greater than third threshold value, it is back to step 3；
If the value of the insulation impedance is less than third threshold value, judge the value of the insulation impedance whether less than the 4th threshold
Value, and issue warning；
If the value of the insulation impedance is greater than the 4th threshold value, the output power of the high-voltage battery system is limited；
If the value of the insulation impedance stops the high-voltage battery system less than the 4th threshold value.
Optionally, in the insulation impedance detection method, the third threshold value is greater than the high-voltage battery system most
Big operating voltage value is multiplied by 500 ohm；4th threshold value is greater than the high-voltage battery system maximum working voltage value multiplied by 100
Ohm.
In insulation impedance detection system provided by the invention and detection method, pass through the wink in the square wave failing edge
Between, the master controller to the voltage of the first resistor and the first capacitor tie point (hereinafter referred to as " sampled point ") into
The sampling of row first way, obtains the first sampled value, acquires sampled point and adopt in the voltage value of t=0 in square wave failing edge moment
Sampling point voltage is rising edge, and first capacitor is equivalent to short circuit at this time, therefore can pass through the constants such as the first sampled value, first resistor
Insulation impedance is found out, complicated calculating is carried out without using master controller.
Detailed description of the invention
Fig. 1 is one embodiment of the invention insulation impedance detecting system schematic diagram；
Fig. 2 is one embodiment of the invention insulation impedance detection system sampled point waveform diagram；
Fig. 3 is one embodiment of the invention insulation impedance detection system first capacitor (splicing capacitor) schematic diagram；
Fig. 4 is another embodiment of the present invention insulation impedance detection method flow diagram；
It is as shown in the figure: 10- sample circuit；12- the first transistor；13- filter circuit；14- voltage follower；20- master control
Device processed；21- square wave output circuit；The first analog to digital conversion circuit of 22-；The second analog to digital conversion circuit of 23-；3- high-voltage load；4- is opened
It closes；5- high-tension battery.
Specific embodiment
Below in conjunction with the drawings and specific embodiments to insulation impedance detection system proposed by the present invention and detection method make into
One step is described in detail.According to following explanation and claims, advantages and features of the invention will be become apparent from.It should be noted that
Attached drawing is all made of very simplified form and using non-accurate ratio, only to convenient, lucidly aid illustration is of the invention
The purpose of embodiment.
Core of the invention thought is to provide a kind of insulation impedance detection system and detection method, with solve it is existing absolutely
Edge impedance detection system hardware is at high cost, calculates the big problem of complicated occupancy resource.
To realize above-mentioned thought, the present invention provides a kind of insulation impedance detection system and detection method, the insulation resistance
Anti- detection system includes master controller and sample circuit, in which: the master controller exports square wave to the sample circuit, described
Sample circuit connects high-voltage battery system, and the master controller samples the voltage of the sample circuit, obtains the height
The value of the insulation impedance of piezoelectricity cell system；The sample circuit includes the first transistor, first resistor and first capacitor, described
The moment of square wave failing edge, the master controller carry out first to the voltage of the first resistor and the first capacitor tie point
Kind mode samples, and obtains the first sampled value, and the value of the insulation impedance is calculated according to the first sampled value.
<embodiment one>
The present embodiment provides a kind of insulation impedance detection systems, as shown in Figures 1 to 3, the insulation impedance detection system packet
Include master controller 20 and sample circuit 10, in which: the master controller 20 exports square wave, the sampling to the sample circuit 10
Circuit 10 connects high-voltage battery system, and high-voltage battery system includes high-voltage load 3, switch 4 and high-tension battery 5, and high-tension battery 5 is given
High-voltage load 3 is powered, and the master controller 20 samples the voltage of the sample circuit 10, obtains the high-tension battery system
The value of the insulation impedance of system；The insulation impedance refers to the impedance between high-voltage battery system and vehicle body ground, such as high-tension battery
Impedance RL1 between the anode and vehicle body ground of system and the impedance RL2, RL1 between the cathode and vehicle body ground of high-voltage battery system
It is RL with the RL2 equivalent impedance formed after in parallel.
The sample circuit 10 includes the first transistor 12, first resistor R1 and first capacitor C1, is declined in the square wave
The moment on edge, the master controller 20 is to the first resistor R1 and the first capacitor C1 tie point (hereinafter referred to as " sampling
Point A ") voltage carry out first way sampling, obtain the first sampled value, and the insulation impedance is calculated according to the first sampled value
Value.
Further, in the insulation impedance detection system, one end connection described first of the first resistor R1
The other end of capacitor C1, the first resistor R1 connect the first DC power supply E, the voltage magnitude etc. of the first DC power supply E
In the amplitude of the square wave.The first capacitor C1 is coupled capacitor, capacitor equivalent object or the insulation impedance detection system
The splicing capacitor that effect generates is laminated in printed circuit board.
As shown in figure 3, structure shown in Fig. 3 is that coupled capacitor equivalent splices capacitor (stitching capacitor)
Design fundamentals, wherein corresponding capacitance can be calculated according to following formula:
Wherein: C is the capacitance of first capacitor, and A is the insulating layer area of the printed circuit board of insulation impedance detection system, d
For the thickness of insulating layer of the printed circuit board of insulation impedance detection system, ε 0 is 8.854 × 10- of dielectric constant of free space
12F/m, ε r are the relative dielectric constant of the insulating materials of the printed circuit board of insulation impedance detection system, the phase in the present embodiment
It is about 4.5 to dielectric constant.
As shown in figure 3, A=w*l, wherein w and l is the ruler of low pressure PCB copper foil layer Yu high pressure PCB copper foil layer overlapping part
It is very little.
The main advantage of this structure is to climb electricity in the gap that capacitor results from below high and low voltage isolation device in order to meet
The requirement of distance, electric clearance and capacitor's capacity generally uses 4 layers or 4 layers or more of PCB design, since structure designs letter
It is single, it is very suitable to only need the board design of basic insulation.
As shown in Figure 1, the first transistor 12 is N-channel insulation field effect in the insulation impedance detection system
Transistor is answered, the grid of the first transistor 12 connects the master controller 20, the source electrode ground connection of the first transistor 12
(for the ground of the insulation impedance detection system, rather than vehicle body), the drain electrode connection described first of the first transistor 12
Resistance R1 and first capacitor C1.
Specifically, may infer that according to the system circuit diagram of Fig. 1:
Wherein: C is the capacitance of first capacitor, and RL is the insulation impedance value；R1 is the resistance value of the first resistor；E is
The voltage magnitude of first DC power supply, i are the electric current from R1 to RL；It is described in the insulation impedance detection system
The frequency of square wave is 1~100HZ, and the amplitude of the square wave is 0V~12V.The sampling of the first way includes: such as Fig. 2 institute
Show, in the time t1 after occurring 50 milliseconds to the square wave failing edge before the square wave failing edge occurs 50 milliseconds, carries out 100
Secondary sampling, and the successively difference of more each sampled value and a preceding sampled value select the maximum primary sampling of difference, and will be poor
It is worth the maximum value once sampled as the first sampled value.I.e. in formula (1), in the case where t=0, (R1+RL) i0=E, Va=
RL*i0, wherein i0 is the current value at t=0 moment, and Va is first sampled value；Then by transformation, according to the first sampled value
The value for calculating the insulation impedance includes:
RL=R1*Va/ (E-Va)
Wherein: RL is the insulation impedance value；R1 is the resistance value of the first resistor；E is first DC power supply
Voltage magnitude, above is given value in addition to RL, and the calculating of RL is not related to exponential function and timing.
The master controller 20 includes square wave output circuit 21 and the first analog to digital conversion circuit 22, and the sample circuit 10 is also
Including voltage follower 14, second resistance R2 and the second capacitor C2, in which: it is brilliant that the square wave output circuit 21 connects described first
The grid of body pipe 12, first analog to digital conversion circuit 22 connect the output end of the voltage follower 14；The second resistance
One end of R2 connects the first resistor R1 and first capacitor C1, and the other end connects the second capacitor C2 and voltage follower 14
Input terminal；The other end connection vehicle body of the second capacitor C2.Second resistance R2 and the second capacitor C2 constitute filtered electrical
Road 13.
Further, in the insulation impedance detection system, the master controller 20 further includes the second analog-to-digital conversion
Circuit 23, second analog to digital conversion circuit 23 connect the first resistor R1 and the first capacitor C1, and to described first
The voltage of the junction of resistance R1 and first capacitor C1 carries out second way sampling, obtains the second sampled value and third sampling
Value, and judge whether the sample circuit 10 breaks down according to the second sampled value and third sampled value.
Specifically, the second way sampling includes: to be adopted before the voltage of square wave output completes failing edge
Sample obtains the second sampled value；It is sampled before the voltage of square wave output completes rising edge, obtains third sampled value.When
When second sampled value is less than first threshold, the failure of the sample circuit is the first resistor or first capacitor or described
The first transistor occur Problem of Failure (such as first resistor open circuit or first capacitor short circuit or the first transistor it is short
Road)；When the third sampled value is greater than second threshold, the failure of the sample circuit is the first resistor or first crystal
There is Problem of Failure (such as first resistor short circuit or the first transistor open circuit) in pipe.
In insulation impedance detection system provided by the invention and detection method, pass through the wink in the square wave failing edge
Between, the master controller to the voltage of the first resistor and the first capacitor tie point (hereinafter referred to as " sampled point ") into
The sampling of row first way, obtains the first sampled value, acquires sampled point and adopt in the voltage value of t=0 in square wave failing edge moment
Sampling point voltage is rising edge, and first capacitor is equivalent to short circuit at this time, therefore can pass through the constants such as the first sampled value, first resistor
Insulation impedance is found out, complicated timing is calculated without using master controller.
The first transistor 12 in circuit is accurate sampling square wave low level virtual value design, using rich inside controller
Remaining power drive NMOS tube realizes driving, does not increase extra cost.
Vehicle high-voltage battery system insulation impedance detection and detection circuit diagnostic function may be implemented in the present embodiment, in real time
Insulation impedance is detected whether in normal range (NR), the design that coupled capacitor is used for by that will splice capacitor reduces hardware cost, together
When splicing capacitor comparison coupled capacitor material object have the characteristics that high reliablity, improve the reliability of insulation detecting circuit；It uses
Coupled capacitor material object is also able to achieve same detection effect, and coupled capacitor excessively pays close attention to the accurate of capacitance due to not needing at this time
Degree, accordingly can be used cheap product, new design can obtain the double benefit of economy and technology in summary.
To sum up, the various configuration of insulation impedance detection system is described in detail in above-described embodiment, certainly, the present invention
Cited configuration, any to be converted on the basis of configuration provided by the above embodiment in including but not limited to above-mentioned implementation
Content, belong to the range protected of the present invention.It is anti-that those skilled in the art can lift one according to the content of above-described embodiment
Three.
<embodiment two>
The present embodiment provides a kind of detection methods based on the insulation impedance detection system in a upper embodiment, such as Fig. 4 institute
Show, comprising: step 1: the insulation impedance detection system powers on；Judge whether the sample circuit breaks down, if described adopt
Sample circuit breaks down, then high-voltage battery system described in No starting calculates the insulation if sample circuit is without failure
The value of impedance；Step 2: judge whether the value of the insulation impedance is less than third threshold value according to the value of the insulation impedance；If institute
The value for stating insulation impedance is greater than third threshold value, then starts the high-voltage battery system；If the value of the insulation impedance is less than third
Threshold value then judges that the value of the insulation impedance whether less than the 4th threshold value, and issues warning；If the value of the insulation impedance is greater than
4th threshold value then starts the high-voltage battery system；If the value of the insulation impedance is less than the 4th threshold value, described in No starting
High-voltage battery system；Step 3: after high-voltage battery system starting, judging whether the sample circuit breaks down, if
The sample circuit breaks down, then limits the output power of the high-voltage battery system, if sample circuit is without failure,
Calculate the value of the insulation impedance；Step 4: judge whether the value of the insulation impedance is less than according to the value of the insulation impedance
Third threshold value；If the value of the insulation impedance is greater than third threshold value, it is back to step 3；If the value of the insulation impedance is less than
Third threshold value then judges that the value of the insulation impedance whether less than the 4th threshold value, and issues warning；If the value of the insulation impedance
Greater than the 4th threshold value, then the output power of the high-voltage battery system is limited；If the value of the insulation impedance less than the 4th threshold value,
Then stop the high-voltage battery system.
Specifically, the third threshold value is greater than the high-voltage battery system most in the insulation impedance detection method
Big operating voltage value is multiplied by 500 ohm；4th threshold value is greater than the high-voltage battery system maximum working voltage value multiplied by 100
Ohm.
In insulation impedance detection system provided by the invention and detection method, pass through the wink in the square wave failing edge
Between, the master controller to the voltage of the first resistor and the first capacitor tie point (hereinafter referred to as " sampled point ") into
The sampling of row first way, obtains the first sampled value, acquires sampled point and adopt in the voltage value of t=0 in square wave failing edge moment
Sampling point voltage is rising edge, and first capacitor is equivalent to short circuit at this time, therefore can pass through the constants such as the first sampled value, first resistor
Insulation impedance is found out, complicated timing is calculated without using master controller.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For system disclosed in embodiment
For, due to corresponding to the methods disclosed in the examples, so being described relatively simple, related place is referring to method part illustration
?.
Foregoing description is only the description to present pre-ferred embodiments, not to any restriction of the scope of the invention, this hair
Any change, the modification that the those of ordinary skill in bright field does according to the disclosure above content, belong to the protection of claims
Range.
Claims (13)
1. a kind of insulation impedance detection system, which is characterized in that the insulation impedance detection system includes master controller and sampling
Circuit, in which:
The master controller exports square wave to the sample circuit, and the sample circuit connects high-voltage battery system, the master control
Device processed samples the voltage of the sample circuit, obtains the value of the insulation impedance of the high-voltage battery system；
The sample circuit includes the first transistor, first resistor and first capacitor, described in the moment of the square wave failing edge
Master controller carries out first way sampling to the voltage of the first resistor and the first capacitor tie point, obtains first and adopts
Sample value, and calculate according to the first sampled value the value of the insulation impedance.
2. insulation impedance detection system as described in claim 1, which is characterized in that the sampling of the first way includes:
Within the time after occurring 50 milliseconds to the square wave failing edge before the square wave failing edge occurs 50 milliseconds, 100 are carried out
Secondary sampling, and the successively difference of more each sampled value and a preceding sampled value select the maximum primary sampling of difference, and will be poor
It is worth the maximum value once sampled as the first sampled value.
3. insulation impedance detection system as described in claim 1, which is characterized in that the first capacitor is coupled capacitor, electricity
Hold the splicing capacitor of the printed circuit board stacking effect generation of equivalent or the insulation impedance detection system.
4. insulation impedance detection system as described in claim 1, which is characterized in that the first transistor is N-channel insulation
Field effect transistor, the grid of the first transistor connect the master controller, the source electrode ground connection of the first transistor, institute
The drain electrode for stating the first transistor connects the first resistor and first capacitor.
5. insulation impedance detection system as claimed in claim 4, which is characterized in that described in one end connection of the first resistor
The other end of first capacitor, the first resistor connects the first DC power supply, and the voltage magnitude of first DC power supply is equal to
The amplitude of the square wave.
6. insulation impedance detection system as claimed in claim 5, which is characterized in that calculate the insulation according to the first sampled value
The value of impedance includes:
RL=R1*Va/ (E-Va)
Wherein: Va is first sampled value；RL is the insulation impedance value；R1 is the resistance value of the first resistor；E is described
The voltage magnitude of first DC power supply.
7. insulation impedance detection system as claimed in claim 4, which is characterized in that the master controller includes square wave output electricity
Road and the first analog to digital conversion circuit, the sample circuit further include voltage follower, second resistance and the second capacitor, in which:
The square wave output circuit connects the grid of the first transistor, and first analog to digital conversion circuit connects the voltage
The output end of follower；
One end of the second resistance connects the first resistor and first capacitor, and the other end connects second capacitor and voltage
The input terminal of follower；The other end connection vehicle body of second capacitor.
8. insulation impedance detection system as described in claim 1, which is characterized in that the frequency of the square wave is 1~100HZ,
The amplitude of the square wave is 0V~12V.
9. insulation impedance detection system as described in claim 1, which is characterized in that the master controller further includes the second modulus
Conversion circuit, second analog to digital conversion circuit connect the first resistor and the first capacitor, and to the first resistor
Second way sampling is carried out with the voltage of the junction of first capacitor, obtains the second sampled value and third sampled value, and according to
Second sampled value and third sampled value judge whether the sample circuit breaks down.
10. insulation impedance detection system as claimed in claim 9, which is characterized in that the second way, which samples, includes:
It is sampled before the voltage of square wave output completes failing edge, obtains the second sampled value；
It is sampled before the voltage of square wave output completes rising edge, obtains third sampled value.
11. insulation impedance detection system as claimed in claim 10, which is characterized in that when second sampled value is less than first
When threshold value, the failure of the sample circuit is that the first resistor open circuit or first capacitor short circuit or the first transistor are short
Road；When the third sampled value is greater than second threshold, the failure of the sample circuit is the first resistor short circuit or described
The first transistor open circuit.
12. a kind of detection method based on insulation impedance detection system as claimed in claim 9 characterized by comprising
Step 1: the insulation impedance detection system powers on；
Judge whether the sample circuit breaks down, if the sample circuit breaks down, high-voltage electricity described in No starting
Cell system calculates the value of the insulation impedance if sample circuit is without failure；
Step 2: judge whether the value of the insulation impedance is less than third threshold value according to the value of the insulation impedance；
If the value of the insulation impedance is greater than third threshold value, start the high-voltage battery system；
If the value of the insulation impedance be less than third threshold value, judge the value of the insulation impedance whether less than the 4th threshold value, and
Issue warning；
If the value of the insulation impedance is greater than the 4th threshold value, start the high-voltage battery system；
If the value of the insulation impedance is less than the 4th threshold value, high-voltage battery system described in No starting；
Step 3: after high-voltage battery system starting, judge whether the sample circuit breaks down, if the sampling is electric
Road is broken down, then limits the output power of the high-voltage battery system, if sample circuit is without failure, is calculated described exhausted
The value of edge impedance；
Step 4: judge whether the value of the insulation impedance is less than third threshold value according to the value of the insulation impedance；
If the value of the insulation impedance is greater than third threshold value, it is back to step 3；
If the value of the insulation impedance be less than third threshold value, judge the value of the insulation impedance whether less than the 4th threshold value, and
Issue warning；
If the value of the insulation impedance is greater than the 4th threshold value, the output power of the high-voltage battery system is limited；
If the value of the insulation impedance stops the high-voltage battery system less than the 4th threshold value.
13. insulation impedance detection method as claimed in claim 12, which is characterized in that the third threshold value is greater than the high pressure
Battery system maximum working voltage value is multiplied by 500 ohm；4th threshold value is greater than the high-voltage battery system maximum functional electricity
Pressure value is multiplied by 100 ohm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810171897.2A CN110221126B (en) | 2018-03-01 | 2018-03-01 | Insulation impedance detection system and detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810171897.2A CN110221126B (en) | 2018-03-01 | 2018-03-01 | Insulation impedance detection system and detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110221126A true CN110221126A (en) | 2019-09-10 |
| CN110221126B CN110221126B (en) | 2021-07-16 |
Family
ID=67821843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810171897.2A Active CN110221126B (en) | 2018-03-01 | 2018-03-01 | Insulation impedance detection system and detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110221126B (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2462355Y (en) * | 2000-05-30 | 2001-11-28 | 上海自动化仪表股份有限公司 | Micro power loss optical fiber transmitting multiple parameter transducer |
| JP2009162669A (en) * | 2008-01-09 | 2009-07-23 | Yokogawa Electric Corp | Insulation resistance measurement circuit |
| US20100277185A1 (en) * | 2009-05-01 | 2010-11-04 | Spectrum Technologies, Inc. | Soil moisture sensor |
| CN201886117U (en) * | 2010-09-29 | 2011-06-29 | 京滨电子装置研究开发(上海)有限公司 | Insulation detection circuit of electrically-propelled vehicle |
| CN102539917A (en) * | 2010-12-13 | 2012-07-04 | 河北深海电器有限公司 | Measurer for insulation resistance of direct-current high-voltage system for vehicle and method |
| CN103176095A (en) * | 2011-12-23 | 2013-06-26 | 比亚迪股份有限公司 | Device and method for electric leakage detection |
| CN103901325A (en) * | 2012-12-28 | 2014-07-02 | 上海申龙客车有限公司 | Insulation monitoring device of hybrid vehicle |
| CN104865506A (en) * | 2015-05-20 | 2015-08-26 | 王运国 | Insulation detection apparatus for DC gas system |
| CN105807138A (en) * | 2016-03-10 | 2016-07-27 | 南通大学 | Vehicle battery pack dynamic insulation resistor detection method |
| CN106597242A (en) * | 2017-02-09 | 2017-04-26 | 北京长城华冠汽车科技股份有限公司 | High-voltage line insulation detecting device |
| CN106645964A (en) * | 2016-12-30 | 2017-05-10 | 潍柴动力股份有限公司 | Insulation test method, master controller and insulation test instrument |
| CN107478993A (en) * | 2017-07-11 | 2017-12-15 | 中国科学技术大学 | A kind of bilateral insulation resistance monitoring device of electric automobile power battery |
| CN107478975A (en) * | 2017-07-31 | 2017-12-15 | 惠州市蓝微新源技术有限公司 | A kind of Insulation Inspection System of energy-accumulating power station |
| CN206818792U (en) * | 2017-03-17 | 2017-12-29 | 江苏斯菲尔电气股份有限公司 | Low voltage motor insulating resistor detecting circuit |
-
2018
- 2018-03-01 CN CN201810171897.2A patent/CN110221126B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2462355Y (en) * | 2000-05-30 | 2001-11-28 | 上海自动化仪表股份有限公司 | Micro power loss optical fiber transmitting multiple parameter transducer |
| JP2009162669A (en) * | 2008-01-09 | 2009-07-23 | Yokogawa Electric Corp | Insulation resistance measurement circuit |
| US20100277185A1 (en) * | 2009-05-01 | 2010-11-04 | Spectrum Technologies, Inc. | Soil moisture sensor |
| CN201886117U (en) * | 2010-09-29 | 2011-06-29 | 京滨电子装置研究开发(上海)有限公司 | Insulation detection circuit of electrically-propelled vehicle |
| CN102539917A (en) * | 2010-12-13 | 2012-07-04 | 河北深海电器有限公司 | Measurer for insulation resistance of direct-current high-voltage system for vehicle and method |
| CN103176095A (en) * | 2011-12-23 | 2013-06-26 | 比亚迪股份有限公司 | Device and method for electric leakage detection |
| CN103901325A (en) * | 2012-12-28 | 2014-07-02 | 上海申龙客车有限公司 | Insulation monitoring device of hybrid vehicle |
| CN104865506A (en) * | 2015-05-20 | 2015-08-26 | 王运国 | Insulation detection apparatus for DC gas system |
| CN105807138A (en) * | 2016-03-10 | 2016-07-27 | 南通大学 | Vehicle battery pack dynamic insulation resistor detection method |
| CN106645964A (en) * | 2016-12-30 | 2017-05-10 | 潍柴动力股份有限公司 | Insulation test method, master controller and insulation test instrument |
| CN106597242A (en) * | 2017-02-09 | 2017-04-26 | 北京长城华冠汽车科技股份有限公司 | High-voltage line insulation detecting device |
| CN206818792U (en) * | 2017-03-17 | 2017-12-29 | 江苏斯菲尔电气股份有限公司 | Low voltage motor insulating resistor detecting circuit |
| CN107478993A (en) * | 2017-07-11 | 2017-12-15 | 中国科学技术大学 | A kind of bilateral insulation resistance monitoring device of electric automobile power battery |
| CN107478975A (en) * | 2017-07-31 | 2017-12-15 | 惠州市蓝微新源技术有限公司 | A kind of Insulation Inspection System of energy-accumulating power station |
Non-Patent Citations (1)
| Title |
|---|
| 徐俊刚: "绝缘电阻在线检测技术研究", 《中国优秀硕士学位论文全文数据库 信息科技辑》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110221126B (en) | 2021-07-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3567711B1 (en) | Module of suppressing inrush current, method of controlling the same and on-board bidirectional charger using the same | |
| CN101025436B (en) | High-voltage safety monitoring device for electric automobile | |
| CN103476628B (en) | For the operating method of the charging unit of self-propelled vehicle high-tension battery, charge system and charge system | |
| CN101202445B (en) | Method for double feed-in DC power transmission | |
| CN201089681Y (en) | Elevator emergency equipment | |
| JPWO2011040128A1 (en) | Ground fault detection circuit and power supply device | |
| CN103278776B (en) | A kind of batteries of electric automobile Insulation Inspection System | |
| CN203289315U (en) | Novel frequency converter precharge circuit control system | |
| CN102611291A (en) | Input flyback series output-parallel circuit of single control unit | |
| CN104730441A (en) | Thyristor fault detecting device | |
| CN105391356A (en) | Starting control system and method of brushless double-fed motor | |
| CN105539164A (en) | Double-source electric locomotive converter | |
| CN203705598U (en) | Thyristor fault detection device | |
| WO2020170557A1 (en) | Electrical fault detection device and vehicle power supply system | |
| CN104908600A (en) | Safety control system of electric vehicle battery pack | |
| CN205176141U (en) | Electric automobile battery insulation detecting system | |
| CN105322773B (en) | Soft-start circuit and its operating method | |
| KR102158595B1 (en) | Insulation monitoring system | |
| CN206542353U (en) | Vidacare corp and electrical equipment | |
| CN110221126A (en) | Insulation impedance detection system and detection method | |
| CN102163837A (en) | Method for protecting inverter in distributed generating system | |
| CN105811537A (en) | Heavy current balance control system for super capacitors | |
| US20220014013A1 (en) | Power Electronic Converter with a Ground Fault Detection Unit that Shares a Common Ground with both DC Ports and AC Ports | |
| CN205544441U (en) | Portable emergent start power | |
| CN108490359A (en) | A kind of equipment, dynamical system and the automobile of detection power battery pack insulating properties |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |