CN207557409U - A kind of symmetrical insulation detecting circuit and insulation detection device - Google Patents
A kind of symmetrical insulation detecting circuit and insulation detection device Download PDFInfo
- Publication number
- CN207557409U CN207557409U CN201721808914.6U CN201721808914U CN207557409U CN 207557409 U CN207557409 U CN 207557409U CN 201721808914 U CN201721808914 U CN 201721808914U CN 207557409 U CN207557409 U CN 207557409U
- Authority
- CN
- China
- Prior art keywords
- controllable switch
- resistance
- insulation
- symmetrical
- resistor
- 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.)
- Active
Links
Abstract
This application discloses a kind of symmetrical insulation detecting circuit, including：Positive insulation resistance (31), negative insulation resistance (32), first resistor (11), second resistance (12), 3rd resistor (13), the 4th resistance (14), the 5th resistance (15), the first controllable switch (21), the second controllable switch (22), third controllable switch (23) and the 4th controllable switch (24).The symmetrical insulation detecting circuit overcomes " asymmetry detection " technological deficiency that principle is brought of prior art use, carries out identical high-precision Insulation monitoring to positive/negative insulation resistance in a symmetrical manner, calculation formula is simpler, data processing time is shorter.The application further simultaneously discloses a kind of insulation detection device for being provided with above-mentioned symmetrical insulation detecting circuit, has above-mentioned advantageous effect.
Description
Technical field
This application involves Insulation monitoring field, more particularly to a kind of symmetrical insulation detecting circuit and insulation detection device.
Background technology
With greatly developing for new energy field, electric power vehicle is all being studied in countries in the world energetically, for substituting to change
The stone energy be main body of consumption conventional truck, the discharge of atmosphere pollution can not only be reduced, additionally it is possible to reduce the production and operation into
This, there are many benefit.Therefore, the research of the charging pile for providing electric power supply for electric power vehicle is also constantly carried out.
Direct-current charging post is most commonly seen, due to being charged using direct current to electric power vehicle, compared to using exchange
The alternating-current charging pile of electricity, the voltage and current bigger that direct-current charging post provides, therefore the insulation for how carrying out direct-current charging post is
The most important thing.The existing Insulation monitoring measure for direct-current charging post using " asymmetry detection " principle, that is, is carrying out absolutely mostly
It is usually higher to the accuracy of detection of positive insulation resistance, error is smaller when edge detects, and to bear the accuracy of detection of insulation resistance compared with
It is low, error is larger, while the calculating of the prior art is complicated, cumbersome, data processing time is longer, actual use it is in bad order.
So how to design to obtain one kind overcomes " asymmetry detection " principle, in a symmetrical manner to positive/negative insulation resistance
Identical high-precision Insulation monitoring is carried out, and it is ability to calculate insulation detecting circuit relatively simple, that data processing time is shorter
Field technique personnel's urgent problem to be solved.
Invention content
The purpose of the application is to provide a kind of symmetrical insulation detecting circuit, overcomes the skill that " asymmetry detection " principle is brought
Art defect, in a symmetrical manner carries out positive/negative insulation resistance identical high-precision Insulation monitoring, and calculation formula is simpler
List, data processing time are shorter.
The another object of the application is to provide a kind of insulation detection device for being provided with above-mentioned symmetrical insulation detecting circuit.
To achieve the above object, the application provides a kind of symmetrical insulation detecting circuit, which includes
Positive insulation resistance, negative insulation resistance, first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, first controllably open
Pass, the second controllable switch, third controllable switch and the 4th controllable switch, wherein：
The first end of the positive insulation resistance respectively with the first end of the first resistor and the second resistance first
End is connected, and common end is connected with output plus terminal；The second end of the positive insulation resistance respectively with first controllable switch
First end, the first end of second controllable switch, the first end of the negative insulation resistance, the third controllable switch
The first end of one end and the 4th controllable switch is connected, and common end is grounded；The second end of the negative insulation resistance point
First end not with the first end of the 3rd resistor and the 4th resistance is connected, and common end is with exporting negative terminal phase
Even；The second end of first controllable switch is connected with the second end of the first resistor, and the second of the third controllable switch
End is connected with the second end of the 3rd resistor, the second end of second controllable switch respectively with the second resistance second
It holds, the first end of the 5th resistance is connected, the first end of second controllable switch and the first of the 4th controllable switch
End is connected, the second end of the 4th controllable switch respectively with the second end of the 4th resistance, the 5th resistance second
End is connected.
Optionally, the first resistor is identical with the resistance value of the 3rd resistor, the second resistance and the described 4th electricity
The resistance value of resistance is identical.
Optionally, first controllable switch and second controllable switch are the first on-off switch group simultaneously, described the
Three controllable switches and the 4th controllable switch are the second on-off switch group simultaneously.
Optionally, first controllable switch, second controllable switch, the third controllable switch and the described 4th
Controllable switch is relay.
Optionally, first controllable switch, second controllable switch, the third controllable switch and the described 4th
Controllable switch is IGBT.
Optionally, which further includes：
With first controllable switch, second controllable switch, the third controllable switch and the described 4th controllably
Switch is connected, for sending on-off signal to control the master control borad of each controllable switch on off operating mode.
To achieve the above object, it present invention also provides a kind of insulation detection device, is provided with as described by the above
Symmetrical insulation detecting circuit.
A kind of symmetrical insulation detecting circuit provided herein, including：Positive insulation resistance, negative insulation resistance, the first electricity
Resistance, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the first controllable switch, the second controllable switch, third controllable switch
And the 4th controllable switch, wherein：The first end of the positive insulation resistance respectively with the first end of the first resistor and described
The first end of second resistance is connected, and common end is connected with output plus terminal；The second end of the positive insulation resistance respectively with institute
State the first end of the first controllable switch, the first end of second controllable switch, the first end of the negative insulation resistance, described
The first end of three controllable switches and the first end of the 4th controllable switch are connected, and common end is grounded；The negative insulation
First end of the second end of resistance respectively with the first end of the 3rd resistor and the 4th resistance is connected, and common end is equal
It is connected with output negative terminal；The second end of first controllable switch is connected with the second end of the first resistor, and the third can
The second end of control switch is connected with the second end of the 3rd resistor, and the second end of second controllable switch is respectively with described the
The second end of two resistance, the first end of the 5th resistance are connected, and the first end of second controllable switch and the described 4th can
The first end of control switch is connected, the second end of the 4th controllable switch respectively with the second end of the 4th resistance, described the
The second end of five resistance is connected.
Obviously, technical solution provided herein overcomes the technological deficiency that " asymmetry detection " principle is brought, with right
The mode of title carries out positive/negative insulation resistance identical high-precision Insulation monitoring, calculation formula is simpler, data processing when
Between it is shorter.The application additionally provides a kind of insulation detection device simultaneously, has above-mentioned advantageous effect, details are not described herein.
Description of the drawings
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or it will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of application, for those of ordinary skill in the art, without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
The structure diagram of a kind of symmetrical insulation detecting circuit that Fig. 1 is provided by the embodiment of the present application；
Fig. 2 is a kind of structure diagram of equivalent circuit of symmetrical insulation detecting circuit shown in FIG. 1；
Fig. 3 is the structure diagram of another equivalent circuit of symmetrical insulation detecting circuit shown in FIG. 1.
Wherein：11. the 5th resistance 21. first of 12. second resistance of first resistor, 13. the 4th resistance 15. of 3rd resistor 14. can
31. positive 32. negative insulation resistance of insulation resistance of the 4th controllable switch of control switch 22. second controllable switch, 23. third controllable switch 24.
41. output plus terminal 42. exports 43. ground of negative terminal
Specific embodiment
Under normal circumstances, the resistance value size of positive/negative insulation resistance should be just infinite in principle, i.e., only just infinite
Just explanation is in real state of insulation in the case of resistance value, but in practical applications, since positive/negative end that may be present is to floor drain
The abnormal phenomenon that electric or other unknown causes generate, the resistance value for resulting in positive/negative insulation resistance is not infinite, that is, calculates knot
Fruit represents that positive/negative insulation resistance is denumerable rather than is infinite, non-denumerable, then can be determined that insulation has been failed.In reality
In the operating process of border, it will can in principle should be infinite resistance value and regard as a very big resistance value, and set it to absolutely
Edge threshold value, certainly, the insulation threshold value possess state of insulation judgement, not can arbitrarily set.Once in practical feelings
The actual resistance being calculated under condition is less than the insulation threshold value, then can be determined that insulation has been in failure state, conversely, then insulating
State is normal.
The core of the application is to provide a kind of symmetrical insulation detecting circuit and insulation detection device, overcomes " asymmetry inspection
Survey " the technological deficiency that principle is brought, in a symmetrical manner carries out positive/negative insulation resistance identical high-precision Insulation monitoring,
Calculation formula is simpler, data processing time is shorter.
Purpose, technical scheme and advantage to make the embodiment of the present application are clearer, below in conjunction with the embodiment of the present application
In attached drawing, the technical solution in the embodiment of the present application is clearly and completely described, it is clear that described embodiment is
Some embodiments of the present application, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art
The all other embodiment obtained without making creative work, shall fall in the protection scope of this application.
Below in conjunction with Fig. 1, the symmetrical insulation detecting circuit provided the application is illustrated：
The symmetrical insulation detecting circuit includes positive insulation resistance 31, negative insulation resistance 32, first resistor 11, second resistance
12nd, 3rd resistor 13, the 4th resistance 14, the 5th resistance 15, the first controllable switch 21, the second controllable switch 22, third are controllably opened
23 and the 4th controllable switch 24 of pass, wherein：
The first end of the positive insulation resistance 31 respectively with the first end of the first resistor 11 and the second resistance 12
First end be connected, common end is connected with output plus terminal 41；The second end of the positive insulation resistance 31 is respectively with described
It is the first end of one controllable switch 21, the first end of second controllable switch 22, the first end of the negative insulation resistance 32, described
The first end of third controllable switch 23 and the first end of the 4th controllable switch 24 are connected, and common end is grounded 43；Institute
State the second end of negative insulation resistance 32 respectively with the first end of the 3rd resistor 13 and the first end of the 4th resistance 14
It is connected, common end is connected with output negative terminal 42；The second end of first controllable switch 21 and the first resistor 11
Second end is connected, and the second end of the third controllable switch 23 is connected with the second end of the 3rd resistor 13, and described second can
First end of the second end of control switch 22 respectively with the second end of the second resistance 12, the 5th resistance 15 is connected, described
The first end of second controllable switch 22 is connected with the first end of the 4th controllable switch 24, and the of the 4th controllable switch 24
Two ends are connected respectively with the second end of the 4th resistance 14, the second end of the 5th resistance 15.
It should be noted that above mentioned first end and second end is respectively each insulation resistance, each resistance, each controllably opens
One of both ends of pass, there is no the differences on absolute order.Wherein, the first controllable switch 21, the second controllable switch 22, third can
Control switch 23 and the 4th controllable switch 24 are relay；Or IGBT etc. can realize the dress of same or similar function
It puts to realize.Meanwhile it to realize the control to controllable switch, can also set and the first controllable switch 21, the second controllable switch
22nd, 23 and the 4th controllable switch 24 of third controllable switch is connected, for sending on-off signal so that each controllable switch to be controlled to lead to
The master control borad of disconnected state.
Moreover, under the premise of it can realize identical purpose, the resistance value of the first to the 5th resistance can be carried out flexible
Adjustment, and the equivalent resistance of these resistance may be used to carry out whole replacement, for example, the resistance value of first resistor 11 is 100 Ω,
The series resistance of 2 50 Ω may be used at this time to replace the first resistor 11 or be carried out simultaneously using the resistance of 2 200 Ω
Join to replace the first resistor 11, identical, other replaceable resistance can also not do specific limit herein in this way
It is fixed, as long as the function that the resistance needs for being arranged on target location are realized can be realized.
As shown in Figure 1, can obtain being substantially to appear as the symmetrical circuit structure of upper and lower two parts, the wherein first half sets up separately
It is equipped with positive insulation resistance 31, first resistor 11,12 and first controllable switch 21 of second resistance and the second controllable switch 22；Lower half
Part is provided with negative insulation resistance 32,23 and the 4th controllable switch of 3rd resistor 13, the 4th resistance 14 and third controllable switch
24, and it is public resistance that the 5th resistance 15, which is then located at upper and lower two-part centre, thus forms the application to overcome the prior art
" asymmetry detection " principle used and the symmetrical insulation detecting circuit provided.
Based on above-mentioned Insulation monitoring principle, the symmetrical insulation detecting circuit that the application provides realizes the big of symmetrical Insulation monitoring
Body process is as follows：
When the resistance value of positive insulation resistance 31 and negative insulation resistance 32 is just infinite, two insulation benchmark electricity are calculated
Press reference value；Wherein, two insulation reference voltage reference values specifically include positive insulation reference voltage reference value and negative insulation benchmark
Voltage reference value；
Two actual insulation voltage values at 15 both ends of the 5th resistance under actual conditions are obtained successively；Wherein, two reality are exhausted
Edge voltage value specifically includes practical positive insulation voltage value and actual negative insulation voltage value；
Two actual insulation voltage values and two insulation reference voltage reference values are compared, obtain comparison result, and
Corresponding actual insulation resistance is calculated using corresponding calculation formula according to comparison result.
In symmetrical insulation detecting circuit provided herein, first by positive insulation resistance 31 and negative insulation resistance 32
Resistance value size is set as just infinite under desired insulation state, and obtains corresponding two insulation according to just infinite computing the resistor value
Reference voltage reference value；Then, two actual insulation voltage values at 15 both ends of the 5th resistance under actual conditions are obtained successively, i.e., in fact
The positive insulation voltage value in border and actual negative insulation voltage value；Finally by two actual insulation voltage values and two insulation reference voltage ginsengs
It examines value to be compared, obtains comparison result, and corresponding reality is calculated using corresponding calculation formula according to comparison result
Insulation resistance resistance value.The corresponding insulation voltage of positive/negative insulation resistance that will be under desired insulation state is as insulation benchmark
Voltage is substantially identical to above mentioned insulation threshold value, and the actual insulation voltage with being obtained under actual conditions carries out size ratio
Compared with, be also similar to that with insulation threshold value be compared realize state of insulation judgement process.
It is desirable in the acquisition process of actual insulation voltage value due to being broadly divided into two parts symmetrical above and below
It is obtained successively according to upper and lower two parts, i.e., obtains one of those first, then obtain another, the acquisition of two different parameters
It is that the on off operating mode of controllable switch in two parts up and down is controlled to realize.
Process is substantially realized based on above-mentioned, and a kind of opposite concrete implementation process is given below：
When the resistance value of first resistor 11, second resistance 12,3rd resistor 13, the 4th resistance 14 and the 5th resistance 15 is distinguished
Resistance value for R1, R2, R3, R4 and R5, positive insulation resistance 31 and negative insulation resistance 32 is respectively Ra and Rb, output plus terminal 41
Voltage with output negative terminal 42 voltage difference be U when,
Utilize calculation formulaNegative insulation reference voltage reference value U is calculated01, utilize
Calculation formulaPositive insulation reference voltage reference value U is calculated02；
It is closed the first controllable switch 21 and the second controllable switch 22, disconnects third controllable switch 23 and the 4th controllable switch
24；
The actual negative insulation voltage value at 15 both ends of the 5th resistance is measured using voltage measuring apparatus；It may refer to Fig. 2 at this time,
Fig. 2 is a kind of structure diagram of equivalent circuit of symmetrical insulation detecting circuit shown in FIG. 1；
It disconnects the first controllable switch 21 and the second controllable switch 22, be closed third controllable switch 23 and the 4th controllable switch
24；
The practical positive insulation voltage value at 15 both ends of the 5th resistance is measured using voltage measuring apparatus；It may refer to Fig. 3 at this time,
Fig. 3 is the structure diagram of another equivalent circuit of symmetrical insulation detecting circuit shown in FIG. 1；
When practical positive insulation voltage value is more than positive insulation reference voltage reference value, actual negative insulation voltage value is less than negative insulation
During reference voltage reference value, judge that negative insulation resistance 32 is in nonisulated state；
When actual negative insulation voltage value is more than negative insulation reference voltage reference value, practical positive insulation voltage value is less than positive insulation
During reference voltage reference value, judge that positive insulation resistance 31 is in nonisulated state；
When actual insulation voltage value is more than or less than insulation reference voltage reference value, judges positive insulation resistance 31 and bear exhausted
Edge resistance 32 is in nonisulated state.
It, can be by the first controllable switch 21 and second for convenience of the control for carrying out two parts controllable switch on off operating mode up and down
Controllable switch 22 be set as first simultaneously on-off switch group, 23 and the 4th controllable switch 24 of third controllable switch is set as second
On-off switch group simultaneously, i.e., first the on off operating mode of on-off switch group represents institute in group simultaneously for on-off switch group, second simultaneously
There is the on off operating mode that controllable switch should be at.For example it illustrates, if on-off switch group is on simultaneously for control first
On-off switch group is off simultaneously for state, control second, i.e. the first controllable switch and the second controllable switch are in leading
Logical state, third controllable switch and the 4th controllable switch are in off-state.Meanwhile calculated for convenience of follow-up, it can also set
Put that first resistor 11 is identical with the resistance value of 3rd resistor 13, second resistance 12 is identical with the resistance value of the 4th resistance 14.
A kind of only specific testing process is given above, i.e., on-off switch group is on simultaneously for control first first
On-off switch group is off simultaneously for state, second, obtains equivalent circuit diagram shown in Fig. 2, and measure in the case
Practical positive insulation voltage value；And then control first simultaneously on-off switch group be off, second simultaneously on-off switch group
It is in the conduction state, equivalent circuit diagram shown in Fig. 3 is obtained, and measure actual negative insulation voltage value in the case.Certainly,
Can equivalent circuit diagram as shown in Figure 3 first be obtained, then obtain equivalent circuit diagram as shown in Figure 2, herein simultaneously with reversed order
It is not specifically limited.
Based on above-mentioned technical proposal, a kind of symmetrical insulation detecting circuit provided by the embodiments of the present application overcomes " asymmetric
The technological deficiency that detection " principle is brought in a symmetrical manner carries out positive/negative insulation resistance identical high-precision insulation inspection
It surveys, calculation formula is simpler, data processing time is shorter.
Because situation is complicated, it can not enumerate and be illustrated, those skilled in the art should be able to recognize more the application
The basic skills principle combination actual conditions of offer may have many examples, in the case where not paying enough creative works,
It should be in the protection domain of the application.
Meanwhile present invention also provides a kind of insulation detection devices, are provided with such as the described symmetrical insulation of the above
Detection circuit possesses identical advantageous effect.
Each embodiment is described by the way of progressive in specification, the highlights of each of the examples are with other realities
Apply the difference of example, just to refer each other for identical similar portion between each embodiment.
The principle and implementation of this application are described for specific case used herein, and above example is said
It is bright to be merely used to help understand the present processes and its core concept.It should be pointed out that the ordinary skill for the art
For personnel, under the premise of the application principle is not departed from, can also to the application, some improvement and modification can also be carried out, these improvement
It is also fallen into the application scope of the claims with modification.
It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, term " comprising ", "comprising" or its any other variant meaning
Covering non-exclusive inclusion, so that process, method, article or equipment including a series of elements not only include that
A little elements, but also including the other elements being not explicitly listed or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except also there are other identical elements in the process including element, method, article or equipment.
Claims (7)
1. a kind of symmetrical insulation detecting circuit, which is characterized in that including positive insulation resistance (31), negative insulation resistance (32), first
Resistance (11), second resistance (12), 3rd resistor (13), the 4th resistance (14), the 5th resistance (15), the first controllable switch
(21), the second controllable switch (22), third controllable switch (23) and the 4th controllable switch (24), wherein：
The first end of the positive insulation resistance (31) respectively with the first end of the first resistor (11) and the second resistance
(12) first end is connected, and common end is connected with output plus terminal (41)；The second end difference of the positive insulation resistance (31)
The first end of first end, second controllable switch (22) with first controllable switch (21), the negative insulation resistance
(32) first end, the first end of the third controllable switch (23) and the first end phase of the 4th controllable switch (24)
Even, common end is grounded (43)；The second end of the negative insulation resistance (32) respectively with the 3rd resistor (13) first
The first end of end and the 4th resistance (14) is connected, and common end is connected with output negative terminal (42)；Described first is controllable
Switch (21) second end be connected with the second end of the first resistor (11), the second end of the third controllable switch (23) and
The second end of the 3rd resistor (13) is connected, the second end of second controllable switch (22) respectively with the second resistance
(12) second end, the first end of the 5th resistance (15) is connected, the first end of second controllable switch (22) with it is described
The first end of 4th controllable switch (24) is connected, the second end of the 4th controllable switch (24) respectively with the 4th resistance
(14) second end, the second end of the 5th resistance (15) is connected.
2. symmetrical insulation detecting circuit according to claim 1, which is characterized in that the first resistor (11) and described the
The resistance values of three resistance (13) is identical, the second resistance (12) is identical with the resistance value of the 4th resistance (14).
3. symmetrical insulation detecting circuit according to claim 2, which is characterized in that first controllable switch (21) and institute
The second controllable switch (22) is stated as first while on-off switch group, the third controllable switch (23) and the 4th controllable switch
(24) it is second while on-off switch group.
4. symmetrical insulation detecting circuit according to claim 3, which is characterized in that first controllable switch (21), institute
It is relay to state the second controllable switch (22), the third controllable switch (23) and the 4th controllable switch (24).
5. symmetrical insulation detecting circuit according to claim 4, which is characterized in that first controllable switch (21), institute
It is IGBT to state the second controllable switch (22), the third controllable switch (23) and the 4th controllable switch (24).
6. symmetrical insulation detecting circuit according to claim 5, which is characterized in that further include：
With first controllable switch (21), second controllable switch (22), the third controllable switch (23) and described
4th controllable switch (24) is connected, for sending on-off signal to control the master control borad of each controllable switch on off operating mode.
7. a kind of insulation detection device, which is characterized in that set and symmetrically insulate inspection just like claim 1 to 6 any one of them
Slowdown monitoring circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721808914.6U CN207557409U (en) | 2017-12-21 | 2017-12-21 | A kind of symmetrical insulation detecting circuit and insulation detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721808914.6U CN207557409U (en) | 2017-12-21 | 2017-12-21 | A kind of symmetrical insulation detecting circuit and insulation detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207557409U true CN207557409U (en) | 2018-06-29 |
Family
ID=62660128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721808914.6U Active CN207557409U (en) | 2017-12-21 | 2017-12-21 | A kind of symmetrical insulation detecting circuit and insulation detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207557409U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108983105A (en) * | 2018-07-26 | 2018-12-11 | 浙江慧众智能装备科技有限公司 | A kind of battery insulation detection circuit and its control method |
| CN109116281A (en) * | 2018-09-25 | 2019-01-01 | 北京长城华冠汽车科技股份有限公司 | A kind of diagnostic system and method for batteries of electric automobile group insulating resistor detecting circuit |
| CN111812474A (en) * | 2020-08-12 | 2020-10-23 | 南京能瑞自动化设备股份有限公司 | Insulation detection circuit, system and method for DC charging pile |
| CN112285500A (en) * | 2020-10-20 | 2021-01-29 | 深圳英飞源技术有限公司 | Insulation detection circuit and control method thereof |
-
2017
- 2017-12-21 CN CN201721808914.6U patent/CN207557409U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108983105A (en) * | 2018-07-26 | 2018-12-11 | 浙江慧众智能装备科技有限公司 | A kind of battery insulation detection circuit and its control method |
| CN108983105B (en) * | 2018-07-26 | 2024-03-15 | 浙江慧众智能装备科技有限公司 | Battery insulation detection circuit and control method thereof |
| CN109116281A (en) * | 2018-09-25 | 2019-01-01 | 北京长城华冠汽车科技股份有限公司 | A kind of diagnostic system and method for batteries of electric automobile group insulating resistor detecting circuit |
| CN111812474A (en) * | 2020-08-12 | 2020-10-23 | 南京能瑞自动化设备股份有限公司 | Insulation detection circuit, system and method for DC charging pile |
| CN112285500A (en) * | 2020-10-20 | 2021-01-29 | 深圳英飞源技术有限公司 | Insulation detection circuit and control method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207557409U (en) | A kind of symmetrical insulation detecting circuit and insulation detection device | |
| CN104535839B (en) | Photovoltaic grid-connected inverter insulation resistance detecting method and detecting device for implementing same | |
| CN103713197A (en) | Cell tester | |
| CN105911353A (en) | Automobile insulation resistance detection circuit and method | |
| CN109521359A (en) | A kind of negative relay status detection circuit of power battery master and method | |
| CN102830283A (en) | Insulating detection device and detection method for direct-current power supply | |
| CN107957546A (en) | A kind of detection method and equipment of grid-connected inverters AC relay | |
| CN105372552B (en) | A kind of load open-circuit detection circuit and method for high side switches | |
| CN209514004U (en) | A kind of negative relay status detection circuit of power battery master | |
| CN207067227U (en) | Sample circuit and current measurement circuit | |
| CN105958621B (en) | One kind being used for capacitor group Bridge differential current protection out-of-balance current leveling method | |
| CN108896823A (en) | A kind of method of charging resistor detection | |
| CN106452358A (en) | Insulation-against-ground impedance detection method and detection circuit for photovoltaic cell panel | |
| CN202929116U (en) | Battery tester | |
| CN115015744A (en) | AC charging pile relay adhesion detection circuit | |
| CN102508155A (en) | Test circuit for internally installed load switch of intelligent electric energy meter | |
| CN202177679U (en) | One-point grounding detection device for secondary coil neutral wire of voltage transformer | |
| CN104483041A (en) | Temperature rise measurement method and device of coil winding | |
| CN206132836U (en) | Current inspecting circuit and device | |
| CN104104330A (en) | Insulation detection system and insulation detection method for photovoltaic energy storage system | |
| CN105527498B (en) | The detection method and device of electric car and its high voltage component insulation against ground resistance | |
| CN207336641U (en) | A kind of electric car high-voltage isulation detecting system | |
| CN106546825B (en) | Intelligent wireless transmission micro-opening self-zero-drift correction microcomputer insulation comprehensive detection system | |
| CN105914723B (en) | The switching device of residual current circuit breaker | |
| CN104698361B (en) | The test device of SPM |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 518000 room 118, 1 Kang Hesheng building, 1 Chuang Sheng Road, Xili street, Nanshan District, Shenzhen, Guangdong. Patentee after: SHENZHEN KEHUA HENGSHENG TECHNOLOGY Co.,Ltd. Patentee after: XIAMEN KEHUAHENGSHENG LIMITED BY SHARE Ltd. Address before: 518000 room 118, 1 Kang Hesheng building, 1 Chuang Sheng Road, Xili street, Nanshan District, Shenzhen, Guangdong. Patentee before: SHENZHEN KEHUA HENGSHENG TECHNOLOGY Co.,Ltd. Patentee before: XIAMEN KEHUA HENGSHENG Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210115 Address after: 518000 room 118, 1 Kang Hesheng building, 1 Chuang Sheng Road, Xili street, Nanshan District, Shenzhen, Guangdong. Patentee after: SHENZHEN KEHUA HENGSHENG TECHNOLOGY Co.,Ltd. Address before: 518000 room 118, 1 Kang Hesheng building, 1 Chuang Sheng Road, Xili street, Nanshan District, Shenzhen, Guangdong. Patentee before: SHENZHEN KEHUA HENGSHENG TECHNOLOGY Co.,Ltd. Patentee before: XIAMEN KEHUAHENGSHENG LIMITED BY SHARE Ltd. |
|
| TR01 | Transfer of patent right |