CN206038771U - Electric automobile insulation resistance detection circuitry - Google Patents
Electric automobile insulation resistance detection circuitry Download PDFInfo
- Publication number
- CN206038771U CN206038771U CN201620927091.8U CN201620927091U CN206038771U CN 206038771 U CN206038771 U CN 206038771U CN 201620927091 U CN201620927091 U CN 201620927091U CN 206038771 U CN206038771 U CN 206038771U
- Authority
- CN
- China
- Prior art keywords
- resistance
- controlling switch
- electric automobile
- switch
- 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.)
- Expired - Fee Related
Links
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model discloses an electric automobile insulation resistance detection circuitry, including six resistance, five control switch, the 3rd control switch, first resistance, second resistance, the 5th resistance, the 6th resistance, third resistance, fourth resistance, fourth control switch establish ties, and wherein one end is connected with electric automobile power battery is anodal, and the other end is connected with the electric automobile power battery negative pole, a control switch ties for with first resistance, the 2nd control switch and fourth resistor parallel with, the body connection of the 5th control switch one end and ground connection, the other end inserts the line between the 5th resistance and the 6th resistance, the both ends of the 5th resistance are equipped with voltage acquisition point, the both ends of the 6th resistance are equipped with the 2nd voltage acquisition point. The utility model discloses an improve, provide the electric automobile insulation resistance detection circuitry safer, accurate, that the interference killing feature is stronger.
Description
Technical field
This utility model is related to New-energy electric vehicle field, more particularly to a kind of electric automobile insulation resistance detection electricity
Road.
Background technology
In order to reach certain electric pressure, usually multiple batteries are used in series in electric automobile, in electric automobile
In the middle of actual motion, working environment is more complicated, the reason such as vibration abrasion, the change of humidity, liquid corrosion, can all cause insulation
The decline of performance, jeopardizes personal safety.Therefore, Insulation monitoring technology is very crucial.
There is following defect in conventional insulator resistance detecting circuit：
1. conventional insulator resistance detecting circuit has been connected between high pressure positive and negative busbar resistance always, can cause certain leakage
Electric current.Reduce the insulation characterisitic of car body.
2. detecting system computing formula is complicated, and capacity of resisting disturbance is poor.
3. insulation measurement narrow range.Because insulation resistance Rp and Rn are the various permutation and combination of 0～∞, therefore not
The resistance of all insulation resistances can accurately be measured.Detecting system redundancy is little, easily surveys by mistake.
Therefore, prior art existing defects, need to improve.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, there is provided a kind of electric automobile insulation resistance detection electricity
Road.
The technical solution of the utility model is as follows：
A kind of electric automobile insulation resistance detecting circuit, including first resistor, second resistance, 3rd resistor, the 4th resistance,
5th resistance, the 6th resistance, the first controlling switch, the second controlling switch, the 3rd controlling switch, the 4th controlling switch, the 5th control
System switch；It is 3rd controlling switch, first resistor, second resistance, the 5th resistance, the 6th resistance, 3rd resistor, the 4th electric
Resistance, the series connection of the 4th controlling switch, wherein one end is connected with electric automobile power battery positive pole, and the other end is electric with electric powered motor
Pond negative pole connection；First controlling switch and first resistor side by side, the second controlling switch and the 4th resistor coupled in parallel；Described 5th
Controlling switch one end is connected with the vehicle body of ground connection, and the other end accesses the line between the 5th resistance and the 6th resistance；Described 5th
The two ends of resistance are provided with first voltage collection point, and the two ends of the 6th resistance are provided with second voltage collection point.
It is preferred that the 5th resistance and the 6th resistance two ends are connected to A/D modular converters altogether；The A/D modular converters take
Obtain the magnitude of voltage of first voltage collection point and second voltage collection point；The shown A/D modular converters are connected to an isolation module.
Further, the A/D modular converters refer to the modular circuit of all analog-to-digitals or integrated IC.
Further, the isolation module is that integrated IC or discrete optocouplers etc. play electrical equipment isolation in terms of communication
The module of effect.
Further, five controlling switches are electrical switch, the relay used as switch.
Using such scheme, this utility model has the advantage that：
1., when Insulation monitoring is not carried out, can accomplish without leakage current.So as to more excellent protection high-tension battery system
System；
2. because there is the presence of the first controlling switch and the second controlling switch.So improve the scope of application of formula.Increase
Big the 5th resistance of resistance, the difference of the sampled voltage at the 6th resistance two ends.Optimize signal to noise ratio.Enhance the anti-of formula itself
Interference performance；
3. because there is segmentation situation to process, and different mathematical modeies are set up for different situations.Such that it is able to more
Plus accurately measure the resistance of insulation resistance；And improve the measurement range of insulation resistance；
4. shift to an earlier date the Standard resistance range of the tested insulation resistance of anticipation, so as to carry out different actions, substitute into different formula；With
The priority of simple formula is highest, so as to avoid the abuse of complicated formulas, improves the redundancy amount of system, and anti-interference energy
Power is greatly reinforced；
5., by judging total voltage link, the circuit arrangement self-checking function is realized；
Description of the drawings
Fig. 1 is structural representation of the present utility model；
Flow charts of the Fig. 2 for this utility model Insulation monitoring.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, this utility model is described in detail.
With reference to shown in Fig. 1, this utility model provides a kind of electric automobile insulation resistance detecting circuit, including first resistor
R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R, the 6th resistance R ', the first controlling switch S1, second
Controlling switch S2, the 3rd controlling switch S3, the 4th controlling switch S4, the 5th controlling switch S；3rd controlling switch S3,
One resistance R1, second resistance R2, the 5th resistance R, the 6th resistance R ', 3rd resistor R3, the 4th resistance R4, the 4th controlling switch S4
Series connection, wherein one end is connected with electric automobile power battery positive pole, and the other end is connected with electric automobile power battery negative pole；It is described
With first resistor R1 side by side, the second controlling switch S2 is in parallel with the 4th resistance R4 for first controlling switch S1；5th control is opened
The vehicle body that S one end is closed with ground connection is connected, and the other end accesses the line between the 5th resistance R and the 6th resistance R '；Described 5th is electric
The two ends of resistance R are provided with first voltage collection point, and the two ends of the 6th resistance R ' are provided with second voltage collection point.
5th resistance R and the 6th resistance R ' two ends are connected to A/D modular converters altogether；The A/D modular converters obtain the
Voltage acquisition point and the magnitude of voltage of second voltage collection point；The shown A/D modular converters are connected to an isolation module.
The A/D modular converters refer to the modular circuit of all analog-to-digitals or integrated IC.
The isolation module can be that integrated IC, or discrete optocoupler etc. play electrical equipment isolation in terms of communication
The module of effect.
Controlling switch S, S1, S2, S3, S4 can be the units that electrical switch, or relay etc. are used as switch
Part.
So-called insulation resistance Rp is to determine voltage by the different folding of each controlling switch in 2 voltage acquisition points from Rn,
Get so as to calculate, to judge between vehicle body and electrokinetic cell with the presence or absence of electric leakage potential safety hazard.
The symbol implication that the technical program occurs：
1), Ub is electrokinetic cell total voltage；
2), U1, U2 are switch S, S3, S4 closure, when S1, S2 disconnect, the voltage measured by A/D modular converters；
3), U1 ', U2 ' are switch S, S1, S3, S4 closure, when S2 disconnects, the voltage measured by A/D modular converters；
4), U1 ", U2 " is switch S, S2, S3, S4 closure, when S1 disconnects, the voltage measured by A/D modular converters；
5) a and b for, occurring in protocol procedures is threshold value；
6), U3, U4 are switch S3, S4 closure, when S, S1, S2 disconnect, the voltage measured by A/D modular converters；
7), resistance R1, R2, R3, R4, R, R ' is known resistance.Rp is represented between total positive bus-bar and shell the earth
Intrinsic insulation resistance, Rn represent the intrinsic insulation resistance between total negative busbar and shell the earth.
With reference to shown in Fig. 2, it is concrete detecting step below：
1), Insulation monitoring starts；
2), confirm that S, S1～S4 is off-state, now A/D modular converters it is adopted voltage should to be 0V left
It is right.If it is not, then explanation switch S, S1～S4 cannot ensure which is the state of being fully disconnected, needs are reexamined and are safeguarded；
3), only by S3, S4 closures, other switches are remained open, into step 4；
4), now A/D modular converters measure 2 groups of parameters：U3, U4, and U3 ≈ U4 should be met.Now total voltage should meet：
Whether total voltage meets normal range of operation, and can be released when total voltage value is Ub according to GB18384,
The alarm threshold value of Rp and Rn is how many, is then turned off all switches；
5), only in the case of closure switch S, S3, S4, U1, U2 are measured by A/D modular converters；
6), there are various from 0～∞ in positive bus-bar insulation resistance Rp and negative busbar over the ground insulation resistance Rn over the ground
Meaning combination, here.We are classified as several situations, and are preferentially processed for this several situation.Situation 1：Rp<<
Rn or Rn<<The situation of Rp.But inside situation 1, there are a kind of extreme case, i.e. situation 2 again：Rp, Rn wherein any one
There is short circuit (when i.e. impedance is 0 Ω or so).When there is situation 1, or U1 and U2 be U1<<U2 or U2<<U1, it is contemplated that
Electric pressure to each battery bag high-pressure system is different, and we can set threshold value a.Judge, if U1/U2<A, or
U2/U1<A then enters into step 6, if be unsatisfactory for, enters into step 7；
If 7), continue as described above to judge on the premise of situation 1 occurs, if situation 2 occurs.Assume Rp, Rn is wherein
When any one short-circuit conditions occurs, wherein any one can be substantially equal to 0V to U1 and U2, it is contemplated that the redundancy of system
Design and the influence of noise of circuit itself, we can set minimum b.Judge whether to meet U1<B, or U2<b.Such as
Fruit meets；If being unsatisfactory for entering into step 10；
8) S3, S4, S, S1 are only closed, and disconnects S2, measured U1 ', U2 ', a side is generated according to Kirchhoff's current law (KCL)
Journey：
Subsequently into step 9；
9), only close S3, S4, S, S2, disconnect S1 measure U1 ", U2 ", according to Kirchhoff's current law (KCL) generate a side
Journey：
Into step 10；
10), by U1 ', U2 ', U1 ", U2 " bring insulation formula 1 and formula 2 into：
11), because by U1, anticipation goes out Rp to U2<<Rn or Rn<<Rp, then according to Kirchhoff's current law (KCL), can shape
Into a new equation：
Or
So as to release insulation formula 3 and formula 4, U1, U2 is brought into insulation formula 3 and formula 4.Because Rp<<Rn or Rn
<<Rp, if so Rp<<Rn.Then
If Rn<<Rp, then
12), basis directly displays 0 Ω of U1 ≈ if U1 ＜ b；0 Ω of U2 ≈ are directly displayed if U2 ＜ b.
13), the Rp and Rn of result will be calculated, according to GB18384, it is insulation fault to carry out judging whether.
Preferred embodiment of the present utility model is these are only, this utility model is not limited to, it is all in this practicality
Any modification, equivalent and improvement for being made within new spirit and principle etc., should be included in guarantor of the present utility model
Within the scope of shield.
Claims (5)
1. a kind of electric automobile insulation resistance detecting circuit, it is characterised in that including first resistor, second resistance, 3rd resistor,
4th resistance, the 5th resistance, the 6th resistance, the first controlling switch, the second controlling switch, the 3rd controlling switch, the 4th control are opened
Pass, the 5th controlling switch；It is 3rd controlling switch, first resistor, second resistance, the 5th resistance, the 6th resistance, the 3rd electric
Resistance, the 4th resistance, the 4th controlling switch series connection, wherein one end is connected with electric automobile power battery positive pole, the other end with it is electronic
Automobile power cell negative pole connects；With first resistor side by side, the second controlling switch is with the 4th resistance simultaneously for first controlling switch
Connection；Described 5th controlling switch one end is connected with the vehicle body of ground connection, and the other end accesses the company between the 5th resistance and the 6th resistance
Line；The two ends of the 5th resistance are provided with first voltage collection point, and the two ends of the 6th resistance are provided with second voltage collection point.
2. detection circuit according to claim 1, it is characterised in that the 5th resistance and the 6th resistance two ends are connected to altogether
A/D modular converters；The A/D modular converters obtain the magnitude of voltage of first voltage collection point and second voltage collection point；Shown institute
State A/D modular converters and be connected to an isolation module.
3. detection circuit according to claim 2, it is characterised in that mould of the A/D modular converters for analog-to-digital
Block circuit or integrated IC.
4. detection circuit according to claim 2, it is characterised in that the isolation module is integrated IC or discrete optocouplers
Device.
5. detection circuit according to claim 1, it is characterised in that five controlling switches are electrical switch, make as switch
Relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620927091.8U CN206038771U (en) | 2016-08-23 | 2016-08-23 | Electric automobile insulation resistance detection circuitry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620927091.8U CN206038771U (en) | 2016-08-23 | 2016-08-23 | Electric automobile insulation resistance detection circuitry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206038771U true CN206038771U (en) | 2017-03-22 |
Family
ID=58303031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620927091.8U Expired - Fee Related CN206038771U (en) | 2016-08-23 | 2016-08-23 | Electric automobile insulation resistance detection circuitry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206038771U (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107643449A (en) * | 2017-08-18 | 2018-01-30 | 深圳市朗能动力技术有限公司 | Detection circuit and detection method of the high pressure to the insulaion resistance of low pressure |
| CN108427057A (en) * | 2018-03-27 | 2018-08-21 | 深圳市国新动力科技有限公司 | A kind of double source method insulation leakagel volume leakage detection circuit and its insulation leakagel volume leakage detection method |
| CN108872812A (en) * | 2018-06-29 | 2018-11-23 | 深圳市国新动力科技有限公司 | A kind of low cost insulation leakagel volume leakage detection circuit and detection method |
| CN109061307A (en) * | 2018-09-06 | 2018-12-21 | 北京长城华冠汽车科技股份有限公司 | The method for diagnosing faults of insulating resistor detecting circuit |
| CN109444507A (en) * | 2018-10-31 | 2019-03-08 | 山东鲁能智能技术有限公司 | A kind of electric car direct-current charging post charging voltage Acquisition Circuit, Insulation Inspection System and method |
| CN110346643A (en) * | 2019-07-23 | 2019-10-18 | 安徽贵博新能科技有限公司 | A kind of battery insulation resistance detecting circuit and detection method |
| CN111208350A (en) * | 2020-03-11 | 2020-05-29 | 上海度普新能源科技有限公司 | Insulation detection circuit and energy storage charging equipment |
| CN111537905A (en) * | 2020-05-29 | 2020-08-14 | 深圳市慧源动力技术有限公司 | Efficient insulation leakage detection circuit and insulation leakage detection method |
| 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 |
| WO2021101059A1 (en) * | 2019-11-18 | 2021-05-27 | 주식회사 엘지에너지솔루션 | Apparatus for measuring insulation resistance and battery system using same |
| CN112986684A (en) * | 2021-02-02 | 2021-06-18 | 深圳车库电桩科技有限公司 | Fill electric pile insulation detection circuitry |
| CN113567743A (en) * | 2021-07-16 | 2021-10-29 | 东风汽车集团股份有限公司 | Detection system and method for electric vehicle power converter |
| CN113884832A (en) * | 2021-10-18 | 2022-01-04 | 智新控制系统有限公司 | Electric vehicle battery insulation detection system and method |
| CN113945760A (en) * | 2021-10-18 | 2022-01-18 | 北京电子科技职业学院 | Electric automobile insulation resistance detecting system |
| CN116125302A (en) * | 2023-04-04 | 2023-05-16 | 滨州市道王动力有限公司 | Battery insulation monitoring circuit of beach vehicle |
| CN117538713A (en) * | 2024-01-10 | 2024-02-09 | 京清数电(北京)技术有限公司 | Energy storage converter, insulation detection circuit, detection method, detection device and medium thereof |
-
2016
- 2016-08-23 CN CN201620927091.8U patent/CN206038771U/en not_active Expired - Fee Related
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107643449A (en) * | 2017-08-18 | 2018-01-30 | 深圳市朗能动力技术有限公司 | Detection circuit and detection method of the high pressure to the insulaion resistance of low pressure |
| CN108427057A (en) * | 2018-03-27 | 2018-08-21 | 深圳市国新动力科技有限公司 | A kind of double source method insulation leakagel volume leakage detection circuit and its insulation leakagel volume leakage detection method |
| CN108872812A (en) * | 2018-06-29 | 2018-11-23 | 深圳市国新动力科技有限公司 | A kind of low cost insulation leakagel volume leakage detection circuit and detection method |
| CN109061307A (en) * | 2018-09-06 | 2018-12-21 | 北京长城华冠汽车科技股份有限公司 | The method for diagnosing faults of insulating resistor detecting circuit |
| CN109444507A (en) * | 2018-10-31 | 2019-03-08 | 山东鲁能智能技术有限公司 | A kind of electric car direct-current charging post charging voltage Acquisition Circuit, Insulation Inspection System and method |
| CN109444507B (en) * | 2018-10-31 | 2021-08-20 | 山东鲁软数字科技有限公司智慧能源分公司 | Charging voltage acquisition circuit of electric automobile direct current charging pile, insulation detection system and method |
| CN110346643A (en) * | 2019-07-23 | 2019-10-18 | 安徽贵博新能科技有限公司 | A kind of battery insulation resistance detecting circuit and detection method |
| WO2021101059A1 (en) * | 2019-11-18 | 2021-05-27 | 주식회사 엘지에너지솔루션 | Apparatus for measuring insulation resistance and battery system using same |
| US11841389B2 (en) | 2019-11-18 | 2023-12-12 | Lg Energy Solution, Ltd. | Apparatus for estimating insulation resistance and battery system using the same |
| CN111208350B (en) * | 2020-03-11 | 2022-04-29 | 上海度普新能源科技有限公司 | Insulation detection circuit and energy storage charging equipment |
| CN111208350A (en) * | 2020-03-11 | 2020-05-29 | 上海度普新能源科技有限公司 | Insulation detection circuit and energy storage charging equipment |
| CN111537905A (en) * | 2020-05-29 | 2020-08-14 | 深圳市慧源动力技术有限公司 | Efficient insulation leakage detection circuit and insulation leakage detection method |
| 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 |
| CN112986684A (en) * | 2021-02-02 | 2021-06-18 | 深圳车库电桩科技有限公司 | Fill electric pile insulation detection circuitry |
| CN113567743A (en) * | 2021-07-16 | 2021-10-29 | 东风汽车集团股份有限公司 | Detection system and method for electric vehicle power converter |
| CN113884832A (en) * | 2021-10-18 | 2022-01-04 | 智新控制系统有限公司 | Electric vehicle battery insulation detection system and method |
| CN113945760A (en) * | 2021-10-18 | 2022-01-18 | 北京电子科技职业学院 | Electric automobile insulation resistance detecting system |
| CN116125302A (en) * | 2023-04-04 | 2023-05-16 | 滨州市道王动力有限公司 | Battery insulation monitoring circuit of beach vehicle |
| CN117538713A (en) * | 2024-01-10 | 2024-02-09 | 京清数电(北京)技术有限公司 | Energy storage converter, insulation detection circuit, detection method, detection device and medium thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206038771U (en) | Electric automobile insulation resistance detection circuitry | |
| CN103439577B (en) | The insulation resistance detection system of electric automobile power battery and detection method | |
| CN109100618B (en) | High-voltage battery insulation detection system and method | |
| CN207164146U (en) | A kind of insulating resistor detecting circuit of power battery of pure electric automobile | |
| CN206725709U (en) | A kind of off-board charger insulation detection device | |
| CN101609124B (en) | Grounding detecting method of power supply system of train | |
| CN101655523B (en) | Detecting circuit for insulating resistance to ground of power cells | |
| CN207424209U (en) | Insulation detection device, battery management system and the electric vehicle of power battery pack | |
| CN106501611A (en) | Insulation resistance detection method and device | |
| CN104142433A (en) | Active type direct-current system insulation resistor detection method | |
| CN105004979A (en) | System and method for detecting insulation of electric automobile DC charging pile | |
| CN202230137U (en) | Power cell insulation detection system for electric automobile | |
| CN107643447A (en) | A kind of vehicle insulation detecting circuit and method | |
| CN103454498A (en) | Insulation detection method of electric vehicle power battery pack | |
| CN206710509U (en) | A kind of insulation resistance of DC system observation circuit and system | |
| CN101806849B (en) | Fault pole selection method using polar wave waveform area specific value of extra-high voltage direct-current transmission | |
| CN103399571B (en) | For pick-up unit and the method for electric vehicle motor controller high tension loop | |
| CN206074693U (en) | Insulating resistor detecting circuit | |
| CN106053947A (en) | Insulation resistance detection circuit and method of electric automobile power battery, and electric automobile | |
| CN104076207A (en) | Electric vehicle insulation detecting circuit | |
| CN203519737U (en) | Electric vehicle test system possessing scram and insulation protection functions | |
| CN109428369A (en) | Electric vehicle alternating-current charging interface guidance circuit | |
| CN109358225A (en) | A kind of detection device of detection circuit and trolleybus to the earth insulation performance | |
| CN204269735U (en) | A kind of insulation failure detection circuit of electrokinetic cell bag | |
| CN205622257U (en) | Discharge current hardware protection circuit of on -vehicle lithium cell of electric motor car group |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170322 Termination date: 20210823 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |