CN105527535A - DC leakage insulation detection system and method based on variable-resistor network - Google Patents
DC leakage insulation detection system and method based on variable-resistor network Download PDFInfo
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- CN105527535A CN105527535A CN201610013890.9A CN201610013890A CN105527535A CN 105527535 A CN105527535 A CN 105527535A CN 201610013890 A CN201610013890 A CN 201610013890A CN 105527535 A CN105527535 A CN 105527535A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/3644—Constructional arrangements
- G01R31/3647—Constructional arrangements for determining the ability of a battery to perform a critical function, e.g. cranking
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- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention belongs to the technical field of insulation detection of a power battery system and an energy storage battery system and specifically relates to a DC leakage insulation detection system and method based on a variable-resistor network. The DC leakage insulation detection system based on the variable-resistor network comprises a to-be-detected leakage resistor circuit connected in series between a battery system and the ground; a voltage division and sampling circuit connected in parallel with the to-be-detected leakage resistor circuit; a sampling unit connected with the voltage division and sampling circuit; and a control unit connected with the sampling unit. The voltage division and sampling circuit comprises a voltage division resistor unit and a sampling resistor unit, which are connected in series in sequence, and a switch unit for adjusting the resistance of the voltage division resistor unit, wherein the switch unit is controlled by the control unit. The DC leakage insulation detection system based on the variable-resistor network can realize the variable resistor network, can ensure high-precision detection capability for severe electric leakage and slight electric leakage simultaneously, provides more reliable detection data for the battery system and improves safety.
Description
Technical field
The invention belongs to the technical field of insulation detection of electrokinetic cell system, energy storage battery system, be specifically related to the DC leakage Insulation Inspection System based on variable-resistor network and method.
Background technology
Electric automobile comprises multiple High-Voltage Electrical Appliances parts, such as electrokinetic cell, motor, Vehicular charger, DC/DC etc.Due to working environment etc. severe in the humidity of air, the aging of insulating medium and car, all may cause the aging of insulating material or damage, and then causing the serviceability of electrokinetic cell system to reduce, time situation is serious, going back the safety of entail dangers to occupant.
Existing resistor network detection technique is the principle based on fixed resistance dividing potential drop, and this principle exists the not high enough situation of accuracy of detection, can not ensure that serious drain and slight electric leakage all possess the ability of high precision test simultaneously.
Summary of the invention
In order to overcome the shortcoming of prior art with not enough, primary and foremost purpose of the present invention is to provide a kind of DC leakage Insulation Inspection System based on variable-resistor network, it is variable that this system can realize Insulation monitoring resistor network, high precision test ability when serious drain and slight electric leakage can be ensured simultaneously, detect data more reliably for battery system provides, promote the security of battery system.
Object of the present invention is achieved through the following technical solutions:
Based on the DC leakage Insulation Inspection System of variable-resistor network, comprising: be serially connected in the leak resistance circuit to be checked between battery system and ground;
The pressure sampling circuit be connected with leak resistance circuit in parallel to be checked;
The sampling unit be connected with pressure sampling circuit;
The control module be connected with sampling unit;
Wherein, pressure sampling circuit comprises the divider resistance unit and sampling resistor unit that are sequentially connected in series, and also comprise the switch element for regulating divider resistance unit resistance, described switch element is controlled by control module.
As optimal way, described divider resistance unit comprises more than one divider resistance be connected in series.
As optimal way, described leak resistance circuit to be checked comprises the first leak resistance Rp to be measured be connected between battery system positive terminal and ground and the second leak resistance Rn to be measured be connected between battery system negative pole end and ground.
As optimal way, pressure sampling circuit comprises the first dividing potential drop sampling module and the second dividing potential drop sampling module, described first dividing potential drop sampling module and the first leak resistance Rp to be measured are connected in parallel, and described second dividing potential drop sampling module and the second leak resistance Rn to be measured are connected in parallel;
Described first dividing potential drop sampling module comprises the first divider resistance and the first sampling resistor that are sequentially connected in series, the two ends of described first sampling resistor are connected with sampling unit as voltage sample point, also comprise the first switch for regulating the first divider resistance resistance, described first switch is controlled by control module;
Described second dividing potential drop sampling module comprises the second divider resistance and the second sampling resistor that are sequentially connected in series, the two ends of described second sampling resistor are connected with sampling unit as voltage sample point, also comprise the second switch for regulating the second divider resistance unit resistance, described second switch is controlled by control module.
As preferably, described first divider resistance comprises the first resistance, the second resistance that are sequentially connected in series, described first switch and the first resistance or the second resistor coupled in parallel.
As preferably, described second divider resistance comprises the 4th resistance, the 5th resistance that are sequentially connected in series, described second switch and the 3rd resistance or the 4th resistor coupled in parallel.
Another object of the present invention is to provide a kind of adopts the above-mentioned DC leakage Insulation Inspection System based on variable-resistor network to carry out the method for Insulation monitoring, said method comprising the steps of:
(1) gathered the voltage of sampling resistor unit by sampling unit, and be input to control module;
(2) control module judges that whether the voltage of sampling resistor unit is lower than the electrical leakage voltage threshold value preset;
(3) if the voltage of sampling resistor unit is lower than the electrical leakage voltage threshold value preset, then the duty of control module adjustment switch element, reduces the resistance of divider resistance unit.
When leak resistance circuit to be checked is in serious drain, the equivalent resistance of the leak resistance in leak resistance circuit to be checked is low, and the voltage of sampling resistor unit is lower, causes the sampled signal voltage of sampling unit less, under intrinsic sampling rate and sampling precision, accuracy of detection is had a strong impact on.Now, the sampled voltage gauge tap unit that control module inputs according to pressure sampling circuit closes, and reduces the resistance of divider resistance unit, thus the voltage of sampling resistor unit is increased, thus the sampled voltage of Input Control Element increases, and then ensure good acquisition precision.
As optimal way, if the voltage of sampling resistor unit is lower than the electrical leakage voltage threshold value preset, then control module Closing Switch unit, reduces the number of the divider resistance of access, to reduce the resistance of divider resistance unit.
The present invention has following advantage and effect relative to prior art: it is variable that described variable-resistor network DC leakage type insulation monitoring system can realize insulating monitoring resistor network, the high precision test ability of serious drain and slight electric leakage can be ensured simultaneously, what provide for battery system detects data more reliably, promotes the security of battery system.
Accompanying drawing explanation
Fig. 1 is the structural representation of variable-resistor network DC leakage type insulation monitoring system described in embodiment 1.
Fig. 2 is the process flow diagram of insulation detecting method described in embodiment 2.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment 1
As shown in Figure 1, a kind of DC leakage Insulation Inspection System based on variable-resistor network, comprising:
Be serially connected in the leak resistance circuit 2 to be checked between battery system 1 and ground;
The pressure sampling circuit 3 be connected in parallel with leak resistance circuit 2 to be checked;
The sampling unit 4 be connected with pressure sampling circuit 3;
The control module 5 be connected with sampling unit 4;
Wherein, pressure sampling circuit comprises the divider resistance unit and sampling resistor unit that are sequentially connected in series, and also comprise the switch element for regulating divider resistance unit resistance, described switch element is controlled by control module 5.
Concrete:
Described leak resistance circuit 2 to be checked comprises the first leak resistance Rp to be measured be connected between battery system 1 positive terminal and ground and the second leak resistance Rn to be measured be connected between battery system 1 negative pole end and ground.
Described pressure sampling circuit 3 comprises the first dividing potential drop sampling module and the second dividing potential drop sampling module.Described first dividing potential drop sampling module and the first leak resistance Rp to be measured are connected in parallel, and described second dividing potential drop sampling module and the second leak resistance Rn to be measured are connected in parallel; Described first dividing potential drop sampling module comprises the first divider resistance 6 and the first sampling resistor R11 be sequentially connected in series, the two ends of described first sampling resistor R11 are connected with sampling unit 4 as voltage sample point, also comprise the first switch S 1 for regulating the first divider resistance 6 resistance, described first switch S 1 is controlled by control module 5;
Described second dividing potential drop sampling module comprises the second divider resistance 7 and the second sampling resistor R12 be sequentially connected in series, the two ends of described second sampling resistor R12 are connected with sampling unit 4 as voltage sample point, also comprise the second switch S2 for regulating the second divider resistance 7 unit resistance, described second switch S2 is controlled by control module 5.
Described first divider resistance 6 comprises the first resistance R1, the second resistance R2 that are sequentially connected in series, and described first switch S 1 is in parallel with the first resistance R1 or the second resistance R2.
Described second divider resistance 7 comprises the 3rd resistance R3, the 4th resistance R4 that are sequentially connected in series, and described second switch S2 is in parallel with the 3rd resistance R3 or the 4th resistance R4.
In the present embodiment, sampling unit adopts analog to digital converter (ADC), and control module is single-chip microcomputer (MCU).
Embodiment 2
As shown in Figure 2, adopt the method for carrying out Insulation monitoring described in embodiment 1 based on the DC leakage Insulation Inspection System of variable-resistor network, said method comprising the steps of:
(1) gathered the voltage of sampling resistor unit by sampling unit, and be input to control module;
(2) control module judges that whether the voltage of sampling resistor unit is lower than the electrical leakage voltage threshold value preset;
(3) if the voltage of sampling resistor unit is lower than the electrical leakage voltage threshold value preset, then the duty of control module adjustment switch element, reduces the resistance of divider resistance unit.
When leak resistance circuit to be checked is in serious drain, the equivalent resistance of the leak resistance in leak resistance circuit to be checked is low, and the voltage of sampling resistor unit is lower, causes the sampled signal voltage of sampling unit less, under intrinsic sampling rate and sampling precision, accuracy of detection is had a strong impact on.Now, the sampled voltage gauge tap unit that control module inputs according to pressure sampling circuit closes, and reduces the resistance of divider resistance unit, thus the voltage of sampling resistor unit is increased, thus the sampled voltage of Input Control Element increases, and then ensure good acquisition precision.
If the voltage of sampling resistor unit is lower than the electrical leakage voltage threshold value preset, then control module Closing Switch unit, reduce the number of the divider resistance of access, to reduce the resistance of divider resistance unit.
Above-described embodiment is the present invention's preferably embodiment; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (9)
1. based on a DC leakage Insulation Inspection System for variable-resistor network, comprising: be serially connected in the leak resistance circuit to be checked between battery system and ground;
The pressure sampling circuit be connected with leak resistance circuit in parallel to be checked;
The sampling unit be connected with pressure sampling circuit;
The control module be connected with sampling unit;
Wherein, pressure sampling circuit comprises the divider resistance unit and sampling resistor unit that are sequentially connected in series, and also comprise the switch element for regulating divider resistance unit resistance, described switch element is controlled by control module.
2. the DC leakage Insulation Inspection System based on variable-resistor network according to claim 1, is characterized in that: described divider resistance unit comprises more than one divider resistance be connected in series.
3. the DC leakage Insulation Inspection System based on variable-resistor network according to claim 1, is characterized in that: described leak resistance circuit to be checked comprises the first leak resistance Rp to be measured be connected between battery system positive terminal and ground and the second leak resistance Rn to be measured be connected between battery system negative pole end and ground.
4. the DC leakage Insulation Inspection System based on variable-resistor network according to claim 1, it is characterized in that: pressure sampling circuit comprises the first dividing potential drop sampling module and the second dividing potential drop sampling module, described first dividing potential drop sampling module and the first leak resistance Rp to be measured are connected in parallel, and described second dividing potential drop sampling module and the second leak resistance Rn to be measured are connected in parallel.
5. the DC leakage Insulation Inspection System based on variable-resistor network according to claim 4, it is characterized in that: described first dividing potential drop sampling module comprises the first divider resistance and the first sampling resistor that are sequentially connected in series, the two ends of described first sampling resistor are connected with sampling unit as voltage sample point, also comprise the first switch for regulating the first divider resistance resistance, described first switch is controlled by control module;
Described second dividing potential drop sampling module comprises the second divider resistance and the second sampling resistor that are sequentially connected in series, the two ends of described second sampling resistor are connected with sampling unit as voltage sample point, also comprise the second switch for regulating the second divider resistance unit resistance, described second switch is controlled by control module.
6. the DC leakage Insulation Inspection System based on variable-resistor network according to claim 5, it is characterized in that: described first divider resistance comprises the first resistance, the second resistance that are sequentially connected in series, described first switch and the first resistance or the second resistor coupled in parallel.
7. the DC leakage Insulation Inspection System based on variable-resistor network according to claim 5, it is characterized in that: described second divider resistance comprises the 4th resistance, the 5th resistance that are sequentially connected in series, described second switch and the 3rd resistance or the 4th resistor coupled in parallel.
8. adopt a method of carrying out Insulation monitoring described in any one of claim 1-7 based on the DC leakage Insulation Inspection System of variable-resistor network, it is characterized in that, comprise the steps:
(1) gathered the voltage of sampling resistor unit by sampling unit, and be input to control module;
(2) control module judges that whether the voltage of sampling resistor unit is lower than the electrical leakage voltage threshold value preset;
(3) if the voltage of sampling resistor unit is lower than the electrical leakage voltage threshold value preset, then the duty of control module adjustment switch element, reduces the resistance of divider resistance unit.
9. the method for Insulation monitoring according to claim 8, it is characterized in that: if the voltage of sampling resistor unit is lower than the electrical leakage voltage threshold value preset, then control module Closing Switch unit, reduces the number of the divider resistance of access, to reduce the resistance of divider resistance unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610013890.9A CN105527535A (en) | 2016-01-05 | 2016-01-05 | DC leakage insulation detection system and method based on variable-resistor network |
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| CN201610013890.9A CN105527535A (en) | 2016-01-05 | 2016-01-05 | DC leakage insulation detection system and method based on variable-resistor network |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106405249A (en) * | 2016-06-24 | 2017-02-15 | 东莞钜威动力技术有限公司 | Detection circuit and detection method for detecting insulation resistance of electric vehicle |
| CN107271788A (en) * | 2017-06-15 | 2017-10-20 | 湖北航天技术研究院总体设计所 | A kind of direct-current power ground insulation resistance rapid measurement device and method |
| 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 |
| CN110361669A (en) * | 2018-03-26 | 2019-10-22 | 株式会社京滨 | Deterioration of battery decision maker |
| CN111896854A (en) * | 2020-06-28 | 2020-11-06 | 杭州中恒电气股份有限公司 | Switching circuit and direct current system insulation detection device and method |
| CN113740686A (en) * | 2021-09-30 | 2021-12-03 | 蜂巢能源科技有限公司 | Insulation detection circuit and resistance value detection method based on insulation detection circuit |
| CN114498564A (en) * | 2022-01-25 | 2022-05-13 | 东风商用车有限公司 | Protection circuit and method of vehicle-mounted inverter |
| CN114994388A (en) * | 2022-05-25 | 2022-09-02 | 北京中联太信科技有限公司 | Method and system for magnetic superconducting micro-direct current detection and analysis |
| WO2023223698A1 (en) * | 2022-05-20 | 2023-11-23 | パナソニックＩｐマネジメント株式会社 | Insulation resistance detection device and insulation resistance detection method |
| CN117647676A (en) * | 2024-01-26 | 2024-03-05 | 永联科技(常熟)有限公司 | Insulation resistance detection circuit and detection method |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106405249A (en) * | 2016-06-24 | 2017-02-15 | 东莞钜威动力技术有限公司 | Detection circuit and detection method for detecting insulation resistance of electric vehicle |
| CN107271788A (en) * | 2017-06-15 | 2017-10-20 | 湖北航天技术研究院总体设计所 | A kind of direct-current power ground insulation resistance rapid measurement device and method |
| CN107271788B (en) * | 2017-06-15 | 2020-01-03 | 湖北航天技术研究院总体设计所 | Device and method for rapidly measuring insulation resistance of direct current power supply to ground |
| 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 |
| CN110361669B (en) * | 2018-03-26 | 2023-11-03 | 日立安斯泰莫株式会社 | Battery degradation determination device |
| CN110361669A (en) * | 2018-03-26 | 2019-10-22 | 株式会社京滨 | Deterioration of battery decision maker |
| CN111896854A (en) * | 2020-06-28 | 2020-11-06 | 杭州中恒电气股份有限公司 | Switching circuit and direct current system insulation detection device and method |
| CN113740686A (en) * | 2021-09-30 | 2021-12-03 | 蜂巢能源科技有限公司 | Insulation detection circuit and resistance value detection method based on insulation detection circuit |
| CN114498564A (en) * | 2022-01-25 | 2022-05-13 | 东风商用车有限公司 | Protection circuit and method of vehicle-mounted inverter |
| CN114498564B (en) * | 2022-01-25 | 2024-04-05 | 东风商用车有限公司 | Protection circuit and method for vehicle-mounted inverter |
| WO2023223698A1 (en) * | 2022-05-20 | 2023-11-23 | パナソニックＩｐマネジメント株式会社 | Insulation resistance detection device and insulation resistance detection method |
| CN114994388A (en) * | 2022-05-25 | 2022-09-02 | 北京中联太信科技有限公司 | Method and system for magnetic superconducting micro-direct current detection and analysis |
| CN114994388B (en) * | 2022-05-25 | 2023-05-12 | 北京中联太信科技有限公司 | Method and system for detecting and analyzing magnetic superconducting micro direct current |
| CN117647676A (en) * | 2024-01-26 | 2024-03-05 | 永联科技(常熟)有限公司 | Insulation resistance detection circuit and detection method |
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Application publication date: 20160427 |
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