CN203881913U - An electric automobile insulation test system based on multiple points - Google Patents
An electric automobile insulation test system based on multiple points Download PDFInfo
- Publication number
- CN203881913U CN203881913U CN201420298359.7U CN201420298359U CN203881913U CN 203881913 U CN203881913 U CN 203881913U CN 201420298359 U CN201420298359 U CN 201420298359U CN 203881913 U CN203881913 U CN 203881913U
- Authority
- CN
- China
- Prior art keywords
- commutation circuit
- electrokinetic cell
- monitoring point
- negative electrode
- voltage
- 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
- Tests Of Electric Status Of Batteries (AREA)
Abstract
The utility model discloses an electric automobile insulation test system based on multiple points. A circuit of the test system comprises a power battery, a battery voltage sampling circuit, a multipath voltage switching circuit and isolation amplifier unit, a voltage measurement and controller unit, a multiple monitoring point switching circuit and k equivalent insulation resistor sets of an anode and a cathode for each monitoring portion; the k represents a positive integer greater than 1 or equal to 1; insulation conditions of each tested portion and the power battery can be separately obtained through detection and calculating. The electric automobile insulation test system based on the multiple points of the utility model is simple in circuit and low in cost; in a condition that an AD of 12 bits or more that 12 bits are selected, the measurement precision is higher than 2.5%; insulation conditions of the electric automobile power battery for each monitoring point can be measured at will; and safe operation of an electric automobile can be guaranteed.
Description
Technical field
The utility model relates to electric automobile insulation monitoring technical field, is that a kind of power battery insulation performance for electric automobile safe operation detects.
Background technology
Development along with electric automobile industry, in order to improve power performance and the capacity usage ratio of electric automobile, also in order to reach certain power requirement, electric automobile usually uses multiple batteries series connection, between battery and chassis, may occur Insulation Problems simultaneously.And, along with the voltage of electrokinetic cell is more and more higher, in order to improve the performance of electric automobile, by tens volts of original relative broad ranges that risen to 90 present～500V.So, in the middle of the actual motion of automobile, due to the complexity of working environment, vibrations, temperature and humidity sharply changes, and the reasons such as the corrosion of Acid-base Gas all can cause the damage and fracture of insulation, make the decreasing insulating of electric automobile.The in the situation that of insulation fault, be easy to cause the security incidents such as spontaneous combustion, jeopardize occupant's personal safety.Based on this, study a kind of efficient, low-cost, multiple spot detects electric automobile insulating performance, guarantees passenger safety in real time, electrical equipment is normally worked and vehicle safety operation is significant.
At present, conventional electric automobile power battery insulating monitoring circuit generally adopts balanced bridge method, injecting signal etc.Wherein balanced bridge method bridge diagram degree of accuracy is required very high, and can not Measurement accuracy in the situation that both positive and negative polarity insulation declines simultaneously; And injecting signal not only can make straight-flow system ripple increase, affect power supply quality, and the distributed capacitance of system directly affects measurement result, cause measuring accuracy to decline, circuit complexity simultaneously, cost is high again.In addition, adopt in the patented technology of said method, only measure battery plus-negative plate comprehensive to the inadequate science of the insulating property of automobile chassis, in fact, except electrokinetic cell to outside causing damage chassis electric leakage, electrokinetic cell lead-in wire equally causes very large harm to the electric leakage in other place, so multimetering is necessary.
Summary of the invention
For deficiency of the prior art, the utility model provides a kind of electric automobile insulation test macro based on multiple spot.The technical solution of the utility model realizes in the following manner: test macro comprises anode and the resistor group of negative electrode to the equivalence insulation of k monitoring point of electrokinetic cell, cell voltage sample circuit, plurality of voltages commutation circuit and isolated amplifier unit, voltage measurement and controller unit, many monitoring points commutation circuit, electrokinetic cell, and k representative is greater than 1 positive integer that equals 1.Described cell voltage sample circuit is for measuring in real time cell voltage, described plurality of voltages commutation circuit and isolated amplifier unit are for optionally measuring electrokinetic cell anodic sampling voltage Vp, electrokinetic cell negative electrode sampling voltage Vn or electrokinetic cell sampling voltage Ve, described voltage measurement and controller unit are for controlling the folding of respective switch, the switching of monitoring point, and the anode of described many monitoring points commutation circuit and electrokinetic cell and negative electrode are used for realizing many monitoring points measurement function to the equivalent insulation resistance group of k monitoring point.Described plurality of voltages commutation circuit and isolated amplifier unit comprise cell voltage sampling end, electrokinetic cell anodic sampling end, electrokinetic cell negative electrode sampling end and voltage measurement and controller link, described plurality of voltages commutation circuit is connected with cell voltage sample circuit output terminal with isolated amplifier unit, the anode of described electrokinetic cell and negative electrode comprise the equivalent insulation resistance Rpk of the anode of electrokinetic cell to k monitoring point to the equivalent insulation resistance group of k monitoring point, the negative electrode of electrokinetic cell is to the equivalent insulation resistance Rnk of k monitoring point and k monitoring point, the anode of described electrokinetic cell is connected to the electrokinetic cell anodic sampling end of plurality of voltages commutation circuit and isolated amplifier unit by switch J1 to the equivalent insulation resistance Rpk of k monitoring point, the negative electrode of described electrokinetic cell is connected to the electrokinetic cell negative electrode sampling end of plurality of voltages commutation circuit and isolated amplifier unit by switch J2 to the equivalent insulation resistance Rnk of k monitoring point, described many monitoring points commutation circuit comprises the input point of change-over switch J and k monitoring point commutation circuit, the input point of k monitoring point commutation circuit of described many monitoring points commutation circuit is connected to k monitoring point of the equivalent insulation resistance group of k monitoring point with negative electrode with the anode of corresponding electrokinetic cell respectively, the change-over switch J of described many monitoring points commutation circuit is connected to the electrokinetic cell anodic sampling end of plurality of voltages commutation circuit and isolated amplifier unit by anode sample resistance Rp, the change-over switch J of described many monitoring points commutation circuit is connected to the electrokinetic cell negative electrode sampling end of plurality of voltages commutation circuit and isolated amplifier unit by negative electrode sample resistance Rn, described voltage measurement is connected with controller link with the voltage measurement of isolated amplifier unit with plurality of voltages commutation circuit with controller unit.Described cell voltage sample circuit comprises Hall voltage sensor MK1, resistance R 1, potentiometer W1, resistance R 2 and capacitor C 1, an input end of described Hall voltage sensor MK1 is connected to switch J1 by resistance R 1, another input end of described Hall voltage sensor MK1 is connected to switch J2, the MK1 output head anode of described Hall voltage sensor connects one end of potentiometer W1, the centre tap of described potentiometer W1 and the potentiometer W1 other end, resistance R 2 is connected with capacitor C 1, and resistance R 2 with after capacitor C 1 parallel connection, be connected with the MK1 negative pole of output end of Hall voltage sensor.The change-over switch J of described switch J1, switch J2, many monitoring points commutation circuit adopts relay or light coupling relay.Described plurality of voltages commutation circuit and isolated amplifier unit adopt multichannel analog signals change-over switch and isolated amplifier.Described voltage measurement and controller unit adopt 12 of AD performances and above AD device.
The beneficial effect that the utility model compared with prior art produced is: a kind of electric automobile insulation test macro based on multiple spot the utility model proposes can be realized the measurement of any multiple spot, do not need additional alternating-current measurement power supply, circuit is simple, and cost is low, can data storage.Plurality of voltages commutation circuit and isolated amplifier unit have adopted isolated amplifier, and measuring system and electrokinetic cell are isolated completely, have improved the security performance of automobile.For automobile designers, manufacturer, maintenance personal provide the firsthand data, there is in addition the advantages such as precision is high, practical, practical value is high, cost performance is high, easy popularization.
Accompanying drawing explanation
Accompanying drawing 1 is circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, specific works principle of the present utility model is described: with reference to accompanying drawing, as shown in Figure 1, a kind of electric automobile insulation test macro based on multiple spot, it is characterized in that: test macro comprises anode and the resistor group of negative electrode to the equivalence insulation of k monitoring point of electrokinetic cell, cell voltage sample circuit, plurality of voltages commutation circuit and isolated amplifier unit, voltage measurement and controller unit, many monitoring points commutation circuit, electrokinetic cell, and k representative is greater than 1 positive integer that equals 1.Described cell voltage sample circuit is for measuring in real time cell voltage, described plurality of voltages commutation circuit and isolated amplifier unit are for optionally measuring electrokinetic cell anodic sampling voltage Vp, electrokinetic cell negative electrode sampling voltage Vn or electrokinetic cell sampling voltage Ve, described voltage measurement and controller unit are for controlling the folding of corresponding switch, the switching of monitoring point, and the anode of described many monitoring points commutation circuit and electrokinetic cell and negative electrode are used for realizing many monitoring points measurement function to the equivalent insulation resistance group of k monitoring point.Described plurality of voltages commutation circuit and isolated amplifier unit comprise cell voltage sampling end, electrokinetic cell anodic sampling end, electrokinetic cell negative electrode sampling end and voltage measurement and controller link, described plurality of voltages commutation circuit is connected with cell voltage sample circuit output terminal with isolated amplifier unit, the anode of described electrokinetic cell and negative electrode comprise the equivalent insulation resistance Rpk of the anode of electrokinetic cell to k monitoring point to the equivalent insulation resistance group of k monitoring point, the negative electrode of electrokinetic cell is to the equivalent insulation resistance Rnk of k monitoring point and k monitoring point, the anode of described electrokinetic cell is connected to the electrokinetic cell anodic sampling end of plurality of voltages commutation circuit and isolated amplifier unit by switch J1 to the equivalent insulation resistance Rpk of k monitoring point, the negative electrode of described electrokinetic cell is connected to the electrokinetic cell negative electrode sampling end of plurality of voltages commutation circuit and isolated amplifier unit by switch J2 to the equivalent insulation resistance Rnk of k monitoring point, described many monitoring points commutation circuit comprises the input point of change-over switch J and k monitoring point commutation circuit, the input point of k monitoring point commutation circuit of described many monitoring points commutation circuit is connected to k monitoring point of the equivalent insulation resistance group of k monitoring point with negative electrode with the anode of corresponding electrokinetic cell respectively, the change-over switch J of described many monitoring points commutation circuit is connected to the electrokinetic cell anodic sampling end of plurality of voltages commutation circuit and isolated amplifier unit by anode sample resistance Rp, the change-over switch J of described many monitoring points commutation circuit is connected to the electrokinetic cell negative electrode sampling end of plurality of voltages commutation circuit and isolated amplifier unit by negative electrode sample resistance Rn, described voltage measurement is connected with controller link with the voltage measurement of isolated amplifier unit with plurality of voltages commutation circuit with controller unit.Described cell voltage sample circuit comprises Hall voltage sensor MK1, resistance R 1, potentiometer W1, resistance R 2 and capacitor C 1, an input end of described Hall voltage sensor MK1 is connected to switch J1 by resistance R 1, another input end of described Hall voltage sensor MK1 is connected to switch J2, the MK1 output head anode of described Hall voltage sensor connects one end of potentiometer W1, the centre tap of described potentiometer W1 and the potentiometer W1 other end, resistance R 2 is connected with capacitor C 1, and resistance R 2 with after capacitor C 1 parallel connection, be connected with the MK1 negative pole of output end of Hall voltage sensor.The change-over switch J of described switch J1, switch J2, many monitoring points commutation circuit adopts relay or light coupling relay.Described plurality of voltages commutation circuit and isolated amplifier unit adopt multichannel analog signals change-over switch and isolated amplifier.Described voltage measurement and controller unit adopt 12 of AD performances and above AD device.
Claims (6)
1. the electric automobile insulation test macro based on multiple spot, it is characterized in that: described test macro comprises electrokinetic cell, cell voltage sample circuit, plurality of voltages commutation circuit and isolated amplifier unit, voltage measurement and controller unit, many monitoring points commutation circuit, the anode of electrokinetic cell and the negative electrode resistor group to the equivalence insulation of k monitoring point, k representative is greater than 1 positive integer that equals 1, described cell voltage sample circuit is for measuring in real time cell voltage, described plurality of voltages commutation circuit and isolated amplifier unit are for optionally measuring electrokinetic cell anodic sampling voltage Vp, electrokinetic cell negative electrode sampling voltage Vn or electrokinetic cell sampling voltage Ve, described voltage measurement and controller unit are for controlling the folding of corresponding switch, the switching of monitoring point, the anode of described many monitoring points commutation circuit and electrokinetic cell and negative electrode are used for realizing many monitoring points measurement function to the equivalent insulation resistance group of k monitoring point.
2. a kind of electric automobile insulation test macro based on multiple spot according to claim 1, it is characterized in that: described plurality of voltages commutation circuit and isolated amplifier unit comprise cell voltage sampling end, electrokinetic cell anodic sampling end, electrokinetic cell negative electrode sampling end and voltage measurement and controller link, described plurality of voltages commutation circuit is connected with cell voltage sample circuit output terminal with isolated amplifier unit, the anode of described electrokinetic cell and negative electrode comprise the equivalent insulation resistance Rpk of the anode of electrokinetic cell to k monitoring point to the equivalent insulation resistance group of k monitoring point, the negative electrode of electrokinetic cell is to the equivalent insulation resistance Rnk of k monitoring point and k monitoring point, the anode of described electrokinetic cell is connected to the electrokinetic cell anodic sampling end of plurality of voltages commutation circuit and isolated amplifier unit by switch J1 to the equivalent insulation resistance Rpk of k monitoring point, the negative electrode of described electrokinetic cell is connected to the electrokinetic cell negative electrode sampling end of plurality of voltages commutation circuit and isolated amplifier unit by switch J2 to the equivalent insulation resistance Rnk of k monitoring point, described many monitoring points commutation circuit comprises the input point of change-over switch J and k monitoring point commutation circuit, the input point of k monitoring point commutation circuit of described many monitoring points commutation circuit is connected to k monitoring point of the equivalent insulation resistance group of k monitoring point with negative electrode with the anode of corresponding electrokinetic cell respectively, the change-over switch J of described many monitoring points commutation circuit is connected to the electrokinetic cell anodic sampling end of plurality of voltages commutation circuit and isolated amplifier unit by anode sample resistance Rp, the change-over switch J of described many monitoring points commutation circuit is connected to the electrokinetic cell negative electrode sampling end of plurality of voltages commutation circuit and isolated amplifier unit by negative electrode sample resistance Rn, described voltage measurement is connected with controller link with the voltage measurement of isolated amplifier unit with plurality of voltages commutation circuit with controller unit.
3. a kind of electric automobile insulation test macro based on multiple spot according to claim 2, it is characterized in that: described cell voltage sample circuit comprises Hall voltage sensor MK1, resistance R 1, potentiometer W1, resistance R 2 and capacitor C 1, an input end of described Hall voltage sensor MK1 is connected to switch J1 by resistance R 1, another input end of described Hall voltage sensor MK1 is connected to switch J2, the MK1 output head anode of described Hall voltage sensor connects one end of potentiometer W1, the centre tap of described potentiometer W1 and the potentiometer W1 other end, resistance R 2 is connected with capacitor C 1, and resistance R 2 with after capacitor C 1 parallel connection, be connected with the MK1 negative pole of output end of Hall voltage sensor.
4. a kind of electric automobile insulation test macro based on multiple spot according to claim 2, is characterized in that: the change-over switch J of described switch J1, switch J2, many monitoring points commutation circuit adopts relay or light coupling relay.
5. a kind of electric automobile insulation test macro based on multiple spot according to claim 2, is characterized in that: described plurality of voltages commutation circuit and isolated amplifier unit adopt multichannel analog signals change-over switch and isolated amplifier.
6. according to a kind of electric automobile insulation test macro based on multiple spot described in claims 2, it is characterized in that: described voltage measurement and controller unit adopt 12 of AD performances and above AD device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420298359.7U CN203881913U (en) | 2014-06-06 | 2014-06-06 | An electric automobile insulation test system based on multiple points |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420298359.7U CN203881913U (en) | 2014-06-06 | 2014-06-06 | An electric automobile insulation test system based on multiple points |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203881913U true CN203881913U (en) | 2014-10-15 |
Family
ID=51682397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420298359.7U Expired - Fee Related CN203881913U (en) | 2014-06-06 | 2014-06-06 | An electric automobile insulation test system based on multiple points |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203881913U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104020421A (en) * | 2014-06-06 | 2014-09-03 | 浙江工商职业技术学院 | Multipoint electric automobile insulation test system and detection method thereof |
-
2014
- 2014-06-06 CN CN201420298359.7U patent/CN203881913U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104020421A (en) * | 2014-06-06 | 2014-09-03 | 浙江工商职业技术学院 | Multipoint electric automobile insulation test system and detection method thereof |
| CN104020421B (en) * | 2014-06-06 | 2017-06-16 | 浙江工商职业技术学院 | The electric automobile insulation test system and detection method of a kind of multiple spot |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104020421A (en) | Multipoint electric automobile insulation test system and detection method thereof | |
| CN201886117U (en) | Insulation detection circuit of electrically-propelled vehicle | |
| CN202614852U (en) | Power cell insulation detecting system | |
| CN101655523B (en) | Detecting circuit for insulating resistance to ground of power cells | |
| KR20150052139A (en) | Device for detecting and measuring an insulation fault | |
| JP2013140162A (en) | Insulation resistance measurement circuit | |
| JP2012122856A (en) | Battery pack device | |
| CN103323646B (en) | A kind of current sensor used for electric vehicle and detection method thereof | |
| CN103076497A (en) | Insulation detection method based on low frequency impulse signal injection | |
| US9310442B2 (en) | Battery having cell voltage and battery current detection and comprising only one electrical isolation device | |
| CN105527535A (en) | DC leakage insulation detection system and method based on variable-resistor network | |
| CN103576064A (en) | Insulation detection circuit with calibration module and calibration method thereof | |
| CN105425155A (en) | High-voltage battery pack total voltage and insulation resistance detection circuit and detection method | |
| CN105158632A (en) | Power cell insulation and leakage detection system | |
| CN105092971A (en) | Pure electric high-voltage insulated resistance real-time online detection method | |
| CN108657088B (en) | High-voltage distribution box for electric automobile, electric control system and electric automobile | |
| CN203178367U (en) | Internal resistance measuring circuit of battery capacity grading cabinet | |
| CN203881913U (en) | An electric automobile insulation test system based on multiple points | |
| CN202330670U (en) | Insulation detection circuit for power battery system of electric vehicle | |
| CN205353257U (en) | Insulating detecting system of direct current electric leakage based on adjustable resistance network | |
| CN202512224U (en) | Simulation test system of failure warning | |
| CN209198629U (en) | Electric automobile whole insulated test device based on twin voltage table | |
| CN202393889U (en) | Rapid electric quantity measurement system for electric car | |
| CN208092209U (en) | A kind of power transformation station battery movable type whole group test device | |
| CN104052317A (en) | Voltage simulator of battery of electric vehicle |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141015 Termination date: 20170606 |