CN206696376U - Electric automobile high-voltage Insulation Inspection System - Google Patents
Electric automobile high-voltage Insulation Inspection System Download PDFInfo
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- CN206696376U CN206696376U CN201720152232.8U CN201720152232U CN206696376U CN 206696376 U CN206696376 U CN 206696376U CN 201720152232 U CN201720152232 U CN 201720152232U CN 206696376 U CN206696376 U CN 206696376U
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- leakage current
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Abstract
The utility model provides a kind of electric automobile high-voltage Insulation Inspection System, including the first relay, the second relay, voltage acquisition unit, AD conversion unit, CPU, leakage current sensor, leakage current collection conditioning unit, alarm.The utility model is by using the method for obtaining insulaion resistance resistance and leakage current value simultaneously; the measurement that two kinds of detection state of insulations combine is realized, ensure that the degree of accuracy of measurement, while prevent measuring apparatus from breaking down; multiple protective is realized, makes measurement more safe and effective.
Description
Technical field
Electronic technology field is the utility model is related to, more particularly to a kind of electric automobile high-voltage Insulation Inspection System.
Background technology
Electric automobile is the environment friendly and pollution-free vehicles of new energy that current country supports energetically, electric automobile it is a large amount of
Also arisen at the historic moment using its related corollary equipment is caused.Wherein, the supporting detection device of security is electric automobile with being arranged
Most important equipment in standby.The battery voltage of electric automobile is up to several hectovolts, exceeds well over 36 volts of the safe voltage of human body, electronic
Then directly or indirectly parallel connection on the battery pack, if leaked electricity, to the very harmful of personnel, therefore will be protected electrical equipment on automobile
Demonstrate,prove the good insulation properties of electrical equipment and circuit.
Influenceing the factor of electric insulation has a lot, as aging can cause the rupture of line insulation layer, attachment greasy dirt and dust
The spilling of corrosive liquids in electric conductivity, air humidity, the line short of electrical equipment, artificial maloperation factor, impact, battery
Situations such as, it is likely to reduce electrical insulation properties.In these cases, will be to occupant if can not find in time
Cause danger.Therefore, it is necessary to which the high-voltage isulation situation to electric automobile detects, so as to ensure the safety of occupant.
The circuit structure of existing high-voltage isulation detection device is complicated, cost is high, have can not effectively monitor battery in real time
The change of the insulating properties of group, or the source of Insulation monitoring are few, and utilization rate is not also very high, it is necessary to install polylith Insulation monitoring
Module so that cost increase, and complex circuit, the load increase of central control management system, and processing can be caused
Not in time, integration degree reduces.
Therefore, it is necessary to which a kind of circuit structure is simple, cost is relatively low, integration degree is higher, and multiple measurement can be also realized,
The high-voltage isulation detecting system of multiple protective.
Utility model content
Technical problem to be solved in the utility model is to provide that a kind of circuit structure is simple, cost is relatively low, integrated journey
Degree is higher, and can also realize multiple measurement, the high-voltage isulation detecting system of multiple protective.
In order to solve the above problems, the utility model discloses a kind of electric automobile high-voltage Insulation Inspection System, including
One relay, the second relay, voltage acquisition unit, AD conversion unit, CPU, leakage current sensor, leakage current collection conditioning are single
Member, alarm, wherein, the input of the first relay and the positive output line road of battery pack connect, the output of the first relay
End is connected with CPU signal input part；The input of second relay and the negative output line road of battery pack connect, the second relay
The output end of device and CPU signal input part connect；The input of voltage acquisition conditioning unit is defeated with the positive pole of battery pack respectively
Go out circuit and the connection of negative output line road, output end are connected with the input of AD conversion unit；The output end of AD conversion unit
It is connected with CPU；Leakage current sensor is sheathed on the outside of the positive output line road and negative output line road of battery pack；Leakage current is adopted
The output end of the input and leakage current sensor that collect conditioning unit is connected, and output end is connected with AD conversion unit；Alarm with
CPU connections.
Further, electric automobile high-voltage Insulation Inspection System also includes the CAN communication unit being connected with CPU.
Compared with prior art, the utility model includes advantages below：
By using the method for obtaining insulaion resistance resistance and leakage current value simultaneously, two kinds of detection state of insulations are realized
With reference to measurement, ensure that the degree of accuracy of measurement, while prevent measuring apparatus from breaking down, realize multiple protective, make measurement
It is more safe and effective.
Brief description of the drawings
Fig. 1 is a kind of electric automobile high-voltage Insulation Inspection System structural representation according to the utility model embodiment.
Embodiment
To enable above-mentioned purpose of the present utility model, feature and advantage more obvious understandable, below in conjunction with the accompanying drawings and tool
The present invention is further detailed explanation for body embodiment.
Fig. 1 is a kind of electric automobile high-voltage Insulation Inspection System structural representation according to the utility model embodiment.Such as
Shown in Fig. 1, electric automobile high-voltage Insulation Inspection System include the first relay 11, the second relay 12, voltage acquisition unit 13,
AD conversion unit 14, CPU 15, leakage current sensor 17, leakage current collection conditioning unit 18, alarm 19.
Wherein, the output end of the first relay 11 is connected with the positive output line road of battery pack 21, the first relay 11
Input is connected with CPU 15 signal output part；The output end of second relay 11 connects with the negative output line road of battery pack 21
Connect, the input of the second relay 12 is connected with CPU 15 signal output part.The input of voltage acquisition unit 13 respectively with
The positive output line road of battery pack 21 and the connection of negative output line road, output end are connected with the input of AD conversion unit 14；
The output end of AD conversion unit 14 is connected with CPU 15；Leakage current sensor 17 be sheathed on the positive output line road of battery pack 21 with
And on the outside of negative output line road, i.e., the positive output line road of battery pack 21 and negative output line road are from leakage current sensor 17
Pass through；The input of leakage current collection conditioning unit 18 is connected with the output end of leakage current sensor 17, output end and AD conversion
Unit 14 connects；Alarm 19 is connected with CPU 15.
In detection process, the first relay 11, the second relay 12 close successively according to default trigger signal in CPU 15
Close, voltage acquisition unit obtain respectively the first relay 11 in special time period, the second relay 12 disconnect when battery pack 21 just
The first cathode voltage value, first negative battery voltage on the negative output line road of battery pack 21 of pole outlet line, the first relay 11
The second cathode voltage value on positive output line road during closure, and when the second relay 12 closes negative output line road it is second negative
Pole tension value.Special time period can sets itself as needed, in the present embodiment special time period include the first relay
11st, the second relay is 12 all off, the first relay 11 individually closure, the second relay 12 individually required for closure when
Between.
AD conversion unit 14 is by the first cathode voltage value, the second cathode voltage value, the first negative battery voltage, the second negative electricity
Pressure value is converted into the digital quantity signal that CPU 15 can be identified, the algorithm being internally embedded by CPU 15 obtains battery electrode pair
The insulaion resistance R1 and battery anode on shell ground are judged according to the size of R1 and R2 value the insulaion resistance R2 on shell ground
Whether leak electricity.In the ideal situation, R1 and R2 value is equal, but in the high tension loop of reality, R1 and R2 value are
It is unequal, especially when breaking down, so in the state of two values are unequal in reality, the insulated electro in whole loop
Resistance is exactly that minimum in R1 and R2, because insulaion resistance is smaller, wherein the leakage current flowed through will be bigger, will more be held
Easily cause electric leakage, its harm possibility to passenger is bigger.I.e. as R1 ＞ R2, then it is R2 to select insulaion resistance；Otherwise, then select
Insulaion resistance is R1.With reference to country for electric automobile insulation safety standard, it is specified that the minimum of the insulaion resistance of high-tension circuit
Value is 100 Ω/V, and the external circuit between high-tension circuit and ground that people or object are formed, leakage current must not exceed 2mA, so
100 Ω of insulaion resistance/V is a Reflector.When insulaion resistance resistance is less than 100 Ω/V, judge that there is electric leakage harm peace
Full situation.
CPU 15 constantly sends enabling signal, then can constantly obtains insulaion resistance resistance.
Meanwhile leakage current sensor 17 is additionally provided with system, leakage current sensor 17 is sheathed on the positive pole of battery pack 21
On the outside of outlet line and negative output line road, i.e. the positive output line road of battery pack 21 and negative output line road is from leakage current
Passed through in sensor 17；Leakage current collection conditioning unit 18 is used to, by leakage data filtering and noise reduction, AD conversion is delivered to after conditioning
Unit 14 carries out analog-to-digital conversion, and the input of leakage current collection conditioning unit 18 is connected with the output end of leakage current sensor 17,
Output end is connected with AD conversion unit 14, and precision is high.AD conversion unit 14 obtains leakage current signal, and being converted to CPU 15 can know
Other digital quantity signal is sent to CPU 15, is then calculated by algorithm process, and CPU15, which is obtained, flows through leakage current sensor 17
Leakage current value.
In the case of preferable good insulation, the equal in magnitude of the electric current of leakage current sensor 17 is flowed through, it is in the opposite direction, then defeated
Go out signal close to zero；Poor stream is just had when there is insulation fault, on leakage current sensor 17 to flow through, leakage current sensor 17
Output is not zero.CPU 15 obtains leakage current by the output signal of leakage current sensor 17, to judge whether to insulate.
With reference to country for the insulation safety standard of electric automobile, it is specified that between the high-tension circuit and ground that high-tension electricity passerby or object are formed
External circuit leakage current must not exceed 2mA.Then when leakage current is more than 2mA, judgement has drain conditions.
Algorithm embedded CPU 15 obtains insulaion resistance resistance and leakage current value respectively, is leaked according to the two value comprehensive descisions
Electric situation, such as when the algorithms embedded of CPU 15 judge that insulaion resistance resistance is less than 100 Ω/V or leakage current more than 2mA,
Then judge the drain conditions with serious harm safety.
By using the method for obtaining ohmic leakage resistance and leakage current value simultaneously, multiple measurement is realized, ensure that survey
The degree of accuracy of amount, while prevent measuring apparatus from breaking down, multiple protective is realized, makes measurement more safe and effective.
When CPU15 has drain conditions by the insulaion resistance resistance of acquisition with leakage current value comprehensive descision, start with
The alarm 19 of the connections of CPU 15 is alarmed.
Wherein, the electric automobile high-voltage Insulation Inspection System in the present embodiment also includes CAN communication unit 16, CAN communication
Unit 16 respectively with CPU 15 and the two-way communication link of entire car controller 31.CPU15 is by the insulating resistance value got and leakage
Current value is sent to entire car controller 31 by CAN communication unit 16.Entire car controller 31 can be according to insulating resistance value and leakage
Current value is further processed, and is such as sent to during liquid crystal display is shown and is shown, so as to intuitively see very much test position
Numerical value, more hommization, management is more convenient.Or the connection of battery and other devices is cut off by entire car controller 31
Deng.
A kind of electric automobile high-voltage Insulation Inspection System provided by the utility model is described in detail above, herein
In apply specific case principle of the present utility model and embodiment be set forth, the explanation of above example is simply used
Understand method and its core concept of the present utility model in help；Meanwhile for those of ordinary skill in the art, according to this hair
Bright thought, there will be changes in specific embodiments and applications, in summary, this specification content should not manage
Solve as to limitation of the present utility model.
Claims (2)
1. a kind of electric automobile high-voltage Insulation Inspection System, it is characterised in that including the first relay, the second relay, voltage
Collecting unit, AD conversion unit, CPU, leakage current sensor, leakage current collection conditioning unit, alarm, wherein,
The positive output line road of the input of first relay and battery pack connects, the output end of first relay with
The signal input part connection of the CPU；
The input of second relay is connected with the negative output line road of the battery pack, the output of second relay
End is connected with the signal input part of the CPU；
The input of the voltage acquisition unit is defeated with the positive output line road of the battery pack and the negative pole respectively
Go out connection, output end is connected with the input of the AD conversion unit；
The output end of the AD conversion unit is connected with the CPU；
The leakage current sensor is sheathed on outside the positive output line road and the negative output line road of the battery pack
Side；
The input of leakage current collection conditioning unit is connected with the output end of the leakage current sensor, output end with it is described
AD conversion unit connects；
The alarm is connected with the CPU.
2. electric automobile high-voltage Insulation Inspection System according to claim 1, it is characterised in that the electric automobile high-voltage
Insulation Inspection System also includes the CAN communication unit being connected with the CPU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720152232.8U CN206696376U (en) | 2017-02-13 | 2017-02-13 | Electric automobile high-voltage Insulation Inspection System |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720152232.8U CN206696376U (en) | 2017-02-13 | 2017-02-13 | Electric automobile high-voltage Insulation Inspection System |
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| CN206696376U true CN206696376U (en) | 2017-12-01 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111398836A (en) * | 2020-04-26 | 2020-07-10 | 东风汽车集团有限公司 | Integrated power battery high-voltage detection system and insulation verification method thereof |
| CN112557853A (en) * | 2020-12-19 | 2021-03-26 | 哈尔滨恒达交通设备技术开发有限公司 | Compound intelligent insulation detector for railway carriage |
| CN115166432A (en) * | 2022-06-28 | 2022-10-11 | 肇庆小鹏汽车有限公司 | Automobile high-voltage power supply loop insulation detection method, circuit and system and automobile |
-
2017
- 2017-02-13 CN CN201720152232.8U patent/CN206696376U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111398836A (en) * | 2020-04-26 | 2020-07-10 | 东风汽车集团有限公司 | Integrated power battery high-voltage detection system and insulation verification method thereof |
| CN112557853A (en) * | 2020-12-19 | 2021-03-26 | 哈尔滨恒达交通设备技术开发有限公司 | Compound intelligent insulation detector for railway carriage |
| CN112557853B (en) * | 2020-12-19 | 2023-05-30 | 哈尔滨恒达交通设备技术开发有限公司 | Composite intelligent insulation detector for railway carriage |
| CN115166432A (en) * | 2022-06-28 | 2022-10-11 | 肇庆小鹏汽车有限公司 | Automobile high-voltage power supply loop insulation detection method, circuit and system and automobile |
| CN115166432B (en) * | 2022-06-28 | 2024-03-08 | 肇庆小鹏汽车有限公司 | Method, circuit and system for detecting insulation of high-voltage power supply loop of automobile and automobile |
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