CN202119840U - Leakage detection circuit of electric vehicle battery packet - Google Patents
Leakage detection circuit of electric vehicle battery packet Download PDFInfo
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- CN202119840U CN202119840U CN2011201784516U CN201120178451U CN202119840U CN 202119840 U CN202119840 U CN 202119840U CN 2011201784516 U CN2011201784516 U CN 2011201784516U CN 201120178451 U CN201120178451 U CN 201120178451U CN 202119840 U CN202119840 U CN 202119840U
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- leakage detection
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Abstract
A leakage detection circuit of an electric vehicle battery packet includes a signal generation circuit, a power supply for powering the signal generation circuit, a detection resistor, an isolation capacitor and a battery packet. The power supply is connected with the signal generation circuit; the signal generation circuit is respectively connected with the anode or cathode of the battery packet and one end of the detection resistor; and the other end of the detection resistor is connected with the ground (which is a detection point) consequently through the isolation capacitor and a detection port. The disadvantages are overcome that the selection is limited of the detection points in the prior battery packet leakage detection circuit, a long lead is required for connecting a detection port with a detection point, and the detection accuracy of the battery packet leakage detection circuit is influenced. In the leakage detection circuit of the electric vehicle battery packet provided in the utility model, the selection range of the detection points is larger, the lead length between a detection port and a detection point is greatly shortened because of the flexible selection of detection points, the impedance is reduced, and further the detection accuracy of the battery packet leakage detection circuit is enhanced.
Description
Technical field
The utility model belongs to the power brick detection range, is specifically related to a kind of battery of electric vehicle bag electric-leakage detection circuit.
Background technology
Whether battery of electric vehicle bag electric-leakage detection circuit mainly is to be used for detecting the insulation resistance of high-tension battery bag to the earth, and learns the quality of high-tension battery bag to the earth insulativity by the resistance of insulation resistance, promptly leak electricity.As shown in Figure 1; Prior electric car power brick electric-leakage detection circuit comprises power brick 13, low-tension supply 11, signal generating circuit 12, detects resistance R and isolation capacitance C, and said low-tension supply 11 links to each other with the negative or positive electrode of power brick 13 through signal generating circuit 12, detection resistance R, isolation capacitance C, detection port S successively, and said low-tension supply 11 also links to each other with the earth GND; In this circuit; In order to detect power brick 13 insulation resistance over the ground, wherein detection port S links to each other with check point T (this check point T chooses on the negative or positive electrode of power brick 13), like this; On the negative or positive electrode of power brick 13, choosing check point T on the one hand limits to very much; On the other hand, because on power brick 13 negative or positive electrodes, to choose check point T limited, therefore making needs link to each other with long lead between detection port S and the check point T; Yet because thereby the longer impedance of lead is big more, and then to the precision of power brick detection of electrical leakage generation considerable influence.
The utility model content
The utility model is limited for choosing of check point in the existing battery of electric vehicle bag electric-leakage detection circuit of solution; And owing to need between detection port and the check point link to each other with long lead; And then influence the technical matters of battery of electric vehicle bag electric-leakage detection circuit accuracy of detection, provide a kind of detection more accurate battery of electric vehicle bag electric-leakage detection circuit.
The technical scheme of the utility model is:
A kind of battery of electric vehicle bag electric-leakage detection circuit; Comprise signal generating circuit, power supply, detection resistance, isolation capacitance and power brick for the signal generating circuit power supply; Said power supply links to each other with signal generating circuit; Said signal generating circuit also respectively with the negative or positive electrode of power brick, and an end that detects resistance links to each other, the other end of said detection resistance links to each other with the earth with detection port through isolation capacitance successively.
Further, said power supply comprises low-tension supply and isolating transformer, and said low-tension supply links to each other with signal generating circuit through isolating transformer.
Further, said power supply comprises the step-down transformer that links to each other with power brick, and this step-down transformer links to each other with signal generating circuit.
Further, said detection resistance is a resistance.
Further, said detection resistance is connected by at least two resistance or is composed in parallel.
Further, said low-tension supply is an accumulator.
Further, the voltage that provides of said accumulator is 12V.
The advantage of the utility model: can learn from the technique scheme of the utility model; Battery of electric vehicle bag electric-leakage detection circuit comprises signal generating circuit, the power supply for the signal generating circuit power supply, detection resistance, isolation capacitance and power brick; Said power supply links to each other with signal generating circuit; Said signal generating circuit also respectively with the negative or positive electrode of power brick, and an end that detects resistance links to each other, the other end of said detection resistance links to each other with the earth with detection port through isolation capacitance successively.
By on can know, in this battery of electric vehicle bag electric-leakage detection circuit, in order to detect power brick insulation resistance over the ground; Wherein detection port links to each other with check point (this check point is that vehicle body is chosen on the ground at the earth), because any one point can both be as vehicle body ground, promptly as check point on the automobile chassis; Therefore, in the utility model battery of electric vehicle bag electric-leakage detection circuit check point to choose scope bigger, and; Because choosing of check point is more flexible; Thereby just can shorten the lead of joint detection port and check point greatly, can reduce impedance, and then improve the precision of power brick detection of electrical leakage.
Description of drawings
Fig. 1 is the circuit diagram of existing battery of electric vehicle bag electric-leakage detection circuit.
The circuit diagram of the embodiment that Fig. 2 provides for the utility model battery of electric vehicle bag electric-leakage detection circuit.
The circuit diagram of another embodiment that Fig. 3 provides for the utility model battery of electric vehicle bag electric-leakage detection circuit.
Embodiment
Clearer for technical matters, technical scheme and beneficial effect that the utility model is solved, below in conjunction with accompanying drawing and embodiment, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
The utility model is limited in order to solve choosing of check point in the existing battery of electric vehicle bag electric-leakage detection circuit; And owing to need between detection port and the check point link to each other with long lead; And then influence the technical matters of battery of electric vehicle bag electric-leakage detection circuit accuracy of detection; A kind of battery of electric vehicle bag electric-leakage detection circuit is provided; This battery of electric vehicle bag electric-leakage detection circuit comprises signal generating circuit, is the power supply of signal generating circuit power supply, detects resistance, isolation capacitance and power brick, and said power supply links to each other with signal generating circuit, said signal generating circuit also respectively with the negative or positive electrode of power brick; And an end that detects resistance is continuous, and the other end of said detection resistance links to each other with the earth with detection port through isolation capacitance successively.
As a kind of embodiment of the utility model, above-mentioned power supply comprises low-tension supply and isolating transformer, and said low-tension supply links to each other with signal generating circuit through isolating transformer.
As the another kind of embodiment of the utility model, above-mentioned power supply comprises the step-down transformer that links to each other with power brick, and this step-down transformer links to each other with signal generating circuit.
In order to make those skilled in the art can understand the technology contents of the utility model well, specifically set forth through embodiment below.
The circuit diagram of the embodiment that Fig. 2 provides for the utility model battery of electric vehicle bag 22 electric-leakage detection circuits; As shown in Figure 2; Battery of electric vehicle bag 22 electric-leakage detection circuits comprise low-tension supply 23, signal generating circuit 21, detect resistance R, isolation capacitance C, power brick 22 and isolating transformer 24; Said low-tension supply 23 links to each other with signal generating circuit 21 through isolating transformer 24; Said signal generating circuit 21 also respectively with the negative pole of power brick 22; And an end that detects resistance is continuous, and the other end of said detection resistance links to each other with the earth with detection port S through isolation capacitance successively, and wherein insulation resistance Ri is meant the equivalent resistance between 22 couples of the earth GND of power brick.
In this battery of electric vehicle bag electric-leakage detection circuit, in order to detect power brick 22 insulation resistance over the ground, wherein detection port S links to each other with check point T (this check point T is that vehicle body is chosen on the ground at the earth GND); Because any one point can both be as vehicle body ground, promptly as check point T, therefore on the automobile chassis; In the utility model battery of electric vehicle bag electric-leakage detection circuit check point T to choose scope bigger; And,, thereby just can shorten the lead of joint detection port and check point T greatly because choosing of check point T is more flexible; Can reduce impedance, and then improve the precision of power brick detection of electrical leakage.
Among this embodiment, low-tension supply 23 is through signal generating circuit 21 output voltage signal U1, and this voltage signal injects the earth GND (being vehicle body ground) through detecting resistance R and isolation capacitance C.
When insulation resistance just often, Ri is much larger than detecting resistance R, its intrinsic standoff ratio Ri/ (Ri+R) ≈ 1, this moment, the magnitude of voltage of U2 should be approximately equal to U1; When Ri reduced when insulation resistance reduces, its intrinsic standoff ratio Ri/ (Ri+R) reduced, and the magnitude of voltage of U2 is also corresponding to be reduced.Therefore according to insulation resistance Ri allow confirm threshold voltage Ut than limit value and the intrinsic standoff ratio that detects resistance R.< during Ut, then judge insulation resistance Ri, have electric leakage hidden danger this moment when detecting U2 less than limits value.What this need explain be, thereby specifically judge that through the resistance of calculating insulation resistance Ri whether 22 pairs of the earth of power brick leak electricity is the state of the art in this circuit, therefore do not elaborate at this.
Among this embodiment, said detection resistance R is a resistance, but in the practical implementation, said detection resistance R also can or compose in parallel by at least two resistance series connection.
Among this embodiment, signal generating circuit 21 links to each other with the negative pole of high-tension battery bag 22, it is understandable that, signal generating circuit 21 can link to each other with the negative or positive electrode of high-tension battery bag 22.
Be that above-mentioned signal generating circuit 21 is to be used for applying AC signal to being in series with the series circuit that detects resistance R and isolation capacitance C and equivalent insulation resistance Ri what this need explain.Wherein the effect of isolation capacitance C hinders DC voltage, and is that alternating voltage provides guiding path.Because signal generating circuit 21 is existing parts of prior art, therefore be not described in detail at this.
The circuit diagram of another embodiment that Fig. 3 provides for the utility model battery of electric vehicle bag 22 electric-leakage detection circuits; As shown in Figure 3; Battery of electric vehicle bag 22 electric-leakage detection circuits comprise signal generating circuit 21, detect resistance R, isolation capacitance C, power brick 22 and step-down transformer 25; The positive pole of said power brick 22 links to each other with signal generating circuit 21 through step-down transformer 25, said signal generating circuit 21 also respectively with the negative pole of power brick 22, and it is continuous to detect an end of resistance; The other end of said detection resistance links to each other with the earth with detection port S through isolation capacitance successively, and wherein insulation resistance Ri is meant the equivalent resistance between 22 couples of the earth GND of power brick.
Can know by above scheme; This embodiment is respectively two kinds of different embodiments of the utility model battery of electric vehicle bag 22 electric-leakage detection circuits with a last embodiment; This embodiment is identical with the technical scheme major part of a last embodiment; Difference is, through isolating transformer 24 power supplies, and the signal generating circuit 21 of present embodiment is through step-down transformer 25 power supplies by power brick 22 to the signal generating circuit 21 of a last embodiment by low-tension supply 23.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection domain of the utility model.
Claims (7)
1. battery of electric vehicle bag electric-leakage detection circuit; It is characterized in that; Comprise signal generating circuit, be the signal generating circuit power supply power supply, detect resistance, isolation capacitance and power brick, said power supply links to each other with signal generating circuit, said signal generating circuit also respectively with the negative or positive electrode of power brick; And an end that detects resistance is continuous, and the other end of said detection resistance links to each other with the earth with detection port through isolation capacitance successively.
2. battery of electric vehicle bag electric-leakage detection circuit according to claim 1 is characterized in that said power supply comprises low-tension supply and isolating transformer, and said low-tension supply links to each other with signal generating circuit through isolating transformer.
3. battery of electric vehicle bag electric-leakage detection circuit according to claim 1 is characterized in that said power supply comprises the step-down transformer that links to each other with power brick, and this step-down transformer links to each other with signal generating circuit.
4. battery of electric vehicle bag electric-leakage detection circuit according to claim 1 is characterized in that, said detection resistance is a resistance.
5. battery of electric vehicle bag electric-leakage detection circuit according to claim 1 is characterized in that, said detection resistance is connected by at least two resistance or composed in parallel.
6. according to each described battery of electric vehicle bag electric-leakage detection circuit of claim 1 to 5, it is characterized in that said low-tension supply is an accumulator.
7. battery of electric vehicle bag electric-leakage detection circuit according to claim 6 is characterized in that the voltage that said accumulator provides is 12V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201784516U CN202119840U (en) | 2011-05-31 | 2011-05-31 | Leakage detection circuit of electric vehicle battery packet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201784516U CN202119840U (en) | 2011-05-31 | 2011-05-31 | Leakage detection circuit of electric vehicle battery packet |
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| Publication Number | Publication Date |
|---|---|
| CN202119840U true CN202119840U (en) | 2012-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011201784516U Expired - Lifetime CN202119840U (en) | 2011-05-31 | 2011-05-31 | Leakage detection circuit of electric vehicle battery packet |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103674454A (en) * | 2012-09-24 | 2014-03-26 | 微宏动力系统（湖州）有限公司 | Battery-pack leakage-liquid detection system |
| CN106443291A (en) * | 2015-08-04 | 2017-02-22 | 浙江诺尔康神经电子科技股份有限公司 | Electric leakage detecting device and electric leakage detecting method for artificial cochlear implantation prosthesis |
-
2011
- 2011-05-31 CN CN2011201784516U patent/CN202119840U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103674454A (en) * | 2012-09-24 | 2014-03-26 | 微宏动力系统（湖州）有限公司 | Battery-pack leakage-liquid detection system |
| CN106443291A (en) * | 2015-08-04 | 2017-02-22 | 浙江诺尔康神经电子科技股份有限公司 | Electric leakage detecting device and electric leakage detecting method for artificial cochlear implantation prosthesis |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120118 |
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| CX01 | Expiry of patent term |