CN115856437B - Method for detecting insulation resistance of high-voltage energy storage battery - Google Patents
Method for detecting insulation resistance of high-voltage energy storage battery Download PDFInfo
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- CN115856437B CN115856437B CN202211718518.XA CN202211718518A CN115856437B CN 115856437 B CN115856437 B CN 115856437B CN 202211718518 A CN202211718518 A CN 202211718518A CN 115856437 B CN115856437 B CN 115856437B
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- Y02E60/10—Energy storage using batteries
Abstract
The application relates to a method for detecting insulation impedance of a high-voltage energy storage battery, which comprises the following steps of S1, constructing an error balance model of voltage dividing resistance of an electrode of the high-voltage energy storage battery; s2, counting voltage values measured by an analog-digital converter end of the voltage dividing resistor of the electrode of the high-voltage energy storage battery, calculating equivalent impedance of the electrode of the battery to the protection grounding wire according to the voltage values measured by the analog-digital converter end, and recalculating equivalent impedance of the electrode of the battery to the protection grounding wire according to the product of an error balance model and the equivalent impedance of the electrode of the battery to the protection grounding wire calculated originally; s3, training an error balance model in the S2 step; s4, modifying the actual calculation of the equivalent impedance of the battery electrode pair protection ground wire by using a trained and mature error balance model. The calculation result is more accurate than the equivalent impedance of the battery electrode to the protection ground wire in the prior art.
Description
Technical Field
The application relates to a method for detecting insulation resistance of a high-voltage energy storage battery.
Background
The insulation resistance detection can be completed through an ohmmeter, the insulation resistance detection technology of a special high-voltage energy storage battery is less, the prior art has few records, the related technology is a nondestructive detection circuit and method for insulation resistance of a high-voltage energy storage battery energy storage system, for example, patent document CN104569598A, and the circuit comprises a resistance network, a voltage test differential amplifying circuit, a high-frequency filter circuit, a signal isolation circuit, an AD conversion circuit and a data processing unit which are connected in sequence. The technical scheme is used for detecting the positive electrode ground fault and the negative electrode ground fault of the energy storage battery system, and the calculation principle is as follows: the battery high-voltage dividing resistor network consists of resistors R1 and R2 and high-voltage switches Kp and Kn, the resistance values of the resistors R1 and R2 of the battery high-voltage dividing resistor network are calculated through the resistors in the voltage test differential amplifying circuit, specifically, the resistance values of the resistors R1 and R2 are calculated together according to the gain relation between the signal processing circuit and the isolating circuit and the voltage values measured by the end of the analog-digital converter at the rearmost end of the battery electrode voltage dividing resistor, and the equivalent impedance of the battery electrode to the protection grounding wire can be calculated on the basis, but in the calculation, the gain standard values of the signal processing circuit and the isolating circuit have errors, and the end measurement of the analog-digital converter at the rearmost end of the battery electrode voltage dividing resistor has errors, especially if the error is larger in the condition of a multistage amplifier circuit between the battery electrode voltage dividing resistor and the analog-digital converter at the rearmost end, the equivalent impedance of the battery electrode to the protection grounding wire is calculated in fact inaccurate.
Disclosure of Invention
In order to overcome the defects in the prior art, the application provides a method for detecting the insulation resistance of a high-voltage energy storage battery.
The application solves the technical problems by adopting the technical scheme that:
the method for detecting the insulation resistance of the high-voltage energy storage battery comprises the following steps of S1, constructing an error balance model of the voltage dividing resistance of the electrode of the high-voltage energy storage battery; s2, counting voltage values measured by an analog-digital converter end of the voltage dividing resistor of the electrode of the high-voltage energy storage battery, calculating equivalent impedance of the electrode of the battery to the protection grounding wire according to the voltage values measured by the analog-digital converter end, and recalculating equivalent impedance of the electrode of the battery to the protection grounding wire according to the product of an error balance model and the equivalent impedance of the electrode of the battery to the protection grounding wire calculated originally; s3, training an error balance model in the S2 step; s4, modifying the actual calculation of the equivalent impedance of the battery electrode pair protection ground wire by using a trained and mature error balance model.
Further, the error balance model is specifically TR1 (xAD)/TR 2 (xAD) ((TC (xAD)) -1 )*（TZ（xAD）） -1 Wherein xAD is specifically voltage value measured by analog-digital converter terminal, TR1 (xAD) and TR2 (xAD) are specifically resistance standard value error regression function, TC (xAD) is specifically measured error regression function, TZ (xA)D) Specifically, the gain scale error regression function.
Further, the TR1 (xAD) =e (-a1*xAD) *sin(w1*b1*xAD)/(w1*xAD-n) 2 The method comprises the steps of carrying out a first treatment on the surface of the Said TR2 (xAD) =e (-a2*xAD) *sin(w2*b2*xAD)/(w2*xAD-n) 2 The method comprises the steps of carrying out a first treatment on the surface of the The xAD is specifically a voltage value measured by an analog-to-digital converter end, a1, a2, b1, b2 and n are constants, and w1 and w2 are time parameters.
Further, the TC (xAD) = - (a1+a2)/(n× xAD ((1-lnxAD 2)) 2 ) 1/2 ) The method comprises the steps of carrying out a first treatment on the surface of the The xAD is specifically a voltage value measured by an analog-digital converter end, and a1, a2 and n are constants.
Further, the TZ (xAD) = ((a 1-a 2) 2 ) 1/2 /(-(a1+a2)*n*xAD*((1-ln(xAD) 2 ) 2 ) 1/2 ) The method comprises the steps of carrying out a first treatment on the surface of the The xAD is specifically a voltage value measured by an analog-digital converter end, and a1, a2 and n are constants.
Further, the actual calculation modification of the equivalent impedance of the battery electrode to the protection ground wire by using the trained and mature error balance model is specifically that when the voltage value measured by the analog-to-digital converter end of the voltage dividing resistor of the high-voltage energy storage battery electrode is xAD and the equivalent impedance of the battery electrode to the protection ground wire is R (xAD 1) by using the voltage value measured by the analog-to-digital converter end, the actual calculation modification of the equivalent impedance of the battery electrode to the protection ground wire by using the trained and mature error balance model is specifically that R (xAD 1) is calculated as follows: r (xAD) =r (xAD 1) TR1 (xAD 1)/TR 2 (xAD 1) ((TC (xAD 1)) -1 )*（TZ（xAD1）） -1 R (xAD 2) is the actual calculation of the equivalent impedance of the modified battery electrode to the protective ground line.
Advantageous effects
According to the application, the product of the error balance model and the equivalent impedance of the battery electrode pair protection ground wire calculated in the prior art is used for calculating the equivalent impedance of the battery electrode pair protection ground wire again, and the actual calculation of the equivalent impedance of the battery electrode pair protection ground wire is modified by using the trained error balance model, so that the calculation result after modification is more accurate than the equivalent impedance of the battery electrode pair protection ground wire calculated in the prior art.
Drawings
Fig. 1 is a flow chart of a method of detecting insulation resistance of a high voltage energy storage battery according to the present application.
Detailed Description
In practice, as shown in fig. 1, the method for detecting insulation resistance of a high-voltage energy storage battery of the present application comprises the steps of: s1, constructing an error balance model of the voltage dividing resistance of the electrode of the high-voltage energy storage battery; s2, counting voltage values measured by an analog-digital converter end of the voltage dividing resistor of the electrode of the high-voltage energy storage battery, calculating equivalent impedance of the electrode of the battery to the protection grounding wire according to the voltage values measured by the analog-digital converter end, and recalculating equivalent impedance of the electrode of the battery to the protection grounding wire according to the product of an error balance model and the equivalent impedance of the electrode of the battery to the protection grounding wire calculated originally; s3, training an error balance model in the S2 step; s4, modifying the actual calculation of the equivalent impedance of the battery electrode pair protection ground wire by using a trained and mature error balance model.
Preferably, the error balance model is specifically TR1 (xAD)/TR 2 (xAD) ((TC (xAD)) -1 )*（TZ（xAD）） -1 The xAD is specifically a voltage value measured by an analog-digital converter end, the TR1 (xAD) and the TR2 (xAD) are specifically resistance scale error regression functions, the TC (xAD) is specifically a measured error regression function, and the TZ (xAD) is specifically a gain scale error regression function.
Preferably, the TR1 (xAD) =e (-a1*xAD) *sin(w1*b1*xAD)/(w1*xAD-n) 2 The method comprises the steps of carrying out a first treatment on the surface of the Said TR2 (xAD) =e (-a2*xAD) *sin(w2*b2*xAD)/(w2*xAD-n) 2 The method comprises the steps of carrying out a first treatment on the surface of the The xAD is specifically voltage values measured by an analog-to-digital converter end, and the voltage values are constants, and w1 and w2 are time parameters.
Preferably, said TC (xAD) = - (a1+a2)/(n xAD ((1-lnxAD 2)) 2 ) 1/2 ) The method comprises the steps of carrying out a first treatment on the surface of the The xAD is specifically a voltage value measured by an analog-digital converter end, and a1, a2 and n are constants.
Preferably, said TZ (xAD) = ((a 1-a 2) 2 ) 1/2 /(-(a1+a2)*n*xAD*((1-ln(xAD) 2 ) 2 ) 1/2 ) The method comprises the steps of carrying out a first treatment on the surface of the Wherein xAD is specifically an analog-to-digital converter end testThe voltage values of the quantities, a1, a2, n are all constant.
Preferably, the actual calculation modification of the equivalent impedance of the battery electrode to the protection ground wire by using the trained error balance model is specifically that when the voltage value measured by the analog-digital converter end of the voltage dividing resistance of the high-voltage energy storage battery electrode is xAD1 and the equivalent impedance of the battery electrode to the protection ground wire is R (xAD 1) by using the voltage value measured by the analog-digital converter end, the actual calculation modification of the equivalent impedance of the battery electrode to the protection ground wire by using the trained error balance model is specifically that R (xAD 1) is calculated as follows:
R（xAD2）=R（xAD1）*TR1（xAD1）/TR2（xAD1）*(（TC（xAD1）） -1 )*（TZ（xAD1）） -1 r (xAD 2) is the actual calculation of the equivalent impedance of the modified battery electrode to the protective ground line.
In one specific implementation, the method for detecting the insulation resistance of the high-voltage energy storage battery comprises the following steps: s1, constructing an error balance model of the voltage dividing resistance of the electrode of the high-voltage energy storage battery; the error balance model is specifically described as,
TR1（xAD）/TR2（xAD）*(（TC（xAD）） -1 )*（TZ（xAD）） -1 ；
TR1（xAD）=e (-a1*xAD) *sin(w1*b1*xAD)/(w1*xAD-n) 2 ；
said TR2 (xAD) =e (-a2*xAD) *sin(w2*b2*xAD)/(w2*xAD-n) 2 ；
Said TC (xAD) = - (a1+a2)/(n x xAD x ((1-lnxAD 2)) 2 ) 1/2 )；
The TZ (xAD) = ((a 1-a 2) 2 ) 1/2 /(-(a1+a2)*n*xAD*((1-ln(xAD) 2 ) 2 ) 1/2 )；
The xAD is specifically a voltage value measured by an analog-digital converter end, the TR1 (xAD) and the TR2 (xAD) are specifically resistance scale value error regression functions, the TC (xAD) is specifically a measured error regression function, and the TZ (xAD) is specifically a gain scale value error regression function;
s2, counting voltage values measured by an analog-digital converter end of the voltage dividing resistor of the electrode of the high-voltage energy storage battery, calculating equivalent impedance of the electrode of the battery to the protection grounding wire according to the voltage values measured by the analog-digital converter end, and recalculating equivalent impedance of the electrode of the battery to the protection grounding wire according to the product of an error balance model and the equivalent impedance of the electrode of the battery to the protection grounding wire calculated originally;
s3, training an error balance model in a circulating S2 step, wherein the product of the calculated error balance model and the equivalent impedance of the battery electrode pair protection grounding wire calculated in the prior art is made to be as close to the real value of the equivalent impedance of the battery electrode pair protection grounding wire as possible; the numerical values of a1, a2, b1, b2 and n can be specifically modified in training;
s4, modifying the actual calculation of the equivalent impedance of the battery electrode to the protection ground wire by using a training mature error balance model, when the voltage value measured by the analog-digital converter end of the voltage dividing resistor of the high-voltage energy storage battery electrode is xAD1, and the equivalent impedance of the battery electrode to the protection ground wire is calculated by using the voltage value measured by the analog-digital converter end to be R (xAD 1), the actual calculation of the equivalent impedance of the battery electrode to the protection ground wire by using the training mature error balance model is specifically calculated by using R (xAD 1) as follows:
R（xAD2）=R（xAD1）*TR1（xAD1）/TR2（xAD1）*(（TC（xAD1）） -1 )*（TZ（xAD1）） -1 r (xAD 2) is the actual calculation of the equivalent impedance of the modified battery electrode to the protective ground line.
In the implementation of the application, the equivalent impedance of the battery electrode to the protection ground wire is recalculated by the product of the error balance model and the equivalent impedance of the battery electrode to the protection ground wire calculated in the prior art, and the actual calculation of the equivalent impedance of the battery electrode to the protection ground wire is modified by the training mature error balance model, so that the calculation result after modification is more accurate than the equivalent impedance of the battery electrode to the protection ground wire calculated in the prior art.
Claims (5)
1. The method for detecting the insulation resistance of the high-voltage energy storage battery is characterized by comprising the following steps of S1, constructing an error balance model of the voltage dividing resistance of the electrode of the high-voltage energy storage batteryThe method comprises the steps of carrying out a first treatment on the surface of the S2, counting voltage values measured by an analog-digital converter end of the voltage dividing resistor of the electrode of the high-voltage energy storage battery, calculating equivalent impedance of the electrode of the battery to the protection grounding wire according to the voltage values measured by the analog-digital converter end, and recalculating equivalent impedance of the electrode of the battery to the protection grounding wire according to the product of an error balance model and the equivalent impedance of the electrode of the battery to the protection grounding wire calculated originally; s3, training an error balance model in the S2 step; s4, modifying the actual calculation of the equivalent impedance of the battery electrode pair protection ground wire by using a training mature error balance model; the error balance model is specifically TR1 (xAD)/TR 2 (xAD) ((TC (xAD)) -1 )*（TZ（xAD）） -1 The xAD is specifically a voltage value measured by an analog-digital converter end, the TR1 (xAD) and the TR2 (xAD) are specifically resistance scale error regression functions, the TC (xAD) is specifically a measured error regression function, and the TZ (xAD) is specifically a gain scale error regression function.
2. The method for detecting insulation resistance of high-voltage energy storage battery according to claim 1, wherein TR1 (xAD) =e (-a1*xAD) *sin(w1*b1*xAD)/(w1*xAD-n) 2 The method comprises the steps of carrying out a first treatment on the surface of the Said TR2 (xAD) =e (-a2*xAD) *sin(w2*b2*xAD)/(w2*xAD-n) 2 The method comprises the steps of carrying out a first treatment on the surface of the The xAD is specifically a voltage value measured by an analog-to-digital converter end, a1, a2, b1, b2 and n are constants, and w1 and w2 are time parameters.
3. The method of claim 1, wherein TC (xAD) = - (a1+a2)/(n× xAD ((1-lnxAD 2)) 2 ) 1/2 ) The method comprises the steps of carrying out a first treatment on the surface of the The xAD is specifically a voltage value measured by an analog-digital converter end, and a1, a2 and n are constants.
4. The method of high voltage storage battery insulation resistance detection according to claim 1, wherein the TZ (xAD) = ((a 1-a 2) 2 ) 1/2 /(-(a1+a2)*n*xAD*((1-ln(xAD) 2 ) 2 ) 1/2 ) The method comprises the steps of carrying out a first treatment on the surface of the The xAD is specifically a voltage value measured by an analog-digital converter end, and a1, a2 and n are constants.
5. The method for detecting the insulation impedance of the high-voltage energy storage battery according to claim 1, wherein the actual calculation modification of the equivalent impedance of the battery electrode to the protection ground wire by using a trained and mature error balance model is as follows: when the voltage value measured by the analog-digital converter end of the voltage dividing resistor of the high-voltage energy storage battery electrode is xAD1, and the equivalent impedance of the battery electrode to the protection ground wire is calculated by using the voltage value measured by the analog-digital converter end as R (xAD 1), the actual calculation and modification of the equivalent impedance of the battery electrode to the protection ground wire by using the well-trained error balance model is specifically calculated by using R (xAD 1) as follows:
R（xAD2）=R（xAD1）*TR1（xAD1）/TR2（xAD1）*(（TC（xAD1）） -1 )*（TZ（xAD1）） -1 r (xAD 2) is the actual calculation of the equivalent impedance of the modified battery electrode to the protective ground line.
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