CN115508728A - Multi-channel internal resistance test automatic compensation method and system - Google Patents
Multi-channel internal resistance test automatic compensation method and system Download PDFInfo
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- CN115508728A CN115508728A CN202210941752.2A CN202210941752A CN115508728A CN 115508728 A CN115508728 A CN 115508728A CN 202210941752 A CN202210941752 A CN 202210941752A CN 115508728 A CN115508728 A CN 115508728A
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Abstract
The invention provides a multichannel internal resistance test automatic compensation method and a multichannel internal resistance test automatic compensation system in the technical field of battery tests, wherein the method comprises the following steps: step S1, pressing a probe of a test loop A of the internal resistance instrument on a channel A zero clearing module, and pressing a probe of a test loop B on a channel B zero clearing module; s2, conducting a relay of the test loop A after the internal resistance meter performs self-checking, and performing short circuit on the test loop A through the channel A reset module so as to reset the test loop A; s3, acquiring a measured value A of the test loop A, and checking a zero clearing result of the test loop A based on the measured value A; s4, the internal resistance meter conducts a relay of the test loop B to obtain an actual measurement value B of the test loop B; and S5, calculating a channel difference value based on the measured value A and the measured value B, and automatically compensating the internal resistance test based on the channel difference value. The invention has the advantages that: the internal resistance testing precision is greatly improved.
Description
Technical Field
The invention relates to the technical field of battery testing, in particular to an automatic compensation method and system for multi-channel internal resistance testing.
Background
After the production of the battery is completed, a series of tests are required, and the test contents comprise an internal resistance value, an OCV value, a shell voltage value and the like. The battery comprises a plurality of battery cores, when the internal resistance of the battery is tested, the internal resistance of each battery core is respectively tested through a multi-channel test loop of the internal resistance instrument, and then the internal resistance of each battery core is accumulated to obtain the internal resistance of the battery.
Due to the fact that the internal resistances of the testing loops of the internal resistance instrument are different, namely the consistency of the internal resistances is poor, and the internal resistance of the battery cell is small, the internal resistances obtained by the testing loops are large in deviation. Therefore, how to provide an automatic compensation method and system for multi-channel internal resistance test to improve the internal resistance test precision becomes a technical problem to be solved urgently.
Disclosure of Invention
The invention aims to provide a multi-channel internal resistance test automatic compensation method and system, and improve the internal resistance test precision.
In a first aspect, the invention provides an automatic compensation method for a multi-channel internal resistance test, which comprises the following steps:
s1, pressing a probe of a test loop A of the internal resistance instrument on a channel A clear module, and pressing a probe of a test loop B on a channel B clear module;
s2, conducting a relay of the test loop A after the internal resistance meter performs self-checking, and performing short circuit on the test loop A through the channel A reset module so as to reset the test loop A;
s3, acquiring a measured value A of the test loop A, and checking a zero clearing result of the test loop A based on the measured value A;
s4, the internal resistance meter conducts a relay of the test loop B to obtain an actual measurement value B of the test loop B;
and S5, calculating a channel difference value based on the measured value A and the measured value B, and automatically compensating the internal resistance test based on the channel difference value.
Further, in the step S1, the channel a clear module and the channel B clear module each include two clear copper bars and two wires, and both ends of each wire are connected to one clear copper bar, so as to form a four-wire system clear loop.
Further, the step S3 specifically includes:
the test loop A is connected with a standard resistor in series, a measured value A of the test loop A is obtained, whether the measured value A is consistent with the resistance value of the standard resistor or not is judged, if yes, zero clearing is successful, and the step S4 is entered; if not, resetting fails and alarming is carried out.
Further, the step S4 specifically includes:
the internal resistance instrument conducts a relay of the test loop B, short-circuits the test loop B through the channel B zero clearing module, continuously reads n measured values B 'of the test loop B, and calculates the mean value of the n measured values B' to obtain a measured value B; n is a positive integer.
Further, in step S5, the calculation formula of the channel difference value is:
channel difference value = abs (found a-found B).
In a second aspect, the invention provides an automatic compensation system for a multi-channel internal resistance test, which comprises the following modules:
the initialization module is used for pressing a probe of the test loop A of the internal resistance instrument on the channel A zero clearing module and pressing a probe of the test loop B on the channel B zero clearing module;
the A test loop zero clearing module is used for conducting a relay of the A test loop after the internal resistance meter performs self-checking, and conducting short circuit on the A test loop through the A channel zero clearing module so as to clear the A test loop;
the zero clearing result checking module is used for acquiring the measured value A of the test loop A and checking the zero clearing result of the test loop A based on the measured value A;
the B test loop conduction module is used for conducting a relay of the B test loop through the internal resistance instrument to obtain an actual measurement value B of the B test loop;
and the test compensation module is used for calculating a channel difference value based on the measured value A and the measured value B and automatically compensating the internal resistance test based on the channel difference value.
Further, in the initialization module, the channel a clear module and the channel B clear module each include two clear copper bars and two wires, and two ends of each wire are connected with one clear copper bar respectively to form a four-wire system clear loop.
Further, the zero clearing result checking module specifically includes:
the test loop A is connected with a standard resistor in series, a measured value A of the test loop A is obtained, whether the resistance value of the measured value A is consistent with that of the standard resistor or not is judged, if yes, zero clearing is successful, and the test loop B enters a test loop conduction module; if not, resetting fails and alarming is carried out.
Further, the B test loop conducting module specifically includes:
the internal resistance instrument conducts a relay of the test loop B, short-circuits the test loop B through the channel B zero clearing module, continuously reads n measured values B 'of the test loop B, and calculates the mean value of the n measured values B' to obtain a measured value B; n is a positive integer.
Further, in the test compensation module, a calculation formula of the channel difference value is as follows:
channel difference value = abs (found a-found B).
The invention has the advantages that:
the probe of the test loop A is pressed on the channel A zero clearing module, the probe of the test loop B is pressed on the channel B zero clearing module, after the relay of the test loop A is conducted to zero clearing, the measured value A of the test loop A is used as a standard value, then the relay of the test loop B is conducted to zero clearing, the measured value B of the test loop B is obtained, the absolute difference between the measured value A and the measured value B is calculated to obtain a channel difference value, when the test loop B is tested normally, the channel difference value is used for compensating the internal resistance of the test, the internal resistance consistency of the test loop A and the test loop B can be improved, and finally the internal resistance test precision is greatly improved.
Drawings
The invention will be further described with reference to the following examples and figures.
FIG. 1 is a flow chart of an automatic compensation method for multi-channel internal resistance test according to the present invention.
Fig. 2 is a schematic structural diagram of an automatic compensation system for multi-channel internal resistance test according to the present invention.
FIG. 3 is a schematic structural diagram of the clearing apparatus of the present invention.
Description of the labeling:
100-zero clearing device, 1-fixed base, 2-A channel zero clearing module, 3-B channel zero clearing module, 21-zero clearing copper bar and 22-lead.
Detailed Description
The technical scheme in the embodiment of the application has the following general idea: after the test loop A is cleared, the measured value A of the test loop A is used as a standard value, then the test loop B is cleared to obtain a measured value B of the test loop B, the absolute difference between the measured value A and the measured value B is calculated to obtain a channel difference value, and the internal resistance test is compensated based on the channel difference value to improve the internal resistance test precision.
The invention needs to use the following zero clearing device 100, which comprises a fixed base 1, an A channel zero clearing module 2 and a B channel zero clearing module 3, wherein the A channel zero clearing module 2 and the B channel zero clearing module 3 are both arranged on the fixed base 1;
the A channel zero clearing module 2 and the B channel zero clearing module 3 both comprise two zero clearing copper bars 21 and two leads 22, and two ends of each lead 22 are respectively connected with one zero clearing copper bar 21 to form a four-wire zero clearing loop; the specifications of the two clear copper bars 21 are consistent, and the specifications of the two conducting wires 22 are consistent.
Referring to fig. 1 to 3, a preferred embodiment of the multi-channel internal resistance test automatic compensation method of the present invention includes the following steps:
s1, pressing a probe of a test loop A of the internal resistance instrument on a channel A clear module, and pressing a probe of a test loop B on a channel B clear module;
s2, conducting self-checking by the internal resistance meter, conducting a relay of the test loop A, and performing short circuit on the test loop A through the channel A zero clearing module so as to clear the test loop A;
s3, acquiring a measured value A of the test loop A, and checking a zero clearing result of the test loop A based on the measured value A;
s4, the internal resistance meter conducts a relay of the test loop B to obtain an actual measurement value B of the test loop B;
and S5, calculating a channel difference value based on the measured value A and the measured value B, and automatically compensating the internal resistance test based on the channel difference value, namely, when the internal resistance test is actually carried out, the actual value of the internal resistance = the measured value of the internal resistance instrument-the channel difference value.
The invention compensates the internal resistance test by measuring the channel difference values of different test loops in advance and then utilizing the channel difference values to overcome the problem that the internal resistances of the test loops are different. The invention can test the multichannel internal resistance by only one internal resistance instrument without additionally increasing the internal resistance instrument, thereby reducing the internal resistance test cost.
In the step S1, the a-channel clear module and the B-channel clear module each include two clear copper bars and two wires, and both ends of each wire are connected to a clear copper bar, so as to form a four-wire system clear loop.
The step S3 specifically comprises the following steps:
the test loop A is connected with a standard resistor in series, a measured value A of the test loop A is obtained, whether the measured value A is consistent with the resistance value of the standard resistor or not is judged, if yes, zero clearing is successful, and the step S4 is entered; if not, resetting fails and alarming is carried out.
The step S4 specifically comprises the following steps:
the internal resistance meter conducts a relay of the B test loop, the B test loop is short-circuited through the B channel zero clearing module, n measured values B 'of the B test loop are continuously read, and the average value of the n measured values B' is calculated to obtain a measured value B; n is a positive integer, and the value is preferably 3. And n measured values B' are continuously read for averaging, so that the accuracy of the measured values B is greatly improved.
In step S5, the calculation formula of the channel difference value is:
channel difference value = abs (found a-found B).
The invention discloses a preferred embodiment of a multi-channel internal resistance test automatic compensation system, which comprises the following modules:
the initialization module is used for pressing a probe of the A test loop of the internal resistance instrument on the A channel zero clearing module and pressing a probe of the B test loop on the B channel zero clearing module;
the A test loop zero clearing module is used for conducting a relay of the A test loop after the internal resistance meter performs self-checking, and conducting short circuit on the A test loop through the A channel zero clearing module so as to clear the A test loop;
the zero clearing result checking module is used for acquiring the measured value A of the test loop A and checking the zero clearing result of the test loop A based on the measured value A;
the B test loop conduction module is used for conducting a relay of the B test loop through the internal resistance instrument to obtain a measured value B of the B test loop;
and the test compensation module is used for calculating a channel difference value based on the measured value A and the measured value B, and automatically compensating the internal resistance test based on the channel difference value, namely when the internal resistance test is actually carried out, the actual internal resistance value = the measured value of the internal resistance instrument-the channel difference value.
The invention compensates the internal resistance test by measuring the channel difference values of different test loops in advance and then utilizing the channel difference values to overcome the problem that the internal resistances of the test loops are different. The invention can test the multi-channel internal resistance by only using one internal resistance instrument without additionally adding the internal resistance instrument, thereby reducing the internal resistance test cost.
In the initialization module, the A channel zero clearing module and the B channel zero clearing module respectively comprise two zero clearing copper bars and two conducting wires, and two ends of each conducting wire are respectively connected with one zero clearing copper bar to form a four-wire zero clearing loop.
The zero clearing result checking module specifically comprises:
the test loop A is connected with a standard resistor in series, a measured value A of the test loop A is obtained, whether the resistance value of the measured value A is consistent with that of the standard resistor or not is judged, if yes, zero clearing is successful, and the test loop B is entered into a test loop conducting module; if not, resetting fails and alarming is carried out.
The B test loop conducting module specifically comprises:
the internal resistance meter conducts a relay of the B test loop, the B test loop is short-circuited through the B channel zero clearing module, n measured values B 'of the B test loop are continuously read, and the average value of the n measured values B' is calculated to obtain a measured value B; n is a positive integer, and the value is preferably 3. And n measured values B' are continuously read for averaging, so that the accuracy of the measured values B is greatly improved.
In the test compensation module, the calculation formula of the channel difference value is as follows:
channel difference value = abs (found a-found B).
In conclusion, the invention has the advantages that:
the probe of the A test loop is pressed on the A channel zero clearing module, the probe of the B test loop is pressed on the B channel zero clearing module, after the relay of the A test loop is conducted to zero clearing, the measured value A of the A test loop is used as a standard value, and then the relay of the B test loop is conducted to zero clearing, the measured value B of the B test loop is obtained, the absolute difference between the measured value A and the measured value B is calculated to obtain a channel difference value, when the subsequent B test loop is normally tested, the channel difference value is used for compensating the tested internal resistance, so that the internal resistance consistency of the A test loop and the B test loop can be improved, and the internal resistance test precision is finally and greatly improved.
Although specific embodiments of the invention have been described above, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the appended claims.
Claims (10)
1. A multi-channel internal resistance test automatic compensation method is characterized in that: the method comprises the following steps:
s1, pressing a probe of a test loop A of the internal resistance instrument on a channel A clear module, and pressing a probe of a test loop B on a channel B clear module;
s2, conducting a relay of the test loop A after the internal resistance meter performs self-checking, and performing short circuit on the test loop A through the channel A reset module so as to reset the test loop A;
s3, acquiring a measured value A of the test loop A, and checking a zero clearing result of the test loop A based on the measured value A;
s4, the internal resistance instrument conducts a relay of the test loop B to obtain a measured value B of the test loop B;
and S5, calculating a channel difference value based on the measured value A and the measured value B, and automatically compensating the internal resistance test based on the channel difference value.
2. The method for automatically compensating for the multi-channel internal resistance test as claimed in claim 1, wherein: in the step S1, the a-channel clear module and the B-channel clear module each include two clear copper bars and two wires, and both ends of each wire are connected to a clear copper bar, so as to form a four-wire system clear loop.
3. The multi-channel internal resistance test automatic compensation method of claim 1, characterized in that: the step S3 specifically comprises the following steps:
the test loop A is connected with a standard resistor in series, a measured value A of the test loop A is obtained, whether the measured value A is consistent with the resistance value of the standard resistor or not is judged, if yes, zero clearing is successful, and the step S4 is entered; if not, resetting fails and alarming is carried out.
4. The multi-channel internal resistance test automatic compensation method of claim 1, characterized in that: the step S4 specifically comprises the following steps:
the internal resistance meter conducts a relay of the B test loop, the B test loop is short-circuited through the B channel zero clearing module, n measured values B 'of the B test loop are continuously read, and the average value of the n measured values B' is calculated to obtain a measured value B; n is a positive integer.
5. The method for automatically compensating for the multi-channel internal resistance test as claimed in claim 1, wherein: in step S5, the calculation formula of the channel difference value is:
channel difference value = abs (found a-found B).
6. The utility model provides a multichannel internal resistance test automatic compensation system which characterized in that: the system comprises the following modules:
the initialization module is used for pressing a probe of the A test loop of the internal resistance instrument on the A channel zero clearing module and pressing a probe of the B test loop on the B channel zero clearing module;
the A test loop zero clearing module is used for conducting a relay of the A test loop after the self-checking of the internal resistance instrument is carried out, and carrying out short circuit on the A test loop through the A channel zero clearing module so as to clear the A test loop;
the zero clearing result checking module is used for acquiring the measured value A of the test loop A and checking the zero clearing result of the test loop A based on the measured value A;
the B test loop conduction module is used for conducting a relay of the B test loop through the internal resistance instrument to obtain a measured value B of the B test loop;
and the test compensation module is used for calculating a channel difference value based on the measured value A and the measured value B and automatically compensating the internal resistance test based on the channel difference value.
7. The multi-channel internal resistance test automatic compensation system of claim 6, characterized in that: in the initialization module, the A-channel zero clearing module and the B-channel zero clearing module respectively comprise two zero clearing copper bars and two conducting wires, and two ends of each conducting wire are respectively connected with one zero clearing copper bar to form a four-wire zero clearing loop.
8. The multi-channel internal resistance test automatic compensation system of claim 6, characterized in that: the zero clearing result checking module specifically comprises:
the test loop A is connected with a standard resistor in series, a measured value A of the test loop A is obtained, whether the resistance value of the measured value A is consistent with that of the standard resistor or not is judged, if yes, zero clearing is successful, and the test loop B is entered into a test loop conducting module; if not, resetting fails and alarming is carried out.
9. The multi-channel internal resistance test automatic compensation system of claim 6, characterized in that: the B test loop conducting module specifically comprises:
the internal resistance meter conducts a relay of the B test loop, the B test loop is short-circuited through the B channel zero clearing module, n measured values B 'of the B test loop are continuously read, and the average value of the n measured values B' is calculated to obtain a measured value B; n is a positive integer.
10. The multi-channel internal resistance test automatic compensation system of claim 6, characterized in that: in the test compensation module, a calculation formula of the channel difference value is as follows:
channel difference value = abs (found a-found B).
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| CN202210941752.2A CN115508728A (en) | 2022-08-08 | 2022-08-08 | Multi-channel internal resistance test automatic compensation method and system |
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| CN202210941752.2A CN115508728A (en) | 2022-08-08 | 2022-08-08 | Multi-channel internal resistance test automatic compensation method and system |
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