CN117907913A

CN117907913A - Current-voltage calibration method, apparatus, and computer-readable storage medium

Info

Publication number: CN117907913A
Application number: CN202311684634.9A
Authority: CN
Inventors: 苏景山; 刘涛; 赵小品; 黄凯
Original assignee: Shenzhen Xianyang New Energy Technology Co ltd
Current assignee: Shenzhen Xianyang New Energy Technology Co ltd
Priority date: 2023-12-07
Filing date: 2023-12-07
Publication date: 2024-04-19

Abstract

The embodiment of the application discloses a current and voltage sampling calibration method, a device and a computer readable storage medium; the current and voltage of the battery channel within a preset time period can be measured to obtain an actual measured value; based on a preset sampling method, sampling the current and the voltage of the battery channel in the preset time length to obtain a sampling value to be calibrated; constructing a sampling curve to be calibrated based on the sampling value to be calibrated; determining the number of segments to be calibrated required for calibrating the sampling value to be calibrated, and dividing the sampling curve to be calibrated into a plurality of segments to be calibrated based on the number of segments to be calibrated; determining a calibration parameter corresponding to each section to be calibrated based on the actual measurement value corresponding to the two end points of each section to be calibrated and the sampling value to be calibrated; and calibrating the sampling value to be calibrated based on the calibration parameter to obtain a calibrated sampling value. The application can dynamically adjust the number of current and voltage calibration segments according to actual demands, and improves the current and voltage sampling precision.

Description

Current-voltage calibration method, apparatus, and computer-readable storage medium

Technical Field

The present invention relates to the field of battery manufacturing, and in particular, to a current-voltage calibration method, apparatus, and computer-readable storage medium.

Background

With the development of the age, lithium batteries are increasingly widely used. The chemical composition is used as an important link in the manufacture of lithium batteries, and has high requirements on the measurement accuracy of the current and the voltage of power supply equipment. Besides the adoption of a high-precision AD sampling chip, high-precision calibration is often required to be carried out on current and voltage sampling of power equipment in the production process. The traditional single-section calibration gradually evolves into multi-section calibration because the precision is not high enough, but the calibration section number and the calibration point of the traditional multi-section calibration are fixed, can not select according to the different flexibility of technology, and the requirement of higher and higher sampling precision is difficult to satisfy.

Disclosure of Invention

The invention provides a method and a device for calibrating current and voltage of formation equipment and a computer readable storage medium, which can dynamically adjust the number of current and voltage calibration segments according to actual requirements and improve the sampling precision of the current and the voltage.

The embodiment of the application provides a method for calibrating current and voltage of formation equipment, which comprises the following steps:

Measuring the current and voltage of the battery channel within a preset time length to obtain an actual measured value;

based on a preset sampling method, sampling the current and the voltage of the battery channel in the preset time length to obtain a sampling value to be calibrated;

constructing a sampling curve to be calibrated based on the sampling value to be calibrated;

Determining the number of segments to be calibrated required for calibrating the sampling value to be calibrated, and dividing the sampling curve to be calibrated into a plurality of segments to be calibrated based on the number of segments to be calibrated;

Determining a calibration parameter corresponding to each section to be calibrated based on the actual measurement value corresponding to the two end points of each section to be calibrated and the sampling value to be calibrated;

and calibrating the sampling value to be calibrated based on the calibration parameter to obtain a calibrated sampling value.

Correspondingly, the embodiment of the invention provides a calibration device for the current and the voltage of the formation equipment, which comprises the following components:

The measuring unit is used for measuring the current and the voltage of the battery channel within a preset time length to obtain an actual measured value;

the sampling unit is used for sampling the current and the voltage of the battery channel in the preset duration based on a preset sampling method to obtain a sampling value to be calibrated;

the construction unit is used for constructing a sampling curve to be calibrated based on the sampling value to be calibrated;

The setting unit is used for determining the number of segments to be calibrated required for calibrating the sampling value to be calibrated and dividing the sampling curve to be calibrated into a plurality of segments to be calibrated based on the number of segments to be calibrated;

The determining unit is used for determining the calibration parameters corresponding to each section to be calibrated based on the actual measurement values corresponding to the two end points of each section to be calibrated and the sampling values to be calibrated;

The calibration unit is used for sequentially calculating and calibrating the sampling value to be calibrated based on the calibration parameters of the calibration segments;

Alternatively, in some embodiments of the present application, the sampling unit may include a sampling subunit and a conversion subunit, as follows:

The sampling subunit is used for sampling the current and the voltage of the battery channel within the preset duration based on a preset sampling method to obtain an initial sampling value.

And the conversion subunit is used for carrying out linear conversion on the initial sampling value to obtain a sampling value to be calibrated.

Optionally, in some embodiments of the present application, the sampling subunit may be specifically configured to determine a linear conversion parameter corresponding to the preset sampling method; and carrying out linear conversion on the initial sampling value based on the linear conversion parameter to obtain a sampling value to be calibrated.

Alternatively, in some embodiments of the present application, the setting unit may include a first setting subunit and a second setting subunit, as follows:

the first setting subunit is used for determining the number of segments to be calibrated required for calibrating the sampling value to be calibrated;

And the second setting subunit is used for setting a calibration point based on the number of segments to be calibrated and dividing the sampling curve to be calibrated into a plurality of segments to be calibrated based on the calibration point.

Optionally, in some embodiments of the present application, the second setting subunit may specifically be configured to determine, based on a battery production process, a calibration point number based on the number of segments to be calibrated; determining a current voltage value corresponding to each calibration point based on a battery production process; and dividing the sampling curve to be calibrated into a plurality of segments to be calibrated based on the calibration points and the current voltage values corresponding to each calibration point.

Alternatively, in some embodiments of the present application, the determining unit may include a determining subunit, an acquiring subunit, and a second determining subunit, as follows:

the determining subunit is configured to determine the sampling values to be calibrated corresponding to two end points of each segment to be calibrated;

The acquisition subunit is used for acquiring the actual measured values corresponding to the two ends of each section to be calibrated based on the endpoints;

And the second determination subunit is used for determining the calibration parameters corresponding to each section to be calibrated based on the actual measurement values corresponding to the two ends of each section to be calibrated and the sampling values to be calibrated.

Optionally, in some embodiments of the present application, the apparatus may further include a determining subunit and a determining subunit as follows:

the judging subunit is used for judging the difference information between the calibrated sampling value and the actual measurement value through the power supply calibration module;

And the judging subunit is used for judging the calibration qualification based on the difference information.

The electronic device provided by the embodiment of the application comprises a processor and a memory, wherein the memory stores a plurality of instructions, and the processor loads the instructions to execute part of the steps in the current-voltage calibration method provided by the embodiment of the application.

The embodiment of the application also provides a computer readable storage medium, on which a computer program is stored, wherein the computer program, when being executed by a processor, realizes part of the steps in the current-voltage calibration method provided by the embodiment of the application.

In addition, the embodiment of the application also provides a computer program product, which comprises a computer program or instructions, and the computer program or instructions realize part of the steps in the current voltage calibration method provided by the embodiment of the application when being executed by a processor.

The embodiment of the application provides a current and voltage calibration method and related equipment, which can measure the current and voltage of a battery channel within a preset time length to obtain an actual measured value; based on a preset sampling method, sampling the current and the voltage of the battery channel in the preset time length to obtain a sampling value to be calibrated; constructing a sampling curve to be calibrated based on the sampling value to be calibrated; determining the number of segments to be calibrated required for calibrating the sampling value to be calibrated, and dividing the sampling curve to be calibrated into a plurality of segments to be calibrated based on the number of segments to be calibrated; determining a calibration parameter corresponding to each section to be calibrated based on the actual measurement value corresponding to the two end points of each section to be calibrated and the sampling value to be calibrated; and calibrating the sampling value to be calibrated based on the calibration parameter to obtain a calibrated sampling value. The application can dynamically adjust the current and voltage calibration segment number according to actual demands, and flexibly set the value of the calibration point through the upper computer to issue, so that power software does not need to contract the calibration segment number and the calibration point during encoding, thereby improving the current and voltage sampling precision.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a block diagram of a system related to calibration of a current and voltage of a formation device according to an embodiment of the present application;

FIG. 2 is a flow chart of a calibration of the current and voltage of a formation device according to an embodiment of the present application;

FIG. 3 is a graph of current measured by a high precision multimeter provided by an embodiment of the present application;

FIG. 4 is a graph of current samples to be calibrated provided by an embodiment of the present application;

FIG. 5 is a graph showing the relationship between the current meter measurement and the current sample value according to an embodiment of the present application;

FIG. 6 is an operator interface for setting the number of calibration segments and the value of the calibration points provided by an embodiment of the present application;

FIG. 7 is a graph of current samples to be calibrated after calibration segments and calibration points have been determined, provided by an embodiment of the present application;

FIG. 8 is another flow chart of a calibration of the current and voltage of a chemical conversion equipment according to an embodiment of the present application;

FIG. 9 is a schematic diagram of a calibration structure for current and voltage of a formation device according to an embodiment of the present application;

Fig. 10 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The embodiment of the invention provides a current and voltage sampling calibration method of formation equipment, which is used for correcting deviation of a hardware sampling circuit, so that a sampled current and voltage sampling signal is more accurate after calibration, the sampling signal is a digital signal, and the digital signal is used as a control signal for controlling equipment by a lower computer. Thus, high accuracy calibration of the sampled signal may allow the lower computer to more accurately control the device.

In order to better understand the calibration method for sampling the current and the voltage of the formation equipment provided by the embodiment, a battery test system needs to be described first.

As shown in FIG. 1, the battery test system mainly comprises a numerical control power supply, an upper computer, a middle computer, a lower computer, a current and voltage sampling circuit, a high-precision universal meter, a needle bed, equipment to be calibrated and the like.

The numerical control power supply is a power supply for providing electric energy for the whole system.

The upper computer is used for editing the running process of the battery channel, displaying the running state of the battery channel in real time, and storing and statistically analyzing the data obtained by the test.

The middle position machine is mainly used for connecting the upper position machine and the lower position machine, transmitting data and commands between the upper position machine and the lower position machine, and realizing the management of the operation of the battery channel.

The lower computer is used as an execution part of the test system and is mainly used for executing the flow of the whole test task, and collecting and uploading the data obtained by the test.

The current and voltage sampling circuit is a circuit for acquiring sampling current and sampling voltage in the battery channel.

The needle bed is a non-standard auxiliary testing fixture for testing on-line components by utilizing electric performance to check production and manufacturing defects and poor components.

The following will describe the embodiments of the present invention in detail in terms of steps. As shown in fig. 2, the specific flow of the calibration method of the current and voltage of the formation device may be as follows:

201. and measuring the current and voltage of the battery channel within a preset time period to obtain an actual measured value.

The practical measurement value is that the upper computer sets an operation process for the calibration flow, when the battery channel is charged and discharged based on the set operation process, the current and the voltage are monitored in real time by adopting a high-precision universal meter in the process, the practical current and the voltage value of the battery channel are measured, and the measured value is the practical measurement value, and the measurement and the recording are carried out.

For example, as shown in FIG. 3, a graph of current versus time measured with a high precision multimeter over a predetermined period of time is shown. Wherein the abscissa represents time and the ordinate represents the actual measured current. In one embodiment, for example, the current values measured using a high precision multimeter are-215805.9 mA, -130470.5mA, -45890.5mA, 41573.4mA, 127975.3mA, 217408.7mA.

202. Based on a preset sampling method, sampling the current and the voltage of the battery channel within a preset time length to obtain a sampling value to be calibrated.

And presetting a sampling method, determining a sampling time interval based on the preset sampling method, and sampling current and voltage to obtain a sampling value to be calibrated.

In one embodiment, for example, the sampled values to be calibrated are-215310.5 mA, -130189.2mA, -45570.9mA, 41237.7mA, 127613.4mA, 217112.6mA.

Optionally, in this embodiment, the step of "sampling the current and the voltage of the battery channel within a preset duration to obtain a sample value to be calibrated based on a preset sampling method" may include:

Based on a preset sampling method, sampling the current and the voltage of the battery channel within a preset time length to obtain an initial sampling value;

and linearly converting the initial sampling value to obtain a sampling value to be calibrated.

The initial sampling value is a value obtained directly by sampling with an ADC sampling chip. However, due to the differences between different chips and the design of different hardware circuits, the direct value obtained by ADC sampling is not the sampling value to be calibrated, but the initial sampling value.

Based on a preset sampling method, after sampling the current and voltage of the battery channel within a preset time length to obtain an initial sampling value, the conversion proportion and bias corresponding to the rated value need to be calculated according to the measuring range of the ADC chip and the design of a hardware circuit, and the initial sampling value is subjected to linear conversion to obtain a sampling value to be calibrated.

Optionally, in this embodiment, the step of performing linear conversion on the initial sampling value to obtain a sampling value to be calibrated may include:

Determining a linear conversion parameter corresponding to a preset sampling method;

and carrying out linear conversion on the initial sampling value based on the linear conversion parameter to obtain a sampling value to be calibrated.

The linear conversion parameter is a parameter for converting the value of the ADC sampling chip into a sampling value to be calibrated. Because the ADC samples only can sample voltage and limits the range, which is 0-3.3V, it is necessary to design corresponding hardware circuits to sample and then convert the sampled value into ADC register value, and finally convert the register value into a scalar value. The conversion is a linear conversion, so the conversion parameter is divided into two parts: the gain corresponding to the sampling circuit and the ADC input bias voltage.

In an embodiment, for example, according to the measuring range of the ADC chip and the design of the hardware circuit, the calculated rated value corresponds to the gain 0.0039827806, the offset corresponding to the rated value is 1.5v, the ADC samples only the voltage, and the current conversion is obtained according to the designed hardware circuit. The obtained direct current value is 300A, and then the value of the sampling point to be calibrated corresponding to the sampling point is 300 x 0.0039827806+1.5v, which is equal to 2.6948341837V. Conversion to a register value requires removal of the bias voltage to enable ADC sampling, in one embodiment, the ADC chip has a digital scale of 4096 and an ADC input range of 0-3V, so the register value in the example is calculated as 4096+.3x0.0039827806=1631. The register value is converted into a scalar value 25000 of lower computer software, when the register value is calculated to 25000=k ₀*1631+B₀,B₀ default value is 0, K ₀ is calculated to 25000≡1631= 15.32801962. The scalar values may correspond to corresponding voltage current values in the software, for example, 300000mA for the current rating in the example, and 300000 +.25000=12 for the corresponding ratio.

Taking 250A sampling as an example, the conversion process is that the register value is

4096/3×250×0.0039827806=1359. Converting to a software display sample value as

1359 X 15.3280962 x 12= 249969.3mA. We can therefore switch from 250 x 0.0039827806+1.5= 2.4956951531V for the ADC samples to 249969.3mA for the sample to be calibrated.

As shown in fig. 5, the relationship between the ammeter measured value and the current sampling value is that the ammeter measured value and the current sampling value are not identical, and are approximately in a proportional relationship, and the difference between the ammeter measured value and the current sampling value is not very large.

203. And constructing a sampling curve to be calibrated based on the sampling value to be calibrated.

The sampling values to be calibrated are a series of current-voltage sampling values to be calibrated, and the discrete values are connected in a coordinate system to form a sampling curve to be calibrated, wherein the sampling current values to be calibrated form a current sampling curve, and the sampling voltage values to be calibrated form a voltage sampling curve.

For example, using current as an example, the following sample values to be calibrated have been obtained: -215310.5mA, -130189.2mA, -45570.9mA, 41237.7mA, 127613.4mA, 217112.6mA. The time is taken as an abscissa, the magnitude of the sampling current value is taken as an ordinate, and the sampling curve to be calibrated as shown in fig. 4 is drawn in a coordinate system.

204. And determining the number of segments to be calibrated required for calibrating the sampling value to be calibrated, and dividing the sampling curve to be calibrated into a plurality of segments to be calibrated based on the number of segments to be calibrated.

When the number of segments to be calibrated is the voltage and the current sampled by calibration, the current-voltage curve is divided into a plurality of segments. Each segment will be calibrated separately. When the number of calibration segments is determined, the sample points to be calibrated all belong to a certain segment of the calibration segments. Determining which section the sampling point to be calibrated is located, and comparing the sampling point to be calibrated with the right end point of each section successively from the first section, if the sampling point to be calibrated is smaller than the right end calibration point, taking the section, and if the sampling point to be calibrated is not smaller than the right end calibration point, comparing the sampling point to be calibrated with the next section. Each segment corresponds to a calibration parameter.

The calibration parameters are parameters used for calibrating sampling values to be calibrated, and consist of a gain k, a bias b and a calibration point p. For example, if the current value to be calibrated is y, the calibrated current value is equal to y×k+b.

After the number of segments to be calibrated is determined, the sampling curve to be calibrated can be divided into a plurality of segments to be calibrated.

Optionally, in this embodiment, the step of determining the number of segments to be calibrated required for calibrating the sampling value to be calibrated and dividing the sampling curve to be calibrated into a plurality of segments to be calibrated based on the number of segments to be calibrated may include:

determining the number of segments to be calibrated required for calibrating the sampling value to be calibrated;

And setting a calibration point based on the number of segments to be calibrated, and dividing the sampling curve to be calibrated into a plurality of segments to be calibrated based on the calibration point.

The segments to be calibrated are determined by a selection process, and specific implementation work for dividing the segments to be calibrated is started after the segments to be calibrated are determined based on the selection process.

For example, using current calibration as an example, the "sequence number" column is a point for dividing calibration segments, where each "sequence number" is added, the calibration segments are increased by one, and the number of calibration segments is equal to the number of sequence numbers minus one. As shown in fig. 6, there are six "sequence numbers" in total, so the number of calibration segments is five.

Optionally, in this embodiment, the step of "setting the calibration point based on the number of segments to be calibrated and dividing the sampling curve to be calibrated into a plurality of segments to be calibrated based on the calibration point" may include:

Based on the battery production process, determining calibration points based on the number of segments to be calibrated;

determining a current voltage value corresponding to each calibration point based on a battery production process;

And dividing the sampling curve to be calibrated into a plurality of segments to be calibrated based on the calibration points and the current voltage value corresponding to each calibration point.

Wherein the calibration points are points for determining calibration parameters of the calibration segments, at both end points of each calibration segment. The calibration parameters of the segment can be calculated according to the corresponding table measured values and sampling values of the calibration points of the two endpoints of the calibration segment.

After the calibration segment is determined according to the selection process, the number of calibration points is determined. For example, the number of calibration segments is five, and the number of calibration points is six. Each calibration point corresponds to a current value or a voltage value, if the sampling point to be calibrated is a current value, the calibration point corresponds to a current value, and if the sampling point to be calibrated is a voltage value, the calibration point corresponds to a voltage value.

For example, as shown in the operation interface of fig. 6, when the number of calibration segments is determined, and the number of calibration points is also determined according to the number of calibration segments, the specific values of the calibration points can be set according to the process requirements. The calibration points may be equally dividing the current range of the power supply or unevenly, as will be required for a particular process. For example, if the power supply module of 5V300A is divided into five calibration segments, there are six calibration points, and taking current as an example, if the current range of the power supply is equally divided, the current range of each calibration segment is 120A, that is, the current values of the six calibration points are respectively: -300A, -180A, -60A, 180A, 300A. The current range of the power supply can be divided unevenly as required, and the current range of each calibration segment can be flexibly controlled, for example, the values of six calibration points can be set as follows: -300A, -100A, -50A, 70A, 200A, 300A.

After the number of calibration segments and the values of the calibration points are determined, each of the to-be-calibrated sampling points belongs to one of the calibration segments, and the calibration points divide the to-be-calibrated sampling current or voltage sampling curve into a plurality of to-be-calibrated segments.

205. And determining the calibration parameters corresponding to each section to be calibrated based on the actual measurement values corresponding to the two end points of each section to be calibrated and the sampling values to be calibrated.

The calibration parameters are parameters for calibrating the sampling points to be calibrated, and comprise three values: gain k, bias b and calibration point p. Each calibration segment will correspond to one calibration parameter k, b and p.

Optionally, in this embodiment, the step of determining the calibration parameter corresponding to each segment to be calibrated based on the actual measurement value corresponding to the two end points of each segment to be calibrated and the sampling value to be calibrated may include:

determining sampling values to be calibrated corresponding to two end points of each section to be calibrated;

Based on the two end points, acquiring actual measured values corresponding to the two ends of each section to be calibrated;

And determining the calibration parameters corresponding to each section to be calibrated based on the actual measurement values corresponding to the two ends of each section to be calibrated and the sampling values to be calibrated.

The method for determining the calibration parameter values is as follows: as can be seen from step 204, the two end points of the calibration segment correspond to two calibration points. The calibration device is operated with a multimeter and samples, both of which are synchronized. When a set calibration point is measured, then the sample value and the table measurement value for that endpoint are obtained. When the sampling values and the table measured values of the two calibration points are obtained, the calibration parameters of the calibration segment can be calculated according to the sampling values and the table measured values of the two calibration points.

For example, if one calibration point is set to P1, the measured value of the point is z1, the sampling value is y1, the measured value of the other calibration point is set to P2, the measured value of the point is z2, and the sampling value is y2, then the calculation method of the calibration parameters k and b of the P1-P2 calibration segments is a binary system of equations as follows:

z1＝y1*k+b；

z2＝y2*k+b；

Each calibration segment corresponds to a pair of calibration parameters k and b. For example, in the example of 204, the curve to be calibrated is divided into five segments, and five calibration parameters, that is, five pairs of k and b, are calculated according to the table measurement values and sampling values corresponding to the calibration points of the two endpoints of each calibration segment respectively: k1, b1; k2 and b2; k3, b3; k4 and b4; k5, b5.

206. And calibrating the sampling value to be calibrated based on the calibration parameter to obtain a calibrated sampling value.

Before the sampling value to be calibrated is calibrated based on the calibration parameters, the calibration segment to which the sampling point to be calibrated belongs needs to be determined.

For example, the sampling values to be calibrated are respectively: -215310.5mA, -130189.2mA, -45570.9mA, 41237.7mA, 127613.4mA, 217112.6mA. If the set calibration points are: -300000mA, -150000mA, 0mA, 150000mA, 300000mA, the curve to be calibrated is divided into four calibration segments. The sampling value to be calibrated is-215310.5 mA which belongs to the calibration segment of-300000 mA to-150000 mA;

-130189.2mA and-45570.9 mA belong to the segment to be calibrated-150000 mA to 0mA;41237.7mA and 127613.4mA belong to the segments to be calibrated of 0 mA-150000 mA;217112.6mA belongs to the section to be calibrated of 150000 mA-300000 mA.

When knowing the calibration segment to which the sample point to be calibrated belongs and the calibration parameters k and b corresponding to the calibration segment, assuming that a certain sample point to be calibrated is y, the calibrated sample value is equal to k×y+b.

For example, in one embodiment, the sampling curve to be calibrated is divided into five calibration segments, each calibration segment having k and b of the calibration segment, i.e., the parameters of the five calibration segments are: k1, b1; k2 and b2; k3, b3; k4 and b4; k5, b5. Then, for the sampling point to be calibrated, after determining the segment to which the sampling point to be calibrated belongs, the calibration parameters of the segment can be used for calibration. For example, the current value of a sampling point to be calibrated is 20000mA, the parameter k to be calibrated of the calibration segment to which the sampling point to be calibrated belongs is equal to 1.003, b=40, and the value of the sampling point after calibration is 20000×1.01+40, which is equal to 20240mA.

Optionally, in this embodiment, after determining the calibration parameter corresponding to each segment to be calibrated based on the actual measurement value corresponding to the time point at each end of each segment to be calibrated and the sampling value to be calibrated, the step "may further include:

judging difference information between the calibrated sampling value and the actual measurement value through a power supply calibration module;

And judging the calibration eligibility based on the difference information.

The calibrated sampling value is calculated from the value of the sampling point to be calibrated and the calibration parameters k and b of the calibration segment to which the sampling point to be calibrated belongs. Whether the calibration is acceptable or not, the difference between the calibrated sampling value and the actual measurement value needs to be compared. When the difference is smaller than the preset range, the calibration is regarded as qualified.

For example, in one embodiment, the current value of a sampling point to be calibrated is-19417 mA, the k value of the calibration parameter of the calibration segment to which the sampling point belongs is 1.005, the b value is-40 mA, the corresponding measured value of the sampling point is-19526 mA, and the maximum deviation allowed by the design process is 5%. The calibrated value of the sampling point to be calibrated is equal to-19417 x 1.005-40mA, i.e. -19474.1mA. The deviation of this calibrated value from the measured value-19526 mA is | -19474.1-19526 |300000 x 100% = 1.73% >. Since the actual deviation value is 1.73% within the allowable maximum deviation of 5%, the calibration is acceptable.

As can be seen from the above, the embodiment can measure the current and voltage of the battery channel within a preset period of time to obtain an actual measurement value; based on a preset sampling method, sampling the current and the voltage of the battery channel in the preset time length to obtain a sampling value to be calibrated; constructing a sampling curve to be calibrated based on the sampling value to be calibrated; determining the number of segments to be calibrated required for calibrating the sampling value to be calibrated, and dividing the sampling curve to be calibrated into a plurality of segments to be calibrated based on the number of segments to be calibrated; determining a calibration parameter corresponding to each section to be calibrated based on the actual measurement value corresponding to the two end points of each section to be calibrated and the sampling value to be calibrated; and calibrating the sampling value to be calibrated based on the calibration parameter to obtain a calibrated sampling value. The application can dynamically adjust the current and voltage calibration segment number according to actual demands, and flexibly set the value of the calibration point through the upper computer to issue, so that power software does not need to contract the calibration segment number and the calibration point during encoding, thereby improving the current and voltage sampling precision.

The overall process will be described with reference to another flowchart 8 from the other side using a 5V300A power module as an example.

801. Based on the selection process, a number of calibration segments is determined.

For example, according to the selection process, the number of calibration segments is determined to be four, then clicking "increase the number of calibration segments" on the console of the upper computer as illustrated in fig. 6 creates five calibration segments, and the serial number value is 5.

802. Based on the selection process, the value of the specific calibration point is determined.

For example, in the example of 801, if the number of calibration segments is determined to be four, the number of calibration points is five. According to the selection process, the current ranges-300A are divided into four calibration segments by five calibration points. The current range of each segment may be non-uniform, such as setting the current values of five calibration points to:

-300000mA, -100000mA, 200000mA, 300000mA. The current range of each segment may be equal, such as setting the current values of five calibration points to: -300000mA, -150000mA, 0mA, 150000mA, 300000mA.

Taking the example that the current ranges of each segment are equal, the values of the five calibration points-300000 mA, -150000mA, 0mA, 150000mA, 300000mA are set in the "current setting" column corresponding to "serial number" in fig. 6 in order.

803. And starting a setting process, measuring a meter measurement value of the current by using a universal meter, and obtaining a sampling value of the current by using a sampling module.

And starting a setting process, and starting the system to work. And when the current sampling module works, the high-precision universal meter is used for measuring according to a preset time interval to obtain a plurality of meter measurement values at different moments, and the current sampling module is used for obtaining a plurality of sampling values at corresponding moments.

When the system works, when the multimeter measures the meter measurement value of the set calibration point, the sampling values at corresponding moments are synchronously obtained.

For example, continuing with the example in 802, the high-precision multimeter measures five calibration points-300000 mA, -150000mA, 0mA, 150000mA, and corresponding meter measurement values of 300000mA, -301196.8mA, -150470.5mA, 408.4mA, 150986.5mA, and 301386.8mA, and the corresponding sampling values of the five calibration points are: -300528.7mA, -150310.5mA, 239.5mA, 150633.1mA, 300816.8mA. The sampling value to be calibrated obtained by the sampling module is-215310.5 mA, -130189.2mA, -45570.9mA, 41237.7mA, 127613.4mA and 217112.6mA.

804. And calculating the calibration parameters corresponding to each calibration segment.

The calculation mode of the calibration parameters of each calibration segment needs to use the corresponding table measurement values and sampling values of the calibration points of the two end points of the calibration segment. Assuming that the measured values corresponding to the calibration points of the two end points of the calibration segment measured by the universal meter are z1 and z2, the sampled values corresponding to the calibration points of the two end points of the calibration segment are y1 and y2, and the calibration parameters of the calibration segment are k and b, the data satisfy the following equation set:

z1＝y1*k+b；

z2＝y2*k+b；

Since y1, y2, z1, z2 are all known values, the values of the calibration parameters k and b of the calibration segment can be obtained by solving this binary system of once equations.

Continuing with the example in 805, since the table measurement values and sampling values corresponding to the respective calibration points are known, the calibration parameters of the five calibration segments can be calculated according to the method of calculating the calibration parameters. For example, the calibration parameter k of the first calibration segment is calculated to be equal to 1.003 and b is calculated to be equal to 348mA.

805. Determining a calibration segment to which a sampling value to be calibrated belongs.

Calibration sample values require the use of calibration parameters k and b. Each calibration segment has a corresponding calibration parameter. Therefore, before calibrating the sample value to be calibrated, the calibration segment to which the sample value to be calibrated belongs needs to be determined.

The way to determine the calibration segment of the sample value to be calibrated is to compare which two calibration points the sample value to be calibrated is in.

For example, in the graph of fig. 7, the gray dots are the sample points to be calibrated, and the black large dots are the calibration points that divide the sample graph into four calibration segments. It is obvious in which calibration segment the sample point to be calibrated is.

Continuing with the example 803, dividing the sampled values to be calibrated-215310.5 mA, -130189.2mA, -45570.9mA, 41237.7mA, 127613.4mA, 217112.6mA by calibration segments, as follows: the calibration segment to which the sampling value to be calibrated-215310.5 mA belongs is-300000 mA to-150000 mA.

806. And calibrating the sampling value to be calibrated according to the calibration parameters of the section to be calibrated.

Continuing with the example in 805, the calibration segment to which the sample value to be calibrated-215310.5 mA belongs is known to be-300000 mA to-150000 mA. And calculated at 204, it is determined that the calibration parameter k for the calibration segment is equal to 1.003, and b is equal to 348mA. Therefore, the value after calibration of-215310.5 mA of the sample to be calibrated is equal to-215310.5 x 1.003+348= -216304.4mA.

807. And judging the qualification of the calibrated sampling value.

Continuing with the example in 806, the value of the sample to be calibrated-215310.5 mA calibrated is known to be equal to-215310.5 x 1.003+348= -216304.4mA. If the table value corresponding to this point is-216366.7 mA, the calibration deviation is | -216366.7mA- (-216304.4) |300000 x 100% = 2.07% >.

If the maximum allowable deviation of the process is set to 5%, the calibration result is acceptable since 2.07% is less than 5%.

In order to better implement the above method, the embodiment of the present application further provides a calibration device for a current and a voltage of a formation device, as shown in fig. 9, where the calibration device for a current and a voltage of a formation device may include a measurement unit 901, a sampling unit 902, a construction unit 903, a setting unit 904, a determination unit 905, and a calibration unit 906, as follows:

(1) Measuring unit 901

(2) Sampling unit 902

The sampling method is used for sampling the current and the voltage of the battery channel within a preset time length based on a preset sampling method to obtain a sampling value to be calibrated;

(3) Construction unit 903

(4) Setting unit 904

(5) Determination unit 905

(6) Calibration unit 906

The calibration unit is used for sequentially calculating and calibrating the sampling value to be calibrated based on the calibration parameters of the calibration segments; optionally, in some embodiments of the present application, the apparatus may further include a sampling subunit and a conversion subunit, as follows:

the sampling subunit is used for sampling the current and the voltage of the battery channel within a preset duration based on a preset sampling method to obtain an initial sampling value.

As can be seen from the above, in this embodiment, the measurement unit 901 may measure the current and voltage of the battery channel for a preset period of time to obtain an actual measurement value; sampling the current and the voltage of the battery channel in the preset time length by a sampling unit 902 based on a preset sampling method to obtain a sampling value to be calibrated; constructing a sampling curve to be calibrated based on the sampling values to be calibrated through a construction unit 903; determining the number of segments to be calibrated required for calibrating the sampling value to be calibrated through a setting unit 904, and dividing the sampling curve to be calibrated into a plurality of segments to be calibrated based on the number of segments to be calibrated; determining, by the determining unit 905, a calibration parameter corresponding to each segment to be calibrated based on the actual measurement values corresponding to the two end points of each segment to be calibrated and the sampling values to be calibrated; and calibrating the sampling value to be calibrated based on the calibration parameter by a calibration unit 906 to obtain a calibrated sampling value. The application can dynamically adjust the current and voltage calibration segment number according to actual demands, and flexibly set the value of the calibration point through the upper computer to issue, so that power software does not need to contract the calibration segment number and the calibration point during encoding, thereby improving the current and voltage sampling precision.

The embodiment of the application also provides an electronic device, as shown in fig. 10, which shows a schematic structural diagram of the electronic device according to the embodiment of the application, where the electronic device may be a terminal or a server, specifically:

the electronic device may include one or more processing cores 'processors 1001, one or more computer-readable storage media's memory 1002, a power supply 1003, and an input unit 1004, among other components. It will be appreciated by those skilled in the art that the electronic device structure shown in fig. 10 is not limiting of the electronic device and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components. Wherein:

The processor 1001 is a control center of the electronic device, connects various parts of the entire electronic device using various interfaces and lines, and performs various functions of the electronic device and processes data by running or executing software programs and/or modules stored in the memory 1002, and calling data stored in the memory 1002. Optionally, the processor 1001 may include one or more processing cores; preferably, the processor 1001 may integrate an application processor and a modem processor, wherein the application processor mainly processes an operating system, a user interface, an application program, and the like, and the modem processor mainly processes wireless communication. It will be appreciated that the modem processor described above may not be integrated into the processor 1001.

The memory 1002 may be used to store software programs and modules, and the processor 1001 executes various functional applications and data processing by executing the software programs and modules stored in the memory 1002. The memory 1002 may mainly include a storage program area that may store an operating system, application programs required for at least one function (such as a sound playing function, an image playing function, etc.), and a storage data area; the storage data area may store data created according to the use of the electronic device, etc. In addition, memory 1002 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, the memory 1002 may also include a memory controller to provide the processor 1001 with access to the memory 1002.

The electronic device further comprises a power supply 1003 for powering the various components, preferably the power supply 1003 is logically connected to the processor 1001 by a power management system, whereby charging, discharging, and power consumption management functions are performed by the power management system. The power supply 1003 may also include one or more of any of a direct current or alternating current power supply, a recharging system, a power failure detection circuit, a power converter or inverter, a power status indicator, and the like.

The electronic device may also include an input unit 1004, which input unit 1004 may be used to receive input numeric or character information and to generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control.

Although not shown, the electronic device may further include a display unit or the like, which is not described herein. In particular, in this embodiment, the processor 1001 in the electronic device loads executable files corresponding to the processes of one or more application programs into the memory 1002 according to the following instructions, and the processor 1001 executes the application programs stored in the memory 1002, so as to implement various functions as follows: measuring the current and voltage of the battery channel within a preset time length to obtain an actual measured value; based on a preset sampling method, sampling the current and the voltage of the battery channel in the preset time length to obtain a sampling value to be calibrated; constructing a sampling curve to be calibrated based on the sampling value to be calibrated; determining the number of segments to be calibrated required for calibrating the sampling value to be calibrated, and dividing the sampling curve to be calibrated into a plurality of segments to be calibrated based on the number of segments to be calibrated; determining a calibration parameter corresponding to each section to be calibrated based on the actual measurement value corresponding to the two end points of each section to be calibrated and the sampling value to be calibrated; and calibrating the sampling value to be calibrated based on the calibration parameter to obtain a calibrated sampling value.

The specific implementation of each operation above may be referred to the previous embodiments, and will not be described herein.

Those of ordinary skill in the art will appreciate that all or a portion of the steps of the various methods of the above embodiments may be performed by instructions, or by instructions controlling associated hardware, which may be stored in a computer-readable storage medium and loaded and executed by a processor.

To this end, embodiments of the present application provide a computer readable storage medium having stored therein a plurality of instructions capable of being loaded by a processor to perform the steps of any of the current-voltage calibration methods provided by embodiments of the present application. For example, the instructions may perform the steps of:

Measuring the current and voltage of the battery channel within a preset time length to obtain an actual measured value; based on a preset sampling method, sampling the current and the voltage of the battery channel in the preset time length to obtain a sampling value to be calibrated; constructing a sampling curve to be calibrated based on the sampling value to be calibrated; determining the number of segments to be calibrated required for calibrating the sampling value to be calibrated, and dividing the sampling curve to be calibrated into a plurality of segments to be calibrated based on the number of segments to be calibrated; determining a calibration parameter corresponding to each section to be calibrated based on the actual measurement value corresponding to the two end points of each section to be calibrated and the sampling value to be calibrated; and calibrating the sampling value to be calibrated based on the calibration parameter to obtain a calibrated sampling value.

Wherein the computer-readable storage medium may comprise: read Only Memory (ROM), random access memory (RAM, random Access Memory), magnetic or optical disk, and the like.

Because the instructions stored in the computer readable storage medium can execute the steps in any current-voltage calibration method provided by the embodiments of the present application, the beneficial effects that any current-voltage calibration method provided by the embodiments of the present application can achieve can be achieved, which are detailed in the previous embodiments and are not described herein.

According to one aspect of the present application, there is provided a computer program product or computer program comprising computer instructions stored in a computer readable storage medium. The computer instructions are read from the computer-readable storage medium by a processor of a computer device, which executes the computer instructions, causing the computer device to perform the methods provided in various alternative implementations of the formation device current voltage calibration aspects described above.

The foregoing has described in detail a current-voltage calibration method and related devices provided by embodiments of the present application, and specific examples have been applied herein to illustrate the principles and embodiments of the present application, the above examples being provided only to assist in understanding the method and core idea of the present application; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, the present description should not be construed as limiting the present application.

Claims

1. A method for calibrating a current voltage of a chemical vapor deposition apparatus, comprising:

2. The method for calibrating current and voltage of a formation device according to claim 1, wherein the step of sampling the current and voltage of the battery channel within the preset time period to obtain a sample value to be calibrated based on a preset sampling method includes:

Based on a preset sampling method, sampling the current and the voltage of the battery channel within the preset time length to obtain an initial sampling value;

3. The method for calibrating current and voltage of a chemical vapor deposition apparatus according to claim 2, wherein the step of linearly converting the initial sampling value to obtain a sampling value to be calibrated comprises:

determining a linear conversion parameter corresponding to the preset sampling method;

4. The method according to claim 1, wherein determining the number of segments to be calibrated required for calibrating the sampling value to be calibrated, and dividing the sampling curve to be calibrated into a plurality of segments to be calibrated based on the number of segments to be calibrated, comprises:

5. The method according to claim 4, wherein setting a calibration point based on the number of segments to be calibrated and dividing the sampling curve to be calibrated into a plurality of segments to be calibrated based on the calibration point, comprises:

Based on a battery production process, determining calibration points based on the number of segments to be calibrated;

And dividing the sampling curve to be calibrated into a plurality of segments to be calibrated based on the calibration points and the current voltage values corresponding to each calibration point.

6. The method according to claim 1, wherein determining the calibration parameter corresponding to each segment to be calibrated based on the actual measurement value corresponding to each end point of each segment to be calibrated and the sampling value to be calibrated, comprises:

determining the sampling values to be calibrated corresponding to two end points of each section to be calibrated;

Acquiring the actual measured values corresponding to the two ends of each section to be calibrated based on the endpoints;

7. The method for calibrating a current and a voltage of a chemical vapor deposition apparatus according to claim 1, wherein after calibrating the sampling value to be calibrated based on the calibration parameter, the method further comprises:

And judging the calibration qualification based on the difference information.

8. A forming apparatus current-voltage calibration device, comprising:

And the calibration unit is used for calibrating the sampling value to be calibrated based on the calibration parameter to obtain a calibrated sampling value.

9. An electronic device comprising a memory and a processor; the memory stores an application program, and the processor is configured to execute the application program in the memory to perform the operations in the formation device current voltage calibration method according to any one of claims 1 to 7.

10. A computer readable storage medium storing a plurality of instructions adapted to be loaded by a processor to perform the steps in the method of calibrating a chemical plant current voltage of any of claims 1 to 7.