CN113566765B - Battery diaphragm thickness measuring method and device, electronic equipment and storage medium - Google Patents
Battery diaphragm thickness measuring method and device, electronic equipment and storage medium Download PDFInfo
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- CN113566765B CN113566765B CN202110837555.1A CN202110837555A CN113566765B CN 113566765 B CN113566765 B CN 113566765B CN 202110837555 A CN202110837555 A CN 202110837555A CN 113566765 B CN113566765 B CN 113566765B
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000003860 storage Methods 0.000 title claims abstract description 17
- 238000007906 compression Methods 0.000 claims description 17
- 230000006835 compression Effects 0.000 claims description 12
- 238000000691 measurement method Methods 0.000 claims description 9
- 238000005259 measurement Methods 0.000 abstract description 29
- 239000012528 membrane Substances 0.000 description 30
- 238000012360 testing method Methods 0.000 description 20
- 238000010586 diagram Methods 0.000 description 9
- 230000006870 function Effects 0.000 description 7
- 238000003475 lamination Methods 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000007731 hot pressing Methods 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
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- 230000007613 environmental effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/08—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness for measuring thickness
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The embodiment of the application discloses a battery diaphragm thickness measuring method, a device, electronic equipment and a storage medium. The method comprises the following steps: the thickness of the diaphragm is determined according to the thickness of the to-be-measured unit, the thickness of the positive electrode plate and the thickness of the negative electrode plate. In the embodiment of the application, the unit to be measured is determined in the battery, the thicknesses of the positive electrode plate and the negative electrode plate in the unit to be measured are determined first, then the thickness of the unit to be measured is obtained, and the thicknesses of the positive electrode plate and the negative electrode plate are subtracted from the thickness of the unit to be measured, so that the accurate measurement of the thickness of the battery diaphragm is realized.
Description
Technical Field
The application relates to the technical field of batteries, in particular to a battery diaphragm thickness measuring method, a device, electronic equipment and a storage medium.
Background
In the prior art, the lithium ion battery is widely applied due to the characteristics of high energy density, good cycle performance, high voltage, no memory effect, environmental friendliness and the like. For example, lithium ion batteries can be used for devices such as mobile phones, computers, electric automobiles and the like. The existing battery technology is not enough to meet the requirement of people on battery performance, and the battery capacity in the device is often increased by increasing the energy density of the battery, so that the size of each component in the battery needs to be obtained.
However, the battery is subjected to compression treatment during the production process of the battery, which may cause the volume of some components inside the battery to change, and eventually, the measurement data of some components may be inaccurate.
Disclosure of Invention
The embodiment of the application provides a battery diaphragm thickness measuring method, a battery diaphragm thickness measuring device, electronic equipment and a storage medium. The thickness measuring method of the battery diaphragm can accurately measure the thickness of the diaphragm in the battery.
In a first aspect, an embodiment of the present application provides a method for measuring a thickness of a separator of a battery, where the battery includes a positive electrode plate, a separator, and a negative electrode plate, and the method includes:
determining a unit to be detected, which is formed by the diaphragm, the positive pole piece and the negative pole piece in the battery;
acquiring the thickness of the positive pole piece and the thickness of the negative pole piece in the unit to be detected;
measuring the thickness of the unit to be measured;
and determining the thickness of the diaphragm according to the thickness of the unit to be detected, the thickness of the positive electrode plate and the thickness of the negative electrode plate.
In a second aspect, embodiments of the present application provide a battery separator thickness measurement device, where the battery includes a positive electrode sheet, a separator, and a negative electrode sheet, the device includes:
the determining module is used for determining a unit to be detected, which is formed by a diaphragm, a positive pole piece and a negative pole piece in the battery;
the acquisition module is used for acquiring the thickness of the positive pole piece and the thickness of the negative pole piece in the unit to be detected;
the measuring module is used for measuring the thickness of the unit to be measured;
and the calculation module is used for determining the thickness of the diaphragm according to the thickness of the unit to be detected, the thickness of the positive pole piece and the thickness of the negative pole piece.
In a third aspect, embodiments of the present application provide a storage medium storing a plurality of instructions adapted to be loaded by a processor to perform steps in a method for measuring a thickness of a battery separator provided by embodiments of the present application.
In a fourth aspect, embodiments of the present application provide an electronic device having a memory storing executable program code, and a processor coupled to the memory, the processor invoking the executable program code stored in the memory to perform steps in a method for measuring battery separator thickness provided by embodiments of the present application.
In the embodiment of the application, the thickness of the diaphragm is determined according to the thickness of the to-be-measured unit, the thickness of the positive electrode plate and the thickness of the negative electrode plate in the to-be-measured unit are obtained through determining the to-be-measured unit consisting of the diaphragm, the positive electrode plate and the negative electrode plate in the battery, the thickness of the to-be-measured unit is measured, and finally the thickness of the diaphragm is determined according to the thickness of the to-be-measured unit, the thickness of the positive electrode plate and the thickness of the negative electrode plate. In the embodiment of the application, the unit to be measured is determined in the battery, the thicknesses of the positive electrode plate and the negative electrode plate in the unit to be measured are determined firstly at different positions of the unit to be measured in the battery, then the thickness of the unit to be measured is obtained, and due to different compression amounts at different positions in the battery, the thickness measurement is carried out on the unit to be measured at different positions, and finally the thicknesses of the positive electrode plate and the negative electrode plate are subtracted from the thickness of the unit to be measured, so that the accurate measurement of the thickness of the battery diaphragm is realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, 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 schematic view of a first process of a method for measuring thickness of a battery separator according to an embodiment of the present application.
Fig. 2 is a schematic diagram of a second flow of a method for measuring thickness of a battery separator according to an embodiment of the present application.
Fig. 3 is a schematic diagram of a lamination mode of a battery provided in an embodiment of the present application.
Fig. 4 is a schematic diagram of the lamination of the adjusted battery provided in the embodiment of the present application.
Fig. 5 is another schematic lamination diagram of an adjusted battery provided in an embodiment of the present application.
Fig. 6 is a schematic structural view of a battery separator thickness measuring device according to an embodiment of the present application.
Fig. 7 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 application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
In the related art, a finished battery used daily is provided with a shell, each component of the battery is arranged in the shell, and in order to improve the energy density of the battery and the space utilization rate in the shell, the size of each component in the battery needs to be precisely mastered, so that the finished battery with the energy density and the space utilization rate meeting the requirements can be designed and produced.
The current measurement method is to measure the total thickness of the battery, then remove the thickness of the positive pole piece and the negative pole piece, and then calculate the thickness of the diaphragm. However, in the compression process of the battery, such as hot pressing, the pressure of different parts of the battery is uneven, so that the compression amounts of partial diaphragms are different, the thicknesses of the diaphragms at different parts are different, and the measured thickness of the diaphragms is not accurate.
In order to solve the technical problems, the embodiment of the application provides a method for measuring the thickness of a battery diaphragm.
Referring to fig. 1, fig. 1 is a schematic flow chart of a method for measuring thickness of a battery separator according to an embodiment of the disclosure. The thickness measuring method of the battery diaphragm can accurately measure the thickness of the diaphragm in the battery. The battery separator thickness measurement method may include the steps of:
110. and determining a unit to be tested consisting of the diaphragm, the positive pole piece and the negative pole piece in the battery.
The battery is provided with a positive pole piece, a negative pole piece and a diaphragm, wherein in the minimum lamination mode in the battery, the positive pole piece and the negative pole piece are respectively arranged on two opposite sides of one diaphragm, and the plurality of positive pole pieces, the negative pole pieces and the diaphragms are laminated in the lamination mode, so that the battery is formed.
In some embodiments, the unit to be tested may include a membrane layer, where the opposite sides of the membrane layer are respectively provided with a positive electrode plate and a negative electrode plate, so as to form a unit to be tested that only includes one membrane layer.
The unit to be tested may comprise a plurality of layers of membranes, only one pole piece between each adjacent two membranes, and the polarity of the pole pieces arranged on opposite sides of each membrane is different, for example, a pole piece with positive polarity is arranged on one side of the membrane, and a pole piece with negative polarity is arranged on the opposite side of the membrane.
120. And obtaining the thickness of the positive pole piece and the thickness of the negative pole piece in the unit to be detected.
In order to accurately measure the thickness of the diaphragm, the thickness of each positive pole piece and the thickness of each negative pole piece in the unit to be measured can be measured first. For example, the thickness of the positive pole piece and the negative pole piece can be measured by adopting a micrometer and a ten-thousandth ruler, and the thickness of the positive pole piece and the negative pole piece can be continuously measured by adopting a laser thickness gauge. And finally determining the thickness of each positive pole piece and the thickness of each negative pole piece.
130. The thickness of the unit under test is measured.
In some embodiments, before measuring the thickness of the unit to be measured, the battery composed of the plurality of positive electrode pieces, the plurality of negative electrode pieces and the plurality of diaphragms needs to be compressed, for example, the battery is compressed by adopting a hot pressing method, so that the compressed battery has smaller volume.
In the compression process, some materials in the diaphragm are softer, so that volume change is easy to occur in the compression process, the diaphragm can be bonded with the adjacent pole pieces, but the thicknesses of the positive pole piece and the negative pole piece cannot be changed.
After the battery is compressed, the unit to be measured can be determined in the compressed battery, and then the thickness of the unit to be measured is measured.
140. And determining the thickness of the diaphragm according to the thickness of the unit to be detected, the thickness of the positive pole piece and the thickness of the negative pole piece.
It can be understood that after the thickness of the unit to be measured is obtained, the thicknesses of all the positive electrode pieces and all the negative electrode pieces are removed, and the remaining thickness is the thickness of the separator in the unit to be measured. The thickness of all diaphragms in the unit to be measured can be obtained by subtracting the thickness of all positive pole pieces and the thickness of all negative pole pieces from the thickness of the unit to be measured.
The thickness of a single membrane is then obtained by dividing the thickness of all membranes by the total number of membranes in the unit under test.
In the embodiment of the application, the thickness of the diaphragm is determined according to the thickness of the to-be-measured unit, the thickness of the positive electrode plate and the thickness of the negative electrode plate in the to-be-measured unit are obtained through determining the to-be-measured unit consisting of the diaphragm, the positive electrode plate and the negative electrode plate in the battery, the thickness of the to-be-measured unit is measured, and finally the thickness of the diaphragm is determined according to the thickness of the to-be-measured unit, the thickness of the positive electrode plate and the thickness of the negative electrode plate. In the embodiment of the application, the unit to be measured is determined in the battery, the thicknesses of the positive electrode plate and the negative electrode plate in the unit to be measured are determined firstly at different positions of the unit to be measured in the battery, then the thickness of the unit to be measured is obtained, and due to different compression amounts at different positions in the battery, the thickness measurement is carried out on the unit to be measured at different positions, and finally the thicknesses of the positive electrode plate and the negative electrode plate are subtracted from the thickness of the unit to be measured, so that the accurate measurement of the thickness of the battery diaphragm is realized.
For a more detailed understanding of the method for measuring the thickness of the battery separator according to the embodiments of the present application, refer to fig. 2, and fig. 2 is a schematic diagram of a second flow of the method for measuring the thickness of the battery separator according to the embodiments of the present application.
210. And determining a region to be detected in the battery, and forming a diaphragm, a positive pole piece and a negative pole piece in the region to be detected into a unit to be detected.
In some embodiments, the battery may be pre-treated prior to determining the unit to be tested by stacking the positive electrode tab, the negative electrode tab, and the separator so that the initial form of the battery is formed.
For example, the positive electrode sheet, the negative electrode sheet, and the separator may be wound in one direction to form a stacked layer having three pairs of oppositely disposed faces, wherein two pairs of oppositely disposed faces are planar and one pair of oppositely disposed faces are cambered, and the two opposite cambered areas may be cut out to form a stacked battery.
In another mode, the positive pole piece, the negative pole piece and the diaphragm are stacked layer by layer in a stacking mode, each layer is relatively independent, and when the assemblies to be stacked are stacked, a stacked battery is formed.
Preferably, the measurement of the thickness of the separator of the stacked battery is more accurate.
In some embodiments, the number of the diaphragms in the battery can be obtained first, and because the lamination modes of the battery are that the positive pole pieces and the negative pole pieces are respectively arranged on the two opposite sides of the diaphragms, the total number of layers of the diaphragms, the positive pole pieces and the negative pole pieces stacked in the battery can be determined through the number of the diaphragms in the battery.
For example, if the number of separators in the battery is M and M is an odd number, the battery may include M separators, (m+1)/2 positive electrodes, (m+1)/2 negative electrodes, and the total number of stacked layers in the battery is 2m+1. If M is an even number, the battery may include an M-layer separator, an M/2-layer positive electrode, an M/2+1-layer negative electrode, or an M-layer separator, an M/2-layer negative electrode, an M/2+1-layer positive electrode.
In order to ensure accurate measurement of the thickness of the diaphragm of the unit to be measured, the total number of layers of the diaphragm, the positive pole piece and the negative pole piece in the unit to be measured cannot exceed half of the total number of layers of the diaphragm, the positive pole piece and the negative pole piece in the battery.
In some embodiments, a region to be measured in the battery where the thickness measurement of the separator is required may be determined, and then the separator, the positive electrode tab, and the negative electrode tab stacked in the region to be measured may be determined as a unit to be measured. A plurality of units to be tested may be further disposed, for example, a single unit to be tested may be disposed near the separator outside the cell stacking region, and a corresponding unit to be tested may be disposed near the middle of the cell stacking region.
In order to ensure accurate measurement of the membrane thickness of the units to be measured, the number of membranes in each unit to be measured is less than or equal to five. And the number of cells to be tested in the battery is less than or equal to five.
220. And adjusting the positions of the pole piece and the diaphragm which are outside the unit to be detected and are adjacent to the unit to be detected, and obtaining the adjusted battery.
Referring to fig. 3 together, fig. 3 is a schematic diagram illustrating a stacking manner of a battery according to an embodiment of the present disclosure. Fig. 3 shows an original battery stack structure, in which A1, A2 are positive electrode sheets, B1, B2, B3, B4 are separators, and C1, C2 are negative electrode sheets.
After the unit under test is determined, adjustments to the stack structure of the cells are required. For example, the polarity of the outermost pole piece of the unit under test may be determined, the polarity including a positive polarity and a negative polarity, and then the separator outside the unit under test and adjacent to the unit under test is adjusted to the same pole piece as the outermost pole piece polarity.
Specifically, as shown in fig. 4, fig. 4 is a schematic lamination diagram of the adjusted battery according to the embodiment of the present application.
Referring to fig. 3 and 4, the pole piece on the upper side of the unit to be tested is a positive pole piece, the positive pole piece A1 can be adjusted to be adjacent to the positive pole piece on the upper side of the unit to be tested, the diaphragm B1 is adjusted to be adjacent to the diaphragm B2, and the position of the negative pole piece C1 is adjusted to be the original position of the positive pole piece A1.
The pole piece at the lower side of the unit to be detected is a negative pole piece, the negative pole piece C2 can be adjusted to be adjacent to the negative pole piece at the lower side of the unit to be detected, the diaphragm B3 is adjusted to be adjacent to the diaphragm B4, and the position of the positive pole piece A2 is adjusted to be the original position of the negative pole piece C2.
The polarity of the pole piece at the outermost side of the unit to be detected is the same as that of the adjacent pole piece through the adjustment of the positions of the adjacent pole pieces and the diaphragm of the unit to be detected.
As shown in fig. 5, fig. 5 is another schematic stacked view of the modified battery provided in the embodiment of the present application.
The unit to be measured can also comprise a plurality of diaphragms, and the adjustment of the adjacent pole pieces of the unit to be measured is similar to the adjustment of the positions of the pole pieces in fig. 4, namely, the polarity of the pole piece at the outermost side of the unit to be measured is the same as the polarity of the adjacent pole pieces through the adjustment of the positions of the adjacent pole pieces and the diaphragms of the unit to be measured.
With specific reference to fig. 3 and 5, except for the unit to be measured, the adjacent pole piece of the unit to be measured is adjusted, the pole piece on the upper side of the unit to be measured is the positive pole piece, the positive pole piece A1 can be adjusted to be adjacent to the positive pole piece on the upper side of the unit to be measured, the diaphragm B1 is adjusted to be adjacent to the diaphragm B2, and the position of the negative pole piece C1 is adjusted to be the original position of the positive pole piece A1.
The pole piece at the lower side of the unit to be detected is a negative pole piece, the negative pole piece C2 can be adjusted to be adjacent to the negative pole piece at the lower side of the unit to be detected, the diaphragm B3 is adjusted to be adjacent to the diaphragm B4, and the position of the positive pole piece A2 is adjusted to be the original position of the negative pole piece C2.
In some embodiments, the unit under test in the battery may include a plurality of units under test, and the interval between each unit under test may be equal.
230. And compressing the adjusted battery to obtain a compressed battery.
After the adjusted battery is obtained, the battery formed by the plurality of positive pole pieces, the plurality of negative pole pieces and the plurality of diaphragms of the adjusted battery is compressed, for example, the battery is compressed in a hot pressing mode, so that the compressed battery has smaller volume.
In some embodiments, the compression amount of the battery is different at different positions during the compression process, so the unit to be tested may be set at different positions in the battery before the compression process is performed on the battery. For example, a unit to be tested is arranged in the battery at intervals, for example, corresponding units to be tested are respectively arranged at the upper part, the lower part and the middle part of the battery.
240. And determining a unit to be measured in the battery after compression treatment, and measuring the thickness of the unit to be measured.
The thickness of the unit to be measured can be measured by adopting a micrometer and a ten-thousandth ruler, and the thickness of the unit to be measured can be measured continuously by adopting a laser thickness meter.
In some embodiments, the thickness of the unit under test measured by multiple measurements may be averaged to reduce measurement errors during the measurement.
250. And determining the thickness of the diaphragm according to the thickness of the unit to be detected, the thickness of the positive pole piece and the thickness of the negative pole piece.
After the thickness of the unit to be measured is obtained, the thickness of all positive pole pieces and the thickness of all negative pole pieces are removed, and the remaining thickness is the thickness of the diaphragm in the unit to be measured. The thickness of all diaphragms in the unit to be measured can be obtained by subtracting the thickness of all positive pole pieces and the thickness of all negative pole pieces from the thickness of the unit to be measured.
The thickness of a single membrane is then obtained by dividing the thickness of all membranes by the total number of membranes in the unit under test.
It should be noted that, because the unit to be measured is set at different positions of the battery in the embodiment of the application, even after the battery is compressed, the thickness variation of the positive electrode plate and the negative electrode plate is very small, even no thickness variation occurs, the thickness of the unit to be measured at different positions can be measured, then the thickness of the corresponding positive electrode plate and negative electrode plate in the unit to be measured is subtracted by the thickness of the unit to be measured, the thickness of the diaphragm corresponding to the unit to be measured can be accurately obtained, and the thickness of the diaphragm of each unit to be measured is obtained by the mode, so that the thickness of the diaphragm in the battery can be accurately measured.
In the embodiment of the application, the number of the diaphragms in the battery is determined, the units to be detected consisting of the diaphragms, the positive pole piece and the negative pole piece are determined according to the number of the diaphragms in the battery, then the positions of the pole pieces and the diaphragms adjacent to the units to be detected are adjusted to obtain an adjusted battery, and then the adjusted battery is subjected to compression treatment to obtain the battery after compression treatment. And determining a unit to be measured in the battery after compression treatment, measuring the thickness of the unit to be measured, and finally determining the thickness of the diaphragm according to the thickness of the unit to be measured, the thickness of the positive pole piece and the thickness of the negative pole piece. The thickness of the diaphragm can be accurately obtained by determining the thickness of the positive pole piece in the unit to be measured and then determining the thickness of the unit to be measured after compression treatment.
To further illustrate the accuracy of the battery separator measurement method provided by the embodiments of the present application. The battery comprises 70 layers of positive electrode plates, 72 layers of negative electrode plates and 158 layers of diaphragms. The battery was subjected to a hot press treatment at a temperature of 90℃for 100 seconds under a pressure of 5000kg.
In the measurement mode provided by the application, the battery is divided into five different areas, the units to be measured are respectively arranged in the five different areas, and then the positions of the pole pieces and the positions of the diaphragms of the units to be measured are adjusted. The battery was then subjected to a hot press treatment, and then a separator thickness measurement was performed. See table 1 for details:
TABLE 1
As can be seen from Table 1, in the present application, in the same test area and in the results of the multiple experiments, the measured thickness of the diaphragm is substantially the same, no large error occurs, and the measurement of the thickness of the diaphragm is more accurate.
Please continue to look at table 2, table 2 is the test data for the thickness of the separator measured in the prior art. Table 2 shows the following:
TABLE 2
As can be seen from table 2, the separator thickness of the battery was tested by the prior art, and the difference in measured separator thickness was large in different experiments, for example, the separator thickness measured in the 3 rd experiment was 12.39 μm and the separator thickness measured in the 9 th experiment was 15.00 μm.
For the mode of measuring the membrane thickness in the battery among the prior art, this application can be more accurate measure the thickness of membrane in the battery.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a device for measuring thickness of a battery separator according to an embodiment of the present application. The battery separator thickness measuring apparatus 300 includes: a determining module 310, an acquiring module 320, a measuring module 330, a calculating module 340.
The determining module 310 is configured to determine a unit to be tested formed by the separator, the positive electrode plate and the negative electrode plate in the battery.
In some embodiments, the unit to be tested may include a membrane layer, where the opposite sides of the membrane layer are respectively provided with a positive electrode plate and a negative electrode plate, so as to form a unit to be tested that only includes one membrane layer.
The unit to be tested may comprise a plurality of layers of membranes, only one pole piece between each adjacent two membranes, and the polarity of the pole pieces arranged on opposite sides of each membrane is different, for example, a pole piece with positive polarity is arranged on one side of the membrane, and a pole piece with negative polarity is arranged on the opposite side of the membrane.
The determining module 310 may determine the units under test in the battery, where the number of diaphragms in each unit under test cannot exceed five in order to ensure accurate measurement of the diaphragm thickness of the unit under test. And the number of cells to be tested in the battery cannot exceed five.
After the determining module 310 determines the unit to be measured, the positions of the pole piece and the diaphragm adjacent to the unit to be measured need to be adjusted, so as to obtain an adjusted battery. For example, by providing an adjustment module in the battery separator thickness measurement device 300, by determining the polarity of the outermost pole piece of the unit under test, the polarity including the positive polarity and the negative polarity, then adjusting the separator adjacent to the unit under test to the pole piece having the same polarity as the outermost pole piece.
And the obtaining module 320 is configured to obtain the thickness of the positive electrode plate and the thickness of the negative electrode plate in the unit to be tested.
In order to accurately measure the thickness of the separator, the obtaining module 320 may first measure the thickness of each positive electrode tab and the thickness of each negative electrode tab in the unit to be measured. For example, the thickness of the positive pole piece and the negative pole piece can be measured by adopting a micrometer and a ten-thousandth ruler, and the thickness of the positive pole piece and the negative pole piece can be continuously measured by adopting a laser thickness gauge. And finally determining the thickness of each positive pole piece and the thickness of each negative pole piece.
And the measurement module 330 is used for measuring the thickness of the unit to be measured.
After the positions of the pole piece and the diaphragm of the unit to be measured are adjusted, the adjusted battery is required to be compressed. And then determining the unit to be tested in the battery after compression processing.
The measuring module 330 may measure the thickness of the unit to be measured by using a micrometer and a ten-thousandth ruler, and may also measure the thickness of the unit to be measured continuously by using a laser thickness gauge.
In some embodiments, the measurement module 330 may average the thickness of the unit under test measured for multiple measurements, thereby reducing measurement errors during the measurements.
And the calculating module 340 is configured to determine the thickness of the diaphragm according to the thickness of the unit to be measured, the thickness of the positive electrode plate, and the thickness of the negative electrode plate.
After obtaining the thickness of the unit to be measured, the calculation module 340 removes the thickness of all positive pole pieces and the thickness of all negative pole pieces, and the remaining thickness is the thickness of the membrane in the unit to be measured. The calculating module 340 may obtain the thickness of all the diaphragms in the unit to be measured by subtracting the thickness of all the positive electrode pieces and the thickness of all the negative electrode pieces from the thickness of the unit to be measured.
The thickness of a single membrane is then obtained by dividing the thickness of all membranes by the total number of membranes in the unit under test.
In the embodiment of the application, the thickness of the diaphragm is determined according to the thickness of the to-be-measured unit, the thickness of the positive electrode plate and the thickness of the negative electrode plate in the to-be-measured unit are obtained through determining the to-be-measured unit consisting of the diaphragm, the positive electrode plate and the negative electrode plate in the battery, the thickness of the to-be-measured unit is measured, and finally the thickness of the diaphragm is determined according to the thickness of the to-be-measured unit, the thickness of the positive electrode plate and the thickness of the negative electrode plate. In the embodiment of the application, the unit to be measured is determined in the battery, the thicknesses of the positive electrode plate and the negative electrode plate in the unit to be measured are determined first, then the thickness of the unit to be measured is obtained, and the thicknesses of the positive electrode plate and the negative electrode plate are subtracted from the thickness of the unit to be measured, so that the accurate measurement of the thickness of the battery diaphragm is realized.
Accordingly, the embodiments of the present application also provide an electronic device, as shown in fig. 7, which may include a memory 401 including one or more computer readable storage media, an input unit 402, a sensor 403, a processor 404 including one or more processing cores, and a power supply 405. It will be appreciated by those skilled in the art that the electronic device structure shown in fig. 7 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 memory 401 may be used to store software programs and modules, and the processor 404 performs various functional applications and data processing by executing the software programs and modules stored in the memory 401. The memory 401 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, application programs required for at least one function (such as a measurement function), and the like; the storage data area may store data created from the use of the electronic device (such as measurement data), and the like. In addition, memory 401 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 401 may further include a memory controller to provide access to the memory 401 by the processor 404 and the input unit 402.
The input unit 402 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. Specifically, the user may input a measurement instruction; the touch controller receives touch information from the touch detection device and converts it into touch point coordinates, which are then sent to the processor 404, and can receive commands from the processor 404 and execute them. In addition, touch sensitive surfaces may be implemented in a variety of types, such as resistive, capacitive, infrared, and surface acoustic waves. In addition to the touch-sensitive surface, the input unit 402 may also include other input devices. In particular, other input devices may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, mouse, joystick, etc.
The electronic device may further comprise at least one sensor 403, such as a laser sensor, by which the measurement of the positive pole piece, the negative pole piece, the separator in the battery may be achieved.
The processor 404 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 401, and calling data stored in the memory 401, thereby performing overall monitoring of the electronic device. Optionally, processor 404 may include one or more processing cores; preferably, the processor 404 may integrate an application processor that primarily handles operating systems, user interfaces, applications, etc., with a modem processor that primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 404.
The electronic device also includes a power supply 405 (e.g., a battery) for powering the various components, which may be logically connected to the processor 404 by a power management system, such as to perform functions such as managing charge, discharge, and power consumption by the power management system. The power supply 405 may also include one or more of any components, such as 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.
Although not shown, the electronic device may further include a camera, a bluetooth module, etc., which will not be described herein. In particular, in this embodiment, the processor 404 in the electronic device loads executable files corresponding to the processes of one or more application programs into the memory 401 according to the following instructions, and the processor 404 executes the application programs stored in the memory 401, so as to implement various functions:
determining a unit to be tested consisting of a diaphragm, a positive pole piece and a negative pole piece in the battery;
acquiring the thickness of the positive pole piece and the thickness of the negative pole piece in the unit to be detected;
measuring the thickness of the unit to be measured;
and determining the thickness of the diaphragm according to the thickness of the unit to be detected, the thickness of the positive electrode plate and the thickness of the negative electrode plate.
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 storage medium having stored therein a plurality of instructions capable of being loaded by a processor to perform steps in any of the battery separator measurement methods provided by embodiments of the present application. For example, the instructions may perform the steps of:
determining a unit to be tested consisting of a diaphragm, a positive pole piece and a negative pole piece in the battery;
acquiring the thickness of the positive pole piece and the thickness of the negative pole piece in the unit to be detected;
measuring the thickness of the unit to be measured;
and determining the thickness of the diaphragm according to the thickness of the unit to be detected, the thickness of the positive electrode plate and the thickness of the negative electrode plate.
The specific implementation of each operation above may be referred to the previous embodiments, and will not be described herein.
Wherein the storage medium may include: read Only Memory (ROM), random access Memory (RAM, random Access Memory), magnetic or optical disk, and the like.
The steps in any battery diaphragm measurement method provided in the embodiments of the present application may be executed due to the instructions stored in the storage medium, so that the beneficial effects that any battery diaphragm measurement method provided in the embodiments of the present application may be achieved, which are detailed in the previous embodiments and are not repeated herein.
The foregoing has described in detail the method, apparatus electronic device and storage medium for measuring a battery separator provided in the embodiments of the present application, and specific examples have been applied to illustrate the principles and embodiments of the present application, where the foregoing examples are only for aiding in understanding the method and core idea of the present application; meanwhile, those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, and the present description should not be construed as limiting the present application in view of the above.
Claims (7)
1. The battery diaphragm thickness measuring method is characterized in that the battery comprises a positive pole piece, a diaphragm and a negative pole piece, and comprises the following steps:
determining a unit to be detected, which is formed by the diaphragm, the positive pole piece and the negative pole piece in the battery;
acquiring the thickness of the positive pole piece and the thickness of the negative pole piece in the unit to be detected;
measuring the thickness of the unit to be measured;
determining the thickness of the diaphragm according to the thickness of the unit to be detected, the thickness of the positive electrode plate and the thickness of the negative electrode plate;
after the unit to be measured consisting of the diaphragm, the positive electrode plate and the negative electrode plate is determined, the method further comprises:
the positions of the pole piece and the diaphragm outside the unit to be detected and adjacent to the unit to be detected are adjusted to obtain an adjusted battery;
compressing the adjusted battery to obtain a compressed battery;
the measuring the thickness of the unit to be measured includes:
determining a unit to be measured in the battery after compression treatment, and measuring the thickness of the unit to be measured;
the adjusting the positions of the pole piece and the diaphragm which are outside the unit to be measured and adjacent to the unit to be measured to obtain an adjusted battery comprises the following steps:
determining the polarity of the outermost pole piece of the unit to be detected, wherein the polarity comprises an anode polarity and a cathode polarity;
and adjusting a diaphragm which is outside the unit to be detected and is adjacent to the unit to be detected to be a pole piece with the same polarity as the pole piece at the outermost side.
2. The method for measuring the thickness of a battery diaphragm according to claim 1, wherein the determining unit to be measured consisting of the diaphragm, the positive electrode sheet and the negative electrode sheet comprises:
determining a region to be measured in the battery;
and forming the diaphragm, the positive pole piece and the negative pole piece in the to-be-detected area into the to-be-detected unit.
3. The method according to claim 1, wherein determining the thickness of the separator according to the thickness of the unit to be measured, the thickness of the positive electrode tab, the thickness of the negative electrode tab, comprises:
obtaining the number of the diaphragms in the unit to be tested;
subtracting the thickness of all the positive electrode plates and the thickness of all the negative electrodes from the thickness of the unit to be measured to obtain the thickness of all the diaphragms of the unit to be measured;
dividing the thickness of all the diaphragms by the number of the diaphragms in the unit to be detected to obtain the thickness of each diaphragm in the unit to be detected.
4. A battery separator thickness measurement method according to any one of claims 1 to 3, wherein the number of separators in each of the units to be measured is less than or equal to five.
5. The utility model provides a battery diaphragm thickness measuring device which characterized in that, the battery includes positive pole piece, diaphragm and negative pole piece, battery diaphragm thickness measuring device includes:
the determining module is used for determining a unit to be detected, which is formed by the diaphragm, the positive pole piece and the negative pole piece in the battery;
the acquisition module is used for acquiring the thickness of the positive pole piece and the thickness of the negative pole piece in the unit to be detected;
the measuring module is used for measuring the thickness of the unit to be measured;
the calculating module is used for determining the thickness of the diaphragm according to the thickness of the unit to be detected, the thickness of the positive pole piece and the thickness of the negative pole piece;
the measuring device further includes:
the adjusting module is used for adjusting the positions of the pole piece and the diaphragm which are outside the unit to be measured and are adjacent to the unit to be measured to obtain an adjusted battery;
the adjusting module is specifically used for: determining the polarity of the outermost pole piece of the unit to be detected, wherein the polarity comprises an anode polarity and a cathode polarity;
and adjusting a diaphragm which is outside the unit to be detected and is adjacent to the unit to be detected to be a pole piece with the same polarity as the pole piece at the outermost side.
6. A storage medium storing a plurality of instructions adapted to be loaded by a processor to perform the steps in the battery separator thickness measurement method of any one of claims 1 to 4.
7. An electronic device, comprising:
a memory storing executable program code, a processor coupled to the memory;
the processor invokes the executable program code stored in the memory to perform the steps in the battery separator thickness measurement method of any one of claims 1 to 4.
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| WO2013097510A1 (en) * | 2011-12-27 | 2013-07-04 | 华为技术有限公司 | Lithium ion battery, lithium ion battery cell and manufacturing method thereof |
| CN108365266A (en) * | 2018-01-24 | 2018-08-03 | 柔电（武汉）科技有限公司 | The method and production line of dry process PVDF diaphragm cell pole piece constituent elements |
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| JP4615400B2 (en) * | 2005-09-02 | 2011-01-19 | パナソニック株式会社 | Membrane measuring device for porous membrane on battery electrode plate and coating device using the same |
| JP5066849B2 (en) * | 2006-07-03 | 2012-11-07 | ソニー株式会社 | Secondary battery and manufacturing method thereof |
| CN111928805A (en) * | 2020-07-31 | 2020-11-13 | 中国科学院宁波材料技术与工程研究所 | Method for testing and analyzing expansion rate of silicon-based negative electrode material |
| CN112557929B (en) * | 2020-11-13 | 2023-07-14 | 欣旺达电动汽车电池有限公司 | Battery internal resistance testing method, electronic equipment and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2013097510A1 (en) * | 2011-12-27 | 2013-07-04 | 华为技术有限公司 | Lithium ion battery, lithium ion battery cell and manufacturing method thereof |
| CN108365266A (en) * | 2018-01-24 | 2018-08-03 | 柔电（武汉）科技有限公司 | The method and production line of dry process PVDF diaphragm cell pole piece constituent elements |
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Address after: 518000 1-2 Floor, Building A, Xinwangda Industrial Park, No. 18 Tangjianan Road, Gongming Street, Guangming New District, Shenzhen City, Guangdong Province Patentee after: Xinwangda Power Technology Co.,Ltd. Address before: 518107 Xinwangda Industrial Park, No.18, Tangjia south, Gongming street, Guangming New District, Shenzhen City, Guangdong Province Patentee before: SUNWODA ELECTRIC VEHICLE BATTERY Co.,Ltd. |