CN113566765A - 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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- CN113566765A CN113566765A CN202110837555.1A CN202110837555A CN113566765A CN 113566765 A CN113566765 A CN 113566765A CN 202110837555 A CN202110837555 A CN 202110837555A CN 113566765 A CN113566765 A CN 113566765A
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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
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- Y02E60/10—Energy storage using batteries
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Abstract
The embodiment of the application discloses a method and a device for measuring the thickness of a battery diaphragm, electronic equipment and a storage medium. The method comprises the following steps: the method comprises 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, then obtaining the thickness of the positive pole piece and the thickness of the negative pole piece in the unit to be tested, then measuring the thickness of the unit to be tested, and finally determining the thickness of the diaphragm according to the thickness of the unit to be tested, the thickness of the positive pole piece and the thickness of the negative pole piece. In the embodiment of the application, the unit to be measured is determined in the battery, the thicknesses of the positive pole piece and the negative pole piece in the unit to be measured are determined firstly, then the thickness of the unit to be measured is obtained, and the thicknesses of the positive pole piece and the negative pole piece are subtracted through 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 and device, electronic equipment and a storage medium.
Background
In the prior art, lithium ion batteries are widely used due to the characteristics of high energy density, good cycle performance, high voltage, no memory effect, environmental friendliness and the like. For example, devices such as mobile phones, computers, electric vehicles and the like can all adopt lithium ion batteries. The existing battery technology is not enough to meet the requirements of people on the performance of the battery, the capacity of the battery in the equipment is increased by increasing the energy density of the battery, and therefore the size of each component in the battery is required to be acquired.
However, the battery is compressed during the production process of the battery, which may cause the volume of some components inside the battery to change, and finally cause the measurement data of some components to be inaccurate.
Disclosure of Invention
The embodiment of the application provides a battery diaphragm thickness measuring method and device, electronic equipment and a storage medium. The method for measuring the thickness 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 battery separator, where the battery includes a positive electrode plate, a separator, and a negative electrode plate, and the method includes:
determining a unit to be tested consisting of the diaphragm, the positive pole piece and the negative pole piece in the battery;
obtaining the thickness of a positive pole piece and the thickness of a negative pole piece in the unit to be tested;
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 measured, the thickness of the positive pole piece and the thickness of the negative pole piece.
In a second aspect, an embodiment of the present application provides a battery separator thickness measurement device, the battery includes positive pole piece, diaphragm and negative pole piece, and the device includes:
the determining module is used for determining a unit to be tested consisting of a diaphragm, a positive pole piece and a negative pole piece in the battery;
the obtaining module is used for obtaining the thickness of the positive pole piece and the thickness of the negative pole piece in the unit to be tested;
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 measured, the thickness of the positive pole piece and the thickness of the negative pole piece.
In a third aspect, the present application provides a storage medium storing a plurality of instructions, where the instructions are suitable for being loaded by a processor to execute the steps in the battery separator thickness measurement method provided by the present application.
In a fourth aspect, the present application provides an electronic device, which includes a memory storing executable program code, and a processor coupled to the memory, where the processor calls the executable program code stored in the memory to perform the steps of the method for measuring the thickness of a battery separator provided in the present application.
In the embodiment of the application, the unit to be measured consisting of the diaphragm, the positive pole piece and the negative pole piece in the battery is determined, then the thickness of the positive pole piece and the thickness of the negative pole piece in the unit to be measured are obtained, then the thickness of the unit to be measured is measured, and finally the thickness of the diaphragm is determined 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. In the embodiment of the application, through determining the unit that awaits measuring in the battery, the different positions of unit that awaits measuring in the battery determine the thickness of positive pole piece and negative pole piece among the unit that awaits measuring earlier, then acquire the thickness of unit that awaits measuring, because the compressive capacity of different positions is different in the battery, carry out thickness measurement through the unit that awaits measuring to different positions, subtract the thickness of positive pole piece and negative pole piece through the unit thickness that awaits measuring at last to accurate measurement to battery diaphragm thickness has been realized.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic view of a first flow chart of a method for measuring the thickness of a battery separator according to an embodiment of the present disclosure.
Fig. 2 is a second flow chart of a battery separator thickness measurement method provided by the embodiment of the application.
Fig. 3 is a schematic view of a stacking manner of a battery provided in an embodiment of the present application.
Fig. 4 is a schematic stack diagram of a conditioned battery provided in an embodiment of the present application.
Fig. 5 is another schematic stack diagram of a conditioned battery provided in an embodiment of the present application.
Fig. 6 is a schematic structural diagram of a battery separator thickness measuring device provided in an embodiment of the present application.
Fig. 7 is a schematic structural diagram of an electronic device provided in an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the related art, a finished battery for daily use has a housing, and each component of the battery is disposed in the housing, so that in order to improve the energy density of the battery and the space utilization rate in the housing, the size of each component in the battery needs to be accurately grasped, and the finished battery with the energy density and the space utilization rate meeting the requirements can be designed and produced.
The current measurement mode 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 process of compressing the battery, such as hot pressing, the compression amount of a part of the diaphragm is different due to uneven pressure applied to different parts of the battery, and finally the thickness of the diaphragm at different parts is different, and finally the measured thickness of the diaphragm is not accurate enough.
In order to solve the technical problem, 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 view illustrating a first process of a method for measuring a thickness of a battery separator according to an embodiment of the present disclosure. The method for measuring the thickness of the battery diaphragm can accurately measure the thickness of the diaphragm in the battery. The battery separator thickness measuring 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 comprises a positive pole piece, a negative pole piece and a diaphragm, wherein in the smallest 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 a plurality of positive pole pieces, negative pole pieces and diaphragms are laminated through the lamination mode, so that the battery is formed.
In some embodiments, the unit under test may include a membrane, and the two opposite sides of the membrane are respectively provided with a positive electrode plate and a negative electrode plate, so as to form a unit under test including only one membrane.
The unit to be tested may include multiple layers of diaphragms, where there is only one pole piece between each two adjacent diaphragms, and the polarities of the pole pieces disposed on opposite sides of each diaphragm are different, for example, a pole piece with positive polarity is disposed on one side of the diaphragm, and a pole piece with negative polarity is disposed on the side opposite to the pole piece with positive polarity.
120. And obtaining the thickness of the positive pole piece and the thickness of the negative pole piece in the unit to be tested.
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, a micrometer or a micrometer can be used to measure the thicknesses of the positive electrode plate and the negative electrode plate, and a laser thickness gauge can be used to continuously measure the thicknesses of the positive electrode plate and the negative electrode plate. 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, a compression process, such as a hot pressing process, is performed on the battery composed of a plurality of positive electrode plates, a plurality of negative electrode plates, and a plurality of diaphragms, so that the compressed battery has a smaller volume.
It should be noted that, in the process of compression treatment, because some materials in the diaphragm are soft, volume change easily occurs in the process of compression treatment, and the diaphragm can be bonded with the adjacent pole piece, 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 from 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 measured, 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 plates and the thicknesses of all the negative electrode plates are removed, and the remaining thickness is the thickness of the diaphragm in the unit to be measured. The thicknesses of all the positive pole pieces and all the negative pole pieces can be subtracted from the thickness of the unit to be measured, so that the thicknesses of all the diaphragms in the unit to be measured can be obtained.
The thickness of all the membranes is then divided by the total number of membranes in the cell to be tested, resulting in a single membrane thickness.
In the embodiment of the application, the unit to be measured consisting of the diaphragm, the positive pole piece and the negative pole piece in the battery is determined, then the thickness of the positive pole piece and the thickness of the negative pole piece in the unit to be measured are obtained, then the thickness of the unit to be measured is measured, and finally the thickness of the diaphragm is determined 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. In the embodiment of the application, through determining the unit that awaits measuring in the battery, the different positions of unit that awaits measuring in the battery determine the thickness of positive pole piece and negative pole piece among the unit that awaits measuring earlier, then acquire the thickness of unit that awaits measuring, because the compressive capacity of different positions is different in the battery, carry out thickness measurement through the unit that awaits measuring to different positions, subtract the thickness of positive pole piece and negative pole piece through the unit thickness that awaits measuring at last to accurate measurement to battery diaphragm thickness has been realized.
For a more detailed understanding of the method for measuring the thickness of the battery separator provided in the embodiments of the present application, please refer to fig. 2, and fig. 2 is a second flowchart of the method for measuring the thickness of the battery separator provided in the embodiments of the present application.
210. And determining a region to be detected in the battery, and forming a unit to be detected by the diaphragm, the positive pole piece and the negative pole piece in the region to be detected.
In some embodiments, before determining the unit under test, the battery may be pre-treated by stacking the positive electrode sheet, the negative electrode sheet, and the separator, so as to form an initial shape of the battery.
For example, the positive electrode sheet, the negative electrode sheet, and the separator may be wound in one direction to form a stack layer, and the stack layer has three pairs of oppositely disposed surfaces, wherein two pairs of oppositely disposed surfaces are flat surfaces, and one pair of oppositely disposed surfaces are both arc surfaces, and two opposite arc surface regions may be cut off 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 components to be stacked are stacked, a stacked battery is formed.
Preferably, the thickness of the separator of the battery formed by stacking is measured more accurately.
In some embodiments, the number of the separators in the battery may be obtained first, and since the positive electrode plates and the negative electrode plates are respectively disposed on two opposite sides of the separators in the stacking manner of the battery, the total number of layers of the separators, the positive electrode plates, and the negative electrode plates stacked in the battery may be determined by the number of the separators 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 layers of separators, (M +1)/2 layers of positive electrodes, (M +1)/2 layers of negative electrodes, and the total number of stacked layers in the battery is 2M +1 layers. If M is an even number, the battery can comprise M layers of separators, M/2 layers of anodes and M/2+1 layers of cathodes, or M layers of separators, M/2 layers of cathodes and M/2+1 layers of anodes.
In order to ensure that the thickness of the diaphragm of the unit to be measured is accurately measured, the total number of stacked 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 stacked 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 of the separator needs to be measured, may be determined, and then the separator, the positive electrode sheet, and the negative electrode sheet stacked in the region to be measured are determined as a unit to be measured. A plurality of units to be tested may also be provided, for example, a single unit to be tested may be provided near the diaphragm outside the battery stacking area, and a corresponding unit to be tested may be provided near the middle of the battery stacking area.
In order to ensure that the diaphragm thickness of the unit to be measured is accurately measured, the number of diaphragms in each unit to be measured is less than or equal to five. And the number of units under test in the battery is less than or equal to five.
220. And adjusting the positions of the pole piece and the diaphragm outside the unit to be measured and adjacent to the unit to be measured to obtain the adjusted battery.
Referring to fig. 3, fig. 3 is a schematic diagram of a stacking method of a battery according to an embodiment of the present disclosure. Fig. 3 shows the original cell stack structure, where a1 and a2 are positive electrode plates, B1, B2, B3 and B4 are separators, and C1 and C2 are negative electrode plates.
After the unit under test is determined, the stack structure of the battery needs to be adjusted. For example, the polarity of the outermost pole piece of the unit under test, including the positive polarity and the negative polarity, may be determined, and then the separator outside the unit under test and adjacent to the unit under test is adjusted to be the pole piece with the same polarity as the outermost pole piece.
Specifically, as shown in fig. 4, fig. 4 is a schematic view of a stack of a conditioned battery provided in the embodiment of the present application.
With reference 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 can be adjusted to be adjacent to the diaphragm B2, and the position of the negative pole piece C1 can be adjusted to the original position of the positive pole piece a 1.
The pole piece of the unit downside that awaits measuring is the negative pole piece, can adjust negative pole piece C2 to be adjacent with the negative pole piece of the unit downside that awaits measuring, adjust diaphragm B3 to be adjacent with diaphragm B4, adjust the position of positive pole piece A2 to the original position that locates of negative pole piece C2.
The polarity of the outermost pole piece of the unit to be tested is the same as that of the adjacent pole piece through the adjustment of the positions of the adjacent pole piece and the diaphragm of the unit to be tested.
As shown in fig. 5, fig. 5 is another schematic stacking diagram of the modified battery provided in the embodiment of the present application.
The unit to be measured may further include 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, that is, the adjustment of the positions of the adjacent pole pieces and diaphragms of the unit to be measured makes the polarity of the outermost pole piece of the unit to be measured the same as the polarity of the adjacent pole piece.
Specifically, with reference to fig. 3 and 5, in addition to the unit to be tested, for the adjustment of the adjacent pole piece of the unit to be tested, the pole piece on the upper side of the unit to be tested 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 tested, the diaphragm B1 can be adjusted to be adjacent to the diaphragm B2, and the position of the negative pole piece C1 is adjusted to the original position of the positive pole piece a 1.
The pole piece of the unit downside that awaits measuring is the negative pole piece, can adjust negative pole piece C2 to be adjacent with the negative pole piece of the unit downside that awaits measuring, adjust diaphragm B3 to be adjacent with diaphragm B4, adjust the position of positive pole piece A2 to the original position that locates of 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 the compressed battery.
After the adjusted battery is obtained, the battery composed of the plurality of positive electrode pole pieces, the plurality of negative electrode pole pieces and the plurality of diaphragms is compressed for the pole of the adjusted battery, for example, the compression is performed in a hot pressing mode, so that the compressed battery has a smaller volume.
In some embodiments, the compression amount of the battery at different positions is different during the compression process, so that the unit to be tested can be arranged at different positions in the battery before the compression process is performed on the battery. For example, a unit to be tested is disposed in the battery at intervals, for example, corresponding units to be tested are disposed at the upper portion, the lower portion, and the middle portion of the battery, respectively.
240. And determining a unit to be measured in the battery after the compression treatment, and measuring the thickness of the unit to be measured.
Micrometer and micrometer can be used for measuring the thickness of the unit to be measured, and laser thickness gauge can be used for continuously measuring the thickness of the unit to be measured.
In some embodiments, the thickness of the unit under test measured for a plurality of measurements may be averaged, thereby reducing measurement errors during the measurements.
250. And 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.
And after the thickness of the unit to be measured is obtained, removing the thicknesses of all the positive pole pieces and all the negative pole pieces, wherein the residual thickness is the thickness of the diaphragm in the unit to be measured. The thicknesses of all the positive pole pieces and all the negative pole pieces can be subtracted from the thickness of the unit to be measured, so that the thicknesses of all the diaphragms in the unit to be measured can be obtained.
The thickness of all the membranes is then divided by the total number of membranes in the cell to be tested, resulting in a single membrane thickness.
It should be noted that, in the embodiment of the present application, the to-be-measured units are set at different positions of the battery, even after the battery is compressed, since the thickness variation of the positive electrode plate and the negative electrode plate is very small, even no variation in thickness occurs, the thickness of the to-be-measured unit at different positions can be measured, and then the thickness of the to-be-measured unit is subtracted from the thickness of the to-be-measured unit by using the thickness of the to-be-measured unit, so that the thickness of the diaphragm corresponding to the to-be-measured unit can be accurately obtained, and the thickness of the diaphragm in the battery can be accurately measured by obtaining the thickness of the diaphragm of each to-be-measured unit in this way.
In the embodiment of the application, the number of the diaphragms in the battery is determined, the unit to be measured consisting of the diaphragms, the positive pole pieces and the negative pole pieces is determined according to the number of the diaphragms in the battery, the positions of the pole pieces and the diaphragms adjacent to the unit to be measured are adjusted to obtain the adjusted battery, and then the adjusted battery is compressed to obtain the compressed battery. And determining a unit to be measured in the battery after the 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 firstly 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.
In order 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 pole pieces, 72 layers of negative pole pieces and 158 layers of separators. The battery is processed by hot pressing, wherein the temperature of the hot pressing is 90 ℃, the time is 100s, and the pressure is 5000 kg.
In the measurement mode provided in the application, the battery is divided into five different areas, the unit to be measured is respectively arranged in the five different areas, and then the position of a pole piece and the position of a diaphragm of the unit to be measured are adjusted. And carrying out hot-pressing treatment on the battery, and then carrying out thickness measurement on the diaphragm. See table 1 for details:
TABLE 1
As can be seen from Table 1, in the present application, in a plurality of experiments, in the same test area, the thickness of the diaphragm measured in the results of the plurality of experiments is basically the same, and the diaphragm thickness measurement is more accurate without large errors.
Continuing to look at table 2, table 2 is a test data of the prior art for measuring the thickness of the separator. Table 2 is as follows:
TABLE 2
As can be seen from table 2, the thickness of the separator of the battery was measured by the prior art, and the difference in the measured thickness of the separator was large for different times of experiments, for example, the thickness of the separator was 12.39 μm for the 3 rd experiment and 15.00 μm for the 9 th experiment.
For the mode of measuring the thickness of diaphragm in the battery among the prior art, this application can be more accurate measure the thickness of diaphragm in the battery.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a device for measuring the thickness of a battery separator according to an embodiment of the present disclosure. The battery separator thickness measuring device 300 includes: a determination module 310, an acquisition module 320, a measurement module 330, and a calculation module 340.
The determining module 310 is configured to determine a unit to be tested, which is composed of a diaphragm, a positive electrode plate, and a negative electrode plate in the battery.
In some embodiments, the unit under test may include a membrane, and the two opposite sides of the membrane are respectively provided with a positive electrode plate and a negative electrode plate, so as to form a unit under test including only one membrane.
The unit to be tested may include multiple layers of diaphragms, where there is only one pole piece between each two adjacent diaphragms, and the polarities of the pole pieces disposed on opposite sides of each diaphragm are different, for example, a pole piece with positive polarity is disposed on one side of the diaphragm, and a pole piece with negative polarity is disposed on the side opposite to the pole piece with positive polarity.
The determination module 310 may determine the unit under test in the battery, wherein the number of membranes in each unit under test cannot exceed five in order to ensure accurate measurement of the membrane thickness of the unit under test. And the number of units under test in the battery cannot exceed five.
After the determining module 310 determines the unit to be measured, the positions of the adjacent pole pieces and diaphragms of the unit to be measured need to be adjusted to obtain an adjusted battery. For example, the adjustment module may be disposed in the battery separator thickness measuring apparatus 300, and the polarity of the outermost pole piece of the unit to be measured, which includes the positive polarity and the negative polarity, is determined, and then the adjacent separator of the unit to be measured is adjusted to the pole piece with the same polarity as the outermost pole piece.
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 plate and the thickness of each negative electrode plate in the unit to be measured. For example, a micrometer or a micrometer can be used to measure the thicknesses of the positive electrode plate and the negative electrode plate, and a laser thickness gauge can be used to continuously measure the thicknesses of the positive electrode plate and the negative electrode plate. And finally determining the thickness of each positive pole piece and the thickness of each negative pole piece.
And the measuring module 330 is configured to measure 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 needs to be compressed. And then determining the unit to be tested in the battery after the compression treatment.
The measuring module 330 may use a micrometer or a micrometer to measure the thickness of the unit to be measured, or may use a laser thickness gauge to continuously measure the thickness of the unit to be measured.
In some embodiments, the measurement module 330 may perform an averaging process on the thickness of the unit under test measured for a plurality of times, so as to reduce the measurement error during the measurement.
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 piece, and the thickness of the negative electrode piece.
After the thickness of the unit to be measured is obtained, the calculation module 340 removes the thicknesses of all the positive electrode plates and all the negative electrode plates, and the remaining thickness is the thickness of the diaphragm in the unit to be measured. The calculation 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 plates and the thickness of all the negative electrode plates from the thickness of the unit to be measured.
The thickness of all the membranes is then divided by the total number of membranes in the cell to be tested, resulting in a single membrane thickness.
In the embodiment of the application, the unit to be measured consisting of the diaphragm, the positive pole piece and the negative pole piece in the battery is determined, then the thickness of the positive pole piece and the thickness of the negative pole piece in the unit to be measured are obtained, then the thickness of the unit to be measured is measured, and finally the thickness of the diaphragm is determined 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. In the embodiment of the application, the unit to be measured is determined in the battery, the thicknesses of the positive pole piece and the negative pole piece in the unit to be measured are determined firstly, then the thickness of the unit to be measured is obtained, and the thicknesses of the positive pole piece and the negative pole piece are subtracted through the thickness of the unit to be measured, so that the accurate measurement of the thickness of the battery diaphragm is realized.
Accordingly, an electronic device may include, as shown in fig. 7, a memory 401 having one or more computer-readable storage media, an input unit 402, a sensor 403, a processor 404 having one or more processing cores, and a power supply 405. Those skilled in the art will appreciate that the electronic device configuration shown in fig. 7 does not constitute a limitation of the electronic device and may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. Wherein:
the memory 401 may be used to store software programs and modules, and the processor 404 executes various functional applications and data processing by operating 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, an application program (such as a measurement function) required for at least one function, and the like; the storage data area may store data (such as measurement data) created according to the use of the electronic device, and the like. Further, the 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 also include a memory controller to provide the processor 404 and the input unit 402 access to the memory 401.
The input unit 402 may be used to receive input numeric or character information and 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 sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 404, and can receive and execute commands sent by the processor 404. In addition, touch sensitive surfaces may be implemented using various types of resistive, capacitive, infrared, and surface acoustic waves. The input unit 402 may include other input devices in addition to a touch-sensitive surface. 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, a mouse, a joystick, and the like.
The electronic device may further include at least one sensor 403, such as a laser sensor, which may be used to measure the positive electrode sheet, the negative electrode sheet, and the separator in the battery.
The processor 404 is a control center of the electronic device, connects various parts of the whole electronic device by using various interfaces and lines, performs various functions of the electronic device and processes data by operating 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, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 404.
The electronic device also includes a power source 405 (e.g., a battery) for powering the various components, which may preferably be logically coupled to the processor 404 via a power management system to manage charging, discharging, and power consumption via the power management system. The power supply 405 may also include any component including one or more dc or ac power sources, recharging systems, power failure detection circuitry, power converters or inverters, power status indicators, and the like.
Although not shown, the electronic device may further include a camera, a bluetooth module, and the like, which are not described in detail herein. Specifically, in this embodiment, the processor 404 in the electronic device loads the executable file corresponding to the process of one or more application programs into the memory 401 according to the following instructions, and the processor 404 runs the application program 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;
obtaining the thickness of a positive pole piece and the thickness of a negative pole piece in the unit to be tested;
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 measured, the thickness of the positive pole piece and the thickness of the negative pole piece.
It will be understood by those skilled in the art that all or part of the steps of the methods of the above embodiments may be performed by instructions or by associated hardware controlled by the instructions, which may be stored in a computer readable storage medium and loaded and executed by a processor.
To this end, the embodiments of the present application provide a storage medium, in which a plurality of instructions are stored, and the instructions can be loaded by a processor to execute the steps in any one of the battery separator measuring methods provided by the 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;
obtaining the thickness of a positive pole piece and the thickness of a negative pole piece in the unit to be tested;
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 measured, the thickness of the positive pole piece and the thickness of the negative pole piece.
The above operations can be implemented in the foregoing embodiments, and are not described in detail herein.
Wherein the storage medium may include: read Only Memory (ROM), Random Access Memory (RAM), magnetic or optical disks, and the like.
Since the instructions stored in the storage medium can execute the steps in any battery separator measuring method provided in the embodiments of the present application, the beneficial effects that can be achieved by any battery separator measuring method provided in the embodiments of the present application can be achieved, and detailed descriptions are omitted here for the sake of detail in the foregoing embodiments.
The above detailed description is provided for a battery separator measuring method, device electronic equipment and storage medium provided in the embodiments of the present application, and specific examples are applied herein to explain the principles and implementations of the present application, and the description of the above embodiments is only used to help understand the method and core ideas of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. A battery diaphragm thickness measuring method is characterized in that a battery comprises a positive pole piece, a diaphragm and a negative pole piece, and the battery diaphragm thickness measuring method comprises the following steps:
determining a unit to be tested consisting of the diaphragm, the positive pole piece and the negative pole piece in the battery;
obtaining the thickness of a positive pole piece and the thickness of a negative pole piece in the unit to be tested;
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 measured, the thickness of the positive pole piece and the thickness of the negative pole piece.
2. The method for measuring the thickness of the battery separator according to claim 1, wherein after the unit to be measured consisting of the separator, the positive electrode piece and the negative electrode piece is determined, the method further comprises the following steps:
adjusting the positions of a pole piece and a diaphragm outside the unit to be measured and adjacent to the unit to be measured to obtain an adjusted battery;
compressing the adjusted battery to obtain a compressed battery;
the measuring the thickness of the unit under test includes:
and determining a unit to be measured in the battery after the compression treatment, and measuring the thickness of the unit to be measured.
3. The method for measuring the thickness of the battery diaphragm according to claim 2, wherein the adjusting the positions of the pole piece and the diaphragm outside the unit to be measured and adjacent to the unit to be measured to obtain the adjusted battery comprises:
determining the polarity of the outermost pole piece of the unit to be tested, wherein the polarity comprises a positive pole and a negative pole;
and adjusting the diaphragm outside the unit to be tested and adjacent to the unit to be tested into the pole piece with the same polarity as the outermost pole piece.
4. The method for measuring the thickness of the battery diaphragm according to claim 1, wherein the step of determining a unit to be measured, which consists of the diaphragm, the positive pole piece and the negative pole piece, comprises the following steps:
determining a region to be tested in the battery;
and forming the diaphragm, the positive pole piece and the negative pole piece in the area to be detected into the unit to be detected.
5. The method for measuring the thickness of the battery diaphragm according to claim 1, wherein the step of 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 comprises the following steps:
acquiring the number of the inner membranes of the unit to be detected;
subtracting the thicknesses of all the positive pole pieces and all the negative poles from the thickness of the unit to be measured to obtain the thicknesses of all the diaphragms of the unit to be measured;
and dividing the thickness of all the membranes by the number of the membranes in the unit to be tested to obtain the thickness of each membrane in the unit to be tested.
6. The battery separator thickness measuring method according to any one of claims 1 to 5, wherein the number of the separators in each of the units under test is less than or equal to five.
7. The utility model provides a battery diaphragm thickness measurement device which characterized in that, the battery includes positive pole piece, diaphragm and negative pole piece, battery diaphragm thickness measurement device includes:
the determining module is used for determining a unit to be tested consisting of the diaphragm, the positive pole piece and the negative pole piece in the battery;
the obtaining module is used for obtaining the thickness of the positive pole piece and the thickness of the negative pole piece in the unit to be tested;
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 measured, the thickness of the positive pole piece and the thickness of the negative pole piece.
8. The battery separator thickness measuring device of claim 7, further comprising:
the adjusting module is used for adjusting the positions of the pole piece and the diaphragm outside the unit to be measured and adjacent to the unit to be measured to obtain an adjusted battery;
the adjustment module is specifically configured to: determining the polarity of the outermost pole piece of the unit to be tested, wherein the polarity comprises a positive polarity and a negative polarity;
and adjusting the diaphragm outside the unit to be tested and adjacent to the unit to be tested into the pole piece with the same polarity as the outermost pole piece.
9. A storage medium storing a plurality of instructions adapted to be loaded by a processor to perform the steps of the method of any one of claims 1 to 6.
10. An electronic device, comprising:
a memory storing executable program code, a processor coupled with the memory;
the processor calls the executable program code stored in the memory to execute the steps in the battery separator thickness measuring method according to any one of claims 1 to 6.
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