CN112595426A - Lithium battery pole roll temperature measurement patch and lithium battery pole roll temperature measurement method - Google Patents
Lithium battery pole roll temperature measurement patch and lithium battery pole roll temperature measurement method Download PDFInfo
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- CN112595426A CN112595426A CN201910876404.XA CN201910876404A CN112595426A CN 112595426 A CN112595426 A CN 112595426A CN 201910876404 A CN201910876404 A CN 201910876404A CN 112595426 A CN112595426 A CN 112595426A
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- temperature
- pole roll
- patch
- lithium battery
- battery pole
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/026—Means for indicating or recording specially adapted for thermometers arrangements for monitoring a plurality of temperatures, e.g. by multiplexing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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- General Physics & Mathematics (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention discloses a lithium battery pole roll temperature measurement patch and a lithium battery pole roll temperature measurement method, which belong to the field of lithium battery process optimization methods and comprise an upper layer patch and a lower layer patch, wherein a guide pipe is fixed between the upper layer patch and the lower layer patch, a temperature measurer for measuring temperature is installed in the guide pipe, the guide pipe is attached to a blank area of a lithium battery pole roll through the upper layer patch and the lower layer patch, the temperature of the pole roll can be measured more accurately, and the temperature of the pole roll at different positions can be measured by attaching the lithium battery pole roll temperature measurement patches to different positions of the pole roll, so that the temperature distribution of the pole roll can be obtained, and the problems that the temperature of the pole roll during baking is indirectly obtained by measuring the temperature of the inner wall of an oven in the prior art, the temperature is measured inaccurately, and the temperature distribution condition of the pole roll cannot be obtained.
Description
Technical Field
The invention relates to a lithium battery process optimization method, in particular to a lithium battery pole roll temperature measurement patch and a lithium battery pole roll temperature measurement method.
Background
In the production process of the lithium battery pole piece, coating needs to be carried out on foil, and after the coating is finished, the pole piece needs to be wound into a pole roll and baked in an oven so as to remove moisture in a pole piece coating area. When the moisture in the coating area of the pole piece is removed, the temperature in the oven needs to be controlled, and the pole piece is prevented from being damaged due to incomplete moisture removal or overhigh temperature caused by overlow temperature. Therefore, it is necessary to measure the actual temperature of the pole roll during baking, compared to the optimal baking temperature, in order to optimize the oven structure. In the prior art, the temperature of the polar coil during baking is generally obtained indirectly by measuring the temperature of the inner wall of the oven, however, because the heating wire of the oven is close to the wall of the oven and is far away from the polar coil, the obtained temperature is often higher than the actual temperature of the polar coil during baking; in addition, because the distance from the pole piece at different positions on the pole roll to the heating wire is also different, the temperature distribution condition of the pole roll cannot be obtained.
For example, the "vacuum baking apparatus and baking method for battery pole roll" disclosed in the chinese patent document, whose publication number is CN201910487369.2, includes a temperature control mechanism, which has disadvantages in that its temperature controller is located on the wall heating member and the axis heating member, the obtained temperature is higher than the actual temperature of the pole roll at the time of baking, and temperature distribution at different positions on the pole roll cannot be obtained.
Disclosure of Invention
The invention provides a lithium battery pole roll temperature measurement patch and a lithium battery pole roll temperature measurement method, aiming at overcoming the defects that in the prior art, when the temperature of a pole roll is measured during baking, the obtained temperature is inaccurate, and the temperature distribution of different positions on the pole roll cannot be obtained.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention discloses a lithium battery pole roll temperature measurement patch which comprises an upper layer patch and a lower layer patch, wherein a guide pipe is fixed between the upper layer patch and the lower layer patch, and a temperature measurer for measuring temperature is arranged in the guide pipe; the lithium battery pole is rolled up and is divided into the middle coating district that scribbles thick liquids and both sides and leave white the district that leaves that is used for pasting utmost point ear, through upper patch and lower floor's patch paste the stand still of lithium battery pole book in the district that leaves white, can measure the temperature of pole book more accurately to, through rolling up the temperature measurement patch with lithium battery pole and pasting in the different positions of pole book, can measure the temperature of pole book in different positions, thereby obtain its temperature distribution.
Preferably, the guide tube is used for placing the temperature measuring device, and the tube diameter of the guide tube gradually decreases from one end to the other end of the guide tube.
Preferably, the upper patch and the lower patch are made of teflon; because the temperature is higher when baking in the oven, and the coating slurry in the pole roll has certain corrosivity, the teflon has excellent high temperature resistance and corrosion resistance, and the service life of the paster can be prolonged.
Preferably, be equipped with the filter screen that is used for filtering impurity near the one end of lithium cell utmost point book coating district between upper patch and the lower floor's paster, when temperature sensor put into the paster from the external world, probably take impurity to utmost point book in to pollute the coating district of utmost point book, thereby exert an influence to the performance of battery, the filter screen can filter impurity, guarantees the cleanness in coating district.
The invention discloses a temperature measuring method of a lithium battery pole roll, which comprises the following steps:
firstly, rolling a pole roll, respectively drawing two mutually perpendicular diameters on two side surfaces of the rolled pole roll, and marking a plurality of equidistant temperature measuring points on the diameters;
unwinding the pole roll, and pasting a lithium battery pole roll temperature measurement patch on a marked temperature measurement point;
inserting a temperature measurer into a guide pipe of the lithium battery pole roll temperature measurement patch;
fourthly, rolling the polar coil again, and putting the polar coil into an oven for baking;
recording the temperature of the temperature measurer on each temperature measuring point.
The temperature measuring points are distributed on different positions of the pole roll, so that the temperature measuring device can obtain the temperature distribution of the pole roll at different positions, and the temperature measuring patch of the pole roll of the lithium battery is attached to the pole roll, so that the measuring result is more accurate.
Preferably, in the first step, different marks are marked on different temperature measuring points for distinguishing, and the marks can reflect the side where the temperature measuring points are located after rolling and the direction and the distance of the circle center of the side of the polar roll; the radial, axial and circumferential temperature distribution on the pole roll can be clearly reflected by the marks.
Preferably, in the second step, the temperature measuring patch of the lithium battery pole roll is attached to the blank area of the pole roll, the minimum distance between the patch and the coating area of the pole roll is 3-10mm, and the situation that the patch is too far away from the coating area to cause inaccurate measuring results or the patch is too close to the coating area to cause damage to the coating area is avoided.
Therefore, the invention has the following beneficial effects: (1) the temperature measuring patch of the lithium battery pole roll is attached to the pole roll, so that the temperature measurement is more accurate, and the temperature distribution of different positions on the pole roll can be obtained; (2) the coating area is not polluted during temperature measurement; (3) the service life of the patch is long.
Drawings
FIG. 1 is a schematic structural diagram of a lithium battery pole roll temperature measurement patch of the present invention.
FIG. 2 is a schematic structural diagram of a lithium battery pole roll temperature measurement patch attached to a pole roll.
FIG. 3 is a top view of a lithium battery pole roll temperature measurement patch of the present invention attached to a pole roll.
In the figure: 1. the temperature measuring device comprises an upper layer patch 2, a lower layer patch 3, a guide pipe 4, a temperature measuring device 5, a filter screen 6, a pole roll 61, a coating area 62, a blank area 7 and a lithium battery pole roll temperature measuring patch.
Detailed Description
The invention is further described with reference to the following detailed description and accompanying drawings.
In the embodiment shown in fig. 1-3, the lithium battery pole roll temperature measurement patch comprises an upper layer patch and a lower layer patch, wherein a guide pipe is fixed between the upper layer patch and the lower layer patch, and a temperature measurer for measuring temperature is installed in the guide pipe; when the patch is manufactured, the lower patch is horizontally placed, the upper side face of the lower patch is coated with an adhesive, the guide pipe is placed in the middle of the lower patch, then the upper patch covers the upper sides of the lower patch and the guide pipe, and the temperature sensor is a thermocouple temperature sensor; the pipe diameter of the guide pipe is gradually reduced from one end, used for placing the temperature measurer, to the other end, and the front section of the thermocouple temperature sensor is conical and can be clamped and fixed on a port with a smaller pipe diameter of the guide pipe; the upper layer patch and the lower layer patch are made of teflon which is soft in texture, easy to bend, resistant to high temperature and resistant to corrosion; between upper strata paster and the lower floor's paster, be equipped with the filter screen that is used for filtering impurity near the one end that lithium cell utmost point rolled up the coating district, separate through the filter screen between the coating of thermocouple and utmost point book, the material of filter screen is active carbon.
In the embodiment shown in fig. 1-3, a method for measuring the temperature of a lithium battery pole roll comprises the following steps:
firstly, rolling a pole roll, respectively drawing two mutually perpendicular diameters on two side surfaces of the rolled pole roll, and marking a plurality of equidistant temperature measuring points on the diameters;
unwinding the pole roll, and pasting a lithium battery pole roll temperature measurement patch on a marked temperature measurement point;
inserting a temperature measurer into a guide pipe of the lithium battery pole roll temperature measurement patch;
fourthly, rolling the polar coil again, and putting the polar coil into an oven for baking;
recording the temperature of the temperature measurer on each temperature measuring point.
Two diameters of the side surface of the polar roll are respectively marked with 8 temperature measuring points which divide the diameter into equal parts, and the side surfaces of the two polar rolls are provided with 32 temperature measuring points in total; one side of the lithium battery pole roll temperature measurement patch, which is close to the coating area, is 3-10mm away from the coating area, and the patch covers the temperature measurement point.
Marking different marks on different temperature measuring points for distinguishing, wherein the marks can reflect the side where the temperature measuring points are located after rolling and the direction and the distance of the side circle center of the polar roll relative to the side circle center of the polar roll; the labels of two side surfaces of the polar roll are distinguished by A, B, the labels of temperature measuring points of the same side surface in four directions relative to the circle center are distinguished by numerals 1, 2, 3 and 4, the labels of the temperature measuring points of the same side surface in the same direction but different distances to the circle center are distinguished by other numerals 1, 2, 3 and 4, for example, the label of the temperature measuring point closest to the upper part of the circle center on one side surface of the polar roll is A11, the label of the temperature measuring point farthest to the left side of the circle center on the other side surface is B24, the distribution of the temperature in the axial direction of the polar roll can be obtained by comparing the temperature measuring points of different side surfaces, such as A11 and B11, the distribution of the temperature in the radial direction of the polar roll can be obtained by comparing the temperature measuring points in different directions relative to the circle center, such as A11, A21, A31 and A41, the distribution of the temperature in the circumferential direction of the polar roll can be obtained by comparing the labels of the temperature measuring points different distances to the circle centers, the distribution of the heating wires in the baking oven can be adjusted, so that the temperature of each position of the pole roll can be within the standard temperature range required by baking.
The lithium battery pole roll temperature measurement patches are attached to the blank area of the pole roll, the minimum distance between each patch and the coating area of the pole roll is 3-10mm, and in the embodiment, the distance from one side, close to the coating area of the pole roll, of each patch to the coating area is 5 mm.
Claims (7)
1. The utility model provides a temperature measurement paster is rolled up to lithium cell utmost point, characterized by includes upper patch (1) and lower floor's patch (2), be fixed with stand pipe (3) between upper patch and the lower floor's patch, install in the stand pipe and be used for measuring temperature's temperature measurement ware (4).
2. The lithium battery pole roll temperature measurement patch as claimed in claim 1, wherein the guide tube is adapted to be inserted into the temperature measurement device such that the diameter of the tube decreases gradually from one end to the other end of the temperature measurement device.
3. The lithium battery pole roll temperature measurement patch as claimed in claim 1, wherein the upper and lower patches are made of Teflon.
4. The lithium battery pole roll temperature measurement patch as claimed in any one of claims 1 to 3, wherein a filter screen (5) for filtering impurities is arranged between the upper patch and the lower patch at one end close to the coating area of the lithium battery pole roll.
5. A temperature measuring method of a lithium battery pole roll is characterized by comprising the following steps:
firstly, winding a pole roll (6), respectively drawing two mutually perpendicular diameters on two side surfaces of the wound pole roll, and marking a plurality of equidistant temperature measuring points on the diameters;
unwinding the pole roll, and attaching a lithium battery pole roll temperature measurement patch (7) to the marked temperature measurement point;
inserting a temperature measurer into a guide pipe of the lithium battery pole roll temperature measurement patch;
fourthly, rolling the polar coil again, and putting the polar coil into an oven for baking;
recording the temperature of the temperature measurer on each temperature measuring point.
6. The method for measuring the temperature of the lithium battery pole roll according to claim 5, wherein in the step (i), different marks are marked on different temperature measuring points for distinguishing, and the marks can reflect the side where the temperature measuring points are located after rolling and the direction and the distance of the center of the circle relative to the side of the pole roll.
7. The method for measuring the temperature of the lithium battery pole roll is characterized in that in the second step, the temperature measuring patch of the lithium battery pole roll is attached to the blank area (62) of the pole roll, and the minimum distance between the patch and the coating area (61) of the pole roll is 3-10 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910876404.XA CN112595426A (en) | 2019-09-17 | 2019-09-17 | Lithium battery pole roll temperature measurement patch and lithium battery pole roll temperature measurement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910876404.XA CN112595426A (en) | 2019-09-17 | 2019-09-17 | Lithium battery pole roll temperature measurement patch and lithium battery pole roll temperature measurement method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112595426A true CN112595426A (en) | 2021-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910876404.XA Pending CN112595426A (en) | 2019-09-17 | 2019-09-17 | Lithium battery pole roll temperature measurement patch and lithium battery pole roll temperature measurement method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112595426A (en) |
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2019
- 2019-09-17 CN CN201910876404.XA patent/CN112595426A/en active Pending
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| TA01 | Transfer of patent application right |
Effective date of registration: 20211111 Address after: 311215 No. 855, Jianshe Second Road, economic and Technological Development Zone, Xiaoshan District, Hangzhou City, Zhejiang Province Applicant after: Wanxiang A123 Co.,Ltd. Address before: 311215 No. 855, Jianshe Second Road, Xiaoshan Economic and Technological Development Zone, Xiaoshan District, Hangzhou City, Zhejiang Province Applicant before: Wanxiang A123 Co.,Ltd. Applicant before: WANXIANG GROUP Co.,Ltd. |
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