CN217359493U - Testing arrangement of lithium ion battery diaphragm imbibition speed - Google Patents
Testing arrangement of lithium ion battery diaphragm imbibition speed Download PDFInfo
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- CN217359493U CN217359493U CN202220407663.5U CN202220407663U CN217359493U CN 217359493 U CN217359493 U CN 217359493U CN 202220407663 U CN202220407663 U CN 202220407663U CN 217359493 U CN217359493 U CN 217359493U
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Abstract
The utility model is suitable for a lithium ion battery technical field provides a testing arrangement of lithium ion battery diaphragm imbibition speed, the testing arrangement of lithium ion battery diaphragm imbibition speed includes: the device comprises a base, wherein a transparent container is arranged on one side of the base, scale marks are arranged on the transparent container, and a container plug is arranged at one end of the transparent container and used for sealing the transparent container; the connecting pipe is arranged on one side of the transparent container, and one end of the connecting pipe is provided with a connecting pipe plug; and the fixing device is arranged on the container plug and used for fixing the object to be detected, and the gravity clamp is arranged in the transparent container and used for being matched with the fixing device to straighten and fix the object to be detected. The device for detecting the liquid absorption rate of the lithium ion diaphragm utilizes the principle of capillary adsorption, electrolyte can climb along the diaphragm, and the wall of a container is provided with scale marks, so that the climbing height in any time period can be read at any time, and a climbing rate curve can be made.
Description
Technical Field
The utility model belongs to the technical field of lithium ion battery, especially, relate to a testing arrangement of lithium ion battery diaphragm imbibition speed.
Background
In the construction of lithium batteries, the separator is one of the key internal layer components. The diaphragm has the main functions of separating the positive electrode from the negative electrode in the lithium battery, preventing the positive electrode from being in contact with the negative electrode to cause short circuit, and has the function of enabling electrolyte ions to pass through, so that the diaphragm not only needs to have electronic insulation and ensures the mechanical isolation of the positive electrode and the negative electrode, but also needs to have certain aperture and porosity, ensures low resistance and high ionic conductivity and good permeability to lithium ions, and needs to have good wettability to electrolyte and enough liquid absorption and moisture retention capacity.
In practical situations, the components of the testing device are complex, the manufacturing is inconvenient, the manufacturing of the diaphragm on the market at present is divided into a wet method and a dry method, the wet method and the dry method correspond to a double-pulling method and a single-pulling method, and the pore diameter structure and the pore diameter distribution of the diaphragms produced by different manufacturing methods are obviously different, so that the absorption rates of the diaphragms produced by different manufacturing methods to different types of electrolytes are different to a certain extent.
SUMMERY OF THE UTILITY MODEL
An object of the embodiment of the utility model is to provide a testing arrangement of lithium ion battery diaphragm imbibition speed, aim at solving in the actual conditions, testing arrangement's constitution is complicated, it is inconvenient to make, diaphragm manufacturing on the existing market divides into wet process and dry process, it has two to draw and singly draws to correspond, the pore structure and the pore diameter distribution of the diaphragm of different manufacturing approach production have obvious difference to the diaphragm that causes different manufacturing approach production also has the problem of certain difference to the absorption speed of different grade type electrolyte.
The embodiment of the utility model provides a realize like this, a testing arrangement of lithium ion battery diaphragm imbibition speed, the testing arrangement of lithium ion battery diaphragm imbibition speed includes:
the device comprises a base, wherein a transparent container is arranged on one side of the base, scale marks are arranged on the transparent container, and a container plug is arranged at one end of the transparent container and used for sealing the transparent container;
the connecting pipe is arranged on one side of the transparent container, and one end of the connecting pipe is provided with a connecting pipe plug;
and the fixing device is arranged on the container plug and used for fixing the object to be detected, and the gravity clamp is arranged in the transparent container and used for being matched with the fixing device to straighten and fix the object to be detected.
Preferably, a level gauge is arranged on the base and used for keeping the transparent container in a horizontal state.
Preferably, at least two horizontal adjusting feet are installed on the base.
Preferably, the graduation marks on the transparent container are expressed in height, with a unit of accuracy of 0.1 mm.
Preferably, the width of the gravity clamp is smaller than the inner diameter of the transparent container.
The embodiment of the utility model provides a pair of testing arrangement of lithium ion battery diaphragm imbibition speed has following beneficial effect:
1. according to the device for detecting the liquid absorption rate of the lithium ion diaphragm, by utilizing the principle of capillary adsorption, electrolyte can climb along the diaphragm, and scale lines are arranged on the wall of a container, so that the climbing height in any time period can be read at any time to prepare a climbing rate curve;
2. according to the device for detecting the liquid absorption rate of the lithium ion diaphragm, the container opening and the connecting pipe opening can be sealed by the plugs, so that the volatilization of electrolyte is prevented, and the reading is more accurate;
3. according to the device for detecting the imbibition rate of the lithium ion diaphragm, the container opening plug is provided with a fixing device and used for hanging an object to be detected, the other end of the object to be detected is straightened by using the clamp, so that the other end of the object to be detected is vertically immersed in electrolyte, and the object to be detected is prevented from being stuck to the wall of a container.
Drawings
Fig. 1 is the utility model provides a testing arrangement's of lithium ion battery diaphragm imbibition speed structure sketch map that the embodiment provided.
In the drawings: 1-a transparent container; 2-a container stopper; 3-a fixing device; 4-a level meter; 5-a base; 6-horizontal adjusting feet; 7-connecting pipe; 8-connecting a pipe plug; 9-gravity clamp; 10-scale mark; 11-the analyte.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The following detailed description is provided for the specific embodiments of the present invention.
As shown in fig. 1, in the embodiment of the present invention, the testing apparatus for the liquid suction rate of the lithium ion battery separator comprises:
the device comprises a base 5, wherein a transparent container 1 is installed on one side of the base 5, scale marks 10 are arranged on the transparent container 1, and a container plug 2 is arranged at one end of the transparent container 1 and used for sealing the transparent container 1;
the connecting pipe 7 is arranged on one side of the transparent container 1, and one end of the connecting pipe 7 is provided with a connecting pipe plug 8;
In the embodiment of the present invention, a level 4 is disposed on the base 5 for keeping the transparent container 1 in a horizontal state.
In the embodiment of the present invention, at least two leveling feet 6 are installed on the base 5.
In the embodiment of the present invention, the scale lines 10 on the transparent container 1 are expressed as height, and the unit is accurate to 0.1 mm.
In the embodiment of the present invention, the width of the gravity clamp 9 is smaller than the inner diameter of the transparent container 1.
When the device is used, the base 5 is kept horizontal by adjusting the horizontal adjusting foot 6, whether the device is horizontal or not is judged by the level meter 4, the object to be measured 11 is cut into long strips to be installed, one end of the object to be measured is fixed on the container plug 2 by the fixing device 3, the other end of the object to be measured is clamped on the gravity clamp 9 and is vertically placed in the transparent container 1 to keep the object to be measured vertical without being attached to the wall of the transparent container 1, electrolyte is injected into the transparent container 1 through the connecting pipe 7, the connecting pipe is sealed by the connecting pipe plug 8, a stopwatch is used for timing, the height of the electrolyte climbing along the diaphragm is recorded at intervals, a time-height curve graph can be made according to time and height data, and liquid absorption rates of different types of diaphragms and different types of electrolyte can be compared through the time-height curve graph. The types of the separator include a wet separator, a dry separator and a coated separator, and the thickness of the separator is from 6 μm to 40 μm, the porosity of the separator is from 30% to 60%, and the like can be detected by the method.
Example one:
a16-micron wet diaphragm and a dry three-layer co-extrusion single-drawing diaphragm are respectively selected, the porosity is about 39%, the width of a sample strip cut along the longitudinal direction is 1.5cm, a time-height curve is obtained by testing according to the testing device, and by comparison, the liquid absorption speed of the wet diaphragm in the longitudinal direction is 0.24cm/h, and the liquid absorption speed of the dry diaphragm is 0.17cm/h, so that the liquid absorption speed of the wet diaphragm is higher than that of the dry diaphragm.
Table one: time-height curves Table 1
Example two;
the same wet separator and dry separator as in example one, with a sample width of 1.5cm cut in the transverse direction, were tested according to the above test apparatus to obtain a time-height curve, and by comparison, the liquid-suction speed of the wet separator in the transverse direction was 0.63cm/h and the liquid-suction speed of the dry separator was 0.68cm/h, so that the liquid-suction speed of the wet separator in the transverse direction was almost the same as that of the dry separator.
Table two: time-height curves table 2
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. The utility model provides a testing arrangement of lithium ion battery diaphragm imbibition speed, its characterized in that, testing arrangement of lithium ion battery diaphragm imbibition speed includes:
the device comprises a base, wherein a transparent container is arranged on one side of the base, scale marks are arranged on the transparent container, and a container plug is arranged at one end of the transparent container and used for sealing the transparent container;
the connecting pipe is arranged on one side of the transparent container, and one end of the connecting pipe is provided with a connecting pipe plug;
and the fixing device is arranged on the container plug and used for fixing the object to be detected, and the gravity clamp is arranged in the transparent container and used for being matched with the fixing device to straighten and fix the object to be detected.
2. The device for testing the liquid suction rate of the lithium ion battery separator according to claim 1, wherein a level gauge is arranged on the base and used for keeping the transparent container in a horizontal state.
3. The device for testing the imbibition rate of a lithium ion battery separator as recited in claim 1, wherein at least two leveling feet are mounted on the base.
4. The device for testing the imbibition rate of a lithium ion battery separator as recited in claim 1, wherein the graduation marks on the transparent container are expressed in height with a unit of accuracy of 0.1 mm.
5. The device for testing the imbibition rate of a lithium ion battery separator as recited in claim 1, wherein the gravity clamp has a width less than an inner diameter of the transparent container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220407663.5U CN217359493U (en) | 2022-02-26 | 2022-02-26 | Testing arrangement of lithium ion battery diaphragm imbibition speed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220407663.5U CN217359493U (en) | 2022-02-26 | 2022-02-26 | Testing arrangement of lithium ion battery diaphragm imbibition speed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217359493U true CN217359493U (en) | 2022-09-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220407663.5U Active CN217359493U (en) | 2022-02-26 | 2022-02-26 | Testing arrangement of lithium ion battery diaphragm imbibition speed |
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| Country | Link |
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| CN (1) | CN217359493U (en) |
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2022
- 2022-02-26 CN CN202220407663.5U patent/CN217359493U/en active Active
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