CN215179417U - Diaphragm wettability testing device - Google Patents

Abstract

The utility model relates to a diaphragm wettability testing arrangement, including test jig and scale, be equipped with left holder and right holder that is used for the centre gripping to await measuring diaphragm left and right ends on the test jig, below between left holder and the right holder is equipped with the electrolyte container that is used for holding electrolyte, be equipped with the elevating drive mechanism who is used for bearing electrolyte container's elevating platform and control elevating platform about the test jig, be equipped with the capillary that makes the upwards infiltration of electrolyte on the electrolyte container, the surface of reagent bottle is equipped with annotates the liquid mouth, during the test, both ends centre gripping is between left holder and right holder about the examination diaphragm, the lower extreme of capillary is soaked in the electrolyte, the upper end of capillary and the lower surface contact of the examination diaphragm that awaits measuring, the scale transversely locates the one side of examination diaphragm that awaits measuring. The utility model discloses can make the horizontal diffusion velocity of electrolyte more even, avoid the diffusion of electrolyte on the diaphragm to receive the influence of gravity, the measuring accuracy is higher, and the effect is better.

Description

Diaphragm wettability testing device

Technical Field

The utility model relates to a lithium cell production technical field, concretely relates to diaphragm infiltration nature testing arrangement.

Background

Along with the concept of new energy is more and more popular, people also promote greatly the concern of lithium cell, and the lithium cell mainly contains four bibliographic categories: the electrolyte is injected after the anode, the cathode and the diaphragm are molded, so that the wettability of the diaphragm on the electrolyte is difficult to test, and the time for injecting the electrolyte into a coating diaphragm with poor wettability is long; in addition, for developing the ceramic coating, a battery is prepared by coating a diaphragm on each formula to evaluate the wettability of the battery to electrolyte, so that time and resources are wasted. Therefore, some manufacturers have developed membrane wettability testing devices.

When an existing diaphragm wettability testing device is used for testing, a diaphragm is vertically suspended, the lower end of the diaphragm is immersed in electrolyte, the electrolyte is enabled to be upwards diffused on the surface of the diaphragm, the diffusion length L and the diffusion time t are recorded, the infiltration rate v can be calculated according to the formula v which is L/t, the wettability of the diaphragm on the large side of the v value is good, and otherwise, the wettability is poor. However, due to the influence of gravity, the diffusion speed is reduced when the electrolyte goes upwards, so that the test precision error is large, and the effect is not ideal.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the disappearance that prior art exists, provide a diaphragm infiltration nature testing arrangement, it can avoid receiving the influence of gravity, and the lateral diffusion velocity of electrolyte is more even, and the measuring accuracy is higher, and the effect is better.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a diaphragm wettability testing arrangement, includes test jig and scale, be equipped with on the test jig and be used for the left holder and the right holder at both ends about the await measuring diaphragm of centre gripping, below between left side holder and the right holder is equipped with the electrolyte container that is used for holding electrolyte, be equipped with the capillary that makes the electrolyte upwards permeate on the electrolyte container, during the test, both ends centre gripping between left holder and right holder about the await measuring diaphragm, during the lower extreme of capillary immerses electrolyte, the upper end of capillary and the lower surface contact of the await measuring diaphragm, the scale transversely locates the one side of the await measuring diaphragm.

As a preferred scheme, the test jig includes the base and locates left branch vaulting pole and the right branch vaulting pole on the base, be equipped with the left movable block that can adjust from top to bottom on the left branch vaulting pole, be equipped with the right movable block that can adjust from top to bottom on the right branch vaulting pole, the scale passes through left movable block and right movable block and can adjust from top to bottom and install on the test jig.

As a preferred scheme, the left clamping piece can be vertically adjusted and installed on the left supporting rod through the left movable block, and the right clamping piece can be vertically adjusted and installed on the right supporting rod through the right movable block.

Preferably, the left clamping piece and the right clamping piece are butterfly clamps.

Preferably, the base is provided with a lifting platform for supporting the electrolyte container and a lifting driving mechanism for controlling the lifting platform to move up and down.

Preferably, the electrolyte container is a reagent bottle, a plug is arranged in an opening at the upper end of the reagent bottle, and the plug is provided with a fine hole through which the capillary tube penetrates upwards.

Preferably, the outer surface of the reagent bottle is provided with a liquid injection port.

Preferably, the plug is a rubber plug.

As a preferable scheme, a power key, an ascending key, a descending key and a stopping key are arranged on the base, and the power key, the ascending key, the descending key and the stopping key are all connected with the lifting driving mechanism.

Preferably, the capillary tube has a length of 9cm to 11cm and a pore diameter of 0.04cm to 0.06 cm.

Compared with the prior art, the utility model has obvious advantages and beneficial effects, specifically, the diaphragm is transversely suspended by arranging the left clamping piece and the right clamping piece, the electrolyte in the electrolyte container is upwards transferred to the lower surface of the diaphragm by the capillary, and the electrolyte is transversely diffused on the diaphragm, thereby avoiding being influenced by gravity, the diffusion speed is more uniform, the testing precision is higher, and the effect is better; the butterfly clamp is adopted to facilitate the clamping or taking out of the diaphragm, and the operation is simple; the device simple structure sets up rationally, low in manufacturing cost, and the good reliability does benefit to the popularization.

To more clearly illustrate the structural features and technical means of the present invention and the specific objects and functions achieved thereby, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments:

drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention.

The attached drawings indicate the following:

10-a test jig; 11-a base; 12-a left support bar;

121-left clamp; 13-right support bar; 131-a right clamp;

14-a graduated scale; 15-power key; 16-an ascending bond;

17-a down bond; 18-stop key; 19-a lifting drive mechanism;

191-a lifting platform; 20-an electrolyte container; 21-an electrolyte;

22-rubber stopper; 221-pore; 23-liquid injection port;

24-a capillary tube; 25-diaphragm.

Detailed Description

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the indicated position or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.

As shown in fig. 1, a membrane wettability testing apparatus includes a testing jig 10 and a graduated scale 14, the graduated scale 14 is a steel scale, the testing jig 10 is provided with a left clamping member 121 and a right clamping member 131 for clamping the left and right ends of a membrane 25 to be tested, an electrolyte container 20 for containing electrolyte 21 is arranged below between the left clamping member 121 and the right clamping member 131, the electrolyte container 20 is provided with a capillary 24 for allowing the electrolyte 21 to permeate upwards, the length of the capillary is 9 cm-11 cm, preferably 10cm, the aperture is 0.04 cm-0.06 cm, preferably 0.05cm, during testing, the left and right ends of the membrane 25 to be tested are clamped between the left clamping member 121 and the right clamping member 131, the membrane 25 to be tested is in a transversely-straightened state and the coated surface thereof faces downwards, the lower end of the capillary 24 is immersed in the electrolyte 21, the upper end of the capillary 24 is in contact with the lower surface of the membrane 25 to be tested, the graduated scale 14 is transversely arranged on one side of the diaphragm 25 to be tested, the extending direction of the diaphragm 25 is parallel to the extending direction of the graduated scale 14, the electrolyte 21 belongs to the wetting liquid, the capillary 24 enables the electrolyte 21 to rise in the capillary 24 through the capillary phenomenon, and when the electrolyte 21 rises to the upper end of the capillary 24 to be in contact with the diaphragm 25, the electrolyte 21 can be transferred to the diaphragm 25 and spread.

The testing frame 10 comprises a base 11, and a left support rod 12 and a right support rod 13 which are arranged on the base 11, wherein the base 11, the left support rod 12 and the right support rod 13 are all made of stainless steel, a left movable block 122 which can be adjusted up and down is arranged on the left support rod 12, a right movable block 132 which can be adjusted up and down is arranged on the right support rod 12, two ends of a graduated scale 14 can be vertically adjusted and installed on the testing frame 10 through the left movable block 122 and the right movable block 132 respectively, a left clamping piece 121 can be vertically adjusted and installed on the left support rod 12 through the left movable block 122, a right clamping piece 131 can be vertically adjusted and installed on the right support rod 13 through the right movable block 132, the left movable block and the right movable block are arranged to realize vertical adjustment of the graduated scale 14 or the left clamping piece and the right clamping piece, the height of the graduated scale or a diaphragm 25 is conveniently adjusted, so that the graduated scale 14 can be read conveniently, the left clamping piece 121 and the right clamping piece 131 are butterfly clamps, the reagent bottle is characterized in that a lifting platform 191 for supporting an electrolyte container 20 and a lifting driving mechanism 19 for controlling the lifting platform 191 to move up and down are arranged on the base 11, a power key 15, a lifting key 16, a descending key 17 and a stopping key 18 are arranged on the base 11, the power key 15, the lifting key 16, the descending key 17 and the stopping key 18 are all connected with the lifting driving mechanism 19, the electrolyte container 20 is a reagent bottle, a rubber plug 22 is arranged in an opening in the upper end of the reagent bottle, the rubber plug 22 is provided with a fine hole 221 through which a capillary tube 24 penetrates upwards, and a liquid injection port 23 is formed in the outer surface of the reagent bottle.

The working principle of the invention is as follows: the contact point of the upper end of the capillary 24 and the membrane 25 to be tested is located in the center of the membrane 25 to be tested, the power key 15 is started, the lifting key 16 is started, the lifting table 191 drives the reagent bottle to lift, when the upper end of the capillary 24 is tangent to the membrane 25 to be tested, the stop key 18 is pressed to stop the lifting table 191 from moving upwards, timing is started, at the moment, the electrolyte 21 is soaked on the membrane 25 through the upper end of the capillary 24 and is diffused on the membrane 25, the electrolyte 21 in the reagent bottle is subjected to capillary phenomenon to uninterruptedly provide sufficient electrolyte 21 for the membrane 25, the timing is finished, the used time t is recorded, the descending key 17 is started, the lifting table 191 moves downwards to separate the upper ends of the membrane 25 and the capillary 24, and the stop key 18 is pressed again; the length L of the electrolyte 21 diffused on the diaphragm 25 can be read by the scale 14, and then the value of v is obtained according to the wetting rate v of the diaphragm 25 to the electrolyte 21 being L/(2 × t), the electrolyte 21 diffuses fast when the wettability is good, the electrolyte 21 diffuses slow when the wettability is poor, that is, the wettability of the diaphragm 25 to the electrolyte 21 is better when the value of v is larger, and the wettability of the diaphragm 25 to the electrolyte 21 is worse when the value of v is not so, so that the wettability of the diaphragm 25 to the electrolyte 21 is qualitatively determined.

In conclusion, the diaphragm is transversely suspended by arranging the left clamping piece and the right clamping piece, the electrolyte in the electrolyte container is upwards transferred to the lower surface of the diaphragm by using the capillary, and the electrolyte is transversely diffused on the diaphragm, so that the influence of gravity is avoided, the diffusion speed is more uniform, the test precision is higher, and the effect is better; the butterfly clamp is adopted to facilitate the clamping or taking out of the diaphragm, and the operation is simple; the power supply, the ascending, descending and stopping keys are arranged on the base, so that the test operation of personnel is facilitated, the left and right movable blocks are arranged to realize the vertical adjustment of the graduated scale or the left and right clamping pieces, the height of the graduated scale or the diaphragm is conveniently adjusted, and the reading of the graduated scale is facilitated; the device simple structure sets up rationally, low in manufacturing cost, and the good reliability does benefit to the popularization.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, so any modifications, equivalent replacements, improvements, etc. made to the above embodiments by the technology of the present invention are all within the scope of the technical solution of the present invention.

Claims (10)

1. The utility model provides a diaphragm wettability testing arrangement, its characterized in that, includes test jig and scale, be equipped with left holder and the right holder that is used for the centre gripping to await measuring diaphragm left and right ends on the test jig, below between left holder and the right holder is equipped with the electrolyte container that is used for holding electrolyte, be equipped with the capillary that makes electrolyte upwards permeate on the electrolyte container, during the test, both ends centre gripping between left holder and right holder about the examination diaphragm, the lower extreme of capillary is immersed in electrolyte, the upper end of capillary and the lower surface contact of the examination diaphragm of awaiting measuring, the scale transversely locates the one side of the examination diaphragm of awaiting measuring.

2. The membrane wettability testing device of claim 1, wherein the testing jig comprises a base, and a left support bar and a right support bar which are arranged on the base, wherein a left movable block which can be adjusted up and down is arranged on the left support bar, a right movable block which can be adjusted up and down is arranged on the right support bar, and the graduated scale is vertically adjustable and installed on the testing jig through the left movable block and the right movable block.

3. The membrane wettability testing device of claim 2, wherein the left clamping member is vertically adjustably mounted on the left support rod via a left movable block, and the right clamping member is vertically adjustably mounted on the right support rod via a right movable block.

4. The membrane wettability testing device according to claim 1 or 3, wherein each of the left clamping member and the right clamping member is a butterfly clamp.

5. The membrane wettability testing device according to claim 2, wherein the base is provided with a lifting table for supporting the electrolyte container and a lifting driving mechanism for controlling the lifting table to move up and down.

6. The membrane wettability testing device according to claim 1 or 5, wherein the electrolyte container is a reagent bottle, a stopper is arranged in an opening at the upper end of the reagent bottle, and the stopper is provided with a fine hole through which a capillary tube penetrates upwards.

7. The membrane wettability testing device according to claim 6, wherein a liquid injection port is formed in an outer surface of the reagent bottle.

8. The membrane wettability testing device according to claim 6, wherein said plug is a rubber plug.

9. The membrane wettability testing device according to claim 5, wherein a power key, an ascending key, a descending key and a stopping key are arranged on the base, and the power key, the ascending key, the descending key and the stopping key are all connected with the lifting driving mechanism.

10. The membrane wettability testing device according to claim 1, wherein the capillary has a length of 9cm to 11cm and an aperture of 0.04cm to 0.06 cm.

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