CN211402538U

CN211402538U - Controllable pressure's of inert atmosphere conductivity test fixture

Info

Publication number: CN211402538U
Application number: CN201921504408.7U
Authority: CN
Inventors: 许晓雄; 肖孝建; 段广科; 林晓; 陶金; 周春龙; 张永龙
Original assignee: Zhejiang Funlithium New Energy Tech Co Ltd
Current assignee: Zhejiang Funlithium New Energy Tech Co Ltd
Priority date: 2019-09-10
Filing date: 2019-09-10
Publication date: 2020-09-01
Anticipated expiration: 2029-09-10

Abstract

The utility model discloses a conductivity test fixture with controllable pressure of inert atmosphere, which has the technical scheme that the conductivity test fixture with controllable pressure of inert atmosphere comprises a fixture body, wherein the fixture body comprises a fixture base and a fixture cover cap, the fixture base is provided with a sample chamber, and the sample chamber is provided with a placing opening on the top surface of the fixture base; the clamp cover is arranged on the clamp base and covers the placing opening; the clamp body is further provided with an upper fluid collector, a lower fluid collector and a first pressure spring for compressing the upper fluid collector and the lower fluid collector in the sample chamber, the conductivity test clamp can assemble a test sample under an inert atmosphere condition, then the test is carried out in a common environment, constant pressure is applied to the test sample through the spring, deformation or damage of the test sample is avoided, the conductivity test clamp is convenient to use and simple to operate, and accuracy and consistency of test results are improved.

Description

Controllable pressure's of inert atmosphere conductivity test fixture

Technical Field

The utility model relates to a battery technology field especially relates to a controllable pressure's of inert atmosphere conductivity test fixture.

Background

The lithium battery diaphragm is mainly used for electronic insulation between a positive electrode and a negative electrode and providing a migration channel for lithium ions, and is an important component for ensuring the safety of a battery system and influencing the performance of the battery. The ion conductivity of the lithium battery diaphragm mainly reflects the transmission capability of lithium ions in electrolyte to smoothly and repeatedly pass through the diaphragm, so that the detection of the ion conductivity of the lithium battery diaphragm is an important step in the detection step of the lithium battery.

Chinese utility model patent with granted publication number CN106370930A discloses a clamping device for testing the conductivity of fixed electrolyte, which comprises a stud cross bar, a stud, an upper disc, a lower disc, an upper current collector, a lower current collector, a side bracket and a load sensor. Solid electrolyte conductivity can be detected by placing a fixed electrolyte (lithium battery separator) between an upper current collector and a lower current collector.

However, when the clamping device for testing the conductivity of the fixed electrolyte is used for detecting the lithium battery diaphragm material sensitive to the environment atmosphere, the test structure is easily influenced by the conductivity detection of the lithium battery diaphragm material in the atmosphere.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a controllable pressure's of inert atmosphere conductivity test fixture, the conductivity that the controllable pressure's of inert atmosphere conductivity test fixture tested out when the test to the sensitive lithium battery diaphragm material of environment atmosphere receives the environment atmosphere influence less.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the inert atmosphere pressure-controllable conductivity test fixture comprises a fixture body, wherein the fixture body comprises a fixture base and a fixture cover, the fixture base is provided with a sample chamber, and a placing opening is formed in the sample chamber on the top surface of the fixture base; the clamp cover is arranged on the clamp base and covers the placing opening; the clamp body is further provided with an upper fluid collecting body, a lower fluid collecting body and a first pressure spring for compressing the upper fluid collecting body and the lower fluid collecting body in the sample chamber.

By adopting the technical scheme, when the conductivity test fixture is used for conducting the conductivity test on the lithium battery diaphragm material, the lithium battery diaphragm material is firstly installed into the sample chamber of the fixture body in the inert gas environment, and then the installed conductivity test fixture is transferred to the atmosphere, so that the influence of environmental factors on the conductivity test of the lithium battery diaphragm is small, and the accuracy of the measured conductivity is high when the lithium battery diaphragm material sensitive to the environmental atmosphere is tested.

The utility model is further arranged in that the top of the clamp base is provided with an installation column, the outer side wall of the installation column is provided with an external thread, and the placing opening is positioned on the top surface of the installation column; the clamp cover is provided with a placing groove, and the inner side wall of the placing groove is provided with an internal thread matched with the external thread.

Through adopting above-mentioned technical scheme, through the threaded connection cooperation between anchor clamps base and the anchor clamps shroud, this kind of cooperation mode simple structure, easy dismounting, and sealing performance is comparatively ideal.

The utility model is further arranged that a first ring groove is arranged on the top circumference of the mounting column and a first sealing ring is arranged in the first ring groove; when the clamp cover cap is installed on the clamp base, the first sealing ring is abutted to the bottom surface of the first annular groove and the top surface of the installation groove in the circumferential direction.

Through adopting above-mentioned technical scheme, the setting of first sealing washer can promote the sealing performance of the conductivity test anchor clamps of the controllable pressure of whole inert atmosphere to the conductivity degree of accuracy that measures when the test to the sensitive lithium battery diaphragm material of environment atmosphere is higher.

The utility model is further arranged in that the clamp base is also provided with a step surface opposite to the bottom surface of the clamp cover cap, the clamp base is circumferentially provided with a second annular groove on the step surface and a second sealing ring is arranged in the second annular groove; when the clamp cover cap is installed on the clamp base, the second sealing ring is abutted to the bottom surface of the second annular groove and the bottom surface of the clamp cover cap in the circumferential direction.

Through adopting above-mentioned technical scheme, the setting of second sealing washer has further promoted the sealing performance of the controllable pressure's of inert atmosphere conductivity test anchor clamps.

The utility model is further arranged in that a butting block is arranged between the first pressure spring and the upper current collector of the clamp body, and the butting block is provided with a limit groove for inserting the bottom of the first pressure spring; the top of the clamp cover cap is provided with a limiting column for mounting the first pressure spring.

Through adopting above-mentioned technical scheme, the setting of butt joint piece can make first pressure spring transmit for the pressure of last current collector more even to current collector, lithium cell diaphragm and lower current collector's laminating effect in the promotion.

The utility model discloses a further set up to, the anchor clamps body still is provided with elastic support piece between last mass flow body and standing groove top surface, elastic support piece has the first through-hole that supplies first pressure spring and butt piece to pass through, and elastic support piece's lateral wall and the inner wall looks adaptation of sample room.

Through adopting above-mentioned technical scheme, elastic support spare compresses tightly the top surface border of current collection body, and cooperates first pressure spring and butt piece to compress tightly the middle part of current collection body, can further promote current collection body, lithium cell diaphragm and the lower laminating effect between the current collection body, helps promoting the measurement accuracy of the conductivity of inert atmosphere controllable pressure's conductivity test fixture to lithium cell diaphragm.

The utility model is further provided with that the elastic supporting piece sequentially comprises an upper guide ring, a second pressure spring and a lower guide ring from top to bottom, and the upper guide ring and the lower guide ring are both provided with clamping grooves for clamping the end part of the second pressure spring; the outer side surfaces of the upper guide ring and the lower guide ring are matched with the inner wall of the sample chamber.

Through adopting above-mentioned technical scheme, disclosed elastic support piece's concrete structure, and above-mentioned elastic support piece's simple structure, it is comparatively ideal to last fluid collection's the effect that compresses tightly.

The utility model is further arranged in that the clamp base is provided with a first channel for the lead of the lower fluid collector to penetrate out, and the clamp base is provided with a lower banana plug for the lead of the lower fluid collector to be connected at the opening of the outer end of the first channel; the second passageway that the wire that supplies to go up the mass flow body worn out is seted up to the anchor clamps shroud, the last banana plug of being connected with the wire of last mass flow body is installed at the outer end opening part of second passageway to the anchor clamps shroud.

Through adopting above-mentioned technical scheme, the setting of going up banana plug and banana plug down can make things convenient for the conductivity test fixture of the controllable pressure of inert atmosphere to carry out the test of conductivity, only need install the lithium cell diaphragm in conductivity test fixture under the inert gas environment, say conductivity test fixture again and take out under the inert gas environment, directly can be connected to the electrochemistry workstation.

To sum up, the utility model discloses following beneficial effect has:

1. a pressure-controllable conductivity test fixture of inert atmosphere is characterized in that a sample chamber is arranged on a fixture base, and a fixture cover covers the sample chamber, so that a lithium battery diaphragm material sensitive to the environment atmosphere can be installed in the sample chamber in an inert gas environment, and then the conductivity test fixture is taken out to be connected with an electrochemical workstation for detection, so that the accuracy of the conductivity measured during the test of the lithium battery diaphragm material sensitive to the environment atmosphere is high;

2. the first sealing ring and the second sealing ring are arranged, so that the sealing performance of the inert atmosphere controllable pressure conductivity test fixture is improved, and the consistency and the accuracy of conductivity detection of the lithium battery diaphragm material sensitive to the environment atmosphere are further improved;

3. through setting up elastic support piece, and elastic support piece includes guide ring, second pressure spring and guide ring down for it is more even with lower album fluid to the extrusion of lithium cell diaphragm to go up the current collector, can reduce the probability that deformation takes place for lithium cell diaphragm, thereby promotes the uniformity and the accuracy of lithium cell diaphragm conductivity test.

Drawings

FIG. 1 is a schematic cross-sectional view of an inert atmosphere controlled pressure conductivity test fixture;

FIG. 2 is a schematic illustration of a cross-sectional fit of the clamp cover, first compression spring and abutment block;

fig. 3 is a schematic cross-sectional view of the elastic supporting member.

In the figure: 1. a clamp base; 11. a base; 12. mounting a column; 13. a step surface; 14. a first ring groove; 141. a first seal ring; 15. a second ring groove; 151. a second seal ring; 16. a sample chamber; 161. a placement port; 17. a first channel; 18. inserting a banana plug; 2. a clamp cover; 21. a placement groove; 22. a raised portion; 23. a limiting column; 24. a butting block; 241. a limiting groove; 25. a second channel; 26. a banana plug is arranged; 3. an upper current collector; 4. a lower current collector; 5. a first pressure spring; 6. an elastic support member; 61. an upper guide ring; 62. a second pressure spring; 63. a lower guide ring; 64. a clamping groove; 65. a first via.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, an inert atmosphere pressure-controlled conductivity test jig includes a jig body, and an upper current collector 3, a lower current collector 4, a first pressure spring 5, and an elastic support 6 disposed in the jig body.

The anchor clamps body is including sealed dismouting complex anchor clamps base 1 and anchor clamps shroud 2.

The fixture base 1 sequentially comprises a base 11 and a mounting column 12 from bottom to top. Wherein, base 11 and erection column 12 are whole all cylindrical, and the external diameter of base 11 is greater than the external diameter of erection column 12 for the top surface of base 11 is formed with the ladder face 13 in the outside of erection column 12. The outer side wall of the mounting post 12 is provided with an external thread.

The fixture base 1 also has a sample chamber 16 and the sample chamber 16 is formed with a placement opening 161 in the top surface of the mounting post 12. Sample chamber 16 is a cylindrical cavity.

The lower fluid collector 4 is mounted on the bottom surface of the sample chamber 16, the clamp base 1 is provided with a first channel 17 through which a lead of the lower fluid collector 4 passes, and the clamp base 1 is provided with a lower banana plug 18 at the outer end opening of the first channel 17 for connecting the lead of the lower fluid collector 4.

The top surface of the mounting post 12 is circumferentially provided with a first ring groove 14 along the edge of the placing opening 161, and a first sealing ring 141 is mounted in the first ring groove 14.

The base 11 has a second annular groove 15 formed in a circumferential direction on the stepped surface 13 at the top thereof, and a second seal ring 151 is mounted in the second annular groove 15.

The upper current collector 3 is disposed above the lower current collector 4. In the test, a lithium battery separator was installed between the upper current collector 3 and the lower current collector 4.

Referring to fig. 1 and 2, the clamp cover 2 has a placing groove 21 engaged with the mounting post 12, and an inner wall of the placing groove 21 has an internal thread engaged with the external thread. The jig cover 2 is provided with a raised portion 22 in the placement groove 21, and a stopper post 23 on which the first pressure spring 5 is mounted is provided on the top surface of the raised portion 22.

The anchor clamps body still is equipped with butt piece 24 between first pressure spring 5 and the top surface of last current collector 3, and butt piece 24 top surface is seted up and is supplied first pressure spring 5 bottom male spacing groove 241, and butt piece 24 has the through-hole that the wire that supplies current collector 3 to pass through.

Referring to fig. 1 and 3, the elastic support 6 includes an upper guide ring 61, a second pressure spring 62, and a lower guide ring 63 in this order from top to bottom. The upper guide ring 61 and the lower guide ring 63 are respectively provided with a clamping groove 64 for clamping the end part of the second pressure spring 62, and the outer side surfaces of the upper guide ring 61 and the lower guide ring 63 are matched with the inner wall of the sample chamber 16. Wherein a first through hole 65 through which the abutment block 24 and the first pressure spring 5 pass is formed in the middle of the elastic support 6.

Referring to fig. 1 and 2, the clamp cover 2 is provided with a second passage 25 through which a lead of the upper current collector 3 passes, and an upper banana plug 26 connected with the lead of the upper current collector 3 is mounted at an opening of an outer end of the second passage 25 of the clamp cover 2.

When the clamp cover is mounted on the clamp base, the first sealing ring 141 circumferentially abuts against the bottom surface of the first ring groove 14 and the top surface of the mounting groove, and the second sealing ring 151 circumferentially abuts against the bottom surface of the second ring groove 15 and the bottom surface of the clamp cover 2.

The steps of detecting the conductivity of the lithium battery diaphragm material sensitive to the environment atmosphere by the conductivity test clamp with the controllable pressure of the inert atmosphere are as follows:

1. installing an environment-sensitive lithium battery diaphragm material on the top surface of the lower current collector 4 in an inert gas environment;

2. the clamp cover 2 is arranged on the clamp base 1, so that a sample chamber 16 of the mould body is isolated from an external environment, and under the action of the first pressure spring 5 and the support body 6, the upper current collector 3 and the lower current collector 4 tightly press the lithium battery diaphragm material sensitive to the environment atmosphere;

3. and taking the conductivity test fixture out of the inert gas environment, connecting the conductivity test fixture with an electrochemical workstation, and detecting the conductivity of the lithium battery diaphragm through the electrochemical workstation.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. The inert atmosphere pressure-controllable conductivity test fixture is characterized by comprising a fixture body, wherein the fixture body comprises a fixture base (1) and a fixture cover cap (2), the fixture base (1) is provided with a sample chamber (16), and the sample chamber (16) is provided with a placing opening (161) on the top surface of the fixture base (1); the clamp cover (2) is arranged on the clamp base (1) and covers the placing opening (161); the clamp body is further provided with an upper fluid collector (3), a lower fluid collector (4) and a first pressure spring (5) for compressing the upper fluid collector (3) and the lower fluid collector (4) in the sample chamber (16).

2. The inert atmosphere controlled pressure conductivity test fixture according to claim 1, wherein the fixture base (1) has a mounting column (12) on the top, and the outer side wall of the mounting column (12) is provided with an external thread, and the placing opening (161) is located on the top surface of the mounting column (12); the clamp cover (2) is provided with a placing groove (21), and the inner side wall of the placing groove (21) is provided with an internal thread matched with the external thread.

3. The inert atmosphere controlled pressure conductivity test fixture according to claim 2, wherein a first ring groove (14) is formed in the top of the mounting column (12) in the circumferential direction, and a first sealing ring (141) is mounted in the first ring groove (14); when the clamp cover cap (2) is installed on the clamp base (1), the first sealing ring (141) is abutted to the bottom surface of the first annular groove (14) and the top surface of the installation groove in the circumferential direction.

4. The clamp for testing the inert atmosphere controllable pressure conductivity of claim 3, wherein the clamp base (1) is further provided with a stepped surface (13) opposite to the bottom surface of the clamp cover cap (2), the clamp base (1) is circumferentially provided with a second annular groove (15) on the stepped surface (13), and a second sealing ring (151) is arranged in the second annular groove (15); when the clamp cover cap (2) is installed on the clamp base (1), the second sealing ring (151) is circumferentially abutted against the bottom surface of the second annular groove (15) and the bottom surface of the clamp cover cap (2).

5. The inert atmosphere controlled pressure conductivity test fixture according to claim 2, wherein the fixture body is further provided with an abutting block (24) between the first pressure spring (5) and the upper current collector (3), and the abutting block (24) is provided with a limiting groove (241) for inserting the bottom of the first pressure spring (5); the top of the clamp cover cap (2) is provided with a limiting column (23) for installing the first pressure spring (5).

6. The inert atmosphere controlled pressure conductivity test fixture according to claim 2, wherein the fixture body is further provided with an elastic support (6) between the upper current collector (3) and the top surface of the placing groove (21), the elastic support (6) is provided with a first through hole (65) for the first pressure spring (5) and the abutting block (24) to pass through, and the outer side wall of the elastic support (6) is matched with the inner wall of the sample chamber (16).

7. The inert atmosphere controlled pressure conductivity test fixture according to claim 6, wherein the elastic support member (6) comprises an upper guide ring (61), a second pressure spring (62) and a lower guide ring (63) from top to bottom, and the upper guide ring (61) and the lower guide ring (63) are respectively provided with a clamping groove (64) for clamping the end of the second pressure spring (62); the outer side surfaces of the upper guide ring (61) and the lower guide ring (63) are matched with the inner wall of the sample chamber (16).

8. The inert atmosphere controllable pressure conductivity test fixture according to claim 1, characterized in that the fixture base (1) is provided with a first channel (17) for the lead of the lower current collector (4) to pass through, and a lower banana plug (18) for the lead of the lower current collector (4) to connect is installed on the fixture base (1) at the opening of the outer end of the first channel (17); second passageway (25) that the wire that supplies current collector (3) to wear out are seted up in anchor clamps shroud (2), last banana plug (26) of being connected with the wire of last current collector (3) are installed at the outer end opening part of second passageway (25) in anchor clamps shroud (2).