CN203909142U - Testing device of electrical conductivity of electrolyte - Google Patents
Testing device of electrical conductivity of electrolyte Download PDFInfo
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- CN203909142U CN203909142U CN201420249005.3U CN201420249005U CN203909142U CN 203909142 U CN203909142 U CN 203909142U CN 201420249005 U CN201420249005 U CN 201420249005U CN 203909142 U CN203909142 U CN 203909142U
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- proving installation
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- barrier film
- test
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Abstract
The utility model provides a testing device of electrical conductivity of electrolyte. The testing device comprises a cavity body, two oppositely-arranged insulation fixed plates, two lithium sheets, and testing joints; the cavity body is used for storing the electrolyte; the insulation fixed plates are arranged in the cavity body; the lithium sheets are arranged between and are clamped by the fixed plates; and the testing joints are respectively arranged on the lithium sheets. According to the utility model, resistance between the lithium sheets in the testing device is small, detection is precise, a noble electrode is free from contact with the electrolyte, so interference to the testing by the noble electrode is avoided, and the testing device is suitable for the test of the electrical conductivity of the electrolyte of a lithium ion battery.
Description
Technical field
The utility model discloses a kind of proving installation of electrolytic conductivity, belong to conductivity testing apparatus field.
Background technology
Current most of electronic equipments all need to use lithium ion battery, the nonaqueous electrolyte of filling in battery container is the important component part of lithium ion battery, the conductivity of nonaqueous electrolyte has directly reflected the ability of electric current conduction in electrolyte, therefore in the process of research and development and manufacture lithium ion battery, often needs electrolytical conductivity to test.Because commercially available conductivity meter cannot be simulated the true environment of lithium ion battery, thereby its measurement result is not often inconsistent with actual service condition, and this just makes the test data reference value of conductivity meter low.
For the ability of electrolytical electric current conduction in true reflection lithium ion battery, Chinese patent literature CN202494660U discloses a kind of lithium ion mobility energy proving installation of electrolytic solution, the gland bonnet that comprises container and mate with container, gland bonnet is provided with electrode, one end of electrode is connected with the stationary pipes being placed in described container, and the other end exposes the test splice for connecting test instrument through the center hub on gland bonnet.The stationary pipes that this device adopts and the package assembly of electrode, one side can make the right opposite of lithium sheet amass and distance is fixed, thereby improve test repeatability and operability, can make on the other hand to test lithium sheet contacts well in the extruding of stationary pipes and electrode, prevent the change of lithium sheet position and distance in test process, improve the accuracy rate of test.
Although above-mentioned technology can be fixed the position of lithium sheet in device, to improve the repeatability of test; But, between between two lithium sheets, being separated with stationary pipes, the resistance of large scale stationary pipes is larger, can hinder the conduction of electric current in electrolyte, easily causes the inaccurate of electrolytic conductivity test.
And the electrode of clamping lithium sheet is metal material, it also can touch electrolyte and charge-conduction occurs with it in conductivity test process, and this has just caused the inaccurate of electrolytic conductivity test.
Utility model content
Technical problem to be solved in the utility model is that in prior art, the resistance between two lithium sheets is larger, has hindered electric current conduction, easily causes the inaccurate of electrolytic conductivity test; And then the electrolytic conductivity proving installation that a kind of lithium bar to bar resistance is less, do not hinder electric current conduction proposed.
The utility model simultaneously another technical matters to be solved be in prior art, clamp lithium sheet metal electrode easily with electrolyte generation charge transfer, cause inaccurate that electrolytic conductivity tests; And then propose a kind of extra metal electrode not with the electrolytic conductivity proving installation of electrolyte generation charge transfer.
For solving the problems of the technologies described above, the utility model provides a kind of proving installation of electrolytic conductivity, comprise,
Hold electrolytical cavity;
In described cavity, two insulation fixing plates that are oppositely arranged;
Two lithium sheets, between two fixed heads, are clamped by described two fixed heads;
Barrier film, clamped being arranged between described two lithium sheets;
Test splice, is separately positioned on described two lithium sheets.
The thickness of described barrier film is 5-30 μ m.
Lower space between described two lithium sheets clamps described barrier film is set.
Also comprise isolated insulation layer, clamped being arranged between described two lithium sheets do not filled in septate space.
Described cavity is made up of the corrosion resistant Soft Roll material seal of inwall.
Also comprise for inject electrolytical drainage tube in described cavity, stretch in described cavity and also seal and be arranged between described cavity inner wall and fixed head.
The sidepiece of described fixed head is provided with groove, and described lithium sheet embeds in described groove; The top of described fixed head is provided with the through hole connecting with described groove, and described test splice is connected with lithium sheet through described through hole.
Described test splice is inert electrode, and described inert electrode is connected with lithium sheet through described through hole.
Also comprise sealed tube, sealing is nested with the outside of the described inert electrode above described fixed head.
Also comprise binding parts, be arranged at the outside of two fixed heads, for tighten two fixed heads.
" barrier film " described in the application is for being exclusively used in the barrier film of lithium ion battery.
The utility model has following beneficial effect compared with prior art scheme:
(1) proving installation of electrolytic conductivity described in the utility model, comprises and holds electrolytical cavity; In described cavity, two insulation fixing plates that are oppositely arranged; Two lithium sheets, between two fixed heads, are clamped by described two fixed heads; Barrier film, clamped being arranged between described two lithium sheets; Test splice, is separately positioned on described two lithium sheets.After test splice is connected with testing tool, get final product the conductivity of test chamber cylinder electrolyte, this measured value is close to actual conductivity.Two lithium sheets separate by very thin barrier film, and the resistance of barrier film is very little, even if therefore electrolytical conductivity is very poor, also can go out electrolytical actual conductivity by this device to test.And except two lithium sheets, other inert metal does not contact with electrolyte, can not impact test, improve the accuracy of test.
(2) proving installation of electrolytic conductivity described in the utility model, the lower space between described two lithium sheets clamps described barrier film is set.When test, make the lithium sheet part that clamps barrier film be immersed in electrolyte, thereby the test area of having fixed lithium sheet improve the reappearance of test.Described test splice is inert electrode, and described inert electrode is connected with lithium sheet through described through hole, and inert electrode does not contact with electrolyte, has avoided the interference of inert electrode to conductivity test, has improved accuracy.Also comprise sealed tube, sealing is nested with the outside of the described inert electrode above described fixed head, and sealed tube can make inert electrode and external environment keep apart, to avoid extraneous gas, humidity etc. to cause interference to test.Also comprise binding parts, be arranged at the outside of two fixed heads, for tighten two fixed heads, thereby by the barrier film tighten between two fixed heads, two lithium sheets and two lithium sheets, lithium sheet can fully be contacted with barrier film.
Brief description of the drawings
For content of the present utility model is more easily understood, the utility model is further detailed content of the present utility model with embodiment by reference to the accompanying drawings;
Fig. 1 is the structural representation of the proving installation of electrolytic conductivity described in the utility model;
Fig. 2 is the schematic diagram of fixed head, lithium sheet, barrier film and test splice package assembly in electrolytic conductivity proving installation described in the utility model;
Fig. 3 is the structural representation of fixed head in electrolytic conductivity proving installation described in the utility model;
Wherein Reference numeral is: 1-cavity, and 2-fixed head, 3-lithium sheet, 4-barrier film, 5-test splice, 6-drainage tube, 7-groove, 8-through hole, 9-sealed tube, 10-binds parts.
Embodiment
The proving installation of electrolytic conductivity described in the utility model comprises, hold electrolytical cavity 1, described cavity 1 and extraneous seal isolation, the constituent material of described cavity 1 can be selected according to actual needs, and in the present embodiment, described cavity 1 is made up of the corrosion resistant Soft Roll material seal of inwall, the present embodiment is preferably by after aluminum plastic film doubling, both sides heat-sealing, top also seals, thereby forms seal chamber 1.In described cavity 1, two insulation fixing plates 2 that are oppositely arranged, the material of fixed head 2 can be that the insulating material of the present embodiment preferred fabrication fixed head 2 is PET plastics according to the alternative any insulating material of actual conditions.Two lithium sheets 3, between two fixed heads 2, are clamped by described two fixed heads 2, and in order to improve reappearance and the accuracy of test, the present embodiment lithium sheet 3 that preferably two areas are equal is oppositely arranged to be tested.Lithium ion battery dedicated diaphragm 4 is clamped to be arranged between described two lithium sheets 3, described barrier film 4 is thinner, its thickness can be selected according to actual service condition, in the present embodiment, the thickness of described barrier film 4 is 5-30 μ m, and in order further to determine the test area of lithium sheet 3, the present embodiment preferably makes the lower space between described two lithium sheets 3 clamp described barrier film 4 is set, thereby the two lithium sheet 3 a certain fixed-areas in bottom are fully contacted with barrier film 4.Test splice 5, is separately positioned on described two lithium sheets 3, and described test splice 5 is for connecting outside testing tool or power supply, therefore need to have electric conductivity, in the present embodiment, described test splice 5 is inert electrode, is specially the stainless pin inserting in lithium sheet 3.
When use, electrolyte is injected in cavity 1 and makes liquid level just arrive the coboundary of barrier film 4, then proving installation is vertically put in insulation can into inert electrode connecting test instrument, after shelving a period of time, make electrolyte fully infiltrate lithium sheet 3 and barrier film 4, then conductivity test is carried out in energising.
On the basis of above-described embodiment, for the connection of stabilize lithium sheet 3 and fixed head 2, as interchangeable embodiment, as Figure 1-3, the sidepiece of described fixed head 2 is provided with groove 7, and described lithium sheet 3 embeds in described groove 7; The top of described fixed head 2 is provided with the through hole 8 connecting with described groove 7, and described test splice 5 is connected with lithium sheet 3 through described through hole 8; Also comprise sealed tube 9, sealing is nested with the outside of the described inert electrode above described fixed head 2; In the present embodiment, first be coated with one deck lug glue on stainless pin surface, then stainless pin inserted in sizeable sealed tube 9-polypropylene tube, the inner side of polypropylene tube and stainless pin form and closely cooperate, to prevent that air from entering, stainless steel is hedged off from the outer world; Finally stainless pin is inserted to lithium sheet 3 certain depths and on spigot point, solidify glue, when test, electric current imports lithium sheet 3 by stainless pin.Also comprise for to the electrolytical drainage tube 6 of the interior injection of described cavity 1, stretch in described cavity 1 and seal and be arranged between described cavity 1 inwall and fixed head 2, in the present embodiment, drainage tube 6 is two root polypropylenes (pp) pipes, be arranged at respectively the gap location of two fixed head 2 outsides and cavity 1 inwall, electrolyte directly can be introduced to the bottom of cavity 1.When use, the upper port of pp pipe is sealed in described cavity 1 after the interior injection electrolyte of cavity 1 by pp pipe.Also comprise binding parts 10, be arranged at the outside of two fixed heads 2, for tighten two fixed heads 2, the present embodiment adopts barrier film 4 twine some circles in two fixed head 2 outsides and fix with adhesive tape, also can use adhesive tape to be wrapped in fixed head 2 outsides and be fixed.And, also comprise isolated insulation layer, clamped being arranged between described two lithium sheets 3 is not filled with in the space of barrier film 4, in the present embodiment, described isolated insulation layer is high temperature gummed tape, it has blocked the charge-conduction of 3 of the lithium sheets that barrier film 4 parts are not set, and pays close attention to electrolytical injection liquid level and also can ensure that the test area of lithium sheet 3 is stable like this, thereby improved reappearance and the accuracy of test in the time of test without undue.
Although the utility model has carried out detailed elaboration by above-mentioned specific embodiment to it; but; those skilled in the art should be understood that; the any form that does not exceed claim protection domain made on this basis and the variation of details, all belong to the claimed scope of the utility model.
Claims (10)
1. a proving installation for electrolytic conductivity, is characterized in that, comprise,
Hold electrolytical cavity (1);
In described cavity (1), two insulation fixing plates (2) that are oppositely arranged;
Two lithium sheets (3), are positioned between two fixed heads (2), are clamped by described two fixed heads (2);
Barrier film (4), clamped being arranged between described two lithium sheets (3);
Test splice (5), is separately positioned on described two lithium sheets (3).
2. proving installation according to claim 1, is characterized in that, the thickness of described barrier film (4) is 5-30um.
3. proving installation according to claim 1 and 2, is characterized in that, the lower space between described two lithium sheets (3) clamps described barrier film (4) is set.
4. proving installation according to claim 3, is characterized in that, also comprises isolated insulation layer, and clamped being arranged between described two lithium sheets (3) is not filled with in the space of barrier film (4).
5. according to the proving installation described in claim 1 or 2 or 4, it is characterized in that, described cavity (1) is made up of the corrosion resistant Soft Roll material seal of inwall.
6. proving installation according to claim 5, is characterized in that, also comprises for inject electrolytical drainage tube (6) in described cavity (1), stretches in described cavity (1) and seal to be arranged between described cavity (1) inwall and fixed head (2).
7. according to the proving installation described in claim 1 or 2 or 4 or 6, it is characterized in that, the sidepiece of described fixed head (2) is provided with groove (7), and described lithium sheet (3) embeds in described groove (7); The top of described fixed head (2) is provided with the through hole (8) connecting with described groove (7), and described test splice (5) is connected with lithium sheet (3) through described through hole (8).
8. proving installation according to claim 7, is characterized in that, described test splice (5) is inert electrode, and described inert electrode is connected with lithium sheet (3) through described through hole (8).
9. proving installation according to claim 8, is characterized in that, also comprises sealed tube (9), and sealing is nested with the outside at the described inert electrode of described fixed head (2) top.
10. according to the proving installation described in claim 1 or 2 or 4 or 6 or 8 or 9, it is characterized in that, also comprise binding parts (10), be arranged at the outside of two fixed heads (2), for tighten two fixed heads (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420249005.3U CN203909142U (en) | 2014-05-15 | 2014-05-15 | Testing device of electrical conductivity of electrolyte |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420249005.3U CN203909142U (en) | 2014-05-15 | 2014-05-15 | Testing device of electrical conductivity of electrolyte |
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| Publication Number | Publication Date |
|---|---|
| CN203909142U true CN203909142U (en) | 2014-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420249005.3U Expired - Fee Related CN203909142U (en) | 2014-05-15 | 2014-05-15 | Testing device of electrical conductivity of electrolyte |
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| CN (1) | CN203909142U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106896271A (en) * | 2017-03-10 | 2017-06-27 | 深圳中兴创新材料技术有限公司 | A kind of apparatus and method for the test of battery diaphragm electrical conductivity |
| CN117110712A (en) * | 2023-08-08 | 2023-11-24 | 江苏风驰碳基新材料研究院有限公司 | Positive electrode ion conductivity testing device of sodium ion battery |
-
2014
- 2014-05-15 CN CN201420249005.3U patent/CN203909142U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106896271A (en) * | 2017-03-10 | 2017-06-27 | 深圳中兴创新材料技术有限公司 | A kind of apparatus and method for the test of battery diaphragm electrical conductivity |
| CN106896271B (en) * | 2017-03-10 | 2023-03-28 | 深圳中兴新材技术股份有限公司 | Device and method for testing conductivity of battery diaphragm |
| CN117110712A (en) * | 2023-08-08 | 2023-11-24 | 江苏风驰碳基新材料研究院有限公司 | Positive electrode ion conductivity testing device of sodium ion battery |
| CN117110712B (en) * | 2023-08-08 | 2024-04-12 | 江苏风驰碳基新材料研究院有限公司 | Positive electrode ion conductivity testing device of sodium ion battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180517 Address after: No. 188, Miyun District, Miyun District, Beijing, Beijing Patentee after: Beijing treasure Car Co.,Ltd. Address before: 102206, Beijing, Shahe Town, Changping District Road, sand Yang Patentee before: BEIQI FOTON MOTOR Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141029 |