CN209513683U - A kind of test device of lithium ion battery separator closed pore, broken film temperature - Google Patents
A kind of test device of lithium ion battery separator closed pore, broken film temperature Download PDFInfo
- Publication number
- CN209513683U CN209513683U CN201822176057.3U CN201822176057U CN209513683U CN 209513683 U CN209513683 U CN 209513683U CN 201822176057 U CN201822176057 U CN 201822176057U CN 209513683 U CN209513683 U CN 209513683U
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- CN
- China
- Prior art keywords
- temperature
- diaphragm
- closed pore
- lithium ion
- broken film
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000011148 porous material Substances 0.000 title claims abstract description 27
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims description 23
- 229910001416 lithium ion Inorganic materials 0.000 title claims description 23
- 238000010438 heat treatment Methods 0.000 claims abstract description 26
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 2
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 2
- 239000010453 quartz Substances 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 230000009970 fire resistant effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 10
- 239000003792 electrolyte Substances 0.000 abstract description 5
- 230000035699 permeability Effects 0.000 abstract description 5
- 238000010998 test method Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 239000012528 membrane Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000007773 negative electrode material Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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- Examining Or Testing Airtightness (AREA)
Abstract
The utility model relates to a kind of battery septum closed pore temperature, the test method of broken film temperature and devices.The battery septum closed pore temperature, broken film temperature test device, successively include: air transporting arrangement, U-tube road, diaphragm clamping device, spinner flowmeter, diaphragm heating device, temperature sensor.Diaphragm is clamped using diaphragm clamping device while reducing caliber, connection upper gas sensor.The air pressure of heating device end declines suddenly, is placed in the temperature that part air pressure balance ball is flown up in environment, is the closed pore temperature of diaphragm；The air pressure of heating device end is flown up, and is placed in the temperature that partial gas pressure in environment declines suddenly, is the broken film temperature of diaphragm.Compared with the existing technology, the utility model uses pressure differential method, avoids the use of electrolyte, reduces environmental pollution；Without using the expensive instrument such as Permeability gauge, internal resistance instrument, cost has been saved.
Description
Technical field
The utility model relates to lithium ion battery separator manufacturing technology fields, and in particular to a kind of lithium ion battery every
The closed pore temperature of film and the test method of broken film temperature and device.
Background technique
Lithium ion battery is wide because having many advantages, such as that specific energy is high, have extended cycle life, environmental pollution is small, memory-less effect
It is general to be applied to 3C, electric car and energy storage field.But the safety of lithium ion battery can not still make its large-scale application.
Diaphragm is the important materials of lithium ion battery, it embodies two kinds of important functions: first is that guarantee cell safety, second is that
It is achieved battery function relevant to charge and discharge.Its basic effect is isolation positive plate and negative electrode tab, avoids short circuit.Together
When, using the microcellular structure of diaphragm, the working mechanism based on lithium ion battery, when charging lithium ion deviate from from positive electrode,
It is embedded between the layer structure of negative electrode material across diaphragm migration；When electric discharge lithium ion from negative electrode material abjection, pass back through every
Film is migrated again in insertion positive electrode.
Temperature when closed pore temperature is diaphragm micro-hole closure.When battery occur internal short-circuit, overcharge, external short circuit when, meeting
A large amount of heat is generated, inside battery is made to heat up.When temperature reaches diaphragm closed pore temperature, micropore closure hinders the biography of lithium ion
It is defeated, the internal resistance of cell is steeply risen, the generation of battery thermal runaway is avoided.When internal temperature of battery be more than diaphragm closed pore temperature after
Continuous diaphragm fusing generates big pore structure when rising, and causes positive and negative anodes directly to contact and short-circuit, for the broken film temperature of diaphragm.Every
After film rupture, there is the danger that explosion on fire occurs in battery.Therefore, lithium ion battery is low using closed pore temperature, broken film temperature is high
Diaphragm, safety can increase.
The method of test diaphragm closed pore temperature and broken film temperature has conductivity to be mutated method, sudden change of resistivity method, air permeability at present
With microscopic observation, pressure jump method etc..Diaphragm need to be infiltrated electrolyte and need valuableness by conductivity and the method for sudden change of resistivity
Instrument, it is complicated for operation.The method of air permeability need to be used in conjunction with Permeability gauge, expensive equipment and be difficult to continuously measure.Publication No.
The patent of CN105738404A uses pressure application, need to be every certain time although avoiding the use of electrolyte and expensive instrument
Gas is injected, it is cumbersome.
Therefore, it is not high that a kind of pair of equipment requirement need to be sought, simply, convenient, accurate test method and device, come measure every
The closed pore temperature and broken film temperature of film.
Utility model content
The utility model provides the test device and method of a kind of lithium ion battery separator closed pore, broken film temperature, avoids
The use of electrolyte and expensive instrument.
The test device of a kind of lithium ion battery separator closed pore, broken film temperature, including air transporting arrangement, pressure reducing valve are U-shaped
Pipeline, diaphragm clamping device, diaphragm heating device, gas piping, spinner flowmeter, temperature sensor, the gas conveying
Device is equipped with pressure reducing valve, and is connected with U-tube road by rubber tube, and the U-tube road two sides top is equipped with diaphragm
Clamping device, the diaphragm clamping device are connected by gas piping with spinner flowmeter, wherein side U-tube road, diaphragm
It is equipped with heating device between clamping device and spinner flowmeter, is equipped with temperature sensor, the temperature in the heating device
Degree sensor directly surveys heating device inner septum surface temperature.
Diaphragm clamping device is porous hollow metal component, taper crossover sub three parts by gasket, upper and lower surface
It constitutes, three parts seamless connection, gasket is retractable, facilitates placement diaphragm.
Spinner flowmeter detectable gas range of flow is 0 ~ 500mL/min.
Have one and the consistent hole of U-tube road caliber below heating device, top have one it is consistent with gas piping (6)
Hole.
Gas piping is transparent high temperature resistant material, can be one of high temperature resistant quartz, polymethyl methacrylate.
The caliber on U-tube road is greater than gas piping.
Gas initial flow is adjusted such that the float position of two sides spinner flowmeter is identical, the float position in spinner flowmeter
Setting in optimal among scale.
Heating device can realize controllable heating, achievable since room temperature, be increased with the heating rate of 2 ~ 10 DEG C/min, temperature
Degree sensor directly surveys heating device inner septum surface temperature.
The present invention uses pressure differential method, and detection is easy, easy to operate, and avoids the use of electrolyte, reduces environment
Pollution；Without using the expensive instrument such as Permeability gauge, internal resistance instrument, cost has been saved.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the test device of the utility model；
1- air transporting arrangement；2- pressure reducing valve；3-U type pipeline；4- diaphragm clamping device；5- diaphragm heating device；6- gas
Body pipeline；7- spinner flowmeter；8- temperature sensor.
Specific embodiment
Utility model device and test procedure are described further below by embodiment, but embodiment is not intended to limit
The protection scope of the utility model.
The test device of a kind of lithium ion battery separator closed pore, broken film temperature, the gas including can at the uniform velocity convey gas are defeated
Send device (1)；Can fine adjustment flow pressure reducing valve (2)；The U-tube road (3) that top port flushes；By gasket, upper and lower two
Face is the diaphragm clamping device (4) of porous hollow metal component, taper crossover sub three parts composition；There are upper and lower two holes
Diaphragm heating device (5), lower square hole is consistent with U-tube road caliber, and upper aperture and gas piping (6) are consistent；Detectable gas stream
The spinner flowmeter (7) that range is 0 ~ 500mL/min is measured, the temperature sensor (8) of membrane surface temperature can be directly surveyed, it is described
Air transporting arrangement (1) is equipped with pressure reducing valve (2), and is connected to U-tube road (3) by the way that rubber tube is seamless, the U-tube road
(3) two sides top is successively arranged diaphragm clamping device (4), between the diaphragm clamping device (4) and spinner flowmeter (7)
It is connected by gas piping (6), is wherein equipped with and adds between side U-tube road (3), diaphragm clamping device (4) and gas piping (6)
Thermal (5), is equipped with temperature sensor (8) in the heating device (5), and the temperature sensor (8) directly surveys heating
Device inner septum surface temperature.
Specifically, using caliber for the U-tube of 5cm, caliber is the gas piping of 0.8cm, and spinner flowmeter selects FL-
10A-V。
Specific step is as follows:
1) clamping membrane portions on the left of U-shaped pipe are placed in heating device, right side is placed in room temperature environment；
2) 5cm*5cm two panels diaphragm is cut, and the two panels diaphragm sample cut is separately fixed at the specified of U-tube road
Position；
2) setting heating device is heated up with the heating rate of 5 DEG C/min from 25 DEG C of room temperature, while gas being continued at the uniform velocity
In import pipe, read the spinner flowmeter at U-tube both ends identical；
3) observation spinner flowmeter reading, takes left rotor meter readings to decline suddenly, right rotor meter readings
The temperature spot flown up is the initial closed pore temperature of diaphragm sample；Left rotor meter readings are taken to fly up, right side turns
The temperature spot that sub- meter readings decline suddenly is the initial broken film temperature of diaphragm sample；
4) repetitive operation above-mentioned steps 1) ~ 4) at least three times, and take and measure initial closed pore temperature and initial rupture of membranes temperature every time
Closed pore temperature and broken film temperature of the average value of degree as the film.
The different diaphragm sample tests of table 1
The different diaphragm sample tests of table 1
。
Claims (8)
1. the test device of a kind of lithium ion battery separator closed pore, broken film temperature, it is characterised in that: including air transporting arrangement
(1), pressure reducing valve (2), U-tube road (3), diaphragm clamping device (4), diaphragm heating device (5), gas piping (6), spinner
It counts (7), temperature sensor (8), the air transporting arrangement (1) is equipped with pressure reducing valve (2), and passes through rubber with U-tube road (3)
Sebific duct is connected, and described U-tube road (3) the two sides top is successively arranged diaphragm clamping device (4), and the diaphragm clamps dress
Set (4) and be connected with spinner flowmeter (7) by gas piping (6), wherein side U-tube road (3), diaphragm clamping device (4) and
Heating device (5) are equipped between spinner flowmeter (7), are equipped with temperature sensor (8) in the heating device (5), it is described
Temperature sensor (8) directly surveys heating device inner septum surface temperature.
2. the test device of a kind of lithium ion battery separator closed pore according to claim 1, broken film temperature, feature exist
In: diaphragm clamping device (4) by gasket, upper and lower surface it is that porous hollow device, taper crossover sub are constituted, and taper group
Part and the seamless connection of Porous hollow component, gasket is retractable, facilitates placement diaphragm.
3. the test device of a kind of lithium ion battery separator closed pore according to claim 1, broken film temperature, feature exist
In: spinner flowmeter (7) detectable gas range of flow is 0 ~ 500mL/min.
4. the test device of a kind of lithium ion battery separator closed pore according to claim 1, broken film temperature, feature exist
In: one and U-tube road (3) consistent hole of caliber are equipped with below heating device, top is equipped with one and gas piping (6) are consistent
Hole, the caliber of U-tube road (3) is greater than the caliber of gas piping (6).
5. the test device of a kind of lithium ion battery separator closed pore according to claim 1, broken film temperature, feature exist
In: gas piping (6) is fire resistant apparatus, can be one of high temperature resistant quartz, polymethyl methacrylate.
6. the test device of a kind of lithium ion battery separator closed pore according to claim 1, broken film temperature, feature exist
In: the caliber of gas piping (6) is consistent with spinner flowmeter (7) lower port caliber.
7. the test device of a kind of lithium ion battery separator closed pore according to claim 1, broken film temperature, feature exist
In: gas initial flow is adjusted such that the float position of two sides spinner flowmeter is identical, the float position position in spinner flowmeter
Among scale.
8. the test device of a kind of lithium ion battery separator closed pore according to claim 1, broken film temperature, feature exist
In: heating device is increased with the heating rate of 2 ~ 10 DEG C/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822176057.3U CN209513683U (en) | 2018-12-24 | 2018-12-24 | A kind of test device of lithium ion battery separator closed pore, broken film temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822176057.3U CN209513683U (en) | 2018-12-24 | 2018-12-24 | A kind of test device of lithium ion battery separator closed pore, broken film temperature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209513683U true CN209513683U (en) | 2019-10-18 |
Family
ID=68196621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822176057.3U Withdrawn - After Issue CN209513683U (en) | 2018-12-24 | 2018-12-24 | A kind of test device of lithium ion battery separator closed pore, broken film temperature |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209513683U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109557127A (en) * | 2018-12-24 | 2019-04-02 | 中材锂膜有限公司 | The test method and device of a kind of lithium ion battery separator closed pore, broken film temperature |
-
2018
- 2018-12-24 CN CN201822176057.3U patent/CN209513683U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109557127A (en) * | 2018-12-24 | 2019-04-02 | 中材锂膜有限公司 | The test method and device of a kind of lithium ion battery separator closed pore, broken film temperature |
| CN109557127B (en) * | 2018-12-24 | 2024-07-16 | 中材锂膜有限公司 | Method and device for testing closed pore and rupture temperature of lithium ion battery diaphragm |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20191018 Effective date of abandoning: 20240716 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20191018 Effective date of abandoning: 20240716 |