WO2020173120A1 - Chuck for lithium ion battery diaphragm wet compression test and test method thereof - Google Patents
Chuck for lithium ion battery diaphragm wet compression test and test method thereof Download PDFInfo
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- WO2020173120A1 WO2020173120A1 PCT/CN2019/114908 CN2019114908W WO2020173120A1 WO 2020173120 A1 WO2020173120 A1 WO 2020173120A1 CN 2019114908 W CN2019114908 W CN 2019114908W WO 2020173120 A1 WO2020173120 A1 WO 2020173120A1
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- ion battery
- groove
- lithium ion
- test
- clamp
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
Definitions
- the invention belongs to the field of compression performance testing, relates to the field of wet compression performance of lithium ion battery diaphragms, and in particular relates to a clamp for wet compression test of lithium ion battery diaphragms and a test method thereof.
- Lithium-ion battery is a popular energy device, and one of its important components is the diaphragm, which plays a key role in the safety of battery use. Since lithium-ion batteries are environmentally friendly and pollution-free secondary batteries, they meet the development needs of energy and environmental protection in various countries today, and their use in various industries is rapidly increasing.
- Lithium-ion battery cells are mainly composed of positive electrode material, negative electrode material, electrolyte and diaphragm.
- the diaphragm acts as an electronic isolation, preventing direct contact between the positive and negative electrodes and allowing lithium ions in the electrolyte to be free
- the diaphragm also plays a vital role in ensuring the safe operation of the battery.
- the diaphragm must meet the following conditions: (1) Chemical stability: no reaction with electrolyte and electrode materials; (2) wettability: with electrolyte Easy to infiltrate without elongation or shrinkage; (3) Thermal stability: resistant to high temperature, with high fusing isolation; (4) Porosity: higher porosity to meet the needs of ion conductivity; (5) Mechanical properties: The separator needs to have a certain mechanical strength in the battery structure and the process of charging and discharging.
- the separator An important function of the separator is to separate the positive and negative reactions. If the separator shrinks or ruptures and causes the electrolyte to penetrate, a battery short circuit will occur. , Has a great safety hazard, so the diaphragm needs to have certain mechanical strength and toughness. In addition, the diaphragm material should also have a certain tensile strength. The lithium ion battery will release or absorb heat during the reaction, and the diaphragm will respond accordingly. Swelling and shrinking, if the tensile strength of the diaphragm is not enough, it will cause the diaphragm to break and cause a short circuit.
- the performance of the separator determines the interface structure of the battery, the retention of the electrolyte, and the internal resistance of the battery, which in turn affects the key performance of the battery, such as the capacity, cycle performance, and charge and discharge current density. Therefore, the performance of the separator directly affects the overall performance of the battery.
- the diaphragm is under pressure between the positive and negative electrodes and is immersed in the electrolyte for a long time, so the wet compression performance of the diaphragm is very important.
- most of the current researches focus on the tensile and compressive properties of dry-state separators of lithium-ion batteries, and there is a lack of research on the separator's wet-state compression properties.
- the purpose of the present invention is to provide a clamp and a test method for the wet compression test of a lithium ion battery separator in view of the above-mentioned shortcomings of the prior art.
- a fixture suitable for testing the wet compression performance of the film is designed. The characteristic is that the existence of the liquid is fully considered, and how to discharge the liquid reasonably during the compression process, so as not to interfere with the experimental results.
- a fixture for the wet compression test of the lithium ion battery diaphragm comprising: an indenter and an indenter matching the shape and size of the indenter;
- the indenter includes a cylinder, and the center of the upper end of the cylinder is provided with a first fixed fin for clamping on the tensile and compression testing machine;
- the pressure groove includes a columnar groove, and a second fixed fin for clamping on the tensile and compression testing machine is provided at the center of the lower end surface of the bottom of the columnar groove;
- the pressure head is embedded in the cylindrical groove where the lithium ion battery diaphragm is placed.
- a vertical groove for discharging air when the pressure head is pressed down is distributed on the inner side of the column wall of the columnar groove.
- the bottom end of the column wall of the columnar groove is provided with a liquid outlet groove for squeezing and discharging the electrolyte liquid during compression.
- a liquid storage tank is ringed on the outside of the bottom of the column wall of the columnar groove, and the electrolyte discharged during compression is introduced into the liquid storage tank through the liquid outlet groove on the column wall of the columnar groove.
- 4 vertical grooves are evenly distributed on the inner side of the column wall of the columnar groove.
- the groove shape of the liquid outlet groove includes at least one of a circular shape, an oval shape and a polygon shape.
- the groove type of the liquid storage tank is a continuous ring groove, which is used to temporarily store the electrolyte that is discharged during the compression test, and it needs to be sucked away with a straw and handled properly.
- the present invention also provides a test method of a clamp for wet compression test of lithium ion battery diaphragm, including the following steps:
- the number of layers of the lithium ion battery separator in step 2) is 30-50.
- the lithium ion battery electrolyte in step 3) is LiPF 6 /EC+DMC+DEC, wherein the concentration of LiPF 6 is 1 mol/L, and the volume ratio of the three solvents EC, DMC and DEC is 1:1:1.
- the present invention has the following advantages and beneficial effects:
- the groove is designed, taking into account the discharge of electrolyte during the compression process
- the present invention provides a fixture for wet compression test of lithium ion battery diaphragm and its test method.
- Figure 1 is a schematic diagram of a diaphragm wet compression fixture
- Figure 2 is the indenter in the fixture
- Figure 3 shows the pressure groove in the fixture.
- This embodiment provides a fixture for the wet compression test of a lithium ion battery diaphragm and a test method thereof.
- the clamp includes the following components: an indenter 1 and an indenter 2 with matching indenter shape and size.
- the indenter 2 includes a cylinder 3; the center of the upper end of the cylinder 3 is provided with a first fixed fin 4 for clamping on a tensile and compression testing machine.
- the pressure groove 2 includes a cylindrical groove 5, and a second fixing fin 6 for clamping on the tensile and compression testing machine is provided at the center of the lower end of the bottom of the cylindrical groove 5 for clamping on the tensile tester.
- the extension compression testing machine On the extension compression testing machine; on the inner side of the column wall of the cylindrical groove 5, there are 4 vertical grooves 7 for discharging air when the indenter is pressed down, which are used to discharge air when the indenter is pressed down;
- the bottom end of the column wall is evenly distributed with 4 quadrilateral outlet grooves 8 for the extrusion and discharge of the electrolyte liquid when the compression is in progress;
- the cylindrical groove 5 is surrounded by a liquid storage tank 9 outside the bottom of the column wall, when the compression is in progress
- the discharged electrolyte is introduced into the storage tank 9 through the outlet tank 8 on the column wall of the cylindrical groove 5 for temporary storage of the electrolyte discharged during the compression test. It needs to be sucked away with a straw and properly disposed of .
- the test method includes the following steps:
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Abstract
Description
Claims (10)
- 一种用于锂离子电池隔膜湿态压缩试验的夹具,其特征在于包括:压头(1)以及与压头形状和尺寸相匹配的压槽(2);A clamp for wet compression test of lithium ion battery diaphragm, which is characterized by comprising: an indenter (1) and an indenter (2) matching the shape and size of the indenter;所述压头(1)包括圆柱体(3),圆柱体(3)上端面中心设置有用于装夹在拉伸压缩试验机上的第一固定翅(4);The indenter (1) includes a cylinder (3), and the center of the upper end of the cylinder (3) is provided with a first fixed fin (4) for clamping on a tensile and compression testing machine;所述压槽(2)包括柱状凹槽(5),柱状凹槽(5)的底部下端面中心处设置有用于装夹在拉伸压缩试验机上的第二固定翅(6);The pressure groove (2) includes a cylindrical groove (5), and a second fixed fin (6) for clamping on the tensile and compression testing machine is provided at the center of the bottom lower end surface of the cylindrical groove (5);所述压头(1)的圆柱体(3)嵌入置有锂离子电池隔膜的柱状凹槽(5)内。The cylinder (3) of the pressure head (1) is embedded in the cylindrical groove (5) where the lithium ion battery diaphragm is placed.
- 根据权利要求1所述的用于锂离子电池隔膜湿态压缩试验的夹具,其特征在于,所述柱状凹槽(5)的柱壁内侧上分布有用于压头下压时排出空气的竖直沟槽(7)。The clamp for wet compression test of lithium-ion battery diaphragm according to claim 1, characterized in that, on the inner side of the column wall of the columnar groove (5) is distributed a vertical for exhausting air when the pressure head is pressed down. Groove (7).
- 根据权利要求1所述的用于锂离子电池隔膜湿态压缩试验的夹具,其特征在于,所述柱状凹槽(5)的柱壁最底端分布有出液槽(8),用于当压缩进行时电解液的挤出排放。The clamp for wet compression test of lithium ion battery diaphragm according to claim 1, characterized in that, the bottom end of the column wall of the columnar groove (5) is distributed with an outlet groove (8) for when Extrusion and discharge of electrolyte during compression.
- 根据权利要求1所述的用于锂离子电池隔膜湿态压缩试验的夹具,其特征在于,在所述柱状凹槽(5)的柱壁底部外侧环设储液槽(9),当压缩进行时排放的电解液通过柱状凹槽(5)柱壁上的出液槽(8)引入储液槽(9)内。The clamp for wet compression test of lithium ion battery diaphragm according to claim 1, characterized in that, a liquid storage tank (9) is ringed outside the bottom of the column wall of the columnar groove (5), and when the compression is performed The electrolyte discharged at the time is introduced into the liquid storage tank (9) through the liquid outlet groove (8) on the column wall of the cylindrical groove (5).
- 根据权利要求2所述的用于锂离子电池隔膜湿态压缩试验的夹具,其特征在于,所述柱状凹槽(5)的柱壁内侧上均匀分布4根竖直沟槽(7)。The clamp for wet compression test of lithium ion battery diaphragm according to claim 2, characterized in that, 4 vertical grooves (7) are evenly distributed on the inner side of the column wall of the columnar groove (5).
- 根据权利要求3所述的用于锂离子电池隔膜湿态压缩试验的夹具,其特征在于,所述柱状凹槽(5)的柱壁最底端均匀分布4个出液槽(8),所述出液槽(8)的槽型包括圆形、椭圆形、及多边形中的至少一种。The clamp for wet compression test of lithium ion battery diaphragm according to claim 3, characterized in that the bottom end of the column wall of the columnar groove (5) is evenly distributed with 4 outlet grooves (8), so The groove type of the liquid groove (8) includes at least one of a circle, an ellipse, and a polygon.
- 根据权利要求4所述的用于锂离子电池隔膜湿态压缩试验的夹具,其特征在于,所述储液槽(9)的槽型为连续的圆环槽。The clamp for wet compression test of lithium ion battery diaphragm according to claim 4, characterized in that the groove type of the liquid storage tank (9) is a continuous annular groove.
- 一种利用根据权利要求1所述的用于锂离子电池隔膜湿态压缩试验的夹具的试验方法,其特征在于,包括以下步骤:A test method using the clamp for wet compression test of lithium ion battery separator according to claim 1, characterized in that it comprises the following steps:1)将压头(1)与压槽(2)分别装夹在拉伸-压缩试验机上,并进行对准;1) Clamp the indenter (1) and the indenter (2) on the tensile-compression testing machine respectively, and align them;2)将与柱状凹槽(5)尺寸相匹配的锂离子电池隔膜放置于柱状凹槽(5)内;2) Place the lithium-ion battery diaphragm matching the size of the cylindrical groove (5) in the cylindrical groove (5);3)向柱状凹槽(5)内注入锂离子电池电解液,确保所述隔膜被电解液浸润;3) Inject lithium-ion battery electrolyte into the cylindrical groove (5) to ensure that the diaphragm is infiltrated by the electrolyte;4)对隔膜进行预压紧,以排出隔膜层间的空气,然后开始压缩试验;4) Pre-compact the diaphragm to discharge the air between the diaphragm layers, and then start the compression test;5)试验结束后,排出储液槽(9)的电解液。5) After the test, drain the electrolyte from the storage tank (9).
- 根据权利要求8所述的利用用于锂离子电池隔膜湿态压缩试验的夹具的试验方法,其特征在于,步骤2)中所述锂离子电池隔膜的层数为30-50。The test method using a clamp for wet compression test of lithium ion battery separator according to claim 8, wherein the number of layers of the lithium ion battery separator in step 2) is 30-50.
- 根据权利要求8所述的利用用于锂离子电池隔膜湿态压缩试验的夹具的试验方法,其特征在于,步骤3)中锂离子电池电解液为LiPF 6/EC+DMC+DEC,其中LiPF 6的浓度为1mol/L,溶剂EC、DMC和DEC三者的体积比为1∶1∶1。 The test method using a clamp for wet compression test of lithium ion battery separators according to claim 8, wherein the electrolyte of the lithium ion battery in step 3) is LiPF 6 /EC+DMC+DEC, wherein LiPF 6 The concentration is 1mol/L, and the volume ratio of the solvents EC, DMC and DEC is 1:1:1.
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CN201910152602.1A CN109738281A (en) | 2019-02-28 | 2019-02-28 | Fixture and its test method for lithium ion battery separator hygrometric state compression test |
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CN109738281A (en) * | 2019-02-28 | 2019-05-10 | 华南理工大学 | Fixture and its test method for lithium ion battery separator hygrometric state compression test |
CN112730044A (en) * | 2020-12-09 | 2021-04-30 | 华南理工大学 | Clamp for compressing membrane of infiltration-state lithium ion battery and test method thereof |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06331521A (en) * | 1993-05-24 | 1994-12-02 | Sumitomo Metal Mining Co Ltd | Method and apparatus for measuring tensile strength of fragile solid material and the like |
CN201803930U (en) * | 2010-09-19 | 2011-04-20 | 熊利军 | Tester for wet state pressure maintaining performance of AGM separator |
CN201983985U (en) * | 2010-12-28 | 2011-09-21 | 中材科技股份有限公司 | Device for measuring thickness and pressure of multi-component fiber battery separator under moist state |
CN102359911A (en) * | 2011-07-31 | 2012-02-22 | 风帆股份有限公司 | Electrode group pressure and acid absorption quantity measurement method for absorptive glass mat (AGM) lead-acid storage battery |
CN109030173A (en) * | 2018-07-10 | 2018-12-18 | 华南理工大学 | Test the infiltration type device and method of lithium ion battery separator hygrometric state puncture strength |
CN109738281A (en) * | 2019-02-28 | 2019-05-10 | 华南理工大学 | Fixture and its test method for lithium ion battery separator hygrometric state compression test |
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CN108709804A (en) * | 2018-06-22 | 2018-10-26 | 华南理工大学 | A kind of device and its test method for lignin tension test |
CN209764575U (en) * | 2019-02-28 | 2019-12-10 | 华南理工大学 | Clamp for lithium ion battery diaphragm wet compression test |
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Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06331521A (en) * | 1993-05-24 | 1994-12-02 | Sumitomo Metal Mining Co Ltd | Method and apparatus for measuring tensile strength of fragile solid material and the like |
CN201803930U (en) * | 2010-09-19 | 2011-04-20 | 熊利军 | Tester for wet state pressure maintaining performance of AGM separator |
CN201983985U (en) * | 2010-12-28 | 2011-09-21 | 中材科技股份有限公司 | Device for measuring thickness and pressure of multi-component fiber battery separator under moist state |
CN102359911A (en) * | 2011-07-31 | 2012-02-22 | 风帆股份有限公司 | Electrode group pressure and acid absorption quantity measurement method for absorptive glass mat (AGM) lead-acid storage battery |
CN109030173A (en) * | 2018-07-10 | 2018-12-18 | 华南理工大学 | Test the infiltration type device and method of lithium ion battery separator hygrometric state puncture strength |
CN109738281A (en) * | 2019-02-28 | 2019-05-10 | 华南理工大学 | Fixture and its test method for lithium ion battery separator hygrometric state compression test |
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