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Battery diaphragm material and battery with corresponding diaphragm

A battery diaphragm and layer material technology, applied in the direction of nickel storage batteries, alkaline storage batteries, battery pack components, etc., can solve the problems of increasing the manufacturing process and cost of the diaphragm, difficulty in maintaining durability, and reducing the gas permeability of the diaphragm.

Inactive Publication Date: 2013-11-20
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the use of the diaphragm, the penetration of the electrolyte will be formed at the rolling point, and the existence of the rolling point also reduces the air permeability of the diaphragm; on the other hand, only the use of polyethylene emulsion coating in this embodiment is beneficial to the subsequent Hydrophilic treatment, which increases the manufacturing process and cost of the diaphragm
[0008] It can be seen that the general hydrophilic treatment is difficult to maintain persistence, so it is necessary to improve the structure of the diaphragm

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Step 1: Prepare PP spunbond non-nipping point nonwoven fabric;

[0060] Using PP raw material with an MFI of 35, the Reicofil spinning web production line, if the production line is equipped with a splitter, close the splitter during the process. Spinneret extrusion rate 0.35g / (hole min), melt temperature 250°C, cooling air temperature 10°C, drafting air speed 3000m / min, suction air volume 10000m 3 / h, wind pressure 1500Pa. Formed fiber diameter is 40μm, area density is 40g / m 2 , Non-rolling point spunbonded nonwoven fabric with a thickness of 1mm. It has been determined that the average orientation angle of the fibers in the non-nipping point PP spunbonded nonwoven fabric along the length direction of the fiber web is 16°.

[0061] The second step: preparing PP melt-blown nonwoven fabric;

[0062] Using PP resin with an MFI of 500g / 10min, the melt of the melt-blown fiber layer is extruded from the spinneret hole of the screw extruder and then drawn to the receiver ...

Embodiment 2

[0065] The first step: prepare PE spunbond non-nipping point nonwoven fabric;

[0066] Use Sinopec’s 1I30A, MFI 30g / 10min PE raw material, Reicofil spinning web production line, if the production line is equipped with a splitter, close the splitter during the process. Spinneret extrusion rate 0.28g / (hole min), melt temperature 250°C, cooling temperature 10°C, drafting air velocity 4200m / min, suction air volume 9000m 3 / h, wind pressure 1100Pa. Formed fibers with a diameter of 20μm and a surface density of 10g / m 2 , Thickness of 0.03mm non-nipping point spunbonded nonwoven fabric. It was determined that the average fiber orientation angle of the prepared PE spunbonded non-nipping point nonwoven fabric was 26°.

[0067]The second step: preparing PE meltblown nonwoven fabric;

[0068] The PE resin produced by Sinopec with the brand name of 888-000 and MFI of 30g / 10min is used. After the melt of the melt-blown fiber layer is extruded from the spinneret hole of the screw extrud...

Embodiment 3

[0071] Step 1: Prepare PP spunbond non-nipping point nonwoven fabric;

[0072] Using PP raw material with an MFI of 35, the Reicofil spinning web production line, if the production line is equipped with a splitter, close the splitter during the process. Spinneret extrusion rate 0.32g / (hole min), melt temperature 250°C, cooling air temperature 10°C, drafting air speed 4000m / min, suction air volume 9500m 3 / h, wind pressure 1300Pa. Formed fibers with a diameter of 28μm and a surface density of 30g / m 2 , PP non-rolling point spunbonded nonwoven fabric with a thickness of 0.5mm. It was determined that the average orientation angle of the fibers of the prepared PP spunbonded non-nipping point nonwoven fabric was 21°.

[0073] The second step: preparing PP melt-blown nonwoven fabric;

[0074] Using PP resin with an MFI of 500g / 10min, the melt of the melt blown fiber layer is extruded from the spinneret hole of the screw extruder and drawn onto the receiving roller by hot air at ...

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Abstract

The invention relates to a battery diaphragm material and a battery with a corresponding diaphragm. The battery diaphragm material at least comprises two layers of materials, which are composited together, wherein a layer of material is obvious in fiber orientation arrangement, and the other layer of material is small in aperture size but large in porosity and is of a three-dimensional network structure; the two layers of materials are composited through a non-hot-rolling process; the surface density of the battery diaphragm material is 40g / m<2> to 100g / m<2>, the alkaline absorption speed of the material is 8cm / 30min to 15cm / 30min, and the alkaline absorption rate of the material is 300 to 500 percent; the statistical value of an average fiber orientation angle of the material obvious in fiber orientation arrangement is less than 30 degrees; the surface density of the material, which is small in aperture size but large in porosity and is of the three-dimensional network structure, is 20g / m<2> to 60g / m<2>, the aperture of the material is 0.5 to 30 microns, and the porosity of the material is 75 to 95 percent. The battery comprises a positive plate, a negative plate, an alkaline electrolyte, and the battery diaphragm between the positive plate and the negative plate. The specific discharge capacity of the battery is more than 280mAh / g, and the discharge capacity retention ratio of the battery is more than 70 percent.

Description

technical field [0001] The invention relates to a battery diaphragm material and a battery using the diaphragm, in particular to a battery diaphragm material with high alkali absorption rate and alkali absorption speed obtained by arranging the fibers in the diaphragm and using the diaphragm. The separator battery, specifically, is a composite battery separator material comprising at least two layers and a battery using the separator. Background technique [0002] The battery separator is a porous material placed between the positive and negative electrodes of the battery. It is a very critical component of the battery. past effect. The quality of separator materials has a significant impact on battery capacity, discharge voltage, self-discharge, cycle life, safety and cost. [0003] With the development of modern textile industry technology, more and more battery separators are produced by non-woven technology in the world. The reason is that the non-woven process is shor...

Claims

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Application Information

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IPC IPC(8): H01M2/16H01M10/30D04H3/02H01M50/403H01M50/44H01M50/449H01M50/489H01M50/491
CPCY02E60/124Y02E60/10
Inventor 王洪张艳靳向煜吴海波
Owner DONGHUA UNIV
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