阅读说明：本技术 一种隔膜涂覆控温料盒装置 (Diaphragm coating temperature control magazine device ) 是由 周阳 刘杲珺 徐萌 杨冬梅 杨鹏 甘珊珊 白耀宗 于 2021-07-16 设计创作，主要内容包括：本发明公开了一种隔膜涂覆控温料盒装置,包括浆料盒,浆料盒的一侧设有向内凹的料仓,料仓沿左右方向延伸,料仓的上下两侧分别设有上刮刀和下刮刀,料仓上设有进料口和回料口,浆料盒内部有空腔,空腔内设有循环液管道,循环液管道的一端为循环液入口、另一端为循环液出口,循环液入口和循环液出口均从浆料盒中穿出,浆料盒上设有向空腔内注入液体的注液口和将空腔内液体排出的排液口,进料口位于料仓上部且向上延伸从浆料盒上方穿出,回料口位于料仓下部且向下延伸从浆料盒下方穿出。本发明能够提升料仓内的浆料温度,降低浆料粘度,有效减少浆料在基膜上漏涂的缺陷,提高涂层完整性,从而使电池的安全性能提升。(The invention discloses a diaphragm coating temperature control material box device which comprises a slurry material box, wherein one side of the slurry material box is provided with a material bin which is inwards concave, the material bin extends along the left and right direction, the upper side and the lower side of the material bin are respectively provided with an upper scraper and a lower scraper, the material bin is provided with a feeding hole and a return hole, a cavity is arranged in the slurry material box, a circulating liquid pipeline is arranged in the cavity, one end of the circulating liquid pipeline is a circulating liquid inlet, the other end of the circulating liquid pipeline is a circulating liquid outlet, the circulating liquid inlet and the circulating liquid outlet both penetrate out of the slurry material box, the slurry material box is provided with a liquid injection hole for injecting liquid into the cavity and a liquid discharge hole for discharging the liquid in the cavity, the feeding hole is positioned at the upper part of the material bin and extends upwards to penetrate out of the upper part of the slurry material box, and the return hole is positioned at the lower part of the material bin and extends downwards to penetrate out of the lower part of the slurry material box. The invention can improve the temperature of the slurry in the storage bin, reduce the viscosity of the slurry, effectively reduce the defect of missing coating of the slurry on the base film, and improve the integrity of the coating, thereby improving the safety performance of the battery.)

1. The utility model provides a diaphragm coating accuse temperature magazine device, its includes thick liquids box, and one side of thick liquids box is equipped with the feed bin of indent, and the feed bin extends along left right direction, and the upper and lower both sides of feed bin are equipped with scraper and lower scraper respectively, are equipped with feed inlet and feed back mouth on the feed bin, its characterized in that: the inside cavity that has of thick liquids box is equipped with the circulation liquid pipeline in, and the one end of circulation liquid pipeline is circulation liquid entry, the other end and is the circulation liquid export, and circulation liquid entry and circulation liquid export are all worn out from the thick liquids box, be equipped with on the thick liquids box to the interior notes liquid mouth that injects liquid of cavity and with the interior liquid discharge outlet of cavity, the feed inlet is located feed bin upper portion and upwards extends and wears out from thick liquids box top, the feed back mouth is located feed bin lower part and downwardly extending and wears out from thick liquids box below.

2. The membrane coating temperature control cartridge device of claim 1, wherein: the circulating liquid pipeline is a coiled pipe.

3. The membrane coating temperature control cartridge device of claim 1, wherein: the circulating liquid inlet is positioned above the slurry box, and the circulating liquid outlet is positioned below the slurry box.

4. The membrane coating temperature control cartridge device of claim 1, wherein: the liquid injection port is positioned on the top surface of the slurry box, and the liquid discharge port is positioned on the bottom surface of the slurry box.

5. The membrane coating temperature control cartridge device of claim 1, wherein: the circulating liquid inlet and the circulating liquid outlet are positioned on the left part of the slurry box, and the liquid injection port and the liquid discharge port are positioned on the right part of the slurry box.

6. The membrane coating temperature control cartridge device of claim 1, wherein: the feed inlet is located the intermediate position on feed bin upper portion.

7. The membrane coating temperature control cartridge device of claim 1, wherein: the feed back mouth has two, and two feed back mouths are left feed back mouth and right feed back mouth respectively.

8. The membrane coating temperature control cartridge device of claim 7, wherein: and the left feed back port and the right feed back port are respectively positioned at the left end and the right end of the lower part of the storage bin.

9. The membrane coating temperature control cartridge device of claim 1, wherein: the section of the storage bin is trapezoidal.

Technical Field

The invention relates to a diaphragm coating temperature control material box device, and belongs to the technical field of lithium battery diaphragm production.

Background

The diaphragm plays a role in separating the anode and the cathode in the charge and discharge process of the lithium ion battery, preventing the two electrodes from contacting and short-circuiting, absorbing enough electrolyte, providing enough electrolyte lithium ion channels, having a micropore self-closing protection function and the like. The lithium ion conductivity of the separator is directly related to the overall performance of the lithium ion battery, and the performance of the separator determines the interface structure of the battery, the retentivity of electrolyte, the internal resistance of the battery and the like, so that the important characteristics of the battery, such as capacity, cycle performance, charge-discharge current density, safety and the like, are influenced. The diaphragm can also obtain higher heat resistance or liquid absorption through a coating mode, and the safety performance of the battery is further improved.

In the prior art, the process of coating the diaphragm is that the coating slurry is transferred to a material box and directly transferred to a gravure roller. However, the slurry has high viscosity, so that a coating leakage phenomenon is caused in the coating process, the integrity of the coating is influenced, and great hidden danger is generated on the subsequent battery safety.

Disclosure of Invention

The invention aims to provide a diaphragm coating temperature control material box device for quickly increasing the temperature of slurry in a cavity of a slurry material box and reducing the viscosity of the slurry, which is used for solving the technical problem of more coating omission caused by high viscosity of the slurry in the prior art.

The invention adopts the following technical scheme: the utility model provides a diaphragm coating accuse temperature magazine device, its includes thick liquids box, and one side of thick liquids box is equipped with the feed bin to the indent, and the feed bin extends along left right direction, and the upper and lower both sides of feed bin are equipped with scraper and lower scraper respectively, are equipped with feed inlet and feed back mouth on the feed bin, there is the cavity inside the thick liquids box, is equipped with circulation liquid pipeline in the cavity, and the one end of circulation liquid pipeline is circulation liquid entry, the other end for the export of circulation liquid, and circulation liquid entry and circulation liquid export are all worn out from the thick liquids box, be equipped with on the thick liquids box and pour into the notes liquid mouth of liquid and with the leakage fluid dram of liquid discharge in the cavity into the cavity in to the cavity, the feed inlet is located feed bin upper portion and upwards extends and wears out from thick liquids box top, the feed back mouth is located feed bin lower part and downwardly extending and wears out from thick liquids box below.

The circulating liquid pipeline is a coiled pipe.

The circulating liquid inlet is positioned above the slurry box, and the circulating liquid outlet is positioned below the slurry box.

The liquid injection port is positioned on the top surface of the slurry box, and the liquid discharge port is positioned on the bottom surface of the slurry box.

The circulating liquid inlet and the circulating liquid outlet are positioned on the left part of the slurry box, and the liquid injection port and the liquid discharge port are positioned on the right part of the slurry box.

The feed inlet is located the intermediate position on feed bin upper portion.

The feed back mouth has two, and two feed back mouths are left feed back mouth and right feed back mouth respectively.

And the left feed back port and the right feed back port are respectively positioned at the left end and the right end of the lower part of the storage bin.

The section of the storage bin is trapezoidal.

The invention has the beneficial effects that: when the base film coating device is used, heat-conducting liquid is injected into the slurry box through the liquid injection port, heat-conducting medium is introduced into the circulating liquid pipeline, the heat of the heat-conducting medium in the circulating liquid pipeline is used for heating the heat-conducting liquid in the slurry box, and the heat is transferred to the slurry in the feeding bin through the slurry box by the heat-conducting liquid, so that the temperature of the slurry is increased, the viscosity of the slurry is reduced, and the uniform coating of the slurry on the base film is ensured. The slurry enters the stock bin from the feed inlet, the upper scraper and the lower scraper are used for coating the slurry on the base film, and the redundant slurry is discharged from the feed back port and recycled. The diaphragm coating temperature control material box device can improve the temperature of slurry in a material box, reduce the viscosity of the slurry, effectively reduce the defect of missing coating of the slurry on a base film, and improve the integrity of a coating, thereby improving the safety performance of a battery.

Drawings

FIG. 1 is a diagram of the use state of a diaphragm coating temperature control box device according to one embodiment of the invention;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is a perspective view of FIG. 1;

FIG. 4 is a schematic structural view of the slurry cartridge of FIG. 1;

FIG. 5 is a perspective view of the slurry cartridge of FIG. 4.

In the figure: 1-slurry box, 2-gravure roller, 3-feed inlet, 4-feed back port, 5-circulating liquid pipeline, 6-liquid injection port, 7-liquid discharge port, 8-circulating liquid inlet, 9-circulating liquid outlet, 10-upper tabletting, 11-upper tabletting screw, 12-upper scraper, 13-lower scraper, 14-lower tabletting screw, 15-lower tabletting and 16-bin.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments.

The structure of the diaphragm coating temperature control material box device of the embodiment of the invention is shown in fig. 1 to 5, the diaphragm coating temperature control material box device of the embodiment comprises a slurry material box 1, one side of the slurry material box 1 is provided with an inwards concave bin 16, the bin 16 extends along the left-right direction, and the section of the bin 16 is trapezoidal. An upper scraper 12 and a lower scraper 13 are respectively arranged on the upper side and the lower side of the bin 16, the upper scraper 12 is clamped between the upper pressing sheet 10 and the upper side of the bin through an upper pressing sheet screw 11, and the lower scraper 13 is clamped between the lower pressing sheet 15 and the lower side of the bin through a lower pressing sheet screw 14.

Slurry box 1 is inside to have the cavity, is equipped with circulation liquid pipeline 5 in the cavity, and circulation liquid pipeline 5's one end is circulation liquid entry 8, the other end and is circulated liquid export 9, and circulation liquid entry 8 and circulation liquid export 9 are all worn out from slurry box 1, slurry box 1 is last to be equipped with to the interior notes liquid mouth 6 of pouring into liquid of cavity and with cavity interior liquid discharge's leakage fluid dram 7, is equipped with feed inlet 3 and feed back mouth 4 on the feed bin 1, feed inlet 3 is located 16 upper portions of feed bin and upwards extends and wears out from slurry box 1 top, feed back mouth 4 is located 16 lower parts of feed bin and downwardly extending and wears out from slurry box 1 below.

The circulating liquid pipeline 5 is a coiled pipe, the circulating liquid inlet 8 is positioned above the slurry box 1, and the circulating liquid outlet 9 is positioned below the slurry box 1. The liquid injection port 6 is positioned on the top surface of the slurry box 1, and the liquid discharge port 7 is positioned on the bottom surface of the slurry box 1. The circulating liquid inlet 8 and the circulating liquid outlet 9 are positioned on the left part of the slurry box 1, and the liquid injection port 6 and the liquid discharge port 7 are positioned on the right part of the slurry box 1.

The feed inlet 3 is positioned in the middle of the upper part of the storage bin 16. The feed back mouth 4 has two, and two feed back mouths 4 are left feed back mouth and right feed back mouth respectively, left side feed back mouth and right feed back mouth are located both ends position department about 16 lower parts of feed bin respectively.

When the diaphragm coating temperature control magazine device of the embodiment is used, the gravure roller 2 is aligned with the bin 16 on the slurry magazine 1, and the upper scraper 12 and the lower scraper 13 are used for coating the slurry on the base film of the gravure roller 2. The thick liquids get into feed bin 16 by feed inlet 3, through annotating liquid mouth 6 and injecting heat conduction liquid into thick liquids box 1, let in heat conduction medium in to circulation liquid pipeline 5, utilize heat conduction medium's in the circulation liquid pipeline 5 heat conduction liquid in the thick liquids box 1, heat conduction liquid passes through thick liquids box and gives the thick liquids in feed bin 16 with heat transfer for thereby thick liquids heat up and reduce the viscosity of thick liquids, guarantee that the thick liquids coats evenly on the base film.

The temperature of the heat-conducting medium entering the circulating liquid pipeline can be controlled by an external mold temperature controller. The temperature of the pulp box is controlled to indirectly increase the temperature of the coating pulp coated on the base film, reduce the viscosity of the pulp, ensure that the pulp is better contacted with the surface of the base film, and the number of the defects detected by a defect detecting instrument is lower. The same slurry is used for production, only the temperature of the material box is regulated, other parameters are not changed, the produced diaphragm is subjected to coating test, the diaphragm with the length of 1000 meters is taken as a sample, the diaphragm is detected by a defect detector, and the result is shown in the following table:

	temperature of	Viscosity (mpas)	Number of defects (number/1000 m)
				1	15℃	83	33
2	20℃	71	19
				3	25℃	64	11
4	30℃	58	5
				5	35℃	46	2
6	40℃	42	7
				7	50℃	30	16
8	60℃	22	24

As can be seen from the above table, the slurry box temperature is in the range of 30-40 ℃, the number of defects of the separator is less, and the uniformity of coating is better.

The above-described embodiment is a preferred embodiment of the present invention, and the above-described embodiment and description are only illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the present invention, and these changes and modifications are within the scope of the present invention as claimed.