CN210229639U - Composite filter for producing lithium ion battery electrolyte - Google Patents
Composite filter for producing lithium ion battery electrolyte Download PDFInfo
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- CN210229639U CN210229639U CN201920759745.4U CN201920759745U CN210229639U CN 210229639 U CN210229639 U CN 210229639U CN 201920759745 U CN201920759745 U CN 201920759745U CN 210229639 U CN210229639 U CN 210229639U
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Abstract
The utility model relates to a composite filter for producing lithium ion battery electrolyte, which comprises a shell, a magnetic substance filtering unit and a solid impurity filtering unit; the shell comprises a wall, an upper cover plate, a lower cover plate and a lower end enclosure, wherein the upper cover plate and the lower cover plate are respectively fixedly installed at the upper end and the lower end of the wall through screws to form a filter inner cavity; the magnetic substance filtering unit comprises a plurality of magnetic rods, and the magnetic rods are fixedly arranged on the upper cover plate and extend into the upper chamber; the solid impurity filtering unit comprises a plurality of folding filter cores, and the folding filter cores correspond to each other and are arranged on the liquid flow hole. Can simultaneously filter solid insoluble substances and magnetic metal impurities in the lithium ion battery electrolyte.
Description
Technical Field
The utility model relates to a lithium ion battery electrolyte production technical field especially relates to a composite filter for lithium ion battery electrolyte production.
Background
The lithium ion battery has higher volumetric specific energy, gravimetric specific energy and good environmental protection, gradually replaces the traditional lead-acid battery, nickel-cadmium battery and nickel-hydrogen battery, is widely used in portable 3C electronic equipment such as mobile phones, notebook computers and the like, rapidly occupies a large market and develops rapidly. In recent years, lithium ion batteries are gradually popularized in the fields of electric automobiles and energy storage, and the wide application of the lithium ion batteries can relieve increasingly tense petroleum resources, so the lithium ion batteries have high international economic strategic significance.
The lithium ion battery mainly comprises positive and negative pole pieces, a diaphragm, electrolyte and a battery shell. Among them, the electrolyte, which is "blood" of a lithium ion battery, has a great influence on the performance of the battery. The excellent electrolyte can effectively assist the performance exertion of the anode and cathode active materials of the battery and improve the electrochemical performance of the whole lithium ion battery.
The lithium ion battery is strictly required to be manufactured in a totally-enclosed dust-free workshop, and when the electrolyte contains impurities such as solid insoluble substances, scrap iron and the like, battery self-discharge is formed due to micro short circuit, so that the performance of the battery is reduced and the service life of the battery is shortened; if so, the impurities pierce the separator, thereby causing thermal runaway of the battery and safety accidents such as battery explosion. Therefore, it is important to control the content of insoluble solids and metal impurities such as iron in the electrolyte to improve the quality of the electrolyte.
Many links can cause the entering of solid insoluble substances and metal impurities in the production process of the lithium ion battery electrolyte. First, the lithium ion battery electrolyte generally consists of an organic solvent, a lithium salt and an additive, and these raw materials are generally prepared in a metal container such as a reaction kettle, and inevitably contain insoluble solid impurities such as insoluble substances and metal impurities such as iron, and especially, the lithium salt and part of the solid additives have higher insoluble substances. Secondly, in the production process of the electrolyte, a large amount of solid impurities are easily generated due to the pulverization of the molecular sieve caused by long-term use when the molecular sieve is used for purifying the solvent. In addition, because the electrolyte of the lithium ion battery has stronger corrosivity, although production equipment such as a blending kettle and the like and pipelines are made of stainless steel materials, a small amount of metals such as iron, nickel and the like can still enter the electrolyte. In conclusion, these factors lead to an increase in the content of insoluble solids and metal impurities in the electrolyte.
At present, the method commonly adopted by electrolyte enterprises is that a filter is arranged to filter solid impurities generated by crushing a molecular sieve after a solvent is purified in the production process, and a filter is arranged to filter insoluble impurities introduced due to addition of lithium salt and an additive after blending again before the finished electrolyte product is filled.
Disclosure of Invention
The utility model aims at providing a can filter the composite filter of solid undissolved substance and magnetic metal impurity in the lithium ion battery electrolyte simultaneously to prior art's not enough.
The technical scheme of the utility model:
a composite filter for producing lithium ion battery electrolyte comprises a shell, a magnetic substance filtering unit and a solid impurity filtering unit; the shell comprises a wall, an upper cover plate, a lower cover plate and a lower sealing head, wherein the upper cover plate and the lower cover plate are fixedly arranged at the upper end and the lower end of the wall respectively through screws to form a filter inner cavity; the magnetic substance filtering unit comprises a plurality of magnetic rods, and the magnetic rods are fixedly arranged on the upper cover plate and extend into the upper chamber; the solid impurity filtering unit comprises a plurality of folding filter cores, and the folding filter cores correspond to each other and are arranged on the liquid flow hole.
The lithium ion battery electrolyte enters the upper chamber through the material inlet pipe, contacts with a magnetic rod extending into the upper chamber, and adsorbs the removed magnetic metal impurities under the magnetic force action of the magnetic rod; then the mixture flows into the lower cavity through the communicating pipeline, and solid insoluble substances are filtered and removed by the folding filter element; finally, the mixture flows into the lower end enclosure through the liquid flow hole and flows out through the material outlet pipe; and (4) filtering solid insoluble substances and magnetic metal impurities in the material.
The technical scheme is further improved and refined, and the communication pipeline is communicated with the upper part of the upper chamber; the material is enabled to enter the upper chamber and fully contact with the magnetic rod, and the magnetic metal impurities are more thorough.
The technical scheme is further improved and refined, the diameter of the magnetic rod is more than or equal to 1 inch, and the magnetic rod is made of neodymium iron boron magnetic steel, aluminum nickel cobalt magnetic steel or samarium cobalt magnetic steel; so as to efficiently adsorb magnetic impurities such as iron, nickel and the like in the material.
The technical scheme is further improved and refined, the material of a filter membrane of the folding filter element is polypropylene, polytetrafluoroethylene or polyvinylidene fluoride, and the precision of the filter membrane is not more than 0.45 mu m; so as to filter off fine solid insolubles.
The technical scheme is further improved and refined, the wall, the upper cover plate, the lower seal head and the partition plate are all made of 304 or 316 stainless steel, and fluoroplastic linings are respectively arranged on the wall, the upper cover plate, the lower seal head and the partition plate; so as to prevent the pollution of the metal impurities such as iron and nickel and the like generated by the filter to the materials.
The technical scheme is further improved and refined, the upper cover plate is provided with a handle, the upper cover plate is convenient to open, and the lower end enclosure is provided with support legs.
The utility model has the advantages that the design is reasonable, the structure is simple, the common solid impurity filtering unit and the magnetic substance filtering unit are skillfully combined in a single device, the magnetic substances such as iron, nickel and the like are obviously reduced while the solid impurities in the electrolyte are removed, the post-treatment of the purified solvent is suitable, the post-treatment can be applied to the filtering process before the electrolyte is filled, and the quality of the electrolyte product can be effectively improved; meanwhile, the investment can be saved, and the occupied space is reduced.
Drawings
Fig. 1 is a schematic diagram of a composite filter structure for use in the production of lithium ion battery electrolyte.
In the figure, the wall 1 of the device, a lower seal head 2, a supporting leg 3, an upper cover plate 4, a handle 5, a magnetic rod 6, a material inlet pipe 7, a communicating pipeline 8, a material outlet pipe 9, a folding filter element 10, a lower cover plate 11, a screw 12, a partition plate 13 and a liquid flow hole 14.
Detailed Description
As shown in the figure, the composite filter for producing the lithium ion battery electrolyte comprises a shell, a magnetic substance filtering unit and a solid impurity filtering unit; the shell comprises a wall 1, an upper cover plate 4, a lower cover plate 11 and a lower end enclosure 2, wherein the upper cover plate 4 and the lower cover plate 11 are fixedly installed at the upper end and the lower end of the wall 1 respectively through screws to form a filter inner cavity, a partition plate 13 is arranged in the wall 1 and divides the filter inner cavity into an upper cavity and a lower cavity through the partition plate 13, a material inlet pipe 7 is arranged on the wall 1, the material inlet pipe 7 is communicated with the upper cavity, a communicating pipeline 8 is arranged on the wall 1, one end of the communicating pipeline 8 is communicated with the upper cavity, the other end of the communicating pipeline is communicated with the lower cavity, the lower end enclosure 2 is arranged at the lower end of the wall 1 and covers the lower cover plate 11, a plurality of liquid flow holes 14 are arranged in the lower cover plate 11 and are communicated with the lower cavity and the interior of the lower; the magnetic substance filtering unit comprises a plurality of magnetic rods 6, and the magnetic rods 6 are fixedly arranged on the upper cover plate 4 and extend into the upper chamber; the solid impurity filtering unit comprises a plurality of folding filter elements 10, and the folding filter elements 10 are in one-to-one correspondence and are arranged on the liquid flow holes 14; the communicating pipeline 8 is communicated with the upper part of the upper chamber; the material enters the upper chamber and is fully contacted with the magnetic bar 6, so that the magnetic metal impurities are more thorough; the diameter of the magnetic rod 6 is more than or equal to 1 inch, and the magnetic rod 6 is made of neodymium iron boron magnetic steel, aluminum nickel cobalt magnetic steel or samarium cobalt magnetic steel; so as to efficiently adsorb magnetic impurities such as iron, nickel and the like in the material; the material of the filter membrane of the folding filter element 10 is polypropylene, polytetrafluoroethylene or polyvinylidene fluoride, and the precision of the filter membrane is not more than 0.45 μm; so as to filter out tiny solid insoluble substances; the wall 1, the upper cover plate 4, the lower cover plate 11, the lower seal head 2 and the partition plate 13 are all made of 304 or 316 stainless steel, and fluoroplastic linings are respectively arranged on the wall 1, the upper cover plate 4, the lower cover plate 11, the lower seal head 2 and the partition plate 13; so as to prevent the pollution of the metal impurities such as iron, nickel and the like generated by the filter to the materials; the upper cover plate 4 is provided with a handle 5, so that the upper cover plate 4 can be opened conveniently, and the lower seal head 2 is provided with supporting legs.
The above disclosure is only for the preferred embodiment of the present invention, but not intended to limit itself, and any changes and modifications made by those skilled in the art without departing from the spirit of the present invention shall fall within the protection scope of the present invention.
Claims (6)
1. The composite filter for producing the lithium ion battery electrolyte is characterized by comprising a shell, a magnetic substance filtering unit and a solid impurity filtering unit; the shell comprises a wall, an upper cover plate, a lower cover plate and a lower sealing head, wherein the upper cover plate and the lower cover plate are fixedly arranged at the upper end and the lower end of the wall respectively through screws to form a filter inner cavity; the magnetic substance filtering unit comprises a plurality of magnetic rods, and the magnetic rods are fixedly arranged on the upper cover plate and extend into the upper chamber; the solid impurity filtering unit comprises a plurality of folding filter cores, and the folding filter cores correspond to each other and are arranged on the liquid flow hole.
2. The composite filter for lithium ion battery electrolyte production according to claim 1, wherein the communication pipeline is communicated with the upper part of the upper chamber.
3. The composite filter for producing lithium ion battery electrolyte of claim 1, wherein the diameter of the magnetic rod is greater than or equal to 1 inch, and the magnetic rod is made of neodymium iron boron magnetic steel, aluminum nickel cobalt magnetic steel or samarium cobalt magnetic steel.
4. The composite filter for producing lithium ion battery electrolyte of claim 1, wherein the filter membrane of the folded filter element is made of polypropylene, polytetrafluoroethylene or polyvinylidene fluoride, and the precision of the filter membrane is not more than 0.45 μm.
5. The composite filter for producing lithium ion battery electrolyte according to claim 1, wherein the material of the vessel wall, the upper cover plate, the lower head, and the separator is 304 or 316 stainless steel, and fluoroplastic linings are respectively disposed thereon.
6. The composite filter for producing lithium ion battery electrolyte of claim 1, wherein the upper cover plate is provided with a handle, and the lower end socket is provided with a support leg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920759745.4U CN210229639U (en) | 2019-05-24 | 2019-05-24 | Composite filter for producing lithium ion battery electrolyte |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920759745.4U CN210229639U (en) | 2019-05-24 | 2019-05-24 | Composite filter for producing lithium ion battery electrolyte |
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| Publication Number | Publication Date |
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| CN210229639U true CN210229639U (en) | 2020-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920759745.4U Active CN210229639U (en) | 2019-05-24 | 2019-05-24 | Composite filter for producing lithium ion battery electrolyte |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117960375A (en) * | 2024-03-29 | 2024-05-03 | 亿凯(江苏)机械科技有限公司 | Magnetic filter for removing iron slag in electrolyte |
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2019
- 2019-05-24 CN CN201920759745.4U patent/CN210229639U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117960375A (en) * | 2024-03-29 | 2024-05-03 | 亿凯(江苏)机械科技有限公司 | Magnetic filter for removing iron slag in electrolyte |
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