CN203425559U

CN203425559U - Molecular sieve column for dewatering solvent for battery electrolyte

Info

Publication number: CN203425559U
Application number: CN201320505132.0U
Authority: CN
Inventors: 丁祥欢
Original assignee: Dongguan Shanshan Battery Materials Co Ltd
Current assignee: Dongguan Shanshan Battery Materials Co Ltd
Priority date: 2013-08-19
Filing date: 2013-08-19
Publication date: 2014-02-12
Anticipated expiration: 2023-08-19

Abstract

The utility model relates to the technical field of production of battery electrolytes, and particularly relates to a molecular sieve column for dewatering a solvent for a battery electrolyte. The molecular sieve column comprises a column body, wherein an upper sieve plate, a lower sieve plate and a heat radiator are arranged inside the column body, the heat radiator is provided with a hollow heat radiating channel, and the heat radiating channel is communicated with the outside of the column body. The heat radiating channel is arranged inside the column, thus the molecular sieve column is capable of radiating heat through the column wall, and also rapidly radiating heat through the heat radiating channel, thereby facilitating that the heat generated in a solvent dewatering process is rapidly radiated, preventing the decomposition caused by absorbing heat by the solvent for the battery electrolyte, and ensuring the purity of the solvent for the battery electrolyte. The problem that the heat radiating area of an existing molecular sieve column is limited to the column wall is solved, and a large molecular sieve column with larger diameter and longer length can be made, thus the molecular sieve column is suitable for large-scale industrialized production, and is favorable to increase of production efficiency and reduction of cost.

Description

A kind of molecular sieve column of using solvent dehydration for battery electrolyte

Technical field

The utility model relates to battery electrolyte production technical field, relates in particular to a kind of molecular sieve column of using solvent dehydration for battery electrolyte.

Background technology

It is little that lithium ion battery has volume, storage electric weight is large, the advantage such as be easy to carry, obtained in recent years development fast, battery electrolyte is one of important component part of such battery, because battery electrolyte is very responsive to moisture, the moisture that enters battery electrolyte can cause serious impact to the quality of battery electrolyte, for the lithium ion battery that guarantees to make has good performance, in the process of producing, must strictly control the moisture in battery electrolyte, conventional method is to utilize molecular sieve column to dewatering for preparing the solvent of battery electrolyte at present.

The solvent of the most frequently used lithium-ion battery electrolytes is carbonates solvent, dimethyl carbonate (DMC) for example, diethyl carbonate (DEC), methyl ethyl carbonate (EMC), ethylene carbonate (EC) and propene carbonate (PC), methyl propyl carbonate (MPC), ethyl propyl carbonic acid ester (EPC) etc., these carbonates solvents are as sour in existence under given conditions, in the situation of alkali or other catalyst, can there is ester exchange reaction, be between same molecule, to intercourse the reaction of alkoxyl, such ester exchange reaction is for the carbonic ester (i.e. two carbonic esters that alkoxyl is identical) such as symmetries such as DMC, between their molecule, carry out ester exchange reaction and can not produce new compound, still obtain DMC, can not bring problem, but if asymmetric carbonic ester, for example two molecule EMC intercourse methoxy or ethoxy, two molecule EMC disappear, a part DMC and a part DEC that generate, EMC its purity after there is ester exchange reaction will decline like this.

Those skilled in the art are known, utilize molecular sieve column battery electrolyte to be carried out to the process meeting release heat of dehydrating operations with solvent, after solvent absorption heat, can cause the fast rise of temperature, further through overtesting, find, temperature in dehydration is controlled the purity of carbonates solvent is changed and has impact greatly, when using, diameter is less, when the elongated molecular sieve column of structure carries out dehydrating operations to carbonates solvent, because the heat in elongated molecular sieve column can distribute by post jamb faster, the temperature of the solvent in molecular sieve column raises not obvious, be conducive to control the speed of above-mentioned ester exchange reaction, therefore the purity decline phenomenon of carbonates solvent is slight, and when using the larger molecular sieve column of diameter to carry out dehydrating operations to carbonates solvent, because post footpath is excessive, the centre distance post jamb of molecular sieve column is far away, length, thermal resistance are large, heat radiation is slow to cause heat dissipation path, after the solvent absorption heat of molecular sieve column inside, temperature raises obviously, the speed of ester exchange reaction is fast, and the purity decline phenomenon of solvent is obvious.

Existing molecular sieve column is merely able to dispel the heat by post jamb in the process of carrying out dehydrating operations, the purity of the carbonates solvent causing because of the rising of temperature in order the to prevent obvious phenomenon that declines, can only adopt the cylinder that diameter is less, structure is elongated, the small volume of such molecular sieve column of one side, cannot make large-scale molecular sieve column, cannot adapt to large-scale solvent dehydration operation, there is larger limitation, at such molecular sieve column of application, carry out repeatedly in the process of dehydration cycle on the other hand, its radiating effect cannot meet the requirement of production.

Summary of the invention

The purpose of this utility model is to provide for the deficiencies in the prior art the molecular sieve column with solvent dehydration for battery electrolyte that a kind of radiating efficiency is high, can prevent solvolysis.

The utility model is achieved through the following technical solutions:

A kind of molecular sieve column of using solvent dehydration for battery electrolyte, comprise cylinder, the top of described cylinder, bottom is respectively arranged with molecular sieve charge door, molecular sieve drain hole, the top of described cylinder, bottom is respectively arranged with solvent outlet, solvent inlet, described column body is also provided with upper sieve plate, lower sieve plate, described upper sieve plate is arranged between molecular sieve charge door and solvent outlet, described lower sieve plate is arranged between molecular sieve drain hole and solvent inlet, the radiator that described cylinder is also provided with, described radiator is provided with the heat dissipation channel of hollow, described heat dissipation channel is communicated with described cylinder is extraneous.

Wherein, described radiator runs through described cylinder along the axis direction of cylinder.

Preferably, in described cylinder, the distance of any point and described radiator sidewall is less than or equal to 300mm.

Wherein, the entrance of described heat dissipation channel is arranged at the bottom of described cylinder, and the outlet of described heat dissipation channel is arranged at the top of described cylinder.

Preferably, that the cross section of described heat dissipation channel is hollow is cylindric, the prism-shaped of hollow or hollow round table-like.

Wherein, the entrance of described heat dissipation channel, outlet are all arranged at one end of described cylinder, are provided with at least two heat dissipation channels that are interconnected in described radiator.

Wherein, the cross section of described radiator is the hollow square shape of sphere of movements for the elephants shape.

Wherein, the sieve diameter of described upper sieve plate, lower sieve plate is 1～4mm.

Further, described cylinder is also provided with the temperature sensor sleeve pipe for accommodating temperature sensor.

Further, the top of described cylinder also offers explosion-proof valve port.

Compared with prior art, the utlity model has following beneficial effect:

(1) of the present utility modelly for battery electrolyte, with the molecular sieve column of solvent dehydration, changed the mode that traditional molecular sieve column only utilizes post jamb to dispel the heat, inside at cylinder is provided with heat dissipation channel, not only can dispel the heat by post jamb, and can carry out quick heat radiating by heat dissipation channel, be conducive to the heat Quick diffusing producing in solvent dehydration process to be gone out, prevent the decomposing phenomenon causing with solvent absorption heat because of battery electrolyte, guaranteed the purity of battery electrolyte with solvent.

(2) problem of post jamb that is confined to the area of dissipation that the molecular sieve column of solvent dehydration has solved existing molecular sieve column for battery electrolyte of the present utility model, can make the large-scale molecular sieve column that diameter is large, length is long, be applicable to large-scale industrial production, be conducive to enhance productivity, reduce costs.

Accompanying drawing explanation

Fig. 1 is the structural representation of embodiment 1 of the present utility model.

Fig. 2 is the structural representation of embodiment 2 of the present utility model.

Reference numeral comprises:

1-cylinder; 2-molecular sieve charge door; 3-molecular sieve drain hole; 4-solvent outlet; 5-solvent inlet; 6-upper sieve plate; 7-lower sieve plate; 8-radiator; 9-entrance; 10-outlet; 11-temperature sensor sleeve pipe; 12-explosion-proof valve port.

The specific embodiment

Below in conjunction with accompanying drawing, the utility model is described in detail.

embodiment 1.

Referring to Fig. 1, a kind of molecular sieve column of using solvent dehydration for battery electrolyte, comprise cylinder 1, the top of described cylinder 1, bottom is respectively arranged with molecular sieve charge door 2, molecular sieve drain hole 3, the top of described cylinder 1, bottom is respectively arranged with solvent outlet 4, solvent inlet 5, described cylinder 1 inside is also provided with upper sieve plate 6, lower sieve plate 7, described upper sieve plate 6 is arranged between molecular sieve charge door 2 and solvent outlet 4, described lower sieve plate 7 is arranged between molecular sieve drain hole 3 and solvent inlet 5, also comprise the radiator 8 that runs through described cylinder 1, described radiator 8 is provided with the heat dissipation channel of hollow, described heat dissipation channel and described extraneous connection of cylinder 1, the utility model is provided with heat dissipation channel in the inside of cylinder 1, not only can dispel the heat by post jamb, and can carry out quick heat radiating by heat dissipation channel, be conducive to the heat Quick diffusing producing in dehydration to be gone out, prevent the decomposing phenomenon causing with solvent absorption heat because of battery electrolyte, guaranteed the purity of battery electrolyte with solvent, the area of dissipation that has solved existing molecular sieve column is confined to the problem of post jamb, can make the large-scale molecular sieve column that diameter is large, length is long, is applicable to large-scale industrial production, is conducive to enhance productivity, and reduces costs.

Wherein, described radiator 8 runs through described cylinder 1 along the axis direction of cylinder 1, can dispel the heat to the cylinder 1 of whole molecular sieve, can produce the molecular sieve column that volume is larger, length is longer, is applicable to large-scale industrial production, enhances productivity.

Preferably, the distance of the sidewall of the interior any point of described cylinder 1 and described radiator 8 is less than or equal to 300mm, guarantee that the heat in molecular sieve column can be sent to radiator 8 and transfer to the molecular sieve column external world by shorter path, can guarantee good radiating effect, the temperature of controlling molecular sieve column inside raises, prevent the decomposing phenomenon that carbonates solvent causes because temperature raises, guaranteed the purity of solvent.

Wherein, the entrance 9 of described heat dissipation channel is arranged at the bottom of described cylinder 1, the outlet 10 of described heat dissipation channel is arranged at the top of described cylinder 1, concrete, in the process of using, can provide power to pass into the cooling mediums such as mobile air or cooling water to described heat dissipation channel entrance 9 by the external world, described cooling medium passes heat dissipation channel through exporting 10 outflows, and the heat in molecular sieve column is taken away simultaneously, further improve the radiating efficiency of molecular sieve column of the present utility model, improve the quality of products.

Preferably, the cross section of described heat dissipation channel is the round table-like of the prism-shaped of cylindric, hollow of hollow or hollow, any radiator 8 with heat dissipation channel all can be realized goal of the invention of the present utility model, and be not limited to above-mentioned several types, what by the cross section of heat dissipation channel, be preferably hollow is cylindric, be convenient to production and processing, reduce production costs.

Wherein, the sieve diameter of described upper sieve plate 6, lower sieve plate 7 is 1～4mm, but described upper sieve plate 6, lower sieve plate 7 can effectively guarantee solvent and pass through to stop molecular sieve to pass through, molecular sieve is placed in the accommodation space of upper sieve plate 6, lower sieve plate 7, cylinder 1 outer wall and radiator 8 outer walls formations, and solvent to be dried flows out molecular sieve column after completing drying process process through molecular sieve.

Further, described cylinder 1 is also provided with the temperature sensor sleeve pipe 11 for accommodating temperature sensor, by monitoring in real time the temperature variations of cylinder 1 inside of molecular sieve column at cylinder 1 set temperature sensor, the temperature rise of cylinder 1 inside is controlled.

Further, the top of described cylinder 1 also offers explosion-proof valve port 12, by described explosion-proof valve port 12, connects explosion-proof valve, guarantees the safety of molecular sieve column in production process.

embodiment 2.

Referring to Fig. 2, the difference of the present embodiment and embodiment 1 is: the entrance 9 of described heat dissipation channel, export 10 one end that are all arranged at described cylinder 1, in described radiator 8, be provided with at least two heat dissipation channels that are interconnected, when passing into the cooling mediums such as forced draft, cooling water by entrance 9 in heat dissipation channel, described cooling medium is through flowing out from described outlet 10 after heat dissipation channel circulation, complete heat radiation operation, be convenient to the connection of cooling medium conveyance conduit, easy to operate.

Wherein, the cross section of described radiator 8 is the hollow square shape of sphere of movements for the elephants shape, forms double loop passage, can pass into two kinds of different cooling mediums simultaneously, further improves radiating efficiency of the present utility model, improves the accuracy of radiating effect and temperature control.

Unaccounted technical characterictic in the present embodiment, adopts the explanation in embodiment 1, at this, no longer repeats.

Finally should be noted that; above embodiment is only in order to illustrate the technical solution of the utility model; but not restriction to the utility model protection domain; although the utility model has been done to explain with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify or be equal to replacement the technical solution of the utility model, and not depart from essence and the scope of technical solutions of the utility model.

Claims

1. one kind for the molecular sieve column of solvent dehydration for battery electrolyte, comprise cylinder, the top of described cylinder, bottom is respectively arranged with molecular sieve charge door, molecular sieve drain hole, the top of described cylinder, bottom is respectively arranged with solvent outlet, solvent inlet, described column body is also provided with upper sieve plate, lower sieve plate, described upper sieve plate is arranged between molecular sieve charge door and solvent outlet, described lower sieve plate is arranged between molecular sieve drain hole and solvent inlet, it is characterized in that, the radiator that described cylinder is also provided with, described radiator is provided with the heat dissipation channel of hollow, described heat dissipation channel is communicated with described cylinder is extraneous.

2. the molecular sieve column of using solvent dehydration for battery electrolyte according to claim 1, is characterized in that, described radiator runs through described cylinder along the axis direction of cylinder.

3. the molecular sieve column of using solvent dehydration for battery electrolyte according to claim 2, is characterized in that, in described cylinder, the distance of any point and described radiator sidewall is less than or equal to 300mm.

4. the molecular sieve column of using solvent dehydration for battery electrolyte according to claim 1, is characterized in that, the entrance of described heat dissipation channel is arranged at the bottom of described cylinder, and the outlet of described heat dissipation channel is arranged at the top of described cylinder.

5. according to claim 4ly for the molecular sieve column of solvent dehydration for battery electrolyte, it is characterized in that, that the cross section of described heat dissipation channel is hollow is cylindric, the prism-shaped of hollow or hollow round table-like.

6. according to claim 1 for the molecular sieve column of solvent dehydration for battery electrolyte, it is characterized in that, the entrance of described heat dissipation channel, outlet are all arranged at one end of described cylinder, are provided with at least two heat dissipation channels that are interconnected in described radiator.

7. the molecular sieve column of using solvent dehydration for battery electrolyte according to claim 6, is characterized in that, the cross section of described radiator is the hollow square shape of sphere of movements for the elephants shape.

8. the molecular sieve column of using solvent dehydration for battery electrolyte according to claim 1, is characterized in that, the sieve diameter of described upper sieve plate, lower sieve plate is 1～4mm.

9. the molecular sieve column of using solvent dehydration for battery electrolyte according to claim 1, is characterized in that, described cylinder is also provided with the temperature sensor sleeve pipe for accommodating temperature sensor.

10. according to the molecular sieve column with solvent dehydration for battery electrolyte described in claim 1～9 any one, it is characterized in that, the top of described cylinder also offers explosion-proof valve port.