CN104701484A - Lithium ion battery electrolyte injecting device and method thereof - Google Patents

Lithium ion battery electrolyte injecting device and method thereof Download PDF

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Publication number
CN104701484A
CN104701484A CN201510056184.8A CN201510056184A CN104701484A CN 104701484 A CN104701484 A CN 104701484A CN 201510056184 A CN201510056184 A CN 201510056184A CN 104701484 A CN104701484 A CN 104701484A
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China
Prior art keywords
pipeline
fluid injection
ion battery
lithium
valve
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Pending
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CN201510056184.8A
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Chinese (zh)
Inventor
宗煜钦
张玉清
张强盛
徐恒祥
王运霞
肖波
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Individual
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Individual
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Priority to CN201510056184.8A priority Critical patent/CN104701484A/en
Publication of CN104701484A publication Critical patent/CN104701484A/en
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/60Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The invention discloses a lithium ion battery electrolyte injecting device and a method thereof. The lithium ion battery electrolyte injecting device comprises a pipeline part, wherein the pipeline part comprises an airflow pipeline, an electrolyte injecting pipeline and a connection pipeline; the airflow pipeline, the electrolyte injecting pipeline and the connection pipeline are crossed and communicated with one another; a first valve is arranged on the airflow pipeline; a second valve is arranged on the electrolyte injecting pipeline. By virtue of the lithium ion battery electrolyte injecting device, the quality and the property of the electrolyte in the battery can be greatly improved; the comprehensive electrochemical properties of the battery are effectively ensured and improved.

Description

A kind of lithium-ion battery liquid injection device and method
Technical field
The present invention relates to lithium ion battery production technical field, particularly relates to a kind of device and method of fluid injection of high capacity lithium ion battery.
Background technology
It is high that lithium ion battery has energy density, average output voltage is high, and power output is large, and self discharge is little, memory-less effect, many advantages such as cycle performance is superior, pollution-free, are widely used in pure electric automobile at present, wind-light complementary energy storage power station, mobile communication base station, the numerous areas such as aviation and military affairs, have good economic benefit, social benefit and strategic importance.Therefore we have higher requirement to lithium ion battery, not only will reduce costs, and also will improve the various electrical properties of battery.This just requires that we not only will make a breakthrough in material property improvement, and the most effectively improves the production efficiency manufacturing battery, optimizes the production technology manufacturing battery.
Electrolyte is the important component part of lithium ion battery, is the carrier of ion transfer between both positive and negative polarity.In the production process of lithium ion battery, fluid injection is a very important operation, and it, mainly to the battery core of having dried completely, carries out filling electrolyte by liquid injection hole to it.Traditional fluid injection mode, that electrolyte is stored in high-pressure container, again by electrolyte by tubes connection to some priming device (comprising automatic filling machine), annotated stage by stage among battery core by electrolyte by these priming devices, each stage needs the static a very long time again.
But above-mentioned electrolyte filling method has following shortcoming: 1, owing to having air in battery core, can not be absorbed by battery core very soon after electrolyte is injected into battery core, and electrolyte flowing velocity and seepage velocity in battery core is very slow; What is more, as fluid injection speed is too fast, will after fluid injection, and electrolyte ejection battery core is outside, causes wastage of material on the one hand, works the mischief on the other hand to the safety of operative employee.Therefore this just requires to carry out slow fluid injection (especially high capacity lithium ion battery) stage by stage, namely annotate after a certain amount of electrolyte, by static for the battery core a very long time, and then annotate, repeatedly several times after electrolyte could be annotated completely inner to battery core, this just causes fluid injection operation consuming time very long, reduces production efficiency.2, because battery core inside has large quantity of air to exist, electrolyte is annotated into battery core and can be contacted with air, in addition there is complicated chemical reaction in static some compositions in electrolyte and air and the impurity of may causing for a long time, affect electrolyte quality and performance, thus affect the various chemical properties of battery core.
Summary of the invention
The object of this part is some aspects of general introduction embodiments of the invention and briefly introduces some better embodiment.May do in the specification digest and denomination of invention of this part and the application a little simplify or omit with avoid making this part, specification digest and denomination of invention object fuzzy, and this simplification or omit and can not be used for limiting the scope of the invention.
In view of Problems existing in above-mentioned and/or existing lithium-ion battery liquid injection device and electrolyte filling method, propose the present invention.
Therefore, an object of the present invention is to provide a kind of lithium-ion battery liquid injection device, electrolyte can be annotated to battery core by fast, increases work efficiency, and improves the fail safe of operation.
For solving the problems of the technologies described above, according to an aspect of the present invention, the invention provides following technical scheme: a kind of lithium-ion battery liquid injection device, it comprises pipeline component, described pipeline component comprises airflow pipeline, fluid injection pipeline and is connected pipeline, described airflow pipeline, fluid injection pipeline and linking pipeline intersect and are connected, and described airflow pipeline is provided with the first valve, described fluid injection pipeline is provided with the second valve.
As a kind of preferred version of lithium-ion battery liquid injection device of the present invention, wherein: also comprise, vacuumizing part, described vacuumizing part is connected with one end of described airflow pipeline.
As a kind of preferred version of lithium-ion battery liquid injection device of the present invention, wherein: also comprise, fluid injection parts, described fluid injection parts are connected with one end of described fluid injection pipeline.
As a kind of preferred version of lithium-ion battery liquid injection device of the present invention, wherein: also comprise, seal member, described seal member is connected with described linking pipeline.
As a kind of preferred version of lithium-ion battery liquid injection device of the present invention, wherein: the material that described seal member adopts is ethylene propylene diene rubber.
As a kind of preferred version of lithium-ion battery liquid injection device of the present invention, wherein: described airflow pipeline, fluid injection pipeline and linking pipeline intersect and be connected, and are be connected by threeway thus be connected.
Another object of the present invention is to provide a kind of method utilizing lithium-ion battery liquid injection device to carry out fluid injection, it effectively can avoid the contact of electrolyte and air, fundamentally ensure that electrolyte enters the quality after battery core and performance, thus ensure that the various chemical properties of finished product battery core.
For solving the problems of the technologies described above, according to an aspect of the present invention, the invention provides following technical scheme: a kind of method utilizing lithium-ion battery liquid injection device to carry out fluid injection, it comprises, close the second valve, open the first valve connected on the airflow pipeline of vacuumizing part side, battery core is vacuumized to the step making described battery core inside reach negative pressure; And, close the first valve connected on the airflow pipeline of vacuumizing part side, open the second valve on fluid injection parts side fluid injection pipeline, described battery core is carried out to the step of fluid injection.
As a kind of preferred version utilizing lithium-ion battery liquid injection device to carry out the method for fluid injection of the present invention, wherein: at closedown second valve, open the first valve connected on the airflow pipeline of vacuumizing part side, to battery core vacuumize make described battery core inside reach the step of negative pressure before, also comprise, by the step that the liquid injection hole of described seal member and described battery core is connected and sealed.
Beneficial effect of the present invention:
(1) first battery core is vacuumized before fluid injection owing to adopting, ensure that battery core internal pressure is negative value, therefore in injection process, it is inner that electrolyte can inject battery core by original priming device rapidly in a large number, do not need the technique carrying out wanting segmentation fluid injection segmentation static, improve the production efficiency of fluid injection operation greatly;
(2) electrolyte also by liquid injection hole splash out, can not cause raw-material waste;
(3) safety of operating personnel is ensured;
(4) because battery core inside before fluid injection and in fluid injection is evacuated, electrolyte just avoids after entering battery core and large quantity of air Long contact time, thus avoid the chemical reaction that battery core electrolyte inside and air produce various complexity, ensure that quality and the performance of electrolyte, ensure further and improve the various chemical properties of battery core.
Accompanying drawing explanation
Fig. 1 is the using state of lithium-ion battery liquid injection device described in one embodiment of the invention schematic diagram.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, are described in detail below by the specific embodiment of the present invention.
Set forth a lot of detail in the following description so that fully understand the present invention, but the present invention can also adopt other to be different from alternate manner described here to implement, those skilled in the art can when without prejudice to doing similar popularization when intension of the present invention, therefore the present invention is by the restriction of following public specific embodiment.
Adopt the lithium-ion battery liquid injection device of technical scheme provided by the present invention as shown in Figure 1, it comprises vacuumizing part 3, pipeline component and fluid injection parts 8, pipeline component includes airflow pipeline 1, fluid injection pipeline 6 and is connected pipeline, airflow pipeline 1, fluid injection pipeline 6 and linking pipeline intersect and are connected, airflow pipeline 1 is provided with the first valve 2, fluid injection pipeline 6 is provided with the second valve 7.Vacuumizing part 3 is connected with one end of airflow pipeline 1, and fluid injection parts 8 are connected with one end of fluid injection pipeline 6.
In one embodiment, lithium-ion battery liquid injection device also comprises, seal member 5, and it is connected with linking pipeline.In order to better realize sealing corrosion-resistant function, the material that seal member 5 adopts is ethylene propylene diene rubber.
And airflow pipeline 1, fluid injection pipeline 6 and linking pipeline intersection are connected, be connected by threeway 4 thus be connected.
Airflow pipeline 1 is connected to vacuumizing part 3 side, first valve 2 controls to vacuumize battery core 10, fluid injection pipeline 6 is connected to fluid injection parts 8, second valve 7 controls fluid injection parts 8 pairs of battery cores 10 and carries out fluid injection, liquid injection hole 9 is isolated from the outside and seals by seal member 5, and airflow pipeline 1, fluid injection pipeline 6 and linking pipeline are connected by threeway 4.
Concrete, before fluid injection, close the second valve 7 connecting fluid injection parts 8, seal member 5 and battery core liquid injection hole 9 are connected and sealed, open the first valve 2 connecting vacuumizing part 3 side, vacuumize battery core 10, in battery core 10, air is drawn out of; After the time vacuumized battery core 10 and internal vacuum (internal pressure) meet technological requirement, close the first valve 2 connecting and vacuumize side, open the second valve 7 connecting fluid injection parts 8 side, start to carry out fluid injection to battery core 10.
Because now battery core 10 inside is negative pressure state, fluid injection parts 8 side is malleation, electrolyte can be made to rapidly flow toward in battery core 10, and absorbed fast by battery core 10 by the effect of pressure differential; When after the reservoir quantity reaching technological requirement, close and connect fluid injection parts 8 side second valve 7, complete fluid injection work.
It should be noted that, in this device, all annexes are acid-alkali-corrosive-resisting material, and especially seal member 5 is ethylene propylene diene rubber.
To sum up, adopt the inventive method to provide technical scheme to vacuumize servicing unit and have following advantage:
1, structure is simple, easy to make;
2, fluid injection production efficiency can effectively be improved;
3, can effectively prevent from working the mischief to operating personnel in injection process;
4, avoid the waste of electrolyte, provide cost savings;
5, substantially increase the quality of electrolyte in battery core and performance, effectively ensure and improve the comprehensive electrochemical of battery core.
It should be noted that, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.

Claims (8)

1. a lithium-ion battery liquid injection device, is characterized in that: comprise pipeline component, and described pipeline component comprises airflow pipeline, fluid injection pipeline and is connected pipeline,
Described airflow pipeline, fluid injection pipeline and linking pipeline intersect and are connected, and described airflow pipeline is provided with the first valve, described fluid injection pipeline is provided with the second valve.
2. lithium-ion battery liquid injection device as claimed in claim 1, it is characterized in that: also comprise, vacuumizing part, described vacuumizing part is connected with one end of described airflow pipeline.
3. lithium-ion battery liquid injection device as claimed in claim 1 or 2, it is characterized in that: also comprise, fluid injection parts, described fluid injection parts are connected with one end of described fluid injection pipeline.
4. lithium-ion battery liquid injection device as claimed in claim 3, it is characterized in that: also comprise, seal member, described seal member is connected with described linking pipeline.
5. lithium-ion battery liquid injection device as claimed in claim 4, is characterized in that: the material that described seal member adopts is ethylene propylene diene rubber.
6. lithium-ion battery liquid injection device as claimed in claim 5, is characterized in that: described airflow pipeline, fluid injection pipeline and linking pipeline intersect and be connected, and are be connected by threeway thus be connected.
7. utilize the lithium-ion battery liquid injection device as described in claim 4 ~ 6 to carry out a method for fluid injection, it is characterized in that: comprise,
Close the second valve, open the first valve connected on the airflow pipeline of vacuumizing part side, battery core is vacuumized to the step making described battery core inside reach negative pressure; And,
Close the first valve connected on the airflow pipeline of vacuumizing part side, open the second valve on fluid injection parts side fluid injection pipeline, described battery core is carried out to the step of fluid injection.
8. lithium-ion battery liquid injection device as claimed in claim 7, it is characterized in that: at closedown second valve, open the first valve connected on vacuumizing part side airflow pipeline, before battery core is vacuumized and makes described battery core inside reach the step of negative pressure, also comprise
By the step that the liquid injection hole of described seal member and described battery core is connected and sealed.
CN201510056184.8A 2015-02-03 2015-02-03 Lithium ion battery electrolyte injecting device and method thereof Pending CN104701484A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107359299A (en) * 2016-05-10 2017-11-17 宁德时代新能源科技股份有限公司 Gas production extraction device
CN108511820A (en) * 2018-03-30 2018-09-07 努比亚技术有限公司 Delay device, method and the electronic equipment of battery cycle life
CN111945497A (en) * 2020-06-22 2020-11-17 中南大学 Concrete structure pore filling operation device and method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2752970Y (en) * 2004-12-03 2006-01-18 中国电子科技集团公司第十八研究所 Large capacity lithium ion battery liquid filling device
CN102509773A (en) * 2011-12-18 2012-06-20 奇瑞汽车股份有限公司 Battery vacuum liquid injection tool
CN202651261U (en) * 2012-07-16 2013-01-02 宁波世捷新能源科技有限公司 Liquid filling device of high-capacity lithium ion battery
CN204407409U (en) * 2015-02-03 2015-06-17 张玉清 A kind of lithium-ion battery liquid injection device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2752970Y (en) * 2004-12-03 2006-01-18 中国电子科技集团公司第十八研究所 Large capacity lithium ion battery liquid filling device
CN102509773A (en) * 2011-12-18 2012-06-20 奇瑞汽车股份有限公司 Battery vacuum liquid injection tool
CN202651261U (en) * 2012-07-16 2013-01-02 宁波世捷新能源科技有限公司 Liquid filling device of high-capacity lithium ion battery
CN204407409U (en) * 2015-02-03 2015-06-17 张玉清 A kind of lithium-ion battery liquid injection device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107359299A (en) * 2016-05-10 2017-11-17 宁德时代新能源科技股份有限公司 Gas production extraction device
CN108511820A (en) * 2018-03-30 2018-09-07 努比亚技术有限公司 Delay device, method and the electronic equipment of battery cycle life
CN111945497A (en) * 2020-06-22 2020-11-17 中南大学 Concrete structure pore filling operation device and method

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Application publication date: 20150610

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