CN107799715A - A kind of fluid infusion mechanism for being used to carry out battery fluid infusion - Google Patents
A kind of fluid infusion mechanism for being used to carry out battery fluid infusion Download PDFInfo
- Publication number
- CN107799715A CN107799715A CN201710797327.XA CN201710797327A CN107799715A CN 107799715 A CN107799715 A CN 107799715A CN 201710797327 A CN201710797327 A CN 201710797327A CN 107799715 A CN107799715 A CN 107799715A
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- Prior art keywords
- lifting
- fluid infusion
- fluid injection
- liquid
- fluid
- Prior art date
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/14—Cells with non-aqueous electrolyte
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The present invention discloses a kind of fluid infusion mechanism for being used to carry out battery fluid infusion, including priming device and receipts residual liquid device.The priming device includes fluid injection cup and liquid injecting mouth, the fluid injection cup passes through soft pipe connection with the liquid injecting mouth, the priming device also includes the vacuum pumping valve that evacuated path is formed with the fluid injection cup, flexible pipe, liquid injecting mouth, and the priming device also includes being used for the lifting unit for driving the liquid injecting mouth lifting；The lower section received residual liquid device and be located at the liquid injecting mouth.A kind of fluid infusion mechanism for being used to carry out battery fluid infusion of the present invention, by setting priming device and receiving residual liquid device, and design is optimized to the structure of said apparatus, improve the effect of fluid infusion, the quality of production and production efficiency of battery are improved, reduces the production cost of battery.
Description
Technical field
The present invention relates to battery machine automated production field, more particularly to a kind of benefit for being used to carry out battery fluid infusion
Liquid mechanism.
Background technology
After battery liquid-filling, during due to vacuumizing and fluid injection cup the reason such as adhesion, cause the loss of partial electrolyte liquid, because
This, often has substantial amounts of battery to need fluid infusion in fluid injection process.At present, most of lithium battery fluid infusion is used and mended at normal temperatures
Liquid, if there being air in battery core or in the pipeline of fluid infusion, fluid infusion effect is poor, it is impossible to battery core is filled into electrolyte, influences to mend
The precision of liquid.And the effect of fluid infusion how is improved, the quality of production and production efficiency of battery are improved, reduces being produced into for battery
This, this is research staff's technical issues that need to address of enterprise.
The content of the invention
The purpose of the present invention is to overcome weak point of the prior art, there is provided a kind of benefit for being used to carry out battery fluid infusion
Liquid mechanism, the effect of fluid infusion is improved, improve the quality of production and production efficiency of battery, reduce the production cost of battery.
The purpose of the present invention is achieved through the following technical solutions：
A kind of fluid infusion mechanism for being used to carry out battery fluid infusion, including priming device and receipts residual liquid device；
The priming device includes fluid injection cup and liquid injecting mouth, and the fluid injection cup passes through soft pipe connection, institute with the liquid injecting mouth
State the vacuum pumping valve that priming device also includes forming evacuated path with the fluid injection cup, flexible pipe, liquid injecting mouth, the priming device
Also include being used for the lifting unit for driving the liquid injecting mouth lifting；
The lower section received residual liquid device and be located at the liquid injecting mouth.
In one of the embodiments, the lifting unit includes：Lift cylinder, lifting guide assembly, fluid injection plate, the liter
Sending down abnormally ascending cylinder drives the fluid injection plate to be installed on along the lifting guide assembly elevating movement, the liquid injecting mouth on the fluid injection plate.
In one of the embodiments, the lifting guide assembly includes：First lifting guide rail, the second lifting guiding
Rail, the first lifting bootstrap block, the second lifting bootstrap block, the first lifting guide rail and the described second lifting guide rail are mutually flat
Row and interval setting, the first lifting bootstrap block are slided in the described first lifting guide rail, and described second lifts guiding
Block is slided in the described second lifting guide rail, the both ends of the fluid injection plate be individually fixed in the first lifting bootstrap block and
The second lifting bootstrap block.
In one of the embodiments, the priming device include multiple fluid injection cups and with multiple fluid injection cups one
Multiple liquid injecting mouths corresponding to one.
A kind of fluid infusion mechanism for being used to carry out battery fluid infusion of the present invention, is filled by setting priming device and receiving Liquid Residue
Put, and design is optimized to the structure of said apparatus, improve the effect of fluid infusion, the quality of production and production for improving battery are imitated
Rate, reduce the production cost of battery.
Brief description of the drawings
Fig. 1 is the structure chart (one) for being used to carry out battery the fluid infusion mechanism of fluid infusion of one embodiment of the invention；
Fig. 2 is the structure chart (two) for being used to carry out battery the fluid infusion mechanism of fluid infusion of one embodiment of the invention；
Fig. 3 is the structure chart of the receipts residual liquid device shown in Fig. 1；
Fig. 4 is the profile of the filter at fluid injection cup；
Fig. 5 is the profile of fluid injection cup.
Embodiment
For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In accompanying drawing
Give the better embodiment of the present invention.But the present invention can realize in many different forms, however it is not limited to herein
Described embodiment.On the contrary, the purpose for providing these embodiments is to make to understand more the disclosure
Add thorough and comprehensive.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or there may also be element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
For illustrative purposes only, it is unique embodiment to be not offered as " right side " and similar statement.
Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to technical field of the invention
The implication that technical staff is generally understood that is identical.Term used in the description of the invention herein is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein " and/or " include one or more
The arbitrary and all combination of related Listed Items.
As shown in figure 1, a kind of fluid infusion mechanism 10 for being used to carry out battery fluid infusion, including priming device 100 and receipts residual
Liquid device 200.
Below, the concrete structure of priming device 100 is illustrated：
Priming device 100 includes fluid injection cup 110 and liquid injecting mouth 120, and by flexible pipe, (figure is not with liquid injecting mouth 120 for fluid injection cup 110
Show) connection.Priming device 100 also includes the vacuum pumping valve that evacuated path is formed with fluid injection cup 110, flexible pipe, liquid injecting mouth 120
130, priming device 100 also includes being used for the lifting unit 140 for driving liquid injecting mouth 120 to lift.Receive residual liquid device 200 and be located at fluid injection
The lower section of mouth 120.
The fluid infusion mechanism 10 for being used to carry out fluid infusion to battery of the present invention is first taken out by the way of fluid infusion is vacuumized to battery core
Vacuum, fluid infusion is then carried out, so as to improve the efficiency of fluid infusion and precision, while improve the qualification rate of battery core production.
Vacuum step is：The battery core for treating fluid infusion is placed on fixture, fixture is transported to below liquid injecting mouth by conveyer belt,
Liquid injecting mouth is moved downward, the liquid injection hole being aligned in battery core, seals liquid injection hole, and vacuum valve is opened, vacuumized, vacuum passes through successively
Fluid injection cup 110, flexible pipe, liquid injecting mouth 120, battery core are crossed, so as to take out the air in battery core.
The step of fluid infusion is：After battery core exhausts vacuum, vacuum valve is closed, and standby liquid diaphragm valve is opened, and electrolyte passes through fluid injection
The inlet of cup carries out fluid infusion, and electrolyte is successively by fluid injection cup 110, flexible pipe, liquid injecting mouth 120, battery core, so as to which electrolyte is defeated
Enter in battery core.
Due to the material of battery core or the reason such as too tight of battery core pressure, it can all cause electrolyte permeability slow, the fluid infusion time
It is long.While fluid infusion, by setting the positive pressure of nitrogen device being connected with fluid injection cup 110, nitrogen is being inputted just to fluid injection cup 110
Pressure, makes electrolyte quickly penetrate into battery core, also, nitrogen is a kind of inert gas, will not be reflected with electrolyte, and
Relatively cheap, so, efficiency high, quality better, cost is low.
As shown in Fig. 2 specifically, lifting unit 140 includes：Lift cylinder 141, lifting guide assembly 142, fluid injection plate 143.
Lift cylinder 141 drives fluid injection plate 143 to be installed on along the lifting elevating movement of guide assembly 142, liquid injecting mouth 120 on fluid injection plate 143.
Further, lifting guide assembly 142 includes：First lifting guide rail 142a, the second lifting guide rail 142b, the first lifting are drawn
Guide block 142c, the second lifting bootstrap block 142d.First lifting guide rail 142a with second lift guide rail 142b be parallel to each other and
It is arranged at intervals, the first lifting bootstrap block 142c is slided on the first lifting guide rail 142a, and the second lifting bootstrap block 142d is slided
Dynamic to be lifted located at second on guide rail 142b, the both ends of fluid injection plate 143 are individually fixed in the first lifting bootstrap block 142c and second
Lift bootstrap block 142d.Understand, lifting guide assembly 142 is by setting the first lifting guide rail 142a, the second lifting guide rail
142b, the first lifting bootstrap block 142c, the second lifting bootstrap block 142d, and design is optimized to the structure of its all parts,
So as to improve the lifting stability of liquid injecting mouth 120.
In the present embodiment, priming device 100 includes multiple fluid injection cups 110 and one-to-one with multiple fluid injection cups 110
Multiple liquid injecting mouths 120.By setting multiple fluid injection cups 110 and multiple liquid injecting mouths 120, multiple battery cores can be mended simultaneously
Liquid, greatly improve the efficiency of production.
As shown in figure 3, below, the structure that liquid device 200 is remained to receiving illustrates：
For battery core after secondary fluid infusion, fluid injection cup 110, liquid injecting mouth 120, flexible pipe etc., can Liquid Residues by the place of electrolyte
Body, if cleaning out not in time, the increase of next battery core fluid infusion weight can be caused, by increasing in the lower section of priming device 100
Residual liquid device 200 is received, the place of the entrained electrolytes such as fluid injection cup 110, liquid injecting mouth 120, flexible pipe is cleaned out, so
Improve fluid infusion precision.
Residual liquid device 200 is received, including：Receive Liquid Residue supporting plate 210, horizontal guide assembly 220, horizontal drive portion 230,
Receive Liquid Residue box body 240.
Horizontal guide assembly 220, which is installed on, to be received in Liquid Residue supporting plate 210, and it is past in the horizontal direction to receive Liquid Residue box body 240
Multiple to slide on horizontal guide assembly 220, the driving of horizontal drive portion 230 receives Liquid Residue box body 240 along horizontal guide assembly 220
Reciprocatingly slide.
Receive Liquid Residue box body 240 and offer residual liquid flow inlet 241, residual liquid flow inlet 241 is provided with sealing ring 242, close
Seal 242 is fixed at residual liquid flow inlet 241 by fixed block 243.
Specifically, horizontal drive portion 230 is cylinder driving structure, horizontal guide assembly 220 includes：First level guide rail
221st, the second horizontal guide rails 222, first level bootstrap block 223, the second horizontal bootstrap block 224.First level guide rail 221 with
Second horizontal guide rails 222 are parallel to each other and are arranged at intervals, and first level bootstrap block 223 slides and is located at first level guide rail
On 221, the second horizontal bootstrap block 224 is slided on the second horizontal guide rails 222, receives the both ends difference of Liquid Residue box body 240
It is fixed on 223 and second horizontal bootstrap block 224 of first level bootstrap block.
The operation principle for receiving residual liquid device 200 is as follows：
Horizontal drive portion 230, which promotes, receives Liquid Residue box body 240 so that the horizontal guiding of first level bootstrap block 223 and second
Block 224 reciprocatingly slides respectively along the horizontal guide rails 222 of first level guide rail 221 and second, receives Liquid Residue box body 240 and reaches
Specified location, prepare to collect Liquid Residue；
The Liquid Residue inflow for receiving Liquid Residue box body 240 is moved downward and reached under the driving of the lifting unit 140 of liquid injecting mouth 120
At mouth 241；
Nitrogen valve is opened, and blows away the liquid remained in fluid injection cup 110, flexible pipe, liquid injecting mouth 120, and so, next battery core is carried out
When fluid infusion, electrolyte would not increase, and prevent that battery core is overweight, improve the precision and efficiency of fluid infusion.
In the present embodiment, receive Liquid Residue box body 240 and offer multiple residual liquid flow inlets 241, multiple Liquid Residues flow into
Mouth 241 corresponds with multiple liquid injecting mouths 120, and multiple residual liquid flow inlets 241 are intervally arranged successively in " one " font.By setting
Multiple residual liquid flow inlets 241 are put, greatly improve the efficiency of production.
It is noted that priming device 100 before fluid infusion, can be vacuumized, while vacuumizing, will can remain
Electrolyte release, due to including a kind of lithium salts material in electrolyte solvent, lithium salts material can form crystalline solid, the crystallization
Cognition blocks electric valve, such as the component such as vacuum valve, vacuum meter, so as to reduce the service life of electric valve.To solve this
Technical problem, filter 300 is set at fluid injection cup 110, to adsorb the gas in electrolyte, reduces the damage to electric valve
Evil, reduce the cost that equipment uses.
As shown in figure 4, below, the concrete structure of filter 300 is illustrated：
A kind of filter 300, it includes filter cup body 310 and filter assemblies 320.Filter cup body 310 is both ends
The hollow cavity structure of opening, filter assemblies 320 are contained in the hollow cavity of filter cup body 310.
Filter assemblies 320 include：Filter support bar 321, the first chemical filter 322, the second chemical filter 323.The
One chemical filter 322 and the second chemical filter 323 are individually fixed in the both ends of filtering support bar 321, the first chemical filtering
The chemical filter 323 of device 322 and second is set respectively close to the both ends open of filter cup body 310.
Specifically, the first chemical filter 322 is the plate face plates of mesh, the first chemical filter 322 has the
One filter bores, the first envelope paper plug is provided with the first filter bores；Second chemical filter 323 is the plate face plates of mesh, the
Two chemical filters 323 have the second filter bores, and the second envelope paper plug is provided with the second filter bores.In the present embodiment, the first envelope
Paper plug structure spherical in shape, the second envelope paper plug structure spherical in shape.That is, the first chemical filter 322 and the second chemical filter 323
Structure is identical.
Understand, by setting filter 300 at fluid injection cup 110, can effectively adsorb the gas in electrolyte, reduce
Infringement to electric valve, reduce the cost that equipment uses.
It is noted that priming device 100 to battery core carry out fluid infusion, electrolyte mainly by fluid injection cup 110, flexible pipe,
Liquid injecting mouth 120 realizes the fluid infusion to battery core.After the completion of priming device 100 is to battery core fluid infusion, fluid injection cup 110 is outer by air pressure etc.
The influence of boundary's factor, the electrolysis retained is inevitably flow to liquid injecting mouth 120 by flexible pipe, forms weeping.For more
This technical problem is solved well, it is necessary to make further optimization to the structure of fluid injection cup 110.
As shown in figure 5, fluid injection cup 110 includes fluid injection cup body 111 and antidrip component 112.Fluid injection cup body 111 is two
The hollow cavity structure of end opening, fluid injection cup body 111 have inlet 113 and liquid outlet 114, and antidrip component 112 houses
Set in the hollow cavity of fluid injection cup body 111 and close to the liquid outlet 114 of fluid injection cup body 111.
Antidrip component 112 is the pipeline configuration for bending to " n " font, and antidrip component 112 has fluid input port 115
And fluid output port 116, the fluid input port 115 of antidrip component 112 are held in the chamber of the hollow cavity of fluid injection cup body 111
Wall, the fluid output port 116 of antidrip component 112 are plugged at the liquid outlet 114 of fluid injection cup body 111.
Further, fluid injection cup 110 also includes leakproof one-way valve 117, and leakproof one-way valve 117 is installed on fluid injection cup body
At 111 inlet 113.Leakproof one-way valve 117 includes motion bar 118 and elastic component 119, and motion bar 118 is arranged in fluid injection cup
The inlet 113 of body 111 simultaneously passes through the cavity wall elastic connection of elastic component 119 and the hollow cavity of fluid injection cup body 111.At this
In embodiment, elastic component 119 is spring.
The part that motion bar 118 is exposed to outside the hollow cavity of fluid injection cup body 111 is driven by cylinder (not shown), cylinder
Driving motion bar 118 stretches out, compression elastic piece 119a, you can opens valve, cylinder shrinks, and elastic component 119a resets, and drives and lives
Lever 118 resets, and closes valve.Leakproof one-way valve 117 serves automatic homing, self-sealing effect.
Open valve and liquid outlet is entered by the antidrip component 112 of bottom to electrolyte, electrolyte is noted in fluid injection cup 110
114, specifically, opening check valve, nitrogen injection, apply electrolyte pressure, electrolyte is entered liquid by antidrip component 112
Mouth 114, so, after fluid injection is complete, stop input nitrogen, also will not water clock even if there being electrolyte in fluid injection cup 110.
A kind of fluid infusion mechanism 10 for being used to carry out battery fluid infusion of the present invention, by setting priming device 100 and receiving residual
Liquid device 200 is stayed, and design is optimized to the structure of said apparatus, the effect of fluid infusion is improved, improves the quality of production of battery
And production efficiency, reduce the production cost of battery.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that come for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (4)
1. a kind of fluid infusion mechanism for being used to carry out battery fluid infusion, it is characterised in that including priming device and receive residual liquid device；
The priming device includes fluid injection cup and liquid injecting mouth, and the fluid injection cup passes through soft pipe connection, the note with the liquid injecting mouth
Liquid device also includes the vacuum pumping valve that evacuated path is formed with the fluid injection cup, flexible pipe, liquid injecting mouth, and the priming device also wraps
Include the lifting unit for driving the liquid injecting mouth lifting；
The lower section received residual liquid device and be located at the liquid injecting mouth.
2. the fluid infusion mechanism according to claim 1 for being used to carry out battery fluid infusion, it is characterised in that the lifting unit bag
Include：Lift cylinder, lifting guide assembly, fluid injection plate, the lift cylinder drive the fluid injection plate along the lifting guide assembly
Elevating movement, the liquid injecting mouth are installed on the fluid injection plate.
3. the fluid infusion mechanism according to claim 2 for being used to carry out battery fluid infusion, it is characterised in that the lifting guiding
Component includes：First lifting guide rail, the second lifting guide rail, the first lifting bootstrap block, the second lifting bootstrap block, described first
Lifting guide rail is parallel to each other and is arranged at intervals with the described second lifting guide rail, and the first lifting bootstrap block, which slides, is located at institute
State in the first lifting guide rail, the second lifting bootstrap block is slided in the described second lifting guide rail, the fluid injection plate
Both ends be individually fixed in it is described first lifting bootstrap block and it is described second lifting bootstrap block.
4. the fluid infusion mechanism according to claim 1 for being used to carry out battery fluid infusion, it is characterised in that the priming device
Including multiple fluid injection cups and with the one-to-one multiple liquid injecting mouths of multiple fluid injection cups.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710797327.XA CN107799715B (en) | 2017-09-06 | 2017-09-06 | Liquid supplementing mechanism for supplementing liquid to battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710797327.XA CN107799715B (en) | 2017-09-06 | 2017-09-06 | Liquid supplementing mechanism for supplementing liquid to battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107799715A true CN107799715A (en) | 2018-03-13 |
| CN107799715B CN107799715B (en) | 2021-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710797327.XA Active CN107799715B (en) | 2017-09-06 | 2017-09-06 | Liquid supplementing mechanism for supplementing liquid to battery |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110556505A (en) * | 2019-08-26 | 2019-12-10 | 龙能科技(宁夏)有限责任公司 | Machine adjusting device and method for liquid injection pump of liquid injection machine |
| CN110600670A (en) * | 2019-10-30 | 2019-12-20 | 东莞市德瑞精密设备有限公司 | Liquid injection cup and liquid injection method thereof |
| CN113506960A (en) * | 2021-06-26 | 2021-10-15 | 苏州贝爱特自动化科技有限公司 | Battery cell fluid infusion line |
| CN113506959A (en) * | 2021-06-26 | 2021-10-15 | 苏州贝爱特自动化科技有限公司 | Nitrogen injection and liquid supplementation line for lithium battery |
| CN114188678A (en) * | 2021-11-30 | 2022-03-15 | 广东利元亨智能装备股份有限公司 | Liquid injection device and liquid injection production line |
| CN114243233A (en) * | 2021-06-26 | 2022-03-25 | 苏州贝爱特自动化科技有限公司 | Nitrogen injection, liquid supplementing and rubber plug pulling line body |
| CN114243232A (en) * | 2021-06-26 | 2022-03-25 | 苏州贝爱特自动化科技有限公司 | Helium production line is annotated to fluid infusion |
| CN115463919A (en) * | 2022-08-25 | 2022-12-13 | 广东利元亨智能装备股份有限公司 | Cleaning device for liquid injection cup for battery |
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