CN103137997B

CN103137997B - Manufacturing method and manufacturing apparatus for electrical device with film covering

Info

Publication number: CN103137997B
Application number: CN201210518352.7A
Authority: CN
Inventors: 高田孝一; 本桥裕太
Original assignee: Nissan Motor Co Ltd
Current assignee: Envision AESC Japan Ltd
Priority date: 2011-12-05
Filing date: 2012-12-05
Publication date: 2015-06-10
Anticipated expiration: 2032-12-05
Also published as: KR20130062884A; KR101395497B1; CN103137997A

Abstract

The invention provides a manufacturing method and a manufacturing apparatus for an electrical device with film covering. The manufacturing method for the electrical device with film covering according to the invention can be employed to realize the effect that electrolyte is hard to be uneven in permeation in a battery set so that the electrolyte can be filled within a short time period. The manufacturing method for the electrical device with film covering comprises a pressure reducing procedure for reducing the pressure inside an electrolyte filling cavity equipped with a bag-shaped laminated film package body to lower than the atmospheric pressure, wherein the bag-shaped laminated film package body is provided with an opening part and accommodates the battery set, and the battery set is provided with an anode and a cathode which are laminated up and separated by an insulating film; an electrolyte filling procedure for filling the electrolyte of a specified amount from the opening part into the package body, after the pressuring reducing procedure; and a pressuring increasing and reducing procedure for increasing the pressure inside the electrolyte filling cavity to higher than the pressure in the electrolyte filling procedure and then reducing the pressure, after the electrolyte filling procedure and before sealing the opening part.

Description

The manufacture method of thin-film package electric device and manufacturing installation

Technical field

Manufacture method that to the present invention relates to battery, capacitor be representative, that electric device element is housed in the thin-film package electric device in laminated film and manufacturing installation.

Background technology

The electric device being representative with electrolytic capacitor, battery is by obtaining electric device element and be manufactured by shell seal subsequently in injecting electrolytic solution to the shell be made up of metal etc. being incorporated with electrode group.In addition, in the explanation of this specification, clip the stacked positive pole of barrier film and negative pole by having and a series of fluid injection operation being in electrolyte complete before the assembly of state (stage) be called " electrode group ", the assembly of the state (stage) after a series of fluid injection operation being in electrolyte is called " electric device element ", to distinguish.

In the past, by by the injecting electrolytic solution of ormal weight to vertical ground in the shell erect and subsequently long-time leaving standstill and make electrolyte gradually penetrate in the gap of electrode group.But, usually, because electrode group is by being closely laminated battery lead plate, so need the time that electrolyte just can be made to be impregnated in the gap of electrode group.In the gap that the electrolyte left standstill penetrates between electrode naturally, need to place such as diel, production efficiency extreme difference.

In addition, because the wetting-out rate of electrolyte is extremely slow, if so be supplied in shell by disposable for the electrolyte of required amount, then electrolyte can overflow from shell.Therefore, have employed in advance shell peristome watertight ground mounting cup and by the fluid injection in advance of the electrolyte of ormal weight to the method such as in this cover.But, due to the method mounting cup and labor intensive and time singly on shell, be therefore difficult to improve and manufacture efficiency.

Method is soaked in the fluid injection that Patent Document 1 discloses a kind of electrolyte for solving such problem.That is, reduce pressure after the peristome of shell being closed airtightly, by injecting electrolytic solution to the shell after being depressurized, electrolyte is impregnated in the gap of electrode group.Reduce pressure after fluid injection electrolyte, but after by decompression in shell fluid injection electrolyte, form one end hydrops.By in injecting electrolytic solution to the shell after being depressurized and after making in electrolyte permeability to the gap of electrode group, then make the pressure increase in shell and make the electrolyte permeability of hydrops in the gap of electrode group.

The method is temporarily formed as decompression state and gets rid of being present in the air soaked in the gap of electrode group, that hinder electrolyte, be formed as making electrolyte to be easy to after the state in gap that penetrates into fluid injection electrolyte again, afterwards, then carry out pressurizeing and by the injecting electrolytic solution of hydrops.Utilize the combination of decompression and pressurization like this, not only shorten the time of soaking into required for electrolyte, but also prevent the electrolyte when pressurization being discharged to disperse.

On the other hand, except the electric device of the metal shell of use as described above, also developed thin-film package electric device, the packaging body of this thin-film package electric device employs that the resin bed of the metal levels such as aluminium and heat sealability to be clipped binding agent superimposed and be configured to the laminated film packaging body of film.Usually, laminated film packaging body is formed as utilizing thinner resin bed by the structure of two surface coverage of metal level thinner for aluminium etc., its acidproof, alkaline-resisting and lightweight and have flexibility.

Patent documentation 1: Japanese Patent No. 3467135 publication

Different from metal shell, the laminated film packaging body of thin-film package electric device has flexibility.That is, laminated film packaging body is easily out of shape, and therefore to produce when fluid injection electrolyte the also unexistent problem of on-deformable metal shell.

First, the electrolyte be injected in the peristome of bag-shaped laminated film packaging body can not form hydrops at peristome, and between the interarea that can flow into electrode group and laminated film.Therefore, utilize hydrops temporarily by electrode group relative to outer closures, make to arrange pressure differential between electrode group and outside and the method that the electrolyte defining hydrops is impregnated into disclosed in patent documentation 1 such in electrode group can not be employed directly.Therefore, in the thin-film package electric device formed using laminated film packaging body, as mentioned above, need the time that electrolyte is impregnated in the gap of electrode group.In the gap that the electrolyte left standstill penetrates between electrode naturally, need to place such as diel, production efficiency extreme difference.

In addition, there is following problem: electrolyte not soaks in electrode group with same speed, the position soaked into making electrolyte, particularly at the central portion of electrode group, the phenomenon (soaking into inequality) that the liquid that is easy to produce electrolysis can not fully soak into.Soaking into of this electrolyte uneven also may appear on the surface of laminated film with the form of fold because laminated film has flexibility.

In addition, the soak into inequality of this electrolyte in electrode group makes to produce partly the lower region of ionic conduction characteristic between both positive and negative polarity in face, and its result, the electrical characteristic producing battery reduces such unfavorable condition.

Summary of the invention

Therefore, the object of the present invention is to provide a kind of manufacture method and device thereof of thin-film package electric device, the manufacture method of this thin-film package electric device and device thereof make electrolyte be difficult to generation in electrode group to soak into inequality, and can promote that electrolyte permeates at short notice after fluid injection, soak into.

In order to reach above-mentioned purpose, the manufacture method of thin-film package electric device of the present invention has the feature of each operation comprising following (1) ~ (3).

(1) there is decompression operation, this decompression operation be used for by be provided with bag-shaped laminated film packaging body fluid injection chamber in decompression to the pressure forced down than air, this bag-shaped laminated film packaging body has peristome, and being accommodated with electrode group, this electrode group has and clips the positive pole and negative pole that separating film layer gathers into folds.

(2) fluid injection operation is comprised, after above-mentioned decompression operation, by the electrolyte of regulation reservoir quantity from above-mentioned peristome to fluid injection in packaging body.

(3) comprise and add decompression operation, after above-mentioned fluid injection operation, close above-mentioned peristome before by the exert pressure in fluid injection chamber to higher than pressure during above-mentioned fluid injection operation, then to reduce pressure.

In addition, in order to reach above-mentioned purpose, the manufacturing installation of thin-film package electric device of the present invention has the feature of each parts comprising following (1) ~ (3).

(1) there are pressure adjusting parts, these pressure adjusting parts are used for adjusting the pressure be provided with in the fluid injection chamber of bag-shaped laminated film packaging body, this bag-shaped laminated film packaging body has peristome, and being accommodated with electrode group, this electrode group has and clips the positive pole and negative pole that separating film layer gathers into folds.

(2) have fluid injection parts, these fluid injection parts are used for electrolyte to be injected in packaging body from above-mentioned peristome.

(3) have control assembly, this control assembly controls as follows: utilize above-mentioned pressure adjusting parts to make decompression in fluid injection chamber to the pressure forced down than air, after decompression, utilize above-mentioned fluid injection parts to make the electrolyte of regulation reservoir quantity to fluid injection in packaging body.Also have control assembly, this control assembly controls as follows: before closing above-mentioned peristome, utilize above-mentioned pressure adjusting parts by the exert pressure in fluid injection chamber to higher than pressure during above-mentioned fluid injection, then reduce pressure.

Adopt the present invention, due to after fluid injection, close before carry out adding decompression, so can promote that after fluid injection electrolyte soaks into.Owing to being carry out adding decompression after fluid injection, keeping so electrolyte is isolated film, even if carry out adding decompression, also can not cause and disperse.Its result, can provide do not make electrolyte produce to soak into inequality and electrolyte can be made to permeate at short notice after fluid injection, the manufacture method of thin-film package electric device of soaking into and device thereof.

Accompanying drawing explanation

Fig. 1 is the cutaway view of the formation of the cell coated with film schematically showing the 1st execution mode.

Fig. 2 (a) be the cell coated with film schematically showing the 1st execution mode complete stereogram.

Fig. 2 (b) schematically shows the exploded perspective view cell coated with film of the 1st execution mode of Fig. 2 (a) being resolved into the state of each composed component.

Fig. 3 is the schematic stereogram of the generating element be described for interarea and the stacked side of the generating element in the cell coated with film to the 1st execution mode.

Fig. 4 is the schematic diagram of the formation of the fluid injection soakage device of the representational execution mode (the 1st execution mode) represented as thin-film package electric device manufacturing installation of the present invention, this fluid injection soakage device be used for by electrolyte to be accommodated with electrode group, the interior fluid injection of bag-shaped laminated film packaging body (battery unit) with peristome soaks into.

(j) of (a) ~ Fig. 5 of Fig. 5 represents that the fluid injection curve that method obtains and the figure soaking into state are soaked in the fluid injection of the electrolyte undertaken by the fluid injection soakage device of present embodiment.

Fig. 6 represents that each reservoir quantity of fluid injection step and the figure of vacuum pressure of method are soaked in the fluid injection of the electrolyte undertaken by the fluid injection soakage device of present embodiment.

(a) of Fig. 7, (b) of Fig. 7 are the figure representing the situation producing foam when fluid injection.

Embodiment

Hereinafter, with reference to the accompanying drawings of embodiments of the present invention.In addition, in the description of the drawings, mark identical Reference numeral to identity element, the repetitive description thereof will be omitted.In addition, for convenience of explanation, the dimension scale of accompanying drawing is exaggerated, sometimes different with the ratio of reality.

Fig. 1 is the cutaway view of the formation of the cell coated with film schematically showing the 1st execution mode.Fig. 2 is the stereogram of the cell coated with film schematically showing the 1st execution mode, Fig. 2 (a) be cell coated with film complete stereogram, Fig. 2 (b) schematically shows the exploded perspective view cell coated with film of the 1st execution mode of Fig. 2 (a) being resolved into each composed component state.

cell coated with film

The formation summary of the cell coated with film 10 of the 1st execution mode is described.

As shown in Figure 1, the cell coated with film 10 of present embodiment has such structure: the inside actual substantially rectangular generating element 21 carrying out discharge and recharge reaction being enclosed in the bag-shaped laminated film as packaging body 29.Specifically, the cell coated with film 10 of present embodiment has generating element 21 and packaging body 29, this packaging body 29 is made up of bag-shaped laminated film, and generating element 21 is received together with the positive pole curren-collecting part 12b and negative pole curren-collecting part 11b being located at generating element 21 by this packaging body 29.Cell coated with film 10 also has the positive tab 27 being connected to positive pole curren-collecting part 12b and the negative tab 25 being connected to negative pole curren-collecting part 11b.

Here, in the present embodiment, clip the stacked positive plate of barrier film (positive pole) 16 and negative plate (negative pole) 14 by having and a series of fluid injection operation being in electrolyte 20 complete before the assembly of state (stage) be called " electrode group ", using the assembly of the state (stage) after a series of fluid injection operation that is in electrolyte 20 is complete as " generating element ", distinguish with this.Electrolyte 20 is mainly used in dielectric substrate 17, and this dielectric substrate 17 is for forming generating element 21.Specifically, dielectric substrate 17 can be formed by being impregnated in barrier film by electrolyte 20.But, all electrolyte 20 is not necessarily made only to be impregnated in barrier film, make also to soak in electrode active material layer 13,15 have electrolyte 20 ideal, and electrolyte can also be present in the gap (space part) between generating element 21 and packaging body 29.

As shown in Fig. 2 (a), Fig. 2 (b), in order to each layer electrode (negative electrode collector 11, the positive electrode collector 12) extracted current from generating element 21, be extended with the epitaxy part 11a be made up of metallic plate (or metal forming) of negative pole curren-collecting part 11b, the epitaxy part 12a be made up of metallic plate (or metal forming) of positive pole curren-collecting part 12b from each layer electrode (negative electrode collector 11, positive electrode collector 12) of generating element 21.Respective epitaxy part 11a, the 12a of each layer electrode (negative electrode collector 11, positive electrode collector 12) is connected to negative tab 25, positive tab 27 at negative pole curren-collecting part 11b, positive pole curren-collecting part 12b place respectively.Specifically, each negative electrode collector 11 and positive electrode collector 12 are connected to one end of epitaxy part 11a, 12a, the other end of each epitaxy part 11a, 12a are arranged or is connected with each curren-collecting part 11b, 12b.In addition, negative tab 25 and positive tab 27 have following structure: the outside being exported to this packaging body 29 in the mode of the end (closure or mouth-sealed portion 29f) being sandwiched in the packaging body 29 be made up of bag-shaped laminated film.Epitaxy part 11a, the epitaxy part 12a of positive pole curren-collecting part 12b of negative tab 25, positive tab 27, negative pole curren-collecting part 11b, the negative electrode collector 11 of each electrode and positive electrode collector 12 separately between connection utilize ultrasonic bonding, resistance welded etc. to carry out installation ideal.

In Fig. 2 (a), Fig. 2 (b), the packaging body 29 be made up of bag-shaped laminated film being formed with the recess 29e for receiving generating element 21, in addition, showing about packaging body 29 and making two laminated films relatively and the type of being closed by 4 bandings.But, present embodiment is not limited thereto, and also the smooth laminated film not being formed with recess can be used as packaging body 29, also go for being turned back by 1 laminated film and the type of being closed by 3 bandings.Or laminated film that also can be smooth by two of not being formed with recess is used as packaging body, also go for making two laminated films superimposed and type that is that closed by 4 bandings etc., there is no particular restriction.

As shown in Figure 1, generating element 21 multiple negative plates (negative pole) 14 all in the form of a substantially rectangular and multiple positive plate (positive pole) 16 are clipped dielectric substrate 17 all in the form of a substantially rectangular alternately laminated multi-layer form.Negative plate (negative pole) 14 is made up of the negative electrode active material layer 13 of negative electrode collector 11 with the two sides being formed at this negative electrode collector 11.Positive plate (positive pole) 16 is made up of the positive electrode active material layer 15 of positive electrode collector 12 with the two sides being formed at this positive electrode collector 12.In addition, dielectric substrate 17 forms in the barrier film (comprising nonwoven fabrics barrier film) electrolyte 20 being impregnated into Porous.Namely, by negative plate (negative pole) 14, dielectric substrate 17 and positive plate (positive pole) 16 with this order laminated multi-layer, 1 of negative plate 14 negative electrode active material layer 13 and 1 positive electrode active material layer 15 of positive plate 16 adjacent is with it made to clip dielectric substrate 17 relative and form 1 monocell layer 19.Thus, can say that the cell coated with film 10 of present embodiment has the structure by being made by monocell layer 19 laminated multi-layer the monocell layer 19 of multilayer electrically in parallel.In addition, although two that are positioned at generating element 21 outermost outermost layer negative electrode collectors are all only be configured with negative electrode active material layer 13 in a face, also negative electrode active material layer 13 can be set on two sides.That is, the collector body that the outermost layer that also can not be formed as only being provided with active material layer in a face is special, but had on two sides the collector body of active material layer to be directly used as outermost collector body.In addition, also can be contrary with Fig. 1 by the configuration of the configuration and negative pole that make positive pole, make outermost layer positive electrode collector be positioned at two outermost layers of generating element 21, on the face making positive electrode active material layer 15 be configured in this outermost layer positive electrode collector or two sides.Below, specify in the present embodiment, as shown in Figure 3, the face of the generating element 21 seen at stacked direction is called interarea 21a, the face of the generating element 21 seen from the direction vertical with stacked direction is called stacked side 21b.

As shown in Figure 1, each negative plate 14 is at negative electrode collector 11(such as Copper Foil) two sides be formed with negative electrode active material layer (negative electrode) 13 by applying, each positive plate (positive pole) 16 is at positive electrode collector 12(such as aluminium foil) two sides be formed with positive electrode active material layer (anode electrode) 15 by applying.Negative electrode collector 11 and positive electrode collector 12 extend out from lamination area.Specifically, as shown in Figure 1, Figure 2 shown in (b), for the epitaxy part not having coated electrode material of each negative electrode collector 11, positive electrode collector 12, by the epitaxy part 11a of negative plate side each other and the epitaxy part 12a of positive plate side ultrasonic bonding once separately from each other.Thus form the positive pole curren-collecting part 12b as relay and negative pole curren-collecting part 11b.Meanwhile, also by ultrasonic bonding, negative tab 25 is connected with negative pole curren-collecting part 11b, positive tab 27 is connected with positive pole curren-collecting part 12b.

As 1 example, laminated film packaging body 29 is formed by the laminated film doubling of 1 rectangular shape as described above, is surrounded for being clamped from its thickness direction both sides by generating element 21.The laminated film that packaging body 29 uses is heat sealability resin bed, metal level (such as aluminium foil) and (insulating properties) protective layer with heat sealability is stacked and form.For 1 example, making by PP(polypropylene) the heat sealability resin bed that forms becomes the layer of the inner side of the cell coated with film 10 of present embodiment, by the heat-fused portion thermal welding of the peripheral part (outer edge) by laminated film packaging body 29, form closure (mouth-sealed portion) 29f.Thus received generating element 21 is closed (sealing or insulation sealing).But, about the laminated film packaging body 29 of present embodiment, not by any restriction of above-mentioned formation, known various laminated film packaging body suitably can be used.

As electrolyte 20, the LiPF risen with 1mol/ can be used ₆for supporting electrolyte, the electrolyte that is solvent with the mixed solvent of propene carbonate and ethylene carbonate (mass ratio 50:50).But, in the present embodiment, electrolyte 20 is not by any restriction of above-mentioned electrolyte.That is, electrolyte 20 has the form being dissolved with appropriate supporting electrolyte in a solvent.Such as, as solvent, except above-mentioned ethylene carbonate (EC) and propene carbonate (PC), the carbonates equal solvent such as dimethyl carbonate (DMC), diethyl carbonate (DEC) can also be used.Above-mentioned solvent can be used alone a kind, also can two or morely use together.In addition, as supporting electrolyte, except above-mentioned LiPF ₆, can also Li(CF be used ₃sO ₂) ₂n, Li(C ₂f ₅sO ₂) ₂n, LiBF ₄, LiAsF ₆, LiTaF ₆, LiClO ₄, LiCF ₃sO ₃deng.Above-mentioned supporting electrolyte can be used alone a kind, also can two or morely use together.In addition, the concentration of supporting electrolyte also suitably can be determined in the scope that 0.5mol/ liter ~ 2mol/ rises left and right, but not by any restriction of this scope.

the manufacturing installation of cell coated with film

Below, the formation of accompanying drawing to the fluid injection soakage device in the present embodiment for being soaked into fluid injection in cell coated with film unit by electrolyte is used to be described.

Fig. 4 be represent as thin-film package electric device manufacturing installation of the present invention a representational execution mode (the 1st execution mode), the schematic diagram of the formation of fluid injection soakage device for electrolyte is soaked into fluid injection in cell coated with film unit.

As shown in Figure 4, the fluid injection soakage device 1 of present embodiment has fluid injection chamber 2, has the filling box 3 of pressing fixture 3a, electrolyte supply pipeline 4, exhaust line 5, gas introduction tube line 6 and control part 7.

Control part 7 carries out action control to pressing fixture 3a, the vacuum pump 5b being connected to exhaust line 5, the container 4a of electrolyte that is connected to electrolyte supply pipeline 4.In addition, below, the action of each several part controlled by control part 7 is described in detail.

Filling box 3 is provided with in fluid injection chamber 2, this filling box 3 has pressing fixture 3a, this pressing fixture 3a is for receiving battery unit 10a(Fig. 4 of the state of multiple not yet fluid injection electrolyte 20), the wall in fluid injection chamber 2 is connected to electrolyte supply pipeline 4, exhaust line 5 and gas introduction tube line 6.

The pressing fixture 3a that filling box 3 is equipped with is the tabular fixture (board member) arranged in the mode stably kept by multiple battery unit 10a of the not yet state of fluid injection electrolyte.From being accommodated with the peristome 29a of bag-shaped laminated film packaging body 29 of electrode group 21 ' in this bag-shaped laminated film packaging body 29 during fluid injection electrolyte 20, this pressing fixture 3a can be utilized from (the two interarea 21a sides, thickness direction both sides of electrode group 21 '; With reference to Fig. 3) clamp packaging body 29 and kept.

Be accommodated with the laminated film packaging body 29 being pressed the electrode group 21 ' that fixture 3a clamps and be formed as bag-shaped.That is, bag-shaped laminated film packaging body 29 is at the limit place except the peristome 29a of top by thermal welding, only has peristome 29a to be opening.This electrolyte 20 can be injected into from peristome 29a the bag shape be accommodated with in the bag-shaped laminated film packaging body 29 of electrode group 21 ' to be formed.

One end of the electrolyte supply pipeline 4 of formation fluid injection parts is connected to the case 4a for storing electrolyte.The other end of electrolyte supply pipeline 4 is divided into many in midway, and each system is connected to electrolyte shifting pump (the electrolyte supply pump on electrolyte supply pipeline) 4c.Electrolyte shifting pump 4c is connected to valve (the opening and closing valve on electrolyte supply pipeline or flow control valve) 4d.Valve 4d carries out open and close controlling by control part 7 or aperture regulates, can at every turn marginally several times to fluid injection in each system.Above-mentioned pump 4c and valve 4d is arranged on the outside in fluid injection chamber 2, and is connected with each fluid injection nozzle 4b be located in fluid injection chamber 2.The fluid injection nozzle 4b of another side of electrolyte supply pipeline 4 configures in the mode corresponding with the peristome 29a of the laminated film packaging body 29 of opening upward.This is that electrolyte 20 in order to will supply from electrolyte supply pipeline 4 injects from peristome 29a.

In the present embodiment, multiple fluid injection nozzle 4b can move to above the peristome 29a of multiple battery unit 10a side by side successively.Thus, repeatedly electrolyte 20 can be supplied to multiple battery unit 10a successively by 1 nozzle 4b.As the structure that can make fluid injection nozzle 4b movement, the running rail (not shown) be such as located in fluid injection chamber 2 can be considered.Fluid injection nozzle 4b can be made along this rail moving.

The exhaust line 5 forming pressure adjusting parts (mainly the adjustment member of depressurised side) mainly has valve 5a and vacuum pump 5b, and is connected to control part 7, inside, fluid injection chamber 2 can be vacuumized and make fluid injection chamber 2 inner pressure relief.

The gas introduction tube line 6 forming pressure adjusting parts (mainly the adjustment member of pressure side) rises from vacuum state or decompression state for making to press in fluid injection chamber 2 by importing dry air or non-active gas to the inside, fluid injection chamber 2 after utilizing exhaust line 5 to vacuumize.This gas introduction tube line 6 mainly has valve (the opening and closing valve on gas introduction tube line or flow control valve) 6a and air receiver 6b, and valve 6a is connected to control part 7 etc., inside, fluid injection chamber 2 can be made to rise (pressurization, boosting) from vacuum state or decompression state.

the manufacture method of cell coated with film

Next the operation included by the manufacture method of the cell coated with film of present embodiment is described.

method is soaked in the fluid injection of electrolyte

Below, use the fluid injection of accompanying drawing to the electrolyte 20 utilizing the fluid injection soakage device 1 being used for the present embodiment of being soaked into fluid injection in cell coated with film unit by electrolyte to carry out to soak into method to be described.(a) ~ (j) of Fig. 5 represents that the fluid injection curve that method obtains and the figure soaking into state are soaked in the fluid injection of the electrolyte 20 undertaken by the fluid injection soakage device 1 of present embodiment.Fig. 6 represents that each reservoir quantity of fluid injection step and the figure of vacuum pressure of method are soaked in the fluid injection of the electrolyte 20 undertaken by the fluid injection soakage device 1 of present embodiment.(a) of Fig. 7, (b) of Fig. 7 are the figure representing the situation producing foam when fluid injection.

In addition, from (a) to (j) in Fig. 5 represents that the electrolyte the pressure operation process after from the fluid injection initial stage to fluid injection final stage, fluid injection is impregnated into the figure of the situation of the battery surface of the left end of filling box.In figure, be provided at the part of the not yet fluid injection of outermost layer barrier film before electrolyte soaks into of battery surface by the part that white represents.On the other hand, what be provided at the outermost layer barrier film of battery surface by the part that black represents soaks into the part having electrolyte.This battery obtains as follows: as shown in Figure 1, and electrode is positioned at the surface of common battery, but in detail in this figure, what soak into barrier film for ease of supervision electrolyte soaks into state, and battery surface is also provided with barrier film.Like this, in the cell coated with film of present embodiment, do not get rid of the mode that any outermost layer in electrode group arranges barrier film.

With in the chart shown in (a) ~ (j), Fig. 6 of Fig. 5, represent about the fluid injection nozzle fluid injection by Fig. 4, the reservoir quantity of battery unit 10a and the relation between the time.

(a) of Fig. 7 represents that degree of decompression during fluid injection is improved (as condition of high vacuum degree) produces foam to the pressure causing the air soaked into hindering electrolyte to expand and the figure that result in the existing fluid injection state that electrolyte disperses.(b) of Fig. 7 is the figure representing fluid injection state degree of decompression during fluid injection being suppressed to the present embodiment that the pressure hindering the air soaked into of electrolyte to expand can not be caused to inhibit electrolyte to disperse to suppress foam to produce.

As shown in (a) ~ (j) of Fig. 5, the fluid injection of the electrolyte 20 utilizing the fluid injection soakage device 1 of present embodiment to carry out soaks into method will to be maintained in the full dose of the electrolyte 20 of regulation reservoir quantity in fluid injection chamber 2 under the constant state of the pressure that forces down than air from above-mentioned peristome 29a to fluid injection in packaging body 29.It is the time point of the A of the zone circle in Fig. 5 (a) ~ (j) by the time point of the full dose fluid injection of the electrolyte 20 of regulation reservoir quantity.The fluid injection of the electrolyte 20 of present embodiment to be soaked into the full dose of electrolyte 20 under the state that method remains unchanged after by pressure (decompression) decompression in fluid injection chamber 2 to the peristome 29a fluid injection of bag-shaped laminated film packaging body 29 being accommodated with electrode group 21 ', specifically, as shown in (a) ~ (j), Fig. 6 of Fig. 5, maintain the constant state of pressure (decompression) during #1 fluid injection step ~ #7 fluid injection step under, carry out the fluid injection of electrolyte 20 in the following order.

decompression operation

As shown in Figure 4, in fluid injection chamber 2, multiple battery unit 10a is fitly arranged with.

Next, by control part 7, under the state opened by valve 5a, drive the vacuum pump 5b of exhaust line 5 and reduce pressure in fluid injection chamber 2 to the pressure forced down than air.Be valve-off 5a after reaching the vacuum degree of regulation.In this condition, the inside in the fluid injection chamber 2 of the inside of above-mentioned electrode group 21 ' is comprised by the pressure having arrived and specified that reduces pressure equably.In addition, as shown in (a) ~ (j) of Fig. 5, fluid injection stage the T1 of (a) ~ (j) of Fig. 5 (such as, before), fluid injection is carried out ideal with the pressure higher than the degree of decompression of (such as, T5, T8, T10 of (a) ~ (j) of Fig. 5) when carrying out pressure operation after fluid injection.Carry out fluid injection like this and have following advantage: in the fluid injection stage, during electrolyte 20 soaks in barrier film etc., can effectively prevent (contrast are with reference to (a) of Fig. 7 and (b) of Fig. 7) such as dispersing because of foaming.In addition, as shown in (a) ~ (j), Fig. 6 of Fig. 5, although as long as the pressure that forces down than air of degree of decompression in fluid injection chamber 2, preferably electrolyte 20 can not be caused to seethe with excitement violent foamed state scope in decompression arrive pressure closer to vacuum.Thereby, it is possible to the unnecessary air (gas) in battery unit 10a is extruded, can pneumatosis be prevented, electrolyte can be made fully to soak into.Such as, be preferably the pressure of below 5kPa, the more preferably pressure of below 3kPa, particularly preferably in about 1.5kPa ~ 2kPa scope.But, present embodiment is not by any restriction of this scope.

As shown in (a) of Fig. 5, the state of soaking in this operation is that less than not soaking in barrier film, whole face is all white to electrolyte.

fluid injection operation

Next, by under being maintained in the constant state of the pressure (pressure forced down than air) reached by above-mentioned decompression operation in above-mentioned fluid injection chamber 2, will specify that the full dose of the electrolyte of reservoir quantity (electrolyte content of regulation) is from above-mentioned peristome 29a to fluid injection in described packaging body 29.

Specifically, the peristome 29a via the upper section of packaging body 29 injects by fluid injection nozzle 4b each marginally several times (dividing 7 times among (a) ~ (j), Fig. 6 of Fig. 5) full dose the electrolyte 20 specifying reservoir quantity (electrolyte content of regulation) from electrolyte supply pipeline 4.The whole interarea that thickness direction due to electrode group 21 ' is pressed the board member of fixture 3a moderately presses, so do not have electrolysis liquid 20 to flow into the gap of the central portion of the interarea 21a side of electrode group 21 ' in electrode group 21 '.In addition, press owing to being pressed fixture 3a, so the gap between multiple positive plates of formation electrode group 21 ', barrier film, negative plate is less, electrolyte 20 flow between multiple positive plate, barrier film, negative plate hardly.And, because comprise electrode group 21 '

Inside interior fluid injection chamber 2 inside by equably decompression to regulation pressure, so electrolyte 20 attracted to the inside of electrode group 21 ' hardly because of the effect of the negative pressure in electrode group 21 '.Therefore, in fluid injection operation, to specify that the electrolyte 20 of reservoir quantity (electrolyte content of regulation) each marginally injects several times ((a) → (b) → (d ') with reference to Fig. 5), until all become the state of being soaked by electrolyte 20 near from the peripheral part of electrode group 21 ' to central portion.

Specifically, as shown in (d ') of Fig. 5, known: at the time point that this operation is complete, electrolyte 20 is not impregnated into the central portion of the interarea 21a side of electrode group 21 ', the state of soaking into of barrier film is also that central portion still keeps white constant, and central portion not yet soaks into.

In addition, as shown in (a) ~ (j), Fig. 6 of Fig. 5, why in this operation by each for electrolyte 20 marginally fluid injection several times, be disperse to prevent electrolyte from overflowing from packaging body 29.Spended time is needed to be impregnated in electrode group 21 ' to make electrolyte.Even the electrolyte of the amount of finally soaking into, if carry out disposable fluid injection under the state that can not soak into completely, then electrolyte also likely overflows from packaging body 29.But, in this operation, even when marginally separating fluid injection at every turn, also for the gap that the electrolyte 20 of institute's fluid injection flows rapidly into.Therefore known: the electrolyte 20 of fluid injection in this operation produces some foams ((b) with reference to Fig. 7) in the upper side of electrode group 21 ', on one side be easier to immersed (that is, have some gaps, be difficult to apply pressing force) peripheral part infiltration (soaking into) from the ratio of electrode group 21 ' at leisure and enter ((a) → (b) → (d ') with reference to Fig. 5).In addition, as shown in (a) ~ (j), Fig. 6 of Fig. 5, the vacuum pressure in this operation to be maintained in front operation decompression and to keep constant to the state of the pressure forced down than air.

In addition, in this operation, in battery unit 10a, be marginally filled with the electrolyte 20 of regulation reservoir quantity (electrolyte content of regulation) several times by fluid injection nozzle 4b at every turn.Specifically, shown in the chart of the fluid injection curve as shown in (a) ~ (j), Fig. 6 of Fig. 5, divide 7 times by regulation reservoir quantity (electrolyte content of regulation) fluid injection at leisure in official hour from #1 fluid injection step to #7 fluid injection step.

As shown in (a) ~ (j), Fig. 6 of Fig. 5, from 1 battery unit 10a, it is after self is by fluid injection, can again by fluid injection after other battery unit 10a is by fluid injection.Thus, known: during other battery unit 10a is by fluid injection, this 1 battery unit 10a maintains not by the state of fluid injection.By carrying out fluid injection like this, promote in the Time constant after each fluid injection electrolyte to soak into this respect ideal.But, in the present embodiment, not by any restriction of foregoing, fluid injection number of times, reservoir quantity, fluid injection time, degree of decompression etc. are suitably determined according to battery size, shape, concentration of electrolyte etc.Such as, ideal fluid injection number of times is: can not reduce fluid injection number of times as far as possible because of in the scope that a large amount of for electrolyte fluid injection sprayed, disperse, thus by electrolyte content without waste, fluid injection effectively, shorten the fluid injection time of electrolyte.When the way increasing fluid injection number of times because of pressure condition can shorten the fluid injection time of electrolyte, can say that increase fluid injection number of times is ideal.

As previously discussed, make to determine optimal fluid injection number of times etc. in the optimized process of various condition.In addition, as shown in Figure 6, at this in-process, reservoir quantity has along with fluid injection number of steps increases and the tendency of minimizing.This is because along with fluid injection number of times increases, electrolyte 2 becomes the central portion of the interarea 21a side being difficult to be impregnated into electrode group 21 ', so reduce by making reservoir quantity increase along with fluid injection number of steps, can effectively suppress to disperse.The fluid injection time can according to vacuum degree, suitably determine to the wetting-out rate of electrode group 21 '.It is ideal that degree of decompression is set to higher vacuum degree electrolyte 20 can be suppressed as described above acutely to foam because of boiling, in the scope of dispersing.This is because: because air residual is inner at battery unit 10a, in the fluid injection stage, electrolyte can not penetrate in this residual air part, likely produces pneumatosis.

In addition, battery unit number, fluid injection nozzle number are also suitably determined.Such as, battery unit 10a and fluid injection nozzle 4b also can be made to be identical quantity, to use fixed nozzle, the system etc. omit movable mechanism, this movable mechanism being controlled, thus reduce the system failure.In addition, also depend on the size in fluid injection chamber 2, both multiple filling box can be arranged planar, also multiple filling box can be carried out three-dimensional stacked mode arrange to separate suitable interval, aforesaid way can also be combined.Filling box 3 also both can be the mode as shown in Figure 4 multiple battery unit 10a being lined up 1 row, also can be the mode multiple battery unit 10a being lined up multiple row.In addition, filling box 3 can be both box-shaped as shown in Figure 4, also can be circular.When filling box 3 is circular, multiple battery unit 10a is arranged in order in the radial direction.

From #1 fluid injection step to #7 fluid injection step, why the reservoir quantity of each step reduces gradually, this is because: need to soak into into towards central portion further from the periphery of electrode group 21 ' along with fluid injection step goes on, the reservoir quantity that electrolyte 20 can soak into also tails off gradually.Therefore, in this operation, even if with after specifying that reservoir quantity (electrolyte content of regulation) carries out fluid injection, sizable part of the central portion of the barrier film of electrode group 21 ' is also still in not yet fluid injection state ((a) → (b) → (d ') with reference to Fig. 5).

the variation of fluid injection operation

Next, the preferred variation of method is soaked in fluid injection as the electrolyte 20 of present embodiment, as above-mentioned fluid injection operation, carry out the 1st following fluid injection operation: by under being maintained in the constant state of post-decompression pressure in fluid injection chamber, will the part of electrolyte of regulation reservoir quantity from above-mentioned peristome to fluid injection in packaging body.Afterwards, carry out the 2nd following fluid injection operation: after making to boost to the pressure higher than above-mentioned pressure in fluid injection chamber further, by the maintain constant pressure time after boosting and by the remainder fluid injection of the regulation reservoir quantity of electrolyte.Below, describe the above-mentioned fluid injection operation as present embodiment in detail and carry out the preference of preferred 1st fluid injection operation and the 2nd fluid injection operation.

The feature that method is soaked in the fluid injection of the electrolyte 20 of this variation is, by electrolyte 20 to be accommodated with electrode group 21 ' bag-shaped laminated film packaging body 29 peristome 29a fluid injection process in, pressure (decompression) is made to go up to atmospheric pressure side (being less than atmospheric pressure) and keep Time constant, specifically, the feature that method is soaked in the fluid injection of the electrolyte 20 of this variation is, as (a) ~ (j) of Fig. 5, shown in Fig. 6, between #4 fluid injection step and #5 step, pressure (decompression) is gone up to atmospheric pressure side (being less than atmospheric pressure), during #5 fluid injection step ~ #7 fluid injection step, by this maintain constant pressure time.So, carry out the fluid injection of electrolyte 20 in the following order.

1st fluid injection operation

Next, in the preferred mode of present embodiment, by under being maintained in the constant state of the pressure (pressure forced down than air) reached by above-mentioned decompression operation in fluid injection chamber 2, will specify that a part for the electrolyte of reservoir quantity (electrolyte content of regulation) is from above-mentioned peristome 29a to fluid injection in above-mentioned packaging body 29.

Specifically, via the peristome 29a of the upper section of packaging body 29, from electrolyte supply pipeline 4 by each marginally several times part injecting (dividing 4 times among (a) ~ (j), Fig. 6 of Fig. 5) electrolyte 20 of regulation reservoir quantity (electrolyte content of regulation) of fluid injection nozzle 4b.Such as, as shown in the fluid injection curve of (a) ~ (j) of Fig. 5, Fig. 6, about 60% fluid injection of the electrolyte 20 of reservoir quantity (electrolyte content of regulation) will be specified.

Thickness direction due to electrode group 21 ' is pressed the whole interarea appropriateness pressing of the board member of fixture 3a, so do not have electrolysis liquid 20 to flow into the gap of the central portion of the interarea 21a side of electrode group 21 ' in electrode group 21 '.In addition, press owing to being pressed fixture 3a, so the gap between multiple positive plates of formation electrode group 21 ', barrier film, negative plate is less, electrolyte 20 flow between multiple positive plate, barrier film, negative plate hardly.And, owing to comprising the inside in the fluid injection chamber 2 of the inside of electrode group 21 ' by the pressure of the regulation that reduces pressure equably, so electrolyte 20 also can not attracted to the inside of electrode group 21 ' because of the negative pressure in electrode group 21 '.Therefore, in the 1st fluid injection operation, to specify that a part (being overall about 6 one-tenth in (a) ~ (j), Fig. 6 of Fig. 5) for the electrolyte 20 of reservoir quantity (electrolyte content of regulation) is each marginally to inject several times ((b) with reference to Fig. 5), until the state that the peripheral part becoming electrode group 21 ' is soaked by electrolyte 20.

Specifically, as Fig. 5 (b) soak into shown in state, known: at the time point that this operation is complete, electrolyte 20 is not impregnated into the central portion of the interarea 21a side of electrode group 21 ', the state of soaking into of barrier film is also that central portion still keeps white constant, and central portion not yet soaks into.In addition, as shown in (a) ~ (j), Fig. 6 of Fig. 5, why in this operation by each for electrolyte marginally fluid injection several times, this disperses to prevent electrolyte from overflowing from packaging body 29.Spended time is needed to be impregnated in electrode group 21 ' to make electrolyte.Even the electrolyte of the amount of finally soaking into, if once carry out fluid injection to property in the state that can not soak into completely, then electrolyte also likely overflows from packaging body 29.But, in this operation, even if when marginally separately carrying out fluid injection at every turn, also not for the gap that the electrolyte 20 of institute's fluid injection flows rapidly into.Therefore, known: electrolyte 20 produces some foams ((a) with reference to Fig. 7) in the upper side of electrode group 21 ', on one side be easier to immersed (that is, have some gaps, be difficult to apply pressing force) peripheral part infiltration (soaking into) from the ratio of electrode group 21 ' at leisure and enter ((b) with reference to Fig. 5).In addition, as shown in (a) ~ (j), Fig. 6 of Fig. 5, the vacuum pressure in this operation to be maintained in front operation decompression and to keep constant to the state of the pressure forced down than air.

In addition, in this operation, in battery unit 10a, be marginally filled with a part for the electrolyte 20 of regulation reservoir quantity (electrolyte content of regulation) several times by fluid injection nozzle 4b at every turn.Specifically, shown in the chart of the fluid injection curve as shown in (a) ~ (j), Fig. 6 of Fig. 5, from #1 fluid injection step to #4 fluid injection step divide 4 times slowly fluid injection to about 60% of regulation reservoir quantity (electrolyte content of regulation).

As previously discussed, make to determine optimal fluid injection number of times etc. in the optimized process of various condition.In addition, as shown in Figure 6, at this in-process, reservoir quantity has along with fluid injection number of steps increases and the tendency of minimizing.Can say accordingly: for the viewpoint of fluid injection time shortening electrolyte while preventing the dispersing of electrolyte, can the reservoir quantity of fluid injection be set to about roughly 50% ~ 70% ideal by under the state maintaining the pressure forced down than air.The fluid injection time suitably can be determined according to vacuum degree, the wetting-out rate that soaks into electrode group 21 '.Degree of decompression is can be set to higher vacuum degree suppressing that electrolyte 20 acutely foam because of boiling, in the scope of dispersing as described above ideal.This is because: because air residual is inner at battery unit 10a, in the fluid injection stage, electrolyte can not penetrate in this residual air part, likely produces pneumatosis.

In addition, battery unit number, fluid injection nozzle number are also suitably determined.Such as, battery unit 10a and fluid injection nozzle 4b also can be made to be identical quantity, to use fixed nozzle, the system etc. omit movable mechanism, this movable mechanism being controlled, thus reduce the system failure.In addition, also depend on the size in fluid injection chamber, both multiple filling box can be arranged planar, also multiple filling box can be carried out three-dimensional stacked mode arrange to separate suitable interval, aforesaid way can also be combined.Filling box 3 also both can be the mode as shown in Figure 4 multiple battery unit 10a being lined up 1 row, also can be the mode multiple battery unit 10a being lined up multiple row.In addition, filling box 3 can be both box-shaped as shown in Figure 4, also can be circular.When filling box 3 is circular, multiple battery unit 10a is arranged in order in the radial direction.

As mentioned above, from #1 fluid injection step to #4 fluid injection step, why the reservoir quantity of each step reduces gradually, this is because need to soak into into towards central portion further from the periphery of electrode group 21 ' along with fluid injection step goes on, the reservoir quantity that electrolyte 20 can soak into also tails off gradually.Therefore, in the fluid injection operation of above-mentioned present embodiment, with after specifying that reservoir quantity (electrolyte content of regulation) carries out fluid injection, sizable part of the central portion of the barrier film of electrode group 21 ' is also still in not yet fluid injection state ((a) → (b) → (d ') with reference to Fig. 5).On the other hand, in the fluid injection operation of the preferred mode of present embodiment, by implementing the 2nd fluid injection operation as next process after the 1st fluid injection operation of this operation, the time that regulation reservoir quantity (electrolyte content of regulation) has been soaked in fluid injection can be made significantly to shorten.And the fluid injection state of fluid injection completely substantially till can also being formed as the central portion of the barrier film of electrode group 21 ' after fluid injection.(contrast with reference to until Fig. 5 (a) → (b) → (c) → (d) state of soaking into and until Fig. 5 (a) → (b) → (d ') soak into state).

2nd fluid injection operation

In the preferred mode of present embodiment, as the 2nd fluid injection operation, after making to boost to the pressure higher than above-mentioned pressure (pressure forced down than air) in fluid injection chamber 2, this pressure (pressure after boosting) is kept Time constant and by the remainder fluid injection of the regulation reservoir quantity (electrolyte content of regulation) of above-mentioned electrolyte ((a) ~ (j), Fig. 6 with reference to Fig. 5).

Specifically, opened by the valve 6a of control part 7 by gas introduction tube line 6, in fluid injection chamber 2, import gas, boost to the pressure higher than the above-mentioned pressure (pressure than air forces down) in fluid injection chamber 2.By carrying out this operation, what the interarea 21a side of electrode group 21 ' became (c) of Fig. 5 from the state of soaking into of (b) of Fig. 5 soaks into state, can't see large change.Can say that this is: owing to not having fluid injection electrolyte 20 during this period, so be not impregnated into the electrolyte content needed for central portion, the state of soaking into of barrier film is also that central portion still keeps white constant, can not produce large change.

After boosting to the pressure higher than above-mentioned pressure (pressure forced down than air), close the valve 6a of gas introduction tube line 6 and this pressure (pressure after boosting) is kept Time constant.During this period, via the peristome 29a of the upper section of packaging body 29, marginally several times (among (a) ~ (js), Fig. 6 of Fig. 5 divide 3 time) fluid injection by fluid injection nozzle 4b by each for the remainder of the regulation reservoir quantity (electrolyte content of regulation) of electrolyte 20 from electrolyte supply pipeline 4.Specifically, as shown in the fluid injection curve of (a) ~ (j) of Fig. 5, Fig. 6, known: by specify the electrolyte 20 of reservoir quantity (electrolyte content of regulation) be about 40% remainder fluid injection.Through this operation, electrolyte 20 can be made to be impregnated into the central portion of the interarea 21a side of electrode group 21 '.In addition, by reservoir quantity (electrolyte content of regulation) all fluid injections will be specified, the state that liquid level becomes more top than the upper surface of electrode group 21 ' will be injected into.In addition, even if if will specify that reservoir quantity (electrolyte content of regulation) all fluid injections, liquid level are also than the upper surface state on the lower of electrode group 21 ', it is then the state of fluid injection deficiency, in charge and discharge process, a part for electrode, a part for barrier film can become drying regime, likely cause battery performance to reduce.Can think that its reason is: because a part for electrolyte is dispersed in injection process, can not by desired electrolyte content fluid injection in battery unit 10a etc.Therefore, in this case, the fluid injection by carrying out electrolyte 20 is further injected into liquid level, and to become the state more top than the upper surface of electrode group 21 ' ideal.

As shown in (d) of Fig. 5, known: at the time point that this operation is complete, electrolyte 20 has been impregnated into the central portion of the interarea 21a side of electrode group 21 ', and the state of soaking into of barrier film also only has a part for central portion to be still white, can fully soak into.Its reason is: although make that the pressure in fluid injection chamber 2 is instantaneous rises to the pressure higher than above-mentioned pressure owing to importing gas, the inside of electrode group 21 ' is still be evacuated and post-decompression state.Therefore, pressure differential is produced between in the inside and fluid injection chamber 2 of the electrode group 21 ' of battery unit 10a.Namely, inside due to electrode group 21 ' is higher vacuum state (decompression state), so by (dividing 3 times) fluid injection marginally several times in (a) ~ (j), Fig. 6 of Fig. 5 by each for electrolyte 20, electrolyte will be impregnated into rapidly the central portion (being inhaled into) of electrode group 21 ' under the effect of this negative pressure.Its result, the impregnability of electrolyte improves, and can shorten the fluid injection time.On the other hand, known: the decompression state when maintenance the 1st fluid injection operation constant and do not boost to the pressure higher than this pressure but electrolyte 20 (is always divided into 7 times in (a) ~ (j) at Fig. 5) at every turn marginally several times fluid injection until the A point of the zone circle shown in (a) ~ (j) of Fig. 5, as the state of soaking into of (d ') of Fig. 5, almost be not in progress to soaking into of central portion, result remains at central portion larger not yet to soak into part.

In addition, when the amount of electrolyte 20 is not as amount required for cell coated with film 10, can further this operation be repeated as the operation marginally carrying out fluid injection several times at every turn.

In this operation, make the value of the half of vacuum pressure when keeping pressure ratio the 1st fluid injection operation of Time constant in fluid injection chamber 2 and atmospheric pressure sum low ideal ((a) ~ (j) and Fig. 6 with reference to Fig. 5).That is, the value due to the half than vacuum pressure during the 1st fluid injection operation and atmospheric pressure sum is low, so can not be excessive with the pressure differential of the pressure (pressure than air forces down) during the 1st fluid injection operation, can prevent electrolyte from dispersing ((a) with reference to Fig. 7).But, in contrast, even if too small with the pressure differential of pressure (pressure than air forces down) before, also likely can not obtain sufficient impregnability and improve effect as (d ') of Fig. 5, therefore, specifically, can say and arrange that to be at least the pressure differential of more than 1kPa ideal, the pressure differential of more than 10kPa is preferably set, the pressure differential of about 15kPa ~ 20kPa is preferably set further.But, the preferred mode of present embodiment is not by any restriction of this scope.

In addition, in this operation, raise with also can making the pressure stage property in fluid injection chamber 2, while by the maintain constant pressure time and by electrolyte 20 fluid injection in each stage.In this case, above-mentioned pressure condition is alternatively met more desirable.By carrying out this operation, there is following advantage: periodically can promote to soak into (speed), the fluid injection time can be shortened.Although not shown, this operational example is as also carried out as follows: the mode making the pressure in fluid injection chamber 2 such as play (1) 15kPa → (2) 20kPa → (3) 25kPa with the pressure of the past operation periodically raises, while by the maintain constant pressure time and by electrolyte 20 fluid injection in each stage.Such as, at this, in above-mentioned (1) stage, by the pressure hold time TA of 15kPa, during this period by each for electrolyte 20 marginally fluid injection at twice, in the time TB shorter than time TA, boost to the pressure in above-mentioned (2) stage afterwards.Equally, in above-mentioned (2) stage, by the pressure hold time TA of 20kPa, during this period by each for electrolyte 20 marginally fluid injection at twice, in time TB, boost to the pressure in above-mentioned (3) stage afterwards.Finally, in above-mentioned (3) stage, also can by the pressure hold time TA of 25kPa, during this period by each for electrolyte 20 marginally fluid injection at twice.But, the preferred mode of present embodiment is not by any restriction of above-mentioned example.By raising with making pressure stage property, can periodically promote to soak into (speed), for this viewpoint, can say: if make above-mentioned (3) stage (=and front operation between pressure differential maximum stage) in retention time and reservoir quantity (and fluid injection number of times) more than other stages, then more effective.

In addition, as shown in (a) ~ (j), Fig. 6 of Fig. 5, in the 1st fluid injection operation and these two operations of Ben 2 fluid injection operation, electrolyte (at every turn a small amount of) point is carried out fluid injection for several times, and makes the reservoir quantity of each time in this 2nd fluid injection operation much more ideal than the last reservoir quantity of the 1st fluid injection operation.By carrying out this operation, in last procedure and this operation, pressure changes, thus becomes to be easy to soak into electrolyte in this operation and correspondingly can increase reservoir quantity, can shorten the fluid injection time.This effect is as follows: the fluid injection finally stopping the electrolyte 20 undertaken by fluid injection nozzle 4b.Specifically, by control part 7, the drive motors of each pump 4c, valve 4d and fluid injection nozzle 4b is stopped.Can terminate the 2nd fluid injection operation thus, the preferred mode of method is soaked in the fluid injection that can realize the electrolyte of present embodiment.

As described above, soak in the preferred mode of method in the fluid injection of the electrolyte of present embodiment, owing to keeping Time constant at a higher pressure, soak into so pressure differential can be utilized to be promoted, the fluid injection time can be shortened.In addition, even if use soft laminated film as the encapsulating material of cell coated with film, also can not produce lax between lamination surface, barrier film generation fold when can also suppress injecting electrolytic solution.

operation after fluid injection operation

Reprocessing (1)

The feature of present embodiment is, as shown in (a) ~ (j), Fig. 6 of Fig. 5, as reprocessing (1), after above-mentioned fluid injection operation, before closed above-mentioned peristome, carry out adding decompression operation, that is, the exert pressure in fluid injection chamber is become higher than pressure during above-mentioned fluid injection operation, then reduce pressure.Afterwards, by carrying out making the pressure in fluid injection chamber 2 go up to atmospheric boosting operation after the closing step of having carried out closed peristome 29a, by injecting electrolytic solution, can obtain further by the cell coated with film 10 soaked into.Explanation adds decompression operation.

add decompression operation

Adding in decompression operation, after above-mentioned fluid injection operation, before closed peristome 29a, carry out adding decompression operation, that is, the exert pressure in fluid injection chamber 2 is become higher than pressure during above-mentioned fluid injection operation, then reduce pressure.Thus, due to after fluid injection, close before carry out adding decompression, so can promote to soak into.Owing to being carry out adding decompression after fluid injection, so have following advantage: electrolyte 20 is isolated film and keeps, also can not cause disperse even if carry out adding decompression.

Such as, as shown in (a) ~ (j), Fig. 6 of Fig. 5, after above-mentioned fluid injection operation before ((d), (d ') with reference to Fig. 5), closed peristome 29a, the exert pressure in fluid injection chamber 2 is become higher than pressure time above-mentioned fluid injection operation (comprising the 1st fluid injection operation and the 2nd fluid injection operation of above-mentioned preferred mode).This operation is carried out as follows: opened by the valve 6a of control part 7 by gas introduction tube line 6, gas is imported in fluid injection chamber 2, the pressure (boost phase with reference to (a) ~ (j) of Fig. 5, the T1 ~ T2 of Fig. 6) higher than pressure during above-mentioned fluid injection operation will be pressurized in fluid injection chamber 2.

In this operation, when pressurizeing, as shown in (a) ~ (j), Fig. 6 of Fig. 5, be pressurized to atmospheric pressure ideal.This is because: by being pressurized to atmospheric pressure, can obtain and fluid injection time pressure between larger pressure differential, can promote to soak into.In addition, owing to only need stop vacuumizing to go back up to atmospheric pressure, also there is the advantage of simple structure.By carrying out this operation, the interarea 21a side of electrode group 21 ' become (d ') of Fig. 5 → (e ') state of soaking into so that become Fig. 5 (d) → (e) soak into state, think to facilitate at central portion and soak into.In addition, when have employed the variation of above-mentioned fluid injection operation, as the state of soaking into of (e) of Fig. 5, the electrolyte 20 of institute's fluid injection has been impregnated into electrode group 21 ' inside, as shown in (a) ~ (j), Fig. 6 of Fig. 5, even if carry out pressurization (boosting) sharply, the electrolyte 20 soaked into also can not disperse, can go up to atmospheric pressure at short notice, can contribute to shortening fluid injection operation.

Until Fig. 5 (a) ~ (j) shown in the A point of zone circle be maintained in the constant state of the pressure that forces down than air under, after by electrolyte 20 fluid injection, the pressure in fluid injection chamber 2 is made to go back up to the atmospheric pressure of the B point of the zone circle shown in (a) ~ (j) of Fig. 5, in this case, what become (e ') of Fig. 5 soaks into state.Namely, known: from the state of soaking into of (d ') of Fig. 5 of the A point of the zone circle shown in (a) ~ (j) of Fig. 5, large change not to occur, fully do not promote that electrolyte 20 soaks into central portion, becomes and remains the larger result of not yet soaking into part at central portion.

And, as shown in (a) ~ (j), Fig. 6 of Fig. 5, when pressurizeing, by ideal for the maintain constant pressure time (keeping the atmospheric stage in during the TC of (a) ~ (j) of Fig. 5, the T2 ~ T3 of Fig. 6).By when pressurizeing by the maintain constant pressure time, can promote to soak into.By carrying out this operation, what the interarea 21a side of electrode group 21 ' became (f) of Fig. 5 from the state of soaking into of (e) of Fig. 5, (e ') soaks into state, thinks and facilitates electrolyte soaking at central portion significantly.This can be described as: due to pressurized in electrode group during this period 21 ', thus can obtain and fluid injection time pressure between larger pressure differential, the electrolyte 20 facilitating institute's fluid injection significantly soaks into central portion.

In this operation, after carrying out above-mentioned pressurization, then the pressure in fluid injection chamber 2 is reduced pressure.When reducing pressure, reduce pressure fluid injection than above-mentioned fluid injection operation (comprising the 1st fluid injection operation and the 2nd fluid injection operation of above-mentioned preferred mode) time the lower pressure of pressure ideal.This operation is carried out as follows: by control part 7, drives the vacuum pump 5b of exhaust line 5 under the state opening valve 5a, makes decompression in fluid injection chamber 2 (preferably decompression is to the lower pressure of pressure during fluid injection than above-mentioned fluid injection operation).Be valve-off 5a after reaching the vacuum degree of regulation.In this operation, owing to reducing pressure again after being pressurized, and owing to preferably reducing pressure into the pressure lower than pressure during fluid injection after being pressurized again, so have following advantage: electrolyte 20 can be made than condensing further during fluid injection and permeate further.Now, known: as the state of soaking into of (g) of Fig. 5, make electrolyte 20 condensing and permeate (soaking into) further to electrode group 21 ' inside, promoting that electrolyte 20 is impregnated into the central portion of barrier film, the still unsoaked white portion of central portion is reduced further.In addition, as shown in (a) ~ (j) of Fig. 5, even if sharply decompression is to the pressure lower than pressure during fluid injection, also soaked into electrolyte 20 can be suppressed to seethe with excitement, therefore, both electrolyte can not have been caused to disperse, can reduce pressure at short notice again, by present embodiment adding decompression operation can contribute to significantly shorten after fluid injection electrolyte, make electrolyte soak into the required time.

In addition, in this operation, it is preferable that: pressurize and decompression time, respectively by the maintain constant pressure time, and the retention time of pressure when making pressurization is longer than the retention time of pressure during decompression.Its reason is: make to soak into progress due to during pressurization, thus by making this pressurization time retention time of pressure longer, can promote to soak into.Specifically, as shown in (a) ~ (j), Fig. 6 of Fig. 5, known: when pressurizeing, keeping atmospheric pressure in during the TC of T2 ~ T3, when reducing pressure, in during this TD shorter than TC of T4 ~ T5, keeping the pressure lower than pressure during fluid injection.Pressure hold time during pressurization is longer than pressure hold time during decompression.

And, in this operation, the circulation of repeatedly pressurizeing and reducing pressure ideal (representing the example having carried out 3 circulations in (a) ~ (j), Fig. 6 of Fig. 5).Owing to carrying out multiple circulation, so can promote further to soak into.Specifically, known: by from (e) of the Fig. 5 during pressurization of the 1st circulation, keep (f) of the Fig. 5 after Time constant, the 1st circulation decompression time (g) of Fig. 5, the 2nd circulation pressurization time (h) of Fig. 5, the 3rd circulation pressurization time Fig. 5 state of respectively soaking into (i) carry out multiple circulation, can more promote soaking into of electrolyte.

In the process operations of above-mentioned reprocessing (1), after reducing pressure operation in above-mentioned adding, carry out following closing step, boosting operation successively, (production) fluid injection can be obtained and soak into the cell coated with film 10 having electrolyte.In addition, in reprocessing (1), under the state not being the pressure after fluid injection, but under the state keeping the pressure added after decompression operation, or under the state having arrived lower pressure (high vacuum state) that reduces pressure in the scope that electrolyte does not seethe with excitement, peristome 29a is closed (sealing, sealing) by thermal welding.Afterwards, the battery unit that boosting just can obtain the state of soaking into becoming (j) of Fig. 5 from the state of soaking into (i) of Fig. 5 is carried out.

closing step

In closing step, above-mentioned add decompression operation after, keeping under the state that this pressure is constant (pressure of the time point of the C of the zone circle of (a) ~ (j) of Fig. 5), or in the scope that electrolyte does not seethe with excitement under decompression to the state of lower pressure (high vacuum state), peristome 29a is closed (sealing, sealing) by thermal welding.In the latter case, by control part 7, under the state opened by valve 5a, drive the vacuum pump 5b of exhaust line 5 and in the scope that electrolyte does not seethe with excitement, lower pressure (high vacuum state) is arrived in decompression in fluid injection chamber 2.Be valve-off 5a after reaching the vacuum degree of regulation.Next, use thermo-compressed (welding) parts (not shown) be located in fluid injection chamber 2, peristome 29a is closed (sealing, sealing) by thermal welding.

But, when first charge-discharge afterwards (particularly during initial charge), have this distinctive phenomenon of gas that generation is many in cell coated with film 10, just find hardly when the 2nd later discharge and recharge to produce such gas.Therefore, in this closing step, carry out thermal welding in the mode retaining a part for peristome and close, and placing ideal after using the dismounting closure members freely such as suitable clip that retained peristome closed (temporary enclosed) is become opening and closing state freely.And, pull down the closure members such as this clip carried out first charge-discharge in rear operation after and make retained peristome opening, by after many air scavenge of producing in cell coated with film 10 to cell coated with film 10 outside (such as, after decompression is removed), by thermal welding the most at last this peristome reliably to close (sealing, sealing) ideal.

boosting operation

After closing step, by carrying out making the pressure in fluid injection chamber 2 go up to atmospheric boosting operation, (production) fluid injection can be obtained and soak into the cell coated with film 10 having electrolyte 20.Specifically, by control part 7, the valve 6a of gas introduction tube line 6 is opened, in fluid injection chamber 2, imports gas, the pressure in fluid injection chamber 2 is gone up to atmospheric pressure.Thereby, it is possible to method is soaked in the fluid injection completing the electrolyte 20 utilizing the fluid injection soakage device 1 of present embodiment to carry out.By carrying out this operation, what the interarea 21a side of electrode group 21 ' became (j) of Fig. 5 from the state of soaking into (i) of Fig. 5 soaks into state, but two kinds of states of soaking into all facilitate soaks into until central portion, so the state of soaking into of barrier film is also find white portion hardly at central portion, the state of soaking into of barrier film is also that central portion still keeps white constant, can say and large change does not occur.

Reprocessing (3)

And, in the present embodiment, as shown in (a) ~ (j), Fig. 6 of Fig. 5, as reprocessing (3), also can carry out the decompression operation after the pressure in fluid injection chamber 2 to the fluid injection of the pressure lower than pressure during above-mentioned fluid injection operation after above-mentioned fluid injection operation.Afterwards, carry out as required same with reprocessing (1) adding decompression operation, carry out the closing step same with reprocessing (1), operation of boosting, also can obtain thus further by the cell coated with film 10 soaked into.

decompression operation after fluid injection

In decompression operation after fluid injection, after above-mentioned fluid injection operation (comprising above-mentioned preferred mode), by the pressure in fluid injection chamber 2 to the pressure lower than pressure during above-mentioned fluid injection operation.Due to by the pressure in fluid injection chamber 2 to the pressure lower than pressure during fluid injection, electrolyte can be made than condensing further during fluid injection and advantage that is that permeate further so have.Specifically, as represented with hollow thick arrow in (a) ~ (j) of Fig. 5, it is ideal that the pressure (peak suction after fluid injection) in (g) of Fig. 5 is depressurized to the pressure lower than the pressure (peak suction during fluid injection) in (b) of Fig. 5.In (a) ~ (j) of Fig. 5, both from (d ') of Fig. 5 to (g) of Fig. 5 decompression to the pressure lower than pressure during fluid injection operation, also can reduce pressure to the pressure lower than pressure during fluid injection operation from (d) of Fig. 5 to (g) of Fig. 5.Preferably from (g) decompression of (f) → Fig. 5 of (e) of (d) of Fig. 5 or (d ') → Fig. 5 or (e ') → Fig. 5 to the pressure lower than pressure during fluid injection operation.Particularly preferably utilize through fluid injection operation variation, (g) this solid line route of (f) → Fig. 5 of (e) → Fig. 5 of (d) → Fig. 5 of Fig. 5 reduces pressure the pressure lower than the pressure of fluid injection operation.

In this operation, the pressure in above-mentioned fluid injection operation (comprising above-mentioned preferred mode) is set to the pressure that the air hindering electrolyte to soak into above-mentioned electrode group can not be caused to expand and the pressure in the decompression operation after above-mentioned fluid injection to be set to the pressure that electrolyte can not seethe with excitement ideal.Its reason is: before fluid injection is complete, air residual in electrode group 21 ' is more, if so excessively decompression will produce foam, soak into and can not be in progress ((b) with reference to Fig. 7), therefore, the pressure considering this point is set to, after fluid injection is complete, be set to the pressure considering and the boiling point of electrolyte can not be made to become processing temperature, instead of to consider be the pressure of residual air.In addition, as the pressure hindering the air that soaks into of electrolyte to expand can not be caused, as shown in (a) of Fig. 7, as long as suppress foam to produce, make electrolyte soak into the pressure that can carry out.When exceeding this pressure, can regard as shown in (b) of Fig. 7, produce foam tempestuously, the situations such as electrolyte disperses occur and causes the pressure that the air hindering electrolyte to soak into expands.In addition, the temperature in the fluid injection chamber from injection process after fluid injection, without the need to managing especially, can be implemented under room temperature (roughly the scope of 0 DEG C ~ 40 DEG C) state.Therefore, the pressure (high vacuum state) of what is called considers the processing temperature after fluid injection to be the pressure of the processing temperature of the boiling point being no more than electrolyte also can the be C of the zone circle of Fig. 5 (a) ~ (j).Known: under the state of soaking into of (g) of Fig. 5 of the time point of the C of the zone circle of (a) ~ (j) of Fig. 5, also not find the boiling of electrolyte, meet above-mentioned necessary condition.That is, can say: as long as the pressure be pressed onto from air in the scope of peak suction (pressure during decompression after the fluid injection such as C of the zone circle of (a) ~ (j) of Fig. 5) shown in (a) of Fig. 5 ~ (j), Fig. 6, just meet above-mentioned necessary condition.

In addition, in this operation, as shown in (a) ~ (j), Fig. 6 of Fig. 5, after above-mentioned fluid injection operation, carry out this operation before, the pressure in fluid injection chamber 2 can be pressurized in advance.Atmospheric pressure is pressurized to ideal when pressurizeing.This is because: owing to being pressurized to atmospheric pressure, so can obtain and fluid injection time pressure between larger pressure differential, can promote to soak into.In addition, also because only need stop vacuumizing, so structure is simple to go back up to atmospheric pressure.By carrying out this operation, when pressurizeing after preferred fluid injection operation, what the interarea 21a side of electrode group 21 ' became (e) of Fig. 5 from the state of soaking into of (d) of Fig. 5 soaks into state, thinks to facilitate at central portion to soak into.This can be described as: because electrode group 21 ' is interior pressurized during this period, so can obtain the larger pressure differential between the pressure of fluid injection, the electrolyte 20 facilitating institute's fluid injection soaks into central portion.In addition, as (e) of Fig. 5, it is inner that electrolyte 20 after fluid injection has been impregnated into electrode group 21 ', as shown in (a) ~ (j), Fig. 6 of Fig. 5, even if pressurize (boosting) sharp, the electrolyte 20 soaked into also can not disperse, and can go up to atmospheric pressure at short notice, can contribute to shortening fluid injection operation.

And, as shown in (a) ~ (j), Fig. 6 of Fig. 5, after fluid injection operation during pressurization (boosting) in advance, by ideal for the maintain constant pressure time (the maintenance atmospheric stage during the TC of reference (a) ~ (j) of Fig. 5, the T2 ~ T3 of Fig. 6).When pressurizeing, by by the maintain constant pressure time, can promote to soak into.By carrying out this operation, what the interarea 21a side of electrode group 21 ' became (f) of (e ') → Fig. 5 of (e) of Fig. 5 or Fig. 5 soaks into state, thinks to facilitate at central portion to soak into.This can be described as: due to pressurized in electrode group during this period 21 ', thus can obtain and fluid injection time pressure between larger pressure differential, the electrolyte 20 facilitating institute's fluid injection soaks into central portion.

In decompression operation after fluid injection in the present embodiment, after pressurizeing as required as described above, by the pressure in fluid injection chamber 2 to the pressure lower than pressure during above-mentioned fluid injection operation.But, self-evident, after fluid injection, also can not pressurize, but by the pressure in fluid injection chamber to the pressure lower than pressure during above-mentioned fluid injection operation.

the improvement of the fluid injection of electrolyte

Next, method is soaked in the fluid injection of the electrolyte 20 using Fig. 4 to be described in present embodiment.Electrolyte 20 has been impregnated into cell device 21 from the 21b side, stacked side of electrode group 21 '.The cell device 21 of rectangular shape has 4 stacked side 21b, makes laminated film packaging body 29 produce fold, importantly: effectively utilize the fluid injection that all above-mentioned 4 stacked side 21b carry out electrolyte 20 from the viewpoint of shortening fluid injection time and preventing.Therefore, also can make fluid injection nozzle 4b fluid injection as follows: often carry out 1 fluid injection, just march to the other end from one end of peristome 29, while make the electrolyte 20 of ormal weight distribute equably to the other end from one end of peristome 29.Fluid injection can also be carried out as follows: use top can from immediately below to tilt to the left and right top about 45 ° (movably) fluid injection nozzle 4b, the electrolyte 20 of ormal weight just can be made to carry out fluid injection in the mode distributed equably from one end of peristome 29 to the other end often to carry out 1 fluid injection.But, present embodiment, by any restriction of above-mentioned example, can suitably be selected the existing fluid injection of fluid injection equably can soak into method.

As described above, adopt the manufacture method of cell coated with film of present embodiment and device thereof, especially soak into method and the device thereof of electrolyte to the fluid injection of cell coated with film unit, following action effect can be obtained.(1) due to after fluid injection, close before, be pressurized to the pressure higher than pressure during fluid injection, then reduce pressure, so can promote that electrolyte soaks into significantly.In addition, owing to being carry out plus-minus pressure after fluid injection, keeping so electrolyte is isolated film, even if carry out adding decompression, also can not cause and disperse.In addition, (2) when carrying out above-mentioned pressurization, by being pressurized to atmospheric pressure, can obtain and fluid injection time pressure between larger pressure differential, can promote to soak into.Owing to only need stop vacuumizing, so structure is simple to go back up to atmospheric pressure.(3) when reducing pressure, because decompression is to the pressure (inlet side) lower than pressure during fluid injection, so electrolyte can be made than condensing further during fluid injection and permeate further.(4) above-mentioned pressurization and decompression time by the maintain constant pressure time, and the retention time of pressure when making pressurization is longer than the retention time of decompression, soak into be in progress due to during pressurization, thus by making pressurization time retention time of pressure longer, can promote to soak into.(5) circulation by repeatedly pressurizeing and reducing pressure, can promote to soak into further.

description of reference numerals

1, the fluid injection soakage device of electrolyte; 2, fluid injection chamber; 3, filling box; 3a, pressing fixture; 4, electrolyte supply pipeline; The container of 4a, electrolyte; 4b, fluid injection nozzle; Electrolyte supply pump on 4c, electrolyte supply pipeline; Opening and closing valve on 4d, electrolyte supply pipeline or fluid flow adjustment valve; 5, exhaust line; Opening and closing valve is used in 5a, exhaust; The vacuum pump of 5b, exhaust; 6, gas introduction tube line; Opening and closing valve on 6a, gas introduction tube line or gas flow adjustment valve; The container of 6b, gas; 7, control part; 10, cell coated with film (thin-film package electric device); 10a, cell coated with film unit; 11, negative electrode collector; 11a, negative pole (coming from collector body) epitaxy part; 11b, negative pole curren-collecting part; 12, positive electrode collector; 12a, positive pole (coming from collector body) epitaxy part; 12b, positive pole curren-collecting part; 13, negative electrode active material layer; 14, negative plate (=negative pole); 15, positive electrode active material layer; 16, positive plate (=positive pole); 17, dielectric substrate (soaking into the barrier film having electrolyte); 19, monocell layer; 20, electrolyte; 21, cell device; The interarea of 21a, cell device; The stacked side of 21b, cell device; 25, negative tab; 27, positive tab; 29, laminated film packaging body; The peristome of 29a, laminated film packaging body; The bottom of 29b, laminated film packaging body; The recess of 29e, laminated film packaging body; The closure of 29f, laminated film packaging body or mouth-sealed portion.

Claims

1. a manufacture method for thin-film package electric device, wherein,

The manufacture method of this thin-film package electric device comprises following operation:

Decompression operation, by be provided with bag-shaped laminated film packaging body fluid injection chamber in decompression to the pressure forced down than air, this bag-shaped laminated film packaging body has peristome, and is accommodated with electrode group, and this electrode group has and clips the positive pole and negative pole that separating film layer gathers into folds;

Fluid injection operation, after above-mentioned decompression operation, by the electrolyte of regulation reservoir quantity from above-mentioned peristome to fluid injection in packaging body;

Add decompression operation, after above-mentioned fluid injection operation, close before above-mentioned peristome, by the exert pressure in fluid injection chamber to higher than pressure during above-mentioned fluid injection operation, then reduce pressure, the pressure that the pressure when fluid injection than fluid injection operation is arrived in decompression is low.

2. the manufacture method of thin-film package electric device according to claim 1, is characterized in that,

Adding in decompression operation above-mentioned, when pressurizeing, being pressurized to atmospheric pressure.

3. the manufacture method of thin-film package electric device according to claim 1, is characterized in that,

Add in decompression operation above-mentioned, when pressurizeing by the maintain constant pressure time, when reducing pressure by the maintain constant pressure time, the retention time of pressure during pressurization is longer than the retention time of pressure during decompression.

4. the manufacture method of thin-film package electric device according to claim 2, is characterized in that,

5., according to the manufacture method of the thin-film package electric device in Claims 1 to 4 described in wantonly 1, it is characterized in that,

Add in decompression operation above-mentioned, repeatedly carry out the circulation of pressurizeing and reducing pressure.

6., according to the manufacture method of the thin-film package electric device in Claims 1 to 4 described in wantonly 1, it is characterized in that,

In above-mentioned fluid injection operation, by under being maintained in the constant state of post-decompression pressure in fluid injection chamber, by the electrolyte of regulation reservoir quantity at least partially from above-mentioned peristome to fluid injection in packaging body.

7. the manufacture method of thin-film package electric device according to claim 5, is characterized in that,

8. a manufacturing installation for thin-film package electric device, is characterized in that,

The manufacturing installation of this thin-film package electric device has:

Pressure adjusting parts, it is for adjusting the pressure be provided with in the fluid injection chamber of bag-shaped laminated film packaging body, this bag-shaped laminated film packaging body has peristome, and is accommodated with electrode group, and this electrode group has and clips the positive pole and negative pole that separating film layer gathers into folds;

Fluid injection parts, it is for being injected in packaging body by electrolyte from above-mentioned peristome;

Control assembly, it controls as follows: utilize above-mentioned pressure adjusting parts to make to reduce pressure to the pressure forced down than air in fluid injection chamber, after decompression, above-mentioned fluid injection parts are utilized to make the electrolyte of regulation reservoir quantity to fluid injection in packaging body, afterwards, before closing above-mentioned peristome, above-mentioned pressure adjusting parts are utilized by the exert pressure in fluid injection chamber to higher than pressure during above-mentioned fluid injection, reduce pressure again, the pressure that pressure when carrying out fluid injection than above-mentioned fluid injection parts that reduces pressure is low.