JP5475700B2

JP5475700B2 - Liquid supply method and apparatus

Info

Publication number: JP5475700B2
Application number: JP2011021701A
Authority: JP
Inventors: 敏男武石
Original assignee: Koganei Corp
Current assignee: Koganei Corp
Priority date: 2011-02-03
Filing date: 2011-02-03
Publication date: 2014-04-16
Anticipated expiration: 2031-02-03
Also published as: KR101418529B1; KR20130110217A; WO2012105091A1; JP2012162269A

Description

本発明は内部を負圧状態とした容器内に液体を供給するために使用する液体供給技術に関する。 The present invention relates to a liquid supply technique used for supplying liquid into a container having a negative pressure inside.

筒型や角型のケース等の容器の内部に液体を注入するときに、液体注入前に容器の内部を負圧にし、ついで液体を注入し、所定時間経過後に容器内部を大気圧に転じている。これによって、容器の内部に気体を残留させることなく液体を容器内に確実に充填させることができる。例えば、電解液を用いる二次電池を製造するときには、正負の電極と両電極間に配置されるセパレータとが電池容器の内部に組み込まれた状態のもとで、電池容器の内部に電解液を充填している。セパレータは微細な孔が多数形成された多孔質の薄膜層であり、この薄膜層に電解液を浸透させるには、電池容器の内部を大気圧以下の真空圧力つまり負圧状態として微細孔の内部から空気を除去しておく必要がある。 When injecting liquid into a container such as a cylindrical or square case, make the inside of the container negative before injecting the liquid, and then inject the liquid. Yes. As a result, the liquid can be reliably filled into the container without causing gas to remain in the container. For example, when manufacturing a secondary battery using an electrolytic solution, the electrolytic solution is placed inside the battery container in a state where positive and negative electrodes and a separator disposed between both electrodes are incorporated into the battery container. Filled. The separator is a porous thin film layer in which a large number of fine pores are formed, and in order to infiltrate the electrolyte into the thin film layer, the inside of the battery vessel is set to a vacuum pressure of atmospheric pressure or lower, that is, a negative pressure state. It is necessary to remove air from.

電池容器の内部に電解液を注入するために、例えば、特許文献１に記載されるような電解液注入装置が使用されている。この電解液注入装置は、電池容器を収容する密閉チャンバーと、密閉チャンバー内に供給される電解液を貯溜するシリンダとを有しており、シリンダには電解液を吐出するためのピストンが設けられている。電池容器内に電解液を注入するには、電池容器を密閉チャンバー内に密閉収容し、真空ポンプにより密閉チャンバー内つまり電池容器内を負圧にした状態のもとで、ピストンにより電解液をシリンダ内からノズルに吐出して、ノズルから電池容器内に電解液が供給される。 In order to inject the electrolyte into the battery container, for example, an electrolyte injecting device as described in Patent Document 1 is used. This electrolyte solution injection device has a sealed chamber for storing a battery container and a cylinder for storing the electrolyte solution supplied into the sealed chamber, and the cylinder is provided with a piston for discharging the electrolyte solution. ing. In order to inject the electrolyte into the battery container, the battery container is hermetically accommodated in a sealed chamber, and the electrolyte is cylinderized by a piston in a state in which the inside of the sealed chamber, that is, the battery container is negatively charged by a vacuum pump. It discharges from the inside to the nozzle, and the electrolytic solution is supplied from the nozzle into the battery container.

一方、特許文献２には、電池容器を収容する密閉チャンバーと電解液を収容する電解液貯溜部とを開閉バルブが設けられた配管により接続するようにした電解液注入装置が記載されている。電池容器内に電解液を注入するには、電池容器を密閉チャンバー内に密閉収容し、真空ポンプにより密閉チャンバー内つまり電池容器内を負圧にした状態のもとで開閉バルブを開放することにより、電解液貯溜部内の電解液をノズルから電池容器に供給するようにしている。 On the other hand, Patent Document 2 describes an electrolyte injection device in which a sealed chamber for storing a battery container and an electrolyte storage part for storing an electrolyte are connected by a pipe provided with an opening / closing valve. In order to inject electrolyte into the battery container, the battery container is hermetically housed in a sealed chamber, and the open / close valve is opened under a negative pressure in the sealed chamber, that is, in the battery container, by a vacuum pump. The electrolytic solution in the electrolytic solution reservoir is supplied from the nozzle to the battery container.

特開２００３−２１７５６６号公報JP 2003-217666 A 特開２００３−２１７５６７号公報JP 2003-217567 A

特許文献１に記載される注入装置のように、密閉チャンバー内で負圧状態となった電池容器内に、シリンダ内の電解液をピストンにより注入するようにすると、シリンダ内にも負圧が伝達されることになる。このため、ピストンが負圧によって密閉チャンバー部の方向へ引かれ、ピストンは油圧ピストン軸で駆動されたストロークよりも長いストロークを移動してしまう可能性がある。つまり、電解液の吐出量は油圧ピストン軸で駆動されたストロークに対応しないので、電解液の注入量の精度を高めることができない。 As in the injection device described in Patent Document 1, if the electrolyte in the cylinder is injected into the battery container that is in a negative pressure state in the sealed chamber by the piston, the negative pressure is also transmitted into the cylinder. Will be. For this reason, there is a possibility that the piston is pulled in the direction of the sealed chamber portion by the negative pressure, and the piston moves a stroke longer than the stroke driven by the hydraulic piston shaft. That is, since the discharge amount of the electrolytic solution does not correspond to the stroke driven by the hydraulic piston shaft, the accuracy of the injection amount of the electrolytic solution cannot be increased.

一方、特許文献２に記載される注入装置のように、電解液貯溜部内の電解液を電池容器に注入するようにすると、注入量は予め電解液貯溜部内に供給された電解液の量によって設定されることになり、電解液の注入精度を高めることができない。 On the other hand, when the electrolytic solution in the electrolytic solution storage part is injected into the battery container as in the injection device described in Patent Document 2, the injection amount is set according to the amount of the electrolytic solution supplied into the electrolytic solution storage part in advance. As a result, the accuracy of electrolyte injection cannot be increased.

本発明の目的は、負圧雰囲気内にある容器等の被注入物の内部への液体の注入精度を高めることにある。 An object of the present invention is to improve the accuracy of liquid injection into an object to be injected such as a container in a negative pressure atmosphere.

本発明の液体供給方法は、液体を収容する液体収容タンクに接続される一次側配管と液体を被注入物に注入する吐出ノズルに接続される二次側配管とに連通するポンプ室を有し、当該ポンプ室を膨張させて前記液体収容タンク内の液体を前記ポンプ室に吸入し、前記ポンプ室を収縮させて液体を吐出ノズルから吐出するポンプ駆動部材が設けられた液体供給ポンプを用いて、負圧雰囲気に保持された前記被注入物に液体を供給する液体供給方法であって、前記一次側配管に設けられた一次側開閉弁により前記一次側配管の流路を開放し、前記二次側配管に設けられた二次側開閉弁により前記二次側配管の流路を閉塞した状態のもとで前記ポンプ室を膨張させて前記ポンプ室内に液体を吸入する吸入工程と、前記一次側配管の流路を前記一次側開閉弁により閉塞し、前記二次側配管の流路を前記二次側開閉弁により開放した状態のもとで、前記二次側開閉弁から前記吐出ノズルの先端までの間に設けられた絞り部により負圧が前記ポンプ室に伝達されるのを防止しながら、前記ポンプ室を収縮させて前記ポンプ室内の液体を前記吐出ノズルから前記被注入物に注入供給する注入工程とを有し、前記被注入物内への液体注入開始時に、前記二次側開閉弁の開放動作を前記ポンプ駆動部材の駆動開始よりも遅延させることを特徴とする。本発明の液体供給方法は、前記被注入物内への液体注入停止時に、前記二次側開閉弁の閉塞動作を前記ポンプ駆動部材の駆動停止よりも早めることを特徴とする。本発明の液体供給方法は、液体を収容する液体収容タンクに接続される一次側配管と液体を被注入物に注入する吐出ノズルに接続される二次側配管とに連通するポンプ室を有し、当該ポンプ室を膨張させて前記液体収容タンク内の液体を前記ポンプ室に吸入し、前記ポンプ室を収縮させて液体を吐出ノズルから吐出するポンプ駆動部材が設けられた液体供給ポンプを用いて、負圧雰囲気に保持された前記被注入物に液体を供給する液体供給方法であって、前記一次側配管に設けられた一次側開閉弁により前記一次側配管の流路を開放し、前記二次側配管に設けられた二次側開閉弁により前記二次側配管の流路を閉塞した状態のもとで前記ポンプ室を膨張させて前記ポンプ室内に液体を吸入する吸入工程と、前記一次側配管の流路を前記一次側開閉弁により閉塞し、前記二次側配管の流路を前記二次側開閉弁により開放した状態のもとで、前記二次側開閉弁から前記吐出ノズルの先端までの間に設けられた絞り部により負圧が前記ポンプ室に伝達されるのを防止しながら、前記ポンプ室を収縮させて前記ポンプ室内の液体を前記吐出ノズルから前記被注入物に注入供給する注入工程とを有し、前記被注入物内への液体注入停止時に、前記二次側開閉弁の閉塞動作を前記ポンプ駆動部材の駆動停止よりも早めることを特徴とする。 The liquid supply method of the present invention includes a pump chamber that communicates with a primary side pipe connected to a liquid storage tank that contains a liquid and a secondary side pipe connected to a discharge nozzle that injects the liquid into an injection target. A liquid supply pump provided with a pump drive member that expands the pump chamber and sucks the liquid in the liquid storage tank into the pump chamber and contracts the pump chamber to discharge the liquid from the discharge nozzle. A liquid supply method for supplying a liquid to the injected material held in a negative pressure atmosphere, wherein a flow path of the primary side pipe is opened by a primary side on-off valve provided in the primary side pipe, A suction step of inflating the pump chamber and sucking liquid into the pump chamber under a state in which the flow path of the secondary side pipe is closed by a secondary side on-off valve provided in the secondary side pipe; The flow path of the side piping is the primary side A throttle provided between the secondary side on-off valve and the tip of the discharge nozzle in a state where the secondary side pipe is closed by the valve closing and the flow path of the secondary side pipe is opened by the secondary side on-off valve. while preventing the negative pressure is transmitted to the pump chamber by parts, possess the injection for supplying injection process the liquid in the pump chamber by contracting the pump chamber to said object implant from the discharge nozzle, The opening operation of the secondary side on-off valve is delayed from the start of driving of the pump driving member at the start of liquid injection into the injection target . Liquid supply method of the present invention, the at liquid stop infusion into the implant inside, characterized in that to accelerate the closing operation of the secondary side valve than the drive stop of the pump drive member. The liquid supply method of the present invention includes a pump chamber that communicates with a primary side pipe connected to a liquid storage tank that contains a liquid and a secondary side pipe connected to a discharge nozzle that injects the liquid into an injection target. A liquid supply pump provided with a pump drive member that expands the pump chamber and sucks the liquid in the liquid storage tank into the pump chamber and contracts the pump chamber to discharge the liquid from the discharge nozzle. A liquid supply method for supplying a liquid to the injected material held in a negative pressure atmosphere, wherein a flow path of the primary side pipe is opened by a primary side on-off valve provided in the primary side pipe, A suction step of inflating the pump chamber and sucking liquid into the pump chamber under a state in which the flow path of the secondary side pipe is closed by a secondary side on-off valve provided in the secondary side pipe; The flow path of the side piping is the primary side A throttle provided between the secondary side on-off valve and the tip of the discharge nozzle in a state where the secondary side pipe is closed by the valve closing and the flow path of the secondary side pipe is opened by the secondary side on-off valve. while preventing the negative pressure is transmitted to the pump chamber by parts, possess the injection for supplying injection process the liquid in the pump chamber by contracting the pump chamber to said object implant from the discharge nozzle, When the liquid injection into the injection target is stopped, the closing operation of the secondary side on-off valve is made earlier than the stop of driving of the pump driving member .

本発明の液体供給装置は、負圧雰囲気に保持された被注入物に液体を供給する液体供給装置であって、液体を収容する液体収容タンクに接続される一次側配管と液体を被注入物に注入する吐出ノズルに接続される二次側配管とに連通するポンプ室を有し、当該ポンプ室を膨張させて前記液体収容タンク内の液体を前記ポンプ室に吸入し、前記ポンプ室を収縮させて液体を吐出ノズルから吐出するポンプ駆動部材が設けられた液体供給ポンプと、前記一次側配管に設けられ、前記ポンプ室を膨張させる際に前記一次側配管の流路を開放する一方、前記ポンプ室を収縮させる際に前記一次側配管の流路を閉塞する一次側開閉弁と、前記二次側配管に設けられ、前記ポンプ室を膨張させる際に前記二次側配管の流路を閉塞する一方、前記ポンプ室を収縮させる際に前記二次側配管の流路を開放する二次側開閉弁と、前記二次側開閉弁から前記吐出ノズルの先端までの間に設けられ、前記ポンプ室を収縮させて液体を前記被注入物内に注入する過程のもとでは負圧が前記ポンプ室に伝達されるのを防止する絞り部とを有し、前記被注入物内への液体注入開始時に、前記二次側開閉弁の開放動作を前記ポンプ駆動部材の駆動開始よりも遅延させることを特徴とする。本発明の液体供給装置は、前記被注入物内への液体注入停止時に、前記二次側開閉弁の閉塞動作を前記ポンプ駆動部材の駆動停止よりも早めることを特徴とする。本発明の液体供給装置は、負圧雰囲気に保持された被注入物に液体を供給する液体供給装置であって、液体を収容する液体収容タンクに接続される一次側配管と液体を被注入物に注入する吐出ノズルに接続される二次側配管とに連通するポンプ室を有し、当該ポンプ室を膨張させて前記液体収容タンク内の液体を前記ポンプ室に吸入し、前記ポンプ室を収縮させて液体を吐出ノズルから吐出するポンプ駆動部材が設けられた液体供給ポンプと、前記一次側配管に設けられ、前記ポンプ室を膨張させる際に前記一次側配管の流路を開放する一方、前記ポンプ室を収縮させる際に前記一次側配管の流路を閉塞する一次側開閉弁と、前記二次側配管に設けられ、前記ポンプ室を膨張させる際に前記二次側配管の流路を閉塞する一方、前記ポンプ室を収縮させる際に前記二次側配管の流路を開放する二次側開閉弁と、前記二次側開閉弁から前記吐出ノズルの先端までの間に設けられ、前記ポンプ室を収縮させて液体を前記被注入物内に注入する過程のもとでは負圧が前記ポンプ室に伝達されるのを防止する絞り部とを有し、前記被注入物内への液体注入停止時に、前記二次側開閉弁の閉塞動作を前記ポンプ駆動部材の駆動停止よりも早めることを特徴とする。 A liquid supply apparatus according to the present invention is a liquid supply apparatus that supplies liquid to an injection object held in a negative pressure atmosphere, and includes a primary side pipe connected to a liquid storage tank that stores the liquid and the liquid to be injection object A pump chamber that communicates with a secondary side pipe connected to a discharge nozzle for injecting the liquid into the pump, expands the pump chamber, sucks the liquid in the liquid storage tank into the pump chamber, and contracts the pump chamber A liquid supply pump provided with a pump drive member for discharging liquid from a discharge nozzle, and provided in the primary side pipe, while opening the flow path of the primary side pipe when the pump chamber is expanded, A primary side on-off valve that closes the flow path of the primary side pipe when the pump chamber is contracted, and a secondary side pipe that is provided in the secondary side pipe and closes the flow path of the secondary side pipe when the pump chamber is expanded. While the pump chamber A secondary side switching valve for opening the flow path of the secondary pipe when causing condensation, in between the said secondary side switching valve to the tip of the discharge nozzle, the liquid is contracted to the pump chamber wherein under the process of injecting the object injectate within possess a throttle portion for preventing the negative pressure is transmitted to the pump chamber, said at the start liquid injection into the implant in the secondary side The opening operation of the on-off valve is delayed from the start of driving of the pump driving member . Liquid supply apparatus of the present invention, the at liquid stop infusion into the implant inside, characterized in that to accelerate the closing operation of the secondary side valve than the drive stop of the pump drive member. A liquid supply apparatus according to the present invention is a liquid supply apparatus that supplies liquid to an injection object held in a negative pressure atmosphere, and includes a primary side pipe connected to a liquid storage tank that stores the liquid and the liquid to be injection object A pump chamber that communicates with a secondary side pipe connected to a discharge nozzle for injecting the liquid into the pump, expands the pump chamber, sucks the liquid in the liquid storage tank into the pump chamber, and contracts the pump chamber A liquid supply pump provided with a pump drive member for discharging liquid from a discharge nozzle, and provided in the primary side pipe, while opening the flow path of the primary side pipe when the pump chamber is expanded, A primary side on-off valve that closes the flow path of the primary side pipe when the pump chamber is contracted, and a secondary side pipe that is provided in the secondary side pipe and closes the flow path of the secondary side pipe when the pump chamber is expanded. While the pump chamber A secondary side switching valve for opening the flow path of the secondary pipe when causing condensation, in between the said secondary side switching valve to the tip of the discharge nozzle, the liquid is contracted to the pump chamber wherein under the process of injecting the object injectate within possess a throttle portion for preventing the negative pressure is transmitted to the pump chamber, said at liquid stop infusion into the implant in the secondary side It is characterized in that the closing operation of the on-off valve is made earlier than the stop of driving of the pump driving member .

本発明の液体供給装置は、前記絞り部は前記吐出ノズルの内径を調節する可変絞りであることを特徴とする。本発明の液体供給装置は、前記二次側開閉弁は空気圧によりそれぞれの流路を開閉するエアオペレイトバルブであることを特徴とする。本発明の液体供給装置は、前記絞り部は前記吐出ノズルの流路の長さを調整する可変絞りであることを特徴とする。本発明の液体供給装置は、前記二次側開閉弁は電磁弁であることを特徴とする。本発明の液体供給装置は、前記一次側開閉弁と前記二次側開閉弁と前記ポンプ駆動部材を制御するコントローラを有することを特徴とする。 In the liquid supply apparatus of the present invention, the throttle portion is a variable throttle that adjusts an inner diameter of the discharge nozzle. In the liquid supply apparatus of the present invention, the secondary side on-off valve is an air operated valve that opens and closes each flow path by air pressure. The liquid supply apparatus of the present invention is characterized in that the throttle section is a variable throttle that adjusts the length of the flow path of the discharge nozzle. The liquid supply apparatus of the present invention is characterized in that the secondary side on-off valve is an electromagnetic valve. The liquid supply apparatus of the present invention includes a controller that controls the primary side on-off valve, the secondary side on-off valve, and the pump driving member.

本発明においては、二次側配管のうち二次側開閉弁から吐出ノズルの先端までの間に絞り部が設けられている。負圧雰囲気内にある容器などの被注入物に、二次側開閉弁を開放状態に切り換えて液体を注入する際には、負圧が二次側配管内の流路を介してポンプ室に伝達されることが、この絞り部によって防止される。これにより、吐出ノズルからの液体の吐出量は、負圧雰囲気内の負圧により影響を受けることがなくなり、ポンプ室を収縮させるためのポンプ駆動部材の移動ストロークのみによって決まることになる。したがって、被注入物内への液体の注入量の精度を高めることができる。さらに、負圧そのものが変動しても、注入量はその影響を受けなくなるという効果を有する。 In the present invention, the throttle part is provided between the secondary side opening / closing valve and the tip of the discharge nozzle in the secondary side piping. When injecting liquid into an injectable object such as a container in a negative pressure atmosphere by switching the secondary side open / close valve to the open state, negative pressure is applied to the pump chamber via the flow path in the secondary side pipe. Transmission is prevented by this throttle. Thereby, the discharge amount of the liquid from the discharge nozzle is not affected by the negative pressure in the negative pressure atmosphere, and is determined only by the moving stroke of the pump driving member for contracting the pump chamber. Therefore, the accuracy of the amount of liquid injected into the injection target can be increased. Furthermore, even if the negative pressure itself fluctuates, the injection amount is not affected by this.

被注入物内への液体注入開始時に、二次側開閉弁の開放動作をポンプ駆動部材の駆動開始よりも遅延させると、注入量精度をより高めることができる。また、被注入物内への液体注入停止時に、二次側開閉弁の閉塞動作をポンプ駆動部材の駆動停止よりも早めると、注入精度をより高めることができる。 If the opening operation of the secondary side opening / closing valve is delayed from the start of driving of the pump drive member at the start of liquid injection into the injection target, the injection amount accuracy can be further increased. In addition, when the liquid injection into the injection target is stopped, if the closing operation of the secondary side opening / closing valve is made earlier than the stop of driving of the pump driving member, the injection accuracy can be further improved.

本発明の一実施の形態である液体供給装置を示す断面図である。It is sectional drawing which shows the liquid supply apparatus which is one embodiment of this invention. 液体供給装置の駆動制御回路を示すブロック図である。It is a block diagram which shows the drive control circuit of a liquid supply apparatus. 図１に示す液体供給装置のポンプ吐出動作とポンプ吸入動作を示すタイムチャートである。It is a time chart which shows the pump discharge operation | movement and pump suction operation | movement of the liquid supply apparatus shown in FIG. 比較例として示す液体供給装置におけるポンプ吐出動作とポンプ吸入動作を示すタイムチャートである。It is a time chart which shows the pump discharge operation | movement and pump suction operation | movement in the liquid supply apparatus shown as a comparative example. 他の比較例として示す液体供給装置におけるポンプ吐出動作とポンプ吸入動作を示すタイムチャートである。It is a time chart which shows the pump discharge operation | movement and pump suction operation | movement in the liquid supply apparatus shown as another comparative example. 二次側開閉弁を示す断面図である。It is sectional drawing which shows a secondary side on-off valve. 液体供給ポンプの他の形態を示す断面図である。It is sectional drawing which shows the other form of a liquid supply pump.

以下、本発明の実施の形態を図面に基づいて詳細に説明する。図１に示される液体供給装置１０は、例えば、電池容器Ｂを被注入物としてこの中に電解液を注入するために使用される。電池容器Ｂは真空タンク１１内の真空室１１ａに収容される。真空チャンバーつまり真空室１１ａは、真空タンク１１に接続された真空ポンプ１２により、所定の真空度、例えば−６０〜−８０kPa程度の真空度に保持される。電池容器Ｂ内には予め正負の電極部材とこれらの電極間に配置される多孔質のセパレータつまり隔離層とが組み込まれており、組み立てられたときにはセパレータの微細孔の内部には空気が入り込んでいる。電池容器Ｂが収容された状態のもとで真空タンク１１内を大気圧以下の圧力つまり真空圧にすると、セパレータの微細孔の内部に入り込んでいる空気は、電池容器Ｂの内部から真空室１１ａの外部に排出される。電池容器Ｂが負圧雰囲気に保持されて内部から空気が排出された状態のもとで、吐出ノズル１３から吐出される電解液Ｌが電池容器Ｂへ注入される。電池容器Ｂ内に注入される液体としての電解液Ｌは、液体収容タンク１４内に収容されている。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The liquid supply apparatus 10 shown in FIG. 1 is used, for example, for injecting an electrolytic solution into the battery container B as an injection target. The battery container B is accommodated in the vacuum chamber 11 a in the vacuum tank 11. The vacuum chamber, that is, the vacuum chamber 11a, is maintained at a predetermined degree of vacuum, for example, about −60 to −80 kPa, by the vacuum pump 12 connected to the vacuum tank 11. In the battery container B, positive and negative electrode members and a porous separator, that is, a separator layer disposed between these electrodes are previously incorporated. When assembled, air enters the micropores of the separator. Yes. When the inside of the vacuum tank 11 is set to a pressure equal to or lower than the atmospheric pressure, that is, the vacuum pressure in a state where the battery container B is accommodated, the air entering the fine pores of the separator is discharged from the inside of the battery container B to the vacuum chamber 11a. Is discharged outside. The electrolytic solution L discharged from the discharge nozzle 13 is injected into the battery container B in a state where the battery container B is held in a negative pressure atmosphere and air is discharged from the inside. The electrolyte solution L as a liquid injected into the battery container B is stored in the liquid storage tank 14.

液体供給装置１０は、図１に示されるように、ポンプ本体１５とポンプ駆動部１６とからなる液体供給ポンプ２０を有している。ポンプ本体１５は内部に長手方向に貫通する収容孔１７が形成されたポンプケース１５ａを有している。ポンプケース１５ａの下端部には流入側のジョイント部材１８が取り付けられ、上端部には流出側のジョイント部材１９が取り付けられており、それぞれのジョイント部材１８，１９はポンプケース１５ａの一部を構成している。流入側のジョイント部材１８にはこれに形成された流入ポート１８ａに連通する一次側配管２１が接続され、流出側のジョイント部材１９にはこれに形成された流出ポート１９ａに連通する二次側配管２２が接続される。一次側配管２１は液体収容タンク１４に接続され、二次側配管２２の先端には電解液Ｌを吐出する吐出ノズル１３が設けられている。吐出ノズル１３は真空タンク１１の蓋部材に設けられており、真空タンク１１内に電池容器Ｂを配置した後に蓋部材を真空タンク１１に取り付けると、真空室１１ａは密閉状態となる。真空室１１ａを所定の真空度に保持した状態のもとで、吐出ノズル１３から電池容器Ｂ内に電解液Ｌが供給される。なお、それぞれの配管２１，２２はホースやチューブ等により形成されている。 As shown in FIG. 1, the liquid supply apparatus 10 includes a liquid supply pump 20 including a pump body 15 and a pump drive unit 16. The pump body 15 has a pump case 15a in which an accommodation hole 17 penetrating in the longitudinal direction is formed. An inflow side joint member 18 is attached to the lower end portion of the pump case 15a, and an outflow side joint member 19 is attached to the upper end portion, and each joint member 18, 19 constitutes a part of the pump case 15a. doing. A primary side pipe 21 communicating with the inflow port 18a formed in the inflow side joint member 18 is connected to the inflow side joint member 18, and a secondary side pipe communicating with the outflow port 19a formed therein is connected to the outflow side joint member 19. 22 is connected. The primary side pipe 21 is connected to the liquid storage tank 14, and a discharge nozzle 13 that discharges the electrolytic solution L is provided at the tip of the secondary side pipe 22. The discharge nozzle 13 is provided on the lid member of the vacuum tank 11, and when the lid member is attached to the vacuum tank 11 after the battery container B is disposed in the vacuum tank 11, the vacuum chamber 11 a is sealed. The electrolytic solution L is supplied from the discharge nozzle 13 into the battery container B in a state where the vacuum chamber 11a is maintained at a predetermined degree of vacuum. Each of the pipes 21 and 22 is formed by a hose, a tube, or the like.

一次側配管２１には内部の流路を開閉する一次側開閉弁２３が設けられ、二次側配管２２には内部の流路を開閉する二次側開閉弁２４が設けられている。それぞれの開閉弁２３，２４は、空気の圧力により弁体を作動するようにした空気操作弁つまりエアオペレイトバルブであり、それぞれ電磁弁２５，２６のパイロット流路２５ａ，２６ａから供給される圧縮空気をパイロット圧として流路切換が行われる。 The primary side pipe 21 is provided with a primary side on-off valve 23 for opening and closing the internal flow path, and the secondary side pipe 22 is provided with a secondary side on-off valve 24 for opening and closing the internal flow path. Each of the on-off valves 23 and 24 is an air operation valve, that is, an air-operated valve that operates the valve body by the pressure of air, and compression supplied from pilot flow paths 25a and 26a of the electromagnetic valves 25 and 26, respectively. Channel switching is performed using air as a pilot pressure.

ポンプケース１５ａ内には、フッ素樹脂等の径方向に弾性変形自在の可撓性のチューブ２７がポンプ部材として装着されている。このチューブ２７の流入端部はポンプケース１５ａとジョイント部材１８との間に挟み付けられ、流出端部はポンプケース１５ａとジョイント部材１９の間に挟み付けられている。チューブ２７の流入端部をポンプケース１５ａに溶接するようにしても良く、流出端部についても同様にポンプケース１５ａに溶接するようにしても良い。チューブ２７によってポンプケース１５ａの内部は、チューブ２７の内側のポンプ室２８と外側の駆動室２９とに仕切られている。ポンプ室２８は流入ポート１８ａと流出ポート１９ａとに連通している。流出ポート１９ａは流入ポート１８ａの上方に設けられており、両方のポート１８ａ，１９ａは同軸となっている。これにより、電解液内に気泡が混入されていても、その気泡がポンプ室２８内に止まることが防止される。 A flexible tube 27 that is elastically deformable in the radial direction, such as a fluororesin, is mounted as a pump member in the pump case 15a. The inflow end portion of the tube 27 is sandwiched between the pump case 15 a and the joint member 18, and the outflow end portion is sandwiched between the pump case 15 a and the joint member 19. The inflow end portion of the tube 27 may be welded to the pump case 15a, and the outflow end portion may be similarly welded to the pump case 15a. The inside of the pump case 15 a is partitioned by the tube 27 into a pump chamber 28 inside the tube 27 and a drive chamber 29 outside. The pump chamber 28 communicates with the inflow port 18a and the outflow port 19a. The outflow port 19a is provided above the inflow port 18a, and both the ports 18a and 19a are coaxial. Thereby, even if bubbles are mixed in the electrolytic solution, the bubbles are prevented from stopping in the pump chamber 28.

ポンプ駆動部１６は駆動ユニット３１に取り付けられる駆動部ケース１６ａを有しており、この駆動部ケース１６ａはポンプケース１５ａと一体となっている。駆動部ケース１６ａの内部には円筒形状の収容孔３２が形成され、駆動部ケース１６ａの一端部は閉塞壁３３により閉塞された閉塞端となっており、他端部には開口部３４が形成されている。駆動部ケース１６ａの内部には、ポンプ駆動部材としての駆動ロッド３５が直線往復動自在に装着されており、この駆動ロッド３５は駆動ユニット３１内に組み込まれた電動モータや空気圧シリンダ等からなる図示しない駆動装置により往復動される。駆動ロッド３５の閉塞壁３３に向かう移動を前進移動とし、閉塞壁３３から離れる方向の移動を後退移動とする。 The pump drive unit 16 has a drive unit case 16a attached to the drive unit 31, and this drive unit case 16a is integrated with the pump case 15a. A cylindrical housing hole 32 is formed inside the drive unit case 16a, one end of the drive unit case 16a is a closed end closed by a closed wall 33, and an opening 34 is formed at the other end. Has been. A drive rod 35 as a pump drive member is mounted in the drive unit case 16a so as to be linearly reciprocable. The drive rod 35 includes an electric motor, a pneumatic cylinder and the like incorporated in the drive unit 31. It is reciprocated by a drive device that does not. The movement of the drive rod 35 toward the blocking wall 33 is defined as a forward movement, and the movement away from the blocking wall 33 is defined as a backward movement.

駆動部ケース１６ａ内にはベローズ３６が装着されている。このベローズ３６は、蛇腹部３６ａとこれの一端部に設けられた端板部３６ｂと他端部に設けられたリング部３６ｃとを有し、フッ素樹脂等によりこれらが一体となって成形されている。端板部３６ｂには、駆動ロッド３５の先端部に設けられた雄ねじ３５ａにねじ結合されるねじ孔３７が形成されており、端板部３６ｂは駆動ロッド３５の先端部に固定される。一方、リング部３６ｃは駆動部ケース１６ａの開口部３４に形成された段部３４ａに当接し、駆動ユニット３１と駆動部ケース１６ａとにより挟み付けられている。 A bellows 36 is mounted in the drive unit case 16a. The bellows 36 includes a bellows portion 36a, an end plate portion 36b provided at one end portion thereof, and a ring portion 36c provided at the other end portion thereof, and these are integrally molded with a fluororesin or the like. Yes. The end plate portion 36 b is formed with a screw hole 37 to be screwed to a male screw 35 a provided at the distal end portion of the drive rod 35, and the end plate portion 36 b is fixed to the distal end portion of the drive rod 35. On the other hand, the ring portion 36c abuts on a step portion 34a formed in the opening 34 of the drive unit case 16a, and is sandwiched between the drive unit 31 and the drive unit case 16a.

ベローズ３６の外側と駆動部ケース１６ａの収容孔３２の内面とにより駆動室３８が区画され、この駆動室３８は連通孔３９によりポンプケース１５ａ内の駆動室２９に連通している。ベローズ３６の内側は図示しない息付き用のブリード孔を介して外部に連通し、大気圧となっている。それぞれの駆動室２９，３８と連通孔３９には間接媒体としての液媒体Ｍが封入されており、図１においては液媒体Ｍが点を付して示されている。 A drive chamber 38 is defined by the outer side of the bellows 36 and the inner surface of the accommodation hole 32 of the drive unit case 16a. The drive chamber 38 communicates with the drive chamber 29 in the pump case 15a through a communication hole 39. The inside of the bellows 36 communicates with the outside via a breathing bleed hole (not shown) and is at atmospheric pressure. A liquid medium M as an indirect medium is sealed in each of the drive chambers 29 and 38 and the communication hole 39, and the liquid medium M is shown with dots in FIG.

駆動ロッド３５を図１に示す後退限位置に向けて後退移動させると、駆動室３８が膨張して駆動室２９内の液媒体Ｍが連通孔３９を介して駆動室３８内に吸入される。これにより、駆動室２９が収縮してチューブ２７は径方向に膨張し、ポンプ室２８が膨張することになる。ポンプ室２８が膨張するときに、一次側開閉弁２３を開き、二次側開閉弁２４を閉じると、ポンプ室２８は負圧状態となり、液体収容タンク１４内の電解液Ｌはポンプ室２８内に吸入される。 When the drive rod 35 is moved backward toward the backward limit position shown in FIG. 1, the drive chamber 38 expands and the liquid medium M in the drive chamber 29 is sucked into the drive chamber 38 through the communication hole 39. As a result, the drive chamber 29 contracts, the tube 27 expands in the radial direction, and the pump chamber 28 expands. When the primary opening / closing valve 23 is opened and the secondary opening / closing valve 24 is closed when the pump chamber 28 is expanded, the pump chamber 28 is in a negative pressure state, and the electrolyte L in the liquid storage tank 14 is contained in the pump chamber 28. Inhaled.

これに対し、駆動ロッド３５を前進移動させると、駆動室３８が収縮して駆動室３８内の液媒体Ｍが連通孔３９を介して駆動室２９に供給され、駆動室２９が膨張する。これにより、チューブ２７は径方向に収縮してポンプ室２８が収縮することになる。ポンプ室２８が収縮するときに、一次側開閉弁２３を閉じ、二次側開閉弁２４を開くと、ポンプ室２８は吐出圧に加圧されてポンプ室２８内の電解液Ｌは吐出ノズル１３から吐出して電池容器Ｂ内に注入供給される。 On the other hand, when the drive rod 35 is moved forward, the drive chamber 38 contracts, the liquid medium M in the drive chamber 38 is supplied to the drive chamber 29 through the communication hole 39, and the drive chamber 29 expands. As a result, the tube 27 contracts in the radial direction and the pump chamber 28 contracts. When the pump chamber 28 contracts, when the primary side opening / closing valve 23 is closed and the secondary side opening / closing valve 24 is opened, the pump chamber 28 is pressurized to the discharge pressure, and the electrolyte L in the pump chamber 28 is discharged from the discharge nozzle 13. And discharged from the battery container B and supplied.

吐出ノズル１３は真空室１１ａに開口しており、真空室１１ａを負圧状態とすると、吐出ノズル１３の内部流路も負圧状態となる。この状態のもとで、二次側開閉弁２４を開放させると、ポンプ室２８内にも負圧が伝達されることになる。このように、ポンプ室２８内に負圧が伝達された状態のもとで、ポンプ室２８を収縮させて吐出ノズル１３から電池容器Ｂ内に電解液Ｌを注入すると、ポンプ室２８内の電解液Ｌが真空室１１ａに吸い出されることになる。このため、吐出ノズル１３から吐出される電解液Ｌの吐出量が駆動ロッド３５の吐出ストロークに対応しなくなるので、一定量の電解液Ｌを高精度で電池容器Ｂ内に注入することができなくなる。 The discharge nozzle 13 is open to the vacuum chamber 11a. When the vacuum chamber 11a is in a negative pressure state, the internal flow path of the discharge nozzle 13 is also in a negative pressure state. Under this state, when the secondary side opening / closing valve 24 is opened, negative pressure is also transmitted into the pump chamber 28. In this way, when the negative pressure is transmitted into the pump chamber 28, the pump chamber 28 is contracted and the electrolyte L is injected into the battery container B from the discharge nozzle 13. The liquid L is sucked into the vacuum chamber 11a. For this reason, since the discharge amount of the electrolyte L discharged from the discharge nozzle 13 does not correspond to the discharge stroke of the drive rod 35, it is impossible to inject a certain amount of the electrolyte L into the battery container B with high accuracy. .

そこで、図１に示す液体供給装置１０においては、吐出ノズル１３の内部流路には絞り部４０が設けられている。この絞り部４０は、二次側配管２２のうち二次側開閉弁２４と流出ポート１９ａとの間の流路径よりも吐出ノズル１３の流路径を小径にすることにより形成されている。このように、吐出ノズル１３に絞り部４０を設けると、二次側開閉弁２４を開放させた状態のもとで、ポンプ駆動部材としての駆動ロッド３５によりポンプ室２８を収縮させて電解液Ｌを真空室１１ａ内に吐出して電池容器Ｂ内に注入する過程においては、真空室１１ａ内の負圧つまり真空がポンプ室２８に伝達されるのが防止される。つまり、電解液Ｌの注入過程においては、ポンプ室２８の圧力は大気圧以上の吐出圧力に保持される。これにより、ポンプ室２８から吐出ノズル１３に向かって吐出される電解液Ｌの吐出量は、ポンプ室２８の収縮量に正確に対応する。この収縮量はベローズ３６の伸び移動のストロークに対応し、吐出ノズル１３から吐出される電解液Ｌの量は駆動ロッド３５の移動量に正確に比例する。 Therefore, in the liquid supply apparatus 10 shown in FIG. 1, a throttle unit 40 is provided in the internal flow path of the discharge nozzle 13. The throttle portion 40 is formed by making the flow path diameter of the discharge nozzle 13 smaller than the flow path diameter between the secondary side on-off valve 24 and the outflow port 19a in the secondary side pipe 22. Thus, when the throttle part 40 is provided in the discharge nozzle 13, the pump chamber 28 is contracted by the drive rod 35 as a pump drive member in a state where the secondary side on-off valve 24 is opened, and the electrolyte L Is discharged into the vacuum chamber 11 a and injected into the battery container B, the negative pressure in the vacuum chamber 11 a, that is, the vacuum is prevented from being transmitted to the pump chamber 28. That is, in the process of injecting the electrolytic solution L, the pressure in the pump chamber 28 is maintained at a discharge pressure equal to or higher than atmospheric pressure. Thereby, the discharge amount of the electrolyte L discharged from the pump chamber 28 toward the discharge nozzle 13 accurately corresponds to the contraction amount of the pump chamber 28. The amount of contraction corresponds to the stroke of the bellows 36, and the amount of electrolyte L discharged from the discharge nozzle 13 is exactly proportional to the amount of movement of the drive rod 35.

ポンプ室２８を収縮させて電池容器Ｂ内に電解液を注入する注入過程の開始から終了までが全吐出過程である。その全吐出過程において真空室１１ａ内の負圧がポンプ室２８内に伝達されないようにするには、以下のように行う。つまり、電池容器Ｂ内への電解液Ｌの注入開始時には、二次側開閉弁２４の開放動作を駆動ロッド３５の駆動開始よりも遅延させることが好ましい。また、注入停止時には、二次側開閉弁２４の閉塞動作を駆動ロッド３５の駆動停止よりも早めることが好ましい。これにより、ポンプ室２８の圧力は大気圧以上の吐出圧力に保持される。 The entire discharge process is from the start to the end of the injection process in which the pump chamber 28 is contracted and the electrolytic solution is injected into the battery container B. In order to prevent the negative pressure in the vacuum chamber 11a from being transmitted into the pump chamber 28 during the entire discharge process, the following procedure is performed. That is, at the start of injection of the electrolyte L into the battery container B, it is preferable to delay the opening operation of the secondary side opening / closing valve 24 from the start of driving of the drive rod 35. In addition, when the injection is stopped, it is preferable that the closing operation of the secondary side opening / closing valve 24 is made earlier than the driving stop of the drive rod 35. As a result, the pressure in the pump chamber 28 is maintained at a discharge pressure equal to or higher than atmospheric pressure.

図１に示す液体供給装置１０においては、絞り部４０を吐出ノズル１３の流路により形成している。しかし、絞り部４０を吐出ノズル１３に設けることなく、絞り部４０を二次側配管２２のうち二次側開閉弁２４よりも下流側の部分に設けるようにしても良い。 In the liquid supply apparatus 10 shown in FIG. 1, the throttle unit 40 is formed by the flow path of the discharge nozzle 13. However, the throttle unit 40 may be provided in a portion of the secondary side pipe 22 on the downstream side of the secondary on-off valve 24 without providing the throttle unit 40 in the discharge nozzle 13.

絞り部４０を形成するには、液体である電解液Ｌの粘度と吐出ノズル１３からの吐出流速に応じて、絞り部４０の内径寸法と長さ寸法とが設定されることになる。例えば、吐出ノズル１３に内径を１mmとし、長さを２０mmとした流路により絞り部４０を形成した場合には、電解液Ｌを１０ml/secの流速で吐出ノズル１３から吐出させることができ、同一の内径で長さを５０mmとした絞り部４０を形成した場合には、電解液Ｌを５ml/secの流速で吐出することができた。 In order to form the throttle portion 40, the inner diameter dimension and the length dimension of the throttle portion 40 are set according to the viscosity of the electrolyte L as a liquid and the discharge flow rate from the discharge nozzle 13. For example, when the throttle portion 40 is formed by a flow path having an inner diameter of 1 mm and a length of 20 mm in the discharge nozzle 13, the electrolyte L can be discharged from the discharge nozzle 13 at a flow rate of 10 ml / sec. When the throttle part 40 having the same inner diameter and a length of 50 mm was formed, the electrolytic solution L could be discharged at a flow rate of 5 ml / sec.

図１に示した絞り部４０は内径が一定の固定絞りであるが、絞り部４０の他の形態としては可変絞りがある。可変絞りを吐出ノズル１３に設けると、液体の粘度に応じて吐出ノズル１３の内径を調節することができる。可変絞りを吐出ノズル１３に設けることなく、二次側配管２２のうち二次側開閉弁２４よりも下流側の部分に設けるようにしても良い。また、絞り部４０の他の形態としては、吐出ノズル１３の流路の長さを調整するようにした構造の可変絞りとすることができる。 The throttle unit 40 shown in FIG. 1 is a fixed throttle with a constant inner diameter, but another form of the throttle unit 40 is a variable throttle. When a variable throttle is provided in the discharge nozzle 13, the inner diameter of the discharge nozzle 13 can be adjusted according to the viscosity of the liquid. A variable throttle may be provided in the downstream side of the secondary opening / closing valve 24 in the secondary pipe 22 without providing the discharge nozzle 13. Further, as another form of the throttle unit 40, a variable throttle having a structure in which the length of the flow path of the discharge nozzle 13 is adjusted can be used.

ポンプ室２８を膨張させて液体収容タンク１４内の電解液Ｌをポンプ室２８内に供給する際には、二次側開閉弁２４が閉塞されるので、ポンプ室２８には負圧が伝達されない。したがって、電解液Ｌを電池容器Ｂ内に注入するときと相違し、駆動ロッド３５の後退移動開始とほぼ同時に一次側開閉弁２３を開放動作させることができる。さらに、駆動ロッド３５の後退移動開始よりも早く一次側開閉弁２３を開放させても良い。 When the pump chamber 28 is expanded and the electrolytic solution L in the liquid storage tank 14 is supplied into the pump chamber 28, the secondary side on-off valve 24 is closed, so that no negative pressure is transmitted to the pump chamber 28. . Therefore, unlike when the electrolyte L is injected into the battery container B, the primary side on-off valve 23 can be opened almost simultaneously with the start of the backward movement of the drive rod 35. Further, the primary side opening / closing valve 23 may be opened earlier than the start of the backward movement of the drive rod 35.

図２は液体供給装置１０の駆動制御回路を示すブロック図であり、一次側と二次側の２つの電磁弁２５，２６と、駆動ロッド３５を往復動するための電動モータ４１はコントローラ４２により制御されるようになっている。コントローラ４２にはポンプ吐出動作と吸引動作とを指令する指令信号４３が上位のコントローラから送られるようになっている。 FIG. 2 is a block diagram showing a drive control circuit of the liquid supply apparatus 10, and the electric motor 41 for reciprocating the drive rod 35 and the two electromagnetic valves 25 and 26 on the primary side and the secondary side are controlled by the controller 42. To be controlled. A command signal 43 for commanding the pump discharge operation and the suction operation is sent from the host controller to the controller 42.

図３は図１に示す液体供給装置のポンプ吐出動作とポンプ吸入動作を示すタイムチャートであり、図３を参照しつつ液体供給装置１０によって電池容器Ｂ内に電解液Ｌを注入供給する手順について説明する。 FIG. 3 is a time chart showing the pump discharge operation and the pump suction operation of the liquid supply apparatus shown in FIG. 1, and the procedure for injecting and supplying the electrolyte L into the battery container B by the liquid supply apparatus 10 with reference to FIG. explain.

吐出ノズル１３から真空室１１ａ内の電池容器Ｂ内に電解液Ｌを注入するには、真空室１１ａ内の圧力は大気圧以下の圧力つまり真空状態に保持される。これにより、予め真空室１１ａ内に配置された被注入物としての電池容器Ｂの内部は負圧雰囲気に保持された状態となり、多孔質のセパレータ内に入り込んだ空気は外部に排出される。この状態のもとで、指令信号がコントローラ４２に送られると、駆動ロッド３５が駆動ユニット３１内に組み込まれた電動モータ等の駆動手段により前進駆動されてポンプ吐出動作が実行される。駆動手段によって駆動ロッド３５が前進駆動が開始されてから、ポンプ室２８から二次側配管２２に向けて電解液Ｌが吐出される流量が一定になるまでには、若干の遅れがある。この前進駆動開始よりも遅延時間Ｔａだけ遅れて二次側開閉弁２４を開放させる。ポンプ吐出動作が行われるときには、一次側開閉弁２３は閉じられた状態に保持される。 In order to inject the electrolyte L into the battery container B in the vacuum chamber 11a from the discharge nozzle 13, the pressure in the vacuum chamber 11a is maintained at a pressure equal to or lower than atmospheric pressure, that is, in a vacuum state. As a result, the inside of the battery container B as the injected material previously placed in the vacuum chamber 11a is maintained in a negative pressure atmosphere, and the air that has entered the porous separator is discharged to the outside. Under this state, when a command signal is sent to the controller 42, the drive rod 35 is driven forward by a drive means such as an electric motor incorporated in the drive unit 31, and a pump discharge operation is executed. There is a slight delay until the flow rate at which the electrolytic solution L is discharged from the pump chamber 28 toward the secondary side pipe 22 becomes constant after the drive rod 35 starts to be driven forward by the drive means. The secondary side open / close valve 24 is opened after a delay time Ta from the start of forward drive. When the pump discharge operation is performed, the primary side on-off valve 23 is kept closed.

図３に示すように、二次側開閉弁２４の開放動作時を駆動ロッド３５によるポンプ吐出動作開始時よりも遅延させると、ポンプ室２８内の圧力は急速に上昇する。二次側開閉弁２４が開放された後にはポンプ室２８の圧力は低下することになるが、吐出ノズル１３には絞り部４０が設けられているのでポンプ室２８内の圧力が負圧状態となることがなく、正圧に保持される。二次側開閉弁２４が開放されてから所定の時間が経過すると、ポンプ室２８内の圧力は駆動ロッド３５の前進移動により設定される一定の吐出圧力になる。すなわち、絞り部４０の先端側つまり真空室１１ａ側は負圧となり、絞り部４０の後端側つまり二次側配管２２側はポンプ吐出圧となる。このように、絞り部４０の先端側と後端側との間には圧力勾配が発生する。これが絞り部４０の効果である。言い換えれば、電解液Ｌは吐出抵抗による圧力勾配の中を定常状態で絞り部４０を流れる。 As shown in FIG. 3, when the opening operation of the secondary side on-off valve 24 is delayed from the start of the pump discharge operation by the drive rod 35, the pressure in the pump chamber 28 increases rapidly. After the secondary side opening / closing valve 24 is opened, the pressure in the pump chamber 28 decreases. However, since the discharge nozzle 13 is provided with the throttle portion 40, the pressure in the pump chamber 28 is in a negative pressure state. The positive pressure is maintained. When a predetermined time elapses after the secondary opening / closing valve 24 is opened, the pressure in the pump chamber 28 becomes a constant discharge pressure set by the forward movement of the drive rod 35. That is, the front end side of the throttle unit 40, that is, the vacuum chamber 11a side is negative pressure, and the rear end side of the throttle unit 40, that is, the secondary pipe 22 side is pump discharge pressure. Thus, a pressure gradient is generated between the front end side and the rear end side of the throttle unit 40. This is the effect of the throttle unit 40. In other words, the electrolyte L flows through the throttle portion 40 in a steady state in the pressure gradient caused by the discharge resistance.

吐出ノズル１３から電池容器Ｂ内に対して一定量の電解液Ｌが注入された後には、二次側開閉弁２４を閉塞する。この二次側開閉弁２４の閉塞動作は、駆動ロッド３５の駆動停止時期よりも所定の時間Ｔｂだけ早く行われる。このように、ポンプ吐出動作の終了動作時期よりも二次側開閉弁２４を早く閉じると、ポンプ吐出動作が完全に終了するまでにポンプ室２８の圧力が負圧となることが防止され、正圧に保持される。 After a certain amount of electrolyte L is injected from the discharge nozzle 13 into the battery container B, the secondary side on-off valve 24 is closed. The closing operation of the secondary side opening / closing valve 24 is performed earlier by a predetermined time Tb than the drive stop timing of the drive rod 35. As described above, when the secondary side on-off valve 24 is closed earlier than the end timing of the pump discharge operation, the pressure in the pump chamber 28 is prevented from becoming negative until the pump discharge operation is completely ended. Held in pressure.

ポンプ室２８内に電解液Ｌを吸引注入する際には、図３に示されるように、二次側開閉弁２４を閉塞した状態のもとで、一次側開閉弁２３を開放するとともに駆動ロッド３５を後退移動させるポンプ吸入動作を行うことになる。 When the electrolyte L is sucked and injected into the pump chamber 28, as shown in FIG. 3, the primary side on-off valve 23 is opened and the drive rod is closed with the secondary side on-off valve 24 closed. A pump suction operation for moving 35 backward is performed.

図４および図５はそれぞれ比較例として示す液体供給装置におけるポンプ吐出動作とポンプ吸入動作のタイムチャートである。 4 and 5 are time charts of a pump discharge operation and a pump suction operation in a liquid supply apparatus shown as a comparative example, respectively.

図４は吐出ノズル１３に絞り部４０を設けない液体供給装置を用いて、電解液Ｌの吐出時に二次側開閉弁２４の開放動作と駆動ロッド３５によりポンプ吐出動作とをほぼ同時に開始した場合における吐出時のポンプ室２８の吐出圧力の変化を示す。絞り部４０を液体供給装置に設けないと、真空室１１ａ内の負圧がポンプ室２８内に伝達されることになるので、吐出ノズル１３から電池容器Ｂ内への電解液Ｌの注入は、真空室１１ａ内の負圧による吸い出しにより行われることになる。このため、注入量は駆動ロッド３５のストロークに依存しなくなるので、高精度で電解液を注入することができない。 FIG. 4 shows a case in which the opening operation of the secondary side on-off valve 24 and the pump discharge operation are started almost simultaneously by the drive rod 35 when discharging the electrolyte L using a liquid supply device in which the discharge nozzle 13 is not provided with the throttle 40. The change of the discharge pressure of the pump chamber 28 at the time of discharge in FIG. If the throttle unit 40 is not provided in the liquid supply device, the negative pressure in the vacuum chamber 11a is transmitted into the pump chamber 28. Therefore, the injection of the electrolyte L from the discharge nozzle 13 into the battery container B is as follows. This is performed by sucking out due to negative pressure in the vacuum chamber 11a. For this reason, since the injection amount does not depend on the stroke of the drive rod 35, the electrolytic solution cannot be injected with high accuracy.

図５は図１に示したように吐出ノズル１３に絞り部４０を設けた液体供給装置を用いているが、二次側開閉弁２４の開閉動作と駆動ロッド３５によるポンプ動作の開始終了とを同期させた場合における吐出時のポンプ室２８の吐出圧力の変化を示す。二次側開閉弁２４の開放動作とポンプ動作開始とを同時に行うと、瞬時に、真空室１１ａの負圧がポンプ室２８内に伝達され、ポンプ室２８の圧力は負圧になる。それ以降は、電解液Ｌが絞り部を流れ始めてそこに圧力勾配が生じるから、図示するようにポンプ室２８の圧力が上昇する。電解液の流れが定常状態に至れば圧力勾配も一定となり、ポンプ室２８の圧力は一定となる。 FIG. 5 uses a liquid supply apparatus in which the discharge nozzle 13 is provided with a throttle 40 as shown in FIG. 1, but the opening / closing operation of the secondary side opening / closing valve 24 and the start / end of the pump operation by the drive rod 35 are performed. The change of the discharge pressure of the pump chamber 28 at the time of discharge in the case of synchronizing is shown. When the opening operation of the secondary side on-off valve 24 and the start of the pump operation are performed simultaneously, the negative pressure in the vacuum chamber 11a is instantaneously transmitted into the pump chamber 28, and the pressure in the pump chamber 28 becomes negative. Thereafter, the electrolytic solution L begins to flow through the constricted portion and a pressure gradient is generated there, so that the pressure in the pump chamber 28 increases as shown in the figure. When the flow of the electrolyte reaches a steady state, the pressure gradient becomes constant, and the pressure in the pump chamber 28 becomes constant.

瞬間的にポンプ室２８内に負圧が伝達されると、より高精度での吐出が達成されなくなるが、図３に示すように、二次側開閉弁２４の開閉タイミングとポンプ動作のタイミングとに時間差を設けることにより、ポンプ動作開始時と終了時とにおいても負圧がポンプ室２８内に伝達されることなく、吐出精度をより高めることができる。 If negative pressure is instantaneously transmitted into the pump chamber 28, discharge with higher accuracy cannot be achieved. However, as shown in FIG. 3, the opening / closing timing of the secondary side on-off valve 24 and the timing of pump operation By providing a time difference, the negative pressure is not transmitted into the pump chamber 28 at the start and end of the pump operation, and the discharge accuracy can be further increased.

図６は二次側開閉弁２４を示す断面図であり、バルブケース４５にはポンプ本体１５が接続される一次側ポート４６と、吐出ノズル１３が接続される二次側ポート４７とが形成されている。両方のポートが連通する弁室４８にはダイヤフラム形の弁体４９が配置されており、弁体４９は二次側ポート４７が開口する弁座５０に接触する位置と弁座５０から離れる位置とに開閉動作する。弁体４９に設けられた弁軸５１には、弁体４９を閉じる方向にばね力が加えられ、電磁弁２６のパイロット流路２６ａからパイロット圧が加えられるようになっており、パイロット圧が加えられるとばね力に抗して弁体４９は弁座５０から離れて二次側開閉弁２４は開放状態となる。弁座５０に開口されたポートを二次側ポート４７としてこれに吐出ノズル１３を接続すると、真空タンク１１内の負圧により弁体４９は弁座５０に密着する方向の吸着力を受けることになり、二次側開閉弁２４のシール性を高めることができる。しかも、ダイヤフラム形の弁体４９を使用すると、開閉時の二次側ポート４７内の電解液の移動を少なくすることができるので、吐出ノズル１３からの吐出精度を高めることができる。 FIG. 6 is a cross-sectional view showing the secondary opening / closing valve 24. The valve case 45 is formed with a primary port 46 to which the pump body 15 is connected and a secondary port 47 to which the discharge nozzle 13 is connected. ing. A diaphragm-shaped valve body 49 is disposed in the valve chamber 48 in which both ports communicate with each other, and the valve body 49 is in contact with the valve seat 50 where the secondary side port 47 is opened and in a position away from the valve seat 50. Open and close. A spring force is applied to the valve shaft 51 provided in the valve body 49 in a direction to close the valve body 49 so that a pilot pressure is applied from the pilot flow path 26a of the electromagnetic valve 26, and the pilot pressure is applied. When this occurs, the valve element 49 moves away from the valve seat 50 against the spring force, and the secondary side on-off valve 24 is opened. When the port opened to the valve seat 50 is a secondary side port 47 and the discharge nozzle 13 is connected thereto, the negative pressure in the vacuum tank 11 causes the valve body 49 to receive an adsorbing force in a direction in close contact with the valve seat 50. Thus, the sealing performance of the secondary side opening / closing valve 24 can be enhanced. In addition, when the diaphragm-shaped valve body 49 is used, the movement of the electrolyte in the secondary port 47 during opening and closing can be reduced, so that the discharge accuracy from the discharge nozzle 13 can be improved.

一次側開閉弁２３を二次側開閉弁２４と同様のエアオペレイトバルブを用いるようにすると、一次側と二次側の開閉弁を１種類の開閉弁とすることができる。図６に示すエアオペレイトバルブを一次側開閉弁２３として使用する場合には、図６に示された二次側ポート４７をポンプ室２８に連通させることになる。なお、それぞれの開閉弁２３，２４として、エアオペレイトバルブを使用することなく、流路を開閉する２ポート型であって、電気信号により開閉動作する電磁弁を使用するようにしても良い。 When the primary side on-off valve 23 is an air operated valve similar to the secondary side on-off valve 24, the primary side and secondary side on-off valves can be used as one type of on-off valve. When the air operated valve shown in FIG. 6 is used as the primary side on-off valve 23, the secondary side port 47 shown in FIG. 6 is communicated with the pump chamber 28. Note that each of the opening / closing valves 23 and 24 may be a two-port type that opens and closes the flow path without using an air operated valve, and may use an electromagnetic valve that opens and closes by an electrical signal.

図１に示す液体供給装置１０においては、液体供給ポンプ２０はポンプ室２８が形成されたポンプ本体１５とベローズ３６が組み込まれたポンプ駆動部１６とを備え、駆動ロッド３５の軸方向往復動を間接媒体としての液媒体Ｍを介してポンプ室２８を膨張収縮させている。摺動する部分がないので、ポンプ室２８が吐出圧力にまで加圧されても外部に電解液Ｌや液媒体Ｍが漏出することがない。 In the liquid supply apparatus 10 shown in FIG. 1, the liquid supply pump 20 includes a pump main body 15 in which a pump chamber 28 is formed and a pump drive unit 16 in which a bellows 36 is incorporated, and the drive rod 35 reciprocates in the axial direction. The pump chamber 28 is expanded and contracted through the liquid medium M as an indirect medium. Since there is no sliding part, even if the pump chamber 28 is pressurized to the discharge pressure, the electrolytic solution L and the liquid medium M do not leak to the outside.

図７は液体供給ポンプの他の形態を示す断面図である。この液体供給ポンプ２０ａは液媒体Ｍを使用することなく、図７に示すように、ベローズ３６により直接ポンプ室２８を膨張収縮させるようにしている。ポンプケース１５ａは、閉塞壁５２が設けられた円筒部材５３により形成されており、円筒部材５３の内面とベローズ３６とによりポンプ室２８が区画されている。駆動ロッド３５によりベローズ３６を伸縮させると、ポンプ室２８は膨張収縮してポンプ動作を行うことになる。 FIG. 7 is a cross-sectional view showing another embodiment of the liquid supply pump. The liquid supply pump 20a directly expands and contracts the pump chamber 28 by the bellows 36 without using the liquid medium M, as shown in FIG. The pump case 15 a is formed by a cylindrical member 53 provided with a blocking wall 52, and the pump chamber 28 is partitioned by the inner surface of the cylindrical member 53 and the bellows 36. When the bellows 36 is expanded and contracted by the drive rod 35, the pump chamber 28 expands and contracts to perform the pump operation.

液体供給ポンプの他の形態としては、例えば、特許第４５４７３６８号公報に記載されるように、ピストンとこれが往復動自在に装着されるシリンダとを有する構造のものを使用することかできる。この形態の液体供給ポンプにおいては、ピストンがシリンダに摺動接触しているが、シール室がベローズカバーにより覆われるので、駆動室内における液媒体が外部に漏出することを防止できる。さらに他の液体供給ポンプの形態としては、例えば、特許第３５５４１１５号公報に記載されるように、ポンプ室を内部に形成するチューブの外側に、大型ベローズ部と小型ベローズ部とを有する軸方向に弾性変形自在のベローズを配置し、ベローズとチューブとの間に媒体液が封入された駆動室を形成するようにした構造のものを使用することができる。これらの液体供給ポンプはいずれも、電解液や媒体液が外部に漏出しないようにした形態であるが、ピストンを用いたシリンジタイプのものを使用することも可能である。 As another form of the liquid supply pump, for example, as described in Japanese Patent No. 4547368, a structure having a piston and a cylinder on which the piston is reciprocally mounted can be used. In the liquid supply pump of this form, the piston is in sliding contact with the cylinder, but since the seal chamber is covered with the bellows cover, the liquid medium in the drive chamber can be prevented from leaking to the outside. As another form of the liquid supply pump, for example, as described in Japanese Patent No. 3554115, in the axial direction having a large bellows portion and a small bellows portion outside the tube forming the pump chamber inside. It is possible to use a structure in which an elastically deformable bellows is arranged to form a drive chamber in which a medium liquid is sealed between the bellows and the tube. Each of these liquid supply pumps has a configuration in which the electrolytic solution and the medium solution are not leaked to the outside, but a syringe type using a piston can be used.

本発明は前記実施の形態に限定されるものではなく、その要旨を逸脱しない範囲で種々変更可能である。図１に示した液体供給装置は、２次電池を製造するために電池容器Ｂ内に電解液Ｌを注入する工程に使用されているが、負圧雰囲気に保持された容器内に液体を注入するためであれば、本発明の液体供給装置は電池容器内に電解液を注入する場合以外にも使用することができる。 The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. The liquid supply apparatus shown in FIG. 1 is used in the process of injecting the electrolyte L into the battery container B to manufacture a secondary battery, but the liquid is injected into the container held in a negative pressure atmosphere. Therefore, the liquid supply apparatus of the present invention can be used in addition to the case of injecting the electrolytic solution into the battery container.

１１真空タンク
１１ａ真空室
１２真空ポンプ
１３吐出ノズル
１４液体収容タンク
１５ポンプ本体
１６ポンプ駆動部
１８ａ流入ポート
１９ａ流出ポート
２０液体供給ポンプ
２１一次側配管
２２二次側配管
２３一次側開閉弁
２４二次側開閉弁
２５，２６電磁弁
２７チューブ
２８ポンプ室
２９駆動室
３１駆動ユニット
３５駆動ロッド（ポンプ駆動部材）
３６ベローズ
３８駆動室
４０絞り部 DESCRIPTION OF SYMBOLS 11 Vacuum tank 11a Vacuum chamber 12 Vacuum pump 13 Discharge nozzle 14 Liquid storage tank 15 Pump main body 16 Pump drive part 18a Inflow port 19a Outflow port 20 Liquid supply pump 21 Primary side piping 22 Secondary side piping 23 Primary side on-off valve 24 Secondary Side open / close valve 25, 26 Solenoid valve 27 Tube 28 Pump chamber 29 Drive chamber 31 Drive unit 35 Drive rod (pump drive member)
36 Bellows 38 Drive chamber 40 Restriction part

Claims

A pump chamber communicating with a primary side pipe connected to a liquid storage tank for storing liquid and a secondary side pipe connected to a discharge nozzle for injecting liquid into an injection target; The liquid in the liquid storage tank was sucked into the pump chamber, and the pump chamber was contracted to maintain a negative pressure atmosphere using a liquid supply pump provided with a pump drive member that discharges the liquid from a discharge nozzle. A liquid supply method for supplying a liquid to the injection object,
The flow path of the primary side pipe is opened by the primary side on-off valve provided in the primary side pipe, and the flow path of the secondary side pipe is closed by the secondary side on-off valve provided in the secondary side pipe. An inhalation step of inflating the pump chamber under conditions and sucking liquid into the pump chamber;
The discharge from the secondary side on-off valve in a state where the flow path of the primary side pipe is closed by the primary side on-off valve and the flow path of the secondary side pipe is opened by the secondary side on-off valve. while preventing the negative pressure by the stop portion provided on until the tip of the nozzle is transmitted to the pump chamber, the object to be injected was liquid in the pump chamber by contracting the pump chamber from the discharge nozzle possess the injection for supplying the injection process,
The liquid supply method characterized by delaying the opening operation of the secondary side on-off valve from the start of driving of the pump drive member at the start of liquid injection into the injection target .

2. The liquid supply method according to claim 1 , wherein when the liquid injection into the injected object is stopped, the closing operation of the secondary side on-off valve is made earlier than the drive stop of the pump driving member. .

A pump chamber communicating with a primary side pipe connected to a liquid storage tank for storing liquid and a secondary side pipe connected to a discharge nozzle for injecting liquid into an injection target; The liquid in the liquid storage tank was sucked into the pump chamber, and the pump chamber was contracted to maintain a negative pressure atmosphere using a liquid supply pump provided with a pump drive member that discharges the liquid from a discharge nozzle. A liquid supply method for supplying a liquid to the injection object,
The flow path of the primary side pipe is opened by the primary side on-off valve provided in the primary side pipe, and the flow path of the secondary side pipe is closed by the secondary side on-off valve provided in the secondary side pipe. An inhalation step of inflating the pump chamber under conditions and sucking liquid into the pump chamber;
The discharge from the secondary side on-off valve in a state where the flow path of the primary side pipe is closed by the primary side on-off valve and the flow path of the secondary side pipe is opened by the secondary side on-off valve. while preventing the negative pressure by the stop portion provided on until the tip of the nozzle is transmitted to the pump chamber, the object to be injected was liquid in the pump chamber by contracting the pump chamber from the discharge nozzle possess the injection for supplying the injection process,
The liquid supply method , wherein when the liquid injection into the injection target is stopped, the closing operation of the secondary side on-off valve is made earlier than the stop of driving of the pump driving member .

A liquid supply apparatus for supplying a liquid to an injection object held in a negative pressure atmosphere,
A pump chamber communicating with a primary side pipe connected to a liquid storage tank for storing liquid and a secondary side pipe connected to a discharge nozzle for injecting liquid into an injection target; A liquid supply pump provided with a pump drive member that sucks the liquid in the liquid storage tank into the pump chamber and contracts the pump chamber to discharge the liquid from a discharge nozzle;
A primary side on-off valve provided in the primary side pipe, which opens the flow path of the primary side pipe when the pump chamber is expanded, and closes the flow path of the primary side pipe when the pump chamber is contracted When,
The secondary pipe is provided in the secondary pipe and closes the flow path of the secondary pipe when the pump chamber is expanded, and opens the flow path of the secondary pipe when the pump chamber is contracted. A secondary opening / closing valve;
In between the said secondary side switching valve to the tip of the discharge nozzle, a negative pressure is under the process of injecting a liquid by contracting the pump chamber within the object implant is transmitted to the pump chamber It possesses a throttle portion to prevent the that,
The liquid supply apparatus characterized in that the opening operation of the secondary side on-off valve is delayed from the start of driving of the pump driving member at the start of liquid injection into the injection target .

5. The liquid supply apparatus according to claim 4 , wherein when the liquid injection into the injected object is stopped, the closing operation of the secondary-side on-off valve is made earlier than the drive stop of the pump driving member. .

A liquid supply apparatus for supplying a liquid to an injection object held in a negative pressure atmosphere,
A pump chamber communicating with a primary side pipe connected to a liquid storage tank for storing liquid and a secondary side pipe connected to a discharge nozzle for injecting liquid into an injection target; A liquid supply pump provided with a pump drive member that sucks the liquid in the liquid storage tank into the pump chamber and contracts the pump chamber to discharge the liquid from a discharge nozzle;
A primary side on-off valve provided in the primary side pipe, which opens the flow path of the primary side pipe when the pump chamber is expanded, and closes the flow path of the primary side pipe when the pump chamber is contracted When,
The secondary pipe is provided in the secondary pipe and closes the flow path of the secondary pipe when the pump chamber is expanded, and opens the flow path of the secondary pipe when the pump chamber is contracted. A secondary opening / closing valve;
In between the said secondary side switching valve to the tip of the discharge nozzle, a negative pressure is under the process of injecting a liquid by contracting the pump chamber within the object implant is transmitted to the pump chamber It possesses a throttle portion to prevent the that,
The liquid supply apparatus characterized in that when the liquid injection into the injection target is stopped, the closing operation of the secondary side on-off valve is made earlier than the stop of the driving of the pump driving member .

The liquid supply apparatus according to claim 4, wherein the throttle unit is a variable throttle that adjusts an inner diameter of the discharge nozzle.

8. The liquid supply apparatus according to claim 4, wherein the secondary side opening / closing valve is an air operated valve that opens and closes each flow path by air pressure. 9.

8. The liquid supply apparatus according to claim 4, wherein the throttle unit is a variable throttle that adjusts a length of a flow path of the discharge nozzle. 9.

The liquid supply apparatus according to any one of claims 4 to 7, wherein the secondary side on-off valve is an electromagnetic valve.

The liquid supply apparatus according to any one of claims 4 to 6, further comprising a controller that controls the primary side on-off valve, the secondary side on-off valve, and the pump drive member.