JPH09225288A - Liquid supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve current efficiency by constituting an electrochemical cell so as to arrange an anode, a cathode and an electrolyte of an ion exchange film and using an electrode made of a catalystic metal plated metallic porous body as the anode and/or the cathode in a liquid supply device for injecting a liquid by utilizing electrochemical system. SOLUTION: The liquid crystal supply device is formed by housing a baggy body 12 in a closed vessel 15 and a gas generated from the electrochemical cell 18 is stored in a pressure transmitting part 16 between the baggy body 12 and the closed vessel 15. And when the internal pressure of the pressure transmitting part 16 is increased by the supply of the gas generated in the electrochemical cell 18, the baggy body 12 is shrunk to supply the liquid in the baggy body 12 to the outside from a liquid supply port 14. The electrochemical cell 18 is provided with the anode 2, the cathode 3 and the electrolyte of the ion exchange film 1 causing ion conductivity by the hydration and the anode 2 and/or the cathode 3 are the electrodes made of the catalysing metal plated metallic porous body, which are in close contact with the ion exchange film 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid supply device for accurately supplying a fluid.

[0002]

2. Description of the Related Art In recent years, a fluid supply device has come to be used for injecting a small amount of a fluid by using an electrochemical method and accurately.

One of the inventors of the present application utilizes an electrochemical cell which generates a gas in an amount proportional to the current value by passing a direct current, and has an apparatus having a pump function and a gas flow rate control function. Proposed (Japanese Patent No. 121
4001), and an electrochemical infusion pump utilizing this principle has been proposed (H.R.M.Maguette, US Pat. No. 4,522,698).

This electrochemical infusion pump has an electrochemical cell in which porous gas diffusion electrodes are joined to both sides of a hydrated cation exchange membrane which functions as an electrolyte, and hydrogen is supplied to the anode of the electrochemical cell. When a DC current is supplied between the positive and negative electrodes, hydrogen becomes hydrogen ions at the anode, and the generated hydrogen ions pass through the cation exchange membrane to reach the cathode side, where an electrochemical reaction occurs in which hydrogen is generated. It takes advantage of what happens. That is, the pressurized hydrogen generated at the cathode is used as a drive source for pushing the piston, diaphragm, bellows and the like.
It is also possible to use oxygen as a reactant of this electrochemical cell instead of hydrogen, and if air is used as the oxygen source to be supplied to the cathode, the structure of the infusion pump will be quite simple.

The infusion pump utilizing such an electrochemical system can be used not only for supplying medical drugs but also for supplying any fluid such as gas or liquid. The electrochemical fluid supply device is suitable for supplying a very small amount of fluid with high accuracy because the fluid supply rate can be determined by the magnitude of the electric current applied to the electrochemical cell.

As the electrochemical cell used in this electrochemical fluid supply device, various types other than the system described above are conceivable. One of them is porous platinum on both sides of a hydrated cation exchange membrane. A water electrolysis cell using an electrolysis reaction of water, to which an electrode is attached (JP-A-2-3022)
64). As a method for attaching a platinum electrode to a cation exchange membrane, an electroless plating method is often used (JP-A-55-38934). The electrode reaction when a direct current is applied to this water electrolysis cell is as follows. Cathode: 4H ⁺ + 4e ⁻ → 2H ₂ Anode: 2H ₂ O → 4H ⁺ + O ₂ + 4e ⁻ Total reaction: 2H ₂ O → 2H ₂ + O ₂ That is, at the anode, water is decomposed into oxygen and protons, and protons are cations. It reaches the cathode through the exchange membrane where it becomes hydrogen. In this way, in the water electrolysis cell, oxygen is generated from the anode and hydrogen is generated from the cathode when electricity is applied, so either oxygen or hydrogen, or both oxygen and hydrogen are used as the pressure source of the fluid supply device. can do.

In this water electrolysis cell, when the current efficiency is 100% at 25 ° C. and 1 atm, oxygen is discharged from the anode at 2%.
28 ml and 456 ml of hydrogen are generated from the cathode.

[0008]

A conventional electrochemical cell having a porous platinum electrode attached by electroless plating is usually
Since it was used in the range where the current density was higher than several hundreds mA / cm ² , the current efficiency of gas generation (the actual gas generation amount relative to the theoretical gas generation amount calculated from the amount of electricity supplied) was almost 100%. Efficiency was never an issue.

However, in the electrochemical fluid supply device, since the range of the fluid supply amount per unit time is wide, the current density used is about 1 mA / cm ^{2 although} it depends on the electrode area of the electrochemical cell. In some cases. The inventors of the present application obtained the results shown in FIG. 1 by obtaining the relationship between the current density and the current efficiency of gas generation in the water electrolysis cell in which the porous platinum electrode was attached by the electroless plating method. And
It was confirmed that the current efficiency of gas generation changes depending on the current density, and becomes smaller than 100% when the current density is small.

Therefore, when the current density is low, in the fluid supply device using the electrochemical cell in which the electrode is attached by the conventional electroless method, the fluid supply amount per unit time can be determined by the current. The advantages of the conventional fluid supply system will be lost.

[0011]

DISCLOSURE OF THE INVENTION The present inventors have found that in a conventional electrochemical cell in which a porous electrode is bonded to an ion exchange membrane by an electroless plating method, the gas generation current efficiency is 100.
Several measurements were performed to clarify the reason why it did not reach 100%.

First, as an ion exchange membrane, Nafion 1
When 17 films were used and platinum electrodes were joined by electroless plating, the amount of recombination of oxygen and hydrogen through the film was measured. As previously reported, the gas permeability coefficient of the Nafion 117 membrane changes depending on the water content, and the value when the water content is 102% is as follows [Osaka Industrial Technology Institute Quarterly Report 36 81 (1985). )].

Hydrogen 70 × 10 ⁻¹⁰ cm ³ · cm / cm ² · sec · cmHg Oxygen 32 × 10 ⁻¹⁰ cm ³ · cm / cm ² · sec · cmHg Bonding of porous platinum electrodes to both sides of the Nafion membrane , Already reported [The Electrochemical Society 52nd Annual Meeting Proceedings
P358 (1985)], an adsorption process for substituting a platinum ammine complex ion with a proton of a sulfonic acid group, a reduction process with sodium borohydride, and a growth process with a mixed plating bath of chloroplatinic acid and hydrazine.

Next, the Nafion membrane bonded with the porous platinum electrode was set in the measuring device shown in FIG. In FIG. 2, 21 is a Nafion membrane having porous platinum electrodes bonded on both sides, 22 is a hydrogen chamber, 23 is an oxygen chamber, 24 is an acrylic pipe, 25 is an acrylic membrane scissors component, and 26 is a bolt. Further, 27 is water and 28 is a container.

The hydrogen chamber 22 and the oxygen chamber 23 on both sides of the Nafion membrane were filled with hydrogen and oxygen at 1 atm, respectively, and the time-dependent changes in the volume reduction of the compartments on both sides were measured. The results shown in FIG. Got

According to this result, the reduction amount of hydrogen is about twice as much as that of oxygen, each gas passes through the Nafion membrane, and platinum of the electrode serves as a catalyst to recombine oxygen and hydrogen. Proved to return to water.

It should be noted that oxygen and hydrogen were not reduced at all with only the Nafion film without the platinum electrode bonded. When the rate of this recombination was converted into electric current, it was found to correspond to 0.263 mA per cm ² .

Next, the Nafion film to which the platinum electrode was joined was sandwiched by a metal, and a leak current was measured when a voltage of 1.0 V was applied so that water was not decomposed. As a result, the leak current was about 0.06 mA / cm ² . In an actual electrochemical cell, a voltage of about 2V is applied, so it is estimated that the leak current will be larger.

Then, when the distribution state of platinum particles in the cross section of the Nafion film to which the porous platinum electrode was bonded was observed by EPMA, the results shown in FIG. 4 were obtained.

In FIG. 4, black dots indicate the presence of platinum particles, and it was found that the platinum particles were mainly distributed near the surface in a large amount, but the platinum particles were distributed to the inside of the film. It was clarified that, when pressure was applied from both sides, these were connected and a micro short circuit occurred, which caused the leak current.

From the above experimental results, in the conventional electrochemical cell using the Nafion membrane to which the porous platinum electrode is bonded, the current efficiency of gas generation is 1 when the current density is small.
It was found that the reason why it did not become 00% was the recombination of hydrogen and oxygen through the ion exchange membrane and the leak current.

That is, the object of the present invention is to have a simple structure,
It is inexpensive, easy to handle, and has a gas generation current efficiency of almost 100% even when the current density is low.
Another object of the present invention is to provide a fluid supply device.

[0023]

A fluid supply apparatus according to the present invention comprises a fluid storage section, a pressure transmission section, and an electrochemical cell section, and applies a direct current to the electrochemical cell of the electrochemical cell section. The gas generated by is introduced into the pressure transmission part, the fluid storage part is pressed by the introduction of the gas, and the fluid is supplied from the fluid supply port, and the electrochemical cell includes an anode and a cathode. And an electrolyte that is an ion-exchange membrane that produces ionic conductivity due to water content, and the anode or / and the cathode that generate gas are electrodes in which a metal for a catalyst is plated on a metal porous body, The electrode is characterized by being pressed against the electrolyte.

The structure of the fluid supply apparatus according to the present invention is such that the fluid is pressed by the pressure of the gas generated by applying a direct current to the electrochemical cell of the electrochemical cell section and the fluid is supplied from the fluid supply port. Anything is sufficient.

For example, a mold provided with a fluid storage unit, a pressure transmission unit and an electrochemical cell unit in the container, or a fluid storage unit and a pressure transmission unit are provided in the container, and the electrochemical cell unit is provided with the container. A mold having a detachable structure, or a bag-like body having a fluid storage part having two spaces, a first space connected to an electrochemical cell part, and a second space capable of storing a fluid. The type may be such that when the generated gas is introduced into the first space, its pressure is transmitted to the second space, and the fluid is projected from the supply port due to the reduction of the space. In this case, only the partition wall that divides the two spaces may be made of a material that is deformed by pressure, or the entire material may be made of a material that is deformed by pressure. Further, in the above, the electrochemical cell portion may be an electrochemical cell, and the power source and the like may be connected as an external device.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION A water electrolysis cell will be described as an example of the structure of an electrochemical cell portion used in a fluid supply apparatus according to the present invention. FIG. 5 is a diagram showing a cross-sectional structure of the water electrolysis cell according to the present invention. In the figure, 1 is a cation exchange membrane acting as an electrolyte, 2 is platinum-plated expanded titanium as an anode, 3 is platinum-plated expanded titanium as a cathode, 4 is an anode current collector, and 5 is a cathode current collector. A body, 6 is an anode lead wire, 7 is a cathode lead wire, 8 is a packing, 9 is a cell container, 10 is an oxygen passage, and 11 is a hydrogen passage.

When a direct current is applied to the water electrolysis cell of this structure, the same reaction as in a conventional water electrolysis cell in which porous platinum electrodes are joined by electroless plating occurs, water is consumed in the anode 2, and the anode 2 Oxygen is generated from the cathode and hydrogen is generated from the cathode 3, so these gases are used for pressurizing the fluid supply.

The material of the electrode pressed against the ion exchange membrane is not limited to titanium, and any material that is not affected by the ion exchange membrane used can be used, and the shape is not limited to expanded. Mesh plate, thin plate with fine holes, plate combining fibrous metal, etc.
Any shape can be used as long as it has holes through which gas can pass. Further, as the material for plating the porous metal, in addition to platinum, a metal having a catalytic action such as palladium can be used.

In the electrochemical cell according to the present invention in which a porous metal electrode plated with platinum or the like is pressed against an electrolyte,
The current efficiency of gas generation is such that the current density is 0.2 mA / cm ²
Is larger than 10 regardless of the current density.
0%. The reason is that the catalytic activity of platinum and other metals plated on porous metal is very weak compared to porous platinum attached by electroless plating, and even if oxygen and hydrogen pass through the ion exchange membrane and mix, This is because the possibility of recombining is very small, and since there is no metal particle in the ion exchange membrane without electroless plating, there is no possibility of internal short-circuiting, and therefore no leak current flows.

In the case of a press-contacted structure, the compressed state is preferably about 30 kg / cm ² .

The electrochemical cell that can be used in the present invention generally uses an ion-exchange membrane that exhibits ionic conductivity by containing water as an electrolyte, and when a direct current is applied, a gas is generated in proportion to the amount of electricity applied. If so, any cell can be used. In addition to the above-mentioned water electrolysis cell, the following cells can be used.

1) In a cell in which an anode is pressed against one side of a cation exchange membrane and a metal oxide electrode such as manganese dioxide is attached as a cathode, when the direct current is applied to both electrodes, the following reaction occurs.

Cathode: 4MnO ₂ + 4H ⁺ + 4e ⁻ → 4MnOOH Anode: 2H ₂ O → O ₂ + 4H ⁺ + 4e ⁻ Total reaction: 4MnO ₂ + 2H ₂ O → 4MnOOH + O _{2 At the} anode, water is electrolyzed to generate oxygen. Oxygen is used as a pressure source. The hydrogen ions generated at the anode reach the cathode through the cation exchange membrane and react with the metal oxide. In the case of this cell, since no gas is generated from the cathode side, the cathode side can have a closed structure. 2) When a direct current is applied to a water electrolysis cell in which electrodes are pressed against both sides of an anion exchange membrane, the following reaction occurs.

The _{^{anode: 4OH - → O 2 + 2H}} 2 O + 4e - ^{_{cathode: 4H 2 O + 4e - →}} 2H 2 + 4OH - Total reaction: In the _{2H 2 O → 2H 2 + O} 2 The water electrolysis cell decomposes water at the cathode It becomes hydrogen and hydroxide ions, and the hydroxide ions reach the anode through the anion exchange membrane where they become oxygen and water, and this oxygen is used as a pressure source. 3) In a cell in which an anode is pressed against one side of an anion exchange membrane and a metal oxide electrode such as manganese dioxide or nickel oxyhydroxide is attached as a cathode, the following reaction occurs when a direct current is applied to both electrodes.

Cathode: 4MnO ₂ + 4H ₂ O + 4e ⁻ → 4
MnOOH + 4OH ^{- _{anode: 4OH - → O 2 + 2H}} 2 0 + 4e - All reactions: 4MnO In _{2 + 2H 2 O → 4MnOOH +} O 2 the cell to generate hydroxyl ions in the cathode is electrolytic water, hydroxide ion anion exchange membrane Since it reaches the anode through it and becomes oxygen and water, this oxygen is used as a pressure source. Also in the case of this cell, the cathode side can have a closed structure.

Next, the operating principle of the fluid supply apparatus according to the present invention will be described with reference to FIG.

FIG. 5 is a cross-sectional view of the fluid supply device according to the present invention in use, in which 12 is a bag-like body as a fluid storage portion, 13 is a fluid, 14 is a fluid supply port, and 15 is a bag. It is an airtight container that contains a body inside and is made of a hard material that does not deform under the pressure of gas. 18 is an electrochemical cell. The pressure transmission part 16 is formed in the inner surface space between the outer surface of the bag-shaped body 12 and the closed container 15, and the gas generated from the electrochemical cell 18 is accumulated in the pressure transmission part 16. Also, 1
Reference numeral 7 is a pressure transmission part 1 for the gas generated from the electrochemical cell 18.
Reference numeral 19 is a power supply, and 20 is a switch.

Here, the electrochemical cell 18 and the power source 1 are used.
9 and the switch 20 are the electrochemical cell unit 100.

In using this fluid supply device, first, the switch 20 is turned on to apply a direct current to the electrochemical cell 18, and the gas generated from the electrochemical cell 18 at that time is passed through the gas introduction pipe 17 to the pressure transmission portion 16. To introduce. Then, the pressure inside the pressure transmission part 16 rises and pushes the inner surfaces of the bag-shaped body 12 and the closed container 15, but the closed container 15
Is made of a material that is not deformed by the pressure of gas, so that only the bag-shaped body 12 is deformed in the contracting direction. The deformation of the bag-shaped body 12 is started almost at the same time when the gas is introduced into the pressure transmission section 16. As a result, the fluid 13 inside the bag-shaped body 12 is pushed out and supplied from the fluid supply port 14 to the outside. Then, when the gas is continuously generated from the electrochemical cell 18, the fluid 13 inside the bag-shaped body 12 is continuously supplied to the outside from the fluid supply port 14.

A backflow prevention valve may be provided at the fluid supply port 14, or the electrochemical cell unit 100 may be directly attached to the closed container 15 and the gas introduction pipe 17 may be omitted.

In addition, the electrochemical cell 18 or the cell portion 100 may be arranged in the closed container or the pressure transmitting portion.

Furthermore, a direct current is required for the operation of the electrochemical cell, but a large current is required when a relatively large amount of fluid needs to be supplied. A direct current may be supplied to the electrochemical cell.
On the other hand, when supplying a small amount of fluid of about 1 ml per hour, a small battery may be used as the power source. When such a small battery is used, the battery and the electrochemical cell are directly attached to the end portion of the container, and the fluid supply device becomes portable. That is, the electrochemical cell unit 100 may have a removable structure.

The fluid supply device of the present invention is most suitable for medical purposes for supplying a medicinal solution to a patient, but can also be applied to industrial and other fluid supply such as liquid and gas.

[0044]

The structure and method of use of the fluid supply device according to the present invention will be described in detail with reference to preferred embodiments.

[Embodiment 1] FIG. 6 shows a sectional structure in a state of being in use.

A fluid supply device was manufactured using a bag-shaped body made of an organic polymer sheet as the fluid storage section and a water electrolysis cell as the electrochemical cell.

In FIG. 6, 12 is a bag-like body for storing a fluid, made of polyvinyl chloride and having a size of 70 mm × 5.
The thickness was 0 mm and the thickness was 0.5 mm, and the edges of the sheet were integrated by heat fusion. 13 is a fluid, here about 30 ml
Physiological saline was used. A fluid supply port 14 is made of polyvinyl chloride and has dimensions of an outer diameter of 5 mm and an inner diameter of 4 mm. Reference numeral 15 is an acrylic hermetically-sealed container having a bag-shaped body housed therein, and the internal dimensions are 60 mm × 40 mm × 15 mm, and the hermetically-sealed container is not deformed by the pressure of gas. The pressure transmission part 16 is formed by the outer surface of the bag-shaped body 12 and the inner surface of the closed container 15, and the gas generated from the electrochemical cell is accumulated in the pressure transmission part 16. In the state before use, physiological saline 13
Since the bag-shaped body 12 filled with (1) spreads over almost the entire inside of the closed container 15, the volume of the pressure transmission section 16 is small. 17 is a gas introduction pipe, made of polyvinyl chloride,
The outer diameter was 5 mm and the inner diameter was 4 mm. 18 is an electrochemical cell, 19 is a power supply, which is a combination of a battery and a resistor, and 20 is a switch.

As the electrochemical cell, a water electrolysis cell whose sectional structure is shown in FIG. 5 was used.

In FIG. 5, reference numeral 1 denotes an ion exchange membrane which acts as an electrolyte, and a solid polymer proton conductor having a diameter of 12 mm was used. 2 is an anode, 3 is a cathode, and both have a diameter of 8
mm of platinum-plated expanded titanium and pressed against both sides of the solid polymer proton conductor. 4 is an anode current collector, 5 is a cathode current collector, 6 is an anode lead wire, 7 is a cathode lead wire, and 4 to 7 are all made of titanium. 8
Is a silicone packing, 9 is a cell container, and the material is acrylic. Reference numeral 10 is an oxygen passage, and 11 is a hydrogen passage.

When this fluid supply device is used for supplying physiological saline, for example, when a switch 20 is turned on and a direct current of 50 mA is passed from the power source 19 to the electrochemical cell 18, water is discharged in the electrochemical cell 23. When the electrolysis reaction occurs and oxygen generated from the anode is introduced into the pressure transmission unit 16 that accumulates gas through the gas introduction pipe 17, the volume of oxygen inside the pressure transmission unit 16 increases by continuing to supply electricity. The bag-shaped body 12 is deformed in the contracting direction, and the bag-shaped body 1
The physiological saline 13 inside 2 is pushed out, and is supplied from the fluid supply port 14 to the outside at a rate of 10 ml per hour. Then, the volume of oxygen in the pressure transmission section 16 increases, and at the same time, the bag-shaped body 12 contracts, the physiological saline 13 therein is supplied to the outside, and the amount thereof decreases.

When hydrogen generated from the cathode is used as the gas introduced into the pressure transmission section 16, the current is 2
The current may be 5 mA, and the current may be 17 mA when oxygen and hydrogen are simultaneously introduced. [Example 2] A fluid supply device was produced in which an electrochemical cell was directly attached to a sealed container having a bag-shaped body housed therein. In this case, the gas introduction pipe is unnecessary. When the same electric current as in Example 1 was passed, the physiological saline was supplied at the same rate.

Example 3 A fluid supply device having the same structure as in Example 1 was prepared in which a fluid inlet and a fluid supply port were separately attached to a bag-shaped body as a fluid storage unit. When the same electric current as in Example 1 was passed, the physiological saline was supplied at the same rate.

[Embodiment 4] A fluid supply device having a structure similar to that of Embodiment 1, in which a check valve was attached to the fluid supply port, was manufactured. In this device, there was no liquid leakage from the fluid supply port when not in use, and the liquid supply was stopped even if the pressure outside the fluid supply port was reduced during use.
With this structure, it is also possible to use gas as a fluid instead of liquid.

[0054]

The fluid supply device according to the present invention determines the supply amount of the target fluid according to the gas generated from the electrochemical cell. Even if the current density is small, the current efficiency of gas generation is almost 100%, so the amount of gas generated from the electrochemical cell can be set by the amount of electricity supplied, in other words (current × time). , The supply amount per unit time is the value of current, and when a constant current is applied, the total supply amount can be determined by time, so that the fluid can be supplied accurately with a very simple method. It is a thing.

Further, the fluid supply device according to the present invention can be provided with a hermetically-sealed container having a fluid storage section housed therein, an electrochemical cell and a power source, and is small in size as a whole.
It can be made lightweight and is extremely convenient for carrying in a pocket of clothes.

Further, the fluid supply device according to the present invention is easy to operate in use, and is extremely easy to use for a patient, particularly when used for supplying a medical drug solution.

As described above, the fluid supply device according to the present invention has a simple structure, is inexpensive, and is easy to handle.
Its industrial value is extremely high.

[Brief description of drawings]

FIG. 1 is a diagram showing a relationship between current density and current efficiency of gas generation in a conventional water electrolysis cell.

FIG. 2 is an explanatory diagram showing an apparatus for measuring the amount of recombination of oxygen and hydrogen through an ion exchange membrane.

FIG. 3 is a diagram showing the amount of recombination of oxygen and hydrogen through a Nafion membrane having a porous platinum electrode attached thereto by an electroless plating method.

FIG. 4 is a diagram showing a distribution of platinum particles in a thickness direction in a Nafion film having a porous platinum electrode attached thereto by an electroless plating method.

FIG. 5 is a view showing a cross section of an electrochemical cell used in the fluid supply device according to the present invention.

FIG. 6 is a diagram showing a cross-section of a fluid supply device according to the present invention during use.

[Explanation of symbols]

 1 Ion Exchange Membrane 2 Anode 3 Cathode 12 Bag 16 Pressure Transmitter 18 Electrochemical Cell 100 Electrochemical Cell

Claims (9)

[Claims] 1. A fluid storage unit, a pressure transmission unit, and an electrochemical cell unit, wherein a gas generated by applying a direct current to an electrochemical cell of the electrochemical cell unit is introduced into the pressure transmission unit, In the fluid supply device in which the fluid storage unit is pressed by the introduction of the gas and the fluid is supplied from the fluid supply port, the electrochemical cell is composed of an anode, a cathode, and an ion exchange membrane that produces ion conductivity due to water content. A certain electrolyte is provided, and the anode or / and the cathode that generate gas are electrodes in which a metal for a catalyst is plated on a metal porous body, and the electrodes are pressed against the electrolyte. Fluid supply device. 2. The fluid supply device according to claim 1, wherein the porous metal body is expanded titanium. 3. The fluid supply device according to claim 1, wherein the catalytic metal plated on the porous metal body is platinum. 4. The gas generated from the electrochemical cell section is hydrogen and / or oxygen.
Or the fluid supply device according to 3. 5. The fluid storage part is provided in the container, and the sealed space formed by the container and the outer surface of the fluid storage part is a pressure transmission part. Fluid supply device. 6. The fluid supply device according to claim 5, wherein the electrochemical cell portion is provided outside the pressure transmission portion or the container and is detachably attached. 7. The fluid supply device according to claim 6, wherein the gas generated from the electrochemical cell is introduced into the pressure transmission section via a tube. 8. The fluid supply port is an injection port for injecting a fluid into a fluid storage unit in advance.
The fluid supply device according to 2, 3, 4, 5, 6 or 7. 9. A fluid injection port is provided separately from the fluid supply port.
Or the fluid supply device according to item 8.