JP2003208888A - Electrolyte filling device and electrolyte filling method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrolyte filling device capable of efficiently filling the predetermined quantity of the electrolyte into a battery container without damaging the battery container. <P>SOLUTION: This electrolyte filling device is provided with a filling nozzle 24 liquid-tightly inserted into a filling port 52 of the battery container 50, an electrolyte piping 26 for connecting a measure pump 22 and the filling nozzle 24 to each other, a valve provided in the electrolyte piping 26, and a pressure sensor 27 for detecting the pressure of the electrolyte inside of the electrolyte piping 26. The measure pump 22 is provided with a cylinder 22a for housing the electrolyte E, a plunger 22b inserted into the cylinder 22a, a servo motor 22c for driving the plunger 22b in response to the insertion quantity of the plunger 22b, and a control unit 40 for controlling the operation of the servo motor 22c. The control unit 40 is set to control the pressure inside of the electrolyte piping 26 detected by the pressure sensor 27 within the predetermined range. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrolytic solution injecting device for injecting an electrolytic solution into a battery container, and more particularly to a device suitable for small size and high capacity type batteries.

[0002]

2. Description of the Related Art A liquid injection method for injecting an electrolytic solution into a battery container, which is used for a small-sized and high-capacity battery, for example, a prismatic aluminum material having a thickness of about 0.3 mm or less, has been conventionally used. . As a conventional liquid injection method, a nitrogen pressurization method (for example, refer to Patent Document 1) and a liquid pressurization method (for example, refer to Patent Document 2) are known.

In the nitrogen pressurization method, the inside of the battery container is 5 torr.
The pressure is reduced to not more than r, and the inside of the upper reservoir that is connected to the battery container and stores the electrolyte is 200 torr.
After the pressure is reduced to 1, the differential pressure causes the electrolytic solution to be introduced into the battery container in a laminar flow. After that, the remaining electrolytic solution is introduced by pressurizing nitrogen gas, and at the same time as pressurizing, gas is also applied outside the container to prevent deformation of the battery container, which is an aluminum can.

In the liquid pressurizing method, the battery container housed in the chamber is decompressed together with the chamber, and then the liquid inlet of the battery container is pressed against the liquid injection nozzle, and the electrolyte is forced by a motor-driven metering pump. To put it in the battery container. After that, the chamber is pressurized so that the electrolytic solution remaining in the vicinity of the injection port is also put into the battery container without waste.

On the other hand, the electrolytic solution injecting device constitutes a part of the electrolytic solution injecting system. That is, the electrolyte injection system is composed of a pre-weighing device that measures the weight of the battery container before injection, an electrolyte injection device, and a post-weighing device that measures the weight of the battery container after injection. Each of these devices is arranged in three independent rooms, and each room has a closed structure that is separated from the outside air. The battery container was transported between these devices while being held by an air chuck or the like.

[0006]

[Patent Document 1] Japanese Patent Laid-Open No. 11-73942 (FIG. 1)

[0007]

[Patent Document 2] Japanese Patent Laid-Open No. 2000-182599 (FIG. 1)

[0008]

The above-mentioned method for injecting the electrolytic solution has the following problems. That is, in the nitrogen pressurization system, the battery container contracts due to the depressurization before the liquid injection, which may reduce the amount of electrolyte injected. Also,
Since the pressure is applied from the outside of the battery container at the same time as the pressure is applied, there is a problem that if the pressure is increased, the electrolytic solution flows back and is pushed back. Further, in order to completely fill the battery container with the electrolytic solution that could not be filled due to the differential pressure and the reverse flow, for example, 0.2
Although there is no choice but to pressurize at a pressure value of about MPa that does not backflow, since the nitrogen gas is compressible, the electrolytic solution cannot be fully filled unless the time is taken, and the pressurizing time is greatly extended.

On the other hand, in the liquid pressurizing system, when the plunger is driven by the metering pump to push the electrolyte solution, the internal pressure in the battery container (pressure on the outlet side of the metering pump) is 1.0.
There has been a problem that the control system of the motor is out of step due to the reaction of the internal pressure when driving a pulse motor or the like by jumping up to MPa or more. Also, even if air bubbles are mixed and accumulated in the liquid path, the air bubbles cannot be removed, and the air bubbles contract or expand, resulting in insufficient liquid injection amount and variation in liquid injection amount. Was becoming.

Further, since the battery container is made of an aluminum material, due to a grip error by an air chuck used in the carrying process from the front weighing device and the carrying process to the rear weighing device,
This caused a decrease in yield due to a decrease in operating rate and generation of dents and scratches on the battery container. Further, since the electrolytic solution injecting device is divided into one room, when performing maintenance such as cleaning of the electrolytic solution, the entire electrolytic solution injecting system must be stopped. Further, since the electrolytic solution is a non-aqueous electrolyte, it is necessary to manage the water content in each room for each maintenance. Therefore, in order to perform maintenance, it is necessary to stop the entire system for half a day, which causes a decrease in operating rate.

On the other hand, in the liquid pressurizing method, when the electrode tab is used to inject liquid into a cylindrical battery container protruding from the liquid injection port, an escape hole for the electrode tab is required in the liquid injection nozzle. Since the electrolytic solution remains in this clearance hole, the measured electrolytic solution cannot be completely injected into the battery container, a loss of about 0.3 to 0.5 g occurs, or a variation of the injected amount of 0.3 g or more occurs. Etc. occur,
This was an obstacle to improving the accuracy of the injection volume. Further, there is a problem that the electrode tab is wet with the electrolytic solution immediately after the liquid injection, and the sealing body cannot be stably welded to the electrode tab in the sealing body welding step which is a subsequent step.

Therefore, an object of the present invention is to provide an electrolytic solution injecting device which can efficiently inject a predetermined amount of electrolytic solution into a battery container and does not damage the battery container.

[0013]

In order to solve the above problems and achieve the object, the electrolytic solution injecting apparatus and the electrolytic solution injecting method of the present invention are configured as follows.

(1) In an electrolytic solution injecting device for injecting an electrolytic solution into a battery container, a metering pump for sucking a predetermined amount of electrolytic solution and a liquid-tightly inserted injection port in the battery container. Liquid nozzle, decompression means for decompressing the inside of the battery container, electrolytic solution conduit connecting the metering pump and the liquid injection nozzle, a valve provided in the electrolytic solution conduit, and the electrolytic solution conduit A pressure sensor for detecting the pressure of the electrolytic solution inside, the metering pump, a cylinder for accommodating the electrolytic solution, the plunger inserted into the cylinder by the insertion amount, and a servo for driving the plunger. A motor and a control unit for controlling the operation of the servomotor are provided, and the control unit controls so that the pressure in the electrolytic solution passage detected by the pressure sensor does not exceed a predetermined pressure. Set as Characterized in that it is.

(3) In the electrolytic solution injecting apparatus described in (1) above, the decompression means includes a decompression pump, an atmosphere release valve, and a gas pipeline connected to a pressure pump, and the valve is provided. Is characterized in that the outlet side is connected to the liquid injection nozzle, and the inlet side is a three-way valve that switches between the electrolytic solution line and the gas line.

(4) In the electrolytic solution injecting method of injecting the electrolytic solution into the battery container, a storing step of storing a predetermined amount of electrolytic solution in the cylinder of the metering pump, and a depressurizing step of depressurizing the inside of the battery container. And a nozzle insertion step of liquid-tightly inserting a liquid injection nozzle connected to the metering pump via an electrolyte pipe line into a liquid injection port of the battery container, and pushing a plunger driven by a servomotor into the cylinder. It comprises a plunger driving step of sending the stored electrolytic solution to the injection nozzle, and a pressure detecting step of detecting the pressure of the electrolytic solution in the electrolytic solution conduit, wherein the plunger driving step is the pressure. Is controlled so that the pressure does not exceed a preset pressure.

(5) In the electrolytic solution injecting method of injecting the electrolytic solution into the battery container, the accommodating step of accommodating a predetermined amount of the electrolytic solution in the cylinder of the metering pump and the electrolytic solution conduit in the metering pump. Inside the battery container by switching the injection nozzle connected through the liquid injection nozzle to the injection port of the battery container in a liquid-tight manner, and switching the inlet side of the injection nozzle to the gas pipeline connected to the vacuum pump. Depressurizing step for depressurizing, and switching the inlet side of the liquid injection nozzle to the electrolytic solution pipe line, and pushing the plunger driven by the servomotor into the cylinder, the electrolytic solution stored in the liquid injection nozzle. A plunger driving step of feeding, a feeding step of feeding the electrolytic solution in the liquid injection nozzle into the battery container by switching the inlet side of the liquid injection nozzle to a gas pipeline connected to a pressure pump, The inlet side of the liquid nozzle, characterized in that switched to a gas pipeline connected to the air release valve and a releasing step of returning the battery container to the atmospheric pressure.

(6) The electrolytic solution pouring method according to (4) above, further comprising an electrolytic solution evaporation step of evaporating the electrolytic solution by sandwiching the electrode of the battery container with a heated sandwiching tool. It is characterized by having.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram schematically showing an electrolytic solution injection device 10 according to a first embodiment of the present invention. The electrolytic solution injecting device 10 adopts a liquid pressurizing method. The electrolytic solution injection device 10 includes an electrolytic solution supply unit 20, a battery container housing unit 30, and a control unit 40. In the figure, 50 is a battery container, and 60 is a transport container.

The electrolytic solution supply unit 20 includes a tank 21 containing the electrolytic solution and a metering pump 22 driven by a pulse motor.
And a pair of liquid injection valve 23 and liquid injection nozzle 24. The tank 21 and the metering pump 22 are connected to the electrolytic solution line 2
5. The metering pump 22 and the liquid injection valve 23 are the electrolytic solution line 2
Connected by 6. The tip of the liquid injection nozzle 24 is shown in FIG.
As shown in (b) of FIG.
The O-ring 24a is formed so as to fit with the No. 2 and is provided in a liquid-tight manner. Further, a pressure sensor 27 and a bubble removing valve 28 are provided in the electrolytic solution conduit 26. In addition, the electrolytic solution lines 25, 26
Are filled with an electrolytic solution E. The output of the pressure sensor 27 is input to the control unit 40.

The metering pump 22 includes a cylinder 22a, a plunger 22b inserted in the cylinder 22a, and a servo motor 22c for driving the plunger 22b. The pulse motor 22c is controlled by the control unit 40. .

The battery container accommodating portion 30 includes a chamber 31 and
The chamber 31 is provided with a holding table 32 that holds the transfer container 60 and moves up and down. A vacuum valve 33, a pressurizing valve 34, and an atmosphere opening valve 35 are connected to the chamber 31.

FIGS. 2A and 2B are perspective views showing a holder 63 for holding the carrier container 60 and the battery container 50. The battery container 50 includes a rectangular parallelepiped container body 51 and a liquid injection port 52 provided on the container body 51. The transport container 60 includes a base 61, a hole 62 provided in the base 61, and a holder 63 detachably fitted in the hole 62. The holder 63 is configured to hold the battery container 50 in a detachable manner, and has a shape that suppresses the bulging of the battery container 50 in order to surely bring the O-ring 24a of the liquid injection nozzle 24 and the liquid injection port 52 into contact with each other. Has become. Also, the battery container 50 is prevented from being scratched, and the electrolytic solution E is
It is made of resin such as peak material in consideration of corrosion prevention.

Electrolyte solution injecting device 10 configured as described above
Injects the electrolytic solution E into the battery container 50 as follows. Note that FIG. 3 is a diagram showing a pressure change in the electrolytic solution conduit 26 by the pressure sensor 27 in the electrolytic solution injecting device 10.

First, in the electrolytic solution supply unit 20, the servo motor 22c is operated and the plunger 22b is operated in the direction of withdrawing from the cylinder 22a, so that a predetermined amount of the electrolytic solution E in the tank 21 is sucked into the metering pump 22. . On the other hand, in the battery container accommodating portion 30, in a state where the chamber 31 is lowered, the transfer mechanism (not shown) transfers and fixes the transfer container 60 on which the weighing process before liquid injection is completed onto the holding table 32.

Next, the liquid injection process is started. The injection process is a section indicated by T in FIG. Holding table 32
The chamber 31 is raised in a state where the temperature is lowered to form a closed container, the vacuum valve 33 is opened, and the inside of the chamber 31 including the inside of the battery container 50 is evacuated to 40 Torr (Ta in FIG. 3). Next, the holding table 32 is raised, the liquid injection nozzle 24 is inserted into the liquid injection port 52 of the battery container 50, and the O-ring 24a is brought into liquid-tight contact.

Next, one of the injection valves 23 is opened, and the electrolysis is performed.
Due to the differential pressure between the liquid conduit 26 and the battery container 50, the electrolytic solution
E injects into one battery container 50. Enter by differential pressure
The electrolyte solution E that is not used activates the metering pump 22,
The changer 22b is pushed in by the servo motor 22c. Foresight
Set pressure (for example, 0.55 MPa / cm^Two )
Is set as the upper limit, and the servo is set so that this pressure is not exceeded.
By controlling the motor 22c, the battery container 5 is gradually
It is pushed to 0 (Tb1 in FIG. 3). When the set value is exceeded
In this case, the servo motor 22c is stopped and the battery container 50
Wait until the electrolyte E penetrates inside and the fluid pressure drops (Fig. 3)
Tb2). And, the plunger 2 only for a predetermined stroke
2b moves and discharges a predetermined amount, then the liquid injection valve 23
Closes and stops the operation of the servo motor 22c.
It As a result, a predetermined amount of electrolytic solution is added to one battery container 50.
E is poured.

Next, the other injection valve 23 is opened, and the electrolytic solution E is injected into the other battery container 50 by the pressure difference between the inside of the electrolytic solution pipe 26 and the inside of the battery container 50. The electrolyte E that cannot be completely filled due to the differential pressure is injected by activating the metering pump 22 and pushing the plunger 22b by the servomotor 22c. Pre-set pressure (eg 0.5
5 MPa) is set as the upper limit, and gradually pushed into the battery container 50. When the set value is exceeded, the servo motor 22c is stopped and the electrolytic solution E permeates into the battery container 50 and waits for the liquid pressure to drop. Then, the plunger 22b moves by the remaining stroke and after discharging a predetermined amount, the liquid injection valve 23 is closed and the servo motor 2
The operation of 2c is stopped. Thereby, the other battery container 5
A predetermined amount of the electrolytic solution E is injected into 0 (Tc in FIG. 3).

Next, in order to prevent the backflow of the electrolytic solution E in the battery container 50, the pressure valve 34 is opened while the holding table 32 is raised and the battery container 5 in the chamber 31 is opened at 0.5 to 0.6 MPa.
Pressure outside 0 (Td in FIG. 3). Then, the atmosphere release valve 28 is opened to return the battery container 50 and the chamber 31 to the atmospheric pressure (Te in FIG. 3), and the holding table 32 is lowered.
Further lowering the chamber 31 terminates the process.

Bubbles accumulated by periodically opening and closing the bubble removing valve 28 are expelled from the electrolytic solution pipe 26.

As described above, according to the electrolytic solution injecting device 10 of the present embodiment, it is possible to prevent the electrolytic solution line 26 and the metering pump 22 from being overloaded by the excessive pressure in the electrolytic solution line 26. Therefore, it is possible to prevent liquid leakage and to accurately control the metering pump 22, and it is possible to inject the electrolytic solution E into the battery container 50 with high accuracy. Further, since the bubbles in the electrolytic solution pipe line 26 can be expelled, it is possible to suppress the insufficiency of the injection amount and the variation in the injection amount. Further, since the transport container 60 prevents the battery container 50 from being deformed due to the injection of the electrolytic solution E, the capacity of the battery container 50 does not change. From the above, it was possible to improve the yield by setting the variation of the liquid injection amount to 3σ = 0.2 g to 0.1 g.

On the other hand, since the pressure in the electrolytic solution pipe line 26 is controlled, it is possible to perform the liquid injection at a relatively high pressure close to the upper limit value, so that the liquid injection process time can be shortened and the efficiency can be improved. Good injection can be performed.

Further, since the battery container 50 is held by the carrier container 60, it is not directly gripped by an air chuck or the like, and it is possible to effectively prevent the generation of dents and scratches. Therefore, it has become possible to produce a high-capacity aluminum can battery without lowering the production number, operating rate, and yield.

FIG. 4 is a diagram schematically showing an electrolytic solution injecting device 100 according to a second embodiment of the present invention, and FIG. 5A shows a part of the injecting nozzle 114 and the battery container 150 cut away. 5B is a side view showing the chuck 133 and the battery container 1.
It is a perspective view which shows 50. The electrolytic solution injecting device 100 includes an electrolytic solution supply section 110, a pressure adjusting section 120, a battery container housing section 130, and a control section 140. In the figure, reference numeral 150 denotes a battery container and 160 denotes a transport container.

The electrolytic solution supply unit 110 includes a tank 111 containing the electrolytic solution and a metering pump 1 driven by a pulse motor.
12, a pair of liquid injection valve 113 and liquid injection nozzle 114
It has and. The tank 111 and the metering pump 112 are connected by an electrolytic solution pipe 115, and the measuring pump 112 and the liquid injection valve 113 are connected by an electrolytic solution pipe 116, respectively. The injection valve 113 has the outlet side of the electrolytic solution line 1
16, a three-way valve whose inlet side can be switched between the liquid injection nozzle 114 and the gas path 121 described later.

The tip of the liquid injection nozzle 114 is formed so as to be fitted with a liquid injection port 152 of a battery container 150, which will be described later, as shown in FIG. Further, the electrolyte conduit 116
A pressure sensor 117 and a bubble removal valve 118 are provided in the. In addition, the electrolytic solution lines 115 and 116 are the electrolytic solution E.
Is filled with. The output of the pressure sensor 117 is the control unit 1.
40 has been entered.

The metering pump 112 includes a cylinder 112a.
And the plunger 11 inserted in this cylinder 112a
2b and a servo motor 112c for driving the plunger 112b, and the pulse motor 112c is controlled by the control unit 140.

The pressure adjusting unit 120 includes a gas pipeline 121 connected to the liquid injection valve 113, a vacuum valve 122, a pressurization valve 123, an atmosphere opening valve 124 connected to the gas pipeline 121, and a gas pipeline. A pressure sensor 125 for detecting the pressure inside 121 is provided. The output of the pressure sensor 125 is input to the control unit 140.

The battery container accommodating portion 130 includes a chamber 131.
And a holder 132 for holding the transfer container 160 and moving it up and down in the chamber 131, and a chuck 133 with a heater.

As shown in FIG. 5, is a side view showing the liquid injection nozzle 114 and the battery container 150 partially cut away. The battery container 150 includes a cylindrical container body 151, a liquid injection port 152 provided in the upper portion of the container body 151, and an electrode tab 153.

The transport container 160 is constructed so as to detachably hold the battery container 150, and the liquid injection nozzle 11
4 has a shape that suppresses the bulging of the battery container 150 in order to surely contact the liquid injection port 152 with the liquid injection port 152. Further, in consideration of preventing damage to the battery container 150 and preventing corrosion by the electrolytic solution E, it is formed of a resin such as a peak material.

Electrolyte solution injecting device 10 constructed in this way
For 0, the electrolytic solution E is injected into the battery container 150 as follows. First, in the electrolytic solution supply unit 110, the servo motor 112c is operated and the plunger 112b is operated in the direction of pulling out from the cylinder 112a.
The electrolyte E in 1 is sucked into the metering pump 112 by a predetermined amount. On the other hand, in the battery container housing portion 130, the chamber 1
In the state where 31 is lowered, the carrier container 160 for which the measuring process before liquid injection is completed by the carrier mechanism (not shown) is held by the holding table 132.
It is transported and fixed on.

Next, the liquid injection process is started. Holding table 13
In the state where 2 is lowered, the chamber 131 is raised and the liquid injection nozzle 114 is fitted into the liquid injection port 152 of the battery container 150 to form a closed container. Then, the liquid injection valve 113
Is switched to the gas pipe 121 side, the vacuum valve 122 is opened, and the inside of the battery container 150 is evacuated to 5 Torr.

Next, the liquid injection valve 113 is connected to the electrolytic solution line 11.
Switch to side 6. As a result, the electrolytic solution E is injected into one of the battery containers 150 due to the pressure difference between the inside of the electrolytic solution pipe 116 and the inside of the battery container 150. The electrolyte E, which cannot be completely filled due to the differential pressure, operates the metering pump 112 and pushes the plunger 112b by the servomotor 112c. Preset pressure (for example, 0.55 MPa / cm ² )
Is set as an upper limit and the servo motor 112c is controlled so as not to exceed this pressure, so that the pressure is gradually pushed into the battery container 150. When the value exceeds the set value, the servo motor 112c is stopped and the electrolytic solution E permeates into the battery container 150 and waits for the liquid pressure to drop. Then, the plunger 112b moves by a predetermined stroke, and after discharging a predetermined amount, the liquid injection valve 113 is closed and the operation of the servo motor 112c is stopped.

Next, the injection valve 113 is connected to the gas line 121.
Side, the vacuum valve 122 is closed, and the pressurization valve 123 is opened. As a result, the liquid injection valve 113
The electrolytic solution E remaining therein is put into the battery container 150.
As a result, a predetermined amount of the electrolytic solution E is added to one battery container 150.
Is poured. Similarly, the electrolytic solution is injected into the other battery container 150.

Next, the atmosphere opening valve 124 is opened to return the inside of the battery container 150 to the atmospheric pressure, the holding table 132 is lowered, and the chamber 131 is further lowered, thereby ending the process. Further, the chuck 1 heated by the heater
By sandwiching the electrode tab 153 with 33, the electrolytic solution E is evaporated and completely removed. As a result, it was possible to reduce defective sealing body welding to the electrode tab 153 to less than 0.1% in the next step of liquid injection.

It should be noted that the accumulated bubbles are expelled from the electrolyte conduit 116 by opening and closing the bubble removal valve 118 at regular intervals.

As described above, according to the electrolytic solution injecting apparatus 100 according to the second embodiment, the electrolytic solution line 116 and the measuring pump 112 due to the excessive pressure in the electrolytic line 116.
Preventing liquid leakage and measuring pump 11
2 can be controlled accurately, and the electrolytic solution E can be accurately controlled.
Can be injected into the battery container 150. Even in the case where the electrode tab 153 is protruded in the cylindrical battery container 150 and the electrolytic solution E remains in the liquid injection nozzle 113, the amount of the electrolytic solution measured by the metering pump 112 is maintained. All can be poured into the battery container 150.
Furthermore, since the bubbles in the electrolytic solution pipe line 116 can be expelled, it is possible to suppress the insufficiency of the injection amount and the variation in the injection amount. Furthermore, since the battery container 150 is prevented from being deformed by the injection of the electrolytic solution E by the transport container 160, the capacity of the battery container 150 does not change. From the above, the variation in the liquid injection volume is 3σ =
It was possible to improve the yield by setting the amount within 0.1 g.

On the other hand, since the pressure in the electrolytic solution pipe 116 is controlled, it is possible to perform the liquid injection at a relatively high pressure close to the upper limit value, so that the liquid injection process time can be shortened and the efficiency can be improved. Good injection can be performed.

Further, since the battery container 150 is held by the carrier container 160, it is not directly gripped by an air chuck or the like, and it is possible to effectively prevent the generation of dents and scratches. Therefore, it has become possible to produce a high-capacity aluminum can battery without lowering the production number, operating rate, and yield.

Furthermore, since the injection valve 113 adopts a three-way valve system capable of switching between the electrolytic solution path 116 and the gas path 121, it is not necessary to decompress the chamber 131, and the inside of the battery container 150 is kept at 5 torr or less. You can evacuate. For this reason, the permeation of the electrolytic solution into the wound coils, which are the positive and negative electrodes housed in the battery container 150, can be promoted. For example, when the injection amount was 6 g, it could be 180 seconds or less. Further, in a cylindrical battery, after injecting liquid, the electrode tab is sandwiched by a chuck 133 heated to 100 ° C. to 200 ° C. by a heater for about 2 seconds to surely dry the tab, and the sealing body welding defect is reduced to less than 0.1%. Could be reduced to.

The present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[0053]

According to the present invention, it is possible to efficiently inject a predetermined amount of electrolytic solution into the battery container and prevent damage to the battery container.

[Brief description of drawings]

FIG. 1 is a diagram schematically showing an electrolytic solution injecting device according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a carrier and a holder used in the electrolytic solution injecting apparatus.

FIG. 3 is a graph showing a pressure change in an electrolytic solution pipe in the electrolytic solution injecting device.

FIG. 4 is a diagram schematically showing an electrolytic solution injecting device according to a second embodiment of the present invention.

5A is a side view showing a part of a liquid injection nozzle 114 and a battery container 150 incorporated in an electrolyte solution injection device by cutting away, and FIG. 5B is a perspective view showing a chuck 133 and a battery container 150. FIG.

[Explanation of symbols]

10, 100 ... Electrolyte injection device, 20, 110 ... Electrolyte supply part, 22, 112 ... Metering pump, 22a, 112a
... Cylinder, 22b, 112b ... Plunger, 22c,
112c ... Servo motor, 23, 113 ... Liquid injection valve,
24, 114 ... Injection nozzle, 26, 116 ... Electrolyte conduit, 27, 117 ... Pressure sensor, 28, 118 ... Bubble removal valve, 30, 130 ... Battery container housing section, 40 ... Control section, 50, 150 ... Battery container, 52, 152 ... Injection port,
60, 160 ... Transport container, 120 ... Pressure adjusting unit.

Continued front page    (72) Inventor Tatsuya Nishi             33, Shinisogo-cho, Isogo-ku, Yokohama-shi, Kanagawa             Inside the Toshiba Production Technology Center (72) Inventor Kazuhiro Teraguchi             33, Shinisogo-cho, Isogo-ku, Yokohama-shi, Kanagawa             Inside the Toshiba Production Technology Center F term (reference) 5H023 BB05 BB10 CC01 CC22 CC24

Claims (5)

[Claims] 1. An electrolyte solution injecting device for injecting an electrolyte solution into a battery container, a metering pump for sucking a predetermined amount of electrolyte solution, and an injection solution liquid-tightly inserted into an injection port of the battery container. A nozzle, a decompression means for decompressing the inside of the battery container, an electrolytic solution conduit connecting the metering pump and the liquid injection nozzle, a valve provided in the electrolytic solution conduit, and an inside of the electrolytic solution conduit A pressure sensor for detecting the pressure of the electrolytic solution, wherein the metering pump is a cylinder containing the electrolytic solution,
The cylinder is provided with the plunger, the servomotor driving the plunger, and the control unit controlling the operation of the servomotor, the control unit controlling the operation of the servomotor. An electrolytic solution injecting device, which is set so that the pressure in the electrolytic solution line does not exceed a predetermined pressure. 2. The depressurizing means includes a gas line connected to a depressurizing pump, an atmosphere opening valve, and a pressurizing pump, and the valve has an outlet side connected to the liquid injection nozzle and an inlet side connected to the electrolytic solution pipe. The electrolyte solution injecting device according to claim 1, wherein the electrolyte solution injecting device is a three-way valve that switches between a passage and the gas pipe. 3. A method of injecting an electrolytic solution into a battery container, comprising: a step of accommodating a predetermined amount of electrolytic solution in a cylinder of a metering pump; a depressurizing step of depressurizing the inside of the battery container. A nozzle inserting step of inserting a liquid injection nozzle connected to the metering pump via an electrolyte solution line into a liquid injection port of the battery container in a liquid-tight manner, and pushing a plunger driven by a servomotor into the cylinder. A plunger drive step of sending the electrolyte solution stored in the solution injection nozzle to the injection nozzle, and a pressure detection step of detecting the pressure of the electrolyte solution in the electrolyte solution pipeline, the plunger drive step, the pressure is And a control step for controlling the pressure so as not to exceed a preset pressure. 4. An electrolytic solution pouring method for pouring an electrolytic solution into a battery container, the accommodating step of accommodating a predetermined amount of electrolytic solution in a cylinder of a metering pump, and the electrolytic pump conduit to the metering pump. Nozzle insertion step of inserting the liquid injection nozzle connected with the liquid injection into the liquid injection port of the battery container, and switching the inlet side of the liquid injection nozzle to the gas pipeline connected to the vacuum pump, The depressurizing step of depressurizing and switching the inlet side of the liquid injection nozzle to the electrolytic solution pipe line, and pushing the plunger driven by the servomotor into the cylinder sends the stored electrolytic solution to the liquid injection nozzle. A plunger driving step, a delivery step of switching the inlet side of the liquid injection nozzle to a gas pipeline connected to a pressurizing pump, and sending the electrolytic solution in the liquid injection nozzle into the battery container, And an opening step for returning the inside of the battery container to atmospheric pressure by switching the inlet side of the liquid nozzle to a gas pipeline connected to an atmosphere opening valve. 5. The electrolytic solution pouring solution according to claim 4, further comprising an electrolytic solution evaporation step of nipping the electrode of the battery container with a heated nipping tool to evaporate the electrolytic solution. Method.