JPH11339770A - Method and device for supplying battery electrolyte - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inject the prescribed amount of an electrolyte precisely and efficiently, and to simplify the constitution. SOLUTION: This device has a carrier 24 containing plural battery cans 14, and a decompression booth 60 having apertures 62 respectively containing the battery cans 14, and moving with respect to the carrier 24 through a cylinder 78. Further, an O-ring 66 set on an end surface 64 of the decompression booth 60 is provided to form a space 68 integrally communicating with the apertures 62 between the end surface 64 and an upper surface 24c of the carrier 24, and to keep a decompression chamber 58 composed of the apertures 62 and the space 68 airtight.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an electrolytic solution for a battery in which an electrolyte is injected into a battery can at normal pressure and then impregnated with the electrolyte under reduced pressure a plurality of times. The present invention relates to a liquid supply method and device.

[0002]

2. Description of the Related Art Generally, in a battery assembling process, an electrode plate group in which a positive electrode plate and a negative electrode plate are wound with a separator interposed therebetween is housed in a battery can, and an electrolytic solution is injected into the battery can. Work is taking place.

[0003] In this kind of injection work, it is necessary to make a gap in the battery can small in order to ensure the operability of the safety device, but from the viewpoint of battery performance, a large amount of electrolyte is precisely dispensed. Must be injected. Further, in the battery can, if the electrolytic solution remains above the groove formed by the beading, the electrolytic solution may be scattered in the device when the sealing body is inserted into the battery can. Therefore, it is necessary to sufficiently impregnate the electrolyte in the battery can.

Therefore, for example, Japanese Patent Application Laid-Open No. 8-250107
As disclosed in Japanese Patent Application Laid-Open Publication No. H10-209, there is known a method of injecting an electrolytic solution into a battery can at one time using a cup (hereinafter referred to as Conventional Technique 1). In the prior art 1, a cup is arranged in an opening provided at an upper part of a battery can, an electrolyte is supplied in advance into the cup, and the electrolyte is injected by centrifugal force, decompression, and pressurization. Alternatively, the inside of the battery can is preliminarily depressurized, and the electrolyte is injected from inside the cup under the action of switching the valve.

[0005] Further, a method of repeating a process of injecting an electrolyte and a process of impregnation has been conventionally performed (hereinafter referred to as prior art 2). In the prior art 2, after the electrolyte is injected to the upper edge portion of the battery can, the step of impregnating the electrolyte at normal pressure (under reduced pressure) is repeated a plurality of times to thereby inject the electrolyte into the battery can. Work.

[0006]

However, in the above-mentioned prior art 1, a large amount of electrolyte easily adheres to the lead (positive electrode lead) protruding from the battery can, and the sealing body is welded to the lead by laser welding or the like. It becomes a hindrance when doing. For this reason, it is necessary to provide a device for completely removing the electrolyte adhering to the lead after injecting the electrolyte, and it has been pointed out that the process becomes complicated and the equipment cost rises.

[0007] In addition, a salt, which is a solid content in the electrolytic solution, precipitates in the cup in which the electrolytic solution is temporarily stored.
A large variation occurs in the amount of liquid injected into the battery can. Further, if salt is deposited on the sealing portion of the cup, the sealing property is deteriorated. For this reason, a dedicated device for cleaning the cup is required, and there is a problem that the entire equipment becomes large.

On the other hand, in the above-mentioned prior art 2, when performing the impregnation treatment of the electrolytic solution under normal pressure, it takes a long time to impregnate the electrolytic solution, and the impregnating process is performed despite the existence of the space inside the battery can. In addition, there is no escape space for air, and there is a problem that the electrolyte is not impregnated in this space. In addition, in the impregnation of the electrolyte under reduced pressure, the level of the electrolyte injected into the battery can rises, and this electrolyte may spill from the upper edge of the battery can.

The present invention solves this kind of problem, and injects a predetermined amount of an electrolytic solution accurately,
An object of the present invention is to provide a method and an apparatus for supplying an electrolytic solution for a battery, which can prevent the electrolytic solution from adhering to an unnecessary portion and can simplify the configuration.

[0010]

According to the method and the apparatus for supplying an electrolytic solution of a battery according to the present invention, a battery can into which an electrolytic solution has been injected is placed in a decompression booth. After the first decompression process by pressure is performed, a decompression release process is performed. Next, after the battery can is subjected to a second decompression process using a second vacuum pressure higher than the first vacuum pressure, a decompression release process is performed.

As described above, by setting the second vacuum pressure higher than the first vacuum pressure, the electrolyte injected into the battery can is reliably prevented from spilling from the upper edge of the battery can. can do. Moreover, the impregnation time can be significantly reduced as compared with the impregnation treatment under normal pressure.

When the inside of the decompression booth reaches the first and second vacuum pressures during the first and second decompression treatments, the inside of the decompression booth is kept airtightly closed via a vacuum valve. Therefore, it is possible to reliably prevent the flow of air from being generated in the decompression booth at the time of depressurization, to effectively suppress the evaporation of the electrolytic solution, and to prevent variations in the injection amount.

Further, if the stop time of the pump for injecting the electrolytic solution into the battery can exceeds a certain time, the electrolytic solution in the pump nozzle evaporates and the next discharge amount tends to decrease. For example, the variation in the amount of electrolyte injected into the battery can is ± 5/1.
When the pump is stopped for one hour, the electrolyte in the pump nozzle portion is reduced to 1/100 cc while the pump is stopped for 1 hour.
It is known to decrease, and the variation in the injection amount becomes considerably large. Therefore, when the stop time of the pump exceeds a certain time, the pump discharges the electrolyte for one shot from the pump to the waste liquid portion, and then performs the operation of injecting the battery into the battery can. For this reason, it is possible to improve the electrolyte discharge accuracy of the pump.

Further, cooling is supplied to the inside of a carrier accommodating a plurality of battery cans integrally to cool the battery cans. Therefore, it is possible to prevent the electrolytic solution injected into the battery can from boiling at the time of impregnation under reduced pressure, and to effectively prevent the electrolytic solution from evaporating.

[0015]

FIG. 1 is a schematic plan view of an electrolytic solution supply device 10 according to an embodiment of the present invention, and FIG.
FIG. 2 is a partial schematic front view of the electrolytic solution supply device 10.

The battery 12 into which the electrolyte is dividedly injected by the electrolyte supply device 10 has a bottomed cylindrical battery can 14 as shown in FIG. And an electrode plate group 16 in which a negative electrode plate is wound with a separator interposed therebetween. The negative electrode lead 18 of the electrode plate group 16 is
The positive electrode lead 20 of the electrode group 16 projects upward from the battery can 14.

As shown in FIG. 1, an electrolytic solution supply device 10
Is installed in the battery manufacturing line 22 and the carrier 2
The electrolyte solution is placed in a total of 40 battery cans 14 arranged in a plurality (for example, 10) in the direction of arrow A and a plurality of rows (for example, 4 rows) in the direction of arrow B via 4. The first to fourth liquid injection stations 26a to 26x which can supply a fixed amount at a time.
26d, the first to fourth liquid injection stations 26a to 2
The first to fourth decompression stations 28a to 28d are provided downstream of the battery can 6 and alternately perform the decompression process and the decompression process on the battery can 14 a plurality of times.

As shown in FIG.
It has an accommodating portion 24a for arranging the battery cans 14 at predetermined intervals. The accommodation portion 24a has a substantially cylindrical shape, and has a chamber 24b formed inside the carrier 24.
In addition to the example, a supply pipe 29 communicating with a cooling air supply source (not shown) is connected to the chamber 24b. For example, 5 ° C. cold air is supplied from the supply pipe 29 into the chamber 24b.

As shown in FIG. 1, the electrolyte supply device 10 includes first and second injection stations 26a and 26b and first and second decompression stations 28a and 28b alternately oriented in the direction of arrow B1. First transport path 30 provided
And a second transport path 32 in which third and fourth liquid injection stations 26c and 26d and third and fourth pressure reduction stations 28c and 28d are arranged alternately in the direction of arrow B2.
And

At both ends of the first transfer path 30, a battery can pull-in station 34a and a carrier transfer station 35a are provided, and at both ends of the second transfer path 32, a carrier transfer station 35b and a battery can discharge station 34b are provided. Is provided. Carrier transfer station 3
5a and 35b, and the battery can pull-in station 34a and the battery can discharge station 34b are connected via first and second connection paths 36a and 36b, respectively, to form a carrier circulation transport path.

First to fourth injection stations 26a to 26
d is a first to fourth liquid injection means 38a capable of supplying a predetermined amount (the first to fourth times) of the electrolyte solution to the battery cans 14 arranged in four rows of ten pieces (a total of 40 pieces). To 38d.

As shown in FIG. 2, the first liquid injection means 38a
Are self-propelled movable bodies 42a, 4a which can move back and forth in the direction of arrow B along rails 40a, 40b arranged in parallel with each other above both ends in the longitudinal direction (direction of arrow A) of the carrier 24.
2b. The moving bodies 42a and 42b support both ends of an arm 44 via lifting means (not shown). The arm 44 has a metering pump corresponding to the ten battery cans 14 mounted on the carrier 24. 46a-46
j is attached. The metering pumps 46a to 46j communicate with a liquid tank 48 in which the electrolyte is stored. Each of the metering pumps 46a to 46j has a liquid injection tube 50a to
50j are arranged.

As shown in FIG. 3, the first liquid injection means 38a has an emptying station 52 for discharging the electrolyte for one shot when the stoppage time of the metering pumps 46a to 46j exceeds a predetermined time. Is provided. The empty beating station 52 is provided with a waste liquid tray 54 disposed outside a position where the electrolyte is injected into the battery can 14 by the first injection means 38a.
And a waste liquid pipe 56 connected to the waste liquid tray 54.
Are connected to a waste liquid tank and the like (not shown).

As shown in FIG. 4, the first decompression station 28a disposed downstream of the first injection station 26a covers the entirety of the carriers 24 arranged in four rows, or A decompression chamber 58 for each carrier 24
Is provided with a pressure-reducing booth 60 that can be moved up and down freely.

The decompression booth 60 has an opening 62 for receiving each battery can 14 one by one corresponding to a predetermined number of battery cans 14.
Each opening 62 is provided at the end face 6 of the decompression booth 60.
4 to a predetermined depth H and a diameter D
Has a columnar shape with an open section. The depth H is
While the depth is set to the minimum necessary to avoid the positive electrode lead 20 protruding from the upper side of each battery can 14, the diameter D is
The diameter of the battery can 14 is set slightly larger than the diameter of the battery can 14.

An O-ring (seal material) 66 is mounted on the end face 64 of the decompression booth 60 so as to surround all the openings 62. The O-ring 66 is in close contact with the upper surface 24c of the carrier 24, and forms a space 68 that is integrally communicated with each opening 62 between the end surface 64 of the decompression booth 60 and the upper surface 24c. The opening 62 and the space 68 form a decompression chamber 58, and the decompression chamber 58 is kept airtight by an O-ring 66.

A passage 70 communicating with the space 68 is formed in the decompression booth 60. A pressure gauge 74 is provided in the middle of a pipe 72 which communicates the passage 70 with a negative pressure source (not shown).
And a vacuum valve 76. The vacuum valve 76 is switched between a position where the passage 70 communicates with a negative pressure source (not shown), a position where the passage 70 is opened to the atmosphere, and a position where the passage 70 is closed.

A support plate 82 is fixed to an actuator for raising and lowering the decompression booth 60, for example, a rod 80 extending downward from a cylinder 78, and holes 84 are formed at four corners of the support plate 82. A column 86 is fixed to the upper part of the decompression booth 60, and the column 86 is set to have a smaller diameter than the hole 84, and a centering tapered surface 88 is formed on the upper part of each column 86 so as to expand upward. Is done. A spring 90 is externally inserted into the support column 86, and both ends of the spring 90 are pressed against the decompression booth 60 and the support plate 82.

Second to fourth injection stations 26b to 26
d and the second to fourth decompression stations 28b to 28d
Has the same configuration as the above-described first injection station 26a and first decompression station 28a, and the same components are denoted by the same reference numerals and detailed description thereof will be omitted.

The operation of the electrolytic solution supply apparatus 10 according to this embodiment having the above-described configuration will be described below in relation to the electrolytic solution supply method according to the present invention.

As shown in FIG. 1, the battery cans 14 are transported along the battery manufacturing line 22 in the direction of arrow A1.
The carrier 24 is inserted and supported by the accommodating portion 24a of the carrier 24 arranged at the position a. In the battery can pull-in station 34a, after ten battery cans 14 are arranged in each carrier 24, the four rows of carriers 24 are moved to the first injection station 26.
a.

At the first injection station 26a, first,
The first liquid injection means 38a is arranged corresponding to the first row of carriers 24, and the arm 44 moves in the direction of arrow C1 (vertically downward direction) in FIG. And each metering pump 46
The injection pipes 50a to 50j provided in the a to 46j are:
After being placed above the battery cans 14 supported by the first row of carriers 24, the metering pumps 46a to 46j are driven. For this reason, the metering pumps 46a to 46j
A predetermined amount (the first time) of the electrolytic solution stored in the liquid tank 48 is supplied to the battery can 1 via each of the injection pipes 50a to 50j.
Inject into 4.

Next, the arm 44 is raised (in the direction of arrow C2), and the movable bodies 42a and 42b are
0a and 40b along arrow B1 (or arrow B2).
Direction), and the first liquid injection means 38a
It is arranged correspondingly above the carriers 24 in the row. In this state, the first liquid injection means 38a is driven in the same manner as the battery cans 14 inserted into the first row of carriers 24, and the first cans are inserted into the respective battery cans 14 inserted into the second row of carriers 24. Batch electrolyte is injected. Similarly, the first supply process of the electrolytic solution to each battery can 14 inserted and supported by the third and fourth rows of carriers 24 arranged in the first liquid injection station 26a is performed.

At the first filling station 26a, the battery can 14
After the first electrolytic solution is injected, the carriers 24 in the fourth row are integrally sent to the first decompression station 28a to be decompressed. That is, at the first pressure reducing station 28a, as shown in FIG.
Then, the pressure reducing booth 60 centered and supported by the support plate 82 via the tapered surface 88 is lowered. Therefore, the O-ring 66 mounted on the end surface 64 of the decompression booth 60 is in close contact with the upper surface 24c of the carrier 24, and the battery can 14 housed in the carrier 24 is integrally disposed in the decompression chamber 58. .

In this state, the passage 70 of the decompression booth 60 communicates with a negative pressure source (not shown) via the vacuum valve 76, and under the action of the negative pressure source, the inside of the decompression chamber 58 is connected via the passage 70. Is decompressed. Here, as shown in FIG. 6, when the inside of the decompression chamber 58 reaches a decompression degree (first vacuum pressure) of −200 mmHg, the vacuum valve 76 is closed and the decompression chamber 58 is airtightly closed and held. . Then, after the inside of the decompression chamber 58 is left under a decompression state of -200 mmHg for about 10 seconds or more, the vacuum valve 76 is switched to open the passage 70 to the atmosphere (decompression release processing).

Next, the vacuum valve 76 is driven to operate the pressure reducing chamber 58.
Communicates with a negative pressure source (not shown), and when the inside of the pressure reducing chamber 58 reaches a reduced pressure degree (second vacuum pressure) of -700 mmHg under the operation of the negative pressure source, the vacuum valve 76 is closed. . Therefore, the inside of the decompression chamber 58 is −700 mmHg.
Is maintained, and after a predetermined time elapses, the vacuum valve 76 is opened to the atmosphere.

As described above, the first decompression station 28a
Then, the inside of the decompression chamber 58 in which the battery can 14 is disposed is first reduced to the first vacuum pressure of -200 mmHg to be impregnated with the electrolytic solution, and the decompression chamber 58 is opened to the atmosphere. Then, a pressure release process is performed to prevent the electrolyte solution from spilling from the battery can 14.
Next, the inside of the decompression chamber 58 is at the second vacuum pressure of −70.
After maintaining the pressure reduction degree at 0 mmHg, the pressure reduction chamber 58 is opened to the atmosphere.

Therefore, the effect is obtained that the electrolytic solution injected into the battery can 14 does not spill from the battery can 14 and that the electrolytic solution can be surely impregnated in a short time. In particular, the electrolyte in the battery can 14 becomes foamy, and the foamed electrolyte swells along the positive electrode lead 20 so that no foam is formed. Can be reliably prevented from being performed. This eliminates the need to remove the salt attached to the positive electrode lead 20 after the liquid injection process,
The effect is obtained that the efficiency of the entire injection operation is easily performed.

During impregnation at -200 mmHg under reduced pressure, the upper space in the battery can 14 is impregnated with the electrolytic solution, while during impregnation at -700 mmHg, the electrode group as the lower space in the battery can 14 is impregnated. 16 is impregnated with the electrolytic solution.

In the present embodiment, the supply pipe 29 is connected to the carrier 24 containing the battery can 14, and the chamber 2 of the carrier 24 is connected through the supply pipe 29.
For example, cold air of 5 ° C. is introduced into 4b. Thereby, each battery can 14 arranged in the accommodating portion 24a is subjected to the cooling action by the cool air, and prevents the temperature of the electrolyte injected into the battery can 14 from rising. . Therefore, the boiling of the electrolyte can be reliably prevented, and the evaporation of the electrolyte can be prevented as much as possible.

Further, in the present embodiment, the opening 62 having the minimum capacity capable of accommodating each battery can 14 is provided in the decompression booth 60.
A plurality of O-rings 66 mounted on the decompression booth 60 are brought into close contact with the upper surface 24 c of the carrier 24, and the decompression chamber 5 including the opening 62 and the space 68 is formed.
8 is hermetically closed.

Therefore, when the inside of the decompression chamber 58 reaches the first vacuum pressure of -200 mmHg, the interior of the decompression chamber 58 is kept closed by closing the vacuum valve 76. The flow of air can be cut off, and the evaporation of the electrolytic solution is effectively prevented, so that the injection amount does not vary. At this time, since the inside of the decompression chamber 58 is sucked from the passage 70 communicating with the space portion 68, no air flow occurs on the upper side of each battery can 14, and for example, the liquid level of the electrolyte solution fluctuates. Can be effectively suppressed.

Further, the decompression booth 60 is floatingly supported by the support plate 82 via the support column 86 and the spring 90. Therefore, the upper surface 2 of the carrier 24
Even if the 4c is inclined, the O-ring 66 attached to the decompression booth 60 can be securely brought into close contact with the upper surface 24c, and the inside of the decompression chamber 58 can be airtightly closed. When the rod 80 moves upward through the cylinder 78, the tapered surfaces 88 of the columns 86 are supported on the wall surfaces of the holes 84 of the support plate 82, and the decompression booth 60 is easily and automatically centered. Will be.

The battery can 14 which has been subjected to the predetermined impregnation at the first pressure reducing station 28a is transferred to the second liquid filling station 26b integrally with the carrier 24. In the second injection station 26b, the first injection station 26
As in a, a second operation of injecting the electrolyte into each of the battery cans 14 of the carriers 24 arranged in four rows is performed.
The battery can 14 into which the second injection of the electrolytic solution has been performed at the second injection station 26b is placed in the second pressure reducing station 28b.
Transported to

In the second decompression station 28b, as shown in FIG. 7, the decompression process and the decompression release process are performed three times, respectively, so that the second impregnation process of the electrolytic solution is performed. Specifically, after the decompression booth 60 is lowered and the O-ring 66 is in close contact with the upper surface 24c of the carrier 24 to form the decompression chamber 58, first, at a decompression degree of -200 mmHg (first vacuum pressure). The apparatus is left for a predetermined time, released to the atmosphere, and subjected to a decompression releasing process.

Next, the decompression chamber 58 is depressurized to a state of a depressurization degree of -400 mmHg (second vacuum pressure) and left for a predetermined time to open to the atmosphere. Further, after the pressure is reduced to a decompression degree (third vacuum pressure) of -700 mmHg and maintained for a predetermined time, a decompression release process is performed.

As described above, the second decompression station 28b
In this example, the decompression process and the decompression release process are performed alternately, and the first vacuum pressure, the second vacuum pressure, the third vacuum pressure, and the degree of decompression are set so as to increase sequentially. This allows the battery can 14 to be impregnated at -200 mmHg under reduced pressure.
The lower gap of the battery can 14 is impregnated at the time of the impregnation at -400 mmHg and -700 mmHg while the upper gap of the first pressure station 28 is impregnated.
The same effect as a can be obtained.

Next, the carrier 24 is transported to the carrier transport station 35a, and is transported along the first connecting path 36a in the direction of arrow A1 in FIG. 1 to the carrier transport station 35b. Battery can 1 for carrier 24
4 is transported from the carrier transfer station 35b to the third liquid injection station 26c and the third decompression station 28c, where the electrolyte is injected and impregnated for the third time. The battery can 14 is further connected to the fourth injection station 2
6d and the fourth decompression station 28d are conveyed to perform the fourth injection and impregnation of the electrolytic solution, and then transferred to the battery can discharge station 34b. Third and fourth
In the decompression stations 28c and 28d, similarly to the second decompression station 28b, the electrolyte impregnation process is performed according to the procedure shown in FIG.

In the battery can dispensing station 34b,
The battery cans 14 inserted and supported by each carrier 24 are sequentially sent out to the battery manufacturing line 22. Battery can 14
Is transported in the direction of arrow A1 and sent to the next step such as a sealing process.

In the first to fourth injection stations 26a to 26d, a fixed amount of the electrolyte is discharged into the battery can 14 via the fixed amount pumps 46a to 46j.
If the metering pumps 46a to 46j stop for a certain period of time or more, the electrolyte in each pump nozzle will evaporate.

Therefore, in the present embodiment, the metering pump 46
When the stop time of a to 46j exceeds a certain time, the metering pumps 46a to 46j are temporarily transferred to the idle driving station 52 as shown in FIG. In this idle driving station 52, after one shot of the electrolytic solution is discharged from the metering pumps 46a to 46j to the waste liquid tray 54, the metering pumps 46a to 46j move to the pouring position and the battery can 1
The operation of injecting the electrolytic solution into 4 is performed.

As described above, when the metering pumps 46a to 46j are stopped for a predetermined time or more, for example, for 5 minutes or more, the pumps are transferred to the idling station 52 and idling is performed. For this reason, a predetermined amount of the electrolytic solution is constantly injected into the battery can 14 with high accuracy, and the effect of effectively preventing variations in the injected amount can be obtained.

Incidentally, when the liquid injection was actually performed using this embodiment, the fluctuation of the liquid injection amount was found to be 2 seconds tact and the gap in the battery can 14 was 0.8 to 1.0 cc. It was within the range of ± 0.05 cc, and a good injection treatment was achieved, in which no electrolyte solution was scattered and the positive electrode lead 20 was not stained.

[0054]

As described above, in the battery electrolyte supply method and apparatus according to the present invention, after the electrolyte is injected into the battery can, first, the first vacuum pressure is applied to the battery can. A decompression process and a decompression release process are performed. Next, the battery can is subjected to a second decompression process and a decompression release process using a second vacuum pressure higher than the first vacuum pressure. For this reason, the electrolyte level does not rise more than necessary and spillage does not occur, and the impregnation process of the electrolyte solution is efficiently performed in a short time. Further, the electrolytic solution does not adhere to the electrode plate or the like, and the efficiency of the entire electrolytic solution supply operation can be easily improved.

[Brief description of the drawings]

FIG. 1 is a schematic plan explanatory view of an electrolytic solution supply device according to an embodiment of the present invention.

FIG. 2 is a partial schematic front view of an injection station constituting the electrolytic solution supply device.

FIG. 3 is a partial schematic side view of the liquid injection station.

FIG. 4 is an explanatory front view of a decompression booth constituting the electrolytic solution supply device.

FIG. 5 is a partial cross-sectional perspective view of a battery can and a carrier into which an electrolytic solution is injected by the electrolytic solution supply device.

FIG. 6 is an explanatory diagram of decompression and decompression release processing of a first decompression station.

FIG. 7 is an explanatory diagram of decompression and decompression release processing in second to fourth decompression stations.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Electrolyte supply apparatus 12 ... Battery 14 ... Battery can 16 ... Electrode group 18 ... Negative electrode lead 20 ... Positive electrode lead 22 ... Battery manufacturing line 24 ... Carrier 24a ... Housing part 24b ... Room 26a-26d ... Injection station 28a- 28d
… Decompression station 29… Supply line 38a-38d
... Injection means 46a-46j ... Measuring pump 52 ... Punching station 54 ... Waste liquid tray 58 ... Decompression chamber 60 ... Decompression booth 62 ... Opening 64 ... End face 66 ... O-ring 68 ... Space 70 ... Pathway 72 ... Piping 76 ... Vacuum valve 78 ... Cylinder 82 ... Support plate 86 ... Post 88 ... Tapered surface 90 ... Spring

Claims (8)

[Claims] 1. A method for supplying an electrolytic solution for a battery, comprising: repeating a process of injecting the electrolytic solution under a reduced pressure after injecting the electrolytic solution into a battery can under normal pressure and injecting the electrolytic solution a plurality of times. Disposing the battery can into which the electrolytic solution has been injected in a decompression booth, performing a first decompression process using a first vacuum pressure on the battery can, and then performing a decompression release process; Performing a second decompression process using a second vacuum pressure higher than the first vacuum pressure, and then performing a decompression release process. 2. The method according to claim 1, wherein
In the first and second decompression processes, when the inside of the decompression booth reaches the first and second vacuum pressures, the inside of the decompression booth is airtightly closed and held via a vacuum valve. Electrolyte supply method. 3. The method according to claim 1, wherein
A step of discharging the electrolyte for one shot from the pump to a waste liquid portion when a stop time of a pump for injecting the electrolyte into the battery can exceeds a predetermined time. Liquid supply method. 4. The method according to claim 1, wherein
A method for supplying an electrolytic solution for a battery, comprising supplying cooling air to a carrier accommodating a plurality of said battery cans to cool said battery cans. 5. An electrolytic solution supply device for a battery, wherein a process of injecting an electrolytic solution into a battery can at normal pressure and then impregnating the electrolytic solution under reduced pressure is repeated a plurality of times to inject the electrolytic solution. A carrier integrally housing a plurality of the battery cans, a decompression booth having a plurality of openings in which the battery cans are received one by one, and capable of moving back and forth with respect to the carrier via an actuator; A space that is mounted on an end face of the decompression booth and that integrally communicates with the plurality of openings between the end face and the upper surface of the carrier is formed. And a sealing member for keeping the decompression chamber airtight. 6. The electrolytic solution supply device according to claim 5, wherein
On the way to communicate the decompression booth and the negative pressure source,
A battery electrolyte supply device for a battery, comprising a vacuum valve for airtightly closing and holding the inside of the decompression booth. 7. The electrolytic solution supply device according to claim 5, wherein
A battery electrolyte supply device for a battery, wherein a cooling air supply pipe for supplying cooling air to the inside of the carrier to cool the battery can is connected to the carrier. 8. The electrolytic solution supply device according to claim 5, wherein
The liquid injection means for injecting the electrolytic solution into the battery can includes a waste liquid portion for discharging the electrolytic solution by one shot when a stop time of a pump exceeds a predetermined time. Liquid supply device.