JP2002124221A - Electrolyte penetration preventing structure and battery device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently suppress the penetration of an electrolyte leaking from a battery into an electric circuit part, and to prevent the generation of a hazardous material caused by the electrolyte leaking from the battery. SOLUTION: Batteries 2a-2d and the electric circuit part 3 are separated with two cutoff walls 11, 12, connecting electrodes 13a-13h electrically connecting the batteries 2a-2d and the electric circuit part 3 are passed through slits 11a-11c, 12a, 12b, and the connecting electrode 13a-13h installed between the cutoff wall 11 and the cutoff wall 12 are sealed with filling resin 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for preventing an electrolyte from leaking from a battery into an electric circuit and a battery device having the function.

[0002]

2. Description of the Related Art Generally, a battery device is provided with a battery as a power generation source and power generated from the battery.
And an electric circuit section including a control circuit for controlling the output. The battery and the electric circuit are often arranged close to each other because of the size restriction of the entire battery device. In this case, measures are taken to prevent the electrolyte leaked from the battery from entering the electric circuit. Need to be taken. this is,
This is to prevent the leaked electrolyte from penetrating into the electric circuit portion and short-circuiting or damaging the electric circuit. As a specific measure, a single wall is provided between the battery and the electric circuit portion. And a method of covering the battery or the electric circuit portion with a material such as absorbent paper that absorbs the electrolytic solution.

[0003]

However, in the method in which the battery and the electric circuit are cut off by a single wall and the gap is closed by a resin such as a bond, the resin is dissolved by the electrolyte leaked from the battery. However, there is a problem that the leaked electrolyte may enter the electric circuit portion.

Further, since the battery and the electric circuit must be electrically connected to each other by a connection electrode, even if the battery and the electric circuit are cut off by a wall, the connection between the connection electrode and the wall is not possible. In addition, there is a problem that a gap is generated, and the electrolyte penetrates into the electric circuit part due to a capillary phenomenon through the gap.

Further, when the leaked electrolyte cannot be sufficiently shut off from the outside, there is another problem that the electrolyte is decomposed by external moisture and harmful substances are generated.
In addition, in the method of covering the battery or the electric circuit portion with a material such as absorbent paper that absorbs the electrolyte, depending on the amount of the leaked electrolyte, the absorption paper alone cannot perform sufficient absorption, and the amount of the absorbed electrolyte may not be sufficient. There is a problem in that the unremoved electrolyte oozes on the surface of the absorbent paper or the like, and the electrolyte oozing on the surface may come into contact with the electric circuit portion.

The present invention has been made in view of the above points, and provides an electrolyte infiltration preventing structure capable of sufficiently suppressing the infiltration of an electrolyte leaking from a battery into an electric circuit portion. The purpose is to:

It is another object of the present invention to provide an electrolyte intrusion prevention structure capable of preventing generation of harmful substances due to electrolyte leaked from a battery.

Still another object of the present invention is to provide a battery device capable of sufficiently preventing the electrolyte leaked from a battery from entering an electric circuit portion. Another object of the present invention is to provide a battery device capable of preventing harmful substances from being generated by an electrolyte leaking from a battery.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to an electrolyte penetration preventing structure for preventing an electrolyte leaking from a battery from entering an electric circuit portion.
A first blocking wall disposed on the battery side in a portion between the battery and the electric circuit portion, and a plate shape having a second slit formed therein. And a second blocking wall disposed on the electric circuit side in a portion between the battery and the electric circuit unit, one end of which is electrically connected to an output unit of the battery, and wherein the first slit and the A connection electrode that penetrates a second slit and has the other end electrically connected to the electric circuit unit, and is filled between the first blocking wall and the second blocking wall; There is provided an electrolyte intrusion prevention structure, comprising: a filling resin that seals the connection electrode disposed between a blocking wall and the second blocking wall.

Here, the first and second blocking walls prevent the electrolyte leaking from the battery from entering the electric circuit portion, confine the filling resin in a certain area, and connect the connection electrodes. , Electrically connect the battery to the electrical circuit,
The filling resin dissolves the electrolyte leaked from the battery, prevents the electrolyte from invading the electric circuit portion, and fills a gap between the filling resin and the connection electrode by expansion when the electrolyte melts, It suppresses infiltration of the electrolytic solution into the electric circuit part due to the capillary phenomenon.

Further, in the battery device having a function of preventing the electrolyte leaked from the battery from entering the electric circuit portion, the battery device has a plate shape having a first slit formed therein, and the battery and the electric circuit portion are connected to each other. A first blocking wall disposed on the battery side in an intervening portion, and a plate shape in which a second slit is formed, and disposed on the electric circuit side in a portion between the battery and the electric circuit portion. A second barrier,
One end is electrically connected to the output of the battery,
A connection electrode penetrating through the slit and the second slit, the other end of which is electrically connected to the electric circuit portion, and is filled between the first blocking wall and the second blocking wall, A battery device is provided, comprising: a filling resin disposed between the first blocking wall and the second blocking wall to seal the connection electrode.

Here, the first and second blocking walls prevent the electrolyte leaked from the battery from entering the electric circuit portion, confine the filling resin in a certain area, and connect the connection electrodes. , Electrically connect the battery to the electrical circuit,
The filling resin dissolves the electrolyte leaked from the battery, prevents the electrolyte from invading the electric circuit portion, and fills a gap between the filling resin and the connection electrode by expansion when the electrolyte melts, It suppresses infiltration of the electrolytic solution into the electric circuit part due to the capillary phenomenon.

Further, in the battery device having a function of preventing the electrolyte leaked from the battery from entering the electric circuit portion, the battery device has a plate shape in which a slit is formed, and has a portion between the battery and the electric circuit portion. And a connection electrode, one end of which is electrically connected to the output portion of the battery, penetrates the slit, and the other end of which is electrically connected to the electric circuit portion. And a neutralizing agent that is filled in a contact state, seals at least a part of the connection electrode disposed on the battery side, and neutralizes the electrolyte leaked from the battery. A battery device is provided.

Here, the blocking wall prevents the electrolyte leaked from the battery from entering the electric circuit portion, and the connection electrode is
The battery is electrically connected to the electrical circuit, and the neutralizing agent neutralizes the electrolyte leaked from the battery, dissolves the electrolyte leaked from the battery, and the electrolyte infiltrates the electrical circuit. Further, the gap between the filling resin and the connection electrode is filled by expansion when the electrolytic solution is dissolved, and the infiltration of the electrolytic solution into the electric circuit portion due to the capillary phenomenon is suppressed.

Further, in a battery device having a function of preventing an electrolyte solution leaked from a battery from entering an electric circuit portion, an electric circuit board on which an electric circuit is formed, and a film form covering one side of the electric circuit board are provided. And a filling resin filled between the film sheet and the battery while being in contact with the film sheet.

Here, the film sheet suppresses the electrolyte leaked from the battery from entering the electric circuit portion, and the filling resin dissolves the electrolyte leaked from the battery, and the electrolyte solution flows into the electric circuit portion. While preventing invasion,
The expansion when the electrolytic solution is dissolved fills the gap between the filling resin and the connection electrode, and suppresses the penetration of the electrolytic solution into the electric circuit portion due to the capillary phenomenon.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. First, a first embodiment of the present invention will be described.

FIG. 1 shows a battery device 1 according to the present embodiment.
FIG. 2 is an enlarged plan view of a portion A in FIG. 1. In addition, for convenience of description, in FIGS. 1 and 2, the illustration of a cover or the like put on the upper surface is omitted.

The battery device 1 includes, for example, a case 4 that mainly covers the bottom and side surfaces thereof, and a battery 2 that is a power generation source.
a to 2d, electric power generated from the batteries 2a to 2d is transmitted, and an electric circuit unit 3 including a control circuit for controlling the output thereof;
And the electric circuit portion 3 of the electrolyte leaked from the batteries 2a to 2d
It is constituted by an electrolytic solution intrusion prevention structure 10 for preventing intrusion into the fluid.

The electrolyte intrusion prevention structure 10 has, for example, a plate shape in which slits 11a to 11c, which are first slits, are formed, and includes the batteries 2a to 2d and the electric circuit unit 3.
The first portion disposed on the side of the batteries 2a to 2d in the portion between
The battery 2 has a plate shape in which a blocking wall 11 which is a blocking wall of the above, and slits 12a to 12b which are second slits are formed.
a blocking wall 12 serving as a second blocking wall disposed in the electric circuit unit 3 in a portion between the electric circuit unit 3 and the electric circuit unit 3, one end of which is electrically connected to the output units 2aa to 2da of the batteries 2a to 2d. , A connection electrode 13a that penetrates the first slit and the second slit and has the other end electrically connected to the electric circuit unit 3
To 13 h and a filling resin 14 filled between the blocking wall 11 and the blocking wall 12 to seal the connection electrodes 13 a to 13 h disposed between the blocking wall 11 and the blocking wall 12.

The case 4 is made of, for example, an insulator, and has a box shape in which the upper surface is removed from a substantially rectangular parallelepiped hollow. The batteries 2a to 2d are, for example, primary batteries such as alkaline batteries or secondary batteries such as lithium ion batteries, and each of the batteries 2a to 2d has an output unit 2aa to 2da for outputting generated power. are doing. The electric circuit unit 3 is configured, for example, by mounting an active component such as a semiconductor and a passive component such as a capacitor on a mounting board on which a wiring pattern is formed. Blocking walls 11, 12
Has, for example, a plate shape integrally formed with the case 4 and a plurality of slits 11a to 11c, 12a, and 12b into which the connection electrodes 13a to 13h are inserted. In FIG. 2, the slits 11a to 11a are used as the first slits.
11c is the second slit as the second slit,
Although only 12b is shown, in practice, each connection electrode 1
The number of slits corresponding to 3a to 13h will be formed. The connection electrodes 13a to 13h are, for example, plate-shaped conductors, are made of a material having high conductivity, and hardly corroded by adhesion of moisture, an electrolytic solution, or the like, or are formed by performing such processing. Is done.

The filling resin 14 is desirably a waterproof resin, and is made of a thermoplastic resin such as a polyamide resin or a polyolefin resin, or a hydrated resin such as a silicon resin (silicon bond / silyl group-containing polymer). be able to. Further, it is also possible to use a resin mainly composed of an acrylic resin as the filling resin 14. The resin mainly composed of an acrylic resin does not harden in a few minutes after contact with the atmosphere, such as a silicon resin. Therefore, when the resin containing the acrylic resin as a main component is used as the filling resin 14, the curing time of the filling resin 14 does not limit the filling work time of the filling resin 14. Can be made more efficient. Further, since the resin containing the acrylic resin as a main component is not cured by exposure to the atmosphere, when the resin containing the acrylic resin as a main component is used as the filling resin 14,
There is no need to provide a mechanism to keep this resin from contacting the atmosphere before filling. Therefore, the filling device can be simplified. When a resin containing an acrylic resin as a main component is used as the filling resin 14, examples of the filling method include filling in a foamed state, filling in a nonwoven fabric state, filling in a granular state, filling in a powder state, and the like. Can be exemplified. By filling the filling resin 14 in this manner, the surface area of the filling resin 14 increases, the amount of the electrolytic solution that can be absorbed can be increased, and the reaction efficiency with the electrolytic solution can be improved. Furthermore, a neutralizing agent that neutralizes the electrolyte leaked from the battery can be used as the filling resin 14. This neutralizing agent varies depending on the type of electrolyte used in the battery. For example, when an alkaline electrolyte is used as in an alkaline primary battery and the electrolyte leaking from the battery becomes alkaline, the neutralizing agent may be, for example, a halide such as chloride, bromide or iodide. Used. On the other hand, lithium hexafluorophosphate, which is an electrolytic solution used in lithium ion secondary batteries, is hydrolyzed by surrounding moisture after leaking from the battery, and hydrogen fluoride, phosphoric acid, oxyfluorophosphoric acid, etc. To oxides. When the electrolyte leaked from the battery becomes acidic, the neutralizing agent includes
For example, an alkaline substance such as acetylene black or a substance having a hydroxyl group is used. In order to efficiently absorb the electrolyte leaked from the batteries 2a to 2d, the filling resin 14 is preferably a resin having a large intermolecular force.

The blocking walls 11 and 12 are formed, for example, inside the bottom surface of the case 4 and perpendicular to the bottom surface of the case 4 to divide the internal space of the case 4. At this time, the shielding walls 11 and 12 are provided in parallel with each other, so that the space inside the case 4 is divided into a space surrounded by the shielding wall 11 and the side and bottom surfaces of the case 4, and the shielding wall 11 and the shielding wall 12. The space is divided into three: a space surrounded by the bottom surface of the case 4, and a space surrounded by the blocking wall 12 and the side surface and the bottom surface of the case 4.

The batteries 2a to 2d are housed in, for example, a space surrounded by the blocking wall 11, the side surface and the bottom surface of the case 4, and the output portions 2aa to 2da of the batteries 2a to 2d have connection electrodes 13a to 13h. Are electrically connected. Each battery 2
The connection electrodes 13a to 13h electrically connected to the output units 2aa to 2da of the a to 2d are, for example, slits 11a to 13d.
11c and the like, and penetrates the blocking wall 11 via a space surrounded by the blocking wall 11, the blocking wall 12, and the bottom surface of the case 4,
Further, each battery 2 penetrates through slits 12a, 12b and the like.
One end (hereinafter, the other end) different from the side electrically connected to the output units 2aa to 2da of the a to 2d is arranged in a space surrounded by the blocking wall 12, the side surface and the bottom surface of the case 4.

For example, the electric circuit section 3 is accommodated in a space surrounded by the blocking wall 12 and the side and bottom surfaces of the case 4, and is disposed in a space surrounded by the blocking wall 12 and the side surface and bottom surface of the case 4. The other ends of the connection electrodes 13a to 13h are electrically connected to the electric circuit unit 3.

For example, a space surrounded by the blocking wall 11, the blocking wall 12, and the bottom surface of the case 4 is filled with a filling resin 14, and the filling resin 14 fills the space.
Are sealed between the connection electrodes 13a to 13h.

FIG. 3 is a sectional view taken along the line BB in FIG. In FIG. 3, the lid 1 not shown in FIG.
6 is illustrated. As described above, the filling resin 14 is filled in the resin filling portion 15 which is a space surrounded by the blocking wall 11, the blocking wall 12, and the bottom surface of the case 4, and is disposed between the blocking wall 11 and the blocking wall 12. Sealed connection electrodes 13a to 13h. At this time, the upper surface of the resin filling portion 15 is closed by a lid 16 as shown in FIG. 3B, whereby the filling resin 14 filled in the resin filling portion 15 is cut off by the blocking walls 11 and 12. The case 4 is confined in a substantially closed space surrounded by the bottom surface and the lid 16.

FIG. 4 is a modified example of FIG. 3, and shows a sectional view taken along the line BB in FIG. 2, as in FIG. Note that FIG. 4 illustrates the top cover 17 and the lid 18 not shown in FIG.

In the case of FIG. 4, first, as exemplified in FIG. 4A, an upper portion of the resin filling portion 15 which is a space surrounded by the blocking wall 11, the blocking wall 12, and the bottom of the case 4, The top cover 17 having the resin filling hole 17a is attached. Thereafter, a resin filling hole 17 is formed in a space surrounded by the blocking wall 11, the blocking wall 12, the bottom surface of the case 4, and the top cover 17.
The filling resin 14 is filled from a, and after the filling is completed, the resin filling hole 17 a is closed with the lid 18. Thereby, the filled resin 14 is confined in a substantially closed space surrounded by the blocking wall 11, the blocking wall 12, the bottom surface of the case 4, the top cover 17, and the lid 18.

Next, referring to FIGS. 1 to 4, the batteries 2a to 2d
A phenomenon inside the battery device 1 when the electrolyte leaks from the battery will be described. The electrolyte leaked from the batteries 2a to 2d is first transmitted to the bottom surface of the case 4, and further from there to the connection electrodes 13a to 13h, and reaches the slits 11a to 11c of the blocking wall 11. Slit 1 of blocking wall 11
The electrolytic solution that has reached 1a to 11c enters the closed space surrounded by the blocking wall 11 and the blocking wall 12 from there, and comes into contact with the filling resin 14 filled in the closed space.

The electrolytic solution in contact with the filling resin 14 dissolves in the filling resin 14 while dissolving a part of the filling resin 14, and thereafter, the volatile component evaporates to reduce the volume. It is held in a safe state that is sufficiently shielded from the outside inside. Accordingly, it is possible to prevent the leaked electrolyte from being decomposed by external moisture and generating harmful substances.

The amount of the electrolyte dissolved in the filling resin 14 is determined by the volume of the filling resin 14. As described above, the space between the blocking wall 11 and the blocking wall 12 filled with the filling resin 14 is a closed space, and the volume of the filling resin 14 is limited by the volume of the closed space. for that reason,
The amount of the electrolytic solution dissolved in the filling resin 14 is also limited, and when the amount of the electrolytic solution dissolved in the filling resin 14 exceeds a certain amount, more electrolytic solution may not enter between the barrier walls 11 and 12. After that, the electrolyte leaked from the batteries 2a to 2d is confined in a space surrounded by the blocking wall 11, the side surface and the bottom surface of the case 4.

In general, since the viscosity of the electrolyte is very low, the electrolyte leaked from the batteries 2a to 2d may advance in the gap between the connection electrodes 13a to 13h and the filling resin 14 due to a capillary phenomenon. . However, the filling resin 14 located around the connection electrodes 13a to 13h expands its volume by dissolving the electrolytic solution transmitted on the surfaces of the connection electrodes 13a to 13h, and expands the volume thereof.
Since the gap between a to 13h and the filling resin 14 is completely closed, the electrolytic solution does not enter the electric circuit portion 3. This effect can be further enhanced by changing the shape of the connection electrodes 13a to 13h into a plate-like shape having a large surface area.

Further, when a neutralizing agent is used as the filling resin 14, it is possible to neutralize the leaked electrolyte, and in the event that the leaked electrolyte infiltrates the electric circuit portion 3, Even so, it is possible to suppress the electric circuit portion 3 from being damaged or short-circuited by the electrolytic solution.

Also, by neutralizing the leaked electrolyte, it is possible to prevent the leaked electrolyte from being decomposed by external moisture and generating harmful substances.

As described above, in this embodiment, the batteries 2a to 2d
And the electric circuit section 3 are separated by two blocking walls 11 and 12,
The connection electrodes 13a to 13h that electrically connect the batteries 2a to 2d and the electric circuit unit 3 are passed through the slits 11a to 11c, 12a, and 12b provided in the blocking walls 11 and 12, respectively. Since the connection electrodes 13a to 13h disposed between the batteries 12a and 12 are sealed with the filling resin 14, the infiltration of the electrolyte leaked from the batteries 2a to 2d into the electric circuit portion 3 can be sufficiently suppressed. .

Further, the leaked electrolytic solution is filled in the inside of the filling resin 14 disposed between the blocking wall 11 and the blocking wall 12 or in a space surrounded by the blocking wall 11 and the side and bottom surfaces of the case 4. Since it is confined in a safe state that is sufficiently shielded from the outside, it is possible to prevent harmful substances from being generated by the leaked electrolyte.

The present invention is not limited to the above embodiment. For example, in the present embodiment, the electrolyte penetration preventing structure 10 is configured inside the battery device 1 to prevent the electrolyte penetration from the batteries 2a to 2d into the electric circuit unit 3. The electrolyte intrusion prevention structure 10 may be provided at a connection portion of a battery to be mounted, thereby preventing the electrolyte leaked from the battery from entering the inside of the electronic device.

Next, a second embodiment of the present invention will be described. This embodiment is a modification of the first embodiment, and has only one barrier wall and uses a neutralizing agent as a filling resin. In the following, description will be made focusing on differences from the first embodiment, and description of items common to the first embodiment will be omitted.

FIG. 5 shows a battery device 2 according to this embodiment.
FIG. 2 is a plan view illustrating a configuration of a zero. For convenience of explanation, FIG. 5 does not show a cover or the like put on the upper surface.

The battery device 20, for example, mainly receives a case 21 that covers the bottom and side surfaces thereof, batteries 22a to 22h serving as power generation sources, and power generated by the batteries 22a to 22h, and controls the output thereof. It is constituted by an electric circuit portion 24 including a circuit, and an electrolytic solution intrusion prevention structure 30 for preventing infiltration of the electrolytic solution leaked from the batteries 22a to 22h into the electric circuit portion 24.

The electrolyte intrusion prevention structure 30 has, for example, a plate shape with a slit formed therein, and has a cut-off wall 32 disposed at a portion between the battery and the electric circuit portion.
The connection electrodes 33a to 33h are electrically connected to the output units 2a to 22h, penetrate the slit, and the other ends are electrically connected to the electric circuit unit 24, and are filled in contact with the blocking wall 32, At least a part of the connection electrodes 33a to 33h arranged on the side of the batteries 22a to 22h is sealed, and the battery 22a
It is constituted by a filling resin 31 which is a neutralizing agent for neutralizing the electrolyte leaked from the liquid electrolyte from 22h. The details of each component are the same as those in the first embodiment, and a description thereof will not be repeated.

As exemplified in FIG. 5, batteries 22a to 22a
h is housed in the case 21 so that its longitudinal direction is substantially parallel to the electric circuit section 24, for example. For example, the blocking wall 32 is arranged so as to separate an area where the electric circuit unit 24 is arranged and an area where the batteries 22a to 22h are arranged, and the battery 22 is arranged in the same manner as in the first embodiment.
connection electrodes 33 electrically connected to the output units a to 22h
a to 33h are electrically connected to the electric circuit unit 24 through slits (not shown) of the blocking wall 32.
The filling resin 31 is, for example, the batteries 22 a to 22
The space between the blocking wall 32 and the batteries 22e to 22h is filled in a state of contacting the 2h side surface and the side surfaces of the batteries 22e to 22h. At this time, the blocking wall 32 of the connection electrodes 33a to 33h
The portion located between the battery 22e and the batteries 22e to 22h is sealed by the filling resin 31.

Thus, as in the present embodiment, the battery 22a
To 22h and the electric circuit portion 24 are separated by a blocking wall 32, and connection electrodes 33a to 33h electrically connecting the batteries 22a to 22h and the electric circuit portion 24 are made to pass through slits provided in the blocking wall 32. , Blocking wall 32 and batteries 22e to 22h
Also, the connection electrodes 33a to 33h located between the batteries 22a to 33h are sealed with the filling resin 31 as a neutralizing agent, similarly to the first embodiment, the electric circuit portion 24 of the electrolyte leaked from the batteries 22a to 22h. It is possible to sufficiently suppress infiltration into the air.

When a neutralizing agent is used as the filling resin 31 as in the present embodiment, it is possible to neutralize the leaked electrolyte, and the leaked electrolyte may enter the electric circuit portion 24 by any chance. Even in the case where it has been done, it is possible to prevent the electrolytic solution from damaging or short-circuiting the electric circuit section 24.

Further, by neutralizing the leaked electrolyte, the leaked electrolyte is decomposed by external moisture,
It is possible to prevent harmful substances from being generated.

The present invention is not limited to the above embodiment. For example, in the present embodiment, the electrolytic solution intrusion prevention structure 30 is configured inside the battery device 20 to prevent the electrolytic solution from entering the electric circuit unit 24 from the batteries 22a to 22h. The electrolyte intrusion prevention structure 30 may be provided at a connection portion of a battery to be mounted, so that the electrolyte leaked from the battery may be prevented from entering the inside of the electronic device.

In this embodiment, a neutralizing agent is used for the filling resin 31. However, similar to the first embodiment, the filling resin 31 may be a thermoplastic resin such as a polyamide resin or a polyolefin resin. Water-containing resin such as silicone resin,
A configuration using a resin or the like containing an acrylic resin as a main component may be employed.

Further, the arrangement of the blocking wall, the filling resin and the like is not limited to the above embodiment. For example, FIG.
As shown in the battery device 40 illustrated in FIG.
2 and the battery 42a to 42d
May be sealed with the filling resin 51 to prevent the infiltration of the electrolyte from the batteries 42a to 42d into the electric circuit section 44. When the battery is a lithium ion battery, the leakage of the electrolytic solution is particularly large from the positive electrode portion. Thus, the positive electrode portion is filled with the resin 5
The sealing with 1 makes it possible to efficiently absorb and neutralize the electrolyte leaked from the positive electrode portion as described above, and prevent the electrical circuit section 44 from being damaged or short-circuited by the electrolyte. It becomes possible. In addition,
Although connection electrodes are not shown in FIG. 6 for simplicity of description, they are actually electrically connected to the batteries 42a to 42d as in the first embodiment and the second embodiment. The connection electrode is connected to the electric circuit section 44 through a slit (not shown) of the blocking wall 52, and a part of the connection electrode is sealed with the filling resin 51.

The battery device 60 illustrated in FIG.
The batteries 62a to 62h stored in the case 61 as shown in FIG.
And the electric circuit portion 64 may be separated from each other by a blocking wall 72, and the whole of the batteries 62 a to 62 h may be sealed with the filling resin 71. This makes it possible to more reliably prevent the electric circuit portion 64 from being damaged or short-circuited by the electrolyte leaked from the batteries 62a to 62h.

Further, in the battery device 1 exemplified in the first embodiment, at least a part of the batteries 2a to 2d may be sealed with a neutralizing agent. Next, a third embodiment of the present invention will be described.

This embodiment is an application of the second embodiment, and differs from the second embodiment mainly in that a film sheet is used instead of a blocking wall. The following mainly describes differences from the first embodiment and the second embodiment. Items common to the first embodiment and the second embodiment will be described. Omitted.

FIG. 8 shows a battery device 8 according to this embodiment.
FIG. 9A is a plan view illustrating the configuration of FIG.
FIG. 9 is a cross-sectional view showing a CC cross-sectional view of FIG.
(B) is a perspective view illustrating the configuration of the filling resin 91b. For convenience of explanation, FIG. 8 does not show a cover or the like placed on the upper surface.

For example, the battery device 80 mainly receives a case 81 covering the bottom and side surfaces thereof, batteries 82a to 82h serving as power generation sources, and power generated from the batteries 82a to 82h, and controls the output thereof. It is composed of an electric circuit board 84 including a circuit, and an electrolyte intrusion prevention structure 90 for preventing the electrolyte leaked from the batteries 82a to 82h from entering the electric circuit board 84.

The electrolyte intrusion prevention structure 90 is mainly composed of, for example, a film sheet 92 made of a thin film-like resin that covers one side of the electric circuit board 84, and one end of the battery 82 a-8.
2h, the connection electrodes 93a to 93h, the other ends of which are electrically connected to the electric circuit board 84, and the film sheet 92 in contact with the film sheet 92.
Resin 91 charged between the battery and the batteries 82a to 82h
a, 91b.

The film sheet 92 is, for example, a film-like sheet provided with slits for penetrating the connection electrodes 93a to 93h. As a material constituting the film sheet 92, a material that is not eroded by the electrolyte leaked from the batteries 82a to 82h and that does not allow the electrolyte to pass therethrough, such as a polyimide resin processed into a thin film, It can be used without particular limitation.
The film sheet 92 is disposed so as to cover one side of the electric circuit board 84, for example, the entire surface on which the electric circuit is not formed. For example, connection electrodes 93a to 93h to which output portions of the batteries 82a to 82h are electrically connected pass through the slits of the film sheet 92, and the other ends of the connection terminals are connected to the electric circuit board 84. Is electrically connected to

As illustrated in FIG. 9B, the filling resin 91 b is, for example, a substantially triangular prism having a substantially right triangle as a bottom surface, and one side surface (case contact surface 91 bb) of the filling resin 91 b is formed on the inner bottom surface of the case 81. The other side surface (film sheet contact surface 91bc) is in contact with the surface of the film sheet 92, and the other side surface (battery contact surface 91ba) is in contact with the batteries 82e to 82h, respectively. ~ 82h. The filling resin 9
9a, except that the top and bottom are inverted.
(B). In this embodiment, as in the first embodiment, the filling resins 91a and 91a
b is preferably a waterproof resin, for example, a thermoplastic resin such as a polyamide resin or a polyolefin resin,
A water-containing resin such as a silicon resin (silicon bond / silyl group-containing polymer) can be used. Also,
As the filling resins 91a and 91b, a resin mainly composed of an acrylic resin or a neutralizing agent may be used. Also,
In order to efficiently absorb the electrolyte leaked from the batteries 82a to 82h, the filling resins 91a and 91b are desirably resins having a large intermolecular force.

As described above, according to the present embodiment, the battery 82a
82h and the electric circuit board 84 are separated by a film sheet 92, and the film sheet 92 and the batteries 82e to 82h are sealed with the filling resins 91a and 91b, as in the first embodiment. It is possible to sufficiently suppress the infiltration of the electrolyte leaking from the electric circuit board 84 into the electrolyte.

In this embodiment, the electric circuit board 84 is formed by the film sheet 92 made of a thin resin film.
Since the battery and the batteries 82a to 82h are separated from each other, the occupied area occupied by the electrolyte intrusion prevention structure 90 can be reduced, and the shape of the battery device 80 can be reduced.

The present invention is not limited to the above embodiment. For example, in the present embodiment, the electrolytic solution intrusion prevention structure 90 is configured inside the battery device 80 to prevent the electrolytic solution from entering the electric circuit board 84 from the batteries 82a to 82h. The electrolyte intrusion prevention structure 90 may be provided at a connection portion of a battery to be mounted, thereby preventing the electrolyte leaked from the battery from entering the inside of the electronic device. In this case, the battery and the electric circuit board are separated by a thin film sheet.
Even in a case where there is no space for providing a blocking wall as in the embodiment, it is possible to prevent the electrolyte leaked from the battery from entering the inside of the electronic device.

As shown in FIG. 10, the neutralizing agents 112a and 112b may be arranged around the connector 111 of the electronic device main body 110 to which the connector 103 as the output terminal of the battery device 100 is connected. . Thereby, the connector 1 of the battery device 100
The electrolyte leaked from the 03 part is neutralized with the neutralizers 112a and 112a.
b makes it possible to neutralize, and it is possible to prevent the electronic device main body 110 from being damaged by the leaked electrolytic solution. In this case, the batteries 102a to 102 inside the case 101 of the battery device 100
As in the above-described first to third embodiments, a configuration may be adopted in which d and the electric circuit unit 104 are separated by a film sheet, a blocking wall, a filling resin, or the like.

As illustrated in FIG. 11, a lower portion of the connector 131 of the electronic device main body 130 to which the connector 123 as the output terminal of the battery device 120 is connected, and a bottom surface of the battery device 120 are arranged. The configuration may be such that the neutralizing agents 132a and 132b are disposed in the portions. As a result, the electrolyte leaked from the connector 123 of the battery device 120 is neutralized with the neutralizing agent 132a,
132b makes it possible to neutralize, and it is possible to prevent the electronic device main body 130 from being damaged by the leaked electrolyte. In this case, as in the first to third embodiments, the battery 122a and the electric circuit portion 124 inside the case 121 of the battery device 120 are separated by a film sheet, a blocking wall, a filling resin, or the like. Is also good.

[0063]

As described above, according to the present invention, the battery and the electric circuit portion are separated from each other by the first cut-off wall and the first cut-off wall, and the connection electrode electrically connects the battery and the electric circuit portion. Through a first blocking wall and a slit provided in the first blocking wall, and sealing a connection electrode disposed between the first blocking wall and the second blocking wall with a filling resin. Therefore, the infiltration of the electrolyte leaked from the battery into the electric circuit portion can be sufficiently suppressed.

Further, the leaked electrolyte is surrounded by the inside of the filling resin disposed between the first and second blocking walls, or by the first and second blocking walls and the side and bottom surfaces of the case. Since it is confined in a safe space, which is sufficiently shielded from the outside, it is possible to prevent harmful substances from being generated by the leaked electrolyte.

[Brief description of the drawings]

FIG. 1 is a plan view illustrating the configuration of a battery device.

FIG. 2 is an enlarged plan view of a portion A in FIG.

FIG. 3 is a sectional view taken along the line BB in FIG. 2;

FIG. 4 is a sectional view taken along line BB in FIG. 2;

FIG. 5 is a plan view illustrating the configuration of a battery device.

FIG. 6 is a plan view illustrating the configuration of the battery device.

FIG. 7 is a plan view illustrating the configuration of the battery device.

FIG. 8 is a plan view illustrating the configuration of a battery device.

9A is a cross-sectional view illustrating a cross-sectional view taken along the line CC in FIG. 8, and FIG. 9B is a perspective view illustrating a configuration of a filling resin.

FIG. 10 is a plan view illustrating the configurations of a battery device and an electronic device main body.

FIG. 11 is a cross-sectional view illustrating a configuration of a battery device and an electronic device main body.

[Explanation of symbols]

1, 20, 40, 60, 80, 100, 120 ... battery device, 2a to 2d, 22a to 22h, 42a to 42
d, 62a-62h, 82a-82h, 102a-10
2d, 122a ... batteries, 3, 24, 44, 64, 10
4, 124 ... electric circuit part, 84 ... electric circuit board, 10,
30, 90 ... Electrolyte intrusion prevention structure, 11, 12, 3
2, 52, 72: blocking wall, 92: film sheet, 11
a to 11c, 12a, 12b ... slits, 13a to 13
h, 33a to 33h, 93a to 93h: connection electrode, 1
4, 31, 51, 71, 91a, 91b ... Filled resin

 ──────────────────────────────────────────────────の Continuing on the front page (72) Yoshie Kawai, 1st section of Sakazaki, Sakazaki, Koda-cho, Nada-gun, Aichi Prefecture Inside Sony Koda Co., Ltd. (72) Hiratani Akama, Sakazaki, Koda-cho, Nada-gun, Aichi No. 1 Jiyugagairi Sony Koda Co., Ltd. F-term (reference) 5H040 AA34 AS11 DD08 LL06

Claims (19)

[Claims] 1. An electrolyte permeation preventing structure for preventing an electrolyte leaked from a battery from entering an electric circuit portion, wherein the structure has a plate shape with a first slit formed therein, and the battery and the electric circuit portion And a first blocking wall disposed on the battery side in a portion between the battery and the electric circuit side in a portion between the battery and the electric circuit portion having a plate shape in which a second slit is formed. A second blocking wall disposed, one end of which is electrically connected to an output of the battery;
A connection electrode that penetrates the slit and the second slit, and the other end of which is electrically connected to the electric circuit unit, is filled between the first blocking wall and the second blocking wall, And a filling resin disposed between the first blocking wall and the second blocking wall to seal the connection electrode. 2. The structure according to claim 1, wherein the connection electrode is formed in a plate shape. 3. The structure according to claim 1, wherein the filling resin is a waterproof resin. 4. The structure according to claim 1, wherein the filling resin is a resin containing an acrylic resin as a main component. 5. The structure according to claim 1, wherein the filling resin is a neutralizing agent for neutralizing the electrolyte leaked from the battery. 6. When the electrolyte leaked from the battery becomes acidic, an alkaline substance is used as the filling resin, and when the electrolyte leaked from the battery becomes alkaline, a halide is used. 6. The method according to claim 5, wherein
The electrolyte infiltration preventing structure according to the above. 7. The structure for preventing infiltration of an electrolyte according to claim 1, wherein a space between the first blocking wall filled with the filling resin and the second blocking wall is a substantially closed space. body. 8. A battery device having a function of preventing infiltration of an electrolyte leaking from a battery into an electric circuit portion, wherein the battery device has a plate shape with a first slit formed therein, and the battery and the electric circuit portion A first blocking wall disposed on the battery side in a portion between the battery and a plate formed with a second slit, and disposed on the electric circuit side in a portion between the battery and the electric circuit portion; One end is electrically connected to the output part of the battery,
A connection electrode that penetrates the slit and the second slit, and the other end of which is electrically connected to the electric circuit unit, is filled between the first blocking wall and the second blocking wall, A filling resin for sealing the connection electrode disposed between the first blocking wall and the second blocking wall. 9. The battery device according to claim 8, wherein the connection electrode is formed in a plate shape. 10. The battery device according to claim 8, wherein the filling resin is a waterproof resin. 11. The battery device according to claim 8, wherein the filling resin is a resin containing an acrylic resin as a main component. 12. The battery device according to claim 8, wherein the filling resin is a neutralizing agent for neutralizing the electrolyte leaked from the battery. 13. An alkaline substance is used as the filling resin when the electrolyte leaked from the battery becomes acidic, and a halide is used when the electrolyte leaked from the battery becomes alkaline. The battery device according to claim 12, wherein: 14. The battery device according to claim 8, wherein a space between the first blocking wall filled with the filling resin and the second blocking wall is a substantially closed space. 15. A battery device having a function of preventing electrolyte leaked from a battery from entering an electric circuit portion, wherein the battery device has a plate shape with a slit formed, and a portion between the battery and the electric circuit portion. A connection electrode, one end of which is electrically connected to the output portion of the battery, one end of which penetrates the slit, and the other end of which is electrically connected to the electric circuit portion; And a neutralizing agent that is filled in a contacted state, seals at least a part of the connection electrode disposed on the battery side, and neutralizes the electrolyte leaked from the battery. Battery device. 16. The battery device according to claim 15, wherein the neutralizing agent seals the entire battery. 17. An alkaline substance is used as the filling resin when the electrolyte leaked from the battery becomes acidic, and a halide is used when the electrolyte leaked from the battery becomes alkaline. The battery device according to claim 15, wherein: 18. A battery device having a function of preventing infiltration of an electrolyte leaking from a battery into an electric circuit portion, comprising: an electric circuit board on which an electric circuit is formed; and a film covering one side of the electric circuit board. A battery device comprising: a film sheet that is a thin resin; and a filling resin that is filled between the film sheet and the battery while being in contact with the film sheet. 19. The battery device according to claim 18, wherein the filling resin is a resin containing an acrylic resin as a main component.