JP7360861B2 - battery - Google Patents

Description

The present invention relates to a structure and a battery.

BACKGROUND ART Conventionally, in batteries in which an electrolyte is housed in a housing, it has been required to suppress leakage of the electrolyte. As a technique for suppressing electrolyte leakage, Patent Document 1 listed below describes a battery in which an O-ring is disposed between a battery terminal and a housing.

Japanese Patent Application Publication No. 2012-138207

By the way, from the viewpoint of improving battery characteristics, safety, etc., it is required to further suppress leakage of the electrolyte in a battery in which an electrolyte is housed in a housing.

One aspect of the present invention is to provide a structure capable of obtaining a battery that can suppress leakage of electrolyte. Another aspect of the present invention is to provide a battery that can suppress leakage of electrolyte.

One possible method for suppressing electrolyte leakage is to apply an adhesive to areas where electrolyte tends to leak. In contrast, the present inventor found that even when applying an adhesive, it may be difficult to sufficiently improve the electrolyte leakage suppressing effect, and the inventors discovered that it may be difficult to sufficiently improve the leakage suppression effect of the electrolyte even when applying an adhesive. It has been found that an excellent leakage suppressing effect can be obtained by applying it to the site.

According to one aspect of the present invention, there is provided a structure for use in a battery, which includes a lid member in which a through hole is formed, a rod portion that is inserted into the through hole, and a flange portion that is not inserted through the through hole. a fastening member that is disposed on the opposite side of the flange portion to the lid member and fastens the conductive rod to the lid member by drawing the flange portion toward the lid member; an annular first sealing member that is inserted through the ring and is disposed between the flange portion and the lid member, and a first sealing member that contacts the first sealing member between the lid member and the flange portion; 1 adhesive and a second adhesive disposed between the inner peripheral part of the fastening member and the rod part, and the first adhesive and the second adhesive are applied. A structure including a silicone compound is provided.

According to another aspect of the present invention, a battery includes the above-described structure, a casing to which the lid member of the structure is attached, and an electrode and an electrolyte housed in the casing. provide.

According to such a structure and battery, it is possible to suppress leakage of the electrolytic solution, and an excellent leakage suppressing effect can be obtained.

According to one aspect of the present invention, it is possible to provide a structure that makes it possible to obtain a battery that can suppress leakage of electrolyte. According to another aspect of the present invention, it is possible to provide a battery that can suppress leakage of electrolyte.

FIG. 1 is a front view of a battery according to one embodiment. FIG. 2 is a cross-sectional view schematically showing the vicinity of a conductive rod in a structure according to an embodiment. FIG. 3 is an exploded cross-sectional view schematically showing the vicinity of a conductive rod in a structure according to an embodiment. FIG. 4 is a cross-sectional view for explaining a method of manufacturing a structure according to one embodiment. FIG. 5 is a cross-sectional view for explaining a method of manufacturing a structure according to one embodiment. FIG. 6 is a cross-sectional view schematically showing the vicinity of a conductive rod in a structure according to another embodiment.

Embodiments of the present invention will be described below.

The structure according to this embodiment is a structure used for a battery (a battery structure). The structure according to the present embodiment includes a lid member in which a through hole is formed, a rod portion inserted into the through hole, a conductive rod having a flange portion not inserted into the through hole, and a conductive rod that has a flange portion that is not inserted into the through hole. a fastening member that is disposed on the opposite side of the flange portion and fastens the conductive rod to the lid member by drawing the flange portion toward the lid member; an annular first sealing member disposed between the lid members, a first adhesive contacting the first sealing member between the lid member and the flange portion, and a first adhesive of the fastening member. a second adhesive disposed between the inner peripheral portion and the rod portion, the first adhesive and the second adhesive containing a silicone compound. The battery according to this embodiment includes the structure according to this embodiment, a casing to which the lid member of the structure is attached, and an electrode and an electrolyte housed in the casing. Examples of the battery include zinc batteries such as a nickel-zinc battery (nickel-zinc secondary battery), a zinc-air battery (nickel-zinc secondary battery), and a silver-zinc battery (silver-zinc secondary battery).

In the structure according to the present embodiment, the first seal member is compressed by the conductive rod being fastened to the lid member by the fastening member, so that the first seal member connects between the flange portion and the lid member. At the same time, a seal is formed between the outer circumference of the rod portion of the conductive rod and the lid member. By applying an adhesive containing a silicone compound as the first adhesive that contacts the first sealing member between the lid member and the flange, the first adhesive between the lid member and the flange is applied. Leakage of the electrolytic solution from the gap around the seal member is suppressed. Furthermore, by applying an adhesive containing a silicone compound as the second adhesive disposed between the inner circumference of the fastening member and the rod, the inner circumference of the fastening member and the rod can be bonded. Leakage of the electrolyte from the gap is suppressed. Adhesives containing silicone compounds have suitable elasticity, which prevents gaps from forming between the adhesive and the adhered object even when temperature changes occur due to battery operation. It is assumed that this will help prevent leakage. As described above, according to the structure according to the present embodiment and the battery including the structure, leakage of the electrolyte can be suppressed, and an excellent leakage suppressing effect can be obtained.

An example of a battery and a structure according to this embodiment will be explained using FIGS. 1 to 3. The battery 100 shown in FIGS. 1 to 3 includes a structure 110, a housing 120, an electrode group (electrode) 130 and an electrolyte (not shown) housed in the housing 120. The structure 110 includes a lid member 10, two conductive rods 20, two fastening members 30, two seal members (first seal members) 40, and two seal members (second seal members) 50. and. The lid member 10 of the structure 110 is attached to the housing 120.

Two through holes 10a passing through the lid member 10 are formed in the lid member 10. The lid member 10 is, for example, a rectangular flat plate, and the two through holes 10a are arranged so as to sandwich the center of the lid member 10.

The conductive rod 20 is an output terminal for extracting electricity from the electrode group 130. One of the conductive rods 20 is inserted into one of the through holes 10 a of the lid member 10 and electrically connected to the positive electrode of the electrode group 130 . The other conductive rod 20 is inserted into the other through hole 10a of the lid member 10 and electrically connected to the negative electrode of the electrode group 130. The conductive rod 20 only needs to have conductivity, and may be a metal rod, a carbon rod, or the like. The two conductive bars 20 may have the same configuration or may have different configurations.

The conductive rod 20 has a rod portion 22 that is inserted into the through hole 10a of the lid member 10, and a flange portion 24 that is not inserted into the through hole 10a. The rod portion 22 is a portion extending in a rod shape. The flange portion 24 is connected to the rod portion 22 adjacent to the rod portion 22, and is a portion having an enlarged diameter relative to the rod portion 22. The flange portion 24 is, for example, cylindrical. The outer diameter of the rod portion 22 is smaller than the inner diameter of the through hole 10a, and the outer diameter of the flange portion 24 is larger than the inner diameter of the through hole 10a. Therefore, the rod portion 22 can be inserted into the through hole 10a, but the flange portion 24 cannot be inserted into the through hole. The rod portion 22 is inserted into the through hole 10a so that the flange portion 24 is disposed outside the housing 120.

The rod portion 22 has a threaded portion 22a and a cylindrical portion 22b. The threaded portion 22a is a portion in which a thread groove is formed on the outer periphery, and is formed at the tip of the rod portion 22 on the opposite side from the flange portion 24. The cylindrical portion 22b is a portion in which no thread groove is formed on the outer periphery, and is formed at a position adjacent to the flange portion 24 of the rod portion 22. A screw hole 24a extending in the axial direction (longitudinal direction) of the conductive rod 20 is formed on the surface of the flange portion 24 opposite to the screw portion 22a. For example, an external terminal or the like is screwed into the screw hole 24a. In the structure 110 of the battery 100, since the flange portion 24 is disposed outside the lid member 10, a screw hole 24a for connecting an external terminal can be formed in the flange portion 24. Note that the output terminal of the battery 100 may be composed of the conductive rod 20 alone, or may be composed of the conductive rod 20 and an external terminal screwed into the screw hole 24a.

The fastening member 30 is arranged on the opposite side of the flange portion 24 with respect to the lid member 10. The fastening member 30 fastens the conductive rod 20 to the lid member 10 by drawing the flange portion 24 toward the lid member 10 side. The fastening member 30 is, for example, a nut placed inside the housing 120. Since the fastening member 30 is a nut, the conductive rod 20 can be easily fastened to the lid member 10. The fastening member 30 is fastened to the threaded portion 22a of the conductive rod 20 inside the housing 120. The fastening member 30 is tightened by the threaded portion 22a to draw the flange portion 24 toward the lid member 10 and fasten the conductive rod 20 to the lid member 10 (casing 120).

The fastening member 30 may be any member as long as it is disposed on the opposite side of the flange portion 24 to the lid member 10 and can fasten the conductive rod 20 to the lid member 10 by drawing the flange portion 24 toward the lid member 10 side. You can. Examples of fastening members 30 other than nuts include a clamp member that clamps the conductive rod 20 and presses the lid member 10 with a biasing member such as a spring on the opposite side of the flange portion 24 to the lid member 10; a flange portion for the lid member 10; On the opposite side of 24, a screw, a rivet, or the like may be used to hold the conductive rod 20 in a state where the conductive rod 20 presses the lid member 10.

The seal member 40 is an annular (for example, annular) member disposed between the flange portion 24 and the lid member 10. The sealing member 50 is an annular (for example, annular) member disposed between the fastening member 30 and the lid member 10. Examples of the seal member 40 and/or the seal member 50 include an O-ring, a washer (for example, a seal washer), and the like. The seal member 40 and the seal member 50 may be the same member or may be different members.

The seal member 40 and/or the seal member 50 may be a member (for example, a seal washer) that includes an annular elastic member and a holding member that holds the elastic member on the outer peripheral side of the elastic member. For example, when the seal member 50 is such a member, when the conductive rod 20 is fastened to the housing 120 by the fastening member 30 and the seal member 50 is compressed, the elastic member of the seal member 50 moves in the compression direction. However, since the holding member holds at least a portion of the elastic member from the outer circumferential side of the sealing member 50, the outward extension in the radial direction is restricted. Ru. As a result, the elastic member extends inward in the radial direction and is pressed against the rod portion 22 of the conductive rod 20, so that the sealing member 50 also creates a gap between the fastening member 30 and the housing 120 due to the fastening force of the fastening member 30. Since it is possible to seal not only between the rod portion 22 of the conductive rod 20 and the housing 120, leakage of the electrolyte can be further suppressed.

The rod portion 22 of the conductive rod 20 is inserted through the seal member 40 and the seal member 50. The cylindrical portion 22b of the rod portion 22 is inserted into the sealing member 40, and the threaded portion 22a of the rod portion 22 is inserted into the sealing member 50. The sealing member 40 is arranged at a position corresponding to the cylindrical part 22b of the rod part 22, and the sealing member 50 is arranged at a position corresponding to the threaded part 22a of the rod part 22. The threaded portion 22a is not provided at a position corresponding to the sealing member 40 on the rod portion 22, but is provided at a position corresponding to the sealing member 50 on the rod portion 22. Since the threaded portion 22a is not provided at the position corresponding to the seal member 40 on the rod portion 22, the seal member 40 is pressed against the rod portion 22 without any gap, thereby easily suppressing leakage of the electrolyte.

By fastening the conductive rod 20 to the lid member 10 by the fastening member 30, the sealing member 40 seals between the flange portion 24 and the lid member 10, and also seals between the outer circumference of the rod portion 22 (cylindrical portion 22b). A seal is formed between the lid member 10 and the lid member 10. By fastening the conductive rod 20 to the lid member 10 by the fastening member 30, the sealing member 50 seals between the fastening member 30 and the lid member 10, and also seals between the outer circumference of the rod portion 22 (threaded portion 22a). A seal is formed between the lid member 10 and the lid member 10. By providing the structure 110 with the seal member 50 in addition to the seal member 40, leakage of the electrolyte can be further suppressed.

As the constituent material of the seal member 40 and/or the seal member 50, a material having resistance to electrolyte can be used. Examples of the constituent materials of the seal member 40 and/or the seal member 50 include ethylene-propylene-diene copolymer (EPDM), acrylonitrile-butadiene rubber (NBR), hydrogenated nitrile rubber (HNBR), and tetrafluoroethylene resin. (PTFE) and other elastic materials. When the sealing member 40 or the sealing member 50 has the above-described elastic member and holding member, an elastic member containing an elastic material and a holding member containing a metal material (for example, SUS) can be used. The constituent materials of the seal member 40 and the seal member 50 may be the same or different.

In the structure 110 of the battery 100, the first adhesive 60 that contacts the sealing member 40 between the lid member 10 and the flange portion 24 is disposed between the inner peripheral portion 30a of the fastening member 30 and the rod portion 22 (e.g. A filled second adhesive 70 is applied, and the first adhesive and the second adhesive include a silicone compound.

The first adhesive 60 is in contact with at least a portion of the seal member 40. The first adhesive 60 is applied, for example, to the outer circumferential side of the sealing member 40 between the lid member 10 and the flange portion 24, and is applied around the outer circumferential side of the sealing member 40 along the shape of the annular sealing member 40. may be given to When obtaining the structure 110, for example, as shown in FIG. The rod portion 22 can be inserted into the through hole 10a of the lid member 10 after being attached to the side. The first adhesive 60 may be further applied between the seal member 40 and the lid member 10, between the seal member 40 and the flange portion 24, on the inner peripheral side of the seal member 40, etc. The first adhesive 60 may contact the lid member 10 and/or the flange portion 24 .

The second adhesive is in contact with the inner peripheral portion 30a of the fastening member 30 and the rod portion 22. The second adhesive may be disposed along the axial direction (longitudinal direction) of the rod portion 22 between the inner peripheral portion 30a of the fastening member 30 and the rod portion 22, and the second adhesive may be disposed between the inner peripheral portion 30a of the fastening member 30 and the rod portion 22. It may be in contact with some or all of the parts. When obtaining the structure 110, for example, as shown in FIG. After applying the adhesive 70 or its precursor to the outer periphery of the exposed portion of the rod portion 22, the rod portion 22 can be inserted into the fastening member 30 (screwing the threaded portion 22a).

The first adhesive and the second adhesive are silicone adhesives containing a silicone compound or a precursor thereof. The silicone compound has a siloxane bond (-Si-O-Si-). The first adhesive and/or the second adhesive may be a cured product of a silicone compound precursor (a compound that provides a silicone compound; for example, a compound represented by general formula (A1) described below). . The cured product may be obtained by curing the precursor at room temperature.

The silicone compound may have a polyalkylene group, and may have a molecular chain having alternating polyalkylene groups and siloxane bonds. The silicone compound may include a condensation product of a compound having a polyalkylene group and an alkoxysilyl group bonded to both ends of the polyalkylene group, and may have a structural unit derived from the compound. Examples of the polyalkylene group include a methylene group, an ethylene group, a propylene group (n-propylene group, iso-propylene group, etc.), a butylene group, and the like. Examples of the alkoxy group in the alkoxysilyl group include a methoxy group and an ethoxy group. The number of alkoxy groups in the alkoxysilyl group may be 1 to 3, and may be 1 or 2. The number of alkoxy groups in the alkoxysilyl groups bonded to both ends of the polyalkylene group may be the same or different.

The silicone compound may include a condensate of a compound represented by the following general formula (A1), and may have a structural unit derived from the compound represented by the following general formula (A1). The silicone compound may have a structure represented by the following general formula (A2), for example.

(In the formula, m represents an integer of 1 or more.)

(In the formula, m1 and m2 each independently represent an integer of 1 or more.)

The housing 120 is, for example, a container that houses the electrode group 130 and the electrolyte. The housing 120 seals the electrode group 130 and the electrolyte. The housing 120 is, for example, a box having an opening open on one side, and has a housing space therein for housing the electrode group 130 and the electrolyte. The housing 120 and the lid member 10 may be integrated by attaching the lid member 10 to the housing 120 by welding or the like after housing the electrode group 130 and the electrolyte inside the housing 120.

The electrode group 130 includes, for example, a positive electrode and a negative electrode facing each other with a separator interposed therebetween. In the electrode group 130, the positive electrodes and the negative electrodes are connected to each other by, for example, a strap. When the battery 100 is a nickel-zinc battery, for example, a nickel electrode is used for the positive electrode and a zinc electrode is used for the negative electrode. When the battery 100 is a zinc-air battery, for example, an air electrode is used for the positive electrode and zinc is used for the negative electrode. When the battery 100 is a silver-zinc battery, for example, a silver electrode is used for the positive electrode and zinc is used for the negative electrode.

The electrolytic solution contains, for example, a solvent and an electrolyte. When the battery 100 is a nickel-zinc battery, for example, potassium hydroxide can be used as the electrolyte. When the battery 100 is a zinc-air battery, for example, potassium hydroxide can be used as the electrolyte. When the battery 100 is a silver-zinc battery, for example, potassium hydroxide or sodium hydroxide can be used as the electrolyte.

Although an example of the battery and structure according to the present embodiment has been described above, the present invention is not limited to the above embodiment.

For example, in the embodiment described above, the lid member 10 has a plurality of through holes 10a, but the lid member may have only one through hole. Similarly, the number of various members such as conductive rods in the structure may be plural or only one.

In the above embodiment, two sealing members, the sealing member 40 and the sealing member 50, are used, but the structure (battery structure) includes the fastening member 30 and the lid member, as in the structure 110a shown in FIG. 10 may not be provided.

In the above embodiment, the flange portion 24 of the conductive rod 20 is placed outside the housing 120, and the fastening member 30 is placed inside the housing, but the flange portion of the conductive rod is placed inside the housing. , the fastening member may be arranged outside the housing.

In the above embodiment, the threaded portion 22a is not provided at a position corresponding to the sealing member 40 on the rod portion 22, but is provided at a position corresponding to the sealing member 50 on the rod portion 22, but the threaded portion 22a is , may be provided at a position corresponding to the sealing member 40 on the rod portion 22, or may not be provided at a position corresponding to the sealing member 50 on the rod portion 22. Further, in the above embodiment, the rod portion 22 has the threaded portion 22a and the cylindrical portion 22b, but it is not necessary to have either the threaded portion or the cylindrical portion.

EXAMPLES Hereinafter, the content of the present invention will be explained in more detail using examples, but the present invention is not limited to the following examples.

<Preparation of structure>
Battery structures of Examples and Comparative Examples were produced at room temperature (25° C.) according to the following procedure.

(Example)
After preparing two conductive rods having a disk-shaped flange portion and a rod portion extending from the center of the main surface of the flange portion, seal member A (O-ring, material: EPDM, inner diameter: 5 mm, wire diameter: The rod portion was inserted through the seal member A so that the rod portion (1.8 mm) was in contact with the flange portion. At this time, the inner peripheral side of the seal member A was in contact with the rod portion. One of the conductive rods was for a positive electrode, and the material of the conductive rod for the positive electrode was Ni-plated copper. The other conductive rod was for the negative electrode, and the material of the negative electrode conductive rod was Sn-plated copper.
A silicone adhesive (trade name: 1533F, manufactured by Three Bond Co., Ltd.) was applied to the exposed portion (outer periphery, etc.) of the O-ring.
After preparing a lid member (material: Asahi Kasei Corporation, product name: Zylon TZ100) having two through holes, a rod portion of a conductive rod was inserted into each through hole of the lid member until the O-ring came into contact with the lid member. . At this time, the above-mentioned silicone adhesive was brought into contact with the lid member and the flange on the outer circumferential side of the O-ring to temporarily fix it.
A seal washer having a seal member B (an annular elastic member and a holding member that holds the elastic member on the outer circumferential side of the elastic member on the opposite side of the flange portion to the lid member, manufactured by NOK Corporation, product name: SUSWF) -6. The rod portion was inserted into the sealing member B so that the material of the elastic member: NBR and the material of the holding member: SUS) came into contact with the lid member. At this time, the inner peripheral side of the seal member B was in contact with the rod portion.
On the opposite side of the flange to the lid member, a silicone adhesive (trade name: 1533F, manufactured by Three Bond Co., Ltd.) was applied to the outer circumferential portion of the rod portion exposed from the seal member B.
A nut (M6, material: Ni-plated copper) was fastened to the rod portion on the opposite side of the flange portion to the lid member. The nut tightening torque was 1.4 N·m.
By leaving it for one day, a structure having a conductive rod inserted into the through hole of the lid member was obtained.

(Comparative example)
Two conductive rods having a disk-shaped flange portion and a rod portion extending from the center of the main surface of the flange portion were prepared. One of the conductive rods was for a positive electrode, and the material of the conductive rod for the positive electrode was Ni-plated copper. The other conductive rod was for the negative electrode, and the material of the negative electrode conductive rod was Sn-plated copper. Subsequently, coal tar was applied around the connection portion between the rod portion and the flange portion, and then left for 30 minutes. Next, the rod portion was inserted through the seal member A so that the seal member (O-ring, material: EPDM, inner diameter: 5 mm, wire diameter: 1.8 mm) was in contact with the flange portion. At this time, the inner peripheral side of the seal member was in contact with the rod portion.
Adhesive A (manufactured by Henkel, trade name: MS9360), which is different from a silicone adhesive, was applied to the exposed portion of the O-ring.
A lid member (material: Asahi Kasei Corporation, trade name: Zylon TZ100) having two through holes was prepared. After applying a primer (Cemedine Co., Ltd., product name: PP-7F) around the through holes on one side of the lid member, apply primer to each through hole of the lid member within 1 minute until the O-ring comes into contact with the lid member. The rod part of the conductive rod was inserted. At this time, the above-mentioned adhesive A was brought into contact with the lid member and the flange on the outer peripheral side of the O-ring to temporarily fix it.
On the opposite side of the flange to the lid member, adhesive B (epoxy adhesive, manufactured by Henkel, product name: E- 90FL) was applied.
A nut (M6, material: Ni-plated copper) was fastened to the rod portion on the opposite side of the flange portion to the lid member. The nut tightening torque was 1.0 N·m.
By leaving it for one day, a structure having a conductive rod inserted into the through hole of the lid member was obtained.

<Preparation of battery>
A rectangular (56 mm x 67 mm) electrode plate (positive electrode plate (current collector: foamed nickel, electrode layer: nickel compound) with an ear at the end of one side and an electrode plate (negative electrode plate (current collector: Sn-plated copper) , electrode layer: zinc compound) was prepared.Each electrode plate was housed in a bag-shaped separator (rectangular shape, approximately 58 mm x 70 mm, material: polypropylene) so that the ears were exposed from the separator.

At one end of one side of the laminate, an ear group is formed in which the ears of the positive electrode plates overlap in the stacking direction, and at the other end of the side of the laminate, an ear group is formed in which the ears of the negative electrode plates overlap in the stacking direction. A laminate was obtained by alternately stacking 11 positive electrode plates and 12 negative electrode plates as shown in FIG. By winding the center of the laminate with tape along a pair of opposing sides of the laminate, and wrapping the center of the laminate with tape along the other pair of opposing sides of the laminate, the positive electrode plate and the negative electrode are separated. The plates were fixed to obtain an electrode plate group.

A terminal having a through hole penetrating in a direction perpendicular to the longitudinal direction of the rod portion of the above-described structure was attached to each flange portion of the above-described structure. Next, the ear group of the positive electrode plate and one of the above-mentioned terminals were fixed with bolts and nuts with a spring washer and a flat washer interposed therebetween. Further, the ear group of the negative electrode plate and the other terminal of the above-described terminal were fixed with bolts and nuts with a spring washer and a flat washer interposed therebetween. The bolt tightening torque was 2.5 N·m on the positive electrode side and 1 N·m on the negative electrode side. The lid member of the structure to which the electrode group was connected was joined to the battery case. After injecting air into the container from the liquid injection port, the container was immersed in a water tank at 50°C. The pressure was applied to 0.4 MPa, and it was confirmed that there was no air leakage from the welded part for 1.5 minutes.

Electrolyte solution (potassium hydroxide aqueous solution) was injected into the battery container through the injection port. The injection port was sealed by inserting an O-ring into the injection port and attaching a control valve to the injection port. A battery was produced by repeating charging and discharging, then aging at a constant temperature for 7 days, and then chemically forming the battery by repeating charging and discharging under predetermined conditions.

<Leak test>
A cover was installed on the control valve of the battery mentioned above to prevent the influence of leakage of exhaust fluid. After applying a small amount of water to the terminal, it was confirmed using pH test paper that no electrolyte was attached to the surface of the terminal.

After placing the battery in a constant temperature and humidity chamber, it was left at 60° C. and 75% RH for one week. After the battery was taken out from the constant temperature and humidity chamber, it was cooled at room temperature for 1 hour. Use pH test paper to check whether electrolyte is attached to the surface of the terminal. If no electrolyte is found, leave it in a constant temperature and humidity chamber at 60°C and 75% RH for one week, then check the pH. The above-mentioned operation of checking the adhesion of the electrolyte using the test paper was repeated.

In the battery of the comparative example, electrolyte adhesion was confirmed on the terminal (negative electrode side terminal) after a two-week test, whereas in the battery of the example, electrolyte was only observed on the terminal (negative electrode side terminal) after an eight-week test. Adhesion of electrolyte was confirmed in

DESCRIPTION OF SYMBOLS 10... Lid member, 10a... Through hole, 20... Conductive rod, 22... Bar part, 22a... Threaded part, 22b... Cylindrical part, 24... Flange part, 24a... Screw hole, 30... Fastening member, 30a... Inner peripheral part , 40... Seal member (first seal member), 50... Seal member (second seal member), 60... First adhesive, 70... Second adhesive, 100... Battery, 110, 110a... Structure Body, 120... Housing, 130... Electrode group (electrode).

Claims (5)

A battery comprising a structure, a casing, and an electrode and an electrolyte housed in the casing,
A nickel-zinc battery, a zinc-air battery or a silver-zinc battery,
The structure is
a lid member having a through hole formed therein and attached to the housing ;
a conductive rod having a rod portion inserted into the through hole and a flange portion not inserted into the through hole;
a fastening member that is disposed on the opposite side of the flange portion to the lid member and fastens the conductive rod to the lid member by drawing the flange portion toward the lid member;
an annular first sealing member through which the rod part is inserted and disposed between the flange part and the lid member;
a first adhesive that contacts the first sealing member between the lid member and the flange, and a second adhesive that is disposed between the inner circumference of the fastening member and the rod; has been granted,
the first adhesive and the second adhesive contain a silicone compound,
A battery , wherein the electrolytic solution contains potassium hydroxide or sodium hydroxide . The battery according to claim 1, further comprising a second annular seal member disposed between the fastening member and the lid member. The rod portion has a threaded portion in which a threaded groove is formed;
The battery according to claim 1 or 2, wherein the fastening member is a nut tightened onto the threaded portion. The battery according to claim 3, wherein the threaded portion is not provided at a position corresponding to the first seal member in the rod portion. The battery according to any one of claims 1 to 4 , wherein the flange portion is located outside the casing.

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