JP3744788B2 - Sealed battery and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sealed battery in which an opening of an outer can is crimped and a sealing body is hermetically fixed.
[0002]
[Prior art]
A sealed battery is manufactured by filling an electrode body and an electrolyte into a cylindrical outer can that closes the bottom, and then sealingly closing the opening of the outer can with a sealing body. The structure in which the outer can is sealed with the sealing body is airtightly sealed by sandwiching a rubber elastic body gasket between the sealing body and the outer can by caulking. As shown in FIG. 1, the conventional battery having this structure is manufactured by the following steps.
[0003]
(1) The electrode body 1 in which the positive electrode plate 1A and the negative electrode plate 1B are laminated via the separator 1C and wound is inserted into the outer can 2 whose bottom is closed. After putting the electrode body 1, the insulating separator 9 is put on the upper surface of the electrode body 1.
(2) Groove the outer can 2 from the outer peripheral surface to provide the peripheral wall 7. The peripheral wall 7 is provided at the boundary between the electrode body 1 and the sealing body 3 and serves as a stopper that prevents the sealing body 3 from being pushed into the outer can 2.
(3) An electrolytic solution is injected into the outer can 2 and penetrates into the electrode body 1.
(4) The lead 8 connected to the electrode body 1 is spot-welded and connected to the sealing body 3.
(5) After the sealing body 3 is set in the opening of the outer can 2, the opening edge of the outer can 2 is bent inward into an L shape, and the sealing body 3 is formed by the L-shaped bent portion 6 and the peripheral wall 7. Clamp and fix. In this state, the sealing body 3 is clamped via the gasket 4. The gasket 4 hermetically fixes the sealing body 3 and insulates the sealing body 3 from the outer can 2. Therefore, an insulating material that is a rubber-like elastic body is used for the gasket 4.
(6) Finally, the L-shaped bent portion 6 is pressed from above, and the gasket 4 is securely sandwiched between the L-shaped bent portion 6 and the peripheral wall 7 so as to be in an airtight state.
[0004]
[Problems to be solved by the invention]
Batteries in which the sealing body is fixed to the outer can by caulking are manufactured by the above process, but in recent years, demands for reducing the weight of the battery and increasing the capacity are increasing. In order to realize this, it is required to make the outer can as thin as possible. However, when the outer can is made of a thin metal plate, the L-shaped bent portion sandwiching the sealing body is thinned, the strength is lowered, and the airtightness is lowered to cause liquid leakage.
[0005]
In order to eliminate this drawback, a battery in which the outer can is made thicker along the opening edge has been developed (JP-A-4-296444, JP-A-2000-30673). Although the battery having this structure has the feature that the strength of the opening can be improved, it is very difficult to manufacture the outer can, and further, the manufacturing cost is considerably increased. Further, this structure also has the following adverse effects (1) and (2) in the actual manufacturing process.
(1) As shown in FIG. 2, when the opening of the outer can 2 is thickened so as to protrude to the inside of the case, when the electrode body 1 is inserted into the outer can 2, the portion protruding inward becomes an obstacle. Therefore, it becomes impossible to insert a thick electrode body. For this reason, the capacity of the battery cannot be increased even if the outer can is made thinner.
(2) As shown in FIG. 3, when the opening of the outer can 2 is thickened so as to protrude to the outside of the case, it is arranged on the conveyor 11 in order to supply the outer can 2 side by side in the assembly process. In addition, there is a drawback that the adjacent outer cans 2 come into contact with each other at a portion protruding thickly outside, and the opening is inclined. In this state, a large number of outer cans are arranged on the conveyor and cannot be normally transferred.
[0006]
A battery shown in FIG. 4 has been developed as a sealed battery that eliminates such drawbacks (Japanese Patent Laid-Open No. 9-92236). The battery shown in this figure has a two-ply structure by folding the opening edge of the outer can 2 outward. However, since this structure bends the same material as the outer can 2, there is a limit in strength enhancement. To make matters worse, when the opening edge of the outer can 2 is bent into this shape, the metal material is broken, resulting in a defective product and a reduced yield.
[0007]
The present invention has been developed for the purpose of solving such drawbacks. An important object of the present invention is to provide a sealed battery in which an outer can can fix a sealing body with sufficient strength and a method for manufacturing the sealed battery.
[0008]
[Means for Solving the Problems]
The sealed battery of the present invention includes an electrode body 1 in which a separator 1C is disposed between a positive electrode plate 1A and a negative electrode plate 1B, an outer can 2 containing the electrode body 1, and an outer can 2 And a sealing body 3 that is airtightly fixed to the opening by caulking. Further, the sealed battery fixes a reinforcing member 5 that is a separate component from the outer can 2 along the opening of the outer can 2.
[0009]
In the sealed battery which is a cylindrical battery, the reinforcing member 5 can be a circular ring. Further, in the sealed battery which is a square battery, the reinforcing member 5 can be a square ring.
[0010]
Further, in the sealed battery of the present invention, the reinforcing member 5 that reinforces the opening of the outer can is fixed to the upper surface of the L-shaped bent portion bent inward by caulking .
[0011]
Further, in the sealed battery of the present invention, the reinforcing member 5 can be fixed by inserting the outer can opening edge into the groove 5A of the reinforcing member 5 by using the cross-sectional shape of the reinforcing member 5 as a groove shape. A sealed battery having a cross-sectional shape of the reinforcing member 5 having a groove shape is formed thinly on the opening edge of the outer can 2 and provided with a fitting portion 2a, and the fitting portion 2a is fitted into the groove 5A of the reinforcing member 5. Can do. In this sealed battery, the outer dimension of the groove width of the reinforcing member 5 can be made the same as the thickness of the outer can 2. Further, the groove-type reinforcing member 5 is inserted into the groove 5A with the opening edge of the outer can 2, and the reinforcing member 5 is fixed to the outer can by sandwiching the opening edge with the groove 5A. The can 2 can be welded and fixed.
[0012]
Furthermore, the sealed battery according to the present invention can fix the reinforcing member 5 by fitting the opening edge of the outer can 2 into the cutout portion 5B of the reinforcing member 5 with the L-shaped cross section of the reinforcing member 5. it can.
[0013]
The method for manufacturing a sealed battery according to the present invention is such that the electrode body 1 in which the separator 1C is disposed between the positive electrode plate 1A and the negative electrode plate 1B, and the electrolytic solution are placed in the outer can 2, and then the outer can 2 The opening 3 is crimped to fix the sealing body 3 in an airtight manner. Furthermore, the manufacturing method of a sealed battery fixes and reinforces the reinforcing member 5 along the opening of the crimped outer can 2.
[0014]
The reinforcing member 5 can be fixed by welding the upper surface of the L-shaped bent portion 6 after bending the opening of the outer can 2 into the L-shaped bent portion 6.
[0015]
Furthermore, in the method for manufacturing a sealed battery according to the present invention, the reinforcing member 5 is connected to the opening edge of the outer can 2 in which the electrode body 1 is placed, and the outer can 2 to which the reinforcing member 5 is connected is caulked and sealed. 3 can be fixed.
[0016]
As the reinforcing member 5, a groove-type reinforcing member 5 having a cross-sectional shape of a groove shape is used, and the opening edge of the outer can 2 can be inserted into the groove 5A of the reinforcing member 5 and crimped. Furthermore, the reinforcing member 5 having an L-shaped cross-sectional shape can be used, and the opening edge of the outer can 2 can be fitted into the notch portion 5B of the reinforcing member 5 and crimped.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. However, the examples shown below exemplify the sealed battery and its manufacturing method for embodying the technical idea of the present invention, and the present invention does not specify the battery and its manufacturing method below.
[0018]
Further, in this specification, in order to facilitate understanding of the scope of claims, the numbers corresponding to the members shown in the examples are referred to as “the scope of claims” and “the means for solving the problems”. It is added to the member shown by. However, the members shown in the claims are not limited to the members in the embodiments.
[0019]
The battery shown in FIGS. 5 to 7 includes an electrode body 1 in which a separator 1C is disposed between a positive electrode plate 1A and a negative electrode plate 1B, an outer can 2 containing the electrode body 1, and an outer casing. And a sealing body 3 that hermetically closes an opening of the can 2 via a gasket 4. In this battery, the outer can 2 is crimped and the sealing body 3 is fixed. The battery in this figure is a secondary battery such as a nickel-hydrogen battery, a nickel-cadmium battery, or a lithium ion secondary battery.
[0020]
When the battery is a nickel-hydrogen battery, the negative electrode plate is an electrode plate coated with an active material mainly composed of a hydrogen storage alloy, and the positive electrode plate is a nickel core with slurry water. An electrode plate rolled with an active material mainly composed of nickel oxide is used. A positive electrode plate and a negative electrode plate are laminated via a separator made of polypropylene nonwoven fabric and wound to obtain an electrode body. A potassium hydroxide electrolyte is used as the electrolyte.
[0021]
When the battery is a nickel-cadmium battery, a strip-shaped non-sintered negative electrode plate in which a paste active material mainly composed of cadmium oxide is filled in the electrode plate core is used for the negative electrode plate, and nickel is used for the positive electrode plate. An electrode plate rolled by impregnating an active material mainly composed of slurry-like nickel hydroxide is used. However, the electrode plate can also be manufactured by a sintered manufacturing method. This electrode plate is made by filling cadmium into a nickel porous sintered substrate obtained by sintering a perforated thin steel plate coated with a slurry containing an organic thickener in a reducing atmosphere by chemical or electrolytic impregnation. A plate or a positive electrode plate filled with nickel. A positive electrode plate and a negative electrode plate are laminated via a separator made of polypropylene nonwoven fabric and wound to obtain an electrode body. An electrolytic solution containing potassium hydroxide as a main component is used as the electrolytic solution.
[0022]
When the battery is a lithium ion secondary battery, the positive electrode plate is a positive electrode active material that is a lithium-containing composite oxide, for example, an electrode plate that is rolled by applying a positive electrode slurry mainly composed of LiCoO ₂ to the core. For the negative electrode plate, a negative electrode active material that is a carbonaceous material that occludes / releases lithium ions, for example, an electrode plate that is rolled by applying a negative electrode slurry mainly composed of natural graphite powder to the core is used. The positive electrode plate and the negative electrode plate are laminated through a separator that is a microporous film made of polyethylene and wound to obtain an electrode body. As the electrolytic solution, a non-aqueous aprotic organic solvent in which a lithium salt is dissolved as an electrolyte is used.
[0023]
The battery shown in the figure is wound around a positive electrode plate 1A and a negative electrode plate 1B that are stacked on each other via a separator 1C. The spiral electrode body 1 is inserted into a cylindrical outer can 2. The spiral electrode body can be pressed from both sides to be deformed into an elliptical shape and inserted into an elliptical or rectangular outer can. Furthermore, the electrode body to be inserted into the rectangular tube-shaped outer can is manufactured by laminating a plurality of positive plates and negative plates that are cut into a plate shape, and alternately laminating electrode plates having different polarities via separators. You can also.
[0024]
The outer can 2 is manufactured by pressing a metal plate into a cylindrical shape with a closed bottom. As the metal plate used for the outer can 2, a metal plate on an iron surface, aluminum, an aluminum alloy, a clad material in which a plurality of metals are laminated, or the like is used. Nickel is used for metal plating.
[0025]
The outer can 2 has a reinforcing member 5 that is a separate component from the outer can 2 fixed along the opening. Since the reinforcing member 5 is fixed along the opening of the outer can 2, the reinforcing member of the cylindrical battery is a circular ring, and the reinforcing member of the rectangular battery is a square ring. However, the reinforcing member of the cylindrical battery does not necessarily need to be circular, and may be a shape combining a plurality of straight lines, for example, a regular polygon. The polygonal reinforcing member can be shaped along a more circular opening by increasing the number of sides.
[0026]
Furthermore, the reinforcing member is not necessarily required to have a ring shape connected in an annular shape. Although not shown, the reinforcing member may have a shape in which a part of the ring is cut out. Further, in the cylindrical battery, the reinforcing ring may have a shape in which an arc is divided as shown in FIG. In the cylindrical battery shown in this figure, arc-shaped reinforcing members 5 which are three parts are fixed along the opening of the outer can 2. However, the reinforcing member having a shape in which the arc is divided may be two, or four or more parts. Furthermore, in the prismatic battery, although not shown, the reinforcing member can be a U-shape, an L-shape, or a shape in which straight lines are divided, and a plurality of parts can be fixed along the opening of the outer can. .
[0027]
6 and 7 has a reinforcing member 5 welded and fixed to the upper surface of an L-shaped bent portion 6 bent inward by caulking. The reinforcing member 5 is formed by crimping the outer can 2 to fix the sealing body 3 and then fixing the reinforcing member 5 to the upper surface of the L-shaped bent portion 6 by resistance welding. The reinforcing member 5 can be fixed with an adhesive without being welded. The reinforcing member 5 fixed here has an inner shape substantially equal to or slightly smaller than the inner peripheral shape of the L-shaped bent portion 6, and the outer shape is substantially equal to the outer shape of the outer can 2. Be slightly smaller than. The reinforcing member 5 that is welded and fixed to the L-shaped bent portion 6 is a metal plate that is thicker than the outer can 2 or substantially equal in thickness to the outer can 2. Any metal plate that can be resistance welded can be used. For example, as with the outer can 2, an iron plate whose surface is metal-plated is used. Further, the reinforcing member 5 can be made thin and strong when a metal plate having a higher strength than that of the outer can 2 is used, such as high-tensile steel. The reinforcing member 5 bonded and fixed to the L-shaped bent portion 6 is not necessarily a metal plate, and for example, plastic reinforced with glass fiber or carbon fiber can be used. The sealed battery having the above structure has a feature that a sealing member can be made to have a strong structure by fixing a reinforcing member to an L-shaped bent part of a battery manufactured by the same method as the conventional one.
[0028]
In the sealed battery shown in FIGS. 9 to 11, the reinforcing member 5 having a cross-sectional shape of a groove shape is fixed to the opening edge of the outer can 2. The reinforcing member 5 is fixed to the outer can 2 by inserting an opening edge into the groove 5A. The reinforcing member 5 is fixed to the outer can 2 with the opening edge sandwiched between the grooves 5A, or is fixed to the outer can 2 by resistance welding the inner surface of the groove 5A to the surface of the opening edge. However, the reinforcing member 5 having this structure cannot be removed from the opening edge when the opening edge is bent into the groove 5A without being sandwiched or welded. Therefore, the reinforcing member 5 can be fixed to the opening edge by bending without necessarily welding or bonding the opening edge.
[0029]
The reinforcing member 5 having this structure is connected to the opening edge in the previous step of bending the L-shaped portion instead of being mounted after the opening portion is bent into the L-shaped shape as in the battery of FIG. . FIG. 11 shows a state in which the reinforcing member 5 is set at the opening edge. As shown in this figure, after the sealing body 3 is set in the opening, it is attached to the opening edge in a pre-process for bending the opening edge. When the opening edge of the outer can 2 is put into the groove 5 </ b> A of the reinforcing member 5, the reinforcing member 5 is put between the gasket 4 and the outer can 2. That is, the gasket 4 is disposed inside the reinforcing member 5. After setting the reinforcing member 5 in this state, the opening of the outer can 2 is bent into an L shape and crimped. The reinforcing member 5 is bent inward together with the opening of the outer can 2 by caulking. Therefore, the crimped L-shaped bent portion 6 is in a state where the reinforcing member 5 is fixed to the opening edge, and is firmly reinforced by the reinforcing member 5.
[0030]
Further, in the sealed battery shown in FIGS. 12 to 14, the opening edge of the outer can 2 is thinned to provide the fitting portion 2a, and the fitting portion 2a is fitted into the groove 5A of the reinforcing member 5, so that the groove of the reinforcing member 5 is provided. The outer width is the same as the thickness of the outer can 2. With this structure, the thickness of the opening can be made the same as that of the other portions with the reinforcing member 5 fixed. For this reason, the electrode body 1 can be put in the outer can 2 in a state where the reinforcing member 5 is attached to the opening edge of the outer can 2. This is because the reinforcing member 5 does not project the opening of the outer can 2 inward. Therefore, the reinforcing member 5 having this structure can be used at any time before the opening of the outer can 2 is bent into an L shape, for example, before the outer can 2 is manufactured and the electrode body 1 is inserted. It can also be attached to.
[0031]
The total thickness of the reinforcing member 5 having this structure is limited to the thickness of the outer can 2. Therefore, the opening of the outer can 2 is reinforced by manufacturing it with a metal stronger than the outer can 2, for example, high-tensile steel. Further, as shown in FIG. 15, the groove-shaped reinforcing member 5 has a structure in which the inner surface of the outer can can be flush with the inner surface of the outer can 2 while being attached to the opening edge of the outer can 2. 2 opening edges can be reinforced. The outer can 2 is provided with a notch 2b so that a step is formed on the inner surface along the opening edge. The reinforcing member 5 is configured such that a portion attached to the inside of the outer can 2 is fitted into the notch 2 b so as to be flush with the inner surface of the outer can 2.
[0032]
The reinforcing member 5 having this structure can also be fixed to the outer can 2 by sandwiching the opening edge with the groove 5A, or can be fixed to the outer can 2 by resistance welding the inner surface of the groove 5A to the surface of the opening edge. However, the reinforcing member 5 having this structure can also be fixed so as not to come out of the opening edge without being sandwiched or welded. Therefore, the reinforcing member 5 can also be fixed to the opening edge by bending without necessarily welding or bonding the opening edge.
[0033]
Further, in the sealed battery shown in FIGS. 16 and 17, the reinforcing member 5 having an L-shaped cross section is fixed to the opening edge of the outer can 2. The reinforcing member 5 is bent in an L shape, and is fixed to the outer can 2 by fitting an opening edge into a notch 5B formed inside the L shape. The sealed battery shown in FIG. 16 has a notch 5B formed on the upper side of the reinforcing member 5 in the figure, and the inner surface of the opening is in close contact with the notch 5B. The sealed battery shown in FIG. 17 has a notch 5B formed on the lower side of the reinforcing member 5 in the figure, and is fixed in a state where the outer surface of the opening is in close contact with the notch 5B. In the sealed battery shown in these drawings, for example, the reinforcing member 5 is connected to the opening edge in the previous step of bending the opening into an L shape.
[0034]
FIG. 18 shows a state in which the reinforcing member 5 shown in FIG. 16 is set at the opening edge of the outer can 2. The reinforcing member 5 shown in this figure is provided with a bent portion 5 </ b> C by bending the upper end of the cylindrical ring outward, and is inserted inside the opening of the outer can 2. When the reinforcing member 5 having this structure is inserted into the opening portion of the outer can 2, the bending portion 5 </ b> C can be used as a positioning convex portion until it comes into contact with the opening edge. The reinforcing member 5 is inserted between the gasket 4 and the outer can 2. The reinforcing member 5 is fixed to the outer can 2 by resistance welding or bonding the outer surface to the inner surface of the opening. However, the reinforcing member 5 having this structure is not necessarily fixed to the opening edge because it is not removed from the opening edge when the opening is bent after being attached to the opening edge. The outer can 2 fitted with the reinforcing member 5 is crimped by bending the opening into an L shape. The reinforcing member 5 is bent inward together with the opening of the outer can 2 by caulking. The crimped L-shaped bent portion 6 is in a state in which the reinforcing member 5 is fixed to the opening edge, and is firmly reinforced by the reinforcing member 5.
[0035]
FIG. 19 shows a state in which the reinforcing member 5 shown in FIG. 17 is set at the opening edge of the outer can 2. The reinforcing member 5 shown in this figure has an upper end bent inward to provide a bent portion 5 </ b> C, and is attached to the outside of the opening of the outer can 2. When the reinforcing member 5 having this structure is also attached to the opening of the outer can 2, the bent portion 5 </ b> C can be used as a positioning convex portion until it contacts the opening edge. Since the reinforcing member 5 is mounted outside the opening, the reinforcing member 5 does not protrude inside the opening of the outer can 2. Therefore, the reinforcing member 5 is attached to the outer can 2 at any time before the opening of the outer can 2 is bent into an L shape, for example, before the outer can 2 is manufactured and the electrode body 1 is inserted. You can also The reinforcing member 5 is fixed to the outer can 2 by resistance welding or bonding the outer surface to the inner surface of the opening. The outer can 2 fitted with the reinforcing member 5 is crimped by bending the opening into an L shape. The reinforcing member 5 is bent inward together with the opening of the outer can 2 by caulking.
[0036]
However, as shown in FIG. 20, the sealed battery shown in FIG. 17 can be attached with the reinforcing member 5 after the opening of the outer can 2 is bent in an L shape. Since the reinforcing member 5 has the inner peripheral bent portion 5 </ b> C protruding downward, the bent portion 5 </ b> C can be disposed along the inner peripheral edge of the L-shaped bent portion 6. That is, the reinforcing member 5 has a feature that it can be accurately disposed at a predetermined position on the upper surface of the L-shaped bent portion 6 with the bent portion 5C as a positioning convex portion. The protruding amount and width of the bent portion 5C are designed to be optimum values so that the tip of the bent portion 5C does not contact the sealing body 3 in a state where the reinforcing member 5 is fixed. The reinforcing member 5 is fixed by welding or bonding with an adhesive.
[0037]
The gasket 4 is sandwiched between the outer can 2 and the sealing body 3 in order to insulate and connect the outer can 2 and the sealing body 3 in an airtight manner. The outer can 2 is manufactured by molding a rubber-like elastic body such as plastic that can be elastically deformed, synthetic rubber, or nylon. The gasket 4 is formed into a U-shaped cross-sectional shape, and a fitting groove 10 for fitting the outer peripheral edge of the sealing body 3 is provided on the inner peripheral surface, and the sealing body 3 is inserted therein. . Further, since the gasket 4 is disposed on the inner surface of the outer can 2, the outer shape is formed to be equal to or slightly smaller than the inner shape of the outer can 2.
[0038]
The sealing body 3 is manufactured by pressing a metal plate. The outer shape of the sealing body 3 is slightly smaller than the inner shape of the outer can 2 and is shaped to be fixed to the outer can 2 via the gasket 4. The sealing body 3 is fixed by spot welding two metal plates. The sealing body 3 can also incorporate a safety valve between two metal plates. The sealing body incorporating the safety valve opens when the internal pressure of the outer can becomes higher than the set pressure, and prevents the outer can from being destroyed due to an abnormally high internal pressure of the outer can. The safety valve built in the sealing body is, for example, a rubber-like elastic body placed between two metal plates, or a rubber plate, a plate material, and a spring arranged between two metal plates, Can be elastically pressed against the valve opening by a spring.
[0039]
【The invention's effect】
The sealed battery and the manufacturing method thereof according to the present invention have an advantage that the outer can can fix the sealing body with sufficient strength. This is because the sealed battery of the present invention and the manufacturing method thereof fix a reinforcing member that is a separate part from the outer can along the opening of the outer can. Since this structure can reinforce the crimped portion of the outer can with the reinforcing member, the strength of this portion can be increased and the sealing body can be fixed securely. Therefore, the sealed battery of the present invention and the manufacturing method thereof can make the outer can as thin as possible and can firmly fix the sealing body to the outer can by caulking, while realizing reduction in battery weight and increase in capacity. , Harmful effects such as a decrease in airtightness and liquid leakage can be minimized.
[Brief description of the drawings]
FIG. 1 is a sectional view showing a conventional battery manufacturing process. FIG. 2 is a sectional view showing an example of a conventional battery outer can. FIG. 3 is a sectional view showing another example of a conventional battery outer can. 4 is a cross-sectional view of another conventional battery. FIG. 5 is a cross-sectional view of a sealed battery according to an embodiment of the present invention. FIG. 6 is a perspective view of the sealed battery shown in FIG. 5. FIG. 7 is an exploded view of the sealed battery shown in FIG. FIG. 8 is a sectional view of a sealed battery according to another embodiment of the present invention. FIG. 9 is a sectional view of a sealed battery according to another embodiment of the present invention. FIG. 10 is a perspective view of the sealed battery shown in FIG. 11 is an exploded cross-sectional view showing a manufacturing process of the sealed battery shown in FIG. 9. FIG. 12 is a cross-sectional view of the sealed battery according to another embodiment of the present invention. FIG. 13 is a perspective view of the sealed battery shown in FIG. FIG. 15 is an exploded cross-sectional view showing the manufacturing process of the sealed battery shown in FIG. 12. FIG. 15 is an enlarged cross-sectional view of the main part of the sealed battery according to another embodiment of the present invention. FIG. 17 is an enlarged cross-sectional view of a main part of a sealed battery according to another embodiment of the present invention. FIG. 18 is an enlarged cross-sectional view of a main part of the sealed battery according to another embodiment of the present invention. FIG. 19 is an exploded sectional view showing a manufacturing process of the sealed battery shown in FIG. 17. FIG. 20 is an exploded sectional view of a sealed battery according to another embodiment of the present invention.
DESCRIPTION OF SYMBOLS 1 ... Electrode body 1A ... Positive electrode plate 1B ... Negative electrode plate
DESCRIPTION OF SYMBOLS 1C ... Separator 2 ... Exterior can 2a ... Insertion part 2b ... Notch part 3 ... Sealing body 4 ... Gasket 5 ... Reinforcement member 5A ... Groove 5B ... Notch part
5C ... bent portion 6 ... L-shaped bent portion 7 ... peripheral wall 8 ... lead 9 ... insulating separator 10 ... fitting groove 11 ... conveyor

Claims (11)

An electrode body (1) in which a separator (1C) is disposed between a positive electrode plate (1A) and a negative electrode plate (1B), and an outer can (2) containing the electrode body (1), A cylindrical battery comprising a sealing body (3) that is airtightly fixed by caulking to the opening of the outer can (2),
Along the upper surface of the L-shaped bent portion (6) of the opening of the outer can (2) bent inward by caulking, the opening of the outer can, which is a separate part from the outer can (2), is reinforced The reinforcing member (5) is fixed, and the reinforcing member is a circular ring whose inner shape is equal to the inner peripheral shape of the L-shaped bent portion (6) and whose outer shape is equal to the outer shape of the outer can (2). A sealed battery characterized by that. An electrode body (1) in which a separator (1C) is disposed between a positive electrode plate (1A) and a negative electrode plate (1B), and an outer can (2) containing the electrode body (1) , A rectangular battery comprising a sealing body (3) that is airtightly fixed by caulking to the opening of the outer can (2) ,
Along the upper surface of the L-shaped bent portion (6) of the opening of the outer can (2) bent inward by caulking, the opening of the outer can, which is a separate part from the outer can (2) , is reinforced A sealed battery in which a reinforcing member (5) to be fixed is fixed and the reinforcing member is a square ring . An electrode body (1) in which a separator (1C) is disposed between a positive electrode plate (1A) and a negative electrode plate (1B), and an outer can (2) containing the electrode body (1) , A battery comprising a sealing body (3) that is airtightly fixed by caulking to the opening of the outer can (2) ,
Along the upper surface of the L-shaped bent portion (6) of the opening of the outer can (2) bent inward by caulking, the opening of the outer can, which is a separate part from the outer can (2) , is reinforced A sealed battery , wherein a reinforcing member (5) to be fixed is fixed, and the reinforcing member is fixed by welding . An electrode body (1) in which a separator (1C) is disposed between a positive electrode plate (1A) and a negative electrode plate (1B), and an outer can (2) containing the electrode body (1) , A battery comprising a sealing body (3) that is airtightly fixed by caulking to the opening of the outer can (2) ,
Along the upper surface of the L-shaped bent portion (6) of the opening of the outer can (2) bent inward by caulking, the opening of the outer can, which is a separate part from the outer can (2) , is reinforced The reinforcing member (5) is fixed, and the reinforcing member (5) has a cross-sectional shape of a groove, and the opening edge of the outer can (2) is inserted into the groove (5A) of the reinforcing member (5). And the reinforcing member (5) is fixed. A thin insertion portion (2a) is provided at the opening edge of the outer can (2), and the insertion portion (2a) is inserted into the groove (5A) of the reinforcing member (5), so that the reinforcing member (5 5) The sealed battery according to claim 4 , wherein the outer dimension of the groove width is the same as the thickness of the outer can (2). Insert the groove-shaped reinforcing member (5) into the opening edge of the outer can (2), and sandwich the opening edge with the groove (5A) of the reinforcing member (5) to attach the reinforcing member (5) to the outer can (2). The sealed battery according to claim 4 , which is fixed to the battery. The sealed battery according to claim 4 , wherein the groove-shaped reinforcing member (5) is fitted into the opening edge of the outer can (2), and the reinforcing member (5) is fixed to the outer can (2) by welding. An electrode body (1) in which a separator (1C) is disposed between a positive electrode plate (1A) and a negative electrode plate (1B), and an outer can (2) containing the electrode body (1) , A battery comprising a sealing body (3) that is airtightly fixed by caulking to the opening of the outer can (2) ,
L-shaped bent portion of the opening portion of the caulking bent the outer can inside the machining (2) I along the upper surface (6), the opening of the outer can is a separate part from the outer can (2) While fixing the reinforcing member (5) to be reinforced ,
Said reinforcement member (5) has a cross-sectional shape and L-shape, the reinforcing member (5) of the notch (5B) to fit the opening edge of the outer can (2) engaged thereby in the reinforcing member (5) A sealed battery characterized by being fixed. After putting the electrode body (1) in which the separator (1C) is disposed between the positive electrode plate (1A) and the negative electrode plate (1B) and the electrolyte into the outer can (2) , the outer can (2 In the manufacturing method of the battery for crimping the opening of the sealing body (3) and hermetically fixing the sealing body (3) ,
The L-shaped bent portion by bending an opening of the outer can (2) and (6), a reinforcing member for reinforcing the opening of the outer can on the upper surface of the L-shaped bent portion (6) (5) A method of manufacturing a sealed battery that is fixed by welding. After putting the electrode body (1) in which the separator (1C) is disposed between the positive electrode plate (1A) and the negative electrode plate (1B) and the electrolyte into the outer can (2), the outer can (2 In the manufacturing method of the battery for crimping the opening of the sealing body (3) and hermetically fixing the sealing body (3),
Using the groove-shaped reinforcing member (5) having a cross-sectional shape as a groove shape for the reinforcing member (5), putting the opening edge of the outer can (2) in the groove (5A) of this reinforcing member (5), outer can have the electrode body (1) connecting the channel-shaped reinforcing member for reinforcing the opening of the outer can (5) the opening edge of the outer can (2) containing the, connecting the reinforcing members (5) ( 2. A method for producing a sealed battery, wherein the sealing body (3) is fixed by caulking to 2) . After putting the electrode body (1) in which the separator (1C) is disposed between the positive electrode plate (1A) and the negative electrode plate (1B) and the electrolyte into the outer can (2) , the outer can (2 In the manufacturing method of the battery for crimping the opening of the sealing body (3) and hermetically fixing the sealing body (3) ,
The use of reinforcing members to the cross-sectional shape and L-shape reinforcing member (5) (5), the opening edge of the outer can to notch can be on the inner side (5B) of the reinforcing member (5) (2) and fitting, the electrode body (1) connecting the reinforcing member (5) for reinforcing the opening of the outer can with the opening edge of the outer can containing the (2), and connecting said reinforcing member (5) A method for manufacturing a sealed battery in which an outer can (2) is crimped to fix a sealing body (3) .

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