WO2013012084A1 - 円筒形電池 - Google Patents
円筒形電池 Download PDFInfo
- Publication number
- WO2013012084A1 WO2013012084A1 PCT/JP2012/068521 JP2012068521W WO2013012084A1 WO 2013012084 A1 WO2013012084 A1 WO 2013012084A1 JP 2012068521 W JP2012068521 W JP 2012068521W WO 2013012084 A1 WO2013012084 A1 WO 2013012084A1
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- WO
- WIPO (PCT)
- Prior art keywords
- battery case
- electrode
- spacer
- electrode group
- contact
- Prior art date
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0468—Compression means for stacks of electrodes and separators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/102—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure
- H01M50/107—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/463—Separators, membranes or diaphragms characterised by their shape
- H01M50/466—U-shaped, bag-shaped or folded
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0422—Cells or battery with cylindrical casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/24—Alkaline accumulators
- H01M10/28—Construction or manufacture
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to a cylindrical battery.
- a cylindrical electrode is formed by winding a belt-like positive electrode plate and a negative electrode plate in a spiral shape through a belt-like separator around a cylindrical battery case.
- the present invention has been made to solve the above-described problems, and provides a cylindrical battery that does not require the winding process of the electrode group and does not need to consider the winding deviation of the electrode group.
- the main objective is to prevent the active material from falling off the electrode plate to prevent the deterioration of the charge / discharge performance.
- the cylindrical battery according to the present invention includes a cylindrical battery case, a positive electrode, a negative electrode, and a separator, which are disposed in the battery case, and a pair of outer surfaces facing each other are planar electrodes. And a spacer for fixing the electrode group, wherein the spacer is provided between an inner peripheral surface of the battery case and an outer surface forming a planar shape of the electrode group. To do.
- the electrode group which consists of a positive electrode, a negative electrode, and a separator and makes a pair of opposing outer surfaces form a planar shape is accommodated in the battery case, it accompanies winding deviation and winding deviation of the electrode group.
- a battery free from various problems can be provided.
- it since it is a cylindrical battery case, it can be strengthened in strength against an increase in internal pressure.
- the electrode group in which a pair of opposed outer surfaces facing each other, such as a substantially rectangular parallelepiped shape, is planar with respect to the cylindrical battery case is disposed, the space in the battery case can be increased, and the battery internal pressure can be increased.
- the amount of electrolyte in the cylindrical battery can be increased.
- the electrode group rattles against the battery case and the active material on the electrode plate falls off.
- the charge / discharge performance may be deteriorated, rattling of the electrode group with respect to the battery case is prevented by providing a spacer between the inner peripheral surface of the battery case and the outer surface forming the planar shape of the electrode group.
- the deterioration of the charge / discharge performance can be prevented by suppressing the falling off of the active material of the electrode plate.
- the cylindrical battery is a secondary battery
- the positive electrode or the negative electrode includes a current collecting base material and an active material.
- the electrode group has a shape in which a positive electrode plate and a negative electrode plate are laminated via a separator, and the electrode group has a lamination direction orthogonal to a central axis direction of the battery case. It is desirable that two or more spacers are provided in the battery case so as to sandwich the electrode group from the stacking direction.
- an electrode group so that it may be pinched
- the spacer contacts substantially the entire outermost surface in the stacking direction of the electrode group.
- the spacer contacts the battery case at at least four sides along the central axis direction or at least six sides along the central axis direction with the battery case. It is desirable to contact with.
- the contact portion of the spacer that contacts the inner peripheral surface of the battery case has an inner peripheral surface of the battery case. It is desirable to have a curved surface that is substantially the same as the curved surface.
- the spacer has a welding space for welding the electrode group to the battery case. It is desirable to form. Specifically, it is desirable that the spacer forms a space communicating vertically with a welding rod for welding the electrode group to the battery case. The welding location between the electrode group and the case faces the space.
- the spacer is provided between the inner peripheral surface of the battery case and each of the pair of outer surfaces, and each of the spacers has a plate-like electrode contact having a contact surface in contact with the electrode group on one surface. And a case contact portion that extends from the other surface of the electrode contact portion and contacts the inner peripheral surface of the battery case. If it is this, the space connected up and down by the other side of an electrode contact part, the side surface of a case contact part, and the inner surface of a battery case can be formed.
- the contact surface of the electrode contact portion in a state where it does not contact the electrode group is concave so that both end portions in the width direction of the contact surface are located on one side of the front side of the width direction center portion when viewed from above. It is desirable to be bent or bent. If this is the case, the contact surface of the electrode contact portion is curved or bent in a concave shape so that both end portions in the width direction of the contact surface are located in front of the one side of the width direction center portion in top view, When the electrode group is pressed by the spacer, a restoring force due to elastic deformation at both ends in the width direction is applied to both ends in the width direction of the electrode group. Thereby, the both ends of the width direction of the electrode group which tends to become weak can be pressed reliably, and charge / discharge efficiency can be improved.
- the contact surface is curved or bent in a concave shape by making the spacer warp so that both end portions in the width direction of the electrode contact portion are on one side of the front side in the width direction. It is desirable.
- the other surface of the spacer is curved or bent so as to be along the inner peripheral surface of the battery case, so that the spacer can be easily inserted into the battery case. The insertion failure at the time can be suppressed.
- both end portions in the width direction of the other surface of the electrode contact portion of the spacer are in contact with the inner peripheral surface of the battery case. If this is the case, both ends in the width direction come into contact with the inner peripheral surface of the battery case, thereby preventing the pressure at both ends in the width direction of the electrode contact portion acting on the electrode group from weakening and the reaction force received from the battery case. This makes it possible to increase the pressure acting on the electrode group.
- the electrode contact portion is warped so that both end portions in the width direction are located on the other side of the center portion in the width direction.
- both end portions in the width direction of the other surface of the electrode contact portion of the spacer are in contact with the inner peripheral surface of the battery case.
- the electrode group can be reliably pressed by the electrode contact portion, and the charge / discharge efficiency can be improved. That is, when the widthwise both ends of the other surface are in contact with the inner peripheral surface of the battery case, the widthwise central portion of the one surface is pressed toward the electrode group, and the widthwise central portion of the one surface The electrode group can be pressed reliably.
- a pressure reinforcing structure is formed at both ends in the width direction of the other surface of the electrode contact portion so as to contact the inner peripheral surface of the battery case and press the width direction both ends of the contact surface against the side surface of the electrode group. It is desirable. If it is this, the pressure reinforcement structure which contacts the inner peripheral surface of a battery case and presses the width direction both ends of a contact surface to the side surface of an electrode group in the width direction both ends of the other surface in an electrode contact part is formed. Therefore, when the thickness of the electrode group becomes thin due to manufacturing variations, etc., even if the electrode contact portion cannot be sufficiently pressed against the electrode group by the case contact portion, it is at both ends in the width direction of the other surface. Since the pressing reinforcement structure contacts the inner peripheral surface of the battery case, the electrode group can be reliably pressed by the electrode contact portion, and the charge / discharge efficiency can be improved.
- the case contact portions are formed in parallel along the central axis direction on the other surface of the electrode contact portion. Specifically, it is desirable that the two case contact portions are provided symmetrically so as to sandwich the central axis. If this is the case, the electrode contact portion can be uniformly pressed against the electrode group by the case contact portion in contact with the inner peripheral surface of the battery case, and the charge / discharge efficiency can be improved. Further, when formed away from the central portion in the width direction, a large space can be taken between the electrode contact portion and the battery case, so that the current collecting terminal can be easily welded to the battery case, and an electrolytic solution can be injected. It can be made easy to liquid.
- the spacer fixes the electrode group at a position eccentric from the center position of the battery case. If this is the case, the center of gravity of the electrode group having a large specific gravity will be located vertically below the center position of the battery case when the cylindrical battery is tilted, and the contact area between the electrolyte and the electrode group will be increased. Can do. Thereby, the penetration of the electrolytic solution into the electrode group during the chemical conversion can be facilitated.
- the center of gravity of the electrode group is located vertically below the center position of the battery case in the state of being laid down.
- side-down means that the center of gravity is lowered and the curved surface portion of the side surface of the cylinder is in contact with a plane perpendicular to the vertical direction.
- the spacer is a pair of spacers provided so as to sandwich the electrode group, the electrode group can be reliably pressed against the battery case. At this time, it is desirable that the pair of spacers have an asymmetric shape with respect to the electrode group when viewed from the central axis direction of the battery case.
- the electrode group can be fixed at a position eccentric with respect to the center position of the battery case.
- the electrode group can be fixed at a position eccentric with respect to the center position of the battery case by making the cross-sectional areas of the spacers different from each other.
- Each of the spacers has a flat electrode contact portion having a contact surface on one surface that contacts the side surface of the electrode group, and a case that extends from the other surface of the electrode contact portion and contacts the inner peripheral surface of the battery case It is desirable that the length of the case contact portion in each spacer is different from each other. If this is the case, the electrode group can be fixed at a position eccentric with respect to the center position of the battery case. Moreover, the recessed part formed between an electrode contact part and a case contact part becomes a welding space, and the current collection terminal of a positive electrode or a negative electrode can be welded to the bottom face of a battery case by the said welding space. At this time, since the lengths of the case contact portions of the spacers are different from each other, the position of the current collecting terminal can be easily determined at a glance, and the productivity can be improved.
- the positive current collector terminal or the negative current collector terminal extends to the inner peripheral surface of the battery case at an upper portion of the spacer opposite to the bottom surface side of the battery case.
- the current collecting terminal of the positive electrode or the current collecting terminal of the negative electrode plate extends to the inner peripheral surface of the battery case at the upper part of the spacer, so that the current collecting terminal is connected to the inner peripheral surface of the battery case by welding or the like. Work can be facilitated, and battery productivity can be improved.
- a current collecting terminal that is not connected to the inner peripheral surface of the battery case is connected to a sealing body that seals the upper opening of the battery case.
- the positive electrode current collector terminal and the negative electrode current collector terminal are not connected to the bottom surface side of the battery case, and the productivity of the cylindrical battery can be improved.
- the positive current collecting terminal or the negative current collecting terminal is welded to the inner peripheral surface of the battery case at the upper part of the spacer. If this is the case, it is possible to eliminate the difficulty of welding when the spacer is disposed, and the effects of the present invention can be made more prominent.
- the positive current collecting terminal or the negative current collecting terminal extends to the inner peripheral surface of the battery case along the upper surface of the spacer. In this case, since the current collecting terminal is on the upper surface of the spacer, the welding operation of the current collecting terminal can be further facilitated.
- a guide groove for guiding the positive current collector terminal or the negative current collector terminal to the inner peripheral surface of the battery case is formed on the upper surface of the spacer. If it is this, the position shift of a current collection terminal can be prevented during welding operation. Further, it is only necessary to form a guide groove on the upper surface of the spacer, and the processing of the spacer is facilitated.
- a through hole is formed with one end opened on the side surface side of the electrode group and the other end opened on the inner peripheral surface side of the battery case, and the current collector terminal of the positive electrode or the negative electrode It is desirable that a current collecting terminal extends to the battery case through the through hole.
- the current collector terminal can be positioned by simply passing the current collector terminal through the through hole.
- the opening on the inner peripheral surface side of the battery case in the spacer is in contact with the inner peripheral surface, the current collecting terminal passed through the through hole is between the spacer and the inner peripheral surface of the battery case. Since it is pinched
- the spacer is a pair provided between the inner peripheral surface of the battery case and each of the pair of outer surfaces, and ends of the paired spacers are continuous with each other and bent. It is desirable that the electrode group be sandwiched between.
- Each of the spacers has a flat electrode contact portion having a contact surface that contacts the electrode group on one surface, and a case contact portion that extends from the other surface of the electrode contact portion and contacts the inner peripheral surface of the battery case. It is desirable that the end of the electrode contact portion in the direction along the center axis direction of the battery case is continuous. In this case, when the spacer bent so as to sandwich the electrode group is inserted into the battery case, the bent portion of the spacer is located at the end in the direction along the central axis direction of the battery case. It is possible to prevent the insertion from being prevented by contacting the inner peripheral surface of the. Further, in the case where each spacer has a long and long shape in the direction along the central axis direction of the battery case, it is easy to bend because the end portions in the direction along the central axis direction of the battery case are continuous. There is also an effect.
- the electrolyte can be easily moved to the electrode group.
- a space is formed in the upper part of the battery case, and the movement space of the electrolytic solution is large, and the movement of the electrolytic solution is smooth.
- the bottom surface of the battery case is often provided in contact with an electrode group. On the bottom side of the battery case, the movement space of the electrolytic solution is small and the movement of the electrolytic solution is not smooth. For this reason, it is desirable to provide a gap on the bottom side of the battery case.
- a protruding piece facing the upper surface of the electrode group is provided on the spacer. If this is the case, when the current collector terminal is welded to the upper surface of the positive electrode or the negative electrode constituting the electrode group, the protruding pieces are in contact with the current collector terminal, so that the current collector terminal can be prevented from being displaced. It can prevent that the welding location of a current collection terminal will fracture
- a surrounding wall portion surrounding an upper corner portion of the electrode group is provided on the spacer. If it is this, it can prevent that the electrode from which polarity differs between a battery case and the said battery case. Further, it is possible to prevent contact between the current collecting terminal provided on the upper side of the electrode group and an electrode having a polarity different from that of the current collecting terminal. Further, it is possible to prevent the positive electrode and the negative electrode from shifting in the electrode group.
- the electrode group preferably includes a positive electrode having a substantially quadrangular prism shape, and a negative electrode having a flat plate shape provided on at least four side peripheral surfaces of the positive electrode with a separator interposed therebetween. If this is the case, the positive electrode capacity with respect to the cylindrical battery case can be increased by making the positive electrode into a substantially quadrangular prism shape. In addition, by providing a flat negative electrode on at least four side circumferential surfaces of the positive electrode, a high capacity can be achieved without deteriorating the discharge performance. Furthermore, with this configuration, the area of the opposing portion of the positive electrode and the negative electrode can be reduced, so that the amount of separator used can also be reduced.
- the negative electrode is composed of two negative electrode plates formed by being bent in a substantially U-shape, and one negative electrode plate faces a side peripheral surface and a bottom surface forming one pair of the positive electrode plates. It is desirable that the other negative electrode plate is provided to face the side peripheral surface and the bottom surface forming the other pair of the positive electrode plates. If this is the case, it is only necessary to bend the two negative electrode plates into a substantially U shape and sandwich the positive electrode, so that the number of parts is larger than when the negative electrode is provided on each of the four side peripheral surfaces of the positive electrode, for example. Can be reduced and battery assembly can be facilitated.
- one current collecting terminal of the positive electrode or the negative electrode is in contact with the inner surface of the battery case without being welded and is pressed against the inner surface by the spacer. If this is the case, one current collecting terminal of the positive electrode plate or the negative electrode plate is in contact with the inner surface of the battery case without being welded, and is pressed against the inner surface by the spacer, so the current collecting terminal is welded to the battery case. Since the current collecting terminal and the battery case can be brought into contact with each other simply by inserting the spacer into the battery case, the number of manufacturing steps can be reduced. In addition, since the current collecting terminal is pressed against the battery case by the spacer, the electrical connection between the current collecting terminal and the battery case can be maintained well, and the resistance between the current collecting terminal and the battery case can be maintained. Can be made as small as possible.
- the electrode group is fixed with a spacer, it is conceivable that the electrode group is displaced from the battery case in the central axis direction, that is, in the vertical direction of the battery case.
- the contact with the battery case can be maintained, and in order to maintain a good electrical connection, the current collecting terminal is arranged on the inner side of the battery case. It is desirable to be in contact with the peripheral surface.
- the battery case is disposed in the battery case and is provided in contact with the electrode group.
- the liquid holding member holds an electrolytic solution, and the spacer presses the electrode group and the liquid holding member against the battery case. Is desirable.
- the electrolytic solution can be supplied from the liquid retaining member to the electrode group, and the electrolytic solution retained in the separator can be supplied. Since it can be maintained sufficiently, an increase in internal resistance of the electrode group can be suppressed. At this time, since it is not necessary to increase the thickness of the separator in the electrode group, the discharge performance of the electrode group does not deteriorate.
- the liquid retaining member is pressed by the spacer, the contact between the liquid retaining member and the electrode group can be maintained.
- the liquid retaining member is pressed between the spacer and the electrode group.
- the liquid retaining member is sandwiched between the spacer and the electrode group and pressed. It is desirable that
- the spacer is provided so as to sandwich the electrode group from the stacking direction, and the positive electrode or the negative electrode is one first electrode plate element having a current collecting terminal and one or more not having a current collecting terminal. It is desirable that the second electrode plate elements be stacked so as to be in contact with each other. In this case, by dividing the positive electrode or the negative electrode into the first electrode plate element and the second electrode plate element, the thickness of the first electrode plate element provided with the current collecting terminal can be reduced as much as possible. It is possible to reduce the amount of active material removed in the monopolar plate element. On the other hand, it is not necessary to remove the active material in the second electrode plate element.
- the loss of an active material can be decreased and the filling property of the active material as the whole electrode can be improved.
- the current collecting terminal only needs to be welded to the first electrode plate element, and it is not necessary to weld an extra current collecting terminal, so that productivity can be improved.
- the spacers sandwich the electrode group from the stacking direction, the electrode group is pressed, so that the first electrode plate element and the second electrode plate element are in sufficient pressure contact with each other, and sufficient conductivity is obtained. Can be taken.
- the present invention requires a thick electrode plate when the opposing area of the negative electrode and the positive electrode is small, but is particularly effective in this case.
- a cylindrical battery that does not require the winding process of the electrode group and does not need to consider the winding deviation of the electrode group is provided, and in the cylindrical battery, the active material of the electrode plate It is possible to prevent the charge / discharge performance from deteriorating.
- the cross-sectional view of the cylindrical battery of the first embodiment. The exploded view of the electrode group of 1st Embodiment.
- the cross-sectional view of the alkaline storage battery in the modification of 1st Embodiment. The cross-sectional view of the alkaline storage battery in the modification of 1st Embodiment.
- the cross-sectional view of the alkaline storage battery in the modification of 1st Embodiment. The perspective view and side view which show the modification of a spacer.
- the figure which shows the modification of a spacer. The cross-sectional view of the alkaline storage battery in the modification of 1st Embodiment.
- the cross-sectional view of the cylindrical battery of 4th Embodiment. The schematic diagram which shows the state which laid down the cylindrical battery of 4th Embodiment on the plane.
- the disassembled perspective view which shows the battery case of 5th Embodiment, an electrode group, and a spacer.
- the disassembled perspective view which shows the battery case of 5th Embodiment, an electrode group, and a spacer.
- the top view and perspective view which show the negative electrode plate of 6th Embodiment.
- the figure which shows the manufacturing process of the negative electrode plate of 6th Embodiment The longitudinal cross-sectional view of the cylindrical battery of 6th Embodiment.
- the cross-sectional view of the cylindrical battery of 6th Embodiment The bottom view which shows the state except the bottom wall of 6th Embodiment.
- Sectional drawing which shows the modification of the positive electrode plate of 9th Embodiment.
- Sectional drawing which shows the modification of the positive electrode plate of 9th Embodiment.
- the perspective view which shows the positive electrode of 10th Embodiment.
- the perspective view which shows the spacer of 10th Embodiment.
- the figure which shows the state which accommodated the electrode group and spacer of 10th Embodiment in the battery case.
- the side view which shows the modification of the spacer of 10th Embodiment.
- the cylindrical battery 100 is an alkaline storage battery such as a nickel / cadmium storage battery or a nickel / hydrogen storage battery. Specifically, this can be a low-capacity type having, for example, an AA type capacity of 1800 mAh or less, or an AA type capacity of 650 mAh or less. As shown in FIGS. A metal battery case 2 having a bottom cylindrical shape and a substantially rectangular parallelepiped electrode group 3 including a positive electrode plate 31, a negative electrode plate 32, and a separator 33 are arranged in the battery case 2.
- the battery case 2 has a bottomed cylindrical shape with nickel plating, and the upper opening is sealed with a sealing body 5 via an insulator 4 as shown in FIG. Further, a current collecting terminal 311 provided so as to protrude from the upper end portion of the positive electrode plate 31 is connected to the back surface of the sealing body 5 by, for example, welding directly or via a current collecting plate (not shown). It becomes the positive terminal. In the present embodiment, as will be described later, the current collecting terminal 321 of the negative electrode plate 32 positioned on the outermost side of the electrode group 3 is welded to the bottom surface 2B of the battery case 2.
- the electrode group 3 is formed by laminating a positive electrode plate 31 and a negative electrode plate 32 via a separator 33 made of, for example, a non-woven fabric made of polyolefin, and a pair of outer surfaces facing each other form a flat shape. Specifically, in this embodiment, it has a substantially rectangular parallelepiped shape.
- the electrode group 3 is not limited to a substantially rectangular parallelepiped shape as long as a pair of opposed outer surfaces forms a flat shape, and a side surface orthogonal to the pair of outer surfaces forms a step shape or an arc shape. May be.
- the separator 33 is impregnated with an electrolytic solution such as potassium hydroxide.
- the positive electrode plate 31 is obtained by filling a positive electrode substrate made of nickel foam and a mixture of a nickel hydroxide active material and a cobalt compound of a conductive material into the hollow of the positive electrode substrate.
- the positive electrode plate 31 is pressure-molded after being filled with the mixture.
- a current collecting terminal 311 is provided on a part of the positive substrate.
- the nickel hydroxide active material is, for example, nickel hydroxide in the case of a nickel / cadmium storage battery, and nickel hydroxide to which calcium hydroxide is added in the case of a nickel / hydrogen storage battery.
- the negative electrode plate 32 is made of, for example, a negative electrode current collector made of a flat perforated steel plate plated with nickel, and a negative electrode active material coated on the negative electrode current collector.
- the negative electrode active material in the case of nickel-cadmium battery is a mixture of e.g. cadmium oxide powder and metallic cadmium powder, in the case of nickel-hydrogen storage battery, for example, primarily AB 5 type (rare earth) or is a powder of hydrogen absorbing alloy of AB 2 type (Laves phase).
- the electrode group 3 of the present embodiment is configured so that one positive electrode plate 31 is sandwiched between two opposite side surfaces 31 a and 31 b of the positive electrode plate 31 via a separator. These are laminated, and are configured such that the negative electrode plates 32 are positioned on both outermost surfaces in the laminating direction L, respectively.
- the electrode group 3 of the present embodiment is accommodated in the battery case 2 so that the stacking direction L is orthogonal to the central axis direction C of the battery case 2 as shown in FIGS. 1 and 2.
- the cylindrical battery 100 of the present embodiment has a spacer 6 for pressing the electrode group 3 as shown in FIGS. 1 and 2.
- the spacer 6 is a pair of spacers 61 and 62 that are provided between the inner peripheral surface of the battery case 2 and the side surface of the electrode group 3 and fix the electrode group 3 to the battery case 2.
- the pair of spacers 61 and 62 are disposed in a space between the inner peripheral surface of the battery case 2 and the side surface of the electrode group 3 so as to sandwich the electrode group 3 from the stacking direction L.
- the pair of spacers 61 and 62 are made of resin such as acrylic resin, polypropylene resin, nylon resin, or metal such as stainless steel, and have the same shape.
- Each of the spacers 61 and 62 has an equal cross-sectional shape in the central axis direction C, and is preferably in contact with substantially the entire outer surfaces 32a and 32b (see FIG. 2) of the negative electrode plate 32 in the stacking direction L. Further, the spacers 61 and 62 are in contact with the inner peripheral surface of the battery case 2 in the vertical direction. Thereby, the whole electrode group 3 will be pressed uniformly by a pair of spacers 61 and 62, and charging / discharging efficiency will improve.
- the contact portion between the spacer and the electrode plate may be a part.
- a portion that contacts the battery case 2 may be formed in an arc shape so as to contact over a predetermined range in the circumferential direction of the battery case 2.
- the spacers 61 and 62 may have a square shape and have a side that contacts the battery case 2 as shown in FIG.
- the battery case 2 and the spacers 61 and 62 are preferably in contact with each other on at least four sides. As shown in FIG.
- the space between the spacers 61 and 62 and the battery case 2 can be increased, which contributes to an increase in the amount of electrolyte and a decrease in the increase in internal pressure.
- the battery case 2 and the spacers 61 and 62 are preferably in contact with each other on at least six sides. By making contact on the six sides, the shape of the battery case 2 can be kept substantially circular. If the shape of the battery case 2 is deformed and becomes an ellipse, there is a possibility that a defect will occur at the time of sealing.
- the side is a side parallel to the central axis direction.
- the spacers 61, 62 are arranged at the upper and lower sides where the welding rod WR for welding the current collecting terminal 321 of the negative electrode plate 32 of the electrode group 3 to the bottom surface 2 ⁇ / b> B of the battery case 2 is inserted.
- a space S communicating in the (center axis direction C) is formed.
- the space S communicates from the bottom surface 2 ⁇ / b> B of the battery case 2 to the upper opening of the battery case 2.
- the spacers 61 and 62 have an insertion hole 6H that communicates vertically with the welding rod WR inserted therein.
- the shape of the insertion hole 6H is not limited to a circle as long as it can be welded by inserting the welding rod WR, and may be a polygon or an ellipse.
- each negative electrode plate 32 is welded to the bottom surface 2B of the battery case 2, and an insertion hole 6H is formed in each of the spacers 61 and 62 in contact with each negative electrode plate 32.
- the position where the insertion hole 6H is provided is a position where the current collecting terminal 321 of the negative electrode plate 32 is located in the insertion hole 6H in a state where the electrode group 3 is fixed by the spacers 61 and 62, and the position of the current collecting terminal 321 of the negative electrode plate 32 is It is determined according to the position.
- separators 33 are provided on two side surfaces 31a and 31b of the positive electrode plate 31 facing each other.
- the separator 33 has a bag shape, and the separator 33 is provided on the four side surfaces of the positive electrode plate 31 by accommodating the positive electrode plate 31 in the bag-shaped separator 33.
- the negative electrode plate 32 is laminated
- the electrode group 3 configured by stacking in this manner is sandwiched between the pair of spacers 61 and 62 from the stacking direction L. The structure thus formed is placed in the battery case 2 (see FIG. 6).
- the collector terminal 321 of the negative electrode plate 32 is positioned in the insertion hole 6H of the spacers 61 and 62 in the arranged state.
- the pair of spacers 61 and 62 may be accommodated so as to sandwich the electrode group 3.
- the welding rod WR is inserted into the insertion hole 6 ⁇ / b> H provided in the spacers 61 and 62, and the current collecting terminal 321 of the negative electrode plate 32 is connected to the bottom surface 2 ⁇ / b> B of the battery case 2. And welded to each other (see FIG. 7). Thereafter, an electrolytic solution is injected into the battery case 2.
- the current collecting terminal 311 of the positive electrode plate 31 is connected to the back surface of the sealing body 5 directly or via a current collecting plate (not shown), and the sealing body 5 is connected to the upper opening of the battery case 2 via the insulator 4. Secure by caulking.
- the electrode group 3 in which the positive electrode plate 31 and the negative electrode plate 32 are stacked via the separator 33 is accommodated in the battery case 2. It is possible to provide a battery that is free from various problems associated with winding misalignment and winding misalignment. Moreover, since it is the cylindrical battery case 2, it can be strengthened in strength against the increase in internal pressure.
- the electrode group 3 is pressed and fixed in the battery case 2 using the spacers 61 and 62, rattling of the electrode group 3 with respect to the battery case 2 can be prevented, and the positive electrode plate 31 and the negative electrode In addition to preventing the active material from falling off the plate 32 and preventing the deterioration of the charge / discharge performance, the charge / discharge performance can be improved.
- the welding rod insertion holes 6H are formed in the spacers 61 and 62, the current collecting terminals 321 of the negative electrode plate 32 can be welded after the electrode group 3 and the spacers 61 and 62 are inserted into the battery case 2.
- the spacers 61 and 62 are inserted after the current collecting terminal 321 of the negative electrode plate 32 is welded, the position of the electrode group 3 may be shifted before and after the spacers 61 and 62 are inserted. Although there is a concern that it will break, this problem does not occur when the spacers 61 and 62 are welded after insertion as in this embodiment.
- the present invention is not limited to the first embodiment.
- the welding space is secured by the insertion holes 6H provided in the spacers 61 and 62, but as shown in FIG. 8, the spacers 61 and 62 are not provided with the insertion holes 6H.
- a welding space may be formed by the external shape 62. Specifically, it is conceivable that the cross-sectional shape is equal in the central axis direction C having the recess 6S on the side surface.
- an electrode contact portion 6A that contacts the outermost surface in the stacking direction of the electrode group 3, one or more case contact portions 6B that contact the inner peripheral surface of the battery case 2, and a gap between them. And a recess 6S.
- the current collecting terminal 321 of the negative electrode plate 32 is welded to the bottom surface 2B of the battery case 2 by the welding space formed by the recess 6S of the spacers 61 and 62 after the spacers 61 and 62 are inserted. Can do.
- the spacers 61 and 62 have a plurality of case contact portions 6B intermittently along the central axis direction C as shown in FIG. It may have a generally comb-tooth shape. By comprising in this way, the usage-amount of the material of the spacers 61 and 62 can be reduced, and cost can be reduced. Moreover, the injection of the electrolytic solution is facilitated.
- R-shaped portions R1 and R2 are provided at two corners along the longitudinal direction formed by the electrode contact portion 6A and the case contact portion 6B.
- two corners R1 along the longitudinal direction formed by the electrode contact portion 6A and each case contact portion 6B and at least one corner along the short direction are rounded.
- a portion R2 is provided.
- the ends of the pair of spacers 61 and 62 are continuous with each other, and the electrode group 3 may be sandwiched by bending the integrally formed spacer member 6Z.
- the pair of spacers 61 and 62 it is desirable that the end portions in the direction along the central axis direction C of the battery case 2 are continuous.
- it has an electrode contact portion 6A that contacts the outermost surface in the stacking direction of the electrode group 3, and one or more case contact portions 6B that contact the inner peripheral surface of the battery case 2.
- a configuration in which end portions in the direction along the central axis direction C of the battery case 2 in the contact portion 6A are contiguous can be considered.
- the electrode group 3 can be fixed simply by bending the spacers 61 and 62 so as to sandwich the electrode group 3 when the battery is assembled.
- the stacking deviation of the battery can be suppressed, and the battery assembly operation can be facilitated.
- difference of the electrode group 3 can be suppressed, insertion to the battery case 2 of the electrode group 3 and the spacers 61 and 62 can be made easy.
- the number of parts can be reduced by integrating the spacers 61 and 62.
- the bent portions of the spacers 61 and 62 are end portions in the direction along the central axis direction C of the battery case 2. Therefore, it is possible to prevent the insertion from being disturbed by contacting the inner peripheral surface of the battery case 2. Further, when the spacers 61 and 62 are long and long in the direction along the central axis direction C of the battery case 2, the end portions of the battery case 2 in the direction along the central axis direction C are continuous. As a result, there is an effect that it is easy to bend.
- the two opposite side surfaces of the electrode group are fixed to the battery case so as to be sandwiched between a pair of spacers.
- the two opposite side surfaces of the electrode group are sandwiched between three or more spacers.
- spacers may be provided between the four side surfaces of the electrode group and the inner peripheral surface of the battery case.
- each spacer may be integrated by a connecting portion.
- the electrode group 3 has a positive electrode 31 having a substantially quadrangular prism shape, and a flat plate shape provided to face at least four outer surfaces 31a to 31d of the positive electrode 31 with a separator 33 therebetween. It may have a negative electrode 32 formed.
- the positive electrode 31 may be one in which a positive electrode base material is filled with a positive electrode active material from a single member having a substantially quadrangular prism shape, or by laminating or bending a flat plate-like positive electrode base material filled with a positive electrode active material, A substantially quadrangular prism may be used.
- the positive electrode 31 desirably has a substantially square cross section perpendicular to the central axis direction C of the battery case 2.
- the current collecting terminal of the positive electrode 31 may be one obtained by compressing a positive electrode base material or welding a current collecting terminal made of, for example, a nickel steel plate to the positive electrode base material.
- the negative electrode 32 is composed of two negative electrode plates formed by being bent in a substantially U shape, and one negative electrode plate is formed on the outer surfaces 3a, 3b and the bottom surface forming one pair of the positive electrodes.
- the other negative electrode plate is provided to face the outer side surfaces 3c, 3d and the bottom surface forming the other pair of the positive electrodes 31.
- the assembly of the battery can be facilitated.
- the positive electrode 31 into a substantially quadrangular prism shape, the positive electrode capacity with respect to the cylindrical battery case 2 can be increased.
- the cross section of the positive electrode 31 is substantially square, the positive electrode capacity for the battery case 2 can be further increased.
- the flat negative electrode 32 on at least four outer surfaces 31a to 31d of the positive electrode 31, a high capacity can be achieved without degrading the discharge performance.
- the usage amount of the separator 33 can also be reduced.
- the two negative electrode plates since it is only necessary to bend the two negative electrode plates into a substantially U shape and sandwich the positive electrode 31, for example, compared to the case where the negative electrode 32 is provided on each of the four outer surfaces 31 a to 31 d of the positive electrode 31. Thus, the number of parts can be reduced and the battery can be easily assembled.
- the spacer of the above embodiment forms a welding space.
- the spacer is disposed after the current collecting terminal of the negative electrode plate of the electrode group is welded to the battery case, the spacer has a welding space. It does not have to be formed.
- the negative electrode plate 32 sandwiching the positive electrode plate 31 may be two independent negative electrode plates, or is bent in a generally U shape, and the positive electrode plate 31 is disposed therein. It may be a single negative electrode plate configured. In the case of a single negative electrode plate, the current collecting terminal can be made one, so that a welding rod insertion hole may be formed in one of the pair of spacers. Thereby, the welding operation can be simplified.
- the positive electrode plate is configured in such a manner that a positive electrode active material is applied to a flat-plate positive electrode current collector in the same manner as the negative electrode plate 32, and a plurality of positive electrode plates and a plurality of negative electrode plates are alternately arranged via separators. It may be configured to be laminated. Even in this case, the stacking direction is accommodated in the battery case so as to be orthogonal to the central axis direction of the battery case.
- the electrode group of the embodiment is arranged in the battery case such that the stacking direction is orthogonal to the central axis direction of the battery case, but the stacking direction is the central axis direction of the battery case. You may arrange
- the cylindrical battery 100 according to the second embodiment is different from the first embodiment in the configuration of the electrode group and the configuration of the pair of spacers (the first spacer and the second spacer).
- the electrode group 3 sandwiches one positive electrode plate 31 between two opposite side surfaces 31 a and 31 b of the positive electrode plate 31 via the separator 33. 1 or a plurality of electrode plate units 3U stacked on each other.
- the negative electrode plate 32 is bent into a substantially U shape to form a U-shaped electrode plate, and the flat plate portions 32m and 32n opposed to each other sandwich the positive electrode plate 31. It is bent to form a letter shape.
- the negative electrode plates 32 are positioned on both outermost surfaces in the stacking direction L, respectively.
- Adjacent electrode plate units 3U are electrically connected to each other when the flat plate portions 32m and 32n of the negative electrode plate 32 are in surface contact.
- the negative electrode plate 32 of the other electrode plate unit 3U is electrically connected to the bottom surface 2B of the battery case 2 by welding the current collecting terminal 321 coming out of one electrode plate unit 3U.
- the current collecting terminal 321 formed on the negative electrode plate 32 of one electrode plate unit 3U extends from the center in the width direction of the negative electrode plate 32 to the outer side in the stacking direction (see FIG. 13), and is generally U-shaped. It is formed by bending a part of the bottom surface portion 32o (connecting portion of the flat plate portion 32m and the flat plate portion 32n) of the negative electrode plate 32 forming the outer side.
- the current collecting terminal 321 is formed by making a cut in a part of the bottom surface portion 32o so as to have a desired current collecting terminal shape and bending the inside of the cut to the outside.
- the first spacer 61 has a contact surface that contacts substantially the entire outermost surface of the electrode group 3 in the stacking direction L (specifically, the outer surface 32 a of the negative electrode plate 32). It has a rectangular flat electrode contact portion 61A on the surface 61a, and a case contact portion 61B that extends from the other surface 61b of the electrode contact portion 61A and contacts the inner peripheral surface 2A of the battery case 2.
- the cross section has an approximately T-shaped equi-cross section when viewed from the axial direction C.
- the electrode contact portion 61 ⁇ / b> A has a shape along the outermost surface (outer surface 32 a) in the stacking direction L of the electrode group 3.
- case contact portion 61B has a substantially rectangular shape in a side view provided from the upper end to the lower end of the center portion in the width direction of the electrode contact portion 61A, and extends vertically on the inner peripheral surface 2A of the battery case 2. Touch.
- the second spacer 62 has a contact surface that contacts substantially the entire outermost surface of the electrode group 3 in the stacking direction L (specifically, the outer surface 32 b of the negative electrode plate 32).
- a rectangular flat plate-shaped electrode contact portion 62A on the surface 62a and a case contact portion 62B extending from the other surface 62b of the electrode contact portion 62A and contacting the inner peripheral surface 2A of the battery case 2 are formed in an equal cross-sectional shape.
- the electrode contact portion 62 ⁇ / b> A has a shape along the outermost surface (outer surface 32 b) in the stacking direction L of the electrode group 3.
- the case contact portion 62B has a substantially rectangular shape in side view provided from the upper end to the lower end of the center portion in the width direction of the electrode contact portion 62A, and extends vertically on the inner peripheral surface 2A of the battery case 2. Touch.
- the case contact portions 61B and 62B of the first spacer 61 and the second spacer 62 are in contact with each other over the inner peripheral surface 2A, so that the entire electrode group 3 is uniformly formed by the pair of spacers 61 and 62. The charging / discharging efficiency is improved.
- the first spacer 61 and the second spacer 62 are contact surfaces 61a of the electrode contact portions 61A and 62A in a state where they do not contact the electrode group 3 (natural state where they do not receive external force).
- 62a are configured to be curved in a concave shape so that both end portions in the width direction of the contact surfaces 61a and 62a are located on one side of the front side of the center portion in the width direction when viewed in cross section.
- both end portions in the width direction of the contact surfaces 61a and 62a are portions in contact with both end portions in the width direction of the outermost surface in the stacking direction L of the electrode group 3, and the center portions in the width direction of the contact surfaces 61a and 62a are in the electrode group.
- 3 is a portion that contacts the central portion in the width direction of the outermost surface in the stacking direction L.
- the spacers 61 and 62 of the present embodiment have an equal cross-sectional shape, and the shape in a cross-sectional view and the shape in a top view are the same.
- the spacers 61 and 62 are shaped so that both end portions in the width direction of the electrode contact portions 61A and 62A are warped so as to be forward of one side of the center portion in the width direction. 62a are curved in a concave shape. Moreover, in each spacer 61 and 62, electrode contact part 61A, 62A is a left-right symmetric shape with respect to case contact part 61B, 62B.
- the electrode contact portions 61A and 62A are warped on the opposite side (electrode group 3 side) from the case contact portions 61B and 62B, when the spacers 61 and 62 are inserted into the battery case 2, the spacer 61, 62 and the electrode group 3 sandwiched between the spacers 61 and 62 are easily inserted into the battery case 2. Thereby, poor insertion can be suppressed.
- the electrode contact portion 61 ⁇ / b> A is received by the repulsive force that the case contact portions 61 ⁇ / b> B and 62 ⁇ / b> B contact the inner peripheral surface 2 ⁇ / b> A of the battery case 2 and receive from the battery case 2.
- 62A is pressed to the electrode group 3 side. Further, at this time, the electrode contact portions 61A and 62A are moved to the electrode group 3 side not only by the pressing force received from the case contact portions 61B and 62B but also by restoring force due to elastic deformation at both ends in the width direction of the electrode contact portions 61A and 62A Press.
- the center portion in the width direction of the electrode group 3 is reliably pressed by the pressing force received from the case contact portions 61B and 62B, and both end portions in the width direction of the electrode group 3 are from the case contact portions 61B and 62B. In addition to the received pressing force, it is surely pressed by the elastic return force of the electrode contact portions 61A and 62A.
- the contact surfaces 61a and 62a of the electrode contact portions 61A and 62A have widths at both ends in the width direction of the contact surfaces 61a and 62a in a cross-sectional view. Since the electrode group 3 is pressed from the stacking direction L by the spacers 61 and 62, it is restored by elastic deformation at both end portions in the width direction because the electrode group 3 is pressed from the stacking direction L by the spacers 61 and 62. A force is applied to both ends in the width direction of the electrode group. Thereby, the both ends of the width direction of the electrode group 3 which tends to become weak can be pressed reliably, and charge / discharge efficiency can be improved.
- the present invention is not limited to the second embodiment.
- the contact surfaces 61a and 62a are curved in a concave shape, but may be curved in a concave shape as shown in FIG. Even in this case, the center portion in the width direction of the electrode group 3 can be reliably pressed by the acting force from the case contact portions 61B and 62B, and both end portions in the width direction of the electrode group 3 can be surely pressed. it can.
- FIG. 17A shows the first spacer 61.
- the contact surfaces 61a and 62a are curved in a concave shape by making the electrode contact portions 61A and 62A warp in a concave shape, as shown in FIG.
- the contact surfaces 61a and 62a may be curved in a concave shape without making the electrode contact portions 61A and 62A warped. Even in this case, the same effects as those of the above embodiment can be obtained.
- FIG. 17B illustrates the first spacer 61.
- the cylindrical battery 100 according to the third embodiment is different from the first embodiment in the configuration of the electrode contact portions 61A and 62A in the pair of spacers 61 and 62.
- the first spacer 61 and the second spacer 62 are disposed in the electrode contact portions 61 ⁇ / b> A and 62 ⁇ / b> A in a state before being placed in the battery case 2 (a natural state in which no external force is received).
- the shape is warped so that both end portions in the width direction are located on the other surface 61b, 62b side than the center portion in the width direction. That is, the electrode contact portions 61A and 62A have shapes that warp on the case contact portions 61B and 62B side (counter electrode group side).
- the contact surfaces 61a and 62a of the electrode contact portions 61A and 62A protrude so that both end portions in the width direction of the contact surfaces 61a and 62a are located on the one side rear side of the center portion in the width direction in the cross sectional view. It is comprised so that it may curve in the shape.
- the spacers 61 and 62 of the present embodiment have an equal cross-sectional shape, and the shape in a cross-sectional view and the shape in a top view are the same.
- both end portions in the width direction of the other surfaces 61 b and 62 b of the electrode contact portions 61 A and 62 A of the spacers 61 and 62 are inside the battery case 2. It is comprised so that 2 A of surrounding surfaces may be contacted.
- the thickness of the electrode group 3 is reduced in production. Even when the electrode contact portions 61A and 62A cannot be sufficiently pressed against the electrode group 3 by the case contact portions 61B and 62B, both end portions in the width direction of the other surfaces 61b and 62b are reduced. Since it contacts the inner peripheral surface 2A of the battery case 2, the electrode group 3 can be reliably pressed by the electrode contact portions 61A and 62A, and charge / discharge efficiency can be improved.
- the width direction central portion of the one surface 61a and 62a is pressed toward the electrode group 3 side.
- the electrode group can be reliably pressed by the central portion in the width direction of the one surfaces 61a and 62a.
- the present invention is not limited to the third embodiment.
- the contact surfaces 61a and 62a are curved in a convex shape (the other surfaces 61b and 62b are curved in a concave shape) because the electrode contact portions 61A and 62A have a convex shape.
- the contact surfaces 61a and 62a are made flat and the other surfaces 61b and 62b are made to be flat without making the electrode contact portions 61A and 62A warped. It may be curved in a concave shape. Even in this case, the same effects as those of the second embodiment can be obtained.
- FIG. 19A illustrates the first spacer 61.
- the electrode contact portions 61A, 62A are warped, so that both end portions in the width direction of the other surfaces 61b, 62b of the electrode contact portions 61A, 62A are on the inner peripheral surface 2A of the battery case 2.
- the protrusions 8 may be formed on both ends of the other surfaces 61b and 62b in the width direction, or one or a plurality of protrusions partially formed on both ends in the width direction.
- FIG. 19B illustrates the first spacer 61.
- the cylindrical battery 100 according to the fourth embodiment is different from the first to third embodiments in the configuration of a pair of spacers (a first spacer and a second spacer).
- the pair of spacers 61 and 62 fix the electrode group 3 at a position eccentric from the center position H1 of the battery case 2. That is, as shown in FIG. 20, the center position (center of gravity position) H ⁇ b> 2 (viewed from the central axis direction C) of the electrode group 3 fixed to the battery case 2 is different from the center position H ⁇ b> 1 of the battery case 2. Position. Thereby, the center of gravity position (not shown) of the entire cylindrical battery 100 is different from the center position H1 of the battery case 2.
- the pair of spacers 61 and 62 are asymmetric with respect to the electrode group 3 when viewed from the central axis direction C of the battery case 2, and the spacers 61 and 62 are arranged in the stacking direction L of the electrode group 3.
- the cross-section is substantially semicircular and has an equivalent cross-sectional shape.
- the case contact surface 6y contacts the inner peripheral surface 2A of the battery case 2 vertically.
- the cross-sectional area surrounded by the electrode contact surface 6x and the case contact surface 6y in the cross section orthogonal to the central axis direction C is The first spacer 61 and the second spacer 62 are different from each other.
- the second spacer 62 is configured to have a large contour cross-sectional area. That is, the center position H2 of the electrode group 3 is a position eccentric to the first spacer 61 side with respect to the center position H1 of the battery case 2.
- the second spacer 62 having a large contour cross-sectional area is formed with a welding hole 62h into which a welding rod for welding the current collecting terminal 321 of the negative electrode plate 32 to the bottom surface 2B of the battery case 2 is inserted.
- the weld hole 62h is not particularly limited as long as it has a shape and size into which a welding rod can be inserted, such as an elliptical shape or a rectangular shape in addition to a circular shape as shown in FIG.
- the cylindrical battery 100 When the above-described cylindrical battery 100 is formed into a battery case, the cylindrical battery 100 is laid sideways as shown in FIG.
- the cylindrical battery 100 laid sideways rolls because its center of gravity is eccentric from the center position H1 of the battery case 2, and the center position H2 of the electrode group 3 having a large specific gravity is positioned vertically below the center position H1. It stops in the state. Thereby, the contact area of the electrode group 3 and electrolyte solution can be enlarged, and penetration of the electrolyte solution to the electrode group 3 can be promoted.
- the pair of spacers 61 and 62 fix the electrode group 3 at a position eccentric from the center position H1 of the battery case 2, so that the cylindrical battery 100 is In the tilted state, the center position H2 of the electrode group 3 having a large specific gravity is positioned vertically below the center position H1 of the battery case 2, so that the contact area between the electrolyte and the electrode group 3 can be increased. . Thereby, the penetration of the electrolytic solution into the electrode group 3 at the time of battery case formation can be facilitated.
- the spacer shape is not limited to the fourth embodiment, and the second spacer 62 may not have the weld hole 62h as shown in FIG.
- the current collecting terminal 321 of the negative electrode plate 32 is welded before the spacers 61 and 62 are arranged on the battery case 2, or is not welded to the battery case 2 by the lower surface of the second spacer 62. It is conceivable to make a press contact with the bottom surface 2B.
- the spacers 61 and 62 of the fourth embodiment have a substantially semicircular cross section made up of a planar electrode contact surface 6x and an arcuate case contact surface 6y. Any shape can be used as long as it has a shape having 6x and a case contact surface 6y and fixes the electrode group 3 at a position eccentric from the center position H1 of the battery case 2.
- each spacer 61, 62 has a contact surface that contacts substantially the entire outermost surface of the electrode group 3 in the stacking direction L (specifically, the outer surface 32 a of the negative electrode plate 32) on one side. It is good also as what has the flat electrode contact part 6A which 6a has, and the case contact part 6B which extends from the other surface 6b of this electrode contact part 6A, and contacts the inner peripheral surface 2A of the battery case 2. And in order to fix the electrode group 3 in the position eccentric with respect to the center position H1 of the battery case 2, it is possible to comprise so that the length of the case contact part 6B in each spacer 61 and 62 may mutually differ.
- a recess formed between the electrode contact portion 6A and the case contact portion 6B becomes a welding space, and the current collecting terminal 321 of the negative electrode plate 32 is connected to the battery case by the welding space. 2 can be welded to the bottom surface 2B.
- the lengths of the case contact portions 6B of the spacers 61 and 62 are different from each other, for example, by extending the current collecting terminal 321 to the long spacer 62 side of the case contact portion 6B, the current collecting terminals 321 at a glance. The position can be easily determined, and the productivity can be improved.
- only one of the plurality (specifically, two) of the electrode plate units is configured to have a current collecting terminal of the negative electrode plate. You may comprise so that a unit may have the current collection terminal of a negative electrode plate.
- the cylindrical battery 100 according to the fifth embodiment is different from the first to fourth embodiments in the configuration of the electrode group and the configuration of the pair of spacers (the first spacer and the second spacer).
- the electrode group is configured such that one positive electrode plate 31 is sandwiched between two opposite side surfaces 31 a and 31 b of the positive electrode plate 31 with the negative electrode plate 32 interposed between the separators 33. It is configured using one or a plurality of stacked electrode plate units.
- the negative electrode plate 32 is bent into a substantially U shape to form a U-shaped electrode plate, and the flat plate portions 32m and 32n opposed to each other sandwich the positive electrode plate 31. It is bent to form a letter shape.
- the negative electrode plates 32 are located on both outermost surfaces in the laminating direction L, respectively.
- the current collection terminal 321 is connected to the upper part of one negative electrode plate 32 located in the outermost part (upper part on the opposite side to the bottom face 2B of the battery case 2) by welding or the like.
- the pair of spacers 61 and 62 are continuous to the planar electrode contact surface 6x that is in contact with the outermost surface in the stacking direction L of the electrode group 3, and to both ends in the width direction of the electrode contact surface 6x.
- the cross-section is substantially semicircular and has a substantially semicircular cross-section having a substantially arc-shaped case contact surface 6 y that is provided and contacts the inner peripheral surface 2 ⁇ / b> A of the battery case 2. And the case contact surface 6y contacts the inner peripheral surface 2A of the battery case 2 vertically.
- the current collecting terminal 321 of the negative electrode plate 32 is located above the one spacer (the spacer 61 in the present embodiment) of the battery case 2. It extends to the inner peripheral surface 2A of the battery case 2 along a direction orthogonal to the central axis direction C (in the present embodiment, the stacking direction L).
- the upper portion of the spacer 61 is a portion on the opposite side to the bottom surface 2 ⁇ / b> B side of the battery case 2, that is, a portion on the upper opening side of the battery case 2.
- a through hole 6 ⁇ / b> C having one end opened on the side surface side of the electrode group 3 and the other end opened on the inner peripheral surface 2 ⁇ / b>
- a side of the battery case 2 is formed in the upper portion of one spacer 61.
- the through hole 6C is formed in one spacer 61 at a portion corresponding to the current collecting terminal 321 of the negative electrode plate 32.
- One end opens to the electrode contact surface 6x that contacts the side surface of the electrode group 3, and the other end Is open to the case contact surface 6y that contacts the inner peripheral surface 2A of the battery case 2.
- the through-hole 6C of the present embodiment has a substantially equal cross-sectional shape formed so as to extend along the stacking direction L, has a substantially rectangular cross-sectional shape, and its width dimension is the width dimension of the current collecting terminal 321.
- the height dimension is slightly larger than the thickness dimension of the current collecting terminal 321.
- the current collecting terminal 321 of the negative electrode plate 32 extends to the inner peripheral surface 2A of the battery case 2 through the through hole 6C.
- the current collection terminal 321 inserted in this through-hole 6C is extended from the outer surface of the spacer 61, and between the case contact surface 6y which is the outer surface of the said spacer 61, and the inner peripheral surface 2A of the battery case 2.
- a free end portion extending above the upper surface 6 u of the spacer 61 is welded to the inner peripheral surface 2 ⁇ / b> A of the battery case 2.
- the electrode group 3 constituted by the electrode plate unit is sandwiched between the pair of spacers 61 and 62 from the stacking direction L. At this time, the current collecting terminal 321 of the negative electrode plate 32 is passed through the through hole 6 ⁇ / b> C formed in one spacer 61. The structure thus formed is placed in the battery case 2 (see FIG. 27). Note that the current collecting terminal 321 of the negative electrode plate 32 extends upward from the upper surface 6 u of the spacer 61 in the arranged state.
- the current collecting terminal 321 of the negative electrode plate 32 is welded and connected to the inner peripheral surface 2 ⁇ / b> A of the battery case 2. Thereafter, an electrolytic solution is injected into the battery case 2.
- the current collecting terminal 311 of the positive electrode plate 31 is connected to the back surface of the sealing body 5 directly or via a current collecting plate (not shown), and the sealing body 5 is connected to the upper opening of the battery case 2 via the insulator 4. Secure by caulking.
- both the current collecting terminal 321 of the negative electrode plate 32 and the current collecting terminal 311 of the positive electrode plate 31 are located on the upper opening side of the battery case 2, welding work can be easily performed.
- the current collecting terminal 321 of the negative electrode plate 32 extends to the inner peripheral surface 2A of the battery case 2 above the spacers 61 and 62.
- the workability of the work of connecting the electrical terminal 321 to the inner peripheral surface 2A of the battery case 2 by welding or the like can be improved, and the productivity of the battery can be improved.
- the current collecting terminal 311 that is not connected to the inner peripheral surface 2 ⁇ / b> A of the battery case 2 is connected to the sealing body 5 that seals the upper opening of the battery case 2.
- the present invention is not limited to the fifth embodiment.
- the current collecting terminal 321 of the negative electrode plate 32 may be configured to extend to the inner peripheral surface 2 ⁇ / b> A of the battery case 2 along the upper surface 6 u of one of the spacers 61 and 62.
- the current collecting terminal 321 of the negative electrode plate 32 is provided on the inner peripheral surface 2A of the battery case 2 as shown in FIGS. It is preferable to provide a guide groove 6M for guiding.
- the guide groove 6M extends in the direction in which the current collecting terminal 321 extends from the surface (electrode contact surface 6x) in contact with the electrode group 3 to the surface (case contact surface 6y) in contact with the inner peripheral surface 2A of the battery case 2 (see FIG. In FIG. 29, it is formed along the stacking direction L), and the width of the guide groove 6M is slightly larger than the width dimension of the current collecting terminal 321.
- the depth of the guide groove 6M may be any depth that allows the current collecting terminal 321 to be positioned.
- the current collecting terminal 321 is guided to the inner peripheral surface 2A of the battery case 2 by contacting at least the bottom surface of the guide groove 6M.
- a notch 6K for securing a space where the current collecting terminal 321 extends to the inner peripheral surface 2A of the battery case 2 is formed. It may be.
- the current collecting terminal 321 is connected to one end portion in the width direction of the negative electrode plate 32, and the cutout portion 6 ⁇ / b> K is also formed at one end portion in the width direction of the spacers 61 and 62 corresponding to this. .
- the through hole 6C or the guide groove 6M is formed in the spacers 61 and 62 correspondingly. It is formed.
- the spacers 61 and 62 in the above embodiment have a substantially semicircular cross section formed of a planar electrode contact surface 6x and an arcuate case contact surface 6y. If it is a shape which has the case contact surface 6y and fixes the electrode group 3 to the battery case 2, it can be set as various shapes.
- the current collection terminal of a negative electrode plate is welded and connected to the inner peripheral surface of a battery case, it welds by pinching between the outer surface of a spacer and the inner peripheral surface of a battery case. It may be electrically connected without any problem.
- the current collecting terminal of the negative electrode plate is connected to the negative electrode plate by welding or the like, but it may be provided by being integrally formed with the negative electrode current collector of the negative electrode plate.
- the cylindrical battery 100 according to the sixth embodiment is different from the first embodiment in the configuration of the negative electrode plate 32, and the method for electrically connecting the current collecting terminal 321 of the negative electrode plate 32 and the battery case 2. Is different.
- the negative electrode plate 32 sandwiches a linear active material non-holding portion (uncoated portion) 32A that does not hold the negative electrode active material and the active material non-holding portion 32A. And an active material holding part (coating part) 32B for holding the negative electrode active material.
- the active material non-holding portion 32A is formed symmetrically so as to include the center line H of the negative electrode current collector, and the active material holding portion 32B is symmetrical with respect to the active material non-holding portion 32A (see FIG. 33).
- the negative electrode plate 32 has a negative electrode current collector bent in a substantially U shape at the active material non-holding portion 32A so that the active material holding portions 32B on both sides face each other. Specifically, the active material non-holding part 32A and the active material holding part 32B are bent so that the active material non-holding part 32A and the active material holding part 32B are at right angles to each other with a fold line slightly inside the boundary between the active material non-holding part 32A and the active material holding part 32B. ing.
- the negative electrode plate 32 is formed with a current collecting terminal 321 that contacts the inner surface of the battery case 2 by bending a part of the active material non-holding portion 32A outward.
- a cut 32C is formed in a part of the active material non-holding portion 32A so as to have a desired current collecting terminal shape, and the inside of the cut 32C is bent outward to collect the current. Electrical terminals 321 are formed.
- both the notch start point a and the notch end point b are located on the side of the active material non-holding portion 32A, and the notch line c connecting the notch starting point a and the notch end point b is the active material non-holding portion. It is formed in 32A.
- the cut line c has a generally U shape in plan view.
- the current collecting terminal 321 formed inside the notch 32C is bent by the notch 32C and is inclined outward from the side portion of the active material non-holding portion 32A.
- the plane direction of the active material non-holding portion 32A and the plane direction of the current collecting terminal 321 are substantially the same direction, and the active material non-holding portion 32A and the current collecting terminal 321 are positioned in substantially the same plane.
- the active material non-holding portion 32A can be brought into contact with the bottom surface 2B of the battery case 2 while the negative electrode plate 32 is accommodated in the battery case 2, and the current collecting terminal 321 is brought into contact with the bottom surface 2B of the battery case 2. Can be contacted.
- the planar active material non-holding portion 32A can be arranged so as to contact the bottom surface 2B of the battery case 2, and the space in the battery case 2 can be used effectively.
- the current collector terminal 321 is configured to extend from the side portion of the active material non-holding portion 32A so as to extend from the side portion at the cut start point a and the distance from the side portion at the cut end point b. And are made different from each other.
- the distance from the side of the notch start point a is shorter than the distance from the side of the notch end point b, so that the folding line d connecting the notch start point a and the notch end point b is on the side.
- the current collecting terminal 321 is bent with respect to the side of the active material non-holding portion 32A by bending the inside of the cut 32C outward based on the cut start point a and the cut end point b. Inclined and extends outward.
- the manufacturing method of the negative electrode plate 32 configured in this way is as follows. First, as shown in FIG. 34, a negative electrode active material is applied to both sides of a base material X having a long shape, leaving a straight uncoated region X1 at the center along the longitudinal direction. To form coating areas X2 and X3. And it cut
- a cut 32C is formed in the uncoated portion 32A of the cut negative electrode plate 32, and the negative electrode plate 32 is bent into a substantially U shape and the current collecting terminal 321 is bent outward. The cut 32C may be formed before the negative electrode plate 32 is cut.
- the current collecting terminal 321 of the negative electrode plate 32 is pressed against both the bottom surface 2B and the inner peripheral surface 2A of the battery case 2 by the spacer 6. It is in contact.
- the current collecting terminal 321 extending obliquely from the side portion of the active material non-holding portion 32A in the negative electrode plate 32 is the outer surface of the spacer 61 (in FIG. 36, the outer corner portion 6Ax of the electrode contact portion 6A). Is pressed against and contacts the inner peripheral surface 2A of the battery case 2. Further, the current collecting terminal 321 is pressed against and contacts the bottom surface 2B of the battery case 2 by the lower surface of the spacer 61 (the lower surface 6Ay of the electrode contact portion 6A in FIGS. 35 and 37).
- the current collecting terminal 321 of the negative electrode plate 32 is in contact with the bottom surface 2B and the inner peripheral surface 2A of the battery case 2 without being welded, and the spacer 61 Is pressed against the bottom surface 2B and the inner peripheral surface 2A, so that the operation of welding the current collecting terminal 321 to the battery case 2 is unnecessary, and the current collecting terminals 321 and 62 are simply inserted into the battery case 2. Since the battery case 2 can be brought into contact, the number of manufacturing steps can be reduced.
- the current collecting terminal 321 is pressed against the battery case 2 by the spacer 61, it is possible to maintain good electrical connection between the current collecting terminal 321 and the battery case 2, and to collect the current collecting terminal 321 and the battery.
- the resistance between the case 2 and the case 2 can be made as small as possible.
- the present invention is not limited to the sixth embodiment.
- the current collecting terminal 321 of the negative electrode plate 32 is integrally formed.
- another current collecting terminal may be welded to the negative electrode plate 32 and integrated. .
- the negative electrode plate 32 is configured by applying a negative electrode active material to a negative electrode current collector, and connects the two flat plate portions 32L and 32M facing each other and the flat plate portions 32L and 32M. It is generally U-shaped having a bent portion 32N.
- the positive electrode plate 31 is sandwiched between the two flat plate portions 32L and 32M via the separator 33.
- the two flat plate portions 32L and 32M have an active material non-retaining portion (non-retaining portion) in which the side active portion (longitudinal side portion) along the central axis direction C is not coated with the negative electrode active material.
- Coating portion) 32Z, and the active material non-holding portion 32Z serves as a current collecting terminal 321. That is, the entire long side portions of the two flat plate portions 32L and 32M serve as a current collecting terminal 321, and the entire long side portions of the two flat plate portions 32L and 32M are arranged on the inner peripheral surface of the battery case 2 in the central axial direction C. Will be touching along.
- the current collecting terminal 321 formed on one flat plate portion 32L is pressed and brought into contact with the inner peripheral surface 2A of the battery case 2 by the spacer 61 contacting the flat plate portion 32L, and the other flat plate portion 32M.
- the longitudinal side portion of the current collecting terminal 321 of the negative electrode plate 32 is pressed and brought into contact with the inner peripheral surface 2A of the battery case 2 along the central axis direction C by the spacer 61 over the entire central axis direction C. ing.
- the current collecting terminal 321 formed on the other flat plate portion 32M may be pressed into contact with the inner peripheral surface 2A of the battery case 2 by the spacer 62 that contacts the flat plate portion 32M.
- the manufacturing method of the negative electrode plate 32 configured in this way is as follows. First, as shown in FIG. 42, an uncoated region X1 and a coated region X2 are formed in a stripe shape along the longitudinal direction of a base material X having a long shape. And it cut
- FIG. In FIG. 42 a bold line indicates a cutting line. Then, the negative electrode plate 32 is bent into a substantially U shape. Since manufacturing is performed in this manner, the active material non-holding portion 32Z is formed also on the side portion of the bent portion 32N.
- a current collecting terminal 321 may be provided on either one of the flat plate portions 32L or 32M. If it is this, the usage-amount of a base material can be reduced.
- the current collecting terminals 321 of the two flat plate portions may be formed on different side portions.
- the cylindrical battery according to each of the embodiments includes the liquid retaining member 7 that holds the electrolytic solution so as to supply the electrolytic solution to the separator 33 of the electrode group 3.
- the liquid retaining member 7 is disposed in the battery case 2 between the battery case 2 and the electrode group 3, and is formed of the same material as the separator 33 (for example, a nonwoven fabric made of polyolefin).
- the liquid retaining member 7 covers the entire four side surfaces 3a to 3d parallel to the central axis direction C of the battery case 2 in the electrode group 3, as shown in FIG.
- the electrode group 3 has a bag shape covering the four side surfaces 3a to 3d (see FIG. 45) and the lower surface 3e (see FIG. 44).
- the separator 33 of the present embodiment accommodates the positive electrode plate 31, and is positioned on the outer surface so as to cover the short side surface of the positive electrode plate 31 on the side surfaces 3 c and 3 d parallel to the stacking direction L of the electrode group 3. (See FIG. 45).
- the separator 33 and the liquid retaining member 7 come into contact with each other on the short side surface of the positive electrode plate 31. Because of such contact, the electrolytic solution of the liquid retaining member 7 can be efficiently supplied to the separator 33.
- the spacers 61 and 62 are disposed on substantially the entire portion of the liquid retaining member 7 that contacts the outer surfaces 3 a and 3 b of the electrode group 3. By contacting, the outer surfaces 3a and 3b of the electrode group 3 are pressed. Thereby, the liquid retaining member 7 is sandwiched and fixed between the electrode group 3 and the spacers 61 and 62. With this configuration, the electrode group 3 and the liquid retaining member 7 can be fixed by the common spacers 61 and 62, and the configuration in the battery case 2 can be simplified.
- the liquid retaining member 7 since the liquid retaining member 7 is provided in contact with the separator 33 of the electrode group 3, the separator of the electrode group 3 is separated from the liquid retaining member 7. Since the electrolytic solution can be supplied to 33 and the electrolytic solution retained in the separator 33 can be sufficiently maintained, an increase in internal resistance of the electrode group 3 can be suppressed. At this time, since it is not necessary to increase the thickness of the separator 33 in the electrode group 3, the discharge performance of the electrode group 3 does not deteriorate. Further, the liquid retaining member 7 has a bag shape for accommodating the electrode group 3, and the negative electrode active material can be prevented from dropping off from the negative electrode plate 32. In particular, it is possible to prevent the negative electrode active material from falling off on the side surface (short side surface) parallel to the stacking direction L of the negative electrode plate 32.
- the electrode group 3 and the liquid retaining member 7 are fixed using the spacers 61 and 62, rattling of the electrode group 3 and the liquid retaining member 7 with respect to the battery case 2 is prevented, and the positive electrode plate 31 and the negative electrode It is possible to prevent the active material from falling off the plate 32 to prevent the charge / discharge performance from being deteriorated, to improve the charge / discharge performance, and to ensure the contact between the electrode group 3 and the liquid retaining member 7.
- the present invention is not limited to the eighth embodiment.
- the liquid retaining member 7 has a bag shape and accommodates the electrode group 3, but the shape of the liquid retaining member 7 is not limited thereto.
- the liquid retaining member 7 may have a substantially cylindrical shape and cover the four side surfaces 3 a to 3 d of the electrode group 3.
- the liquid retaining member 7 is not interposed between the spacers 61 and 62 and the electrode group 3, but the outer surfaces 3a and 3b of the electrode group 3 in the stacking direction L, not the stacking direction L.
- the liquid retaining member 7 may be provided so as to be in contact with the side surfaces 3c and 3d which are parallel to each other. At this time, the liquid retaining member 7 may be provided so as to fill a space formed between the electrode group 3 and the spacers 61 and 62 and the battery case 2.
- separator 33 and the liquid retaining member 7 are formed from the same material in the eighth embodiment, they may be formed from different materials.
- the cylindrical battery 100 according to the ninth embodiment is different from the above embodiments in the configuration of the positive electrode plate or the negative electrode plate. Below, the case where the structure of a positive electrode plate differs is demonstrated.
- the positive electrode plate 31 includes, as shown in FIGS. 48 to 50, one first electrode plate element 31A having a current collecting terminal 311 and one or more second electrode plates having no current collecting terminal 311. It has an element 31B, and forms a substantially straight state shape formed by contacting and laminating these electrode plate elements 31A and 31B.
- the first electrode plate element 31A and the second electrode plate element 31B are configured by, for example, filling a foamable metal porous body (positive electrode base material) such as foamed nickel with a positive electrode active material, and the first electrode plate element 31A.
- a foamable metal porous body positive electrode base material
- the positive electrode base material and the positive electrode base material of the second electrode plate element 31B have substantially the same shape and substantially the same thickness in plan view.
- the positive electrode plate 31 of the present embodiment is composed of one first electrode plate element 31A and two second electrode plate elements 31B, one on each side of the first electrode plate element 31A.
- the bipolar plate element 31B is arranged and laminated. That is, the same number of second electrode plate elements 31 ⁇ / b> B are stacked on both surfaces of the first electrode plate element 31 ⁇ / b> A, and the first electrode plate elements 31 ⁇ / b> A are stacked so as to be centered on the positive electrode plate 31.
- the first electrode plate element 31A in the center of the positive electrode plate 31, the current collection efficiency of each second electrode plate element 31B is improved.
- the first electrode plate element 31A is formed with an active material removing portion 31Ax having a substantially rectangular shape for welding the current collecting terminal 311 at the central portion at the upper end portion thereof. Yes.
- the active material removing portion 31Ax is slightly larger than the welded portion of the current collecting terminal 311 and is formed by removing the positive electrode active material filled in the positive electrode base material. And a part of active material removal part 31Ax is compressed according to the shape of the current collection terminal 311, and the current collection terminal 311 is welded to the said compression part.
- the positive electrode base material or positive electrode active material of the first electrode plate element 31A of the positive electrode plate 31 and the positive electrode base material or positive electrode active material of the second electrode plate element 31B are in press contact with each other, and the conductivity of the first electrode plate element 31A and the second electrode plate element 31B is improved. Since the first electrode plate element 31A and the second electrode plate element 31B are in press contact as described above, the current collecting terminal 311 of the first electrode plate element 31A efficiently collects the current from the second electrode plate element 31B. It becomes possible to take.
- the positive electrode plate 31 is divided into the first electrode plate element 31A and the second electrode plate element 31B, whereby the current collecting terminal 311 is provided.
- the thickness of the electrode plate element 31A can be made as thin as possible, and the amount of the positive electrode active material removed in the first electrode plate element 31A can be reduced.
- the second electrode plate element 31B it is not necessary to remove the positive electrode active material.
- the loss of a positive electrode active material can be decreased, and the filling property of the positive electrode active material as the whole positive electrode plate can be improved. it can.
- the current collecting terminal 311 need only be welded to the first electrode plate element 31A, and it is not necessary to weld an extra current collecting terminal, so that productivity can be improved.
- the spacers 61 and 62 sandwich the electrode group 3 from the stacking direction L, the electrode group 3 is pressed, so that the first electrode plate element 31A and the second electrode plate element 31B are in sufficient press contact. Therefore, sufficient conductivity can be obtained.
- the positive electrode plate 31 using the foamed nickel is divided into the first electrode plate element 31A and the second electrode plate element 31B, the thickness of the first electrode plate element 31A from which the positive electrode active material is removed can be reduced. And the volume of the active material removing portion 31Ax can be reduced. Thereby, the shear strain generated between the portion to be compressed and the portion not to be compressed can be reduced while reducing the loss of the positive electrode active material.
- the first electrode plate element 31A and the second electrode plate element 31B have the same thickness. However, as shown in FIG. The thickness of the second electrode plate element 31B may be different, or the thickness may be different for each second electrode plate element 31B.
- a plurality of positive electrode plate units 31U configured by laminating two or more second electrode plate elements 31B with respect to one first electrode plate element 31A are used.
- the plate unit 31U may be laminated. If it is this, the current collection efficiency as the whole positive electrode plate 31 can be improved, reducing the loss of the positive electrode active material as much as possible for each unit 31U.
- the positive electrode plate is divided into the first electrode plate element and the second electrode plate element.
- the negative electrode plate may be divided into the first electrode plate element and the second electrode plate element. good.
- the cylindrical battery 100 according to the tenth embodiment is different from the above embodiments in the configuration of the positive electrode 31 and the configuration of the spacer 6.
- the positive electrode 31 is provided with a current collecting terminal 311 made of, for example, a nickel steel plate or the like on the upper surface thereof by welding.
- the current collecting terminal 311 extends outward in one of the longitudinal directions (width directions) on the upper surface 31 e of the positive electrode 31.
- the current collecting terminal 311 is provided over substantially the entire upper surface 31 e of the positive electrode 31 in order to improve the efficiency of collecting current from the positive electrode base material.
- the positive electrode 31 may be a positive electrode base material having a substantially rectangular parallelepiped shape filled with a positive electrode active material, or a plate-shaped positive electrode base material filled with a positive electrode active material may be laminated or bent. It may be a thing.
- the spacer 6 is a rectangle having a contact surface on one surface 6a that contacts substantially the entire outermost surface (specifically, the negative electrode plate 32) in the stacking direction L of the electrode group 3.
- the plate-shaped electrode contact portion 6A and an equal cross-sectional shape having two case contact portions 6B extending from the other surface 6b of the electrode contact portion 6A and contacting the inner peripheral surface 2A of the battery case 2 are formed. .
- the electrode contact portion 6 ⁇ / b> A has a shape along the outermost surface in the stacking direction L of the electrode group 3.
- a protruding piece 6T that faces the upper surface of the electrode group 3 is formed on the electrode contact portion 6A.
- the protruding piece 6T extends substantially vertically from the electrode contact portion 6A at the center of the upper end of the electrode contact portion 6A (see FIG. 56).
- an enclosing wall portion 6P surrounding the upper corner portion of the electrode group 3 is formed at the upper corner portion of the electrode contact portion 6A.
- the surrounding wall portion 6P includes an upper wall 6P1 that faces the upper surface of the electrode group 3 and a side wall 6P2 that faces the left and right side surfaces of the electrode group 3 (see FIG. 56).
- the two case contact portions 6B are formed in parallel with each other along the central axis direction C on the other surface 6b of the electrode contact portion 6A.
- the battery case 2 is formed symmetrically so as to sandwich the central axis of the battery case 2 in a state of being accommodated in the battery case 2.
- the contact portion of the case contact portion 6 ⁇ / b> B with the inner peripheral surface 2 ⁇ / b> A of the battery case 2 has a curved surface that is substantially the same as the curved surface of the inner peripheral surface 2 ⁇ / b> A of the battery case 2.
- the case contact portion 6B and the battery case 2 are configured to be in surface contact (see FIG. 57).
- the current collecting terminal 311 of the positive electrode plate 31 is contacted or projected by the protruding pieces 6T of the two spacers 6 as shown in FIG. Pressed.
- the free end portion side of the current collecting terminal 311 is bent with respect to the protruding piece 6T and welded to the sealing body 5.
- the rising position of the current collecting terminal 311 is in the vicinity of the protruding piece 6T.
- the upper corner portions of the positive electrode plate 31 and the negative electrode plate 32 are accommodated by the surrounding wall portions 6P of the two spacers 6.
- a gap may be formed between the spacer 6 and the inner peripheral surface of the battery case 2.
- the spacer 6 is formed by rounding the corner of the bottom of the electrode contact portion 6A to form an R portion, and rounding the corner of the bottom of the case contact portion to form R. Forming part.
- the case contact portion 6 ⁇ / b> B may have a configuration in which the height dimension becomes smaller toward the bottom surface side of the battery case 2.
- one or more holes penetrating in the thickness direction may be formed in the spacer.
- the spacer having the configuration of the tenth embodiment it is conceivable to provide a hole in the electrode contact portion 6A.
- one or a plurality of grooves that open up and down are formed on one surface 6a of the electrode contact portion 6A of the spacer 6. It is conceivable to emboss the electrode contact portion 6a in the spacer.
- the spacer 6 may have conductivity, and may act as a terminal for electrically connecting the outermost electrode in the electrode group and the battery case.
- the present invention can be applied to secondary batteries such as lithium ion secondary batteries in addition to alkaline storage batteries, or may be applied to primary batteries.
- the battery not only is the battery not only resistant to an increase in the internal pressure of the battery, but also a battery that does not need to consider the winding deviation of the electrode group, and it is possible to prevent the electrode group from rattling with respect to the battery case. It is possible to prevent the active material from falling off and prevent deterioration of charge / discharge performance.
Abstract
Description
さらに、円筒形の電池ケースに互いに対向する一対の外側面が平面状をなす電極群を収容する場合には、電池ケースに対して電極群ががたついてしまい極板の活物質が脱落して充放電性能が劣化してしまう恐れがあるが、スペーサを電池ケースの内側周面と電極群の平面状をなす外側面との間に設けることによって、電池ケースに対する電極群のがたつきを防止することができ、極板の活物質の脱落を抑制して充放電性能の劣化を防ぐことができる。
以下に本発明に係る円筒形電池の第1実施形態について図面を参照して説明する。
このように構成した第1実施形態に係るアルカリ蓄電池100によれば、正極板31及び負極板32をセパレータ33を介して積層した電極群3を電池ケース2内に収容することから、電極群3の巻きずれ及び巻きずれに付随する種々の問題の無い電池を提供することができる。また、円筒状の電池ケース2であることから、内部圧力の上昇に対して強度的に強くすることができる。
なお、本発明は前記第1実施形態に限られるものではない。例えば、前記実施形態ではスペーサ61、62に設けた挿入孔6Hによって溶接スペースを確保するものであったが、図8に示すように、スペーサ61、62に挿入孔6Hを設けることなくスペーサ61、62の外観形状により溶接スペースを形成しても良い。具体的には、側面に凹部6Sを有する中心軸方向Cに等断面形状をなすものとすることが考えられる。図8においては、電極群3の積層方向最外側の面に接触する電極接触部6Aと、電池ケース2の内側周面に接触する1又は複数のケース接触部6Bと、それらの間に形成された凹部6Sとを有するものである。このようなものであっても、スペーサ61、62を挿入した後にスペーサ61、62の凹部6Sにより形成される溶接スペースによって負極板32の集電端子321を電池ケース2の底面2Bに溶接することができる。
次に本発明に係る円筒形電池の第2実施形態について図面を参照して説明する。なお、前記第1実施形態に対応する部材には同一の符号を付している。
このように構成した第1実施形態に係るアルカリ蓄電池100によれば、電極接触部61A、62Aの接触面61a、62aが、横断面視において当該接触面61a、62aの幅方向両端部がその幅方向中央部よりも一方面側前方に位置するように凹状に湾曲しているので、電極群3をスペーサ61、62で積層方向Lから押さえた場合に、その幅方向両端部の弾性変形による復帰力が電極群の幅方向両端部に加わることになる。これにより、押圧が弱くなりがちな電極群3の幅方向両端部を確実に押圧することができ、充放電効率を向上させることができる。
なお、本発明は前記第2実施形態に限られるものではない。例えば、前記第2実施形態では、接触面61a、62aを凹状に湾曲させたものであったが、図17(A)に示すように凹状に屈曲させたものであっても良い。この場合であっても、電極群3の幅方向中央部はケース接触部61B、62Bから作用力によって確実に押圧させることができるとともに、電極群3の幅方向両端部を確実に押圧させることができる。なお、図17(A)では、第1のスペーサ61について示している。
次に本発明に係る円筒形電池の第3実施形態について図面を参照して説明する。なお、前記第2実施形態に対応する部材には同一の符号を付している。
このように構成した第3実施形態に係る円筒形電池100によれば、前記実施形態の効果に述べた一対のスペーサ61、62を設けることによる効果に加えて、電極群3の厚みが作製上のばらつき等により薄くなった場合において、ケース接触部61B、62Bにより電極接触部61A、62Aを十分に電極群3に加圧できない場合であっても、他方面61b、62bの幅方向両端部が電池ケース2の内側周面2Aに接触することから、電極接触部61A、62Aにより電極群3を確実に押圧でき、充放電効率を向上させることができる。つまり、他方面61b、62bの幅方向両端部が電池ケース2の内側周面2Aに接触することにより、一方面61a、62aの幅方向中央部が電極群3側に押圧されることになり、当該一方面61a、62aの幅方向中央部により確実に電極群を押圧することができる。
なお、本発明は前記第3実施形態に限られるものではない。例えば、前記第2実施形態では、電極接触部61A、62Aが凸状に反った形状とされることにより、接触面61a、62aが凸状に湾曲(他方面61b、62bが凹状に湾曲)したものとされているのが、図19(A)に示すように、電極接触部61A、62Aを反った形状とすることなく、接触面61a、62aを平坦面にするとともに他方面61b、62bを凹状に湾曲させたものとしても良い。この場合であっても、前記第2実施形態と同様の効果を奏する。なお、図19(A)では、第1のスペーサ61について示している。
次に本発明に係る円筒形電池の第4実施形態について図面を参照して説明する。なお、前記各実施形態に対応する部材には同一の符号を付している。
このように構成した第4実施形態に係るアルカリ蓄電池100によれば、対のスペーサ61、62が電極群3を電池ケース2の中心位置H1から偏心した位置に固定するので、円筒形電池100を倒した状態において比重の大きい電極群3の中心位置H2が電池ケース2の中心位置H1よりも鉛直下側に位置することになり、電解液と電極群3との接触面積を大きくすることができる。これにより、電槽化成時における電極群3内部への電解液の浸透を容易にすることができる。
例えば、スペーサ形状は前記第4実施形態に限られず、図22に示すように、第2のスペーサ62が溶接孔62hを有さないものであっても良い。この場合には、負極板32の集電端子321は、スペーサ61、62を電池ケース2に配置する前に溶接するか、或いは、溶接することなく、第2のスペーサ62の下面により電池ケース2の底面2Bに押圧接触させることが考えられる。
次に本発明に係る円筒形電池の第5実施形態について図面を参照して説明する。なお、前記各実施形態に対応する部材には同一の符号を付している。
このように構成した第5実施形態に係るアルカリ蓄電池100によれば、負極板32の集電端子321が、スペーサ61、62の上部において電池ケース2の内側周面2Aに延びているので、集電端子321を電池ケース2の内側周面2Aに溶接等によって接続する作業の作業性を向上させることができ、電池の生産性を向上させることができる。なお、電池ケース2の内側周面2Aに接続されない集電端子311は、電池ケース2の上部開口を封止する封口体5に接続される。このように正極板31の集電端子311及び負極板32の集電端子321を、電池ケース2の底面2Bに接続する必要が無く、電池の生産性を向上させることができる。
なお、本発明は前記第5実施形態に限られるものではない。例えば、図28に示すように、負極板32の集電端子321が、一方のスペーサ61、62の上面6uに沿って電池ケース2の内側周面2Aに延びるように構成しても良い。
次に本発明に係る円筒形電池の第6実施形態について図面を参照して説明する。なお、前記各実施形態に対応する部材には同一の符号を付している。
このように構成した第6実施形態に係るアルカリ蓄電池100によれば、負極板32の集電端子321が、電池ケース2の底面2B及び内側周面2Aに溶接されることなく接触し、スペーサ61により底面2B及び内側周面2Aに押圧されているので、集電端子321を電池ケース2に溶接する作業を不要にし、スペーサ61、62を電池ケース2に挿入するだけで、集電端子321と電池ケース2とを接触させることができるので、製造工数を削減することができる。また、集電端子321がスペーサ61により電池ケース2に押圧されていることから、集電端子321と電池ケース2との電気的な接続を良好に保つことができるとともに、集電端子321と電池ケース2との間の抵抗を可及的に小さくすることができる。
なお、本発明は前記第6実施形態に限られるものではない。例えば、前記第6実施形態では、負極板32の集電端子321を一体形成したものであったが、負極板32に別部品の集電端子を溶接して一体化するものであっても良い。
前記第6実施形態では、集電端子が折り曲げ部から外側に延びるように設けられているが、活物質保持部32B(平板部)から外側に延びるように設けても良い。
このように構成した第7実施形態に係るアルカリ蓄電池100によれば、負極板32が、電池ケース2の内側周面2Aに接触していることから、電極群3が電池ケース2に中心軸方向Cにずれたとしても、電池ケース2との接触を保つことができ、電気的な接続を良好に保つことができる。
前記各実施形態の円筒形電池において、図44及び図45に示すように、電極群3のセパレータ33に電解液を供給すべく電解液を保持する保液部材7を有する。
このように構成した第8実施形態に係るアルカリ蓄電池100によれば、保液部材7を電極群3のセパレータ33に接触して設けていることから、当該保液部材7から電極群3のセパレータ33に電解液を供給することができ、セパレータ33に保持される電解液を十分に保つことができるので、電極群3の内部抵抗の上昇を抑制することができる。このとき、電極群3内のセパレータ33を厚くする必要が無いため、電極群3の放電性能が低下することはない。また、保液部材7が電極群3を収容する袋状をなすものであり、負極板32から負極活物質が脱落することを防止することもできる。特に負極板32における積層方向Lに平行な側面(短手側面)における負極活物質の脱落を防止することができる。
なお、本発明は前記第8実施形態に限られるものではない。例えば、前記第8実施形態では、保液部材7が袋状をなしており電極群3を収容するものであったが、保液部材7の形状はこれに限られない。例えば、保液部材7が、概略筒形状をなしており電極群3の4つの側面3a~3dを覆うものであっても良い。
次に本発明に係る円筒形電池の第9実施形態について図面を参照して説明する。なお、前記各実施形態に対応する部材には同一の符号を付している。
このように構成した第9実施形態に係るアルカリ蓄電池100によれば、正極板31を第1極板要素31A及び第2極板要素31Bに分割することで、集電端子311が設けられる第1極板要素31Aの厚みを可及的に薄くすることができ、第1極板要素31Aにおいて除去される正極活物質量を少なくすることができる。一方、第2極板要素31Bにおいては正極活物質を除去する必要が無い。このように第1極板要素31A及び第2極板要素31Bに分割することで、正極活物質のロスを少なくすることができ、正極板全体としての正極活物質の充填性を向上させることができる。その上、集電端子311は第1極板要素31Aにのみ溶接すればよく、余分な集電端子を溶接する必要が無いため、生産性を向上させることもできる。加えて、スペーサ61、62が積層方向Lから電極群3を挟むことから、電極群3に押圧がかかるため、第1極板要素31A及び第2極板要素31Bが十分に押圧接触することになり、十分な導電性を取ることができる。
例えば、前記第9実施形態では、1つの第1極板要素31Aに対して2つの第2極板要素31Bを積層した例を示したが、図52(A)に示すように、1つの第1極板要素31Aの両面にそれぞれ2つ以上の第2極板要素31Bを積層して構成しても良い。
次に本発明に係る円筒形電池の第10実施形態について図面を参照して説明する。なお、前記各実施形態に対応する部材には同一の符号を付している。
このように構成した第10実施形態に係るアルカリ蓄電池100によれば、電極群3の上面に対向する突起片6Tが設けられているので、正極31の上面に溶接された集電端子311に突起片6Tが接触するため、集電端子311の位置ずれを防止できるとともに、集電端子311の溶接箇所が破断して剥がれてしまうことを防止できる。また、スペーサ6の上部に、電極群3の上角部を囲む囲み壁部6Pが設けられているので、電池ケース2と正極31とが接触してしまうことを防止することができる。また、正極31の集電端子311と負極32との接触を防止することができる。さらに、電極群3における正極31及び負極32のずれを防止することもできる。その上、囲み壁部6Pを設けることで、従来必須とされていた上部絶縁板を配置する必要が無くなり、製造工程を簡略化できるとともに材料コストを削減することができる。
なお、本発明は前記第10実施形態に限られるものではない。例えば、スペーサ6と電池ケース2の内側周面との間にすき間を形成するようにしても良い。具体的には、電池ケース2の底部側においてすき間を設けることが望ましい。スペーサ6の構成としては、図58に示すように、電極接触部6Aの底部の角に角丸加工を施してR部を形成し、ケース接触部の底部の角に角丸加工を施してR部を形成する。このように、スペーサ6及び電池ケース2の内側周面の間にすき間を設けることによって、電極群3への電解液の移動を容易にすることができる。その他、ケース接触部6Bにおいて電池ケース2の底面側に行くに従って高さ寸法が小さくなる構成も考えられる。
Claims (39)
- 円筒状をなす電池ケースと、
前記電池ケース内に配置され、正極、負極及びセパレータから構成されており、互いに対向する一対の外側面が平面状をなす電極群と、
前記電池ケースの内側周面と前記電極群の平面状をなす外側面との間に設けられたスペーサとを備える円筒形電池。 - 請求項1記載の円筒形電池が、二次電池であり、
前記正極又は負極が、集電基材と活物質とを備える円筒形電池。 - 前記スペーサが前記電極群を押圧するものである請求項1記載の円筒形電池。
- 前記電極群が、正極板及び負極板をセパレータを介して積層した形状をなすものであり、
前記電極群が、その積層方向が前記電池ケースの中心軸方向と直交するように前記電池ケースに収容されており、
前記スペーサが、前記電極群をその積層方向から挟むように2つ以上設けられている請求項1記載の円筒形電池。 - 前記スペーサが、前記電極群の積層方向最外側の面の略全体に接触する請求項4記載の円筒形電池。
- 前記スペーサが、前記電池ケースと中心軸方向に沿った少なくとも4辺で接触する請求項4記載の円筒形電池。
- 前記スペーサが、前記電池ケースと中心軸方向に沿った少なくとも6辺で接触する請求項4記載の円筒形電池。
- 前記電池ケースの内側周面に接触する前記スペーサの接触部が、前記電池ケースの内側周面の曲面に沿った曲面を有する請求項1記載の円筒形電池。
- 前記スペーサが、前記電極群を前記電池ケースに溶接するための溶接棒が挿入される上下に連通した空間を形成するものである請求項1記載の円筒形電池。
- 前記スペーサが、前記電池ケースの内側周面と前記一対の外側面それぞれとの間に設けられており、
前記各スペーサが、前記電極群に接触する接触面を一方面に有する平板状の電極接触部と、当該電極接触部の他方面から延出して前記電池ケースの内側周面に接触するケース接触部とを有する請求項1記載の円筒形電池。 - 前記電極群に接触しない状態における前記電極接触部の接触面が、上面視において当該接触面の幅方向両端部がその幅方向中央部よりも一方面側前方に位置するように凹状に湾曲又は屈曲している請求項10記載の円筒形電池。
- 前記スペーサが、前記電極接触部の幅方向両端部がその幅方向中央部よりも一方面側前方となるように反った形状とされることにより、前記接触面が凹状に湾曲又は屈曲している請求項10記載の円筒形電池。
- 前記電池ケース内に前記電極群及び前記スペーサを配置した状態において、前記スペーサの電極接触部における他方面の幅方向両端部が、前記電池ケースの内側周面に接触している請求項10記載の円筒形電池。
- 前記スペーサが前記電池ケースに配置される前の状態において、前記電極接触部の幅方向両端部がその幅方向中央部よりも他方面側に位置するように反った形状であり、
前記電池ケース内に前記電極群及び前記スペーサを配置した状態において、前記スペーサの電極接触部における他方面の幅方向両端部が、前記電池ケースの内側周面に接触する請求項10記載の円筒形電池。 - 前記電極接触部における他方面の幅方向両端部に、前記電池ケースの内側周面に接触して前記接触面の幅方向両端部を前記電極群の側面に押圧させる押圧補強構造が形成されている請求項10記載の円筒形電池。
- 前記ケース接触部が、前記電極接触部の他方面において中心軸方向に沿って並列に少なくとも2つ形成されている請求項10記載の円筒形電池。
- 前記スペーサが、前記電極群を前記電池ケースの中心位置から偏心した位置に固定するものである請求項1記載の円筒形電池。
- 横倒しにした状態において、前記電極群の重心位置が前記電池ケースの中心位置よりも鉛直下側に位置するものである請求項17記載の円筒形電池。
- 前記スペーサが、前記電極群を挟むように設けられた一対のスペーサであり、
前記一対のスペーサが、前記電池ケースの中心軸方向から見て前記電極群に対して非対称形状である請求項17記載の円筒形電池。 - 前記各スペーサの前記中心軸方向に直交する断面積が互いに異なる請求項19記載の円筒形電池。
- 前記電極群の一方の電極の集電端子が前記電池ケースの底面に溶接されるものであり、
前記一対のスペーサのうち、前記中心軸方向に直交する断面積が大きいスペーサに前記集電端子を前記電池ケースに溶接するための溶接棒が挿入される溶接孔が形成されている請求項19記載の円筒形電池。 - 前記各スペーサが、前記電極群の側面に接触する接触面を一方面に有する平板状の電極接触部と、前記電極接触部の他方面から延出して前記電池ケースの内側周面に接触するケース接触部とを有し、
前記各スペーサにおけるケース接触部の長さが互いに異なる請求項19記載の円筒形電池。 - 前記正極の集電端子又は前記負極の集電端子が、前記スペーサにおける前記電池ケースの底面側とは反対側の上部において、前記電池ケースの内側周面に延びている請求項1記載の円筒形電池。
- 前記正極の集電端子又は前記負極の集電端子が、前記スペーサの上部において前記電池ケースの内側周面に溶接されている請求項23記載の円筒形電池。
- 前記正極の集電端子又は前記負極の集電端子が、前記スペーサの上面に沿って前記電池ケースの内側周面に延びている請求項23記載の円筒形電池。
- 前記スペーサの上面に前記正極の集電端子又は前記負極の集電端子を前記電池ケースの内側周面にガイド溝が形成されている請求項25記載の円筒形電池。
- 前記スペーサの上部において、一端が前記電極群の側面側に開口し、他端が前記電池ケースの内側周面側に開口する貫通孔が形成されており、
前記正極の集電端子又は前記負極の集電端子が、前記貫通孔を通って前記電池ケースに延びている請求項25記載の円筒形電池。 - 前記スペーサが、前記電池ケースの内側周面と前記一対の外側面それぞれとの間に設けられた対をなすものであり、
前記対をなすスペーサの端部が互いに連続しており、折り曲げられることによって前記電極群を挟むように構成されている請求項1記載の円筒形電池。 - 前記各スペーサが、前記電極群に接触する接触面を一方面に有する平板状の電極接触部と、前記電極接触部の他方面から延出して前記電池ケースの内側周面に接触するケース接触部とを有し、
前記電極接触部における前記電池ケースの中心軸方向に沿った方向の端部が連続している請求項28記載の円筒形電池。 - 前記電池ケースの底部側において、前記スペーサと前記電池ケースの内側周面との間にすき間がある請求項1記載の円筒形電池。
- 前記スペーサの上部に、前記電極群の上面に対向する突起片が設けられている請求項1記載の円筒形電池。
- 前記スペーサの上部に、前記電極群の上角部を囲む囲み壁部が設けられている請求項1記載の円筒形電池。
- 前記電極群が、概略四角柱状をなす正極と、当該正極の少なくとも4つの側周面にセパレータを介して対向して設けられた平板状をなす負極とを有する請求項1記載の円筒形電池。
- 前記負極が、概略Uの字状に折り曲げられて形成された2枚の負極板から構成されており、一方の負極板が前記正極板の一方の対をなす側周面及び底面に対向して設けられ、他方の負極板が前記正極板の他方の対をなす側周面及び底面に対向して設けられている請求項33記載の円筒形電池。
- 前記正極又は前記負極の一方の集電端子が、前記電池ケースの内面に溶接されることなく接触し、前記スペーサにより前記内面に押圧されている請求項1記載の円筒形電池。
- 前記集電端子が、前記電池ケースの内側周面に接触している請求項35記載の円筒形電池。
- 前記電池ケース内に配置されるとともに前記電極群に接触して設けられ、電解液を保持する保液部材を備え、
前記スペーサが、前記電極群及び前記保液部材を前記電池ケースに固定する請求項1記載の円筒形電池。 - 前記保液部材が、前記スペーサ及び前記電極群との間に挟まれて固定される請求項37記載の円筒形電池。
- 前記スペーサが、前記電極群をその積層方向から挟むように設けられており、
前記正極又は負極が、集電端子を有する1つの第1極板要素と、集電端子を有さない1つ以上の第2極板要素とを有し、それら極板要素を接触させて積層して構成される請求項1記載の円筒形電池。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201280034656.4A CN103650205B (zh) | 2011-07-20 | 2012-07-20 | 圆筒形电池 |
US14/233,260 US9379363B2 (en) | 2011-07-20 | 2012-07-20 | Cylindrical battery |
EP12815591.8A EP2736096B1 (en) | 2011-07-20 | 2012-07-20 | Cylindrically shaped battery |
JP2013524758A JP5915654B2 (ja) | 2011-07-20 | 2012-07-20 | 円筒形電池 |
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CN103943800A (zh) * | 2014-04-11 | 2014-07-23 | 昆山达功电子有限公司 | 一种蓄电池 |
JP2015060712A (ja) * | 2013-09-18 | 2015-03-30 | 株式会社東芝 | 二次電池 |
JP2016004777A (ja) * | 2014-06-17 | 2016-01-12 | 三星エスディアイ株式会社Samsung SDI Co.,Ltd. | 2次電池 |
US9722215B2 (en) | 2011-07-20 | 2017-08-01 | Gs Yuasa International Ltd. | Cylindrical battery |
US10243177B2 (en) | 2011-03-25 | 2019-03-26 | Gs Yuasa International Ltd. | Cylindrical battery and battery electrode structure |
US10468711B2 (en) | 2011-08-02 | 2019-11-05 | Gs Yuasa International Ltd. | Electrode plate, layered electrode group, and battery |
JP2022074288A (ja) * | 2020-11-04 | 2022-05-18 | プライムプラネットエナジー&ソリューションズ株式会社 | 二次電池 |
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DE102015115602A1 (de) * | 2015-09-16 | 2017-03-16 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Batteriezelle für die Traktionsbatterie eines elektrisch betriebenen Fahrzeugs und entsprechendes Herstellungsverfahren |
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US10243177B2 (en) | 2011-03-25 | 2019-03-26 | Gs Yuasa International Ltd. | Cylindrical battery and battery electrode structure |
US9722215B2 (en) | 2011-07-20 | 2017-08-01 | Gs Yuasa International Ltd. | Cylindrical battery |
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JP7285814B2 (ja) | 2020-11-04 | 2023-06-02 | プライムプラネットエナジー&ソリューションズ株式会社 | 二次電池 |
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EP2736096A4 (en) | 2015-08-12 |
US20140147732A1 (en) | 2014-05-29 |
EP2736096B1 (en) | 2017-11-08 |
JPWO2013012084A1 (ja) | 2015-02-23 |
US9379363B2 (en) | 2016-06-28 |
CN103650205B (zh) | 2016-10-05 |
EP2736096A1 (en) | 2014-05-28 |
JP5915654B2 (ja) | 2016-05-11 |
CN103650205A (zh) | 2014-03-19 |
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