Electric storage device and electric storage apparatus
First Claim
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1. An electric storage device, comprising:
- an electrode assembly including a positive electrode plate and a negative electrode plate insulated from each other;
a case for housing the electrode assembly, the case being insulated from the electrode assembly;
a positive-electrode external terminal arranged on an outer surface of the case and electrically connected to the positive electrode plate, and a negative-electrode external terminal arranged on the outer surface of the case and electrically connected to the negative electrode plate; and
a gas exhaust valve formed in a region of the case on an opposite side of a region where the positive-electrode external terminal and the negative-electrode external terminal are arranged,wherein the electrode assembly includes a multilayer structure in which the positive electrode plate and the negative electrode plate are multilayered, at least one of the positive electrode plate and the negative electrode plate includes a lead portion which protrudes from the multilayer structure in a first direction that the positive-electrode external terminal is spaced apart from the negative-electrode external terminal, and the gas exhaust valve is overlaps with the lead portion in a second direction orthogonal to the first direction, the second direction extending from the region of the case in which the gas exhaust valve is located to the region where the positive-electrode external terminal and the negative-electrode external terminal are arranged;
wherein the case comprises;
a case body including a first opening edge portion in one end thereof;
a first cover plate for closing a first opening formed by the first opening edge portion, wherein the case exhaust valve is formed in the first cover plate; and
the first cover plate is convexed inwardly.
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Abstract
An electric storage device is provided with an electrode assembly including a positive electrode plate and a negative electrode plate; a case for housing the electrode assembly; a positive-electrode external terminal arranged on an outer surface of the case and electrically connected to the positive electrode plate; a negative-electrode external terminal arranged on an outer surface of the case and electrically connected to the negative electrode plate; and a gas exhaust valve formed in a region of the case on the opposite side of a region where the positive-electrode external terminal and the negative-electrode external terminal are arranged.
21 Citations
19 Claims
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1. An electric storage device, comprising:
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an electrode assembly including a positive electrode plate and a negative electrode plate insulated from each other; a case for housing the electrode assembly, the case being insulated from the electrode assembly; a positive-electrode external terminal arranged on an outer surface of the case and electrically connected to the positive electrode plate, and a negative-electrode external terminal arranged on the outer surface of the case and electrically connected to the negative electrode plate; and a gas exhaust valve formed in a region of the case on an opposite side of a region where the positive-electrode external terminal and the negative-electrode external terminal are arranged, wherein the electrode assembly includes a multilayer structure in which the positive electrode plate and the negative electrode plate are multilayered, at least one of the positive electrode plate and the negative electrode plate includes a lead portion which protrudes from the multilayer structure in a first direction that the positive-electrode external terminal is spaced apart from the negative-electrode external terminal, and the gas exhaust valve is overlaps with the lead portion in a second direction orthogonal to the first direction, the second direction extending from the region of the case in which the gas exhaust valve is located to the region where the positive-electrode external terminal and the negative-electrode external terminal are arranged; wherein the case comprises; a case body including a first opening edge portion in one end thereof; a first cover plate for closing a first opening formed by the first opening edge portion, wherein the case exhaust valve is formed in the first cover plate; and the first cover plate is convexed inwardly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 19)
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15. An electric storage device, comprising:
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an electrode assembly including a positive electrode plate and a negative electrode plate insulated from each other; a case for housing the electrode assembly, the case comprising; a case body including a first opening edge portion and a second opening edge portion in both ends thereof; a first cover plate for closing a first opening formed by the first opening edge portion; and a second cover plate for closing a second opening formed by the second opening edge portion; and a positive-electrode external terminal arranged on an outer surface of the case and electrically connected to the positive electrode plate, and a negative-electrode external terminal arranged on the outer surface of the case and electrically connected to the negative electrode plate, wherein at least one of the first cover plate and the second cover plate includes a plate member in which an outer peripheral portion of the cover plate mates with an inner circumferential surface of one of the first opening edge portion and the second opening edge portion corresponding to the cover plate and which is convexed inwardly, and the outer peripheral portion and one of the first opening edge portion and the second opening edge portion corresponding to the cover plate having the outer peripheral portion are joined to each other, wherein the electrode assembly includes a multilayer structure in which the positive electrode plate and the negative electrode plate are multilayered, at least one of the positive electrode plate and the negative electrode plate includes a lead portion which protrudes from the multilayer structure in a first direction that the positive-electrode external terminal is spaced apart from the negative-electrode external terminal, and a gas exhaust valve overlaps with the lead portion in a second direction orthogonal to the first direction, the second direction extending from the first cover plate to the second cover plate, and wherein the first cover plate and second cover plate include an outer peripheral portion that mates with the inner circumferential surface of the corresponding opening edge portion and that is convexed inwardly, and the first outer peripheral portion is joined to the inner circumferential surface of the first opening edge portion and the second outer peripheral portion is joined to the inner circumferential surface of the second opening edge portion.
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16. An electric storage device, comprising:
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an electrode assembly including a positive electrode plate and a negative electrode plate insulated from each other; a case for housing the electrode assembly, the case comprising; a case body including a first opening edge portion and a second opening edge portion in both ends thereof; a first cover plate for closing a first opening formed by the first opening edge portion; and a second cover plate for closing a second opening formed by the second opening edge portion; and a positive-electrode external terminal arranged on an outer surface of the case and electrically connected to the positive electrode plate, and a negative-electrode external terminal arranged on the outer surface of the case and electrically connected to the negative electrode plate, wherein the electrode assembly includes a multilayer structure in which the positive electrode plate and the negative electrode plate are multilayered, at least one of the positive electrode plate and the negative electrode plate includes a lead portion which protrudes from the multilayer structure in a first direction that the positive-electrode external terminal is spaced apart from the negative electrode external terminal, and wherein a critical withstand pressure in an area of one of the first cover plate and the second cover plate is made lower than a critical withstand pressure of an other of the first cover plate and the second cover plate and the case body, the area of said one of the first cover plate and the second cover plate overlapping with the lead portion in a second direction orthogonal to the first direction, the second direction extending from the first cover plate to the second cover plate, and wherein the first cover plate and second cover plate include an outer peripheral portion that mates with the inner circumferential surface of the corresponding opening edge portion and that is convexed inwardly, and the first outer peripheral portion is joined to the inner circumferential surface of the first opening edge portion and the second outer peripheral portion is joined to the inner circumferential surface of the second opening edge portion. - View Dependent Claims (17)
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18. An electric storage apparatus, comprising:
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a plurality of electric storage devices each of which includes an electrode assembly including a positive electrode plate and a negative electrode plate insulated from each other and a case for housing the electrode assembly, the electric storage devices aligning in an arrangement direction; and a fixing member arranged between adjacent electric storage devices, the case comprising; a case body including at least one opening edge portion; and a cover plate joined to the opening edge portion, wherein the case exhaust valve is formed in the cover plate; and the cover plate is convexed inwardly, wherein a mating portion which is the joined portion between the case body and the cover plate is formed by joining the case body and the cover plate, and the fixing member includes a pair of engaging portions engaged respectively with the mating portion of one of adjacent electric storage devices and the mating portion of an other of the adjacent electric storage devices, wherein at least one of the electric storage devices comprises a positive-electrode external terminal arranged on an outer surface of the case and electrically connected to the positive electrode plate, and a negative-electrode external terminal arranged on the outer surface of the case and electrically connected to the negative electrode plate, and wherein the electrode assembly includes a multilayer structure in which the positive electrode plate and the negative electrode plate are multilayered, at least one of the positive electrode plate and the negative electrode plate includes a lead portion which protrudes from the multilayer structure in a first direction that the positive-electrode external terminal is spaced apart from the negative-electrode external terminal, and a gas exhaust valve overlaps with the lead portion in a second direction orthogonal to the first direction, the second direction extending from the outer surface of the case to the cover plate.
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Specification