A battery pack includes a plurality of batteries interlocked linearly through a connector. The connector includes an inner peripheral portion to be welded to one battery, and an outer peripheral portion, provided outside the inner peripheral portion, to be welded to the other battery. The inner peri
A battery pack includes a plurality of batteries interlocked linearly through a connector. The connector includes an inner peripheral portion to be welded to one battery, and an outer peripheral portion, provided outside the inner peripheral portion, to be welded to the other battery. The inner peripheral portion and the outer peripheral portion have a step in between, and the step places the inner peripheral portion in a concave portion of the connector. The inner peripheral portion of the connector is located interiorly of a caulking convex strip provided at an end face of one battery, and an inner peripheral portion is connected to the battery end face through welding without coming in contact with the caulking convex strip. The outer peripheral portion is connected to an outer peripheral portion of a battery end face of the other battery through welding.
대표청구항▼
The invention claimed is: 1. A battery pack comprising: a plurality of linearly aligned batteries; and a connector, disposed between two of the batteries to interlock and electrically connect the batteries, the connector being welded to the batteries to electrically connect the batteries; and a hol
The invention claimed is: 1. A battery pack comprising: a plurality of linearly aligned batteries; and a connector, disposed between two of the batteries to interlock and electrically connect the batteries, the connector being welded to the batteries to electrically connect the batteries; and a holder cap covering the interface between the two batteries that are interlocked linearly by the connector, wherein the connector includes an inner peripheral portion to be welded to one of the two batteries, an outer peripheral portion, provided outside the inner peripheral portion, to be welded to the other battery, and a step portion between the inner peripheral portion and the outer peripheral portion, the step portion placing the inner peripheral portion in a concave portion of the connector; wherein the inner peripheral portion of the connector is disposed on an interior side of a caulking strip that is provided on a battery end face of the one battery, and the inner peripheral portion is welded to the battery end face without coming in contact with the caulking strip, and wherein the outer peripheral portion of the connector is welded to an outer peripheral portion of a battery end face of the other battery such that the opposing battery end faces of the one battery and the other battery are welded with the connector, respectively, and wherein the holder cap includes a cylinder portion and a holder portion which is formed integrally with the cylinder portion, the holder portion protrudes inwardly such that the holder portion is inserted into a gap formed between the battery end face of the other battery and the outer peripheral portion of the connector in which the welded portion of the outer peripheral portion of the connector and the outer peripheral portion of a battery end face of the other battery is positioned. 2. The battery pack according to claim 1, wherein the connector is provided with welding convex portions on the inner peripheral portion and on the outer peripheral portion, the welding convex portions on the inner peripheral portion and the welding convex portions on the outer peripheral portion being located in close proximity to each other. 3. The battery pack according to claim 1, wherein a plurality of welding convex portions are provided on one of the inner peripheral portion and the outer peripheral portion, and notch portions are made between the welding convex portions placed adjacently. 4. The battery pack according to claim 1, further comprising an insulator disposed between the outer peripheral portion of the connector and the caulking strip. 5. The battery pack according to claim 4, wherein the insulator is an insulation ring positioned between the outer peripheral portion of the connector and the caulking strip. 6. The battery pack according to claim 1, wherein the holder portion holds the connector at a fixed position, the holder portion being provided with a through-hole used to permit connection of both surfaces of the connector respectively to the batteries placed at opposing positions. 7. The battery pack according to claim 1, wherein the holder cap includes a holder portion that holds the connector at a fixed position, and a cylinder portion, which is coupled to an outer periphery of the holder portion, and into which an end portion of the battery having a slot portion formed on a circumference thereof is inserted, the cylinder portion being provided with a stopper portion, which protrudes from an inner surface and is fit into the slot portion which is provided at an end portion of the battery, so that the holder cap will not come off easily, the holder cap being coupled to the battery by guiding the stopper convex portion to the slot portion of the battery, the holder cap coupled to the battery holding the connector at the fixed position. 8. The battery pack according to claim 1, wherein: the holder cap includes a first cylinder portion into which an end portion of the one battery is inserted, and a second cylinder portion into which an end portion of the other battery is inserted so as to be coupled the two batteries to each other, the first cylinder portion and the second cylinder portion being linearly aligned with respect to each other; and thereby the two adjacent batteries are interlocked linearly with the holder cap by inserting the end portions thereof into the first cylinder portion and the second cylinder portion, respectively. 9. The battery pack according to claim 8, wherein the first cylinder portion is provided with a convex stopper portion to be guided into a slot portion provided at an end portion of the one battery. 10. The battery pack according to claim 8, wherein the holder cap includes a holder portion that holds the connector at a fixed position, the holder portion being disposed between the first cylinder portion and the second cylinder portion and provided with a through-hole for enabling connection of both surfaces of the connector respectively to the two batteries placed at opposing positions. 11. The battery pack according to claim 1, further comprising a buffer ring made of an elastic body and disposed between an outer edge of the battery end face and the connector, wherein the connector is welded to the battery end face of the one battery inside the buffer ring and the outer peripheral portion of the connector is welded to one of the battery end face and an outer peripheral surface of the other battery. 12. The battery pack according to claim 11, wherein; the buffer ring is an insulation ring, which is pinched between the connector and the caulking strip of an exterior case of the one battery provided so as to protrude from a circumference of the end face of the one battery and thereby electrically isolates the connector from the caulking strip of the exterior case. 13. The battery pack according to claim 12, wherein the buffer ring is provided with a ring-like strip that is provided along an inner edge of the caulking strip. 14. The battery pack according to claim 11, wherein the step portion provided between the inner peripheral portion and the outer peripheral portion of the connector is located interiorly of an inside surface of the buffer ring, the inner peripheral portion of the connector being coupled to a sealing plate of the one battery through welding, the outer peripheral portion being welded to a bottom surface of an exterior case of the other battery through welding. 15. The battery pack according to claim 11, further comprising a holder cap, disposed between the two batteries for holding the connector at a fixed position, wherein the holder cap includes a cylinder portion into which end portions of the two batteries are inserted, and a holder portion that holds the connector. 16. The battery pack according to claim 15, wherein an outside shape of the buffer ring is substantially identical to an inner shape of the cylinder portion of the holder cap, and the buffer ring is fit into the cylinder portion. 17. The battery case according to claim 15, wherein outer shapes of the buffer ring and the connector are substantially identical with an inner shape of the cylinder portion. 18. A battery pack comprising: a plurality of linearly aligned batteries; and a connector, disposed between two of the batteries to interlock and electrically connect the batteries, the connector being welded to the batteries to electrically connect the batteries, wherein the connector includes an inner peripheral portion to be welded to one of the batteries, an outer peripheral portion, provided outside the inner peripheral portion, to be welded to the other battery, and a step portion between the inner peripheral portion and the outer peripheral portion, the step portion placing the inner peripheral portion in a concave portion of the connector; wherein the inner peripheral portion of the connector is disposed on an interior side of a caulking strip that is provided on a battery end face of the one battery, and the inner peripheral portion is welded to the battery end face without coming in contact with the caulking strip, and wherein the outer peripheral portion of the connector is welded to an outer peripheral portion of a battery end face of the other battery such that the opposing battery end faces of the one battery and the other battery are welded with the connector, respectively, wherein the connector comprises a metal plated layer on a surface thereof, the metal plated layer including a high resistive plated layer and a low resistive plated layer each having different conductivity. 19. The battery pack according to claim 18, wherein the metal plated layer is formed by depositing the high resistive plated layer on a surface of the low resistive plated layer. 20. The battery pack according to claim 18, wherein the high resistive plated layer is one of nickel and nickel alloy, or one of chromium and chromium alloy, and the low resistive plated layer is one of copper and copper alloy, or one of silver and silver alloy. 21. The battery pack according to claim 20, wherein the high resistive plated layer is nickel and the low resistive plated layer is copper. 22. The battery pack according to claim 18, wherein opposite surfaces of the connector are connected, through welding, respectively to battery end faces of the batteries placed at opposing positions.
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이 특허에 인용된 특허 (3)
Oda, Takashi; Okajima, Hideki; Uesugi, Yukichi; Tanaka, Hitoshi; Okumura, Yoshinobu, Battery module and method of manufacturing thereof.
Morishita Takuma,JPX ; Moriwaki Kazuro,JPX ; Takahashi Masatoshi,JPX ; Nakatani Kensuke,JPX, Cell which secures the reliability of a protective circuit.
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