Battery cover for prevention of electrolyte leakage
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H01M-002/04
H01M-002/36
출원번호
US-0762678
(2013-02-08)
등록번호
US-9269931
(2016-02-23)
우선권정보
KR-10-2012-0136977 (2012-11-29)
발명자
/ 주소
Kim, Hyun Ryung
Park, Seung Bok
Lee, Kyu Hyeong
출원인 / 주소
GLOBAL BATTERY CO., LTD.
대리인 / 주소
The PL Law Group, PLLC
인용정보
피인용 횟수 :
0인용 특허 :
1
초록▼
In a battery cover, a sealed assembly structure of upper and lower covers of a battery case is configured in such a way that it forms a labyrinth structure that can allow an electrolyte to move upward and downward, thereby increasing an electrolyte leakage resistance of the battery case. Gas dischar
In a battery cover, a sealed assembly structure of upper and lower covers of a battery case is configured in such a way that it forms a labyrinth structure that can allow an electrolyte to move upward and downward, thereby increasing an electrolyte leakage resistance of the battery case. Gas discharge holes and micro-holes are formed in the battery cover, and so the battery cover can easily discharge gas from the battery case. In the battery cover, electrolyte recovery ports are arrayed in such a way that the electrolyte can be prevented from leaking from the battery case even when the battery case is turned over or tilts to one side.
대표청구항▼
1. A battery cover for prevention of electrolyte leakage, comprising: a lower cover to be hermetically seated on an upper end of a battery case that stores an electrolyte therein, the lower cover comprising: one or more lower cells arranged lengthwise on an upper surface of the lower cover;a lower w
1. A battery cover for prevention of electrolyte leakage, comprising: a lower cover to be hermetically seated on an upper end of a battery case that stores an electrolyte therein, the lower cover comprising: one or more lower cells arranged lengthwise on an upper surface of the lower cover;a lower wall extending horizontally and vertically at spaced locations; anda lower labyrinth wall extending vertically in a space between the lower cells and the lower wall;lower recovery ports each having one or more recovery holes so as to recover a leaked electrolyte into the battery case, wherein the lower recovery ports are formed in the respective lower cells;gas discharge holes formed in each of the one or more lower cells communicating with the battery case that stores the electrolyte therein, thereby discharging gas from the battery case; andmicro-holes communicating with an interior of the battery case to discharge gas from the battery case, the micro-holes spaced apart from the lower recovery ports and are formed in only the opposite outermost cells of the one or more lower cells:andan upper cover mounted to an upper end of the lower cover, the upper cover comprising: one or more upper cells arranged lengthwise on a lower surface of the upper cover;an upper inner wall extending horizontally and vertically at spaced locations;an upper labyrinth wall extending vertically in a space between the upper cells and the upper inner wall and connecting the upper cells to the upper inner wall, the upper labyrinth wall comprising a pair of upper labyrinth walls that are spaced apart from each other, the lower labyrinth wall placed between the pair of upper labyrinth walls;upper recovery ports that form walls protruding from lower surfaces of the upper cells, the upper recovery ports sealing upper ends of lower recovery ports; andupper dampers horizontally extending within areas of the upper cells, the upper dampers functioning as dams for preventing a movement of the electrolyte. 2. The battery cover as set forth in claim 1, wherein the upper cover further comprises: an outer wall protruding along an edge of the lower surface of the upper cover and extending horizontally and vertically so that the outer wall forms a rim along the edge of the lower surface of the upper cover;gas discharge ports formed through the outer wall from opposite outermost upper cells of the one or more upper cells so as to discharge gas that is discharged from the battery case;a guide wall extending inclinedly in a vertical direction at a location between the outer wall and the upper inner wall; andone or more upper cell partition walls extending vertically from the upper inner wall so as to partition the one or more upper cells from each other. 3. The battery cover as set forth in claim 2, wherein the upper inner wall comprises: a first upper inner wall extending along upper ends of the one or more upper cells;second upper inner walls extending vertically from opposite ends of the first upper inner wall and having respective bent parts that are bent inwardly in opposite ends of the upper cover having the gas discharge ports; anda third upper inner wall extending horizontally between ends of the second upper inner walls at a location opposed to the first upper inner wall, thereby forming lower horizontal walls of the one or more upper cells. 4. The battery cover as set forth in claim 1, wherein each of the lower recovery ports includes: the one or more recovery holes being open at upper ends thereof and formed through a bottom surface of an associated lower cell so as to communicate with the battery case;a recovery port outside wall protruding upward from the bottom surface through which the recovery holes are formed; andone or more cutout holes formed by cutting the recovery port outside wall and allowing the leaked electrolyte to flow therethrough. 5. The battery cover as set forth in claim 1, wherein the lower cells, on which the upper cells are placed, further include: lower injection ports formed through bottom surfaces of the lower cells so as to inject the electrolyte into the battery case;lower horizontal walls extending horizontally in a way such that the lower horizontal walls are spaced apart from the lower wall;lower cell partition walls extending vertically so as to partition neighboring lower cells from each other; andlower guide walls extending from outside walls of the lower injection ports to the lower horizontal walls after passing the lower recovery ports in such a way that the lower guide walls are spaced apart from the lower cell partition walls, so that the lower guide walls form electrolyte passages for guiding leaked electrolyte from the lower recovery ports or from the lower injection ports to the lower labyrinth wall. 6. The battery cover as set forth in claim 5, wherein the lower cells include: first lower extension walls extending from outside walls of the lower recovery ports in directions toward opposite outermost lower cells;second lower extension walls extending from the lower cell partition walls so as to form walls spaced apart from the lower recovery ports, thereby defining electrolyte passages for guiding leaked electrolyte; andthird lower extension walls extending horizontally from outside walls of the lower injection ports at locations opposite to the lower guide walls, thereby forming electrolyte passages between distal ends thereof and lower cells close to the distal ends. 7. The battery cover as set forth in claim 5, wherein each of the lower cells is configured such that a height of a first bottom surface forming an electrolyte passage between the lower guide wall and the lower cell partition wall is higher than a height of a second bottom surface in which both the lower recovery port and the lower injection port are formed. 8. The battery cover as set forth in claim 7, wherein each of the lower cells further includes: an inclined surface sloping down from the first bottom surface to the second bottom surface. 9. The battery cover as set forth in claim 5, wherein the upper cells include: upper injection ports welded to the lower injection ports of the lower cells, thereby sealing the lower injection ports. 10. The battery cover as set forth in claim 1, wherein the upper cells further include: upper horizontal walls extending horizontally so as to allow the upper labyrinth wall to be connected vertically;first upper extension walls extending inclinedly from the upper recovery ports;upper guide walls extending vertically from first ends of the upper horizontal walls; andupper guider walls extending vertically from second ends of the upper horizontal walls and forming passages between the upper guider walls and the upper inner wall that extends in a direction equal to directions of the upper guider walls, thereby guiding electrolyte and gas.
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이 특허에 인용된 특허 (1)
Robert W. Fritts ; David M. Revak, Leak resistant battery cover.
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