| 摘要 |
A battery pack, which can secure the strength of an outer case, minimize the thickness over the whole outer case and ensure a battery capacity of the battery pack, by forming a portion of a main wall of the outer case with a metal plate. The battery pack includes a core pack, a first case, and a second case. The first case has a periphery including a first resin molding part, and is configured to cover a first surface of the core pack. The second case has a periphery including a second molding part, and is configured to cover a second surface of the core pack. The first and second cases are connected with each other by a weld of the first and second molding parts. |
| 主权项 |
1. A battery pack comprising:
a core pack including:
a pouch bare cell having an electrode assembly and a pouch case having a cavity configured to receive the electrode assembly, anda protection circuit member arranged at a part of the pouch bare cell and having an exterior input/output terminal adapted to be electrically connected to the pouch bare cell; a first case having a periphery comprising a first resin molding part, and configured to cover a first surface of the core pack; and a second case having a periphery comprising a second resin molding part, and configured to cover a second surface of the core pack, wherein the first and second cases are connected with each other by a weld of the first and second molding parts, wherein the pouch case comprises a first surface provided with the cavity having a base and four sides, and a second surface covering the cavity, wherein the first case comprises a first metal plate configured to form at least a first main wall, and the first resin molding part configured to form at least a first sidewall, the first main wall and the first sidewall being configured to surround the first surface of the core pack, and wherein the second case comprises a second metal plate configured to form at least a second main wall, and the second resin molding part configured to form at least a second sidewall, the second main wall and the second sidewall being configured to surround the second surface of the core pack, wherein the first metal plate comprises: a first plane part having a rectangular shape to form the first main wall; and a first bent part bent and extended as one body from a periphery of the first plane part, the first bent part comprising:
a diagonal plane bent and extended from the periphery of the first plane part in a diagonal direction away from the periphery of the first plane part and away from the core pack; anda parallel surface extended from a periphery of the diagonal plane in a direction away from the core pack and parallel to the first plane part, wherein the base and the four sides of the pouch case meet at a plurality of edges, and wherein at least two facing edges of the plurality of edges are configured to have a rounded shape on the first surface of the pouch case, the at least two edges having the rounded shape defining a space between the pouch case and the diagonal plane, wherein the first resin molding part comprises a first resin part surrounding the first bent part to form a periphery of the first main wall, the first resin part occupying at least a portion of the space between the pouch case and the diagonal plane, and wherein the second metal plate comprises a second plane part having a rectangular shape with dimensions substantially equal to the second surface of the core pack, the second plane part being configured to correspond to the second surface of the core pack, the second metal plate further comprising a second bent part vertically bent, as one body, from a periphery of the second plane part, wherein a height of the second bent part ranges from ⅓ to ⅔ of a height formed between the second surface of the pouch case and the base of the first surface of the pouch case. |
