Battery pack comprising combined temperature-controlling system
First Claim
1. A battery pack comprising a plurality of unit cells electrically connected with each other, whereinthe battery pack is constructed in a structure in which a heat transfer medium flows through gaps defined between the unit cells for controlling the overall temperature of the battery pack to be within a predetermined temperature range for the optimum operation of the battery pack;
- each unit cell is provided at the outer surface thereof, at which the heat transfer medium is brought into contact with each unit cell, with a phase transformation layer for minimizing individual temperature difference between the unit cells;
wherein the battery pack is constructed in a structure in which the unit cells are stacked one on another while the unit cells are spaced a predetermined distance from each other to form a plurality of battery groups, and the battery groups are arranged in lateral direction, and the outer surfaces of the battery groups are surrounded by a pack case;
wherein the unit cells are mounted in a cartridge while the unit cells are arranged in the lateral direction, and the cartridges are stacked one on another to construct the battery pack;
wherein the cartridge comprises a pair of frame members, which can be coupled with each other, and the unit cells are located in cell partition walls of the frame members while the frame members are separated from each other, and are then securely fixed at the cell partition walls of the frame members after the frame members are coupled with each other; and
the unit cell has an electrode tap, which is electrically connected to that of the neighboring unit cell via a bus bar located at the upper part of the cartridge.
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Accused Products
Abstract
Disclosed herein is a middle- or large-sized battery pack including a plurality of unit cells electrically connected with each other, wherein the battery pack is constructed in a structure in which a heat transfer medium flows through gaps defined between the unit cells for controlling the overall temperature of the battery pack to be within a predetermined temperature range for the optimum operation of the battery pack, and each unit cell is provided at the outer surface thereof, at which the heat transfer medium is brought into contact with each unit cell, with a layer containing a phase transformation material (‘phase transformation layer’) for minimizing individual temperature difference between the unit cells. The present invention has the effect of controlling the overall temperature of the battery pack and individual controlling the temperatures of unit cells constituting the battery pack. Also, the present invention has the effect of restraining the abrupt change in temperature of the unit cells, when the battery pack is not in operation or when the external environment abruptly changes, thereby preventing the degradation of the unit cells. Furthermore, the present invention has the effect of minimizing damage to the unit cells due to foreign matter when the foreign matter is brought into contact with the unit cells. In addition, the present invention has the effect of reducing the overall temperature difference of the battery pack and manufacturing a middle- or large-sized battery pack having a compact structure.
23 Citations
12 Claims
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1. A battery pack comprising a plurality of unit cells electrically connected with each other, wherein
the battery pack is constructed in a structure in which a heat transfer medium flows through gaps defined between the unit cells for controlling the overall temperature of the battery pack to be within a predetermined temperature range for the optimum operation of the battery pack; -
each unit cell is provided at the outer surface thereof, at which the heat transfer medium is brought into contact with each unit cell, with a phase transformation layer for minimizing individual temperature difference between the unit cells; wherein the battery pack is constructed in a structure in which the unit cells are stacked one on another while the unit cells are spaced a predetermined distance from each other to form a plurality of battery groups, and the battery groups are arranged in lateral direction, and the outer surfaces of the battery groups are surrounded by a pack case; wherein the unit cells are mounted in a cartridge while the unit cells are arranged in the lateral direction, and the cartridges are stacked one on another to construct the battery pack; wherein the cartridge comprises a pair of frame members, which can be coupled with each other, and the unit cells are located in cell partition walls of the frame members while the frame members are separated from each other, and are then securely fixed at the cell partition walls of the frame members after the frame members are coupled with each other; and the unit cell has an electrode tap, which is electrically connected to that of the neighboring unit cell via a bus bar located at the upper part of the cartridge. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification