BATTERY PACK
A battery pack capable of efficiently dissipating heat generated from battery cells by increasing heat exchange efficiency using coolant, and not requiring a separate driver for driving the flow of cooling water by causing the cooling water to flow in a natural, uncompelled manner. In one exemplary embodiment, the battery pack includes a plurality of battery cells, a cooling part coupled to the plurality of battery cells and including a plurality of cooling plates including a first plate having a coolant inlet opening and a coolant exhaust opening, a second plate having a coolant flow passage, and a third plate, wherein the plurality of cooling plates are sequentially arranged adjacent the plurality of battery cells, and a coolant reservoir for supplying coolant to the first plate and for receiving the coolant from the first plate.
1 . A battery pack comprising:
a plurality of battery cells;
a cooling part coupled to the plurality of battery cells and comprising a plurality of cooling plates comprising:
a first plate having a coolant inlet opening and a coolant exhaust opening;
a second plate having a coolant flow passage; and
a third plate, wherein the plurality of cooling plates are sequentially arranged adjacent the plurality of battery cells; and
a coolant reservoir for supplying coolant to the first plate and for receiving the coolant from the first plate.
2 . The battery pack of claim 1 , wherein the coolant flow passage is between the first plate and the third plate and comprises a plurality of openings in the second plate.
3 . The battery pack of claim 1 , further comprising a thermal pad between the plurality of battery cells and the first plate.
4 . The battery pack of claim 1 , wherein the first plate and the third plate comprise a thermally conductive material.
5 . The battery pack of claim 1 , wherein the first plate and the third plate comprise a metallic material.
6 . The battery pack of claim 1 , wherein the cooling part further comprises a connection part located at one side of the first plate and comprising:
a first connection opening coupled to the coolant inlet opening; and
a second connection opening coupled to the coolant exhaust opening, and wherein the coolant reservoir comprises:
a first connection conduit coupled to the first connection opening; and
a second connection conduit coupled to the second connection opening.
7 . The battery pack of claim 1 , further comprising a wick is located in the coolant flow passage of the second plate.
8 . The battery pack of claim 7 , wherein the wick comprises a first metal line and a second metal line in a mesh type arrangement.
9 . The battery pack of claim 1 , wherein the second plate comprises an adiabatic material.
10 . The battery pack of claim 1 , wherein the second plate comprises a plastic material.
11 . The battery pack of claim 1 , wherein the second plate comprises:
a first layer contacting the first plate;
a second layer contacting the first layer; and
a third layer between the second layer and the third plate.
12 . The battery pack of claim 11 , wherein the first layer comprises:
a first coolant inlet opening for receiving the coolant from the first plate;
a first coolant transfer opening for causing the coolant to be spread in the first layer;
a first coolant collecting opening for causing the coolant to be collected in the first layer; and
a first coolant exhaust opening for causing the coolant to be exhausted to the first plate.
13 . The battery pack of claim 12 , wherein the second layer comprises:
a second coolant inlet opening coupled to the first coolant inlet opening;
a second coolant exhaust opening coupled to a first side of the first coolant transfer opening;
a second coolant transfer opening coupled to a second side of the first coolant transfer opening; and
a second coolant collecting opening coupled to the first coolant collecting opening.
14 . The battery pack of claim 13 , wherein the third layer comprises:
a third coolant inlet opening coupled to the second coolant inlet opening;
a third coolant transfer opening coupled to the second coolant transfer opening; and
a third coolant collecting opening coupled to the second coolant collecting opening.
15 . The battery pack of claim 11 , wherein the third layer has a pulsation flow preventing opening or a weight reducing opening.
16 . The battery pack of claim 1 , wherein at least one of the second plate and the third plate has a pulsation flow preventing opening or a weight reducing opening.
17 . The battery pack of claim 1 , wherein the plurality of cooling plates are located on bottom surfaces of the plurality of battery cells.
18 . The battery pack of claim 1 , further comprising a housing case for covering the plurality of battery cells and a majority of the cooling part while exposing the third plate.
19 . The battery pack of claim 1 , further comprising a heat sink installed in the third plate.