Battery pack
AssigneeTDK-Lambda Corporation
InventorsHiroshi Nakazawa, Katsuhiko Nakane
Life of this patent
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Abstract
There is provided a risk-free and easy-to-use battery pack using battery cells 1 as a secondary battery, in which internal gases evaporated by applying overvoltage or the like thereto are processed inside a case to be prevented from leaking to the outside of the case and thereby even if the case has been led to rise in pressure due to a thermorunaway of the battery, the case is free from breaking. To realize this performance, the battery pack 10 is provided with a battery cell housing 17 for housing lithium cells 1 and a gas processor 15 for liquefying the internal gases g generated from the lithium cells 1.
Claims4
A battery pack comprising:
- a case;
- a battery cell housing which houses battery cells, and
- a gas processor which liquefies gases generated from said battery cells, comprising:
- a metallic body including a plurality of spaces partitioned by partition walls and formed by making a metallic material into a boxy shape, said metallic material being excellent in thermal conductivity and in exoergic property;
- a gas inflow port provided in a space of said metallic body;
- a gas exhaust port provided in another space of said metallic body;
- and
- a ventilation hole provided in each of said partition walls,
- wherein said gas inflow port is arranged over against said battery cell housing,
- wherein said battery cell housing and said gas processor are provided inside said case,
- wherein said gas processor is structured separately from said battery cell housing;
- wherein said battery cells are lithium cells and are housed in said battery cell housing as a battery stack having a structure built up by stacking said battery cells one above the other,
- wherein said battery cells comprise a safety valve which discharges said gases to the outside of each battery cell when an internal pressure of each battery cell has become equal to or higher than a given pressure, and
- wherein said gas processer is provided behind said safety valve.
Dependencies are inferred from the claim text.