LITHIUM-ION BATTERY MODULE AND BATTERY PACK

To provide a lithium-ion battery module in which even if an upper surface and a bottom surface of the lithium-ion battery module are depressed due to decompression, contact failure does not occur in the case of connection by lamination.SOLUTION: In a lithium-ion battery module 300 in which a power storage element 200 having a plurality of lithium-ion unit cells 100 stacked in series is housed in a battery outer container 110, the power storage element 200 is housed in an opening portion which is surrounded by a frame body 120 such that a positive electrode current collector on an outermost layer is located on an upper surface side of the battery outer container 110 and a negative electrode current collector on the outermost layer is located on a bottom surface side of the battery outer container 110, and the opening portion is covered with a jacket material 150. A positive electrode terminal 130 and the positive electrode current collector on the outermost layer of the power storage element 200 are electrically connected to each other via a first current collection member 160. A negative electrode terminal 140 and the negative electrode current collector on the outermost layer of the power storage element 200 are electrically connected to each other via a second current collection member 170.SELECTED DRAWING: Figure 2 【課題】減圧によってリチウムイオン電池モジュールの上面及び底面に凹みが生じたとしても、積層して接続した場合に接触不良が生じないリチウムイオン電池モジュールを提供する。【解決手段】リチウムイオン単電池１００を複数個直列に積層した蓄電素子２００を電池外装容器１１０に収容したリチウムイオン電池モジュール３００であって、蓄電素子２００が、最外層にある正極集電体が電池外装容器１１０の上面側、最外層にある負極集電体が電池外装容器１１０の底面側となるように枠体１２０に囲われた開口部に収容されて外装材１５０により開口部が覆われており、正極端子１３０と、蓄電素子２００の最外層にある正極集電体とが、第一の集電部材１６０を介して電気的に接続され、かつ、負極端子１４０と、蓄電素子２００の最外層にある負極集電体とが、第二の集電部材１７０を介して電気的に接続されている。【選択図】図２