LAMINATE TYPE SECONDARY BATTERY AND BATTERY PACK THEREOF

摘要

An electrode terminal 42 is connected to a current collector part 12 of electrodes through a deformation restricting member 3. Between laminate seals 2 and 2, a space 15 is formed above and below the current collector part 12. The deformation restricting member 3 is placed close to the inner wall peripheral portion of an outer package including sealing parts 23, thereby forming a deformation-restricting part 22 to restrict the inward deformation of the laminated films 2. In a section extending from the inside end of the deformation restricting member 3 to a battery element 1, the laminated films 2 face the space 15 to allow the deformation of the laminated films 2 in response to the change of internal pressure. At the decrease of internal pressure, the contraction of the laminated films 2 can be localized in the deformation-allowing part 21, thereby reducing the bending stress on an end portion of the sealing parts 23. Thus, the laminate type secondary battery and the battery pack thereof can be provided with the effect that the concentration of stress on the bonded part of the laminated films can be suppressed even when the expansion and contraction of the laminated films are repeated in response to the change of internal pressure of the laminated films bonded to hermetically accommodate the battery element.