| 摘要 |
PROBLEM TO BE SOLVED: To provide a square sealed secondary battery more improved in safety and reliability against a rise of the internal pressure of the battery and leakage of electrolyte by improving an impact resistance of the square sealed secondary battery relative to external force such as vibration force and a fall impact, while properly maintaining sensitivity of a gas discharge valve.SOLUTION: In this square sealed secondary battery, a seal plate including the gas discharge valve is disposed, and an insulating plate and a spacer are disposed under the seal plate. The insulating plate having a peripheral edge wall part 201 and/or the spacer having a peripheral edge wall part is provided with a bridging part 202 or a pair of ribs to reinforce the impact resistance of these members. |
