| 摘要 |
PURPOSE:To provide a lithium battery with high sealing performance at normal time and sure actuation in the event of abnormality and prevent electrodes from being exposed unnecessarily during and after actuation by furnishing a gas bleeder valve consisting of a gas bleeder piece and a crown lid at a battery jar which accommodates positive electrodes, negative electrodes, and electrolyte. CONSTITUTION:A battery jar, in which positive electrodes 4, negative electrodes 5 containing lithium, and electrolyte are accommodated, is provided with a gas bleeder hole 7, and the base end of a cylindrical gas bleeder piece 9 is fixed to the battery jar in such a way as covering this gas bleeder hole 7 in the condition that the hollow part 15 of the gas bleeder piece is in communication with the gas bleeder hole 7. The periphery of the gas bleeder piece 9 is put in pressure contact by a ring-shaped inward projection 20 formed by pressing specified points on the periphery of a crown lid 13, in the form of a cylinder with head, inward along the circumference, and the crown lid 13 is fixed to the gas bleeder piece 9 while covering the opening at the tip of its hollow part. This provides high sealing performance at normal time and sure exhaustion of gas to outside the battery in the event of abnormal rise of the battery internal pressure associate with gas generation, and the electrodes will not be exposed unnecessarily during and after exhaustion of the gas. |
