Some aspects in the designt and development of bipolar Ni/MH battery are presented. After optimizing sealing technique and modifying capacity ratio of two adjacent electrodes in one sub-cell, some bipolar Ni/MH stacks...Some aspects in the designt and development of bipolar Ni/MH battery are presented. After optimizing sealing technique and modifying capacity ratio of two adjacent electrodes in one sub-cell, some bipolar Ni/MH stacks with 6 sub-cells have been assembled and investigated. Electrochemical testing results show the bipolar battery has excellent high rate discharge capability and fast recharge ability, artd satisfactory charging efficiency in different states of charge. Moreover, the hattery also displays good stability under pulse cycles in simulating hybrid vehicle working oonditions.展开更多
对储气库注采井等高压气井油管柱泄漏数据统计分析发现,现场特殊螺纹接头泄漏的比例远大于实验室。通过了API RP 5C5—2017 CAL IV实验室内系统评价和下井前气密封试验的油管特殊螺纹接头,在井下服役一段时间后仍然发生泄漏。为此,对内...对储气库注采井等高压气井油管柱泄漏数据统计分析发现,现场特殊螺纹接头泄漏的比例远大于实验室。通过了API RP 5C5—2017 CAL IV实验室内系统评价和下井前气密封试验的油管特殊螺纹接头,在井下服役一段时间后仍然发生泄漏。为此,对内外螺纹上扣啮合后存在的间隙进行简化,建立有限元数值模拟模型,分析了充满螺纹脂的螺纹接头的密封压力;基于气体状态方程,分析了泄漏气体冲破螺纹脂密封压力逸出接箍的时间。分析结果表明,依据API RP 5C5—2017标准推荐做法,内外螺纹均涂抹螺纹脂上扣,即使试验过程中特殊螺纹接头金属密封发生泄漏,泄漏的气体也可能因被封闭在接箍内的孔隙中而无法被检测到,从而导致错误的评价结果。展开更多
文摘Some aspects in the designt and development of bipolar Ni/MH battery are presented. After optimizing sealing technique and modifying capacity ratio of two adjacent electrodes in one sub-cell, some bipolar Ni/MH stacks with 6 sub-cells have been assembled and investigated. Electrochemical testing results show the bipolar battery has excellent high rate discharge capability and fast recharge ability, artd satisfactory charging efficiency in different states of charge. Moreover, the hattery also displays good stability under pulse cycles in simulating hybrid vehicle working oonditions.
文摘对储气库注采井等高压气井油管柱泄漏数据统计分析发现,现场特殊螺纹接头泄漏的比例远大于实验室。通过了API RP 5C5—2017 CAL IV实验室内系统评价和下井前气密封试验的油管特殊螺纹接头,在井下服役一段时间后仍然发生泄漏。为此,对内外螺纹上扣啮合后存在的间隙进行简化,建立有限元数值模拟模型,分析了充满螺纹脂的螺纹接头的密封压力;基于气体状态方程,分析了泄漏气体冲破螺纹脂密封压力逸出接箍的时间。分析结果表明,依据API RP 5C5—2017标准推荐做法,内外螺纹均涂抹螺纹脂上扣,即使试验过程中特殊螺纹接头金属密封发生泄漏,泄漏的气体也可能因被封闭在接箍内的孔隙中而无法被检测到,从而导致错误的评价结果。
