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                                                                                                                                                                                                                                                                                                                                免維護鉛酸蓄電池的主要構成

                                                                                                                                                                                                                                                                                                                                2018-03-22   |  來源:煒業通科技

                                                                                                                                                                                                                                                                                                                                免維護鉛酸蓄電池由正、負極板、隔板和電解液、電池槽及連接條(或鉛零件)、接線端子和排氣閥等組成。
                                                                                                                                                                                                                                                                                                                                  
                                                                                                                                                                                                                                                                                                                                  一、電池的主要部件
                                                                                                                                                                                                                                                                                                                                  
                                                                                                                                                                                                                                                                                                                                  1、極板是蓄電池的核心部件,相當于蓄電池的“心臟”,其分為正極板、負極板。
                                                                                                                                                                                                                                                                                                                                  
                                                                                                                                                                                                                                                                                                                                  2、隔板作用在于隔離正、負極板,防止短路,可稱為“第三電極”。其作為電解液的載體,能夠吸收大量電解液,起到離子良好擴散(離子導電)的作用。對于密封免維護蓄電池來說,隔板還可作為正極板產生氧氣到達負極板的“通道”,使極板順利地建立氧循環,減少水損失。隔板式蓄電池實現免維護的關鍵在于采用超細玻璃纖維。
                                                                                                                                                                                                                                                                                                                                  
                                                                                                                                                                                                                                                                                                                                  3、電解液大部分是由純水與硫酸組成,配以一些添加劑混合而成。
                                                                                                                                                                                                                                                                                                                                  
                                                                                                                                                                                                                                                                                                                                  電解液主要作用在于兩個方面:一是參與電化學反應,是蓄電池的活性物質之一;二是起導電作用,蓄電池使用時通過電解液中離子的轉移,起到導電作用,使化學反應得以順利進行。
                                                                                                                                                                                                                                                                                                                                  
                                                                                                                                                                                                                                                                                                                                  4、安全閥是免維護鉛酸蓄電池關鍵部件之一,位于蓄電池頂部,它起到作用在四個方面:
                                                                                                                                                                                                                                                                                                                                  
                                                                                                                                                                                                                                                                                                                                 ?。?)安全作用,即當蓄電池使用過程中內部產生的氣體氣壓達到安全閥壓力,開閥將壓力釋放,防止產
                                                                                                                                                                                                                                                                                                                                  
                                                                                                                                                                                                                                                                                                                                 ?。?)密封作用,當蓄電池內壓低于安全閥的閉閥壓力時安全閥關閉,防止內部氣體酸霧往外泄露,同時也防止空氣進入電池造成不良影響。
                                                                                                                                                                                                                                                                                                                                  
                                                                                                                                                                                                                                                                                                                                 ?。?)確保免維護鉛酸蓄電池正常內壓,促使蓄電池內氧氣復合,減少失水。
                                                                                                                                                                                                                                                                                                                                  
                                                                                                                                                                                                                                                                                                                                 ?。?)防爆作用,某些安全閥裝有防酸發、防暴片。如松下蓄電池。
                                                                                                                                                                                                                                                                                                                                  
                                                                                                                                                                                                                                                                                                                                  此外,安全閥結構類型有很多,主要有帽式、傘狀、片狀等。常見的是由彈性較好的膠皮制作成帽式筏,其結構簡單,使用故障率也低,因此被廣泛采用。

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