Battery liquid injection hole sealing structure

The utility model relates to a battery liquid injection hole sealing structure which comprises a battery cover plate (1), a sealing nail (2) and a fixing piece (3), a liquid injection hole (4) is formed in the battery cover plate (1), and the fixing piece (3) is fixed on the battery cover plate (1) and partially covers the liquid injection hole (4); the sealing nail (2) is arranged below the fixing piece (3) and comprises a head part (21), a rod part (22) and an inverted buckling part (23) which are sequentially arranged, and the rod part (22) is in interference fit with the liquid injection hole (4). Compared with the prior art, the utility model has the advantages of low cost, low welding and sealing reject ratio, capability of supplementing electrolyte and the like. 本实用新型涉及一种电池注液孔密封结构，包括电池盖板(1)、密封钉(2)和固定件(3)，所述的电池盖板(1)上开设有注液孔(4)，所述的固定件(3)固定在电池盖板(1)上，部分覆盖注液孔(4)；所述的密封钉(2)设置在固定件(3)下方，包括依次设置的头部(21)、杆部(22)和倒扣部(23)，所述的杆部(22)与注液孔(4)过盈配合。与现有技术相比，本实用新型具有成本低、焊接和密封不良率低且可补充电解液等优点。