Voltage measurement is carried out outside the battery. When measuring, the possibility of leakage is avoided and the possibility of spark generation is reduced by means of measuring points cast on the battery cover or other measuring points with an insulating cover. The value of insulation resistance can remain unchanged for a considerable period of time. The measured voltage is measured through a small hole on the negative pole filled with vaseline.
External insulation of batteries also considers the possibility of avoiding external short circuits caused by tools or other objects that violate operating procedures. The connection mode of conical connector can be welded or pressed. Any connection that may cause sparks cannot be used. Comparing with welding, the operation of pressing does not require skilled workers, and the quality of welding depends on whether the temperature of melting flux is properly controlled.
The battery cover and pole of explosion-proof battery are cast together, so it must be guaranteed that no leakage occurs. They can be regarded as a whole. The volume of the upper part of the cell increases, and the ribs of the lower part also increase. Battery case and microporous separator are made of heat-resistant and neutral materials. The sealing performance of the battery is improved, so the upper surface of the battery is dry and the water consumption is reduced accordingly.
Because no slit explosion-proof is used, not only the weight of explosion-proof battery box is reduced, but also the safety is increased. The cover of the battery box is divided into two sections, which can be rotated to both sides. Considering that the worker can easily open the lid of the box and install a spring weight-reducing mechanism. There is a triangular safety lock on each cover. The cover can not be opened at will to enhance safety. The inner surface of the case cover and the bottom of the battery case body are covered with acid-resistant rubber. The coating must maintain corrosion resistance and good insulation performance for a long time. Battery cases are equipped with bipolar or quadrupole plugs with 400 ampere switching switches. In addition, battery monitoring and recording instruments, such as charge and discharge time table, discharge time table and storage time table, are also equipped.