【正文】 us batteries. Before use: the need to bolt on the exhaust of the blind hole pierced with wire in order to ensure smooth gas overflow.Second, the use of battery electric vehicles and maintenance (A), batteries installed Battery generally used in series, that is, the cathode of a battery with one battery connected to the anode, all the batteries together, and finally the remaining positive and negative terminals with the wiring connected to the corresponding electric vehicles, electric vehicle motor, controller, instruments such as the electricity load is a battery. Battery electric vehicles are generally box, from the installation location divided slashstyle, after the plug and the chassismounted, the shape of its structure can be varied. Each depot has its own electrical characteristics. Figure battery box generally made with engineering plastics, and its strength is better, lighter weight, ease of installation. General by the end of the battery box tank, roof, and charge the battery contact point socket, trams, etc. lock. Trough and fastens at the end of the superstructure, and selftapping fastening screws or bolts. Battery battery box is based on the design of model specification, the design should be considered in the whole of its good heat dissipation. (B), the rechargeable battery Battery is not bad but bad charge, this is not alarmist talk, the performance of good and bad battery life of the battery and use play a decisive role in performance, attention must be given. 1, the battery charging process on the requirements Rechargeable battery technology for understanding the basic requirements is to analyze the basis of charging technology. Rechargeable batteries of the basic requirements are: the charge current should be less than or equal to the battery charge current can be received. Otherwise, the current surplus would electrolyte consumed too quickly, resulting in the following hazards: Increased battery water loss, increased the maintenance workload for the maintenancefree batteries, can cause early battery failure。 produce mist, resulting in environmental pollution, health hazards to workers。 so charging efficiency, resulting in a serious waste of energy. Charging process of electrochemical reaction is the discharge process of the reverse reaction, if the charging process of electrochemical reaction in an ideal state, and this process should be plementary to each reverse reaction, that is filled with the release of the power of electricity should be basically the same. However, in a serious state of gas, the effective charge of the electrochemical reaction process power consumption of less than 40% of the total electricity consumption, that is a waste of energy more than 60%. Gathered gases within porous electrode in the battery to reduce the electrolyte and the porous electrode contact area, that is, the electrochemical reaction of the interface charge is drastically reduced, so that the speed of chemical reactions reduce the charge, the charge is very difficult to extend the charging time. Gas will be serious damage to the battery: ① a large number of gases have on the plate were washed active role of the active substance soft and easy to fall off. ② polarization at the higher voltage, the positive plate grid of serious corrosion, generation of Pb02, such structures and electrochemical corrosion Pb02 survival is pletely different, which is not reversible oxide, conductive poor and grid deformation, brittle fracture, the loss of the role of skeleton and conductivity. Should be in charge to prevent over charge as much as possible. Rechargeable longterm lack of response to the active substance did not produce irreversible positive large granular high PbS04 grain (that is, irreversible sulfation) to decrease battery capacity, internal resistance to increase, charging more difficult, resulting in early damage to the battery. Therefore, as far as possible to ensure sufficient battery power to prevent irreversible sulfation. 2, the frequency of the choice of charging Battery life cycle of the depth of the impact of large changes in the basic exponentially. This is because the positive active material for Pb02, the bination of fastness is not high, discharge time and charge into PbS04 into PbO2, and PbSO4 size larger than PbO2 (the volume ratio of about 2: 1). Therefore, the positive plate, the actives will be repeated contraction expansion to the connection between the particles gradually fell off, so that the loss of battery discharge characteristics actives bee anode mud so that the battery performance until the end of life. Deeper depth of discharge, the greater the amount of expansion contraction of activity in the greater destruction of binding force, the shorter life expectancy。 the other hand is the longer cycle life. In theory the battery should be avoided as far as possible the use of deep discharge, shall be sufficient ground shallow place, provided there is a special match with the matching charger. However, in actual use, due to battery performance and battery by the charger itself and the discrete charge and the charge used to the speed of the impact of higher than the voltage charger, charging more or less existed. In particular, the majority charge at night, generally in 610 hours, with an average of about eight hours, if shallow discharge, the charge will soon reach the end of the efficiency of this low charge will result in chargeoff. Have relatively long charging time, coupled with frequent charging, battery life would be a greater impact because of charge. According to the charging requirements of the best on the actual situation, it is necessary to refer to normal operating frequency, length, the storage battery factory provided, as well as supporting the development of charger performance parameters