First, constant current section: when the battery voltage is low, in order to avoid excessive charging current damage to the battery, the charging current should be limited to not be too large, and in order to shorten the charging time, the maximum allowable charging current should be used to charge. The constant current charging stage is the main charging stage, and the battery has been charged with about 85~90% of the electricity.

　　Second, constant voltage section: maintain this constant voltage to charge the battery, in the constant voltage charging process, the battery voltage will be higher and higher, the current is smaller and smaller, when the charging current drops, the constant voltage charging ends.

　　Third, floating charging stage: floating charging stage is actually constant voltage charging, the charging voltage at this stage is generally controlled around ~, the charging current is slightly larger than the self-discharge current, generally about ~. With trickle charging, the battery can be charged to close to 100%.

　　Lead-acid battery description

　　For example, 6-QW-100-D 6-QA-14 6-QA-36

　　6 represents the number of batteries in series, each 2V is 12V; Q represents the start type battery; M is for motorcycle battery; JC is a Marine battery; HK is an aviation battery; D stands for electric vehicle battery; F stands for valve-controlled battery; A is a dry-charged battery; H is a wet-charged battery; Not marked as an ordinary battery; W indicates whether maintenance is required. W is maintenance-free; S is for less maintenance. ; 100 indicates that the battery capacity is 100Ah. D means good low temperature start-up; HD stands for high vibration resistance; DF indicates reverse loading at low temperature.

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