Charging system with dynamic follow-up of battery internal resistance and charge acceptance

Abstract

The invention discloses a charging system for dynamic follow-up of battery internal resistance and charging acceptance capacity, which includes a single-chip general control, a battery charging control unit, and a battery; the single-chip general control is configured to control the battery circuit of the battery charging control unit. The battery can be charged in series mode or parallel mode, and the two modes can be charged at the same time, or can be switched to charge independently. The battery charging control unit is configured with a single-chip microcomputer control unit n, a measurement adjustment unit n, a charging power supply n, a voltage adjustment n, and an electronic switch n. The present invention switches to the serial fast mode when the battery’s power receiving capacity is the largest, so that the battery can be charged quickly and safely; the present invention can dynamically measure the actual internal resistance and power receiving capacity of the battery, and follow the The charging process of the parallel independent charging structure is adjusted according to the internal resistance and the power receiving capacity, so that each battery can be fully charged independently and stop charging.

Description

technical field [0001] The invention relates to a battery charger, in particular to a charging system which dynamically follows the internal resistance of the battery and the charging acceptance capacity. Background technique [0002] With the development of society, electric bicycles have become a popular means of transportation. At present, electric vehicles powered by lead-acid batteries account for the vast majority. The normal service life of lead-acid batteries produced by battery manufacturers is 200-300 cycles, and the warranty period is one year. Electric vehicle charging has a series charging mode in which the positive and negative two lines are connected in series to charge the whole group, and a parallel charging mode in which multiple lines are connected in parallel and independently charged. The series mode is widely used because the circuit is simple and easy to realize, and the cost is very low. The biggest disadvantage of the series charging mode is that t...

AI Technical Summary

Problems solved by technology

The biggest disadvantage of the series charging mode is that the weakest batteries in the entire battery pack are the most likely to be damaged

However, different batteries have different power-receiving capacities, and the power-receiving capacity of batteries at different times during the charging process will also change at any time. It is difficult to achieve true safety if only simple constant current, constant voltage, and multi-stage charging methods are used to charge the battery. fast full charge

Since the entire set of batteries of an electric vehicle is powered by a series structure, if multiple independent chargers are connected in parallel to the entire set of batteries with a series structure, during the charging process, each charger will generate power to the adjacent chargers. A lot of interference voltage makes it not work properly

Therefore, there is still no mature electric vehicle charger with parallel independent charging mode on the market at present.

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