Parallel charging module and DC screen system applying same

Abstract

The invention discloses a parallel charging module which comprises an electromagnetic compatibility (EMC) part, a 1 # AC / DC converter, 2 # AC / DC converters, a DC / DC converter and a DSP control chip. The parallel charging module can form a double-hybrid DC screen system together with an existing module and high-low voltage battery packs, and can also independently and flexibly form DC screens in various forms. The parallel charging module is provided with two AC / DC converters and one DC / DC converter; under the condition that alternating current input exists, power can be supplied to a load, andthe high-voltage battery pack and the low-voltage battery pack are charged at the same time; and under the condition that no alternating current input exists, the low-voltage battery pack can also charge the high-voltage battery pack and supply power to the load through the DC / DC converter. The parallel charging module adopts full-digital DSP control, and realizes one chip can control a pluralityof converters at the same time.

Description

technical field [0001] The invention relates to a parallel charging module and a DC screen system using the parallel charging module. Background technique [0002] The traditional DC screen adopts centralized power supply mode, and the charging module (referred to as the existing module in this patent) can charge a group of 220V or 110V battery packs (referred to as high-voltage battery packs in this patent), and provide DC power for the load at the same time. like figure 1 As shown as an example, the system has two existing modules 10 and one high-voltage battery pack 6 connected in parallel, and the existing module 10 has only one AC / DC converter, which can only be used as a high-voltage battery when there is an AC input. The group 6 performs charging and the load 7 supplies power, and the existing module 10 is controlled by an analog chip, not a digital DSP chip. The system mainly has the following defects: the system is complex, bulky, and heavy; when there is no AC in...

AI Technical Summary

Problems solved by technology

The system mainly has the following defects: the system is complex, bulky, and heavy; when there is no AC input and an open circuit fault occurs in a battery, the load will have a power supply interruption problem, and the reliability is low; the battery pack is composed of multiple batteries connected in series , making it extremely inconvenient to check the validity of each battery, increasing the workload of equipment maintenance

[0006] The above two research and development designs are all replacement improvements to the traditional DC panels. However, in fact, there are still a large number of switch stations that are difficult to replace and transform, and more supplementary improvements are needed.

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