Series-parallel connection switching control device among battery packs

Abstract

The invention relates to a series-parallel connection switching control device among battery packs, which is characterized by comprising a knob (1) connected with a rotary disc (3) through a transmission mechanism (2); and a plurality of contacts (30) are arranged on the rotary disc (3) and connected with at least two groups of battery block terminals (4). The device can switch series-parallel connection among at least two groups of batteries, so that the serial battery packs are charged directly by electric supply current and parallel battery packs supply power to an electromobile; and the device can charge the batteries without adopting an extra transformer, is skillful in design, simplifies the charging procedure of the batteries and reduces the electric energy loss.

Description

【Technical field】 [0001] The invention relates to a series-parallel switching control device between battery packs. 【Background technique】 [0002] Due to its high energy density, large specific power and long cycle life, lithium-powered battery packs have attracted close attention in the field of electric vehicles including hybrid vehicles. More and more electric vehicles have begun to use lithium-powered batteries as power sources, especially Lithium-ion and lithium-polymer batteries have the characteristics of light weight, large capacity, and small internal resistance, so they are widely used, but they are easily damaged. If the charging characteristics of lithium-ion batteries are not followed, the rechargeable times will be greatly reduced. greatly reduce its service life. [0003] Under normal circumstances, multiple battery packs of electric vehicles are charged and discharged in parallel, especially when charging, taking a 48V power supply battery pack as an exampl...

AI Technical Summary

Problems solved by technology

[0002] Due to its high energy density, large specific power and long cycle life, lithium-powered battery packs have attracted close attention in the field of electric vehicles including hybrid vehicles. More and more electric vehicles have begun to use lithium-powered batteries as power sources, especially Lithium-ion and lithium-polymer batteries have the characteristics of light weight, large capacity, and small internal resistance, so they are widely used, but they are easily damaged. If the charging characteristics of lithium-ion batteries are not followed, the rechargeable times will be greatly reduced. greatly reduce its service life

[0003] Under normal circumstances, multiple battery packs of electric vehicles are charged and discharged in parallel, especially when charging, taking a 48V power supply battery pack as an example, its maximum charging voltage is 57.5V. It is far higher than the maximum charging voltage of a single power supply battery pack. In this way, the 220V AC power needs to be rectified and stepped down through the transformer to be output to charge the power supply battery pack. The rectification and step-down process will be accompanied by power loss, resulting in loss of electrical energy

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