Vehicle-mounted voltage control system and control method thereof
A technology for controlling system and vehicle voltage, applied in battery/fuel cell control devices, vehicle components, electric vehicles, etc. It can solve the problems of circulating current, different voltages, and serious customization of battery packs in battery packs to improve flexibility. Effect
Pending Publication Date: 2022-06-17
BATTERO TECH CORP LTD
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Problems solved by technology
The SOC status of the same type of battery packs is different, and the voltage will also be different. Forcibly paralleling the output will cause a circulating current between the battery packs, so they cannot be connected in parallel to supply power to external devices.
In addition, for external devices with different input voltage ranges, the battery pack based on the existing technology needs to consider the voltage platform at the beginning of the design, which makes the customization of the battery pack serious.
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[0033] In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of them. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Unless otherwise defined, technical or scientific terms used herein should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. As used herein, "comprising" and similar words mean that the elements or things appearing before the word encompass the elements or things recited after the word and their equivalents, but do not exclude other elements or things.
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The invention provides a vehicle-mounted voltage control system and a control method thereof. The vehicle-mounted voltage control system comprises a battery pack, a power distribution part, a battery management part and a direct current conversion part. The power distribution part is electrically connected with the battery pack and the battery management part so as to change the communication relation between the power distribution part and the battery pack under the control of the battery management part, and the direct current conversion part is electrically connected with the battery management part and the power distribution part so as to assist the battery management part to realize closed-loop control on the battery pack. Therefore, the charging voltage and the output voltage of the battery pack are dynamically controlled, the flexibility of a battery pack grouping scheme is improved, and adaptable scenes are more diversified.
Description
technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to a vehicle-mounted voltage control system and a control method thereof. Background technique [0002] As the lithium-ion battery changes with the depth of discharge, the cell voltage will change within a certain voltage range, resulting in a change in the overall voltage of the battery pack within a certain range. If two battery packs with different SOCs or different numbers of strings are connected in parallel, a circulating current phenomenon will occur. [0003] Based on the prior art battery pack grouping scheme, most of them are paralleled first and then connected in series. The number of battery cells and the chemical system are determined, and the voltage platform is also determined accordingly. The SOC state of the same type of battery pack is different, and the voltage will also be different. Forcing parallel output will cause a circulating current between th...
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IPC IPC(8): B60L58/10
CPCB60L58/10Y02T10/70
Inventor 包晗郑琳张五堂刘勇孙世强
Owner BATTERO TECH CORP LTD