Power supply protection method and device for battery pack
A battery pack and power supply protection technology, applied in battery circuit devices, emergency protection circuit devices, circuit devices, etc., can solve problems such as failure of battery pack power supply guarantee, and achieve the effect of ensuring reliability and improving performance
Active Publication Date: 2017-11-03
重庆雅讯科技有限公司 +1
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[0004] Since the battery pack is composed of multiple single cells connected in series, once any one of the single cells has an unrecoverable problem (for example, failure or disconnection, etc.), the overall power supply guarantee of the battery pack will fail
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[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.
[0024] Considering that an abnormality of one batter...
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The invention provides a power supply protection method and device for a battery pack. Wherein, the method includes: when the battery pack starts to discharge, start the mirror node of each single battery in the battery pack to output the initial voltage; wherein, each single battery is connected in parallel with a mirror node, and the initial voltage of each mirror node is the same as the corresponding Match the type of the single battery; monitor whether there is any abnormality in each single battery; if so, start the mirror node of the abnormal single battery as a voltage source to continue supplying power; update the abnormal single battery according to the rated voltage of the single battery if not, update the voltage of the mirror node of each single battery according to the rated voltage of the single battery. Through the present invention, the problem of failure of the overall power supply of the storage battery group due to problems with single cells in the storage battery group is alleviated.
Description
technical field [0001] The invention relates to the field of power electronics, in particular to a power supply protection method and device for a battery pack. Background technique [0002] The power supply consisting of multiple batteries connected in series is called a battery pack. The batteries are divided into lead-acid batteries, nickel-metal hydride batteries, etc. The battery packs are usually used in communication engineering systems. [0003] The DC power system used in the communication room and the base station is 48V, and most of the battery packs use a single voltage of 2V*24 to form a battery pack. However, due to the limited space of the base station, a single battery pack with a voltage of 12V*4 is used to form a battery pack. Single batteries are used in series, the performance of each battery is not exactly the same, and a slight difference in voltage is normal. Generally, the voltage of a 2V single battery is between 1.80 and 2.2V. When the battery is...
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IPC IPC(8): H02J7/00H02H7/18
Inventor 李锐龙江涛张颖超钱希森张瑞伟程立何俊强
Owner 重庆雅讯科技有限公司