Battery management system and method

A battery management system, battery management technology, applied in battery circuit devices, arrangement of multiple synchronous batteries, battery/fuel cell control devices, etc., can solve the safety problems of damaged battery packs, failure to take protective measures in time, explosion or fire, etc.

Active Publication Date: 2012-01-11
AOTU ELECTRONICS WUHAN
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when filtering noise, there is a predetermined delay between when an error condition occurs and when it is detected by the battery management system
As a re

Method used

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  • Battery management system and method
  • Battery management system and method

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Embodiment Construction

[0022] A detailed description will be given below of embodiments of the present invention. While the invention will be described in conjunction with examples, it will be understood that it is not intended to limit the invention to these examples. On the contrary, the invention is intended to cover various alternatives, modifications and equivalents as defined within the spirit and scope of the invention as defined by the appended claims.

[0023] figure 1 Shown is a block diagram of a battery management system 130 according to one embodiment of the present invention. According to an embodiment of the present invention, the abnormal state of the battery cell, such as a micro-short circuit connection, is detected according to a plurality of parameters of the battery cell before the abnormal state develops into an error state, such as an overvoltage, overcurrent or overtemperature state. Therefore, compared with the prior art, the battery management system 130 has a stronger pr...

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Abstract

A battery management system and method for a battery pack that includes multiple battery cells are disclosed. The battery management system includes a detector coupled to the battery cells, multiple temperature sensors coupled to the battery cells, a current sensor coupled to the battery cells in series, and a processor coupled to the current sensor. The detector generates first monitoring signals corresponding to cell voltages across the battery cells. The temperature sensors generate second monitoring signals corresponding to temperatures of the battery cells. The current sensor generates third monitoring signals corresponding to currents of the battery cells. The processor determines whether an undesired condition is present according to the first, second, and third monitoring signals, wherein the processor calculates a plurality of factors according to the cell voltages and the combination of the temperature and the current upon detecting an abnormal condition if the summation of the multiple factors is larger than a threshold value. The battery management system and method is able to detect whether an undesired condition is present, and take protection measures, thus preventing the undesired condition from developing into a false state.

Description

technical field [0001] The present invention relates to a battery system, in particular to a battery management system and method. Background technique [0002] Battery packs or battery modules including a plurality of battery cells are used in various applications such as notebook computers, electric vehicles, hybrid vehicles, and energy storage systems. During operation, a battery cell may experience an error state, such as overvoltage, overcurrent, overtemperature, or a micro-short circuit inside the cell, thereby damaging the battery cell or causing safety problems, such as explosion or fire. [0003] The battery management system is used to detect the cell voltage, current and temperature of the battery cells, and if an error state occurs, the battery management system takes protective measures. However, when filtering noise, there is a predetermined delay between when an error condition occurs and when it is detected by the battery management system. Thus, protective...

Claims

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Application Information

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IPC IPC(8): H02J7/00H02H7/18
CPCB60L3/0046B60L2240/549B60L2240/545H02J7/0021B60L2240/547G01R31/36G01R31/52B60L58/18Y02T10/70H02J7/0013H02J7/0048H02J7/005
Inventor 栗国星
Owner AOTU ELECTRONICS WUHAN
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