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Method for checking and modulating battery capacity and power based on discharging/charging characteristics

A technology of charging and discharging characteristics and capacity, which is applied in the field of battery management and can solve problems such as battery damage

Active Publication Date: 2012-05-30
KYMCO
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Problems solved by technology

If you want to use a higher charging current, it is easy to have a rapid change in its voltage, at this time, it may cause damage to the battery
Therefore, there are still problems to be improved in the current charging and discharging mode of the battery

Method used

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  • Method for checking and modulating battery capacity and power based on discharging/charging characteristics
  • Method for checking and modulating battery capacity and power based on discharging/charging characteristics
  • Method for checking and modulating battery capacity and power based on discharging/charging characteristics

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Embodiment Construction

[0057] Due to the current battery charging and discharging mode that is commonly used today, the battery may cause drastic voltage changes and generate a lot of heat due to sudden and rapid changes in battery internal resistance during charging and discharging. Long-term operation under this condition will accelerate battery aging and performance degradation. Therefore, the following embodiments propose a method of monitoring the capacity and power through the charging and discharging characteristics of the battery, so that the battery can be discharged or charged within a selected operating range.

[0058] During the battery discharge process, it is not easy for the voltage to drop sharply, which helps to improve the service life of the battery. The following examples will accompany Figure 1A and figure 2 The relationship between the output capacity and the voltage of the battery shown in the discharge process is explained.

[0059] Generally speaking, after each battery i...

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Abstract

A method for checking and modulating battery capacity and power based on charging / discharging characteristics is provided. In terms of discharge, a relationship between an open circuit voltage and an output electric capacity of a battery is measured to obtain a first characteristic curve. A relationship between a voltage and the output electric capacity of a battery at a predetermined maximum charge / discharge current rate is measured to obtain a second characteristic curve. A characteristic boundary line passing the first and the second characteristic points respectively selected from the first and the second characteristic curves is established. A voltage value corresponding to the first characteristic point is higher than a voltage value corresponding to the second characteristic point. The first and the second characteristic curves, and the characteristic boundary line define an operation range. The battery is charged / discharged within the operation range. According to the above discharge control logic, a charge mode also can be used indiscriminately.

Description

technical field [0001] The invention relates to a battery management method, and in particular to a method for detecting and controlling the capacity and power through the charge and discharge characteristics of the battery. Background technique [0002] In today's information society, human beings are increasingly dependent on electronic products. In order to meet the requirements of portability and not occupying space, the development trend of various portable electronic devices and electric vehicles is to develop in the direction of high speed, high efficiency, low energy consumption, and simple and thin, such as Portable electronic devices such as notebook computers, cell phones (Cell Phone), personal digital assistants (Personal Digital Assistant, PDA) and tablet computers (Tablet PC), and electric vehicles such as electric bicycles and electric vehicles. At present, both portable electronic devices and electric vehicles use batteries as their power supply units. From...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
CPCG01R31/3651G01R31/362G01R31/367G01R31/3835
Inventor 凌守弘孙建中赖秋助
Owner KYMCO
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