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A method and device for power detection and control of a rechargeable battery

A technology for rechargeable batteries and power, which is applied to measuring devices, measuring electrical variables, measuring electricity, etc., can solve problems such as low measurement accuracy, and achieve the effect of wide application prospects

Active Publication Date: 2011-11-30
BYD SEMICON CO LTD
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Problems solved by technology

[0008] The problem solved by the present invention is the relatively low measurement accuracy of the method for estimating battery power in the prior art

Method used

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  • A method and device for power detection and control of a rechargeable battery
  • A method and device for power detection and control of a rechargeable battery
  • A method and device for power detection and control of a rechargeable battery

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Embodiment Construction

[0017] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0018] According to the power detection and control method of the rechargeable battery according to the embodiment of the present invention, the general flow is as follows figure 1 As shown, its main steps include: detecting the changing power of the rechargeable battery in the current time period to update the accumulated changing power, and obtaining the actual remaining power of the battery in the current time period according to the absolute capacity of the battery and the accumulated changing power; according to the actual remaining power of the battery The battery ...

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Abstract

The invention discloses an electric quantity detection method for a chargeable battery. The method mainly comprises the following steps: detecting a change electric quantity of a chargeable battery at present time segment to updating an accumulated change electric quantity, and according to a battery absolute capacity and the accumulated change electric quantity, obtaining a battery actual residual electric quantity at present time segment; according to the battery actual residual electric quantity and the battery absolute capacity, updating present internal resistance potential drop of the battery; according to the present internal resistance potential drop, determining capacity correction threshold-voltage; according to the capacity correction threshold-voltage and the accumulated change electric quantity, calibrating a battery full charge available electric quantity and a battery residual available electric quantity at next time segment. The electric quantity detection method has the advantages of high precision, convenience of realization and the like. Correspondingly, the invention also discloses an electric quantity detection method for a chargeable battery. The apparatus comprises a detection module, an internal resistance potential drop updating module, a threshold-voltage calibration module and an electric quantity calibration module, and has the advantages of convenient operation, high measuring precision and the like.

Description

technical field [0001] The invention relates to the field of battery detection and control, in particular to a method and device for detecting and controlling the electric quantity of a rechargeable battery. Background technique [0002] Rechargeable batteries are widely used in portable electronic products. Because they can be used repeatedly, they have the advantages of high efficiency, energy saving and environmental protection. Degradation will cause the capacity of the battery to gradually decrease, which will affect the working state of the battery. Therefore, accurate detection and regulation of battery power is one of the important factors to ensure the normal operation of electronic products. [0003] At present, rechargeable batteries made of materials such as Li and Fe have the advantages of short charging time, stable working performance, good safety, and long service life, and are mainstream products in the market. According to the charging and discharging cond...

Claims

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Application Information

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IPC IPC(8): G01R31/36
Inventor 郭左兴李扬张海斌刘成军项春亮
Owner BYD SEMICON CO LTD
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