Electric quantity detecting and controlling method and device for rechargeable battery

A technology for rechargeable batteries and power, applied in battery circuit devices, measuring devices, circuit devices, etc., can solve problems such as error increase, and achieve the effect of wide application prospects

Active Publication Date: 2011-06-22
上海诺昂汽车技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after multiple cycles of current accumulation, the error will increase, and when the battery usage environ

Method used

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  • Electric quantity detecting and controlling method and device for rechargeable battery
  • Electric quantity detecting and controlling method and device for rechargeable battery
  • Electric quantity detecting and controlling method and device for rechargeable battery

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Embodiment Construction

[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0016] 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 updating the remaining usable power in the current time period according to the initial value of the remaining usable power and the changing power in the current time period; according to the remaining Update the current internal resistance of the battery based on the available power and the full-charge available power in the current time period; determine the capacity calibration threshold voltage according to the current internal resistance; calibrate the initial value of the full-charge availab...

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Abstract

The invention discloses an electric quantity detecting and controlling method and an electric quantity detecting and controlling device for a rechargeable battery. The method comprises the following steps of: detecting an electric quantity change of the rechargeable battery in a current time period to update a cumulative electric quantity change; updating remaining available electric quantity in the current time period according to a remaining available electric quantity initial value and the electric quantity change in the current time period; updating the current internal resistance of the battery according to the remaining available electric quantity and the fully-charged available electric quantity in the current time period; determining a capacity-calibrated threshold voltage according to the current internal resistance; and calibrating the fully-charged available electric quantity and the remaining available electric quantity initial value in a next time period according to the threshold voltage and the accumulative electric quantity. The electric quantity detecting and controlling method has the advantages that: the precision is high, the method is convenient to implement and the like. Correspondingly, the electric quantity detecting and controlling device comprises a detection module, an internal resistance update module, a threshold voltage calibration module and an electric quantity calibration module, and has the advantages that: the device is convenient and simple to operate, the measurement precision is high 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): H02J7/00G01R31/36
Inventor 郭左兴梁善武张海斌李扬
Owner 上海诺昂汽车技术有限公司
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