Method and device for detecting state of health (SOH) of battery

A battery health status and detection method technology, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve the problems of short discharge time and difficulty in guaranteeing estimation accuracy

Inactive Publication Date: 2013-07-10
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But its disadvantage is that for the safety of site backup, the discharge time must be as short as possible, which makes it difficult to guarantee the estimation accuracy

Method used

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  • Method and device for detecting state of health (SOH) of battery
  • Method and device for detecting state of health (SOH) of battery
  • Method and device for detecting state of health (SOH) of battery

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Embodiment Construction

[0047] In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are disclosed. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0048] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. The following examples are intended to illustrate the present invention, but not to limit the scope of the present invention.

[0049] figure 1 A schematic diagram of the principle of the battery state of health detection me...

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Abstract

The invention discloses a method and a device for detecting a state of health (SOH) of a battery. The method includes the steps: an absorption capacity value or a discharge capacity value in any capacity interval in the process of normal charging or discharging of the battery is monitored; a current battery actual capacity value in the capacity interval is acquired through computation by utilizing the capacity value; and the specific value of the SOH of the battery is computed by utilizing the current battery actual capacity value and a battery rated capacity value. The device can detect the SOH of the battery by utilizing the method. According to the method and the device for detecting the SOH of the battery, the absorption capacity value or the discharge capacity value in a characteristic capacity interval in the process of normal charging or discharging of the battery is monitored to detect the battery current actual capacity value and the specific value of the SOH so as to detect the SOH of the battery, average and effectiveness of the battery actual capacity values and the specific value of the SOH are judged for a plurality of times to improve detection accuracy, and therefore detection of the SOH of the battery is achieved effectively.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a battery health state detection method and device. Background technique [0002] At present, with the vigorous development of electric vehicles and energy storage fields, more and more attention has been paid to the monitoring and protection of battery pack performance. The voltage, current, temperature, and single-cell consistency have already been realized. State Of Health) has achieved high-precision prediction, and the high-precision prediction of battery state of health SOH (State Of Health) and remaining capacity has become the next topic that must be overcome. The SOH ratio of the battery state of health is the percentage of the current actual capacity of the battery to the rated capacity. Of course, when the rated capacity of the battery is known, the current actual capacity of the battery can also reflect the state of health of the battery. The value of the SOC of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
Inventor 乐斌王兴杰欧阳明光
Owner HUAWEI TECH CO LTD
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