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Rechargeable battery lithium separation detection method, battery management system and battery system

A battery management system and technology for rechargeable batteries, which are applied in secondary battery testing, secondary battery repair/maintenance, and electricity measurement, etc., can solve the problems of low efficiency and complicated operation in detecting lithium precipitation, so as to avoid lag in judgment results, Solve the complex operation and avoid the effect of complex operation

Active Publication Date: 2016-08-17
CONTEMPORARY AMPEREX TECH CO
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of this, an embodiment of the present invention provides a detection method for rechargeable battery lithium analysis, a battery management system, and a battery system to solve the complicated operation and the efficiency of detection of lithium analysis in the prior art when detecting rechargeable battery lithium analysis. lower question

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  • Rechargeable battery lithium separation detection method, battery management system and battery system
  • Rechargeable battery lithium separation detection method, battery management system and battery system
  • Rechargeable battery lithium separation detection method, battery management system and battery system

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Embodiment 1

[0054] The embodiment of the present invention provides a detection method for rechargeable battery lithium analysis, please refer to figure 1 , which is a schematic flow chart of the detection method for rechargeable battery lithium analysis provided by the embodiment of the present invention, such as figure 1 As shown, the method includes the following steps:

[0055] S101. During the pulse charging process of the rechargeable battery, detect the charging voltage and state of charge of the rechargeable battery, and use the charging voltage of the rechargeable battery as a first voltage.

[0056] In the embodiment of the present invention, when the rechargeable battery undergoes pulse charging, real-time detection of the charging voltage and state of charge of the rechargeable battery is started, in order to judge in real time whether the rechargeable battery has undergone lithium deposition during the pulse charging process. Specifically, the detected charging voltage of th...

Embodiment 2

[0088] Based on the detection method of rechargeable battery lithium analysis provided by the above-mentioned embodiment one, please refer to image 3 , which is a schematic diagram of the relationship between the voltage and state of charge of the rechargeable battery during another pulse charging process provided by the embodiment of the present invention, and the embodiment of the present invention is a specific implementation method of the first embodiment.

[0089] When the rechargeable battery is discharging and outputting energy, a pulse charging process occurs, such as image 3 As shown, curve 1 is the OCV curve of the rechargeable battery, and the discharge of the rechargeable battery corresponds to image 3 In the AB section of the curve, the rechargeable battery is pulse charged at point B, and the pulse charging process corresponds to image 3 The BC segment curve in . Suppose the SOC state of point B is 30%, and the SOC state of point C is 40% at the end of puls...

Embodiment 3

[0091] Based on the detection method of rechargeable battery lithium analysis provided by the above-mentioned embodiment one, please refer to Figure 4 , which is a schematic diagram of the relationship between the voltage and the state of charge in another pulse charging process provided by the embodiment of the present invention, and the embodiment of the present invention is a specific implementation method of the first embodiment.

[0092] When the rechargeable battery is being charged slowly, a pulse charging process occurs, such as Figure 4 As shown, curve 1 is the OCV curve of the rechargeable battery, and the slow charging process of the rechargeable battery corresponds to Figure 4 In the DE section curve, the rechargeable battery is pulse charged at point E, and the pulse charging process corresponds to Figure 4 The EF segment curve in . Figure 4 The SOC state at point E in the middle is 78%, and the SOC state at point F at the end of pulse charging is 86%. Rea...

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Abstract

The embodiment of the invention provides a rechargeable battery lithium separation detection method, a battery management system and a battery system. On one hand, charging voltage and the charge state of a rechargeable battery are detected in the pulse charging process of the rechargeable battery, the charging voltage of the rechargeable battery serves as first voltage, a voltage value corresponding to the charge state is obtained from the corresponding relation between an open-circuit voltage and the charge state to serve as second voltage, and accordingly whether lithium separation happens to the rechargeable battery in the pulse charging process is judged according to the first voltage and the second voltage. Thus, the technical scheme is used for solving the problems that in the prior art, operation is complex when the lithium separation condition of the rechargeable battery is detected, and efficiency for detecting the lithium separation condition is low.

Description

【Technical field】 [0001] The invention relates to the technical field of batteries, in particular to a detection method for lithium analysis of a rechargeable battery, a battery management system and a battery system. 【Background technique】 [0002] Lithium-ion battery is the latest generation of green high-energy rechargeable battery, which has outstanding advantages such as high voltage, high energy density, good cycle performance, small self-discharge, and no memory effect. It has been developed rapidly in recent years. A large number of electronic products such as handheld devices and notebook computers use lithium-ion batteries. Hybrid vehicles and pure electric vehicles use lithium-ion power batteries in large quantities. Aircraft, satellites, space probes and other fields have also begun to use lithium-ion batteries as energy storage equipment. In the field of power battery applications, braking energy recovery is one of the important technologies of modern electric v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36H01M10/42
CPCG01R31/378H01M10/4285Y02E60/10
Inventor 魏臻王宇曦许金梅蒋治亿张凯
Owner CONTEMPORARY AMPEREX TECH CO
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