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System and method for rapidly detecting state of charge of soft package lithium ion battery

A technology of lithium-ion batteries and soft-packed lithium batteries, which is applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve the problems of complicated calculation methods and steps, and achieve the effect of solid data support, simple device, and no calculation steps.

Pending Publication Date: 2021-02-19
WANXIANG 123 CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0009] The present invention mainly solves the technical problem of cumbersome steps in the original method for calculating the state of charge of a lithium-ion battery, and provides a system and method for quickly detecting the state of charge of a soft-pack lithium-ion battery, which is not affected by the charging and discharging voltage platform Efficiently predict the battery SOC, and the device used is simple and easy to operate, which is easy to promote to large-scale mass production and different types of graphite-based soft-pack lithium battery systems

Method used

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  • System and method for rapidly detecting state of charge of soft package lithium ion battery
  • System and method for rapidly detecting state of charge of soft package lithium ion battery

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Embodiment

[0033] Embodiment: a kind of system and the method for rapidly detecting the state of charge of the soft pack lithium-ion battery of the present embodiment, such as figure 1 As shown, it includes a pressure sampling module 1, a data transmission module 2, a data processing module 3 and a display module 4 connected in sequence. The pressure sampling module 1 is connected to a power supply module 5, and the power supply module provides energy for the pressure sampling module and the data transmission module. In order to realize the collection and transmission of pressure data. The data processing module 3 is connected to the alarm module 6 , and the data processing module 3 , the display module 4 and the alarm module 6 are arranged in the terminal 7 .

[0034] like figure 2 As shown, the pressure sampling module 1 includes an upper splint 1.1 and a lower splint 1.2, a soft lithium battery 1.4 is provided between the upper splint 1.1 and the lower splint 1.2, and a pressure sen...

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Abstract

The invention discloses a system and method for rapidly detecting the state of charge of a soft package lithium ion battery. The system comprises a pressure sampling module, a data transmission module, a data processing module and a display module which are connected in sequence; the pressure sampling module is connected with a power supply module, and the data processing module is connected withan alarm module. The method comprises the steps: adjusting the fastening bolt to a set value; measuring the open-circuit pressure corresponding to different states of charge; performing charging by adopting a specific multiplying power at a specific temperature, wherein the multiplying power is the same as the multiplying power when the open-circuit pressure is calibrated; and determining the state of charge by measuring pressure data. According to the technical scheme, the SOC of the battery is efficiently predicted on the basis of not being influenced by a charging and discharging voltage platform, and the adopted device is simple, easy to operate and convenient to popularize to graphite-based soft package lithium battery systems with large-scale mass production and different models.

Description

technical field [0001] The invention relates to the field of lithium battery state detection, in particular to a system and method for quickly detecting the state of charge of a soft-pack lithium ion battery. Background technique [0002] As the world's primary energy shortage and environmental pollution become more and more serious, electric vehicles have become a major trend to replace fossil fuel vehicles. An efficient, stable and safe power battery management system is a key technology for the development of electric vehicles. However, the battery management technology is still far from mature, especially the estimation of the battery State of Charge (SOC) cannot meet the accuracy requirements. [0003] According to data, battery state-of-charge estimation is one of the main functions of the battery management system. Accurate SOC estimation can not only reflect the cruising range, give full play to battery performance, but also ensure battery safety and prolong service...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/382G01R31/385
CPCG01R31/382G01R31/385
Inventor 王勇韩笑李凡群张厚泼王朋建胡江生
Owner WANXIANG 123 CO LTD
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