Temperature self-adaptive over-discharge alarm control method for high-voltage lithium ion battery

A technology of a lithium-ion battery and a control method, applied in the field of lithium-ion battery management, can solve the problems of requiring manual intervention on the ground, large temperature influence, etc., and achieve the effects of easy engineering implementation, lightening of the burden, and clear logic.

Active Publication Date: 2020-07-14
SHANGHAI INST OF SPACE POWER SOURCES
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Problems solved by technology

It solves the problem that the traditional over-discharge alarm method is greatly affected by temperature or requires manual intervention on the ground, avoids false alarms or under-alarms that may exist when high-voltage lithium-ion batteries work in a wide temperature range, and improves the environmental adaptability of over-discharge alarms and autonomy, can effectively prolong the service life of lithium-ion batteries

Method used

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  • Temperature self-adaptive over-discharge alarm control method for high-voltage lithium ion battery
  • Temperature self-adaptive over-discharge alarm control method for high-voltage lithium ion battery
  • Temperature self-adaptive over-discharge alarm control method for high-voltage lithium ion battery

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Embodiment

[0043] A high-voltage lithium-ion battery temperature adaptive over-discharge alarm control method, comprising the following steps:

[0044] In the first step, the operating temperature range of the lithium-ion battery [T 0 ,T k ) is divided into k different intervals [T 0 ,T 1 ), [T 1 ,T 2 )……[T k-1 ,T k ), according to the lithium-ion battery capacity detection and discharge curves under different temperature conditions, set the over-discharge alarm point corresponding to each temperature range as V L1 , V L2 ...V Lk ;

[0045] The second step is to use the lower computer system to collect the voltage and temperature of the lithium-ion battery in real time, and obtain the temperature parameter T of the lithium-ion battery a1 , T a2 ...T am and monomer voltage parameter V 1 , V 2 ...V n ;

[0046] In the third step, the collected temperature parameter T a1 , T a2 ...T am Sort from small to large, and get the average value T of the m / 2 parameters in the midd...

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Abstract

The invention discloses a temperature self-adaptive over-discharge alarm control method for a high-voltage lithium ion battery. The problem that a traditional over-discharge alarm method does not consider the influence of temperature on battery capacity and an over-discharge alarm point or needs ground manual intervention is solved. The temperature of the lithium ion storage battery pack and the voltage of the battery monomer are automatically detected through the lower computer; a multi-stage temperature interval control method is adopted; an over-discharge alarm point corresponding to the temperature of the battery can be automatically identified without human intervention, self-adaptive over-discharge alarm control is realized, the situation that the high-voltage lithium ion battery needs manual intervention or mistaken (under) over-discharge alarm exists when the high-voltage lithium ion battery works in a wide temperature range is avoided, and the environmental adaptability and autonomy of over-discharge alarm are improved.

Description

technical field [0001] The invention relates to a high-voltage lithium-ion battery temperature self-adaptive over-discharge alarm control method, which is especially suitable for the over-discharge alarm protection of high-voltage lithium-ion battery packs used in spacecraft under the condition of wide temperature range, and belongs to the technical field of lithium-ion battery management. Background technique [0002] Because lithium-ion batteries have the advantages of wide operating temperature range, high specific energy, low self-discharge rate, and high safety, they have become mainstream energy storage batteries and are widely used in the aerospace field. Voltage and high-capacity requirements are generally solved by the series-parallel combination of multiple battery cells. As an important part of the power supply system, the high-voltage lithium-ion battery pack undertakes an extremely important task. The area provides safe, reliable and stable power for the spacecr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00G01R31/382H01M10/44
CPCG01R31/382H01M10/443H01M10/441Y02E60/10
Inventor 朱超陈启忠吉裕晖涂浡陈彦如王振绪黄峥江洁非王颜
Owner SHANGHAI INST OF SPACE POWER SOURCES
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