Quick-charging and safe low-temperature lithium ion battery and manufacturing method thereof

A lithium-ion battery, fast charging technology, applied in the direction of non-aqueous electrolyte battery electrodes, secondary batteries, battery electrodes, etc., can solve problems such as limited degree, to improve compaction density and surface density, increase contact area, reduce migration effect of distance

Inactive Publication Date: 2020-07-03
LONG POWER SYST NANTONG CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the degree of improvement in low-temperature electrochemical performance is limited only from the improvement of electron migration.

Method used

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  • Quick-charging and safe low-temperature lithium ion battery and manufacturing method thereof
  • Quick-charging and safe low-temperature lithium ion battery and manufacturing method thereof
  • Quick-charging and safe low-temperature lithium ion battery and manufacturing method thereof

Examples

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Embodiment Construction

[0037] Such as figure 1 , 2 , 3, a fast-charging and safe low-temperature lithium-ion battery, the lithium-ion battery is mainly composed of a positive electrode sheet, a negative electrode sheet, a ceramic diaphragm, a high-low temperature electrolyte and a battery case, and the low temperature is less than -45°C , the high-rate fast charging refers to the charging performance at different rates under different temperature conditions; The combination of positive electrode sheet, ceramic diaphragm, negative electrode sheet and ceramic diaphragm is formed by winding; the ceramic diaphragm 2 is located between the positive electrode sheet 9 and the negative electrode sheet 8; the positive electrode sheet 9 includes nano-microporous carbon-coated aluminum mesh 7, nano-micro The surface of the hole carbon-coated aluminum mesh 7 is provided with a positive electrode coating 1; the negative plate 8 includes a nano-microporous copper mesh 4, and the surface of the nano-microporous c...

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Abstract

The invention discloses a quick-charging and safe low-temperature lithium ion battery and a manufacturing method thereof. The battery is prepared by putting a dry battery cell into a shell, injectingelectrolyte, forming, sealing and grading capacity, and the dry battery cell is formed by winding a positive plate, a ceramic diaphragm, a negative plate and a ceramic diaphragm. The positive/negativeelectrode active substance is secondary micron particles formed by primary nanoparticles, and the nanoscale particles can effectively shorten the migration distance of lithium ions and improve the migration speed of the lithium ions in the charging and discharging process of the battery. Meanwhile, the multiple tabs led out from the positive and negative plates of the dry battery cell are gathered and then are welded with the planar metal sheet current collector to form a full tab. The internal resistance and the temperature rise of the battery in the charging process are effectively reduced,the problem of high-rate quick charging of the battery is solved, the high-current charging and discharging performance of the battery is improved, and the safety stability and the low-temperature electrochemical performance of the battery are also improved.

Description

technical field [0001] The invention relates to the technical field of power and energy storage lithium-ion secondary batteries, in particular to a fast-charging and safe low-temperature lithium-ion battery and a manufacturing method thereof. Background technique [0002] Lithium-ion batteries have the advantages of high working voltage, high specific energy, long charge and discharge life, low self-discharge rate and no memory effect, making them more and more widely used in civilian markets such as portable electronic devices and power tools. However, its poor low-temperature performance, fast charge-discharge performance and safety and stability performance limit its application in special fields such as aviation, aerospace, special communications, polar expeditions and military affairs. For example, the low-temperature fast charging performance of current lithium-ion batteries, especially in low-temperature environments below -40°C, is poor, mainly manifested in low char...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M4/13H01M4/62H01M2/16H01M10/0587H01M10/0568H01M10/0569H01M50/431
CPCH01M10/0525H01M4/13H01M4/62H01M10/0587H01M10/0568H01M10/0569H01M50/431Y02E60/10Y02P70/50
Inventor 黄耀泽黄碧英唐天文萨多威.R.唐纳德
Owner LONG POWER SYST NANTONG CO LTD
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