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Method for producing a lithium ion battery and lithium ion battery

A lithium-ion battery pack and battery pack technology, applied in battery electrodes, lithium storage batteries, secondary battery charging/discharging, etc., can solve the problems of electrode local short circuit, explosion, battery heating, etc., and achieve enhanced voltage reduction and improvement. The effect of diffusion resistance and safety improvement

Inactive Publication Date: 2017-06-13
LITHIUM ENERGY & POWER GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, damage can also occur in Li-ion batteries due to mechanical stress, resulting in localized short circuits between the electrodes
This results in intense localized heating of the battery, which can lead to combustion and explosion

Method used

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  • Method for producing a lithium ion battery and lithium ion battery
  • Method for producing a lithium ion battery and lithium ion battery
  • Method for producing a lithium ion battery and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0156] Make two Li-ion battery packs with the following characteristic values:

[0157] Positive electrode:

[0158] Active material: LiNi 0.8 co 0.15 al 0.05 o 2 (NCA)

[0159] Binder: about 3% by weight, based on the total amount of active material

[0160] Conductive material: carbon black, about 3%, based on the total amount of active material

[0161] Surface coverage: about 20 mg / cm 2

[0162] Negative electrode:

[0163] Active Material: Graphite

[0164] Binder: about 3% by weight, based on the total amount of active material

[0165] Surface coverage: about 15 mg / cm 2

[0166] Diaphragm:

[0167] Thickness: approx. 20 μm with ceramic coating

[0168] Pretreatment and Formation:

[0169] Precharged to approximately 10% state of charge (SOC)

[0170] into:

[0171] 2 cycles (charge and discharge) at 0.2 C, voltage limit 2.5 to 4.35 V

[0172] 1 cycle, at 1 C, voltage limit 2.5 to 4.35 V.

[0173] One of these cells was used as a control cell. Among t...

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Abstract

A lithium-ion battery comprising at least one battery cell (2), the battery cell (2) in each case comprising a negative electrode (21), a positive electrode (22), an electrolyte composition (15), and a separator (18), characterized in that the lithium-ion battery further comprises at least one fast discharge device (61) and the surface of the negative and / or of the positive electrode (21, 22) is coated with a material which has an electrical resistance of more than 0 [omega]cm2 and a lithium-ion conductivity of more than 0 S / cm and which has a solubility of less than 1 g / L in the electrolyte composition (15) under the operating conditions of the lithium-ion battery.

Description

technical field [0001] Mobility is becoming more and more important for modern electrical equipment. Mobile and powerful energy supplies are not only desired for small electronic devices such as mobile phones, navigation systems and the like. Motor vehicles are also increasingly expected to be independent of fossil fuel supplies. Due to the large weight of these devices, there is a need to provide a battery pack that is powerful for these applications and also to reduce its weight. Background technique [0002] In recent years, lithium-ion batteries have proven to be particularly promising in this field, since they are distinguished by a particularly high energy density. In addition, lithium-ion batteries are advantageous because they have little memory effect and the self-discharge of the cells is relatively low. However, the application of these battery packs is always contrary to expectations, because in the case of wrong application, such as excessive charging or disc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M10/0525H01M10/058H01M10/44
CPCH01M4/04H01M10/0525H01M10/058H01M10/44H01M4/13H01M10/052H01M10/0567H01M10/4235H01M10/425H01M2200/00Y02E60/10Y02P70/50H01M10/446H01M4/131C08L65/00C08L69/00C08L79/08C08L81/04C08L81/08C01G53/42C01P2006/40C08K3/04C08K2201/001H01M4/0404H01M4/139H01M4/62H01M10/0565H01M10/0587H01M2004/028
Inventor 增田英树川副雄大腾又勇太郎M.维尔卡
Owner LITHIUM ENERGY & POWER GMBH & CO KG
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