Electrochemical device and electronic device
An electrochemical and electrode technology, applied in the field of energy storage, can solve problems such as deformation, long charging time, and expansion of lithium-ion batteries
Active Publication Date: 2020-12-29
NINGDE AMPEREX TECH
View PDF5 Cites 4 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] Lithium-ion batteries generally have the following deficiencies or problems: the internal resistance of the battery is relatively large, and the current allowed for charging and discharging is small, resulting in too long charging time (for example, slow charging requires at least 3.5 hours, and fast charging requires at least 30 minutes)
Due to the lack of effective means to evenly dissipate heat from the lithium-ion battery, the interior of the lithium-ion battery will be locally overheated, which not only accelerates the aging of the lithium-ion battery, leading to a decline in battery capacity and power performance, but also causes expansion, deformation and even explosion of the lithium-ion battery other security risks
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0227] The performance evaluation of the examples and comparative examples of the lithium-ion battery according to the present application will be described below.
[0228] 1. Preparation of lithium ion battery
[0229] 1. Preparation of the middle layer
[0230] Mix the conductive material and styrene-butadiene rubber (SBR) with deionized water according to the mass ratio of 64.5%:35.5%, and stir evenly to obtain the middle layer slurry. The slurry is coated on the positive electrode or negative electrode current collector.
[0231] 2. Preparation of negative electrode
[0232] Mix artificial graphite, styrene-butadiene rubber and sodium carboxymethyl cellulose with deionized water in a mass ratio of 96%:2%:2%, and stir evenly to obtain negative electrode slurry. The negative electrode slurry was coated on a 12 μm current collector or on the intermediate layer. Drying, cold pressing, cutting into pieces and welding tabs to obtain the negative electrode.
[0233] 3. Prepa...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| The average particle size | aaaaa | aaaaa |
Login to View More
Abstract
The invention relates to an electrochemical device and an electronic device, and specifically provides an electrochemical device, which comprises an electrode and an electrolytic solution, wherein theelectrode comprises a current collector, an intermediate layer on the current collector, and an active material layer on the intermediate layer, the intermediate layer and the active material layer have a specific area ratio, and the electrolytic solution comprises a compound containing a sulfur-oxygen double bond. The electrochemical device of the invention has improved direct-current internal resistance and safety performance.
Description
technical field [0001] The present application relates to the field of energy storage, in particular to an electrochemical device and an electronic device, especially a lithium ion battery. Background technique [0002] With the development of technology and the increase in demand for mobile devices, various demands on electrochemical devices (eg, lithium-ion batteries) are also increasing. While pursuing high battery life, higher requirements are put forward for the performance of lithium-ion batteries, especially the safety performance of lithium-ion batteries. [0003] Lithium-ion batteries generally have the following deficiencies or problems: the internal resistance of the battery is relatively large, and the current allowed for charging and discharging is small, resulting in too long charging time (for example, it takes at least 3.5 hours for slow charging, and at least 30 minutes for fast charging). When a lithium-ion battery is charged and discharged at a high rate,...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): H01M10/0525H01M4/13H01M10/0567H01M10/42
CPCH01M10/0525H01M10/0567H01M10/4235H01M4/13H01M4/624Y02E60/10
Inventor 王可飞韩冬冬郭俊刘胜奇
Owner NINGDE AMPEREX TECH