Battery and electronic device using same

An electronic device and battery technology, which is applied to large-size batteries/battery packs, small-size batteries/battery packs, battery pack components, etc., can solve problems such as increasing battery thickness and reducing battery volumetric energy density, and achieves improved Energy density, improved drop resistance and safety, effects of reduced battery thickness

Pending Publication Date: 2021-12-31
NINGDE AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, winding the glue will increase the thickness of the battery, resulting in a decrease in the volumetric energy density of the battery

Method used

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  • Battery and electronic device using same
  • Battery and electronic device using same
  • Battery and electronic device using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Preparation of the cathode pole piece: the difference from Comparative Example 1 is that polyolefin hot-melt adhesive is coated on the blank area at the end of the pole piece prepared in Comparative Example 1 and dried to form an adhesive layer, wherein the adhesive The thickness of the layer is 1 μm.

[0061] Preparation of the anode sheet: same as that of Comparative Example 1.

[0062] Preparation of the diaphragm: select PE with a thickness of 5 μm as the diaphragm substrate, and coat a ceramic coating with a thickness of 2 μm on one side of the diaphragm substrate. The ceramic coating includes boehmite with a particle size D50 of 0.8 μm to 1 μm; Add 91wt% of the binder into the stirrer, the polymerized monomers of the binder include 0.8 part of styrene, 0.1 part of isobutyl acrylate and 0.1 part of acrylonitrile, then add 0.5wt% of the thickener carboxymethyl cellulose Sodium (CMC), then continue to add 8.5wt% wetting agent dimethylsiloxane, and finally add deioni...

Embodiment 2

[0066] Preparation of the cathode sheet: the difference from Example 1 is that the thickness of the adhesive layer is 6 μm.

[0067] Preparation of the anode sheet: the same as in Example 1.

[0068] Preparation of the separator: the difference from Example 1 is that the polymerized monomers of the binder include 0.7 part of styrene, 0.2 part of isobutyl acrylate and 0.1 part of acrylonitrile.

[0069] Preparation of the electrode assembly: the difference from Example 1 is that the area of ​​the surface of the electrode assembly bonded to the adhesive layer accounts for 20% of the total area of ​​the surface of the electrode assembly. The bonding force between the separator and the cathode electrode sheet is 9.1 N / m, and the bonding force between the separator and the anode electrode sheet is 10.2 N / m.

[0070] Preparation of battery: the same as in Example 1.

Embodiment 3

[0072] Preparation of the cathode sheet: the difference from Example 1 is that the thickness of the adhesive layer is 8 μm.

[0073] Preparation of the anode sheet: the same as in Example 1.

[0074] Preparation of the separator: the difference from Example 1 is that the polymerized monomers of the binder include 0.6 part of styrene, 0.3 part of isobutyl acrylate and 0.1 part of acrylonitrile.

[0075] Preparation of the electrode assembly: the difference from Example 1 is that the area of ​​the surface of the electrode assembly bonded to the adhesive layer accounts for 40% of the total area of ​​the surface of the electrode assembly. The bonding force between the separator and the cathode electrode sheet is 9.8 N / m, and the bonding force between the separator and the anode electrode sheet is 10.6 N / m.

[0076] Preparation of battery: the same as in Example 1.

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Abstract

A battery comprises an electrode assembly and a packaging film for packaging the electrode assembly. The electrode assembly comprises a first pole piece, a second pole piece and a diaphragm, the diaphragm is arranged between the first pole piece and the second pole piece, the binding power between the diaphragm and the first pole piece or the second pole piece is larger than or equal to 3 N / m, the battery further comprises an adhesive layer, and the adhesive layer is arranged between the surface of the electrode assembly and the packaging film and bonds the electrode assembly and the packaging film together. According to the invention, the safety and the battery energy density are improved. The invention also provides an electronic device using the battery.

Description

technical field [0001] The present application relates to the battery field, in particular to a battery and an electronic device using the battery. Background technique [0002] With the mature application of consumer electronics products, customers are paying more and more attention to the risks of whole machine applications. For example, the requirements for the anti-drop performance of electronic products are getting higher and higher. As an important part of electronic products, batteries also have requirements for anti-drop performance. [0003] When the battery is dropped along with the electronic product, the electrode assembly contained in the battery packaging film is easy to move in the packaging film. When the electrode assembly moves in the packaging film, the diaphragm located at the head of the electrode assembly with tabs and the tail opposite to the head is prone to pleating or shrinking, so that the cathode electrode sheet and the anode electrode sheet are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/46H01M50/10H01M50/474H01M50/486
CPCH01M50/461H01M50/10H01M50/474H01M50/486Y02P70/50
Inventor 陈晓张远兵胡克文石长川
Owner NINGDE AMPEREX TECH
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