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Flexible package lithium ion battery without electromagnetic interference and manufacturing method thereof

A lithium-ion battery, electromagnetic interference technology, applied in the direction of batteries, secondary batteries, circuits, etc., can solve the problems of forming noise or noise, affecting the playback quality of Bluetooth headsets, etc., and achieve the effect of improving energy density, structure and simple manufacturing method

Pending Publication Date: 2021-03-30
GUANG DONG VDL NEW ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] During the charging and discharging process of soft-packed lithium-ion battery, the lithium-ion battery itself will generate a weak electromagnetic field. In general, the interference to the equipment is not strong and can be ignored. In the device, such as: Bluetooth headset, the lithium-ion battery will have certain interference and influence on the speaker magnetic field in the Bluetooth headset during charging and discharging, thereby affecting the playback quality of the Bluetooth headset, forming noise or noise, so creating a A kind of flexible packaging lithium-ion battery without electromagnetic interference has positive significance

Method used

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  • Flexible package lithium ion battery without electromagnetic interference and manufacturing method thereof
  • Flexible package lithium ion battery without electromagnetic interference and manufacturing method thereof
  • Flexible package lithium ion battery without electromagnetic interference and manufacturing method thereof

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Embodiment 1

[0036] Please refer to Figure 1 to Figure 8 , Embodiment 1 of the present invention provides a soft-pack lithium-ion battery without electromagnetic interference, including a winding core body 4, such as figure 1 As shown, the core body 4 is formed by stacking and winding rectangular first separator 31, positive electrode sheet 1, second separator, negative electrode sheet 2 and third separator 33, and the winding core is made by stacking and winding. The body 4 has a simple structure and manufacturing method, and can effectively increase the energy density of the lithium battery, so that it is suitable for being assembled on more flexible wearable electronic products.

[0037] like image 3 and 4 As shown, the end of the winding core body 4 is reversely wound for at least 0.1 turns, so that the current direction of the lithium battery at the reverse turning point during charging or discharging is opposite to the previous current direction, so that the lithium battery is ch...

Embodiment 2

[0046] Embodiment 2 of the present invention provides a method for manufacturing a soft-pack lithium-ion battery without electromagnetic interference, comprising the following steps:

[0047] Step S1: making pole pieces and welding tabs, cutting out rectangular positive pole piece 1 and negative pole piece 2, vertically welding positive pole piece 5 on one end of positive pole piece 1, and vertically welding negative pole piece 6 on one end of negative pole piece 2;

[0048] Step S2: making the core body 4, the core body 4 is formed by stacking and winding the first rectangular diaphragm 31, the positive electrode sheet 1, the second diaphragm, the negative electrode sheet 2 and the third diaphragm 33, the core body 4 At least 0.1 turns of reverse winding at the end;

[0049] Step S3: the core body 4 is fixed, and the surface of the wound core body 4 is covered with a first aluminum-plastic film 81;

[0050] Step S4: Bending the tabs, bending the positive tab 5 and the negati...

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Abstract

The invention discloses an electromagnetic interference-free flexible package lithium ion battery which comprises a roll core body, the roll core body is formed by stacking and winding a rectangular first diaphragm, a positive plate, a second diaphragm, a negative plate and a third diaphragm, the tail end of the roll core body is reversely wound for at least more than 0.1 circle when being ended,one end of the positive plate is connected with a positive lug, the joint of the positive plate and the positive tab is coated with tab glue, the positive tab is vertically led out from the positive plate, one end of the negative plate is connected with the negative tab, the joint of the negative plate and the negative tab is coated with tab glue, and the negative tab is vertically led out from the negative plate. According to the flexible package lithium ion battery without electromagnetic interference and the manufacturing method of the flexible package lithium ion battery, the structure andthe manufacturing method are simple, an electromagnetic field generated in the charging and discharging processes can be reduced or counteracted, and normal work and precision of precision componentssensitive to the electromagnetic field are prevented from being affected.

Description

technical field [0001] The invention relates to the technical field of soft-packaged lithium-ion batteries, in particular to a soft-packaged lithium-ion battery without electromagnetic interference and a manufacturing method thereof. Background technique [0002] The outer packaging materials of lithium batteries are divided into two types: soft packs and hard packs. Compared with hard pack materials such as steel shells and aluminum shells, soft pack materials made of multilayer films are light in weight, large in capacity, high in safety, and can be Free choice of packaging shape and other advantages. [0003] Flexible packaging lithium-ion batteries are generally installed inside components with small size, high precision and strict space restrictions, such as mice, mobile phones and Bluetooth headsets. [0004] During the charging and discharging process of soft-packed lithium-ion battery, the lithium-ion battery itself will generate a weak electromagnetic field. In gen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0587H01M10/0525
CPCH01M10/0525H01M10/0587H01M2220/30Y02E60/10Y02P70/50
Inventor 吴方余
Owner GUANG DONG VDL NEW ENERGY CO LTD