Manufacturing method of high-energy-density soft package battery

A high-energy-density, soft-pack battery technology, applied in the field of high-energy-density soft-pack battery manufacturing, can solve the problems of low initial charge and discharge efficiency, affecting the capacity and energy density of lithium-ion batteries, to compensate for irreversible capacity loss, improve The effect of energy density

Active Publication Date: 2021-07-09
HUNAN GAOYUAN BATTERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a method for manufacturing a high-energy-density pouch battery. By presetting the auxiliary electrode of aluminum foil and using the auxiliary electrode of aluminum foil to pre-charge with a small current, the pre-embed

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  • Manufacturing method of high-energy-density soft package battery

Examples

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Example Embodiment

[0028] Example 1

[0029] Such as figure 1 As shown, a high-energy density soft bag battery is in situ pre-lithium-based structure, including a soft bag battery composed of an aluminum plastic film 4 and a lithium battery core 3, and the lithium battery core 3 is wrapped in an aluminum foil auxiliary electrode 9, lithium. The battery core 3 and the aluminum foil auxiliary electrode 9 are isolated with isolation membranes.

[0030] The lithium battery core 3 includes a positive electrode sheet, a negative electrode sheet, and a diaphragm (not shown), the positive electrode ear 1 and the negative electrode ears 2 of the negative electrode sheet of the negative electrode sheet are located at the top of the soft bag battery, and the aluminum foil auxiliary electrode 9 end welding has aluminum plastic Composite pole 8, aluminum-plastic composite pole 8 is taken out from the bottom corner of the air bag 7 of the soft bag battery.

[0031] Above the side of the air bag 7 is provided with...

Example Embodiment

[0032] Example 2

[0033] A method of manufacturing a high energy density soft bag battery, the process is as follows:

[0034] The positive electrode active substance is prepared according to the conventional process; the nano-silicon / carbon composite is prepared by the conventional process, and the negative electrode sheet is prepared according to the conventional process; the positive electrode sheet, the negative electrode, the diaphragm is wound by the winding core Where the positive electrode ear, the negative ear is located at the top of the core, and the aluminum foil is wrapped in a layer of aluminum foil as auxiliary electrode. The two surfaces of the aluminum foil auxiliary electrode are covered with the barrier core and the core and auxiliary electrode. In the aluminum film film, an aluminum-plastic composite ear is attached to the bottom corner of the air bag of the soft bag battery, in the aluminum film auxiliary electrode. figure 1 The seal position shown is press...

Example Embodiment

[0040] Example 3

[0041] A method of manufacturing a high energy density soft bag battery, the process is as follows:

[0042] The positive electrode active substance is prepared according to the conventional process; the silicon oxide / carbon composite material is a negative electrode active material, and the negative electrode sheet is prepared according to the conventional process; the positive electrode sheet, the negative electrode sheet, the diaphragm are wound into the core Where the positive electrode ear, the negative ear is located at the top of the core, and the aluminum foil is wrapped in a layer of aluminum foil as auxiliary electrode. The two surfaces of the aluminum foil auxiliary electrode are covered with the barrier core and the core and auxiliary electrode. In the aluminum film film, an aluminum-plastic composite ear is attached to the bottom corner of the air bag of the soft bag battery, in the aluminum film auxiliary electrode. figure 1 The seal position sho...

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Abstract

The invention provides a manufacturing method of a high-energy-density soft package battery. The manufacturing method comprises the following steps of: 1, wrapping the bottom of a lithium battery roll core with an aluminum foil auxiliary electrode, isolating and insulating the battery roll core and the aluminum foil auxiliary electrode by using an isolating membrane, and conducting assembling to obtain a soft package battery; 2, injecting an electrolyte 1 into the soft package battery obtained in the step 1, and conducting pre-charging by using the aluminum foil auxiliary electrode after sealing; and 3, taking out the aluminum foil auxiliary electrode after pre-charging is completed, removing the free electrolyte 1, injecting an electrolyte 2, and performing post-treatment to obtain the high-energy-density soft package battery. The aluminum foil auxiliary electrode is preset at the bottom of the roll core of the lithium ion battery; through the synergistic effect of the aluminum foil auxiliary electrode and the electrolyte 1 containing an additive, preintercalation of lithium is conducted on the negative electrode of the lithium ion battery in a small-current pre-charging process, so the problem that the first-time charging and discharging efficiency of the lithium ion battery is low is solved or improved; and thus, the capacity and energy density of the lithium ion battery are improved.

Description

technical field [0001] The invention relates to the technical field of high energy density pouch batteries, in particular to a manufacturing method of high energy density pouch batteries. Background technique [0002] As a green battery, lithium-ion battery has the advantages of high working voltage, high specific energy and long cycle life. It has been developed rapidly in recent years. The application in is more and more extensive. [0003] With the development of mobile devices towards miniaturization and multi-function, higher requirements are placed on the energy density and service life of lithium-ion batteries. Also due to the rapid development and wide application of various portable electronic devices and electric vehicles, there is an urgent need for lithium-ion batteries with high energy and long cycle life. [0004] At present, graphite, the main negative electrode material of commercial lithium-ion batteries, has limited the further improvement of lithium-ion ...

Claims

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Application Information

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IPC IPC(8): H01M10/058H01M10/0587H01M10/42H01M10/0525
CPCH01M10/058H01M10/0587H01M10/4235H01M10/0525Y02P70/50Y02E60/10
Inventor 唐杰雄李阳春李吉蓉郭正湘陈三朝雷文杰
Owner HUNAN GAOYUAN BATTERY
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