Manufacturing method of lithium ion battery capable of resisting storage discharge to zero volt

A technology of lithium-ion battery and manufacturing method, which is applied to secondary batteries, battery electrodes, electrode carriers/collectors, etc., and can solve problems such as consumption, low battery voltage, and short circuit between positive and negative electrodes of the battery

Pending Publication Date: 2020-10-30
苏州合睿新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] During long-term storage, lithium-ion batteries will face the danger of excessive self-discharge, especially at low open circuit voltage; excessive self-discharge will lead to low battery voltage, causing the copper foil of the negative electrode collector to dissolve, etc. risk; copper metal dissolves into copper ions, and Li + At the same time, the intercalation reaction of the positive electrode occurs on the surface of the positive electrode; and as the discharge state of the battery changes to the charged state, the copper on the surface of the pos

Method used

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  • Manufacturing method of lithium ion battery capable of resisting storage discharge to zero volt
  • Manufacturing method of lithium ion battery capable of resisting storage discharge to zero volt
  • Manufacturing method of lithium ion battery capable of resisting storage discharge to zero volt

Examples

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Embodiment 1

[0033] In this embodiment, a manufacturing method of a lithium-ion battery resistant to storage and discharge to zero volts:

[0034] (1). Aluminum foil is used as the current collector for the positive electrode, and aluminum tabs are welded on the aluminum foil with an ultrasonic spot welder, and high-temperature insulating tape is pasted on both sides of the tabs; copper foil current collectors are used for the negative electrode, and copper foil current collectors are used as a control Group;

[0035] (2). On the negative current collector, also use an ultrasonic spot welding machine to weld nickel tabs, and paste high-temperature insulating tape on both sides of the tabs to avoid battery short circuit;

[0036] (3) According to the battery capacity and the balance value of the positive and negative electrode capacity, design the battery size, the thickness of the positive and negative electrodes, the amount of electrolytic addition and many other parameters;

[0037] (4)...

Embodiment 2

[0045] In this embodiment, a manufacturing method of a lithium-ion battery resistant to storage and discharge to zero volts:

[0046] (1). The positive electrode uses aluminum foil as the current collector, and the aluminum tab is welded on the aluminum foil with an ultrasonic spot welder, and the two sides of the tab are glued with high-temperature insulating tape; the negative electrode uses a titanium foil current collector, and at the same time, uses a copper foil current collector as a control Group;

[0047] (2). On the negative current collector, also use an ultrasonic spot welding machine to weld nickel tabs, and paste high-temperature insulating tape on both sides of the tabs to avoid battery short circuit;

[0048] (3) According to the battery capacity and the balance value of the positive and negative electrode capacity, design the battery size, the thickness of the positive and negative electrodes, the amount of electrolytic addition and many other parameters;

[00...

Embodiment 3

[0057] In this embodiment, a manufacturing method of a lithium-ion battery resistant to storage and discharge to zero volts:

[0058] (1). The positive electrode uses aluminum foil as the current collector, and the aluminum tab is welded on the aluminum foil with an ultrasonic spot welder, and the two sides of the tab are glued with high-temperature insulating tape; the negative electrode uses a titanium foil current collector, and at the same time, uses a copper foil current collector as a control Group;

[0059] (2). On the negative current collector, also use an ultrasonic spot welding machine to weld nickel tabs, and paste high-temperature insulating tape on both sides of the tabs to avoid battery short circuit;

[0060] (3) According to the battery capacity and the balance value of the positive and negative electrode capacity, design the battery size, the thickness of the positive and negative electrodes, the amount of electrolytic addition and many other parameters;

[...

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Abstract

The invention belongs to the technical field of chemical engineering. The invention especially relates to a lithium ion battery resistant to storage discharge to zero volt and a battery discharge process test. The invention discloses a reversible lithium ion battery. Discharging can be performed until the voltage between a cathode and an anode is zero volt, and the battery cannot be damaged perpetually; the novel anode current collector is provided, a titanium foil is selected as the anode current collector, and the dissolving potential of the titanium foil is higher than the zero-point crosspotential of the cathode and the anode of the battery, so that the permanent damage to the battery due to dissolution and precipitation of the copper foil in the process of discharging the lithium ionbattery to 0V is avoided.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a lithium-ion battery capable of storing and discharging to zero volts. Background technique [0002] Lithium-ion batteries, as electrochemical energy storage devices, are widely used in many energy storage fields such as consumer electronics, transportation power tools, and military and civilian electronic equipment because of their advantages such as high energy density, good cycle life, no memory effect, and fast charging. Lithium-ion batteries are mainly composed of positive electrodes, negative electrodes, electrolytes, separators, external connections, and packaging components. Among them, the positive electrode and the negative electrode contain active electrode materials, conductive agents, binders, etc., and are evenly coated on the aluminum foil and copper foil current collectors after stirring. [0003] According to its appearance, lithium-ion ba...

Claims

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Application Information

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IPC IPC(8): H01M10/0587H01M4/66H01M10/0525
CPCH01M10/0587H01M4/661H01M4/662H01M10/0525H01M2004/021H01M2004/027Y02E60/10Y02P70/50
Inventor 赵新生王行龙孙海燕
Owner 苏州合睿新能源科技有限公司
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