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A kind of sealing formation method of lithium ion battery

A technology of lithium-ion batteries and formation methods, which is applied in the manufacture of battery pack parts, non-aqueous electrolyte batteries, electrolyte batteries, etc. It can solve the problems of exhaust gas cannot be discharged, long process time, battery moisture absorption, etc., and achieve cycle performance improvement and process Shorter time, more consistent results

Active Publication Date: 2017-03-15
SUZHOU PHYLION BATTERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a sealing formation method for lithium-ion batteries, which solves the problems of battery moisture absorption, exhaust gas cannot be discharged, long process time and high cost in the formation process of existing lithium-ion batteries

Method used

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  • A kind of sealing formation method of lithium ion battery
  • A kind of sealing formation method of lithium ion battery
  • A kind of sealing formation method of lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment one: a kind of sealing formation method of lithium ion battery, it comprises the following steps:

[0028] (a) First reserve the vent hole 4 and the liquid injection port 3 on the battery case, then fill the battery with electrolyte according to the designed amount, and complete the weighing;

[0029] (b) sealing the battery liquid injection port 3 by laser welding;

[0030] (c) Clean the upper cover plate 1 of the battery, and let it stand at room temperature for 2.0 hours to 24.0 hours;

[0031] (d) After standing still, the battery is precharged;

[0032] (e) After the pre-charging is completed, let it stand at room temperature for 0.5 hours to 20.0 hours, open the vent hole on the battery case, and perform vacuum exhaust;

[0033] (f) After exhausting the exhaust gas inside the battery, seal the vent hole on the battery case with steel balls and reinforce it with glue;

[0034] (g) Leave the battery at room temperature and recharge the battery.

[003...

Embodiment 2

[0038] Embodiment two: a kind of sealing formation method of lithium ion battery, it comprises the following steps:

[0039] (a) First, install the upper cover plate 1 of the battery case (refer to the attached image 3 As shown), the vent hole 4 and the liquid injection port 3 are reserved, and then the battery is filled with electrolyte according to the designed amount, and the weighing is completed;

[0040] (b) Seal the battery liquid injection port 3 by welding a safety valve at the liquid injection port 3;

[0041] (c) if image 3 As shown, clean the battery pole 2 and the safety valve, put it in a vacuum box with a vacuum degree of -50 to 65KPa for 2-6 hours, and check the sealing of all welding positions;

[0042] (d) Stand for about 9.0-15.0 hours at a temperature of 30-50°C;

[0043] (e) After standing still, the battery is precharged;

[0044] (f) After the pre-charging is completed, let it stand at room temperature for 0.5-20.0 hours, open the vent hole on the ...

Embodiment 3

[0049] Embodiment three: a kind of sealing formation method of lithium ion battery, it comprises the following steps:

[0050] (a) First reserve the vent hole 4 and the liquid injection port 3 on the battery case, then fill the battery with electrolyte according to the designed amount, and complete the weighing;

[0051] (b) sealing the battery liquid injection port 3 by laser welding;

[0052] (c) Clean the upper cover plate 1 of the battery, and let it stand at room temperature for 2.0 hours to 24.0 hours;

[0053] (d) After standing still, the battery is precharged;

[0054] (e) After the pre-charging is completed, let it stand at room temperature for 8.0 hours to 36.0 hours;

[0055] (f) Leave the battery at room temperature and recharge the battery;

[0056] (g) After completing the recharging, open the exhaust hole on the battery case to vacuumize and exhaust;

[0057] (h) After exhausting the exhaust gas inside the battery, seal the vent hole on the battery case wit...

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Abstract

The invention discloses a sealing formation method of a lithium ion battery, which comprises the following steps: (a) reserving a vent hole position and a liquid injection port on the battery case, filling the battery with electrolyte, and weighing it; (b) sealing Battery liquid inlet; (c) Stand still at room temperature for 2.0 hours to 24.0 hours; (d) After standing still, pre-charge the battery; (e) After pre-charging, stand still for 0.5 hours to 20.0 hours , open the exhaust hole, and carry out vacuum exhaust; (f) after exhausting the exhaust gas inside the battery, seal the exhaust hole with steel balls, and reinforce it with glue; Recharge. In the prior art, the liquid injection port is not sealed after liquid injection, so that the inside of the battery is in contact with the outside world for a long time, and the possibility of battery moisture absorption increases, while the present invention directly seals the liquid injection port after liquid injection, so that the inside of the battery is in contact with the external environment The very short time reduces the possibility of the battery absorbing moisture.

Description

technical field [0001] The invention relates to a formation method of a lithium ion battery, in particular to a sealing formation method of a lithium ion battery. Background technique [0002] Lithium-ion batteries are a class of Li- + The secondary battery with embedded compound as the positive and negative electrodes, the battery using non-aqueous electrolyte solution, has the advantages of high energy density, environmental friendliness, long cycle life, good safety performance, fast charging, etc. It is an ideal power supply for digital products and an electric vehicle. , The power source of the electric bicycle. [0003] The formation of lithium-ion batteries has two main functions: one is to convert the active material in the battery into a substance with normal electrochemical action by means of the first charge; the other is to form an effective passivation film on the surface of the electrode, mainly the negative electrode. (SEI film) to prevent the negative elect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/058H01M10/44H01M2/12
CPCH01M10/058H01M50/636Y02E60/10Y02P70/50
Inventor 王正伟刘付召程凯
Owner SUZHOU PHYLION BATTERY
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