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A method for solving the gas failure of lithium titanate battery

A lithium titanate battery, flatulence technology, applied in electrical components, secondary batteries, secondary battery repair/maintenance, etc. problem, to achieve the effect of fast charging capability, low probability of defective products, and improved battery discharge power

Active Publication Date: 2018-10-16
DONGFENG COMML VEHICLE CO LTD
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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 overcome the problems of long processing cycle and high probability of defective products in the prior art, and provide a method for solving the flatulence failure of lithium titanate batteries with short processing cycle and low probability of defective products

Method used

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  • A method for solving the gas failure of lithium titanate battery
  • A method for solving the gas failure of lithium titanate battery
  • A method for solving the gas failure of lithium titanate battery

Examples

Experimental program
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Effect test

Embodiment 1

[0051] A method for solving the flatulence failure of a lithium titanate battery, which sequentially includes a chemical conversion process, an aging process, and a vacuum packaging process. The chemical conversion process uses lithium nickel cobalt manganate / lithium manganate as the positive electrode material, and industrial lithium titanate as the negative electrode Material, the semi-finished battery cell to be formed into the object obtained by compounding, coating, assembling, and adding electrolyte includes the following steps in sequence:

[0052] Step 1: Charge with a constant current of 0.01C for 20 hours, where the cut-off voltage is 1.8V;

[0053] Step 2: Charge with a constant current of 0.1C for 7 hours, where the cut-off voltage is 2.8V;

[0054] Step 3: Charge with 0.2C current constant current for 1h and then sleep for 5min, where the cut-off voltage is 2.8V;

[0055] Step 4: Discharge at a constant current of 0.5C for 3 hours and then sleep for 5 minutes, where the c...

Embodiment 2

[0065] The steps are the same as in Example 1, the difference is:

[0066] In the formation process,

[0067] Step 1: Charge with 0.05C constant current for 4h;

[0068] Step 2: Charge with a constant current of 0.1C for 2h;

[0069] Step 3: Charge at a constant current of 0.3C for 1 hour and then sleep for 5 minutes;

[0070] Step 7: Repeat steps 5 to 6 4 times and then sleep for 5 minutes;

[0071] Step 10: Repeat steps 8 to 9 4 times in a loop;

[0072] In the aging process, the aging temperature is 60°C, and the aging time is 50h.

[0073] In the vacuum packaging process, the vacuum degree inside the battery is -0.09MPa.

Embodiment 3

[0075] The steps are the same as in Example 1, the difference is:

[0076] In the formation process,

[0077] Step 1: Charge with a constant current of 0.1C for 2h;

[0078] Step 2: Charge with 0.2C constant current for 1h;

[0079] Step 3: Charge at a constant current of 0.5C for 1 hour and then sleep for 5 minutes;

[0080] Step 7: Repeat steps 5 to 6 5 times and then sleep for 5 minutes;

[0081] Step 10: Repeat steps 8 to 9 5 times in a loop;

[0082] In the aging process, the aging temperature is 65°C, and the aging time is 24h.

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PUM

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Abstract

The invention provides a method for solving gas expansion failure of a lithium titanate battery. The method comprises a formation process and an aging process; the formation process comprises the following steps: firstly, charging for 2 to 20 hours in a constant-current mode by current of 0.01C to 0.1C, charging for 1 to 7 hours in a constant-current mode by current of 0.1C to 0.2C and charging for 0.5 to 1 hour in a constant-current mode by current of 0.2C to 0.5C; secondly, discharging for 3 hours in a constant-current mode by current of 0.5C to 1C, then charging for 3 hours and discharging for 3 hours in a constant-current and constant-voltage mode by current of 0.5C, and repeating the steps of charging for 3 hours and discharging for 3 hours in a constant-current and constant-voltage mode by current of 0.5Cfor 3 to 6 times; and finally, charging for 2 hours and discharging for 2 hours in a constant-current and constant-voltage mode by current of 1C, and repeating final two steps for 3 to 6 times. With such a design, batteries are prevented from expanding, the discharge power of the batteries is increased and a quick charge capacity and good service are realized. The production probability of defective products is low and the process cycle is short.

Description

Technical field [0001] The invention belongs to the field of battery manufacturing, and specifically relates to a method for solving the flatulence failure of a lithium titanate battery, which is suitable for preventing battery flatulence, improving battery discharge power, realizing fast charging ability and good service life. Background technique [0002] Lithium-ion batteries have the advantages of light weight, high specific energy, high working voltage, long life, and relatively low self-discharge. At the same time, due to the relatively small working current of mobile electronic products, general lithium-ion batteries can meet the requirements, so since commercialization Lithium-ion batteries have been rapidly promoted in the field of mobile electronics. [0003] At present, there are many types of anode materials for lithium-ion batteries. The most commonly used anode materials according to battery functional requirements are natural graphite, artificial graphite, mesophase ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/44
CPCH01M10/446Y02E60/10
Inventor 孟仙雅刘立炳惠怀兵冯修成陈果赵佳奇孙晓芬
Owner DONGFENG COMML VEHICLE CO LTD
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