Method for solving gas expansion failure of lithium titanate battery

A lithium titanate battery, flatulence technology, which is applied in the direction of electrical components, secondary batteries, secondary battery charging/discharging, etc., can solve the problems of flatulence failure of lithium titanate batteries, low probability of defective products, and high probability of defective products. , to achieve the effect of fast charging capability, low probability of defective products, and short processing cycle

Active Publication Date: 2016-03-30
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

Method used

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  • Method for solving gas expansion failure of lithium titanate battery
  • Method for solving gas expansion failure of lithium titanate battery
  • Method for solving gas expansion 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 formation process, an aging process and a vacuum packaging process, the formation process uses nickel-cobalt lithium manganese oxide / lithium manganate as the positive electrode material, and industrialized lithium titanate is the negative electrode The material, which is obtained through batching, coating, assembly, and electrolyte solution, is to be turned into a semi-finished battery cell, which includes the following steps in sequence:

[0052]Step 1: Charge with a constant current of 0.01C for 20h, 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 a constant current of 0.2C for 1 hour and then sleep for 5 minutes, 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, ...

Embodiment 2

[0065] Step is with embodiment 1, and difference is:

[0066] In the chemical formation process,

[0067] Step 1: Charge with a constant current of 0.05C for 4 hours;

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

[0069] Step 3: Charge with 0.3C constant current 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 cycle;

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

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

Embodiment 3

[0075] Step is with embodiment 1, and difference is:

[0076] In the chemical formation process,

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

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

[0079] Step 3: Charge with 0.5C constant current 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 cycle;

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

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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 in particular relates to a method for solving gas failure of a lithium titanate battery, which is suitable for preventing battery gas, improving battery discharge power, realizing fast charging capability 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 kinds of negative electrode materials for lithium-ion batteries. According to the functional requirements of batteries, the most commonly used negative electrode materials are natural graphite, ar...

Claims

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Application Information

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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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