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Forming method of lithium titanate battery

A technology of lithium titanate battery and formation method, which is applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, climate sustainability, etc., can solve the problems of reduced energy density, uneven dispersion, unfavorable practical applications, etc., and achieve improved cycle performance , Guarantee the effect of battery capacity

Active Publication Date: 2015-03-11
HEBEI YINLONG NEW ENERGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most researchers add some additives or getter materials to the electrolyte solution to improve the flatulence problem of lithium titanate. Although it has a certain effect, it has high requirements on the purity of the additives, and it may bring Problems such as reduced energy density and uneven dispersion are not conducive to practical application in industrialization

Method used

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  • Forming method of lithium titanate battery
  • Forming method of lithium titanate battery
  • Forming method of lithium titanate battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Lithium nickel cobalt manganese oxide is used as the positive electrode material, and lithium titanate is used as the negative electrode material.

[0052] Place the battery in the formation cabinet for formation, adjust the temperature to 60°C, let it stand at a constant temperature for 5 minutes, then charge it with a constant current of 0.2C to 2.6V, then charge it with a constant voltage for 4 hours, let it stand for 10 minutes, and charge it with a constant current of 0.2C to 2.6V. Current discharge to 1.4V, then discharge at constant voltage for 4h, stand still for 10min, then age at high temperature 30℃ for 20h, decompress and exhaust, cycle 2 times; keep at constant temperature for 5min, then charge to 2.9V with a constant current of 1C, and then Charge at constant voltage for 2 hours, let it stand for 5 minutes, discharge at constant current of 1C to 1.7V, discharge at constant voltage for 2 hours, age at 30°C for 10 hours, depressurize and exhaust, cycle 3 time...

Embodiment 2

[0054] Lithium nickel cobalt manganese oxide is used as the positive electrode material, and lithium titanate is used as the negative electrode material.

[0055] Place the battery in the formation cabinet for formation, adjust the temperature to 80°C, let it stand at a constant temperature for 1 hour, then charge it with a constant current of 1C to 2.9V, then charge it with a constant voltage for 2 hours, let it stand for 10 minutes, and discharge it with a constant current of 1C To 1.7V, then constant voltage discharge for 2h, high temperature 40°C aging for 10h, decompression and exhaust, cycle 4 times, seal, activation is complete.

Embodiment 3

[0057] Lithium nickel cobalt manganese oxide is used as the positive electrode material, and lithium titanate is used as the negative electrode material.

[0058] Place the battery in the formation cabinet for formation, adjust the temperature to 120°C, keep it at a constant temperature for 2 hours, then charge it at a constant current of 1C to 2.9V, then charge it at a constant voltage for 2 hours, let it stand for 1 hour, and discharge it at a constant current of 2C To 1.7V, then constant voltage discharge for 4h, high temperature 60°C aging for 4h, decompression and exhaust, cycle 3 times, seal, activation is complete.

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Abstract

The invention discloses a forming method of a lithium titanate battery. The forming method comprises the following steps: S1, lying the battery for first preset time t1 at first preset temperature T1, charging the battery with first preset current I1 constantly until reaching first cut-off voltage, and charging the battery with U1 constantly for second preset time t2; S2, lying the battery for third preset time t3 at the first preset temperature T1, discharging the battery with second preset current I2 constantly until reaching second cut-off voltage, and discharging the battery with U2 for fourth preset time t4; S3, aging the battery for sixth preset time t6 at second preset temperature T2, reducing the pressure and exhausting air; S4, carrying out the step S1 to the step 3 repeatedly for preset frequency, and sealing a liquid filling opening of the battery. According to the forming method of the lithium titanate battery, water in the battery is consumed completely and is generated into gas to be discharged from the battery, so that the capacity of the battery can be ensured, and the cycle performance of the lithium titanate battery can be improved.

Description

technical field [0001] The invention relates to the field of manufacturing lithium ion batteries, in particular to a method for forming a lithium titanate battery. Background technique [0002] At present, the anode materials of lithium-ion batteries are mostly lithium-intercalated carbon materials, but the potential of the carbon electrode after lithium intercalation is close to that of metal lithium. When the battery is charged, the surface of the carbon electrode is easy to precipitate metal lithium, which reacts with the electrolyte to produce flammable gas. Therefore, the use of safe and reliable new negative electrode materials has become the key to the development of lithium-ion batteries. Lithium-ion batteries prepared with lithium titanate as the negative electrode material have attracted extensive attention from researchers due to their long cycle life, good rate performance, good fast charging performance and good safety, and have become a hot spot at present. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058
CPCH01M10/058Y02E60/10Y02P70/50
Inventor 刘金良高峰张汝彬石琳琳张要枫陈蓓
Owner HEBEI YINLONG NEW ENERGY
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