Screening method for cascade utilization of lithium titanate battery
A technology of lithium titanate battery and screening method, applied in battery recycling, recycling technology, recycling by waste collectors, etc. and the cycle life is not very different, so as to achieve the effect of high operability
Active Publication Date: 2018-08-28
SHANGHAI INST OF TECH
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[0004] Since no relevant patents have published technical information on the utilization of lithium titanate cascades, the Chinese literature "Feasibility Study on the Use of Decommissioned Lithium There is little difference between the DC internal resistance and the manufacturer's and cycle life, but it does not indicate what technical indicators are used to evaluate lithium titanate batteries can be used for cascade utilization
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[0019] A screening method for cascaded utilization of lithium titanate batteries, comprising the steps of appearance inspection, room temperature charging test, room temperature DC internal resistance test, high temperature discharge test, room temperature DC internal resistance test, low temperature discharge test, room temperature DC internal resistance test, and the like. in:
[0020] 1. Appearance inspection
[0021] Check the appearance of the waste lithium titanate battery system, and whether there is leakage of liquid and gas. The abnormal lithium titanate battery system will be recycled, and the intact lithium titanate battery system will enter the next step.
[0022] 2. Charging test at room temperature
[0023] Charge the waste lithium titanate battery system at room temperature at a current rate of 1C to the rated voltage, then switch to constant voltage charging until the charging current is less than 0.05C, and then let it stand for 1h;
[0024] Check the charg...
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The invention relates to a screening method for cascade utilization of a lithium titanate battery. The screening method comprises the following steps: performing the appearance detection, performing the charging test at a room temperature, performing the DC internal resistance test at the room temperature, performing the discharging test at a high temperature, performing the DC internal resistancetest at the room temperature, performing the discharging test at a low temperature, and performing the DC internal resistance test at the room temperature. Compared with the prior art, the differenceof the lithium titanate battery, a ferrous lithium battery and a ternary battery is sufficiently considered, the performance advantage of the lithium titanate battery is sufficiently utilized, the evaluation on the aspects such as capacity, service life, safety and the like is neglected, and on the basis of the three aspects of high magnification performance, poor low-temperature magnification performance and severe high-temperature inflation phenomenon of the lithium titanate battery as well as the consistence of PACK grade and a single body grade, the lithium titanate battery system can bescreened in a cascading manner. In addition, the screening method for the cascade utilization of the lithium titanate battery is simple, feasible, and high in operation, and capable of providing a feasible method for the cascade utilization of the lithium titanate battery.
Description
[technical field] [0001] The invention relates to the field of cascade utilization of lithium batteries, in particular to a screening method for cascade utilization of lithium titanate batteries. [Background technique] [0002] Lithium titanate batteries are characterized by low capacity, high rate, and long life. It is precisely because of these characteristics that lithium titanate batteries are very suitable for high-power applications, including road vehicles such as buses, as well as port cranes, mines, etc. Vehicles and off-highway vehicles such as excavators, power energy storage fields such as frequency modulation and peak regulation, peak shaving and valley filling. Lithium titanate batteries will be used more and more as the application area expands. This requires attention to the aftertreatment of lithium titanate after its performance decays, including cascade utilization and recycling. [0003] Lithium titanate battery uses zero-strain lithium titanate materia...
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IPC IPC(8): H01M10/54
CPCH01M10/54Y02W30/84
Inventor 张全生闵凡奇党国举张绍乙张绍凡周敦凡
Owner SHANGHAI INST OF TECH