Stepwise utilization method and system of decommissioned batteries
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A battery ladder and battery technology, applied in secondary batteries, battery recycling, secondary battery testing, etc., can solve the problems of battery attenuation, uneconomical, and short service life of battery packs, and achieve cost savings, low work efficiency, and process flow. Simplified effect
Inactive Publication Date: 2019-11-26
STATE GRID HEBEI ELECTRIC POWER CO LTD +1
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Therefore, this cascade utilization technology route is not economical; 2) directly using the entire battery pack for the microgrid energy storage system, this method has a lower secondary use cost, but some batteries will have serious attenuation, resulting in the entire battery pack The service life of the retired battery is very short; even, due to the voltage level, remaining capacity and material type of the retired battery, the retired battery cannot be directly used in the energy storage system like a new battery, and it cannot be used in large-scale series and parallel at all.
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Embodiment 1
[0053] Based on the above design concept, in one of the specific limited solutions of the present invention, the cascade utilization method of decommissioned batteries includes the following steps:
[0054] A method for cascade utilization of decommissioned batteries, comprising the following steps:
[0055] a. Sorting of decommissioned batteries: sort the decommissioned batteries according to the determined SOH standard of the battery state of health parameters, and judge whether the decommissioned batteries can be used in cascades; if yes, perform step b; if not, discard them. Preferably, the sorting step of the decommissioned batteries may include:
[0056] a1. Appearance sorting of decommissioned batteries: sort according to the determined appearance standards of decommissioned batteries, and judge whether they can enter the sorting of historical data of decommissioned batteries; more preferably, the appearance standards are: good appearance, clear and correct battery iden...
Embodiment 2
[0095] This embodiment relates to a cascade utilization of decommissioned batteries, which specifically includes the following steps:
[0096] Step 1: Appearance Sorting
[0097] First, sort the recycled lithium iron phosphate lithium-ion batteries by appearance. The specific inspection method is: under good light conditions, check whether there are any unqualified phenomena such as damage, deformation, stains, and leakage, and whether the battery identification is clear and correct. For retired batteries that fail the visual inspection, they will not be recycled; for retired batteries that pass the visual inspection, go to step 2 (such as figure 2 ).
[0098] Step 2: Sorting of historical operating data
[0099] Connect the BMS protection board of the decommissioned battery, read its historical operation data, and sort the historical operation data of the decommissioned battery; Batteries will not be recycled; for decommissioned batteries without the above conditions and ...
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Abstract
The invention provides a stepwise utilization method of decommissioned batteries. The stepwise utilization method comprises decommissioned battery sorting, decommissioned battery grouping and formingan energy storage system by the decommissioned batteries. The invention further provides a stepwise utilization system of decommissioned batteries, comprising an energy storage system and an energy management unit for controlling the energy storage system to perform charging and discharging, the energy storage system is composed of a plurality of battery clusters with a working voltage of 570 to 832.2V, and each battery cluster comprises a plurality of battery packs connected in parallel; and each battery pack comprises decommissioned batteries connected in series, a PCS and a monitoring unit.According to the stepwise utilization method and system provided by the invention, the consistency problem of the decommissioned batteries is solved through string distributed architecture, which greatly simplifies the process, can not only refine the management of energy storage batteries, but also can ensure the battery consistency to the greatest extent. In addition, the long-term stable operation of the entire system can be ensured, and the safety and the service life of the energy storage system are also objectively improved; and meanwhile, the stepwise utilization cost is reduced by thestepwise utilization method and system provided by the invention, so that the stepwise utilization method and system provided by the invention can be widely used, promoted and applied.
Description
technical field [0001] The invention relates to the technical field of cascade utilization of batteries, in particular to a method for cascade utilization of decommissioned batteries; meanwhile, the invention also relates to a system for cascade utilization of decommissioned batteries. Background technique [0002] With the vigorous development of the new energy vehicle industry, especially with the rapid growth of new energy vehicle production in recent years, the number of decommissioned power batteries is also increasing. Power batteries are currently dominated by lithium batteries, and the performance of the power battery will decline with the increase in the number of charge and discharge. When the battery capacity decays to less than 80% of the rated capacity, it will not only lead to poor user experience, but also in the complex process of power batteries. Under these conditions, it will also bring safety hazards. In order to ensure the power performance, mileage and...
Claims
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