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Waste battery pretreatment method

A waste battery, discharge reaction technology, used in secondary batteries, battery recycling, secondary battery charging/discharging, etc., can solve problems such as water pollution, and achieve the effects of enhancing electrical conductivity, enhancing flame retardant effect, and accelerating looseness.

Pending Publication Date: 2021-02-19
YINLONG ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to provide a method for the pretreatment of waste batteries to solve the technical problem of water pollution that cannot be avoided by the conventional salt water discharge method in the prior art

Method used

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  • Waste battery pretreatment method

Examples

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Embodiment 1

[0031]Place the decommissioned cylindrical lithium iron phosphate battery with a voltage of 3.255V and a rated capacity of 5Ah in a device with an exhaust gas collection cover, which is connected to the exhaust gas treatment device. Configure the discharge powder according to the following ratio: take 10kg each of graphite and activated carbon and mix them evenly, take 4000ml water and 600g sodium chloride solid to prepare a sodium chloride solution, and mix the prepared sodium chloride solution with the mixed graphite activated carbon , Stir evenly into a moist and loose powder. Spread a layer of 30cm discharge powder in the discharge device, place the battery to be discharged evenly on the discharge powder; after the battery is placed, spread a layer of 30cm thick discharge powder on the battery and press In practice, repeat this operation to stack three layers of batteries, spray the powder with oxalic acid solution, and adjust the pH value to 4. The discharge time is 2 ho...

Embodiment 2

[0033] The decommissioned ternary nickel-cobalt-manganese square battery with a voltage of 4.255V and a rated capacity of 60Ah was placed in a device with an exhaust gas collection cover, and the collection cover was connected to the exhaust gas treatment device. Configure the discharge powder according to the following ratio: take 20kg of graphite and 10kg of activated carbon and stir and mix, take 9000ml of water and 1800g of sodium chloride solid to form a sodium chloride solution with a solid-to-liquid ratio of 1:5, and mix the prepared sodium chloride solution with The mixed graphite activated carbon is mixed and stirred evenly to form a moist and loose powder. Spread a layer of 30cm-thick discharge powder in the discharge device, and place the battery to be discharged flat on the discharge powder; after the battery is placed, spread a layer of 30cm thick discharge powder on the battery and compact it , Repeat this operation to stack three layers of batteries, spray the p...

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Abstract

The invention discloses a waste battery pretreatment method. The method comprises the following steps: preparing discharge powder, preparing graphite and activated carbon into a graphite and activatedcarbon mixture, preparing a sodium chloride solution, and mixing and stirring the sodium chloride solution and the graphite and activated carbon mixture into wet and loose powder, namely the discharge powder; tiling and stacking the discharge powder and the waste batteries to be treated layer by layer, mechanically compacting the discharge powder and the waste batteries to be treated layer by layer, and carrying out discharge reaction and activated carbon regeneration in a discharge device; crushing the discharged waste battery and the discharge powder together, mixing and placing to fully adsorb the electrolyte of the waste battery by the activated carbon, then screening, and recycling the recovered discharge powder. According to the waste battery pretreatment method, production equipment is simplified, a set of green circulation system is formed, and the method is suitable for large-scale use.

Description

technical field [0001] The invention relates to the technical field of recycling waste batteries, in particular to a method for pretreatment of waste batteries. Background technique [0002] As my country's large-scale decommissioning of power batteries is approaching, if the decommissioned power batteries are not properly disposed of, the threat to the environment will be huge. Power battery recycling has always been an important task related to the green development of the industry, and is of great significance to resource recycling, green environmental protection, safety management, and industrial development. [0003] It is generally believed in the industry that battery recycling can be divided into two major directions: cascade utilization and resource recovery. Resource recovery includes discharge treatment, dismantling and crushing, electrolyte recovery, component screening and separation, and wet / pyrometallurgy. The technical level at the present stage has relative...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54H01M10/44H01M10/42
CPCH01M10/448H01M10/44H01M10/54H01M10/4242Y02W30/84Y02E60/10
Inventor 张日阳叶树宝卢卿高宁泽蔡惠群
Owner YINLONG ENERGY CO LTD
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