217results about "Electrolyte/reactants regeneration" patented technology

The invention belongs to the technical field of batteries, and discloses a composite lithium supplement agent, a positive pole piece, a battery and electric equipment. The composite lithium supplement agent comprises an inner core and a shell covering the inner core, wherein the shell comprises a carbon coating layer; the carbon coating layer comprises a cage-shaped ball structure, and the carbon coating layer has elasticity; the inner core comprises a lithium supplementing material. The composite lithium supplement agent can adapt to the volume change of the lithium supplement material during the first lithium removal, and the contact between the electrolyte and the interior of the composite lithium supplement agent or a decomposition product is avoided, so that the side reaction of an interface is reduced, the gas production is reduced, the battery capacity is improved, and the stability and safety of the battery are favorably improved.

The invention discloses a sodium ion positive electrode material and a failure re-repairing method thereof.The failure re-repairing method of the sodium ion positive electrode material is used for re-repairing the sodium ion positive electrode material which fails due to exposure to a wet environment and comprises the following steps that S1, the failed sodium ion positive electrode material is washed with absolute ethyl alcohol and then subjected to vacuum drying, and the sodium ion positive electrode material is obtained; the pretreated layered oxygen positive electrode material is obtained; s2, preparing a repairing solvent, wherein the repairing solvent is prepared by dissolving hydrochloric acid modified polyaniline and multi-walled carbon nanotubes in N-methyl pyrrolidone; s3, dissolving the layered oxygen positive electrode material in a repairing solvent, and stirring to obtain a sodium ion positive electrode material to be dried; and S4, carrying out vacuum drying on the sodium ion positive electrode material to be dried, and cooling to obtain the repaired layered oxide positive electrode material. The method can effectively remove moisture and impurities on the surface of the failed material, recover the basic performance, and improve the stability of the repaired material structure, the specific capacity of current discharge and the cycle performance of the material.

Embodiments of the present disclosure generally relate to battery management systems, and more particularly relate to a battery regeneration system for optimizing de-sulfation of a lead- acid type storage battery and method thereof The battery regeneration system (100) includes sensors (102), a processor (108), and a memory unit (110). The sensors determine battery parameters during charging and discharging cycles. The processor analyzes the parameters to assess sulphation severity and conductive medium levels in lead-acid battery (104). Using AI- based techniques, processor selects very high-frequency cross-pulsing technique for de- sulfation. The system generates pulse sequence data with adjustable frequency and amplitude, transmitting it to control unit (114) for de-sulfation. Periodically, pulse frequency and amplitude are adjusted within predefined ranges. The control unit receives and applies modified data to lead-acid battery, charging battery to its original condition after de-sulfation. The system also communicates conductive medium level to Battery Monitoring System (BMS) (118).

The invention provides a method for repairing an electric return lead-acid storage battery by using a zwitter-ion additive, which comprises the following steps of: preparing the zwitter-ion additive with sulfonic acid group and amino group, and compounding the zwitter-ion additive with conductive carbon with acidified surface to prepare repairing liquid; opening an upper cover plate and a safety valve of the battery, adding a certain amount of deionized water, standing, and extracting redundant flowing liquid; after a certain amount of repairing liquid is added, low-current charging is adopted, and electrified pumping is in a barren solution state; the steps are repeated, overcharging is carried out with smaller current, and stopping is carried out; and then the battery air hole cover is reset and fixed again. And finally, testing the repaired battery, and checking the repairing effect. The method can solve the problems that the residual capacity of the returned lead-acid storage battery for electric power is high, and resources are wasted when the lead-acid storage battery is directly subjected to hazardous waste treatment; and meanwhile, the updating frequency of the lead-acid storage battery for power is reduced, and the power operation cost is reduced.

The invention discloses a preparation method of an anti-aging lead-acid battery electrolyte, and relates to the technical field of electrolytes. According to the electrolyte, dilute sulphuric acid is adopted as a basic system, and a biological small molecule synergistic inhibitor (sodium glutamate and taurine), organic weak acid salt (triammonium citrate), water-soluble polymer (hydroxypropyl methyl cellulose), a conductive nano material (graphene oxide) and a green deep eutectic solvent (choline chloride-ethylene glycol) are compositely introduced; and a trace amount of aluminum salt and a metal organic catalyst are supplemented. By inhibiting sulfation, relieving grid corrosion, inhibiting gassing and balancing acid concentration, systematic improvement of the cycle life, the charge acceptance and the repair capacity of the lead-acid battery is realized.

[Problem] An object is to provide a lead sulfate coating removal device that has low power consumption and does not damage an electrode of a lead-acid battery.[Solution]A lead sulfate coating removal device implemented by an application specific integrated circuit (ASIC) that removes a lead sulfate coating generated on an electrode of a lead-acid battery includes: a generation unit that generates, on the basis of a signal extracted from the lead-acid battery, a removal signal of the lead sulfate coating having a peak value of 550 mA to 1000 mA, a pulse width of 5 nsec to 100 nsec, and a frequency of 5 kHz to 50 kHz; and a supply unit that supplies the removal signal generated by the generation unit to the electrode of the lead-acid battery.

The invention discloses a method for separating a positive electrode active material and a current collector of a waste lithium ion battery, and belongs to the technical field of recycling of the waste lithium ion battery. The method comprises the following steps: discharging and disassembling the waste lithium ion battery pack, and mechanically crushing to obtain a positive electrode current collector loaded with an active material; and activating the positive current collector loaded with the active material by adopting an aqueous solution containing an activating agent, adjusting the pH value of the system to be acidic, adding a positive separating agent to form an interface layer with the positive current collector, stripping, filtering, sorting and drying to obtain the positive current collector and the positive active material. The wettability of the positive electrode active material is improved by adopting the activating agent, so that hydrogen ions and the positive electrode separating agent can enter the aluminum foil layer to form a new interface layer, and the positive electrode active material is stripped. The method is high in separation efficiency, simple and convenient to operate and free of damage to the positive electrode active material.

The invention provides a lithium-rich lithium supplement agent with high air stability and a preparation method thereof, and relates to the field of lithium ion battery lithium supplement agents. The preparation method of the lithium-rich lithium supplement agent with high air stability comprises the following steps: low-temperature carbonization coating and polymerization coating. According to the lithium-rich lithium supplement agent with high air stability and the preparation method, the air stability, the isolation performance and the water absorption of the lithium-rich lithium supplement agent are improved, the dynamic performance of the lithium-rich lithium supplement agent is improved, and the matching performance of the lithium-rich lithium supplement agent and a positive electrode material is improved; and the electrical performance is further improved.

A recycling method for a lithium ion secondary battery that can improve the implementation efficiency is provided. The recycling method for a lithium ion secondary battery disclosed herein includes a Li precipitating step of performing pulse charging and discharging on a lithium ion secondary battery in a low temperature environment so that Li is precipitated on a negative electrode, and an active material breaking step of repeatedly charging and discharging the lithium ion secondary battery in a range where a positive electrode is in a low potential region so that a positive electrode active material is broken.

To provide a nonaqueous electrolytic solution, which provides improved properties over nonaqueous electrolytic solutions of the prior art.SOLUTION: The invention relates to the use of a compound of Formula I in a nonaqueous battery electrolyte formulation, where W is independently selected from the group consisting of H, F, Cl, Br and I; Z is independently selected from the group consisting of H, O(CW2)pCW3, (CW2)pCW3, OCY3, OCW3, polyalkylene glycol and polyolester; n is an integer from 1 to 1000; one of T1 and T2 is W, and the other is (CY2)mCY3; Y is independently selected from the group consisting of F, Cl, Br and I; and p is an integer from 0 to 9.SELECTED DRAWING: None

This invention discloses a battery, a battery pack, and an electrical device. The battery includes a casing, a core, a column, a first membrane, and a second membrane. The casing has an inner cavity, and the core is assembled within the inner cavity. The column supports the core to prevent it from collapsing. The column has a first cavity for storing a lithium replenishment medium and a second cavity for storing a fire-fighting medium. The first cavity has a first hole in its wall, and the second cavity has a second hole in its wall. The first membrane seals the first hole. When subjected to a first pressure, the first membrane ruptures, allowing the lithium replenishment medium in the first cavity to flow into the inner cavity through the first hole. The second membrane seals the second hole. When subjected to a second pressure, the second membrane ruptures, allowing the fire-fighting medium in the second cavity to flow into the inner cavity through the second hole. The second pressure is greater than the first pressure. The battery of this invention enables secondary lithium replenishment, improving the problems of short battery life and severe battery degradation. Furthermore, it has a fire-fighting function in the event of thermal runaway or rapid gas generation, ensuring the safety of battery use.

The present disclosure provides a lithium supplementing diaphragm for a lithium ion battery, a lithium ion battery, and a preparation method, and belongs to the field of batteries. The lithium supplementing diaphragm comprises a diaphragm base, a pre-lithium layer, a first protective layer, and a second protective layer. The pre-lithium layer is located on one side of the diaphragm base, and the first protective layer is located on the side of the pre-lithium layer away from the diaphragm base. The second protective layer is arranged on the first surface of the diaphragm base. The material of the second protective layer comprises a polymer and an ester compound. The polymer is insoluble in the electrolyte of the lithium ion battery. The ester compound is soluble in the electrolyte of the lithium ion battery. The second protective layer of the lithium supplementing diaphragm of the present disclosure is an organic material layer, and the preparation method does not need to be carried out in a vacuum, thereby being low in cost. The first protective layer and the second protective layer isolate the lithium metal in the pre-lithium layer from water, carbon dioxide, oxygen, nitrogen, and the like in the air during the assembly process, thereby reducing the consumption of lithium in the pre-lithium layer and improving the utilization rate of lithium. The technical problems of the prior art, such as high lithium consumption of the lithium supplementing diaphragm and complex preparation method, are solved.

The present application relates to an electrode plate (10) and a manufacturing method therefor, an electrode assembly, a secondary battery (100), and a power consuming device. Lithium replenishing spaces (13) are disposed on a current collection structure (11), such that the lithium replenishing spaces (13) communicate with an active layer (12) on one side; and the battery (100) is replenished with lithium by using lithium replenishing agents in the lithium replenishing spaces (13) to offset an irreversible lithium consumption in a cycle process, so as to increase the total capacity and the energy density of the battery (100). According to the present application, due to average weights MA of corresponding active materials in different distribution regions (14) on the active layer (12), a sum V0 of internal volumes of lithium replenishing spaces (13) corresponding to each of the distribution regions (14) is controlled in a positively correlated manner based on a change in the average weights of the active materials in the different distribution regions (14), that is, a sum of internal volumes of corresponding lithium replenishing spaces (13) in a second distribution region (14b) is relatively large, and a sum of internal volumes of corresponding lithium replenishing spaces (13) in a first distribution region (14a) is relatively small. As a result, the different distribution regions (14) are replenished with different lithium. This implements quantitative and precise lithium replenishment, thereby increasing the energy density of the battery (100) and prolonging the lifespan of the battery.

The battery processing method for processing the lithium-ion battery that includes a positive electrode material and a negative electrode material and is configured by laminating the positive electrode material and the negative electrode material in a lamination direction, and wherein gas is internally present, the battery processing method including: a gas extrusion step of extruding the gas toward a peripheral edge portion of the lithium-ion battery in a plane perpendicular to the lamination direction; and a cooling and charging step of depositing lithium on the negative electrode material by charging the lithium-ion battery while cooling.

To provide a performance recovery method for a lithium-ion secondary battery that can achieve an optimal recovered state of the lithium-ion secondary battery.SOLUTION: In a method for recovering performance of a lithium-ion secondary battery by doping lithium ions into a positive electrode included in the lithium-ion secondary battery whose capacity has been reduced, the doping of lithium ions is performed by discharge using a lithium electrode as a counter electrode in an electrolyte, and the discharge is performed to a predetermined potential V_E (V).SELECTED DRAWING: Figure 6

The present invention provides a method and equipment for recovering positive electrode active materials of lithium-ion batteries, wherein the recovery method comprises the following steps: (1) soaking scrapped positive electrode sheets in NMP, heating to dissolve the binder in the positive electrode sheets in the NMP, filtering, and drying to obtain a positive electrode waste material; and (2) adding LiNO3 and LiOH eutectic lithium salts to the positive electrode waste material, mixing them evenly, and then using a solid-phase method to repair the positive electrode waste material with lithium, followed by high-temperature sintering. The present invention dissolves the binder in NMP to separate the positive electrode waste material from the current collector, and then performs solid-phase lithium repair with the eutectic lithium salt, and then performs high-temperature sintering to obtain the positive electrode active material. The use of eutectic lithium salts has a lower sintering temperature, and at a lower sintering temperature, the melted lithium salt can penetrate into the surface and interior of the positive electrode waste material, making the sintered and repaired positive electrode active material more uniform. The use of a solid-phase method for one-step sintering has a high recovery rate and avoids the need to prepare an intermediate product in a hydrothermal reaction and then wash and calcine the intermediate product.

The present invention relates to the field of batteries, and in particular to a high-capacity battery assembly, a repair mechanism, and a repair method for the high-capacity battery assembly, so as to prolong the service lives of high-capacity batteries while solving the problem of having a difficulty in assembling shared pipeline assemblies of existing high-capacity batteries. The high-capacity battery assembly includes a high-capacity battery and a repair mechanism. The high-capacity battery includes a housing and battery cells arranged in the housing; the housing is provided with an electrolyte region of the inner cavity of each battery cell; an avoidance hole capable of enabling an electrode terminal of each battery cell to extend out is formed on a housing top plate; the electrode terminal of each battery cell extends out from the avoidance hole on the housing top plate, and a region of the housing corresponding to the avoidance hole is fixed and sealed with a shell of the battery cell; and the repair mechanism is connected with the high-capacity battery, and is configured for repairing the high-capacity battery having an attenuated capacity or inhibiting the attenuation speed of the high-capacity battery, so as to improve the performance of the high-capacity battery and prolong the cycle life of the high-capacity battery.

A method for periodic deep discharge to extract lithium in silicon-dominant anodes may include providing a cell comprising a cathode, a separator, and a silicon-dominant anode; charging and discharging the cell through a plurality of cycles; and, following the plurality of cycles, performing one or more deep discharge cycles, where each of the one or more deep discharge cycles comprises a cutoff voltage below a normal operating voltage range of the cell. The one or more deep discharge cycles may comprise a C / 10 or lower or C / 20 or lower discharge current. The one or more deep discharge cycles may include a cutoff voltage of 3.2 V or less, a cutoff voltage of 2.5 V or less, a cutoff voltage of 1.5 V or less, or a cutoff voltage of 1 V or less. The cell may be configured at a higher temperature during the one or more deep discharge cycles.

Methods and devices are disclosed herein pertaining to an auxiliary electrodes for transferring of carrier ions to into a batteries such as secondary batteries e.g., a lithium-ion batteries. The batteries may comprise silicon based active material. The batteries may comprise stacked unit cells. The auxiliary electrode and battery may be sealed in an enclosure.

Methods for operating a flooded electrolyte battery cell used in motive service to prevent the loss of water. When charging the cell, water in the electrolyte decomposes electrolytically to oxygen and hydrogen gases. The method includes catalytically recombining the oxygen and hydrogen gases to water vapor, inhibiting venting of the oxygen and hydrogen gases and water vapor from the cell, providing fluid communication between the catalyst and the electrolyte for the oxygen and hydrogen gases and water vapor, and hygroscopically absorbing the water vapor into the electrolyte. Devices and battery cells for carrying out the method are also provided.

The present invention proposes a method for recycling and modifying graphite negative electrode materials from spent batteries, comprising: dispersing the spent battery's negative electrode sheets in water, collecting the graphite negative electrode material separated from the current collector, washing it multiple times with deionized water, and filtering it to obtain a recovered graphite negative electrode material; dispersing the recovered graphite negative electrode material, graphene oxide, and silicon dioxide in a solvent, mixing the resulting dispersions, and then adding a reducing agent for a reduction reaction to obtain a precursor composite material; and carbonizing the precursor composite material at high temperature to obtain a regenerated graphite negative electrode material. The present method combines a recycling process with performance modification of the recycled graphite, resulting in simple operation and low energy consumption. By compounding the recovered graphite negative electrode material with graphene oxide and silicon dioxide, it not only repairs the surface of the recovered graphite but also significantly improves its capacity, rate capability, and cycle performance.

Provided is a battery processing method for efficiently recovering lithium from a lithium ion battery. A battery processing method for processing a lithium ion battery (1) including a positive electrode material (31) and a negative electrode material (35) includes a lithium deposition step (S2) for depositing lithium on the negative electrode material (35) by performing pulse charging on the lithium ion battery (1) while cooling, in which a charging stage (Fc) and a charging stop stage (Fs) are alternately performed during the pulse charging, and the charging stage (Fc) is performed at least multiple times, and in the charging stage (Fc), the charging stop stage (Fs) is performed at least multiple times, and in the charging stop stage (Fs), the charging stop stage (Fs) is performed at least multiple times. The lithium ion battery (1) is cooled.

The invention provides a method for regenerating a lithium ion secondary battery, which can improve the implementation efficiency. A method for regenerating a lithium ion secondary battery disclosed herein includes: a Li deposition step in which a lithium ion secondary battery is subjected to pulsed charging and discharging in a low-temperature environment so as to deposit Li in a negative electrode; and an active material disintegration step in which the positive electrode active material is disintegrated by repeatedly charging and discharging the lithium ion secondary battery in a range in which the positive electrode is located in a low potential region.

To appropriately mitigate reaction unevenness in an all-solid-state battery.SOLUTION: A method for regenerating an all-solid-state battery includes the steps of: preparing an all-solid-state battery having a copper-free negative electrode; and performing overdischarge control of the all-solid-state battery. The overdischarge control is control for mitigating reaction unevenness, which is unevenness in the electrode reaction accompanying charging and discharging of the all-solid-state battery, by discharging the all-solid-state battery until the potential of the negative electrode becomes lower than the copper elution potential.SELECTED DRAWING: Figure 3

The invention relates to the field of secondary batteries, and provides a capacity repairing method of a secondary battery, the secondary battery and electric equipment, which are at least beneficial to repairing the attenuated capacity of the secondary battery. The capacity repairing method comprises the following steps: providing a to-be-repaired secondary battery; discharging the secondary battery to be repaired to a safe capacity; vacuumizing the secondary battery to be repaired so as to discharge residual gas in the secondary battery to be repaired; a capacity repairing agent is injected into the secondary battery to be repaired, the material of the capacity repairing agent comprises a chemical active material, the structure of the chemical active material meets alpha-beta... gamma, an alpha group and a beta group are connected in a covalent bond mode, and the beta group and a gamma group are connected in a covalent bond or ionic bond mode. The beta group is used for providing a site for electrochemical reaction; carrying out charging and discharging treatment on the secondary battery to be repaired; and packaging the secondary battery to be repaired to obtain the repaired secondary battery.

Provided is a method for repairing the capacity of a waste lithium-ion battery, which belongs to the field of batteries, so as to improve the charge and discharge cycle performance of the lithium-ion battery, and reduce the use costs of the battery while reducing the pressure of the waste lithium-ion battery on environments. The method includes: first, deeply over-discharging a waste lithium-ion battery; second, discharging a free electrolyte solution and a gas in an inner cavity of the waste lithium-ion battery together with impurities in the inner cavity of the waste lithium-ion battery; then injecting a first electrolyte solution into the inner cavity of the treated waste lithium-ion battery, and allowing the battery to stand for a set time; and testing the capacity of the battery, completing the repair of the capacity of the waste lithium-ion battery if a set target value is reached, otherwise, continuing execution of the operations above. The present disclosure is simple in operation and significant in capacity recovery effect, and greatly prolongs the cycle life of a lithium-ion battery.

An apparatus, system, and method for removing impurities from a non-aqueous electrolyte used in an electrochemical cell. The apparatus includes a vessel having one or more chambers with an inlet and an outlet configured to allow the flow of the electrolyte through the one or more chambers; and an inorganic scavenging agent located within the one or more chambers. The inorganic scavenging agent includes one or more types of zeolite particles, at least one type of absorbent filler particles, or a combination of the zeolite and absorbent filler particles. The inorganic scavenging agent absorbs one or more of moisture, free transition metal ions, or hydrogen fluoride (HF) that is present as impurities in the non-aqueous electrolyte.

To provide a recycling method of a lithium ion secondary battery which does not require discharge by a resistor and can suppress generation of copper contamination in a positive electrode.SOLUTION: A method for recycling a used lithium ion secondary battery including a laminate having a positive electrode, a separator, and a negative electrode, an exterior body accommodating the laminate, and an electrolytic solution, the method comprising: a first step of exposing the laminate to a gas containing water vapor through the electrolytic solution; and a second step of converting lithium ions contained in the negative electrode into a lithium compound.SELECTED DRAWING: None

To provide a lead sulphate coating removal device which is low in power consumption and which gives no damage to an electrode of a lead storage battery.SOLUTION: A lead sulfate coating removal device which removes a lead sulfate coating generated on an electrode of the lead storage battery and which comprises: a generation unit which generates, on the basis of a signal extracted from the lead storage battery, a removal signal for the lead sulfate coating having a peak value of 550-750 mA, a pulse width of 5-100 nsec, and a frequency of 5-50 kHz; and a supply unit which supplies the removal signal generated by the generation unit to the electrode of the lead storage battery.SELECTED DRAWING: Figure 1

A purification process for recycled graphite for use as anode material in Li-ion batteries includes a sequence of leaching and heat treatment followed by washing with deionized (DI) water and an acid wash. A graphite source results from a suitable process such as acid leaching of black mass from a batteiy recycling stream, where the leach removes a substantial portion of metal salts used for cathode materials. Impurities, most notably aluminum oxide and residual cathode materials, are often present in trace amounts in the graphite source. A sequence of heating (sintering) and pH adjusted washing further purifies the graphite into a modified, recycled graphite exceeding 99.5% purity for use in a recycled battery.