Prime Planet Energy & Solutions Patente

The present disclosure provides a positive plate, and a method for collecting positive electrode materials included in the positive plate. The positive plate disclosed herein includes an electrode sheet and a positive electrode mixture layer containing a positive electrode active material, in which a water-soluble adhesive layer containing a water-soluble binder and a conductive material is interposed between the electrode sheet and the positive electrode mixture layer.

A power storage device (3) includes a first electrode assembly (81), a second electrode assembly (91), and a housing case (20). The housing case (20) includes a first end plate (22a) and a second end plate (21aa) on which an exhaust valve (21ab) is formed, The first electrode assembly (81) and the second electrode assembly (91) are disposed such that a first winding axis (α1) and a second winding axis (α2) pass through the first end plate (22a) and the second end plate (21aa). The first electrode assembly (81) has a first hollow portion (S1) formed therein. The second electrode assembly (91) has a second hollow portion (S2). When the exhaust valve (21ab) is viewed in plan view from an axial direction, the exhaust valve (21ab) is disposed so as to be away from at least one of a first hollow portion (S1) and a second hollow portion (S2).

The present disclosure provides a method for producing a precursor of a positive electrode active material that makes it possible to decrease waste generation. The method for producing a precursor of a positive electrode active material according to the present disclosure, includes: a step of bringing a raw material containing Ni and Co into contact with an aqueous phase containing ammonia and ammonium sulfate to leach Ni and Co into the aqueous phase; a step of removing and recovering ammonia from the aqueous phase; a step of dissolving a manganese salt in the aqueous phase from which ammonia has been removed; and a step of obtaining a carbonate salt containing Ni, Co, and Mn by crystallization with ammonium bicarbonate from the aqueous phase in which the manganese salt has been dissolved.

The power storage device (2A) includes an electrode assembly (101), a housing case (20) that houses the electrode assembly (101), and an exhaust valve (21ab) formed on the housing case (20). The housing case (20) includes a first end plate (22), a second end plate (21a), and a peripheral wall (21b) provided between the first end plate (22) and the second end plate (21a). A portion of the peripheral wall (21b) on the side of the second end plate (21a) is thinner than a portion thereof on the side of the first end plate (22). The exhaust valve (21ab) is formed on the second end plate (21a).

The present invention provides a novel method capable of recovering Ni and Co as well as Cu from a battery waste containing Ni, Co, and Cu with a high recovery ratio, in which a leaching agent is suitable for reuse. The method for reproducing valuable metals according to the present disclosure includes: a Cu leaching step of leaching Cu, using an ammonia water, from battery waste containing Ni, Co, and Cu into the ammonia water; and an Ni and Co leaching step of leaching Ni and Co, using an ammonia aqueous solution containing ammonia and at least one inorganic ammonium salt selected from a group consisting of ammonium sulfate and ammonium carbonate, from a solid residue obtained in the Cu leaching step into the ammonia aqueous solution.

A method of estimating a salt concentration in an electrolyte solution of a secondary battery (1) includes: a capacity acquiring step S1 of acquiring a capacity of a secondary battery (1) that is to be an estimation object; a discharging time acquiring step S2 of acquiring a discharging time when the secondary battery (1) is discharged under a predetermined condition; and a salt concentration estimating step S3 of estimating the salt concentration in the electrolyte solution of the secondary battery (1) based on the acquired capacity of the secondary battery (1), the acquired discharging time, and a table recording a relationship between the capacity, the discharging time, and the salt concentration in the electrolyte solution of the secondary battery (1), related to the secondary battery (1) that is to be the estimation object.

The present invention provides a novel method that makes it possible to efficiently separate Cu from battery waste containing Ni, Co, and Cu. A method for reproducing valuable metals according to the present disclosure includes: a step of roasting waste of a lithium ion secondary battery to obtain a roasted product; and a step of leaching Cu from the roasted product using an ammonia water. The waste contains Ni, Co, and Cu. The roasting is performed such that the roasted product contains Ni and Co in an oxide form and Cu in a metal form.

The present invention provides a novel method capable of recovering Ni and Co from a battery waste containing Ni and Co while adjusting an Ni/Co ratio. The method for reproducing the positive electrode material according to the present disclosure includes a step of leaching Ni and Co, using an ammonia aqueous solution containing ammonia and ammonium sulfate, from a battery waste containing Ni and Co into the ammonia aqueous solution. Herein, oxygen is fed to the ammonia aqueous solution in the leaching.

A method for manufacturing an electricity storage device includes a case body preparing step, a closing plate preparing step, and a welding step. A closing plate prepared in the closing plate preparing step has a closing portion and a protruding portion. The closing portion covers an opening of the case body and overlaps an outside of the opening. The protruding portion protrudes outward beyond an outer edge of the opening continuously in a circumferential direction of the opening, with the closing portion closing the opening. In the welding step, a boundary between the case body and the closing plate is welded by irradiating the protruding portion of the closing plate with laser light, with the closing plate mounted on the case body so as to close the opening, to melt the protruding portion.

A power storage device includes: an electrode assembly (200) including a first electrode (240), a second electrode (210) having a polarity different from a polarity of the first electrode (240), and a first electrode tab group (250, 280) electrically connected to the first electrode (240); a case (100) that accommodates the electrode assembly (200); a first conductive member (420) connected to the first electrode tab group (250, 280); a second conductive member (440) connected to the first conductive member (420); and an insulating member (460) disposed between the first conductive member (420) and the second conductive member (440), wherein the first electrode tab group (250, 280) is located at one end portion of the electrode assembly (200), and the insulating member (460) is connected to the first conductive member (420).

A method of manufacturing a power storage device includes: after producing an electrode assembly (200), joining a first electrode tab group (250, 280) to a first conductive member (420), and attaching an insulating member (460) to the first conductive member (420); after attaching the insulating member (460) to the first conductive member (420), inserting the electrode assembly (200) into a case main body (110) from a first end portion side of the electrode assembly (200) through a second opening (113); after inserting the electrode assembly (200) into the case main body (110), electrically connecting a first electrode terminal (302) provided on a first sealing plate (130), and the first conductive member (420); and after electrically connecting the first electrode terminal (302) and the first conductive member (420), sealing a first opening (114) by the first sealing plate (130).

An aspect of a fabrication method disclosed here includes a preparation step S1 of preparing a battery assembly (2) and an injection step S2 of injecting an electrolyte (E) into the battery assembly (2). In the injection step S2, the electrolyte (E) is injected from a liquid inlet (120A) inserted into an injection hole (22) in a state where the battery assembly (2) is placed with a sealing plate (20A) having the injection hole (22) facing upward.

In forming a joining portion, vibration is applied in a state in which a first protuberance (11) and a first region (21) face each other with a first electrode tab group (220) being interposed between the first protuberance (11) and the first region (21), the first protuberance (11) is in abutment with the first outer surface of the first electrode tab group (220), and the first region (21) and the plurality of second protuberances are in abutment with the second outer surface of the first electrode tab group (220).

An aspect of a fabrication method disclosed here includes a preparation step S1 of preparing a battery assembly (2) and an injection step S2 of injecting an electrolyte (E) into the battery assembly (2). In the injection step S2, the electrolyte (E) is injected from a liquid inlet (120A) inserted into an injection hole (22) in a state where the battery assembly (2) is placed with a sealing plate (20A) having the injection hole (22) facing upward.

The present method of manufacturing a power storage device includes: producing an electrode assembly (200) having a first tab (220) and a second tab (270); after the producing the electrode assembly (200), accommodating the first tab (220) and the second tab (270) in a tab accommodation space (670) through a communication space (600) using the spacer (600), the spacer (600) having the communication space (680), the communication space (680) connecting the tab accommodation space (670) and a space external to the spacer (600); and after the accommodating the first tab (220) and the second tab (270), curving the first tab (220) and the second tab (270) in a state in which a first guide portion (G1) faces a main outer surface of the first tab (220) and a second guide portion (G2) faces a main outer surface of the second tab (270).

In an injecting step, a preset amount of an electrolytic solution is injected by multiple separate steps while first processing of injecting the electrolytic solution up to a position higher than a reference height set to be equal to or higher than an upper end of an electrode body at inside of the case in a state where the battery assembly is disposed with the injection port facing up, second processing of depressing the case by reducing a pressure in the case and maintaining a liquid surface level of the electrolytic solution injected in the first processing at a position equal to or higher than the reference height, and third processing of, after the pressure in the case is reduced to a preset pressure, releasing the inside of the case are repeated.

A method of manufacturing a power storage device includes: producing an electrode assembly (200) having a first electrode tab group (220); and forming a joining portion at which first electrode tabs (230) in the first electrode tab group (220) are joined together by applying vibration to the first electrode tab group (220) by a horn (10) in a state in which the first electrode tab group (220) is sandwiched between the horn (10) and an anvil (20) in a stacking direction of the first electrode tabs (230), wherein a line-shaped protuberance (11) is provided in a surface of one of the horn (10) and the anvil (20), the surface being to be in abutment with a first outer surface of the first electrode tab group (220), and in the forming the joining portion, the vibration is applied in a state in which the line-shaped protuberance (11) is in abutment with the first outer surface of the first electrode tab group (220).

Provided is a technique for suppressing a surface pressure of an electrode assembly from becoming non-uniform. A herein disclosed electricity storage device includes an electrode assembly, a case, and a spacer. An outer surface of the electrode assembly includes a first surface on one of end parts in a laminate direction, a second surface on the other end part in the direction, and a third surface between the first surface and the second surface. The first surface, the second surface, and the third surface are configured by the separator. A first end part in a longitudinal direction of the separator is arranged on the third surface. The separator includes a first area containing the first end part and arranged on the third surface. The first area is configured to cover a part of the spacer, and a joint part where the first area is joined to the spacer.

In a power storage device, a welding portion (800) at which a first conductive member (420) and a second conductive member (440) are welded is formed, an outer peripheral edge of a base portion (470A) includes a first portion (471) located in a vicinity of the welding portion (800) and a second portion (472) other than the first portion (471), and the outer peripheral wall is not formed in the first portion (471), or a maximum value of a height of the outer peripheral wall in the first portion (471) is lower than a maximum value of a height of an outer peripheral wall (472A, 473B) in the second portion (472).

A method of manufacturing a power storage device includes: inserting an electrode assembly (200) into a case main body (110); and after inserting the electrode assembly (200) into the case main body (110), joining a first conductive member (420) and a second conductive member (440), the first conductive member (420) being electrically connected to a first electrode (240) through a first electrode tab, wherein at least before joining the first conductive member (420) and the second conductive member (440), at least one of the first conductive member (420) and the second conductive member (440) has a projection (420A, 440A), and the joining the first conductive member (420) and the second conductive member (440) includes applying an energy ray (2) to the projection (420A, 440A) so as to join the first conductive member (420) and the second conductive member (440).

An electrode sheet manufacturing device includes a conveyance device, a first press device, a second press device, and a stepped roll pressing device. The first press device is a device that roll-presses a non-formed portion of an electrode sheet by a pair of rubber rolls. At least one of the pair of rubber rolls includes a shaft and an elastic body. A diameter of the shaft in a portion thereof that presses a boundary portion between the non-formed portion and the electrode active material layer is larger than a diameter of the shaft in a portion thereof that presses a more outer side than the boundary portion. A thickness of the elastic body in the portion thereof that presses the boundary portion is smaller than a thickness of the elastic body in the portion thereof that presses the more outer side than the boundary portion.

A method of manufacturing a battery cell (10S) including an electrode body (10) including electrode foils (1) having active material layer formed portions (11) and active material layer non-formed portions (12), and a current collecting terminal joined to the active material layer non-formed portions (12) is provided. The method includes a first step of causing the electrode foils (1) to contact with and adhere to each other in the active material layer non-formed portions (12), to form a reduced thermal resistance portion (RT) of the electrode foils (1) in which thermal resistance in a contact adhered portion of the electrode foils (1) is lower than that in a discrete portion of the electrode foils (1), and a second step of joining the electrode foils (1) and the current collecting terminal by laser welding while the reduced thermal resistance portion (RT) is in contact with the current collecting terminal to connect a nugget boundary of a laser welded portion (LY) to the reduced thermal resistance portion (RT).

An electrical energy storage module (500) disclosed herein includes first and second electrical energy storage devices (100), and a spacer (200). The spacer (200) includes a base part (290), a first uneven structure (210) that is provided on a first surface (290Rr) of the base part (290) and includes a plurality of first protrusion parts (210p) and a first depression part (210r), and a second uneven structure (220) that is provided on a second surface (290F) of the base part (290) and includes a second protrusion part (220p). The second protrusion part (220p) of the second uneven structure (220) is provided at a position corresponding to the first depression part (210r) of the first uneven structure (210).

The negative electrode of the secondary battery of a present disclosure is a negative electrode for secondary battery that includes a negative electrode current collector, and a negative electrode active material layer supported by the negative electrode current collector. The negative electrode active material layer includes a lower layer positioned at a side of the negative electrode current collector and an upper layer positioned at a surface side, the upper layer contains a first graphite particle and a first Si-containing particle, as a negative electrode active material, and the lower layer contains a second graphite particle and a second Si-containing particle, as the negative electrode active material. Then, a mean circularity C1 of the first Si-containing particle is larger than a mean circularity C2 of the second Si-containing particle.

The present disclosure provides a new method capable of efficiently collecting Ni, Co, and Mn from battery waste containing Ni, Co, and Mn. A method for recycling a positive electrode material according to the present disclosure includes: a Mn leaching step of leaching Mn into an aqueous phase by performing ammonia leaching on battery waste containing Ni, Co, and Mn under a condition that a Mn leaching rate is 70% or more, and a ratio of the Mn leaching rate is 65% or more with respect to a total of a Ni leaching rate, a Co leaching rate, and the Mn leaching rate; and a Ni and Co leaching step of leaching Ni and Co into an aqueous phase by performing ammonia leaching on a solid residue obtained in the Mn leaching step under a condition that a Mn leaching rate is less than 1%.

The present disclosure provides a new method capable of separating Li and Al from waste of at least a positive electrode. A method for recycling a positive electrode material according to the present disclosure includes bringing waste of at least a positive electrode containing Li and Al into contact with water under presence of pressurized CO<2> to allow Li and Al to leach into the water.

Provided is a technique to suppress a reduction in a capacity maintenance rate. In the negative electrode disclosed herein, a negative electrode active material layer contains first Si-containing particles and second Si-containing particles. When an expansion rate S2 of the second Si-containing particles is treated as 1, an expansion rate S1 of the first Si-containing particles is more than 0.3 and not more than 0.9. The first Si-containing particles and the second Si-containing particles include LiF coating layers. A second peak intensity ratio of the second Si-containing particles is larger than the first peak intensity ratio of the first Si-containing particles.

Provided is a negative electrode that contains Si-containing particles and graphite particles, and causes less swelling when a secondary battery is repeatedly charged and discharged. The negative electrode of a secondary battery of the present disclosure includes a negative electrode current collector, and a negative electrode active material layer supported by the negative electrode current collector. The negative electrode active material layer includes a first layer located on a surface layer part side, and a second layer located on a negative electrode current collector side. The first layer contains first graphite particles and first Si-containing particles. The second layer contains second graphite particles and second Si-containing particles. An aspect ratio of the first Si-containing particles is larger than an aspect ratio of the second Si-containing particles. The aspect ratio of the first Si-containing particles is 4.0 to 10.0. The aspect ratio of the second Si-containing particles is 1.0 to 3.0.

Provided is a technique to suppress a swell of the negative electrode. In the negative electrode disclosed herein, a negative electrode active material layer includes a first layer at a negative electrode current collector side and a second layer at a surface layer side. The first layer contains first Si-containing particles. The second layer contains second Si-containing particles. A Si content rate of the second Si-containing particles is smaller than a Si content rate of the first Si-containing particles. Each of the first Si-containing particles and the second Si-containing particles include a LiF coating layer. A second peak intensity ratio relating to a LiF of the second Si-containing particles is smaller than a first peak intensity ratio relating to the LiF of the first Si-containing particles. A difference between the first peak intensity ratio and the second peak intensity ratio is 0.050 to 1.00.

A negative electrode (60) containing Si-containing particles (14, 16) and graphite particles (12) and being capable of suppressing capacity degradation when a secondary battery is repeatedly charged and discharged is provided. The negative electrode of a secondary battery of the present disclosure includes a negative electrode current collector (62), and a negative electrode active material layer (64) supported by the negative electrode current collector. The negative electrode active material layer contains graphite particles, first Si-containing particles (14), and second Si-containing particles (16). The content rate of Si in the first Si-containing particles is smaller than the content rate of Si in the second Si-containing particles. When a density of a molded body obtained by uniaxially pressurizing and molding 1 g of particles at 25°C and at 60 MPa into a tablet having a diameter of 20 mm is defined as a consolidation density, the consolidation density of the first Si-containing particles is 0.9 g/cm<3> or more, and that of the second Si-containing particles is less than 0.9 g/cm<3>.

Provided is a technique to suppress a capacity maintenance rate reduction. A negative electrode disclosed herein includes a negative electrode active material layer including a first Si-containing particle and a second Si-containing particle. When an expansion rate S2 of the second Si-containing particle after an electrical charge A with respect to one before the electrical charge A is treated as 1, an expansion rate S1 of the first Si-containing particle after the electrical charge A with respect to one before the electrical charge A is more than 0.3 and not more than 0.9. When the mean particle diameter (D50) of the first Si-containing particle is treated as 1, the mean particle diameter (D50) of the second Si-containing particle is more than 0.1 and not more than 1.

Provided is a negative electrode (60) that contains Si-containing particles (14, 18) and graphite particles (16), and causes less swelling when a secondary battery is repeatedly charged and discharged. The negative electrode of a secondary battery of the present disclosure includes a negative electrode current collector (62), and a negative electrode active material layer (64) supported by the negative electrode current collector. The negative electrode active material layer includes a first layer (64a) located on a surface layer part side, and a second layer (64b) located on a negative electrode current collector side. The first layer contains first graphite particles and first Si-containing particles (14). The second layer contains second graphite particles and second Si-containing particles (18). The content rate of Si in the first Si-containing particles is smaller than the content rate of Si in the second Si-containing particles. When a density of a molded body obtained by uniaxially pressurizing and molding 1 g of particles at 25°C and at 60 MPa into a tablet having a diameter of 20 mm is defined as a consolidation density, a consolidation density of the first Si-containing particles is 0.9 g/cm<3> or more and a consolidation density of the second Si-containing particles is less than 0.9 g/cm<3>.

A memory storage unit of a battery system separately stores separately storing a start-up program related to starting up of a measuring means, a measurement program related to a measurement, and a state calculation program related to calculating of a battery state of a battery cell. A controller executes a first secure boot for a first program including the start-up program and thereafter executes a process contained in the first program. While the controller is executing the process contained in the first program, the controller executes a second secure boot for a second program including the measurement program or the state calculation program. The controller executes a process contained in the second program after the process of the first program is executed and the second secure boot is executed.

The present disclosure provides a manufacturing method for an electrical energy storage device (100) including an electrode body (20), a case (10), a first electrode terminal (30) attached to a bottom wall (12a) of the case (10), and a spacer (80). This manufacturing method includes a step of integrating a first current collecting member (50) attached to the electrode body (20) with the spacer (80), a step of inserting the electrode body (20) integrated with the spacer (80) into a case main body (12), and a step of joining the first current collecting member (50) and the first electrode terminal (30).

A negative electrode containing Si-C composite particles (10) and graphite particles (14), and capable of suppressing capacity degradation when a secondary battery is repeatedly charged and discharged is provided. The negative electrode of a secondary battery of the present disclosure includes a negative electrode current collector (62), and a negative electrode active material layer supported by the negative electrode current collector. The negative electrode active material layer contains graphite particles and Si-C composite particles as a negative electrode active material. Each of the Si-C composite particles includes a porous skeleton (11) made of carbon, and Si-containing particles located in voids (11a) of the porous skeleton. A coating (13) including LiF is formed on at least a part of an outer surface of each of the Si-C composite particles.

The negative electrode of the secondary battery includes a negative electrode current collector and a negative electrode active material layer that is supported by the negative electrode current collector and that contains a negative electrode active material. The negative electrode active material layer includes an upper layer and includes a lower layer. The negative electrode active material contains at least a graphite particle, and a Si-containing particle in which a carbon and a Si are compounded to be composite. A response area size of the negative electrode active material contained in the upper layer is smaller than a response area size of the negative electrode active material contained in the lower layer, and a Si amount of a first Si-containing particle contained in the upper layer is smaller than a Si amount of a second Si-containing particle contained in the lower layer.

An electrical energy storage device (100) disclosed herein includes an electrode body (20) including a first electrode (22), a case (10), and a first electrode terminal (30) electrically connected to the first electrode (22) through a first conductive member (50). The case (10) includes a case main body (12) with a bottomed tubular shape that includes a bottom wall (12a) and an opening (12h) facing the bottom wall (12a), and a sealing plate (14) that seals the opening (12h) of the case main body (12). The first electrode terminal (30) is attached to the bottom wall (12a) and includes a penetration hole (30h). The first conductive member (50) is inserted into the penetration hole (30h) and joined to the first electrode terminal (30).

The present disclosure provides a manufacturing method for an electrical energy storage device (100) including an electrode body (20), a case (10), and a first electrode terminal (30) attached to a bottom wall (12a) of the case (10). This manufacturing method includes a step of electrically connecting a first current collecting member (50) to the electrode body (20), a step of inserting the electrode body (20) into the case main body (12) and disposing at least a part (52) of the first current collecting member (50) into a first concave part (30r) of the first electrode terminal (30), and a step of delivering an energy beam (LB) from a side of the first electrode terminal (30), thereby joining by welding the part of the first current collecting member (50) that is disposed inside the first concave part (30r) to the first electrode terminal (30).

A method of manufacturing a non-aqueous electrolyte secondary battery includes the steps of obtaining a battery assembly, charging, and sealing. The battery assembly includes an electrode body, a non-aqueous electrolyte solution, and a battery case including a through hole. The step of charging involves charging the battery assembly. The step of sealing involves sealing the through hole with a sealing member after the charging step. In the step of charging, the charging is performed under a charging condition that causes a temperature of a gas inside the battery case increases. The step of sealing is performed while keeping the temperature inside the battery case having been increased. After the step of sealing, the temperature inside the battery case decreases, and the gas inside the battery case contracts, to thereby cause a contraction and/or an internal pressure decrease of the battery case.

A battery pack (1) includes: a plurality of battery modules (20) each including a plurality of battery cells (2) arranged in a first direction; and a case (40) that accommodates the plurality of battery modules (20), wherein the case (40) includes a case main body (43) having a bottom portion (41) and a side wall portion (42) that surrounds a periphery of the bottom portion (41), a cover body (44) that covers an opening (43a) of the case main body (43), and a partition plate (45) that partitions a battery module (20) disposed on the bottom portion (41) side and a battery module (20) disposed on the cover body (44) side, and by fixing the partition plate (45) to the side wall portion (42), one battery module (20) is disposed between the partition plate (45) and the bottom portion (41), and another battery module (20) is disposed between the partition plate (45) and the cover body (44).