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SECONDARY BATTERY AND ELECTROCHEMICAL DEVICE

Resumen de: EP4794041A1

0001 An embodiment of the present application provides a secondary battery and an electrochemical device. The secondary battery includes an electrode assembly, where the electrode assembly is a flat wound structure, the electrode assembly includes a first electrode sheet, a second electrode sheet, and a separator, the separator is disposed between the first electrode sheet and the second electrode sheet, and an innermost electrode sheet of the electrode assembly is the first electrode sheet; where a length of the electrode assembly is denoted as L, a width of the electrode assembly is denoted as W, a thickness of the electrode assembly is denoted as H, meeting 0.9 ≤ L/W ≤ 1.1 and H ≤ 3 mm, the electrode assembly further includes an adhesive layer, an innermost turn of the first electrode sheet includes a first straight segment, a first bent segment, a second straight segment, and a second bent segment connected sequentially, the first electrode sheet has a first surface facing a winding core of the electrode assembly, and at least a portion of the adhesive layer is disposed on the first surface of the first straight segment and/or the first surface of the second straight segment. The technical solution according to some embodiments of the present application can improve the safety performance and cycling performance of the secondary battery.

SYSTEM AND METHOD FOR DEGRADATION BASED BATTERY CONTROL

Resumen de: AU2024360191A1

A method can include receiving battery sensor measurements, determining a state of the battery (e.g., SoH, SoC, SoE, SoP, etc. or information correlated therewith such as internal resistance, open circuit voltage, etc.), estimating an aging profile or degradation of the battery for one or more operating conditions, and determining operating conditions for the battery based on the estimated degradation.

POWER STORAGE DEVICE AND METHOD FOR MANUFACTURING SAME

Resumen de: EP4794040A1

Provided are a power storage device (10) which can suppress the growth of dendrites while suppressing increases in the mass and volume of the power storage device, and a method for manufacturing the power storage device. The power storage device includes a positive electrode (11), a negative electrode (15), and a separator (14) for isolating the positive electrode and the negative electrode. The negative electrode includes an active material layer (17), an electrolyte layer (18), and a conduction layer (19), which are arranged in this order toward the positive electrode. The active material layer includes an active material which reduces carrier ions. The electrolyte layer includes an electrolytic solution and a solid electrolyte having conductivity for carrier ions, and is in contact with the active material layer. The conduction layer has electron conductivity, is in contact with the electrolyte layer, and takes in an element deposited at an interface between the active material layer and the electrolyte layer.

ELECTROLYTES THAT INCLUDE LITHIUM IODIDE AND BATTERIES THAT INCLUDE SUCH ELECTROLYTES

Resumen de: WO2025081003A1

Presented herein are, infer alia, electrolytes for electrochemical cells, such as lithium sulfur secondary batteries. The electrolytes comprise one or more lithium salts. One or more of the lithium salts is lithium iodide. Lithium iodide is a primary electrolytic salt. Secondary batteries that include the disclosed electrolytes are also disclosed.

SYSTEMS AND METHODS FOR CONTROLLED BATTERY HEATING

Resumen de: WO2025081083A1

Systems and methods for low temperature charging a battery, which may be performed alone or in combination with heating a battery. In some aspects, the low temperature charging method involves obtaining a susceptance response of a battery, and upon a change in the susceptance response of the battery, altering a charge signal to the battery. It is understood that changes in susceptance are correlated with phase changes of a battery electrolyte – e.g., as a battery warms from a low temperature where the electrolyte is partially or completely frozen (solid) to a higher temperature where it changes to a liquid state, there is a change in susceptance. As the electrolyte changes from solid to liquid as understood from a change in the susceptance response, the charge may be increased as the electrolyte thaws.

BATTERY PACK AND STRUCTURE

Resumen de: EP4794074A1

Provided is a battery pack including a mica plate that is resistant to damage and is lightweight. The battery pack of the present invention includes a module with a plurality of battery cells; a case containing the module; and a mica plate disposed between the module and the case and having a first main face and a second main face opposite to the first main face, the battery pack further including an attaching member disposed on a surface of the mica plate to fix the mica plate, an area S1 of the attaching member being not less than 5.8 × 10^-6 times an area S2 of the mica plate in a plan view of the mica plate.

QUALITY CONTROL SYSTEM FOR SECONDARY BATTERY AND QUALITY CONTROL METHOD USING SAME

Resumen de: EP4794017A1

In order to provide a secondary battery quality control system and a secondary battery quality control method that allow performance of a completed secondary battery to be predicted on the basis of structure information of an electrode mixture sheet produced during manufacturing steps, the following configuration is provided. There are provided the quality control system for a secondary battery includes: a storage unit that stores a performance prediction model obtained by formulating correlation between structure information of an electrode mixture sheet and performance information of the secondary battery manufactured by applying the electrode mixture sheet; and a performance prediction unit that inputs the structure information of the newly manufactured electrode mixture sheet to the performance prediction model to predict electrode performance of the secondary battery manufactured by applying the electrode mixture sheet, and the secondary battery quality control method.

SEPARATOR AND ELECTROCHEMICAL DEVICE

Resumen de: EP4794045A1

Provided are a separator (100) and an electrochemical device. The separator (100) includes a porous base film (101) and a heat resistant layer (102). The heat resistant layer (102) is disposed on at least one surface of the porous base film (101), and includes inorganic particles and an adhesive agent. A surface static friction coefficient of the heat resistant layer (102) is ≤0.8, and a bulk density A of the heat resistant layer (102) satisfies: A=(0.4 to 0.5)×ρ. A heat resistant layer (102) with dense stacking and flat surface is obtained by controlling the static friction coefficient and bulk density of the heat resistant layer (102), which may increase an effective contact area between the adhesive particles in the heat resistant layer (102) and the electrode sheet, thereby increasing the adhesive force between the separator (100) as a whole and the electrode sheet.

SEPARATOR AND ELECTROCHEMICAL DEVICE

Resumen de: EP4794101A1

Disclosed are a separator (100) and an electrochemical device, specifically relating to the battery technology field. The separator (100) includes a porous base film (101), a heat-resistant layer (102) and an adhesive layer (103), wherein the heat-resistant layer (102) is disposed on at least one surface of the porous base film (101). The adhesive layer (103) is at least disposed on a surface of the heat-resistant layer (102) opposite to a surface in contact with the porous base film (101). An effective adhesion degree R-value of the separator (100) on a side where the heat-resistant layer (102) is provided is 40%-80%, and a difference between a maximum value and a minimum value of the effective adhesion degree R-value is <30%; wherein the effective adhesion degree R-value indicates a ratio of an effective adhesion area to a theoretical adhesion area of the separator (100).

MANUFACTURING METHOD OF POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, AND LITHIUM SECONDARY BATTERY COMPRISING SAME

Resumen de: EP4793239A1

The present invention relates to a method for manufacturing a positive electrode active material for a lithium secondary battery, the method comprising: preparing a manganese-excess transition metal precursor having a molar ratio (Mn/M) of manganese (Mn) to transition metal (M) of 0.5 to 0.75; oxidizing the transition metal precursor by performing a first calcination; and forming a lithium and manganese-excess lithium transition metal oxide by lithiating the oxidized transition metal precursor through a second calcination.

SOLVENTLESS ELECTRODES

Resumen de: CN122070610A

An electrode for an energy storage device is disclosed, the electrode comprising a solvent-free electrode film. The solventless film includes a porous network of active material joined together by binder particles. The binder particles comprise a high density polyethylene polymer.

BATTERY COMPRISING AT LEAST ONE STACK OF ELECTRICAL CELLS AND ASSOCIATED ELASTIC DEVICE FOR COMPENSATING FOR GAPS

Resumen de: WO2025078776A1

The invention relates to a battery (1) for storing electrical energy, comprising: at least one stack (7) of electrical cells (6); and a housing including a base (3) to which the stack (7) of cells of the battery (1) is attached. The battery (1) comprises: at least two compression plates (8) which are arranged on either side of the stack; means (10) for attaching the compression plates (8) to the base (3); at least one tie rod (12) which is capable of pressing the compression plates (8) against the cells (6) of the stack (7); and at least one elastic device (15) for compensating for gaps in the stack in a direction of dimensional variation of the stack, the device comprising at least one flat-wire wave spring.

BATTERY AND ELECTRIC DEVICE

Resumen de: EP4794078A1

0001 Disclosed are a battery and an electric device. The battery comprises a case; battery cell rows, each comprising a plurality of battery cells arranged in a first direction, wherein the plurality of battery cell rows are stacked in a second direction to form a battery cell array and are placed in the case; and a thermal management part disposed on the sides of the plurality of battery cells in a third direction for heat exchange with the battery cells, wherein the first direction, the second direction, and the third direction are perpendicular to each other.

POSITIVE ELECTRODE ACTIVE MATERIAL, ELECTRODE, AND BATTERY

Resumen de: EP4794020A1

0001 A positive electrode active material includes a secondary particle (2), wherein: the secondary particle (2) includes a first particle group, a second particle group, and a carbon layer (1c); each of the first particle group and the second particle group is composed of primary particles (1); the first particle group has a larger average particle diameter than the second particle group; the primary particles contain an olivine-type compound; the carbon layer (1c) covers at least part of a surface of the primary particle (1) and satisfies a relationship of T < T where T represents an average thickness of the carbon layer (1) on the primary particles (1) belonging to the first particle group; and T represents an average thickness of the carbon layer (1c) on the primary particles (1) belonging to the second particle group.