AESC Japan Ltd.

A secondary battery and an electronic device are provided. The secondary battery includes a housing, an electrode assembly, and a current-collecting plate. The housing includes an end wall configured with an explosion-proof valve thereon. The electrode assembly is accommodated within the housing, with a tab extending from an end of the electrode assembly facing the explosion-proof valve. The current-collecting plate is welded to the tab and includes a first opening and multiple second openings. The first opening passes through the center of the current-collecting plate and extends in a radial direction of the current-collecting plate. The second openings are distributed on both sides of the first opening. A portion between end portions of the second openings close to the first opening and the first opening constitutes a tearable portion of the current-collecting plate.

A battery pack ( 10 ) includes an accommodation body ( 200 ), and a battery module ( 100 ) accommodated in the accommodation body ( 200 ). The battery module ( 100 ) defines a left tapped hole ( 132 ) and a right tapped hole ( 134 ) overlapping at least a portion of the accommodation body ( 200 ).

A positive electrode sheet, methods for designing and evaluating performance of the same, an electrode assembly, and a secondary battery belonging to the technical field of power batteries are provided. The positive electrode sheet includes a positive current collector and a positive active material layer on at least one side of the positive current collector. The positive active material layer satisfies the following relational expression: 0.97(FD+D v50 2 *LT*μ 1/2 /20)≤PD≤FD+D v50 2 *LT*μ 1/2 /20. A new feasible solution for designing a positive electrode sheet is provided. The rationality of positive electrode sheet design and material utilization are improved, a reliable supporting solution for material selection is provided, resources required for electrode sheet verification is saved, and development efficiency is enhanced. The solution is suitable for application in actual processing and design of a secondary battery.

A battery cell, a battery pack, and an electronic device are provided. The battery cell includes a housing, an electrode assembly, and a current collecting plate. A first extension portion of the current collecting plate extends from an outer edge of a main body portion along a radial direction of the main body portion to be in contact with an outer tab. One end of a second extension portion is connected to the main body portion between the two adjacent first extension portions. An outer edge of the second extension portion is formed with an outer edge surface along a circumferential direction. The outer edge surface is projected orthographically along a height direction onto a plane where the outer tab is located that is perpendicular to the height direction to form an outer edge surface projection at least partially overlapping each outer tab between the two adjacent first extension portions.

A fiberizing equipment and a dry film forming equipment are provided. The fiberizing equipment includes a fiberizing mechanism, an infeed mechanism and a cutting screening mechanism. The fiberizing mechanism includes two fiberizing rollers disposed opposite to each other. An infeed gap is formed between the two fiberizing rollers. The infeed gap includes an infeed port and an outfeed port. The infeed mechanism is located above the infeed port. The cutting screening mechanism is located below the outfeed port and includes a stock bin, a shredding component, and a screen. The screen is located below the shredding component.

A high-voltage box and an energy storage container are provided. The high-voltage box includes: multiple electrical components; multiple conductive components, each having a first panel surface including a first region and a second panel surface disposed opposite to each other along a first direction; multiple semiconductor cooling components, each including a cooling end for absorbing heat. Each conductive component is electrically connected with the corresponding electrical component through the first region. The cooling ends are thermally connected with the conductive components through the second panel surfaces. Along the first direction, an orthogonal projection of each cooling end on the corresponding first panel surface at least partially overlaps with of the first region.

A secondary battery, a battery pack, and an electronic device are provided. The secondary battery includes an electrode assembly, a shell, and a current collecting component. The shell accommodates the electrode assembly, and a side of the shell close to an opening includes a rolling groove recessed toward an interior of the shell. The current collecting component is disposed between the rolling groove and the electrode assembly and includes a current collecting body and a connecting sheet connected to the current collecting body. The current collecting body is connected to the electrode assembly. The connecting sheet bends toward a center of the current collecting body and is welded to the rolling groove, thereby forming a first welding mark. The connecting sheet includes a bending portion located between the first welding mark and the current collecting body. A side of the bending portion is provided with a first weak portion.

A battery cell, a battery pack, and an electronic device are provided. The battery cell includes: a housing; an electrode assembly received in the housing, the electrode assembly comprising a winding structure formed by winding a positive electrode sheet, a separator, and a negative electrode sheet; a first negative electrode surface and a second negative electrode surface of a negative electrode current collector of the negative electrode sheet are respectively covered with a first negative electrode active material layer and a second negative electrode active material layer; the negative electrode sheet includes a first position and a second position along a winding direction. A region at a surface of the second negative electrode active material layer that is away from the center hole and located between the first position and the second position is a preset region and is provided with a first insulating layer along the winding direction.

A battery pack, a manual service disconnect thereof, and a battery protection method are provided. The manual service disconnect includes a base assembly and an upper cover assembly. The base assembly includes a base body, two first high-voltage terminals that are insulated and fixed on the base body, and two second high-voltage terminals that are insulated and fixed on the base body. The upper cover assembly includes an upper cover body and two third high-voltage terminals fixed on the upper cover body and corresponding to the two first high-voltage terminals, and two fourth high-voltage terminals fixed on the upper cover body and corresponding to the two second high-voltage terminals. The two third high-voltage terminals are electrically connected, and the two fourth high-voltage terminals are electrically connected.

The disclosure belongs to the field of battery technology and specifically relates to a battery cover plate and a secondary battery including: a cover plate body provided with an electrode terminal hole; and an electrode terminal assembly including an electrode terminal body and a limiting piece. The electrode terminal body is inserted into the electrode terminal hole. The limiting piece is engaged with the electrode terminal body in a thickness direction of the electrode terminal body to fix the limiting piece made of a first material. A portion of the electrode terminal body engaged with the limiting piece is made of a first conductive material. A hardness of the first material is greater than a hardness of the first conductive material. In the disclosure, the limiting piece made of a high-hardness material is engaged in the thickness direction of the electrode terminal body.