Abstract: The disclosure relates to the technical field of batteries, and a cylindrical battery is provided, including a wound core, and the wound core includes: a wound core body; a first tab portion, which extends from one side of the wound core body, the wound core body is formed with a wound core hole, the first tab portion includes a first tab set and a second tab set adjacent to each other, the first tab set includes at least two first tabs, and the second tab set includes a second tab; a first gap is formed between adjacent first tabs, and the orthographic projections of the second tab and the first gap on the same plane at least partially overlap each other along the radial direction of the wound core hole.

Abstract: The disclosure relates to the technical field of batteries, and a cylindrical battery is provided, including: a single cell housing structure; a core, which is arranged in the single cell housing structure, and the core includes a core body, a first tab and a second tab, and the first tab and the second tab arranged at intervals extend out from the same end of the core body, and the core body is formed with a winding center; the first tab and the second tab are arranged along the circumferential direction of the winding center, and the length of the first tab is greater than the length of the second tab along the radial direction of the winding center. A certain distance may be set between the first tab and the second tab on basis that the first tab and the second tab are able to have sufficient current-passing capability.

Abstract: The disclosure relates to the technical field of batteries and provides a cylindrical battery including a winding cell. The winding cell includes a winding cell body and a first tab extending from one side of the winding cell body. The winding cell body is wound to form a central hole. In a radial direction of the central hole, the first tab includes a plurality of single tabs, and the plurality of single tabs form a first region. Herein, heights of the plurality of single tabs in the first region gradually increase. A difference value between a maximum height difference value and a minimum height difference value between adjacent single tabs in the radial direction of the central hole is less than or equal to 0.5 mm. The height of each of the single tabs is a dimension of the single tab in a lead-out direction thereof.

Abstract: The disclosure relates to the technical field of batteries and provides a cylindrical battery including a winding cell. One end of the winding cell is provided with a first tab and a center of the winding cell is formed with a central hole. The first tab includes a first tab layer and a second tab layer disposed adjacent to each other, the first tab layer includes a first single tab, the second tab layer includes at least two second single tabs, a number of the second single tabs of the second tab layer is one more than a number of the first single tab of the first tab layer.

Abstract: The disclosure relates to the technical field of batteries, and a battery is provided, including a housing; a cell, which is disposed in the housing, and includes a main body and a first tab, and the first tab is led out from one end of the main body; a first insulator, which is disposed in the housing; a first current collector, which is integrally formed in the first insulator, and is connected to the first tab; the largest circumferential outer edge of the orthographic projection of the first current collector facing an end surface of the main body is located inside the largest circumferential outer edge of the orthographic projection of the first insulator facing an end surface of the main body.

Abstract: A cylindrical battery includes a battery housing; a cell, which is arranged in the battery housing, and includes a cell body and a tab portion, and the tab portion is extended from at least one side of the cell body; a first insulating film, which is arranged on the outer surface of the cell body, and is connected with the cell; a second insulating film, which is arranged on the outer surface of the cell body, the second insulating film covers and is connected with the first insulating film. One end of the second insulating film is not lower than an end surface of the cell body provided with the tab portion, and the other end of the second insulating film overlaps the first insulating film so that a portion of the second insulating film overlaps the first insulating film.

Abstract: A battery and a manufacturing method for the same are provided. The battery includes a battery casing, a cell and a connecting member, the battery casing includes a casing member and a cover plate. The casing member and the cover plate are connected to form an accommodation space. The cell is arranged in the accommodation space of the battery casing. The casing member is provided with a position-limiting portion for limiting a position of the connecting member. The connecting member is engaged with the position-limiting portion, and the casing member, the cover plate, and the connecting member are welded. By setting a position-limiting portion at a predetermined distance from the opening of the casing member, the position-limiting portion is used to limit the position of the connecting member.

Abstract: A battery includes a battery casing, a first cell, and a second cell. A partition structure is arranged in the battery casing. The first cell is arranged in the battery casing, and at least a part of the first cell is located on a first side of the partition structure. The second cell is arranged in the battery casing, and at least a part of the second cell is located on a second side of the partition structure, and the first side and the second side are oppositely arranged, such that the first cell and the second cell are arranged in a first direction. The partition structure is formed with a communication channel penetrating the first side and the second side.

Abstract: A battery includes a battery casing and a cell. The battery casing is provided with a liquid injection hole, and the cell is disposed in the battery casing. The cell includes a cell body and a tab portion. The tab portion extends from a side surface of the cell body, the liquid injection hole is located on a side of the cell body adjacent to the tab portion, and the liquid injection hole is disposed on a surface of the battery casing opposite to a larger surface of the tab portion. In a direction perpendicular to an extending direction of the cell body and the tab portion, a minimum vertical distance between the liquid injection hole and the tab portion is a, and a width of the cell body is b, where 5?b/a?20.

Abstract: A battery and a battery manufacturing method are provided. The battery includes a battery casing, a cell, a first insulating film, and a second insulating film. The cell is disposed in the battery casing and includes a cell body and a tab portion, and the tab portion extends from a side surface of the cell body. The first insulating film covers at least a portion of the cell body. The second insulating film is independent from the first insulating film. The second insulating film covers an upper surface of the first insulating film and covers at least a portion of the tab portion, and the first insulating film is located between the cell body and the second insulating film.

Abstract: A battery includes a first casing. The first casing includes a first metal piece and a second metal piece disposed inside the first metal piece, such that the first metal piece forms an outer surface of the first casing and the second metal piece forms an inner surface of the first casing. A material of the first metal piece is inconsistent with a material of the second metal piece. A corrosion potential of the second metal piece is higher than a corrosion potential of the first metal piece, and the corrosion potential of the second metal piece is higher than a negative electrode potential of the battery.

Abstract: A battery connecting member, a battery, and a battery manufacturing method are provided. The battery connecting member is configured to be electrically connected to a cell and a battery casing, and the battery connecting member includes a first connecting portion, a second connecting portion, and a buffering portion. The first connecting portion is configured to be electrically connected to the cell, and the second connecting portion is configured to be electrically connected to the battery casing. Two ends of the buffering portion are respectively connected to the first connecting portion and the second connecting portion. An included angle is provided between the first connecting portion and the second connecting portion, such that a surface of the second connecting portion for electrical connection to the battery casing is inclined to a surface of the first connecting portion for electrical connection to the cell.

Abstract: A battery includes an explosion-proof valve and a battery casing. The explosion-proof valve is arranged in the battery casing. The explosion-proof valve is arranged on a first surface of the battery casing, the explosion-proof valve includes a fragile portion. The fragile portion protrudes toward a middle region of the first surface. The fragile portion includes a first end point and a second end point, and an area jointly enclosed by a connection line between the first end point and the second end point and the fragile portion between the first end point and the second end point is a. A minimum distance between the first end point and a circumferential edge of the first surface is b. A minimum distance between the second end point and the circumferential edge of the first surface is c.

Abstract: A battery includes an explosion-proof valve and a battery casing. The explosion-proof valve is arranged in the battery casing. The explosion-proof valve includes a first straight line segment, a second straight line segment and a circular arc segment. Two ends of the circular arc segment are respectively connected to the first straight line segment and the second straight line segment. Lengths of the first straight line segment and the second straight line segment are respectively a and b, and an arc length of the circular arc segment is c, a radius of curvature of the circular arc segment is r, and 0.8?a/b?1.2 and 0.5?c/r?2.7 are satisfied.

Abstract: A battery includes a battery casing and an explosion-proof valve. The battery casing includes a first casing member and a second casing member, and the first casing member and the second casing member are welded to form a welded connection region between the first casing member and the second casing member. The welded connection region includes a first region, a second region, and a corner region, and two ends of the corner region are respectively connected to the first region and the second region. The explosion-proof valve is disposed at a corner position of a surface of the first casing member and adjacent to the welded connection region.

Abstract: A method for preparing an amorphous silicon powder for an anode material of a lithium-ion battery is disclosed. The amorphous silicon powder is prepared by reducing an oxide of silicon, wherein an X-ray diffraction peak of an amorphous silicon material is weak, and the amorphous silicon material is of an amorphous structure. A structural formula of the oxide of silicon is SiOx, wherein 0<x?2. The reduction refers to vapor phase reduction, a vapor phase reduction atmosphere is a mixed gas of hydrogen and carbon monoxide, a reduction temperature ranges from 100° C. to 700° C., and a reduction time ranges from 2 h to 72 h.

Abstract: A battery pack includes an insulating support, a liquid cooling tube, and at least two batteries. The insulating support includes a heat insulating portion. The heat insulating portion is located between adjacent two of the batteries. At least a part of an outer periphery of each battery is accommodated in the heat insulating portion. At least a part of the outer periphery of each battery exposed to an outside of the heat insulating portion is in contact with the liquid cooling tube.

Abstract: A liquid cooling device and a battery pack are provided. The liquid cooling device includes a plurality of liquid cooling units connected in parallel. Each of the liquid cooling units includes at least one liquid cooling pipe, the liquid cooling pipe in at least one of the liquid cooling units is multiple in number, and the plurality of the liquid cooling pipes are connected in series. An accommodation space for accommodating batteries is formed between adjacent two of the liquid cooling pipes.

Abstract: A battery apparatus includes a liquid cooling member and at least two batteries arranged in a stack. The at least two batteries are located on a same side of the liquid cooling member, and the liquid cooling member is provided with a protrusion. The protrusion communicates with the liquid cooling member. The protrusion is located between the liquid cooling member and the at least two batteries, and the protrusion at least cools the at least two batteries simultaneously.

Abstract: A battery and a battery apparatus are provided. The battery pack includes a cover plate, an explosion-proof valve, and a protective patch. The explosion-proof valve is arranged on the cover plate. The protective patch is arranged on an outer side of the cover plate. A sealed chamber is formed between the explosion-proof valve and the protective patch, and a notch penetrating through the protective patch is arranged on the protective patch in a thickness direction, such that when a predetermined pressure is applied, the sealed chamber communicates with an outside through the notch. The notch has a total length of a and the protective patch has a thickness of b, where 5?a/b?100 and 0.01 mm?b?1.2 mm, and the protective patch has a tensile strength of c, where c/b=xb?1.073.