CN-122029694-A - Battery monomer, battery and electric equipment

CN122029694ACN 122029694 ACN122029694 ACN 122029694ACN-122029694-A

Abstract

The utility model provides a battery monomer (10), battery (100) and consumer, battery monomer (10) include casing (11), first end cap subassembly (13), electrode subassembly (14) and separator (12), first end cap subassembly (13) are including joint arch (131) and first electrode lead-out piece (17), electrode subassembly (14) are held in casing (11), electrode subassembly (14) are including main part (141) and tab (142), separator (12) set up between first electrode lead-out piece (17) and main part (141), tab (142) pass separator (12) and are connected with first electrode lead-out piece (17) electricity, separator (12) are including spacing arch (123), spacing hole (121) have been seted up on spacing arch (123), be equipped with elastic deformation structure on the pore wall of spacing hole (121), joint arch (131) and elastic deformation structure joint cooperation. The elastic deformation structure comprises a penetrating hole (1231), and the elastic deformation structure is arranged to enable elastic deformation to occur when the clamping protrusion (131) is inserted into the limiting hole (121) and passes through the penetrating hole (1231). Set up elastic deformation structure on isolator (12) for need not to set up deformation structure on joint arch (131) and can satisfy the demand of assembly, reduced the cracked condition of joint arch (131) emergence in the assembly process.

Inventors

CHEN SHENGWANG
HUANG SHAOBIN
GUO ZHIJUN
WANG PENG

Assignees

宁德时代新能源科技股份有限公司

Dates

Publication Date: 20260512
Application Date: 20240712

Claims (20)

A battery cell, the battery cell comprising: a housing including a first opening; a first end cap assembly for covering the first opening, the first end cap assembly including a snap-fit protrusion and a first electrode lead; An electrode assembly accommodated in the case, the electrode assembly including a body portion and a tab extending from the body portion; The isolating piece is at least partially arranged between the first electrode lead-out piece and the main body part, the lug penetrates through the isolating piece and is electrically connected with the first electrode lead-out piece, the isolating piece comprises a limiting protrusion, a limiting hole is formed in the limiting protrusion, the limiting hole is formed in the thickness direction of the isolating piece, an elastic deformation structure is arranged on the wall of the limiting hole, and the clamping protrusion is in clamping fit with the elastic deformation structure; The elastic deformation structure comprises a penetrating hole, the penetrating hole is communicated with the limiting hole, and the elastic deformation structure is arranged to enable elastic deformation to occur when the clamping protrusion is inserted into the limiting hole and passes through the penetrating hole.
The battery cell as defined in claim 1, wherein the elastic deformation structure is a cylindrical structure, the interior of the cylindrical structure forms the through hole, a deformation gap is formed in the cylindrical structure, and a gap is formed between the outer peripheral surface of the elastic deformation structure and the wall of the limiting hole.
The battery cell as recited in claim 2, wherein a gap between an outer peripheral surface of the elastically deformable structure and a wall of the limiting hole is increased in a direction from the first end cap assembly to the main body portion, and/or the cylindrical structure is inclined in a direction from the first end cap assembly to the main body portion.
The battery cell of claim 2 or 3, wherein the snap-fit protrusion includes a limit flange, the cylindrical structure is configured such that a size of the deformation gap is enlarged and a diameter of the penetration hole is increased when the limit flange passes through the penetration hole, and the deformation gap is reset and a diameter of the penetration hole is reset after the limit flange is removed from the penetration hole, and the limit flange is snapped to a side of the elastically deformable structure facing the main body portion.
The battery cell as recited in claim 4, wherein an end of the elastically deformable structure facing the body portion is disposed in spaced relation to the body portion, the limit flange is disposed between the elastically deformable structure and the body portion, and a distance between the limit flange and the body portion is greater than or equal to zero.
The battery cell of any one of claims 1-5, wherein the limiting aperture comprises a first aperture segment and a second aperture segment, the first aperture segment and the second aperture segment being located on opposite sides of the elastically deformable structure, and the first aperture segment being disposed closer to the body portion than the second aperture segment; Wherein the diameter of the first bore section is greater than the diameter of the second bore section.
The battery cell of claim 6, wherein the first hole section transitions to an arc of a circle with the elastically deformable structure.
The battery cell of any one of claims 6-7, wherein the snap-fit protrusion includes a stop flange that snaps onto a side of the elastically deformable structure facing the body portion, the stop flange being fully received in the first bore section.
The battery cell of claim 8, wherein the through-hole includes a straight hole section and a transition hole section, the straight hole section and the transition hole section are connected, and the straight hole section is disposed farther from the first end cap assembly than the transition hole section, one end of the transition hole section is connected to the straight hole section, the other end of the transition hole section is connected to the second hole section, and the size of the transition hole section is in a decreasing trend along the direction from the first end cap assembly to the main body portion.
The battery cell of claim 9, wherein the snap-fit projection further comprises a connecting post through which the limit flange is coupled to the first end cap assembly, at least a portion of the connecting post being received in the through-hole.
The battery cell of claim 10, wherein the connecting post includes a first connecting portion, the first connecting portion being connected to the limit flange, a dimension of the first connecting portion in a first direction being less than or equal to a dimension of the straight hole segment in the first direction, the dimension of the limit flange in the first direction being greater than a dimension of the straight hole segment in the first direction, the first direction being perpendicular to a thickness direction of the separator.
The battery cell of claim 11, wherein the first connection portion has a dimension in the first direction of 0.8 millimeters or more and 3 millimeters or less.
The battery cell of claim 11 or 12, wherein the connection post further comprises a transition connection portion through which the first connection portion is connected to the first end cap assembly, at least a portion of the transition connection portion extending through the transition aperture segment, the first end cap assembly oriented toward the body portion, the transition connection portion having a decreasing dimension in a first direction.
The battery cell of claim 13, wherein the connection post further comprises a second connection portion through which the transitional connection portion is connected to the first end cap assembly, the second connection portion being received within the second bore section.
The battery cell of any one of claims 9-14, wherein a first included angle is formed between the wall of the transition hole section and the central axis of the through hole, a second included angle is formed between the outer peripheral surface of the transition connection portion and the central axis of the connecting column, and the first included angle is less than or equal to the second included angle, wherein the direction of the central axis of the through hole is consistent with the direction of the central axis of the connecting column.
The battery cell of claim 15, wherein the first included angle is 20 degrees or greater and 75 degrees or less; And/or, the second inclination angle is greater than or equal to 20 degrees and less than or equal to 75 degrees.
The battery cell as defined in claim 4 or 8, wherein the limit flange has a decreasing tendency in the thickness direction of the separator.
The battery cell according to any one of claims 2 to 5, wherein the number of the deformation slits is plural, and the plural deformation slits are arranged at intervals in the circumferential direction of the limiting hole.
The battery cell of any one of claims 2 to 5, wherein the deformation gap has a linear structure or a curved structure.
The battery cell according to any one of claims 2 to 5, wherein the size of the deformation gap is 0.3mm or more and 1.5mm or less in the circumferential direction of the limiting hole.

Description

Battery monomer, battery and electric equipment Technical Field The application relates to the technical field of batteries, in particular to a battery monomer, a battery and electric equipment. Background With the development of new energy, more and more fields adopt new energy as power. The battery is widely applied to the fields of new energy automobiles, consumer electronics, energy storage systems and the like due to the advantages of high energy density, recycling charge, safety, environmental protection and the like. Including at least one battery monomer in the battery, the battery monomer includes casing, support and apron, and the support sets up in the casing and is equipped with the draw-in hole, is equipped with the buckle on the apron, and the buckle is protruding piece, has seted up deformation groove on protruding piece to under the condition that deformation groove takes place elastic deformation, protruding piece card goes into the draw-in hole. The deformation grooves may weaken the strength of the protruding member so that the protruding member is easily broken during the assembly process. Disclosure of Invention In view of the above problems, the application provides a battery cell, a battery and electric equipment, which solve the problem that a protruding piece on a cover plate is easy to break in the assembly process. A first aspect of the present application proposes a battery cell comprising: A housing including a first opening; a first end cap assembly for covering the first opening, the first end cap assembly including a snap-fit protrusion and a first electrode lead; An electrode assembly accommodated in the case, the electrode assembly including a body portion and a tab extending from the body portion; The electrode lug penetrates through the separator and is electrically connected with the first electrode lead-out part, the separator comprises a limiting bulge, a limiting hole is formed in the limiting bulge, the limiting hole is formed in the thickness direction of the separator, an elastic deformation structure is arranged on the wall of the limiting hole, and the clamping bulge is matched with the elastic deformation structure in a clamping mode; wherein, elastic deformation structure is including wearing to establish the hole, wears to establish hole and spacing hole intercommunication, and elastic deformation structure is set up to can take place elastic deformation when the joint protruding spacing hole of inserting and wearing to establish the hole. Specifically, when assembling, set up the isolator in the casing, insert spacing bellied spacing downthehole with the joint arch of first end cover subassembly again to along with the bellied gradual insertion of joint, the joint is protruding to enter into the hole of wearing of elastic deformation structure, when the joint arch passed and wears to establish the hole, elastic deformation structure takes place elastic deformation, so that the joint arch can cooperate with elastic deformation structure joint. Set up elastic deformation structure on the separator for need not to set up deformation structure on the joint arch and can satisfy the demand of assembly, thereby can improve the bellied structural strength of joint, reduced the bellied cracked condition of taking place of joint in the assembly process. In some embodiments of the present application, the elastic deformation structure is a cylindrical structure, the interior of the cylindrical structure forms a through hole, the cylindrical structure is provided with a deformation gap, and a gap is arranged between the outer peripheral surface of the elastic deformation structure and the wall of the limit hole. Set up deformation gap for elastic deformation structure has deformation ability, sets up the clearance between the pore wall in elastic deformation structure and spacing hole simultaneously, thereby provides the space of deformation when carrying out elastic deformation for elastic deformation structure, and then effectively satisfies the joint arch and passes the hole demand of wearing of elastic deformation structure, has effectively realized the joint cooperation between joint arch and the elastic deformation structure. In some embodiments of the present application, the gap between the outer peripheral surface of the elastically deformable structure and the wall of the limiting aperture tends to increase in a direction from the first end cap assembly to the main body portion. Through setting up the clearance between the pore wall of elastic deformation structure and spacing hole for elastic deformation structure has sufficient deformation space to satisfy the bellied demand of wearing to establish of joint, thereby effectively realized the joint cooperation of joint arch and elastic deformation structure. In some embodiments of the application, the tubular structure extends obliquely in a direction from the first end cap assembly to the body portion. In the