DE-202021004627-U1 - Battery cell, battery, power-consuming device and device for manufacturing a battery cell

DE202021004627U1DE 202021004627 U1DE202021004627 U1DE 202021004627U1DE-202021004627-U1

Abstract

Battery cell, characterized in that it comprises the following: an electrode arrangement that has electrode tabs; a housing body having an opening, wherein the housing body is used to accommodate the electrode arrangement; an end cap that is used to cover the opening and is sealed to the housing body; a collector component which is accommodated within the housing body and is located on one side of the electrode assembly facing the end cap, wherein the collector component is used to connect the electrode tab to the housing body in order to establish an electrical connection between the electrode tab and the housing body; wherein a first limiting section is provided projecting on an inner side surface of the housing body, wherein the first limiting section is used to limit movement of the end cap in a direction facing the electrode arrangement; wherein the collector component rests against a side of the first limiting section facing the electrode arrangement.

Assignees

CONTEMPORARY AMPEREX TECHNOLOGY HONG KONG LTD

Dates

Publication Date: 20260513
Application Date: 20211020
Priority Date: 20211020

Claims (20)

A battery cell characterized in that it comprises: an electrode arrangement having electrode tabs; a housing body having an opening, the housing body being used to receive the electrode arrangement; an end cap being used to cover the opening and being sealed to the housing body; a collector component being received within the housing body and located on a side of the electrode arrangement facing the end cap, the collector component being used to connect the electrode tab to the housing body to establish an electrical connection between the electrode tab and the housing body; wherein a first limiting section is provided projecting on an inner side surface of the housing body, the first limiting section being used to prevent movement of the to limit the end cap in a direction facing the electrode arrangement; wherein the collector component rests against a side of the first limiting section facing the electrode arrangement.
Battery cell after Claim 1 , characterized in that the collector component comprises: a main body section located on the side of the first boundary section facing the electrode arrangement, wherein the main body section is used for connection with the electrode tab; an elastic section connected to the main body section, wherein the elastic section is used to bear against the first boundary section in a direction away from the electrode arrangement.
Battery cell after Claim 2 , characterized in that the elastic section is a spring plate which is bent and arranged on the main body section.
Battery cell after Claim 2 or 3 , characterized in that the elastic section comprises: a first curved section used to abut the first boundary section; a second curved section used to connect the first curved section to the main body section; wherein, in a thickness direction of the end cap, a portion of the main body section opposite the first curved section is spaced away from the first curved section.
Battery cell after Claim 4 , characterized in that the battery cell further comprises an elastic layer, wherein the elastic layer is supported between the main body section and the first curved section.
Battery cell after Claim 4 or 5 , characterized in that the second bent section is connected to an edge of the main body section, wherein the first bent section is arranged such that it bends relative to the second bent section in a direction facing the main body section.
Battery cell after one of the Claims 2 until 6 , characterized in that the main body section has an outer surface facing the end cap, wherein the outer surface is provided with a first receiving section, wherein the first receiving section is used to receive at least a part of the elastic section.
Battery cell after Claim 7 , characterized in that the elastic section has a contact surface facing the end cap, wherein the contact surface is used to contact the first boundary section, the contact surface being flush with the outer surface.
Battery cell after Claim 7 or 8 , characterized in that the main body section is provided with a through-hole in an area with the first receiving section.
Battery cell after one of the Claims 2 until 9 , characterized in that the main body section is provided with several elastic sections which are distributed at intervals in a circumferential direction of the main body section.
Battery cell after Claim 10 , characterized in that the main body section has several welding areas distributed at intervals in a circumferential direction, wherein the welding areas are used for welding to the electrode tab, wherein at least one elastic section is provided between adjacent welding areas in the circumferential direction of the main body section.
Battery cell after Claim 11 , characterized in that the main body section has an inner surface facing away from the end cap, wherein the inner surface is provided with a second receiving section located within the welding area, wherein the second receiving section is used to receive at least a part of the electrode tab.
Battery cell after Claim 1 , characterized in that the collector component comprises: a main body section located on the side of the first boundary section facing the electrode arrangement, wherein the main body section is used for connection with the electrode tab; a snap-in section connected to the main body section, wherein the snap-in section is used to snap into the first boundary section in order to limit movement of the main body section in a direction towards or away from the end cap.
Battery cell after Claim 13 , characterized in that the snap-in section comprises the following: a first connecting section that is connected to the main body section, wherein the first connecting section is used to abut the side of the first boundary section facing the electrode arrangement; a second connecting section that is used to abut a side of the first boundary section facing away from the electrode arrangement; a third connecting section that is used to connect the first connecting section and the second connecting section.
Battery cell after Claim 14 , characterized in that the first connecting section, the third connecting section and the second connecting section are connected one after the other and together define a boundary groove, wherein the boundary groove is used to accommodate at least a part of the first boundary section.
Battery cell after Claim 15 , characterized in that the battery cell further comprises: a conductive layer, wherein the conductive layer is used to connect the first boundary section and the third connecting section.
Battery cell after one of the Claims 1 until 16 , characterized in that the first boundary section is an annular structure extending in a circumferential direction of the housing body.
Battery cell after one of the Claims 1 until 17 , characterized in that a roller groove is provided at a position on an outer side surface of the housing body that corresponds to the first boundary section.
Battery cell after one of the Claims 1 until 18 , characterized in that the housing body has a second limiting section, wherein at least a part of the end cap is located between the first limiting section and the second limiting section in a thickness direction of the end cap; wherein the first limiting section and the second limiting section are used to jointly limit a movement of the end cap in the thickness direction of the end cap.
Battery cell after one of the Claims 1 until 19 , characterized in that the battery cell further comprises: a sealing element used to seal the end cap and the housing body, wherein the sealing element is located on the side of the first boundary section facing away from the electrode arrangement.

Description

TECHNICAL AREA The present application relates to the technical field of batteries, in particular a battery cell, a battery, a power-consuming device and a device for manufacturing a battery cell. STATE OF THE ART Vehicles mainly use lithium-ion batteries, which are rechargeable and have advantages such as compact size, high energy density, high power density, long cycle life and long storage life. A single battery cell typically comprises a casing and an electrode assembly. The casing houses the electrode assembly and the electrolyte solution, with electrical energy being generated by the movement of metal ions (such as lithium ions) between the cathode and anode foils. In conventional battery cells, the electrode assembly must be electrically connected to the casing so that the casing can function as an output cathode or anode for the battery cell. Currently, the electrical connection between the electrode assembly and the casing is prone to failure. CONTENT OF THE PRESENT INVENTION Exemplary embodiments of the present application provide a battery cell, a battery, a power-consuming device, a method and a device for manufacturing a battery cell, which can reduce the risk of failure of the electrical connection between an arrangement of the battery and a housing body. According to a first aspect, embodiments of the present application provide a battery cell comprising the following: an electrode assembly having electrode tabs; a housing body having an opening, the housing body being used to receive the electrode assembly; an end cap being used to cover the opening and being sealed to the housing body; a collector component being received within the housing body and located on a side of the electrode assembly facing the end cap, the collector component being used to connect the electrode tab to the housing body to establish an electrical connection between the electrode tab and the housing body; a first limiting section being provided projecting on an inner side surface of the housing body, the first limiting section being used to limit movement of the end cap in a direction facing the electrode assembly; and the collector component bearing against a side of the first limiting section facing the electrode assembly. In the above technical solution, an electrical connection between the electrode tab and the housing body is established by the collector component. The collector component rests against the side of the first limiting section facing the electrode assembly, ensuring efficient current flow between the collector component and the housing body. The first limiting section confines not only the end cap but also the collector component. This limits the movement of the electrode assembly within the housing body in the direction of the end cap and minimizes the risk of failure of the connection between the electrode tab and the collector component due to excessive displacement. Consequently, the risk of failure of the electrical connection between the battery assembly and the housing body is reduced. In some embodiments, the collector component comprises the following: a main body section located on the side of the first boundary section facing the electrode assembly, wherein the main body section is used to connect to the electrode tab; an elastic section connected to the main body section, wherein the elastic section is used to bear against the first boundary section in a direction away from the electrode assembly. In the above technical solution, the elastic section rests against the first boundary section in a direction opposite the electrode assembly. The elastic section possesses elastic deformation capability. It can deform elastically in response to changes in the distance between the main body section and the first boundary section. This allows the elastic section to provide effective damping for the electrode assembly, thereby reducing the risk of damage from a rigid impact between the electrode assembly and the collector component. Furthermore, The elastic section remains in a contact state, constantly pressed against the first limiting section, during any movement of the battery assembly within the housing caused by vibrations of the individual battery cells. This reduces the risk of electrical connection failure between the collector component and the housing due to vibrations of the individual battery cells. In some embodiments, the elastic section is a spring plate that is bent and arranged on the main body section. In the above technical solution, the elastic section is a spring plate that is bent and attached to the main body section. This structure is simple, easy to shape, and has good deformability. In some embodiments, the elastic section comprises: a first curved section used to abut the first boundary section; a second curved section used to connect the first curved section to the main body section; wherein, in a thickness direction of the end cap, a portion of the main body section