DE202022106715U1 - Negative collector and battery - Google Patents

Abstract

Negative collector, characterized in that it comprises a disc body (100), an extension section (110) being arranged on the outer edge of the disc body (100), a side of the extension section (110) facing away from the disc body (100) having a bead (120) is arranged, and wherein the flange (120) is used to rest against the outer edge of the eyelet of the electric cell (200), and wherein the extension direction of the extension section (110) and the surface of the disc body (100) enclose an angle with each other.

Description

TECHNICAL AREA

The present utility model relates to the technical field of battery, particularly a negative collector and a battery.

STATE OF THE ART

As a key component in battery assembly, the main function of the negative collector is to make the electrical connection between the electric cell lug and the case, and the structure of the negative collector directly affects the performance of the electrical connection.

With the existing negative collector, the electric cell is pressed with a flat surface to flatten the tab, in which process the tab expands, resulting in a poor fit between the negative collector and the tab.

CONTENT OF PRESENT UTILITY MODEL

The purpose of the present utility model is to provide a negative collector to improve the fit between the negative collector and the eyelet.

The purpose of the present utility model is to provide a battery to improve the fit between the negative collector and the eyelet. A negative collector according to the present utility model comprises a disc body, an extension section being arranged on the outer edge of the disc body, and a flange being arranged on a side of the extension section facing away from the disc body, and the flange being used to attach the electrical Abut cell, and wherein the extension direction of the extension portion and the surface of the disk body enclose an angle with each other.

Optionally, the height of the flare is 0.5-0.6 mm.

Optionally, the angle enclosed by the extension direction of the extension section and the surface of the disc body is 2°-3°.

Optionally, a plurality of stress relief notches are provided on the disk body along the circumferential direction.

Optionally, the width of the stress relief notch is 3.5-4mm, with the depth of the stress relief notch being 10-12mm.

Optionally, a plurality of electrical connection grooves are provided on the disc body along the circumferential direction, each electrical connection groove being electrically connected to the eyelet of the electric cell.

Optionally, multiple rows of welds are arranged in each electrical connection groove, with each row of welds being distributed in an arc.

Optionally, between two adjacent electrical connection grooves, an electrical connection projection is arranged, which is used to fit and be electrically connected to the top cover of the battery.

Optionally, the width of the electrical connection projection is 4-4.5 mm, and the height of the electrical connection projection is 0.4-0.5 mm.

A battery comprising an electric cell, a case, a top cover and a negative collector above, wherein the electric cell is arranged in the case, and wherein the negative collector is arranged at the top of the electric cell, and the top cover at Housing is arranged and electrically connected to the negative collector.

Compared to the prior art, the present utility model has the following advantages: an extension section is arranged on the outer edge of the disc body, with a flange being arranged on the side of the extension section facing away from the disc body, and the flange being in contact with the outer edge of the eyelet of the electric cell in order to to limit the eyelet, which prevents the eyelet from expanding; and an angle is arranged between the extension portion and the disc body, with the arrangement of the angle, cushioning can be provided for the lug to ensure the flatness of the lug, thereby improving the fit between the negative collector and the lug.

character list

• 1 zeigt eine schematische Strukturansicht einer Batterie in einem Ausführungsbeispiel des vorliegenden Gebrauchsmusters.
• 2 zeigt eine schematische Strukturansicht eines negativen Kollektors in einem Ausführungsbeispiel des vorliegenden Gebrauchsmusters.
• 3 zeigt eine schematisches Diagramm eines von dem Erstreckungsabschnitt und der Oberfläche des Scheibenkörpers eingeschlossenen Winkels in einem Ausführungsbeispiel des vorliegenden Gebrauchsmusters.

In order to explain the technical solution in the exemplary embodiments of the present utility model more clearly, the figures to be used in the explanation of the exemplary embodiments are briefly presented below. It goes without saying that the following figures show only a few exemplary embodiments of the present utility model represent, therefore they should not be construed as limiting the scope. Those of ordinary skill in the art can obtain other figures based on the figures without having any creative work.

• 1 Fig. 12 shows a schematic structural view of a battery in an embodiment of the present utility model.
• 2 Fig. 12 shows a schematic structural view of a negative collector in an embodiment of the present utility model.
• 3 Fig. 12 is a schematic diagram of an angle formed by the extension portion and the surface of the disk body in an embodiment of the present utility model.

Reference List

100

disc body

110

extension section

120

flare

130

stress relief notch

140

Electrical connection groove

141

weld

150

Electrical connection tab

160

machining hole

200

electric cell

300

Housing

DETAILED DESCRIPTION

In connection with figures in the embodiments of the present utility model, the technical solution in the embodiment of the present utility model will be explained clearly and completely in the following, so that the purpose, the technical solution and the advantages of the embodiment of the present utility model become clearer. Obviously, the described embodiments do not represent all embodiments, but only a part of the embodiments of the present utility model. The components of the embodiments of the present utility model explained and shown in the figures can normally be arranged and designed in different configurations.

Due to this, the detailed explanation in the exemplary embodiments of the present utility model according to the figures does not serve to limit the scope of protection of the present utility model, but only represents the selected exemplary embodiments of the present utility model based on the embodiments in the present utility model without any creative work should be considered to be within the scope of the present utility model.

It should be noted that similar reference numbers and alphabets do not represent similar elements, so if an element is defined in one figure, there is no need to further define and explain the item in additional figures.

It should be noted that in the explanation of the present utility model, the directional or positional relationships with the technical terms such as "up", "down", "inside", "outside", "left", "right" etc. refer to the in Figures are based on the directional or positional relationships shown, or represent the directional or positional relationships with which the product of the utility model are normally placed, or the directional or positional relationships normally understood by those skilled in the art. They only serve to explain the present utility model and to facilitate the explanation. They do not indicate or imply that the equipment or items depicted have any particular orientation or should be constructed and operated in any particular orientation. Because of this, they cannot be understood as a limitation for the present utility model.

Furthermore, the technical terms "the first", "the second" are only used to explain the goal and they cannot be taken to indicate or imply the relative meaning.

It should be noted that the terms "arranged", "connected" etc. in the explanation of the present utility model should be understood in a broad sense in the absence of clear rules and regulations. For example, it can be both a fixed connection and a removable connection, or it can be an integrated connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through a medium, it can also be a connection between the interiors of two elements. Those of ordinary skill in the art can use the specific situations to determine the specific Understand the meanings of the above terms in the present utility model.

The inventor of the present application found that with the existing negative collector, the electric cell is pressed with a flat surface to flatten the tab, in which process the tab expands, resulting in a poor fit between the negative collector and the tab leads. The present embodiment provides a battery to solve at least the technical problem.

Please refer 1 until 3 , the battery according to the present embodiment comprising an electric cell 200, a case 300, a top cover (not shown) and a negative collector above, wherein the electric cell 200 is arranged in the case 300, and wherein the negative collector at the top of the electric cell 200, and wherein the top cover is placed on the case 300 and electrically connected to the negative collector.

It should be noted that the electric cell 200 is a cylindrical electric cell 200 with the eyelet of the electric cell 200 located at the top of the electric cell 200 and located between the negative collector and the top of the electric cell 200 .

The negative collector comprises a disk body 100, with an extension portion 110 being arranged on the outer edge of the disk body, and a flange 120 being arranged on a side of the extension portion 110 facing away from the disk body 100, and the flange 120 being used on the outer edge of the eyelet of the electric cell 200, and wherein the extension direction of the extension section 110 and the surface of the disc body 100 enclose an angle α with each other.

It should be noted that the disc body 100 is formed into a substantially circular shape, with the bead 120 being oriented vertically to the disc body 100, and the bead 120 extending in the same direction as from the top of the electric cell 200 to the bottom of the electric cell 200 extends. The outer diameter of the disk body 100 is slightly larger than the outer diameter of the electric cell 200, with the bead 120 extending to the side surface of the electric cell 200 and abutting the outer edge of the eyelet to limit the eyelet and prevent the eyelet from expanding. The extension portion 110 is connected between the disc body 100 and the bead 120, with the extension portion 110 being arranged obliquely to the disc body 100 to provide cushioning for the eyelet and ensure the flatness of the eyelet, with the arrangement of the bead 120 and the The angle α included by the extension portion 110 and the disc body 100 provides cushioning and constraint for the eyelet to improve the fitting of the eyelet, thus effectively reducing the risk of sweating.

In an optional embodiment, the height of the bead 120 is 0.5-0.6 mm.

It should be pointed out that the height of the flange 120 refers to the height of the flange 120 in its own direction of extension.

For example, the height of the bead 120 is 0.5mm, 0.55mm or 0.6mm, it being understood that the height of the bead 120 can be determined according to actual situations.

In an optional embodiment, the angle enclosed by the extension direction of the extension section 110 and the surface of the disk body 100 is 2°-3°.

It should be noted that when the negative collector is arranged at the top of the electric cell 200, the surface of the disc body 100 is parallel to the top of the electric cell 200 and the extending direction of the bead 120 is vertical to the surface of the disc body 100.

For example, the included angle α is 2°, 2.5° or 3°, it being understood that the included angle α can be determined according to actual situations.

In an optional embodiment, a plurality of stress relief notches 130 are provided on the disk body 100 along the circumferential direction.

It should be noted that a plurality of stress relief notches 130 are provided at equal intervals along the circumferential direction of the disk body 100, the stress relief notches 130 can reduce the amount of deformation of the disk body 100 during the machining process.

In an optional embodiment, the width of the stress relief notch 130 is 3.5-4 mm, and the depth of the stress relief notch 130 is 10-12 mm.

It should be noted that the stress relief notch 130 is a rectangular notch, the depth direction of the stress relief notch 130 refers to the radial direction of the disk body 100, and the width direction of the stress relief notch 130 refers to a direction perpendicular to the depth direction of the stress relief notch 130 aligned on the same horizontal plane.

For example, the width of the stress relief notch 130 is 3.5mm, 3.7mm, or 4mm and the depth of the stress relief notch 130 is 10mm, 11mm, or 12mm, it being understood that the width of the stress relief notch 130 and the depth of the Stress relief notch 130 can be determined according to actual situations. In an optional embodiment, a plurality of electrical connection grooves 140 are provided on the disk body 100 along the circumferential direction, with each electrical connection groove 140 being electrically connected to the eyelet of the electric cell 200 respectively.

It should be noted that a plurality of sector-shaped portions on the disk body 100 are recessed inward to form a plurality of electrical connection grooves 140, a plurality of electrical connection grooves 140 being provided along the circumferential direction of the disk body 100, and between each electrical connection groove 140 and the electrical Each cell 200 has an eyelet disposed thereon, and each electrical connection groove 140 is electrically connected to the corresponding eyelet, and wherein the electrical connection groove 140 provides an electrical connection point for the eyelet.

In an optional embodiment, the depth of the electrical connection groove 140 is 0.4-0.5 mm, where the depth of the electrical connection groove 140 refers to the depth by which the disk body 100 is recessed inwards.

For example, the depth of the electrical connection groove 140 is 0.4mm, 0.45mm or 0.5mm, it being understood that the depth of the electrical connection groove 140 can be determined according to actual situations.

In an optional embodiment, multiple rows of welds 141 are arranged in each electrical connection groove 140, with each row of welds 141 being arcuately distributed.

By arranging the arc-shaped welds 141 from the inside of the disc body 100 to the outside of the disc body 100, the weld area can be effectively increased to improve the performance of electrical connection between the negative collector and the eyelet.

In an optional embodiment, the diameter of the weld 141 is 0.4-0.6 mm.

For example, the diameter of the weld 141 is 0.4 mm, 0.5 mm or 0.6 mm, it being understood that the diameter of the weld 141 can be determined according to actual situations.

In an optional embodiment, disposed between two adjacent electrical connection grooves 140 is an electrical connection protrusion 150 that is used to mate with and electrically connect to the top cover of the battery.

It should be noted that the electrical connection protrusion 150 protrudes in a direction away from the electrical cell 200 and fits and is electrically connected to the top cover of the battery, thereby increasing the electrical connection area of the disk body 100 and improving the electrical connection performance .

In an optional embodiment, the width of the electrical connection tab 150 is 4-4.5 mm, and the height of the electrical connection tab 150 is 0.4-0.5 mm.

It should be noted that the width direction of the electrical connection protrusion 150 is perpendicular to the radial direction of the disc body 100, and the height of the electrical connection protrusion 150 refers to a height by which it protrudes relative to the surface of the disc body 100.

For example, the width of the electrical connection tab 150 is 4mm, 4.2mm, or 4.5mm, and the height of the electrical connection tab 150 is 0.4mm, 0.45mm, or 0.5mm. It is understood that the width of the electrical connection projection 150 and the depth of the electrical connection projection 150 can be determined according to actual situations.

In an optional embodiment, a machining hole 160 is provided in the center of the disk body 100, the hole diameter of the machining hole 160 being 6-7 mm.

It should be noted that the machining hole 160 on the one hand the function to avoid plays and on the other hand facilitates the welding of the positive collector.

In summary, the present embodiment provides a negative collector and battery that adopts an extension portion 110 and flange 120 design that provides cushioning and constraint for the tab to improve the fit of the tab, the manner the risk of sweating is effectively reduced; moreover, a design with an electrical connection groove 140 and an electrical connection projection 150 is adopted, the collector is not directly welded to the case 300 to reduce the risk that shrinkage of the diaphragm caused by heat generation leads to short circuit of the battery; moreover, using the arc-shaped spot welding method, the number of laser welds 141 can be increased to increase the welding area and effectively improve the performance of the electrical connection between the lug and the negative collector.

The above content is only preferred embodiment of the present utility model and is not intended to limit the present utility model. Various changes and modifications can be made to the present utility model by those skilled in the art. All changes, equivalent substitutions and improvements made under the spirit and principle of the present utility model should be considered to be within the scope of protection of the present utility model.

Claims (10)

Negative collector, characterized in that it comprises a disc body (100), an extension section (110) being arranged on the outer edge of the disc body (100), a side of the extension section (110) facing away from the disc body (100) having a bead (120) is arranged, and wherein the flange (120) is used to rest against the outer edge of the eyelet of the electric cell (200), and wherein the extension direction of the extension section (110) and the surface of the disc body (100) enclose an angle with each other. Negative collector after claim 1 , characterized in that the height of the bead (120) is 0.5-0.6 mm. Negative collector after claim 1 , characterized in that the angle enclosed by the extension direction of the extension section (110) and the surface of the disc body (100) is 2°-3°. Negative collector after claim 1 , characterized in that a plurality of stress relief notches (130) are provided on the disc body (100) along the circumferential direction. Negative collector after claim 4 , characterized in that the width of the stress relief notch (130) is 3.5-4 mm, the depth of the stress relief notch (130) being 10-12 mm. Negative collector after claim 1 , characterized in that on the disc body (100) a plurality of electrical connection grooves (140) are provided along the circumferential direction, each electrical connection groove (140) is electrically connected to the eyelet of the electric cell (200) respectively. Negative collector after claim 6 , characterized in that a plurality of rows of welds (141) are arranged in each electrical connection groove (140), each row of welds (141) being distributed in an arc. Negative collector after claim 6 Characterized in that between two adjacent electrical connection grooves (140) there is disposed an electrical connection projection (150) which is used to fit and be electrically connected to the top cover of the battery. Negative collector after claim 8 , characterized in that the width of the electrical connection projection (150) is 4-4.5 mm, the height of the electrical connection projection (150) being 0.4-0.5 mm. A battery characterized in that it comprises an electric cell (200), a case (300), a top cover and a negative collector according to any one of Claims 1 until 9 comprises wherein the electric cell (200) is arranged in the housing (300), and wherein the negative collector is arranged at the top of the electric cell (200), and wherein the top cover is arranged on the housing (300) and with the negative Collector is electrically connected.

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