CN217239701U - Electrode pole, battery cover plate, power battery pack and power device - Google Patents

Abstract

The application discloses electrode utmost point post, battery apron, power battery package and power device. The electrode post is used for the battery cover, the electrode post includes: a substrate; the connecting part is arranged on the substrate and is used for penetrating through the cover plate of the battery cover; the connecting piece is connected to one side, deviating from the substrate, of the connecting part, and a hollow space is formed by the connecting piece and the connecting part in a surrounding mode. In the electrode post of this application embodiment, the connection piece with connecting portion enclose to become to have the fretwork space for the connection piece turns over to the fretwork space outside easily, thereby makes the electrode post can install on the apron of battery cover steadily, is favorable to improving the stability of battery cover.

Description

Electrode pole, battery cover plate, power battery pack and power device

Technical Field

The application relates to the technical field of automobiles, in particular to an electrode pole, a battery cover plate, a power battery pack and a power device.

Background

With the increasing maturity of lithium ion battery technology, lithium ion batteries are widely used in the field of electric vehicles as power batteries. The structural part of the lithium ion battery is also an important component part of the lithium ion power battery, and not only can the safety and reliability of the lithium ion battery be guaranteed, but also the connection between a chemical system inside the lithium ion battery and an external module can be considered. The battery cover of the lithium ion battery is used as an important part of the lithium ion battery, and therefore, how to ensure the stability of the battery cover becomes a technical problem to be solved.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides an electrode pole, a battery cover plate, a power battery pack and a power device.

The electrode post of the embodiment of the present application is used for a battery cover, the electrode post includes:

a substrate;

the connecting part is arranged on the substrate and is used for penetrating through the cover plate of the battery cover;

the connecting piece is connected to one side, deviating from the substrate, of the connecting part, and a hollow space is formed by the connecting piece and the connecting part in a surrounding mode.

In the electrode post of this application embodiment, the connection piece with connecting portion enclose to become to have the fretwork space for the connection piece turns over to the fretwork space outside easily, thereby makes the electrode post can install on the apron of battery cover steadily, is favorable to improving the stability of battery cover.

In some embodiments, a projection of the substrate in the substrate thickness direction covers a projection of the connection portion in the substrate thickness direction.

In some embodiments, the connecting piece is connected to the edge of the connecting part, and the surface of the connecting piece, which faces away from the hollowed-out space, is flush with the peripheral surface of the connecting part.

In some embodiments, the tab has a thickness in a range of 1mm to 5mm in a direction perpendicular to the substrate to the tab.

In some embodiments, the connecting piece has a distance ranging from 1mm to 10mm from one end of the connecting portion to the other end away from the connecting portion.

In some embodiments, the connecting piece is formed with a plurality of notches, the notches penetrate through the connecting piece along a direction perpendicular to the direction from the substrate to the connecting piece, the notches are arranged at intervals along the circumferential direction of the connecting part, and the notches penetrate through one end, away from the connecting part, of the connecting piece.

A battery cover, comprising:

a cover plate; and

in the electrode post of any one of the above embodiments, the substrate abuts against the first surface of the cover plate, the connecting portion penetrates through the cover plate, and the connecting piece can be folded outwards in the hollow space.

In some embodiments, the battery cover includes a first insulating member disposed between the substrate and the cover plate for spacing the cover plate from the substrate; and/or the presence of a gas in the gas,

the battery cover comprises a second insulating piece, the second insulating piece is sleeved on the connecting portion, and the connecting piece abuts against the second insulating piece under the condition that the connecting piece is turned outwards towards the hollow space.

A power battery comprises the battery cover of the above embodiment.

A power device comprises the power battery of the above embodiment.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic perspective view of an electrode post according to one embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of an electrode post according to one embodiment of the present application;

FIG. 3 is a schematic perspective view of one of the states of a battery cover of one of the embodiments of the present application;

FIG. 4 is a cross-sectional schematic view of one of the states of a battery cover of one of the embodiments of the present application.

FIG. 5 is a schematic perspective view of another state of a battery cover according to one embodiment of the present application;

fig. 6 is a schematic cross-sectional view of another state of a battery cover according to one embodiment of the present application.

Fig. 7 is a schematic partial cross-sectional view of a battery cover according to one embodiment of the present application.

Fig. 8 is a perspective view schematically illustrating an electrode post according to another embodiment of the present application;

FIG. 9 is a schematic perspective view of a battery cover according to another embodiment of the present application in one of its states;

fig. 10 is a schematic cross-sectional view of a battery cover according to another embodiment of the present application in one of its states.

Fig. 11 is a perspective view illustrating another state of a battery cover according to another embodiment of the present application;

fig. 12 is a cross-sectional view schematically illustrating another state of a battery cover according to another embodiment of the present application.

FIG. 13 is a schematic plan view of a power plant according to an embodiment of the present application;

description of the main element symbols:

the electrode post 10, the substrate 11, the connecting part 12, the connecting sheet 13, the notch 131 and the hollow space 14.

The explosion-proof battery comprises a battery cover 100, a cover plate 110, a through hole 112, a first insulating member 120, a second insulating member 130, an explosion-proof valve 140, a power device 1000, a power battery 300 and a main body 400.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; may be mechanically, electrically or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

Referring to fig. 1 to 3, an electrode post 10 according to an embodiment of the present disclosure is used in a battery cover 100, and the electrode post 10 includes a substrate 11, a connection part 12, and a connection tab 13, wherein the connection part 12 is disposed on the substrate 11. The connecting portion 12 is disposed through the cover plate 110 of the battery cover 100. The connecting sheet 13 is connected to the side of the connecting portion 12 away from the substrate 11, and the connecting sheet 13 and the connecting portion 12 enclose a hollow space 14.

In the electrode post 10 of the embodiment of the present application, the connecting sheet 13 and the connecting portion 12 enclose the hollowed-out space 14, so that the connecting sheet 13 is easily folded outside the hollowed-out space 14, and the electrode post 10 can be stably mounted on the cover plate 110 of the battery cover 100, which is beneficial to improving the stability of the battery cover 100.

Specifically, the electrode post 10 is made of a conductive material such as a metal material, so that the electrode post 10 has good conductivity. The battery cover 100 is a part of the structure of the power battery 300 (as shown in fig. 13), or the power battery 300 includes the battery cover 100.

Referring to fig. 4-7, the battery cover 100 may include a cover plate 110 and an electrode post 10, the substrate 11 abuts against a first surface of the cover plate 110, the connecting portion 12 penetrates through the cover plate 110, and the connecting piece 13 can be folded toward the hollow space 14.

The substrate 11 of the electrode post 10 is a flat sheet, which may have a square or circular structure. The substrate 11 is made of a conductive material. The substrate 11 is intended to be located inside the power cell 300. The connection portion 12 extends from the surface of the substrate 11. The connecting portion 12 has a substantially columnar shape, for example, the connecting portion 12 may have a columnar shape or a square columnar shape, and the specific shape of the connecting portion 12 is not limited in the present application.

The connecting portion 12 is also made of a conductive material, for example, the material of the connecting portion 12 is copper alloy. The connecting piece 13 is substantially annular and is disposed around the center of the connecting portion 12. The top surface of the connecting portion 12 and the inner surface of the connecting piece 13 enclose a hollow space 14, in other words, the connecting piece 13 is a hollow structure, so that the connecting piece 13 is easily deformed. When the connecting piece 13 is folded, the connecting portion between the connecting piece 13 and the connecting portion 12 serves as a folding boundary, and the connecting piece 13 is folded with the folding boundary as a reference.

As shown in fig. 4, 6 and 7, in one example, in the assembly process of the battery cover 100, the electrode post 10 may be first inserted into the cover plate 110, and then the connecting plate 13 may be flanged outward by using a riveting process, so that the electrode post 10 is riveted and fixed to the cover plate 110. After the electrode post 10 is riveted, the electrode post 10 can form a plane for welding by a mold, and the whole structure is fixed.

It is noted that, in the case where the battery cover 100 includes two electrode posts 10, one of the electrode posts 10 may serve as a negative electrode post 10, and the other electrode post 10 may serve as a positive electrode post 10.

Referring again to fig. 1 and 2, in some embodiments, the projection of the substrate 11 in the thickness direction of the substrate 11 covers the projection of the connection portion 12 in the thickness direction of the substrate 11. Or, the outer contour area of the substrate 11 is larger than the outer contour area of the connecting portion 12, so that after the connecting portion 12 is inserted into the cover plate 110, the substrate 11 can abut against one side of the cover plate 110, and has a limiting effect.

Referring to fig. 1 and 2 again, in some embodiments, the connecting piece 13 is connected to an edge of the connecting portion 12, and a surface of the connecting piece 13 facing away from the hollow space 14 is flush with a circumferential surface of the connecting portion 12. Thus, the connection structure between the connection piece 13 and the connection portion 12 is simple, and the electrode post 10 is more easily manufactured and molded. For example, a solid cylinder may be used, and then a portion of the material of the solid cylinder is removed, thereby forming the connecting portion 12 and the connecting piece 13.

Referring to fig. 2, in some embodiments, the tab 13 has a thickness L in the range of 1mm to 5mm in a direction perpendicular to the substrate 11 to the tab 13. For example, the thickness of the connecting piece 13 is 1mm, 2mm, 3mm, 4mm, 5mm, or the like, so that the connecting piece 13 can be flanged outward normally.

In some embodiments, the connecting tab 13 is spaced from one end of the connecting portion 12 to the other end away from the connecting portion 12 by a distance in the range of 1mm to 10 mm. Alternatively, the height H of the connecting piece 13 is in the range of 1mm to 10 mm. For example, the height of the connecting piece 13 may be 1mm, 2mm, 5mm, 10mm, etc. so that the connecting piece 13 has a large enough area after flanging to ensure the subsequent welding process.

Referring to fig. 8, in some embodiments, the connecting plate 13 is formed with a plurality of notches 131, the notches 131 penetrate the connecting plate 13 in a direction perpendicular to the substrate 11 to the connecting plate 13, the notches 131 are spaced apart along the circumference of the connecting portion 12, and the notches 131 penetrate one end of the connecting plate 13 away from the connecting portion 12.

Thus, as shown in fig. 9-12, the notch 131 can reduce the overall strength of the connecting plate 13, so that the pole piece can be turned over more easily, and the pole post 10 is not easily damaged in the riveting process.

Referring to fig. 7, in some embodiments, the battery cover 100 includes a first insulating member 120, the first insulating member 120 being disposed between the substrate 11 and the cover plate 110 for separating the cover plate 110 from the substrate 11; and/or the presence of a gas in the gas,

the battery cover 100 includes a second insulating member 130, the second insulating member 130 is sleeved on the connecting portion 12, and the connecting portion 13 presses against the second insulating member 130 when the connecting portion 13 is folded toward the hollow space 14.

Or, the battery cover 100 may include at least one of the first insulating member 120 and the second insulating member 130. In this way, the first insulating member 120 prevents electrical connection between the substrate 11 and the cell cover 100, and thus, provides insulation between the electrode post 10 and the cell cover 100. The first insulating member 120 may be made of rubber, such as fluororubber. The second insulator 130 prevents the electrical connection between the connection tab 13 and the battery cover 100, and provides insulation between the electrode post 10 and the battery cover 100. The second insulating member 130 may be made of rubber, such as fluororubber.

Specifically, the cover plate 110 may be made of aluminum metal to have light weight and satisfactory strength. The cap plate 110 is provided with a through hole 112, the connection part 12 is penetrated through the through hole 112, and the first insulator 120 is also partially disposed in the through hole 112 to space the connection part 12 and the cap plate 110 apart, thereby preventing the connection part 12 from being electrically connected with the cap plate 110.

It should be noted that, when the connecting sheet 13 is folded outwards towards the hollow space 14, the first insulating member 120 and the second insulating member 130 can be compressed, so as to ensure the connection reliability of the electrode post 10.

Referring to fig. 6, in some embodiments, the battery cover 100 further includes an explosion-proof valve 140, and the explosion-proof valve 140 is disposed on the cover plate 110. The explosion-proof valve 140 can realize, prevent water, maintain the balance of the air pressure inside and outside the battery pack, and prevent explosion. During the charging and discharging processes of the power battery 300, the temperature of the power battery 300 changes, so that the air pressure in the power battery 300 changes, and the explosion-proof valve 140 can ventilate and does not leak water, so that the air pressure in the power battery 300 can be kept the same as the air pressure in the outside. In addition, once thermal runaway of the power battery 300 occurs, the air pressure in the power battery 300 rises rapidly, and at this time, the power battery 300 has a risk of explosion, so the explosion-proof valve 140 becomes a sudden opening, can relieve pressure in time, and prevents the power battery 300 from exploding

Referring to fig. 13, a power plant 1000 according to an embodiment of the present disclosure includes a power battery 300 according to the above embodiment. The power plant 1000 may be a vehicle, aircraft, or the like that employs the power cell 300, and the application is not limited to a particular type of power plant 1000.

Specifically, the power device 1000 may further include a main body 400, and the power battery 300 is mounted on the main body 400. In the case where power plant 1000 is a vehicle, body 400 may be the frame of the vehicle.

In the description herein, references to the description of the terms "one embodiment," "certain embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: numerous changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. An electrode post for a battery cover, the electrode post comprising:

a substrate;

the connecting part is arranged on the substrate and is used for penetrating through the cover plate of the battery cover;

the connecting piece is connected to one side, deviating from the substrate, of the connecting part, and a hollow space is formed by the connecting piece and the connecting part in a surrounding mode.

2. The electrode post according to claim 1, wherein a projection of the substrate in the substrate thickness direction covers a projection of the connecting portion in the substrate thickness direction.

3. The electrode post according to claim 1, wherein the connecting piece is connected to an edge of the connecting portion, and a surface of the connecting piece facing away from the hollowed-out space is flush with a circumferential surface of the connecting portion.

4. An electrode post according to claim 1, wherein the tab has a thickness in the range of 1mm to 5mm in a direction perpendicular to the substrate to the tab.

5. An electrode post according to claim 1, wherein the connecting tab is spaced from one end of the connecting portion to the other end remote from the connecting portion by a distance in the range of 1mm to 10 mm.

6. The electrode post according to claim 1, wherein the connecting piece is formed with a plurality of notches extending therethrough in a direction perpendicular to the substrate to the connecting piece, the plurality of notches being spaced apart along a circumferential direction of the connecting portion, the notches extending through an end of the connecting piece remote from the connecting portion.

7. A battery cover, comprising:

a cover plate; and

the electrode post according to any one of claims 1 to 6, wherein the substrate abuts against the first surface of the cover plate, the connecting portion is disposed through the cover plate, and the connecting piece is foldable outward of the hollow space.

8. The battery cover of claim 7, wherein the battery cover includes a first insulating member disposed between the substrate and the cover plate for spacing the cover plate from the substrate; and/or the presence of a gas in the gas,

the battery cover comprises a second insulating piece, the second insulating piece is sleeved on the connecting portion, and the connecting piece abuts against the second insulating piece under the condition that the connecting piece is turned outwards towards the hollow space.

9. A power cell comprising a cell cover according to claim 7 or 8.

10. A power plant comprising the power cell of claim 9.

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