CN215771444U - Conducting strip, battery and consumer - Google Patents

Abstract

The embodiment of the application relates to the technical field of batteries, and in particular discloses a conducting strip, a battery and electric equipment, which comprises: the transition part comprises a first edge and a second edge which are oppositely arranged, the first edge of the transition part is connected with the first connecting part, the second edge of the transition part is connected with the second connecting part, the first connecting part can be bent relative to the transition part along the first edge, and the second connecting part can be bent relative to the transition part along the second edge. In this way, when the height difference occurs between the two electrode output ends of the battery cell, the transition portion can be utilized to compensate the height difference between the electrode output ends.

Description

Conducting strip, battery and consumer

Technical Field

The embodiment of the application relates to the technical field of batteries, in particular to a conducting strip, a battery and electric equipment.

Background

The lithium battery has the advantages of high energy density, high power density, multiple recycling times, long storage time and the like, is widely used on portable electronic equipment such as mobile phones, digital cameras, portable computers and the like, has wide application prospect in the aspects of large and medium-sized electric equipment such as electric vehicles such as electric bicycles, electric vehicles and the like, energy storage facilities and the like, and becomes a key for solving global problems such as energy crisis, environmental pollution and the like.

A battery generally has a cell, a protective plate, and an L-shaped nickel plate connecting the two. Specifically, two electrode output ends are arranged on the battery cell, and each electrode output end is correspondingly and electrically connected with the protection plate through an L-shaped nickel sheet. During production, one end of the L-shaped nickel sheet is welded with the protection plate, the other end of the L-shaped nickel sheet is welded with the electrode output end, and after the two electrode output ends are welded with the L-shaped nickel sheet, the L-shaped nickel sheet is bent to enable the protection plate to be stacked on the battery core.

In the process of implementing the present application, the inventors of the present application found that: because the condition that has the difference in height can appear unavoidably in two electrode output ends on the electric core, the difference in height of the unable compensation electrode output of L type nickel piece to lead to the protection shield to compare and predetermine the position slope, and then make the whole size of battery produce the deviation, be unfavorable for the production of battery.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, the embodiment of the application provides a conductive sheet, a battery and an electric device, which overcome the problem that the protective plate stacked on the battery cell is inclined in a preset position, so that the overall size of the battery is deviated, and the battery is not favorable for production and the like.

According to an aspect of the present application, there is provided a conductive sheet including: the battery comprises a first connecting part, a second connecting part and a transition part, wherein the transition part comprises a first edge and a second edge which are oppositely arranged, the first edge of the transition part is connected with the first connecting part, the second edge of the transition part is connected with the second connecting part, the first connecting part can be bent relative to the transition part along the first edge, the second connecting part can be bent relative to the transition part along the second edge, and when the height difference occurs between the two electrode output ends of the battery core, the height difference of the electrode output ends can be compensated by the transition part, so that the protection plate is horizontally positioned on the battery core, and the deviation of the whole size of the battery is reduced.

In an optional mode, the conductive sheet further includes a blocking wall, the blocking wall is connected to an edge of the second connection portion, and an included angle α between the blocking wall and the second connection portion satisfies: alpha is more than or equal to 80 degrees and less than or equal to 100 degrees.

In an alternative mode, the blocking wall is provided in a plurality, and the blocking walls are respectively connected to different sides of the second connecting portion.

In an alternative form, the width of the blocking wall and the transition portion in a direction away from the second connecting portion is the same.

In an alternative form, the transition and the barrier walls are coated with an insulating coating.

According to another aspect of the present application, there is provided a battery including a battery cell and a protection plate, the battery cell including a casing, an electrode assembly located in the casing, a first electrode and a second electrode located on a first surface of the casing and both electrically connected to the electrode assembly, at least one of the first electrode and the second electrode being connected to the protection plate through the conductive sheet as described above.

In an optional manner, a height of the first electrode protruding from the first surface is different from a height of the second electrode protruding from the first surface; the transition part is perpendicular to the second connecting part, the transition part and the first connecting part are located on the same plane, the first connecting part is connected with the protection plate, and the second connecting part is connected with the first electrode/the second electrode.

In an alternative mode, a height difference H between the first electrode and the second electrode, and a width D of the barrier wall in a direction away from the second connection portion satisfy: H/D is more than or equal to 0.9 and less than or equal to 1.1.

In an alternative form, the housing is a metal housing, the first electrode is insulated from the housing, and the second electrode is electrically connected to the housing.

According to another aspect of the present application, there is provided an electric device including: a battery as described above.

The beneficial effects of the embodiment of the application are that: different from the situation of the prior art, the embodiment of the present application is provided with the first connection portion, the second connection portion and the transition portion, wherein the transition portion includes the first side and the second side which are oppositely disposed, the first side of the transition portion is connected to the first connection portion, the second side of the transition portion is connected to the second connection portion, in addition, the first connection portion can be bent along the first side relative to the transition portion, the second connection portion can be bent along the second side relative to the transition portion, because the battery generally has the battery core, the protection plate and the nickel plate connecting the two, the common nickel plate is replaced by the embodiment, when the height difference occurs between the two electrode output ends of the battery core, the height difference between the electrode output ends can be compensated by using the transition portion, so that the protection plate is horizontally located on the battery core, and further, the deviation of the whole size of the battery is reduced, is beneficial to the production of the battery.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a schematic diagram of the overall structure of a battery according to an embodiment of the present application;

FIG. 2 is a schematic view of the overall structure of a conductive sheet according to an embodiment of the present application;

FIG. 3 is a schematic view of another structure of a conductive sheet according to an embodiment of the present invention;

FIG. 4 is an exploded view of a portion of the structure of a battery according to one embodiment of the present application;

fig. 5 is a schematic diagram of an internal structure of a cell of a battery according to an embodiment of the present application;

fig. 6 is a schematic view illustrating a usage state of a conductive sheet and a protective plate of a battery according to an embodiment of the present application;

fig. 7 is a schematic view illustrating another usage state of the conductive sheet and the protective plate of the battery according to an embodiment of the present application.

Detailed Description

In order to facilitate an understanding of the present application, the present application is described in more detail below with reference to the accompanying drawings and specific embodiments. It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for descriptive purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Furthermore, the technical features mentioned in the different embodiments of the utility model described below can be combined with each other as long as they do not conflict with each other.

In the present embodiment, the conductive sheet 10 is described as being applied to a battery as an example, and it should be understood that the conductive sheet 10 may be applied to electronic products other than batteries.

Referring to fig. 1, a battery 100 includes a conductive sheet 10, a battery cell 20, and a protective sheet 30. The battery cell 20 is electrically connected to the protection plate 30 through the conductive sheet 10.

Specifically, as for the above conductive sheet 10, as shown in fig. 1 and 2, the conductive sheet 10 is used to connect the battery cell 20 and the protection plate 30. The conductive sheet 10 includes a first connection portion 11, a second connection portion 12, a transition portion 13, and a blocking wall 14. One end of the transition part 13 is connected with the first connecting part 11, the other end of the transition part 13 is connected with the second connecting part 12, and the blocking wall 14 is connected with the edge of the second connecting part 12. The first connection portion 11 is configured to be connected to the protection plate 30, the second connection portion 12 is configured to be connected to the battery cell 20, the transition portion 13 is configured to compensate for an electrode height difference on the battery cell 20, and the blocking wall 14 is configured to support the protection plate 30, so as to reduce direct contact between the protection plate 30 and the battery cell 20. It is understood that the connection manner between the first connection portion 11 and the protection plate 30, and the connection manner between the second connection portion 12 and the battery cell 20 include, but are not limited to, a connection manner using welding, and other connection manners may also be used, such as: threaded, riveted, etc.

In some embodiments, the transition portion 13 includes a first edge 131 and a second edge 132 disposed opposite to each other, the first edge 131 of the transition portion 13 is connected to the first connection portion 11, the second edge 132 of the transition portion 13 is connected to the second connection portion 12, the first connection portion 11 is bendable along the first edge 131 relative to the transition portion 13, and the second connection portion 12 is bendable along the second edge 132 relative to the transition portion 13. After the protection plate 30 is connected to the battery cell 20 through the conductive sheet 10, the protection plate 30 may be bent toward the battery cell 20 through the first edge 131 and the second edge 132, so that the protection plate 30 is disposed on the battery cell 20 in a substantially parallel shape.

Since the first connection portion 11 can be bent along the first edge 131 relative to the transition portion 13, and the second connection portion 12 can be bent along the second edge 132 relative to the transition portion 13, in some embodiments, the transition portion 13 is perpendicular to the second connection portion 12, the transition portion 13 and the first connection portion 11 are located on the same plane, the first connection portion 11 is connected to the protection plate 30, and the second connection portion 12 is connected to the battery cell 20.

In some embodiments, when the protection plate 30 is disposed on the battery cell 20 in a substantially parallel shape, in order to ensure that the perpendicular distance from the protection plate 30 to the first surface 21a of the battery cell 20 is within a safe distance range, the included angle α between the blocking wall 14 and the second connection portion 12 may be set to satisfy: alpha is more than or equal to 80 degrees and less than or equal to 100 degrees.

In some embodiments, as shown in fig. 3, the blocking wall 14 is provided in a plurality, and the blocking walls 14 are respectively connected to different sides of the second connecting portion 12, such as: the number of the blocking walls 14 is two, the two blocking walls 14 are arranged oppositely, and the oppositely arranged blocking walls 14 can ensure that the protection plate 30 is stably positioned on the battery cell 20. It is understood that the number of the blocking walls 14 may be three, wherein two blocking walls 14 are disposed opposite to each other, the other blocking wall 14 is disposed opposite to the transition portion 13, and the three blocking walls 14 and the transition portion 13 enclose a limiting cavity (not shown), which may limit the protective plate 30 to directly contact with the battery cell 20.

In some embodiments, the width of the blocking wall 14 and the width of the transition portion 13 in the direction away from the second connecting portion 12 are the same, so that the protection plate 30 is located on the battery core 20 in a substantially parallel manner, and the protection plate 30 is conveniently attached with an insulating gummed paper or the protection plate 30 is subjected to low-pressure injection molding to form a protection body, and meanwhile, the installation space occupied by the protection plate 30 is reduced, so that the occupied volume of the battery is reduced, and the requirement of the battery for small size and light weight is met.

In some embodiments, the transition portion 13 and the blocking wall 14 are coated with an insulating coating, which can reduce electrical communication between the electronic components on the protective plate 30 and the battery core 20, thereby reducing short circuit of the battery, further ensuring the safety of the internal circuit of the battery, and improving the service life of the battery.

With regard to the battery cell 20, as shown in fig. 4 and 5, the battery cell 20 includes a casing 21, an electrode assembly 22, a first electrode 23, a second electrode 24 and an electrolyte 25, the electrolyte 25 is contained in a closed space inside the casing 21, the electrode assembly 22 is located in the casing 21 and is immersed in the electrolyte 25, the first electrode 23 and the second electrode 24 are located on the first surface 21a of the casing 21, the first electrode 23 and the second electrode 24 are both electrically connected to the electrode assembly 22, and at least one of the first electrode 23 and the second electrode 24 is connected to the protective plate 30 through the conductive sheet 10. It should be understood that the polarities of the first electrode 23 and the second electrode 24 are not limited as long as the polarities of the first electrode 23 and the second electrode 24 are opposite, for example: the first electrode 23 is a positive electrode, and the second electrode 24 is a negative electrode, or the first electrode 23 is a negative electrode, and the second electrode 24 is a positive electrode.

It should be noted that: the casing 21 is generally provided with a plurality of side walls, correspondingly, the casing 21 comprises a plurality of surfaces, and after the protection plate 30 is connected with the battery core 20 through the conductive sheet 10, the protection plate 30 is generally arranged on one surface of the casing 21 in a substantially parallel shape, wherein the "first surface 21 a" refers to a surface of the casing 21 close to the protection plate 30.

Specifically, the electrode assembly 22 is a laminated type, and the electrode assembly 22 includes a positive electrode tab 221, a negative electrode tab 222, and a separator 223. The positive electrode sheets 221 and the negative electrode sheets 222 are stacked alternately, and a separator 223 is disposed between any adjacent positive electrode sheets 221 and negative electrode sheets 222. It is understood that the number of the positive electrode tabs 221 and the negative electrode tabs 222 is not limited, and may be adaptively adjusted according to actual situations, for example: in order to reduce the space occupied by the battery cell 20 as much as possible, the number of the positive electrode tabs 221 and the negative electrode tabs 222 is preferably 1 or 2, and of course, in other embodiments, the number of the positive electrode tabs 221 and the negative electrode tabs 222 may be more than 3. In addition, in order to make the electrolyte 25 sufficiently wet the electrode assembly 22, and thus improve the energy density of the battery, in some other embodiments, the electrode assembly 22 may also be wound, that is, a wound battery cell 20 is formed, and when the electrode assembly 22 is packaged, the electrolyte 25 may conveniently flow from each gap into the lamination of the electrode assembly 22 due to the gap between the electrode assembly 22 and the case 21.

In some embodiments, the housing 21 is a metal housing, the first electrode 23 is insulated from the housing 21, and the second electrode 24 is electrically connected to the housing 21, such that the entire metal housing serves as an electrode of the battery.

It can be understood that the material and shape of the housing 21 can be adaptively adjusted according to actual needs, for example, in this embodiment, since the battery is installed in the frame of the smart wearable device as a power source of the smart wearable device, in order to make the battery have good mechanical performance, the material of the housing 21 can be steel alloy, and the shape of the housing 21 is substantially rectangular parallelepiped, but in other embodiments of the present application, the material of the housing 21 can also be aluminum alloy, iron alloy, copper alloy, nickel alloy, or stainless steel, and the shape of the housing 21 can also be a regular structure such as a column.

In some embodiments, the height of the first electrode 23 protruding from the first surface 21a is Xmm, the height of the second electrode 24 protruding from the first surface 21a is Ymm, and X ≠ Y, and the height difference between the first electrode 23 and the second electrode 24 is | Y-X | mm. When X > Y, at this time, the battery cell 20 and the protection plate 30 are connected by the conductive sheet 10, the first connection portion 11 is connected to the protection plate 30, the second connection portion 12 is connected to the second electrode 24, the transition portion 13 is perpendicular to the second connection portion 12, and a height difference between the first electrode 23 and the second electrode 24 is compensated by a separation distance between the first edge 131 and the second edge 132 of the transition portion 13. Similarly, when X < Y, at this time, the battery cell 20 and the protection plate 30 are connected by the conductive sheet 10, the first connection portion 11 is connected to the protection plate 30, the second connection portion 12 is connected to the first electrode 23, the transition portion 13 is perpendicular to the second connection portion 12, and a height difference between the first electrode 23 and the second electrode 24 is compensated by a separation distance between the first edge 131 and the second edge 132 of the transition portion 13.

It should be noted that: when X > Y, the protective plate 30 and the second electrode 24 of the battery cell 20 are connected by using the conductive sheet 10 to compensate for a height difference between the second electrode 24 and the first electrode 23, and at this time, as shown in fig. 6, the connection between the first electrode 23 and the protective plate 30 may be made by using a common nickel sheet. It is to be understood that, as shown in fig. 7, the connection between the first electrode 23 and the protection plate 30 can be connected by the conductive sheet 10, as long as the protection plate 30 is located on the battery cell 20 in a substantially parallel shape when bent toward the battery cell 20.

Similarly, when X < Y, the protective plate 30 and the first electrode 23 of the battery cell 20 are connected by using the conductive sheet 10 to compensate for the height difference between the first electrode 23 and the second electrode 24, and at this time, as shown in fig. 6, the connection between the second electrode 24 and the protective plate 30 may also be made by using a common nickel sheet. It is also understood that, as shown in fig. 7, the connection between the second electrode 24 and the protective plate 30 can also be made by using the conductive sheet 10, as long as the protective plate 30 is located on the battery cell 20 in a substantially parallel shape when bent toward the battery cell 20.

In some embodiments, the height difference between the first electrode 23 and the second electrode 24 is H, the width of the barrier wall 14 in the direction away from the second connection portion 12 is D, and: H/D is more than or equal to 0.9 and less than or equal to 1.1, so that the protection plate 30 can be arranged on the battery cell 20 in a roughly parallel shape.

In the embodiment of the present application, by providing the first connection portion 11, the second connection portion 12 and the transition portion 13, wherein the transition portion 13 includes the first edge 131 and the second edge 132 that are oppositely disposed, the first edge 131 of the transition portion 13 is connected to the first connection portion 11, and the second edge 132 of the transition portion 13 is connected to the second connection portion 12, in addition, the first connection portion 11 can be bent along the first edge 131 with respect to the transition portion 13, and the second connection portion 12 can be bent along the second edge 132 with respect to the transition portion 13, since the battery generally has the battery cell 20, the protection plate 30 and the nickel plate that connects the two electrode output ends, the commonly used nickel plate is replaced by the conductive plate 10 in the present embodiment, when a height difference occurs between the two electrode output ends of the battery cell 20, the transition portion 13 can be used to compensate the height difference between the electrode output ends, so that the protection plate 30 is horizontally located on the battery cell 20, thereby reducing the deviation of the whole size of the battery and being beneficial to the production of the battery.

The application also provides an embodiment of an electric device, the electric device includes the battery, and for specific structures and functions of the battery, reference may be made to the above embodiment, and details are not repeated here.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings, or which are directly or indirectly applied to other related technical fields, are intended to be included within the scope of the present application.

Claims (10)

1. The utility model provides a conducting strip, includes first connecting portion and second connecting portion, its characterized in that, conducting strip still includes transition portion, transition portion is including relative first limit and the second limit that sets up, the first limit of transition portion with first connecting portion are connected, the second limit of transition portion with the second connecting portion are connected, first connecting portion can be followed first limit for transition portion buckles, the second connecting portion can be followed the second limit for transition portion buckles.

2. The conductive sheet according to claim 1, further comprising a blocking wall connected to an edge of the second connection portion, wherein an included angle α between the blocking wall and the second connection portion satisfies: alpha is more than or equal to 80 degrees and less than or equal to 100 degrees.

3. The conductive sheet according to claim 2, wherein the blocking wall is provided in plural, and the plural blocking walls are connected to different sides of the second connecting portion, respectively.

4. The conductive sheet according to claim 3,

the width of the blocking wall and the width of the transition part in the direction away from the second connecting part are the same.

5. The conductive sheet according to any one of claims 1 to 4, wherein the transition and the barrier wall are coated with an insulating coating.

6. A battery comprising a cell and a protective plate, the cell comprising a casing, an electrode assembly located within the casing, a first electrode and a second electrode located on a first surface of the casing and both electrically connected to the electrode assembly, wherein at least one of the first electrode and the second electrode is connected to the protective plate via a conductive sheet according to any one of claims 1 to 5.

7. The battery of claim 6, wherein the first electrode protrudes above the first surface by a different height than the second electrode protrudes above the first surface;

the transition part is perpendicular to the second connecting part, the transition part and the first connecting part are located on the same plane, the first connecting part is connected with the protection plate, and the second connecting part is connected with the first electrode/the second electrode.

8. The battery according to claim 7,

the height difference H between the first electrode and the second electrode and the width D of the blocking wall in the direction far away from the second connecting part satisfy the following conditions: H/D is more than or equal to 0.9 and less than or equal to 1.1.

9. The battery of claim 7 or 8, wherein the housing is a metal housing, the first electrode is insulated from the housing, and the second electrode is electrically connected to the housing.

10. An electrical device comprising a battery according to any one of claims 6 to 9.

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