CN210092205U

CN210092205U - Battery with a battery cell

Info

Publication number: CN210092205U
Application number: CN201921168525.0U
Authority: CN
Inventors: 郭伟; 张科峰; 邓中军; 麻昊
Original assignee: Dongguan Nvt Technology Co Ltd
Current assignee: Dongguan Nvt Technology Co Ltd
Priority date: 2019-07-23
Filing date: 2019-07-23
Publication date: 2020-02-18
Anticipated expiration: 2029-07-23

Abstract

The utility model discloses a battery, battery includes: the battery comprises a battery core, a tab, a packaging bag, a sealing part and a protective circuit board. The tab is provided with a first end, a second end and a bending part connected between the first end and the second end; the battery cell is arranged in the packaging bag, the sealing part is arranged on the first side surface of the packaging bag, the packaging bag is provided with the sealing part at the pole lug, and the surface of the sealing part opposite to the pole lug is a top sealing surface; the protection circuit board is provided with a first surface and a second surface which are opposite, the first surface is provided with an electronic component and a connecting piece, the connecting piece is electrically connected with the second end of the lug, and the second surface and the bending part of the lug are oppositely arranged. From this, through utmost point ear, wrapping bag, sealed portion and protection circuit board cooperation, can prevent that the battery from taking place the short circuit, between sealed portion and electronic components, utmost point ear, can save the structure that sets up the internal insulation protection to can shorten the manufacturing process of battery, also can reduce the manufacturing cost of battery, thereby promote the size capacity of battery.

Description

Battery with a battery cell

Technical Field

The utility model belongs to the technical field of the battery and specifically relates to a battery is related to.

Background

The lithium ion battery has the advantages of high energy density, high reliability and the like, and is widely applied to the fields of mobile terminals, intelligent mobile homes, intelligent aircrafts and the like.

In the related art, the protection circuit board is provided with electronic components, after the battery core and the protection circuit board are assembled and the tabs are bent, the surface of the protection circuit board, on which the electronic components are arranged, is bent to the tab, and the electronic components and the tabs can generate short circuit risks. In the subsequent packaging process, in order to ensure the product safety and avoid the short circuit of the battery cell, various insulating materials are required to be additionally arranged between the battery cell lug and the battery cell sealing part and between the protection circuit board and the battery cell top sealing surface for insulation protection. However, the internal insulation packaging has the risk of damaging the battery cell, and potential safety hazards such as insulation failure exist. Moreover, the internal insulation packaging prolongs the manufacturing process of the battery, increases the time cost and the production cost of the battery, and simultaneously occupies a certain space to limit the size capacity of the battery core.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the present invention is to provide a battery, which does not need to be provided with an internal insulation protection structure.

According to the utility model discloses a battery includes: the battery comprises a battery core, a tab, a packaging bag, a sealing part and a protective circuit board. The lug is electrically connected with the battery cell and is provided with a first end, a second end and a bent part connected between the first end and the second end, and the second end and the bent part are arranged outside the battery cell; the battery cell is arranged in the packaging bag, the sealing part is arranged on the first side surface of the packaging bag, and the surface of the sealing part opposite to the tab is a top sealing surface at the tab; the protection circuit board is provided with a first surface and a second surface which are opposite, the first surface is provided with an electronic component and a connecting piece, the connecting piece is electrically connected with the second end of the tab, and the second surface and the bending part of the tab are oppositely arranged.

According to the utility model discloses a battery through utmost point ear, wrapping bag, seal part and protection circuit board cooperation, can prevent that the battery from taking place the short circuit under the condition of not establishing internal insulation protective structure, between seal part and electronic components, utmost point ear, can save the structure that sets up the internal insulation protection to can shorten the manufacturing process of battery, also can reduce the manufacturing cost of battery, thereby promote the size capacity of battery.

In some examples of the invention, the second surface is provided with an insulating material.

In some examples of the invention, the second end is connected to the connector by welding.

In some examples of the invention, the connector comprises: the first connecting piece and the second connecting piece are arranged in a stacked mode, the first connecting piece and the second connecting piece are arranged on the first surface, and the second end of the tab is arranged between the first connecting piece and the second connecting piece.

In some examples of the present invention, an edge of the second connecting piece is connected to an edge of the first connecting piece, so that the second end clamp of the tab is located between the first connecting piece and the second connecting piece.

In some examples of the invention, the connector is a flat plate.

In some examples of the present invention, the tab is a plurality of, a plurality of the tab and a plurality of the connecting member one-to-one.

In some examples of the present invention, the battery further comprises: an outer insulator covering the sealing portion.

In some examples of the invention, the external insulator is housed in the protection circuit board.

Additional aspects and advantages of the invention 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 invention.

Drawings

The above and/or additional aspects and advantages of the present invention 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 diagram of a battery according to an embodiment of the present invention;

FIG. 2 is an enlarged view at A in FIG. 1;

fig. 3 is a schematic front view of a battery according to an embodiment of the present invention before bending tabs;

fig. 4 is a schematic reverse view of a battery according to an embodiment of the present invention before bending tabs;

fig. 5 is a schematic front view of a battery according to an embodiment of the present invention after bending tabs;

fig. 6 is a schematic reverse side view of a battery with bent tabs according to an embodiment of the present invention.

Reference numerals:

a battery 10;

an electric core 1;

2, a tab; a second end 21; a bent portion 22;

packaging bags 3; the seal portion 31; a top cover 32;

a protection circuit board 4; a first surface 41; a second surface 42; an electronic component 43; a connector 44; a first connecting piece 45; a second connecting piece 46;

an outer insulator 5.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like 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 drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

A battery 10 according to an embodiment of the present invention is described below with reference to fig. 1 to 6.

As shown in fig. 1-6, according to the embodiment of the present invention, a battery cell 1, a tab 2, a packaging bag 3, a sealing portion 31 and a protection circuit board 4 are provided. Utmost point ear 2 electricity is connected in electric core 1, and utmost point ear 2 has first end, second end 21 and connects the kink 22 between first end and second end 21, and second end 21 and kink 22 set up in the outside of electric core 1, and it should be noted that first end sets up in the inside of electric core 1. The battery core 1 is arranged in the packaging bag 3, the sealing portion 31 is arranged on a first side surface of the packaging bag 3, and at the tab 2, a surface of the sealing portion 31 opposite to the tab 2 is a top sealing surface 32.

The protection circuit board 4 has a first surface 41 and a second surface 42 opposite to each other, the first surface 41 is provided with an electronic component 43 and a connector 44, the connector 44 is electrically connected to the second end 21 of the tab 2, the second surface 42 of the protection circuit board 4 is disposed opposite to the bent portion 22 of the tab 2, and the first surface 41 of the protection circuit board 4 is disposed away from the bent portion 22 compared to the second surface 42.

Wherein, at the in-process of production battery 10, link together utmost point ear 2 and the connecting piece 44 of electricity core 1, at the in-process of battery 10 encapsulation, through setting up utmost point ear 2 and electronic components 43 at the first surface 41 of protection circuit board 4, can avoid utmost point ear 2, electronic components 43 and the top seal face 32 direct contact of electricity core 1, can prevent that battery 10 from taking place the short circuit to can promote battery 10's safety in utilization. Between the tab 2, the electronic component 43 and the top sealing surface 32, a structure for internal insulation protection can be omitted, so that the manufacturing period of the battery 10 can be shortened, the production cost of the battery 10 can be reduced, the space inside the battery 10 can be saved, and the size capacity of the battery 10 can be improved. Meanwhile, in the process of packaging the battery 10, the electronic component 43 is arranged outside the deep pit surface of the battery core 1, so that the situation that the sharp part of the electronic component 43 pierces the packaging bag 3 can be eliminated, and the short circuit of the battery 10 can be further prevented.

Therefore, the tab 2, the packaging bag 3, the sealing part 31 and the protection circuit board 4 are matched, short circuit of the battery 10 can be prevented under the condition that an internal insulation protection structure is not arranged, and the structure for arranging the internal insulation protection can be omitted between the sealing part 31 and the electronic component 43 and the tab 2, so that the manufacturing process of the battery 10 can be shortened, the production cost of the battery 10 can be reduced, and the size capacity of the battery 10 can be improved.

In some embodiments of the present invention, the second surface 42 may be provided with an insulating material, so that the second surface 42 can be set as an insulating surface, the second surface 42 of the protection circuit board 4 can be prevented from being electrically connected to the tab 2, and the battery 10 can be better prevented from short-circuiting, thereby further improving the safety of the battery 10.

In some embodiments of the present invention, the second end 21 of the tab 2 is connected to the connecting member 44 by welding, that is, the second end 21 of the tab 2 is welded to the connecting member 44, so as to reliably weld the second end 21 of the tab 2 to the connecting member 44, thereby preventing the tab 2 from being separated from the connecting member 44, and ensuring the operational reliability of the battery 10.

In some embodiments of the present invention, as shown in fig. 2, the connecting member 44 may include: the first connecting piece 45 and the second connecting piece 46 are arranged in a stacked mode, the first connecting piece 45 and the second connecting piece 46 are arranged on the first surface 41 of the protective circuit board 4, the second end 21 of the tab 2 can be arranged between the first connecting piece 45 and the second connecting piece 46, the second end 21 of the tab 2 can be stably arranged between the first connecting piece 45 and the second connecting piece 46, the tab 2 and the connecting piece 44 can be stably assembled together, and therefore the mounting strength of the tab 2 and the connecting piece 44 can be improved.

In some embodiments of the present invention, the edge of the second connecting piece 46 is connected to the edge of the first connecting piece 45, so that the second end 21 of the tab 2 can be clamped between the first connecting piece 45 and the second connecting piece 46, and it should be explained that the second end 21 of the tab 2 extends into the gap between the first connecting piece 45 and the second connecting piece 46 from the unconnected position of the second connecting piece 46 and the first connecting piece 45, so that the second end 21 can be clamped between the first connecting piece 45 and the second connecting piece 46, and the work purpose of assembling the tab 2 and the connecting piece 44 can be achieved.

The utility model discloses an in some embodiments, connecting piece 44 is dull and stereotyped, and the connecting piece 44 of dull and stereotyped structure is more level and more smooth, can reduce the shared space of connecting piece 44 to can save battery 10 inner space, and then can further promote battery 10's size capacity.

The utility model discloses an in some embodiments, utmost point ear 2, connecting piece 44 all can set up to a plurality ofly, a plurality of utmost point ears 2 and a plurality of connecting piece 44 one-to-one, it is required to explain, the quantity that sets up of utmost point ear 2 and connecting piece 44 is the same, an utmost point ear 2 only is connected with a connecting piece 44 cooperation, set up like this and can avoid being provided with a plurality of utmost point ears 2 on a connecting piece 44, can guarantee utmost point ear 2's installation reliability to can prevent that a plurality of utmost point ears 2 from setting up and leading to battery 10 to take place the short circuit on same connecting piece 44.

In some embodiments of the present invention, as shown in fig. 1, the battery 10 may further include: external insulation spare 5, external insulation spare 5 cover are located sealed portion 31, and wherein, external insulation spare 5 can wrap up in sealed portion 31's the outside, and external insulation spare 5 has insulating effect, so set up and to avoid sealed portion 31 to be connected with other spare parts electricity, can prevent battery 10 to take place the short circuit better.

In some embodiments of the present invention, the external insulating member 5 wraps the protection circuit board 4, it should be noted that the external insulating member 5 can cover the protection circuit board 4, and the external insulating member 5 can protect the protection circuit board 4, and can prevent the protection circuit board 4 from being damaged, so as to prolong the service life of the protection circuit board 4, and also prevent the protection circuit board 4 from being electrically connected to other components, so as to further prevent the short circuit of the battery 10.

The process of assembling the battery 10 will be described below.

When assembling electric core 1 and protection circuit board 4, be connected on electric core 1 and the protection circuit board 4, can adopt utmost point ear 2 of electric core 1 to be under, make utmost point ear 2 be connected with sheetmetal (connecting piece 44), perhaps adopt utmost point ear 2 of electric core 1 to be on, make utmost point ear 2 be connected with flat nickel piece (connecting piece 44), battery 10 encapsulates the back, and electronic components 43 is located the positive outside of electric core 1, can avoid utmost point ear 2, electronic components 43 and the top seal face 32 direct contact of electric core 1. It should be noted that, as shown in fig. 3, after the tab 2 of the battery cell 1 is connected to the connecting member 44, the front side of the battery cell 1 refers to the side where the second surface 42 of the protection circuit board 4 before the tab 2 is bent is the front side of the battery cell 1, and the back side of the battery cell 1 refers to the side where the first surface 41 of the protection circuit board 4 before the tab 2 is bent is the back side of the battery cell 1.

The battery cell 1 may be a single battery cell 1 or a dual battery cell 1, or may be a multi-battery cell 1, and the specific implementation manner is as follows:

according to the utility model discloses a concrete embodiment: the reverse side of the battery core 1 faces upwards, and the lug 2 is connected with the metal sheet below. The reverse side of the battery cell 1 faces upwards, the tab 2 of the battery cell 1 is connected with the metal sheet on the battery cell 1 protection plate (the connection mode includes welding, riveting, buckling, limiting connection and the like), after the tab 2 is bent, the second surface 42 is in contact with the top sealing surface 32, and meanwhile, the second end 21 of the battery cell 1 is isolated from the top sealing surface 32. Compared with the existing connection scheme of the tab and the protection circuit board, after the battery cell 1 is packaged, the tab 2 and the electronic component 43 of the battery cell 1 can be isolated from the top sealing surface 32, and the risk of contact short circuit does not exist, so that the risk of internal short circuit of the battery 10 can be eliminated. Also, since the battery 10 of the present application has no risk of internal contact short circuits, the use of an internal insulating material of the battery 10 can be omitted, so that the production cycle and cost of the battery 10 can be reduced.

According to another embodiment of the present invention: the reverse side of the battery core 1 faces upwards, and the lug 2 is connected with the flat metal sheet on the upper side. The reverse side of electric core 1 is up, utmost point ear 2 of electric core 1 is connected last with the flat sheetmetal on electric core 1 protection shield (the connected mode has the welding, the riveting, the buckle, spacing connection etc.), utmost point ear 2 is buckled the back, second surface 42 and the contact of a front cover 32, electric core 1's second end 21 and a front cover 32 form simultaneously and keep apart, compare with prior art, can eliminate the inside short circuit risk of battery 10, also can cancel the inside insulating material of battery 10 and buckle the process to can improve the fail safe nature of battery 10. The tab 2 of the present application does not need to be bent by a special-shaped metal sheet through being connected to a flat metal sheet, and the production efficiency of the battery 10 can be further improved, so that the production cost of the battery 10 can be further reduced.

It should be noted that, if the multi-battery cell 1 or the special-shaped battery cell 1 is adopted, the packaging method is similar to the combination method of the single battery cell 1 and the double battery cells 1, and the tab 2 of the battery cell 1 or the position of the protection circuit board 4 can be adjusted to avoid direct contact between the two.

In the description herein, references to the description of the term "one embodiment," "some 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 invention. In this specification, the schematic representations of the terms used above 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 invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery, comprising:

an electric core;

the tab is electrically connected with the battery cell and provided with a first end, a second end and a bent part connected between the first end and the second end, and the second end and the bent part are arranged outside the battery cell;

the battery cell is arranged in the packaging bag;

the sealing part is arranged on the first side surface of the packaging bag, and the surface of the sealing part opposite to the tab at the tab is a top sealing surface;

the protection circuit board is provided with a first surface and a second surface which are opposite, the first surface is provided with an electronic component and a connecting piece, the connecting piece is electrically connected with the second end of the tab, and the second surface and the bending part of the tab are oppositely arranged.

2. The battery of claim 1, wherein the second surface is provided with an insulating material.

3. The battery of claim 1, wherein the second end is connected to the connector by welding.

4. The battery of claim 1, wherein the connector comprises: the first connecting piece and the second connecting piece are arranged in a stacked mode, the first connecting piece and the second connecting piece are arranged on the first surface, and the second end of the tab is arranged between the first connecting piece and the second connecting piece.

5. The battery of claim 4, wherein an edge of the second connecting tab is connected to an edge of the first connecting tab such that the second end of the tab is sandwiched between the first connecting tab and the second connecting tab.

6. The battery of claim 1, wherein the connector is a flat plate.

7. The battery of claim 1, wherein the plurality of tabs and the plurality of connectors are provided in a one-to-one correspondence.

8. The battery of claim 1, further comprising: an outer insulator covering the sealing portion.

9. The battery according to claim 8, wherein the external insulator covers the protection circuit board.