CN216793843U - Batteries and Terminal Equipment - Google Patents

Abstract

The present disclosure relates to a battery and a terminal device, including: a first conductive case and a second conductive case with an accommodating space, the first conductive case and the second conductive case are distributed along the radial direction of the battery and along the axis of the battery Symmetrically arranged in the cross section; the first conductive shell and the second conductive shell are buckled and connected in an insulating manner, and the accommodating space of the first conductive shell is communicated with the accommodating space of the second conductive shell in the connected state A accommodating cavity is formed, and the accommodating cavity extends along the axial direction of the battery; a battery cell is arranged in the accommodating cavity; a positive electrode assembly and a negative electrode assembly, both of which are arranged at the first end of the accommodating cavity On the other hand, the first conductive shell is connected to the battery cell through the positive electrode assembly, and the second conductive shell is connected to the battery cell through the negative electrode assembly. The structure of the present disclosure is beneficial to reduce the overall packaging volume of the battery, and improve the effective space and volumetric energy density of the battery, thereby improving the battery capacity and endurance.

Description

Batteries and Terminal Equipment

technical field

The present disclosure relates to the field of terminals, and in particular, to a battery and a terminal device.

Background technique

There are many kinds of lithium-ion batteries and are widely used. In small terminal equipment such as true wireless stereo headphones (TWS headphones), button batteries are often used.

Button batteries have the advantage of being small in size. However, the capacity of the button battery is not large and the battery life is limited, which gradually cannot meet the large power consumption requirements of small terminal devices, which affects the user experience. Therefore, how to increase the capacity of the button battery is a problem to be solved in the related art.

Utility model content

To overcome the problems in the related art, the present disclosure provides a battery and a terminal device.

According to a first aspect of the embodiments of the present disclosure, a battery is proposed, including:

a first conductive shell and a second conductive shell with accommodating spaces, the first conductive shell and the second conductive shell are distributed along the radial direction of the battery, and are arranged symmetrically along the axial section of the battery; the The first conductive shell and the second conductive shell are buckled and connected in an insulating manner. In the connected state, the accommodating space of the first conductive shell is communicated with the accommodating space of the second conductive shell to form a accommodating cavity. the cavity extends in the axial direction of the battery;

an electric core, arranged in the accommodating cavity;

A positive electrode assembly and a negative electrode assembly, the positive electrode assembly and the negative electrode assembly are both disposed on the first end side of the accommodating cavity, the first conductive shell is connected to the battery core through the positive electrode assembly, and the first conductive shell is connected to the battery core through the positive electrode assembly. Two conductive shells are connected to the battery core through the negative electrode assembly.

In some embodiments, the first conductive housing includes:

a first cover plate, located at the first end of the first conductive shell; the positive electrode assembly is connected to the first cover plate;

an arc-shaped first side wall, the first side wall is connected with the first cover plate to form an accommodating space of the first conductive shell.

In some embodiments, the second conductive housing includes:

a second cover plate, located at the first end of the second conductive shell; the negative electrode assembly is connected to the second cover plate;

an arc-shaped second side wall, the second side wall is connected with the second cover plate to form an accommodating space for the second conductive shell;

Wherein, the first cover plate and the second cover plate are insulated and connected, and the first side wall and the second side wall are insulated and connected, so as to connect the first conductive shell and the second conductive shell Body insulation connection.

In some embodiments, the edge of the first conductive shell for connecting with the second conductive shell is provided with: a plug portion;

The edge of the second conductive shell for connecting with the first conductive shell is provided with: a card slot;

The plug-in portion is assembled with the card slot to connect the first conductive shell with the second conductive shell.

In some embodiments, the card slot includes: a slot body and an insulating layer disposed on the surface of the slot body, and/or an insulating layer is disposed on the surface of the plug portion.

In some embodiments, the positive electrode assembly includes:

A positive electrode tab, one end is connected to the battery core, and the other end extends to the first cover plate;

The first solder tab is soldered on the first cover plate.

In some embodiments, the negative electrode assembly includes:

a negative electrode tab, one end is connected to the battery core, and the other end extends to the second cover plate;

The second solder tab is soldered on the second cover plate.

In some embodiments, it further includes: a bottom case;

The bottom case is disposed on the second end side of the accommodating cavity, and the bottom case is respectively connected with the first conductive shell and the second conductive shell to seal the accommodating cavity.

In some embodiments, it further includes: an insulating sealing ring; the insulating sealing ring is sleeved on the inner wall of the accommodating cavity.

According to a second aspect of the embodiments of the present disclosure, a terminal device is provided, including any one of the above-mentioned batteries.

The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects:

In the structure of the present disclosure, the positive electrode assembly and the negative electrode assembly are drawn from the same end of the battery, which always occupies the space at one end of the battery, effectively saves the space at the other end of the battery and the side of the battery, and reduces the inert space of the battery. It is beneficial to reduce the overall packaging volume of the battery, and improve the effective space and volumetric energy density of the battery, thereby improving the battery capacity and endurance.

It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description serve to explain the principles of the invention.

FIG. 1 is a schematic structural diagram of a button battery in the related art.

FIG. 2 is a schematic structural diagram of a battery according to an exemplary embodiment.

FIG. 3 is a partial schematic view of a battery according to an exemplary embodiment.

FIG. 4 is a partial schematic view of a battery according to an exemplary embodiment.

5 is a top view of a battery shown in accordance with an exemplary embodiment.

6 is a bottom view of a battery shown in accordance with an exemplary embodiment.

Detailed ways

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. Where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with some aspects of the invention as recited in the appended claims.

In the related art, positive and negative components are drawn out from both ends of the button battery, respectively, and the positive and negative components located at both ends of the case occupy space respectively, which seriously compresses the energy density of the battery and affects the capacity of the battery.

1, in the related art jaw type button battery, the outer shell 1' as a whole is used as the positive electrode of the battery, and the bottom case 2' is used as the negative electrode of the battery. The top of the casing 1' leads out the positive electrode tab 11' and the positive electrode welding tab 12'.

Under the limitation of the casing structure and the positive and negative polarities, the negative electrode tabs 21' in the negative electrode assembly can only be drawn out from the bottom case 2'. And in order to meet the packaging requirements, the negative electrode solder tab 22' in the negative electrode assembly must be connected from the bottom case 2' and extend a distance along the side of the case 1' to the top of the battery.

It can be seen that, in the structure of the related art, the positive electrode tab 11' and the positive electrode welding tab 12' occupy the space at the top of the battery, the negative electrode tab 21' and the negative electrode welding tab 22' occupy the space at the bottom of the battery, and the extension of the negative electrode welding tab 22' Parts also occupy space on the sides of the housing 1'. The repeated occupation of limited space will eventually lead to an increase in the packaging volume of the battery, while the effective space of the battery is compressed, and the volumetric energy density of the battery decreases.

In order to solve the technical problems in the related art, an embodiment of the present disclosure proposes a battery, comprising: a first conductive shell and a second conductive shell with an accommodating space, the first conductive shell and the second conductive shell are along the battery The radial distribution of the first conductive shell and the second conductive shell are buckled and insulated, and the accommodating space of the first conductive shell and the accommodating space of the second conductive shell in the connected state are arranged symmetrically along the axial section of the battery; The space communicates to form an accommodating cavity, and the accommodating cavity extends along the axial direction of the battery. The battery core is arranged in the accommodating cavity. A positive electrode assembly and a negative electrode assembly, the positive electrode assembly and the negative electrode assembly are both arranged on the first end side of the accommodating cavity, the first conductive casing is connected to the battery cell through the positive electrode assembly, and the second conductive casing is connected to the battery core through the negative electrode assembly. In the structure of the present disclosure, the positive electrode assembly and the negative electrode assembly are drawn from the same end of the battery, which always occupies the space at one end of the battery, effectively saves the space at the other end of the battery and the side of the battery, and reduces the inert space of the battery. It is beneficial to reduce the overall packaging volume of the battery, and improve the effective space and volumetric energy density of the battery, thereby improving the battery capacity and endurance.

In an exemplary embodiment, as shown in FIGS. 2 to 6 , the battery in this embodiment includes: a first conductive shell 10 , a second conductive shell 20 , a battery cell 30 , a positive electrode assembly 40 and a negative electrode assembly 50.

The first conductive shell 10 and the second conductive shell 20 have accommodating spaces, the first conductive shell 10 and the second conductive shell 20 are distributed along the radial direction of the battery, and are symmetrically arranged along the axial section of the battery. The first conductive shell 10 and the second conductive shell 20 are buckled and connected in an insulating manner. In the connected state, the accommodating space of the first conductive shell 10 communicates with the accommodating space of the second conductive shell 20 to form an accommodating cavity 100 . Axial extension of the battery. The battery cell 30 is disposed in the accommodating cavity 100 . The positive electrode assembly 40 and the negative electrode assembly 50 are both disposed on the first end side of the accommodating cavity 100 , the first conductive casing 10 is connected to the battery core 30 through the positive electrode assembly 40 , and the second conductive casing 20 is connected to the battery core 30 through the negative electrode assembly 50 . .

The battery in this embodiment may be a lithium ion battery such as a button battery or a 18650 lithium battery. Wherein, the first conductive shell 10 and the second conductive shell 20 may be steel shells or aluminum shells. The cell 30 is a wound cell.

In this embodiment, after the first conductive shell 10 and the second conductive shell 20 are insulated and connected to form a battery shell, the first conductive shell 10 is used as the positive electrode of the battery, and the second conductive shell 20 is used as the negative electrode of the battery. The positive electrode assembly 40 and the negative electrode assembly 50 can be simultaneously disposed on the first end side (referred to as the top) of the accommodating cavity 100 , which effectively saves space.

Wherein, after the first conductive shell 10 and the second conductive shell 20 are connected, a cylindrical shell with an open bottom (the second end of the accommodating cavity 100 ) and having the accommodating cavity 100 inside can be formed.

In an exemplary embodiment, as shown in FIG. 2 to FIG. 6 , the first conductive housing 10 includes: a first cover plate 101 and a first arc-shaped side wall 102 .

Referring to FIG. 3 , the first cover plate 101 is located at the first end of the first conductive shell 10 , and the positive electrode assembly 40 is connected to the first cover plate 101 . The arc-shaped first side wall 102 is connected to the first cover plate 101 to form an accommodating space for the first conductive shell 10 .

The first cover plate 101 and the first side wall 102 can be vertically connected, and the shape of the first conductive shell 10 is approximately half of a cylinder.

In an exemplary embodiment, as shown in FIG. 2 to FIG. 6 , the second conductive housing 20 includes: a second cover plate 201 and a second arc-shaped side wall 202 .

Referring to FIG. 4 , the second cover plate 201 is located at the first end of the second conductive shell 20 , and the negative electrode assembly 50 is connected to the second cover plate 201 . The arc-shaped second side wall 202 is connected with the second cover plate 201 to form an accommodating space for the second conductive shell 20 .

The first cover plate 101 is connected to the second cover plate 201 in an insulating manner, and the first side wall 102 is connected to the second side wall 202 in an insulating manner, so as to connect the first conductive housing 10 and the second conductive housing 20 in an insulating manner.

In this embodiment, the second cover plate 201 and the second side wall 202 can be vertically connected, and the shape of the second conductive shell 20 is approximately half of a cylinder. After the first conductive shell 10 and the second conductive shell 20 are connected, a cylindrical shell with an open bottom and an inner cavity can be formed.

In an exemplary embodiment, as shown in FIG. 2 to FIG. 6 , the edge of the first conductive housing 10 for connecting with the second conductive housing 20 is provided with: a plug portion 103 . The edge of the second conductive shell 20 for connecting with the first conductive shell 10 is provided with: a card slot 203 .

The plug portion 103 is assembled with the card slot 203 to connect the first conductive housing 10 and the second conductive housing 20 .

In this embodiment, the first conductive shell 10 and the second conductive shell 20 are plugged or embedded to form a cylindrical shell.

Wherein, at least one edge of the first conductive shell 10 may be provided with a plug portion 103 , and a corresponding edge of the second conductive shell 20 may be provided with a card slot 203 .

In an example, as shown in FIG. 3 to FIG. 4 , the edge of the first conductive shell 10 for connecting with the second conductive shell 20 includes: the side of the first cover plate 101 and the two sides of the first side wall 102 . side. In this example, the plug portion 103 may be provided at either side. However, in order to ensure the sealing performance, the plug portions 103 are provided at the three sides of the side of the first cover plate 101 and the two sides of the first side wall 102 .

In this example, the processing method of the plug portion 103 may be, for example, after the first conductive housing 10 is obtained by processing, the edges of the three sides of the first conductive housing 10 are thinned to form the plug portion 103 .

In another example, as shown in FIG. 3 to FIG. 4 , the edge of the second conductive shell 20 for connecting with the first conductive shell 10 includes: the side edge of the second cover plate 201 and the edge of the second side wall 202 . two sides. In this example, the card slot 203 can be provided only on either side according to the arrangement of the plug-in portion 103 . However, in order to ensure the sealing performance, the side edges of the second cover plate 201 and the two side edges of the second side wall 202 are all provided with card grooves 203 .

In this example, the processing method of the card slot 203 may be, for example: after the second conductive casing 20 is obtained by processing, the three sides of the second conductive casing 20 are moved to the inside of the second conductive casing 20 to process the card Slot 203.

In this embodiment, after the first conductive shell 10 and the second conductive shell 20 are plugged and assembled, the joints can be sealed by mechanical encapsulation or thermal compounding.

It can be understood that, in order to ensure the assembly requirements of the insertion portion 103 and the card slot 203 , the card slot 203 or the card slot 203 equipped with the insertion portion 103 has a certain thickness. However, compared with the thicknesses of the positive electrode assembly 40 and the negative electrode assembly 50 provided at this end, the thickness of the card slot 203 or the card slot 203 fitted with the plug-in portion 103 is negligible. Therefore, the second waste of space can be effectively avoided at the assembly of the first conductive shell 10 and the second conductive shell 20 .

In an exemplary embodiment, as shown in FIGS. 2 to 6 , the card slot 203 includes: a slot body and an insulating layer disposed on the surface of the slot body, and/or an insulating layer is disposed on the surface of the plug portion 103 .

In this embodiment, the contact surface between the card slot 203 and the insertion portion 103 is provided with an insulating layer to ensure the insulating connection between the card slot 203 and the insertion portion 103 .

The insulating layer may be a laid insulating material or a sprayed insulating material coating. The insulating material can be insulating paint or insulating glue made of rubber, resin, etc. materials.

In an exemplary embodiment, as shown in FIGS. 2 to 6 , the positive electrode assembly 40 includes: a positive electrode tab 401 and a first welding tab 402 . One end of the positive electrode tab 401 is connected to the battery cell 30 , and the other end extends to the first cover plate 101 . The first solder tab 402 is welded on the first cover plate 101 .

Wherein, the first solder tab 402 may be a nickel tab, and the first solder tab 402 facilitates connection with the terminal device when the battery is packaged in the terminal device.

In an exemplary embodiment, as shown in FIGS. 2 to 6 , the negative electrode assembly 50 includes: a negative electrode tab 501 and a second welding tab 502 . One end of the negative electrode tab 501 is connected to the battery cell 30 , and the other end extends to the second cover plate 201 . The second solder tab 502 is welded on the second cover plate 201 .

Wherein, the second solder pad 502 may be a nickel pad. The second solder tab 502 is matched with the first solder tab 402, and can be connected to the terminal device when the battery is packaged in the terminal device.

In the embodiment of the present disclosure, both the positive electrode assembly 40 and the negative electrode assembly 50 are arranged at the first end, which effectively saves the space at the bottom of the battery, and the sides of the first conductive shell 10 or the second conductive shell 20 do not need to be drawn out for welding. piece.

For the cylindrical shell formed after the first conductive shell 10 and the second conductive shell 20 are connected, in the diameter direction of the shells, this embodiment can save the thickness of one layer of solder tabs by about 0.1 mm.

In an exemplary embodiment, as shown in FIG. 2 to FIG. 6 , the battery of this embodiment further includes: a bottom case 60 . The bottom case 60 is disposed on the second end side of the accommodating cavity 100 , and the bottom case 60 is respectively connected with the first conductive shell 10 and the second conductive shell 20 to seal the accommodating cavity 100 .

Wherein, unlike the bottom case 2' in the related art as a negative electrode, the bottom case 60 in this embodiment is not charged. Therefore, the bottom case 60 in this embodiment does not need to be provided with solder tabs or lead-out tabs, and it is also not necessary to attach another layer of insulating tape.

Therefore, in terms of battery thickness, this embodiment can save the thickness of one layer of tabs, the thickness of one layer of nickel sheets, and the thickness of one layer of insulating tape, and the overall thickness of the battery can be saved by 0.2 mm to 0.3 mm.

In this embodiment, the bottom case 60 can effectively carry the battery cells 30 and can effectively seal the accommodating cavity 100 .

In an exemplary embodiment, as shown in FIGS. 2 to 6 , the battery of this embodiment further includes: an insulating sealing ring (not shown in the drawings); the insulating sealing ring is sleeved on the inner wall of the accommodating cavity 100 .

Wherein, the insulating sealing ring can be set as a plastic insulating ring. In the cylindrical shell formed by connecting the first conductive shell 10 and the second conductive shell 20 , the insulating sealing ring is located between the cell 30 and the shell. The shell, the plastic insulating ring and the bottom shell 60 are connected to perform mechanical sealing together.

The battery structure in the embodiment of the present disclosure, combined with FIGS. 2 to 6 and the foregoing embodiments, the present disclosure can achieve the following effects:

The outer shell formed by the insulating connection of the first conductive shell 10 and the second conductive shell 20 can not only accommodate the battery cells 30, but also serve as positive and negative electrodes respectively. The bottom case 60 is not charged and does not serve as an electrode. Both the positive electrode assembly 40 and the negative electrode assembly 50 can be disposed at the first end (top) of the casing, so that both the positive electrode assembly 40 and the negative electrode assembly 50 only need to occupy the top space of the battery, and do not need to occupy the space on the bottom case 60 side. Also, there is no need to lead out the nickel sheet extending along the side surface of the case from the bottom case 60 . It effectively reduces the inert space of the battery and improves the effective space of the battery.

Based on this, in terms of the overall thickness of the battery, since the thickness of one layer of tabs, one layer of nickel sheet and one layer of insulating tape can be saved at the bottom case 60 end, the overall thickness can be saved by 0.2 mm to 0.3 mm. In the diameter direction of the battery, since there is no need to arrange a nickel sheet on the side of the case, the thickness of a layer of soldering sheets can be saved, and 0.1 mm can be saved.

On the basis of the structure and space improvement effect, the embodiments of the present disclosure can effectively reduce the package volume, and improve the volume energy density of the battery by reducing the inert space of the battery. Compared with the battery capacity in the related art (generally 30mAh-60mAh), the battery capacity in the embodiment of the present disclosure can be increased by 2mAh-3mAh.

In an exemplary embodiment, an embodiment of the present disclosure further provides a terminal device, including the battery in the foregoing embodiment. The terminal device is, for example, a small mobile terminal such as a TWS headset, a calculator, a hearing aid, or a camera.

Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any modifications, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or common sense in the technical field not disclosed by the present disclosure technical means. The specification and examples are to be regarded as exemplary only, with the true scope and spirit of the invention being indicated by the following claims.

It should be understood that the present invention is not limited to the precise structures described above and shown in the accompanying drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims (10)

1. A battery, comprising:

the battery comprises a first conductive shell and a second conductive shell, wherein the first conductive shell and the second conductive shell are provided with accommodating spaces, are distributed along the radial direction of the battery and are symmetrically arranged along the axial section of the battery; the first conductive shell and the second conductive shell are buckled and connected in an insulating mode, the accommodating space of the first conductive shell and the accommodating space of the second conductive shell are communicated to form an accommodating cavity in the connected state, and the accommodating cavity extends along the axial direction of the battery;

the battery cell is arranged in the accommodating cavity;

the battery comprises a positive electrode assembly and a negative electrode assembly, wherein the positive electrode assembly and the negative electrode assembly are arranged on the first end side of the accommodating cavity, the first conductive shell is connected with the battery core through the positive electrode assembly, and the second conductive shell is connected with the battery core through the negative electrode assembly.

2. The battery of claim 1, wherein the first conductive housing comprises:

a first cover plate located at a first end of the first conductive housing; the positive electrode assembly is connected with the first cover plate;

the first cover plate is connected with the first side wall in an arc shape, and the first side wall is connected with the first cover plate to form an accommodating space of the first conductive shell.

3. The battery of claim 2, wherein the second conductive housing comprises:

a second cover plate located at a first end of the second conductive housing; the negative electrode assembly is connected with the second cover plate;

the second side wall is connected with the second cover plate to form an accommodating space of the second conductive shell;

the first cover plate is connected with the second cover plate in an insulating mode, and the first side wall is connected with the second side wall in an insulating mode so as to connect the first conductive shell with the second conductive shell in an insulating mode.

4. The battery according to claim 3,

the edge of the first conductive shell used for being connected with the second conductive shell is provided with: a plug-in part;

the edge of the second conductive shell used for being connected with the first conductive shell is provided with: a card slot;

the insertion part is assembled with the clamping groove to connect the first conductive shell with the second conductive shell.

5. The battery of claim 4, wherein the card slot comprises: the groove body and the insulating layer arranged on the surface of the groove body, and/or the insulating layer is arranged on the surface of the insertion part.

6. The battery according to any one of claims 2 to 5, wherein the positive electrode assembly comprises:

one end of the positive electrode lug is connected with the battery cell, and the other end of the positive electrode lug extends to the first cover plate;

the first welding lug is welded on the first cover plate.

7. The battery of any of claims 3-5, wherein the negative electrode assembly comprises:

one end of the negative pole tab is connected with the battery cell, and the other end of the negative pole tab extends to the second cover plate;

and the second welding sheet is welded on the second cover plate.

8. The battery according to any one of claims 1 to 5, further comprising: a bottom case;

the bottom shell is arranged on the second end side of the accommodating cavity and is respectively connected with the first conductive shell and the second conductive shell so as to seal the accommodating cavity.

9. The battery of claim 7, further comprising: an insulating seal ring; the insulating sealing ring is sleeved on the inner wall of the accommodating cavity.

10. A terminal device characterized by comprising the battery of any one of claims 1 to 9.

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