CN211265526U

CN211265526U - Micro battery

Info

Publication number: CN211265526U
Application number: CN202020140507.8U
Authority: CN
Inventors: 黄凯; 欧阳巍; 辛汉帅; 赵国荣
Original assignee: Zhuhai Weiju Industrial Co ltd
Current assignee: Zhuhai Juneng New Energy Co ltd
Priority date: 2020-01-21
Filing date: 2020-01-21
Publication date: 2020-08-14
Anticipated expiration: 2030-01-21

Abstract

The utility model relates to a micro battery, which comprises a hard shell and an electric core arranged in the shell, wherein the electric core comprises at least one positive plate, at least one negative plate and at least one isolating plate arranged between the at least one positive plate and the at least one negative plate; the shell is in a special-shaped column shape so as to be matched with a specific installation space. The shape of the micro battery can be flexibly designed according to the specific installation space of the electronic equipment, so that the battery installation space in the electronic equipment is fully utilized, and diversified requirements of customers are met.

Description

Micro battery

Technical Field

The utility model relates to a battery technology field, more specifically say, relate to a miniature battery.

Background

Micro batteries are widely used in various aspects of life, especially in small portable electronic devices such as bluetooth headsets, hearing aids, and the like. Conventional micro-batteries are typically designed in the shape of a regular flat cylinder. However, the battery mounting space takes on various irregular shapes due to the unique external design of the electronic device, resulting in inconvenience in mounting the battery and insufficient utilization of the battery mounting space.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the present invention is to provide a micro battery to the above-mentioned defects of the prior art, so that the micro battery can adapt to the specific installation space of the electronic device.

The utility model provides a technical scheme that its technical problem adopted is: constructing a miniature battery comprising a rigid housing and a cell disposed in the housing, the cell comprising at least one positive plate, at least one negative plate, and at least one separator disposed between the at least one positive plate and the at least one negative plate; the shell is in a special-shaped column shape so as to be matched with a specific installation space.

In some embodiments, the cell is formed by winding and flattening the cell in a spiral winding.

In some embodiments, the cell is in the form of a laminate, and the shape of the cell matches the shape of the housing.

In some embodiments, the cross-section of the housing comprises at least one of a triangle, a diamond, a polygon, a curve.

In some embodiments, the housing includes a wall portion having at least one exit aperture disposed therethrough, the micro-battery further includes at least one electrical conductor disposed within the at least one exit aperture, and at least one insulating seal sealingly disposed between the aperture wall of the at least one exit aperture and the at least one electrical conductor, the at least one electrical conductor being electrically connected to the at least one positive tab or the at least one negative tab.

In some embodiments, the housing includes a lower case having an opening at the top and a mating upper case, and the wall portion is formed on the upper case, and the peripheral edge of the wall portion is sealingly combined with the opening edge of the lower case.

In some embodiments, the upper case further includes at least one protrusion protruding from a surface of the wall portion toward or away from the battery cell, and the at least one lead-out hole penetrates through the wall portion and the at least one protrusion in this order.

In some embodiments, the upper case and the lower case are made of a metal material, the upper case is electrically connected to one of the at least one positive electrode tab and the at least one negative electrode tab, and the at least one conductor is electrically connected to the other of the at least one positive electrode tab and the at least one negative electrode tab.

In some embodiments, the peripheral edge of the wall portion is hermetically joined to the opening edge of the lower case by laser welding;

the at least one protrusion is formed by stretching the wall portion toward a side facing toward or away from the cell.

In some embodiments, an end of the at least one protrusion remote from the wall portion is recessed inwardly to form a pressing portion to press and lock the at least one insulation sealing body.

Implement the utility model discloses following beneficial effect has at least: the housing of the micro battery is in a special-shaped column shape, and can be flexibly designed according to the specific installation space of the electronic equipment, so that the battery installation space in the electronic equipment is fully utilized, and diversified requirements of customers are met.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

fig. 1 is a schematic perspective view of a micro battery according to a first embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of the micro-battery of FIG. 1;

fig. 3 is a schematic perspective view of a micro battery according to a second embodiment of the present invention;

fig. 4 is a schematic plan view of the micro battery shown in fig. 3.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1-2 show a micro battery according to a first embodiment of the present invention, which may include a sealed rigid housing 1 and a cell 2 disposed in the housing 1. The shell 1 is in a special-shaped column shape, the cross section of the shell can be in regular or irregular shapes such as a triangle, a trapezoid, a diamond, a polygon, a curve and the like, and the shell can be flexibly designed according to the specific installation space of the electronic equipment so as to fully utilize the battery installation space in the electronic equipment and meet diversified requirements of customers. The utility model provides a miniature battery is particularly useful for among the small-size portable electronic equipment such as bluetooth headset, audiphone, and it can be solid-state battery, semi-solid state battery or liquid battery.

The battery cell 2 comprises at least one positive electrode sheet 21, at least one negative electrode sheet 22 and at least one separator 23 arranged between the at least one positive electrode sheet 21 and the at least one negative electrode sheet 22. Generally, the positive electrode sheet 21 is made of a semiconductor material such as lithium cobaltate, and the negative electrode sheet 22 is made of a conductor material such as graphite. The cells 2 may take the form of a stack of laminations, the stacking direction being along the height of the casing 1. In other embodiments, the stacking direction may also be along the width direction or the length direction of the housing 1. The shape of the battery core 2 is matched with that of the shell 1 so as to fully utilize the space in the shell 1. In the present embodiment, the positive electrode sheet 21, the negative electrode sheet 22, and the separator sheet 23 are all diamond-shaped sheet-shaped, which may be formed by press forming or cutting. In other embodiments, the battery cell 2 may also be wound in a spiral winding form into a cylindrical shape or an elliptic cylindrical shape, and then pressed flatly to form a desired shape after the winding is completed.

In the present embodiment, the housing 1 has a substantially flat rhombic column shape, and may include a straight cylindrical lower shell 12 having an opening at the top and a mating upper shell 11, wherein the periphery of the upper shell 11 and the opening edge of the lower shell 12 are sealingly joined together. The thickness of the upper and

lower cases

11 and 12 may be 0.1 to 1 mm. It is to be understood that the lower case 12 is not limited to a straight cylindrical shape, and may have other shapes such as a stepped cylindrical shape, a cylindrical shape in which the cross-sectional dimension gradually changes, and the like.

The housing 1 may be made of a metal material, such as stainless steel, aluminum, iron, or other metal material that can be welded by laser. The housing 1 may include a wall 111 having a lead-out hole 114 formed therethrough, and the lead-out hole 114 may be insulated from the conductive body 4, and the conductive body 4 may be flexible or rigid. The conductor 4 may be electrically connected to the positive electrode tab 21 via an electrode lead, and the case 1 may be electrically connected to the negative electrode tab 22 via an electrode lead. In another embodiment, the conductor 4 may be electrically connected to the negative electrode tab 22 through an electrode lead, and the case 1 may be electrically connected to the positive electrode tab 21 through an electrode lead. It is to be understood that the number of the lead-out holes 114 and the conductive bodies 4 is not limited to one, and two or more may be applied. When the number of the conductors 4 is two or more, the housing 1 may be made of laser-weldable plastic such as Peek, and the two or more conductors 4 are electrically connected to the positive electrode tab 21 and the negative electrode tab 22, respectively.

In the present embodiment, the wall portion 111 is formed on the upper case 11. The upper case 11 may include a flat plate-shaped wall portion 111, a protruding portion 112 protruding from one side surface of the wall portion 111 away from the battery cell 2, and a pressing portion 113 recessed inward from one end of the protruding portion 112 away from the wall portion 111. The peripheral edge of the wall portion 111 may be hermetically bonded to the opening edge of the lower case 12 by laser welding. The protruding portion 112 may be formed by stretching the wall portion 111 toward the side away from the battery cell 2. The angle between the protrusion 112 and the wall 111 may be 30 degrees⁰-150⁰Preferably 90, in⁰. The pressing portion 113 may be formed by spinning inward an end of the protrusion 112 away from the wall 111, which facilitates manufacturing. After the pressing portion 113 is spun inward, the pressing portion presses the insulating sealing body 3 to generate elastic deformation, so that the insulating sealing body 3 is locked and fixed in the leading-out hole 114, and is prevented from falling off. The locking and fixing mode has the advantages of simple structure, reliable locking, simple process and manufacture and the like, and an additional fixing piece is not required to be arranged to fix the insulating sealing body 3, so that the space utilization rate is higher. The included angle between the extruding portion 113 and the protruding portion 112 is an obtuse angle, which facilitates spinning and locking the insulating sealing body 3. In some embodiments, the included angle between the pressing portion 113 and the protrusion portion 112 may be 120⁰-160⁰Within the range, the good locking effect can be ensured.

The lead-out hole 114 penetrates the wall 111, the protrusion 112, and the pressing portion 113 in this order. An insulating sealing body 3 is hermetically plugged between the hole wall of the lead-out hole 114 and the outer wall of the electric conductor 4 so as to insulate and isolate the electric conductor 4 from the shell 1 and seal the lead-out hole 114. The insulating sealing body 3 can be made of flexible insulating materials such as silica gel and rubber, and can be in interference fit between the hole wall of the leading-out hole 114 and the outer wall of the electric conductor 4, so that the sealing performance and the combination stability can be improved. In other embodiments, the protrusion 112 may also protrude from one side surface of the wall 111 toward the battery cell 2.

Both ends of the insulating sealing body 3 may extend out of the lead-out holes 114, respectively, the overall height of the insulating sealing body 3 may be 0.5 to 5mm, and the heights of both ends extending out of the lead-out holes 114 may be 1mm or less, respectively. Because the insulating sealing body 3 is plugged in the leading-out hole 114 in an interference manner, the part of the insulating sealing body 3 positioned in the leading-out hole 114 is extruded and shrunk, and the parts of the two ends of the insulating sealing body 3 extending out of the leading-out hole 114 expand and reset, so that the sizes of the extending parts of the two ends are larger than that of the leading-out hole 114, and the sealing effect and the locking effect are further improved. In addition, one end of the insulating sealing body 3 corresponding to the extrusion part 113 extends out of the extrusion part 113, and the end of the extrusion part 113 can be embedded into the insulating sealing body 3, so that the locking effect is better.

In addition, because the cohesion between insulating seal 3 and the epitheca 11 has certain intensity value, after battery internal pressure exceeded this intensity value, insulating seal 3 and epitheca 11 can break away, realize opening the pressure release to furthest reduces battery safety hazard degree, improves battery security.

The electric conductor 4 is longitudinally penetrated in the insulating sealing body 3. The one end (upper end) that electric conductor 4 deviates from electric core 2 can stretch out outside insulating seal 3, and other end (lower extreme) can level or stretch out outside insulating seal 3 with insulating seal 3. A certain gap is formed between the lower end of the electric conductor 4 and the electric core 2, which is beneficial to heat insulation and provides a space for thermal expansion of the electric core 2.

When the external circuit board of the micro battery is used, the circuit board can be provided with avoiding holes corresponding to the protruding parts 112, and the avoiding holes are mutually inserted into the protruding parts 112, so that the space of the circuit board is effectively combined, the energy density of the battery cell is improved, and in addition, the circuit board can be conveniently installed and positioned.

The lead-out hole 114 can also be used for injecting electrolyte into the shell 1, and after the electrolyte injection is completed through the lead-out hole 114, the insulating sealing body 3 is plugged in for sealing, so that the electrolyte injection hole does not need to be additionally formed. In another embodiment, a single liquid injection hole (not shown) may be formed in the wall 111 for injecting the electrolyte into the casing 1. The micro battery may further include a sealing member (not shown) for sealing the injection hole after the injection is completed.

Fig. 3 to 4 show a micro battery according to a second embodiment of the present invention. In this embodiment, the cross section of the housing 1 is a curved shape, and may include a first arc segment 115, a second arc segment 116, a third arc segment 117, and a fourth arc segment 118 connected end to end in sequence. The first arc segment 115 and the third arc segment 117 are both semi-circular arcs and have the same diameter. The second circular arc segment 116 and the fourth circular arc segment 118 are concentrically arranged and are minor arcs.

It is to be understood that the above-described respective technical features may be used in any combination without limitation.

The above examples only represent the preferred embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims

1. A micro battery, characterized by comprising a hard casing (1) and a battery cell (2) arranged in the casing (1), wherein the battery cell (2) comprises at least one positive pole piece (21), at least one negative pole piece (22) and at least one spacer piece (23) arranged between the at least one positive pole piece (21) and the at least one negative pole piece (22); the shell (1) is in a special-shaped column shape so as to be matched with a specific installation space.

2. The micro battery according to claim 1, wherein the cell (2) is formed by winding and flattening in a spiral winding manner.

3. The microbattery of claim 1, wherein the cells (2) are in the form of laminations, the shape of the cells (2) matching the shape of the housing (1).

4. The micro-battery according to claim 1, wherein the cross-section of the housing (1) comprises at least one of a triangle, a diamond, a polygon, a curve.

5. The micro-battery according to any one of claims 1 to 4, characterized in that the housing (1) comprises a wall portion (111) through which at least one lead-out hole (114) is provided, the micro-battery further comprising at least one electrical conductor (4) provided in the at least one lead-out hole (114), and at least one insulating seal (3) sealingly provided between a wall of the at least one lead-out hole (114) and the at least one electrical conductor (4), the at least one electrical conductor (4) being electrically connected to the at least one positive electrode tab (21) or the at least one negative electrode tab (22).

6. The micro-battery according to claim 5, wherein the case (1) comprises a lower case (12) having an opening at the top and a mating upper case (11), the wall portion (111) is formed on the upper case (11), and the peripheral edge of the wall portion (111) is sealingly combined with the opening edge of the lower case (12).

7. The micro-battery according to claim 6, wherein the upper case (11) further comprises at least one protrusion (112) protruding from a surface of the wall portion (111) toward or away from the battery cell (2), and the at least one lead-out hole (114) penetrates the wall portion (111) and the at least one protrusion (112) in this order.

8. The micro-battery according to claim 7, wherein the upper case (11) and the lower case (12) are made of a metal material, the upper case (11) is electrically connected to one of the at least one positive electrode tab (21) and the at least one negative electrode tab (22), and the at least one conductor (4) is electrically connected to the other of the at least one positive electrode tab (21) and the at least one negative electrode tab (22).

9. The micro-battery according to claim 8, wherein the peripheral edge of the wall portion (111) is hermetically joined to the opening edge of the lower case (12) by laser welding;

the at least one projection (112) is formed by stretching the wall (111) to a side facing toward or away from the battery cell (2).

10. The micro-battery according to claim 7, wherein an end of the at least one protrusion (112) remote from the wall portion (111) is recessed inward to form a pressing portion (113) to press and lock the at least one insulating sealing body (3).