CN215342750U

CN215342750U - Battery and electronic equipment

Info

Publication number: CN215342750U
Application number: CN202121188128.7U
Authority: CN
Inventors: 陈志勇
Original assignee: Guangdong Mic Power New Energy Co Ltd
Current assignee: Guangdong Mic Power New Energy Co Ltd
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2021-12-28
Anticipated expiration: 2031-05-28

Abstract

The present invention relates to a battery and an electronic apparatus; the battery comprises a shell, a packaging assembly and a battery core; the housing has an open end; the packaging assembly is connected to the opening end through an insulating sealing element, the shell and the packaging assembly enclose to form a containing cavity, the packaging assembly comprises an aluminum cover plate and a packaging cover plate arranged on the aluminum cover plate, a safety valve is arranged on the aluminum cover plate, and a pressure relief hole is formed in the packaging cover plate; the battery cell is arranged in the accommodating cavity and provided with a first lug and a second lug, one of the first lug and the second lug is connected with the aluminum cover plate, and the other of the first lug and the second lug is connected with the shell. The safety valve and the pressure relief hole are arranged on the packaging assembly to form the pressure relief explosion-proof structure, the structure does not occupy the space inside the battery, the explosion-proof performance of the battery can be improved, and the capacity of the battery cannot be influenced.

Description

Battery and electronic equipment

Technical Field

The present invention relates to the field of energy storage devices, and more particularly, to a battery and an electronic device.

Background

With the development of electronic technology, the variety of electronic devices is increasing and the application is also wider. The battery is one of the more important components in the electronic device, and can stably supply power to the electronic device for a long time, so that the electronic device has a long standby time.

Nowadays, with the popularization of batteries, higher requirements are made on the safety of their use. The battery has an electrolyte therein, and the battery also has a certain internal pressure therein. When a battery is subjected to a large electrical load and a large thermal load during use, gas is generated inside the battery due to a short circuit, the internal pressure of the battery increases, and gas is generated due to decomposition of a large amount of electrolyte inside the battery, so that the internal pressure of the battery abnormally increases. Once the battery explodes, electrolyte in the battery may leak or splash, which may endanger the personal safety of the battery user while polluting the environment, and there is a great potential safety hazard. Therefore, the explosion-proof performance of the battery is one of the important indicators for judging the safety of the battery.

In the related art, some batteries are provided with an explosion-proof structure, but the explosion-proof structure of the existing batteries is generally complex, and occupies part of the space in the batteries, thereby limiting the capacity of the batteries.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a battery and electronic equipment, which solve the problems that the safety of the conventional battery is low, and the capacity of the battery is influenced due to the complex explosion-proof structure.

According to an aspect of the present invention, there is provided a battery including:

a housing having an open end;

the packaging assembly is connected to the opening end through an insulating sealing element, the shell and the packaging assembly enclose to form an accommodating cavity, the packaging assembly comprises an aluminum cover plate and a packaging cover plate arranged on the aluminum cover plate, at least one safety valve is arranged on the aluminum cover plate, and at least one pressure relief hole is formed in the packaging cover plate; and the number of the first and second groups,

the battery cell is arranged in the accommodating cavity and provided with a first lug and a second lug, one of the first lug and the second lug is connected with the aluminum cover plate, and the other of the first lug and the second lug is connected with the shell.

Optionally, an inwardly concave rolling groove is formed in the side wall of the shell near the open end in a rolling manner.

Optionally, an annular groove is formed in the open end of the housing, and the insulating sealing member is fixedly disposed in the annular groove.

Optionally, the insulating sealing member is a sealing rubber ring, and the insulating sealing member is wrapped at the edge portions of the aluminum cover plate and the packaging cover plate in a heat shrinkage manner.

Optionally, one or more protruding structures are disposed on the aluminum cover plate.

Optionally, the protruding structure is disposed at an edge region of the aluminum cover plate, the safety valve is disposed at a middle region of the aluminum cover plate, and the safety valve corresponds to the pressure relief hole.

Optionally, the protruding structure is an arc-shaped protruding structure facing the package cover plate.

Optionally, the encapsulation apron is the steel sheet, the encapsulation apron includes the bellying and centers on the edge portion that the bellying set up, the bellying with the edge portion is integrated into one piece, the pressure release hole is located on the bellying.

Optionally, one of the first tab and the second tab is connected with the aluminum cover plate by welding;

the other one of the first pole lug and the second pole lug is connected with the bottom wall of the shell in a welding mode.

According to another aspect of the utility model, there is provided an electronic device comprising a battery as defined in any one of the above.

The battery provided by the embodiment of the utility model adopts the structure that the packaging component of the battery is provided with the explosion-proof structure capable of releasing pressure, the explosion-proof structure comprises the safety valve arranged on the aluminum cover plate and the pressure release hole arranged on the packaging cover plate, the safety valve on the aluminum cover plate can be punctured to release pressure when the internal pressure of the battery is larger, and the air release hole on the packaging cover plate is matched with the safety valve below to release air well so as to improve the explosion-proof performance of the battery. The pressure relief explosion-proof structure of the battery provided by the embodiment of the utility model is simple, does not occupy the internal space of the battery, and can improve the safety of the battery without influencing the capacity of the battery.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

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

Fig. 1 is a sectional view of a battery provided in an embodiment of the present invention.

Fig. 2 is a schematic diagram of an external structure of a battery according to an embodiment of the present invention.

Description of reference numerals:

1-shell, 101-rolling groove, 102-ring groove, 2-insulating sealing element, 3-aluminum cover plate, 301-safety valve, 302-bulge structure, 4-packaging cover plate, 401-air leakage hole, 5-first tab, 6-second tab, 7-battery cell and 8-center pillar.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the utility model, its application, or uses.

Techniques and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be considered a part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

The structure of the battery provided by the embodiment of the utility model is described in more detail below with reference to fig. 1 and 2. The battery provided by the embodiment of the utility model can be a lithium ion battery, for example. The battery may be a cylindrical battery, for example, or may be a battery having another structural shape, which is not limited in the present invention.

According to the battery provided by the embodiment of the utility model, as shown in fig. 1 and fig. 2, the battery comprises a shell 1, a packaging component and a battery core 7; the housing 1 has an open end; the packaging assembly is connected to the opening end through an insulating sealing element 2, and the shell 1 and the packaging assembly enclose to form an accommodating cavity; the packaging assembly comprises an aluminum cover plate 3 and a packaging cover plate 4 arranged on the aluminum cover plate 3, wherein at least one safety valve 301 is arranged on the aluminum cover plate 3, and at least one pressure relief hole 401 is arranged on the packaging cover plate 4; the battery cell 7 is arranged in the accommodating cavity, the battery cell 7 is provided with a first tab 5 and a second tab 6, one of the first tab 5 and the second tab 6 is connected with the aluminum cover plate 3, and the other one of the first tab 5 and the second tab 6 is connected with the shell 1.

The packaging assembly is fixedly arranged at the opening end of the shell 1 and can cover the opening end of the shell 1 so as to form a sealing structure with the shell 1.

The housing 1 may be, for example, a cylindrical steel shell, one end of the steel shell is an open end, and the packaging member is fixedly disposed in the open end to form a cylindrical battery.

In the embodiments of the present application, the sealing of the battery is achieved by the packing assembly and the insulating seal 2. Wherein, the encapsulation subassembly includes aluminium apron 3 and encapsulation apron 4, encapsulation apron 4 sets up on the aluminium apron 3, aluminium apron 3's intensity is not high, encapsulation apron 4 can play certain guard action to it. Moreover, the safety valve 301 disposed on the aluminum cover plate 3 can be punctured to release pressure when the pressure inside the battery is high, and meanwhile, the pressure release hole 401 on the package cover plate 4 can be well matched with the safety valve 301 to release air, so as to ensure the safety of the battery.

The battery provided by the embodiment of the utility model adopts the structure that the packaging component of the battery is provided with the explosion-proof structure capable of releasing pressure, the explosion-proof structure comprises the safety valve 301 arranged on the aluminum cover plate 3 and the pressure release hole 401 arranged on the packaging cover plate 4, the safety valve 301 on the aluminum cover plate 3 can be punctured to release pressure when the internal pressure of the battery is larger, and the air release hole 401 on the packaging cover plate 4 is matched with the safety valve 301 below to release air well, so that the explosion-proof performance of the battery is improved. The pressure relief explosion-proof structure of the battery provided by the embodiment of the utility model is simpler, does not occupy the internal space of the battery (namely the space in the accommodating cavity), and can improve the safety of the battery without influencing the capacity of the battery.

In an alternative example of the present invention, as shown in fig. 1, an inwardly concave rolling groove 101 is formed in a portion of the side wall of the housing 1 near the open end by roll forming. This allows the open end of the housing 1 to be formed into a closed configuration to facilitate the secure placement of the insulating seal 2 at the open end.

In an alternative example of the present invention, as shown in fig. 1, a ring groove 102 is formed in the open end of the housing 1, and the insulating seal member 2 is fixedly disposed in the ring groove 102.

Specifically, the housing 1 and the package assembly are sealed by the insulating sealing member 2, and a rolling groove 101 is formed at a position of a side wall of the housing 1 near the opening end, so that an annular cavity, i.e., the annular groove 102, can be formed in the opening end, and such a design can provide a special accommodating space for the insulating sealing member 2.

In the embodiment of the present invention, the packaging assembly and the insulating sealing member 2 may be formed as a single piece before being mounted to the open end of the housing 1.

In an alternative example of the present invention, the insulating seal 2 is a sealing rubber ring.

The insulating seal 2 is made of, for example, a polypropylene material (i.e., a PP material).

In an alternative example of the present invention, the aluminum cover plate 3 and the package cover plate 4 in the package assembly are combined together, and the insulating sealing member 2 is wrapped around the edge portions of the aluminum cover plate 3 and the package cover plate 4 by means of heat shrinkage to form a single piece.

In an alternative example of the present invention, as shown in fig. 1, the aluminum cover plate 3 is provided with one or more protruding structures 302.

The aluminium cover plate 3 is also called aluminium bowl. Since the aluminum material is soft in texture compared to other metal materials, the protrusion structures 302 provided on the surface thereof contribute to the structural strength of the aluminum lid plate 3.

In an alternative example of the present invention, the protruding structure 302 is disposed at an edge region of the aluminum lid 3, the safety valve 302 is disposed at a middle region of the aluminum lid 3, and the safety valve 302 corresponds to the pressure relief hole 402.

When the safety valves 302 are arranged on the aluminum cover plate 3, all the safety valves 302 should be arranged in the middle area of the aluminum cover plate 3 so as to be correspondingly positioned on the air release holes 401 above the safety valves, thereby facilitating quick air release.

In addition, the number and the mode of the safety valves 302 can be flexibly adjusted according to the requirement, which is not limited in the present invention.

In an alternative example of the present invention, as shown in fig. 1, the protruding structure 302 is an arc-shaped protruding structure facing the package cover plate 4. And a safety valve is arranged on the arc-shaped bulge structure.

Of course, the protruding structure 302 may also be a protruding structure with other shapes, and those skilled in the art can flexibly set the protruding structure according to specific needs, which is not limited by the utility model.

In an alternative example of the present invention, as shown in fig. 1 and fig. 2, the package cover plate 4 is a steel plate, the package cover plate 4 includes a protrusion portion and an edge portion disposed around the protrusion portion, the protrusion portion and the edge portion are integrally formed, and the pressure relief hole 401 is located on the protrusion portion.

The pressure relief hole 401 is, for example, a through hole with a large size, but may also be designed to be a plurality of through holes with a small size, and those skilled in the art may flexibly set the through holes according to specific needs.

The shape of the pressure relief hole 401 may be, for example, a circular hole, a square hole, or other hole shapes, which is not limited in the present invention.

In an alternative example of the present invention, as shown in fig. 1, the battery cell 7 is a winding core.

The scheme provided by the embodiment of the utility model is that the explosion-proof structure capable of carrying out pressure relief is directly arranged on the packaging assembly, so that the explosion-proof structure does not occupy the space in the accommodating cavity, namely the space of the battery cell 7 is not occupied, and the capacity of the battery is not limited.

It should be noted that the battery cell 7 is not limited to the winding structure described above, and may also be a laminated structure, and a person skilled in the art may flexibly select the type of the battery cell according to specific needs, and the utility model is not limited to this.

In the embodiment of the present invention, the first electrode 5 and the second electrode 6 are respectively led out from the battery cell 7, and are respectively connected to the aluminum cover plate 3 and the housing 1 through the first tab 5 and the second tab 6.

As shown in fig. 1, the battery cell 7 has a first tab 5 and a second tab 6, where one of the first tab 5 and the second tab 6 is a positive tab, and the other is a negative tab.

In an alternative example of the present application, one of the first tab 5 and the second tab 6 is connected to the aluminum cover plate 3 by welding; the other of the first tab 5 and the second tab 6 is connected with the bottom wall of the casing 1 by welding.

The first tab 5 and the second tab 6 may be welded by spot-bottom welding and external welding.

The spot bottom welding is to put the battery cell 7 into the accommodating cavity of the shell 1, and then extend a welding needle into the cavity of the battery cell 7 to contact with a tab for welding, wherein the specific welding mode is resistance welding. The external welding is to weld another tab from the outside after the housing 1 and the package assembly are assembled, and generally adopts laser welding or resistance welding.

In the embodiment of the present invention, as shown in fig. 1, two tabs, that is, the first tab 5 and the second tab 6, are led out from the battery cell 7, the tab subjected to spot-bottom welding may be perpendicular to the end surface of the battery cell by 90 degrees, and may be L-shaped, and the tab subjected to external welding may be L-shaped or double-folded zigzag.

On the other hand, the embodiment of the utility model also provides an electronic device, which comprises the battery as described in any one of the above embodiments.

The electronic device may be, but is not limited to, a smart phone, and may also be an electronic product such as a tablet computer, a notebook computer, an electronic book reader, and a smart wearable device (e.g., a smart watch), and the embodiment of the present application does not limit the specific kind of the electronic device.

Although some specific embodiments of the present invention have been described in detail by way of illustration, it should be understood by those skilled in the art that the above illustration is only for the purpose of illustration and is not intended to limit the scope of the utility model. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.

Claims

1. A battery, comprising:

a housing (1), said housing (1) having an open end;

the packaging assembly is connected to the opening end through an insulating sealing element (2), the shell (1) and the packaging assembly enclose to form a containing cavity, the packaging assembly comprises an aluminum cover plate (3) and a packaging cover plate (4) arranged on the aluminum cover plate (3), at least one safety valve (301) is arranged on the aluminum cover plate (3), and at least one pressure relief hole (401) is formed in the packaging cover plate (4); and the number of the first and second groups,

electric core (7), electric core (7) set up in hold the intracavity, electric core (7) have first utmost point ear (5) and second utmost point ear (6), first utmost point ear (5) with one of them of second utmost point ear (6) with aluminium system apron (3) are connected, first utmost point ear (5) with another one of them of second utmost point ear (6) with casing (1) are connected.

2. The battery according to claim 1, wherein an inwardly concave rolling groove (101) is formed in the side wall of the case (1) near the open end by roll forming.

3. The battery according to claim 1, wherein an annular groove (102) is formed in the open end of the case (1), and the insulating seal member (2) is fixedly disposed in the annular groove (102).

4. The battery according to claim 1, characterized in that the insulating sealing member (2) is a sealing rubber ring, and the insulating sealing member (2) is wrapped on the edge parts of the aluminum cover plate (3) and the packaging cover plate (4) in a heat-shrinkable mode.

5. The battery according to claim 1, characterized in that the aluminum cover plate (3) is provided with one or more protruding structures (302).

6. The battery according to claim 5, wherein the protrusion structure (302) is disposed at an edge region of the aluminum lid plate (3), the safety valve (301) is disposed at a middle region of the aluminum lid plate (3), and the safety valve (301) corresponds to the pressure relief hole (401).

7. The battery according to claim 5, characterized in that the protruding structure (302) is an arc-shaped protruding structure facing the package cover plate (4).

8. The battery according to claim 1, wherein the package cover plate (4) is a steel plate, the package cover plate (4) comprises a protrusion part and an edge part arranged around the protrusion part, the protrusion part and the edge part are integrally formed, and the pressure relief hole (401) is located on the protrusion part.

9. The battery according to claim 1, characterized in that one of the first tab (5) and the second tab (6) is connected to the aluminum cover plate (3) by welding;

the other one of the first tab (5) and the second tab (6) is connected with the bottom wall of the shell (1) in a welding mode.

10. An electronic device comprising a battery as claimed in any one of claims 1 to 9.