CN219642969U

CN219642969U - Shell of battery, battery module and power consumption device

Info

Publication number: CN219642969U
Application number: CN202321187509.2U
Authority: CN
Inventors: 杨昊名; 於洪将; 王汭; 魏磊
Original assignee: Jiangsu Zenio New Energy Battery Technologies Co Ltd
Current assignee: Jiangsu Zenio New Energy Battery Technologies Co Ltd
Priority date: 2023-05-17
Filing date: 2023-05-17
Publication date: 2023-09-05
Anticipated expiration: 2033-05-17

Abstract

The utility model belongs to the technical field of batteries, and particularly relates to a battery shell, which is provided with a first end and a second end which are opposite, wherein the first end is an opening at the top of the shell, the second end is a bottom surface of the shell, a side part of the shell is positioned between the first end and the second end, the side part is surrounded by one or more side surfaces, a widening part which is inclined outwards is arranged between the first end and at least one side surface, and the orthographic projection area of the second end is smaller than that of the first end. The shell disclosed by the utility model has the advantages that the breakdown risk and the light leakage risk of welding are improved to a certain extent, and the damage to the internal battery core during welding can be avoided. In addition, the utility model also provides a battery, a battery module and an electric device.

Description

Shell of battery, battery module and power consumption device

Technical Field

The utility model belongs to the technical field of batteries, and particularly relates to a battery shell, a battery module and an electric device.

Background

Nowadays, with the development of modern society and the enhancement of environmental awareness of people, more and more devices select lithium ion batteries as power sources, such as mobile phones, notebook computers, electric tools, electric automobiles and the like, which provides a wide space for the application and development of the lithium ion batteries.

However, in the existing aluminum-shell battery, breakdown and light leakage risks can occur when the aluminum shell and the top cover are welded, and meanwhile, the battery cells inside the shell are easily damaged in the welding process of the aluminum shell and the top cover, which is mainly because the structure of the shell of the existing battery cannot meet the requirement of protecting the battery cells inside the shell. For this reason, a new solution is needed to solve the above problems.

Disclosure of Invention

One of the objects of the present utility model is: aiming at the defects of the prior art, the shell of the battery is provided with a wider opening, so that the assembly of the top cover and the shell is more stable, the welding breakdown and light leakage risks at the opening of the shell are avoided, and a certain protection effect can be achieved on the battery cell in the shell.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

a housing of a battery, the housing having opposite first and second ends, the first end being a top opening of the housing, the second end being a bottom surface of the housing, a side portion of the housing being located between the first end and the second end, the side portion being surrounded by one or more side surfaces, there being a flared widened portion between the first end and at least one of the side surfaces, an orthographic projection area of the second end being smaller than an orthographic projection area of the first end.

Preferably, at least part of the widening part is in a plate-shaped structure, and an included angle between the outer surface of the side surface and the outer wall of the widening part is an obtuse angle, so that the widening part has a flaring effect on the shell.

Preferably, the widening is located on at least two of the sides, the widening being located on two adjacent sides and/or on two opposite sides.

Preferably, the bottom surface of the housing is perpendicular to one or more of the side surfaces, and the widened portion, the side portion and the bottom surface of the housing are integrally formed.

Preferably, at least one side surface with the widened portion is provided with a heat dissipation pipeline, the heat dissipation pipeline is used for cooling the battery cells in the shell, and the heat dissipation pipeline can be located on the inner surface or the outer surface of the side surface.

Preferably, the heat dissipation pipe is located at least two side surfaces having the widened portion, and the heat dissipation pipe is disposed at two adjacent side surfaces and/or two opposite side surfaces.

Preferably, the heat dissipation pipeline comprises a plurality of cooling pipe layers, each cooling pipe layer is formed by a bent cooling pipe, and one ends of the cooling pipes of adjacent cooling pipe layers are mutually communicated so as to realize the transmission of cold air or cooling liquid.

The second object of the present utility model is: the utility model provides a battery, includes electric core, top cap and as above casing, electric core holding in the inside of casing, the top cap set up in first end, widened portion is located the horizontal plane that the upper edge of electric core corresponds with between the top cap, so as to ensure the top cap with the welding area of casing is located widened portion, and can not cause the welding to break down the condition of electric core, ensure the electric core can not cause the harm.

The third object of the present utility model is to: there is provided a battery module including at least two batteries as described above, the widened parts of the respective cases being connected in the arrangement direction of the at least two batteries.

The fourth object of the utility model is that: there is provided an electrical device comprising a battery as described above.

The utility model has the beneficial effects that:

1) The shell is provided with a first end and a second end which are opposite, wherein the first end is a top opening of the shell, the second end is a bottom surface of the shell, a side part of the shell is positioned between the first end and the second end, the side part is surrounded by one or more side surfaces, a widened part inclining outwards is arranged between the first end and at least one side surface, the orthographic projection area of the second end is smaller than that of the first end, and the shell is provided with a wider opening by forming the widened part inclining outwards at the top opening of the shell;

2) In the process of assembling and welding the top cover and the shell, on one hand, the welding space is larger due to the widening part, so that the assembling and connecting area of the top cover and the shell is more, and at the moment, the size of the cross section of the shell is uniformly enlarged due to the uniformly inclined surface of the widening part, the size of the top cover is limited in the widened size range of the widening part, and the size precision requirement of the top cover is reduced; on the other hand, widening portion can play spacing effect to the top cap better to make the assembly of top cap and casing more stable, avoided appearing welding breakdown and the risk of light leak at the opening of casing, simultaneously, can also ensure that the welded area of top cap and casing is located widening portion, thereby can play certain guard action to the electric core in the casing.

Drawings

Features, advantages, and technical effects of exemplary embodiments of the present utility model will be described below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of embodiment 1 of the present utility model.

Fig. 1a is a front view of embodiment 1 of the present utility model.

Fig. 2 is a schematic structural diagram of embodiment 4 of the present utility model.

Fig. 3 is a schematic structural diagram of embodiment 5 of the present utility model.

Fig. 4 is a schematic structural diagram of embodiment 6 of the present utility model.

Fig. 5 is a schematic structural diagram of embodiment 7 of the present utility model.

Fig. 6 is a schematic structural diagram of embodiment 8 of the present utility model.

Wherein reference numerals are as follows:

1. a first end; 2. a second end; 3. a side surface; 4. a widening part; 5. a heat dissipation pipe; 6. a cooling tube; 7. a battery cell; 8. a top cover; θ, the angle between the outer surface of the side surface and the outer wall of the widened portion.

Detailed Description

Certain terms are used throughout the description and claims to refer to particular components. Those of skill in the art will appreciate that a hardware manufacturer may refer to the same component by different names. The description and claims do not take the form of an element differentiated by name, but rather by functionality. As used throughout the specification and claims, the word "comprise" is an open-ended term, and thus should be interpreted to mean "include, but not limited to. By "substantially" is meant that within an acceptable error range, a person skilled in the art can solve the technical problem within a certain error range, substantially achieving the technical effect.

In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the present utility model, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the preparation process of the battery, the aluminum shell and the top cover are required to be welded due to the fact that the connecting form is fixed, and the assembly form is easy to cause the problem of overlarge gap due to the fact that the aluminum shell and the top cover are not matched in the laser welding process, so that the problems of breakdown and even light leakage occur, and the production rate of the battery is greatly influenced. Therefore, the utility model provides a gradient open type shell structure so as to achieve the purposes of improving the safety of the battery cell and prolonging the service life of the battery cell.

The present utility model will be described in further detail below with reference to fig. 1 to 6 and the specific embodiments, but is not limited thereto.

Example 1

Referring to fig. 1, a battery case is provided, which has a first end 1 and a second end 2 opposite to each other, the first end 1 is a top opening of the case, the second end 2 is a bottom surface of the case, a side portion of the case is located between the first end 1 and the second end 2, the side portion is surrounded by a plurality of side surfaces 3, a widening portion 4 inclining outwards is provided between the first end 1 and at least one side surface 3, and an orthographic projection area of the second end 2 is smaller than an orthographic projection area of the first end 1.

The shell can be prepared by adopting a die extrusion process, and can be of a metal structure, the opening of the shell is enlarged at the position of the shell, where the top cover is required to be welded, so that the position of the opening of the shell and the battery core in the shell are not in a vertical line, for example, the size of the first end 1 is 1mm-2mm wider than that of the battery core, and the widened part 4 is inclined at a certain angle, so that the shell is shaped like a ladder and has a wider opening, on the one hand, the area where the top cover and the shell are assembled and connected is larger due to the widened part 4, the cross section size of the battery shell is uniformly increased, the size of the top cover only needs to be limited in a widened size range, and the battery shell can be matched with the shell for welding, the size precision requirement of the top cover can be reduced, on the other hand, the widened part 4 can better play a limiting role on the top cover, so that the assembly of the top cover and the shell is more stable, the occurrence of breakdown and the risk of the opening of the shell in the welding process of the top cover and the shell are avoided, and the light leakage area of the top cover and the shell can be ensured to be positioned in a certain protection area of the shell.

Preferably, referring to FIG. 1a, at least part of the widened portion 4 has a plate-like structure, and the angle between the outer surface of the side surface 3 and the outer wall of the widened portion 4 is θ, where θ is an obtuse angle, and 115 θ.ltoreq.θ.ltoreq.165 °.

Preferably, the sides of the housing are surrounded by four sides 3, the widening 4 being located on the four sides 3 of the housing, i.e. the widening 4 is located on two adjacent sides 3 and on two opposite sides 3.

Preferably, the bottom surface of the housing is perpendicular to the four sides 3 of the housing, and the widening 4, the sides and the bottom surface of the housing are of an integrally formed structure.

Example 2

Unlike embodiment 1, the side of the housing in this embodiment is surrounded by a side 3, the bottom of the housing is perpendicular to the side 3, the widened portion 4, the side and the bottom of the housing are in an integral molding structure, that is, on the basis of a circular or oval housing, the opening of the housing is enlarged at the position where the top cover needs to be welded on the housing, so that the position of the opening of the housing and the battery cell inside the housing are not in a vertical line, for example, the first end 1 of the housing is wider than the battery cell by 0.5mm to 2mm, the included angle θ between the outer surface of the side 3 and the outer wall of the widened portion 4 is 120 ° to 160 °, so that the housing has a wider opening, the risk of welding breakdown and light leakage occurring in the opening of the housing is avoided, and a certain protection effect is provided for the battery cell inside the housing.

Other structures are the same as those of embodiment 1, and will not be described here again.

Example 3

Unlike embodiment 1, the widened portion 4 of the present embodiment is provided on two adjacent side surfaces 3 or two opposite side surfaces 3, and the housing has a wider opening by forming the widened portion 4 of the camber at the top opening of the housing.

Example 4

Unlike embodiments 1 to 3, referring to fig. 2, the side 3 with the widened portion 4 of the present embodiment is provided with the heat dissipation pipe 5, and the heat dissipation pipe 5 helps to reduce the increase of the large-surface temperature during the use of the battery cell, reduces the safety problem caused by heat diffusion, protects the battery cell to a greater extent, and improves the service life of the battery to a greater extent.

Preferably, the heat dissipation duct 5 is located at least on two sides 3 with a widening 4, the heat dissipation duct 5 being arranged at two adjacent sides 3 and/or at two opposite sides 3.

Preferably, the heat dissipation pipeline 5 comprises a plurality of cooling pipe layers, each cooling pipe layer is formed by a curved cooling pipe 6, one ends of the cooling pipes 6 of the adjacent cooling pipe layers are mutually communicated, specifically, the cooling pipes 6 can be water cooling pipes, and the cooling pipe layers are sequentially arranged from the first end 1 of the shell to the second end 2 of the shell, so that welding risks and external heat transfer effects of electric core welding are effectively improved.

Example 5

Unlike example 4, the multi-layered cooling tube layers of this example are arranged in this order from left to right along the length direction of the casing, as seen in fig. 3, to function to reduce the temperature of the casing surface.

By designing a shell structure with different gradients, the breakdown risk and the light leakage problem existing during welding are effectively improved; meanwhile, due to the existence of gradient design, cooling equipment can be added on the large surface of the battery cell, so that the space is effectively utilized, the service life of the battery cell is prolonged, and the safety of the battery cell is improved.

Other structures are the same as those of embodiment 4, and will not be described here again.

Example 6

Referring to fig. 4, a battery comprises a battery cell 7, a top cover 8 and any one of the cases of embodiments 1-5, wherein the battery cell 7 is accommodated in the case, the top cover 8 is arranged at the first end 1, the widened portion 4 is positioned between a horizontal plane corresponding to the upper edge of the battery cell 7 and the top cover 8, the widened portion 4 enables the battery cell 7 and the top cover 8 to have a certain distance, and therefore a welding area of the top cover 8 and the case can be ensured to be positioned at the widened portion 4, and the battery cell 7 in the case can be protected to a certain extent.

Preferably, the battery may be a sodium ion battery, a lithium ion battery, a magnesium ion battery, or the like.

Example 7

A battery module, see fig. 5, comprising at least two batteries of embodiment 6, the widened parts 4 of the respective cases being connected in the arrangement direction of the at least two batteries, wherein a plurality of batteries are sequentially arranged in the length direction thereof.

Example 8

A battery module, see fig. 6, comprising at least two batteries of embodiment 6, the widened parts 4 of the respective cases being connected in the arrangement direction of at least two batteries, wherein the large faces of the plurality of batteries are in one-to-one correspondence, and the plurality of batteries are arranged in sequence in the width direction thereof.

Example 9

An electric device comprising the battery of embodiment 6, wherein the electric device may be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, or the like. The vehicle can be a fuel oil vehicle, a fuel gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle; spacecraft including airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys, such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete shakers, and electric planers, among others. The embodiment of the utility model does not limit the electric device in particular.

Variations and modifications of the above embodiments will occur to those skilled in the art to which the utility model pertains from the foregoing disclosure and teachings. Therefore, the present utility model is not limited to the above-described embodiments, but is intended to be capable of modification, substitution or variation in light thereof, which will be apparent to those skilled in the art in light of the present teachings. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not limit the present utility model in any way.

Claims

1. A housing for a battery, characterized by:

the shell is provided with a first end (1) and a second end (2) which are opposite, the first end (1) is an opening at the top of the shell, and the second end (2) is the bottom surface of the shell;

the side of the housing is located between the first end (1) and the second end (2), the side is surrounded by one or more side surfaces (3), and an outward-inclined widened part (4) is arranged between the first end (1) and at least one side surface (3);

the orthographic projection area of the second end (2) is smaller than the orthographic projection area of the first end (1).

2. The battery housing of claim 1, wherein: at least part of the widening part (4) is in a plate-shaped structure, and an included angle between the outer surface of the side surface (3) and the outer wall of the widening part (4) is an obtuse angle.

3. The battery case according to claim 1 or 2, wherein: the widening (4) is located on at least two of the side surfaces (3), and the widening (4) is arranged on two adjacent side surfaces (3) and/or two opposite side surfaces (3).

4. The battery case according to claim 1 or 2, wherein: the bottom surface of the shell is perpendicular to one or more side surfaces (3), and the widened part (4), the side parts and the bottom surface of the shell are of an integrated structure.

5. The battery case according to claim 1 or 2, wherein: at least one of the sides (3) with the widening (4) is provided with a heat-dissipating duct (5).

6. The battery housing of claim 5, wherein: the heat dissipation pipes (5) are located on at least two side surfaces (3) with the widened parts (4), and the heat dissipation pipes (5) are arranged on two adjacent side surfaces (3) and/or two opposite side surfaces (3).

7. The battery housing of claim 5, wherein: the heat dissipation pipeline (5) comprises a plurality of cooling pipe layers, each cooling pipe layer is formed by a bent cooling pipe (6), and one ends of the cooling pipes (6) of the adjacent cooling pipe layers are mutually communicated.

8. A battery, characterized in that: the battery pack comprises a battery cell (7), a top cover (8) and the shell as claimed in any one of claims 1 to 7, wherein the battery cell (7) is accommodated in the shell, the top cover (8) is arranged at the first end (1), and the widening part (4) is positioned between a horizontal plane corresponding to the upper edge of the battery cell (7) and the top cover (8).

9. A battery module, characterized in that: comprising at least two cells according to claim 8, the widening (4) of each of said housings being connected in the direction of arrangement of at least two of said cells.

10. An electrical device, characterized in that: comprising a battery according to claim 8.