CN215816061U

CN215816061U - A casing, battery and battery package for battery

Info

Publication number: CN215816061U
Application number: CN202122101788.3U
Authority: CN
Inventors: 张男; 何波; 易梓琦
Original assignee: Xiamen Haichen New Energy Technology Co Ltd
Current assignee: Xiamen Hithium Energy Storage Technology Co Ltd
Priority date: 2021-09-01
Filing date: 2021-09-01
Publication date: 2022-02-11
Anticipated expiration: 2031-09-01

Abstract

The utility model discloses a shell for a battery, the battery and a battery pack. The case for a battery includes: a housing, a bottom of the housing comprising a first surface and a second surface, the first surface being located within the housing and the second surface being located outside the housing; and the reinforcing rib is arranged at the bottom of the shell and is formed by protruding one of the first surface and the second surface towards the other one of the first surface and the second surface. According to the shell for the battery, the reinforcing ribs are designed at the bottom of the shell, so that the strength of the bottom is improved, the deformation resistance is improved, and the flatness of the bottom is improved.

Description

A casing, battery and battery package for battery

Technical Field

The utility model relates to the technical field of batteries, in particular to a shell for a battery, the battery and a battery pack.

Background

With the development of new energy automobiles, the driving mileage of the automobile is higher and higher, the energy demand on the lithium battery is higher and higher, the lithium battery module is a battery pack formed by connecting a plurality of single lithium batteries in series, and the battery pack further comprises a battery management system, a thermal management system and other structures. In order to form the individual lithium batteries into the above-described battery pack structure, a case is provided to assemble the individual lithium batteries. Therefore, it is necessary to provide a further solution to the above-mentioned practical requirement of assembling a plurality of lithium batteries to form a battery pack. Meanwhile, in order to meet the endurance mileage, the size of the battery pack is larger and larger, the mode of the shell structure of the battery pack is reduced along with the increase of the size of the shell structure, and the service life of the shell structure is shortened due to the reduction of the mode.

On the other hand, in order to meet the requirements of high electric quantity and large endurance mileage, people use the super capacitor, but in the later stage of the life cycle of the super capacitor, because of various reasons, such as that high-pressure gas is generated inside to cause outward deformation of the shell, and long-term vibration causes compression of the soft material at the end part of the winding core and reduction of the total length, a gap is often generated between the winding core and the shell, so that the winding core vertically shakes inside the shell to generate abnormal sound and even cause bad results of an electric connection structure. In addition, the outer diameter of the case must be larger than that of the winding core due to the need of the liquid injection process, and the winding core is shaken in the case in the radial direction, which causes the same problem. This causes much trouble and inconvenience to the user, so that improvement is necessary.

On the other hand, a battery case for an automobile is inevitably subjected to resistance from external intrusion, easily causing deformation of the battery case and even damage to the internal structure of the battery. Therefore, improving the stability of the battery case of the motor vehicle contributes to reinforcing and strengthening the structure of the interior of the battery.

On the other hand, during welding, in order to achieve a higher quality fusion weld, the weld seam must be welded, for example, in a flat welding position, with the workpieces often reoriented, or slightly misaligned, during the actual welding operation. This necessitates a great deal of time and effort to handle in an automated manufacturing process.

Specifically, the existing battery case has the following disadvantages: the battery case has the advantages of simple structure of the battery case, small supporting force of the battery case, small compressive strength, no reinforcing rib at the bottom, deformation of the bottom after welding, poor flatness, no positioning groove at the bottom, poor positioning accuracy and no polar mark at the bottom.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. To this end, an object of the utility model is to propose a housing for a battery. The bottom of the shell is provided with reinforcing ribs to improve the strength of the bottom.

Another object of the present invention is to provide a battery having the above-mentioned case.

It is still another object of the present invention to provide a battery pack having the above battery.

A case for a battery according to an embodiment of the first aspect of the utility model includes: a housing, a bottom of the housing comprising a first surface and a second surface, the first surface being located within the housing and the second surface being located outside the housing; and the reinforcing rib is arranged at the bottom of the shell and is formed by protruding one of the first surface and the second surface towards the other one of the first surface and the second surface.

According to the shell for the battery, the reinforcing ribs are designed at the bottom of the shell, so that the strength of the bottom is improved, the deformation resistance is improved, and the flatness of the bottom is improved.

According to some embodiments of the utility model, the bead forms a bead groove on the one of the first surface and the second surface, the bead groove having a depth d, wherein d satisfies: d is more than or equal to 0.1mm and less than or equal to 5 mm.

According to some embodiments of the utility model, the thickness of the bottom portion of the housing excluding the reinforcing ribs is equal to the thickness of the reinforcing ribs.

According to some embodiments of the utility model, the reinforcing rib protrudes from the first surface in a direction toward the second surface to constitute a pole.

According to some embodiments of the utility model, the reinforcing bar is in the shape of a "straight" or "cross".

According to some embodiments of the utility model, the housing is a hollow cylindrical structure.

A battery according to an embodiment of the second aspect of the utility model, comprising a case for a battery according to the above embodiment of the first aspect of the utility model; the battery cell is arranged in the shell.

According to some embodiments of the utility model, a current collecting disc is arranged at the bottom of the battery cell, a positioning structure is arranged on the surface of one side of the current collecting disc, which faces the bottom of the casing, and the positioning structure is matched with the reinforcing ribs of the casing.

According to some embodiments of the utility model, when the reinforcing bar forms a groove on the first surface of the bottom of the housing, the positioning structure is a protrusion that mates with the groove; when the reinforcing ribs form protrusions on the first surface, the positioning structures are grooves matched with the protrusions.

A battery pack according to an embodiment of the third aspect of the present invention includes a battery according to an embodiment of the above-described second aspect of the present invention.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic view of a case structure for a battery according to an embodiment of the present invention: the reinforcing ribs are formed by protruding the second surface towards the first surface;

fig. 2 is a schematic view of a case structure for a battery according to an embodiment of the present invention: the reinforcing ribs are formed by protruding the second surface towards the first surface;

fig. 3 is a schematic view of a structure of a case for a battery according to an embodiment of the present invention; the reinforcing ribs are formed by protruding the first surface towards the second surface;

fig. 4 is a schematic structural view of a case for a battery according to an embodiment of the present invention; the reinforcing ribs are formed by protruding the first surface towards the second surface;

fig. 5 is a schematic diagram of a cell structure according to an embodiment of the present invention;

fig. 6 is a schematic diagram of a battery structure according to an embodiment of the present invention.

Reference numerals:

200: a battery;

2: battery cell

21: a current collecting plate; 22: and a positioning structure.

100: a housing for a battery;

1: a housing; 11: reinforcing ribs; 12: a first surface; 13: a second surface.

Detailed Description

Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.

A case 100 for a battery according to an embodiment of the present invention is described below with reference to fig. 1 to 6. The case 100 for a battery may be applied to a battery 200, such as a lithium ion battery, and may also be applied to a battery pack.

As shown in fig. 1 to 4, a case 100 for a battery according to an embodiment of the first aspect of the present invention includes: the device comprises a shell 1, wherein the bottom of the shell 1 comprises a first surface 12 and a second surface 13, the first surface 12 is positioned in the shell 1, and the second surface 13 is positioned outside the shell 1; and a reinforcing rib 11, wherein the reinforcing rib 11 is arranged at the bottom of the shell 1, and the reinforcing rib 11 is formed by one of the first surface 12 and the second surface 13 protruding towards the other one of the first surface 12 and the second surface 13. Establish strengthening rib 11 through 1 bottoms of casing, promote bottom strength, increased 1 anti deformability of casing, improve the bottom plane degree.

The rib 11 according to the present invention forms a rib groove in one of the first surface 12 and the second surface 13 as shown in fig. 1 and 4, the rib groove having a depth d, wherein d satisfies: d is more than or equal to 0.1mm and less than or equal to 5 mm. Therefore, the reinforcing ribs 11 play a role in reinforcing the shell 1 and positioning at the same time, and the accuracy of battery welding is improved.

According to some embodiments of the present invention, the thickness of the bottom portion of the housing 1 excluding the reinforcing ribs 11 is equal to the thickness of the reinforcing ribs 11. From this, neither can increase 1 thickness of casing and weight, can play again and promote bottom intensity, increased 1 anti deformability of casing, improve the effect of bottom plane degree.

According to further embodiments of the utility model, as shown in fig. 3, the ribs 11 project from the first surface 12 in the direction of the second surface 13 to form poles. From this, strengthen bottom intensity, make things convenient for the bulge to make things convenient for Pack to weld simultaneously.

According to some embodiments of the utility model, the reinforcing ribs 11 are in the shape of a "straight" or "cross", or in the shape of a ring, or a hexagon, or any other shape that can be applied to the bottom of the housing 1 according to the utility model. Preferably, "one" or "ten" font, or annular, or hexagon etc. and the bottom of casing 1 coaxial setting, from this, promote casing 1 bottom intensity, increased casing 1 resistance to deformation ability, have the positioning action simultaneously.

According to some embodiments of the utility model, the housing 1 is a hollow cylindrical structure. The hollow structure is convenient for placing the battery core 2; the reinforcing ribs 11 can improve the strength of the bottom, increase the deformation resistance of the shell 1 and stabilize the structure of the shell 1.

As shown in fig. 5 to 6, a battery 200 according to an embodiment of the second aspect of the present invention includes a case 100 for a battery according to an embodiment of the first aspect of the present invention; cell 2, cell 2 establishes in casing 1. The reinforcing ribs 11 improve the strength of the bottom of the case 100 for a battery, increase the deformation resistance of the case 1, and improve the flatness of the bottom. Meanwhile, the battery has a polarity identification function, the battery anode is indicated, and further, the reinforcing ribs 11 can be coated and colored, so that the polarity is identified more obviously.

According to some embodiments of the present invention, as shown in fig. 5 to 6, the bottom of the battery cell 2 is provided with a current collecting disc 21, a side surface of the current collecting disc 21 facing the bottom of the casing 1 is provided with a positioning structure 22, and the positioning structure 22 is matched with the reinforcing rib 11 of the casing 1. Specifically, when the reinforcing ribs 11 form grooves on the first surface 12 of the bottom of the housing 1, the positioning structures 22 are protrusions that fit into the grooves; when the ribs 11 form a protrusion on the first surface 12, the locating formation 22 is a groove which mates with the protrusion. The corresponding arrangement of the reinforcing ribs 11 and the positioning structures 22 can play a role in positioning and reinforcing the shell 1. The deformation resistance of the housing 1 is further increased.

A battery pack according to an embodiment of the third aspect of the present invention includes the battery 200 according to the above-described embodiment of the second aspect of the present invention. Therefore, the battery pack structure is more stable.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A housing for a battery, comprising:

a housing, a bottom of the housing comprising a first surface and a second surface, the first surface being located within the housing and the second surface being located outside the housing;

and the reinforcing rib is arranged at the bottom of the shell and is formed by protruding one of the first surface and the second surface towards the other one of the first surface and the second surface.

2. The housing for a battery of claim 1, wherein said ribs form rib grooves on said one of said first surface and said second surface, said rib grooves having a depth d, wherein d satisfies: d is more than or equal to 0.1mm and less than or equal to 5 mm.

3. The case for a battery according to claim 1, wherein a thickness of a portion of the bottom of the case other than the reinforcing ribs is equal to a thickness of the reinforcing ribs.

4. The case for a battery according to claim 1, wherein the reinforcing rib protrudes from the first surface in a direction toward the second surface to constitute a pole.

5. The case for a battery as claimed in claim 1, wherein the reinforcing rib has a line shape or a cross shape.

6. The case for a battery as claimed in any one of claims 1 to 5, wherein the case is a hollow cylindrical structure.

7. A battery, comprising:

a housing for a battery according to any one of claims 1-6;

the battery cell is arranged in the shell.

8. The battery of claim 7, wherein a current collecting disc is disposed on a bottom of the battery core, and a positioning structure is disposed on a surface of a side of the current collecting disc facing the bottom of the casing, and the positioning structure is engaged with the reinforcing rib of the casing.

9. The battery of claim 8, wherein when the rib forms a groove on the first surface of the bottom of the case, the positioning structure is a protrusion that mates with the groove;

when the reinforcing ribs form protrusions on the first surface, the positioning structures are grooves matched with the protrusions.

10. A battery pack comprising a battery according to any one of claims 7-9.