Shell structure of lithium battery pack

Abstract

The utility model provides a lithium battery pack shell structure, which relates to the technical field of lithium batteries and comprises a shell, the shell is divided into an outer shell and an inner shell, the inner shell is positioned in the outer shell, a buffer layer is arranged between the outer shell and the inner shell, a cavity is formed in the inner shell, a lithium battery body is arranged in the cavity, and the lithium battery body is arranged in the cavity. A plurality of ventilation openings are formed in the two sides of the outer shell, the shell is divided into the outer shell and the inner shell, the buffer layer is arranged between the outer shell and the inner shell, when the outer shell is subjected to impact force during external impact, the lithium battery stored in the cavity can be protected, and through the design of the ventilation openings, the service life of the lithium battery is prolonged. The lithium battery body can be ventilated and cooled, so that the condition that the service life is shortened due to overhigh temperature when the lithium battery body works is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, and in particular to a lithium battery pack shell structure. Background Art

[0002] At present, the structure of lithium-ion battery packs on the market is: the lithium-ion battery pack consists of a shell and battery cells in the shell. The disadvantages of this lithium-ion battery pack are: the shell is easily damaged under vibration and impact, and the buffering capacity for collision is poor. Since the shell is usually made of metal materials, it is easy for the shell to contact the battery cells after it breaks, causing a short circuit between the battery cells, thereby damaging the battery cells. Therefore, we propose a lithium battery pack shell structure. Utility Model Content

[0003] The purpose of the present utility model is to provide a utility model subject to solve the problems raised in the above background technology.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A lithium battery pack shell structure includes a shell, the shell is divided into an outer shell and an inner shell, the inner shell is located inside the outer shell, a buffer layer is arranged between the outer shell and the inner shell, a cavity is opened in the inner shell, a lithium battery body is arranged in the cavity, and multiple ventilation holes are arranged on both sides of the outer shell.

[0006] As a preferred solution of the utility model, the buffer layer is a plurality of prismatic buffer brackets made of plastic material.

[0007] The technical effect of adopting the above further solution is: by providing a buffer layer between the outer shell and the inner shell, the impact force when the shell is hit is alleviated, thereby protecting the lithium battery body stored in the inner shell.

[0008] As a preferred solution of the utility model, the vent is composed of a first pipe, a second pipe and a third pipe.

[0009] As a preferred solution of the utility model, both the first pipeline and the second pipeline are designed to be inclined upward and penetrate the outer shell and the buffer layer.

[0010] The technical effect of adopting the above further scheme is: the vent is connected with the internal cavity of the inner shell to ventilate and dissipate heat for the lithium battery body, wherein the upward inclined design of the internal pipes of the first pipe and the second pipe in the vent can not only ventilate but also play a waterproof role.

[0011] As a preferred solution of the utility model, the third pipe passes through the inner shell and is connected with the cavity.

[0012] As a preferred solution of the utility model, filter screens are provided on both sides of the inner shell and at the opening of the third pipe.

[0013] The technical effect of adopting the above further solution is: a filtering screen is provided at the opening where the third pipe communicates with the inner shell to play a shielding role.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] In the utility model, the shell is divided into an outer shell and an inner shell, and a buffer layer is provided between the outer shell and the inner shell. When the outer shell is subjected to the impact force of an external impact, the lithium battery stored in the cavity can be protected. Moreover, through the design of the vents, the lithium battery body can be ventilated and heat dissipated, so as to avoid the lithium battery body working so that its temperature is too high and the service life is shortened. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the overall structure of a lithium battery pack shell structure provided by the utility model;

[0017] Figure 2 A schematic top view of the internal structure of a lithium battery pack shell structure provided by the utility model;

[0018] Figure 3 A schematic diagram of the internal structure of a vent plane of a lithium battery pack shell structure provided by the utility model.

[0019] Legend: 1. Shell; 101. Outer shell; 102. Inner shell; 2. Buffer layer; 3. Cavity; 4. Lithium battery body; 5. Vent; 501. First pipe; 502. Second pipe; 503. Third pipe; 6. Filter screen. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0021] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant literature, and several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0022] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this article includes any and all combinations of one or more related listed items.

[0024] Example 1

[0025] like Figure 1-3 As shown, the utility model provides a technical solution: a lithium battery pack shell structure, including a shell 1, the shell 1 is divided into an outer shell 101 and an inner shell 102, the inner shell 102 is located in the outer shell 101, a buffer layer 2 is arranged between the outer shell 101 and the inner shell 102, a cavity 3 is opened in the inner shell 102, a lithium battery body 4 is arranged in the cavity 3, the buffer layer 2 is a plurality of prismatic buffer brackets, and is made of plastic material. By arranging the buffer layer 2 between the outer shell 101 and the inner shell 102, the impact force when the shell 1 is hit can be alleviated to protect the lithium battery body 4 stored in the inner shell 102.

[0026] Example 2

[0027] like Figure 1-3 As shown, a lithium battery pack shell structure is provided with multiple ventilation holes 5 on both sides of the shell 101, and the ventilation holes 5 are composed of a first pipe 501, a second pipe 502 and a third pipe 503. The first pipe 501 and the second pipe 502 are designed to be inclined upward and penetrate the shell 101 and the buffer layer 2, and are connected with the internal cavity 3 of the inner shell 102 through the ventilation holes 5, so as to ventilate and dissipate heat for the lithium battery body 4. The design of the internal pipes of the first pipe 501 and the second pipe 502 in the ventilation holes 5 being inclined upward can not only ventilate but also play a waterproof role. The third pipe 503 penetrates the inner shell 102 and is connected with the cavity 3. Filter screens 6 are provided on both sides of the inner shell 102 and at the opening of the third pipe 503. By arranging the filter screen 6 at the opening where the third pipe 503 is connected with the inner shell 102, a shielding effect is played.

[0028] The working process of the utility model is as follows: when using a lithium battery pack shell 101 structure, the shell 1 is divided into an outer shell 101 and an inner shell 102, and a buffer layer 2 is set between the outer shell 101 and the inner shell 102. When the outer shell 101 is subjected to the impact force of an external impact, the multiple prismatic buffer brackets in the buffer layer 2 can buffer the impact force of the shell 1 during the impact, protect the lithium battery body 4 stored in the inner shell 102, and avoid damage to the lithium battery body 4. In addition, the first pipe 501 and the second pipe 502 in the vent 5 are designed to be inclined upward, which can not only ventilate but also play a waterproof role, so as to avoid the lithium battery body 4 from working at an excessively high temperature and thus shortening its service life. A filter screen 6 is set at the opening where the third pipe 503 is connected to the inner shell 102 to play a shielding role. The structure is simple and practical.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lithium battery pack housing structure, comprising a housing (1), characterized in that: The housing (1) is divided into an outer shell (101) and an inner shell (102); the inner shell (102) is located inside the outer shell (101); a buffer layer (2) is provided between the outer shell (101) and the inner shell (102); a cavity (3) is provided inside the inner shell (102); a lithium battery body (4) is provided inside the cavity (3); and a plurality of vents (5) are provided on both sides of the outer shell (101).

2. A lithium battery pack housing structure according to claim 1, characterized in that: The buffer layer (2) is a plurality of prism-shaped buffer brackets made of plastic material.

3. The lithium battery pack housing structure according to claim 1, characterized in that: The ventilation port (5) is composed of a first pipe (501), a second pipe (502) and a third pipe (503).

4. A lithium battery pack housing structure according to claim 3, characterized in that: The first pipe (501) and the second pipe (502) are both designed to be inclined upward and penetrate the outer shell (101) and the buffer layer (2).

5. The lithium battery pack housing structure according to claim 3, characterized in that: The third pipe (503) passes through the inner shell (102) and is in communication with the cavity (3).

6. A lithium battery pack housing structure according to claim 3, characterized in that: Filter screens (6) are provided on both sides of the inner shell (102) and at the opening of the third pipe (503).

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