Novel square aluminum shell of secondary battery

Abstract

The utility model relates to the technical field of lithium batteries, in particular to a novel square aluminum shell of a secondary battery, which comprises a shell and a top cover mounted at the top end of the shell, and mounting fixture blocks are fixed at the left end and the right end of the top cover; a plurality of partition plates are uniformly and fixedly mounted at the bottom of the top cover; elastic air bags are fixed at the left and right ends of the plurality of partition plates; and moisture-proof mechanisms are arranged on the outer side and the back of the shell. According to the utility model, the defects in the prior art are overcome, and the moisture-proof mechanism is arranged, so that the dryness in the battery box can be effectively improved, and the damage of moisture to the lithium battery is reduced; by arranging the partition plates and the elastic air bags, the plurality of lithium batteries can be in closer contact with the shell; the problems of gaps and stability possibly existing when a plurality of lithium batteries are mounted can be effectively solved, and meanwhile, the mounting process is simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery shells, in particular to a novel square aluminum shell for secondary batteries. Background Art

[0002] In the manufacturing process of lithium batteries, aluminum shells are usually used as external packaging of batteries. Battery square aluminum shells usually refer to a shell used to package lithium batteries.

[0003] According to the publication number: CN219321486U, a square aluminum battery shell kit includes a battery shell body, one end of the battery shell body is fixed with a cover plate assembly, the cover plate assembly includes a cover plate body, one side of the cover plate body is covered with a film, and one side of the cover plate body is provided with a friction welding structure; the utility model fixes the positive and negative plates of the battery by using the friction welding structure, which can make the positive and negative plate structure more stable and the welding strength higher, which is conducive to improving the sealing and safety of the cover plate, and by arranging ceramic pads and rubber sealing rings on the positive and negative electrode seats, the support between the positive and negative electrode seats and the cover plate is enhanced, and the structural stability of the cover plate is improved. The injection molding process is used to add a lower plastic part instead of the traditional battery cover plate riveting, and the electrode welding ring is welded in the column hole, which can improve the production efficiency and reduce the production cost; however, the technical solution provided by the patent has the following problems:

[0004] (1) Multiple lithium batteries are usually placed and installed in a battery box, and the multiple lithium batteries are electrically connected through wires between the positive and negative terminals. However, since the battery box style and specifications are fixed, and the diameter style of the lithium batteries varies when they are replaced, it is inevitable that there will be a certain distance of gap when multiple lithium batteries are installed in the battery box. The existence of the gap will affect the stability of the lithium batteries. In order to fill the gap between the lithium batteries, foam, rubber blocks or other fillers are needed to fill the gap to ensure that the lithium batteries can remain stable after installation. Such operation may increase the complexity and time consumption of installation and is not convenient;

[0005] (2) During the charging and discharging process, the lithium batteries stored in the battery box will generate a certain amount of heat. The accumulated heat release may cause the internal temperature to rise, so the heat needs to be discharged through the heat dissipation holes. Then, the humid air from the outside may enter the battery box through these holes. The entry of moisture may cause certain harm to the lithium batteries and affect the safety of the batteries during use. Utility Model Content

[0006] The utility model aims to solve the technical problems raised by the above-mentioned background technology and provides a novel square aluminum shell for a secondary battery.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0008] A novel square aluminum shell for a secondary battery comprises: a shell and a top cover installed on the top of the shell, and mounting blocks are fixed on both left and right ends of the top cover;

[0009] A plurality of partition plates are evenly fixed on the bottom of the top cover;

[0010] Elastic air bags are fixed to the left and right ends of a plurality of the partition plates;

[0011] The outer side and the back of the shell are both provided with moisture-proof mechanisms.

[0012] Preferably, the moisture-proof mechanism comprises: a screen frame, a feeding port and heat dissipation holes;

[0013] The outer side and the back of the shell are both plugged with a screen frame;

[0014] The outer upper end of the mesh frame is provided with a feeding port for feeding a desiccant;

[0015] The outer lower end and the back lower end of the shell are penetrated with heat dissipation holes.

[0016] Preferably, a mounting cover is fixed to the top of the mesh frame, and a handle is hinged in the middle of the top of the mounting cover.

[0017] Preferably, two groups of heat dissipation holes are provided, one group of heat dissipation holes is located on the outer surface and back surface of the shell, and the other group of heat dissipation holes is located on the front and back sides of the inner wall of the shell, and the two groups of heat dissipation holes are arranged alternately.

[0018] Preferably, the two mounting blocks are arranged in an L shape, and a bolt hole penetrates one side of the mounting block.

[0019] Preferably, the plurality of partition plates are equidistantly distributed, the spacing between the plurality of partition plates is slightly larger than the width of the lithium battery, and the height of the plurality of partition plates is consistent with the depth of the shell.

[0020] Preferably, a plurality of the elastic airbags are arranged from top to bottom, and the widths of the plurality of elastic airbags gradually shorten from top to bottom.

[0021] The present invention provides a novel square aluminum shell for a secondary battery, which has the following beneficial effects:

[0022] 1. By setting up a moisture-proof mechanism, when the battery box is in use, the heat generated by the lithium battery in the shell can be discharged through the staggered heat dissipation holes; when the outside air flows into the shell, it needs to pass through the staggered heat dissipation holes; thus, it needs to contact a larger area of ​​the mesh frame, and the mesh frame is filled with desiccant, so that the outside air will contact the desiccant for a longer time; it can effectively improve the dryness inside the battery box, reduce the harm of moisture to the lithium battery, and improve safety;

[0023] 2. By setting up partitions and elastic air bags, after placing several lithium batteries in the shell, the top cover can be pressed into the shell; several partitions can also be inserted between several lithium batteries respectively; at this time, several lithium batteries will be squeezed by several elastic air bags whose widths gradually shorten from top to bottom; thereby making the contact between several lithium batteries and the shell closer; it can effectively solve the gap and stability problems that may exist when installing multiple lithium batteries, and at the same time simplify the installation process and improve the overall reliability and convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide an understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0025] In the attached picture:

[0026] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0027] Figure 2 It is a structural schematic diagram of the top cover of the utility model;

[0028] Figure 3 It is a structural schematic diagram of the shell section of the utility model;

[0029] Figure 4 It is a structural schematic diagram of the utility model screen frame.

[0030] In the figure: 1, shell; 2, top cover; 201, mounting block; 202, partition plate; 203, elastic airbag; 3, mesh frame; 301, mounting cover plate; 302, feeding port; 4, heat dissipation hole. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0032] Example: Figure 1 As shown, a novel square aluminum shell for secondary batteries, the shell 1 is used to accommodate lithium batteries, and moisture-proof mechanisms are provided on the outside and back of the shell 1, and the function of these mechanisms is to prevent the external humid environment from affecting the interior; the top cover 2 is installed on the top of the shell 1; the mounting blocks 201 are arranged in an L shape and fixed at the left and right ends of the top cover 2, and bolt holes are penetrated on one side of them, and the top cover can be firmly connected to the shell 1 by bolts, thereby increasing the stability and safety of the overall structure.

[0033] like Figure 1 , 3As shown in Figure 4, the function of the moisture-proof mechanism is mainly to protect the lithium battery in the battery box from moisture and effectively discharge the heat generated by the battery; the mesh frame 3 is located on the outside and back of the shell 1. This design allows the mesh frame 3 to be tightly combined with the shell 1, making the surface of the square battery box more regular; the mesh frame 3 is filled with a desiccant, such as silica gel or molecular sieve, which has hygroscopic properties and can absorb moisture in the air to reduce the humidity inside the battery box; the heat dissipation holes 4 are distributed at the lower end of the outer side and the lower end of the back of the shell 1. This design enables the heat dissipation holes 4 to effectively discharge the heat generated by the battery.

[0034] like Figure 1 , 3 As shown in Figure 4, a mounting cover plate 301 is fixed to the top of the mesh frame 3, and a handle is hinged in the middle of the top of the mounting cover plate 301 so that the user can take out the mounting cover plate 301 through the handle; a feeding port 302 for feeding a desiccant is provided at the upper end of the outer side of the mesh frame 3, and the design of the feeding port 302 can accommodate the desiccant, so that a dry environment can be formed inside the battery box. The desiccant is usually a material with strong hygroscopicity, such as silica gel or molecular sieve, which can absorb moisture in the air and reduce the humidity inside the battery box, thereby reducing the harm to the lithium battery; two groups of heat dissipation holes 4 are provided, one group of heat dissipation holes 4 is located on the outer surface and back surface of the shell 1, and the other group of heat dissipation holes 4 is located on the front and back sides of the inner wall of the shell 1. The two groups of heat dissipation holes 4 are staggered with each other. The staggered heat dissipation holes 4 can make the outside air contact with the desiccant for a longer time before entering the battery box, thereby better absorbing moisture, so that the air entering the battery box is drier.

[0035] like Figure 1-2 As shown, the partition plates 202 are fixed at the bottom of the top cover 2, and they are evenly distributed and the spacing is slightly larger than the width of the lithium battery; the height of these partition plates 202 is consistent with the depth of the shell 1, so as to ensure that they are tightly combined with the shell 1; the function of the partition plates 202 is to separate the gaps between each lithium battery to prevent them from interfering with each other in the shell; the elastic airbags 203 are fixed at the left and right ends of the partition plates 202, and the function of the elastic airbags 203 is to fill the possible gaps by squeezing the lithium battery after the top cover 2 is pressed into the shell 1, thereby increasing the contact area between the battery and the shell 1 and improving the stability; the design of the elastic airbag 203 with a width that gradually shortens from top to bottom can better adapt to batteries of different heights.

[0036] Working principle: First, after placing a number of lithium batteries into the shell 1, the top cover 2 can be pressed into the shell 1; a number of partition plates 202 can also be inserted between the lithium batteries respectively; at this time, the lithium batteries will be squeezed by a number of elastic air bags 203 whose widths gradually shorten from top to bottom; thereby making the contact between the lithium batteries and the shell 1 closer; thereafter, when the battery box is used, the heat generated by the lithium batteries in the shell 1 can be discharged through the staggered heat dissipation holes 4; so that when the outside air flows into the shell 1, it needs to pass through the staggered heat dissipation holes 4; thereby, it needs to contact a larger area of ​​the mesh frame 3, and the mesh frame 3 is filled with desiccant, so that the outside air will contact the desiccant for a longer time; it can effectively improve the dryness inside the battery box, reduce the harm of moisture to the lithium battery, and improve the overall reliability and convenience.

[0037] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A novel square aluminum shell for secondary batteries, comprising: The housing and the top cover installed on the top of the housing are characterized by: The left and right ends of the top cover are both fixed with mounting blocks; A plurality of partition plates are evenly fixed on the bottom of the top cover; Elastic air bags are fixed to the left and right ends of a plurality of the partition plates; The outer side and the back of the shell are both provided with moisture-proof mechanisms.

2. A novel square aluminum shell for secondary batteries according to claim 1, characterized in that: The moisture-proof mechanism comprises: a screen frame, a feeding port and heat dissipation holes; The outer side and the back of the shell are both plugged with a screen frame; The outer upper end of the mesh frame is provided with a feeding port for feeding a desiccant; The outer lower end and the back lower end of the shell are penetrated with heat dissipation holes.

3. A novel square aluminum shell for secondary batteries according to claim 2, characterized in that: A mounting cover plate is fixed on the top of the net frame, and a handle is hinged in the middle of the top of the mounting cover plate.

4. A novel square aluminum shell for secondary batteries according to claim 2, characterized in that: The heat dissipation holes are arranged in two groups, one group of heat dissipation holes is located on the outer surface and the back surface of the shell, and the other group of heat dissipation holes is located on the front and back sides of the inner wall of the shell, and the two groups of heat dissipation holes are arranged alternately.

5. The novel square aluminum shell for secondary battery according to claim 1, characterized in that: The two installation blocks are arranged in an L shape, and a bolt hole penetrates through one side of the installation block.

6. A novel square aluminum shell for secondary batteries according to claim 1, characterized in that: The plurality of partition plates are equidistantly distributed, the spacing between the plurality of partition plates is slightly larger than the width of the lithium battery, and the height of the plurality of partition plates is consistent with the depth of the shell.

7. According to claim 1, a novel square aluminum shell for secondary battery, characterized in that: A plurality of elastic airbags are arranged from top to bottom, and the widths of the plurality of elastic airbags are gradually shortened from top to bottom.

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