Shell structure with ventilation function and battery pack

Abstract

The utility model provides a shell structure with a ventilation function and a battery pack. The shell structure comprises a shell body, a ventilation pipe and a protective cap, the shell body is provided with a vent hole, the vent pipe is detachably connected to the shell body, one end of the vent pipe is communicated with the vent hole, a breathable film is arranged in the vent pipe, the protective cap is detachably connected to the other end of the vent pipe, and the protective cap is provided with a vent hole used for communicating the vent pipe with the outside. According to the shell structure with the ventilation function, one end of the ventilation pipe is detachably connected with the shell body, the other end of the ventilation pipe is detachably connected with the protective cap, and the ventilation film is arranged in the ventilation pipe, so that when the ventilation film is damaged, the ventilation pipe can be directly replaced, and compared with a traditional shell replacement scheme, the shell structure with the ventilation function is more convenient to replace. The maintenance convenience of the breathable film is improved, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, and in particular to a shell structure with a ventilation function. At the same time, the utility model also relates to a battery pack provided with the shell structure. Background Art

[0002] The main power source for automobile start-stop is lead-acid battery, but lead-acid battery is easy to cause environmental pollution, heavy weight and low energy density. With the rise of new energy vehicles, new batteries such as lithium batteries are developing rapidly. Compared with lead-acid batteries, they are lighter, have higher energy density and longer life. The development of lithium auxiliary power source has begun to attract the attention of the battery industry.

[0003] In order to improve the performance of lithium batteries, a breathable membrane is usually provided on the housing. The breathable membrane is specifically a waterproof breathable membrane to connect the inside and outside of the battery pack, which is beneficial for decompression inside the battery pack and also helps prevent external moisture from entering the battery pack. At present, the breathable membrane is generally arranged in an integral injection molding arrangement with the upper housing of the battery pack. In this way, when the breathable membrane is damaged and needs to be replaced, the upper housing needs to be replaced, resulting in high maintenance costs for the breathable membrane and waste of resources. Utility Model Content

[0004] In view of this, the utility model aims to provide a shell structure with a ventilation function to reduce the maintenance cost of the breathable membrane.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] A shell structure with ventilation function comprises a shell body, a ventilation pipe and a protective cap; the shell body is provided with a ventilation port, the ventilation pipe is detachably connected to the shell body, and one end of the ventilation pipe is communicated with the ventilation port, a breathable membrane is provided in the ventilation pipe, the protective cap is detachably connected to the other end of the ventilation pipe, and the protective cap is provided with a ventilation hole for connecting the ventilation pipe with the outside.

[0007] Furthermore, a mounting protrusion is provided on the inner peripheral wall of the ventilation pipe and is convex inwardly arranged along the inner peripheral wall of the ventilation pipe, and the breathable membrane is arranged on one side of the mounting protrusion.

[0008] Furthermore, relative to the mounting protrusion, a pressure ring is provided on the other side of the breathable membrane.

[0009] Furthermore, the pressure ring and the breathable membrane are connected by welding; and / or the breathable membrane and the mounting protrusion are connected by welding.

[0010] Further, the vent pipe is threadedly connected to the vent; and / or,

[0011] The protective cap is connected with the vent pipe by clamping.

[0012] Furthermore, the outer peripheral wall of the ventilation pipe is provided with a clamping protrusion which is radially protruding outward, and the inner peripheral wall of the protective cap is provided with a matching protrusion which is radially protruding outward, and a limiting protrusion which is spaced apart from the matching protrusion;

[0013] When the clamping protrusion is clamped and connected with the matching protrusion, the limiting protrusion abuts against the end surface of the ventilation pipe.

[0014] Furthermore, the outer peripheral wall of the ventilation pipe is provided with a radially outwardly protruding abutment protrusion, and the abutment protrusion is used to abut against the shell body to limit the displacement of the ventilation pipe toward the shell body.

[0015] Furthermore, a sealing member is provided between the abutting protrusion and the shell body to form a seal therebetween.

[0016] Furthermore, there are a plurality of ventilation holes, and the plurality of ventilation holes are arranged on the peripheral wall of the protective cap at intervals along the circumferential direction of the protective cap.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] The shell structure with ventilation function described in the utility model is detachably connected to the shell body through one end of the ventilation tube, and detachably connected to the protective cap at the other end, and the ventilation membrane is arranged in the ventilation tube. When the ventilation membrane is damaged, the ventilation tube can be directly replaced. Compared with the traditional solution of replacing the shell, it is beneficial to improve the convenience of ventilation membrane maintenance and reduce maintenance costs.

[0019] In addition, the mounting protrusion has a simple structure, is easy to process and shape, and is convenient for installing the breathable membrane in the breathable tube. By arranging a pressure ring on the breathable membrane that is arranged opposite to the mounting protrusion, it is beneficial to improve the fixing effect of the breathable membrane in the ventilation tube, thereby improving the stability of the breathable membrane in use. The pressure ring and the breathable membrane are welded together, which is beneficial to ensure the connection strength between the two; the breathable membrane is welded to the mounting protrusion, which is also beneficial to improve the connection strength of the breathable membrane on the mounting protrusion.

[0020] In addition, the vent pipe is screwed to the vent port, which is easy to operate, thereby facilitating the installation of the vent pipe, and the protective cap is snap-connected to the vent pipe, which is conducive to improving the convenience of installing the protective cap. The provision of snap-fitting protrusions, matching protrusions and limiting protrusions is conducive to improving the snap-fitting effect of the protective cap on the vent pipe, and the structure is simple and the use effect is good. The provision of the abutting protrusion is conducive to limiting the displacement of the vent pipe during the installation process, and the structure is simple, which is conducive to processing and forming. The seal between the abutting protrusion and the shell body is conducive to improving the sealing between the two, thereby improving the sealing effect of the shell body during use. By providing a plurality of vent holes, and arranging them on the peripheral wall of the protective cap at intervals along the circumference of the protective cap, it is not only conducive to improving the ventilation effect, but also conducive to improving the protective effect of the breathable membrane.

[0021] In addition, another object of the present invention is to provide a battery pack, on which is provided a shell structure with a ventilation function as described above.

[0022] The battery pack of the present invention is advantageous for improving the maintenance convenience and safety of the battery pack by providing the shell structure with ventilation function as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0024] Figure 1 This is a disassembled diagram of the housing structure described in the embodiment of the utility model;

[0025] Figure 2 This is a schematic structural diagram of the housing structure described in an embodiment of the utility model;

[0026] Figure 3 for Figure 2 A top view of the

[0027] Figure 4 for Figure 3 AA direction section view;

[0028] Figure 5 This is a schematic diagram of the structure of the ventilation pipe according to an embodiment of the utility model;

[0029] Figure 6 It is a schematic structural diagram of the protective cap described in an embodiment of the utility model.

[0030] Description of reference numerals:

[0031] 1. Shell body; 2. Ventilation pipe; 3. Protective cap; 4. Breathable membrane; 5. Sealing ring;

[0032] 101, vent;

[0033] 201, abutting protrusion; 202, clamping protrusion; 203, mounting protrusion;

[0034] 301, vent hole; 302, limiting protrusion; 303, matching protrusion;

[0035] 401. Pressure ring. DETAILED DESCRIPTION

[0036] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0037] In the description of the present invention, it should be noted that if there are terms indicating orientation or positional relationship such as "upper", "lower", "inner", "back", etc., they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first", "second", etc., they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0038] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0039] This embodiment relates to a housing structure with a ventilation function, which improves the maintenance convenience of the breathable membrane 4 and helps reduce the maintenance cost by optimizing its own structure.

[0040] In terms of overall structure, the shell structure includes a shell body 1, a vent pipe 2 and a protective cap 3. The shell body 1 is provided with a vent 101, the vent pipe 2 is detachably connected to the shell body 1, and one end of the vent pipe 2 is connected to the vent 101, a breathable membrane 4 is provided inside the vent pipe 2, the protective cap 3 is detachably connected to the other end of the vent pipe 2, and the protective cap 3 is provided with a vent hole 301 for connecting the vent pipe 2 with the outside.

[0041] The shell structure with ventilation function described in this embodiment is detachably connected to the shell body 1 through one end of the ventilation tube 2, and detachably connected to the protective cap 3 through the other end, and the ventilation membrane 4 is arranged in the ventilation tube 2. When the ventilation membrane 4 is damaged, the ventilation tube 2 can be directly replaced. Compared with the traditional solution of replacing the shell, it is beneficial to improve the convenience of maintenance of the ventilation membrane 4 and reduce the maintenance cost.

[0042] Based on the above overall introduction, an exemplary structure of the housing structure with ventilation function described in this embodiment is as follows: Figures 1 to 4As shown in the figure, the shell body 1 here can be the upper shell of the battery pack, or it can be the shell structure of other products with ventilation requirements. The breathable membrane 4 can specifically adopt the waterproof breathable membrane 4 in the prior art to connect the inside and outside of the shell body 1, and also help prevent water vapor from flowing into the shell and affecting the performance.

[0043] As a preferred embodiment, Figure 4 and Figure 5 As shown in FIG. 1 , the inner peripheral wall of the vent pipe 2 is provided with a mounting protrusion 203 which is convex inwardly convex along its own radial direction, and the breathable membrane 4 is provided on one side of the mounting protrusion 203. Here, the mounting protrusion 203 has a simple structure, is easy to process and form, and is convenient for the installation of the breathable membrane 4 in the vent pipe. Figure 1 As shown in , the mounting protrusion 203 is arranged close to one end of the vent pipe 2 connected to the vent 101 , and the breathable membrane 4 is specifically located on a side of the mounting protrusion 203 facing the vent 101 .

[0044] In this embodiment, the breathable membrane 4 is connected to the mounting protrusion 203 by welding. In specific implementation, the edges of the breathable membrane 4 are connected to the mounting protrusion 203 by laser welding. This is not only convenient for implementation, but also helps to improve the connection strength between the breathable membrane 4 and the mounting protrusion 203, as well as the stability during use. It should be noted that the breathable membrane 4 can also be set on the other side of the mounting protrusion 203, which can be set according to the use requirements in specific implementation.

[0045] To improve the installation firmness of the breathable membrane 4, Figure 4 and Figure 5 As shown in the figure, a pressure ring 401 is provided on the other side of the breathable membrane 4 relative to the mounting protrusion 203. The pressure ring 401 is annular and connected to the edge of the breathable membrane 4, so that the breathable membrane 4 is fixed between the pressure ring 401 and the mounting protrusion 203, which is conducive to further improving the installation firmness of the breathable membrane 4. Here, the pressure ring 401 and the breathable membrane 4 are welded and connected. In specific implementation, the two are connected by laser welding, which is convenient for implementation and has good connection strength.

[0046] In this embodiment, the area of ​​the breathable membrane 4 is larger than the area of ​​the inner cross section of the vent pipe 2. Thus, after the mounting protrusion 203 and the breathable membrane 4 are welded together, when exhaust is required to the outside of the shell body 1, the welding area on the mounting protrusion 203 will press against the breathable membrane 4. When air is required to be introduced into the shell body 1, the pressure ring 401 restricts the breathable membrane 4, thereby preventing the breathable membrane 4 from being pushed open. During specific installation, the breathable membrane 4 is first placed on the mounting protrusion 203 and then welded together, and then the pressure ring 401 is placed, and the pressure ring 401 and the breathable membrane 4 are welded together. With such a configuration, when the internal and external air pressures are adjusted, both sides of the breathable membrane 4 are constrained, so that it is not easy to detach from the vent pipe 2, thereby making the breathable membrane 4 have better stability.

[0047] As a preferred embodiment, the vent pipe 2 is screwed to the vent port 101, which is easy to operate and thus facilitates the installation of the vent pipe 2. Here, an external thread is provided on the outer peripheral surface of the end of the vent pipe 2, and an internal thread is provided on the inner peripheral wall of the communication port, which is conducive to the screw connection of the vent pipe 2 at the vent port 101. Of course, in addition to the screw connection between the vent pipe 2 and the vent hole 301, other connection methods can also be used as long as the use requirements are met.

[0048] like Figure 4 and Figure 5 As shown in , the outer peripheral wall of the vent pipe 2 is provided with a radially outwardly protruding abutment protrusion 201, and the abutment protrusion 201 is used to abut against the shell body 1 to limit the displacement of the vent pipe 2 toward the shell body 1. The abutment protrusion 201 is preferably annular to have a better limiting effect. Here, the abutment protrusion 201 is conducive to limiting the displacement of the vent pipe 2 during the installation process, and the structure is simple, which is conducive to processing and forming. Furthermore, a sealing member for forming a seal between the abutment protrusion 201 and the shell body 1 is provided. The sealing member is conducive to improving the sealing between the two, thereby improving the sealing effect of the shell body 1 during use.

[0049] When implementing it, Figure 4 As shown in , the sealing member can be a sealing ring 5. To facilitate the installation effect of the sealing ring 5, an annular installation groove can be provided on the side of the abutting protrusion 201 facing the shell body 1. The sealing ring 5 can be arranged in the installation groove and sandwiched between the abutting protrusion 201 and the shell body 1. Here, the sealing ring 5 has a simple structure, is easy to arrange and implement, and has a good sealing effect.

[0050] As a preferred embodiment, Figure 6 As shown in the figure, there are multiple vent holes 301, and the multiple vent holes 301 are arranged on the peripheral wall of the protective cap 3 at intervals along the circumference of the protective cap 3. By providing multiple vent holes 301, and arranging them on the peripheral wall of the protective cap 3 at intervals along the circumference of the protective cap 3, it is not only beneficial to improve the ventilation effect, but also beneficial to improve the protective effect of the breathable membrane 4. Here, the protective cap 3 has a simple structure, is easy to process and shape, and has a good ventilation effect.

[0051] In addition, the protective cap 3 in this embodiment is preferably connected to the vent pipe 2 by snapping, so as to improve the convenience of installing the protective cap 3. Figures 4 to 6 As shown in the figure, the outer peripheral wall of the vent pipe 2 is provided with a radially outwardly convex clamping protrusion 202, the inner peripheral wall of the protective cap 3 is provided with a radially outwardly convex matching protrusion 303, and a limiting protrusion 302 spaced from the matching protrusion 303. When the clamping protrusion 202 is clamped and connected with the matching protrusion 303, the limiting protrusion 302 abuts against the end surface of the vent pipe 2.

[0052] During specific installation, the protective cap 3 is sleeved on the vent pipe 2, and as the matching protrusion 303 passes over the snap-on protrusion 202, the snap-on connection between the two can be achieved, and the outer end of the vent pipe 2 abuts against the limiting protrusion 302. The above-mentioned multiple vent holes 301 are located on one side of the vent pipe 2 where the limiting protrusion 302 is located, which is conducive to further improving the protective effect of the protective cap 3. Here, the setting of the snap-on protrusion 202, the matching protrusion 303 and the limiting protrusion 302 is conducive to improving the snap-on effect of the protective cap 3 on the vent pipe 2, and the structure is simple and the use effect is good. Preferably, the snap-on protrusion 202, the matching protrusion 303 and the limiting protrusion 302 are all annular, which is conducive to further improving the snap-on effect of the protective cap 3 on the vent pipe 2.

[0053] In this embodiment, the heights of the snap-fit ​​protrusion 202 and the mating protrusion 303 do not need to be set too high. With such a setting, when the pressure inside the shell body 1 exceeds a preset pressure value, the mating protrusion 303 can be released from the snap-fit ​​protrusion 202 and then detached from the vent pipe 2, thereby increasing the ventilation volume of the vent pipe 2, which in turn helps to improve the safety of the shell structure.

[0054] The shell structure in this embodiment, by optimizing its own structure, not only has a ventilation function, but also can prevent sharp objects from entering and damaging the breathable membrane 4. Moreover, when thermal runaway occurs, the protective top can be opened to increase the air permeability and the pressure relief capacity, which has good practicality.

[0055] In addition, the present embodiment also relates to a battery pack, on which is provided a shell structure having a ventilation function as described above.

[0056] The battery pack of this embodiment is provided with a housing structure with ventilation function as described above, which helps to improve the maintenance convenience and safety of the battery pack.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A housing structure with ventilation function, characterized in that: Including shell body, vent pipe and protective cap; The shell body is provided with a vent, the vent pipe is detachably connected to the shell body, and one end of the vent pipe is communicated with the vent, a breathable membrane is provided inside the vent pipe, the protective cap is detachably connected to the other end of the vent pipe, and the protective cap is provided with a vent hole for connecting the vent pipe with the outside.

2. The housing structure with ventilation function according to claim 1, characterized in that: The inner peripheral wall of the ventilation pipe is provided with a mounting protrusion which is convex inwardly arranged along the inner peripheral wall of the ventilation pipe, and the breathable membrane is arranged on one side of the mounting protrusion.

3. The housing structure with ventilation function according to claim 2, characterized in that: Relative to the mounting protrusion, a pressure ring is provided on the other side of the breathable membrane.

4. The housing structure with ventilation function according to claim 3, characterized in that: The pressure ring and the breathable membrane are connected by welding; and / or the breathable membrane and the mounting protrusion are connected by welding.

5. The housing structure with ventilation function according to claim 1, characterized in that: The vent pipe is threadedly connected to the vent; and / or, The protective cap is connected with the vent pipe by clamping.

6. The housing structure with ventilation function according to claim 5, characterized in that: The outer peripheral wall of the ventilation pipe is provided with a clamping protrusion which is radially protruding outward, and the inner peripheral wall of the protective cap is provided with a matching protrusion which is radially protruding outward, and a limiting protrusion which is spaced apart from the matching protrusion; When the clamping protrusion is clamped and connected with the matching protrusion, the limiting protrusion abuts against the end surface of the ventilation pipe.

7. The housing structure with ventilation function according to claim 1, characterized in that: The outer peripheral wall of the ventilation pipe is provided with a radially outwardly protruding abutting protrusion, and the abutting protrusion is used to abut against the shell body to limit the displacement of the ventilation pipe toward the shell body.

8. The housing structure with ventilation function according to claim 7, characterized in that: A sealing member is provided between the abutting protrusion and the shell body for forming a seal therebetween.

9. The housing structure with ventilation function according to any one of claims 1 to 8, characterized in that: There are a plurality of vent holes, which are arranged on the peripheral wall of the protective cap at intervals along the circumferential direction of the protective cap.

10. A battery pack, characterized in that: The battery pack is provided with a shell structure with ventilation function as described in any one of claims 1 to 9.

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