A battery box sealing structure

Abstract

The present invention relates to the technical field of battery box sealing, and discloses a battery box sealing structure, including a new type of sealing ring, a box body, a tray, and a battery. The new type of sealing ring is fixedly installed at the bottom of the side wall of the box body. The bottom of the battery is in contact with the top of the tray, the top of the battery is not in contact with the top of the inner cavity of the box body, and the bottom of the box body is snap-connected with the top of the tray. In this battery box sealing structure, the T-shaped groove and the upper edge of the new type of sealing ring are snap-connected to prevent the new type of sealing ring from detaching from the box body during the up and down movement of the box body, thereby preventing the sealing effect of the new type of sealing ring on the sealing structure from being affected after the new type of sealing ring detaches from the box body. The sealing structure can be applied to both positive pressure and negative pressure conditions to maintain the sealing of the new type of sealing ring on the sealing structure through the communication between a plurality of ventilation holes and the inflation groove on the new type of sealing ring.

Description

Technical Field

[0001] The present invention relates to the technical field of battery box sealing, and particularly to a sealing structure for a battery box body. Background Art

[0002] With the continuous consumption of non-renewable energy, non-renewable energy is becoming increasingly scarce. Countries around the world are accelerating the development of new energy. Among them, the lithium battery industry has advanced by leaps and bounds. However, the manufacturing process of lithium batteries is complex and numerous, and the efficiency is limited and difficult to meet the demand. For example, in cylindrical batteries in lithium batteries, in one of the processes, the injection process, the battery needs to be statically placed for absorption, and the static time period is long. How to improve the absorption efficiency of the battery is extremely urgent.

[0003] In the prior art, generally vacuum static placement is adopted, and the box for placing the battery is evacuated to enable the electrolyte inside the battery to be quickly absorbed. This method can improve the absorption efficiency of the battery. However, for some batteries with tightly packed battery cores, the vacuum static placement also takes too long. Therefore, a method of adding positive pressure on the basis of vacuum static placement is needed to improve the absorption efficiency of the electrolyte. Therefore, a new sealing structure and a new sealing ring are needed to ensure that the box body does not leak during the process of vacuum -95Kpa and positive pressure 0 - 0.4Mpa, so that the electrolyte inside the battery will not be affected during the rapid absorption process. Summary of the Invention

[0004] The present invention provides a sealing structure for a battery box body, which has the advantages of improving the absorption efficiency of the electrolyte inside the battery and ensuring that the box body does not leak during the absorption process of the electrolyte, and solves the problems of slow absorption rate of the electrolyte for batteries with tightly packed battery cores and poor sealing effect by the traditional vacuum static placement method.

[0005] The present invention provides the following technical solution: A sealing structure for a battery box body includes a new sealing ring, a box body, a tray, and a battery. The new sealing ring is fixedly installed at the bottom of the side wall of the box body. The bottom of the battery is in contact with the top of the tray. The top of the battery is not in contact with the top of the inner cavity of the box body. The bottom of the box body is snap-fitted with the top of the tray. The bottom of the new sealing ring is in contact with the tray.

[0006] Preferably, the bottom of the new sealing ring is provided with a first sealing surface and a second sealing surface. The side surface of the new sealing ring is provided with an inflation groove. The top of the new sealing ring is provided with an upper edge.

[0007] Preferably, the shape of the longitudinal section of the first sealing surface is different from the shape of the longitudinal section of the second sealing surface. The second sealing surface is located directly below the inflation groove.

[0008] Preferably, the side wall of the box body is provided with a T-shaped groove that is snap-fitted with the new sealing ring. The new sealing ring is snap-fitted with the T-shaped groove through the upper edge.

[0009] Preferably, ventilation holes are provided on the side wall of the box body, and the right side of the ventilation holes is communicated with the inner cavity of the box body.

[0010] Preferably, the number of the ventilation holes is several, and the inflation grooves on the new sealing ring are communicated with the inner cavity of the box body through the ventilation holes.

[0011] Preferably, the bottom of the new sealing ring contacts the tray through the first sealing surface and the second sealing surface.

[0012] Preferably, a sealed space is formed among the box body, the tray and the new sealing ring.

[0013] The present invention has the following beneficial effects:

[0014] 1. For the battery box body sealing structure, the upper edges of the T-shaped grooves and the new sealing ring are clamped with each other, so that the new sealing ring will not be separated from the box body during the up and down movement of the box body, thereby preventing the influence on the sealing effect of the sealing structure caused by the separation of the new sealing ring from the box body. The sealing structure can be applicable to both positive pressure and negative pressure conditions and can keep the new sealing ring form a seal for the sealing structure through the connection of several ventilation holes and the inflation grooves on the new sealing ring.

[0015] 2. For the battery box body sealing structure, when the inside of the box body is evacuated to form a negative pressure through the first sealing surface of the new sealing ring, the first sealing surface will be deformed under the action of the external pressure, so that the first sealing surface is tightly attached to the tray, thereby ensuring that the internal gas of the box body will not leak and ensuring that the absorption effect of the battery on the electrolyte remains stable.

[0016] 3. For the battery box body sealing structure, when the inside of the box body forms a positive pressure through the first sealing surface and the second sealing surface, the pressure inside the box body is greater than the pressure outside. The pressure inside the box body acts on the inflation groove through the ventilation hole, so that the inflation groove is partially opened, and then the first sealing surface and the second sealing surface are tightly connected to the tray, so that the sealing structure remains sealed under positive pressure. When the positive pressure inside the box body continues to increase, the opening of the inflation groove continues to increase, and then the force between the second sealing surface and the tray is greater, so that the new sealing ring can still maintain the sealing effect of the device under large positive pressure, and the sealing effect under positive pressure is better than that of the O-ring, thereby ensuring the effect of improving the absorption efficiency of the electrolyte for the battery with a large cell density under positive pressure. Description of the Drawings

[0017] Figure 1 It is a new cross-sectional view of the structure of the present invention;

[0018] Figure 2Schematic diagram of the novel sealing ring of the present invention structure.

[0019] In the figure: 1. Novel sealing ring; 11. Inflatable groove; 12. First sealing surface; 13. Second sealing surface; 14. Upper edge; 2. Box body; 21. T-shaped groove; 22. Vent hole; 3. Tray; 4. Battery. Specific implementation mode

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. The accompanying drawings in the embodiments of the present invention: Different types of hatching lines in the figure are not marked according to the national standard, nor are the materials of the components required. It is to distinguish the sectional views of the components in the figure.

[0021] Please refer to Figure 1-2, A battery box sealing structure, including a new type of sealing ring 1, a box body 2, a tray 3, and a battery 4. The new type of sealing ring 1 is fixedly installed at the bottom of the side wall of the box body 2. The bottom of the new type of sealing ring 1 is provided with a first sealing surface 12 and a second sealing surface 13. The side surface of the new type of sealing ring 1 is provided with an inflation groove 11. The top of the new type of sealing ring 1 is provided with an upper edge 14. The shape of the longitudinal section of the first sealing surface 12 is different from the shape of the longitudinal section of the second sealing surface 13. The second sealing surface 13 is located directly below the inflation groove 11. When a vacuum is drawn inside the box body 2 through the first sealing surface 12 of the new type of sealing ring 1 and a negative pressure is formed inside the box body 2, the first sealing surface 12 is deformed under the action of external pressure, so that the first sealing surface 12 tightly fits with the tray 3, thereby ensuring that the internal gas of the box body 2 will not leak and ensuring that the absorption effect of the battery on the electrolyte remains stable. When a positive pressure is formed inside the box body 2 through the first sealing surface 12 and the second sealing surface 13, the pressure inside the box body 2 is greater than the pressure outside. The pressure inside the box body 2 acts on the inflation groove 11 through the ventilation hole 22, causing the inflation groove 11 to open partially, so that the first sealing surface 12 and the second sealing surface 13 are tightly connected to the tray 3, making the sealing structure remain sealed under positive pressure. When the positive pressure inside the box body 2 continues to increase, the opening of the inflation groove 11 continues to increase, so that the force between the second sealing surface 13 and the tray 3 is greater, enabling the new type of sealing ring 1 to still maintain the sealing effect of the device under large positive pressure, and the sealing effect under positive pressure is better than that of an O-ring, thereby ensuring the effect of improving the absorption efficiency of the electrolyte for a battery with a large cell density under positive pressure. The side wall of the box body 2 is provided with a T-shaped groove 21 that is engaged with the new type of sealing ring 1. The new type of sealing ring 1 is engaged with the T-shaped groove 21 through the upper edge 14. By the mutual engagement of the T-shaped groove 21 and the upper edge 14 on the new type of sealing ring 1, the new type of sealing ring 1 will not be separated from the box body 2 during the up and down movement of the box body 2, thereby preventing the separation of the new type of sealing ring 1 from the box body 2 from affecting the sealing effect of the new type of sealing ring 1 on the sealing structure. The side wall of the box body 2 is provided with ventilation holes 22. The right side of the ventilation holes 22 is connected to the inner cavity of the box body 2. The number of ventilation holes 22 is several. The inflation groove 11 on the new type of sealing ring 1 is connected to the inner cavity of the box body 2 through the ventilation holes 22. By connecting the several ventilation holes 22 with the inflation groove 11 on the new type of sealing ring 1, the sealing structure can be applicable to both positive pressure and negative pressure conditions and can maintain the sealing of the new type of sealing ring 1 to the sealing structure. The bottom of the battery 4 is in contact with the top of the tray 3. The top of the battery 4 is not in contact with the top of the inner cavity of the box body 2. The bottom of the box body 2 is engaged with the top of the tray 3. The bottom of the new type of sealing ring 1 is in contact with the tray 3. The bottom of the new type of sealing ring 1 is in contact with the tray 3 through the first sealing surface 12 and the second sealing surface 13. A closed space is formed among the box body 2, the tray 3, and the new type of sealing ring 1.

[0022] Working principle: when a negative pressure is applied to the box body 2, the first sealing surface 12 deforms under the action of the external pressure, so that the first sealing surface 12 fits tightly with the tray 3, ensuring the sealing state inside the box body 2. When a positive pressure is applied inside the box body 2, the pressure inside the box body 2 acts on the inflatable groove 11 through the ventilation hole 22, thereby causing the inflatable groove 11 to open partially, so that both the bottom of the first sealing surface 12 and the second sealing surface 13 fit with the tray 3, ensuring the sealing inside the box body 2. When the positive pressure inside the box body 2 continues to increase, the inflatable groove 11 is completely opened, causing the first sealing surface 12 to separate from the tray 3. At this time, the adhesion force between the second sealing surface 13 and the tray 3 is greater, so that the sealing structure can maintain a better sealing effect under a large positive pressure.

[0023] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. At the same time, in the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is 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 construed as a limitation of the present invention.

[0024] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A battery box sealing structure, comprising a sealing ring (1), a box body (2), a tray (3), and a battery (4). It is characterized in that: The sealing ring (1) is fixedly installed at the bottom of the side wall of the box body (2). The bottom of the battery (4) is in contact with the top of the tray (3). The top of the battery (4) is not in contact with the top of the inner cavity of the box body (2). The bottom of the box body (2) is snap-fitted with the top of the tray (3). The bottom of the sealing ring (1) is in contact with the tray (3). The bottom of the sealing ring (1) is provided with a first sealing surface (12) and a second sealing surface (13). The side surface of the sealing ring (1) is provided with an inflation groove (11). The top of the sealing ring (1) is provided with an upper edge (14). The side wall of the box body (2) is provided with a T-shaped groove (21) that is snap-fitted with the sealing ring (1). The sealing ring (1) is snap-fitted with the T-shaped groove (21) through the upper edge (14). The side wall of the box body (2) is provided with a ventilation hole (22). The right side of the ventilation hole (22) is communicated with the inner cavity of the box body (2). The inflation groove (11) on the sealing ring (1) is communicated with the inner cavity of the box body (2) through the ventilation hole (22). When a negative pressure is applied to the box body (2), the first sealing surface (12) deforms under the action of the external pressure, so that the first sealing surface (12) tightly fits with the tray (3), ensuring the sealing state inside the box body (2). When a positive pressure is applied inside the box body (2), the pressure inside the box body (2) acts on the inflation groove (11) through the ventilation hole (22), and then the inflation groove (11) is partially opened, so that the bottoms of the first sealing surface (12) and the second sealing surface (13) are both in contact with the tray (3).

2. A battery box sealing structure according to claim 1, It is characterized in that: The shape of the longitudinal section of the first sealing surface (12) is different from the shape of the longitudinal section of the second sealing surface (13). The second sealing surface (13) is located directly below the inflation groove (11).

3. A battery box sealing structure according to claim 1, It is characterized in that: The number of the ventilation holes (22) is several.

4. A battery box sealing structure according to claim 1, It is characterized in that: The bottom of the sealing ring (1) is in contact with the tray (3) through the first sealing surface (12) and the second sealing surface (13).

5. A battery box sealing structure according to claim 1, It is characterized in that: A closed space is formed among the box body (2), the tray (3), and the sealing ring (1).

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