Anti-explosion liquid injection sealing structure, battery top cover assembly and single battery

Abstract

The utility model belongs to the technical field of batteries, and discloses an anti-explosion liquid injection sealing structure, a battery top cover assembly and a single battery, the anti-explosion liquid injection sealing structure comprises a mounting groove, an anti-explosion sealing piece and at least two liquid injection holes arranged at intervals; wherein the mounting groove is formed in the top cover piece; at least two liquid injection holes arranged at intervals are formed in the groove bottom of the mounting groove; the anti-explosion sealing element is arranged in the mounting groove in a sealing manner and covers the liquid injection hole in a sealing manner; and the explosion-proof sealing element is provided with a gas storage space which is used for concentrating gas in the battery. According to the anti-explosion liquid injection sealing structure, an anti-explosion structure and a liquid injection structure can be integrated, so that the space utilization rate of the battery top cover assembly is improved, meanwhile, the liquid injection efficiency of the single battery is improved, and the anti-explosion pressure relief effect of the battery is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to an explosion-proof liquid injection sealing structure, a battery top cover assembly and a single battery. Background Art

[0002] With the continuous development of the new energy industry, the production and consumption of batteries are gradually increasing, and the requirements for batteries are also gradually increasing. As one of the main components of the battery, the battery top cover assembly has increasingly higher requirements for its explosion-proof structure, liquid injection structure, and terminal structure.

[0003] The existing battery top cover assembly includes a top cover piece, a pole assembly, a liquid injection structure and an explosion-proof structure. The liquid injection structure and the explosion-proof structure are independently arranged on the top cover, which makes the space utilization rate of the battery top cover assembly low. This also causes a certain limitation on the size of the liquid injection structure, which in turn leads to low liquid injection efficiency.

[0004] Therefore, there is an urgent need for a battery top cover assembly and a single battery to solve the above technical problems. Utility Model Content

[0005] One purpose of the present utility model is to provide an explosion-proof liquid injection sealing structure, a battery top cover assembly and a single battery, which can integrate the explosion-proof structure and the liquid injection structure into one, thereby improving their space utilization, while improving the liquid injection efficiency and ensuring their own explosion-proof pressure relief effect.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] The explosion-proof liquid injection sealing structure is provided on the top cover of the battery top cover assembly. The above-mentioned explosion-proof liquid injection sealing structure includes:

[0008] A mounting slot is provided on the top cover;

[0009] At least two spaced-apart injection holes are provided at the bottom of the mounting groove;

[0010] The explosion-proof seal is sealed in the installation groove and seals the injection hole. The explosion-proof seal is provided with a gas storage space, which is used to collect the gas inside the battery.

[0011] Optionally, the explosion-proof seal includes an explosion-proof plate and an annular support foot, the annular support foot is arranged on the side of the explosion-proof plate facing the installation groove, the annular support foot is sealed with the installation groove, and the explosion-proof plate, the annular support foot and the bottom of the installation groove enclose an air storage space.

[0012] Optionally, the explosion-proof liquid injection sealing structure further includes an explosion-proof membrane, and the explosion-proof membrane cover is arranged on the installation groove.

[0013] Optionally, the explosion-proof membrane and the explosion-proof seal are both provided with notches, so that the explosion-proof membrane and the explosion-proof seal rupture along their own notches.

[0014] Optionally, the explosion-proof seal and the installation groove are welded, riveted or snap-fitted.

[0015] Optionally, an annular protrusion is provided on one side of the installation groove extending toward the top cover, and the annular protrusion is used to bend to buckle with the explosion-proof sealing component.

[0016] Optionally, a sealing member is provided between the mounting groove and the explosion-proof sealing member and / or between the annular protrusion and the explosion-proof sealing member.

[0017] Optionally, a safety structure is provided at the bottom of the installation groove, and a tip is provided on the side of the safety structure facing the explosion-proof seal. The safety structure is configured to be deformed by heat to transport the tip to the explosion-proof seal and puncture the explosion-proof seal.

[0018] One purpose of the utility model is to provide a battery top cover assembly that can integrate an explosion-proof structure and a liquid injection structure into one, thereby improving its space utilization, while improving the liquid injection efficiency and ensuring its own explosion-proof and pressure relief effect.

[0019] To achieve this purpose, the present invention adopts the following technical solutions:

[0020] The battery top cover assembly comprises a top cover member, a pole assembly and the above-mentioned explosion-proof liquid injection sealing structure. The above-mentioned pole assembly and the above-mentioned explosion-proof liquid injection sealing structure are both arranged on the above-mentioned top cover member.

[0021] One purpose of the utility model is to provide a single battery that can integrate an explosion-proof structure and a liquid injection structure into one, thereby improving its space utilization, while improving the liquid injection efficiency and ensuring its own explosion-proof and pressure relief effect.

[0022] To achieve this purpose, the present invention adopts the following technical solutions:

[0023] The single battery comprises a shell, a battery cell and the battery top cover assembly. The battery cell is arranged in the shell, and the battery top cover assembly is sealed at the opening of the shell.

[0024] Beneficial effects of the utility model:

[0025] The utility model provides an explosion-proof liquid injection sealing structure, a battery top cover assembly and a single battery. By integrating the explosion-proof structure and the sealing structure into one, the space occupied by the explosion-proof liquid injection sealing structure is reduced. At the same time, the number of liquid injection holes is increased, and the liquid injection efficiency of the single battery using the explosion-proof liquid injection sealing structure is improved. The liquid injection holes also serve as exhaust holes to connect the internal space of the single battery with the gas storage space of the explosion-proof structure. When the gas in the internal space of the single battery rises sharply and accumulates in the gas storage space, the explosion-proof sealing component ruptures to relieve pressure and exhaust, thereby ensuring the pressure relief and explosion-proof effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is an axonometric view of a battery top cover assembly provided by a specific embodiment of the present utility model;

[0027] Figure 2 This is an exploded view of a portion of the battery top cover assembly structure provided by a specific embodiment of the present utility model;

[0028] Figure 3 It is a cross-sectional view of a battery top cover assembly provided by a specific embodiment of the present utility model;

[0029] Figure 4 yes Figure 3 A partial enlarged view of point A in the middle;

[0030] Figure 5 It is an axonometric view of the explosion-proof seal provided by the specific embodiment of the utility model;

[0031] Figure 6 It is an axonometric view of the explosion-proof membrane provided by the specific embodiment of the utility model;

[0032] Figure 7 yes Figure 4 A partial enlarged view of point B in the middle.

[0033] In the picture:

[0034] 10. Mounting groove; 11. Annular protrusion;

[0035] 20. Liquid injection hole;

[0036] 30. Explosion-proof seal; 301. Gas storage space; 31. Explosion-proof disk; 32. Ring support foot; 33. First notch;

[0037] 40. Explosion-proof membrane; 41. Second notch;

[0038] 50. Seals;

[0039] 60. Safety structure; 61. Tip;

[0040] 200. Top cover; 300. Pole assembly. DETAILED DESCRIPTION

[0041] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0042] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0043] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0044] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0045] See below Figures 1 to 7 The specific implementation method is used to describe the explosion-proof liquid injection sealing structure of the utility model in detail.

[0046] This embodiment provides a single battery cell, comprising a housing, a battery cell, and the battery cover assembly described in this embodiment. The battery cell is disposed within the housing, and the battery cover assembly is sealably disposed at the opening of the housing. The use of the battery cover assembly of this embodiment improves the space utilization of the single battery cell, reduces the number of components, and simultaneously improves the liquid injection efficiency of the single battery cell while ensuring explosion-proof and pressure-relieving effects.

[0047] Please refer to Figures 1 to 3 Specifically, this embodiment further provides a battery top cover assembly, which includes a top cover member 200, a pole assembly 300, and the explosion-proof liquid injection sealing structure described in this embodiment. The pole assembly 300 and the explosion-proof liquid injection sealing structure are both provided on the top cover member 200. By integrating the explosion-proof structure and the liquid injection structure, not only is the space utilization of the battery top cover assembly improved, but the number of liquid injection holes 20 is increased, thereby improving the liquid injection efficiency.

[0048] Optionally, the number of the pole assemblies 300 can be adaptively set to one or two according to needs to achieve electrical connection between the single battery and the outside.

[0049] Please refer to Figure 3 and Figure 4 In this embodiment, the explosion-proof liquid injection sealing structure provided in this embodiment is arranged on the top cover member 200 of the battery top cover assembly to perform explosion-proof pressure relief and liquid injection on the single battery.

[0050] Specifically, the explosion-proof liquid injection sealing structure includes a mounting groove 10, an explosion-proof seal 30 and at least two injection holes 20 arranged at intervals; wherein, the mounting groove 10 is opened on the top cover 200; at least two injection holes 20 arranged at intervals are opened at the bottom of the mounting groove 10; the explosion-proof seal 30 is sealed in the mounting groove 10 and seals the injection holes 20; the explosion-proof seal 30 is provided with a gas storage space 301, which is used to concentrate the internal gas of the single battery.

[0051] The explosion-proof liquid injection sealing structure in this embodiment reduces the space occupied by the explosion-proof liquid injection sealing structure by integrating the explosion-proof structure and the sealing structure. At the same time, the number of injection holes 20 is increased, thereby improving the injection efficiency of the single cell using the explosion-proof liquid injection sealing structure. The injection hole 20 also serves as an exhaust hole to connect the internal space of the single cell with the gas storage space 301 of the explosion-proof structure. When the gas in the internal space of the single cell rises sharply and accumulates in the gas storage space 301, the explosion-proof seal 30 ruptures to relieve pressure and exhaust, thereby ensuring its pressure relief and explosion-proof effect.

[0052] Please refer to Figure 4 and Figure 5In this embodiment, the explosion-proof seal 30 includes an explosion-proof disc 31 and an annular support foot 32. The annular support foot 32 is arranged on the side of the explosion-proof disc 31 facing the mounting groove 10. The annular support foot 32 is sealed and connected to the mounting groove 10. This arrangement does not require the explosion-proof seal 30 to be directly attached to the liquid injection hole 20, so that the explosion-proof disc 31, the annular support foot 32 and the bottom of the mounting groove 10 enclose a gas storage space 301 for accumulating gas, which is convenient for the rupture and pressure relief of the explosion-proof disc 31.

[0053] Please refer to Figure 4 and Figure 6 Furthermore, the explosion-proof liquid injection sealing structure also includes an explosion-proof membrane 40, which is covered on the mounting groove 10. The setting of the explosion-proof membrane 40 not only has the effects of sealing and explosion-proof pressure relief, forming a secondary sealing and secondary explosion-proof pressure relief function, but also protects the explosion-proof seal 30 to prevent external gas, oil and other impurities from polluting or eroding the explosion-proof seal 30, thereby improving the reliability of the explosion-proof seal 30 and ensuring the pressure relief effect of the explosion-proof seal 30.

[0054] Optionally, the explosion-proof film 40 is made of a material with high transparency, low gas permeability, high and low temperature resistance, folding resistance, and impact resistance, so that the explosion-proof film 40 has a better protection effect.

[0055] Please refer to Figure 5 and Figure 6 In some embodiments, both the explosion-proof membrane 40 and the explosion-proof seal 30 are provided with notches so that the explosion-proof membrane 40 and the explosion-proof seal 30 rupture along their own notches. The setting of the notches makes the explosion-proof membrane 40 and the explosion-proof seal 30 have structural weaknesses, so that when the internal pressure of the single battery is too high, the explosion-proof seal 30 and the explosion-proof membrane 40 rupture and release pressure in advance.

[0056] Specifically, the explosion-proof plate 31 of the explosion-proof seal 30 is provided with a first notch 33 , and the explosion-proof membrane 40 is provided with a second notch 41 , so as to achieve the respective rupture and pressure relief functions of the two.

[0057] Optionally, the area of the first notch 33 is larger than the area of the second notch 41 to ensure that the first pressure relief line on the explosion-proof pressure relief air path is easier to break and relieve pressure, thereby ensuring good pressure relief and explosion-proof effect of the explosion-proof liquid injection sealing structure.

[0058] In some embodiments, the explosion-proof seal 30 and the mounting groove 10 are welded, riveted or snapped together, which can achieve the explosion-proof seal 30 being sealed and mounted on the top cover 200, further ensuring the sealing of the single battery.

[0059] Specifically, the mounting groove 10 is provided with an annular protrusion 11 extending toward one side of the top cover 200. The annular protrusion 11 is used to bend to snap into the explosion-proof seal 30, thereby fixing the explosion-proof seal 30, avoiding thermal deformation of the explosion-proof seal 30 caused by welding, and improving the reliability of the explosion-proof liquid injection sealing structure.

[0060] More specifically, a seal 50 is provided between the mounting groove 10 and the explosion-proof seal 30 and / or between the annular protrusion 11 and the explosion-proof seal 30, so that the seal between the explosion-proof seal 30 and the mounting groove 10 is improved, thereby improving the sealing effect of the explosion-proof seal 30 to achieve the sealing of the single battery.

[0061] Please refer to Figure 7 In order to prevent the explosion-proof seal 30 from failing due to notches caused by problems with the working environment or processing accuracy during use, resulting in the explosion-proof seal 30 being unable to rupture, in some embodiments, a safety structure 60 is provided at the bottom of the mounting groove 10. The safety structure 60 has a tip 61 on the side facing the explosion-proof seal 30. The safety structure 60 is configured to deform under heat to transport the tip 61 to the explosion-proof seal 30 and puncture the explosion-proof seal 30. That is, when the internal pressure of the single battery cell is too high, the internal temperature also rises until it reaches a set value. The safety structure 60 is then deformed by heat to push its tip 61 toward the explosion-proof seal 30 until the explosion-proof seal 30 is pushed open and ruptured, thereby further ensuring the rupture and pressure relief function of the explosion-proof seal 30.

[0062] Specifically, the tip 61 of the safety structure 60 is arranged corresponding to the notch of the explosion-proof seal 30, so that when the safety structure 60 is thermally deformed and pushes the tip 61 to move, the tip 61 pierces the notch, making it easier to rupture the explosion-proof seal 30 for pressure relief.

[0063] Optionally, the safety structure 60 may be made of a titanium alloy memory material to achieve a thermal deformation driving effect of the safety structure 60 .

[0064] Optionally, a limiting structure is provided in the circumference of the safety structure 60 to limit the deformation of the safety structure 60 in its circumferential direction, that is, the thermal deformation direction of the safety structure 60 is limited to the direction toward the explosion-proof seal 30, ensuring that the safety structure 60 can push the tip 61 to pierce the explosion-proof seal 30.

[0065] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Explosion-proof liquid injection sealing structure, characterized in that: Arranged on a top cover member (200) of a battery top cover assembly, the explosion-proof liquid injection sealing structure comprises: A mounting groove (10) is provided on the top cover (200); At least two spaced-apart injection holes (20) are provided at the bottom of the mounting groove (10); An explosion-proof seal (30) is sealed in the mounting groove (10) and seals the injection hole (20); the explosion-proof seal (30) is provided with a gas storage space (301), and the gas storage space (301) is used to collect gas inside the battery.

2. The explosion-proof liquid injection sealing structure according to claim 1, characterized in that: The explosion-proof seal (30) comprises an explosion-proof disc (31) and an annular support foot (32); the annular support foot (32) is arranged on a side of the explosion-proof disc (31) facing the mounting groove (10); the annular support foot (32) is sealedly connected to the mounting groove (10); the explosion-proof disc (31), the annular support foot (32) and the bottom of the mounting groove (10) enclose an air storage space (301).

3. The explosion-proof liquid injection sealing structure according to claim 1, characterized in that: The explosion-proof liquid injection sealing structure further comprises an explosion-proof membrane (40), and the explosion-proof membrane (40) is covered on the installation groove (10).

4. The explosion-proof liquid injection sealing structure according to claim 3, characterized in that: The explosion-proof membrane (40) and the explosion-proof seal (30) are both provided with notches, so that the explosion-proof membrane (40) and the explosion-proof seal (30) are ruptured along their own notches.

5. The explosion-proof liquid injection sealing structure according to claim 1, characterized in that: The explosion-proof seal (30) and the installation groove (10) are welded, riveted or buckled.

6. The explosion-proof liquid injection sealing structure according to claim 5, characterized in that: An annular protrusion (11) is provided on one side of the mounting groove (10) extending toward the top cover (200), and the annular protrusion (11) is used for bending to buckle with the explosion-proof sealing component (30).

7. The explosion-proof liquid injection sealing structure according to claim 6, characterized in that: A sealing member (50) is provided between the mounting groove (10) and the explosion-proof sealing member (30) and / or between the annular protrusion (11) and the explosion-proof sealing member (30).

8. The explosion-proof liquid injection sealing structure according to claim 1, characterized in that: A safety structure (60) is provided at the bottom of the installation groove (10), and a tip (61) is provided on the side of the safety structure (60) facing the explosion-proof seal (30). The safety structure (60) is configured to be deformed by heat so as to transport the tip (61) to the explosion-proof seal (30) and puncture the explosion-proof seal (30).

9. Battery top cover assembly, characterized in that, It comprises a top cover (200), a pole assembly (300) and an explosion-proof liquid injection sealing structure according to any one of claims 1 to 8, wherein the pole assembly (300) and the explosion-proof liquid injection sealing structure are both arranged on the top cover (200).

10. A single cell battery, characterized in that: The battery comprises a shell, a battery cell and a battery top cover assembly as claimed in claim 9, wherein the battery cell is arranged in the shell, and the battery top cover assembly is sealed at the opening of the shell.

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