Sealing rubber plug, single battery and electric equipment

Abstract

The utility model belongs to the technical field of battery production, and discloses a sealing rubber plug, a single battery and electric equipment. The sealing rubber plug comprises a plug head and a plug body which are integrally formed from top to bottom, the diameter of the plug head is larger than that of the plug body, the plug body can be inserted into a liquid injection hole of a cover plate of a single battery in a matched mode, and the bottom wall of the plug head can abut against the top wall of the cover plate so that the plug head can seal the liquid injection hole. An exhaust groove is formed in the circumferential outer wall of the plug body and extends to the top end of the plug body from the bottom end of the plug body. According to the sealing rubber plug, generated gas can be exhausted in the formation process, the sealing rubber plug is prevented from being ejected out, and the reliability of the formation process and the yield of finally obtained single batteries are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery production technical field especially relates to a sealing rubber plug, single battery and electric equipment. BACKGROUND

[0002] The liquid injection of cylindrical battery needs to be formed in the manufacturing process, and the injection hole needs to be temporarily sealed by forming a rubber plug in the process. The conventional forming rubber plug is not designed with an exhaust groove, which leads to the fact that the gas generated in the forming process cannot be normally discharged, and the accumulation of a large amount of gas may cause the forming rubber plug to be loose. In addition, due to the unstable size of the forming rubber plug caused by the forming process, the sealing is unstable, and the forming rubber plug is easily pushed out during the exhaust process, affecting the forming process.

[0003] Therefore, it is urgent to provide a new sealing rubber plug, single battery and electric equipment to solve the above technical problems in the prior art. UTILITY MODEL CONTENT

[0004] One purpose of the utility model is to provide a sealing rubber plug that can discharge the generated gas during the forming process, avoid the sealing rubber plug from being pushed out, and improve the reliability of the forming process and the yield of the final single battery.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The sealing rubber plug comprises a plug head and a plug body integrally formed from top to bottom. The diameter of the plug head is greater than the diameter of the plug body. The plug body can be inserted into the injection hole of the cover plate of the single battery. The bottom wall of the plug head can abut against the top wall of the cover plate to seal the injection hole. The circumferential outer wall of the plug body is provided with an exhaust groove. The exhaust groove extends from the bottom end of the plug body to the top end of the plug body.

[0007] Optionally, a plurality of exhaust grooves are arranged along the circumference of the plug body.

[0008] Optionally, the exhaust groove extends in a straight line, a curve, a zigzag or a wave shape.

[0009] Optionally, the exhaust groove extends in a straight line, and the extension direction of the exhaust groove is parallel to the central axis of the plug body.

[0010] Optionally, the end of the plug body away from the plug head is provided with a reverse tapered section. The outer diameter of the end of the reverse tapered section away from the plug body is smaller than the outer diameter of the end of the reverse tapered section close to the plug body.

[0011] Optionally, the outer diameter of the end of the reverse tapered section close to the plug body is the same as the outer diameter of the plug body.

[0012] Optionally, the height of the plug body is greater than the thickness of the cover plate, and the inverted conical section is provided with the exhaust groove at least in part.

[0013] Optionally, the plug body is made of elastic member.

[0014] Another purpose of the utility model lies in providing a single battery, which is sealed by the sealing plug according to any of the above solutions when formation.

[0015] Still another purpose of the utility model lies in providing an electric device, which comprises the single battery according to the above solution.

[0016] Beneficial effects:

[0017] The sealing plug in the utility model comprises an integrally formed plug head and plug body, the sealing plug is inserted into the sealing glue of the cover plate, the bottom wall of the plug head abuts against the top of the battery cover plate to seal the liquid injection hole on the cover plate, the sealing of the single battery is realized, and the formation process can be performed at this time, gas is gathered in the single battery during formation, the sealing plug can be slightly lifted at this time, the sealing of the liquid injection hole by the plug head is released, the gathered gas can be discharged outward from the exhaust groove, the sealing plug is prevented from being pushed out by the gas in the single battery, and the reliability of the formation process is ensured. The sealing plug can discharge the generated gas during formation, the sealing plug is prevented from being pushed out, the reliability of the formation process is improved, and the yield of the single battery obtained finally is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a longitudinal sectional view of the sealing plug sealing the liquid injection hole according to the embodiment of the utility model;

[0019] Figure 2 is an axonometric view of the sealing plug according to the embodiment of the utility model.

[0020] In the drawings:

[0021] 10, cover plate; 11, liquid injection hole; 110, plug head; 120, plug body; 121, inverted conical section; 130, exhaust groove. DETAILED DESCRIPTION

[0022] The utility model will be further described in detail in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0023] In the description of the utility model, unless another definite provision and limitation, the term "link", "connect", "fix" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication or two elements of the interaction relationship.For the ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0024] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include the first and second features direct contact, also can include the first and second features are not direct contact but contact through the additional features between them.Moreover, the first feature is "on", "above" and "on" the second feature includes the first feature is directly above and obliquely above the second feature, or just indicates that the horizontal height of the first feature is higher than the second feature.The first feature is "under", "below" and "under" the second feature includes the first feature is directly below and obliquely below the second feature, or just indicates that the horizontal height of the first feature is less than the second feature.

[0025] In the description of the embodiment, the terms "on", "under", "right", etc. Orientation or position relationship is based on the orientation or position relationship shown in the drawing, only for the convenience of description and simplification operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model.In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0026] Please refer to Figure 1 And Figure 2 As shown in the figure, the sealing plug includes a plug head 110 and a plug body 120 integrally formed from top to bottom, the diameter of the plug head 110 is greater than the diameter of the plug body 120, the plug body 120 can be fitted into the injection hole 11 of the cover plate 10 of the single battery, the bottom wall of the plug head 110 can abut against the top wall of the cover plate 10, so that the plug head 110 seals the injection hole 11, and the circumferential outer wall of the plug body 120 is provided with an exhaust groove 130, the exhaust groove 130 extends from the bottom end of the plug body 120 to the top end of the plug body 120.

[0027] The sealing plug in the embodiment comprises an integrally formed plug head 110 and a plug body 120. The plug body 120 is used to cooperate with the sealing glue inserted into the cover plate 10, and the bottom wall of the plug head 110 abuts against the top of the battery cover plate 10 to seal the liquid injection hole 11 on the cover plate 10, thereby realizing the sealing of the single battery. At this time, the formation process can be performed. When the gas is gathered in the single battery during the formation, the sealing plug can be slightly lifted to remove the sealing of the liquid injection hole 11 by the plug head 110, and the gathered gas can be discharged outward from the exhaust groove 130, thereby avoiding the sealing plug from being pushed out by the gas in the single battery and ensuring the reliability of the formation process. The sealing plug can discharge the generated gas during the formation, avoid the sealing plug from being pushed out, improve the reliability of the formation process, and improve the yield of the single battery.

[0028] The plug head 110 and the plug body 120 in the embodiment are both cylindrical, and will not be described here.

[0029] Further, the above-mentioned exhaust groove 130 is spaced apart along the circumference of the above-mentioned plug body 120. In the embodiment, the exhaust groove 130 is uniformly spaced apart along the circumference of the plug body 120. The plurality of exhaust grooves 130 can further ensure that the gas generated during the formation process is smoothly discharged, avoid the gathering of the gas, thereby avoiding the sealing plug from being pushed out due to the rapid increase of the internal pressure of the single battery, and further improving the reliability of the formation process.

[0030] In the embodiment, the above-mentioned exhaust groove 130 extends in a straight line, a curve, a zigzag or a wave shape. The extension shape of the exhaust groove 130 is not specifically limited, as long as it can extend from the head to the tail of the plug body 120 to ensure that the gas generated during the formation of the single battery is smoothly discharged, which will not be specifically limited here.

[0031] Specifically, please continue to refer to Figure 2 The above-mentioned exhaust groove 130 extends in a straight line, and the extension direction of the above-mentioned exhaust groove 130 is parallel to the central axis of the above-mentioned plug body 120. That is, the exhaust groove 130 extends along the axial direction of the plug body 120. At this time, the extension length of the exhaust groove 130 is the shortest, which can reduce the manufacturing cost of the sealing plug as much as possible, and ensure that the gas flow distance is the shortest, and the gas discharge is more smooth.

[0032] In the embodiment, the plug body 120 is provided with an inverted conical section 121 at one end away from the plug head 110. The outer diameter of the one end of the inverted conical section 121 away from the plug body 120 is smaller than the outer diameter of the one end of the inverted conical section 121 close to the plug body 120. That is, the outer diameter of the bottom of the inverted conical section 121 is smaller than the outer diameter of the top of the inverted conical section 121, so that when the sealing plug is inserted into the liquid injection hole 11, the inverted conical section 121 plays a guiding and positioning role, facilitating the insertion of the sealing plug and improving the production efficiency.

[0033] Specifically, the outer diameter of the inverted conical section 121 close to one end of the plug body 120 is the same as the outer diameter of the plug body 120. That is, the inverted conical section 121 gradually transitions from the bottom of the plug body 120 to the inverted conical section 121, and the connection between the inverted conical section 121 and the plug body 120 is more smooth, avoiding jamming when the plug body 120 is inserted into the liquid injection hole 11, ensuring that the sealing plug can be quickly inserted into the liquid injection hole 11, avoiding the sealing plug from being skewed due to jamming during insertion, and improving the sealing performance.

[0034] In this embodiment, the height of the plug body 120 is greater than the thickness of the cover plate 10, and at least part of the inverted conical section 121 is provided with the exhaust groove 130. It should be noted that the inverted conical section 121 close to one end of the plug body 120, that is, the top of the inverted conical section 121 is also provided with the exhaust groove 130, which prevents the inverted conical section 121 from blocking the liquid injection hole 11 and ensures that the exhaust groove 130 can smoothly discharge the gas inside the single battery cell.

[0035] As a preferred embodiment, the plug body 120 is made of an elastic member. It should be noted that although the plug body 120 is integrally formed with the plug head 110, the plug body 120 and the plug head 110 can still be connected by using hot melting or segmented injection molding. At this time, the plug head 110 can be made of an elastic material or a plastic material. The plug body 120 is made of an elastic material, so that the plug body 120 can be connected with the liquid injection hole 11 in interference, ensuring that the sealing plug is firmly inserted into the liquid injection hole 11 and improving the connection stability between the sealing plug and the liquid injection hole 11.

[0036] The sealing plug is entirely made of an elastic material, which can be made of fluororubber, copolymer rubber, silicone rubber, etc. It mainly has certain elasticity and can prevent electrolyte corrosion. Details are not described here.

[0037] This embodiment also provides a single battery cell, which uses the sealing plug according to any one of the above-mentioned solutions to seal the liquid injection hole 11 during formation. The single battery cell can be a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid (or lead-acid) battery, a lithium-ion battery, a polymer lithium-ion battery, etc. The single battery cell can also be a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, or a sodium-ion battery, or a magnesium-ion battery, etc. Details are not described here. The single battery cell has the beneficial effects of the sealing plug according to any one of the above-mentioned solutions. Details are not described here.

[0038] Specifically, the single battery cell uses the sealing plug to seal the liquid injection hole 11 of the cover plate 10 during formation, which can discharge the generated gas during formation, avoid the sealing plug from being ejected, and improve the reliability of the formation process and the yield of the final single battery cell.

[0039] The embodiment further provides a power utilization device, which comprises the single battery according to the above scheme. The power utilization device can be an electric bicycle, an electric vehicle, a hybrid vehicle, a ship, an energy storage device, etc., as long as electric energy is used as an energy source, and details are not described herein.

[0040] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the utility model. Here, all the embodiments need not and cannot be exhausted. Any modification, equivalent substitution and improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A sealing plug, characterized in that The sealing plug comprises a plug head (110) and a plug body (120) integrally formed from top to bottom, the diameter of the plug head (110) is larger than that of the plug body (120), the plug body (120) is capable of being fitted into a liquid injection hole (11) of a cover plate (10) of a single battery, a bottom wall of the plug head (110) is capable of abutting against a top wall of the cover plate (10) so as to seal the liquid injection hole (11), and a circumferential outer wall of the plug body (120) is provided with an exhaust groove (130) extending from a bottom end of the plug body (120) to a top end of the plug body (120).

2. The sealing plug of claim 1, wherein The exhaust groove (130) is spaced apart along the circumference of the plug body (120).

3. The sealing plug of claim 2, wherein The exhaust groove (130) extends in a straight line, a curve, a zigzag or a wave shape.

4. The sealing plug of claim 3, wherein The exhaust groove (130) extends in a straight line, and the extending direction of the exhaust groove (130) is parallel to the central axis of the plug body (120).

5. The sealing plug of claim 1, wherein A distal end of the plug body (120) away from the plug head (110) is provided with a reverse tapered section (121), the outer diameter of the distal end of the reverse tapered section (121) is smaller than that of a proximal end of the reverse tapered section (121) close to the plug body (120).

6. The sealing plug of claim 5, wherein The outer diameter of the proximal end of the reverse tapered section (121) close to the plug body (120) is the same as that of the plug body (120).

7. The sealing plug of claim 5, wherein The height of the plug body (120) is greater than the thickness of the cover plate (10), and at least part of the reverse tapered section (121) is provided with the exhaust groove (130).

8. The sealing plug according to any one of claims 1 to 7, characterized in that The plug body (120) is made of an elastic member.

9. A single cell characterized by The single battery is sealed by using the sealing plug according to any one of claims 1-8 when the single battery is formed.

10. An electrical device, characterized by The single battery comprises the sealing plug according to claim 9.

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