Ion battery sealing nail

Abstract

The utility model provides an ion battery sealing nail which is suitable for a battery and comprises a sealing nail body, and a cavity is formed in the sealing nail body; an air inlet is formed in one end of the sealing nail body, and an air outlet is formed in the other end; one end of the cavity is communicated with the air inlet, and the other end of the cavity is communicated with the air outlet; a plurality of spherical cavities are formed in the cavity, and the diameter of each spherical cavity is larger than the inner diameter of the cavity; and a steel ball is arranged in each spherical cavity. Through the structure, the liquid injection hole can be effectively sealed without depending on external force, and the sealing structure is simple, convenient and easy to operate. The battery is simple in structure, residual gas after liquid injection and gas generated after formation of the battery can be timely discharged outwards, the performance of the battery is ensured, meanwhile, the liquid injection hole of the cover plate can be effectively sealed, and the sealing stability is good.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and in particular relates to a sealing nail for an ion battery. Background Art

[0002] Lithium-ion batteries have the advantages of high voltage, high specific energy, long cycle life, and long storage time. They are widely used in new energy vehicles, energy storage, portable electronic devices and other industries. Generally, lithium-ion batteries need to be sealed with sealing nails after the first injection and formation, and then placed at high temperature; among them, due to the sealing effect of the sealing nails, during the first injection and high-temperature standing process, the gas remaining in the pole piece and the gas generated after the formation and high-temperature standing cannot be removed in time, so that there is gas remaining between the pole pieces, between the pole piece and the diaphragm, etc., which will affect the interface contact, and then affect the pole piece state and battery performance.

[0003] Patent CN218101652U discloses a safety battery nail for lithium battery repair, which achieves the purpose of sealing by controlling the sealing pad with a spring. However, the sealing effect of the nail depends on the spring to control the sealing pad. Once the spring loses its function, the sealing effect will no longer exist. At the same time, the design of adding a spring also greatly increases the difficulty and cost of the manufacturing process. Utility Model Content

[0004] The utility model provides an ion battery sealing nail, which aims to solve the problem that the existing battery cannot timely discharge the residual gas and the gas generated after the formation after sealing, which affects the state of the pole piece and the battery performance.

[0005] To achieve the above-mentioned purpose, an embodiment of the utility model provides an ion battery sealing nail, which is suitable for batteries and includes a sealing nail body, wherein a cavity is arranged in the sealing nail body; an air inlet is arranged at one end of the sealing nail body, and an air outlet is arranged at the other end; one end of the cavity is connected to the air inlet, and the other end is connected to the air outlet; a plurality of spherical cavities are arranged in the cavity, and the diameter of the spherical cavity is larger than the inner diameter of the cavity; a steel ball is arranged in each of the spherical cavities.

[0006] As a preferred embodiment, several spherical cavities are arranged at equal intervals, and the steel balls are arranged one by one in correspondence with the spherical cavities. By arranging several spherical cavities at equal intervals, the spherical cavities form a series of structures, and combined with the gravity of the steel balls themselves, the electrolyte brought out by the gas inside the battery can be effectively buffered; the steel balls can play an effective sealing role due to their own gravity and in cooperation with the spherical cavities, and the electrolyte retained in the cavities can also play a liquid sealing role.

[0007] As a preferred embodiment, the steel ball is matched with the spherical cavity, so that the steel ball can play an effective sealing role due to its own gravity and the cooperation with the spherical cavity, and the electrolyte retained in the cavity can also play a liquid sealing role.

[0008] As a preferred embodiment, the distance between the spherical cavity near the air outlet and the air outlet is smaller than the distance between the spherical cavity near the air inlet and the air inlet.

[0009] As a preferred embodiment, the diameter of the gas outlet is smaller than the diameter of the gas inlet. The gas inside the battery can be discharged in time through the gas outlet.

[0010] As a preferred embodiment, the inner diameter of the cavity is the same as the diameter of the air inlet. Through the air inlet, the gas inside the battery can be introduced and flow into the cavity of the sealing nail and then discharged to the outside of the battery, thereby achieving timely discharge of the gas inside the battery.

[0011] As a preferred embodiment, one end of the sealing nail body close to the air inlet is configured as a tapered end.

[0012] As a preferred embodiment, the battery is a lithium-ion battery; the lithium-ion battery comprises a cover plate; the cover plate is provided with an injection hole for injecting electrolyte; the lithium-ion battery sealing nail is provided on the injection hole.

[0013] As a preferred embodiment, the sealing nail of the lithium ion battery is matched with the injection hole, and the tapered end is arranged close to the battery cell of the lithium ion battery. When in use, the tapered end of the sealing nail is inserted into the injection hole toward the battery cell.

[0014] The structure of the present application can discharge the gas inside the battery to the outside of the battery in time, and at the same time, can effectively prevent moisture outside the battery from entering the battery. By setting up several spherical cavities and setting them at equal intervals, the spherical cavities form a series of structures. Combined with the gravity of the steel balls themselves, the electrolyte brought out by the gas inside the battery can be effectively buffered; the steel balls can play an effective sealing role due to their own gravity and in coordination with the spherical cavities, and the electrolyte retained in the cavities can also play a liquid sealing role. Through the structure of the present application, the injection hole can be effectively sealed without relying on external force, which is simple, convenient and easy to operate. The structure of the present application is simple, and can discharge the residual gas of the battery after injection and the gas generated after formation in time to the outside, ensuring the performance of the battery. At the same time, it can effectively seal the injection hole of the cover plate, and the sealing stability is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the cross-sectional structure of the ion battery sealing nail according to an embodiment of the utility model. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present utility model are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present utility model.

[0018] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0019] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0020] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0021] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0022] Specifically, Figure 1 As shown, an embodiment of the utility model provides an ion battery sealing nail, which is suitable for batteries, including a sealing nail body 10, wherein a cavity 20 is arranged in the sealing nail body 10; an air inlet 30 is arranged at one end of the sealing nail body 10, and an air outlet 40 is arranged at the other end; one end of the cavity 20 is connected to the air inlet 30, and the other end is connected to the air outlet 40; a plurality of spherical cavities 21 are arranged in the cavity 20, and the diameter of the spherical cavity 21 is larger than the inner diameter of the cavity 20; a steel ball 50 is arranged in each of the spherical cavities 21.

[0023] As a preferred embodiment, several spherical cavities 21 are arranged at equal intervals, and the steel balls 50 are arranged one by one in correspondence with the spherical cavities 21. By arranging several spherical cavities 21 at equal intervals, the spherical cavities 21 form a series structure, and combined with the gravity of the steel balls themselves, the electrolyte brought out by the gas inside the battery can be effectively buffered; the steel balls 50 can play an effective sealing role due to their own gravity and in cooperation with the spherical cavities 21, and the electrolyte retained in the cavity can also play a liquid sealing role.

[0024] As a preferred embodiment, the steel ball 50 is matched with the spherical cavity 21. In this way, the steel ball 50 can play an effective sealing role due to its own gravity and the cooperation with the spherical cavity 21, and the electrolyte retained in the cavity can also play a liquid sealing role.

[0025] As a preferred embodiment, the distance between the spherical cavity 21 near the air outlet 40 and the air outlet 40 is smaller than the distance between the spherical cavity 21 near the air inlet 30 and the air inlet 30 .

[0026] As a preferred embodiment, the diameter of the gas outlet 40 is smaller than the diameter of the gas inlet 30. Through the gas outlet 40, the gas inside the battery can be discharged in time.

[0027] As a preferred embodiment, the inner diameter of the cavity 20 is the same as the diameter of the air inlet 30. Through the air inlet 30, the gas inside the battery can be introduced and made to flow into the cavity of the sealing nail and then discharged to the outside of the battery, so as to realize the timely discharge of the gas inside the battery.

[0028] As a preferred embodiment, one end of the sealing nail body 10 close to the air inlet 30 is configured as a tapered end.

[0029] As a preferred embodiment, the battery is a lithium-ion battery; the lithium-ion battery comprises a cover plate; the cover plate is provided with an injection hole for injecting electrolyte; the lithium-ion battery sealing nail is provided on the injection hole.

[0030] As a preferred embodiment, the sealing nail of the lithium ion battery is matched with the injection hole, and the tapered end is arranged close to the battery cell of the lithium ion battery. When in use, the tapered end of the sealing nail is inserted into the injection hole toward the battery cell.

[0031] The structure of the present application can discharge the gas inside the battery to the outside of the battery in time, and at the same time, can effectively prevent moisture outside the battery from entering the battery. By setting up several spherical cavities and setting them at equal intervals, the spherical cavities form a series of structures. Combined with the gravity of the steel balls themselves, the electrolyte brought out by the gas inside the battery can be effectively buffered; the steel balls can play an effective sealing role due to their own gravity and in coordination with the spherical cavities, and the electrolyte retained in the cavities can also play a liquid sealing role. Through the structure of the present application, the injection hole can be effectively sealed without relying on external force, which is simple, convenient and easy to operate. The structure of the present application is simple, and can discharge the residual gas of the battery after injection and the gas generated after formation in time to the outside, ensuring the performance of the battery. At the same time, it can effectively seal the injection hole of the cover plate, and the sealing stability is good.

[0032] In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0033] In addition, it should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0034] 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 and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An ion battery sealing nail, characterized in that: Suitable for batteries, including a sealing nail body, wherein a cavity is arranged in the sealing nail body; an air inlet is arranged at one end of the sealing nail body, and an air outlet is arranged at the other end; one end of the cavity is connected to the air inlet, and the other end is connected to the air outlet; a plurality of spherical cavities are arranged in the cavity, and the diameter of the spherical cavity is larger than the inner diameter of the cavity; and a steel ball is arranged in each of the spherical cavities.

2. The ion battery sealing nail according to claim 1, characterized in that: The plurality of spherical cavities are arranged at equal intervals, and the steel balls are arranged in one-to-one correspondence with the spherical cavities.

3. The ion battery sealing nail according to claim 1, characterized in that: The steel ball is matched with the spherical cavity.

4. The ion battery sealing nail according to claim 1, characterized in that: The distance between the spherical cavity near the air outlet and the air outlet is smaller than the distance between the spherical cavity near the air inlet and the air inlet.

5. The ion battery sealing nail according to claim 1, characterized in that: The diameter of the air outlet is smaller than the diameter of the air inlet.

6. The ion battery sealing nail according to claim 1, characterized in that: The inner diameter of the cavity is the same as the diameter of the air inlet.

7. The ion battery sealing nail according to claim 1, characterized in that: One end of the sealing nail body close to the air inlet is configured as a tapered end.

8. The ion battery sealing nail according to claim 7, characterized in that: The battery is a lithium-ion battery; the lithium-ion battery comprises a cover plate; the cover plate is provided with an injection hole for injecting electrolyte; the lithium-ion battery sealing nail is arranged on the injection hole.

9. The ion battery sealing nail according to claim 8, characterized in that: The ion battery sealing nail is matched with the injection hole, and the tapered end is arranged close to the battery cell of the lithium ion battery.

Images