Explosion-proof small lithium battery

Abstract

The utility model discloses a kind of anti-explosion small lithium batteries, including lithium battery body, the outside of lithium battery body is covered with flame-retardant layer, the outside of flame-retardant layer is covered with fire resistance layer, the outside of fire resistance layer is fixedly sleeved with anti-explosion outer shell, the outside of the upper end of anti-explosion outer shell is tightly clamped with upper anti-explosion ring, the outside of the lower end of anti-explosion outer shell is tightly clamped with lower anti-explosion ring, the lower surface of lower anti-explosion ring is fixedly installed with lower sealing plate, the outer surface of lower sealing plate is provided with several evenly distributed exhaust holes, the utility model is effectively promoted by the anti-explosion outer shell of being set the external shell structure strength of the utility model lithium battery, so it can be through high-strength anti-explosion outer shell to resist the impact force of battery explosion, reduce the influence of battery explosion to outside, to have better high-strength anti-explosion use characteristics, and the structure strength of shell end portion can be effectively improved by the upper anti-explosion ring and lower anti-explosion ring of being set, avoid port portion excessive deformation due to explosion impact.

Description

Technical Field

[0001] This utility model relates to the field of small lithium battery technology, specifically to an explosion-proof small lithium battery. Background Technology

[0002] Lithium batteries are one of the most common batteries in daily life. Lithium-ion batteries are widely used in mobile phones, laptops, power tools, electric vehicles, backup power supplies for streetlights, and small household appliances. Lithium batteries are characterized by their small size, low loss during repeated charging, and lightweight and stable operation, making them a suitable power source for short-term use.

[0003] Lithium batteries require a suitable environment during use and must not be impacted by external forces. Otherwise, the impact of external forces will cause the positive and negative electrodes inside to come into contact, resulting in a short circuit and an explosion, which may cause a fire. Therefore, explosion-proof safety of lithium batteries is necessary in some important electrical appliances. For this purpose, this utility model proposes a high-strength explosion-proof small lithium battery. Utility Model Content

[0004] The purpose of this invention is to provide an explosion-proof small lithium battery to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an explosion-proof small lithium battery, comprising a lithium battery body, the lithium battery body being covered with a flame-retardant layer, the flame-retardant layer being covered with a fire-resistant layer, an explosion-proof outer shell being fixedly fitted onto the fire-resistant layer, an upper explosion-proof ring being clamped to the upper port of the explosion-proof outer shell, a lower explosion-proof ring being clamped to the lower port of the explosion-proof outer shell, a lower sealing plate being fixedly installed on the lower surface of the lower explosion-proof ring, and a plurality of evenly distributed vent holes being provided on the outer surface of the lower sealing plate.

[0006] Preferably, an upper sealing plate is fixedly installed on the upper surface of the upper explosion-proof ring, and both the upper sealing plate and the lower sealing plate are made of high-strength conductive alloy.

[0007] Preferably, a positive electrode contact is fixedly installed at the center of the upper surface of the upper sealing plate, and the positive electrode contact is electrically connected to the lithium battery body through the upper sealing plate.

[0008] Preferably, the upper and lower end faces of the explosion-proof housing are horizontally flush with the upper and lower end faces of the lithium battery body.

[0009] Preferably, the explosion-proof housing, the upper explosion-proof ring, and the lower explosion-proof ring are made of the same material, and all three are made of high-strength metal material.

[0010] Preferably, the flame-retardant layer is filled with flame-retardant dry powder.

[0011] Preferably, the interior of the refractory layer is filled with refractory cotton.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] The explosion-proof outer shell of this utility model can effectively improve the structural strength of the outer shell of the lithium battery. In this way, the high-strength explosion-proof outer shell can resist the impact of battery explosion and reduce the impact of battery explosion on the outside world, thus having good high-strength explosion-proof performance characteristics.

[0014] The upper and lower explosion-proof rings effectively enhance the structural strength of the outer casing port, preventing excessive deformation of the port due to explosion impact. This improves practicality, provides actual port reinforcement, and effectively enhances overall explosion-proof performance.

[0015] Because the flame-retardant layer contains flame-retardant dry powder, the flame-retardant dry powder can be discharged after the inner structure of the flame-retardant layer is damaged. The discharged flame-retardant dry powder can cover the outer surface of the lithium battery body, thereby forming a dry powder isolation layer that hinders combustion, thus achieving a certain flame-retardant effect and having good flame-retardant properties, improving the safety of the explosion-proof lithium battery of this utility model.

[0016] Meanwhile, the fire-resistant cotton filling the interior of the fire-resistant layer enables the lithium battery of this invention to have good fire resistance. The fire-resistant cotton can effectively prevent the spread of fire, thereby reducing or delaying the spread of fire. In actual use, it can provide valuable delay time for the fire extinguishing work of the lithium battery, and has good fire-resistant delay characteristics, preventing the fire from spreading further. By using it in conjunction with the flame-retardant layer, the overall fire resistance of the lithium battery of this invention can be effectively improved, and it has good safety in use.

[0017] Furthermore, this utility model has a vent hole on the lower sealing plate. When a short circuit occurs inside the lithium battery and high-temperature gas is generated, the gas generated by the short circuit can be discharged to the outside through the vent hole. This effectively prevents the gas from continuously accumulating inside and forming high-pressure and high-temperature gas, and has a good gas pressure relief effect. By venting the high-temperature gas, the lithium battery can be effectively prevented from exploding under high pressure, and has a good pressure relief and explosion-proof effect. The structure is safer to use. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall external three-dimensional structure of the lithium battery according to an embodiment of the present utility model;

[0019] Figure 2 This is a bottom view of the lithium battery structure according to an embodiment of the present invention;

[0020] Figure 3This is a schematic diagram of the internal structure of the explosion-proof housing according to an embodiment of the present utility model;

[0021] Figure 4 This is a schematic diagram of the internal cross-sectional structure of the upper end of the lithium battery according to an embodiment of the present invention.

[0022] In the diagram: 1. Lithium battery body; 2. Flame retardant layer; 3. Fire resistant layer; 4. Explosion-proof outer shell; 5. Upper explosion-proof ring; 6. Lower explosion-proof ring; 7. Upper sealing plate; 8. Lower sealing plate; 9. Vent hole; 10. Flame retardant dry powder; 11. Fire resistant cotton. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" 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 a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Please see Figure 1-4 An embodiment of this utility model is provided: an explosion-proof small lithium battery, including a lithium battery body 1, the outside of the lithium battery body 1 is covered with a flame-retardant layer 2, and the inside of the flame-retardant layer 2 is filled with flame-retardant dry powder 10.

[0027] With this structural design, when an open flame occurs inside the lithium battery body 1, the flame can burn through the inner structure of the flame-retardant layer 2. Since the flame-retardant layer 2 contains flame-retardant dry powder 10, the flame-retardant dry powder 10 can be discharged after the inner structure of the flame-retardant layer 2 is damaged. The discharged flame-retardant dry powder 10 can cover the outer surface of the lithium battery body 1, thereby forming a dry powder isolation layer that hinders combustion, thus achieving a certain flame-retardant effect and having good flame-retardant properties, improving the safety of the explosion-proof lithium battery of this utility model.

[0028] The flame-retardant layer 2 is covered with a fire-resistant layer 3, and the fire-resistant layer 3 is filled with fire-resistant cotton 11.

[0029] This structural design, through the fire-resistant cotton 11 filling the interior of the fire-resistant layer 3, enables the lithium battery of this utility model to have good fire resistance. The fire-resistant cotton 11 can effectively prevent the spread of fire, thereby reducing or delaying the spread of fire. In actual use, it can provide valuable delay time for the fire extinguishing work of the lithium battery, and has good fire-resistant delay characteristics, preventing the fire from spreading further. By using it in conjunction with the flame-retardant layer 2, the overall fire resistance of the lithium battery of this utility model can be effectively improved, and it has good safety in use.

[0030] The fire-resistant layer 3 is fixedly fitted with an explosion-proof outer shell 4. An upper explosion-proof ring 5 is clamped to the upper port of the explosion-proof outer shell 4, and a lower explosion-proof ring 6 is clamped to the lower port of the explosion-proof outer shell 4. The explosion-proof outer shell 4, the upper explosion-proof ring 5, and the lower explosion-proof ring 6 are made of the same material, and all three are made of high-strength metal materials.

[0031] This structural design, through the explosion-proof outer shell 4, can effectively improve the structural strength of the outer shell of the lithium battery of this utility model. In this way, the high-strength explosion-proof outer shell 4 can resist the impact of battery explosion and reduce the impact of battery explosion on the outside world, thus having good high-strength explosion-proof performance characteristics.

[0032] The upper explosion-proof ring 5 and the lower explosion-proof ring 6 can effectively improve the structural strength of the port of the outer shell, prevent the port from being excessively deformed due to the explosion impact, make it more practical, have the actual effect of port reinforcement, and effectively improve the overall explosion-proof performance.

[0033] An upper sealing plate 7 is fixedly installed on the upper surface of the upper explosion-proof ring 5, and a lower sealing plate 8 is fixedly installed on the lower surface of the lower explosion-proof ring 6. Several evenly distributed vent holes 9 are provided on the outer surface of the lower sealing plate 8.

[0034] To ensure the high strength and conductivity of the sealing plate, a positive electrode contact is fixedly installed at the center of the upper surface of the upper sealing plate 7. The positive electrode contact is electrically connected to the lithium battery body 1 through the upper sealing plate 7. Both the upper sealing plate 7 and the lower sealing plate 8 are made of high-strength conductive alloy. The high-strength conductive alloy can be aluminum oxide copper alloy, which is a high-strength and high-conductivity composite material. It can ensure the conductivity while ensuring the structural strength, thus ensuring the normal use of the lithium battery.

[0035] This structural design, through the upper sealing plate 7 and the lower sealing plate 8, can encapsulate the upper and lower ends of the lithium battery, ensuring normal use. Furthermore, the lower sealing plate 8 has a vent 9. When a short circuit occurs inside the lithium battery body 1, generating high-temperature gas, the gas can be expelled through the vent 9, effectively preventing the continuous accumulation of gas inside and the formation of high-pressure, high-temperature gas. This provides excellent gas pressure relief and effectively prevents the lithium battery from exploding under high pressure, resulting in better pressure relief and explosion-proof performance and higher structural safety.

[0036] In this embodiment, in order to improve the structural compatibility between the explosion-proof housing 1 and the lithium battery body 1, the upper and lower end faces of the explosion-proof housing 4 are level with the upper and lower end faces of the lithium battery body 1, thereby avoiding the lithium battery body 1 from protruding and ensuring structural compatibility and aesthetics.

[0037] Working principle: Users can use the lithium battery of this utility model through conventional usage methods. The explosion-proof shell 4 of this utility model can effectively improve the structural strength of the external shell of the lithium battery. In this way, the high-strength explosion-proof shell 4 can resist the impact of battery explosion and reduce the impact of battery explosion on the outside world, thus having good high-strength explosion-proof performance characteristics.

[0038] The upper explosion-proof ring 5 and the lower explosion-proof ring 6 can effectively improve the structural strength of the port of the outer shell, prevent the port from being excessively deformed due to the explosion impact, make it more practical, have the actual effect of port reinforcement, and effectively improve the overall explosion-proof performance.

[0039] When an open flame occurs inside the lithium battery body 1, the flame can burn through the inner structure of the flame-retardant layer 2. Since the flame-retardant dry powder 10 is provided inside the flame-retardant layer 2, the flame-retardant dry powder 10 inside can be discharged after the inner structure of the flame-retardant layer 2 is damaged. The discharged flame-retardant dry powder 10 can cover the outer surface of the lithium battery body 1, thereby forming a dry powder isolation layer that hinders combustion, thus achieving a certain flame-retardant effect and having good flame-retardant properties, improving the safety of the explosion-proof lithium battery of this utility model.

[0040] Meanwhile, the fire-resistant cotton 11 filled inside the fire-resistant layer 3 enables the lithium battery of this utility model to have good fire resistance. The fire-resistant cotton 11 can effectively prevent the spread of fire, thereby reducing or delaying the spread of fire. In actual use, it can provide valuable delay time for the fire extinguishing work of the lithium battery, and has good fire-resistant delay characteristics, preventing the fire from spreading further. By using it in conjunction with the flame-retardant layer 2, the overall fire resistance of the lithium battery of this utility model can be effectively improved, and it has good safety in use.

[0041] Furthermore, this utility model provides an exhaust port 9 on the lower sealing plate 8. When a short circuit occurs inside the lithium battery body 1 and generates high-temperature gas, the gas generated by the short circuit can be discharged to the outside through the exhaust port 9. This effectively prevents the gas from continuously accumulating inside and forming high-pressure and high-temperature gas, thus having a good gas pressure relief effect. By venting the high-temperature gas, the lithium battery can be effectively prevented from exploding under high pressure, thus having a good pressure relief and explosion-proof effect and a higher structural safety.

[0042] In summary, the lithium battery of this invention exhibits good flame retardant and explosion-proof performance in practical use. Its external structural strength is higher, effectively resisting external forces and internal explosive impacts, thus demonstrating good high-strength explosion-proof performance. This enhances the safety and effectiveness of the lithium battery of this invention.

[0043] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An explosion-proof small lithium battery, comprising a lithium battery body (1), characterized in that, The lithium battery body (1) is covered with a flame-retardant layer (2), the flame-retardant layer (2) is covered with a fire-resistant layer (3), an explosion-proof shell (4) is fixedly fitted on the outside of the fire-resistant layer (3), an upper explosion-proof ring (5) is clamped on the outside of the upper port of the explosion-proof shell (4), a lower explosion-proof ring (6) is clamped on the outside of the lower port of the explosion-proof shell (4), a lower sealing plate (8) is fixedly installed on the lower surface of the lower explosion-proof ring (6), and a number of evenly distributed exhaust holes (9) are provided on the outer surface of the lower sealing plate (8).

2. The explosion-proof small lithium battery according to claim 1, characterized in that: The upper explosion-proof ring (5) is fixedly installed with an upper sealing plate (7), and both the upper sealing plate (7) and the lower sealing plate (8) are made of high-strength conductive alloy.

3. The explosion-proof small lithium battery according to claim 2, characterized in that: A positive electrode contact is fixedly installed at the center of the upper surface of the upper sealing plate (7), and the positive electrode contact is electrically connected to the lithium battery body (1) through the upper sealing plate (7).

4. The explosion-proof small lithium battery according to claim 2, characterized in that: The upper and lower surfaces of the explosion-proof housing (4) are level with the upper and lower surfaces of the lithium battery housing (1).

5. The explosion-proof small lithium battery according to claim 1, characterized in that: The explosion-proof housing (4), the upper explosion-proof ring (5) and the lower explosion-proof ring (6) are made of the same material, and the explosion-proof housing (4), the upper explosion-proof ring (5) and the lower explosion-proof ring (6) are all made of high-strength metal material.

6. The explosion-proof small lithium battery according to claim 1, characterized in that: The flame-retardant layer (2) is filled with flame-retardant dry powder (10).

7. The explosion-proof small lithium battery according to claim 1, characterized in that: The interior of the refractory layer (3) is filled with refractory cotton (11).

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