Lithium battery shell with built-in anti-explosion interlayer

Abstract

The utility model discloses a lithium battery shell with a built-in explosion-proof interlayer, and particularly relates to the technical field of lithium batteries, the lithium battery shell comprises a shell body, a sealing cover is hinged to one side of the shell body, a mounting frame is arranged in the shell body, an explosion-proof mechanism is arranged in the mounting frame, and the explosion-proof mechanism comprises a flame-retardant resin layer fixedly arranged on the inner wall of the mounting frame; a flame-retardant resin layer is fixedly arranged on one side of the mounting frame, a mica sheet layer is fixedly arranged on one side of the flame-retardant resin layer, a ceramic fiber layer is fixedly arranged on one side of the mica sheet layer, a lithium battery body is arranged in the ceramic fiber layer, through holes are formed in the surfaces of the mounting frame, the flame-retardant resin layer and the mica sheet layer, and snakelike fins are fixedly arranged in the through holes. And one end of each snake-shaped fin is connected with the ceramic fiber layer. The explosion-proof mechanism is arranged in the mounting frame, the overall layout is compact, all parts work cooperatively, the explosion-proof performance is enhanced, the heat dissipation function is optimized, and reliable protection is provided for the lithium battery.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, and more specifically, to a lithium battery casing with a built-in explosion-proof separator. Background Technology

[0002] Lithium batteries have become an ideal energy source in many fields today due to their advantages such as high working voltage, light weight, high specific energy, low self-discharge, no memory effect, and no environmental pollution. However, because lithium metal is chemically very active, the processing, storage, and use of lithium metal have very high environmental requirements. With the development of science and technology, lithium batteries have become the mainstream.

[0003] In existing mechanisms, the casing is easily damaged under vibration and impact, and has poor shock absorption capacity. Since the casing is usually made of metal, it is easy for it to come into contact with the battery cells after it breaks, which can cause short circuits between the battery cells and damage them.

[0004] A search revealed that Chinese patent CN222546525U discloses a lithium battery pack shell structure. This structure divides the shell into an outer shell and an inner shell, and sets a buffer layer between the outer shell and the inner shell. When the shell is subjected to external impact, it can protect the lithium battery stored inside the cavity. In addition, the design of the ventilation port can ventilate and dissipate heat from the lithium battery body, so as to avoid the lithium battery body from overheating during operation and shortening its service life.

[0005] However, in actual use, this structure only protects the lithium battery from external impacts through the outer shell, inner shell, and buffer layer. When thermal runaway occurs, a large amount of heat will be generated rapidly inside the battery, causing the battery temperature to rise sharply. The battery may explode due to excessive internal pressure, threatening the safety of surrounding personnel and equipment. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a lithium battery casing with a built-in explosion-proof separator to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A lithium battery casing with a built-in explosion-proof partition includes a casing body, a sealing cover hinged to one side of the casing body, a mounting frame inside the casing body, and an explosion-proof mechanism inside the mounting frame.

[0009] The explosion-proof mechanism includes a flame-retardant resin layer fixedly installed on the inner wall of the mounting frame. A mica sheet layer is fixedly installed on one side of the flame-retardant resin layer, and a ceramic fiber layer is fixedly installed on one side of the mica sheet layer. A lithium battery body is installed inside the ceramic fiber layer. Through holes are opened on the surfaces of the mounting frame, the flame-retardant resin layer, and the mica sheet layer. A serpentine fin is fixedly installed inside the through hole. One end of the serpentine fin is connected to the ceramic fiber layer. A heat dissipation channel is opened on the surface of the mounting frame, and the other end of the serpentine fin is connected to the heat dissipation channel.

[0010] By adopting the above technical solutions, multi-layer protection effectively blocks heat and flames, prevents damage to the outer shell and flying debris, and reduces the risk of lithium battery explosion. Moreover, one end of the serpentine fin is connected to the ceramic fiber layer, and the other end is connected to the heat dissipation channel. With the special through-hole design, the heat dissipation area is increased and the heat conduction is accelerated, which can quickly dissipate the heat generated by the lithium battery and ensure that it works at a suitable temperature.

[0011] Reasonable structure: The installation frame is equipped with an explosion-proof mechanism, the overall layout is compact, and all components work together to enhance the explosion-proof performance and optimize the heat dissipation function, providing reliable protection for the lithium battery.

[0012] As a further description of the above technical solution: a fixed frame is provided through one side of the outer shell, a fan is installed inside the fixed frame, a filter screen is slidably arranged inside the fixed frame, a handle is fixedly arranged on one side of the filter screen, slots are provided on the surfaces of the fixed frame and the handle, a plug frame is inserted into the slot, and the plug frame is connected to the handle by bolts.

[0013] By adopting the above technical solutions, the overall heat dissipation efficiency is further improved, ensuring that the lithium battery operates stably at lower temperatures and extending its service life. The filter can effectively filter impurities in the air entering the casing, preventing dust, particles and other foreign objects from affecting the normal operation of the lithium battery, maintaining a clean internal environment, and reducing the risk of failure caused by impurities.

[0014] As a further description of the above technical solution: a fixing mechanism is provided on one side of the ceramic fiber layer. The fixing mechanism includes a plurality of stabilizing sleeves fixedly disposed on one side of the ceramic fiber layer. A stabilizing rod is slidably disposed inside the stabilizing sleeve. A spring is fixedly disposed outside the stabilizing sleeve and the stabilizing rod. A fixing plate is fixedly disposed at one end of the spring and the stabilizing rod. A rubber layer is fixedly disposed on one side of the fixing plate.

[0015] By adopting the above technical solutions, the lithium battery is ensured to be in a stable position inside the casing, avoiding loose connections or other malfunctions caused by shaking, thereby improving its working stability and reliability.

[0016] As a further description of the above technical solution: a sealing ring is fixedly provided at the bottom of the sealing cover, a protrusion is fixedly provided on one side of the sealing cover, the outer shell is made of stainless steel, threaded holes are provided on the surface of the protrusion and the outer shell, a threaded rod is threadedly connected to the inside of the threaded hole, and a handle is threadedly connected to one side of the threaded rod.

[0017] By adopting the above technical solution, a stable and clean working environment is created for the lithium battery, avoiding performance degradation or malfunction caused by external factors. Moreover, the threaded rod can be tightened or loosened simply by rotating the handle, which facilitates daily maintenance, inspection and replacement of the lithium battery and improves the convenience of use.

[0018] The technical effects and advantages of this utility model are as follows:

[0019] 1. By incorporating an explosion-proof mechanism, compared to existing technologies, this product features a multi-layered structure with clearly defined functions for explosion protection. The ceramic fiber layer provides insulation, mitigating heat transfer during abnormal situations. The mica sheet layer is insulating and flame-retardant, effectively blocking flame heat even if the ceramic fiber layer is damaged, preventing its spread to the flame-retardant resin layer. The outermost flame-retardant resin layer is high-strength and flame-retardant, withstanding pressure and heat, preventing shell damage and debris splashing, and exhibiting excellent explosion-proof performance. Simultaneously, the ceramic fiber layer, in conjunction with the serpentine fins, increases the heat dissipation area and improves heat dissipation efficiency. Furthermore, the fan accelerates airflow, quickly carrying the heat generated by the lithium battery out of the casing, effectively reducing the risk of overheating and ensuring stable operation of the lithium battery at a suitable temperature. This provides a safe and reliable working environment for the lithium battery and enhances its explosion-proof effect.

[0020] 2. By setting up a fixing mechanism, compared with existing technologies, the lithium battery body can be firmly fixed when placed by the cooperation of springs, stabilizing rods, fixing plates and rubber layers. The rubber layer buffers and protects the battery surface, and can also effectively reduce external vibrations, ensuring the safety and stability of the battery. Moreover, the sealing ring at the bottom of the sealing cover can effectively prevent external dust and moisture from entering, creating a stable working environment for the lithium battery, which is conducive to improving battery performance and life. Disassembly is also convenient, and the filter screen is easy to clean regularly, ensuring clean air inside the equipment, maintaining good heat dissipation and operating effect, and ensuring the continuous and stable operation of the lithium battery. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0022] Figure 2 This is a schematic diagram of the overall side cross-sectional structure of this utility model.

[0023] Figure 3 This is a schematic diagram of the overall working structure of this utility model.

[0024] Figure 4 This is a schematic diagram of the explosion-proof mechanism of this utility model.

[0025] Figure 5 This is a schematic diagram of the disassembled filter structure of this utility model.

[0026] Figure 6 This is a schematic diagram of the fixing mechanism of this utility model.

[0027] The attached diagram is labeled as follows: 1. Outer shell; 2. Sealing cap; 3. Mounting frame; 4. Flame-retardant resin layer; 5. Mica sheet layer; 6. Ceramic fiber layer; 7. Lithium battery body; 8. Through hole; 9. Snake-shaped fin; 10. Heat dissipation channel; 11. Fixing frame; 12. Fan; 13. Filter screen; 14. Handle; 15. Insert frame; 16. Stabilizing sleeve; 17. Stabilizing rod; 18. Spring; 19. Fixing plate; 20. Rubber layer; 21. Sealing ring; 22. Protrusion; 23. Threaded rod; 24. Grip. Detailed Implementation

[0028] 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.

[0029] The embodiments disclosed in this application are as follows: Figure 1-6 The lithium battery casing with a built-in explosion-proof partition shown includes a casing body 1, a sealing cover 2 hinged to one side of the casing body 1, a mounting frame 3 inside the casing body 1, and an explosion-proof mechanism inside the mounting frame 3.

[0030] The explosion-proof mechanism includes a flame-retardant resin layer 4 fixedly installed on the inner wall of the mounting frame 3, a mica sheet layer 5 fixedly installed on one side of the flame-retardant resin layer 4, a ceramic fiber layer 6 fixedly installed on one side of the mica sheet layer 5, a lithium battery body 7 installed inside the ceramic fiber layer 6, through holes 8 are opened on the surfaces of the mounting frame 3, the flame-retardant resin layer 4 and the mica sheet layer 5, a serpentine fin 9 is fixedly installed inside the through holes 8, one end of the serpentine fin 9 is connected to the ceramic fiber layer 6, a heat dissipation channel 10 is opened on the surface of the mounting frame 3, and the other end of the serpentine fin 9 is connected to the heat dissipation channel 10.

[0031] The ceramic fiber layer 6 can play a certain role in heat insulation and slow down the heat transfer. When the heat continues to be transferred, the mica sheet layer 5 has good insulation and flame retardant properties, which can prevent the flame and heat from spreading further. Even if the ceramic fiber layer 6 is damaged at high temperature, the mica sheet layer 5 can effectively block the flame and heat and prevent them from spreading to the flame retardant resin layer 4.

[0032] Furthermore, the flame-retardant resin layer 4, as the outermost layer of the explosion-proof mechanism, has high strength and flame-retardant properties, and can withstand certain pressure and heat, further protecting the outer shell 1 from damage and preventing fragments generated by the lithium battery explosion from flying to the outside.

[0033] When the lithium battery body 7 generates heat during operation, the heat is first transferred to the ceramic fiber layer 6. Since the ceramic fiber layer 6 has a certain thermal conductivity, the heat will be conducted through the ceramic fiber layer 6 to the serpentine fin 9 connected to it. The serpentine fin 9 passes through the through hole 8, with one end connected to the ceramic fiber layer 6 and the other end connected to the heat dissipation channel 10 on the surface of the mounting frame 3. The serpentine design increases the surface area of ​​the fins and improves the heat dissipation efficiency. The heat is transferred to the heat dissipation channel 10 through the serpentine fin 9.

[0034] Reference Figure 2-4 As shown, a fixed frame 11 is provided through one side of the outer shell 1. A fan 12 is installed inside the fixed frame 11. A filter screen 13 is slidably arranged inside the fixed frame 11. A handle 14 is fixedly arranged on one side of the filter screen 13. Slots are provided on the surfaces of both the fixed frame 11 and the handle 14. An insert frame 15 is inserted into the slot. The insert frame 15 is connected to the handle 14 by bolts.

[0035] The fan 12 installed inside the fixed frame 11 that runs through one side of the outer casing 1 starts to work. The airflow generated by the fan 12 enters the heat dissipation channel 10 through the fixed frame 11, which accelerates the airflow inside the heat dissipation channel 10, thereby quickly carrying the heat out of the outer casing 1. The filter 13 is installed inside the fixed frame 11 and can filter impurities in the air to prevent impurities from entering the interior of the outer casing 1 and affecting the normal operation of the lithium battery. The filter 13 can be disassembled and cleaned through the handle 14.

[0036] Reference Figure 5-6 As shown, a fixing mechanism is provided on one side of the ceramic fiber layer 6. The fixing mechanism includes multiple stabilizing sleeves 16 fixedly disposed on one side of the ceramic fiber layer 6. A stabilizing rod 17 is slidably disposed inside the stabilizing sleeve 16. A spring 18 is fixedly disposed outside the stabilizing sleeve 16 and the stabilizing rod 17. A fixing plate 19 is fixedly disposed at one end of the spring 18 and the stabilizing rod 17. A rubber layer 20 is fixedly disposed on one side of the fixing plate 19.

[0037] When placing the lithium battery body 7, the fixing plate 19 is pushed first, which in turn compresses the spring 18 to deform, thereby driving the stabilizer 17 into the interior of the stabilizer sleeve 16. After the lithium battery body 7 is completely placed inside the ceramic fiber layer 6, the spring 18 pushes the fixing plate 19 and the rubber layer 20 to firmly fix the lithium battery body 7. The rubber layer 20 plays a role in buffering and protecting the surface of the lithium battery. At the same time, the cooperation between the stabilizer 17 and the spring 18 can effectively reduce the impact of external vibration on the lithium battery.

[0038] Reference Figure 1 , 4 As shown, a sealing ring 21 is fixedly installed at the bottom of the sealing cover 2, and a protrusion 22 is fixedly installed on one side of the sealing cover 2. The outer shell 1 is made of stainless steel. Threaded holes are opened on the surfaces of the protrusion 22 and the outer shell 1. A threaded rod 23 is threadedly connected inside the threaded hole, and a handle 24 is threadedly connected to one side of the threaded rod 23.

[0039] The outer casing 1 is sealed, and the sealing cover 2 is rotated onto the outer casing 1 through the hinge. The sealing ring 21 at the bottom of the sealing cover 2 can effectively prevent external dust, moisture, etc. from entering the interior of the outer casing 1, ensuring the stability of the working environment of the internal lithium battery body 7;

[0040] After the protrusion 22 on one side of the sealing cover 2 is aligned with the threaded hole on the surface of the outer shell 1, the threaded rod 23 is screwed into the threaded hole, and the threaded rod 23 is tightened by rotating the handle 24, thereby firmly fixing the sealing cover 2 to the outer shell 1.

[0041] Working principle of this utility model:

[0042] This utility model is a lithium battery shell with a built-in explosion-proof layer. When using the device, firstly, the lithium battery body 7 is placed inside the ceramic fiber layer 6. The ceramic fiber layer 6, mica sheet layer 5 and flame-retardant resin layer 4 provide initial protection for the lithium battery. The ceramic fiber layer 6 has good heat insulation and certain thermal conductivity, and can initially absorb the heat generated by the lithium battery.

[0043] When placing the lithium battery body 7, the fixing plate 19 is pushed first, which in turn compresses the spring 18 to deform, thereby driving the stabilizer 17 into the interior of the stabilizer sleeve 16. After the lithium battery body 7 is completely placed inside the ceramic fiber layer 6, the spring 18 pushes the fixing plate 19 and the rubber layer 20 to firmly fix the lithium battery body 7. The rubber layer 20 plays the role of buffering and protecting the surface of the lithium battery. At the same time, the cooperation of the stabilizer 17 and the spring 18 can effectively reduce the impact of external vibration on the lithium battery.

[0044] Then, the outer casing 1 is closed, and the sealing cover 2 is rotated onto the outer casing 1 through the hinge. The sealing ring 21 at the bottom of the sealing cover 2 can effectively prevent external dust, moisture, etc. from entering the interior of the outer casing 1, ensuring the stability of the working environment of the internal lithium battery body 7;

[0045] After the protrusion 22 on one side of the sealing cover 2 is aligned with the threaded hole on the surface of the outer shell 1, the threaded rod 23 is screwed into the threaded hole, and the threaded rod 23 is tightened by rotating the handle 24, thereby firmly fixing the sealing cover 2 to the outer shell 1.

[0046] When the lithium battery body 7 generates heat during operation, the heat is first transferred to the ceramic fiber layer 6. Since the ceramic fiber layer 6 has a certain thermal conductivity, the heat will be conducted through the ceramic fiber layer 6 to the serpentine fin 9 connected to it. The serpentine fin 9 passes through the through hole 8, with one end connected to the ceramic fiber layer 6 and the other end connected to the heat dissipation channel 10 on the surface of the mounting frame 3. The serpentine design increases the surface area of ​​the fins and improves the heat dissipation efficiency. The heat is transferred to the heat dissipation channel 10 through the serpentine fin 9.

[0047] At the same time, the fan 12 installed in the fixed frame 11 that runs through one side of the outer casing 1 starts to work. The airflow generated by the fan 12 enters the heat dissipation channel 10 through the fixed frame 11, which accelerates the airflow inside the heat dissipation channel 10, thereby quickly carrying the heat out of the outer casing 1. The filter screen 13 is installed in the fixed frame 11 and can filter impurities in the air to prevent impurities from entering the inner casing 1 and affecting the normal operation of the lithium battery. The filter screen 13 can be disassembled and cleaned through the handle 14.

[0048] If the lithium battery body 7 experiences thermal runaway or short circuit, the ceramic fiber layer 6 can first play a certain role in heat insulation and slow down the heat transfer. When the heat continues to transfer, the mica sheet layer 5 has good insulation and flame retardant properties, which can prevent the flame and heat from spreading further. Even if the ceramic fiber layer 6 is damaged at high temperature, the mica sheet layer 5 can effectively block the flame and heat and prevent it from spreading to the flame retardant resin layer 4.

[0049] Furthermore, the flame-retardant resin layer 4, as the outermost layer of the explosion-proof mechanism, has high strength and flame-retardant properties, and can withstand certain pressure and heat, further protecting the outer shell 1 from damage and preventing fragments generated by the lithium battery explosion from flying to the outside.

[0050] When the filter screen 13 needs to be cleaned, unscrew the bolt on one side of the handle 14, then pull the insert frame 15 outward to pull the insert frame 15 out of the slot on the surface of the handle 14. Then, hold the handle 14 and pull the filter screen 13 out of the fixed frame 11.

[0051] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A lithium battery casing with a built-in explosion-proof separator, comprising a casing body (1), characterized in that: A sealing cover (2) is hinged to one side of the outer shell (1), and an installation frame (3) is provided inside the outer shell (1). An explosion-proof mechanism is provided inside the installation frame (3). The explosion-proof mechanism includes a flame-retardant resin layer (4) fixedly installed on the inner wall of the mounting frame (3), a mica sheet layer (5) fixedly installed on one side of the flame-retardant resin layer (4), a ceramic fiber layer (6) fixedly installed on one side of the mica sheet layer (5), a lithium battery body (7) installed inside the ceramic fiber layer (6), through holes (8) are opened on the surfaces of the mounting frame (3), the flame-retardant resin layer (4) and the mica sheet layer (5), a snake-shaped fin (9) is fixedly installed inside the through hole (8), one end of the snake-shaped fin (9) is connected to the ceramic fiber layer (6), a heat dissipation channel (10) is opened on the surface of the mounting frame (3), and the other end of the snake-shaped fin (9) is connected to the heat dissipation channel (10).

2. The lithium battery casing with a built-in explosion-proof separator according to claim 1, characterized in that: A fixed frame (11) is provided through one side of the outer shell (1), a fan (12) is installed inside the fixed frame (11), a filter screen (13) is slidably provided inside the fixed frame (11), and a handle (14) is fixedly provided on one side of the filter screen (13).

3. The lithium battery casing with a built-in explosion-proof separator according to claim 2, characterized in that: The surfaces of the fixed frame (11) and the handle (14) are provided with slots, and the slots are fitted with insert frames (15), which are connected to the handle (14) by bolts.

4. The lithium battery casing with a built-in explosion-proof separator according to claim 1, characterized in that: A fixing mechanism is provided on one side of the ceramic fiber layer (6). The fixing mechanism includes a plurality of stabilizing sleeves (16) fixedly disposed on one side of the ceramic fiber layer (6). A stabilizing rod (17) is slidably disposed inside the stabilizing sleeve (16). A spring (18) is fixedly installed on the outside of the stabilizing sleeve (16) and the stabilizing rod (17). A fixing plate (19) is fixedly installed at one end of the spring (18) and the stabilizing rod (17). A rubber layer (20) is fixedly installed on one side of the fixing plate (19).

5. The lithium battery casing with a built-in explosion-proof separator according to claim 1, characterized in that: A sealing ring (21) is fixedly provided at the bottom of the sealing cover (2), and a protrusion (22) is fixedly provided on one side of the sealing cover (2). The outer shell (1) is made of stainless steel.

6. The lithium battery casing with a built-in explosion-proof separator according to claim 5, characterized in that: Both the protrusion (22) and the outer shell (1) have threaded holes on their surfaces. A threaded rod (23) is threaded inside the threaded hole, and a handle (24) is threaded on one side of the threaded rod (23).

Images