Recyclable material battery top cover plate structure

Abstract

The utility model discloses a recoverable material battery top cover plate structure, which belongs to the technical field of new energy batteries, and is characterized by comprising a top cover plate main body made of a single recoverable metal material, and a positive pole column and a negative pole column are respectively arranged on two sides in the top cover plate main body in a penetrating manner. A pressure relief channel is formed in the middle of the interior of the top cover plate body, an anti-explosion film is arranged in the pressure relief channel, a liquid injection hole is formed in the right side of the interior of the top cover plate body, and a sealing structure is arranged in the liquid injection hole. The sealing structure comprises a fixing screw, the fixing screw is in threaded connection to the top of the interior of the liquid injection hole, a connecting column integrated with the fixing screw is arranged at the bottom of the fixing screw, a rubber plug is rotationally connected to the bottom of the surface of the connecting column, and the surface of the rubber plug is in close contact with the inner wall of the liquid injection hole, so that the effect is achieved.

Description

Technical Field

[0001] This utility model relates to the field of new energy battery technology, and in particular to a battery top cover structure made of recyclable materials. Background Technology

[0002] With the rapid development of the new energy industry, lithium batteries are being used more and more widely. As a key component of lithium batteries, the battery top cover plays an important role in sealing the internal space of the battery, enabling electrode lead-out, and installing various safety devices.

[0003] In the new energy vehicle power battery manufacturing industry, the existing battery cover structure mainly uses riveting and welding to fix the terminals, and sealing is mainly achieved through sealing rings. The disadvantages of this approach are: a large number of parts, relatively complex assembly, poor quality stability, and long-term sealing problems that can lead to safety hazards. In addition, existing battery covers are mostly for single use, and the liquid injection port is fixed and closed, making it impossible to recycle and reuse them, resulting in significant resource waste.

[0004] An existing patent (publication number: CN218632248U) discloses a battery cover plate that can be recycled and refilled. The solution provided by this utility model has a simple structure, good sealing effect, high connection strength and can realize refilling.

[0005] To address the aforementioned issues, existing patents offer solutions. While these solutions enable secondary electrolyte injection, the sealing screws used, when connected to the top cover's electrolyte injection hole, cause friction between the sealing screw and the hole wall. This leads to the sealing screws easily producing particles and burrs, which can easily fall into the battery and cause a short circuit, thus affecting the battery's safety.

[0006] To address this, a battery top cover structure made of recyclable materials is proposed. Utility Model Content

[0007] The purpose of this invention is to provide a battery top cover structure made of recyclable materials, which can solve the problem that when the existing sealing screw is connected to the top cover liquid injection hole, friction occurs between the sealing screw and the wall of the liquid injection hole, making the sealing screw prone to generating particles and burrs, which can easily fall into the battery and cause a short circuit, thus affecting the battery's safety.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a recyclable material battery top cover structure, comprising a top cover body made of a single recyclable metal material, a positive electrode post and a negative electrode post respectively penetrating through both sides of the inside of the top cover body, a pressure relief channel provided in the middle of the inside of the top cover body, and an explosion-proof membrane provided inside the pressure relief channel, and an injection hole provided on the right side of the inside of the top cover body, and a sealing structure provided inside the injection hole;

[0009] The sealing structure includes a fixing screw, which is threaded to the top of the injection hole. The bottom of the fixing screw is provided with an integral connecting post, and a rubber plug is rotatably connected to the bottom of the surface of the connecting post. The surface of the rubber plug is in close contact with the inner wall of the injection hole.

[0010] Preferably, the explosion-proof film is made of recyclable metal foil film, and the bottom of the metal foil film is provided with a number of preset weak points, which are distributed in a cross shape.

[0011] Preferably, the pressure relief channel penetrates the main body of the top cover plate and communicates with the inside of the battery. The inner wall of the pressure relief channel is provided with guide ridges, and the guide ridges are inclined from the inside of the battery to the outside.

[0012] Preferably, the explosion-proof film has notches on both sides, and the inner walls of the notches are connected to the top and bottom of the main body of the top cover plate, respectively.

[0013] Preferably, the surfaces of the positive and negative terminals are covered with insulating sleeves, the bottom of which extends to the bottom of the top cover plate body, and the tops of the positive and negative terminals are provided with threaded connection portions integral with them.

[0014] Preferably, a limiting boss is provided at one end of the insulating sleeve near the inside of the battery, and the top of the limiting boss is connected to the bottom of the top cover plate body.

[0015] Preferably, a sealing ring is embedded in the bottom of the fixing screw, and the surface of the sealing ring is in close contact with the inner wall of the injection hole.

[0016] Preferably, the contact between the rubber stopper and the injection hole is an interference fit, the bottom of the inner wall of the injection hole is provided with a recess, and the rubber stopper is provided with a protrusion that can be engaged in the recess.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This application, by setting a sealing structure and using a combination of fixing screws and rubber plugs, can effectively prevent liquid leakage, while avoiding the risk of particles and burrs caused by direct friction between the existing sealing screws and the wall of the injection hole falling into the battery and causing a short circuit. This greatly improves the safety of battery use and ensures the reliability and stability of the battery top cover in terms of sealing function.

[0019] 2. This application avoids the recycling and separation problems caused by the combination of multiple materials in the existing cover plate by using a single recyclable metal material for the main body of the cover plate. Therefore, after the battery is scrapped, the recycling and processing cost can be greatly reduced and the material recycling efficiency can be improved. At the same time, the structural components on the top cover plate are all made of recyclable materials, which further improves the recyclability of the entire top cover plate structure. Attached Figure Description

[0020] Figure 1 This is an overall structural diagram of the recyclable material battery top cover plate structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the main body of the top cover plate of this utility model;

[0022] Figure 3 This is a schematic diagram showing the connection between the main body of the top cover plate and the insulating sleeve of this utility model;

[0023] Figure 4 This is a schematic diagram showing the connection between the main body of the top cover plate and the sealing structure of this utility model;

[0024] Figure 5 This is a schematic diagram showing the connection between the explosion-proof membrane and the pressure relief channel of this utility model.

[0025] In the diagram, 1. Top cover plate body; 2. Positive terminal; 3. Negative terminal; 4. Pressure relief channel; 5. Explosion-proof membrane; 6. Injection hole; 7. Sealing structure; 71. Fixing screw; 72. Connecting post; 73. Rubber plug; 8. Insulating sleeve; 9. Threaded connection part; 10. Limiting boss; 11. Sealing ring; 12. Recess; 13. Protrusion. Detailed Implementation

[0026] 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.

[0027] Please see Figure 1-5 The present invention provides the following technical solution:

[0028] A recyclable material battery top cover structure includes a top cover body 1 made of a single recyclable metal material. A positive electrode post 2 and a negative electrode post 3 are respectively provided through the two sides inside the top cover body 1. A pressure relief channel 4 is provided in the middle of the top cover body 1, and an explosion-proof membrane 5 is provided inside the pressure relief channel 4. An injection hole 6 is provided on the right side inside the top cover body 1, and a sealing structure 7 is provided inside the injection hole 6.

[0029] The sealing structure 7 includes a fixing screw 71, which is threaded to the top inside the injection hole 6. The bottom of the fixing screw 71 is provided with an integral connecting post 72, and a rubber stopper 73 is rotatably connected to the bottom of the surface of the connecting post 72. The surface of the rubber stopper 73 is in close contact with the inner wall of the injection hole 6.

[0030] In this embodiment: through the pressure relief channel 4 and the explosion-proof membrane 5, the battery can be precisely ruptured when the internal pressure reaches a certain threshold, and the gas can be quickly discharged through the pressure relief channel 4, improving the explosion-proof efficiency and ensuring the safety of battery use. When injecting electrolyte into the battery, the fixing screw 71 is unscrewed, which drives the connecting column 72 to rise, and the rubber plug 73 is disengaged from the injection hole 6. At this time, electrolyte can be injected. After the injection is completed, the fixing screw 71 is screwed into the injection hole 6, and the connecting column 72 drives the rubber plug 73 to move down until the surface of the rubber plug 73 is in close contact with the inner wall of the injection hole 6, thus sealing the injection hole 6. This sealing structure 7 adopts a combination of fixing screw 71 and rubber plug 73. The rubber plug 73 is in close contact with the inner wall of the injection hole 6, which can effectively prevent electrolyte leakage, ensure the battery's sealing performance, and avoid the risk of particles and burrs caused by direct friction between the existing sealing screw and the wall of the injection hole 6 falling into the battery and causing a short circuit, greatly improving the safety of battery use.

[0031] Specifically, such as Figure 5 As shown, the explosion-proof film 5 is made of recyclable metal foil film, and the bottom of the metal foil film is provided with several preset weak points, which are distributed in a cross shape.

[0032] Specifically, such as Figure 5 As shown, the pressure relief channel 4 penetrates the main body 1 of the top cover plate and is connected to the inside of the battery. The inner wall of the pressure relief channel 4 is provided with guide ridges, and the guide ridges are inclined from the inside of the battery to the outside.

[0033] Specifically, such as Figure 5 As shown, the explosion-proof membrane 5 has notches on both sides, and the inner walls of the notches are connected to the top and bottom of the main body 1 of the top cover plate, respectively.

[0034] In this embodiment: when the internal pressure of the battery rises abnormally, the gas needs to be discharged through the pressure relief channel 4. The guide ribs on the inner wall of the pressure relief channel 4, which are inclined from the inside of the battery to the outside, guide the flow of gas, so that the pressure will act on the explosion-proof membrane 5. Since the bottom of the explosion-proof membrane 5 is provided with several preset weak points distributed in a cross shape, the structural strength of these weak points is relatively low. When the pressure reaches a certain level, the preset weak points will rupture first, so that the explosion-proof membrane 5 can open in a predetermined manner, accurately release the high-pressure gas inside the battery, and avoid serious safety accidents such as battery explosion caused by excessive pressure.

[0035] Specifically, such as Figure 3As shown, the surfaces of the positive terminal 2 and the negative terminal 3 are both covered with insulating sleeves 8, the bottom of which extends to the bottom of the top cover plate body 1, and the top of the positive terminal 2 and the negative terminal 3 are both provided with threaded connection parts 9 integrated with them.

[0036] Specifically, such as Figure 3 As shown, a limiting boss 10 is provided at one end of the insulating sleeve 8 near the inside of the battery, and the top of the limiting boss 10 is connected to the bottom of the top cover plate body 1.

[0037] In this embodiment: the excellent insulation performance of the insulating sleeve 8 ensures the electrical safety of the battery, avoiding battery damage and safety accidents caused by short circuits. The threaded connection part 9 makes the connection between the battery and the external circuit more convenient and reliable, facilitating battery installation and use, and improving the battery's practicality and versatility. The limiting boss 10 ensures that the insulating sleeve 8 is always in the correct position, guaranteeing the stability and reliability of the insulation effect, and further improving the battery's safety and performance stability.

[0038] Specifically, such as Figure 4 As shown, a sealing ring 11 is embedded in the bottom of the fixing screw 71, and the surface of the sealing ring 11 is in close contact with the inner wall of the injection hole 6.

[0039] Specifically, such as Figure 4 As shown, the contact between the rubber stopper 73 and the injection hole 6 is an interference fit. The bottom of the inner wall of the injection hole 6 is provided with a recess 12, and the rubber stopper 73 is provided with a protrusion 13 corresponding to the recess 12, which can be engaged in the recess 12.

[0040] In this embodiment: when the fixing screw 71 is tightened, the sealing ring 11 embedded in the bottom of the fixing screw 71 is compressed and undergoes elastic deformation, tightly fitting the inner wall of the injection hole 6, forming an additional sealing barrier between the fixing screw 71 and the injection hole 6. The sealing ring further enhances the sealing performance of the injection hole 6 and compensates for any minor gaps that may exist between the fixing screw 71 and the injection hole 6. Through the dual design of interference fit and recess-protrusion engagement structure, the sealing performance and connection stability between the rubber stopper 73 and the injection hole 6 are significantly improved. The interference fit enhances the tightness of the seal and prevents liquid from seeping out from the gap between the two. The engagement of the recess 12 and the protrusion 13 effectively prevents the rubber stopper 73 from shifting due to vibration and other factors during battery use, ensuring a long-term stable sealing effect of the injection hole 6 and avoiding the impact of liquid leakage on battery performance and safety.

[0041] Working principle: During battery assembly, the positive terminal 2 and negative terminal 3 are inserted through both sides of the top cover body 1, and an insulating sleeve 8 is fitted on top. The bottom of the insulating sleeve 8 extends to the bottom of the top cover body 1, and the limiting protrusion 10 at one end near the inside of the battery connects to the bottom of the top cover body 1, ensuring that the insulating sleeve 8 is fixed in position. At the same time, the threaded connection part 9 at the top of the positive terminal 2 and negative terminal 3 is used to connect to the external circuit. The threaded structure achieves a reliable and convenient electrical connection, facilitating the installation of the battery into the equipment. When it is necessary to inject electrolyte into the battery, the operator unscrews the fixing screw 71 to fix it. Screw 71 drives the integrated connecting post 72 to rise. Since the connecting post 72 is connected to the rubber plug 73, the rubber plug 73 disengages from the injection hole 6. At this time, the injection hole 6 opens, allowing electrolyte injection. After injection, the fixing screw 71 is screwed into the injection hole 6, and the connecting post 72 drives the rubber plug 73 to move downward. During this process, the rubber plug 73 and the injection hole 6 are in an interference fit. As the rubber plug 73 moves downward, it is squeezed by the inner wall of the injection hole 6, resulting in elastic deformation, which increases the sealing tightness. At the same time, the protrusion 13 on the surface of the rubber plug 73 is embedded into the recess 12 in the injection hole 6. A locking structure is formed to further fix the position of the rubber stopper 73. In addition, the sealing ring 11 embedded in the fixing screw 71 is compressed during the tightening process, undergoes elastic deformation, and fits tightly into the preset groove in the injection hole 6, forming an additional sealing barrier between the fixing screw 71 and the injection hole 6, ultimately achieving efficient sealing of the injection hole 6 and preventing electrolyte leakage. During battery use, if the internal pressure of the battery rises abnormally due to chemical reactions, short circuits, or other reasons, when the pressure reaches a certain threshold, the pressure acts on the explosion-proof membrane 5 in the pressure relief channel 4. Since the explosion-proof membrane 5 is made of recyclable metal... The foil has several pre-set weak points arranged in a cross shape at its bottom. These weak points have relatively low structural strength. Under pressure, the pre-set weak points will rupture first, causing the explosion-proof membrane 5 to open in a predetermined manner. At the same time, the pressure relief channel 4 penetrates the main body 1 of the top cover plate and is connected to the inside of the battery. The guide ribs on its inner wall, which slope from the inside of the battery to the outside, guide the gas discharged from the inside of the battery, so that the high-pressure gas can be discharged from the outside of the battery quickly and smoothly through the pressure relief channel 4, avoiding serious safety accidents such as explosions caused by excessive internal pressure of the battery, and ensuring the safety of battery use.

[0042] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A battery top cover structure made of recyclable material, comprising a top cover body (1) made of a single recyclable metal material, characterized in that: Positive electrode post (2) and negative electrode post (3) are respectively provided through the two sides inside the main body of the top cover plate (1). A pressure relief channel (4) is provided in the middle of the main body of the top cover plate (1), and an explosion-proof membrane (5) is provided inside the pressure relief channel (4). An injection hole (6) is provided on the right side inside the main body of the top cover plate (1), and a sealing structure (7) is provided inside the injection hole (6). The sealing structure (7) includes a fixing screw (71), which is threaded to the top inside the injection hole (6). The bottom of the fixing screw (71) is provided with an integral connecting post (72), and a rubber stopper (73) is rotatably connected to the bottom of the surface of the connecting post (72). The surface of the rubber stopper (73) is in close contact with the inner wall of the injection hole (6).

2. A recyclable material battery top cover plate structure according to claim 1, characterized in that: The explosion-proof film (5) is made of recyclable metal foil film. The bottom of the metal foil film has several preset weak points, and the preset weak points are distributed in a cross shape.

3. A recyclable material battery top cover plate structure according to claim 1, characterized in that: The pressure relief channel (4) penetrates the main body (1) of the top cover plate and communicates with the inside of the battery. The inner wall of the pressure relief channel (4) is provided with guide ridges, and the guide ridges are inclined from the inside of the battery to the outside.

4. A recyclable material battery top cover plate structure according to claim 1, characterized in that: The explosion-proof membrane (5) has notches on both sides, and the inner walls of the notches are connected to the top and bottom of the main body of the top cover plate (1), respectively.

5. A recyclable material battery top cover plate structure according to claim 1, characterized in that: The surfaces of the positive electrode post (2) and the negative electrode post (3) are covered with insulating sleeves (8), the bottom of the insulating sleeves (8) extends to the bottom of the top cover plate body (1), and the top of the positive electrode post (2) and the negative electrode post (3) are provided with threaded connection parts (9) integrated with them.

6. A recyclable material battery top cover plate structure according to claim 5, characterized in that: The insulating sleeve (8) is provided with a limiting boss (10) at one end near the inside of the battery, and the top of the limiting boss (10) is connected to the bottom of the top cover body (1).

7. A recyclable material battery top cover plate structure according to claim 1, characterized in that: A sealing ring (11) is embedded in the bottom of the fixing screw (71), and the surface of the sealing ring (11) is in close contact with the inner wall of the injection hole (6).

8. A recyclable material battery top cover plate structure according to claim 1, characterized in that: The contact between the rubber stopper (73) and the injection hole (6) is an interference fit. The bottom of the inner wall of the injection hole (6) is provided with a recess (12). The rubber stopper (73) is provided with a protrusion (13) that can be engaged in the recess (12) corresponding to the recess (12).

Images