Nanometer injection molding lithium battery cover plate

Abstract

The utility model discloses a nanometer injection molding lithium battery cover plate, which belongs to the technical field of lithium battery cover plates, and comprises a battery cover plate, and the battery cover plate is clamped with a lower plastic plate; a nanometer plastic ring, a pole and a fixing ring are arranged in the pole leading-out hole, and the pole and the fixing ring are connected in a clamped mode through the nanometer plastic ring; the fixing ring is clamped between the lower plastic plate and the battery cover plate, a groove for placing the fixing ring is formed in the lower plastic plate, and a clamping space for clamping the fixing ring is defined by the battery cover plate and the groove; an outer edge surrounding the fixing ring is arranged on the outer side of the fixing ring, and the outer edge is clamped in the clamping space; the utility model has the beneficial effects that the split type clamping structure is adopted, so that the fixing ring and the lower plastic plate are convenient to disassemble, and the service life of the lower plastic plate is prolonged.

Description

Technical field:

[0001] The utility model belongs to the technical field of lithium battery cover plates, and more specifically relates to a nano-injection-molded lithium battery cover plate. Background technology:

[0002] As an important component of lithium batteries, the battery cover plays an important role in sealing and safety. The electrode columns on the existing battery cover are generally fixed to the battery cover by injection molding, and then buckled on the lower plastic plate. In the assembly process, an additional sealing ring is required to ensure the sealing between the electrode column and the battery cover. This makes the assembly cumbersome, and the sealing may weaken over time.

[0003] The national utility model patent with patent number 202322077346.9 discloses a battery top cover structure and a battery. The electrode column is fixed to the battery top cover and the lower plastic plate through a nano injection molding process, which solves the above problems very well. However, during the injection process, the rapidly injected electrolyte will cause impact on the electrode column, causing damage to the electrode column and affecting the service life of the lithium battery; during maintenance, the battery cover needs to be replaced as a whole, which increases the maintenance cost and reduces the service life of the battery cover. Utility model content:

[0004] In order to solve the above problems and overcome the shortcomings of the prior art, the utility model provides a nano-injection-molded lithium battery cover;

[0005] The first technical problem to be solved is that the electrode column is easily damaged due to the impact of the injected electrolyte, which causes the entire battery cover to need to be replaced, reducing the service life of the battery cover and increasing maintenance costs.

[0006] The specific technical solution of the utility model to solve the above technical problems is as follows: the nano-injection-molded lithium battery cover comprises a battery cover, the battery cover is provided with an electrode lead-out hole, a liquid injection hole, and an explosion-proof valve assembly; a lower plastic plate is provided below the battery cover, and the battery cover is clamped with the lower plastic plate;

[0007] The electrode lead-out hole is provided with a nano plastic ring, a pole and a fixing ring, the pole and the fixing ring are both provided with a plurality of nano holes on their surfaces, and the pole and the fixing ring are connected by the nano plastic ring;

[0008] The fixing ring is clamped between the lower plastic plate and the battery cover plate. The fixing ring and the lower plastic plate are of split design. The fixing ring is arranged on the lower plastic plate. A groove for placing the fixing ring is provided on the lower plastic plate. The position of the groove corresponds to the position of the electrode lead-out hole. The outer diameter of the groove is larger than the outer diameter of the electrode lead-out hole. The battery cover plate and the groove enclose a clamping space for clamping the fixing ring. An outer edge surrounding the fixing ring is arranged on the outer side of the fixing ring, and the outer edge is clamped in the clamping space.

[0009] Furthermore, a limiting component for clamping and limiting the nano plastic ring is provided on the fixing ring, and the limiting component includes a limiting groove and a buckle.

[0010] Furthermore, the cross-section of the fixing ring is L-shaped, and the fixing ring includes a longitudinal end and a transverse end, and the upper end surface of the transverse end is provided with a limiting groove for limiting the nano plastic ring; the longitudinal end is provided with a preset number of buckles to prevent the nano plastic ring from moving, and the buckles are arranged at intervals around the fixing ring.

[0011] Furthermore, the buckle is in a constricted shape with a narrow opening.

[0012] Furthermore, the nanoplastic ring includes a nanoplastic ring body and a snap ring snapped with a fixing ring, the nanoplastic ring body is arranged on the upper end surface of the battery cover plate located at the electrode lead-out hole; the snap ring is arranged inside the nanoplastic ring body, and a preset number of snap blocks adapted to the buckle are arranged between the snap ring and the nanoplastic ring body.

[0013] Furthermore, the lower end surface of the clamping ring is fitted with the limiting groove, and the lower end surface of the clamping ring is provided with a limiting boss matched with the limiting groove.

[0014] Furthermore, a preset number of engaging posts are provided on the lower plastic plate, and the engaging posts are distributed on both sides of the lower plastic plate for engaging with the battery cover. The lower end surface of the battery cover is provided with a slot corresponding to the engaging post, and the engaging post is engaged in the slot.

[0015] The beneficial effects of the utility model are:

[0016] One advantage of the utility model is that the fixing ring is clamped between the battery cover and the lower plastic plate, and the fixing ring passes through the battery cover and is clamped with the pole via the nano plastic ring. Compared with the structure in which the electrode pole is directly fixed to the battery cover and the lower plastic plate as a whole by injection molding, the split clamping structure makes it easy to disassemble the fixing ring and the lower plastic plate, thereby increasing the service life of the lower plastic plate and solving the problem that the pole is easily damaged by the impact of the injected electrolyte, resulting in the need to replace the entire battery cover and the lower plastic plate, thereby reducing the service life of the battery cover and increasing the maintenance cost.

[0017] One advantage of the utility model is that a positioning groove for placing a fixing ring is provided on the lower plastic plate, and an outer edge surrounding the fixing ring is provided on the outer side of the fixing ring, and the outer edge is clamped in the clamping space; the height of the outer edge is slightly greater than the depth of the positioning groove, and an interference fit is generated between the outer edge and the battery cover and the lower plastic plate, which can ensure the sealing between the fixing ring and the battery cover, and can also tightly fix the position of the fixing ring in the positioning groove to prevent the fixing ring from moving in the positioning groove, thereby increasing stability.

[0018] One advantage of the utility model is that a nano plastic ring is directly molded in the gap between the pole and the hole wall of the fixing ring by nano injection molding process, a plurality of nano holes are arranged on the surface of the pole and the fixing ring, thereby improving the sealing performance, and a limiting component for clamping and limiting the nano plastic ring is provided on the fixing ring, and the limiting component can clamp and limit the nano plastic ring to prevent the nano plastic ring from moving between the pole and the fixing ring, thereby affecting the sealing effect. Description of the drawings:

[0019] Attached Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model;

[0020] Attached Figure 2 This is a schematic diagram of the assembly structure of the electrode lead-out hole of the utility model;

[0021] Attached Figure 3 It is a schematic diagram of the overall structure of the utility model;

[0022] Attached Figure 4 This is a schematic diagram of the assembly structure of the fixing ring of the utility model;

[0023] Attached Figure 5 It is a schematic diagram of the cross-sectional structure of the fixing ring of the utility model;

[0024] Attached Figure 6 This is a schematic diagram of the structure of the nano plastic ring of the utility model; in the attached figure:

[0025] 1. Battery cover; 2. Electrode lead-out hole; 21. Nano plastic ring; 211. Nano plastic ring body; 212. Snap ring; 213. Block; 214. Limiting boss; 22. Pole; 23. Fixing ring; 231. Outer edge; 232. Buckle; 233. Limiting groove; 3. Liquid injection hole; 4. Explosion-proof valve assembly; 5. Lower plastic plate; 51. Positioning groove. Specific implementation method:

[0026] In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "left", "right", "rear", "lower left", "upper right", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] Specific implementation of the utility model: the nano-injection-molded lithium battery cover comprises a battery cover 1, on which an electrode lead-out hole 2, a liquid injection hole 3, and an explosion-proof valve assembly 4 are respectively opened;

[0028] The explosion-proof valve assembly 4 includes an explosion-proof valve mounting hole, an explosion-proof valve and an explosion-proof valve patch. The battery cover 1 is provided with an explosion-proof valve mounting hole, the explosion-proof valve is arranged in the explosion-proof valve mounting hole, and the explosion-proof valve patch is pasted on the explosion-proof valve mounting hole.

[0029] A lower plastic plate 5 is arranged below the battery cover 1, and the battery cover 1 is clamped with the lower plastic plate 5. A preset number of clamping columns are arranged on the lower plastic plate 5, and the clamping columns are distributed on both sides of the lower plastic plate 5 for clamping with the battery cover 1. The lower end surface of the battery cover 1 is provided with a clamping groove corresponding to the clamping column, and the clamping column is clamped in the clamping groove.

[0030] As a preferred embodiment of the present utility model,

[0031] The electrode lead-out hole 2 is provided with a nano plastic ring 21, a pole 22 and a fixing ring 23.

[0032] The fixing ring 23 is arranged on the upper end surface of the lower plastic plate 5, and the fixing ring 23 is clamped between the battery cover plate 1 and the lower plastic plate 5. The outer wall of the fixing ring 23 is in contact with the inner wall of the electrode lead-out hole 2. The fixing ring 23 passes through the battery cover plate 1 and is clamped with the pole 22. The pole 22 and the fixing ring 23 are clamped and connected by the nano plastic ring 21.

[0033] Compared with the structure in which the electrode column is directly fixed to the battery cover 1 and the lower plastic plate 5 by injection molding, this split-type clamping structure is adopted, and the fixing ring 23 is clamped between the battery cover 1 and the lower plastic plate 5, so that the fixing ring 23 and the lower plastic plate 5 are easy to disassemble, and the efficiency of repeated disassembly and assembly is high, which increases the service life of the lower plastic plate 5 and solves the problem that the electrode column 22 is impacted by the injected electrolyte and is easily damaged, resulting in the entire battery cover 5, including the lower plastic plate 5. Replacement, reducing the service life of the battery cover and increasing maintenance costs.

[0034] As a preferred embodiment of the present utility model,

[0035] The lower plastic plate 5 is provided with a positioning groove 51 for placing the fixing ring 23, and the positioning groove 51 is arranged directly below the electrode lead-out hole 2. The outer diameter of the positioning groove 51 is larger than the outer diameter of the electrode lead-out hole 2. When the battery cover 1 is snapped with the lower plastic plate 5, the battery cover 1 and the positioning groove 51 enclose a snap-in space for snapping the fixing ring 23; an outer edge 231 surrounding the fixing ring 23 is arranged on the outer side of the fixing ring 23, and the outer edge 231 is snapped in the snap-in space; the height of the outer edge 231 is slightly larger than the depth of the positioning groove 51, so when the battery cover 1 and the lower plastic plate 5 are buckled, an interference fit is generated between the outer edge 231 and the battery cover 1 and the lower plastic plate 5.

[0036] With this structure, the fixing ring 23 is snap-connected with the battery cover 1 and the lower plastic plate 5 via the outer edge 231, and the outer edge 231 can ensure the sealing between the fixing ring 23 and the battery cover 1, wherein the interference fit between the outer edge 231 and the battery cover 1 and the lower plastic plate 5 can also tightly fix the position of the fixing ring 23 in the positioning groove 51, preventing the fixing ring 23 from moving in the positioning groove 51, thereby increasing stability.

[0037] In addition, in order to ensure air tightness, nano-treatment of metal parts is added before integral injection molding of the fixing ring 23 and the pole 22. By soaking the working surface with a weak acid treatment agent, the metal surface is further formed with smaller nano-scale holes, and the surfaces of the pole 22 and the fixing ring 23 are treated to form a number of nano-pores; the pole 22 is placed in the electrode lead-out hole 2, and a nano-plastic ring 21 is directly formed in the gap between the pole 22 and the hole wall of the fixing ring 23 by a nano-injection molding process. The advantage of adopting this design is that the traditional fluororubber sealing ring is replaced by nano-materials, which truly realizes the halogen-free requirements and significantly reduces the cost. At the same time, the adhesion between the pole 22 and the plastic is increased, and the thrust is twice as large as the traditional structure (the thrust of the pole 22 of the traditional pole 22 assembly structure can reach 1500-1600N, and the thrust of the pole 22 of the nano-injection pole assembly can reach 3500-3600N). Since the molecular structure of the plastic material used in nano injection molding is small and the adhesive force between the rubber and metal parts is strong, the problem of airtightness is also solved.

[0038] As a preferred embodiment of the present utility model,

[0039] The fixing ring 23 is provided with a limiting component for clamping and limiting the nano plastic ring 21, and the limiting component includes a limiting groove 233 and a buckle 232;

[0040] The cross-section of the fixing ring 23 is L-shaped. The fixing ring 23 includes a longitudinal end and a transverse end. The upper end surface of the transverse end is provided with a limiting groove 233 for limiting the nano plastic ring 21, and the limiting groove 233 is arranged around the fixing ring 23; the longitudinal end is provided with a preset number of buckles 232 for preventing the nano plastic ring 21 from moving, and the buckles 232 are arranged at intervals around the fixing ring 23, and the buckles 232 are in a narrow opening shape.

[0041] In the gap between the pole 22 and the hole wall of the fixing ring 23, a nano plastic ring 21 is directly formed by a nano injection molding process. The nano plastic ring 21 is clamped with the pole 22 and the fixing ring 23 respectively. The nano plastic ring 21 includes a nano plastic ring body 211 and a clamping ring 212. The nano plastic ring body 211 is arranged on the upper end surface of the battery cover plate 1 located at the electrode lead-out hole 2; the clamping ring 212 is arranged inside the nano plastic ring body 211, and the clamping ring 212 is arranged between the pole 22 and the fixing ring 23, and is used to clamp the pole 22 and the fixing ring 23; A block 213 matched with the buckle 232 is provided at the contact point between the nano plastic ring 21 and the buckle 232, and the block 213 is provided between the snap ring 212 and the nano plastic ring body 211; a limiting boss 214 matched with the limiting groove 233 is provided at the contact point between the nano plastic ring 21 and the limiting groove 233, and the block 213 and the buckle 232 and the limiting boss 214 and the limiting groove 233 cooperate with each other, so as to engage and limit the nano plastic ring 21, and prevent the nano plastic ring 21 from moving with the pole 22 and the fixing ring 23, thereby affecting the sealing effect.

[0042] As a supplementary explanation of the present utility model, there are two electrode lead-out holes 2, namely a positive lead-out hole and a negative lead-out hole; the positive lead-out hole is provided with a positive electrode nano-plastic ring, a positive electrode column and a positive electrode fixing ring, and the negative electrode lead-out hole is provided with a negative electrode nano-plastic ring, a negative electrode column and a negative electrode fixing ring; the lower plastic plate 5 is respectively provided with grooves for placing the positive electrode fixing ring and the negative electrode fixing ring; the connection relationship between the structures is referred to above and will not be repeated here.

[0043] It should be noted that the utility model is a nano-injection-molded lithium battery cover. When working,

[0044] Place the positive electrode fixing ring and the negative electrode fixing ring in the grooves corresponding to the lower plastic plate 5 and the positive electrode lead-out hole and the negative electrode lead-out hole, respectively, and snap-fit ​​the lower plastic plate 5 with the battery cover 1. At this time, the outer edges of the positive electrode fixing ring and the negative electrode fixing ring are respectively fitted with the lower end surface of the battery cover 1. The positive electrode fixing ring and the negative electrode fixing ring are snap-fitted with the battery cover 1 and the lower plastic plate 5 under the action of the outer edges. The outer edges 231 can prevent the fixing ring 23 from falling off while ensuring the sealing between the fixing ring 23 and the battery cover 1;

[0045] The positive electrode column is placed in the positive electrode lead-out hole, and a positive electrode nano-plastic ring is directly formed in the gap between the positive electrode column and the hole wall of the positive electrode fixing ring through a nano-injection molding process; the negative electrode column is placed in the negative electrode lead-out hole, and a negative electrode nano-plastic ring is directly formed in the gap between the negative electrode column and the hole wall of the negative electrode fixing ring through a nano-injection molding process.

[0046] When the pole 22 is impacted by the injected electrolyte and damaged, the battery cover 1 and the lower plastic plate 5 can be removed to replace the battery cover 1, which solves the problem of increasing maintenance costs when the pole 22 is impacted by the injected electrolyte and damaged.

[0047] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A nano-injection-molded lithium battery cover, comprising a battery cover (1), wherein the battery cover (1) is provided with an electrode lead-out hole (2), a liquid injection hole (3), and an explosion-proof valve assembly (4); a lower plastic plate (5) is arranged below the battery cover (1), and the battery cover (1) and the lower plastic plate (5) are clamped together, characterized in that: The electrode lead-out hole (2) is provided with a nano plastic ring (21), an electrode column (22) and a fixing ring (23); the surfaces of the electrode column (22) and the fixing ring (23) are both provided with nano holes; the electrode column (22) and the fixing ring (23) are connected by snapping together through the nano plastic ring (21); The fixing ring (23) is clamped between the lower plastic plate (5) and the battery cover plate (1); the fixing ring (23) is arranged on the lower plastic plate (5); a positioning groove (51) for placing the fixing ring (23) is provided on the lower plastic plate (5); the position of the positioning groove (51) corresponds to the position of the electrode lead-out hole (2); the outer diameter of the positioning groove (51) is larger than the outer diameter of the electrode lead-out hole (2); the battery cover plate (1) and the positioning groove (51) enclose a clamping space for clamping the fixing ring (23); an outer edge (231) surrounding the fixing ring (23) is arranged on the outer side of the fixing ring (23); the outer edge (231) is clamped in the clamping space.

2. The nano-injection molded lithium battery cover according to claim 1, characterized in that The fixing ring (23) is provided with a limiting assembly for clamping and limiting the nano plastic ring (21), and the limiting assembly comprises a limiting groove (233) and a buckle (232).

3. A nano-injection molded lithium battery cover according to claim 2, characterized in that The cross section of the fixing ring (23) is L-shaped. The fixing ring (23) comprises a longitudinal end and a transverse end. The upper end surface of the transverse end is provided with a limiting groove (233) for limiting the nano plastic ring (21). The longitudinal end is provided with a preset number of buckles (232) for preventing the nano plastic ring (21) from moving. The buckles (232) are arranged at intervals around the fixing ring (23).

4. The nano-injection molded lithium battery cover according to claim 3, characterized in that The buckle (232) is in a narrow opening shape.

5. The nano-injection molded lithium battery cover according to claim 1, characterized in that The nano plastic ring (21) comprises a nano plastic ring body (211) and a snap ring (212) snap-connected with a fixing ring (23); the nano plastic ring body (211) is arranged on the upper end surface of the battery cover (1) located at the electrode lead-out hole (2); the snap ring (212) is arranged inside the nano plastic ring body (211); a preset number of snap blocks (213) adapted to the snap buckles (232) are arranged between the snap ring (212) and the nano plastic ring body (211).

6. The nano-injection molded lithium battery cover according to claim 5, characterized in that The lower end surface of the clamping ring (212) is in contact with the limiting groove (233), and the lower end surface of the clamping ring (212) is provided with a limiting boss (214) that matches the limiting groove (233).

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