Combined battery cover

Abstract

The utility model relates to a combined type battery cover, which aims at solving the technical problems of high mold cost and low production efficiency caused by various sizes of the existing lithium battery cover, and is characterized in that a modularized splicing structure is adopted, and a standard side cover is matched with a concave-convex groove of an extensible splicing cover in a clamping manner, and is fastened by combining a bolt; and flexible adaptation of the battery packs with different widths is realized. The cover body is manufactured through a glass fiber reinforced plastic mould pressing process, and structural strength and sealing performance are guaranteed. The inner composite heat preservation layer is composed of aerogel felt and polyurethane foam, and light weight and efficient heat barrier performance are both considered. According to the design, a standard module is produced through a set of basic mold, the mold development cost is effectively reduced, rapid assembly and maintenance are supported, the production economy and the adaptation flexibility are remarkably improved, and the battery pack protection requirements in the fields of new energy automobiles and energy storage are met.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery packaging technology, and in particular to a combined battery cover. Background Technology

[0002] With the rapid development of new energy technologies, lithium batteries, as core energy storage devices, are widely used in electric vehicles, energy storage systems, and other fields. The casing structure design of lithium battery packs directly affects the battery's safety, heat dissipation, and production economics. In existing technologies, lithium batteries vary in size due to differences in capacity, requiring battery covers of corresponding sizes to match batteries of different capacities. In particular, battery covers made of fiberglass rely on customized molds for production, resulting in high mold development costs and long cycles, making it difficult to adapt to diverse market demands.

[0003] Traditional battery cover designs typically employ a monolithic molding process, requiring individual molds for different battery sizes. This is particularly problematic in the manufacture of composite materials like fiberglass, where mold costs constitute a significant portion of production costs. This production model not only limits product iteration speed but also leads to resource waste. For example, while aluminum alloy battery casings achieve lightweighting through extrusion and welding techniques, they still require custom molds for different sizes, and the welding process is complex, making it difficult to balance sealing and structural strength. Furthermore, existing battery covers lack modular maintenance capabilities; when a local structure is damaged, the entire casing must be replaced, increasing operating costs.

[0004] In summary, developing a modular battery cover to solve the technical problems of poor size adaptability and high production cost of traditional battery covers is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] To address the problems existing in the background technology, this utility model develops a modular battery cover. Through a modular structure design that allows for splicing, standard unit modules are produced using a basic mold, and then flexibly combined according to battery size requirements, thereby reducing mold development costs and improving production efficiency. This device includes symmetrical side covers on both sides, with at least one splicing cover between the side covers. Each side cover is a quarter-capsule shape, with a quarter-sphere shape at the front and back and a long rectangular shape in the middle. The splicing cover has arc-shaped sides and a long rectangular shape in the middle, and the front-to-back length of the side covers is the same as the front-to-back length of the splicing cover.

[0006] The side cover serves as two sections of the battery cover, and at least one splicing cover connects the side covers. The width of the battery cover is the sum of the widths of the left and right side covers and the widths of the multiple splicing covers in the middle. When packaging lithium batteries of different widths, it is only necessary to increase the number of splicing covers in the middle to create battery covers of different widths.

[0007] Furthermore, a connecting portion is provided between the side cover and the splicing cover. The connecting portion includes at least two grooves and at least two corresponding protrusions. The connecting portion of the left side cover is set as the groove, and the left side of the splicing cover is provided with the protrusion. The connecting portion of the right side cover is set as the protrusion, and the right side of the splicing cover is provided with the groove.

[0008] During installation, the side cover and the splicing cover are locked together by the interlocking of the groove and the protrusion.

[0009] Furthermore, at least three inserts are evenly arranged on the groove, and at least three connecting holes are evenly arranged inside the protrusion, and the inserts and the connecting holes are connected by bolts.

[0010] After the groove and the protrusion are fitted together, the side cover and the support cover are further fixed between the corresponding insert and the connecting hole by bolts.

[0011] Furthermore, the side cover and the splicing cover are provided with protrusions on their periphery, and each of the protrusions of the side cover and the splicing cover has at least one mounting hole.

[0012] The mounting holes are used to connect and install the upper and lower combined battery covers.

[0013] Furthermore, the side cover and the splicing cover are made of fiberglass.

[0014] The side cover and the splicing cover are manufactured using fiberglass molding technology. The inserts in the connecting part are also directly connected during the molding process, ensuring the connection strength of the battery cover. Furthermore, since the width of the battery cover depends on the number of splicing covers used, the molding dies for the side cover and the splicing cover are identical, reducing production costs.

[0015] Furthermore, an insulation layer is provided inside the battery cover.

[0016] Preferably, the insulation layer is a composite insulation layer of aerogel and polyurethane, the inner side of the insulation layer is made of aerogel felt with a thickness of 1-3mm, and the outer side of the insulation layer is made of polyurethane foam with a thickness of 5-10mm.

[0017] The aerogel felt provides efficient thermal insulation, while the polyurethane foam enhances mechanical strength and cushions vibrations. The two are bonded together using adhesives or molding processes. This design balances lightweight (density ≤80 kg / m³) with extreme thermal insulation performance. The high-temperature resistance of the aerogel compensates for the shortcomings of PU. Modular production allows for the prefabrication of composite panels for rapid assembly with fiberglass modules.

[0018] The advantages and beneficial effects of this utility model are as follows: This utility model adopts a modular design and uses standardized molds to produce the side covers and splicing covers. By increasing or decreasing the number of splicing covers, it can adapt to battery packs of different widths, effectively reducing manufacturing costs. The fiberglass molding process allows for one-piece molding of the connecting structure, simplifying mold design and reducing unit production costs. The side covers and splicing covers are engaged by interlocking grooves and secured with bolts, shortening assembly time compared to traditional welding processes. The mold uses quick-release insert technology, supporting small-batch, multi-specification mixed-line production, quickly responding to market demands. The dual-connection design, with the cover boss and mounting holes ensuring a continuous sealing surface when closed, effectively prevents electrolyte leakage and dust intrusion. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the present invention.

[0020] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0021] Figure 3 This is a schematic diagram of the splicing cover of this utility model.

[0022] Figure 4 This is a schematic diagram of the measuring cover of this utility model.

[0023] Among them, 1-side cover, 2-splicing cover, 3-connecting part, 31-groove, 32-protrusion, 33-insert, 34-connecting hole, 4-protrusion, 41-mounting hole, 5-insulation layer. Detailed Implementation

[0024] 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 skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0025] like Figures 1 to 4 As shown, this utility model is a combined battery cover, the main structure of which includes left and right symmetrical side covers 1 and expandable splicing covers 2.

[0026] The side cover 1 has a quarter-capsule shape, with quarter-spherical curved surfaces at the front and rear ends and a long rectangular plane in the middle. It is integrally molded using fiberglass molding technology, with a wall thickness of 5 mm and circumferential bosses 4 on the surface. The inner side of the side cover 1 has a connecting part 3, with a groove 31 on the left side, in which three metal inserts 33 are embedded; and a groove 32 on the right side, with three connecting holes 34, for mating with the grooves of the splicing cover 2 or another set of side covers 1.

[0027] The splicing cover 2 has rounded transition structures on both sides and a long rectangular plane in the middle, with its front and rear lengths being exactly the same as the side cover 1. The material and manufacturing process are the same as the side cover 1. The left side is designed with a raised groove 32, and the right side with a recessed groove 31, forming a complementary structure with the connecting part 3 of the adjacent side cover 1. The number of splicing covers 2 can be increased or decreased according to the battery width requirements, achieving flexible adaptation of battery cover widths from 300 mm to 1200 mm.

[0028] The groove 31 and protrusion 32 of the connecting part 3 are 8 mm deep to ensure that the gap between the joints is less than 0.1 mm after snapping. The insert 33 is a pre-embedded M6 metal stud, and the connecting hole 34 is a φ8 mm through hole, which is fastened with an M6×15 mm bolt.

[0029] The boss 4 extends circumferentially along the edge of the cover, with a height of 3 mm. It has evenly distributed φ10 mm mounting holes 41 for bolt connection of the upper and lower covers.

[0030] The insulation layer 5 is composed of an inner 2 mm aerogel felt and an outer 8 mm polyurethane foam, and is bonded to the inner wall of the cover with epoxy resin adhesive.

[0031] How to use:

[0032] Select two side covers 1 and multiple splicing covers 2 according to the width of the lithium battery. Sequentially connect the side covers 1 and splicing covers 2 using the grooves 31 and protrusions 32. After ensuring that the inserts 33 are aligned with the connecting holes 34, secure them with bolts. Place the assembled lower cover under the battery pack, covering the upper cover. Align the protrusions 4 with the mounting holes 41 and tighten them with M8×20 mm bolts.

[0033] The above provides a detailed description of the combined battery cover provided by this utility model. Specific examples have been used to illustrate the principles and implementation methods of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A combined battery cover, comprising left and right symmetrical side covers (1), at least one joint cover (2) is arranged between the side covers (1), characterized in that, The side cover (1) is a quarter "capsule" shape, the front and back are quarter spherical, the middle is a long rectangular, the splicing cover (2) is arc-shaped on both sides and long rectangular in the middle, the front and back lengths of the side cover (1) are consistent with the front and back lengths of the splicing cover (2), the side cover (1) and the splicing cover (2) are provided with a connecting part (3) therebetween, the connecting part (3) includes at least two grooves (31) and at least two corresponding convex grooves (32), the connecting part (3) of the left side cover (1) is provided as the groove (31), the left side of the splicing cover (2) is provided with the convex groove (32), the connecting part (3) of the right side cover (1) is provided as the convex groove (32), and the right side of the splicing cover (2) is provided with the groove (31).

2. A combination battery cover according to claim 1, wherein, The groove (31) is uniformly provided with at least three inserts (33), and the inside of the convex groove (32) is uniformly provided with at least three connecting holes (34) corresponding to the inserts (33).

3. A combination battery cover according to claim 2, wherein, The side cover (1) and the splicing cover (2) are provided with a convex table (4) on the periphery, and at least one mounting hole (41) is formed in the convex table (4) of the side cover (1) and the splicing cover (2).

4. A combined battery cover according to any one of claims 1 to 3, characterized in that The side cover (1) and the splicing cover (2) are made of glass steel.

5. A combination battery cover according to claim 4, wherein, The battery cover is provided with a heat preservation layer (5) inside.

6. A combination battery cover according to claim 5, wherein, The heat preservation layer (5) is a composite heat preservation layer of aerogel and polyurethane, the inside of the heat preservation layer (5) is provided with aerogel felt with a thickness of 1-3mm, and the outside of the heat preservation layer (5) is provided with polyurethane foam with a thickness of 5-10mm.

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