Battery pack cover plate, battery pack shell and battery pack

Abstract

The utility model provides a battery pack cover plate, a battery pack shell and a battery pack, the battery pack cover plate comprises a cover plate main body, and the cover plate main body sequentially comprises a first resin layer, at least one mixed fiber cloth layer and a second resin layer from outside to inside; the mixed fiber cloth layer is made of gridding cloth, and the gridding cloth is formed by weaving basalt fibers and glass fibers serving as warps and wefts respectively. According to the battery pack cover plate disclosed by the utility model, the fire resistance of a traditional battery pack cover plate can be effectively improved, the overall structural strength of the cover plate is not influenced, meanwhile, materials and labor cost for independently sticking basalt fibers or mica plates can be saved, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to power battery pack technical field, especially the battery pack cover plate of a kind of, the utility model relates to a kind of battery pack shell with above-mentioned battery pack cover plate is also involved. Meanwhile, the utility model also still relates to a kind of battery pack with the battery pack shell. BACKGROUND

[0002] With the rapid development of current new energy automobile industry in global scope, the demand of automobile power battery is higher and higher, and the requirement is higher and higher.Power battery pack as one of the core components of electric vehicle, by battery module, upper cover body, lower shell, water-cooled plate and other parts.

[0003] In prior art, the upper cover body compounded by HP-RTM (high pressure resin transfer molding) process, when facing fire of ternary lithium battery, the heat protection ability is insufficient, need to paste basalt fiber or mica plate in the inside to prevent thermal runaway. Thus need to additionally increase material cost and labor cost, and also lead to low production efficiency. UTILITY MODEL CONTENT

[0004] Therefore, the utility model aims at providing a kind of battery pack cover plate to improve the fireproof performance and production efficiency of cover plate while ensuring structural strength.

[0005] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0006] A kind of battery pack cover plate, including cover plate main body, the cover plate main body sequentially includes first resin layer, at least one mixed fiber cloth layer and second resin layer from outside to inside;

[0007] The mixed fiber cloth layer uses mesh cloth, and the mesh cloth is woven by basalt fiber and glass fiber as warp and weft respectively.

[0008] Further, the thickness of the mesh cloth is between 0.25mm-0.35mm.

[0009] Further, the mesh cloth has between 300 meshes-500 meshes.

[0010] Further, the first resin layer and the second resin layer are cured by the same resin;The resin uses epoxy resin or polyurethane resin.

[0011] Further, the thickness of the cover plate main body is 1.2mm-2.4mm.

[0012] Further, the cover plate main body has main body part, and connecting flanging is arranged on the circumference of the main body part;The connecting flanging is provided with connecting part for connecting the cover plate main body with battery pack lower box.

[0013] Further, the main body part is provided with a reinforcing rib structure protruding towards the outside of the cover plate main body.

[0014] Further, the reinforcing rib structure comprises a first reinforcing rib extending along the length direction of the main body part, and a second reinforcing rib extending along the width direction of the main body part, and the second reinforcing rib intersects with the first reinforcing rib.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] The battery pack cover plate is made of resin and glass cloth made of basalt fiber and glass fiber, which can ensure the structural strength of the battery pack cover plate, improve the fireproof performance of the battery pack cover plate by using the fireproof performance of basalt fiber, and also can save the cost of separately pasting basalt fiber or mica plate and labor cost, and improve the production efficiency.

[0017] In addition, the thickness of the glass cloth is limited, so that the number of layers of the glass cloth can be calculated according to the overall thickness required by the battery pack cover plate. The limitation of the mesh number of the glass cloth is beneficial to the filling of the liquid resin in the gap of the glass cloth during preparation, and is beneficial to improving the preparation quality of the battery pack cover plate. The first resin layer and the second resin layer are made of the same resin and are solidified and formed, which is beneficial to the preparation of the battery pack cover plate. The resin is epoxy resin or polyurethane resin, which has good flame retardant performance and can ensure the structural strength of the battery pack cover plate after solidification. The limitation of the thickness of the cover plate main body can take into account the structural strength and material consumption of the battery pack cover plate, and can also meet the preparation of battery pack cover plates with different thicknesses.

[0018] In addition, the connecting flange is arranged on the periphery of the cover plate main body, and the connecting part is arranged on the connecting flange, which is beneficial to the connection of the battery pack cover plate and the lower box body of the battery pack. The reinforcing rib structure arranged on the main body part can improve the structural strength of the main body part and the battery pack cover plate, and can effectively prevent the surface of the main body part from being depressed and deformed. The reinforcing rib structure adopts the intersecting first reinforcing rib and second reinforcing rib, which has simple structure and is easy to process and prepare, and can further prevent the surface of the main body part from being depressed and deformed, and improve the overall structural strength of the battery pack cover plate.

[0019] Another purpose of the utility model is to provide a battery pack shell, which comprises a lower box body and a battery pack cover plate as described above, and the battery pack cover plate is connected with the lower box body.

[0020] Still another purpose of the utility model is to provide a battery pack, which comprises the battery pack shell as described above.

[0021] The battery pack cover plate and the battery pack have the same beneficial effects as the battery pack cover plate described above, and the same beneficial effects as the prior art, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0022] The drawings constituting a part of the present application serve to provide a further understanding of the present application, and the illustrative embodiments of the present application and the description thereof serve to explain the present application and do not constitute an undue limitation on the present application. In the drawings:

[0023] Figure 1 The structure schematic view of the battery pack cover plate described in the embodiment of the present application is shown in the figure.

[0024] Figure 2 The structure schematic view of the battery pack cover plate described in the embodiment of the present application is shown in the figure. Figure 1 The A-A direction view of the middle part is shown in the figure.

[0025] Figure 3 The B part enlarged view of the middle part is shown in the figure. Figure 2 The A-A direction view of the middle part is shown in the figure.

[0026] Figure 4 The structure schematic view of the mesh cloth described in the embodiment of the present application is shown in the figure.

[0027] EXPLANATION OF REFERENCE NUMERALS:

[0028] 1, cover plate body; 101, first resin layer; 102, mixed fiber cloth layer; 103, second resin layer;

[0029] 11, main body part; 12, connecting flange; 111, first reinforcing rib; 112, second reinforcing rib; 121, connecting part. DETAILED DESCRIPTION

[0030] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0031] In the description of the present application, it should be noted that if the terms indicating the orientation or position relationship such as "upper", "lower", "inner", "outer" and the like appear, they are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, if the terms "first", "second" and the like appear, they are also used for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0032] In addition, in the description of the utility model, unless otherwise expressly limited, the terms "mounting", "connection", "connection" and "connector" should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or integrally connected. It can be mechanically connected, or it can be electrically connected. It can be directly connected, or it can be indirectly connected through an intermediate medium. It can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood in combination with the specific circumstances.

[0033] The utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0034] Embodiment one

[0035] The embodiment relates to a battery pack cover plate which can effectively improve the fireproof performance and production efficiency of the battery pack cover plate while ensuring structural strength.

[0036] In the overall structure, referring to Figures 1 to 3 The battery pack cover plate of the embodiment comprises a cover plate body 1, which comprises a first resin layer 101, at least one mixed fiber cloth layer 102 and a second resin layer 103 from outside to inside. The mixed fiber cloth layer 102 adopts a mesh cloth which is woven by basalt fibers and glass fibers as warp and weft respectively.

[0037] At this time, in the structure above, the battery pack cover plate is made into one body by adopting resin and the mesh cloth woven by basalt fibers and glass fibers and by the HP-RTM (high pressure resin transfer molding) process, so that the structural strength of the battery pack cover plate can be ensured, the fireproof performance of the battery pack cover plate can be improved by using the fireproof performance of basalt fibers, the material and labor cost of separately pasting basalt fibers or mica plates can be saved, and the production efficiency is improved.

[0038] Based on the overall introduction above, in detail, in the embodiment, one mixed fiber cloth layer 102 can be arranged, or two, three or any multiple layers can be arranged, which is arranged according to the actual demand of the battery pack cover plate.

[0039] As a preferred embodiment, in the embodiment, the thickness of the mesh cloth is between 0.25mm and 0.35mm. In this way, the number of layers of the mesh cloth can be calculated based on the overall thickness required by the battery pack cover plate. In specific implementation, the thickness of the mesh cloth can be set to 0.25mm, 0.28mm, 0.30mm, 0.32mm or 0.35mm, etc.

[0040] In the embodiment, the mesh cloth has a mesh number of 300-500. The mesh number of the mesh cloth is limited, so that the liquid resin can be filled in the gaps of the mesh cloth during preparation, thereby improving the preparation quality of the battery pack cover plate. In specific implementation, the mesh number of the mesh cloth can be 300, 350, 400, 450, or 500.

[0041] It should be noted that the basalt fibers and the glass fibers can be interwoven in the manner shown in the following table in specific implementation. Figure 4 The colored part is the basalt fiber, and the blank part is the glass fiber. The basalt fiber and the glass fiber are interwoven to form the mesh cloth.

[0042] In the embodiment, the first resin layer 101 and the second resin layer 103 are cured by using the same resin. The resin is preferably epoxy resin or polyurethane resin, which has good flame retardant performance and can ensure the structural strength of the battery pack cover plate after curing.

[0043] In addition, preferably, the thickness of the cover plate body 1 is 1.2-2.4 mm. By limiting the thickness of the cover plate body 1, the structural strength and the material consumption of the battery pack cover plate can be considered, and the battery pack cover plates with different thicknesses can also be prepared. In specific implementation, the thickness of the cover plate body 1 can be 1.2 mm, 1.5 mm, 1.8 mm, 2.0 mm, 2.2 mm, or 2.2 mm. For the cover plate body 1 with different thicknesses, the number of layers of the mesh cloth can be increased or decreased. The thicker the cover plate body 1, the more layers of the mesh cloth, and the higher the fireproof performance.

[0044] Referring to Figures 1 to 3 In the embodiment, the cover plate body 1 has a main body part 11 and a connecting flange 12 arranged circumferentially on the main body part 11. The connecting flange 12 is connected to the main body part 11 through a connecting edge extending from the edge of the main body part 11 to one side of the main body part 11, and the connecting flange 12 is provided with a connecting part 121 for connecting the cover plate body 1 to the lower box body of the battery pack. At this time, the connecting flange 12 and the connecting part 121 are arranged, which is conducive to the connection of the cover plate body 1 and the lower box body of the battery pack.

[0045] Specifically, the connecting part 121 includes a connecting hole, and the connecting hole is a plurality of holes arranged circumferentially on the main body part 11. In specific implementation, the cover plate body 1 is connected to the lower box body of the battery pack by connecting bolts arranged in the connecting holes.

[0046] In addition, as Figure 1As shown, in the embodiment, a reinforcing rib structure is also arranged on the main body 11 and protrudes outwardly from the cover plate main body 1. The reinforcing rib structure can improve the structural strength of the main body 11, i.e. the battery pack cover plate, and effectively prevent the surface of the main body 11 from being deformed.

[0047] As a preferred embodiment, the reinforcing rib structure comprises a first reinforcing rib 111 extending along the length direction of the main body 11, and a second reinforcing rib 112 extending along the width direction of the main body 11, and the second reinforcing rib 112 intersects the first reinforcing rib 111. The first reinforcing rib 111 is arranged at the middle of the width direction of the main body 11, and the second reinforcing rib 112 is arranged in multiple along the length direction of the main body 11, and each second reinforcing rib 112 intersects the first reinforcing rib 111. This structure is simple and easy to process and manufacture, and can further prevent the surface of the main body 11 from being deformed and improve the overall structural strength of the battery pack cover plate.

[0048] The battery pack cover plate of the embodiment can be prepared by a conventional HP-RTM (high pressure resin transfer molding). In the specific preparation, first, the mesh cloth woven by basalt fiber and glass fiber is cut into a predetermined size, and then the cut mesh cloth is layered, i.e. multiple mesh cloth layers are arranged together, and then the multiple layered mesh cloth is molded into a preform. The preformed hybrid fiber cloth layer 102 is transferred to the HP-RTM station, and then vacuumizing, resin injection and curing are performed, and finally the prepared battery pack cover plate is taken out.

[0049] The battery pack cover plate of the embodiment is prepared by the mesh cloth woven by basalt fiber and glass fiber and resin, which can effectively improve the fire resistance of the conventional battery pack cover plate without affecting the overall structural strength of the cover plate, and can also save the cost of separately pasting basalt fiber or mica plate and labor cost, and improve the production efficiency.

[0050] Embodiment Two

[0051] The embodiment relates to a battery pack shell, which comprises a lower box body and the battery pack cover plate of embodiment one, and the battery pack cover plate is connected with the lower box body. In the specific implementation, the battery pack cover plate is connected with the lower box body through the connecting piece arranged in the connecting hole of the connecting flange 12.

[0052] In addition, the embodiment also relates to a battery pack comprising the above-mentioned battery pack shell.

[0053] The battery pack and the battery pack shell of the embodiment can ensure the structural strength of the battery pack cover plate as a whole, effectively improve the fire resistance of the traditional battery pack, and also can save the material and labor cost of separately pasting basalt fiber or mica plate, improve the production efficiency, and further improve the use reliability of the battery pack.

[0054] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1.A battery pack cover plate, characterized in that: a cover plate body is included, the cover plate body includes a first resin layer, at least one mixed fiber cloth layer and a second resin layer from outside to inside in sequence; the mixed fiber cloth layer adopts a mesh cloth, the mesh cloth is woven by basalt fibers and glass fibers as warp and weft respectively. 2.The battery pack cover plate according to claim 1, characterized in that: the thickness of the mesh cloth is between 0.25mm-0.35mm. 3.The battery pack cover plate according to claim 1, characterized in that: the mesh cloth has a mesh count between 300 mesh-500 mesh. 4.The battery pack cover plate according to claim 1, characterized in that: the first resin layer and the second resin layer are cured by the same resin; the resin adopts epoxy resin or polyurethane resin. 5.The battery pack cover plate according to claim 1, characterized in that: the thickness of the cover plate body is between 1.2mm-2.4mm. 6.The battery pack cover plate according to any one of claims 1 to 5, characterized in that: the cover plate body has a body part, and a connecting flange arranged circumferentially on the body part; a connecting part for connecting the cover plate body and a lower box of a battery pack is arranged on the connecting flange. 7.The battery pack cover plate according to claim 6, characterized in that: a reinforcing rib structure is arranged on the body part and protrudes outwardly from the cover plate body. 8.The battery pack cover plate according to claim 7, characterized in that: the reinforcing rib structure includes a first reinforcing rib extending along the length direction of the body part, and a second reinforcing rib extending along the width direction of the body part, the second reinforcing rib intersects with the first reinforcing rib. 9.A battery pack shell, characterized in that: the battery pack shell includes a lower box, and the battery pack cover plate according to any one of claims 1 to 8 is connected with the lower box. 10.A battery pack, characterized in that: the battery pack includes the battery pack shell according to claim 9.

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