Lightweight vehicle body
By employing a multi-layered protective structure of carbon fiber composite materials and high-strength steel in the body of new energy vehicles, the problem of aluminum metal shells being easily punctured has been solved, achieving effective protection of the battery pack and lightweight body design.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BAODING LANBAO SPECIAL VEHICLE MFG CO LTD
- Filing Date
- 2025-05-30
- Publication Date
- 2026-04-28
AI Technical Summary
The aluminum metal shell of existing new energy vehicle chassis has poor strength and is easily punctured when it collides with external objects, which can lead to battery pack fires. Therefore, it is necessary to improve the protection effect of the battery pack.
The body, constructed from carbon fiber composite materials, combines corrugated panels, an internal frame, and high-strength steel components, which are connected by welding and bolting to form a multi-layered protective structure. This structure includes carbon fiber corrugated panels, an aluminum alloy internal frame, and an aramid fiber top plate, enhancing the protection of the battery pack.
It effectively prevents external factors from puncturing the battery pack, enhances protection capabilities, and at the same time reduces vehicle weight and increases rigidity, achieving the goal of lightweighting.
Smart Images
Figure CN224171041U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive technology, specifically to a lightweight car body. Background Technology
[0002] With the development of technology, automobiles include two categories: gasoline vehicles and new energy vehicles. Regardless of whether they are gasoline vehicles or new energy vehicles, their main body structure is gradually developing towards lightweighting to meet the demands, ensuring the overall rigidity and strength of the vehicle while reducing its weight.
[0003] The vehicle body consists of an outer frame and a chassis. In new energy vehicles, the battery pack is installed in the chassis. With the demand for lightweighting, some chassis use aluminum metal shells. However, due to the poor strength of aluminum metal shells and the different driving environments on the road surface, the chassis is easily punctured when it is hit by external objects, which can cause the batteries in the battery pack to catch fire. Therefore, improvements are needed.
[0004] Therefore, it is necessary to propose a lightweight body design. Utility Model Content
[0005] To address the shortcomings of existing technologies, this invention provides a lightweight vehicle body that effectively protects the battery pack, prevents punctures, and improves its protective effect, thus solving the problems mentioned in the background art.
[0006] This utility model provides the following technical solution: a lightweight car body, comprising:
[0007] The bottom of the vehicle body is fitted with an outer shell by welding, and the interior of the outer shell has a mounting groove.
[0008] A corrugated plate is bonded to the bottom of the mounting groove, and an inner frame is welded to the side wall of the mounting groove. The lower surface of the inner frame is bonded to the upper surface of the corrugated plate. A slot is opened at the bottom of the vehicle body, and a cover plate is snapped into the slot. A top plate is bonded to the lower surface of the cover plate.
[0009] Preferably, the body is constructed of carbon fiber reinforced polymer (CFRP), and key components such as the central tunnel, floor, A / B pillars, and door anti-collision bars are constructed of high-strength steel.
[0010] Preferably, a battery pack is installed inside the built-in frame, and the lower surface of the top plate is in contact with the upper surface of the battery pack and the built-in frame.
[0011] Preferably, the corrugated plate is constructed of carbon fiber, the inner frame is constructed of aluminum alloy, and the top plate is constructed of aramid fiber.
[0012] Preferably, both ends of the cover plate are threaded with bolts, and the ends of the bolts extend into the interior bottom of the vehicle body for threaded connection.
[0013] Preferably, the internal size of the built-in frame is the same as the external size of the battery pack.
[0014] Compared with the prior art, the present invention has the following beneficial effects:
[0015] This lightweight body design utilizes a multi-faceted protection system for the battery pack, employing corrugated panels made of carbon fiber and an internal frame made of aluminum alloy. This effectively prevents external factors from puncturing the battery pack's interior, enhancing its protective capabilities. The corrugated panels also serve as a buffer, and the top of the battery pack is further reinforced with a top plate made of aramid fiber. The overall body structure is constructed using carbon fiber reinforced polymer (CFRP) composite materials, while key components such as the center tunnel, floor, A / B pillars, and door anti-collision bars can be constructed using high-strength steel. This effectively reduces the overall weight of the vehicle body while simultaneously enhancing its rigidity. Attached Figure Description
[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the overall structure of the device of this utility model;
[0018] Figure 2 This is a schematic diagram of the outer shell structure of this utility model;
[0019] Figure 3 This utility model Figure 2 Cross-sectional structural diagram.
[0020] The attached diagram lists the components represented by each number as follows:
[0021] 1. Body; 110. Groove;
[0022] 2. Outer shell; 210. Mounting slot; 220. Corrugated plate; 230. Internal frame;
[0023] 3. Cover plate; 310. Top plate; 320. Bolts;
[0024] 4. Battery pack. Detailed Implementation
[0025] 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.
[0026] With the development of convenient transportation, cars have gradually entered families. A car is mainly composed of a power system, suspension system, braking system, body, steering system, and electrical system. The body is the outer shell of the car, which mainly serves to protect passengers and carry goods. It also affects the car's appearance and aerodynamic performance. The body structure is divided into two types: monocoque and non-monocoque. Monocoque body does not have an independent frame, and the body directly bears various forces; non-monocoque body has an independent frame, and the body is mounted on the frame through elastic elements.
[0027] Automobiles include two categories: gasoline vehicles and new energy vehicles. Regardless of whether they are gasoline vehicles or new energy vehicles, their main body structure is gradually developing towards lightweight design in response to demand, which ensures the overall rigidity and strength of the vehicle while reducing its weight.
[0028] Current car bodies primarily use ordinary steel, with some high-end models potentially employing high-strength steel. Steel offers advantages such as high strength, good toughness, low cost, and mature processing technology, but its high density results in a relatively heavy body. Lightweight car bodies, on the other hand, utilize more advanced structural design concepts, such as topology optimization and finite element analysis, to refine the body structure. By rationally distributing materials and optimizing the shape and size of components, the amount of material used is minimized while ensuring body strength and safety, thus achieving the goal of lightweighting.
[0029] Please see Figure 1 , Figure 2 and Figure 3 A lightweight body, comprising body 1:
[0030] The bottom of the vehicle body 1 is fitted with an outer shell 2 by welding, and the interior of the outer shell 2 is provided with a mounting groove 210;
[0031] A corrugated plate 220 is bonded to the bottom of the mounting slot 210. An internal frame 230 is welded to the side wall of the mounting slot 210. The lower surface of the internal frame 230 is bonded to the upper surface of the corrugated plate 220. A slot 110 is opened at the bottom of the interior of the vehicle body 1. A cover plate 3 is snapped into the inside of the slot 110. A top plate 310 is bonded to the lower surface of the cover plate 3. A battery pack 4 is installed inside the internal frame 230. The lower surface of the top plate 310 is in contact with the battery pack 4 and the upper surface of the internal frame 230.
[0032] The corrugated plate 220 and the built-in frame 230 provide multi-faceted protection for the battery pack 4, effectively preventing external factors from puncturing the interior of the battery pack 4 and enhancing the protection capability of the battery pack 4. At the same time, the corrugated plate 220 also serves as a buffer, and the top plate 310 set on the top of the battery pack 4 further enhances the protection performance.
[0033] The corrugated plate 220 is constructed of carbon fiber, the inner frame 230 is constructed of aluminum alloy, and the top plate 310 is constructed of aramid fiber.
[0034] As a preferred technical solution of this utility model, the body 1 is constructed of carbon fiber reinforced plastic (CFRP), and key parts such as the central tunnel, floor, A / B pillars and door anti-collision bars of the body 1 are constructed of high-strength steel. This not only effectively reduces the overall weight of the body 1 and achieves a lightweight effect, but also enhances the overall rigidity of the body 1.
[0035] As a preferred technical solution of this utility model, both ends of the cover plate 3 are threaded with bolts 320, and the ends of the bolts 320 extend into the bottom of the vehicle body 1 for threaded connection.
[0036] The cover plate 3 and the body 1 are connected by bolts 320, which allows for easy disassembly and assembly of the cover plate 3.
[0037] As a preferred technical solution of this utility model, the internal size of the built-in frame 230 is the same as the external size of the battery pack 4.
[0038] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A lightweight vehicle body, comprising a vehicle body (1), characterized in that: The bottom of the vehicle body (1) is fitted with an outer shell (2) by welding, and the interior of the outer shell (2) is provided with a mounting groove (210). A corrugated plate (220) is bonded to the bottom of the mounting groove (210). An inner frame (230) is welded to the side wall of the mounting groove (210). The lower surface of the inner frame (230) is bonded to the upper surface of the corrugated plate (220). A slot (110) is opened at the bottom of the vehicle body (1). A cover plate (3) is snapped into the inside of the slot (110). A top plate (310) is bonded to the lower surface of the cover plate (3).
2. The lightweight vehicle body according to claim 1, characterized in that: The body (1) is constructed of carbon fiber composite material CFRP, and the key parts of the body (1), such as the central tunnel, floor, A / B pillars and door anti-collision bars, are constructed of high-strength steel.
3. The lightweight vehicle body according to claim 1, characterized in that: The battery pack (4) is installed inside the built-in frame (230), and the lower surface of the top plate (310) is in contact with the upper surface of the battery pack (4) and the built-in frame (230).
4. A lightweight vehicle body according to claim 1, characterized in that: The corrugated plate (220) is constructed of carbon fiber, the inner frame (230) is constructed of aluminum alloy, and the top plate (310) is constructed of aramid fiber.
5. A lightweight vehicle body according to claim 1, characterized in that: Both ends of the cover plate (3) are threaded with bolts (320), and the ends of the bolts (320) extend into the bottom of the vehicle body (1) for threaded connection.
6. A lightweight vehicle body according to claim 3, characterized in that: The internal size of the built-in frame (230) is the same as the external size of the battery pack (4).