Lightweight vehicle body of electric vehicle

Abstract

The utility model relates to the technical field of electric automobiles, and discloses an electric automobile light-weight automobile body which comprises an automobile frame bottom, a partition plate A, a partition plate B and a battery pack are installed in a battery compartment, protection components are installed at the four corners in the battery compartment in an embedded mode, and a bottom hole is formed in the bottom end of the battery compartment in a penetrating mode. Rubber semi-circular bodies are installed at the bottom end of the interior of the battery compartment and located on the two sides of the bottom hole, the battery pack is placed in the battery compartment, the rubber semi-circular bodies support the two sides of the bottom end of the battery pack, and in the running process of the electric automobile, air is filtered through a filter screen and guided into the bottom hole through an inclined guide strip; the moisture absorption particles absorb moisture in the wind, the wind is directly blown to the bottom end of the battery pack through the bottom hole, and the wind flows through a gap between the bottom end of the battery pack and the bottom end in the battery cabin to cool the surface of the battery pack, so that the battery pack is prevented from thermal expansion, and the safety of the electric vehicle is not influenced.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle technology, specifically to a lightweight electric vehicle body. Background Technology

[0002] Electric vehicles (EVs) are battery-powered cars powered by electric motors. Unlike traditional gasoline-powered cars, EVs do not rely on an internal combustion engine; instead, they use rechargeable batteries to store energy and drive the vehicle. The powertrain of EVs is relatively simple, reducing the number of mechanical components found in traditional cars (such as engines and transmissions), thus resulting in lower maintenance and repair costs. The design of EV bodies also requires special consideration for the battery pack layout, which is typically located in a dedicated battery compartment at the bottom of the vehicle.

[0003] For example, a lightweight electric vehicle body with publication number CN217477401U includes a base, a bracket, a battery module box, a rear pillar, a connecting pillar, a front frame, an arc-shaped support frame, and a roof plate. A support pillar is located in the middle of the arc-shaped support frame, with the support pillars situated on both sides of the bottom of the roof plate. The bottom of the support pillar is fixedly connected to the base. An extension pillar is located on the side of the front frame away from the base, with a crash beam at one end. A connecting rod is located in the middle of the arc-shaped support frame, situated at the bottom of the battery module box, with both ends of the connecting rod fixedly connected to the base. The use of aluminum alloy materials for the base, bracket, rear pillar, arc-shaped bracket, roof plate, support pillar, front frame, and crash beam significantly reduces the overall vehicle weight and energy consumption. The cooperation between the base, rear pillar, arc-shaped bracket, support pillar, and front frame improves the overall structural strength of the vehicle body and increases safety.

[0004] The aforementioned patent proposes that the connecting rod is located at the bottom of the battery module box, and both ends of the connecting rod are fixedly connected to the base. The stability between the battery module boxes is improved through the cooperation between the connecting rod and the bracket. However, in actual use, the bracket, crossbeam and reinforcing column restrict the position of the battery pack. The battery pack will generate heat during charging and discharging. In long-term use, the battery volume will expand. Limiting the thermal expansion of the battery pack will affect the structural safety and service life of the battery pack. Utility Model Content

[0005] The purpose of this invention is to provide a lightweight body for electric vehicles to solve the problem of limiting the thermal expansion of the battery pack mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a lightweight electric vehicle body, including a frame bottom, a battery compartment installed at the top of the frame bottom, a partition A and a partition B installed inside the battery compartment, and the partition A and the partition B are installed in a crisscross manner, a battery pack is installed inside the battery compartment, and a compartment cover is provided inside the battery compartment and at the top of the battery pack.

[0007] Protective components are embedded in the four corners of the battery compartment. A bottom hole is opened through the bottom of the battery compartment. Rubber semicircles are installed on both sides of the bottom of the battery compartment and the bottom hole.

[0008] Preferably, a dense mesh B is installed at the bottom of the bottom hole, and moisture-absorbing particles are provided at the top of the dense mesh B and inside the bottom hole, while a dense mesh A is provided inside the bottom hole and at the top of the moisture-absorbing particles.

[0009] Preferably, an inclined guide bar is installed at the bottom end of the battery compartment and on one side of the bottom hole, with the bottom end of the inclined guide bar located below the bottom hole, and the inner wall of the battery compartment has a row of holes.

[0010] Preferably, an internal frame is installed inside the bottom of the vehicle frame and at the lower end of the battery compartment, and a filter screen is installed at the top of the internal frame.

[0011] Preferably, an inclined rod and a horizontal rod are installed inside the built-in frame and at the bottom of the filter screen, with the horizontal rod positioned at the intersection of the inclined rods.

[0012] Preferably, the protective component includes an L-shaped inner plate, the inner wall of which is fitted with a thermoplastic polyurethane elastomer, and multiple sets of the thermoplastic polyurethane elastomer are provided.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model discloses a lightweight electric vehicle body, in which the battery pack is placed inside the battery compartment. A rubber semi-circular body supports the bottom sides of the battery pack. During the operation of the electric vehicle, the air is filtered through a filter screen and guided into the interior of the bottom hole by inclined guide strips. Moisture-absorbing particles absorb the moisture in the air. The air blows directly to the bottom of the battery pack through the bottom hole and flows through the gap between the bottom of the battery pack and the bottom of the battery compartment, which dissipates heat from the surface of the battery pack and prevents thermal expansion of the battery pack, thus affecting the safety of the electric vehicle.

[0015] 2. The lightweight electric vehicle body disclosed in this utility model, during the charging and discharging process, causes the thermoplastic polyurethane elastomer to deform under the pressure of the battery pack when it thermally expands. Heat circulates inside the battery compartment and is discharged through the drain holes. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0017] Figure 2 This is a three-dimensional structural diagram of the chassis bottom of this utility model;

[0018] Figure 3 This is a three-dimensional structural diagram of the battery compartment of this utility model;

[0019] Figure 4 This is a three-dimensional structural diagram of the bottom of the battery compartment of this utility model.

[0020] In the diagram: 1. Frame bottom; 11. Internal frame; 12. Horizontal bar; 13. Diagonal bar; 14. Filter screen; 15. Battery compartment; 151. Separator A; 152. Separator B; 153. Drain hole; 154. Bottom hole; 155. Moisture-absorbing particles; 156. Rubber semi-circular body; 157. Dense mesh A; 158. Dense mesh B; 16. Compartment cover; 17. Protective component; 171. L-shaped internal plate; 172. Thermoplastic polyurethane elastomer; 18. Diagonal lead bar; 2. Battery pack. Detailed Implementation

[0021] 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.

[0022] Example 1: Please refer to Figures 1-4 A lightweight electric vehicle body includes a frame base 1, a battery compartment 15 is installed at the top of the frame base 1, a partition A151 and a partition B152 are installed inside the battery compartment 15, and the partition A151 and the partition B152 are installed in a cross manner, a battery pack 2 is installed inside the battery compartment 15, and a cover 16 is provided inside the battery compartment 15 and at the top of the battery pack 2.

[0023] Protective components 17 are embedded in the four corners of the battery compartment 15. A bottom hole 154 is opened through the bottom of the battery compartment 15. Rubber semicircles 156 are installed on both sides of the bottom of the battery compartment 15 and the bottom hole 154. The rubber semicircles 156 lift up the battery pack 2 to ensure that there is a gap between the battery pack 2 and the battery compartment 15, so as to facilitate the cooling of the battery pack 2 by air. The rubber semicircles 156 can also protect the bottom of the battery pack 2.

[0024] A dense mesh B158 is installed at the bottom of the bottom hole 154. Moisture-absorbing particles 155 are provided at the top of the dense mesh B158 and inside the bottom hole 154. A dense mesh A157 is provided inside the bottom hole 154 and at the top of the moisture-absorbing particles 155. The moisture-absorbing particles 155 absorb moisture in the wind. The dense mesh B158 and dense mesh A157 constrain the moisture-absorbing particles 155 to prevent them from directly entering the battery compartment 15 and affecting the battery pack 2.

[0025] An inclined guide bar 18 is installed at the bottom of the battery compartment 15 and on one side of the bottom hole 154. The bottom end of the inclined guide bar 18 is below the bottom hole 154, and the top end of the inclined guide bar 18 is at the rear end of the bottom hole 154, so that the wind can flow along the inclined guide bar 18 when the electric vehicle is driving.

[0026] An internal frame 11 is installed inside the frame bottom 1 and at the lower end of the battery compartment 15. A filter 14 is installed at the top of the internal frame 11. The filter 14 is used to filter impurities in the air to prevent impurities from entering the battery compartment 15 and adhering to the surface of the battery pack 2, which would affect the normal heat dissipation of the battery pack 2.

[0027] Inside the built-in frame 11, at the bottom of the filter screen 14, there are inclined rods 13 and horizontal rods 12. The horizontal rods 12 are located at the intersection of the inclined rods 13. The inclined rods 13 and horizontal rods 12 support the filter screen 14 and prevent the filter screen 14 in the middle from falling off after long-term use, thus affecting the use effect of the filter screen 14.

[0028] In this embodiment: the partitions A151 and B152 divide the internal space of the battery compartment 15, and the battery pack 2 is placed inside the battery compartment 15. The rubber semicircular body 156 supports the bottom sides of the battery pack 2 to prevent the battery pack 2 from directly contacting the bottom of the battery compartment 15. The cover 16 is installed on the top of the battery compartment 15, which restrains the upper part of the multiple battery packs 2. During the operation of the electric vehicle, the air is filtered by the filter screen 14 and guided into the bottom hole 154 by the inclined guide bar 18. The moisture-absorbing particles 155 set between the dense mesh A157 and the dense mesh B158 absorb the moisture in the air. The air blows directly to the bottom of the battery pack 2 through the bottom hole 154 and flows through the gap between the bottom of the battery pack 2 and the bottom of the battery compartment 15, which dissipates heat from the surface of the battery pack 2 and prevents the battery pack 2 from thermally expanding, which would affect the safety of the electric vehicle.

[0029] Example 2: This example is an improvement upon Example 1. For details, please refer to [link / reference]. Figure 3The protective component 17 includes an L-shaped inner plate 171. The inner wall of the L-shaped inner plate 171 is fitted with a thermoplastic polyurethane elastomer 172, and multiple sets of thermoplastic polyurethane elastomer 172 are provided. The inner wall of the battery compartment 15 and above the L-shaped inner plate 171 are provided with drainage holes 153. The multiple sets of thermoplastic polyurethane elastomer 172 are divided into upper and lower layers, and the two layers of thermoplastic polyurethane elastomer 172 are arranged in a cross manner to facilitate heat dissipation when the battery pack 2 expands thermally.

[0030] In this embodiment: During the charging and discharging process, when the battery pack 2 thermally expands, the thermoplastic polyurethane elastomer 172 is deformed by the compression of the battery pack 2. This avoids using an overly fixed structure to fix the position of the battery pack 2 and prevents it from being excessively compressed or deformed. Heat circulates inside the battery compartment 15 and is discharged through the drain hole 153. During the use of the electric vehicle, the thermoplastic polyurethane elastomer 172 can provide buffer protection for the battery pack 2, preventing the battery pack 2 from directly impacting the battery compartment 15 and affecting the safety of the battery pack 2.

[0031] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A lightweight body for an electric vehicle, comprising a frame base (1), characterized in that: A battery compartment (15) is installed at the top of the frame bottom (1). Inside the battery compartment (15) are partitions A (151) and B (152), which are installed in a cross manner. A battery pack (2) is installed inside the battery compartment (15). A cover (16) is provided inside the battery compartment (15) and at the top of the battery pack (2). Protective components (17) are embedded in the four corners of the battery compartment (15). A bottom hole (154) is opened through the bottom of the battery compartment (15). Rubber semicircles (156) are installed on both sides of the bottom of the battery compartment (15) and the bottom of the bottom hole (154).

2. The lightweight electric vehicle body according to claim 1, characterized in that: A dense mesh B (158) is installed at the bottom of the bottom hole (154). Moisture-absorbing particles (155) are provided at the top of the dense mesh B (158) and inside the bottom hole (154). A dense mesh A (157) is provided inside the bottom hole (154) and at the top of the moisture-absorbing particles (155).

3. The lightweight electric vehicle body according to claim 2, characterized in that: An inclined guide bar (18) is installed at the bottom end of the battery compartment (15) and on one side of the bottom hole (154), and the bottom end of the inclined guide bar (18) is below the bottom hole (154). A drain hole (153) is opened on the inner wall of the battery compartment (15).

4. The lightweight electric vehicle body according to claim 1, characterized in that: An internal frame (11) is installed inside the frame bottom (1) and at the lower end of the battery compartment (15), and a filter (14) is installed at the top of the internal frame (11).

5. The lightweight electric vehicle body according to claim 4, characterized in that: Inside the built-in frame (11) and at the bottom of the filter screen (14), there are inclined rods (13) and horizontal rods (12), and the horizontal rods (12) are located at the intersection of the inclined rods (13).

6. The lightweight electric vehicle body according to claim 1, characterized in that: The protective component (17) includes an L-shaped inner plate (171), the inner wall of which is fitted with a thermoplastic polyurethane elastomer (172), and the thermoplastic polyurethane elastomer (172) is provided in multiple sets.

Images