Bearing frame, box body, power battery pack and electric automobile

Abstract

The utility model relates to the technical field of electric vehicles, and discloses a bearing frame, a box body, a power battery pack and an electric automobile. The second beam and the first beam are arranged in parallel at intervals; two ends of the first longitudinal beam are respectively connected with the same-side ends of the first cross beam and the second cross beam; the second longitudinal beams and the first longitudinal beams are arranged in parallel at intervals; two ends of the second longitudinal beam are respectively connected with the other same-side ends of the first cross beam and the second cross beam; the first cross beam, the second cross beam, the first longitudinal beam and the second longitudinal beam are each provided with a plurality of concave shells with upward openings and a plurality of convex shells with downward openings, wherein the convex shells are located on the edges of the concave shells. By arranging the concave shell and the convex shell, on the basis of improving the rigidity and strength performance, the bearing capacity and the deformation resistance are improved, the lightweight requirement is met, the energy density of a subsequent power battery pack is improved, the cost is reduced, and stress concentration of the bearing frame is effectively released.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric vehicle technology field, concretely relates to a bearing frame, box, power battery pack and electric car. BACKGROUND

[0002] The power battery pack of electric passenger car generally mainly includes: box, battery module, heat management system and electrical system etc. The box generally includes: box main body, bearing frame and lifting lug etc. The box main body and bearing frame provide firm and reliable spatial arrangement and safety protection for the battery module, heat management system and electrical system.

[0003] Generally, the quality of power battery pack is mainly concentrated on the battery module, and the battery module is located in the box main body. Generally, only the rigidity of the box main body is difficult to bear the battery module with large quality, so it is generally necessary to increase the bearing frame in the box main body to improve the rigidity performance and strength performance of the box as a whole, improve the bearing property of the box, and realize the good and excellent force transmission performance between the battery module and the box. The most commonly used way to improve the bearing capacity is to increase the thickness of the bearing frame. The effect of the above-mentioned way is quite direct and obvious, but the bearing frame will be bulky, and the cost will also be increased accordingly, which is difficult to meet the requirement of light weight, and at the same time, the stress concentration of the bearing frame is also difficult to effectively release. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model provides a bearing frame to solve the problems that the cost is obviously increased by increasing the thickness of the bearing frame to improve the bearing capacity of the box, it is difficult to meet the requirement of light weight, and the stress concentration of the bearing frame is difficult to effectively release.

[0005] In the first aspect, the utility model provides a bearing frame, which comprises:

[0006] The first horizontal beam is connected with the end of the first vertical beam on the same side.

[0007] The second horizontal beam is arranged in parallel with the first horizontal beam.

[0008] The first vertical beam is connected with the end of the first horizontal beam on the same side.

[0009] A second longitudinal beam is arranged in parallel with the first longitudinal beam with a spacing, and two ends of the second longitudinal beam are connected with the other ends of the first transverse beam and the second transverse beam on the same side, respectively; the first transverse beam, the second transverse beam, the first longitudinal beam and the second longitudinal beam are all provided with a plurality of concave housings with openings upward and convex housings with openings downward located at edges of the concave housings. Beneficial effects: the technical scheme is adopted, the concave housings and the convex housings are arranged, the carrying capacity and the deformation resistance are improved on the basis of improving the rigidity and the strength, the lightweight requirement is met, the energy density of the subsequent power battery pack is improved, the cost is reduced, the stress concentration of the carrying frame is effectively released, the carrying frame can adapt to complex and changeable load conditions, the structure is simple, and the carrying frame is easy to process and mass-produce. The concave housings and the convex housings are similar to "protective covers", can provide stable protection and support for the subsequent battery module, can absorb and disperse the energy caused by the collision when the passenger car is impacted by external force or collides, reduce the direct damage of the impact force to the battery module, and reduce the probability of dangerous conditions such as damage, fire and explosion of the battery module.

[0010] Optionally, the concave housings are arranged in the transverse direction and / or in the longitudinal direction.

[0011] Optionally, further comprising:

[0012] At least one intermediate longitudinal beam is arranged in parallel with the first longitudinal beam; the intermediate longitudinal beam is located between the first longitudinal beam and the second longitudinal beam; and two ends of the intermediate longitudinal beam are connected with the first transverse beam and the second transverse beam, respectively. The technical scheme is adopted, the intermediate longitudinal beam is arranged, the strength and the rigidity of the whole carrying frame are further improved, and then the carrying capacity is improved.

[0013] Optionally, a plurality of heat dissipation holes are arranged in the concave housings. The technical scheme is adopted, the heat dissipation space is reserved for the subsequent heat dissipation channel applied to the power battery pack, heat dissipation of the battery module is facilitated, and the service life of the power battery pack is prolonged.

[0014] Optionally, edges of the concave housings and the convex housings are connected through round corners. The technical scheme is adopted, and the stress concentration is further reduced.

[0015] In a second aspect, the utility model also provides a box, comprising:

[0016] The carrying frame;

[0017] A box body is located below the carrying frame, and the box body is matched with and connected with the outer shape of the carrying frame;

[0018] A plurality of lifting lugs are arranged on the outer edges of the box body, respectively.

[0019] Optionally, the lifting lug is connected with the edge of the bearing frame.

[0020] In a third aspect, the utility model also provides a power battery pack, including:

[0021] The box body;

[0022] The battery module is arranged in the box body;

[0023] The thermal management system is arranged in the box body;

[0024] The electrical system is arranged in the box body.Beneficial effect: the application adopts the above technical scheme, the bearing frame integrates the box body and the battery module together, forms a whole, the bearing frame is as intermediate "tie", makes the power battery pack form a firm whole structure, helps to reduce the mutual extrusion and collision of the battery module inside under the complex road condition, thereby guaranteeing the normal work of the battery module.

[0025] In a fourth aspect, the utility model also provides an electric vehicle, including:

[0026] The vehicle body;

[0027] The power battery pack is connected with the vehicle body through multiple lifting lugs. Beneficial effect: the application adopts the above technical scheme, can effectively transmit the force that the battery module receives through the box body and the lifting lug to the vehicle body, further improves the safety and stability of the power battery pack.

[0028] Optionally, the electric vehicle is an electric passenger car. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor according to these drawings.

[0030] Figure 1 It is the three-dimensional structure schematic diagram of the bearing frame provided in the embodiment of the utility model;

[0031] Figure 2 It is the three-dimensional structure schematic diagram of the bearing frame provided in the embodiment of the utility model; Figure 1

[0032] Figure 3 It is the three-dimensional structure schematic diagram of the bearing frame provided in the embodiment of the utility model;Figure 2 ;

[0033] Figure 4 This is a partial three-dimensional structural diagram of the load-bearing frame provided in the embodiment of this utility model. Figure 3 ;

[0034] Figure 5 This is a partial three-dimensional structural diagram of the box provided in the embodiment of this utility model;

[0035] Figure 6 This is a three-dimensional exploded view of the power battery pack provided in the embodiment of this utility model;

[0036] Figure 7 This is a three-dimensional structural diagram of the power battery pack provided in the embodiment of this utility model.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. First crossbeam; 2. Second crossbeam; 3. First longitudinal beam; 4. Second longitudinal beam; 5. Middle longitudinal beam; 6. Heat dissipation holes; 7. Load-bearing frame; 8. Box body; 9. Lifting lugs; 10. Battery module. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0040] like Figures 1 to 4 One specific embodiment of the load-bearing frame shown includes: a first crossbeam 1, a second crossbeam 2, a first longitudinal beam 3, a second longitudinal beam 4, and at least one intermediate longitudinal beam 5. Combined with... Figure 6 and Figure 7 The supporting frame serves as the weight carrier for the battery module 10, which can constrain the movement of the battery module 10 and improve the rigidity and strength of the power battery pack.

[0041] like Figure 1As shown, the second cross beam 2 is arranged in parallel with the first cross beam 1. The two ends of the first longitudinal beam 3 are connected to the same side of the first cross beam 1 and the second cross beam 2. The second longitudinal beam 4 is arranged in parallel with the first longitudinal beam 3; the two ends of the second longitudinal beam 4 are connected to the other same side of the first cross beam 1 and the second cross beam 2. The first cross beam 1, the second cross beam 2, the first longitudinal beam 3 and the second longitudinal beam 4 are all provided with a plurality of concave housings with openings upward and convex housings with openings downward located at the edges of the concave housings. Figure 1 An intermediate longitudinal beam 5 is arranged in the middle, which is arranged in parallel with the first longitudinal beam 3; the intermediate longitudinal beam is located between the first longitudinal beam 3 and the second longitudinal beam 4; and the two ends of the intermediate longitudinal beam 5 are connected to the first cross beam 1 and the second cross beam 2. Specifically, the first cross beam 1, the second cross beam 2, the first longitudinal beam 3, the second longitudinal beam 4 and the intermediate longitudinal beam 5 can be connected by welding, which can be gas shielded welding and / or resistance welding. The load-bearing frame is a square large frame with good integrity, and the rigidity can be greatly improved by arranging the concave housings and the convex housings, which is better than the ordinary lap beams. The first cross beam 1 is connected perpendicularly to the first longitudinal beam 3, and the intermediate longitudinal beam 5 is connected perpendicularly to the first cross beam 1.

[0042] As shown in Figures 2 to 4 The concave housings are arranged in the transverse direction and / or in the longitudinal direction. Further, a plurality of heat dissipation holes 6 are arranged in the concave housings, which can be round holes or long round holes corresponding to the long concave housings. The edges of the concave housings and the convex housings are transitioned by round corners.

[0043] Referring to Figures 5 to 7 A specific embodiment of the box body is shown, which comprises the load-bearing frame 7, the box body 8 and a plurality of lifting lugs 9. The load-bearing frame 7 and the box body 8 are both stamping parts.

[0044] The box body 8 is located below the load-bearing frame 7, and the shape of the box body 8 matches and is connected to the load-bearing frame 7. A plurality of lifting lugs 9 are arranged on the outer edges of the box body 8. The lifting lugs 9 are connected to the edges of the load-bearing frame 7, which can be welding, and the welding can be arc spot welding. Specifically, the box body 8 is connected to the load-bearing frame 7 by welding, which can be resistance welding or arc spot welding. The box body 8 is a square shape that matches the load-bearing frame 7. The lifting lug 9 can be a plate member provided with three connecting holes, and the lifting lug 9 can also be a bent plate member, and the connecting holes are arranged on the horizontal part of the upper part of the bent plate member.

[0045] As shown in Figure 6 and Figure 7As shown, the utility model still provides a kind of power battery pack, it includes: the box, battery module 10, thermal management system and electrical system.The battery module 10, thermal management system and electrical system are all arranged in the box, specifically can install battery module, thermal management system and electrical system on the load frame 7 in the box by fastener, the fastener can be bolt.It is actually verified, the modal of power battery pack described in the application is 35.8Hz, greater than general road excitation and vehicle body excitation, to avoid the resonance and noise caused by above-mentioned excitation, to further influence the normal work of power battery pack;In mechanical performance, the power battery pack described in the application can meet the basic requirements of random vibration, mechanical impact, simulated collision and extrusion and other working conditions in national standard.

[0046] The utility model also provides a kind of electric vehicle, it includes: vehicle body and the power battery pack described, the power battery pack is connected with the vehicle body by multiple lugs 9.Specifically, the electric vehicle is electric passenger car, electric passenger car generally refers to pure electric passenger car.Lug 9 is connected with the vehicle body by fastener, fastener can be bolt.

[0047] Although the embodiments of the utility model are described in combination with the drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the utility model, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A load bearing frame, characterized in that, Comprising: a first cross beam (1); a second cross beam (2) arranged in parallel with the first cross beam (1) with a spacing; a first longitudinal beam (3) with two ends respectively connected to the same side end of the first cross beam (1) and the second cross beam (2); a second longitudinal beam (4) arranged in parallel with the first longitudinal beam (3) with a spacing; the two ends of the second longitudinal beam (4) are respectively connected to the other same side end of the first cross beam (1) and the second cross beam (2); the first cross beam (1), the second cross beam (2), the first longitudinal beam (3) and the second longitudinal beam (4) are all provided with a plurality of concave housings with openings upward and convex housings with openings downward located at the edges of the concave housings.

2. The load bearing frame of claim 1, wherein, The concave housings are arranged in the transverse direction and / or in the longitudinal direction.

3. The load bearing frame of claim 1, wherein, Further comprising: at least one intermediate longitudinal beam (5) arranged in parallel with the first longitudinal beam (3); the intermediate longitudinal beam is located between the first longitudinal beam (3) and the second longitudinal beam (4); and the two ends of the intermediate longitudinal beam (5) are respectively connected to the first cross beam (1) and the second cross beam (2).

4. The load bearing frame of claim 1, wherein, A plurality of heat dissipation holes (6) are arranged in the concave housings.

5. The load bearing frame of claim 1, wherein, The edges of the concave housings and the convex housings are all transitioned through round corners.

6. A case characterized by, Comprising: the load-bearing frame (7) according to any one of claims 1-5; a box body (8) located below the load-bearing frame (7), and the box body (8) is matched with the outer shape of the load-bearing frame (7) and connected; a plurality of lifting lugs (9) arranged on the outer edges of the box body (8) respectively.

7. The case of claim 6, wherein, The lifting lugs (9) are connected to the edges of the load-bearing frame (7).

8. A power battery pack, characterized in that, Comprising: the box according to claim 6 or 7; a battery module (10) arranged in the box; a thermal management system arranged in the box; an electrical system arranged in the box.

9. An electric vehicle, characterized by Comprising: a vehicle body; the power battery pack according to claim 8 is connected to the vehicle body through the plurality of lifting lugs (9).

10. The electric vehicle of claim 9, wherein, The electric vehicle is an electric passenger car.

Images