Power battery pack side collision force dispersing device

Abstract

The utility model provides a power battery pack side collision force dispersing device which comprises a battery box, arch-shaped anti-collision beams and an energy absorption box, the battery box is provided with transverse plates and longitudinal plates and is divided into a plurality of battery grooves used for containing battery modules, the arch-shaped anti-collision beams are installed on the left side and the right side of the battery box, and the energy absorption box is connected with the arch-shaped anti-collision beams. The arch-shaped structure of the arch-shaped anti-collision beam can transmit side collision force along the transverse plate and the longitudinal plate, and the energy absorption boxes are installed at the front end and the rear end of the longitudinal plate of the battery box. The arch-shaped anti-collision beam has the advantages that when side collision occurs, the arch-shaped anti-collision beam disperses and transmits collision force to the transverse plate and the longitudinal plate through the supporting bosses, the arch height of the anti-collision beam is much smaller than the span, collision component force borne by the transverse plate is also much smaller, the situation that the transverse plate extrudes the battery module due to bending deformation can be prevented, most collision energy is transmitted to the longitudinal plate, and the battery module is prevented from being damaged. And the energy absorption boxes mounted at the two ends of the longitudinal plate can collapse to absorb collision energy, so that the possibility of short-circuit fire and even explosion caused by collision damage of the power battery can be effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of new energy vehicle battery safety technology, specifically to a side impact force dispersion device for a power battery pack. Background Technology

[0002] With the promotion of new energy vehicles in my country, the number of electric vehicles on the road is increasing year by year. As the sole power source for pure electric vehicles, the battery pack is installed in the middle of the vehicle, and its structural safety is crucial to the overall vehicle safety. Compared with frontal and rear-end collisions, the battery pack has less space for energy absorption in side collisions, and the conditions are more severe. The battery pack itself acts as a path for the transfer of collision energy, and under compression and impact, the modules inside the battery pack may burn or explode.

[0003] To address these issues, this invention proposes a side impact force dispersion device for a power battery pack. This device rationally alters the energy transmission path of side impacts, enhances the energy absorption capacity of the battery box, reduces the burden on the power battery pack housing, minimizes damage to the battery modules, and improves the safety of the power battery pack in side impacts within a limited installation space. Summary of the Invention

[0004] The purpose of this invention is to provide a side impact force dispersion device for a power battery pack, which achieves stable side impact force transmission and a reasonable energy absorption process, thereby improving the safety of the power battery pack.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A side impact force dispersion device for a power battery pack is used to reasonably transmit impact force and prevent the power battery pack from being squeezed, damaged, or even burned and exploded. It includes a battery box, an arched anti-collision beam, and an energy-absorbing box.

[0007] The battery box includes horizontal plates, vertical plates, and several battery slots formed by the plates. The battery slots contain battery modules. Arched anti-collision beams are installed on the left and right sides of the battery box, and energy-absorbing boxes are installed on the front and rear sides of the battery box.

[0008] In practical application, the side collision force dispersion device for the power battery pack of this utility model has an arched anti-collision beam installed on the left and right longitudinal plates of the battery box, and an energy-absorbing box installed on the front and rear transverse plates of the battery box. When the side of the longitudinal plate of the battery box is hit, the lateral collision force is transmitted to the transverse and longitudinal plates after passing through the arched anti-collision beam. Since the arch height of the arched anti-collision beam is much smaller than the span, the compression deformation of the transverse plate caused by the collision is also very small. Most of the collision force is borne by the longitudinal plate, and the tensile deformation of the longitudinal plate can be absorbed by the energy-absorbing box through collapse.

[0009] The optimized arched anti-collision beam includes an arched groove and supporting bosses. The arched groove is arc-shaped, and the supporting bosses are located at both ends of the arched groove. The number of supporting bosses is the same as the number of horizontal plates of the battery box.

[0010] The arched anti-collision beam is threadedly connected to the side plate of the battery box via a supporting boss.

[0011] The optimized version includes a first flange, a second flange, and an energy-absorbing box body.

[0012] The energy-absorbing box body is welded and fixed to the first flange and the second flange.

[0013] The first flange is threaded to the battery box, and the second flange is threaded to the vehicle body.

[0014] The optimized energy-absorbing box body includes an outer shell, an annular induction groove, and a porous core. The outer shell is conical, and the annular induction groove is evenly spaced along the surface of the conical outer shell. The cross-section of the annular induction groove is semi-circular.

[0015] The outer shell of the energy-absorbing box body is filled with a porous core, and a cylindrical clearance channel is provided in the center.

[0016] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0017] 1. Compared with the existing power battery pack collision force dispersion structure, this utility model sets arched anti-collision beams on the left and right sides of the battery box, which decomposes the side collision force through the support boss and transmits it along the longitudinal and transverse plates. Since the arch height of the arched anti-collision beam is much smaller than the span, most of the collision force is transmitted along the longitudinal plate. This arched structure can effectively distribute the load to both ends, so that the whole structure can withstand a large load and avoid the transverse plate from squeezing the battery module due to bending under pressure.

[0018] 2. This utility model installs energy-absorbing boxes at the front and rear of the battery box, and sets an induction groove on the outer shell of the energy-absorbing box. The inside is filled with a porous core, and a clearance channel is set to further reduce the maximum rigidity in the axial direction. It can effectively collapse and absorb energy. The collision energy is buffered by the collapse space, which can reduce the risk of the longitudinal plate bending and squeezing the battery module and avoid the possibility of combustion or even explosion. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the side impact force dispersion device of the power battery pack in this embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the arched anti-collision beam in an embodiment of this utility model;

[0021] Figure 3This is an exploded view of the energy-absorbing box in an embodiment of the present invention;

[0022] Figure 4 This is a full sectional view of the energy-absorbing box body in an embodiment of this utility model.

[0023] In the diagram: 1. Battery box; 2. Battery module; 3. Arched anti-collision beam; 4. Energy-absorbing box; 11. Horizontal plate; 12. Vertical plate; 31. Arched groove; 32. Support boss; 41. First flange; 42. Energy-absorbing box body; 43. Second flange; 421. Outer shell; 422. Annular guide groove; 423. Porous core; 424. Clearance channel Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. 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 scope of this utility model.

[0025] The terms “longitudinal,” “horizontal,” “up,” “down,” “front,” “back,” “left,” and “right” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the purpose of simplifying the description and do not 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 document.

[0026] like Figure 1 As shown, a side impact force dispersion device for a power battery includes a battery box 1, an arched anti-collision beam 3, and an energy-absorbing box 4. The battery box 1 includes a horizontal plate 11 and a vertical plate 12, as well as a plurality of battery slots 13 formed by separating them. The battery slots 13 are used to accommodate battery modules 2.

[0027] like Figure 1 , 2 As shown, arched anti-collision beams 3 are installed on the left and right sides of the battery box 1. The arched anti-collision beams 3 include arched grooves 31 and supporting bosses 32. The arched grooves can adopt structures such as circular arches, parabolic arches, and elliptical arches.

[0028] Furthermore, the supporting boss 32 corresponds to each of the horizontal plates 11, and the impact force on the arched structure is dispersed to the horizontal plates 11 and the vertical plates 12 through the supporting boss 32.

[0029] Furthermore, the number n of the supporting bosses 32 is equal to the number of the horizontal plates 11, therefore the number of arched grooves in the arched anti-collision beam 3 should be n-1.

[0030] like Figure 1 As shown, the battery box 1 has four energy-absorbing boxes 4 at the front and rear ends, respectively located at the ends of the left and right longitudinal plates 12. When the arched anti-collision beam 3 is subjected to a side collision, the collision energy transmitted along the longitudinal plate 12 can be absorbed by the energy-absorbing boxes 4 through collapse, reducing the bending deformation of the longitudinal plate 12 and reducing the risk of squeezing the battery module 2.

[0031] like Figure 1 , 3 As shown, the energy-absorbing box 4 includes a first flange 41, an energy-absorbing box body 42, and a second flange 43. The first flange 41 and the second flange 43 are welded and fixed to the energy-absorbing box body 42.

[0032] Furthermore, the first flange 41 is threadedly connected to the battery box 1, and the second flange 43 is threadedly connected to the vehicle body.

[0033] like Figure 3 As shown, the energy-absorbing box body 42 includes a shell 421, an annular induction groove 422, and a porous core 423.

[0034] like Figure 3 , 4 As shown, the outer shell 421 is conical in shape and can be made of aluminum alloy. The interior is filled with a porous core 423, which can be a closed-cell aluminum foam structure.

[0035] The optimized outer shell 421 is provided with annular induction grooves 422 at equal intervals along the conical surface, which can cause the energy absorption box body 42 to collapse step by step under the compression of the longitudinal plate, thereby improving the energy absorption stability.

[0036] The optimized cross-section of the annular guide groove 422 is semi-circular.

[0037] like Figure 4As shown, a cylindrical clearance channel 424 is provided at the center of the energy-absorbing box body 42, which can provide material flow space when the energy-absorbing box body 42 is compressed and collapsed. This utility model provides a side impact force dispersion device for a power battery pack, including a battery box, an arched anti-collision beam, and an energy-absorbing box. The battery box is provided with a horizontal plate and a vertical plate, which are separated into several battery slots for accommodating battery modules. Arched anti-collision beams are installed on the left and right sides of the battery box. The arched structure of the arched anti-collision beams can transmit the side impact force along the horizontal plate and the vertical plate. The energy-absorbing box is installed at the front and rear ends of the vertical plate of the battery box. The advantage of this application is that when a side collision occurs, the arched anti-collision beam disperses and transmits the collision force to the horizontal and vertical plates through the supporting boss. The arch height of the anti-collision beam is much smaller than the span, and the collision force received by the horizontal plate is also much smaller. This can prevent the horizontal plate from squeezing the battery module due to bending deformation. Most of the collision energy is transferred to the vertical plate, causing it to be stretched. The energy-absorbing boxes installed at both ends of the vertical plate can collapse and absorb the collision energy, which can effectively reduce the possibility of the power battery short-circuiting, catching fire, or even exploding due to impact damage.

[0038] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of this utility model.

Claims

1. A side impact force dispersion device for a power battery pack, characterized in that, The battery box (1), the arched anti-collision beam (3) and the energy-absorbing box (4) are included. The battery box (1) includes a horizontal plate (11) and a vertical plate (12) and a number of battery slots (13) formed by the horizontal plate (11) and the vertical plate (12). The battery slots (13) accommodate battery modules (2). The arched anti-collision beam (3) is installed on the left and right sides of the battery box (1). The energy-absorbing box (4) is installed on the front and rear sides of the battery box (1).

2. The power battery pack side impact force dispersion device according to claim 1, characterized in that, The arched anti-collision beam (3) includes several arched grooves (31) and several supporting bosses (32), wherein the arched grooves (31) and the supporting bosses (32) are spaced apart.

3. The power battery pack side impact force dispersion device according to claim 2, characterized in that, The support boss (32) is threaded to the side of the longitudinal plate (12), and the number of the support boss (32) is the same as the number of the transverse plate (11).

4. The power battery pack side impact force dispersion device according to claim 1, characterized in that, The energy-absorbing box (4) includes a first flange (41), an energy-absorbing box body (42), and a second flange (43).

5. The power battery pack side impact force dispersion device according to claim 4, characterized in that, The first flange (41) and the second flange (43) are welded and fixed to the energy-absorbing box body (42).

6. The power battery pack side impact force dispersion device according to claim 4, characterized in that, The first flange (41) is threaded to the battery box (1), and the second flange (43) is threaded to the vehicle body.

7. The power battery pack side impact force dispersion device according to claim 4, characterized in that, The energy-absorbing box body (42) includes a shell (421), an annular induction groove (422) and a porous core (423). The shell (421) is conical, and the annular induction groove (422) is provided at equal intervals along the surface of the conical shell. The cross-section of the annular induction groove (422) is semi-circular.

8. The power battery pack side impact force dispersion device according to claim 7, characterized in that, The outer shell (421) is filled with a porous core (423).

9. The power battery pack side impact force dispersion device according to claim 4, characterized in that, A cylindrical clearance channel (424) is provided at the center of the energy-absorbing box body (42).

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