CN105291800A - Hybrid power automobile IPU fixing structure - Google Patents

Abstract

The invention discloses a hybrid power automobile IPU fixing structure which comprises an IPU assembly. The hybrid power automobile IPU fixing structure is characterized in that the IPU fixing structure further comprises a fixing support, the fixing support comprises a front cross beam and a rear cross beam, the two ends of the front cross beam and the two ends of the rear cross beam are detachably connected to the upper portion of a left longitudinal beam and a right longitudinal beam of a rear floor respectively, and two longitudinal connecting beams are fixedly connected between the front cross beam and the rear cross beam; the front cross beam and the rear cross beam are each provided with multiple IPU assembly fixing frames at intervals, and the IPU assembly fixing frames are located between the two longitudinal connecting beams; the IPU assembly is connected with the IPU assembly fixing frames and arranged and overhung in a space formed by the front cross beam, the rear cross beam and the two longitudinal connecting beams in an enclosure mode. By means of the hybrid power automobile IPU fixing structure, a battery is protected against squeezing and prevented from breaking away from a fixed point when a vehicle encounters jolts or even is in the collision and tumbling process, and the safe and reliable effects are achieved.

Description

Hybrid car IPU fixed structure

technical field

The invention belongs to the technical field of body parts, and in particular relates to a fixing structure for various parts and assemblies of an IPU of a hybrid electric vehicle.

Background technique

Intelligent power control unit, English name: IntelligentPowerUnit, abbreviated as IPU, which includes: power battery and management system, motor controller, DC/DC converter and heat dissipation system and other components, which are unique components of hybrid electric vehicles. Since the front cabin of the car body has been arranged with components such as engine, gearbox and motor, it is already very crowded, so it is difficult to arrange the newly added IPU assembly in the front cabin. For a sedan with a fixed rear seat backrest, the IPU assembly can be installed behind the rear seat backrest. However, for an SUV model whose backrests of the rear seats can be turned over, it is almost the only option to arrange the IPU assembly at the rear floor at the bottom of the trunk. Considering the heat dissipation of the battery, rear collision, and the possibility of vehicle rollover accidents, how to safely fix the IPU assembly on the rear floor is a technical problem.

Due to the unique structural features of the IPU assembly components and the requirements for cooling and heat dissipation, how to design the IPU assembly frame structure and realize the installation and fixation of IPU components has also become a technical problem at present.

Talking about the cooling of the battery again, the power battery system is generally integrated in the closed battery pack case, which is convenient for the design of the air duct. Hybrid vehicles generally require multiple battery cells connected in series to meet the requirements of use. After multiple battery cells are arranged in a group, they have a relatively large weight. For the overall battery pack, the suspension type fixing method is adopted. How to securely fix the battery block with the battery pack shell and consider the feasibility of installation is also a problem. current technical problems.

Contents of the invention

The object of the present invention is to provide a hybrid electric vehicle IPU fixing structure with reliable fixing of battery pack, high heat dissipation efficiency and good safety.

In order to achieve the above object, the hybrid electric vehicle IPU fixing structure designed by the present invention includes an IPU assembly, and is characterized in that: it also includes a fixing bracket, and the fixing bracket includes two ends that are detachably connected above the left and right longitudinal beams of the rear floor. The front crossbeam and the rear crossbeam are fixedly connected with two longitudinal connecting beams between the front crossbeam and the rear crossbeam; a plurality of IPU assembly fixing brackets are arranged at intervals on the front crossbeam and the rear crossbeam, and the IPU assembly fixing brackets are located at Between the two longitudinal connecting beams; the IPU assembly is connected to the IPU assembly fixing frame, and placed and suspended in the space enclosed by the front beam, the rear beam and the two longitudinal connecting beams.

Preferably, a mounting bracket is welded at both ends of the front beam and the rear beam, and the mounting bracket is provided with mounting holes, and two mounting brackets adapted to the mounting bracket are welded above the left beam of the floor and the right beam of the floor. The bracket plate, the positioning and fixing bolts adapted to the mounting holes are welded on the mounting bracket plate. In this way, the detachable connection between the front and rear beams and the left and right longitudinal beams of the floor is realized through the mounting bracket and the mounting bracket plate.

As a preferred solution, the IPU assembly includes a lower case and an upper cover plate, the lower case is suspended in the space surrounded by the front crossbeam, the rear crossbeam and two longitudinal connecting beams, the lower case The upper cover plate is connected with the IPU assembly fixing frame; the lower housing is provided with an IPU assembly, and the IPU assembly includes a battery block, a battery management system, a high voltage relay, a motor controller, and a DC/DC converter.

Preferably, the lower casing includes two side plates and two sealing plates welded to form an integral body with an upper end opening, and the top of the side plates is provided with an eaves, and the eaves are fitted and connected with the IPU assembly fixing bracket.

Further preferably, the inner wall of the side plate is provided with a first reinforcing beam, and the first reinforcing beam includes a first horizontal part and a second horizontal part, and the ends of the first horizontal part and the second horizontal part are respectively connected to each other. As for the connected connecting part, the first horizontal part and the second horizontal part are located on both sides of the connecting part; the first horizontal part is connected to the eaves, and the second horizontal part is connected to the bottom of the lower casing.

Preferably, the middle part of the upper cover plate is higher than its outer periphery, and a plurality of longitudinal second reinforcement beams are provided at intervals on the inner side of the upper cover plate. In this way, it is beneficial to enhance the strength of the upper cover plate.

Further preferably, the second reinforcement beam, the lower shell and the upper cover are connected to the IPU assembly fixing frame by bolts.

As another preferred solution, the battery block is arranged into two groups by a plurality of battery cells, forming two cuboid battery packs and then clamped between the upper fixing plate and the lower fixing plate by bolts; the upper fixing plate It is connected with the top of the lower casing, and the lower fixing plate is connected with the bottom of the lower casing.

Preferably, the upper fixing plate includes an overlapping portion, a horizontal portion and a transition section connecting the overlapping portion and the horizontal portion, and the overlapping portion is higher than the horizontal portion.

Further preferably, two opposite outer edges of the horizontal portion are respectively provided with a first flange providing a fixing point for the battery management system and a second flange providing a fixing point for the high voltage relay.

Preferably, the two opposite outer edges of the lower fixing plate are respectively provided with a third flange providing a fixing point for the battery management system and a fourth flange providing a fixing point for the high voltage relay.

The beneficial effects of the present invention are: the present invention suspends the IPU assembly above the spare tire groove of the rear floor in a manner similar to lifting a sedan chair, and connects it to the left and right longitudinal beams of the rear floor. The components of the IPU are organically connected with the first reinforcing beam through the upper and lower fixing plates, and then located in the middle of the well-shaped fixing bracket, which ensures the strength of the fixing points of the IPU components; considering the vertical bottom surface of the side wall of the lower shell, Divide the lower shell into four parts, side panel and sealing panel, to achieve optimal manufacturability with the least number of blocks. The structural design of the frame not only meets the installation requirements of IPU components, but also meets the fixing requirements on the vehicle body. ;Connect the eaves of the lower housing of the battery pack and the bottom end of the first reinforcing beam through the upper and lower fixing plates of the battery pack, and securely fix the battery pack between the first reinforcing beam and the upper and lower fixing plates that are associated with each other At the same time, the battery management system and high-voltage relay are fixed on the left and right sides of the battery block to form a stable and reliable battery block fixing structure, which can meet the local strength requirements and the protection requirements for the battery during the rear collision. The fixing structure of the invention can protect the battery from being squeezed and not detached from the fixing point when the vehicle encounters bumps, even collisions and rollovers, thereby achieving safe and reliable effects.

Description of drawings

Fig. 1 is a schematic diagram of the installation structure of the IPU assembly of the present invention on the vehicle body

Fig. 2 is the structural representation of mounting bracket plate of the present invention

Fig. 3 is the structural representation of fixed bracket of the present invention

Fig. 4 is a schematic diagram of the shell structure of the IPU assembly of the present invention

Fig. 5 is a schematic diagram of the installation structure of the IPU assembly of the present invention

Fig. 6 is a schematic diagram showing the exploded structure of the IPU assembly housing of the present invention

Fig. 7 is the structural representation of side plate of the present invention

Fig. 8 is the structural representation of sealing plate of the present invention

Fig. 9 is a schematic structural view of the upper cover plate of the present invention

Fig. 10 is a schematic diagram of a cross-sectional structure of the present invention after assembly

Fig. 11 is a schematic structural view of the upper fixing plate of the present invention

Fig. 12 is a schematic structural view of the lower fixing plate of the present invention

detailed description

The technical solution of the present invention (including the preferred technical solution) will be described in further detail below by way of Fig. 1 to Fig. 12 and enumerating some optional embodiments of the present invention. Any technical features and any technical solutions in this embodiment are The protection scope of the present invention is not limited.

As shown in Figures 1 to 3, the IPU fixing structure of the hybrid electric vehicle designed by the present invention includes an IPU assembly 1 and a fixing bracket 2, and the fixing bracket 2 includes two ends detachably connected to the left side beam 3 of the rear floor and the rear floor The front crossbeam 2.1 and the rear crossbeam 2.2 above the right longitudinal beam 4, two longitudinal connecting beams 2.3 are fixedly connected between the front crossbeam 2.1 and the rear crossbeam 2.2; multiple IPUs are arranged at intervals on the front crossbeam 2.1 and the rear crossbeam 2.2 Assembly fixing frame 2.4, the IPU assembly fixing frame 2.4 is located between two longitudinal connecting beams 2.3; the IPU assembly 1 is connected with the IPU assembly fixing frame 2.4, and placed and suspended on the front In the space enclosed by the crossbeam 2.1, the rear crossbeam 2.2 and the two longitudinal connecting beams 2.3. In the present invention, the spare tire on the rear floor is canceled, and the groove of the spare tire is reserved. On both sides of the rear floor, above the left and right longitudinal beams, four mounting bracket plates 5 of the IPU assembly 1 are welded, and the front beam 2.1 and A mounting bracket 2.5 is welded at both ends of the rear crossbeam 2.3, and the mounting bracket 2.5 is provided with mounting holes, and two mounting bracket plates adapted to the mounting bracket 2.5 are respectively welded on the top of the left floor beam 3 and the right floor beam 4 5. The positioning and fixing bolts 5.1 adapted to the mounting holes are welded on the mounting bracket plate 5; the welding of the mounting bracket plate 5 and the side beams of the rear floor and the rear floor can be realized by spot welding or gas shielded welding. In this way, Through the mounting bracket 2.5 and the mounting bracket plate 5, the detachable connection of the front and rear beams and the left and right longitudinal beams of the floor is realized. The IPU assembly 1 is suspended between the left longitudinal beam 3 of the rear floor and the right longitudinal beam 4 of the rear floor through the fixed bracket 2, and is located behind the middle beam 6 of the rear floor. The IPU assembly 1 is suspended in the spare tire groove of the rear floor , There is a certain gap with the spare tire groove on the rear floor to prevent the body deformation and the IPU assembly from vibrating up and down when the vehicle passes on uneven roads.

As shown in Figure 4 and Figure 5, as a preferred solution, the IPU assembly 1 includes a lower housing 1.1 and an upper cover 1.2, and the lower housing 1.1 is suspended from the front beam 2.1, the rear beam 2.2 and the two In the space enclosed by the root longitudinal connecting beam 2.3, the lower housing 1.1 and the upper cover plate 1.2 are connected to the IPU assembly fixing frame 2.4; the lower housing 1.1 is provided with an IPU assembly, and the IPU assembly includes The battery block 7, the battery management system 8, the high voltage relay 9, the motor controller 10, and the DC/DC converter, the DC/DC converter is located below the motor controller 10, not shown in the figure.

As shown in Figure 6, the lower casing 1.1 is composed of two side plates 1.11 and two sealing plates 1.12 welded to form a whole with an upper end opening, the top of the side plate 1.11 is provided with an eaves 1.13, and the eaves 1.13 and the The IPU assembly fixing bracket 2.4 is adapted for connection.

As shown in Fig. 6 and Fig. 7, the inner wall of the side plate 1.11 is provided with a first reinforcing beam 1.14, and the first reinforcing beam 1.14 includes a first horizontal part 1.141 and a second horizontal part 1.142, and the head and tail are respectively connected with the first A connecting portion 1.143 connecting one end of the horizontal portion 1.141 and the second horizontal portion 1.142, the first horizontal portion 1.141 and the second horizontal portion 1.142 are located on both sides of the connecting portion 1.143; the first horizontal portion 1.141 and the The eaves 1.13 are connected, and the second horizontal part 1.142 is connected with the bottom of the lower casing. The specific structural shape of the side plate 1.11 is mainly composed of the side wall 1.15, the half part of the bottom surface 1.16 and the eaves 1.13, wherein the side wall 1.15 is vertical to the bottom surface and the eaves 1.13, which is more conducive to the lower shell of the side wall perpendicular to the bottom surface, Optimum manufacturability with minimal parting. In order to improve the strength and rigidity of the thin plate, a plurality of first ribs 1.14 are provided. One of the two side walls 1.15 is provided with a cooling system air inlet pipe through hole 1.17 and a cable through hole 1.18. The eaves 1.13 are provided with a plurality of bolt connection via holes and welding positioning holes.

As shown in Figure 8, the specific structural shape of the sealing plate 1.12 is composed of a side wall 1.121, an upper edge 1.122, a lower edge 1.123, a front edge 1.124, and a rear edge 1.125. The upper edge 1.122 is a mounting surface provided for the upper cover plate 1.2, and is provided with bolt connection via holes and welding positioning holes. The lower edge 1.123, the front edge 1.124 and the rear edge 1.125 are welding edges to the side plate 1.11. Reinforcing ribs are provided on the side wall 1.121.

As shown in Fig. 6 and Fig. 9, the middle part of the upper cover plate 1.2 is higher than its outer periphery, and the inner side of the upper cover plate 1.2 is provided with a plurality of longitudinal second reinforcing beams 1.19 at intervals. The four longitudinal second reinforcing beams 1.19 have the same structure, are connected to the edge of the upper cover plate 1.2, and together with the upper cover plate 1.2 are connected to the eaves 1.13 by bolts, and then fixed together to the IPU assembly spanning the spare wheel groove of the rear floor In this way, it is beneficial to strengthen the strength of the upper cover plate 1.2, so that the upper cover plate 1.2 can carry the weight of luggage.

As shown in Figure 10, as another preferred solution, the battery block 7 is arranged in two groups by a plurality of battery cells to form two rectangular parallelepiped battery packs, and then clamped on the upper fixing plate 7.1 and the lower fixing plate by bolts Between 7.2; the upper fixing plate 7.1 is connected to the top of the lower housing 1.1, and the lower fixing plate 7.2 is connected to the bottom of the lower housing 1.1.

As shown in Figure 11, the upper fixing plate 7.1 includes an overlapping portion 7.11, a horizontal portion 7.12, and a transition section 7.13 connecting the overlapping portion 7.11 and the horizontal portion 7.12, and the overlapping portion 7.11 is higher than the horizontal portion 7.12; The overlapping part 7.11 is provided with a fixing hole, which is connected to the eaves 1.13, and the two opposite outer edges of the horizontal part 7.12 are provided with a first flange 7.14 respectively providing a fixing point for the battery management system 8, which is a high-voltage relay 9 A second flange 7.15 providing a fixed point. The overall design of the upper fixing plate 7.1 has weight-reducing holes and reinforcing ribs with sunken platforms, and it is as light as possible under the premise of ensuring strength.

As shown in FIG. 12 , the two opposite outer edges of the lower fixing plate 7.2 are provided with a third flange 7.21 providing a fixed point for the battery management system 8 and a fourth flange 7.22 providing a fixed point for the high voltage relay 9 respectively. The left and right ends shown in the figure are provided with holes, which are connected with the bottom of the lower casing 1.1.

As shown in Fig. 5 and Fig. 10, the battery block 7 is installed in the structural shape inside the lower casing 1.1. The battery management system 8 and the high-voltage relay 9 are assembled together with the battery block 7 through the upper fixing plate 7.1 and the lower fixing plate 7.2, and then installed in the lower casing 1.1 as an assembly. The first horizontal portion 1.141 and the second horizontal portion 1.142 of the reinforcing beam 1.14 are connected together. The fixing of lower fixed plate 7.2 is installed and tightened from bottom to top by bolts.

As shown in Fig. 10, the fixing of the battery block 7 is suspended by the upper fixing plate 7.1 and supported by the lower fixing plate 7.2. It can be seen from the sectional view that the upper fixing plate 7.1, the lower fixing plate 7.2 and the first reinforcing beam 1.14 form a closed loop, and the battery block 7 is in the closed loop. In addition, the front section of the upper fixing plate 7.1, the front section of the lower fixing plate 7.2, the first reinforcing beam 1.14, and the fixing long bolts 7.3 of the battery block 7 form a small closed loop on the front side of the battery block 7, and the rear side is the same . Furthermore, above the battery block 7, the upper fixing plate 7.1 and the second reinforcing beam 1.19 also form a closed loop, so that the battery block 7 is in a closely connected fixing bracket, and has a higher fixing point strength.

Claims (10)

1. a hybrid vehicle IPU fixed sturcture, comprise IPU assembly (1), it is characterized in that: also comprise fixed support (2), described fixed support (2) comprises two ends and is detachably connected on front cross rail (2.1) above the longeron of left and right limit, rear floor and after cross member (2.2), is fixedly connected with two vertical tie-beams (2.3) between described front cross rail (2.1) and after cross member (2.2); Front cross rail (2.1) and after cross member (2.2) are all interval with multiple IPU assembly fixed mount (2.4), and described IPU assembly fixed mount (2.4) is positioned between two vertical tie-beams (2.3); Described IPU assembly (1) is connected with described IPU assembly fixed mount (2.4), and inserts and be suspended in space that described front cross rail (2.1), after cross member (2.2) and two vertical tie-beams (2.3) surround.

2. hybrid vehicle IPU fixed sturcture according to claim 1, it is characterized in that: a mounting bracket (2.5) is all welded at described front cross rail (2.1) and after cross member (2.2) two ends, described mounting bracket (2.5) is provided with mounting hole, the mounting bracket plate (5) that on the right of the left side, described floor beam (3) and floor, each welding two in beam (4) top is adaptive with described mounting bracket (2.5), the location bolt of rear end plate (5.1) of the upper welding of described mounting bracket plate (5) and described mounting hole adaptation.

3. hybrid vehicle IPU fixed sturcture according to claim 1, it is characterized in that: described IPU assembly (1) comprises lower house (1.1) and upper cover plate (1.2), described lower house (1.1) is suspended in the space that described front cross rail (2.1), after cross member (2.2) and two vertical tie-beams (2.3) surround, and described lower house (1.1) is connected with described IPU assembly fixed mount (2.4) with upper cover plate (1.2); Described lower house is provided with IPU assembly in (1.1), and described IPU assembly comprises battery pack block (7), battery management system (8), high-voltage relay (9), electric machine controller (10), DC/DC changer.

4. hybrid vehicle IPU fixed sturcture according to claim 3, it is characterized in that: described lower house (1.1) comprises the entirety being formed upper end open by two pieces of side plates (1.11), two pieces of shrouding (1.12) welding, described side plate (1.11) top is provided with eaves (1.13), and described eaves (1.13) is connected with described IPU assembly fixed mount (2.4) adaptation.

5. hybrid vehicle IPU fixed sturcture according to claim 4, it is characterized in that: described side plate (1.11) inwall is provided with the first strength beam (1.14), described first strength beam (1.14) comprises the first horizontal part (1.141) and the second horizontal part (1.142), the connecting portion (1.143) that head and the tail are connected with described first horizontal part (1.141) and the second horizontal part (1.142) end, one end respectively, described first horizontal part (1.141) and the second horizontal part (1.142) are positioned at the both sides of described connecting portion (1.143), described first horizontal part (1.141) is connected with described eaves (1.13), and described second horizontal part (1.142) is connected with lower house (1.1) bottom.

6. hybrid vehicle IPU fixed sturcture according to claim 3, it is characterized in that: described upper cover plate (1.2) middle part is higher than its periphery, and described upper cover plate (1.2) clear width is provided with multiple longitudinal direction second strength beam (1.19).

7. hybrid vehicle IPU fixed sturcture according to claim 6, is characterized in that: described second strength beam (1.19), lower house (1.1) and upper cover plate (1.2) are connected with described IPU assembly fixed mount (2.4) by bolt.

8. hybrid vehicle IPU fixed sturcture according to claim 3, it is characterized in that: battery pack block (7) is arranged in two groups by multiple battery cell, form two rectangular-shaped battery pack and be then bolted and be clamped between upper mounted plate (7.1) and bottom plate (7.2); Fixed plate (7.1) is connected with described lower house (1.1) top, and described bottom plate (7.2) is connected with described lower house (1.1) bottom.

9. hybrid vehicle IPU fixed sturcture according to claim 8, it is characterized in that: fixed plate (7.1) comprises clinch (7.11), horizontal part (7.12) and is connected the transition phase (7.13) of clinch (7.11) and horizontal part (7.12), and described clinch (7.11) is higher than described horizontal part (7.12).

10. hybrid vehicle IPU fixed sturcture according to claim 9, is characterized in that: the outer that described horizontal part (7.12) two is relative is equipped with and is respectively battery management system (8) and provides first flange (7.14) of attachment point, provide second flange (7.15) of attachment point for high-voltage relay (9); The outer that described bottom plate (7.2) two is relative is equipped with the 4th flange (7.22) being respectively battery management system (8) and providing the 3rd flange (7.21) of attachment point, provide attachment point for high-voltage relay (10).