CN215377577U

CN215377577U - Battery box, power battery pack assembly and new energy automobile

Info

Publication number: CN215377577U
Application number: CN202121108575.7U
Authority: CN
Inventors: 王磊
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2021-05-21
Filing date: 2021-05-21
Publication date: 2021-12-31
Anticipated expiration: 2031-05-21

Abstract

The utility model provides a battery box, a power battery pack assembly and a new energy automobile, and belongs to the technical field of new energy, wherein the interior of the box body is divided into a plurality of placing rooms by longitudinal beams, a force transmission rib structure for side collision force transmission is arranged in a side wall assembly of the box body parallel to the longitudinal beams, the side wall assembly comprises a side wall main body, and an inner supporting part and an outer supporting part which are respectively arranged at two sides of the side wall main body, and the inner supporting part is provided with a mounting position for mounting a battery module in a matching manner; the force transmission rib structure sequentially penetrates through the outer supporting part, the side wall main body and the inner supporting part; the power battery pack assembly comprises battery boxes and battery modules which are correspondingly matched with the battery boxes in the placing rooms one by one; the long axis of the battery module is consistent with the length direction of the box body. According to the power battery pack assembly provided by the utility model, the battery module is longitudinally arranged on the automobile along the length direction of the whole automobile, and the force transmission rib structures are arranged on two sides of the battery module, so that the battery module can be prevented from being extruded by side collision, and the side collision prevention performance and the extrusion resistance of the whole pack are improved while the integration of the battery module is ensured.

Description

Battery box, power battery pack assembly and new energy automobile

Technical Field

The utility model belongs to the technical field of new energy, and particularly relates to a battery box, a power battery pack assembly and a new energy automobile powered by the power battery pack assembly.

Background

The power battery is used as a core component of the pure electric vehicle and is a source for providing electric quantity for the whole vehicle. Along with the increase of the driving range of the whole vehicle, higher requirements are also put forward on the electric quantity requirement of the power battery. Along with the increase of battery electric quantity and the improvement of battery energy density, the quantity of module and the volume of battery package also are constantly increasing, when satisfying the lightweight, require that the integration efficiency of battery package is higher. When the energy density of the battery reaches a certain bottleneck, the application of the non-standard large module is an effective way for solving the problems of light weight and high integration efficiency of the battery.

The integration of the nonstandard large module battery in the box that the tradition provided for standard battery module has following defect: firstly, the integration efficiency of the whole pack (the ratio of the energy density of the battery to the energy density of the whole pack) is influenced, and secondly, the mode of the whole pack of the battery is reduced, so that the mode requirement cannot be met.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a battery box which can meet the integration efficiency of a nonstandard large module battery and improve the mode of a whole package.

In order to achieve the above object, in a first aspect, an embodiment of the present invention provides a battery box, including a box body, the box body is divided into a plurality of placing compartments by longitudinal beams, and a force transmission rib structure for side collision force transmission is arranged in a side wall assembly of the box body parallel to the longitudinal beams; the side wall assembly comprises a side wall main body, an inner supporting part and an outer supporting part, wherein the inner supporting part and the outer supporting part are respectively arranged on two sides of the side wall main body; the force transmission rib structure sequentially penetrates through the outer supporting part, the side wall main body and the inner supporting part.

With reference to the first aspect, in one possible implementation manner, the force transmission rib structure includes a plurality of first force transmission ribs and a plurality of second force transmission ribs, the first force transmission ribs are disposed in the side wall main body, and the plurality of second force transmission ribs are disposed in the inner support portion; the first force transmission ribs are connected with the second force transmission ribs in a one-to-one correspondence mode to form a plurality of force transmission paths, so that side impact force is transmitted through the outer supporting portion in a dispersed mode along different force transmission paths.

With reference to the first aspect, in a possible implementation manner, the adjacent first power transmission ribs are arranged in different directions in an inclined manner; the adjacent second force transmission ribs are obliquely arranged in different directions, so that the force transmission paths have different force transmission directions.

With reference to the first aspect, in one possible implementation manner, the first force transmission rib and the second force transmission rib on the same force transmission path are arranged to be inclined in opposite directions.

With reference to the first aspect, in a possible implementation manner, the force transmission rib structure further includes a plurality of third force transmission ribs disposed in the outer support portion, and each of the third force transmission ribs is correspondingly connected to a different one of the first force transmission ribs.

With reference to the first aspect, in a possible implementation manner, the outer support portion is provided with a tilted bottom plate tilted downward, and the third force transmission rib includes a flat plate rib parallel to the bottom plate of the box body and a tilted plate rib connected between the side wall main body and the tilted bottom plate.

With reference to the first aspect, in a possible implementation manner, a fourth reinforcing rib parallel to the bottom plate of the box body is arranged in the longitudinal beam.

With reference to the first aspect, in one possible implementation manner, the bottom of the box body is provided with a cold plate.

With reference to the first aspect, in one possible implementation manner, an elastic supporting block is arranged between the cold plate and the bottom of the box body.

In a second aspect, the embodiment of the utility model further provides a power battery pack assembly; the battery box comprises a battery box and a plurality of battery modules, wherein the battery modules are correspondingly matched in the placing rooms one by one; the long axis of the battery module is consistent with the length direction of the box body.

Compared with the prior art, the battery box and the power battery pack assembly based on the battery box have the advantages that: (1) the box body is divided into a plurality of placing rooms through the longitudinal beams, the long axis of the non-standard large battery module is consistent with the length direction of the box body, and a larger battery module placing space can be formed in the box body with the same volume, so that the utilization rate of the internal space of the box body is improved, the integration efficiency of the non-standard large battery module is improved, and the height space of the whole package in the Z direction is reduced, so that the occupied space of the appearance volume of the whole package is saved, and the structural layout of the whole vehicle is optimized; (2) the battery module is indulged along whole car length direction and is put on the car, through on box both sides wall assembly, runs through the outer supporting part, the power transmission muscle structure that lateral wall main part and interior supporting part set up, can obtain the decay when receiving the crumple in-process that the side impact extrusion was bumped to the side to avoid the side to bump the extrusion force to the extrusion and the destruction of battery module, when guaranteeing that battery module is integrated, can improve the whole package prevent the side impact performance and anti extrusion performance, improve the mode of whole package.

In a third aspect, the embodiment of the utility model further provides a new energy automobile, wherein the power battery pack assembly is arranged on the automobile, and a long axis of the battery module is consistent with the length direction of the whole automobile.

According to the new energy automobile provided by the utility model, due to the installation of the power battery pack assembly, the integration of the battery module is ensured, the side collision resistance and the extrusion resistance of the whole pack can be improved, the mode of the whole pack is improved, and the power performance of the whole automobile is improved.

Drawings

Fig. 1 is an exploded view of a power battery pack assembly according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a rear side structure of the power battery pack assembly provided in FIG. 1;

FIG. 3 is a schematic diagram of an internal perspective structure of the power battery pack assembly provided in FIG. 1;

FIG. 4 is a schematic front view of the power battery pack assembly shown in FIG. 3;

FIG. 5 is a sectional view taken along line A-A of FIG. 4;

FIG. 6 is an enlarged schematic view of the force transmitting rib structure of FIG. 5;

FIG. 7 is a schematic diagram of force transmission of a power battery pack assembly according to an embodiment of the present invention;

FIG. 8 is an enlarged view of a portion of FIG. 5 at B;

FIG. 9 is an enlarged view of a portion of FIG. 5 at C;

fig. 10 is a schematic bottom structure diagram of a power battery pack assembly according to an embodiment of the present invention;

description of reference numerals:

1. a cover plate; 2. a BDU unit; 3. a box body; 4. a battery module; 5. a force transfer rib structure; 51. an inner support portion; 52. a second force transfer rib; 53. a sidewall body; 54. a first force transfer rib; 55. an outer support portion; 56. a third force transfer rib; 57. an installation position; 6. a stringer; 61. a fourth reinforcing rib; 7. a cold plate; 8. an elastic support block.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

Referring to fig. 1 to 5, a battery box according to the present invention will be described. The battery box comprises a box body 3, the interior of the box body 3 is divided into a plurality of placing rooms through longitudinal beams 6, and a force transmission rib structure 5 for side collision force transmission is arranged in a side wall assembly of the box body 3 parallel to the longitudinal beams 6; the side wall assembly comprises a side wall main body 53, an inner supporting part 51 and an outer supporting part 55 which are respectively arranged at two sides of the side wall main body 53, wherein the inner supporting part 51 is provided with a mounting position 57 for matching with and mounting the battery module 4; the force transfer tendon structure 5 passes through the outer support 55, the sidewall body 53 and the inner support 51 in sequence.

The battery box that this embodiment provided, the effect lies in: (1) the box body 3 is divided into a plurality of placing rooms through the longitudinal beams 6, the long axis of the non-standard large battery module is consistent with the length direction of the box body 3, a larger placing space for the battery module 4 can be provided in the box body 3 with the same volume, the utilization rate of the internal space of the box body 3 is improved, the integration efficiency of the non-standard large battery module is improved, the height space of the whole package in the Z direction is reduced, the occupied space of the appearance volume of the whole package is saved, and the structural layout of the whole vehicle is optimized; (2) an outer supporting part 55 and an inner supporting part 51 are respectively arranged inside and outside the side wall main body 53, and the force transmission rib structure 5 is arranged in a penetrating manner, so that a side impact force transmission path can be prolonged, and the side impact force attenuation effect is improved; meanwhile, the outer supporting portion 55 can prevent the side wall main body 53 from being impacted by a single layer and directly, attenuate the side impact force borne by the side wall main body 53, and attenuate through the inner supporting portion 51, thereby protecting the battery module 4 in the box body 3 from side impact. Illustratively, when the battery box is squeezed by side collision, the outer supporting portion 55 is first stressed and collapsed to be attenuated, and the side collision force is transmitted along the force transmitting rib structure to protect the battery module 4.

With respect to the provided inner support part 51 and outer support part 55, the inner support part 51 and the longitudinal beam 6 constitute a mounting support of the battery module 4, and specifically, mounting holes for bolts to pass through are provided on both the mounting position 57 of the inner support part 51 and the longitudinal beam 6 so as to facilitate mounting and fixing of the battery module 4; the outer support portion 55 facilitates the fixed mounting of the entire box 3 to the vehicle body, and specifically, the outer support portion 55 is also provided with a plurality of mounting holes for bolts to pass through. Therefore, for the stability of the installation, the upper plates of the inner support 51 and the outer support 55 are parallel to the bottom plate of the cabinet 3, and the heights of the inner support 51 and the outer support 55 are lower than the height of the sidewall body 53.

When this box 3 is applied to the car, nonstandard big battery module 4 indulges along whole car length direction and puts on the car, sets up power transmission muscle structure 5 on 3 both sides wall assemblies of box, can obtain the decay when receiving the extrusion of side impact force collapse in-process to avoid the side to bump the extrusion force to battery module 4 with destroy, when guaranteeing that battery module 4 is integrated, can improve the side of preventing of whole package and bump performance and anti extrusion performance, improve the mode of whole package.

The box 3 provided in this embodiment has a rectangular structure, and the longitudinal direction of the side member 6 coincides with the longitudinal direction of the box 3, and the space formed by the longitudinal members is rectangular.

It should be noted that, in the case 3 provided in this embodiment, the direction of the entire vehicle is taken as a reference, and the length direction of the entire vehicle is taken as a longitudinal direction, or an X direction; the width direction of the whole vehicle is taken as the transverse direction or the Y direction; the height direction of the whole vehicle is taken as the Z direction.

Based on the above orientation, referring to fig. 1, as an embodiment of the case 3 provided in this embodiment, a front frame is provided at the front end of the case 3, and a BDU unit 2 or a BMS system is provided in the front frame; a rear frame is provided at the rear end of the case 3, and a BMS system or BDU unit 2 is provided in the rear frame.

It is explained for the above noun that the BDU-Battery Disconnect Unit, the Battery pack disconnection Unit, is designed for the inside of the Battery pack, and is also one of the high voltage distribution boxes.

BATTERY management system (BATTERY MANAGEMENT SYSTEM) the BATTERY Management System (BMS) is a link between the BATTERY and the user, and the main object is the secondary BATTERY. The Battery Management System (BMS) is mainly to intelligently manage and maintain each battery cell in order to improve the utilization rate of the battery, prevent overcharge and overdischarge of the battery, prolong the service life of the battery, monitor the state of the battery, and the like.

As an improved embodiment of the casing 3, referring to fig. 5, 6, 7 and 9, the force transmission rib structure 5 includes a plurality of first force transmission ribs 54 provided in the side wall main body 53 and a plurality of second force transmission ribs 52 provided in the inner support portion 51; the first force transmission ribs 54 are connected with the second force transmission ribs 52 in a one-to-one correspondence manner to form a plurality of force transmission paths, so that the side impact force is transmitted dispersedly along different force transmission paths after passing through the outer support part 55. When the battery bears side impact extrusion, the outer supporting part 55 is firstly stressed and collapsed to be attenuated, then the side impact force is dispersed and transmitted along different force transmission paths to be further attenuated, and finally the battery module 4 is protected.

It should be noted that the case 3 provided herein is not only suitable for non-standard large battery modules, but also suitable for standard battery modules.

As shown in fig. 6 and 7, based on different force transmission paths, as a modified embodiment, adjacent first force transmission ribs 54 are arranged obliquely in different directions; adjacent second force transfer ribs 52 are arranged obliquely in different directions so that the force transfer paths have different force transfer directions. For example, when the battery module 4 receives the pressing force or the side impact force F in the direction shown in the drawing, the force transmission rib is inclined in different directions, so that not only the direction and the path of force transmission are changed, but also the path length of force transmission can be increased, and the effect of side impact force attenuation is increased by dispersing the side impact force and increasing the length of the force transmission path, thereby achieving the purpose of protecting the battery module 4. As an example of the inclined direction, the case 3 is divided into upper and lower directions in a use state thereof, and two adjacent first power transmission ribs 54 are inclined upward and downward, respectively, and the second power transmission ribs 52 which are correspondingly connected to each other are inclined downward and upward, respectively, to form force transmission paths which are bent in a dispersed manner. The inclination angle of the first power transmission rib 54 and the inclination angle of the second power transmission rib 52 may be different or the same.

As another modified embodiment of the force transmission path, as shown in fig. 6 and 7, the first force transmission rib 54 and the second force transmission rib 52 on the same force transmission path are inclined in opposite directions. The two force transmission paths are arranged in the embodiment, in the side impact force transmission direction, the first force transmission ribs 54 are sequentially arranged in a downward and upward inclined mode from bottom to top, the second force transmission ribs 52 are sequentially arranged in an upward and downward inclined mode from bottom to top, the side impact force is dispersed, and in the force transmission process of changing the direction and the paths, the side impact force can be gradually attenuated, and the stability of the attenuation process is guaranteed.

As shown in fig. 6, as a specific embodiment of the box body 3, the force transmission rib structure 5 further includes a plurality of third force transmission ribs 56 disposed in the outer support portion 55, and each of the third force transmission ribs 56 is correspondingly connected to a different first force transmission rib. The outer support portion 55 is disposed to prevent the side impact from directly striking the side wall body 53, thereby preventing the side wall body 53 from being directly struck by the side impact and damaging the battery module 4, and transmitting the side impact attenuated by the third force transmitting rib 56 backward to prevent the battery module 4 from being impacted by the side impact.

Since the outer support portion 55 is required to have a certain strength due to a large side impact, the third force transfer rib 56 inside thereof is not completely the same as the first force transfer rib 54, as shown in fig. 6, as an improved embodiment of the outer support portion 55, the outer support portion 55 is provided with a tilt floor inclined downward, and the third force transfer rib 56 includes a flat plate rib parallel to the floor of the box body 3 and a tilt plate rib connected between the side wall main body 53 and the tilt floor. In this embodiment, the inner space of the outer support portion 55 is enlarged by the arrangement of the diagonal plate rib, and the distance between the connection points of the outer support portion 55 and the side wall main body 53 is increased, thereby facilitating the dispersion and transmission and attenuation of the side impact force.

As shown in fig. 6, in the above embodiments, the inner support portion 51, the sidewall main body 53 and the outer support portion 55 all have cavities, the cavities have the functions of collapsing and absorbing energy, have a positive effect on attenuation of side impact, and each force transmission rib also has a reinforcing function, so as to improve the deformation resistance in the collapsing process; the cavity has the functions of collapsing and absorbing energy and also has the function of lightening the battery pack. In the embodiment, each force transmission rib extends along the length direction of the box body 3, and the wall thickness of each corresponding cavity wall is equal, so that each force transmission path can be smooth.

Fig. 5 and 8 show an embodiment of the side member 6, and a fourth bead 61 is provided in the side member 6. The fourth reinforcing rib 61 is parallel to the bottom plate of the box body 3 or is obliquely arranged, so that the reinforcing effect is achieved, and the deformation resistance of the longitudinal beam 6 can be improved.

The battery box provided by the embodiment utilizes the two longitudinal beams 6 to divide the box body 3 into three placing rooms, and the battery module 4 positioned in the middle is fixed on the longitudinal beams 6. Based on the concept of the present embodiment, the device may be further divided into two placing rooms, four placing rooms, and the like, which is not limited herein.

The box 3 provided in this embodiment has the above features, and referring to fig. 1, a cover plate 1 is further provided, and the cover plate 1 is provided with longitudinal and transverse reinforcing ribs.

Based on the above-mentioned force-transmitting rib structure, referring to fig. 10, as a modified embodiment, the bottom of the box body 3 is provided with a cold plate 7. The cold drawing 7 can dispel the heat to battery module 4, guarantees the good operating condition of battery module 4. Micro-pipes through which cooling water flows may be provided in the cold plate 7.

Optionally, a heat conducting pad or a heat conducting glue is arranged between the cold plate 7 and the battery module 4 to improve the heat conducting performance.

In order to improve the heat dissipation effect of the cold plate 7 and ensure a certain gap between the cold plate 7 and the bottom of the box 3, referring to fig. 10, as an embodiment, an elastic supporting block 8 is provided between the cold plate 7 and the bottom of the box 3. A plurality of elastic support blocks 8 which are uniformly arranged can ensure that the cold plate 7 has an effective distance with the bottom plate and simultaneously ensure that the cold plate 7 is in good contact with the module. The elastic supporting block is a rubber block or a spring and the like.

Based on the same inventive concept, referring to fig. 1, the utility model also provides a power battery pack assembly, which comprises a battery box and a plurality of battery modules 4, wherein the plurality of battery modules 4 are correspondingly adapted to each placing room one by one; the long axis of the battery module 4 coincides with the longitudinal direction of the case 3.

According to the power battery pack assembly provided by the utility model, as the long axis of the battery module 4 is consistent with the length direction of the box body 3, a larger battery module 4 placing space can be provided in the box body 3 with the same volume, the utilization rate of the internal space of the box body 3 is improved, the integration efficiency of utilizing non-standard large modules is improved, and the height space of the whole pack in the Z direction is reduced, so that the occupied space of the appearance volume of the whole pack is saved, and the structural layout of the whole vehicle is optimized; battery module 4 indulges along whole car length direction and puts on the car, and sets up power transmission rib structure 5 in both sides, can avoid the side to bump extrusion and destruction to battery module 4, when guaranteeing that battery module 4 is integrated, can improve whole package prevent that the side bumps performance and anti extrusion performance.

Based on the same invention concept, the embodiment of the utility model also provides a new energy automobile, wherein the automobile is provided with a power battery pack assembly, and the long axis of the battery module 4 is consistent with the length direction of the whole automobile. That is, battery module 4 is for whole car longitudinal arrangement, through the biography power muscle structure that box both sides wall assembly set up, avoids the side to bump the extrusion force to the extrusion and the destruction of battery module, when guaranteeing that battery module 4 is high-efficient integrated, can improve the whole package prevent that the side bumps performance and anti extrusion performance, improve the mode of whole package to improve the dynamic behavior of whole car.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The battery box is characterized by comprising a box body (3), wherein the box body (3) is internally divided into a plurality of placing rooms through longitudinal beams (6), and a force transmission rib structure (5) for side collision force transmission is arranged in a side wall assembly of the box body (3) parallel to the longitudinal beams (6); the side wall assembly comprises a side wall main body (53), an inner supporting part (51) and an outer supporting part (55) which are respectively arranged on two sides of the side wall main body (53), wherein the inner supporting part (51) is provided with a mounting position (57) for mounting the battery module (4) in a matching manner; the force transmission rib structure (5) sequentially penetrates through the outer supporting part (55), the side wall main body (53) and the inner supporting part (51).

2. The battery box according to claim 1, characterized in that the power transmission rib structure (5) includes a plurality of first power transmission ribs (54) and a plurality of second power transmission ribs (52), the first power transmission ribs (54) being provided in the side wall main body (53), the second power transmission ribs (52) being provided in the inner support portion (51); the first force transmission ribs (54) are correspondingly connected with the second force transmission ribs (52) one by one to form a plurality of force transmission paths, so that side impact force is transmitted in a dispersed manner along different force transmission paths after passing through the outer supporting part (55).

3. The battery box according to claim 2, wherein adjacent first force transmission ribs (54) are arranged obliquely in different directions; the adjacent second force transmission ribs (52) are arranged obliquely to different directions, so that the force transmission paths have different force transmission directions.

4. A battery box according to claim 3, characterized in that the first force transfer rib (54) and the second force transfer rib (52) on the same force transfer path are arranged obliquely in opposite directions.

5. A battery box according to claim 2, characterized in that said power transmission rib structure (5) further comprises a plurality of third power transmission ribs (56) provided in said outer support portion (55), each of said third power transmission ribs (56) being engaged with a different one of said first power transmission ribs (54).

6. A battery box according to claim 5, characterized in that the outer support (55) is provided with a sloping floor which slopes downwards, and the third force transfer rib (56) comprises a plate rib which is parallel to the floor of the box body (3) and a plate rib which is connected between the side wall body (53) and the sloping floor.

7. A battery box according to claim 1, characterized in that the longitudinal beams (6) are provided with fourth stiffening ribs (61) parallel to the bottom plate of the box body (3).

8. A battery box according to claim 1, characterized in that the bottom of the box (3) is provided with a cold plate (7).

9. A power battery pack assembly, characterized by comprising a battery box according to any one of claims 1 to 8 and a plurality of battery modules (4), wherein the battery modules (4) are fitted in the respective compartments of the box body (3) in a one-to-one correspondence; the long axis of the battery module (4) is consistent with the length direction of the box body (3).

10. The new energy automobile is characterized in that the automobile is provided with the power battery pack assembly according to claim 9, wherein the long axis of the battery module (4) is consistent with the length direction of the whole automobile.