Battery pack box body and battery pack

Abstract

The utility model provides a battery pack box body and a battery pack, the battery pack box body comprises a plurality of side coamings which are sequentially connected end to end to form a frame body; the two ends of the beam are connected with the two oppositely-arranged side surrounding plates respectively, and the interior of the frame body is divided into at least two containing areas for storing the battery modules by the beam; the reinforcing piece is connected to the beam and the side coaming, the reinforcing piece is provided with a buffer slope, and the buffer slope inclines in the direction from the side coaming to the beam; large cylindrical battery cells with large volume and large capacity can be placed in the battery pack box body, the requirements of partial vehicle types on the capacity of a battery system and the structural strength of the battery pack can be met, and the buffer slope of the reinforcing piece can buffer collision; therefore, the battery pack box body frame can bear side collision and front collision of the vehicle in the running process.

Description

Technical Field

[0001] The utility model relates to the technical field of battery products, and in particular to a battery pack box and a battery pack. Background Art

[0002] Some vehicle models have higher requirements on the battery system capacity and the structural strength of the battery pack. Specifically: the battery packs of the battery systems of these vehicle models are large in size, and have higher requirements on the battery packs for side and head-on collisions.

[0003] Large cylindrical battery cells have large capacity and can continuously output high power, making them suitable for equipment that works continuously for long periods of time. Relatively speaking, large cylindrical battery cells are relatively large in size and heavy in weight. Therefore, when large cylindrical battery cells are used in the above-mentioned models, it is difficult to meet the above-mentioned models' requirements for battery system capacity and structural strength of the battery pack, and it is difficult to withstand side and head-on collisions that the vehicle may suffer during driving. Utility Model Content

[0004] In order to overcome at least one of the defects described in the above-mentioned prior art, the utility model provides a battery pack case and a battery pack. Large cylindrical battery cells with large volume and capacity can be placed inside the battery pack case of the utility model, and the requirements of some vehicle models for battery system capacity and battery pack structural strength can be met, and the side collision and head-on collision suffered by the vehicle during driving can be withstood.

[0005] The technical solution adopted by the utility model to solve the problem is:

[0006] In a first aspect, a battery pack case is proposed, comprising: a plurality of side panels, which are connected end to end in sequence to form a frame; at least one beam, whose two ends are respectively connected to two oppositely arranged side panels, and the beam divides the interior of the frame into at least two accommodating areas for storing battery modules; and a reinforcement, which is connected to the beam and the side panels, and is provided with a buffer slope, which is inclined in the direction from the side panels to the beam.

[0007] Furthermore, two buffer slopes are provided on the reinforcement member, and the two buffer slopes are symmetrically arranged on both sides of the beam.

[0008] Furthermore, a first buffer hole is provided inside the buffer slope.

[0009] Further, the first buffer hole passes through the buffer slope, and the first buffer hole extends in a direction perpendicular to the axial direction of the beam.

[0010] Furthermore, the reinforcement member has a connecting groove and an expansion portion, the connecting groove is connected to the outer side of the middle portion of the expansion portion, the beam is connected to the connecting groove, and the expansion portion is connected to the side panel.

[0011] Furthermore, a second buffer hole is provided in the middle of the expansion portion and passes through the upper and lower surfaces thereof, and the second buffer hole extends in an axial direction perpendicular to the beam.

[0012] Furthermore, the beam includes a cross beam and a longitudinal beam, the two ends of the cross beam are respectively connected to the two side panels arranged opposite to each other, the two ends of the longitudinal beam are respectively connected to the other two side panels arranged opposite to each other, and the reinforcement is provided between the end of the cross beam and the side panel, and between the end of the longitudinal beam and the side panel.

[0013] Furthermore, the interior of the cross beam and / or the longitudinal beam is hollow, and the interior of the cross beam and / or the longitudinal beam is provided with reinforcing ribs intersecting horizontally and vertically.

[0014] Furthermore, a plurality of the side panels are connected end to end in sequence to form a square frame, and one of the side panels is configured as an anti-collision beam at the vehicle mounting point; the cross beam is perpendicular to the side panel connected thereto, and the longitudinal beam is perpendicular to the side panel connected thereto.

[0015] Furthermore, the battery pack box includes two cross beams, which are arranged side by side, and the longitudinal beam is perpendicular to the cross beams, and the longitudinal beam passes through the middle of the cross beams.

[0016] Furthermore, the reinforcement piece is connected to the end of the beam by riveting, and the reinforcement piece is welded to the side panel.

[0017] Furthermore, the battery pack case also includes a plurality of high-voltage busbars, which are stacked on the beams and are reinforced and connected by a plurality of quick-release structures. The high-voltage busbars are configured to be electrically connected to the battery module.

[0018] In a second aspect, a battery pack is also proposed, comprising a battery pack box as described in the first aspect and a plurality of battery modules; the battery modules are arranged in the accommodation area formed by the side panels and the beam structure.

[0019] The utility model provides a battery pack box and a battery pack. Compared with the prior art, the utility model has the following beneficial effects:

[0020] A plurality of side panels are connected end to end in sequence to form a frame, and the two ends of the beam are respectively connected to two oppositely arranged side panels to divide the interior of the frame into a plurality of accommodating areas for storing battery modules. The reinforcement is connected to the beam and the side panels so that the side panels and the beam form a stable battery pack box frame. The reinforcement can increase the contact area between the beam and the side panels, and when the vehicle collides sideways or head-on, the buffer slope on the reinforcement buffers the impact on the frame to maintain the stability of the battery module inside the frame. Therefore, the utility model can store large cylindrical batteries with large volume and capacity, and can meet the requirements of some vehicle models for battery system capacity and battery pack structural strength.

[0021] The utility model also proposes a battery pack using the above-mentioned battery pack box, and the battery pack can meet the vehicle's requirements for battery system capacity and battery pack structural strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of a battery pack according to an embodiment of the utility model;

[0023] Figure 2 for Figure 1 A magnified image of area A;

[0024] Figure 3 for Figure 1 Enlarged view of area B;

[0025] Figure 4 for Figure 1 A schematic diagram of the structure of the reinforcement of the battery pack shown in ;

[0026] Figure 5 for Figure 1 Schematic diagram of the box structure of the battery pack shown in;

[0027] Figure 6 for Figure 5 Schematic diagram of the connection relationship between the crossbeam and the longitudinal beam of the battery pack box shown in;

[0028] Figure 7 for Figure 5 Schematic diagram of the internal structure of the battery pack box crossbeam shown in;

[0029] Figure 8 for Figure 5 Schematic diagram of the internal structure of the battery pack box longitudinal beam shown in;

[0030] The meanings of the reference numerals are as follows:

[0031] 1. Side panel; 2. Crossbeam; 3. Longitudinal beam; 4. Frame; 5. Accommodation area; 6. Reinforcement member; 7. Connection groove; 8. Expansion portion; 9. Buffer slope; 10. First buffer hole; 11. Second buffer hole; 12. Reinforcement rib plate; 13. High-voltage busbar; 14. Quick-release structure; 15. Battery pack body; 16. Battery module. DETAILED DESCRIPTION

[0032] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0033] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0035] like Figure 1-Figure 8 As shown in the figure, an embodiment of the utility model proposes a battery pack box 15 in the first aspect, including: a plurality of side panels 1, which are connected end to end in sequence to form a frame; at least one beam, the two ends of the beam are respectively connected to two oppositely arranged side panels 1, and the beam divides the interior of the frame 4 into at least two accommodating areas 5 for storing battery modules 16; and a reinforcement 6, the reinforcement 6 is connected to the beam and the side panel 1, and the reinforcement 6 is provided with a buffer slope 9, and the buffer slope 9 is inclined from the side panel 1 to the beam.

[0036] Based on the above technical solution, multiple side panels 1 are connected end to end in sequence to form a frame 4, and the two ends of the beam are respectively connected to two oppositely arranged side panels 1, dividing the interior of the frame 4 into multiple accommodating areas 5 for storing battery modules 16. The reinforcement 6 is connected to the beam and the side panels 1 so that the side panels 1 and the beam form a stable battery pack box frame. The reinforcement 6 can increase the contact area between the beam and the side panels 1, and when the vehicle collides sideways or head-on, the buffer slope 9 on the reinforcement 6 buffers the impact on the frame to maintain the stability of the battery module inside the frame. Therefore, the utility model can realize the storage of large cylindrical batteries with large volume and capacity, and can meet the requirements of some vehicle models for battery system capacity and battery pack structural strength.

[0037] The beam includes a cross beam 2 and a longitudinal beam 3. The two ends of the cross beam 2 are respectively connected to two side panels 1 arranged opposite to each other, and the two ends of the longitudinal beam 3 are respectively connected to two other side panels 1 arranged opposite to each other. Reinforcement members 6 are provided between the end of the cross beam 2 and the side panels 1, and between the end of the longitudinal beam 3 and the side panels 1.

[0038] The cross beam 2 and the longitudinal beam 3 divide the interior of the frame 4 into a plurality of accommodating areas 5 for storing the battery modules 16; and each reinforcement member 6 has a connecting groove 7 and an expansion portion 8, the end of the beam (cross beam 2 and / or longitudinal beam 3) is connected to the connecting groove 7, and the expansion portion 8 is connected to the side panel 1.

[0039] A plurality of side panels 1 are connected end to end in sequence to form a frame 4, the two ends of the cross beam 2 are respectively connected to two oppositely arranged side panels 1, the two ends of the longitudinal beam 3 are respectively connected to another two oppositely arranged side panels 1, and the cross beam 2 and the longitudinal beam 3 divide the interior of the frame 4 into a plurality of accommodating areas 5 for storing battery modules 16, and the reinforcing members 6 have connecting grooves 7 and expansion portions 8, the ends of the cross beam 2 and / or the longitudinal beam 3 are connected to the connecting grooves 7, and the expansion portions 8 are connected to the side panels 1; the side panels 1, the cross beam 2 and the longitudinal beam 3 form a stable battery pack box frame that can store battery modules 16, and the reinforcing members 6 can further improve the stability of the frame, and increase the contact area between the cross beam 2 and / or the longitudinal beam 3 and the side panels 1, and buffer the frame when the vehicle collides sideways or head-on to maintain the stability of the battery modules 16 inside the frame. Therefore, the utility model can store large cylindrical batteries with large volume and large capacity, and can meet the requirements of some vehicle models for battery system capacity and battery pack structural strength.

[0040] Generally speaking, a single battery pack is placed in the accommodating area 5, and for battery packs of types such as large cylindrical cells, the energy of a single battery pack can reach 130 kWh.

[0041] The vehicle may be hit from the front or rear, which is a head-on collision, or the vehicle may be hit from the left or right, which is a side collision. In order to avoid damage to the battery pack inside the vehicle, affecting the power transmission of the battery pack, and to avoid potential safety hazards caused by damage to the battery pack, it is necessary to ensure that the battery pack can remain safe and still transmit power stably and safely when the vehicle is hit head-on or sideways. In this regard, in the present utility model, the cross beam 2 and the longitudinal beam 3 of the battery pack box are connected to the reinforcement 6, that is, both ends of the cross beam 2 and the longitudinal beam 3 are It is connected to the connecting groove 7 of the reinforcement 6. It should be noted here that the utility model includes multiple reinforcements 6, and both ends of the cross beam 2 and the longitudinal beam 3 are connected to the connecting grooves 7 of different reinforcements 6. The expansion parts 8 of these reinforcements 6 are connected to the side panels 1. The reinforcement 6 can increase the contact area between the cross beam 2 and the longitudinal beam 3 and the side panels 1. In this way, no matter the vehicle is hit head-on or sideways, the expansion part 8 of the reinforcement 6 can cushion the impact and avoid deformation of the side panels 1, the cross beam 2 and the longitudinal beam 3, thereby avoiding the battery module 16 inside the accommodating area 5 of the frame 4 from being hit.

[0042] The main reason why the battery pack inside the vehicle is deformed when the vehicle is hit head-on or sideways is that the frame and the battery pack box are unable to disperse the impact energy. The impact energy is concentrated on the battery pack, causing the battery module to deform and affecting the power transmission of the battery pack. What's worse, it poses a hidden danger to the safe use of the vehicle in the future.

[0043] Therefore, it is necessary to disperse the impact energy received by the vehicle when it is hit. In other words, when the impact energy is transmitted to the battery pack case 15 but does not contact the battery module 16, it is dispersed and cannot be concentrated on the battery module 16. In this way, the battery module 16 is not easily damaged.

[0044] In order to disperse the impact energy before the battery module 16 is affected by the impact energy, a buffer slope 9 is provided on the reinforcement 6. Specifically, a buffer slope 9 is provided on the expansion portion 8, and the buffer slope 9 is inclined from the side panel 1 to the connecting groove 7, that is, the buffer slope 9 is inclined from the side panel 1 to the beam.

[0045] The expansion portion 8 can increase the contact area between the cross beam 2 and / or the longitudinal beam 3 and the side panel 1. When the vehicle is hit, the energy of the impact can be transmitted to the side panel 1 of the battery pack box 15 via the frame. The area of ​​the side panel 1 is relatively large, and the energy of the impact is relatively dispersed. The energy of the impact is then transmitted from the side panel 1 to the reinforcement 6. On the path of the impact energy transmission, there is a buffer slope 9 on the expansion portion 8 of the reinforcement 6, so that the cross-sectional area of ​​the expansion portion 8 gradually decreases, and part of the impact energy will gradually dissipate during the transmission process, so as to avoid the impact energy being too strong at the beginning and affecting the cross beam 2 / longitudinal beam 3. Part of the impact energy will be transmitted to the cross beam 2 / longitudinal beam 3 via the reinforcement 6, but at this time this part of the energy will not cause the cross beam 2 / longitudinal beam 3 to deform, and thus will not affect the battery module 16 in the accommodating area 5 formed by the side panel 1, the cross beam 2 and the longitudinal beam 3, that is, the battery module 16 is safe.

[0046] If no buffer slope 9 is provided at the connection between the cross beam 2 / longitudinal beam 3 and the side panel 1, part of the impact energy cannot be gradually dissipated between the cross beam 2 / longitudinal beam 3 and the side panel 1, which may easily cause the impact energy to be concentrated on the cross beam 2 / longitudinal beam 3, causing the cross beam 2 / longitudinal beam 3 to deform. In this case, the impact energy may also threaten the battery module 16, causing it to deform, thereby affecting the power transmission and safe use of the entire vehicle.

[0047] Among all the impacts suffered by the vehicle, the ones that can cause deformation of the battery module 16 are generally large-area collisions, in which the vehicle body will be dented over a large area, and the battery pack box 15 will also receive a large area of ​​the impact energy.

[0048] In order to evenly dissipate the impact energy generated by a large-area collision, two buffer slopes 9 are arranged on the reinforcement 6 of the utility model, and they are two symmetrical buffer slopes 9. The two buffer slopes 9 are symmetrically arranged on both sides of the beam. Generally, the connecting groove 7 is connected to the middle of the expansion portion 8, and the buffer slopes 9 are arranged on both sides of the expansion portion 8. It can be understood that the two buffer slopes 9 are symmetrically distributed on the opposite sides of the connecting groove 7.

[0049] Under ideal circumstances, the two symmetrical buffer slopes 9 of the expansion portion 8 can synchronously and symmetrically dissipate the impact energy transmitted from the side panel 1, so that when the impact energy is transmitted to the cross beam 2 / longitudinal beam 3, the direction of the impact energy transmission is consistent with the axial direction of the cross beam 2 / longitudinal beam 3, and will not deviate from the axial direction of the cross beam 2 / longitudinal beam 3. In this way, the cross beam 2 / longitudinal beam 3 will not be easily deformed.

[0050] In fact, when a vehicle is hit head-on or sideways, the direction of the impact is not necessarily along the axial direction of the crossbeam 2 / longitudinal beam 3. Before the impact energy is transmitted to the crossbeam 2 / longitudinal beam 3, it is first transmitted through the two symmetrical buffer slopes 9 of the expansion portion 8 and dissipated quickly and synchronously. This can ensure that the transmission direction of the impact energy is not too biased relative to the axial direction of the crossbeam 2 / longitudinal beam 3. The crossbeam 2 / longitudinal beam 3 itself has a certain strength, which is sufficient to resist the impact energy and thus will not deform.

[0051] When the reinforcement 6 is subjected to the impact energy transmitted from the side panel 1, the impact energy will be transmitted inside the reinforcement 6, which requires the structural strength of the reinforcement 6. On this basis, in order to further dissipate the impact energy, the reinforcement 6 is allowed to deform to cushion the impact and avoid the connection between the reinforcement 6 and the side panel 1 being too rigid, which would cause damage to the reinforcement 6.

[0052] Some buffer holes can be provided on the reinforcement member 6 .

[0053] In some embodiments, a first buffer hole 10 is arranged inside the buffer slope 9 of the reinforcement 6, such as the interior of the buffer slope 9 is hollowed out to form the first buffer hole 10. The first buffer hole 10 may be a blind hole or a through hole, that is, the first buffer hole 10 may pass through the buffer slope 9, and the first buffer hole 10 extends in an axial direction perpendicular to the beam (cross beam 2 or longitudinal beam 3); in addition, the connecting groove 7 is connected to the outer side of the middle part of the expansion portion 8, and a second buffer hole 11 passing through the upper and lower surfaces of the expansion portion 8 is arranged in the middle part of the expansion portion 8, and the second buffer hole 11 extends in an axial direction perpendicular to the beam (cross beam 2 or longitudinal beam 3), or the second buffer hole 11 is a blind hole.

[0054] Due to the presence of the first buffer hole 10 and the second buffer hole 11, the reinforcement 6 can be deformed in accordance with the stress requirements when receiving the impact energy transmitted from the side panel 1, so as to buffer the impact and dissipate part of the impact energy. Moreover, the first buffer hole 10 and the second buffer hole 11 extend in an axial direction perpendicular to the cross beam 2 / longitudinal beam 3, so that the reinforcement 6 is easier to deform when impacted and easier to buffer the impact. In addition, the first buffer hole 10 and the second buffer hole 11 can improve the self-strength of the reinforcement 6, so that it can resist the impact energy without being easily damaged.

[0055] The cross beam 2, longitudinal beam 3 and reinforcement member 6 of the present invention all have requirements on structural strength, and metal materials can be selected to ensure strength. For example, the reinforcement member 6 can be made of aluminum alloy or steel.

[0056] The interior of the cross beam 2 and / or the longitudinal beam 3 is hollow, and a reinforcing rib plate 12 intersecting horizontally and vertically is arranged inside the cross beam 2 and / or the longitudinal beam 3 .

[0057] The reinforcing rib plate 12 can improve the structural strength of the cross beam 2 / longitudinal beam 3 , so that the cross beam 2 / longitudinal beam 3 receives the energy of the impact but will not be easily deformed, thereby ensuring the safety of the battery module 16 .

[0058] The energy of the impact is transmitted between the side panel 1, the reinforcement 6 and the cross beam 2 / longitudinal beam 3. There are requirements for the connections between the side panel 1, the reinforcement 6 and the cross beam 2 / longitudinal beam 3 to ensure that: after an impact, the side panel 1 and the reinforcement 6, as well as the reinforcement 6 and the cross beam 2 / longitudinal beam 3, are still firmly connected.

[0059] In this regard, in some embodiments, the reinforcement 6 is connected to the end of the beam by riveting, the reinforcement 6 is welded to the side panel 1, the connecting groove 7 is connected to the end of the cross beam 2 or the longitudinal beam 3 by riveting, and the expansion portion 8 is welded to the side panel 1.

[0060] In this way, a stable connection between the side panel 1 and the reinforcement 6 as well as between the reinforcement 6 and the cross member 2 / longitudinal member 3 is ensured.

[0061] The present invention can also use other existing connection methods to achieve the connection between the reinforcement 6 and the crossbeam 2 / longitudinal beam 3, and can ensure the stability of the connection. The detailed description of the connection method will not be expanded here.

[0062] The utility model can be used in some vehicle models that have high requirements on large battery system capacity and stable battery pack structure, such as placing large cylindrical battery cells with large volume and large capacity. However, the voltage inside the large cylindrical battery cells is relatively high, and the actual transmitted voltage of the large cylindrical battery cells is high, which can ensure sufficient power for the vehicle.

[0063] The battery packs of these models have a large number of high-voltage connectors, and the corresponding battery packs have many internal high-voltage bus bars with a larger cross-sectional area, so the space for placing the corresponding battery packs is relatively small.

[0064] In this regard, the battery pack body 15 also includes a plurality of high-voltage bus bars 13 , which are stacked on the longitudinal beam 3 , and are reinforced and connected by a plurality of quick-release structures 14 . The high-voltage bus bars 13 are configured to be electrically connected to the battery module 16 .

[0065] The plurality of high-voltage bus bars 13 can stably transmit the power of the battery module 16 such as a large cylindrical battery cell for all power supply during vehicle use, that is, can transmit all the power of the battery module 16 to ensure sufficient power for the vehicle.

[0066] The utility model stacks these high-voltage bus bars 13 to save space inside the battery pack box 15 and prevent the cross beam 2 / longitudinal beam 3 inside the box from contacting the high-voltage bus bars 13 after the vehicle is hit, thereby affecting the output power of the battery module 16.

[0067] The quick-release structure 14 for connecting a plurality of high-voltage busbars 13 of the present invention can be a common structure in the prior art, and will not be described in detail here.

[0068] In some embodiments, multiple side panels 1 of the utility model are connected end to end in sequence to form a square frame 4, and one of the side panels 1 is configured as an anti-collision beam at the vehicle mounting point; the cross beam 2 is perpendicular to the side panel 1 connected thereto, and the longitudinal beam 3 is perpendicular to the side panel 1 connected thereto.

[0069] Specifically, the battery pack body 15 includes two cross beams 2, which are arranged side by side, and the longitudinal beam 3 is perpendicular to the cross beam 2, and the longitudinal beam 3 passes through the middle of the cross beam 2; the cross beam 2 and the longitudinal beam 3 of the utility model are hollow inside and are both provided with reinforcing ribs 12. The cross-sections of the cross beam 2 and the longitudinal beam 3 are relatively wide. In order to facilitate the arrangement of the cross beam 2 and the longitudinal beam 3, a groove can be provided in the middle of the cross beam 2 for the longitudinal beam 3 to pass through.

[0070] A plurality of side panels 1 enclose a square frame 4, which means that the cross beam 2 is oriented in the left-right direction of the vehicle, and the longitudinal beam 3 is oriented in the front-back direction of the vehicle. When the vehicle is hit in the left-right direction or the front-back direction, the impact energy is transferred to the reinforcement 6 through the side panel 1, and the reinforcement 6 transfers the impact energy to the cross beam 2 / longitudinal beam 3. The transfer direction of the impact energy is basically not too biased towards the axial direction of the cross beam 2 / longitudinal beam 3, and the cross beam 2 / longitudinal beam 3 has its own strength to resist the energy transferred thereto, and will not be easily deformed.

[0071] The second aspect of the embodiment of the utility model further proposes a battery pack, including a battery pack box 15 as in the first aspect and a plurality of battery modules 16 , wherein the battery modules 16 are arranged in a receiving area 5 formed by the side panel 1 , the cross beam 2 and the longitudinal beam 3 .

[0072] This battery pack can meet the vehicle's requirements for battery system capacity and battery pack structural strength.

[0073] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A battery pack box, It is characterized in that include: A plurality of side panels, wherein the plurality of side panels are connected end to end in sequence to enclose a frame; at least one beam, two ends of which are respectively connected to the two side panels arranged opposite to each other, and the beam divides the interior of the frame into at least two accommodating areas for storing battery modules; as well as The reinforcement is connected to the beam and the side panel, and the reinforcement is provided with a buffer slope, and the buffer slope is inclined in a direction from the side panel to the beam.

2. The battery pack case according to claim 1, It is characterized in that The reinforcement member is provided with two buffer slopes, and the two buffer slopes are symmetrically arranged on both sides of the beam.

3. The battery pack case according to claim 2, It is characterized in that A first buffer hole is arranged inside the buffer slope.

4. The battery pack case according to claim 3, It is characterized in that The first buffer hole penetrates the buffer slope, and the first buffer hole extends in a direction perpendicular to an axial direction of the beam.

5. The battery pack case according to claim 2, It is characterized in that The reinforcement member has a connecting groove and an expansion portion, the connecting groove is connected to the outer side of the middle portion of the expansion portion, the beam is connected to the connecting groove, and the expansion portion is connected to the side panel.

6. The battery pack case according to claim 5, It is characterized in that A second buffer hole is arranged in the middle of the expansion portion and passes through the upper and lower surfaces thereof, and the second buffer hole extends in a direction perpendicular to the axial direction of the beam.

7. The battery pack case according to claim 1, It is characterized in that The beam includes a cross beam and a longitudinal beam, the two ends of the cross beam are respectively connected to the two side panels arranged opposite to each other, the two ends of the longitudinal beam are respectively connected to the other two side panels arranged opposite to each other, and the reinforcing members are provided between the end of the cross beam and the side panels, and between the end of the longitudinal beam and the side panels.

8. The battery pack case according to claim 7, It is characterized in that The interior of the cross beam and / or the longitudinal beam is hollow, and the interior of the cross beam and / or the longitudinal beam is provided with reinforcing rib plates intersecting horizontally and vertically.

9. The battery pack case according to claim 7, It is characterized in that A plurality of the side panels are connected end to end in sequence to enclose a square frame, and one of the side panels is configured as an anti-collision beam at the vehicle mounting point; The cross beam is perpendicular to the side panel connected thereto, and the longitudinal beam is perpendicular to the side panel connected thereto.

10. The battery pack case according to claim 9, It is characterized in that The battery pack box includes two cross beams, which are arranged side by side. The longitudinal beam is perpendicular to the cross beams, and the longitudinal beam passes through the middle of the cross beams.

11. The battery pack case according to claim 1, It is characterized in that The reinforcing member is connected to the end of the beam by riveting, and the reinforcing member is welded to the side panel.

12. The battery pack case according to claim 1, It is characterized in that The battery pack case also includes a plurality of high-voltage busbars, which are stacked on the beams and are reinforced and connected by a plurality of quick-release structures. The high-voltage busbars are configured to be electrically connected to the battery module.

13. A battery pack, It is characterized in that Comprising a battery pack box as claimed in any one of claims 1 to 12 and a plurality of battery modules; The battery module is arranged in the accommodating area formed by the side panel and the beam structure.

Images