Battery pack box body and battery pack

Abstract

The utility model provides a battery pack box body and a battery pack, and relates to the technical field of batteries. A placement cavity and two openings communicated with the placement cavity are defined by the frame main body, and the bottom plate is arranged on one opening; the frame body comprises a front frame, the front frame comprises a first plate and a second plate, the first plate and the second plate are located on the side, back to the containing cavity, of the front frame, and one end of the first plate is connected with the bottom plate. An included angle is formed between the first plate and the plane where the bottom plate is located, so that the first plate inclines towards the outside of the placement cavity; the bottom plate is provided with a central axis extending in the width direction, the central axis divides the face, away from the containing cavity, of the bottom plate into a first area and a second area, the first area is close to the front frame, the second area is connected with the first area, and the protection plate at least partially covers the second area. The battery pack box can solve the problems that the risk of cracking or damage of the front frame is large, the risk of damage of the bottom plate is large, and the operation safety of a new energy vehicle is affected.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a battery pack housing and a battery pack. Background Art

[0002] With the wide application of new energy vehicles, the operation safety of new energy vehicles has received more and more attention. According to the statistical data of in-depth research on traffic accidents in China, in the cases of fire accidents caused by collisions of new energy vehicles, the proportion of fire accidents caused by bottom bumps is about 70%. And in the accident cases caused by bottom bumps, the cases of hitting low obstacles, scraping the bottom road surface and lifting obstacles account for 80%. Therefore, reducing the impact of bottom bumps of new energy vehicles on the battery pack is very important for the operation safety of new energy vehicles.

[0003] In existing new energy vehicles, generally a battery pack anti-collision beam or anti-collision bar is provided at the front end of the battery pack placement area of the chassis frame. However, after setting the anti-collision beam or anti-collision bar, there is still a risk of obstacles hitting the battery pack, which makes the risk of cracking or damage of the front frame relatively large, and the risk of damage to the bottom plate of the battery pack relatively large, thus affecting the operation safety of new energy vehicles. Summary of the Utility Model

[0004] In view of this, the present application provides a battery pack housing and a battery pack to solve the problem that after setting the anti-collision beam or anti-collision bar, there is still a risk of obstacles hitting the battery pack, which makes the risk of cracking or damage of the front frame relatively large, and the risk of damage to the bottom plate of the battery pack relatively large, thus affecting the operation safety of new energy vehicles.

[0005] According to one aspect of the present application, a battery pack housing is provided. The battery pack housing includes a frame body, a bottom plate and a protection plate. The frame body defines an accommodation cavity and two openings communicating with the accommodation cavity. The bottom plate is disposed on one of the openings;

[0006] The frame body includes a front frame. The front frame includes a first plate member and a second plate member. The first plate member and the second plate member are located on the side of the front frame facing away from the accommodation cavity. One end of the first plate member is connected to the bottom plate; the other end is connected to the second plate member. The first plate member is disposed at an angle with the plane where the bottom plate is located, so that the first plate member inclines towards the outside of the accommodation cavity;

[0007] The bottom plate has a central axis extending in the width direction. The central axis divides the side of the bottom plate facing away from the accommodation cavity into a first area and a second area. The first area is close to the front frame, and the second area is connected to the first area. The protection plate at least partially covers the second area.

[0008] Preferably, the first plate member includes a plurality of first plate portions, the second plate member includes a plurality of second plate portions, the plurality of first plate portions are connected to the plurality of second plate portions in one-to-one correspondence, and one end of the first plate portion connected to the bottom plate is inclined toward the placement cavity;

[0009] The plurality of first plate portions are connected in sequence, and the extending directions of at least two adjacent first plate portions intersect.

[0010] Preferably, the included angle between any one of the plurality of first plate portions and the plane where the bottom plate is located is less than or equal to 45 degrees.

[0011] Preferably, the two openings are respectively located on both sides of the frame body in the thickness direction of the battery pack box body, and the front frame is located on one side of the frame body in the length direction of the battery pack box body;

[0012] The first plate member includes a first middle plate portion, the first middle plate portion is one of the plurality of first plate portions, and the extending direction of the first middle plate portion is perpendicular to the length direction, and the extending direction of the first middle plate portion intersects with the extending directions of the adjacent first plate portions.

[0013] Preferably, the dimension of any one of the first plate portions in the length direction is greater than or equal to 30 mm, and the dimension of any one of the first plate portions in the thickness direction is greater than or equal to 30 mm.

[0014] Preferably, the thickness of the first plate member is 1.2 times to 2 times the thickness of the second plate member.

[0015] Preferably, the front frame further includes a third plate member, and the first plate member is connected to the bottom plate through the third plate member.

[0016] Preferably, the battery pack box body further includes a protection plate, and the protection plate is attached to the side of the bottom plate facing away from the placement cavity.

[0017] Preferably, the thickness of the protection plate is less than the thickness of the bottom plate.

[0018] According to another aspect of the present application, a battery pack is provided, and the battery pack includes the above-mentioned battery pack box body.

[0019] In the battery pack case of the present application, the front frame includes a first plate and a second plate. The first plate and the second plate are located on the side of the front frame facing away from the placement cavity. One end of the first plate is connected to the bottom plate, and the other end of the first plate is connected to the second plate. The first plate and the plane where the bottom plate are located are arranged at an angle so that the first plate is inclined toward the outside of the placement cavity. When the battery pack is hit, the obstacle hits the first plate. Since the first plate is arranged at an angle, the first plate can transfer the impact force to the bottom plate, and the impact force on the front frame is reduced, reducing the risk of cracking or damage to the front frame. After the first plate collides with the obstacle, as the vehicle moves, the obstacle will hit the rear section of the battery pack case. The protective plate covers the second area of ​​the rear section of the bottom plate, which can ensure that the obstacle will not hit the bottom plate, reducing the risk of damage to the bottom plate. In this way, the operating safety of new energy vehicles is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram showing the three-dimensional structure of a battery pack box according to an embodiment of the utility model;

[0022] Figure 2 A schematic diagram showing the planar structure of a battery pack box according to an embodiment of the utility model;

[0023] Figure 3 Show Figure 2 A cross-sectional view of the battery pack case obtained by cutting along A-A';

[0024] Figure 4 Show Figure 3 A magnified view of part B;

[0025] Figure 5 A schematic diagram showing the three-dimensional structure of the front frame;

[0026] Figure 6 A schematic diagram showing the planar structure of the front frame;

[0027] Figure 7 Show Figure 6 The cross-sectional view of the front frame obtained by cutting along C-C'.

[0028] Icon: 1 - front frame; 11 - first plate member; 111 - first plate portion; 12 - second plate member; 121 - second plate portion; 13 - third plate member; 131 - third plate portion; 14 - fourth plate member; 15 - fifth plate member; 2 - rear frame; 3 - side frame; 4 - bottom plate; 5 - protective plate; 6 - first support beam; 7 - second support beam; L1 - length direction; L2 - width direction; L3 - thickness direction. Detailed implementation mode

[0029] The following detailed implementation modes are provided to assist the reader in obtaining a comprehensive understanding of the methods, devices, and / or systems described herein. However, after understanding the disclosure of this application, various changes, modifications, and equivalents of the methods, devices, and / or systems described herein will be obvious. For example, the order of operations described herein is merely an example and is not limited to the order set forth herein. Rather, changes that will be obvious after understanding the disclosure of this application may be made, except for operations that must occur in a specific order. In addition, descriptions of features known in the art may be omitted for the sake of clarity and conciseness.

[0030] The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein are provided only to illustrate some of the many possible ways of implementing the methods, devices, and / or systems described herein that will be obvious after understanding the disclosure of this application.

[0031] Throughout the specification, when an element (such as a layer, region, or substrate) is described as "on" another element, "connected to" another element, "bonded to" another element, "above" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "above" another element, or "covering" another element, or there may be one or more other elements between them. In contrast, when an element is described as "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly above" another element, or "directly covering" another element, there may be no other elements between them.

[0032] As used herein, the term "and / or" includes any one of the listed related items and any combination of any two or more of them.

[0033] Although terms such as "first", "second", and "third" may be used herein to describe various components, elements, regions, layers, or sections, these components, elements, regions, layers, or sections are not limited by these terms. Rather, these terms are only used to distinguish one component, element, region, layer, or section from another. Thus, a first component, element, region, layer, or section as referred to in the examples described herein may also be termed a second component, element, region, layer, or section without departing from the teachings of the examples.

[0034] For ease of description, spatial relationship terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another as shown in the figures. Such spatial relationship terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, an element described as "above" or "upper" relative to another element will then be "below" or "lower" relative to the other element. Thus, the term "above" includes both the orientation of "above" and "below" depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or at other orientations), and the spatial relationship terms used herein will be interpreted accordingly.

[0035] The terms used herein are for the purpose of describing various examples only and are not intended to limit the disclosure. Unless the context clearly dictates otherwise, the singular forms are also intended to include the plural forms. The terms "comprises", "comprising", and "having" list the stated features, quantities, operations, components, elements, and / or combinations thereof that exist, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0036] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the figures may occur. Thus, the examples described herein are not limited to the specific shapes shown in the figures but include changes in shape that occur during manufacturing.

[0037] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. Additionally, although the examples described herein have a variety of configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0038] According to one aspect of the present application, a battery pack housing is provided, as Figures 1 to 7As shown, the battery pack housing includes a frame body and a bottom plate 4. The frame body defines an accommodation cavity and two openings communicating with the accommodation cavity. The bottom plate 4 is disposed on one of the openings, and the accommodation cavity is used to place battery cells. The frame body includes a front frame 1, and the front frame 1 includes a first plate member 11 and a second plate member 12. The first plate member 11 and the second plate member 12 are located on the side of the front frame 1 facing away from the accommodation cavity. One end of the first plate member 11 is connected to the bottom plate 4, and the other end of the first plate member 11 is connected to the second plate member 12. The first plate member 11 is disposed at an angle with the plane of the bottom plate 4, so that the first plate member 11 inclines towards the outside of the accommodation cavity. When the battery pack including the battery pack housing of the present application is impacted, an obstacle impacts the first plate member 11. Since the first plate member 11 is inclined, the first plate member 11 can transfer the received impact force to the bottom plate 4, reducing the impact force received by the front frame 1, reducing the risk of cracking or damage of the front frame 1, and improving the operation safety of new energy vehicles.

[0039] As Figure 1 , Figure 2 and Figure 3 shown, the frame body further includes a rear frame 2 and two side frames 3. The extending directions of the two side frames 3 are parallel to the length direction L1, and the two side frames 3 are arranged at intervals along the width direction L2. The two ends of any one side frame 3 are respectively connected to the front frame 1 and the rear frame 2. The front frame 1, the rear frame 2 and the two side frames 3 define an accommodation cavity and two openings. The two openings are respectively located on both sides of the frame body in the thickness direction L3 of the battery pack housing. The front frame 1 and the rear frame 2 are respectively located on both sides of the frame body in the length direction L1 of the battery pack housing. The edges of the bottom plate 4 are respectively connected to the front frame 1, the rear frame 2 and the two side frames 3, thereby closing one of the openings.

[0040] As Figure 2 shown, the battery pack housing further includes a plurality of first support beams 6 and a plurality of second support beams 7. The two ends of any one first support beam 6 are respectively connected to the two side frames 3. The plurality of first support beams 6 are arranged at intervals along the length direction L1. One of the first support beams 6 located at the edge is connected to the front frame 1 through a second support beam 7, and the other first support beam 6 located at the edge is connected to the rear frame 2 through a second support beam 7.

[0041] Optionally, the number of the first support beams 6 can be three, and two second support beams 7 are correspondingly provided for the first support beam 6 located at the edge.

[0042] As Figure 5 and Figure 6As shown, the first plate member 11 includes a plurality of first plate portions 111, the second plate member 12 includes a plurality of second plate portions 121, the plurality of first plate portions 111 are connected to the plurality of second plate portions 121 in a one-to-one correspondence. One end of the first plate portion 111 connected to the bottom plate 4 is inclined towards the placement cavity, and the upper end of the first plate portion 111 is inclined towards the outside of the placement cavity relative to the lower end of the first plate portion 111. When the first plate portion 111 is impacted, the first plate portion 111 can transfer the received impact force to the bottom plate 4, thereby reducing the risk of cracking or damage to the front frame 1.

[0043] Furthermore, the plurality of first plate portions 111 are connected in sequence, and the extending directions of at least two adjacent first plate portions 111 intersect. That is to say, two adjacent first plate portions 111 face different directions. The orthographic projection of the plurality of first plate portions 111 on a plane perpendicular to the thickness direction L3 of the battery pack box body is arranged in a zigzag shape. In this way, different first plate portions 111 can collide with obstacles in different directions to transfer the impact force they receive to the bottom plate 4, so as to reduce the risk of cracking or damage to the front frame 1 caused by impacts from obstacles in different directions.

[0044] In addition, one of the plurality of first plate portions 111 is a first middle plate portion. The extending direction of the first middle plate portion is perpendicular to the length direction L1, and the extending direction of the first middle plate portion intersects with the extending directions of the adjacent first plate portions 111. In this way, the first middle plate portion and the first plate portions 111 on both sides of the first middle plate portion can respectively collide with obstacles from different directions, so as to reduce the risk of cracking or damage to the front frame 1.

[0045] Optionally, the number of the first plate portions 111 can be selected according to requirements. For example, the number of the first plate portions 111 can be three, four, five or more. Taking the number of the first plate portions 111 being three as an example, the middle one of the three first plate portions 111 is the first middle plate portion. The first end of the first plate portion 111 at the edge is connected to the first middle plate portion, and the second end of the first plate portion 111 at the edge is connected to the side frame 3 relative to the first middle plate portion. The second end of the first plate portion 111 at the edge is inclined towards the side where the rear frame 2 is located, and the two first plate portions 111 at the edge can be symmetrically arranged. In this way, the three first plate portions 111 can respectively collide with obstacles from directly in front and from both sides to transfer the received impact force to the bottom plate 4, thereby reducing the risk of cracking or damage to the front frame 1.

[0046] In the embodiment of the present application, the included angle between any one of the plurality of first plate portions 111 and the plane where the bottom plate 4 is located is less than or equal to 45 degrees, which is convenient for the first plate portion 111 to transfer the received impact force to the bottom plate 4.

[0047] Furthermore, the angles between the multiple first plate portions 111 and the plane where the bottom plate 4 is located can be the same or different. Preferably, the angles between the multiple first plate portions 111 and the bottom plate 4 are the same. The angle a between the first plate portion 111 and the plane where the bottom plate 4 is located can be 45 degrees, 40 degrees, 38 degrees, 35 degrees, 30 degrees, etc.

[0048] Preferably, the dimension of any first plate portion 111 in the length direction L1 is greater than or equal to 30 mm, and the dimension of any first plate portion 111 in the thickness direction L3 is greater than or equal to 30 mm, so that the battery pack box can meet the standards of vehicle collision.

[0049] In the embodiments of the present application, as Figure 6 and Figure 7 shown, the front frame 1 further includes a third plate member 13. The first plate member 11 is connected to the bottom plate 4 through the third plate member 13. The third plate member 13 may include multiple third plate portions 131. The number of the third plate portions 131 is the same as the number of the first plate portions 111. The multiple third plate portions 131 and the multiple first plate portions 111 correspond one by one. The first plate portion 111 is connected to the corresponding third plate portion 131. The third plate portion 131 and the bottom plate 4 are connected by bolts, so as to realize the fixation between the front frame 1 and the bottom plate 4.

[0050] Furthermore, the thickness of the first plate member 11 is 1.2 times to 2 times the thickness of the second plate member 12. In this way, the first plate member 11 is thickened to avoid damage when the first plate member 11 collides with an obstacle. Optionally, the thickness of the second plate member 12 can be 2 mm.

[0051] In addition, as Figure 4 shown, the front frame 1 further includes a fourth plate member 14 and a fifth plate member 15 that are connected to each other. The fourth plate member 14 is connected to the second plate member 12, and the fifth plate member 15 is connected to the third plate member 13. Optionally, the front frame 1 can be a profile with a support structure inside, and the first plate member 11, the second plate member 12, the third plate member 13, the fourth plate member 14, and the fifth plate member 15 are respectively different parts of the external structure of the profile.

[0052] In the embodiments of the present application, as Figure 1 shown, the battery pack box further includes a protection plate 5. The protection plate 5 is attached to the side of the bottom plate 4 facing away from the placement cavity. In this way, when the first plate member 11 collides with an obstacle, the first plate member 11 can transmit the impact force received to the bottom plate 4. As the vehicle moves, the obstacle will impact the protection plate 5, and the impact energy is absorbed by the protection plate 5, thereby reducing the collision force of the obstacle on the bottom plate 4, reducing the collision force on the battery cells arranged inside the battery pack box, and avoiding accidents such as leakage, smoking, fire, and explosion caused by the battery cells being deformed beyond the safety boundary due to force.

[0053] Furthermore, the bottom plate 4 has a central axis extending along the width direction L2. The central axis divides the side of the bottom plate 4 facing away from the installation cavity into a first region and a second region. The first region is close to the front frame 1, and the second region is connected to the first region. The protection plate 5 at least partially covers the second region. After the first plate member 11 collides with an obstacle, as the vehicle moves, the obstacle will hit the rear section of the battery pack housing. The protection plate 5 covers the second region of the rear section of the bottom plate 4, which can ensure that the obstacle does not hit the bottom plate 4. Optionally, the protection plate 5 can only cover the second region, or the protection plate 5 can partially cover the second region, and the other part covers part or all of the first region.

[0054] Optionally, the protection plate 5 can be a metal plate or a non-metal plate. The anti-slip plate can be a solid plate, a multi-layer plate or a profile. The thickness of the protection plate 5 is less than or equal to the thickness of the bottom plate 4.

[0055] When the battery pack including the battery pack housing of the present application is installed on a vehicle provided with a bumper bar or a bumper beam, when the vehicle hits a low obstacle at a certain speed, it will first hit the bumper bar or the bumper beam. The bumper bar is lower than the lowest point of the battery pack. As the vehicle moves, there will be a period of suspension of the vehicle and the battery pack relative to the obstacle. Then the obstacle will hit the protection plate 5, and the impact energy is absorbed by the protection plate 5, reducing the collision force of the obstacle on the bottom plate 4. In this way, the collision force on the battery cells inside the battery pack housing is reduced, avoiding accidents such as leakage, smoking, fire and explosion caused by the battery cells being deformed beyond the safety boundary due to the force.

[0056] When the battery pack including the battery pack housing of the present application is installed on a vehicle not provided with a bumper bar or a bumper beam, when the vehicle hits a low obstacle at a certain speed, it will first hit the first plate member 11 of the front frame 1 of the battery pack. Since the first plate member 11 is inclined, the first plate member 11 can transmit the received impact force to the bottom plate 4. As the vehicle moves, the obstacle will move and hit the protection plate 5, and the impact force is absorbed by the protection plate 5. In this way, the risk of deformation or cracking of the front frame 1 caused by the impact is reduced, and at the same time, the impact of secondary impact on the battery cells is avoided, improving the safety and reliability of the battery pack.

[0057] According to another aspect of the present application, a battery pack is provided. The battery pack includes the above-mentioned battery pack housing, and the battery pack has the same technical effects as the above-mentioned battery pack housing, which will not be elaborated here.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery pack box, characterized in that: The battery pack box comprises a frame body, a bottom plate (4) and a protective plate (5); the frame body is provided with a placement cavity and two openings communicating with the placement cavity; the bottom plate (4) is arranged on one of the openings; The frame body comprises a front frame (1), the front frame (1) comprises a first plate (11) and a second plate (12), the first plate (11) and the second plate (12) are located on a side of the front frame (1) facing away from the placement cavity, one end of the first plate (11) is connected to the bottom plate (4), and the other end is connected to the second plate (12), the first plate (11) and the bottom plate (4) are arranged at an angle with respect to the plane where the first plate (11) is located, so that the first plate (11) is inclined toward the outside of the placement cavity; The bottom plate (4) has a central axis extending along the width direction (L2), and the central axis divides the bottom plate (4) into a first area and a second area on a side facing away from the placement cavity, the first area being close to the front frame (1), the second area being connected to the first area, and the protective plate (5) at least partially covering the second area.

2. The battery pack case according to claim 1, characterized in that: The first plate member (11) comprises a plurality of first plate portions (111), the second plate member (12) comprises a plurality of second plate portions (121), the plurality of first plate portions (111) are connected to the plurality of second plate portions (121) in a one-to-one correspondence, and one end of the first plate portion (111) connected to the bottom plate (4) is inclined toward the placement cavity; The plurality of first plate portions (111) are connected in sequence, and the extension directions of at least two adjacent first plate portions (111) intersect.

3. The battery pack case according to claim 2, characterized in that: The angle between any one of the plurality of first plate portions (111) and the plane where the bottom plate (4) is located is less than or equal to 45 degrees.

4. The battery pack case according to claim 2, characterized in that: The two openings are respectively located on two sides of the frame body in the thickness direction (L3) of the battery pack box, and the front frame (1) is located on one side of the frame body in the length direction (L1) of the battery pack box; The first plate member (11) comprises a first middle plate portion, the first middle plate portion is one of a plurality of first plate portions (111), and an extension direction of the first middle plate portion is perpendicular to the length direction (L1), and the extension direction of the first middle plate portion intersects with an extension direction of an adjacent first plate portion (111).

5. The battery pack case according to claim 4, characterized in that: The dimension of any of the first plate portions (111) in the length direction (L1) is greater than or equal to 30 mm, and the dimension of any of the first plate portions (111) in the thickness direction (L3) is greater than or equal to 30 mm.

6. The battery pack case according to claim 1, characterized in that: The thickness of the first plate (11) is 1.2 to 2 times the thickness of the second plate (12).

7. The battery pack case according to claim 2, characterized in that: The front frame (1) further comprises a third plate member (13), and the first plate member (11) is connected to the bottom plate (4) via the third plate member (13).

8. The battery pack case according to claim 7, characterized in that: The third plate component (13) comprises a plurality of third plate portions (131), the plurality of third plate portions (131) corresponding one to one with the plurality of first plate portions (111), the first plate portion (111) being connected to the corresponding third plate portion (131), and any third plate portion (131) being connected to the bottom plate (4).

9. The battery pack case according to claim 1, characterized in that: The thickness of the protective plate (5) is smaller than the thickness of the bottom plate (4).

10. A battery pack for installation on a vehicle, characterized in that: The battery pack comprises a battery pack case according to any one of claims 1 to 9; wherein the front frame (1) is located on a side of the placement cavity close to the vehicle's forward direction.

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