Battery box and battery pack

Abstract

The utility model relates to the technical field of batteries, and provides a battery box and a battery pack. The battery box comprises a box body. The box body is provided with a bottom plate. The bottom plate comprises a first plate body and a first energy absorption part arranged on the first plate body in a protruding mode, and the first energy absorption part is configured to absorb and / or transfer external acting force borne by the bottom of the box body. And / or a protection plate is arranged in the box body, the protection plate is connected with the bottom plate, the protection plate comprises a second plate body and a second energy absorption part arranged on the second plate body in a protruding mode, and the second energy absorption part is configured to absorb and / or transfer the external acting force borne by the bottom of the box body. Therefore, the anti-collision capacity of the bottom of the box body can be improved, and damage to the bottom of the box body due to collision is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, concretely relates to a battery box and battery package. BACKGROUND

[0002] In the related art, the battery box is usually installed on the chassis of the vehicle. When the road surface has obstacles or stones and other sundries impact the vehicle chassis, the battery box bottom plate may be damaged by the impact of external forces. Currently, profile schemes or sheet metal schemes are usually used to improve the anti-collision capability of the battery box. In the profile scheme, the bottom of the battery box is usually integrated with a liquid cooling plate and a bottom guard plate, which protects the battery box with the bottom guard plate to reduce the risk of bumping on the bottom of the battery box. However, the scheme of the liquid cooling plate combined with the bottom guard plate will cause a high design cost of the battery package. In the sheet metal scheme, horizontal and vertical beams are usually arranged inside the battery box to improve the overall package stiffness. However, the horizontal and vertical beams will greatly occupy the internal height space of the battery box, resulting in low space utilization of the overall package and greatly reducing the energy density of the battery package. SUMMARY

[0003] The embodiments of the utility model provide a battery box and a battery package, which can improve the anti-collision capability of the bottom of the box body and reduce the damage to the bottom of the box body caused by bumping, at least partially solving the above technical problems.

[0004] In a first aspect, the embodiments of the utility model provide a battery box and a battery package, comprising:

[0005] a box body having a bottom plate;

[0006] The bottom plate comprises a first plate body and a first energy absorption portion protruding from the first plate body, and the first energy absorption portion is configured to absorb and / or transmit external forces acting on the bottom of the box body; and / or a protection plate is arranged in the box body, the protection plate is connected with the bottom plate, and the protection plate comprises a second plate body and a second energy absorption portion protruding from the second plate body, and the second energy absorption portion is configured to absorb and / or transmit external forces acting on the bottom of the box body.

[0007] In an embodiment, the first energy absorption portion comprises a first energy absorption section, a first connecting section and a second energy absorption section, the first connecting section is arranged spaced apart from the first plate body, and the opposite ends of the first connecting section are connected with the first end of the first energy absorption section and the first end of the second energy absorption section, respectively, and the second ends of the first energy absorption section and the second energy absorption section are connected with the first plate body.

[0008] In an embodiment, the first energy absorption section and the second energy absorption section are inclined in a direction away from the axis of the first connecting section.

[0009] In an embodiment, the first energy-absorbing section has an inclination angle A1, and the second energy-absorbing section has an inclination angle A2, and the following conditions are met: 100°≤A1≤140°, and 100°≤A2≤140°.

[0010] In an embodiment, the second energy-absorbing part includes a third energy-absorbing section, a second connecting section, and a fourth energy-absorbing section, the second connecting section is arranged spaced apart from the second plate body, opposite ends of the second connecting section are connected to a first end of the third energy-absorbing section and a first end of the fourth energy-absorbing section respectively, and a second end of the third energy-absorbing section and a second end of the fourth energy-absorbing section are both connected to the second plate body.

[0011] In an embodiment, the third energy-absorbing section and the fourth energy-absorbing section are both inclined in a direction away from an axis of the second connecting section.

[0012] In an embodiment, the third energy-absorbing section has an inclination angle A3, and the fourth energy-absorbing section has an inclination angle A4, and the following conditions are met: 100°≤A3≤140°, and 100°≤A4≤140°.

[0013] In an embodiment, the first plate body and the second plate body are arranged spaced apart, the first energy-absorbing part is convexly arranged in a direction of the second plate body, the second energy-absorbing part is convexly arranged in a direction of the first plate body, and the first energy-absorbing part and the second energy-absorbing part abut.

[0014] In an embodiment, at least two first energy-absorbing parts are arranged spaced apart on the first plate body, and at least two second energy-absorbing parts are arranged spaced apart on the second plate body, one first energy-absorbing part abuts one second energy-absorbing part, and adjacent two first energy-absorbing parts and adjacent two second energy-absorbing parts enclose an energy-absorbing cavity between the first plate body and the second plate body.

[0015] In an embodiment, a heat preservation layer is arranged in the energy-absorbing cavity.

[0016] In an embodiment, a protective layer is arranged on a side of the bottom plate away from the protective plate.

[0017] In a second aspect, an embodiment of the utility model provides a battery pack, which comprises the battery box as described above.

[0018] The embodiment of the utility model has the following beneficial effects:

[0019] In the embodiment of the utility model, through make the bottom plate have first energy absorbing part, thereby utilize first energy absorbing part absorption and / or transmission the external force that box bottom received, and / or, through setting the fender in the box, make fender have second energy absorbing part, thereby utilize second energy absorbing part absorption and / or transmission the external force that box bottom received. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the drawings needed to be used in the embodiment description will be briefly introduced, obviously, the drawings in the following description are only some embodiments of the utility model, and for the person skilled in the art, other drawings can be obtained according to these drawings without creating creative labor.

[0021] Figure 1 It is the perspective view of the battery box provided by the embodiment of the utility model;

[0022] Figure 2 It is the section view of the battery box provided by the embodiment of the utility model;

[0023] Figure 3 It is Figure 2 One of the enlarged schematic view of B part in

[0024] Figure 4 It is Figure 2 Second enlarged schematic view of B part in

[0025] Reference signs:

[0026] 10-box, 20-bottom plate, 210-first energy absorbing part, 2110-first energy absorbing section, 2120-first connecting section, 2130-second energy absorbing section, 220-first plate body, 30-fender, 310-second energy absorbing part, 3110-third energy absorbing section, 3120-second connecting section, 3130-fourth energy absorbing section, 320-second plate body, 40-axis, 50-energy absorbing cavity, 60-protection layer. DETAILED DESCRIPTION

[0027] With reference to the drawings and in light of the description that follows, embodiments of the present application will be described and explained. It should be understood, however, that the embodiments described and explained are only some embodiments of the present application and are not all-inclusive of every embodiment of the present application. Based on the embodiments of the present application, all other embodiments that can be derived by those of ordinary skill in the art without creative thought, but not creative labor, shall fall within the scope of the present application. In addition, it should be understood that the specific implementation described herein is only used to illustrate and explain the present application and is not used to limit the present application. In the present application, unless stated to the contrary, the terms "upper" and "lower" generally refer to the upper and lower positions of the device in the actual use or working state, and specifically refer to the orientation of the drawing sheet in the drawing; and the terms "inner" and "outer" refer to the profile of the device.

[0028] As shown in Figures 1 to 4 The battery box provided by the embodiments of the present application includes a box body 10. The box body 10 has a bottom plate 20. The bottom plate 20 includes a first plate body 220 and a first energy absorbing portion 210 protruding from the first plate body 220, and the first energy absorbing portion 210 is configured to absorb and / or transmit external forces acting on the bottom of the box body 10. In addition, the box body 10 is provided with a protective plate 30, the protective plate 30 is connected with the bottom plate 20, and the protective plate 30 includes a second plate body 320 and a second energy absorbing portion 310 protruding from the second plate body 320, and the second energy absorbing portion 310 is configured to absorb and / or transmit external forces acting on the bottom of the box body 10.

[0029] In the embodiments of the present application, the bottom plate 20 has the first energy absorbing portion 210, so that the first energy absorbing portion 210 absorbs and / or transmits the external forces acting on the bottom of the box body 10, and / or the protective plate 30 is provided in the box body 10, so that the protective plate 30 has the second energy absorbing portion 310, so that the second energy absorbing portion 310 absorbs and / or transmits the external forces acting on the bottom of the box body 10. Therefore, the anti-collision capability of the bottom of the box body 10 can be improved, and the damage to the bottom of the box body 10 caused by the impact can be reduced.

[0030] It should be noted that the battery box is used to store battery modules. When the box body 10 is not provided with the protective plate 30, the battery modules are in contact with the bottom plate 20. When the box body 10 is provided with the protective plate 30, the battery modules are in contact with the protective plate 30.

[0031] When the external force is small and cannot cause the first energy-absorbing part 210 or the second energy-absorbing part 310 to deform, the first energy-absorbing part 210 and the second energy-absorbing part 310 can transmit the external force. At this time, based on the design of the first energy-absorbing part 210 and / or the second energy-absorbing part 310, the transmission path of the external force can be prolonged. Since the energy of the force is gradually consumed in the process of transmission, when the force is transmitted to the battery module, the energy of the force is small and cannot cause damage to the battery module. Thus, the possibility of damage to the battery module due to the external force is reduced, and the anti-collision ability of the battery box is improved.

[0032] When the external force is large and causes the first energy-absorbing part 210 and / or the second energy-absorbing part 310 to deform, the first energy-absorbing part 210 and / or the second energy-absorbing part 310 can absorb the energy of the external force by deforming itself. When the force is transmitted to the battery module, most of the impact energy will be absorbed by the first energy-absorbing part 210 and / or the second energy-absorbing part 310, so that the impact energy acting on the battery module is small and cannot cause damage to the battery module. Thus, the possibility of damage to the battery module due to the external force is reduced, and the anti-collision ability of the battery box is improved.

[0033] In some embodiments, the first energy-absorbing part 210 is in a hollow convex shape, and the height of the first energy-absorbing part 210 can be set to 2 mm. The second energy-absorbing part 310 is in a hollow convex shape, and the height of the second energy-absorbing part 310 can be set to 2 mm. Thus, the height of the first energy-absorbing part 210 and the second energy-absorbing part 310 is small, and the first energy-absorbing part 210 and the second energy-absorbing part 310 occupy less height space inside the battery box. While improving the anti-collision ability of the bottom of the battery box, the space utilization rate of the entire battery pack is as small as possible, and the energy density of the battery pack is not greatly affected. It can be understood that, compared with the profile scheme in the related art, the bottom guard plate is not required in the embodiments of the present application, and the design cost and production cost of the battery pack can be reduced. Compared with the sheet metal scheme in the related art, the first energy-absorbing part 210 and the second energy-absorbing part 310 can provide the effect of energy absorption in the collision at the bottom of the battery box, and the anti-collision ability of the bottom of the battery box is improved, so that the transverse and longitudinal beams do not need to be arranged at the bottom of the box body 10 to improve the strength of the bottom of the battery box. Since the thickness of the transverse and longitudinal beams is usually large, the first energy-absorbing part 210 and the second energy-absorbing part 310 can replace the transverse and longitudinal beams to release a part of the height space inside the battery box, improve the height of the battery module, increase the space utilization rate of the entire battery pack, and improve the energy density of the battery pack.

[0034] It should be noted that, in the direction perpendicular to the bottom plate 20, the first plate body 220 is hollow in the projection area of the first energy-absorbing part 210. That is, the first plate body 220 is hollow in the position corresponding to the first energy-absorbing part 210, the first plate body 220 is connected with the first energy-absorbing part 210 to form a complete bottom plate 20, and the bottom plate 20 does not have a closed cavity. In the direction perpendicular to the protective plate 30, the second plate body 320 is hollow in the projection area of the second energy-absorbing part 310. That is, the second plate body 320 is hollow in the position corresponding to the second energy-absorbing part 310, the second plate body 320 is connected with the second energy-absorbing part 310 to form a complete protective plate 30, and the protective plate 30 does not have a closed cavity.

[0035] In some embodiments, the battery box further comprises a box cover covering the box body 10. Among them, the first energy-absorbing part 210 is convex towards the direction close to the box cover, and the second energy-absorbing part 310 is convex towards the direction away from the box cover.

[0036] In some embodiments, only the bottom plate 20 can form the first energy-absorbing part 210. Alternatively, the first energy-absorbing part 210 is not formed on the bottom plate 20, the protective plate 30 is arranged in the box body 10, and the second energy-absorbing part 310 is formed on the protective plate 30. Alternatively, the first energy-absorbing part 210 is formed on the bottom plate 20, and the protective plate 30 is arranged in the box body 10, and the second energy-absorbing part 310 is formed on the protective plate 30.

[0037] It should be noted that, in order to ensure the energy-absorbing effect, the first energy-absorbing part 210 can extend along the length direction of the first plate body 220, and be arranged at least two on the first plate body 220 in the width direction. Alternatively, the first energy-absorbing part 210 can extend along the width direction of the first plate body 220, and be arranged at least two on the first plate body 220 in the length direction. In order to ensure the energy-absorbing effect, the second energy-absorbing part 310 can extend along the length direction of the second plate body 320, and be arranged at least two on the second plate body 320 in the width direction. Alternatively, the second energy-absorbing part 310 can extend along the width direction of the second plate body 320, and be arranged at least two on the second plate body 320 in the length direction.

[0038] The first energy-absorbing part 210 and the first plate body 220 in the embodiments of the present application are integrally formed. The second energy-absorbing part 310 and the second plate body 320 are integrally formed. Specifically, the bottom plate 20 and the protective plate 30 are both metal plate parts. The first energy-absorbing part 210 and the first plate body 220 are integrally stamped and formed. The second energy-absorbing part 310 and the second plate body 320 are integrally stamped and formed.

[0039] As Figure 2 and Figure 3As shown, in some embodiments, the first energy-absorbing part 210 includes a first energy-absorbing section 2110, a first connecting section 2120, and a second energy-absorbing section 2130. The first connecting section 2120 is spaced apart from the first plate body 220. The opposite ends of the first connecting section 2120 are connected to the first end of the first energy-absorbing section 2110 and the first end of the second energy-absorbing section 2130, respectively. The second end of the first energy-absorbing section 2110 and the second end of the second energy-absorbing section 2130 are both connected to the first plate body 220.

[0040] It can be understood that, when the external force is small, the first energy-absorbing section 2110 and the second energy-absorbing section 2130 can serve as the area for force transmission, thereby prolonging the transmission path of the external force. With the transmission of the external force in the first energy-absorbing section 2110 and the second energy-absorbing section 2130, the energy of the external force is reduced, so as to reduce the impact of the external force on the battery module. When the external force is large, the first energy-absorbing section 2110 and the second energy-absorbing section 2130 can be deformed, thereby absorbing the energy of the external force, so as to reduce the impact of the external force on the battery module. For example, the first energy-absorbing section 2110 and the second energy-absorbing section 2130 are bent under the external force, and the spacing between the first connecting section 2120 and the first plate body 220 is reduced. Thus, the energy of the external force is absorbed based on the bending of the first energy-absorbing part 210 and the second energy-absorbing part 310, so as to reduce the impact of the external force on the battery module.

[0041] In some embodiments, the spacing between the first connecting section 2120 and the first plate body 220 is set to 1-3 mm. For example, the spacing between the first connecting section 2120 and the first plate body 220 is set to 1 mm, 2 mm, 3 mm, or any value between any two of them. Alternatively, the spacing between the first connecting section 2120 and the first plate body 220 can be selected according to the model of the battery box. For example, when the battery box is large, the spacing between the first connecting section 2120 and the first plate body 220 can be set to 5 mm. When the battery box is small, the spacing between the first connecting section 2120 and the first plate body 220 can be set to 1 mm.

[0042] When the protective plate 30 is not arranged in the box body 10, the first connecting section 2120 abuts against the battery module. When the protective plate 30 is arranged in the box body 10, the first connecting section 2120 abuts against the protective plate 30.

[0043] In some embodiments, the first plate body 220 includes a plurality of first base sections spaced apart along the length direction of the bottom plate 20. The number of the first energy-absorbing part 210 is set to at least two. The first base sections and the first energy-absorbing part 210 are arranged alternately. The two ends of each first energy-absorbing part 210 are connected to the adjacent two first base sections. The first connecting section 2120 and the first base section are spaced apart in the thickness direction of the bottom plate 20.

[0044] As shown in FIG. 1, in some embodiments, the first energy-absorbing section 2110 and the second energy-absorbing section 2130 are both inclined towards the direction away from the axis 40 of the first connecting section 2120. Figure 3

[0045] It can be understood that, based on the inclined first energy-absorbing section 2110 and the second energy-absorbing section 2130, the first energy-absorbing section 2110 and the second energy-absorbing section 2130 have a region that bends towards the direction away from the axis 40 under the action of an external force. When the external force is small, the first energy-absorbing section 2110 and the second energy-absorbing section 2130 do not bend. At this time, the first energy-absorbing section 2110 and the second energy-absorbing section 2130 can extend the transmission path of the external force, thereby reducing the impact of the external force on the battery module. When the external force is large, the first energy-absorbing section 2110 and the second energy-absorbing section 2130 will bend along the respective inclined directions. At this time, the first energy-absorbing section 2110 and the second energy-absorbing section 2130 can absorb the energy of the external force through deformation, thereby reducing the impact of the external force on the battery module.

[0046] Based on the fact that the first energy-absorbing section 2110 and the second energy-absorbing section 2130 are both inclined towards the direction away from the axis 40 of the first connecting section 2120, the first energy-absorbing section 2110 and the second energy-absorbing section 2130 are arranged at the opposite ends of the first connecting section 2120 in a substantially eight-shaped manner, so as to form the bottom plate 20 with the first energy-absorbing portion 210, the second energy-absorbing portion 310, the connecting section, and the first plate body 220.

[0047] In other embodiments of the present application, the first energy-absorbing section 2110 and the second energy-absorbing section 2130 can also be inclined towards the direction close to the axis 40 of the first connecting section 2120, and the first energy-absorbing section 2110 and the second energy-absorbing section 2130 are arranged at the opposite ends of the first connecting section 2120 in a substantially inverted eight-shaped manner. At this time, the first energy-absorbing portion 210 can also extend the transmission path of the external force through the first energy-absorbing section 2110 and the second energy-absorbing section 2130 or absorb the energy of the external force through the deformation of the first energy-absorbing section 2110 and the second energy-absorbing section 2130. However, such a mode is not conducive to the manufacturing of the bottom plate 20, and in the embodiments of the present application, it is preferred that the first energy-absorbing section 2110 and the second energy-absorbing section 2130 are both inclined towards the direction away from the axis 40 of the first connecting section 2120.

[0048] It should be noted that the first energy-absorbing section 2110 and the second energy-absorbing section 2130 can be symmetrically arranged at the opposite ends of the first connecting section 2120. The thicknesses of the first energy-absorbing section 2110, the second energy-absorbing section 2130, and the first connecting section 2120 can be the same.

[0049] ​In some embodiments, the connection between the first energy-absorbing section 2110 and the first connecting section 2120, the connection between the first energy-absorbing section 2110 and the first plate body 220, the connection between the second energy-absorbing section 2130 and the first connecting section 2120, and the connection between the second energy-absorbing section 2130 and the first plate body 220 are all arc surface transition connections.

[0050] As shown in FIG. 11, in some embodiments, the inclination angle of the first energy-absorbing section 2110 is A1, and the inclination angle of the second energy-absorbing section 2130 is A2, which satisfy: 100°≤A1≤140°, 100°≤A2≤140°. Figure 4 It can be understood that the inclination angle of the first energy-absorbing section 2110 is set in the range of 100° to 140°, so that the first energy-absorbing section 2110 and the first connecting section 2120 are arranged at an obtuse angle. On the one hand, it is convenient for the stamping forming of the bottom plate 20, and on the other hand, the second energy-absorbing section 2130 has a certain energy-absorbing effect. When the inclination angle of the first energy-absorbing section 2110 is less than 100°, the included angle between the first energy-absorbing section 2110 and the first connecting section 2120 is smaller. At this time, the force for deforming the first energy-absorbing section 2110 is larger. When the external force is too large and cannot cause the first energy-absorbing section 2110 to deform, the external force will have more residual energy to impact the battery module, which may cause damage to the battery module. When the inclination angle of the first energy-absorbing section 2110 is greater than 140°, the included angle between the first energy-absorbing section 2110 and the first connecting section 2120 is larger. At this time, the force for deforming the first energy-absorbing section 2110 is smaller, resulting in poor energy-absorbing effect.

[0051] The inclination angle of the second energy-absorbing section 2130 is set in the range of 100° to 140°, so that the second energy-absorbing section 2130 and the first connecting section 2120 are arranged at an obtuse angle. On the one hand, it is convenient for the stamping forming of the bottom plate 20, and on the other hand, the second energy-absorbing section 2130 has a certain energy-absorbing effect. When the inclination angle of the second energy-absorbing section 2130 is less than 100°, the included angle between the second energy-absorbing section 2130 and the first connecting section 2120 is smaller. At this time, the force for deforming the second energy-absorbing section 2130 is larger. When the external force is too large and cannot cause the second energy-absorbing section 2130 to deform, the external force will have more residual energy to impact the battery module, which may cause damage to the battery module. When the inclination angle of the second energy-absorbing section 2130 is greater than 140°, the included angle between the second energy-absorbing section 2130 and the first connecting section 2120 is larger. At this time, the force for deforming the first energy-absorbing section 2110 is smaller, resulting in poor energy-absorbing effect.

[0052]

[0053] ​It should be noted that the tilt angle of the first energy-absorbing section 2110 and the tilt angle of the second energy-absorbing section 2130 can be the same. Alternatively, the tilt angle of the first energy-absorbing section 2110 and the tilt angle of the second energy-absorbing section 2130 can be different.

[0054] For example, the tilt angle A1 of the first energy-absorbing section 2110 is set to 100°, 110°, 120°, 130°, 140°, or any value between the two. The tilt angle A2 of the second energy-absorbing section 2130 is set to 100°, 110°, 120°, 130°, 140°, or any value between the two.

[0055] like Figure 2 and Figure 3 In some embodiments, the second energy-absorbing section 310 includes a third energy-absorbing segment 3110, a second connecting segment 3120, and a fourth energy-absorbing segment 3130. The second connecting segment 3120 is spaced apart from the second plate body 320. The opposite ends of the second connecting segment 3120 are respectively connected to the first ends of the third energy-absorbing segment 3110 and the fourth energy-absorbing segment 3130. The second ends of the third energy-absorbing segment 3110 and the fourth energy-absorbing segment 3130 are both connected to the second plate body 320.

[0056] Understandably, when the external force is small, the third energy-absorbing section 3110 and the fourth energy-absorbing section 3130 can serve as areas for force transmission, thereby extending the force transmission path. As the force is transmitted within the third energy-absorbing section 3110 and the fourth energy-absorbing section 3130, the energy of the force is reduced, thus minimizing the impact of the external force on the battery module. When the external force is large, the third energy-absorbing section 3110 and the fourth energy-absorbing section 3130 can deform, thereby absorbing the energy of the external force and reducing the impact of the external force on the battery module. For example, the third energy-absorbing section 3110 and the fourth energy-absorbing section 3130 may bend under the external force, reducing the distance between the second connecting section 3120 and the second plate body 320. Thus, the energy of the external force is absorbed based on the bending of the second energy-absorbing section 310, thereby reducing the impact of the external force on the battery module.

[0057] In some embodiments, the distance between the second connecting segment 3120 and the second plate body 320 is set to 1 to 3 mm. For example, the distance between the second connecting segment 3120 and the second plate body 320 is set to 1 mm, 2 mm, 3 mm, or any value between the two. Alternatively, the distance between the second connecting segment 3120 and the second plate body 320 can be selected according to the model of the battery box. For example, when the battery box is large, the distance between the second connecting segment 3120 and the second plate body 320 can be set to 5 mm. When the battery box is small, the distance between the second connecting segment 3120 and the second plate body 320 can be set to 1 mm.

[0058] It should be noted that the spacing between the second connecting segment 3120 and the second plate body 320 can be the same as the spacing between the first connecting segment 2120 and the first plate body 220. Alternatively, the spacing between the second connecting segment 3120 and the second plate body 320 can be different from the spacing between the first connecting segment 2120 and the first plate body 220.

[0059] When the protective plate 30 is installed inside the housing 10, the second plate body 320 abuts against the battery module, and the second connecting section 3120 abuts against the first connecting section 2120. The first connecting section 2120 and the second connecting section 3120 can be further fixed by welding or other methods to ensure a reliable connection between the protective plate 30 and the base plate 20.

[0060] In some embodiments, the second plate body 320 includes a plurality of second base segments spaced apart along the length direction of the protective plate 30. The number of second energy-absorbing portions 310 is set to at least two. The second base segments and second energy-absorbing portions 310 are alternately arranged. Each second energy-absorbing portion 310 is connected at both ends to two adjacent second base segments. The second connecting segment 3120 and the second base segments are spaced apart along the thickness direction of the protective plate 30.

[0061] like Figure 3 As shown, in some embodiments, the third energy-absorbing section 3110 and the fourth energy-absorbing section 3130 are both inclined in a direction away from the axis 40 of the second connecting section 3120.

[0062] It can be understood that, based on the inclined arrangement of the third energy-absorbing section 3110 and the fourth energy-absorbing section 3130, the third energy-absorbing section 3110 and the fourth energy-absorbing section 3130 can have a region that bends away from the axis 40 under the action of an external force. When the external force is small, the third energy-absorbing section 3110 and the fourth energy-absorbing section 3130 will not bend. At this time, the third energy-absorbing section 3110 and the fourth energy-absorbing section 3130 can extend the transmission path of the external force, thereby reducing the impact of the external force on the battery module. When the external force is large, the third energy-absorbing section 3110 and the fourth energy-absorbing section 3130 will bend in the respective inclined directions. At this time, the third energy-absorbing section 3110 and the fourth energy-absorbing section 3130 can absorb the energy of the external force by deformation, thereby reducing the impact of the external force on the battery module.

[0063] Based on the fact that the third energy-absorbing section 3110 and the fourth energy-absorbing section 3130 are both inclined away from the axis 40 of the second connecting section 3120, the third energy-absorbing section 3110 and the fourth energy-absorbing section 3130 are arranged at the opposite ends of the second connecting section 3120 in a substantially inverted eight-shaped manner, so as to form a stable bottom plate 20.

[0064] In other embodiments of the present application, the third energy-absorbing section 3110 and the fourth energy-absorbing section 3130 can also be inclined toward the axis 40 of the second connecting section 3120, and the third energy-absorbing section 3110 and the fourth energy-absorbing section 3130 are arranged at the opposite ends of the second connecting section 3120 in an eight-shaped manner. At this time, the second energy-absorbing section 310 can also extend the transmission path of the external force through the third energy-absorbing section 3110 and the fourth energy-absorbing section 3130, or absorb the energy of the external force through the deformation of the third energy-absorbing section 3110 and the fourth energy-absorbing section 3130. However, such a manner is not conducive to the manufacturing of the bottom plate 20, and it is preferred in the embodiments of the present application that the third energy-absorbing section 3110 and the fourth energy-absorbing section 3130 are both inclined away from the axis 40 of the second connecting section 3120.

[0065] It should be noted that the third energy-absorbing section 3110 and the fourth energy-absorbing section 3130 can be symmetrically arranged at the opposite ends of the second connecting section 3120. The thicknesses of the third energy-absorbing section 3110, the fourth energy-absorbing section 3130, and the second connecting section 3120 can be the same.

[0066] In some embodiments, the connection between the third energy-absorbing section 3110 and the second connecting section 3120, the connection between the third energy-absorbing section 3110 and the second plate body 320, the connection between the fourth energy-absorbing section 3130 and the second connecting section 3120, and the connection between the fourth energy-absorbing section 3130 and the second plate body 320 all adopt arc surface transition connections.

[0067] As Figure 4As shown, in some embodiments, the third energy-absorbing section 3110 has an inclination angle A3, and the fourth energy-absorbing section 3130 has an inclination angle A4, which satisfy: 100°≤A3≤140°, 100°≤A4≤140°.

[0068] It can be understood that the inclination angle of the third energy-absorbing section 3110 is set in the range of 100° to 140°, so that the third energy-absorbing section 3110 is arranged at an obtuse angle with the second connecting section 3120. On the one hand, it is convenient for the stamping forming of the bottom plate 20, and on the other hand, the fourth energy-absorbing section 3130 has a certain energy-absorbing effect. When the inclination angle of the third energy-absorbing section 3110 is less than 100°, the included angle between the third energy-absorbing section 3110 and the second connecting section 3120 is smaller. At this time, the force for deforming the third energy-absorbing section 3110 is larger. When the external force is too large and cannot cause the third energy-absorbing section 3110 to deform, the external force will have more residual energy to impact the battery module, which may cause damage to the battery module. When the inclination angle of the third energy-absorbing section 3110 is greater than 140°, the included angle between the third energy-absorbing section 3110 and the second connecting section 3120 is larger. At this time, the force for deforming the third energy-absorbing section 3110 is smaller, resulting in poor energy-absorbing effect.

[0069] The inclination angle of the fourth energy-absorbing section 3130 is set in the range of 100° to 140°, so that the fourth energy-absorbing section 3130 is arranged at an obtuse angle with the second connecting section 3120. On the one hand, it is convenient for the stamping forming of the bottom plate 20, and on the other hand, the fourth energy-absorbing section 3130 has a certain energy-absorbing effect. When the inclination angle of the fourth energy-absorbing section 3130 is less than 100°, the included angle between the fourth energy-absorbing section 3130 and the second connecting section 3120 is smaller. At this time, the force for deforming the fourth energy-absorbing section 3130 is larger. When the external force is too large and cannot cause the fourth energy-absorbing section 3130 to deform, the external force will have more residual energy to impact the battery module, which may cause damage to the battery module. When the inclination angle of the fourth energy-absorbing section 3130 is greater than 140°, the included angle between the fourth energy-absorbing section 3130 and the second connecting section 3120 is larger. At this time, the force for deforming the third energy-absorbing section 3110 is smaller, resulting in poor energy-absorbing effect.

[0070] It should be noted that the inclination angle of the third energy-absorbing section 3110 and the inclination angle of the fourth energy-absorbing section 3130 can be the same. Alternatively, the inclination angle of the third energy-absorbing section 3110 and the inclination angle of the fourth energy-absorbing section 3130 are different.

[0071] For example, the inclination angle A3 of the third energy-absorbing section 3110 is set to 100°, 110°, 120°, 130°, 140°, or any value between any two of them. The inclination angle A4 of the fourth energy-absorbing section 3130 is set to 100°, 110°, 120°, 130°, 140°, or any value between any two of them.

[0072] Please continue to refer to Figure 3 In some embodiments, the first plate body 220 is spaced apart from the second plate body 320, the first energy-absorbing part 210 protrudes towards the second plate body 320, the second energy-absorbing part 310 protrudes towards the first plate body 220, and the first energy-absorbing part 210 and the second energy-absorbing part 310 abut.

[0073] It can be understood that when the protective plate 30 is arranged in the box body 10, and the bottom plate 20 is formed with the first energy-absorbing part 210 and the protective plate 30 is formed with the second energy-absorbing part 310, the first energy-absorbing part 210 and the second energy-absorbing part 310 can protrude towards each other and abut. Among them, the first connecting section 2120 of the first energy-absorbing part 210 and the second connecting section 3120 of the second energy-absorbing part 310 abut.

[0074] When the external force acting on the bottom plate 20 is small, the external force acting on the bottom plate 20 can be transmitted to the protective plate 30 through the first energy-absorbing part 210 and the second energy-absorbing part 310, and the transmission path of the external force is prolonged based on the first energy-absorbing part 210 and the second energy-absorbing part 310, thereby consuming most of the energy of the external force, so that the force acting on the battery module is small, and the battery module is prevented from being damaged.

[0075] When the external force acting on the bottom plate 20 is large, the external force acting on the bottom plate 20 can be transmitted to the first energy-absorbing part 210 and the second energy-absorbing part 310, and the first energy-absorbing part 210 and the second energy-absorbing part 310 are deformed, thereby consuming most of the energy of the external force, so that the force acting on the battery module is small, and the battery module is prevented from being damaged.

[0076] In some embodiments, at least two first energy-absorbing parts 210 are spaced apart on the first plate body 220. At least two second energy-absorbing parts 310 are spaced apart on the second plate body 320. A first energy-absorbing part 210 corresponds to abutting a second energy-absorbing part 310. Among them, the adjacent two first energy-absorbing parts 210 and the adjacent two second energy-absorbing parts 310 enclose an energy-absorbing cavity 50 between the first plate body 220 and the second plate body 320.

[0077] It can be understood that the two adjacent first energy absorbing portions 210 and the two adjacent second energy absorbing portions 310 enclose the energy absorbing cavity 50 between the first plate body 220 and the second plate body 320 to maximize the path of force transmission and facilitate deformation of the first energy absorbing section 2110, the second energy absorbing section 2130, the third energy absorbing section 3110, and the fourth energy absorbing section 3130. When the bottom plate 20 is subjected to a large external force, the first energy absorbing section 2110, the second energy absorbing section 2130, the third energy absorbing section 3110, and the fourth energy absorbing section 3130 will deform to reduce the cavity height of the energy absorbing cavity 50.

[0078] In some embodiments, the energy absorbing cavity 50 is provided with a heat preservation layer.

[0079] It can be understood that the heat preservation layer provided in the energy absorbing cavity 50 can provide the battery box bottom with certain heat preservation capacity, so that the battery has good heat preservation effect when used in cold environment, and the battery efficiency is improved.

[0080] In some embodiments, the heat preservation layer can be heat preservation cotton or the like filled in the energy absorbing cavity 50.

[0081] Please continue to refer to Figure 3 In some embodiments, the side of the bottom plate 20 away from the protective plate 30 is provided with a protective layer 60.

[0082] It can be understood that the protective layer 60 can protect the bottom plate 20. For example, it can prevent the bottom plate 20 from being scratched.

[0083] For example, the protective layer 60 is made of PVC (Polyvinyl chloride) material. At this time, the protective layer 60 can have the effects of scratch prevention, corrosion prevention, stone impact resistance, etc. on the bottom plate 20.

[0084] It should be noted that the protective layer 60 can be a particle layer sprayed on the outer surface of the bottom plate 20, so that the shape of the protective layer 60 is adapted to the shape of the bottom plate 20. The thickness of the protective layer 60 can be set to 1 millimeter, so that it can cover all areas of the outer surface of the bottom plate 20, or only cover the area of the bottom plate 20 where the first energy absorbing portion 210 is formed.

[0085] The embodiments of the application also provide a battery pack. The battery pack includes the battery box as in the foregoing embodiments.

[0086] In the embodiment of the present application, the bottom plate 20 is provided with the first energy absorbing part 210, so that the first energy absorbing part 210 is used to absorb and / or transmit the external force received by the bottom of the box body 10, and / or the protection plate 30 is arranged in the box body 10, and the protection plate 30 is provided with the second energy absorbing part 310, so that the second energy absorbing part 310 is used to absorb and / or transmit the external force received by the bottom of the box body 10. Therefore, the anti-collision capability of the bottom of the battery pack can be improved, and the damage of the bottom of the battery pack caused by the impact can be reduced.

[0087] The above describes the embodiments of the present application in detail, and the principles and implementation modes of the present application are described by applying specific examples. The above embodiment is only used to help understand the method and core idea of the present application. Meanwhile, for those skilled in the art, the specific implementation modes and application ranges will be changed according to the idea of the present application. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A battery box, characterized in that, include: The box-shaped enclosure has a bottom plate. The bottom plate includes a first plate body and a first energy-absorbing part protruding from the first plate body, the first energy-absorbing part being configured to absorb and / or transmit external forces acting on the bottom of the box; and / or, a protective plate is provided inside the box, the protective plate being connected to the bottom plate, the protective plate including a second plate body and a second energy-absorbing part protruding from the second plate body, the second energy-absorbing part being configured to absorb and / or transmit external forces acting on the bottom of the box.

2. The battery box according to claim 1, characterized in that, The first energy-absorbing part includes a first energy-absorbing section, a first connecting section, and a second energy-absorbing section. The first connecting section is spaced apart from the first plate body. The opposite ends of the first connecting section are respectively connected to the first end of the first energy-absorbing section and the first end of the second energy-absorbing section. The second end of the first energy-absorbing section and the second end of the second energy-absorbing section are both connected to the first plate body.

3. The battery box according to claim 2, characterized in that, Both the first energy-absorbing section and the second energy-absorbing section are inclined in a direction away from the axis of the first connecting section.

4. The battery box according to claim 3, characterized in that, The tilt angle of the first energy-absorbing section is A1, and the tilt angle of the second energy-absorbing section is A2, satisfying: 100°≤A1≤140°, 100°≤A2≤140°.

5. The battery box according to claim 1, characterized in that, The second energy-absorbing section includes a third energy-absorbing segment, a second connecting segment, and a fourth energy-absorbing segment. The second connecting segment is spaced apart from the second plate body. The two opposite ends of the second connecting segment are respectively connected to the first end of the third energy-absorbing segment and the first end of the fourth energy-absorbing segment. The second ends of the third energy-absorbing segment and the second ends of the fourth energy-absorbing segment are both connected to the second plate body.

6. The battery box according to claim 5, characterized in that, Both the third and fourth energy-absorbing sections are inclined in a direction away from the axis of the second connecting section.

7. The battery box according to claim 6, characterized in that, The tilt angle of the third energy-absorbing section is A3, and the tilt angle of the fourth energy-absorbing section is A4, satisfying: 100°≤A3≤140°, 100°≤A4≤140°.

8. The battery box according to any one of claims 1 to 7, characterized in that, The first plate body and the second plate body are spaced apart. The first energy-absorbing part protrudes towards the second plate body, and the second energy-absorbing part protrudes towards the first plate body, and the first energy-absorbing part abuts against the second energy-absorbing part.

9. The battery box according to claim 8, characterized in that, The first plate body is provided with at least two first energy-absorbing parts at intervals, and the second plate body is provided with at least two second energy-absorbing parts at intervals. One first energy-absorbing part abuts against one second energy-absorbing part. The two adjacent first energy-absorbing parts and the two adjacent second energy-absorbing parts form an energy-absorbing cavity between the first plate body and the second plate body.

10. The battery box according to claim 9, characterized in that, The energy-absorbing cavity is equipped with a heat-insulating layer.

11. The battery box according to any one of claims 1 to 7, characterized in that, The base plate has a protective layer on the side away from the protective plate.

12. A battery pack, characterized in that, Includes the battery box as described in any one of claims 1 to 11.

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