Battery box body, power battery assembly and vehicle

Abstract

The utility model relates to the technical field of batteries, and particularly discloses a battery box body, a power battery assembly and a vehicle, the battery box body comprises a box body and a plurality of convex parts and / or a plurality of concave parts, the box body is provided with a containing groove, the convex parts and / or the concave parts are arranged on the side wall of the containing groove, and the convex parts and / or the concave parts are arranged on the side wall of the containing groove. And the plurality of convex parts and / or the plurality of concave parts are arranged on the side wall of the accommodating groove at intervals. The plurality of convex parts and / or the plurality of concave parts can form wrinkles on the inner side wall of the box body, the connection area of the box body and the filling piece is increased, the box body and the filling piece are connected in an intervention type connection mode, the structure is simple, processing is convenient, stress is dispersed, the protection effect of the filling piece on the battery module is effectively guaranteed, and the service life of the battery module is prolonged. And the stress damage condition of the battery module is also reduced while the glue failure of the filling piece and the battery box body is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery box, a power battery assembly and a vehicle. Background Art

[0002] The battery case is a key component of the power battery pack. The battery module is housed within the case, providing structural and mechanical support. A pre-set gap is created between the battery case and the module, which is filled with fillers such as foam to encapsulate the sensitive components of the battery module. Foam itself has tiny air bubbles, making it weaker when bonded to metal. This often causes the interface between the foam and the battery case to delaminate or separate under vibration.

[0003] In order to solve the above problems, in the related art, a structural reinforcement is provided on the inner side of the battery case, and a receiving cavity is provided on the structural reinforcement that is connected to the inner space of the case frame. The receiving cavity is configured to receive at least part of the foam glue to increase the bonding area and connection strength of the foam glue. However, in order to realize the processing of the receiving cavity and the filling of the receiving cavity with the foam glue, the volume of the receiving cavity and the overall volume of the structural reinforcement need to be designed to be large in size, with a complex shape and structure, which occupies too much of the preset gap, reduces the filling space between the battery case and the battery module, and reduces the buffering protection performance of the foam glue for the battery module. In addition, when the battery case is hit by external force, the local impact force of the structural reinforcement on the foam glue is large, and the protective performance of the foam glue between the structural reinforcement and the battery module is weak. The structural reinforcement is prone to excessive impact or even puncture the foam glue, damaging the battery module. Utility Model Content

[0004] The purpose of the present utility model is to provide a battery box, a power battery assembly and a vehicle, so as to solve the problems in the related art that the connection interface between the foam rubber and the battery box is prone to debonding or separation, the structure of the structural reinforcement is complex, and the battery module is easily damaged by force.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] In a first aspect, the present invention provides a battery box, comprising:

[0007] The box body has a receiving groove;

[0008] A plurality of protrusions and / or a plurality of recesses, wherein the protrusions and / or the recesses are all arranged on the side wall of the accommodating groove, and the plurality of protrusions and / or the plurality of recesses are arranged at intervals on the side wall of the accommodating groove.

[0009] In one embodiment, the arrangement direction of the plurality of protrusions is the depth direction of the receiving groove, and / or the arrangement direction of the plurality of protrusions is the circumference direction of the receiving groove; and / or,

[0010] The arrangement direction of the plurality of recessed portions is the depth direction of the receiving groove, and / or the arrangement direction of the plurality of recessed portions is the circumferential direction of the receiving groove.

[0011] In one embodiment, the raised portion and / or the recessed portion is a long strip structure.

[0012] In one embodiment, the height of the protrusion is in the range of 0.5 mm to 3 mm; and / or,

[0013] The width of the protrusion is in the range of 0.5 mm to 3 mm; and / or,

[0014] The pitch between two adjacent protrusions ranges from 5 mm to 20 mm.

[0015] In one embodiment, the depth of the concave portion ranges from 1 mm to 10 mm; and / or,

[0016] The width of the recessed portion ranges from 2 mm to 50 mm; and / or,

[0017] The pitch between two adjacent recessed portions ranges from 5 mm to 50 mm.

[0018] In one embodiment, the junction between the protrusion and / or the recess and the side wall of the receiving groove is integrally formed and has a smooth curved surface transition.

[0019] In one embodiment, the outline dimension of the protrusion near the bottom wall of the receiving groove is smaller than the outline dimension near the notch of the receiving groove, and / or the outline dimension of the root of the protrusion at the junction with the side wall of the receiving groove is smaller than the outline dimension of the top away from the junction with the side wall of the receiving groove; and / or,

[0020] The outline dimension of the recessed portion near the bottom wall of the accommodating groove is larger than the outline dimension near the notch of the accommodating groove, and / or the outline dimension of the recessed portion at the junction with the side wall of the accommodating groove is larger than the outline dimension of the recessed portion away from the junction with the side wall of the accommodating groove.

[0021] In a second aspect, the utility model provides a power battery assembly, including a battery module, and the power battery assembly also includes a battery box body in any of the above-mentioned schemes, the battery module is arranged in the accommodating groove, and a filling piece is provided between the battery module and the side wall of the accommodating groove, and the protrusion and / or the recessed portion are both connected to the filling piece.

[0022] In one embodiment, a plurality of ribs and / or a plurality of grooves are spaced apart on the side wall of the battery module, and the plurality of ribs and / or the plurality of grooves are all connected to the filling piece.

[0023] In a third aspect, the present invention provides a vehicle comprising a power battery assembly according to any of the above solutions.

[0024] The beneficial effects of the utility model are:

[0025] The battery box, power battery assembly and vehicle provided by the present invention all include a box body and multiple protrusions and / or multiple recessed portions. The multiple protrusions and / or multiple recessed portions can form wrinkles on the inner side wall of the box body, thereby increasing the connection area between the box body and the filler, and connecting the box body and the filler in an intervention-type connection manner. The structure is simple, the processing is convenient, and the force is dispersed, which effectively ensures the protective effect of the filler on the battery module, reduces the debonding between the filler and the battery box, and also reduces the force damage to the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the separation state of the battery box and the battery module in the related art;

[0027] Figure 2 This is a structural diagram of the box body provided with a protruding portion in an embodiment of the present utility model;

[0028] Figure 3 This is a schematic structural diagram of the raised portion in an embodiment of the present utility model;

[0029] Figure 4 This is a structural diagram of the case body provided with a recessed portion in an embodiment of the present invention;

[0030] Figure 5 This is a schematic structural diagram of the concave portion in an embodiment of the present utility model;

[0031] Figure 6 Schematic diagram of the cross-sectional profile of the raised portion in an embodiment of the present invention.

[0032] In the picture:

[0033] 1. Box body; 11. Receiving slot;

[0034] 2. Raised part;

[0035] 3. Recessed part;

[0036] 4. Battery module;

[0037] 5. Filling parts. DETAILED DESCRIPTION

[0038] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0039] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0040] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0041] In the description of this embodiment, terms regarding orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and do not have any special meanings.

[0042] In the related art, in order to realize the processing of the accommodating cavity and the filling of the accommodating cavity with foam glue, the volume of the accommodating cavity and the overall volume of the structural reinforcement need to be designed to be larger in size, with complex shape and structure, which occupies too much of the preset gap, reduces the filling space between the battery box and the battery module by the foam glue, and also reduces the buffering and protective performance of the foam glue to the battery module. When the battery box is hit by external force, the local impact force of the structural reinforcement on the foam glue is large, and the protective performance of the foam glue between the structural reinforcement and the battery module is weak. The structural reinforcement is prone to excessive impact or even puncture the foam glue, damaging the battery module.

[0043] The utility model provides a plurality of protrusions and / or a plurality of recessed portions on the side walls of the box body, so that wrinkles can be formed on the side walls of the box body, thereby increasing the connection area between the box body and the filling piece, and enabling the box body and the filling piece to be connected in an intervention-type connection manner. The utility model has a simple structure, is easy to process, and disperses the force, which effectively ensures the protective effect of the filling piece on the battery module, reduces the debonding between the filling piece and the battery box body, and reduces the force damage to the battery module, thereby avoiding the defects and problems in the related technology.

[0044] In an embodiment of the present invention, a battery case is provided, comprising a case body, and further comprising a plurality of raised portions and / or a plurality of recessed portions, wherein the case body has a receiving groove, and the receiving groove can accommodate a battery module and a filler. The raised portions and / or recessed portions are both arranged on the side walls of the receiving groove, and the plurality of raised portions and / or recessed portions are spaced apart on the side walls of the receiving groove, which can form wrinkles on the inner side walls of the case body, thereby increasing the connection area between the case body and the filler, and connecting the case body and the filler in an intervention-type connection manner. The case body has a simple structure, is easy to process, and has a dispersed force, effectively ensuring the protective effect of the filler on the battery module, reducing the debonding between the filler and the battery case, and also reducing the force damage to the battery module.

[0045] A raised portion refers to a block-like structure with a certain raised height and disposed on the sidewall of the receiving groove. A recessed portion refers to a groove-like structure with a certain recessed depth and disposed on the sidewall of the receiving groove. Multiple raised portions and / or multiple recessed portions arranged at intervals on the sidewall of the receiving groove indicate that the raised portions and recessed portions are independent structures and may be spaced apart.

[0046] It should be noted that the raised and recessed portions can be, but are not limited to, elongated or segmented structures, and can be arranged in an array along one direction or randomly arranged in different directions. The elongated structure has an extended length much greater than its cross-sectional area, allowing it to form a larger connection area. Segmented structures have similar extension dimensions in all directions. For example, hemispherical protrusions or cubic grooves can form multi-directional limits in both the depth and circumference of the receiving groove.

[0047] In addition, protrusions and recesses can be provided on each wall surface corresponding to the space between the battery module and the box body where filler is required. The bottom wall of the receiving groove can be pressed against the filler by utilizing the gravity of the battery module itself. The side walls of the receiving groove are different from the bottom wall of the receiving groove. The side walls of the receiving groove are the vertical surface and the main connection surface between the filler and the box body. If the filler is connected to the side walls of the receiving groove by utilizing the adhesive properties of its own material, the probability of the side walls of the receiving groove and the filler being debonded is much greater than the probability of the bottom wall of the receiving groove and the filler being debonded. Therefore, the receiving groove needs to at least have protrusions and recesses spaced apart on its side walls to ensure a stable connection between the filler and the box body.

[0048] When the filler is installed in the battery box for use, the connection area between the protrusion or recessed portion and the filler is larger than the original connection area between the box body and the filler at the corresponding protrusion or recessed portion. By providing the protrusion or recessed portion, the connection area between the inner wall of the box body and the filler can be increased, and the force per unit area can be reduced. The protrusion or recessed portion and the filler can also form an intervention-type connection structure such as a plug-in or clip-on connection set at intervals, which improves the connection stability between the box body and the filler and can effectively disperse the force, reducing the situation where the box body and the filler are easy to open or separate under vibration conditions. At the same time, the protrusion and recessed portion have a simple structure and are easy to process. The protrusion height and the recessed depth of the recessed portion can be designed to be much smaller than the size of the structural reinforcement in the related art, reducing the occupation of the preset gap size between the battery case and the battery module, and also reducing the occupation of the filling space of the filler, ensuring the buffering protection performance of the filler for the battery module. When the battery case is hit by external force, the multiple protrusions or multiple recessed portions are not only less stressed, but also dispersed, and the filler has good protection performance for the battery module, reducing the impact damage to the battery module, and solving the problem in the related art that the connection interface between the foam and the battery case is prone to debonding or detachment, the setting of the structural reinforcement structure is complex, and the battery module is easily damaged by force.

[0049] Optionally, the specific structure of the box body can be set according to the use requirements of the power battery. The box body at least includes a lower box body, and a receiving groove is provided on the lower box body. The receiving groove is used to place the battery module to facilitate the support and protection of the battery module. Of course, the box body can also include an upper box body, and the upper box body and the lower box body are detachably connected to facilitate the installation of the battery module. The connection method between the upper box body and the lower box body can include but is not limited to one or more of bolt connection, clamping, bonding and magnetic connection. A receiving groove can also be provided on the upper box body, which can cover, support and protect some battery modules. Therefore, the box body of this embodiment can only refer to the lower box body. At this time, the notch of the lower box body can be blocked and sealed by a variety of seals such as a cover plate. The box body can also refer to a combined box body of the lower box body and the upper box body. A receiving groove can be provided on both the lower box body and the upper box body.

[0050] See Figures 1 to 3 As shown, the Z direction shown in the figure is a schematic diagram of the depth direction of the receiving groove 11. In some embodiments, only multiple protrusions 2 can be provided on the sidewall of the receiving groove 11. The multiple protrusions 2 are all provided on the sidewall of the receiving groove 11, and the multiple protrusions 2 are arranged at intervals on the sidewall of the receiving groove 11. The protrusions 2 have a certain hardness and rigidity, which can maintain the connection stability while increasing the connection area.

[0051] See Figures 4 and 5 As shown, optionally, only a plurality of recessed portions 3 may be provided on the sidewall of the receiving groove 11. The plurality of recessed portions 3 are all provided on the sidewall of the receiving groove 11, and the plurality of recessed portions 3 are spaced apart on the sidewall of the receiving groove 11. The recessed portions 3 increase the connection area between the filling member 5 and the box body 1 while avoiding the protrusion design on the surface of the box body 1. This further reduces the risk of the protrusion design on the surface of the box body 1 puncturing and damaging the filling member 5 or the battery module 4 when the box body 1 is impacted by external forces.

[0052] Optionally, a plurality of protrusions 2 and a plurality of recessed portions 3 may be jointly provided on the side walls of the accommodating groove 11. The plurality of protrusions 2 and the plurality of recessed portions 3 are all provided on the side walls of the accommodating groove 11, and the plurality of protrusions 2 and the plurality of recessed portions 3 are arranged at intervals on the side walls of the accommodating groove 11. The protrusions 2 and the recessed portions 3 are provided together, which can improve the intervention connection effect between the filling piece 5 and the bracket of the box body 1, increase the connection area, and ensure the buffering protection performance of the filling piece 5 on the battery module 4.

[0053] Optionally, when a recessed portion 3 is provided on the inner wall of the box body 1, the box body 1 can be designed with uniform wall thickness, and a plurality of protruding structures can be adaptively designed on the outer wall of the box body 1 at corresponding positions of the recessed portion 3. The box body 1 can be a box wall with a wavy cross-section, and the wall thickness at each position can be equal to avoid excessive differences in the wall thickness of the box body 1, which results in excessive differences in force and prone to stress concentration problems.

[0054] In other embodiments, the raised portions 2 and recessed portions 3 may be provided along the entire circumferential sidewall of the receiving groove 11, or on any two opposing sidewalls of the receiving groove 11. For example, the raised portions 2 may be provided on one sidewall of the receiving groove 11, and the recessed portions 3 may be provided on the other sidewall of the receiving groove 11. The raised portions 2 may be provided on the sidewall of the receiving groove 11 with a lower probability of collision. Alternatively, the raised portions 2 and recessed portions 3 may be provided alternately on any sidewall of the receiving groove 11.

[0055] Optionally, the raised portion 2 and the box body 1 may be integrally formed, or the raised portion 2 and the box body 1 may be detachably connected, and the connection may be, but is not limited to, a snap connection or a magnetic connection. The tops of the multiple raised portions 2 may face the same direction toward the receiving groove 11, or may face different directions randomly, and can be processed according to usage needs.

[0056] In some embodiments, the arrangement direction of the multiple protrusions 2 is the depth direction of the accommodating groove 11, that is, the multiple protrusions 2 can be arranged in sequence along the depth direction of the accommodating groove 11. While increasing the connection area between the box body 1 and the filling piece 5 and improving the connection stability, it can reduce the relative displacement of the box body 1 and the filling piece 5 in the depth direction of the accommodating groove 11, and reduce the situation where the filling piece 5 falls out of the box body 1.

[0057] See Figures 2 to 3 As shown, optionally, the arrangement direction of the multiple protrusions 2 is the circumferential direction of the receiving groove 11, that is, the multiple protrusions 2 can be arranged in sequence along the circumference of the receiving groove 11, which increases the connection area between the box body 1 and the filling piece 5 and improves the connection stability. At the same time, it can reduce the relative displacement of the box body 1 and the filling piece 5 in the circumferential direction of the receiving groove 11 and reduce the shaking and detachment of the filling piece 5 in the box body 1.

[0058] Optionally, the arrangement direction of the multiple recessed portions 3 is the depth direction of the accommodating groove 11, that is, the multiple recessed portions 3 can be arranged in sequence along the depth direction of the accommodating groove 11, thereby increasing the connection area between the box body 1 and the filling piece 5 and improving the safety of the battery module 4. At the same time, the relative displacement of the box body 1 and the filling piece 5 in the depth direction of the accommodating groove 11 is reduced, and the situation of the filling piece 5 falling out of the box body 1 is reduced.

[0059] See Figures 4 and 5 As shown, optionally, the arrangement direction of the multiple recessed portions 3 is the circumferential direction of the accommodating groove 11, that is, the multiple recessed portions 3 can be arranged in sequence along the circumference of the accommodating groove 11. While increasing the connection area between the box body 1 and the filling piece 5 and improving the safety of the battery module 4, it can reduce the relative displacement of the box body 1 and the filling piece 5 in the circumferential direction of the accommodating groove 11 and reduce the shaking and detachment of the filling piece 5 in the box body 1.

[0060] Alternatively, the protrusions 2 and the recesses 3 may be provided together, with the plurality of protrusions 2 arranged in the depth direction of the receiving groove 11, and the plurality of recesses 3 arranged in the depth direction of the receiving groove 11. Alternatively, the plurality of protrusions 2 may be arranged in the depth direction of the receiving groove 11, and the plurality of recesses 3 may be arranged in the circumferential direction of the receiving groove 11. Alternatively, the plurality of protrusions 2 may be arranged in the circumferential direction of the receiving groove 11, and the plurality of recesses 3 may be arranged in the depth direction of the receiving groove 11. Alternatively, the plurality of protrusions 2 may be arranged in the circumferential direction of the receiving groove 11, and the plurality of recesses 3 may be arranged in the circumferential direction of the receiving groove 11. This can take into account both the connection stability between the filler 5 and the box body 1 and the safety of use of the battery module 4, and can also reduce the relative displacement between the filler 5 and the box body 1 in multiple directions.

[0061] Among them, the arrangement direction of some of the multiple protrusions 2 is the depth direction of the receiving groove 11, and the arrangement direction of the other part is the circumferential direction of the receiving groove 11. Of course, the arrangement direction of some of the multiple recessed parts 3 is the depth direction of the receiving groove 11, and the arrangement direction of the other part is the circumferential direction of the receiving groove 11, which is convenient for processing.

[0062] See Figures 2 to 4 As shown, in some embodiments, the raised portion 2 and / or the recessed portion 3 is a long strip structure, the extended length of the long strip structure is much larger than the outline size of the cross section, and the long strip structure can form a larger connection area, for example, a semi-cylindrical protrusion or a rectangular groove.

[0063] It should be noted here that the extension direction of the elongated structure refers to the length direction of the elongated structure, the cross-section of the elongated structure is the section in the width direction or short axis direction of the elongated structure, and the longitudinal section of the elongated structure refers to the section in the length direction of the elongated structure.

[0064] Optionally, when the elongated structure extends along the depth direction of the receiving groove 11, the elongated structure can extend from the bottom wall of the receiving groove 11 to the notch of the receiving groove 11. Of course, a certain distance can also be reserved between the elongated structure and the bottom wall of the receiving groove 11, and between the elongated structure and the notch of the receiving groove 11.

[0065] See Figure 3 and Figure 6 As shown, optionally, the cross-sectional shape of the protrusion 2 and / or the recessed portion 3 includes one or more combinations of semicircle, semi-ellipse and polygon. The polygon may be, but is not limited to, a square, trapezoid or hexagon. The short base of the trapezoid may be engaged with the side wall of the accommodating groove 11. The cross-sectional shape of the protrusion 2 and / or the recessed portion 3 can be set according to usage requirements.

[0066] like Figures 2 to 3 as well as Figure 6As shown in the figure, H1 is a schematic diagram of the raised height of the raised portion 2, W1 is a schematic diagram of the width of the raised portion 2, and L1 is a schematic diagram of the pitch between two adjacent raised portions 2. In some embodiments, the raised height of the raised portion 2 ranges from 0.5 mm to 3 mm, wherein the raised height of the raised portion 2 can be 0.5 mm, 2.6 mm or 3 mm, which is not specifically limited here. When the raised height of the raised portion 2 is 0.5 mm, while increasing the connection area between the box body 1 and the filler 5, safety is taken into account, reducing the situation where the raised portion 2 punctures the filler 5 and the battery module 4 under the action of external force impact, reducing the space occupied by the preset gap between the battery box body and the battery module 4, and facilitating the full filling of the filler 5. When the raised height of the raised portion 2 is 2.6 mm, the connection area between the box body 1 and the filler 5 can be further increased, and the raised portion 2 is easy to process, while increasing the connection area, the processing convenience and safety of the box body 1 are taken into account. When the protrusion height of the protrusion 2 is 3 mm, the connection area between the box body 1 and the filling piece 5 can be increased to a greater extent.

[0067] Optionally, the width of the protrusion 2 ranges from 0.5 mm to 3 mm. The width of the protrusion 2 refers to the outline size of the protrusion 2 in the circumferential direction of the receiving groove 11 in the cross section of the box body 1 perpendicular to the depth direction of the receiving groove 11. The width of the protrusion 2 can be the same or different at different recessed depths of the protrusion 2. For example, Figure 3 As shown, in the cross section of the box body 1 along the depth direction perpendicular to the receiving groove 11, the width of the protrusion 2 at the junction with the side wall of the receiving groove 11 can be greater than the width of the protrusion 2 away from the junction with the side wall of the receiving groove 11. Alternatively, as Figure 6 As shown, in the cross section of the box body 1 along the depth direction perpendicular to the accommodating groove 11, the width Wa of the protrusion 2 at the junction with the side wall of the accommodating groove 11 may be smaller than the width Wb of the protrusion 2 away from the junction with the side wall of the accommodating groove 11.

[0068] Among them, the width of the protrusion 2 can be 0.5 mm, 2.6 mm or 3 mm, which is not specifically limited here. When the width of the protrusion 2 is 0.5 mm, it can increase the connection area between the box body 1 and the filler 5 while reducing the occupancy of the connection end of the protrusion 2 on the surface of the box body 1. At the same time, it also reduces the situation where the protrusion 2 punctures the filler 5 and the battery module 4 under the action of external force impact, thereby improving the safety of the battery box. When the width of the protrusion 2 is 2.6 mm, the connection area between the box body 1 and the filler 5 can be further increased, and the protrusion 2 is easy to process, while increasing the connection area, taking into account the processing convenience and safety of use of the box body 1. When the width of the protrusion 2 is 3 mm, the connection area between the box body 1 and the filler 5 can be greatly increased.

[0069] Optionally, the pitch between two adjacent protrusions 2 ranges from 5 mm to 20 mm, wherein the pitch between two adjacent protrusions 2 can be 5 mm, 10 mm, 17 mm, or 20 mm, and is not specifically limited herein. When the pitch between two adjacent protrusions 2 is 5 mm, the protrusions 2 can be densely arranged, greatly increasing the connection area between the box body 1 and the filler 5. The height of the protrusions 2 needs to be adaptively designed to be smaller, and the width of the protrusions 2 needs to be adaptively designed to be larger to avoid the protrusions 2 being too sharp, so as to increase the connection area while taking into account the safety of the battery box.

[0070] When the pitch between two adjacent protrusions 2 is 10 mm, the pitch is moderate and easy to process. When the pitch between two adjacent protrusions 2 is 17 mm, the height and width of the protrusions 2 can be designed to be larger, increasing the connection area while improving the interposition connection effect between the protrusions 2 and the filler 5, and making processing easier. When the pitch between two adjacent protrusions 2 is 20 mm, it is convenient to process in a variety of ways, and the protrusions 2 can be designed into a variety of different cross-sectional shapes.

[0071] like Figures 4 and 5 As shown, H2 shown in the figure is a schematic diagram of the raised height of the recessed portion 3, W2 is a schematic diagram of the width of the recessed portion 3, and L2 is a schematic diagram of the pitch between two adjacent recessed portions 3. In some embodiments, the range of the depth of the recessed portion 3 is 1 mm-10 mm, wherein the depth of the recessed portion 3 can be 1 mm, 7 mm or 10 mm, which is not specifically limited here. When the depth of the recessed portion 3 is 1 mm, the thinning effect on the wall thickness of the box body 1 is reduced, and the rigidity of the box body 1 itself is maintained while increasing the connection area. When the depth of the recessed portion 3 is 7 mm, the intervention connection effect of the recessed portion 3 and the filler 5 can be improved while further increasing the connection area, and the processing convenience can be taken into account. When the depth of the recessed portion 3 is 10 mm, the intervention connection effect of the box body 1 and the filler 5 can be greatly improved, and processing is convenient.

[0072] Optionally, the width of the recessed portion 3 ranges from 2 mm to 50 mm. The width of the recessed portion 3 refers to the outline dimension of the recessed portion 3 in the circumferential direction of the receiving groove 11 in the cross section of the box body 1 perpendicular to the depth direction of the receiving groove 11. At different recessed depths of the recessed portion 3, the width of the recessed portion 3 may be the same or different. For example, Figure 5 As shown, in the cross section of the box body 1 along the depth direction perpendicular to the accommodating groove 11, the width of the recessed portion 3 at the junction with the side wall of the accommodating groove 11 may be greater than the width of the recessed portion 3 away from the junction with the side wall of the accommodating groove 11.

[0073] The width of the recessed portion 3 can be 2 mm, 10 mm, or 50 mm, without specific limitation. When the width of the recessed portion 3 is 2 mm, the connection area is increased to a certain extent while reducing the impact on the rigidity of the box body 1. When the width of the recessed portion 3 is 10 mm, while further increasing the connection area, the mutual intervention connection effect between the box body 1 and the filler 5 is improved while taking into account the processing convenience. When the width of the recessed portion 3 is 50 mm, the connection area between the box body 1 and the filler 5 can be greatly increased.

[0074] Optionally, the pitch between two adjacent recesses 3 ranges from 5 mm to 50 mm, wherein the pitch between two adjacent recesses 3 can be 5 mm, 17 mm, or 50 mm, and is not specifically limited herein. When the pitch between two adjacent recesses 3 is 5 mm, the multiple recesses 3 are densely arranged, which can significantly increase the connection area between the box body 1 and the filler 5.

[0075] When the pitch between two adjacent recesses 3 is 17 mm, the pitch is moderate, and the recessed depth and width of the recessed portion 3 can be designed to be larger, thereby increasing the connection area and improving the intervening connection effect between the box body 1 and the filler 5, and facilitating processing. When the pitch between two adjacent recessed portions 3 is 50 mm, it is convenient to process in a variety of ways, and the recessed portion 3 can be designed into a variety of different cross-sectional shapes.

[0076] Comparison table of connection areas between the raised part and the filler and between the recessed part and the filler

[0077]

[0078] It can be seen from the comparison table of the connection areas between the protrusion and the filler and the recessed portion and the filler that when the width of the protrusion 2 is designed to be 2.6 mm, the protrusion height of the protrusion 2 is designed to be 2.6 mm, and the pitch between two adjacent protrusions 2 is designed to be 17 mm, the connection area between the box body 1 and the filler 5 after the protrusion 2 is designed will increase by 20.7% compared to the connection area between the box body 1 and the filler 5 when no protrusion 2 is provided.

[0079] When the width of the recessed portion 3 is designed to be 10 mm, the recessed depth of the recessed portion 3 is designed to be 7 mm, and the pitch between two adjacent recessed portions 3 is designed to be 17 mm, the connection area between the box body 1 and the filler 5 after the recessed portion 3 is designed will increase by 61.5% compared to the connection area between the box body 1 and the filler 5 when no raised portion 2 is provided. Both schemes can effectively increase the connection area between the box body 1 and the filler 5, improve the connection effect, and reduce the debonding of the two.

[0080] See Figures 3 to 6As shown, in some embodiments, the joints between the raised portion 2 and / or the recessed portion 3 and the sidewalls of the receiving groove 11 are integrally formed and have a smooth curved transition, thereby reducing sharp corners or edges formed at the joints, reducing stress concentration, and reducing stress damage to the battery module 4. The surfaces of the raised portion 2 and / or the recessed portion 3 have corners, which have a smooth curved transition to reduce the risk of puncture of the filler 5 or the battery module 4 under external impact, thereby improving the safety of the battery module 4.

[0081] See Figure 6 As shown, in some embodiments, the profile of the protrusion 2 near the bottom wall of the receiving groove 11 is smaller than the profile near the notch of the receiving groove 11, and / or the profile of the base of the protrusion 2 at the junction with the side wall of the receiving groove 11 is smaller than the profile of the top away from the junction with the side wall of the receiving groove 11. When the filler 5 is filled, the filler 5 can abut against the wall of the protrusion 2, and the wall of the protrusion 2 near the notch of the receiving groove 11 or the top wall away from the junction with the side wall of the receiving groove 11 can limit the filler 5, thereby increasing the stability of the connection between the protrusion 2 and the filler 5.

[0082] In some embodiments, the outline dimension of the recessed portion 3 near the bottom wall of the receiving groove 11 is larger than the outline dimension near the notch of the receiving groove 11, and / or the outline dimension of the recessed portion 3 at the junction with the side wall of the receiving groove 11 is larger than the outline dimension of the recessed portion 3 away from the junction with the side wall of the receiving groove 11. When the filling member 5 is filled, the filling member 5 can abut against the wall surface of the recessed portion 3, and the wall surface of the recessed portion 3 away from the junction with the side wall of the receiving groove 11 or the wall surface away from the junction with the side wall of the receiving groove 11 can limit the filling member 5, thereby increasing the connection stability between the recessed portion 3 and the filling member 5 and reducing the possibility of separation between the recessed portion 3 and the filling member 5.

[0083] For example, the elongated structure has a first side wall and a second side wall that are arranged opposite to each other. The first side wall of the elongated structure is connected to the side wall of the receiving groove 11. In the cross section of the elongated structure, the second side wall of the elongated structure is away from the side wall of the receiving groove 11, and the width of the second side wall of the elongated structure is greater than the width of the first side wall of the elongated structure. The elongated structure extends along the depth direction of the receiving groove 11. The elongated structure has a first end and a second end that are arranged opposite to each other. In the longitudinal section of the elongated structure, the first end of the elongated structure is close to the notch, and the second end of the elongated structure is close to the bottom wall. The protruding height or recessed depth of the elongated structure at the first end is greater than the protruding height or recessed depth of the elongated structure at the second end, so that the elongated structure forms a wedge-shaped structure with a larger top and a smaller bottom, thereby limiting the elongated structure at multiple angles.

[0084] See Figures 2 to 4As shown, an embodiment of the second aspect of the present invention provides a power battery assembly, including a battery module 4, and also including a battery case according to any of the above-mentioned solutions, wherein the battery module 4 is disposed in a receiving groove 11, and a filler 5 is disposed between the battery module 4 and the side wall of the receiving groove 11, and the protrusions 2 and / or the recesses 3 are both connected to the filler 5. When the filler 5 is filled between the battery module 4 and the side wall of the receiving groove 11, the multiple protrusions 2 and the multiple recesses 3 can not only increase the connection area between the inner wall of the box body 1 and the filler 5, but also enable the multiple protrusions 2 and the multiple recesses 3 to form an intervention-type connection structure such as plug-in or snap-on with the filler 5, thereby improving the connection stability between the box body 1 and the filler 5 and reducing the situation where the box body 1 and the filler 5 are easily debonded or separated under vibration conditions.

[0085] In some embodiments, multiple ribs and / or multiple grooves are arranged at intervals on the side walls of the battery module 4, and the multiple ribs and / or multiple grooves are all connected to the filler 5, that is, the connection area between the battery module 4 and the filler 5 can be increased by setting multiple ribs and / or multiple grooves, and the multiple ribs and / or multiple grooves can also form an interventional connection structure such as plug-in or clip-on with the filler 5, thereby improving the connection stability between the battery module 4 and the filler 5 and reducing the debonding or separation between the battery module 4 and the filler 5 under vibration conditions.

[0086] It should be noted here that the structure of the multiple ribs is similar to the structure and layout of the multiple protrusions 2, and the structure and layout of the multiple grooves and the multiple recessed portions 3, and will not be repeated here. The structure of the multiple ribs and the multiple protrusions 2 can improve the connection stability between the battery module 4 and the filling member 5, and can also improve the safety of the battery module 4 and facilitate processing.

[0087] A third aspect of the present invention provides a vehicle comprising a vehicle body and a power battery assembly according to any of the aforementioned embodiments, wherein the power battery assembly is disposed on the vehicle body, and the vehicle body provides support for the power battery assembly. Due to the inclusion of the aforementioned power battery assembly, the vehicle according to this embodiment of the present invention has all the advantages and benefits of the aforementioned embodiments, which will not be further elaborated here.

[0088] In some embodiments, the vehicle is an electric vehicle or a hybrid vehicle.

[0089] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A battery box, characterized in that: include: The box body (1) has a receiving groove (11); A plurality of raised portions (2) and / or a plurality of recessed portions (3), wherein the raised portions (2) and / or the recessed portions (3) are all arranged on the side wall of the accommodating groove (11), and the plurality of raised portions (2) and / or the plurality of recessed portions (3) are arranged at intervals on the side wall of the accommodating groove (11).

2. The battery box according to claim 1, characterized in that: The arrangement direction of the plurality of protrusions (2) is the depth direction of the accommodating groove (11), and / or, the arrangement direction of the plurality of protrusions (2) is the circumferential direction of the accommodating groove (11); and / or, The arrangement direction of the plurality of recessed portions (3) is the depth direction of the accommodating groove (11), and / or the arrangement direction of the plurality of recessed portions (3) is the circumferential direction of the accommodating groove (11).

3. The battery box according to claim 2, characterized in that: The raised portion (2) and / or the recessed portion (3) are of an elongated strip structure.

4. The battery box according to claim 3, characterized in that: The height of the protrusion (2) is in the range of 0.5 mm to 3 mm; and / or, The width of the protrusion (2) ranges from 0.5 mm to 3 mm; and / or, The pitch between two adjacent protrusions (2) ranges from 5 mm to 20 mm.

5. The battery box according to claim 3, characterized in that: The depth of the concave portion (3) ranges from 1 mm to 10 mm; and / or, The width of the recessed portion (3) ranges from 2 mm to 50 mm; and / or, The pitch between two adjacent recessed portions (3) ranges from 5 mm to 50 mm.

6. The battery case according to any one of claims 1 to 5, characterized in that: The joints between the raised portion (2) and / or the recessed portion (3) and the side walls of the accommodating groove (11) are integrally formed and have a smooth curved surface transition.

7. The battery case according to any one of claims 1 to 5, characterized in that: The outline size of the protrusion (2) near the bottom wall of the receiving groove (11) is smaller than the outline size near the notch of the receiving groove (11), and / or the outline size of the root of the protrusion (2) at the junction with the side wall of the receiving groove (11) is smaller than the outline size of the top away from the junction with the side wall of the receiving groove (11); and / or, The outline dimension of the recessed portion (3) near the bottom wall of the receiving groove (11) is larger than the outline dimension near the notch of the receiving groove (11), and / or the outline dimension of the recessed portion (3) at the junction with the side wall of the receiving groove (11) is larger than the outline dimension of the recessed portion (3) away from the junction with the side wall of the receiving groove (11).

8. A power battery assembly, comprising a battery module (4), characterized in that: The power battery assembly further comprises a battery case according to any one of claims 1 to 7, wherein the battery module (4) is arranged in the accommodating groove (11), a filling member (5) is provided between the battery module (4) and the side wall of the accommodating groove (11), and the protrusion (2) and / or the recessed portion (3) are both connected to the filling member (5).

9. The power battery assembly according to claim 8, characterized in that: A plurality of convex ribs and / or a plurality of grooves are arranged at intervals on the side wall of the battery module (4), and the plurality of convex ribs and / or the plurality of grooves are all connected to the filling member (5).

10. A vehicle, characterized in that: Including the power battery assembly according to claim 8 or 9.

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