Battery pack and vehicle

Abstract

The application discloses a battery pack and a vehicle, the battery pack comprising: a battery pack and a shell; the shell is enclosed to form a first accommodating groove, and the battery pack is arranged in the first accommodating groove; a first filling cavity is arranged in the shell, the first filling cavity is arranged around the circumference of the battery pack, and the first filling cavity is filled with a buffer material. In this way, when the vehicle is subjected to a side collision, the collision energy first acts on the first filling cavity area of the shell, and the impact energy is effectively absorbed and dispersed through plastic deformation or elastic deformation of the buffer material, so that the collision energy directly transmitted to the battery pack is reduced, thereby avoiding damage to the battery pack caused by side impact. That is, the shell side strength and rigidity are enhanced by the buffer material.

Description

Technical Field

[0001] This application belongs to the field of power battery technology, specifically relating to a battery pack and a vehicle. Background Technology

[0002] Electric vehicles are primarily powered by battery systems, with the battery pack being the core component of these systems. Its main function is to house and protect the battery packs. Battery pack technology is a crucial factor in the development of electric vehicles.

[0003] The battery pack includes a lower housing and a top cover. The lower housing has a cavity in which the battery pack is housed, and the top cover is located at the opening of the cavity. The lower housing provides necessary mechanical support for the battery pack, ensuring the stability of the battery operation during vehicle operation. In the event of a side collision, the lateral strength of the lower housing in the relevant technology is insufficient, failing to effectively resist side impacts, thus leading to damage to the battery pack. Utility Model Content

[0004] This application aims to provide a battery pack and vehicle that can solve the problem of insufficient lateral strength of the lower housing in related technologies, which makes it unable to effectively resist side collisions.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] In a first aspect, embodiments of this application provide a battery pack, comprising: a battery pack and a housing; the housing encloses a first receiving groove, the battery pack being disposed in the first receiving groove; the housing has a first filling cavity, the first filling cavity being arranged circumferentially around the battery pack, and the first filling cavity being filled with a cushioning material.

[0007] Optionally, the height direction of the battery pack is a first direction, and a second filling cavity is provided in the bottom wall of the housing along the first direction, and the second filling cavity is filled with cushioning material.

[0008] Optionally, the first filling cavity and the second filling cavity are connected.

[0009] Optionally, the housing includes a first liner and a second liner; the first liner is disposed around the periphery of the battery pack, the first liner has a first receiving groove, and the battery pack is disposed in the first receiving groove; the second liner is disposed around the first liner in the circumferential direction and connected to the first liner; along the circumferential direction of the first liner, a first gap is provided between the second liner and the first liner to form the first filling cavity.

[0010] Optionally, the first liner includes a first main body and a first edge, the first edge surrounding the circumferential edge of the first main body and connected to the first main body, and the first main body having a first receiving groove; the second liner includes a second main body and a second edge, the second edge surrounding the circumferential edge of the second main body and connected to the second main body, the second edge and the first edge being connected; the second main body having a second receiving groove, and the first main body being disposed within the second receiving groove; along the circumference of the first main body, a first gap is provided between the second main body and the first main body to form the first filling cavity.

[0011] Optionally, the second edge portion is provided with a plurality of protrusions; the plurality of protrusions are spaced apart; a groove is formed between adjacent protrusions, the plurality of protrusions and the plurality of grooves are arranged alternately at intervals, and the first edge portion is connected to the plurality of protrusions.

[0012] Optionally, the battery pack further includes a reinforcing member and a connecting member; the reinforcing member is disposed in the groove, and the connecting member passes through the first edge portion, the reinforcing member, and the second edge portion; one end of the connecting member is connected to the second edge portion, and the other end of the connecting member is used to connect to the vehicle body.

[0013] Optionally, the battery pack further includes a bottom protective plate; the bottom protective plate includes a side plate and a bottom plate, the bottom plate is disposed on the side of the housing opposite to the first receiving groove, the side plate is circumferentially arranged around the bottom plate and connected to the bottom plate, and the side plate covers the outer periphery of the housing.

[0014] Optionally, the battery pack further includes a buffer; a second gap exists between the base plate and the housing, the buffer is disposed in the second gap, one side of the buffer abuts against the base plate, and the other side of the buffer abuts against the housing.

[0015] Secondly, embodiments of this application provide a vehicle including the battery pack described in the above embodiments.

[0016] In this embodiment, a first receiving groove and a first filling cavity are provided in the housing. The battery pack is disposed in the first receiving groove, and the first filling cavity is arranged circumferentially around the battery pack and filled with cushioning material. Thus, when a side collision occurs, the impact energy first acts on the first filling cavity area of ​​the housing. Through the plastic deformation or elastic deformation of the cushioning material, the impact energy is effectively absorbed and dispersed, reducing the impact energy directly transmitted to the battery pack, thereby preventing damage to the battery pack from side impacts. In other words, this application enhances the strength and rigidity of the housing's sides through the cushioning material.

[0017] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of a battery pack according to an embodiment of this application;

[0020] Figure 2 This is an exploded view of a battery pack according to an embodiment of this application;

[0021] Figure 3 This is an exploded view of a portion of the structure of a battery pack according to an embodiment of this application;

[0022] Figure 4 yes Figure 1 A sectional view along line AA.

[0023] Figure label:

[0024] 1. Housing; 11. First liner; 111. First main body; 112. First edge; 113. First receiving groove; 12. Second liner; 121. Second main body; 122. Second edge; 122a. Protrusion; 122b. Groove; 123. Second receiving groove; 2. Battery pack; 3. Buffer material; 4. First filling cavity; 5. Second filling cavity; 6. Reinforcing member; 7. Bottom guard plate; 71. Side plate; 72. Bottom plate; 8. Buffer member; 9. Top cover; Z, First direction; Y, Second direction; X, Third direction. Detailed Implementation

[0025] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0026] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0027] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0028] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0029] The battery pack and vehicle provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0030] like Figures 1 to 4 As shown in the embodiment of this application, a battery pack is proposed, including: a battery pack 2 and a housing 1; the housing 1 is enclosed to form a first receiving groove 113, and the battery pack 2 is disposed in the first receiving groove 113; the housing 1 is provided with a first filling cavity 4, which is arranged around the circumference of the battery pack 2, and the first filling cavity 4 is filled with a cushioning material 3.

[0031] In this embodiment, by providing a first receiving groove 113 and a first filling cavity 4 in the housing 1, the battery pack 2 is disposed in the first receiving groove 113, and the first filling cavity 4 is arranged circumferentially around the battery pack 2, and is filled with cushioning material 3. Thus, when a side collision occurs, the collision energy first acts on the area of ​​the first filling cavity 4 of the housing 1, and through the plastic deformation or elastic deformation of the cushioning material 3, the impact energy is effectively absorbed and dispersed, reducing the collision energy directly transmitted to the battery pack 2, thereby preventing damage to the battery pack 2 from side impacts. In other words, this application enhances the strength and rigidity of the side of the housing 1 through the cushioning material 3.

[0032] In some embodiments, the buffer material 3 can be a material with high energy absorption properties, such as polymer foam, buffer adhesive, rubber, or silicone; in addition, the buffer material 3 has a porous structure. This allows for the absorption of impact energy through the deformation of the porous structure, and the buffer material 3 can enhance the structural strength of the shell 1, thereby improving the impact resistance of the shell 1. Simultaneously, the porous structure in the buffer material 3 can reduce its weight, achieving a lightweight design for the shell 1. Furthermore, when a side collision occurs, the porous structure can buffer stress, improving the side impact resistance of the shell 1. The shape of the porous structure can be circular, polygonal, or irregular, etc., and is not limited thereto.

[0033] For example, the buffer material 3 can be a fluid buffer adhesive. An adhesive filling port is provided on the side wall of the shell 1. The adhesive filling port is connected to the first filling cavity 4. The buffer adhesive is poured into the first filling cavity 4 through the adhesive filling port. After the buffer adhesive cures, a solid buffer layer is formed. The structural strength of the shell 1 is improved through the buffer layer.

[0034] In some embodiments, the battery pack 2 includes multiple battery cells, which can be connected in series, parallel, or a combination thereof. A combination thereof means that some battery cells are connected in series while others are connected in parallel. The multiple battery cells can be directly connected in series, parallel, or a combination thereof, and then the entire assembly of the multiple battery cells is housed within the housing 1. Alternatively, the battery pack 2 can also be composed of multiple battery cells first connected in series, parallel, or a combination thereof to form battery pack 2 modules, and then these modules are connected in series, parallel, or a combination thereof to form a whole, which is then housed within the housing 1. The battery pack 2 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells.

[0035] Each battery cell can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell can be cylindrical, flat, cuboid, or other shapes.

[0036] In some embodiments, the battery pack further includes a top cover 9, which covers the opening of the first receiving groove 113 and is connected to the edge of the housing 1. This allows the top cover 9 and the housing 1 to define a sealed installation space so that the battery pack 2 can be installed in the installation space, thereby making the top cover 9 and the housing 1 together constitute the outer shell of the battery pack 2.

[0037] In other embodiments, potting compound can be filled into the first receiving groove 113 to protect the battery pack 2 from external environmental influences (such as humidity, dust, chemical corrosion, etc.), while improving thermal management efficiency and enhancing structural strength and vibration resistance. The potting compound has excellent insulation, water resistance, chemical resistance, and a certain degree of elasticity, which can effectively wrap and protect sensitive components inside the battery pack 2.

[0038] Optionally, such as Figure 4 As shown, the height direction of the battery pack is the first direction Z. A second filling cavity 5 is provided in the bottom wall of the housing 1 along the first direction Z. The second filling cavity 5 is filled with cushioning material 3.

[0039] In this embodiment, a second filling cavity 5 is provided in the bottom wall of the housing 1 along the Z side of the first direction, and a buffer material 3 is filled in the second filling cavity 5. In this way, when the bottom of the vehicle collides, the collision energy first acts on the area of ​​the second filling cavity 5 of the housing 1, and the impact energy is effectively absorbed and dispersed through the plastic deformation or elastic deformation of the buffer material 3, reducing the collision energy directly transmitted to the battery pack 2, thereby avoiding damage to the battery pack 2 due to bottom impact.

[0040] Specifically, the battery pack has mutually perpendicular length, height and width directions. The housing 1 and the top cover 9 are arranged opposite each other along the height direction. The size of the battery pack in the length direction is larger than the size in the width direction. Therefore, the height direction of the battery pack is set as the first direction Z, the width direction of the battery pack is set as the second direction Y, and the length direction of the battery pack is set as the third direction X.

[0041] It should be noted that the buffer material 3 disposed in the second filling cavity 5 and the buffer material 3 disposed in the first filling cavity 4 can be the same or different. Those skilled in the art can choose according to actual needs, and the embodiments of this application do not limit this.

[0042] In practical applications, the impact force and frequency experienced at the bottom of the battery pack are greater than those experienced at the sides. Therefore, the density and strength of the buffer material 3 in the second filling cavity 5 can be set higher than those in the first filling cavity 4, so that the bottom structural strength of the housing 1 is greater than the side structural strength, thereby achieving a bottom structural strength greater than the side structural strength of the housing 1.

[0043] In some embodiments, different types of vehicles have different requirements for the weight and strength of the battery pack. This application can adjust the weight of the housing 1 according to the strength / density of the cushioning material 3, so that the overall strength of the housing 1 is adjustable, thereby adapting to the weight and strength requirements of the battery pack and meeting the requirements of different vehicles for the battery pack.

[0044] It should be noted that the boundary between the first filling cavity 4 and the second filling cavity 5 is as follows: Figure 4 As shown by the dotted lines on the left and right sides, the bottom wall is positioned opposite to the opening of the first receiving groove 113, and the bottom wall is used to support the battery pack 2.

[0045] Optionally, such as Figure 4As shown, the first filling cavity 4 and the second filling cavity 5 are connected.

[0046] In this embodiment, the first filling cavity 4 and the second filling cavity 5 are connected. This allows the first filling cavity 4 and the second filling cavity 5 to be filled simultaneously when the buffer material 3 is being filled, thereby improving the filling efficiency of the buffer material 3.

[0047] Optionally, such as Figure 2 and Figure 3 As shown, the housing 1 includes a first liner 11 and a second liner 12; the first liner 11 is arranged around the battery pack 2, and the first liner 11 is provided with a first receiving groove 113, in which the battery pack 2 is disposed; the second liner 12 is arranged around the first liner 11 in the circumferential direction and is connected to the first liner 11; along the circumferential direction of the first liner 11, a first gap is provided between the second liner 12 and the first liner 11 to form a first filling cavity 4.

[0048] In this embodiment, the housing 1 is configured as a first liner 11 and a second liner 12. The first liner 11 surrounds the battery pack 2, and the second liner 12 surrounds and connects to the first liner 11. A first gap is formed between the second liner 12 and the first liner 11 along the circumference of the first liner 11 to form a first filling cavity 4. This allows the first liner 11 and the second liner 12 to be processed separately using sheet metal techniques. Compared to a one-piece housing 1, this separate processing reduces structural complexity, thereby lowering production costs and difficulty. Furthermore, by filling the space between the first liner 11 and the second liner 12 with cushioning material, the housing 1 forms a sandwich-like structure, significantly improving its strength. Additionally, the first liner 11 and the second liner 12 are detachably connected (e.g., by bolts, clips, or welding), allowing the cushioning material 3 to be filled or replaced independently before the first liner 11 and the second liner 12 are assembled, solving the problem of difficult maintenance of a one-piece housing 1.

[0049] It should be noted that "circumferential" in the context of the first liner 11 refers to the length and width directions of the first liner 11, which are the same as the length and width directions of the battery pack. The first filling cavity 4 refers to a first gap existing between the first liner 11 and the second liner 12 along at least one of the second direction Y and the third direction X to form a first buffer cavity. Of course, a third gap exists between the first liner 11 and the second liner 12 along the third direction X to form a second filling cavity 5.

[0050] It should be noted that the materials of the first liner 11 and the second liner 12 can be at least one of steel, aluminum, steel-aluminum alloy, and composite materials.

[0051] Optionally, such as Figure 3As shown, the first liner 11 includes a first main body 111 and a first edge 112. The first edge 112 is disposed around the circumferential edge of the first main body 111 and connected to the first main body 111. The first main body 111 has a first receiving groove 113. The second liner 12 includes a second main body 121 and a second edge 122. The second edge 122 is disposed around the circumferential edge of the second main body 121 and connected to the second main body 121. The second edge 122 and the first edge 112 are connected. The second main body 121 has a second receiving groove 123. The first main body 111 is disposed in the second receiving groove 123. Along the circumference of the first main body 111, a first gap is provided between the second main body 121 and the first main body 111 to form a first filling cavity 4.

[0052] In this embodiment, the first liner 11 is configured as a first main body 111 and a first edge 112, with the first edge 112 surrounding the circumferential edge of the first main body 111 and connected to it. The second liner 12 is configured as a second main body 121 and a second edge 122, with the second edge 122 surrounding the circumferential edge of the second main body 121 and connected to it. The second edge 122 is connected to the first edge 112. This facilitates connection to the vehicle body via the first edge 112 and the second edge 122, avoiding the difficulty in connecting the basin-shaped shell 1 and the side beam due to differences in manufacturing processes and materials in the prior art, thus reducing manufacturing difficulty and production costs.

[0053] Specifically, existing battery packs use a basin-shaped shell 1 and profiled side beams as frames, connected by fasteners or adhesive to improve the strength of the basin-shaped shell 1. However, because the profiled side beams are manufactured using an extrusion process while the basin-shaped shell 1 is manufactured using a stamping process, the processes for the basin-shaped shell 1 and the side beams differ, and they are made of different materials, making the connection between the basin-shaped shell 1 and the side beams difficult. In this embodiment, by integrally processing the first liner 11 and the second liner 12, the connection difficulties caused by different processes and materials are avoided, thereby reducing manufacturing difficulty and production costs.

[0054] Optionally, such as Figure 3 As shown, the second edge portion 122 is provided with a plurality of protrusions 122a; the plurality of protrusions 122a are spaced apart; a groove 122b is formed between adjacent protrusions 122a, the plurality of protrusions 122a and the plurality of grooves 122b are arranged alternately at intervals, and the first edge portion 112 is connected to the plurality of protrusions 122a.

[0055] In this embodiment, a plurality of protrusions 122a are provided on the second edge portion 122; the plurality of protrusions 122a are spaced apart; a groove 122b is formed between adjacent protrusions 122a; the plurality of protrusions 122a and the plurality of grooves 122b are arranged alternately at intervals; and the first edge portion 112 is connected to the plurality of protrusions 122a. This allows the gap between the first liner 11 and the second liner 12 along a third direction X to be controlled by the protrusions 122a, thereby facilitating the formation of the second filling cavity 5.

[0056] In some embodiments, a positioning groove may be provided at the position corresponding to the protrusion 122a on the first liner 11, with the protrusion 122a disposed in the positioning groove. In this way, the positioning between the first liner 11 and the second liner 12 is achieved through the cooperation between the protrusion 122a and the positioning groove, thereby facilitating the assembly of the two.

[0057] In some embodiments, the buffer material 3 can be filled in the following manner: for example, a certain amount of buffer material 3 is first filled into the second groove 122b of the second liner 12, and then the first liner 11 is placed in the second groove 122b. By applying pressure to the first liner 11, the filling material is forced to flow into the first filling cavity 4 until the buffer material 3 overflows from each groove 122b, thereby indicating that the first filling cavity 4 and the second filling cavity 5 are both filled with buffer material 3; if no buffer material 3 appears in the groove 122b, the buffer material 3 can continue to be filled into the groove 122b until the buffer material 3 overflows from the groove 122b.

[0058] Of course, some of the grooves 122b can be fitted with seals to prevent the cushioning material 3 from overflowing during filling; the other part of the grooves 122b can still be left unsealed for filling the cushioning material 3.

[0059] It should be noted that the spacing between the multiple protrusions 122a can be equal or unequal. Those skilled in the art can choose according to the actual situation, and the embodiments of this application do not limit this.

[0060] In some embodiments, the first edge portion 112 and the plurality of protrusions 122a may be connected by welding, bolting or bonding, and the embodiments of this application do not limit this.

[0061] Optionally, such as Figure 2 and Figure 3 As shown, the battery pack also includes a reinforcing member 6 and a connector; the reinforcing member 6 is disposed in the groove 122b, and the connector passes through the first edge portion 112, the reinforcing member 6 and the second edge portion 122; one end of the connector is connected to the second edge portion 122, and the other end of the connector is used to connect to the vehicle body.

[0062] In this embodiment, the reinforcing member 6 is disposed within the groove 122b, and the connector passes through the first edge portion 112, the reinforcing member 6, and the second edge portion 122. One end of the connector is connected to the second edge portion 122, and the other end of the connector is used to connect to the vehicle body. Thus, when the battery pack is connected to the vehicle body, the reinforcing member 6 can strengthen the battery pack at the groove 122b, preventing the battery pack from detaching due to insufficient connection strength.

[0063] Specifically, the reinforcing member 6 can be a sleeve, and the connecting members can be a screw and a nut. The two ends of the sleeve abut against the first edge portion 112 and the second edge portion 122, respectively. The screw passes through the first edge portion 112, the sleeve, and the second edge portion 122 in sequence. One end of the screw passing through the second edge portion 122 is threadedly connected to the nut, and the other end of the screw passing through the first edge portion 112 passes through the vehicle body and is threadedly connected to the nut. In this way, the connection between the battery pack and the vehicle body is achieved through the connection of the screw, nut, and sleeve. Furthermore, by placing the sleeve at the groove 122b, the space at the groove 122b can be utilized to reduce the size of the battery pack along the third direction X, thereby increasing the energy density of the battery pack.

[0064] Optionally, such as Figure 2 and Figure 3 As shown, the battery pack also includes a bottom protective plate 7; the bottom protective plate 7 includes a side plate 71 and a bottom plate 72. The bottom plate 72 is located on the side of the housing 1 away from the first receiving groove 113. The side plate 71 is arranged around the bottom plate 72 and connected to the bottom plate 72. The side plate 71 covers the outer periphery of the housing 1.

[0065] In this embodiment, by separating the side plate 71 of the bottom guard plate 7 from the side of the housing 1 opposite to the first receiving groove 113, the bottom structure strength of the housing 1 is enhanced by the bottom plate 72, preventing deformation of the bottom of the housing 1 from damaging the battery pack 2. Furthermore, the side plate 71 is arranged circumferentially around and connected to the bottom plate 72, covering the outer periphery of the housing 1. This allows the side plate 71 to form a protective structure for the second liner 12 of the housing 1. When a side collision occurs, the side plate 71 of the bottom guard plate 7 can absorb some of the side impact energy, improving the side impact capability of the housing 1.

[0066] In some embodiments, the side plate 71 and the housing 1 may be connected by welding, bolting or bonding, and this application embodiment does not limit this.

[0067] Optionally, such as Figure 2 and Figure 3 As shown, the battery pack also includes a buffer 8; there is a second gap between the base plate 72 and the housing 1, the buffer 8 is disposed in the second gap, one side of the buffer 8 abuts against the base plate 72, and the other side of the buffer 8 abuts against the housing 1.

[0068] In this embodiment, a buffer member 8 is provided between the base plate 72 and the housing 1, with one side of the buffer member 8 abutting against the base plate 72 and the other side of the buffer member 8 abutting against the housing 1. This allows the buffer member 8 to absorb the impact force on the bottom of the battery pack, further improving the bottom structural strength of the battery pack.

[0069] In some embodiments, multiple buffers 8 are provided, and the multiple buffers 8 are arranged at intervals. In this way, by providing multiple buffers 8, the impact force on the bottom of the battery pack can be absorbed evenly, preventing the bottom of the housing 1 from deforming.

[0070] In some embodiments, the buffer 8 may be made of materials such as silicone rubber, nitrile rubber, EPDM rubber, polyurethane foam, polyolefin closed-cell foam, melamine-formaldehyde resin foam, glass microbead-filled silicone, carbon nanotube-reinforced polyurethane and aramid fiber felt composite.

[0071] Optionally, embodiments of this application provide a vehicle including the battery pack described in the above embodiments.

[0072] In this embodiment, by providing a first receiving groove 113 and a first filling cavity 4 in the housing 1, the battery pack 2 is disposed in the first receiving groove 113, and the first filling cavity 4 is arranged circumferentially around the battery pack 2, and is filled with cushioning material 3. Thus, when a side collision occurs, the collision energy first acts on the area of ​​the first filling cavity 4 of the housing 1, and through the plastic deformation or elastic deformation of the cushioning material 3, the impact energy is effectively absorbed and dispersed, reducing the collision energy directly transmitted to the battery pack 2, thereby preventing damage to the battery pack 2 from side impacts. In other words, this application enhances the strength and rigidity of the side of the housing 1 through the cushioning material 3.

[0073] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0074] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that, include: Battery pack (2) and casing (1); The housing (1) encloses and forms a first receiving groove (113), and the battery pack (2) is disposed in the first receiving groove (113); The housing (1) is provided with a first filling cavity (4), which is arranged around the circumference of the battery pack (2), and the first filling cavity (4) is filled with a cushioning material (3).

2. The battery pack according to claim 1, characterized in that, The height direction of the battery pack is the first direction (Z), and a second filling cavity (5) is provided in the bottom wall of the housing (1) along the first direction (Z), and the second filling cavity (5) is filled with cushioning material (3).

3. The battery pack according to claim 2, characterized in that, The first filling cavity (4) and the second filling cavity (5) are connected.

4. The battery pack according to any one of claims 1-3, characterized in that, The housing (1) includes a first liner (11) and a second liner (12); The first liner (11) is arranged around the battery pack (2), and the first liner (11) is provided with the first receiving groove (113), and the battery pack (2) is disposed in the first receiving groove (113); the second liner (12) is arranged around the first liner (11) and connected to the first liner (11); Along the circumference of the first liner (11), a first gap is provided between the second liner (12) and the first liner (11) to form the first filling cavity (4).

5. The battery pack according to claim 4, characterized in that, The first liner (11) includes a first main body (111) and a first edge (112). The first edge (112) is disposed around the circumferential edge of the first main body (111) and connected to the first main body (111). The first main body (111) is provided with the first receiving groove (113). The second liner (12) includes a second main body (121) and a second edge (122). The second edge (122) is disposed around the circumferential edge of the second main body (121) and connected to the second main body (121). The second edge (122) is connected to the first edge (21). The second main body (121) is provided with a second receiving groove (123), and the first main body (111) is disposed in the second receiving groove (123). Along the circumferential direction of the first main body portion (111), the first gap is provided between the second main body portion (121) and the first main body portion (111) to form the first filling cavity (4).

6. The battery pack according to claim 5, characterized in that, The second edge portion (122) is provided with a plurality of protrusions (122a); The plurality of protrusions (122a) are spaced apart; a groove (122b) is formed between adjacent protrusions (122a), and the plurality of protrusions (122a) and the plurality of grooves (122b) are arranged alternately at intervals, and the first edge portion (112) is connected to the plurality of protrusions (122a).

7. The battery pack according to claim 6, characterized in that, The battery pack also includes a reinforcing member (6) and a connector; The reinforcing member (6) is disposed in the groove (122b), and the connecting member passes through the first edge portion (112), the reinforcing member (6) and the second edge portion (122); one end of the connecting member is connected to the second edge portion (122), and the other end of the connecting member is used to connect to the vehicle body.

8. The battery pack according to any one of claims 1-7, characterized in that, The battery pack also includes a bottom protective plate (7); The bottom protective plate (7) includes a side plate (71) and a bottom plate (72). The bottom plate (72) is located on the side of the housing (1) away from the first receiving groove (113). The side plate (71) is arranged around the bottom plate (72) and connected to the bottom plate (72). The side plate (71) covers the outer periphery of the housing (1).

9. The battery pack according to claim 8, characterized in that, The battery pack also includes a buffer (8); There is a second gap between the base plate (72) and the housing (1), and the buffer (8) is disposed in the second gap. One side of the buffer (8) abuts against the base plate (72), and the other side of the buffer (8) abuts against the housing (1).

10. A vehicle, characterized in that, Includes the battery pack as described in any one of claims 1-9 above.

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