Battery pack and vehicle

Abstract

A vehicle (1000) including a battery pack (100) is provided. The battery pack (100) includes a tray (20), a plurality of battery cells (23), a reinforcing member (30), and an insulating member (40). The tray (20) includes a bottom plate (22), a side beam (28), and at least one support beam (21), the bottom plate (22) and the side beam (28) enclose a housing cavity (27), and the support beam (21) is disposed within the housing cavity (27). The plurality of battery cells (23) are disposed within the tray (20). The reinforcing member (30) is disposed within the housing cavity (27), and is located at the bottom of the bottom plate (22). The reinforcing member (30) includes a plurality of reinforcing sections (31), which are spaced apart, and at least one reinforcing section (31) is located on the support beam (21) and extends below the battery cell (23). At least one thermal insulation projection (41) is disposed on the thermal insulation member (40), and the thermal insulation projection (41) is located in the gap between two adjacent reinforcing sections (31).

Description

Technical Field

[0001] Cross - reference to related applications This application claims priority to Chinese Patent Application No. 202321382565.1, titled "BATTERY PACK AND VEHICLE", filed with the China National Intellectual Property Administration on March 31, 2023, and the entire content thereof is incorporated herein by reference in its entirety.

[0002] This application relates to the field of battery technology, specifically to battery packs and vehicles.

Background Art

[0003] The power battery is a core component of an electric vehicle, and whether the power battery has sufficient structural strength has a significant impact on driving safety. In the prior art, the battery pack of the power battery includes an upper cover, battery cells, and a tray, and a plurality of battery cells are arranged between the upper cover and the tray. The upper cover is usually made of a plastic material or a thin - walled punched metal. After the upper cover is installed on the tray, the structural strength of the battery pack in the width direction of the tray is low, and the protection strength of the bottom of the battery pack is insufficient, which is likely to cause deformation of the battery pack under stress and low safety.

Summary of the Invention

[0004] This application aims to solve at least one of the technical problems existing in the prior art. Therefore, the first objective of this application is to provide a battery pack to effectively improve the structural strength and safety of the battery pack.

[0005] The second objective of this application is to provide a vehicle including the battery pack described in the foregoing embodiments.

[0006] A battery pack according to an embodiment of the first aspect of this application includes: a tray, a plurality of battery cells, a reinforcing member, and a thermal insulation member. The tray includes a bottom plate, a side beam, and at least one support beam, the bottom plate and side beam enclose a housing cavity, and the support beam is disposed within the housing cavity. The plurality of battery cells are disposed within the housing cavity. The reinforcing member is disposed at the bottom of the bottom plate and includes a plurality of reinforcing parts, the plurality of reinforcing parts are spaced apart, and at least one reinforcing part is located on the support beam and extends below the battery cells. At least one thermal insulation projection is disposed on the thermal insulation member and at least one thermal insulation projection is located between two adjacent reinforcing parts.

[0007] In this embodiment of the battery pack, support beams and reinforcing members are provided to protect the battery cells. In this way, the load-bearing capacity of the battery cells is effectively improved, further improving the vibration mode of the battery pack and the overall structural strength. Furthermore, thermal insulation members are provided to improve the cushioning and energy absorption effect of the bottom of the battery pack. In this way, the thermal insulation members work together with the support beams to jointly improve the capacity of the battery pack to resist external forces, thereby enabling the battery pack to adapt to various complex operating conditions. Furthermore, thermal insulation sections are provided to provide thermal insulation for the battery pack, improving the overall thermal insulation performance of the battery pack.

[0008] In some embodiments, multiple gaps are formed between multiple reinforcing portions, multiple thermal insulation protrusions are arranged on the surface of the thermal insulation member, and multiple thermal insulation protrusions are arranged in a one-to-one correspondence within the multiple gaps.

[0009] In some embodiments, the thermal insulation member further includes a flat plate portion and at least one thermal insulation projection, the thermal insulation projection being disposed on the surface of the flat plate portion, and the flat plate portion being disposed on the bottom of the thermal insulation projection and on the bottom of the reinforcing member.

[0010] In some embodiments, the tray includes a plurality of support beams, which are spaced apart in the longitudinal direction of the tray to divide the housing cavity into a plurality of sub-housing cavities, the plurality of battery cells are arranged in the width direction of the tray to form a battery group, the plurality of battery groups are arranged in the longitudinal direction of the tray, the plurality of battery groups are each disposed in at least a portion of the plurality of sub-housing cavities, and the reinforcing members are separately disposed on the plurality of support beams.

[0011] In some embodiments, the reinforcing member further includes a first joint and a second joint. The first joint is joined to one end of a plurality of reinforcing members, and the second joint is joined to the other end of the plurality of reinforcing members, the first joint includes at least one first joint section, and the second joint includes at least one second joint section.

[0012] In some embodiments, the longitudinal direction of the reinforcement is parallel to the width direction of the battery pack, and the longitudinal directions of the first joint and the second joint are parallel to the longitudinal direction of the battery pack.

[0013] In some embodiments, the bottom plate includes a heat exchange plate. Reinforcing members are provided at the bottom of the heat exchange plate.

[0014] In some embodiments, at least one support member is located at one end of a lateral beam and adjacent to the base plate, the support member extends toward the center of the base plate, and the base plate is positioned on the support member.

[0015] In some embodiments, the reinforcing member is welded to the lateral beam, and the side surface of the reinforcing member that faces the bottom plate is bonded to the bottom plate.

[0016] In some embodiments, the reinforcing member is an extruded aluminum profile.

[0017] In some embodiments, the top of the tray is open, the battery pack further includes an upper cover, the upper cover is disposed on the open side of the tray, and at least one reinforcing plate is disposed on the top of the upper cover.

[0018] In some embodiments, two reinforcing plates are arranged on the upper cover, spaced apart in the width direction of the tray, positioned on both side edges of the tray in the width direction, and extending in the length direction of the tray.

[0019] In some embodiments, the reinforcing plate is a steel plate.

[0020] In some embodiments, the battery pack further includes an upper cover, which is disposed on the open side of the tray, and the upper cover includes a steel plate and an insulating plate, which is disposed on the side of the steel plate and adjacent to the housing cavity.

[0021] In some embodiments, the insulating board is a fiberglass board.

[0022] In some embodiments, the top of the tray is open, the battery pack further includes an upper cover, the upper cover is disposed on the open side of the tray, an access port is provided on the upper cover, and a removable access cover is disposed over the access port.

[0023] In some embodiments, the power distribution module is housed within a housing cavity, and the access port and the power distribution module are arranged in correspondence.

[0024] In some embodiments, the sealing member is disposed between the access cover and the upper cover, and the sealing member is disposed around the access port.

[0025] In some embodiments, the access port is disposed at the edge of the upper cover, and a flange for shielding the sealing member is provided on the side of the access cover and on the side away from the center of the upper cover.

[0026] In some embodiments, the battery pack further includes an insulating layer. The insulating layer is disposed on the inner wall surface of the tray and on the inner wall surface facing the accommodation cavity.

[0027] In some embodiments, the battery pack further includes a protection plate. The protection plate is disposed at the bottom of the heat insulating member.

[0028] In some embodiments, the length direction of the support beam is parallel to the width direction of the battery pack, and the length direction of the battery cell is parallel to the length direction of the battery pack.

[0029] In some embodiments, the reinforcing portion extends to a position below one end of the battery cell in the length direction.

[0030] In some embodiments, the battery post is disposed at one end of the battery cell in the length direction.

[0031] In some embodiments, the plurality of reinforcing portions are spaced apart in the length direction of the tray.

[0032] A vehicle according to an embodiment of the second aspect of the present application includes the battery pack of the foregoing embodiment of the first aspect of the present application.

[0033] Additional aspects and advantages of the present application are partially described in the following description, partially become apparent in the following description, or are learned through the practice of the present application.

[0034] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood in conjunction with the description of the embodiments with reference to the following drawings.

Brief Description of the Drawings

[0035] [Figure 1] This is an exploded view of a battery pack according to an embodiment of the present application. [Figure 2] This is a cross-sectional view of a battery pack according to an embodiment of the present application. [Figure 3] This is a bottom view of the reinforcing member according to an embodiment of this application. [Figure 4] This is a top view of the upper cover according to an embodiment of the present application. [Figure 5] This is a diagram of a tray according to an embodiment of the present application. [Figure 6] This is a diagram of a vehicle according to an embodiment of the present application. [Explanation of symbols]

[0036] 1000 vehicles 100 Battery Packs 10 Top cover 11 Access Ports 12 Access Cover 13 Flange 14 Sealing member 15 Reinforcement plate 20 trays 21 Support beam 22 Bottom plate 23 battery cells 24 Power Distribution Modules 25 Heat exchange plate 26 Insulating layer 27 Containment Cavity 28 Side beams 30 Reinforcement members 31 Reinforcement section 32 First joint 321 First connecting section 33 Second joint 331 Second connecting section 40 Insulation material 41 Insulated protrusion 42 Flat plate part 50 Protection plate A Width direction B Length direction C Height direction [Modes for carrying out the invention]

[0037] Embodiments of this application are described in detail below. Embodiments described with reference to the attached drawings are examples. A battery pack 100 according to an embodiment of this application is described below with reference to Figures 1 to 5. The battery pack 100 includes: a tray 20, a plurality of battery cells 23, a reinforcing member 30, and a heat insulating member 40.

[0038] Specifically, as shown in Figures 1 to 5, the tray 20 includes a bottom plate 22, side beams 28, and at least one support beam 21. The bottom plate 22 and side beams 28 surround a housing cavity 27 suitable for housing batteries, the support beam 21 is disposed within the housing cavity 27, and a plurality of battery cells 23 are disposed within the housing cavity 27. The end portions of the plurality of battery cells 23 face the support beam 21. A reinforcing member 30 is disposed at the bottom of the bottom plate 22, and the reinforcing member 30 includes a plurality of reinforcing parts 31, which are spaced apart. At least one reinforcing part 31 is positioned on the support beam 21 and extends below the end portions of the plurality of battery cells 23. An insulating member 40 is disposed on the side of the reinforcing member 30 in the height direction C of the battery pack 100, and at least one insulating projection 41 is disposed on the surface of the insulating member 40, and at least one insulating projection 41 is positioned between two adjacent reinforcing parts 31.

[0039] Referring to Figures 1, 3, and 5, the bottom plate 22 is positioned at the bottom of the lateral beams 28, which are positioned perpendicular to the bottom plate 22 and are positioned around the bottom plate 22 to form an open housing cavity 27. The support beams 21 extend in the width direction A of the battery pack 100 and support the battery pack 100 in the height direction C. Multiple battery cells 23 extend in the length direction B of the battery pack 100 and are arranged sequentially in the width direction A of the battery pack 100. When the battery cells 23 are installed in the battery pack 100, both ends of the battery cells 23 in the length direction B of the battery pack 100 are positioned opposite the support beams 21. The reinforcing member 30 is disposed at the bottom of the base plate 22 in the height direction C of the battery pack 100, and the reinforcing portion 31 extends in the width direction A of the battery pack 100 and faces the support beam 21 in the height direction C of the battery pack 100. The battery cells 23 are in contact with the base plate 22, and the reinforcing portion 31 supports the support beam 21 and the plurality of battery cells 23 at the bottom of the base plate 22. The heat insulating member 40 is disposed below the reinforcing member 30 in the height direction C of the battery pack 100, and at least one heat insulating projection 41 is disposed on the side surface of the heat insulating member 40 and on the surface facing the base plate 22, and the heat insulating projection 41 is positioned between two adjacent reinforcing portions 31.

[0040] The arrangement of at least one thermal insulation projection 41 between two adjacent reinforcing portions 31 can be understood as, when multiple thermal insulation projections 41 are arranged on the thermal insulation member 40, one or more thermal insulation projections 41 are arranged between two adjacent reinforcing portions 31, and when one thermal insulation projection 41 is arranged on the thermal insulation member 40, the thermal insulation projection 41 is arranged between two adjacent reinforcing portions 31.

[0041] The fact that the thermal insulation projection 41 is positioned between two adjacent reinforcing sections 31 (in the gap) does not mean that the dimensions of a single thermal insulation projection 41 must be less than or equal to the gap between the two adjacent reinforcing sections 31. The dimensions of a single thermal insulation projection 41 may be less than or equal to the gap between the two adjacent reinforcing sections 31, or may be slightly larger (e.g., slightly taller) than the gap between the two adjacent reinforcing sections 31.

[0042] According to the battery pack 100 in this embodiment, the reinforcing member 30 is disposed at the bottom of the bottom plate 22, and the support beam 21 is disposed opposite the reinforcing member 31, thereby effectively improving the structural strength of the tray 20. The side surface of the reinforcing member 31 extends below the end portions of the multiple battery cells 23, and the reinforcing member 31 is positioned in the region of maximum stress on the battery cells 23, effectively improving the stress strength of the end portions of the battery cells 23 in the longitudinal direction B, thereby improving protection for the battery cells 23 and improving the vibration pattern of the battery pack 100. Furthermore, the heat insulating member 40 is usually a porous structure with specific compression performance, and the heat insulating member 40 plays a role in buffering and energy absorption for the battery pack 100 from the bottom of the battery pack 100, thereby allowing the reinforcing member 30 and the heat insulating member 40 to jointly improve the capacity of the battery pack 100 to withstand external forces. In addition, gaps are provided between the reinforcing members 31, thereby ensuring strength when weight is reduced. The heat insulating protrusion 41 is positioned between adjacent reinforcing parts 31, thereby filling the gap between the reinforcing parts 31 to some extent and making it easier to fix the reinforcing member 30, the heat insulating member 40, and the bottom plate 22 together. Furthermore, the heat insulating member 40 is positioned to perform a heat insulating function for the battery pack 100, improving the overall heat insulating performance of the battery pack 100.

[0043] According to the battery pack 100 of this embodiment, as shown in Figures 1 and 2, a plurality of gaps are formed between a plurality of reinforcing portions 31, a plurality of heat insulating protrusions 41 are arranged on the surface of the heat insulating member 40, and the plurality of heat insulating protrusions 41 are arranged in a one-to-one correspondence within the plurality of gaps. The plurality of reinforcing portions 31 are spaced apart in the longitudinal direction B of the battery pack 100, gaps are formed between adjacent reinforcing portions 31, the plurality of heat insulating protrusions 41 extend in the longitudinal direction B of the battery pack 100, and the heat insulating protrusions 41 are arranged within the gaps between adjacent reinforcing portions 31. In some embodiments, the surface on the side of the heat insulating protrusion 41 and adjacent to the battery cell 23 can be flush with the surface on the side of the reinforcing portion 31 and adjacent to the battery cell 23, thereby preventing the heat insulating protrusion 41 from protruding from the surface on the side of the reinforcing member 30 and adjacent to the battery cell 23. The double-sided adhesive can be positioned on the side of the heat-insulating protrusion 41 and close to the tray 20 in the height direction C of the battery pack 100, so that the heat-insulating protrusion 41 and the tray 20 are bonded together via the double-sided adhesive. In this way, the heat-insulating protrusion 41 is positioned in a one-to-one correspondence within a plurality of gaps formed by the reinforcing portion 31, thereby reducing the gap between the heat-insulating protrusion 41, the reinforcing portion 31 and the bottom of the tray 20, facilitating the fixing of the reinforcing member 30, and improving the heat insulation and sealing performance of the battery pack 100.

[0044] According to the battery pack 100 of this embodiment of the present application, as shown in Figure 1, the thermal insulation member 40 includes a flat plate portion 42 and at least one thermal insulation projection 41, the flat plate portion 42 being located at the bottom of the reinforcing member 30. The thermal insulation member 40 is located below the reinforcing member 30 in the height direction C of the battery pack 100, and the flat plate portion 42 is located below the thermal insulation projection 41 in the height direction C of the battery pack 100. In some embodiments, the thermal insulation projection 41 and the tray 20 can be bonded together via double-sided adhesive tape, with the side of the flat plate portion 42 and the side closer to the tray 20 being joined to the bottom of the reinforcing member 30. In this way, the thermal insulation member 40 is located to perform a specific thermal insulation function for the battery pack 100, improving the overall thermal insulation performance of the battery pack 100. Furthermore, the thermal insulation member 40 is located on the side of the reinforcing member 30 and away from the tray 20. When the battery pack 100 is subjected to a collision from below, the flat plate portion 42 on the heat insulating member 40 acts as a buffer, reducing the impact force generated by the reinforcing member 30 and improving its protective capacity. In this way, the overall structural strength of the battery pack 100 is improved, and the service life of the battery pack 100 is extended.

[0045] According to some embodiments of this application, as shown in Figures 1 and 5, the tray 20 includes a plurality of support beams 21, which are spaced apart in the longitudinal direction B of the tray 20 and divide the housing cavity 27 into a plurality of sub-housing cavities. A plurality of battery cells 23 are arranged in the width direction A of the tray 20 to form a battery group, which is arranged in the longitudinal direction B of the tray 20, and each of the battery groups is disposed in at least a portion of the plurality of sub-housing cavities. Reinforcement portions 31 are separately disposed on the plurality of support beams 21. The width direction A of the tray 20 coincides with the width direction A of the battery pack 100, and the longitudinal direction B of the tray 20 coincides with the longitudinal direction B of the battery pack 100. At least a portion of the plurality of sub-housing cavities is configured for the arrangement of battery cells 23, the plurality of reinforcement portions 31 are spaced apart in the longitudinal direction B of the battery pack 100 and extend in the width direction A of the battery pack 100, and the plurality of reinforcement portions 31 face the plurality of support beams 21. For example, multiple battery cells 23 form multiple battery groups, each battery group containing multiple battery cells 23, and the multiple battery cells 23 within each battery group are evenly distributed in the width direction A of the battery pack 100 within sub-container cavities formed through division of the containment cavity 27. One or both ends of the battery cells 23 in the length direction B of the battery pack 100 are separately positioned adjacent to one adjacent support beam 21. In this way, the multiple support beams 21 are spaced apart in the length direction B of the battery cells 23, thereby enabling the multiple battery cells 23 to be evenly distributed within the containment cavity 27 and preventing the multiple battery cells 23 from deforming by pressing against each other, which would affect the service life of the battery pack 100. Furthermore, the multiple support beams 21 can effectively strengthen the structural strength of the tray 20, facilitate the placement of the battery cells 23, and improve the impact resistance and extrusion resistance strength of the battery pack 100.

[0046] According to some embodiments of this application, as shown in Figure 3, the reinforcing member 30 further includes a first joint 32 and a second joint 33. The first joint 32 is joined to one end of the plurality of reinforcing members 31, and the second joint 33 is joined to the other end of the plurality of reinforcing members 31.

[0047] The first joint 32 and the second joint 33 each extend along the length direction B of the battery pack 100, and are positioned on both sides of the reinforcing member 30 in the width direction A of the battery pack 100. Both ends of the reinforcing member 31 in the width direction A of the battery pack 100 are joined to the first joint 32 and the second joint 33, respectively. The multiple reinforcing members 31, the first joint 32, and the second joint 33 surround multiple rectangular through holes, and the heat insulating projections 41 are fitted into the through holes. The reinforcing members 31 are positioned on the side of the first joint 32 and the second joint 33 and adjacent to the battery cells 23 in the height direction C of the battery pack 100 to facilitate contact of the reinforcing members 31 with the support beam 21. The first joint 32 and the second joint 33 can be fixed to the multiple reinforcing members 31 by welding. The first joint 32 includes at least one first joint section 321, which is joined between one end of two adjacent reinforcing sections 31. Alternatively, the second joint 33 includes at least one second joint section 331, which is joined between the other end of two adjacent reinforcing sections 31. Alternatively, the first joint 32 and the second joint 33 each include a plurality of first joint sections 321 and a plurality of second joint sections 331, respectively. The plurality of first joint sections 321 and the plurality of second joint sections 331 are respectively arranged on both sides of the battery pack 100 in the width direction A and spaced apart in the length direction B of the battery pack 100. At least one first joint section 321 and a second joint section 331 are located between two adjacent reinforcing sections 31, at both ends of the reinforcing section 31 in the width direction A of the battery pack 100, and multiple first joint sections 321 and multiple second joint sections 331 are joined to multiple reinforcing sections 31. Of course, if the first joint section 32 and the second joint section 33 each contain one first joint section 321 and one second joint section 331, then the first joint section 32 and the second joint section 33 are integrally separate. The first joint section 32 is joined to one end of the multiple reinforcing sections 31, and the second joint section 33 is joined to the other end of the multiple reinforcing sections 31.

[0048] Thus, the first joint 32 and the second joint 33 are each disposed on both sides of the reinforcing member 30 in the width direction A of the battery pack 100, facilitating the placement of the reinforcing part 31 on the first joint 32 and the second joint 33, thereby supporting the reinforcing part 31. In this way, the extrusion resistance of the reinforcing member 30 on both sides of the battery pack 100 in the width direction A is improved, improving the deformation resistance of the battery pack 100 in the width direction A, and further improving the extrusion resistance of the tray 20 on both sides in the width direction A. This increases the structural strength of the tray 20, better protects the battery cells 23 within the tray 20, and makes the structure of the battery pack 100 more stable.

[0049] According to some embodiments of this application, as shown in Figure 1, the longitudinal direction of the reinforcing portion 31 is parallel to the width direction A of the battery pack 100, and the longitudinal directions of the first joint 32 and the second joint 33 are parallel to the length direction B of the battery pack 100. The battery pack 100 has a width direction A, a length direction B, and a height direction C. The longitudinal direction of the reinforcing portion 31 coincides with the width direction A of the battery pack 100, and the longitudinal directions of the first joint 32 and the second joint 33 coincide with the length direction B of the battery pack 100.

[0050] According to some embodiments of this application, as shown in Figure 1, the bottom plate 22 includes a heat exchange plate 25. A reinforcing member 30 is disposed at the bottom of the heat exchange plate 25. Multiple support beams 21 are spaced apart in a housing cavity 27 along the length B of the battery pack 100, the reinforcing member 30 is disposed below the heat exchange plate 25 in the height C of the battery pack 100, and the flat plate portion 42 of the heat insulating member 40 is disposed below the reinforcing member 30. Heat insulating protrusions 41 are disposed between the reinforcing members 31, and the double-sided adhesive is disposed on the surface on the side of the heat insulating protrusions 41 and on the surface in the height C of the battery pack 100 that is close to the tray 20, so that the heat insulating protrusions can be fixed to the heat exchange plate 25. In other words, in the height direction C of the battery pack 100, the heat exchange plate 25, the reinforcing member 30, and the flat plate portion 42 of the heat insulating member 40 are arranged sequentially from the top to the bottom, and the heat insulating member 40 is lap-jointed with the reinforcing member 30 on the surface that is on the side of the heat exchange plate 25 and away from the battery cell 23. For example, the heat exchange plate 25 is arranged between the battery cell 23 and the reinforcing member 30, and the heat generated by the battery cell 23 in the battery pack 100 is exchanged with the heat exchange plate 25, thereby allowing the heat exchange plate 25 to remove heat from the battery cell 23 and perform heat dissipation.

[0051] Thus, if the temperature of the battery cells 23 in the housing cavity 27 is excessively high, the heat exchange plate 25 functions to lower the temperature, and if the temperature of the battery cells 23 in the housing cavity 27 is excessively low, the heat exchange plate 25 functions to raise the temperature, thereby maintaining the temperature of the battery cells 23 within a specific range and extending the service life of the battery cells 23. The reinforcing member 30 can improve the stone chip resistance of the bottom of the battery pack 100 and improve the overall structural strength of the battery pack 100.

[0052] According to some embodiments of this application, as shown in Figures 1 and 5, at least one support member is provided at one end of the lateral beam 28 and at the end adjacent to the bottom plate 22, the support member extending toward the center of the bottom plate 22, and the bottom plate 22 is provided on the support member. The lateral beam 28 is provided perpendicular to the bottom plate 22, the support member is provided at the lower end of the lateral beam 28 in the height direction C of the battery pack 100, the edge of the bottom plate 22 abuts against the support member and is provided above the support member in the height direction C of the battery pack 100. In this way, the support member is provided so that the bottom plate 22 is firmly joined to the lateral beam 28, thereby making it difficult for the bottom plate 22 to be removed from the lateral beam 28. This improves the structural strength of the tray 20 and further improves the overall structural strength of the battery pack 100.

[0053] According to some embodiments of this application, as shown in Figures 1 and 5, the reinforcing member 30 is welded to the lateral beam 28, and the side surface of the reinforcing member 30 that faces the bottom plate 22 is bonded to the bottom plate 22. The heat exchange plate 25 and the lateral beam 28 are formed by friction stir welding, which can reduce the manufacturing cost of the battery pack 100 and further improve the overall strength of the battery pack 100. In this way, the edges of the reinforcing member 30 are welded to the lateral beam 28, thereby allowing the reinforcing member 30 to be more firmly joined to the lateral beam 28. Furthermore, the reinforcing member 30 and the bottom plate 22 are bonded via an adhesive to maximize the bonding strength, thereby reducing the amount of welding, reducing deformation of the battery pack 100 that may occur due to welding, and improving the overall yield of the battery pack 100.

[0054] According to some embodiments of this application, as shown in Figure 1, the reinforcing member 30 is an extruded aluminum profile. Extruded aluminum profiles have the advantages of good product mechanical performance, high production flexibility, simple process procedures, and low manufacturing costs. The reinforcing member 30 is an extruded aluminum profile, thereby ensuring the structural strength of the reinforcing member 30 and reducing manufacturing difficulty and cost.

[0055] According to some embodiments of this application, as shown in Figure 1, the top of the tray 20 is open, and the battery pack 100 further includes an upper cover 10, which is disposed on the open side of the tray 20, and at least one reinforcing plate 15 is disposed on the top of the upper cover 10. The upper cover 10 is disposed above the lateral beam 28 in the height direction C of the battery pack 100, and the reinforcing plate 15 is disposed above the upper cover 10 in the height direction C of the battery pack 100. In other words, the reinforcing plate 15, the upper cover 10, the tray 20, the reinforcing member 30, and the heat insulating member 40 are disposed sequentially from the top to the bottom in the height direction C of the battery pack 100. Thus, the upper cover 10 can protect the upper portion of the battery pack 100 in the height direction C, and the reinforcing plate 15 is provided to improve the structural strength of the upper cover 10, protect the battery cells 23 inside the battery pack 100, and prevent the upper cover 10 from deforming after being pressed and consequently being pushed into the battery cells 23 inside the battery pack 100.

[0056] According to some embodiments of this application, as shown in Figures 1 and 4, the multiple reinforcing plates 31 are spaced apart along the length B of the tray 20, two reinforcing plates 15 are disposed on the upper cover 10, and the two reinforcing plates 15 are respectively positioned on both side edges of the tray 20 in the width A. Each reinforcing plate 15 extends along the length B of the battery cell 23. In other words, the reinforcing plates 15 extend along the length B of the battery pack 100, the reinforcing plates 15 are disposed above the upper cover 10 in the height C of the battery pack 100, and the two reinforcing plates 15 are respectively disposed on both sides of the upper cover 10 in the width A of the tray 20. In this way, the reinforcing plates 15 can effectively improve the extrusion resistance of both sides of the upper cover 10 in the width A of the battery pack 100, thereby improving the overall structural strength of the battery pack 100, and thus enabling the battery pack 100 to adapt to the complex environment in which it is used. For example, if the length B of the battery pack 100 is the same as the front-to-rear direction of the vehicle body, two reinforcing plates 15 can be provided to improve the impact resistance of the battery pack 100 in the left-to-right direction of the vehicle body, thereby improving the safety of the battery pack 100.

[0057] According to some embodiments of this application, the reinforcing plate 15 is a steel plate. The steel plate has the advantages of high strength, high temperature resistance, high voltage resistance, and corrosion resistance, and the reinforcing plate 15 is a steel plate that can help the battery pack 100 adapt to harsh external environments, further improve the overall structural strength of the battery pack 100, and extend the service life of the battery pack 100.

[0058] According to some embodiments of this application, as shown in Figures 1 and 4, the battery pack 100 further includes an upper cover 10, which is disposed on the open side of the tray 20 and facing the housing cavity 27, and the upper cover 10 includes a steel plate and an insulating plate. The insulating plate is disposed on the side of the steel plate and on the side adjacent to the housing cavity 27. The insulating plate is disposed on the lower part of the upper cover 10 in the height direction C of the battery pack 100, and the steel plate is disposed on the upper part of the upper cover 10 in the height direction C of the battery pack 100. The steel plate and the insulating plate are hot-pressed to form the upper cover 10. In this way, the steel plate and the insulating plate can be hot-pressed and used as the upper cover 10, thereby effectively improving the insulation performance of the battery pack 100.

[0059] According to some embodiments of this application, the insulating board is a fiberglass board. Fiberglass boards have good electrical insulation performance, and the outer surface of the fiberglass board has high-quality moisture-proof performance, making them suitable for products with high-performance electronic insulation requirements. Thus, the insulating board is a fiberglass board, which effectively improves the insulation and waterproofing performance of the upper cover 10, thereby improving the protection for the battery cells 23 in the battery pack 100.

[0060] According to some embodiments of this application, as shown in Figure 1, the top of the tray 20 is open, the battery pack 100 further includes an upper cover 10, the upper cover 10 is disposed on the open side of the tray 20, an access port 11 is formed on the upper cover 10, and a removable access cover 12 is disposed over the access port 11. In this way, the access port 11 is provided to facilitate maintenance of the battery pack 100 in the event of a failure, the access cover 12 is removable, thereby reducing the difficulty of maintenance and lowering maintenance costs.

[0061] According to some embodiments of this application, as shown in Figure 1, a power distribution module 24 is housed within a housing cavity 27, and the access port 11 and the power distribution module 24 are housed in correspondence. For example, both the access port 11 and the power distribution module 24 are housed at one end of the battery pack 100 in the longitudinal direction B, and the access port 11 is provided facing the power distribution module 24, thereby allowing the access cover 12 to be easily removed to facilitate maintenance of the power distribution module 24.

[0062] According to some embodiments of this application, as shown in Figure 1, the sealing member 14 is disposed between the access cover 12 and the upper cover 10, and the sealing member 14 is disposed around the access port 11. Thus, the sealing member 14 is disposed on the upper outer circumference of the access port 11. The sealing member 14 is positioned between the access port 11 and the access cover 12 and disposed around the access port 11, thereby allowing the access port 11 to be completely sealed, effectively improving the sealing performance of the battery pack 100 and protecting the power distribution module 24.

[0063] According to some embodiments of this application, as shown in Figure 1, the access port 11 is located on the edge of the upper cover 10, and the flange 13 for shielding the sealing member 14 is located on the side of the access cover 12 and away from the center of the upper cover 10. The flange 13 is located on the side of the access cover 12 and away from the center of the battery pack 100 in the longitudinal direction B of the battery pack 100, and the flange 13 is bent toward the tray 20 in the height direction C of the battery pack 100. When the access cover is assembled to seal the access port 11, the flange 13 can improve the sealing performance of the joint between the access cover 12 and the access port 11. Thus, the structure of the flange 13 of the access cover 12 can protect the sealing member 14 when the battery pack 100 is exposed to water, preventing the sealing member 14 from being affected by sand and gravel in the water, resulting in sealing failure and damage to the power distribution module 24.

[0064] According to some embodiments of this application, as shown in Figure 5, the battery pack 100 further includes an insulating layer 26. The insulating layer 26 is disposed on the inner wall surface of the tray 20, which faces the housing cavity 27. The insulating layer 26 can be formed on the inner wall surface of the tray 20 by painting. The insulating layer 26 can be an epoxy coating, which has excellent corrosion resistance, as well as excellent adhesion, weather resistance, water resistance, and durability. Furthermore, the epoxy coating has the characteristics of easy application, curing at room temperature, a simple application process, and no constraints on the site environment. The epoxy coating can be prepared for immediate use, used with a general application method, and can cure at room temperature to form a film. In this way, the insulating layer 26 is spray-coated to cover the inner wall surface of the tray 20, thereby improving the insulation performance of the tray 20, and preventing the battery cells 23 from short-circuiting and arcing with the tray 20 in the event of leakage due to loss.

[0065] According to some embodiments of this application, as shown in Figure 1, the battery pack 100 further includes a protective plate 50. The protective plate 50 is disposed at the bottom of the heat insulating member 40. The protective plate 50 is disposed below the heat insulating member 40 and can be a high-strength steel plate to which a nanocoating has been spray-coated, thereby improving the corrosion resistance of the protective plate 50. In this way, the arrangement of the protective plate 50 can effectively improve the stone chip resistance of the bottom of the battery pack 100 and effectively improve the overall structural strength of the battery pack 100.

[0066] According to some embodiments of this application, the reinforcing portion 31 extends below one end of the battery cell 23 in the longitudinal direction. Battery posts are disposed at the ends of the battery cell 23 in the longitudinal direction. Multiple reinforcing portions 31 are spaced apart in the longitudinal direction B of the tray 20.

[0067] According to some embodiments of this application, the longitudinal direction of the support beam 21 is parallel to the width direction A of the battery pack 100, and the longitudinal direction B of the battery cell 23 is parallel to the longitudinal direction B of the battery pack 100. In other words, the longitudinal direction of the support beam 21 coincides with the width direction A of the battery pack 100, and the longitudinal direction of the battery cell 23 coincides with the longitudinal direction of the battery pack 100.

[0068] A vehicle 1000 according to an embodiment of the second aspect of this application includes a battery pack 100 according to an embodiment of the first aspect of this application, as shown in Figure 6.

[0069] According to the vehicle 1000 in this embodiment of the present application, the collision resistance capability of the vehicle 1000 can be improved, and the safety of the vehicle 1000 in use can be effectively improved.

[0070] In the description of this application, orientations or positional relationships indicated by terms such as “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “top,” “bottom,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inside,” “outside,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” are orientations or positional relationships shown in the accompanying drawings and are intended merely to facilitate explanation and simplify the description of this application, but it should be understood that they are not intended to indicate or imply that a specified device or element has a particular orientation, is constructed in a particular orientation, or is required to operate in a particular orientation. Therefore, such terms should not be construed as limitations on this application.

[0071] In the description of this application, “first feature” or “second feature” may include one or more such features. In the description of this application, “multiple” means two or more. In the description of this application, the presence of the first feature “above” or “below” the second feature may mean that the first feature is in direct contact with the second feature, or that the first feature is not in direct contact with the second feature but is in contact with the second feature through another feature between the first and second features. In the description of this application, the presence of the first feature “above,” “on top of,” or “above” the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply that the horizontal height of the first feature is greater than the horizontal height of the second feature.

[0072] In this specification, reference terms such as “one embodiment,” “several embodiments,” “a schematic embodiment,” “an example,” “a specific example,” or “several examples” mean that a particular feature, structure, material, or property described by reference to an embodiment or example is included in at least one embodiment or example of this application. In this specification, schematic expressions of the aforementioned terms do not necessarily refer to the same embodiment or example.

Claims

1. A tray (20) comprising a bottom plate (22), side beams (28), and at least one support beam (21), wherein the bottom plate (22) and the side beams (28) surround a housing cavity (27), and the support beam (21) is disposed within the housing cavity (27), A plurality of battery cells (23), all of which are arranged within the housing cavity (27), A reinforcing member (30) disposed at the bottom of the bottom plate (22), wherein the reinforcing member (30) comprises a plurality of reinforcing parts (31), the plurality of reinforcing parts (31) are spaced apart, and at least one of the reinforcing parts (31) is positioned on the support beam (21) and extends below the battery cell (23), An insulating member (40) wherein at least one insulating projection (41) is disposed on the insulating member (40), and the at least one insulating projection (41) is positioned between two adjacent reinforcing parts (31), and A battery pack (100) equipped with this.

2. A battery pack (100) according to claim 1, wherein a plurality of gaps are formed between the plurality of reinforcing portions (31), a plurality of heat insulating protrusions (41) are arranged on the surface of the heat insulating member (40), and the plurality of heat insulating protrusions (41) are arranged in the plurality of gaps in a one-to-one correspondence.

3. The aforementioned heat insulating member (40) Flat plate portion (42) and The at least one heat insulating projection (41) is disposed on the surface of the flat plate portion (42), and the flat plate portion (42) is disposed on the bottom of the heat insulating projection (41) and on the bottom of the reinforcing member (30), and A battery pack (100) according to claim 1 or 2, comprising the above.

4. The tray (20) comprises a plurality of support beams (21), the plurality of support beams (21) are spaced apart in the longitudinal direction (B) of the tray (20) to divide the housing cavity (27) into a plurality of sub-housing cavities, the plurality of battery cells (23) are arranged in the width direction (A) of the tray (20) to form a battery group, the plurality of battery groups are arranged in the longitudinal direction (B) of the tray (20), and the plurality of battery groups are each disposed in at least a portion of the plurality of sub-housing cavities. The battery pack (100) according to any one of claims 1 to 3, wherein the reinforcing portion (31) is separately arranged on the plurality of support beams (21).

5. The reinforcing member (30) A first joint (32) is joined to one end of the plurality of reinforcing parts (31), wherein the first joint (32) comprises at least one first joint section (321), A second joint (33) joined to the other end of the plurality of reinforcing parts (31), wherein the second joint (33) comprises at least one second joint section (331) The battery pack (100) according to claim 4, further comprising the above.

6. The battery pack (100) according to claim 5, wherein the length direction (B) of the reinforcing portion (31) is parallel to the width direction (A) of the battery pack (100), and the length directions (B) of the first joint portion (32) and the second joint portion (33) are parallel to the length direction (B) of the battery pack (100).

7. The aforementioned bottom plate (22) A battery pack (100) according to any one of claims 1 to 6, comprising a heat exchange plate (25), wherein the reinforcing member (30) is disposed at the bottom of the heat exchange plate (25).

8. A battery pack (100) according to any one of claims 1 to 7, wherein at least one support member is disposed at one end of the lateral beam (28) and is adjacent to the bottom plate (22), the support member extends toward the center of the bottom plate (22), and the bottom plate (22) is disposed on the support member.

9. The battery pack (100) according to any one of claims 1 to 8, wherein the reinforcing member (30) is welded to the lateral beam (28), and the side surface of the reinforcing member (30) that faces the bottom plate (22) is bonded to the bottom plate (22).

10. The battery pack (100) according to any one of claims 1 to 9, wherein the reinforcing member (30) is an extruded aluminum profile.

11. The battery pack (100) according to any one of claims 1 to 10, wherein the top of the tray (20) is open, the battery pack (100) further comprises an upper cover (10), the upper cover (10) is disposed on the open side of the tray (20), and at least one reinforcing plate (15) is disposed on the top of the upper cover (10).

12. The battery pack (100) according to claim 11, wherein two reinforcing plates (15) are disposed on the upper cover (10), the two reinforcing plates (15) are spaced apart in the width direction (A) of the tray (20), the two reinforcing plates (15) are respectively positioned on both side edges of the tray (20) in the width direction (A), and the two reinforcing plates (15) extend in the length direction (B) of the tray (20).

13. The battery pack (100) according to claim 11 or 12, wherein the reinforcing plate (15) is a steel plate.

14. The battery pack (100) according to any one of claims 1 to 10, wherein the battery pack (100) further comprises an upper cover (10), the upper cover (10) is disposed on the open side of the tray (20), the upper cover (10) comprises a steel plate and an insulating plate, the insulating plate is disposed on one side of the steel plate and on the side adjacent to the housing cavity (27).

15. The battery pack (100) according to claim 14, wherein the insulating plate is a glass fiber board.

16. The battery pack (100) according to any one of claims 1 to 10, wherein the top of the tray (20) is open, the battery pack (100) further comprises an upper cover (10), the upper cover (10) is disposed on the open side of the tray (20), an access port (11) is provided on the upper cover (10), and a removable access cover (12) is disposed on the access port (11).

17. The battery pack (100) according to claim 16, wherein a power distribution module (24) is disposed within the housing cavity (27), and the access port (11) and the power distribution module (24) are disposed in correspondence.

18. The battery pack (100) according to claim 16 or 17, wherein a sealing member (14) is disposed between the access cover (12) and the upper cover (10), and the sealing member (14) is disposed around the access port (11).

19. The battery pack (100) according to any one of claims 16 to 18, wherein the access port (11) is located on the edge of the upper cover (10), and the flange (13) for shielding the sealing member (14) is located on the side of the access cover (12) and away from the center of the upper cover (10).

20. The battery pack (100) according to any one of claims 1 to 19, further comprising an insulating layer (26) disposed on the inner wall surface of the tray (20) that is also facing the housing cavity (27).

21. The battery pack (100) according to any one of claims 1 to 20, further comprising a protective plate (50) disposed at the bottom of the heat insulating member (40).

22. The length direction (B) of the support beam (21) is parallel to the width direction (A) of the battery pack (100), The battery pack (100) according to any one of claims 1 to 21, wherein the longitudinal direction (B) of the battery cell (23) is parallel to the longitudinal direction (B) of the battery pack (100).

23. The battery pack (100) according to any one of claims 1 to 21, wherein the reinforcing portion (31) extends below one end of the battery cell (23) in the longitudinal direction (B).

24. The battery pack (100) according to claim 23, wherein the battery post is disposed at one end of the battery cell (23) in the longitudinal direction (B).

25. The battery pack (100) according to any one of claims 1 to 24, wherein the plurality of reinforcing parts (31) are spaced apart in the longitudinal direction (B) of the tray (20).

26. A vehicle (1000) comprising a battery pack (100) according to any one of claims 1 to 25.

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