Battery tray bottom plate, battery tray, battery pack and vehicle

Abstract

An embodiment of the present application provides a tray bottom plate for a battery, a battery tray, a battery pack and a vehicle, the tray bottom plate includes a main body portion and a flange portion, the main body portion includes a bottom wall and a side wall, the side wall is disposed around the bottom wall and together with the bottom wall defines a chamber for accommodating the battery, the thickness of the bottom wall is t1, 1 mm≦t1≦3 mm, the flange portion is installed on an edge of the side wall and disposed around the side wall, the thickness of the flange portion is t2, t2>t1.

Description

[Technical Field]

[0001] This application claims priority to a Chinese patent application bearing application number 202220553715.X and entitled "Battery tray bottom plate, battery tray, power battery pack and vehicle," filed with the State Intellectual Property Office of the People's Republic of China on March 14, 2022, the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the technical field of vehicles, and more particularly to a tray bottom plate for a battery, a battery tray, a battery pack, and a vehicle. [Background technology]

[0003] In a battery pack, a battery tray is generally used to mount batteries. When designing a battery pack with different specifications, the dimensions and layout of the internal batteries and other components will differ, and the requirements for the connection strength between the battery tray and other components will also differ. Therefore, the design of the battery tray must be changed accordingly. In addition, the mold used to manufacture the battery tray generally needs to be redesigned to meet the structural requirements of the battery tray after the above changes, resulting in higher design costs and processing costs. Summary of the Invention

[0004] The present application aims to solve at least one of the technical problems in the prior art by providing a tray bottom plate for a battery that improves connection strength with other components and improves the safety of the entire battery pack.

[0005] A tray bottom plate for a battery according to an embodiment of the first aspect of the present application includes a main body portion and a flange portion, the main body portion including a bottom wall and a side wall, the side wall being disposed around the bottom wall and defining a chamber for accommodating a battery together with the bottom wall, the thickness of the bottom wall being t1, where 1 mm≦t1≦3 mm, the flange portion being installed on an edge of the side wall and disposed around the side wall, the thickness of the flange portion being t2, where t2>t1.

[0006] The battery tray bottom plate according to the embodiment of the present application has a bottom wall thickness of t1, a flange portion thickness of t2, and 1 mm≦t1≦3 mm and t2>t1, thereby improving the connection strength between the tray bottom plate and other components and improving the safety of the entire battery pack.

[0007] In some embodiments, 2 × t1≦t2≦3 × It is t1.

[0008] In some embodiments, the thickness of the sidewall is t3, where t3=t1.

[0009] In some embodiments, the depth of the chamber is t, where 15 mm≦t≦45 mm.

[0010] In some embodiments, the included angle between the side wall and the bottom wall is α, where 100°≦α≦120°.

[0011] In some embodiments, the flange portion has a through hole formed therein, and the through hole has a diameter D, and d≦D≦min{10 × t2, w / 3}, d is the diameter of the fastener that passes through the through hole and is fixedly connected to the tray frame, and w is the width of the flange portion.

[0012] In some embodiments, the flange portion includes a plurality of sub-flanges, the plurality of sub-flanges being connected in sequence end-to-end.

[0013] In some embodiments, each of the sub-flanges has a plurality of through holes formed therein, and the plurality of through holes in each of the sub-flanges are spaced apart along the length of the sub-flange and / or the width of the sub-flange.

[0014] In some embodiments, the tray bottom plate is a single piece.

[0015] In some embodiments, the tray bottom plate is made of a composite material.

[0016] A battery tray according to an embodiment of the second aspect of the present application includes a tray bottom plate for a battery according to the embodiment of the first aspect of the present application and a tray frame, the tray frame being installed below the flange portion and fixedly connected to the tray bottom plate.

[0017] The battery tray according to the embodiment of the present application uses the tray bottom plate to improve the connection strength between the battery tray and other components, thereby ensuring the safety of the battery pack during use.

[0018] In some embodiments, the battery tray further includes a fastener, the fastener passing through the through hole and fixedly connected to the tray frame.

[0019] In some embodiments, the tray frame includes a frame portion that surrounds the side wall and is fixedly connected to the side wall and the flange portion.

[0020] In some embodiments, the frame portion is adhered to the sidewall and the flange portion.

[0021] In some embodiments, the tray frame further includes a support portion located on a side of the frame portion adjacent to the chamber and supporting a bottom portion of the bottom wall.

[0022] In some embodiments, the support is adhered to the bottom wall.

[0023] In some embodiments, the width of the frame portion is w1, the width of the support portion is w2, and w2≧2 × w1 / 3.

[0024] In some embodiments, the tray frame is a single piece.

[0025] A battery pack according to an embodiment of the third aspect of the present application includes at least one battery, a top cover, and a battery tray according to an embodiment of the second aspect of the present application, wherein the top cover is disposed on the open side of the storage chamber and defines an installation space together with the tray bottom plate, and the at least one battery is installed in the installation space.

[0026] The battery pack in the vehicle according to the embodiment of the present application can easily ensure the safety of the entire battery pack by using the battery tray, and the vehicle according to the embodiment of the present application can easily ensure the safety of the vehicle when used by using the battery pack.

[0027] In some embodiments, the depth of the chamber is t, the height of each of the cells is h, and h / 4≦t≦h / 3.

[0028] In some embodiments, the top cover and the tray are fixedly connected via the fasteners.

[0029] A vehicle according to an embodiment of the fourth aspect of the present application includes the battery pack according to the embodiment of the third aspect of the present application.

[0030] The vehicle according to the embodiment of the present application can easily ensure the safety of the vehicle by using the battery pack.

[0031] Additional aspects and advantages of the present application will be set forth in part in the description that follows, and in part will be obvious from the description, or may be learned by practice of the present application. [Brief explanation of the drawings]

[0032] The above and / or additional aspects and advantages of the present application will become apparent and readily understood from the following detailed description of the preferred embodiments with reference to the following drawings.

[0033] [Figure 1] 1 is a schematic diagram of a tray bottom plate according to an embodiment of the present application. [Figure 2]FIG. 2 is a cross-sectional view of the tray bottom plate shown in FIG. [Figure 3] 1 is a schematic diagram of a battery tray according to an embodiment of the present application. [Figure 4] FIG. 4 is an exploded view of the battery tray shown in FIG. 3. [Figure 5] 4 is another schematic view of the battery tray shown in FIG. 3. [Figure 6] FIG. 6 is a cross-sectional view taken along line AA in FIG. 5. [Figure 7] FIG. 7 is an enlarged view of a portion B circled in FIG. 6. [Figure 8] 1 is a schematic diagram of a battery pack according to an embodiment of the present application. [Figure 9] 1 is a schematic diagram of a vehicle according to an embodiment of the present application; DETAILED DESCRIPTION OF THE INVENTION

[0034] Hereinafter, the embodiments of the present application will be described in detail, and examples of the embodiments are shown in the drawings, and the same or similar reference numerals throughout indicate the same or similar parts or parts having the same or similar functions. The embodiments described below with reference to the drawings are merely illustrative and are intended to help interpret the present application, and should not be understood as limiting the present application.

[0035] The following disclosure provides many different embodiments or examples for realizing different structures of the present application. To simplify the disclosure of the present application, specific example components and installations will be described below. Of course, these are merely exemplary and are not intended to limit the present application. Furthermore, the present application may repeat reference numerals and / or alphabetical characters in different examples. Such repetition is for the purposes of brevity and clarity and does not in itself indicate a relationship between the various embodiments and / or installations discussed. Furthermore, while the present application provides examples of various specific processes and materials, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0036] Hereinafter, a battery tray bottom plate 1 according to an embodiment of the present invention will be described with reference to the drawings.

[0037] As shown in Figures 1 and 2, the tray bottom plate 1 includes a main body 11, which includes a bottom wall 111 and a side wall 112. The side wall 112 is arranged to surround the bottom wall 111 and together with the bottom wall 111 defines an accommodating chamber 110, which accommodates a battery. The side wall 112 may be formed in a substantially annular structure, and the bottom wall 111 and the side wall 112 each provide a certain degree of positional control for the battery, making it easy to ensure stable installation of the battery, and the tray bottom plate 1 can also provide protection for the battery.

[0038] When the thickness of the bottom wall 111 is t1 and is 1 mm≦t1≦3 mm, the thickness of the bottom wall 111 is reasonable, preventing the bottom wall 111 from being too thin, which would result in poor load-bearing capacity, and also preventing the bottom wall 111 from being too thick, which would make processing the bottom wall 111 difficult and waste material. For example, the thickness t1 of the bottom wall 111 may be 1 mm, 1.3 mm, 1.8 mm, 2 mm, 2.5 mm, 2.7 mm, 3 mm, etc.

[0039] The tray bottom plate 1 further includes a flange portion 12, which is installed on the edge of the side wall 112 and may form a generally annular structure when installed around the side wall 112, and at least a portion of the side wall 112 may be located radially inside the annular structure corresponding to the flange portion 12.

[0040] The thickness of the flange portion 12 is t2, where t2>t1, and the tray bottom plate 1 and other components must be connected via the flange portion 12. Therefore, by making the thickness of the flange portion 12 greater than the thickness of the bottom wall 111, the structural strength of the flange portion 12 is effectively improved, the connection strength between the tray bottom plate 1 and other components is improved, and the need for different connection strengths of the tray bottom plate 1 for different battery packs can be easily met. When the tray bottom plate 1 is used in a battery tray 100, the connection strength between the battery tray 100 and other components is improved, and the safety of the entire battery pack can be improved.

[0041] The battery tray bottom plate 1 according to the embodiment of the present application has a bottom wall 111 with a thickness t1, a flange portion with a thickness t2, and 1 mm≦t1≦3 mm and t2>t1, thereby achieving partial reinforcement of the tray bottom plate 1 and improving the connection strength between the tray bottom plate 1 and other components, thereby improving the safety of the entire battery pack.

[0042] In some embodiments, as shown in FIG. × t1≦t2≦3 × For example, if t1 is 2, then t2 is 2. × t1, 2.3 × t1, 2.5 × t1, 2.8 × t1 or 3 × t1, etc., and the thickness of the flange portion 12 and the thickness of the bottom wall 111 are set relatively reasonably, thereby ensuring that the tray bottom plate 1 can be adapted to different battery packs, ensuring reasonable allocation and use of materials, facilitating the processing of the flange portion 12 and the bottom wall 111, and making the height of the battery pack reasonable.

[0043] 2, the thickness of the sidewall 112 is t3, where t3=t1, which can easily simplify the processing of the main body 11. For example, when the main body 11 is a press-molded product, this helps reduce the design requirements for the mold.

[0044] 2, the depth of the chamber 110 is t, where 15 mm≦t≦45 mm, so that the chamber 110 can meet the needs of different batteries and improve the applicability of the tray bottom plate 1. For example, the depth of the chamber 110 may be 15 mm, 20 mm, 30 mm, 36 mm, 42 mm, or 45 mm.

[0045] In some embodiments, as shown in FIG. 2 , the included angle α between the side wall 112 and the bottom wall 111 is 100°≦α≦120°. The side wall 112 may extend from the edge of the bottom wall 111 to the flange 12, sloping away from the center of the bottom wall 111 in the direction from the bottom toward the flange 12. This facilitates ensuring that the chamber 110 has an opening of an appropriate size, allowing for smooth insertion and removal of batteries through the opening. Furthermore, when the main body 11 is a press-molded product, the included angle α between the side wall 112 and the bottom wall 111 satisfies the above requirements, facilitating demolding of the main body 11 during processing, improving the convenience of demolding, and thereby improving the processing efficiency of the tray bottom plate 1. For example, the included angle α may be 100°, 103°, 110°, 115°, or 120°.

[0046] In addition, the extending direction of the side wall 112 intersects with the normal direction of the bottom wall 111 to form a non-zero included angle, thereby increasing the extending length of the side wall 112. When the side wall 112 is bonded to the tray frame 2, the bonding area between the side wall 112 and the tray frame 2 can be increased, thereby improving the connection strength between the tray bottom plate 1 and the tray frame 2 to a certain extent and further ensuring the reliability of battery installation.

[0047] In some embodiments, as shown in FIG. 1, a plurality of through holes 120 are formed in the flange portion 12, and the diameter of the through holes 120 is D, where d≦D≦min{10 × t2, w / 3}, d is the diameter of the fastener 5 that passes through the through-hole 120 and is fixedly connected to the tray frame 2, and w is the width of the flange portion 12. By setting D≧d, the through-hole 120 can effectively avoid the fastener 5, ensuring that the fastener 5 is smoothly attached to the through-hole 120, and reducing the pressing force of the fastener 5 against the edge of the through-hole 120, which helps to avoid the generation of unnecessary stress between the fastener 5 and the flange portion 12. D≦min{10 × t2, w / 3}, that is, D is 10 ×By not exceeding the minimum value between t2 and w / 3, the structural strength of the edge of the through hole 120 is ensured, which helps to ensure that the through hole 120 has high structural stability and also helps to ensure that the connection between the flange portion 12 and other components, such as the tray frame 2, is strong.

[0048] As can be understood, when the tray bottom plate 1 is applied to the battery tray 100, the tray bottom plate 1 is fixedly connected to the tray frame 2, and the tray frame 2 can be firmly attached to the battery in the height direction by the fasteners 5. For example, a top cover 4 is installed on the upper side of the tray bottom plate 1, and the fasteners 5 fixedly connect the top cover to the tray frame 2. In the example of FIG. 1 , the flange portion 12 includes a plurality of sub-flanges 121, which are connected end to end in sequence to form the flange portion 12 in a polygonal ring shape, and each sub-flange 121 has a plurality of through holes 120, which may be spaced apart along the length direction of the sub-flange 121 and / or the width direction of the sub-flange 121.

[0049] In some embodiments, the tray bottom plate 1 is a one-piece molded product, which omits the connection process between the main body portion 11 and the flange portion 12, thereby improving the processing efficiency of the tray bottom plate 1, and there is no need to process connection structures, etc. in the main body portion 11 and / or the flange portion 12, which simplifies the structure of the tray bottom plate 1 and helps reduce costs.In addition, the connection strength between each part of the tray bottom plate 1 can be easily ensured, and the overall structural strength of the tray bottom plate 1 can be easily ensured.

[0050] As can be understood, when the tray bottom plate 1 is an integrally molded product, the processing method of the tray bottom plate 1 can be specifically set according to actual needs. For example, the tray bottom plate 1 can be formed as an integrally pressed product by press molding, and the mold for manufacturing the tray bottom plate 1 has replaceable modules installed in the part corresponding to the flange portion 12, with different module thicknesses matching the thickness of the flange portion 12. For example, as the flange portion 12 becomes thicker, the module thickness becomes thinner, and as the flange portion 12 becomes thinner, the module thickness becomes thicker. Then, the main body 11 and the flange portion 12 are pressed together by a press process or the like.

[0051] As a result, during the manufacturing and molding of the tray bottom plate 1, for flange portions 12 that need to be processed to different thicknesses, modules of corresponding thicknesses can be replaced to meet the needs of different thicknesses of the flange portions 12, effectively improving the versatility of the mold for manufacturing the tray bottom plate 1, reducing manufacturing costs, and eliminating the need to redesign the mold for manufacturing the tray bottom plate 1.

[0052] In addition, in some technologies, changes in the height of the batteries in the battery pack require the height of the entire battery pack to be adjusted, making the battery tray unable to fit battery packs of different heights, and generally requiring redesign of the battery tray and the mold for manufacturing the battery tray. In the present application, the connection between the tray bottom plate 1 and other components is reliable, and the thickness of the flange portion 12 is greater than the thickness of the bottom wall 111, so the thickness of the flange portion 12 is not limited by the thickness of the bottom wall 111. Therefore, the design of the thickness of the flange portion 12 is flexible, and the thickness of the flange portion 12 can be adjusted as needed according to design needs to meet the connection needs of battery packs of different heights. This allows the tray bottom plate 1 to adapt to changes in the height of the battery pack, improving the adaptability of the tray bottom plate 1 and eliminating the need to redesign the tray bottom plate 1 and the mold for manufacturing the tray bottom plate 1.

[0053] As a result, by using the battery tray 100 with the tray bottom plate 1 of the present application for battery packs of different heights, the thickness of the flange portion 12 can be reasonably adjusted according to actual needs, allowing the battery tray 100 to fit battery packs of different heights and improving the applicability of the battery tray 100. If the battery tray 100 includes a tray frame 2, there is no need to redesign the tray frame 2 to meet the connection strength needs between the battery tray 100 and other components for battery packs of different heights, and there is no need to redesign the mold for manufacturing the tray frame 2, effectively reducing design and processing costs.

[0054] In some embodiments, the tray bottom plate 1 is made of composite material, which can easily ensure the structural strength of the tray bottom plate 1 and allow the tray bottom plate 1 to stably mount the batteries.

[0055] In addition, in some technologies, the tray bottom plate is made of an aluminum alloy member, but has a certain degree of conductivity, which increases the risk of high-voltage arc discharge between the tray bottom plate and the battery if an abnormality such as a battery pack coolant leak occurs. In this application, the tray bottom plate 1 is made of a composite material, which provides high electrical insulation and prevents the risk of high-voltage arc discharge between the tray bottom plate 1 and the battery, even if the battery pack coolant leaks, thereby ensuring normal use of the battery pack.

[0056] Preferably, when the tray bottom plate 1 is made of a composite material, during the manufacturing and molding of the tray bottom plate 1, since the thickness of the flange portion 12 is greater than the thickness of the bottom wall 111, multiple plies of prepreg material cut based on the shape of the flange portion 12 are added at the position corresponding to the flange portion 12; and the mold for manufacturing the tray bottom plate 1 is equipped with replaceable modules at the part corresponding to the flange portion 12, with different module thicknesses that are compatible with the thickness of the flange portion 12, and then the main body portion 11 and the flange portion 12 are integrally bonded by a hot pressing process or the like.

[0057] According to the second embodiment of the present application, as shown in Figures 3 to 5, a battery tray 100 includes a tray bottom plate 1 and a tray frame 2, where the tray bottom plate 1 is the tray bottom plate 1 for a battery according to the first embodiment of the present application, and the tray frame 2 is installed below the flange portion 12 and fixedly connected to the tray bottom plate 1. The tray frame 2 can directly or indirectly support the tray bottom plate 1, thereby stably installing the battery in the accommodating chamber 110 of the tray bottom plate 1 and improving the connecting force between the tray bottom plate 1 and the tray frame 2 to some extent, making it easy to ensure that the tray frame 2 and the tray bottom plate 1 are securely fixed together.

[0058] The battery tray 100 according to the embodiment of the present application uses the tray bottom plate to improve the connection strength between the battery tray 100 and other components, thereby ensuring the safety of the battery pack during use.

[0059] In some embodiments, the battery tray 100 further includes fasteners 5, which pass through the through holes 120 and are fixedly connected to the tray frame 2. In some embodiments, there are multiple fasteners 5 and multiple through holes 120, and the multiple fasteners 5 correspond one-to-one to the multiple through holes 120. This ensures a fixed connection between the battery tray 100 and the tray frame 2, making it less likely for misalignment or movement to occur.

[0060] 4, 6 and 7, the tray frame 2 includes a frame portion 21, which can be formed into a substantially annular structure when installed around the side wall 112, and is installed on the side of the side wall 112 facing away from the receiving chamber 110. The frame portion 21 is fixedly connected to the side wall 112 and the flange portion 12, i.e., when the frame portion 21 is fixedly connected to the side wall 112 and the flange portion 12, a sufficient connection area between the frame portion 21 and the tray bottom plate 1 can be easily ensured, thereby ensuring a reliable connection between the frame portion 21 and the tray bottom plate 1.

[0061] In the description of the present application, "annular" should be understood in a broad sense, i.e., it is not limited to "circular annular" and may be, for example, "polygonal annular" etc. For example, in the example of Figures 1 to 4, the frame portion 21, the side wall 112 and the flange portion 12 are each formed in a substantially rectangular annular shape, the frame portion 21 has four sides, and each side of the frame portion 21 is fixed to a corresponding side of the side wall 112 and to a corresponding side of the flange portion 12 (for example, the corresponding sub-flange 121).

[0062] 7 , when the frame portion 21 is bonded to the side wall 112, there is no need to form connection holes in either the side wall 112 or the frame portion 21, which simplifies the processing steps for the frame portion 21 and the side wall 112 and also avoids the formation of connection holes in the side wall 112, which would make sealing of the accommodating chamber 110 difficult, since the side wall 112 is involved in defining the accommodating chamber 110. When the frame portion 21 is bonded to the flange portion 12, there is no need to form connection holes in either the flange portion 12 or the frame portion 21, which simplifies the processing steps for the frame portion 21 and the flange portion 12. This ensures a large bonding area between the frame portion 21 and the tray bottom plate 1 and effectively ensures the connection strength between the tray frame 2 and the tray bottom plate 1.

[0063] In some embodiments, as shown in FIG. 7 , the tray frame 2 further includes a support portion 22, which is installed on the side of the frame portion 21 closest to the storage chamber 110 and supports the bottom of the bottom wall 111. The support portion 22 can indirectly place the battery, effectively ensuring that the battery is securely attached and reducing the placement requirements of the tray bottom plate 1, which helps reduce the cost of the battery tray 100.

[0064] The direction "inner" refers to a direction along the radial direction of the frame portion 21, approaching the central axis of the frame portion 21.

[0065] As can be appreciated, the specific installation manner of the support portion 22 can be specifically set according to actual needs. For example, in the examples of Figures 4, 6, and 7, the frame portion 21 is formed in an annular structure, and the support portion 22 is installed corresponding to a portion of the entire inner circumferential wall of the frame portion 21. This simplifies the structure of the support portion 22, reduces the amount of material used for the support portion 22, and reduces costs, while still meeting the battery mounting needs. Of course, the support portion 22 may also be installed corresponding to the entire inner circumferential wall of the frame portion 21, for example, the support portion 22 may define an annular structure, which helps to improve the mounting capacity of the tray frame 2.

[0066] In some alternative embodiments, as shown in FIG. 7, the support portion 22 and the frame portion 21 are integrally molded, which omits the connection process between the support portion 22 and the frame portion 21 and helps improve the processing efficiency of the tray frame 2. In addition, there is no need to process connection structures, etc. in the frame portion 21 and / or the support portion 22, which helps simplify the structure of the tray frame 2 and reduce costs.

[0067] In some embodiments, as shown in FIG. 7, when the support portion 22 is bonded to the bottom wall 111, there is no need to form a connection hole in either the bottom wall 111 or the support portion 22, which simplifies the processing steps of the support portion 22 and the bottom wall 111, and also avoids the formation of a connection hole in the bottom wall 111, which would make it difficult to seal the storage chamber 110, since the bottom wall 111 is involved in defining the storage chamber 110.

[0068] In some embodiments, as shown in FIG. 7, the width of the frame portion 21 is w1, the width of the support portion 22 is w2, and w2≧2 × By making it w1 / 3, it is possible to easily ensure the support width of the support portion 22 relative to the bottom wall 111, and to achieve effective support of the support portion 22 relative to the bottom wall 111. For example, w2 / w1 may be 2 / 3, 3 / 4, or 4 / 5.

[0069] As shown in Fig. 8, Fig. 8 is a schematic diagram of a battery pack according to an embodiment of the present application. According to an embodiment of the third aspect of the present application, a battery pack 200 includes at least one battery 3, a top cover 4, and a battery tray 100, the battery tray 100 being the battery tray 100 according to the embodiment of the second aspect of the present application, the top cover 4 covering the open side of the accommodating chamber 110 and defining an installation space together with the tray bottom plate 1, and the at least one battery 3 being installed in the installation space.

[0070] The battery pack 200 according to the embodiment of the present application can easily ensure the safety of the entire battery pack 200 by using the battery tray 100 described above.

[0071] 2 , the depth of the chamber 110 is t, the height of each battery 3 is h, and if h / 4≦t≦h / 3, the height of the battery 3 is greater than the depth of the chamber 110. When the chamber 110 accommodates a portion of the battery, the remaining portion of the battery 3 allows the battery to be smoothly removed from the chamber 110 or the battery 3 to be stably placed in the chamber 110. Thus, by rationalizing the relationship between the depth of the chamber 110 and the height of the battery 3, the battery 3 can be stably placed and the ease of processing the battery tray 100 can be improved. For example, t / h may be 0.25, 0.27, 0.29, 0.3, or 1 / 3.

[0072] In this case, the top cover 4 also defines a storage chamber, which can accommodate other parts of the battery 3; in this case, the mounting space may include the storage chamber 110 and the storage chamber, thereby achieving all-round protection for the battery.

[0073] In some embodiments, a bottom protection plate is installed under the battery tray 100 to provide additional protection for the battery pack 200 .

[0074] As shown in Fig. 9, Fig. 9 is a schematic diagram of a vehicle according to an embodiment of the present application. A vehicle 300 according to an embodiment of the fourth aspect of the present application includes the battery pack 200 according to the embodiment of the third aspect of the present application.

[0075] The vehicle 300 according to the embodiment of the present application uses the battery pack 200, so that the safety of use of the vehicle 300 can be easily ensured.

[0076] The remaining configuration and operation of vehicle 300 according to embodiments of the present application are known to those skilled in the art and will not be described in detail herein.

[0077] In the description of this application, orientations or positional relationships indicated by terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" are based on orientations or positional relationships shown in the drawings and are intended merely to facilitate and simplify the description of this application. They do not indicate or suggest that the depicted devices or elements must have a specific orientation, be configured, and operate in a specific orientation, and should not be understood as limiting this application. Furthermore, features qualified by "first" or "second" may explicitly or implicitly include one or more of the same feature. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0078] In the description of this application, unless otherwise clearly specified or limited, the terms "attach," "couple," and "connect" should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, a connection via an intermediate medium, or communication between two parts. Those skilled in the art can understand the specific meanings of the above terms in this application according to specific circumstances.

[0079] In the description herein, the use of a reference term such as "one embodiment," "some embodiments," "exemplary embodiments," "example," "particular examples," or "some examples" means that the specific features, structures, materials, or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present application. In the description herein, the exemplary use of the term does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples, as appropriate.

[0080] Although embodiments of the present application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purpose of the present application, and that the scope of the present application is limited by the claims and their equivalents. [Explanation of symbols]

[0081] 100 Battery Tray 1 Tray bottom plate 11 Main body 110 Containment Room 111 Bottom wall 112 Side wall 12 Flange 120 through hole 121 Sub-flange 2 tray frame 21 Frame section 22 Support part 3 batteries 4 Top cover 5 Fasteners 200 battery packs 300 vehicles

Claims

1. A tray bottom plate (1) for a battery, comprising a main body portion (11) and a flange portion (12), The body (11) includes a bottom wall (111) and a side wall (112), the side wall (112) is disposed around the bottom wall (111), and the side wall (112) and the bottom wall (111) together define a storage chamber (110) for storing a battery (3), and the thickness of the bottom wall (111) is t １ and 1 mm≦t １ ≦3 mm, The flange portion (12) is installed on the edge of the side wall (112), the flange portion (12) is arranged around the side wall (112), and the thickness of the flange portion (12) is t ２ and t ２ >t １ and A tray bottom plate (1) for a battery, characterized in that 2×t 1 ≦t 2 ≦3×t 1 .

2. The thickness of the side wall (112) is t ３ and t ３ = t １ 2. The tray bottom plate (1) for batteries according to claim 1, characterized in that:

3. 2. The tray bottom plate (1) for batteries according to claim 1, wherein the depth of the chamber (110) is t, and 15 mm≦t≦45 mm.

4. 2. The tray bottom plate (1) for batteries according to claim 1, wherein the included angle between the side wall (112) and the bottom wall (111) is α, and 100°≦α≦120°.

5. A through hole (120) is formed in the flange portion (12), and the diameter of the through hole (120) is D, and d≦D≦min {10×t ２ , w / 3}, d is a diameter of a fastener (5) that passes through the through hole (120) and is fixedly connected to the tray frame (2), and w is a width of the flange portion (12).

6. The battery tray bottom plate (1) according to claim 5, characterized in that the flange portion (12) includes a plurality of sub-flanges (121), and the plurality of sub-flanges (121) are connected in sequence end-to-end.

7. 7. The tray bottom plate (1) for a battery according to claim 6, characterized in that a plurality of through holes (120) are formed in each of the sub-flanges (121), and the plurality of through holes (120) in each of the sub-flanges (121) are spaced apart along the length direction of the sub-flange (121) and / or the width direction of the sub-flange (121).

8. 2. The tray bottom plate (1) for batteries according to claim 1, characterized in that the tray bottom plate (1) is a one-piece molding.

9. The tray bottom plate (1) for a battery according to claim 1, characterized in that the material of the tray bottom plate (1) is a composite material.

10. A battery tray (100) comprising a tray bottom plate (1) for a battery according to any one of claims 1 to 9 and a tray frame (2), The battery tray (100) is characterized in that the tray frame (2) is installed below the flange portion (12) and fixedly connected to the tray bottom plate (1).

11. A battery tray (100) including a tray bottom plate (1) for a battery and a tray frame (2), The battery tray bottom plate (1) includes a main body portion (11) and a flange portion (12), The body (11) includes a bottom wall (111) and a side wall (112), the side wall (112) is disposed around the bottom wall (111), and the side wall (112) and the bottom wall (111) together define a storage chamber (110) for storing a battery (3), and the thickness of the bottom wall (111) is t 1 , and 1 mm≦t 1 ≦3 mm; The flange portion (12) is installed on the edge of the side wall (112), the flange portion (12) is arranged around the side wall (112), and the thickness of the flange portion (12) is t 2 , where t 2 > t 1 ; The battery tray (100) is characterized in that the tray frame (2) is installed below the flange portion (12) and fixedly connected to the tray bottom plate (1).

12. The flange portion (12) has a through hole (120) formed therein. The battery tray (100) of claim 11, further comprising a fastener (5), the fastener (5) passing through the through hole (120) and fixedly connected to the tray frame (2).

13. 12. The battery tray (100) of claim 11, wherein the tray frame (2) includes a frame portion (21), the frame portion (21) is disposed around the side wall (112), and the frame portion (21) is fixedly connected to the side wall (112) and the flange portion (12).

14. The battery tray (100) according to claim 13, characterized in that the frame portion (21) is glued to the side wall (112) and the flange portion (12).

15. The battery tray (100) according to claim 13, wherein the tray frame (2) further includes a support portion (22), which is installed on a side of the frame portion (21) adjacent to the storage chamber (110) and supports the bottom of the bottom wall (111).

16. The battery tray (100) according to claim 15, characterized in that the support (22) is glued to the bottom wall (111).

17. The width of the frame portion (21) is w １ and the width of the support portion (22) is w ２ And w ２ ≧2×w １ 16. The battery tray (100) of claim 15, wherein the battery tray (100) is 1 / 3.

18. A battery pack (200) including at least one battery (3), a top cover (4), and the battery tray (100) according to claim 11, characterized in that the top cover (4) is arranged on the open side of the storage chamber (110), and the top cover (4) defines an installation space together with the tray bottom plate (1), and the at least one battery (3) is installed in the installation space.

19. 20. The battery pack (200) according to claim 18, wherein the depth of the storage chamber (110) is t, the height of each battery (3) is h, and h / 4≦t≦h / 3.

20. A vehicle (300) including the battery pack (200) of claim 18.

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