Battery pack box body, battery pack, power utilization device and method for manufacturing battery pack box body

Abstract

The invention provides a battery pack box body, a battery pack, a power utilization device and a method for manufacturing the battery pack box body, and belongs to the technical field of batteries. The battery pack box comprises a bottom plate; the side wall assembly extends in a surrounding mode in the circumferential direction of the bottom plate and is connected to the bottom plate; at least a portion of the moldable material assembly extends in a circumferential direction of the sidewall assembly to provide support on an inner side and an outer side of the sidewall assembly; and the composite material part extends along the circumferential direction of the side wall assembly and forms a cavity capable of accommodating a battery cell of the battery pack on the inner side of the side wall assembly.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and particularly to a battery pack box body, a battery pack, an electrical device, and a method for manufacturing a battery pack box body. Background Art

[0002] In the field of new energy technologies, the battery pack box body, as a support and protection structure for the battery cells of the battery pack, has always received much attention.

[0003] The battery pack box body generally includes a top plate, various metal profile brackets, bolts and other mechanical components, which can effectively play the roles of support, anti-mechanical shock and environmental protection (such as waterproofing and dustproofing).

[0004] However, forming the box body with various metal profile brackets through forms such as welding and screwing often leads to a series of problems, such as high overall quality of the box body, relatively complex manufacturing process, poor heat preservation effect of the battery pack box body, etc. Summary of the Invention

[0005] In view of the above problems, this application provides a battery pack box body, a battery pack, an electrical device, and a method for manufacturing a battery pack box body, aiming to alleviate, reduce or eliminate at least one of a series of problems caused by forming the box body with metal profile brackets.

[0006] In a first aspect, this application provides a battery pack box body, including: a bottom plate; a side wall assembly that extends circumferentially around the bottom plate and is connected to the bottom plate; a formable material assembly, at least a part of which extends circumferentially along the side wall assembly to provide support inside and outside the side wall assembly; and a composite material part that extends circumferentially along the side wall assembly and forms a cavity inside the side wall assembly for accommodating the battery cells of the battery pack.

[0007] In the technical solution of the embodiments of this application, by using the formable material assembly and the composite material part, it becomes possible to alleviate, reduce or eliminate at least one of a series of problems caused by forming the box body with metal profile brackets. For example, since the density of the formable material assembly and the composite material part is usually lower than that of the metal profile, the overall weight of the battery pack box body can be reduced, thereby promoting the lightweight of the battery pack box body. Also, for example, the heat conduction efficiency of the formable material assembly and the composite material part is generally lower than that of the metal profile, which can improve the heat preservation effect of the battery pack box body, thereby alleviating the problem of poor heat preservation effect of the battery pack box body.

[0008] In some embodiments, the sidewall assembly includes a first sidewall member and a third sidewall member, which are opposite to each other in a first direction; and a second sidewall member and a fourth sidewall member, which are opposite to each other in a second direction, the second direction intersecting the first direction, wherein the first sidewall member, the second sidewall member, the third sidewall member, and the fourth sidewall member are sequentially connected. In such a design, a frame-shaped sidewall assembly can be formed, and the manufacturing is simple.

[0009] In some embodiments, the formable material assembly includes: a first formable material member and a third formable material member, which are opposite to each other in a first direction, wherein the first formable material member and the third formable material member are laid on the bottom plate, and the first formable material member and the third formable material member are used to fit against the outer wall surfaces of the first sidewall member and the third sidewall member; and a second formable material member and a fourth formable material member, which are opposite to each other in a second direction, wherein the second formable material member and the fourth formable material member are used to fit against the inner wall surfaces of the second sidewall member and the fourth sidewall member. By arranging the first formable material member and the third formable material member to fit against the outer wall surfaces of the first sidewall member and the third sidewall member and arranging the second formable material member and the fourth formable material member to fit against the inner wall surfaces of the second sidewall member and the fourth sidewall member, the lateral stiffness of the battery pack box can be enhanced.

[0010] In some embodiments, the formable material assembly further includes a fifth formable material member, which is laid on the bottom plate. By laying the fifth formable material member on the bottom plate, the vertical stiffness of the battery pack box can be enhanced.

[0011] In some embodiments, the fifth formable material member includes: a first formable material portion, a second formable material portion, and a third formable material portion, which are laid on the bottom plate at intervals of two. By dividing the fifth formable material member into three mutually spaced parts, the material usage of the formable material member can be saved, thereby further reducing the cost.

[0012] In some embodiments, the composite material member, the bottom plate, and the first sidewall member define a first accommodation space for accommodating the first formable material member, and the composite material member, the bottom plate, and the third sidewall member define a second accommodation space for accommodating the third formable material member. In such a design, the possibility of the first formable material member and the third formable material member detaching from the battery pack box after integral molding is reduced, thereby increasing the reliability of the battery pack box.

[0013] In some embodiments, the composite material part and the second side wall part define a third accommodation space for accommodating a second formable material part, and the composite material part and the fourth side wall part define a fourth accommodation space for accommodating a fourth formable material part. In such a design, this reduces the possibility of the second formable material part and the fourth formable material part detaching from the battery pack box body after integral molding, thereby increasing the reliability of the battery pack box body.

[0014] In some embodiments, a part of the composite material part also covers the formable material assembly. Since the composite material part has high strength but relatively low stiffness and a large deformation amount, while the formable material assembly has high stiffness but relatively low strength, therefore, through the combined use of the two, the overall stiffness of the box body can be enhanced without reducing the overall strength of the box body.

[0015] In some embodiments, the composite material part includes: a bottom wall; a frame wall disposed on the bottom wall, and the bottom wall and the frame wall enclose a cavity for the battery cell; and at least one spacer, the at least one spacer is disposed inside the cavity along a second direction, and the at least one spacer extends along a first direction to divide the interior of the cavity into a plurality of chambers arranged along the second direction. By using at least one spacer to divide the interior of the cavity into a plurality of chambers, space can be reserved for arranging a plurality of battery cells side by side.

[0016] In some embodiments, the battery pack box body further includes at least one end plate, and each end plate in the at least one end plate is used to be inserted on a corresponding spacer in the at least one spacer. By inserting the end plate on the spacer, the strength of the spacer can be enhanced, and it can be further used for internally mounting bolts.

[0017] In some embodiments, the battery pack box body further includes a top plate for connecting to the side wall assembly to enclose the cavity of the battery cell. By providing the top plate, it can play a role in enclosing the cavity of the battery cell, and the top plate can be further fixedly connected to other fixing parts, such as the vehicle body frame.

[0018] In some embodiments, the formable material assembly and the composite material part are integrally molded. In such a design, the manufacturing process of the battery pack box body can be reduced, and the process cost can be lowered.

[0019] In some embodiments, the composite material part is selected from at least one of glass fiber or carbon fiber. In such a design, this makes the density of the composite material part smaller, thereby reducing the overall weight of the battery pack box body.

[0020] In a second aspect, the present application provides a battery pack, including: a battery cell; and the battery pack box body in the above embodiments, and the battery cell is disposed inside the cavity.

[0021] Such a battery pack can provide the advantages described above regarding the battery pack housing. For the sake of brevity, they will not be repeated here.

[0022] In a third aspect, the present application provides an electrical device, which includes the battery pack in the above embodiments, and the battery pack is used to provide electrical energy.

[0023] Such an electrical device can provide the advantages described above regarding the battery pack housing. For the sake of brevity, they will not be repeated here.

[0024] In a fourth aspect, the present application provides a method for manufacturing a battery pack housing, including: laying a bottom plate at the bottom of a mold; laying a side wall assembly on the bottom plate; laying a part of a formable material assembly on the bottom plate and surrounding the side wall assembly; laying a composite material part on the side wall assembly and the formable material assembly; and integrally molding the laid bottom plate, side wall assembly, formable material assembly, and composite material part.

[0025] Such a method for manufacturing a battery pack housing can provide the advantages described above regarding the battery pack housing. For the sake of brevity, they will not be repeated here.

[0026] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented in accordance with the content of the specification. And in order to make the above and other purposes, features, and advantages of the present application more obvious and understandable, the following specifically illustrates the specific embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. Moreover, in all the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0028] Figure 1 is an exploded view of the battery pack housing of some embodiments of the present application;

[0029] Figure 2 is an exploded view of the side wall assembly of some embodiments of the present application;

[0030] Figure 3 is a structural view of the formable material assembly of some embodiments of the present application;

[0031] Figure 4 is Figure 1 a top view of the battery pack housing;

[0032] Figure 5 is along Figure 4Cross-sectional view of the battery pack housing taken along section line A-A;

[0033] Figure 6 is Figure 5 Enlarged schematic view of local part C;

[0034] Figure 7 is Figure 4 Cross-sectional view of the battery pack housing taken along section line B-B;

[0035] Figure 8 is Figure 7 Enlarged schematic view of local part D;

[0036] Figure 9 Schematic structural view of the composite material part in some embodiments of the present application;

[0037] Figure 10 Schematic structural view of a partial battery pack in some embodiments of the present application;

[0038] Figure 11 Schematic structural view of a vehicle in some embodiments of the present application.

[0039] Figure 12 Flowchart of a method for manufacturing a battery pack housing in some embodiments of the present application.

[0040] The reference numerals in the specific embodiments are as follows:

[0041] First direction X, second direction Y;

[0042] Battery pack housing 100, bottom plate 110, formable material assembly 120, side wall assembly 130, composite material part 140, end plate 150, top plate 160, battery pack 170, battery cell 180, cavity 190;

[0043] First side wall part 200, second side wall part 210, third side wall part 220, fourth side wall part 240;

[0044] First formable material part 300, second formable material part 310, third formable material part 330, fourth formable material part 340, fifth formable material part 350, first formable material portion 360, second formable material portion 370, third formable material portion 380;

[0045] First accommodation space 500, second accommodation space 510;

[0046] Third accommodation space 700, fourth accommodation space 710;

[0047] Bottom wall 900, frame wall 910, spacer 920, chamber 930;

[0048] Battery pack 1000, electrical device 1100. Detailed implementation manners

[0049] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of the present application more clearly, and therefore are only examples and cannot be used to limit the protection scope of the present application.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0051] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise specifically defined.

[0052] Referring to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0053] In the description of the embodiments of this application, the term "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0054] In the description of the embodiments of this application, the term "a plurality of" refers to two or more (including two). Similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0055] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical 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", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of the present application.

[0056] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "install", "connect", "couple", "fix", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0057] In the description of the embodiments of the present application, flowcharts are used to illustrate the operations performed by the system according to the embodiments of the present disclosure. It should be understood that the operations before or after do not necessarily need to be executed precisely in sequence. On the contrary, they can be executed in reverse order or simultaneously. At the same time, other operations can also be added to these processes, or one or several operations can be removed from these processes.

[0058] Currently, a battery pack box body serving as a support and protection structure for the battery cells of a battery pack is manufactured by welding and screwing various metal profile brackets.

[0059] If only various metal profile brackets are used to make the battery pack box body, the overall mass of the battery pack box body is often relatively high, and since the heat conduction efficiency of the metal is relatively high, the heat preservation effect of the battery pack box body is poor, which may in turn affect the battery service life.

[0060] In order to alleviate, mitigate or eliminate at least one of the series of problems caused by the metal profile brackets forming the box body, a formable material component and a composite material component can be used. For example, since the density of the formable material component and the composite material component is generally lower than the density of the metal profile, the overall weight of the battery pack box body can be reduced, thereby promoting the lightweight of the battery pack box body. Another example is that the heat conduction efficiency of the formable material component and the composite material component is generally also lower than the heat conduction efficiency of the metal profile, which can improve the heat preservation effect of the battery pack box body, which is beneficial for the battery pack to work at high and low temperatures and extends the battery service life.

[0061] Based on the above considerations, a battery pack housing is designed to alleviate, mitigate, or eliminate at least one of a series of problems caused by a housing composed of metal profile brackets by adopting formable material components and composite material parts.

[0062] The battery pack housing disclosed in the embodiments of the present application can be used in a battery. A power supply system of the electrical device can be composed of the battery pack housing disclosed in the present application.

[0063] Refer to Figure 1 , and further refer to Figures 2 to 8 . Figure 1 FIG. is an exploded schematic view of a battery pack housing 100 according to some embodiments of the present application; Figure 2 FIG. is an exploded schematic view of a side wall assembly 130 according to some embodiments of the present application; Figure 3 FIG. is a structural schematic view of a formable material component 120 according to some embodiments of the present application; Figure 4 For Figure 1 the top view of the battery pack housing 100; Figure 5 For the sectional view of the battery pack housing 100 taken along the section line A-A of Figure 4 ; Figure 6 For Figure 5 the enlarged schematic view of the partial C of Figure 7 ; For the sectional view of the battery pack housing 100 taken along the section line B-B of Figure 4 ; Figure 8 For Figure 7 the enlarged schematic view of the partial D of. The battery pack housing 100 includes a bottom plate 110, a side wall assembly 130, a formable material component 120, and a composite material part 140. The side wall assembly 130 extends circumferentially around the bottom plate 110 and is connected to the bottom plate 110. The first side wall member 200, the second side wall member 210, the third side wall member 220, and the fourth side wall member 240 are sequentially connected. At least a part of the formable material component 120 extends circumferentially along the side wall assembly 130 to provide support on the inner and outer sides of the side wall assembly 130. The composite material part 140 extends circumferentially along the side wall assembly 130 and forms a cavity 190 for accommodating the battery cells 180 of the battery pack 170 on the inner side of the side wall assembly 130.

[0064] As shown in the figure, in the figure, the first direction X is the width direction of the battery pack housing 100, and the second direction Y is the length direction of the battery pack housing 100.

[0065] In this article, the term "formable material" refers to a material that can be manually deformed, and after deformation, it can maintain a definite shape and can then be manually transformed back to its original shape. In some embodiments, the formable material can include PET foam, etc. In some embodiments, the density of PET foam is 0.055 - 0.3 g / cm 3Within a certain range, by comparing the density of metals (such as aluminum alloy 2.75 g / cm 3 ), the overall weight of the battery pack housing can be reduced. In addition, the PET foam has strong heat insulation performance, which can improve the heat preservation performance of the battery pack housing.

[0066] By adopting formable material components and composite material parts, since the density of the formable material components and composite material parts is lower than that of metal profiles, the overall weight of the battery pack housing can be reduced, thereby promoting the lightweight of the battery pack housing. In addition, the heat conduction efficiency of the formable material components and composite material parts is also lower than that of metal profiles, which can improve the heat preservation effect of the battery pack housing.

[0067] According to some embodiments of the present application, the side wall assembly 130 includes a first side wall member 200 and a third side wall member 220, and the first side wall member 200 and the third side wall member 220 are opposite to each other in the first direction X. The side wall assembly 130 further includes a second side wall member 210 and a fourth side wall member 240, and the second side wall member 210 and the fourth side wall member 240 are opposite to each other in the second direction Y, and the second direction Y intersects with the first direction X.

[0068] As Figure 2 shown, the side wall assembly 130 can be composed of four separate independent components, namely the first side wall member 200, the second side wall member 210, the third side wall member 220, and the fourth side wall member 240. In some embodiments, the first side wall member 200, the second side wall member 210, the third side wall member 220, and the fourth side wall member 240 can be fixedly connected to each other in sequence by welding, so as to form the side wall assembly 130 similar to a rectangular frame. However, it can be understood that the first side wall member 200, the second side wall member 210, the third side wall member 220, and the fourth side wall member 240 can also be integrally formed, and the present disclosure does not limit this. According to some embodiments of the present application, the side wall assembly 130 can include an aluminum profile frame. In the example as Figure 6 shown, the side wall assembly 130 can have three rectangular profile cavities.

[0069] In such a design, a side wall assembly in the shape of a frame can be simply manufactured.

[0070] Please continue to refer to Figures 3 to 8According to some embodiments of the present application, the formable material assembly 120 includes a first formable material piece 300 and a third formable material piece 330. The first formable material piece 300 and the third formable material piece 330 are opposite to each other in the first direction X. The first formable material piece 300 and the third formable material piece 330 are laid on the bottom plate 110. The first formable material piece 300 and the third formable material piece 330 are used to fit with the outer wall surfaces of the first side wall piece 200 and the third side wall piece 220. The formable material assembly 120 further includes a second formable material piece 310 and a fourth formable material piece 340. The second formable material piece 310 and the fourth formable material piece 340 are opposite to each other in the second direction Y. The second formable material piece 310 and the fourth formable material piece 340 are used to fit with the inner wall surfaces of the second side wall piece 210 and the fourth side wall piece 240.

[0071] In Figure 3 the illustrated example, the formable material assembly 120 includes four separate formable material pieces, namely, a first formable material piece 300, a second formable material piece 310, a third formable material piece 330, and a fourth formable material piece 340, which together form four side wall regions of the formable material assembly 120.

[0072] In Figure 5 and Figure 6 the illustrated example, the first formable material piece 300 fits with the outer wall surface of the first side wall piece 200, and the third formable material piece 330 fits with the outer wall surface of the third side wall piece 220. In Figure 7 and Figure 8 the illustrated example, the second formable material piece 310 fits with the inner wall surface of the second side wall piece 210, and the fourth formable material piece 340 fits with the inner wall surface of the fourth side wall piece 240.

[0073] By arranging the first formable material piece and the third formable material piece to fit with the outer wall surfaces of the first side wall piece and the third side wall piece and arranging the second formable material piece and the fourth formable material piece to fit with the inner wall surfaces of the second side wall piece and the fourth side wall piece, this can enhance the lateral stiffness of the battery pack box body.

[0074] According to some embodiments of the present application, the formable material assembly 120 further includes a fifth formable material piece 350. The fifth formable material piece 350 is laid on the bottom plate 110.

[0075] In Figures 5 - 7 the illustrated example, a fifth formable material piece 350 is arranged on the bottom plate 110.

[0076] By laying the fifth formable material piece on the bottom plate, this can enhance the vertical stiffness of the battery pack box body.

[0077] According to some embodiments of the present application, the fifth formable material part 350 includes a first formable material part 360, a second formable material part 370, and a third formable material part 380. The first formable material part 360, the second formable material part 370, and the third formable material part 380 are laid on the bottom plate 110 at intervals.

[0078] In Figure 3 the illustrated example, the fifth formable material part 350 includes the first formable material parts 360 on both sides, the third formable material part 380, and the second formable material part 370 therebetween. However, it can be understood that the first formable material part 360, the second formable material part 370, and the third formable material part 380 can also be integrally formed, and the present disclosure does not limit this.

[0079] By dividing the fifth formable material part into three spaced-apart parts, this can save the material usage of the formable material part, thereby further reducing costs.

[0080] Continuing to refer to Figure 5 and Figure 6 . In some embodiments, the composite material part 140, the bottom plate 110, and the first side wall part 200 define a first accommodation space 500. The first accommodation space 500 is used to accommodate the first formable material part 300. The composite material part 140, the bottom plate 110, and the third side wall part 220 define a second accommodation space 510. The second accommodation space 510 is used to accommodate the third formable material part 330.

[0081] In Figure 6 the illustrated example, the composite material part 140, the bottom plate 110, and the first side wall part 200 enclose the first accommodation space 500, and the first formable material part 300 is installed in the first accommodation space 500.

[0082] In such a design, this reduces the possibility of the first formable material part and the third formable material part detaching from the battery pack box body after integral molding, thereby increasing the reliability of the battery pack box body.

[0083] Continuing to refer to Figure 7 and Figure 8 , the composite material part 140 and the second side wall part 210 define a third accommodation space 700. The third accommodation space 700 is used to accommodate the second formable material part 310. The composite material part 140 and the fourth side wall part 240 define a fourth accommodation space 710. The fourth accommodation space 710 is used to accommodate the fourth formable material part 340.

[0084] In Figure 8In the illustrated example, the composite material part 140 and the second side wall part 210 enclose a third accommodation space 700, and the second formable material part 310 is installed in the third accommodation space 700.

[0085] In such a design, this reduces the possibility of the second formable material part and the fourth formable material part detaching from the battery pack box body after integral molding, thereby increasing the reliability of the battery pack box body.

[0086] According to some embodiments of the present application, a part of the composite material part 140 also covers the formable material assembly 120.

[0087] In Figure 6 the illustrated example, the composite material part covers the first formable material part 300 and the fifth formable material part 350 of the formable material assembly 120. In Figure 7 the illustrated example, the composite material part covers the second formable material part 310 and the fifth formable material part 350 of the formable material assembly 120.

[0088] Since the composite material part has high strength but relatively low stiffness and a large deformation amount, while the formable material assembly has high stiffness but relatively low strength, therefore, by using the two in combination, the overall stiffness of the box body can be enhanced without reducing the overall strength of the box body.

[0089] Further referring to Figure 9 , Figure 9 is a schematic structural diagram of the composite material part 140 according to some embodiments of the present application. The composite material part 140 includes a bottom wall 900, a frame wall 910, and at least one spacer 920. The frame wall 910 is disposed on the bottom wall. The bottom wall 900 and the frame wall 910 enclose a cavity 190 for the battery cell 180. At least one spacer 920 is disposed inside the cavity 190 along the second direction Y. At least one spacer 920 extends along the first direction X to divide the interior of the cavity 190 into a plurality of chambers 930 arranged along the second direction Y.

[0090] In Figure 9 the illustrated example, four spacers 920 divide the interior of the cavity 190 into three chambers 930 arranged along the second direction Y for the battery cell 180 to be inserted.

[0091] According to some embodiments of the present application, the bottom wall 900 and the frame wall 910 are made of long fiber composite materials, while at least one spacer 920 is made of short fiber composite materials.

[0092] By using at least one spacer to divide the interior of the cavity into a plurality of chambers, space can be reserved for a plurality of battery cells to be arranged side by side.

[0093] According to some embodiments of the present application, the battery pack housing 100 further includes at least one end plate 150. Each end plate in the at least one end plate 150 is used to be inserted on a corresponding spacer in the at least one spacer 920.

[0094] In Figure 8 the illustrated example, the end plate 150 is sleeved on the spacer 920 of the composite material member 140 on the outside of the spacer 920.

[0095] By inserting the end plate on the spacer, the strength of the spacer can be enhanced and it can be further used for internally mounting bolts.

[0096] Continuing to refer to Figure 1 , the battery pack housing 100 further includes a top plate 160. The top plate 160 is used to be connected to the side wall assembly 130 to enclose the cavity 190 of the battery cell 180.

[0097] In Figure 6 the illustrated example, both the top plate 160 and the bottom plate 110 can be fixed to the side wall assembly 130 (for example, the first side wall member 200) by bolts.

[0098] By providing the top plate, it can play a role in enclosing the cavity of the battery cell, and the top plate can be further fixedly connected to other fixing members, such as the vehicle body frame.

[0099] According to some embodiments of the present application, the formable material assembly 120 and the composite material member 140 are integrally formed by molding.

[0100] According to some embodiments of the present application, the formable material assembly 120 and the composite material member 140 can be placed in a mold and then integrally formed by molding.

[0101] In such a design, the manufacturing process of the battery pack housing can be reduced and the process cost can be lowered.

[0102] According to some embodiments of the present application, the composite material member 140 is selected from at least one of glass fiber or carbon fiber.

[0103] In some embodiments, the density of the composite material member 140 of glass fiber is in the range of 1.5 - 2.0 g / cm 3 . In some embodiments, the density of the composite material member 140 of carbon fiber is in the range of 1.0 - 1.5 g / cm 3 .

[0104] In such a design, this makes the density of the composite material member smaller, thereby reducing the overall weight of the battery pack housing.

[0105] According to some embodiments of the present application, referring to Figure 1, the present application provides a battery pack housing 100, which includes a bottom plate 110, a side wall assembly 130, a formable material assembly 120, and a composite material part 140. The side wall assembly 130 extends along the circumference of the bottom plate 110 and is connected to the bottom plate 110. The side wall assembly 130 includes a first side wall part 200 and a third side wall part 220, and the first side wall part 200 and the third side wall part 220 are opposite to each other in the first direction X. The side wall assembly 130 further includes a second side wall part 210 and a fourth side wall part 240, and the second side wall part 210 and the fourth side wall part 240 are opposite to each other in the second direction Y, and the second direction Y intersects with the first direction X. The first side wall part 200, the second side wall part 210, the third side wall part 220, and the fourth side wall part 240 are connected in sequence. At least a part of the formable material assembly 120 extends along the circumference of the side wall assembly 130 to provide support on the inner and outer sides of the side wall assembly 130. The composite material part 140 extends along the circumference of the side wall assembly 130 and forms a cavity 190 on the inner side of the side wall assembly 130 for accommodating the battery cells 180 of the battery pack 170. In addition, the composite material part 140, the bottom plate 110, and the first side wall part 200 define a first accommodation space 500. The first accommodation space 500 is used to accommodate the first formable material part 300. The composite material part 140, the bottom plate 110, and the third side wall part 220 define a second accommodation space 510. The second accommodation space 510 is used to accommodate the third formable material part 330. The composite material part 140 and the second side wall part 210 define a third accommodation space 700. The third accommodation space 700 is used to accommodate the second formable material part 310. The composite material part 140 and the fourth side wall part 240 define a fourth accommodation space 710. The fourth accommodation space 710 is used to accommodate the fourth formable material part 340.

[0106] Further referring to Figure 10 , Figure 10 is a schematic structural diagram of a partial battery pack 1000 according to some embodiments of the present application. The battery pack 1000 includes at least one battery cell 180. In some embodiments, the battery cell 180 is disposed inside the cavity 190.

[0107] In one example, the at least one battery cell 180 can be electrically connected to each other. In one example, the battery pack housing 100 is used to provide an accommodation space for the battery cell 180. In some embodiments, the battery pack housing 100 can be in various shapes, such as a cuboid, etc.

[0108] In some embodiments, each battery cell 180 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 180 can be in a cylindrical shape, a flat shape, a cuboid shape, or other shapes, etc.

[0109] In some embodiments, each battery cell 180 may be composed of multiple battery monomers connected in series, in parallel, or in a series-parallel combination. A series-parallel combination means that there are both series and parallel connections among multiple battery cells 180. The battery pack 1000 may further include other structures. For example, the battery pack 1000 may further include a busbar component for realizing electrical connection among multiple battery cells 180.

[0110] The specific structure and function of the battery pack housing 100 have been specifically described above. For the sake of brevity, they will not be elaborated here.

[0111] In some embodiments, the electrical device may include the battery pack 1000 of the above embodiments, and the battery pack 1000 is used to provide electrical energy. Examples of the electrical device may include, but are not limited to, electric vehicles, ships, spacecraft, etc. Among them, the spacecraft may include airplanes, rockets, space shuttles, and spaceships, etc.

[0112] For the convenience of description, a vehicle 1100 of an embodiment of the present application is taken as an example for illustration.

[0113] Please refer to Figure 11 , Figure 11 which is a schematic structural diagram of the vehicle 1100 according to some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid electric vehicle, or an extended-range electric vehicle, etc. The battery pack 1000 is disposed inside the vehicle 1100, and the battery pack 1000 may be disposed at the bottom, the head, or the tail of the vehicle 1100. In some embodiments, the battery pack 1000 may be used for power supply of the vehicle 1100. For example, the battery pack 1000 may serve as the operating power source of the vehicle 1100. The vehicle 1100 may further include a controller 1400 and a motor 1300. The controller 1400 is used to control the battery pack 1000 to supply power to the motor 1300, for example, to meet the working power requirements during the start, navigation, and driving of the vehicle 1100.

[0114] In some embodiments of the present application, the battery pack 1000 may not only serve as the operating power source of the vehicle 1100, but also serve as the driving power source of the vehicle 1100, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1100.

[0115] The electrical device uses the battery pack 1000 including the battery pack housing 100 of the above embodiments for energy supply. The specific structure and function of the battery pack housing 100 in the battery pack 1000 have been specifically described above.

[0116] Refer to Figure 12 , Figure 12A flowchart of a method 1200 for manufacturing a battery pack housing 100 according to some embodiments of the present application. The method 1200 includes steps S1210 to S1250.

[0117] Step S1210: Lay the bottom plate 110 at the bottom of the mold;

[0118] Step S1220: Lay the side wall assembly 130 on the bottom plate 110;

[0119] Step S1230: Partially lay the formable material assembly 120 on the bottom plate 110 and lay it around the side wall assembly 130;

[0120] Step S1240: Lay the composite material part 140 on the side wall assembly 130 and the formable material assembly 120; and

[0121] Step S1250: Integrally mold the laid bottom plate 110, side wall assembly 130, formable material assembly 120, and composite material part 140.

[0122] In the above step S1240, the composite material long fiber prepreg can be laid above the entire structure, and the short fiber prepreg can be arranged at the position of the internal cross beam.

[0123] In the above step S1250, integrally molding the battery pack housing 100 can reduce the manufacturing process of the battery pack housing and lower the process cost.

[0124] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered within the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery pack housing (100), characterized in that, Comprising: A bottom plate (110); A side wall assembly (130) that extends circumferentially around the bottom plate (110) and is connected to the bottom plate (110); A formable material assembly (120), at least a part of the formable material assembly (120) extends circumferentially along the side wall assembly (130) to provide support on the inner and outer sides of the side wall assembly (130); And A composite material part (140), the composite material part (140) extends circumferentially along the side wall assembly (130) and forms a cavity (190) on the inner side of the side wall assembly (130) for accommodating the battery cell (180) of the battery pack (170).

2. The battery pack housing (100) according to claim 1, characterized in that, The side wall assembly (130) includes: A first side wall part (200) and a third side wall part (220), the first side wall part (200) and the third side wall part (220) are opposite to each other in a first direction (X); and A second side wall part (210) and a fourth side wall part (240), the second side wall part (210) and the fourth side wall part (240) are opposite to each other in a second direction (Y), the second direction (Y) intersects with the first direction (X), wherein, the first side wall part (200), the second side wall part (210), the third side wall part (220) and the fourth side wall part (240) are sequentially connected.

3. The battery pack housing (100) according to claim 2, characterized in that, The formable material assembly (120) includes: A first formable material part (300) and a third formable material part (330), the first formable material part (300) and the third formable material part (330) are opposite to each other in the first direction (X), wherein, the first formable material part (300) and the third formable material part (330) are laid on the bottom plate (110), and the first formable material part (300) and the third formable material part (330) are used to fit with the outer wall surfaces of the first side wall part (200) and the third side wall part (220); and A second formable material part (310) and a fourth formable material part (340), the second formable material part (310) and the fourth formable material part (340) are opposite to each other in the second direction (Y), wherein, the second formable material part (310) and the fourth formable material part (340) are used to fit with the inner wall surfaces of the second side wall part (210) and the fourth side wall part (240).

4. The battery pack housing (100) according to claim 1, wherein, The formable material assembly (120) further includes a fifth formable material part (350), and the fifth formable material part (350) is laid on the bottom plate (110).

5. The battery pack housing (100) according to claim 4, characterized in that, The fifth formable material part (350) includes: A first formable material portion (360), a second formable material portion (370) and a third formable material portion (380), the first formable material portion (360), the second formable material portion (370) and the third formable material portion (380) are laid on the bottom plate (110) at intervals of two by two.

6. The battery pack housing (100) according to any one of claims 2-5, characterized in that, The composite material part (140), the bottom plate (110) and the first side wall part (200) define a first accommodation space (500) for accommodating the first formable material part (300), and the composite material part (140), the bottom plate (110) and the third side wall part (220) define a second accommodation space (510) for accommodating the third formable material part (330).

7. The battery pack housing (100) according to any one of claims 2-5, characterized in that, The composite material part (140) and the second side wall part (210) define a third accommodation space (700) for accommodating the second formable material part (310), and the composite material part (140) and the fourth side wall part (240) define a fourth accommodation space (710) for accommodating the fourth formable material part (340).

8. The battery pack housing (100) according to any one of claims 1-7, characterized in that, A part of the composite material part (140) also covers the formable material assembly (120).

9. The battery pack housing (100) according to any one of claims 2-8, characterized in that, The composite material part (140) includes: a bottom wall (900); a frame wall (910) disposed on the bottom wall, and the bottom wall (900) and the frame wall (910) enclose a cavity (190) of the battery cell (180); and at least one spacer (920) disposed inside the cavity (190) along the second direction (Y), and the at least one spacer (920) extends along the first direction (X) to divide the interior of the cavity (190) into a plurality of chambers (930) arranged along the second direction (Y).

10. The battery pack housing (100) according to claim 9, characterized in that, It further includes: at least one end plate (150), and each end plate in the at least one end plate (150) is used to be inserted on a corresponding spacer in the at least one spacer (920).

11. The battery pack housing (100) according to any one of claims 1-10, characterized in that, It further includes: a top plate (160) for connecting to the side wall assembly (130) to close the cavity (190) of the battery cell (180).

12. The battery pack housing (100) according to any one of claims 1-11, characterized in that, The formable material assembly (120) and the composite material part (140) are integrally formed by molding.

13. The battery pack housing (100) according to any one of claims 1-12, characterized in that, The composite material part (140) is selected from at least one of glass fiber or carbon fiber.

14. A battery pack (1000), characterized in that, It includes: a battery cell (180); and a battery pack box (100) according to any one of claims 1-13, and the battery cell (180) is disposed inside the cavity (190).

15. An electrical device (1100), characterized in that, The electrical device includes the battery pack (1000) according to claim 14, and the battery pack (1000) is used to provide electrical energy.

16. A method (1200) for manufacturing a battery pack housing (100), characterized in that, It includes: Laying the bottom plate (110) at the bottom of the mold; Laying the side wall assembly (130) on the bottom plate (110); Partially laying the formable material assembly (120) on the bottom plate (110) and laying it around the side wall assembly (130); Laying the composite material part (140) on the side wall assembly (130) and the formable material assembly (120); and Integrally mold the laid bottom plate (110), the side wall assembly (130), the formable material assembly (120), and the composite material part (140).

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