Battery pack and electric automobile

Abstract

The invention relates to a battery pack and an electric vehicle. The battery pack comprises a box body; the cooling plate is located below the box body in the height direction; and the bracket assembly is located below the cooling plate in the height direction and fixedly connected to the box body, and the bracket assembly is used for being in direct contact with a mounting plate of the electric automobile. When the battery pack is used for the electric vehicle, the cooling plate is separated from the mounting plate of the electric vehicle by the bracket assembly, so that the cooling plate does not need to directly exchange heat with the mounting plate, the influence of the temperature of the mounting plate on the cooling plate is reduced, and the cooling or heating efficiency of the cooling plate on the battery in the box body is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery pack and an electric vehicle. Background Technology

[0002] The ideal operating temperature of batteries in a battery pack is 20℃~35℃. However, in order to ensure the normal service life of batteries in extremely cold and hot environments, thermal management design must be implemented for the battery pack to regulate the operating temperature of the batteries through heating or cooling.

[0003] In order to regulate the operating temperature of the battery when the battery pack is working, the common practices of existing battery packs are: (1) installing a cooling plate inside the battery pack housing; (2) installing a cooling plate outside the battery pack housing.

[0004] For the cooling plate to be located inside the casing, the existing structure of the battery pack needs to be redesigned. The relatively limited space inside the casing places significant pressure on the design. Furthermore, if coolant leakage occurs in the cooling plate during long-term use, the coolant will cause two problems: firstly, it will create electrical connections between the battery casing and the metal parts of the casing, reducing the overall insulation resistance; secondly, the coolant will accelerate the corrosion of the metal parts of the casing, creating a safety hazard.

[0005] While placing the cooling plate outside the battery pack enclosure solves the problems of space utilization and the impact of coolant leakage on the battery pack's interior, when the battery pack is used in an electric vehicle, the cooling plate will be in direct contact with the vehicle's mounting plate. Since the temperature of the mounting plate is close to the external ambient temperature of the electric vehicle, when the electric vehicle is in extremely cold or hot environments, the mounting plate will also exchange heat with the cooling plate, thus reducing the cooling plate's efficiency in cooling or heating the battery inside the enclosure. Summary of the Invention

[0006] Based on this, and in view of the problems existing in the background art, the object of the present invention is to provide a battery pack and an electric vehicle, wherein the bracket assembly of the battery pack separates the cooling plate from the mounting plate of the electric vehicle, thereby reducing the impact of the temperature of the mounting plate on the cooling plate and improving the cooling or heating efficiency of the cooling plate.

[0007] To achieve the above objectives, the present invention provides a battery pack for an electric vehicle, comprising: a housing; a cooling plate located below the housing in the height direction; and a bracket assembly located below the cooling plate in the height direction and fixedly connected to the housing, wherein the bracket assembly is for direct contact with the mounting plate of the electric vehicle; the bracket assembly includes: at least two longitudinal beams spaced apart in the width direction; and at least two transverse beams spaced apart in the length direction, wherein the ends of the two transverse beams in the width direction are respectively fixedly connected to a corresponding longitudinal beam.

[0008] In one embodiment, the cooling plate has: a main body portion; and a plurality of first mounting portions, each first mounting portion protruding from the main body portion. Each longitudinal beam has: a plurality of second mounting portions formed on the side of the longitudinal beam facing the cooling plate, each second mounting portion cooperating with and being fixedly connected to a corresponding first mounting portion of the cooling plate.

[0009] In one embodiment, the cooling plate further includes a plurality of first mating portions formed on the side of the cooling plate facing the bracket assembly and spaced apart along the width direction. Each crossbeam further includes a plurality of second mating portions formed on the side of the crossbeam facing the cooling plate and spaced apart along the width direction, and each second mating portion engages with a corresponding first mating portion in a concave-convex fit.

[0010] In one embodiment, the first mating portions of the cooling plate are formed in a U-shape. The plurality of second mating portions of each crossbeam are formed in a serrated shape.

[0011] In one embodiment, each longitudinal beam further includes a plurality of third mounting portions formed on the side of the longitudinal beam facing the cooling plate and spaced apart along the length direction, each third mounting portion being fixedly connected to one end of a corresponding crossbeam.

[0012] In one embodiment, the bracket assembly further includes a protective beam, which is fixedly connected to the ends of the longitudinal beams in the longitudinal direction, for protecting the cooling plate in the longitudinal direction.

[0013] In one embodiment, each longitudinal beam further includes a fourth mounting portion formed on the side of the longitudinal beam facing the cooling plate and fixedly connected to a protective beam.

[0014] In one embodiment, the protective beam has: a flat plate portion arranged side-by-side with the at least two crossbeams; and a side plate portion that protrudes from the flat plate portion in the height direction and is located on one side of the cooling plate in the length direction to protect the cooling plate in the length direction.

[0015] In one embodiment, each longitudinal beam further includes: a support portion formed on one side of the longitudinal beam in the width direction and extending in the width direction; and a mounting portion formed on the other side of the longitudinal beam in the width direction and extending in the width direction.

[0016] This application also provides an electric vehicle that includes the battery pack described above.

[0017] The beneficial effects of the embodiments of this application are as follows: Since the bracket assembly separates the cooling plate from the mounting plate, the cooling plate does not need to directly exchange heat with the mounting plate, thereby reducing the impact of the mounting plate temperature on the cooling plate and improving the cooling or heating efficiency of the cooling plate on the battery inside the casing.

[0018] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0019] Figure 1 This is a perspective view of the battery pack according to the present invention.

[0020] Figure 2 yes Figure 1 The exploded diagram.

[0021] Figure 3 This is an assembly diagram of the cooling plate, bracket assembly, and thermal pad according to the present invention.

[0022] Figure 4 yes Figure 3 An exploded view, in which the cooling plate is a three-dimensional view seen from the front.

[0023] Figure 5 yes Figure 4 A 3D view of the cooling plate from the back.

[0024] Figure 6 yes Figure 4 A perspective view of the longitudinal beams of the bracket assembly from the front.

[0025] Figure 7 yes Figure 4 A perspective view of the longitudinal beams of the bracket assembly from the rear.

[0026] Figure 8 yes Figure 4 A perspective view of the crossbeam of the bracket assembly from the front.

[0027] Figure 9 yes Figure 4 A perspective view of the crossbeam of the bracket assembly from the back.

[0028] Figure 10 yes Figure 4 A three-dimensional view of the protective beam of the bracket assembly in the middle.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Box 315 support section

[0031] 11 Seventh mounting hole 316 mounting part

[0032] 2 Cooling plate 3161 connection hole

[0033] 21 Main body 317 Fixing holes

[0034] 22 First Installation Section 32 Crossbeam

[0035] 221 First mounting hole; 321 End of crossbeam

[0036] 23 First mating part 3211 Fifth mounting hole

[0037] 24 Extension section 322 Second mating section

[0038] 3 bracket assembly 33 protective beam

[0039] 31 Longitudinal beam 331 Sixth mounting hole

[0040] 311 Longitudinal beam end 332 Flat plate section

[0041] 312 Second mounting section 333 Side plate section

[0042] 3121 Second mounting hole 4 Thermal pad

[0043] 313 Third Installation Section S Fasteners

[0044] 3131 Third mounting hole W width direction

[0045] 314 Fourth Installation Section L Length Direction

[0046] 3141 Fourth mounting hole H height direction Detailed Implementation

[0047] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0049] In the description of the embodiments of this application, if the technical terms such as "first" and "second" appear, these terms are used only for descriptive purposes to distinguish different objects, and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0050] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0051] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0052] In the description of the embodiments of this application, if the term "multiple" appears, "multiple" means at least two (including two), such as two, three, etc., unless otherwise explicitly specified. Similarly, if the term "multiple sets" appears, "multiple sets" refers to two or more sets (including two sets), and if the term "multiple pieces" appears, "multiple pieces" refers to two or more pieces (including two pieces).

[0053] In the description of the embodiments of this application, if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0054] In the description of the embodiments of this application, unless otherwise explicitly specified and limited, the technical terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0055] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0056] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element present. Where applicable, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible embodiments. The battery pack and electric vehicle according to the present invention will now be described in detail with reference to the accompanying drawings.

[0057] Reference Figure 1 and Figure 2 The electric vehicle according to the present invention includes a mounting plate (not shown) and a battery pack. The mounting plate is used to mount the battery pack and is in direct contact with the battery pack.

[0058] Reference Figure 1 and Figure 2 The battery pack includes: a housing 1 housing a battery (not shown); a cooling plate 2 positioned below the housing 1 along the height direction H; and a bracket assembly 3 positioned below the cooling plate 2 along the height direction H and fixedly connected to the housing 1, with the bracket assembly 3 in direct contact with the mounting plate. Because the bracket assembly 3 separates the cooling plate 2 from the mounting plate, the cooling plate 2 does not need to directly exchange heat with the mounting plate, thereby reducing the impact of the mounting plate's temperature (especially when the electric vehicle is in extremely cold or hot environments) on the cooling plate 2, thus improving the cooling or heating efficiency of the cooling plate 2 for the battery inside the housing 1.

[0059] Reference Figure 2 The housing 1, cooling plate 2, and bracket assembly 3 are all independent components. When the cooling plate 2 fails, it can be replaced at any time.

[0060] During the use of the battery pack, in order to regulate the working temperature of the battery by the cooling plate 2, the cooling plate 2 generally has internal circulation of coolant. The regulation can be achieved by heating or stopping the heating of the coolant, or by setting a heating diaphragm on the cooling plate 2.

[0061] Reference Figure 1 and Figure 2 The battery pack housing 1 has multiple seventh mounting holes 11 on its exterior. The bracket assembly 3 is fixedly connected to the housing 1 using the multiple seventh mounting holes 11 and fasteners S.

[0062] Reference Figure 3 and Figure 4 The bracket assembly 3 may include: at least two longitudinal beams 31, spaced apart along the width direction W; and at least two transverse beams 32, spaced apart along the length direction L, wherein the ends 321 of the two transverse beams 32 in the width direction W are respectively fixedly connected to a corresponding longitudinal beam 31. The longitudinal beams 31 and the transverse beams 32 may be made of metal materials, such as stainless steel, aluminum, or aluminum alloy.

[0063] Here, the bracket assembly 3 is formed by connecting at least two longitudinal beams 31 and at least two transverse beams 32 to create a frame structure. This structure allows for airflow between the cooling plate 2 and the mounting plate. Since air has a very low thermal conductivity, this further reduces the heat transfer efficiency from the mounting plate to the cooling plate 2, minimizing the impact of the mounting plate's temperature on the coolant temperature within the cooling plate 2. This, in turn, helps improve the cooling or heating efficiency of the battery by the cooling plate 2. Furthermore, this frame structure has strong load-bearing capacity and impact resistance, enhancing the overall structural strength of the battery pack. During installation and handling, the bracket assembly 3 directly resists impacts or collisions from external objects (including the mounting plate) on the cooling plate 2, thus preventing damage from external forces. Therefore, the bracket assembly 3 provides excellent protection for the cooling plate 2. In addition, this frame structure helps save materials and significantly reduces costs.

[0064] Reference Figures 2 to 4 The number of longitudinal beams 31 can be two. However, it is not limited to this. In order to further enhance the overall strength of the bracket assembly 3, the number of longitudinal beams 31 can be appropriately increased.

[0065] The bracket assembly 3 supports and securely mounts the cooling plate 2 below it. (Refer to...) Figure 4 and Figure 5 The cooling plate 2 may have: a main body 21; and a plurality of first mounting portions 22, each first mounting portion 22 protruding from the main body 21. (Refer to...) Figure 3 , Figure 4 and Figure 6Each longitudinal beam 31 may have multiple second mounting portions 312 formed on the side of the longitudinal beam 31 facing the cooling plate 2. Each second mounting portion 312 cooperates with and is fixedly connected to a corresponding first mounting portion 22 of the cooling plate 2. During the assembly of the cooling plate 2 and the bracket assembly 3, the cooperation between each second mounting portion 312 and its corresponding first mounting portion 22 facilitates the rapid positioning of the cooling plate 2, thereby enabling rapid assembly of the cooling plate 2 and the bracket assembly 3.

[0066] To control the overall dimensions of the cooling plate 2 and the bracket assembly 3 along the height direction H, each second mounting portion 312 of each longitudinal beam 31 can engage with the corresponding first mounting portion 22 in a concave-convex fit. Specifically, each second mounting portion 312 can be a protrusion, and correspondingly, the corresponding first mounting portion 22 can be a groove. Alternatively, each second mounting portion 312 can be a groove (e.g., Figure 4 and Figure 6 As shown), correspondingly, the first mounting portion 22 is a protrusion (as shown). Figure 4 and Figure 5 (As shown).

[0067] Reference Figure 4 and Figure 5 The main body 21 has first mounting portions 22 protruding from both sides in the width direction W, and the first mounting portions 22 on the same side in the width direction W of the main body 21 are spaced apart.

[0068] Reference Figure 4 and Figure 5 The cooling plate 2 may also have an extension 24, which is formed on one side of the main body 21 in the length direction L and protrudes from the main body 21 in the width direction W. The two ends of the extension 24 in the width direction W may have first mounting portions 22 protruding in the length direction L, and second mounting portions 312 that cooperate with the first mounting portions 22 on the extension 24 are formed at the ends 311 of the longitudinal beams 31.

[0069] Reference Figure 3 The plurality of first mounting portions 22 of the cooling plate 2 can be fixedly connected to the second mounting portions 312 of each longitudinal beam 31 of the bracket assembly 3 by fasteners S. Specifically, refer to Figure 4 and Figure 5 Each first mounting portion 22 of the cooling plate 2 may be provided with a first mounting hole 221. (Refer to...) Figure 6 and Figure 7 Each second mounting portion 312 of each longitudinal beam 31 may be provided with a second mounting hole 3121. When assembling the cooling plate 2 and each longitudinal beam 31, each first mounting hole 221 of the cooling plate 2 and a corresponding second mounting hole 3121 of the longitudinal beam 31 are aligned vertically along the height direction H and a corresponding fastener S passes through to fix the cooling plate 2 and each longitudinal beam 31.

[0070] To ensure the reliability of the connection between the cooling plate 2 and the housing 1, the second mounting hole 3121 of the bracket assembly 3, each of the first mounting holes 221 of the cooling plate 2 and the corresponding seventh mounting hole 11 of the housing 1 are fixedly connected together by fasteners S.

[0071] Reference Figures 3 to 5 Because the tongue-and-groove mating method is simple, the cooling plate 2 can be fixedly connected to each crossbeam 32 of the bracket assembly 3 through the tongue-and-groove mating method, thereby facilitating the rapid assembly of the cooling plate 2 and the bracket assembly 3. Specifically, refer to... Figure 5 The cooling plate 2 may also have: a plurality of first mating portions 23, formed on the side of the cooling plate 2 facing the bracket assembly 3 and spaced apart along the width direction W. (Refer to...) Figure 4 , Figure 8 and Figure 9 Each crossbeam 32 may also have a plurality of second mating parts 322, formed on the side of the crossbeam 32 facing the cooling plate 2 and spaced apart along the width direction W, and each second mating part 322 has a concave-convex fit with a corresponding first mating part 23. Here, based on the concave-convex fit between each second mating part 322 of each crossbeam 32 and the corresponding first mating part 23 of the cooling plate 2, the relative movement between the cooling plate 2 and each crossbeam 32 along the width direction W is limited, so that the cooling plate 2 is firmly fixed on the bracket assembly 3, and the bracket assembly 3 is fixedly connected to the housing 1, thereby ensuring the reliability of the connection between the cooling plate 2 and the housing 1.

[0072] Each first mating portion 23 of the cooling plate 2 can be a protrusion, and correspondingly, each second mating portion 322 of each crossbeam 32 can be a groove. Alternatively, each first mating portion 23 of the cooling plate 2 can be a groove (e.g. Figure 5 As shown), correspondingly, each second mating part 322 of each crossbeam 32 is a protrusion (as shown). Figure 8 (As shown).

[0073] Reference Figure 5 Each of the first mating parts 23 of the cooling plate 2 can be formed into a U-shaped structure, and the plurality of first mating parts 23 are gradually diffused from the inside to the outside (i.e. formed into a radial structure).

[0074] Reference Figure 8 and Figure 9 The plurality of second mating parts 322 of each crossbeam 32 can be formed into a sawtooth structure and symmetrically distributed.

[0075] Reference Figure 3 , Figure 4 and Figure 6Each longitudinal beam 31 may also have a plurality of third mounting portions 313 formed on the side of the longitudinal beam 31 facing the cooling plate 2 and spaced apart along the length direction L. Each third mounting portion 313 is fixedly connected to one end 321 of the corresponding crossbeam 32. When assembling the at least two longitudinal beams 31 and at least two crossbeams 32 of the bracket assembly 3, each third mounting portion 313 of the longitudinal beam 31 is used to quickly position each crossbeam 32, thereby facilitating the rapid assembly of each longitudinal beam 31 and the plurality of crossbeams 32 into a single unit. Specifically, each third mounting portion 313 of the longitudinal beam 31 may be a groove, and each third mounting portion 313 receives and fixes one end 321 of the corresponding crossbeam 32, thereby reducing the overall dimensions of the cooling plate 2 and the bracket assembly 3 along the height direction H.

[0076] Reference Figure 3 Each crossbeam 32 can be fixedly connected to each longitudinal beam 31 by fasteners S. Specifically, refer to Figure 6 and Figure 7 Each of the third mounting portions 313 of each longitudinal beam 31 may be provided with a third mounting hole 3131. (Refer to...) Figure 8 and Figure 9 Each crossbeam 32 may have a fifth mounting hole 3211 at its end 321. When assembling the at least two longitudinal beams 31 and the at least two crossbeams 32, the fifth mounting hole 3211 of each crossbeam 32 and the third mounting hole 3131 of the corresponding longitudinal beam 31 are aligned vertically along the height direction H and allow a corresponding fastener S to pass through to fix the crossbeams 32 and the longitudinal beams 31.

[0077] Reference Figure 3 and Figure 4 The bracket assembly 3 may further include: a protective beam 33, which is fixedly connected to the ends 311 of each longitudinal beam 31 along the length direction L, for protecting the cooling plate 2 along the length direction L. The protective beam 33 may be made of a metal material, such as stainless steel, aluminum, or aluminum alloy.

[0078] The number of protective beams 33 can be one. When the battery pack is installed on the mounting plate, the end of the battery pack with the protective beam 33 along its length L is first placed on the mounting plate, and then the entire battery pack is pushed into the mounting plate along its length L. Thus, based on the setting of the protective beam 33, the cooling plate 2 is prevented from being damaged during the installation of the battery pack.

[0079] To quickly position the protective beam 33 so that it can be quickly installed at the ends 311 of each longitudinal beam 31, refer to Figure 6 and Figure 7Each longitudinal beam 31 may also have a fourth mounting portion 314, formed on the side of the longitudinal beam end 311 facing the cooling plate 2 and fixedly connected to the protective beam 33. Specifically, the fourth mounting portion 314 of each longitudinal beam 31 may be a groove, which accommodates and fixes the protective beam 33, thereby reducing the overall dimensions of the cooling plate 2 and the bracket assembly 3 along the height direction H.

[0080] It should be further noted that the fourth mounting part 314 on the same longitudinal beam 31 and the second mounting part 312 that cooperates with the first mounting part 22 on the extension 24 are respectively provided at the two longitudinal beam ends 311 in the length direction L of the longitudinal beam 31.

[0081] The protective beam 33 can be fixedly connected to the ends 311 of each longitudinal beam 31 using fasteners S. Specifically, refer to... Figure 6 and Figure 7 Each longitudinal beam 31 may be provided with a fourth mounting hole 3141 in its fourth mounting portion 314. (Refer to...) Figure 10 The protective beam 33 may be provided with a sixth mounting hole 331. When the protective beam 33 is assembled with each longitudinal beam 31, the sixth mounting hole 331 of the protective beam 33 and the fourth mounting hole 3141 of the corresponding longitudinal beam 31 are aligned vertically along the height direction H and a corresponding fastener S passes through to fix the protective beam 33 and each longitudinal beam 31.

[0082] Reference Figure 10 The protective beam 33 may have: a flat plate portion 332, arranged side-by-side with the at least two crossbeams 32; and a side plate portion 333, protruding from the flat plate portion 332 along the height direction H and located on one side of the length direction L of the cooling plate 2, to protect the cooling plate 2 along the length direction L. After the cooling plate 2 and the bracket assembly 3 are assembled, refer to... Figure 3 and Figure 4 The flat plate portion 332 of the protective beam 33, together with each crossbeam 32, is supported below the cooling plate 2, which enhances the overall structural strength of the bracket assembly 3. The side plate portion 333 of the protective beam 33 is located on one side of the length direction L of the cooling plate 2, so that the side plate portion 333 can protect the cooling plate 2 in the length direction L.

[0083] Reference Figure 6 and Figure 7 Each longitudinal beam 31 may also have a support portion 315, which is formed on one side of the longitudinal beam 31 in the width direction W and extends along the width direction W. The support portion 315 of each longitudinal beam 31 can be bonded to the housing 1 with structural adhesive, thereby improving the connection reliability between the cooling plate 2 and the housing 1 and helping to improve the overall structural strength of the battery pack.

[0084] Reference Figure 6 and Figure 7Each longitudinal beam 31 may also have a mounting portion 316, formed on the other side of the longitudinal beam 31 in the width direction W and extending along the width direction W. The mounting portion 316 of each longitudinal beam 31 can be used to achieve the connection and fixation between the battery pack and the electric vehicle.

[0085] Further reference Figure 6 and Figure 7 Each longitudinal beam 31 may be provided with a mounting portion 316 for a connection hole 3161. The connection hole 3161 is used for fasteners S to pass through in order to lock the battery pack to the electric vehicle.

[0086] Reference Figure 6 and Figure 7 Each longitudinal beam 31 may also be provided with a plurality of fixing holes 317, which are spaced apart along the length direction L, and each fixing hole 317 passes through the longitudinal beam 31 along the height direction H. The fixing holes 317 of each longitudinal beam 31 can be used to connect and fix the bracket assembly 3 to the battery pack housing 1 by means of fasteners S.

[0087] In order to quickly transfer the heat from the battery pack housing 1 to the cooling plate 2, refer to Figures 2 to 4 The battery pack may also include a thermal pad 4, disposed between the housing 1 and the cooling plate 2. The number of thermal pads 4 can be reasonably set according to the needs of the battery pack.

[0088] To ensure the flatness of the bottom of the bracket assembly 3 for reliable installation between the battery pack and the electric vehicle, the end of each second mounting hole 3121 away from the cooling plate 2 can be formed as a countersunk groove to accommodate the corresponding fastener S; the end of each fixing hole 317 away from the cooling plate 2 can also be formed as a countersunk groove to accommodate the corresponding fastener S. Figure 7 As shown.

[0089] Finally, it should be noted that the fixing holes 317 of each longitudinal beam 31 of the bracket assembly 3 are fixedly connected to the corresponding seventh mounting holes 11 of the housing 1 by fasteners S, realizing the first reliable connection between the bracket assembly 3 and the housing 1 of the battery pack; the first mounting holes 221 of the cooling plate 2, the second mounting holes 3121 of the corresponding longitudinal beam 31, and the corresponding seventh mounting holes 11 of the housing 1 are fixedly connected by fasteners S, realizing the second reliable connection between the bracket assembly 3 and the housing 1; the support parts 315 of each longitudinal beam 31 are bonded to the housing 1 with structural adhesive, realizing the third reliable connection between the bracket assembly 3 and the housing 1, thereby ensuring the connection reliability between the bracket assembly 3 and the housing 1. Since the bracket assembly 3 supports and fixes the cooling plate 2, the connection reliability between the cooling plate 2 and the housing 1 is also guaranteed.

[0090] The fastener S mentioned above can be a bolt, but is not limited to bolts.

[0091] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0092] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A battery pack for use in an electric vehicle, comprising: Box (1); as well as A cooling plate (2) is located below the housing (1) along the height direction (H), and the cooling plate is located outside the housing (1); characterized in that the battery pack further includes: The bracket assembly (3) is located below the cooling plate (2) along the height direction (H) and is fixedly connected to the housing (1), and the bracket assembly (3) is used to directly contact the mounting plate of the electric vehicle, and the bracket assembly (3) separates the cooling plate (2) from the mounting plate; The bracket assembly (3) includes: At least two longitudinal beams (31) are spaced apart along the width direction (W); and At least two crossbeams (32) are spaced apart along the length direction (L), and the ends (321) of the two crossbeams (32) in the width direction (W) of each crossbeam (32) are respectively fixedly connected to a corresponding longitudinal beam (31).

2. The battery pack according to claim 1, characterized in that, The cooling plate (2) has: a main body (21); and a plurality of first mounting portions (22), each of the first mounting portions (22) protruding from the main body (21); Each of the longitudinal beams (31) has a plurality of second mounting portions (312) formed on the side of the longitudinal beam (31) facing the cooling plate (2), and each second mounting portion (312) cooperates with and is fixedly connected to a corresponding first mounting portion (22) of the cooling plate (2).

3. The battery pack according to claim 1, characterized in that, The cooling plate (2) also has a plurality of first mating parts (23) formed on the side of the cooling plate (2) facing the bracket assembly (3) and spaced apart along the width direction (W); Each of the crossbeams (32) further comprises: a plurality of second mating portions (322) formed on the side of the crossbeam (32) facing the cooling plate (2) and spaced apart along the width direction (W), and each second mating portion (322) is in concave-convex engagement with a corresponding first mating portion (23).

4. The battery pack according to claim 3, characterized in that, Each of the first mating parts (23) of the cooling plate (2) is formed in a U-shaped structure; The plurality of second mating parts (322) of each of the crossbeams (32) are formed in a sawtooth structure.

5. The battery pack according to claim 1, characterized in that, Each of the longitudinal beams (31) further comprises: a plurality of third mounting portions (313) formed on the side of the longitudinal beam (31) facing the cooling plate (2) and spaced apart along the length direction (L), each of the third mounting portions (313) being fixedly connected to one end (321) of the corresponding crossbeam (32).

6. The battery pack according to claim 1, characterized in that, The bracket assembly (3) further includes a protective beam (33), which is fixedly connected to the ends (311) of each of the longitudinal beams (31) in the length direction (L) for protecting the cooling plate (2) in the length direction (L).

7. The battery pack according to claim 6, characterized in that, Each of the longitudinal beams (31) further comprises: a fourth mounting portion (314) formed on the side of the longitudinal beam end (311) facing the cooling plate (2) and fixedly connected to the protective beam (33).

8. The battery pack according to claim 6, characterized in that, The protective beam (33) has the following characteristics: A flat plate (332) is arranged side-by-side with at least two of the crossbeams (32); and The side plate portion (333) protrudes from the flat plate portion (332) along the height direction (H) and is located on one side of the length direction (L) of the cooling plate (2) to protect the cooling plate (2) in the length direction (L).

9. The battery pack according to claim 1, characterized in that, Each of the longitudinal beams (31) also has: The support portion (315) is formed on one side of the longitudinal beam (31) in the width direction (W) and extends along the width direction (W); as well as The mounting part (316) is formed on the other side of the longitudinal beam (31) in the width direction (W) and extends along the width direction (W).

10. An electric vehicle, characterized in that, The electric vehicle includes the battery pack according to any one of claims 1-9.

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