Battery pack

Abstract

The utility model provides a battery pack which comprises a box body in which a battery module is arranged; and the electrical bracket assembly comprises a BDU bracket which is arranged above the battery module and is fixedly connected with the battery module and the box body. According to the utility model, the strength of the BDU bracket can be greatly improved, the lightweight design of the BDU bracket is facilitated, the BDU bracket can be designed by adopting a thinner thickness, meanwhile, the BMS connecting brackets in the electrical bracket assembly are arranged in a layered manner, the battery management systems can be stacked, the convex hull space of the upper cover of the battery pack is fully utilized, and the BDU bracket is more compact in structure. The improvement of the battery energy density of the battery pack is facilitated; and the BMS bracket adopts the combined connection of the BMS support frame and the BMS connecting bracket, so that parts can be shared to the greatest extent, the production cost is reduced, and meanwhile, the lightweight design of the BMS bracket is also facilitated.

Description

Technical Field

[0001] This utility model belongs to the field of battery pack technology, and specifically relates to a battery pack. Background Technology

[0002] In existing electric vehicles, the power battery pack is the primary energy source, making it a crucial component. The BDU (Battery Disconnect Unit) is a vital part of the power battery pack, and the BDU bracket is its core load-bearing component. BDU modules are typically fixed within the battery pack using brackets. The design of the BDU bracket must not only meet the requirements for installation and removability within the constraints of battery pack space but also satisfy mechanical performance requirements such as vibration and impact resistance. Existing BDU bracket designs are mostly one or more plate-like structures, which suffer from relatively low structural strength, making them prone to breakage during vibration and impact. Furthermore, the design of existing BDU brackets and bracket assemblies often occupies excessive internal space to secure the BDU components, leading to a decline in the performance of the pouch battery. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of this utility model is to provide a battery pack to improve the existing BDU bracket design, which is mostly a one or more plate-shaped structure, which has the problem of low structural strength and easy bracket breakage during vibration and impact. In addition, the existing BDU bracket and bracket assembly design often occupies too much internal space in order to fix the BDU components, resulting in the degradation of the performance of the soft pack battery.

[0004] To achieve the above and other related objectives, this utility model proposes a battery pack, comprising:

[0005] The housing contains a battery module.

[0006] Electrical support assembly, the electrical support assembly comprising:

[0007] A battery pack break unit is mounted on the BDU bracket. The BDU bracket is installed above the battery module and is fixedly connected to the battery module and the housing.

[0008] In a preferred embodiment of this utility model, the BDU bracket is fixedly connected to the top cover of the battery module by adhesive, and both ends of the BDU bracket are fixedly connected to the side beams inside the housing.

[0009] In a preferred embodiment of this utility model, the BDU bracket is provided with multiple protruding ribs.

[0010] In a preferred embodiment of the present invention, the electrical support assembly further includes a BMS support, which is fixedly connected to the BDU support, and the BMS support includes multiple mounting parts along the height direction, each of which is equipped with a battery management system.

[0011] In a preferred embodiment of the present invention, the BDU bracket has a plurality of positioning protrusions distributed along its length direction, the BMS bracket is fixedly connected to two of the positioning protrusions near one side, and the battery pack circuit breaker unit is fixedly installed on the remaining positioning protrusions.

[0012] In a preferred embodiment of this utility model, the BMS support includes:

[0013] BMS support frame, the BMS support frame being fixedly mounted on the BDU bracket; and

[0014] Multiple BMS connection brackets are fixedly connected to the BMS support frame and arranged in layers along its height direction to form multiple mounting parts. The battery management system is located in the mounting part and fixedly installed with the BMS connection brackets.

[0015] In a preferred embodiment of the present invention, the BMS support frame is provided with at least two sets of mounting holes, each set of mounting holes including multiple mounting holes, the multiple mounting holes in each set gradually increasing in height relative to the BDU bracket, and the BMS connecting bracket is fixedly connected to the BMS support frame by fastening bolts passing through the mounting holes.

[0016] In a preferred embodiment of the present invention, the BMS support frame includes at least two sets of sub-supports. Each set of sub-supports includes a base plate and a plurality of protrusions formed on the base plate. The height of the plurality of protrusions increases sequentially. The top of the protrusions and the base plate are respectively provided with mounting holes.

[0017] In a preferred embodiment of this utility model, the mounting hole on the top of the protrusion is a threaded hole, the mounting hole on the base plate is a through hole, and the BDU bracket is provided with a connecting hole corresponding to the through hole. The BMS connecting bracket, the BMS support frame and the BDU bracket are fixedly connected by fastening bolts passing through the BMS connecting bracket, the through hole and the connecting hole.

[0018] In a preferred embodiment of this utility model, the BMS connection bracket is provided with multiple protruding ribs.

[0019] In a preferred embodiment of the present invention, the battery pack further includes a top cover, which is fixedly installed on the top of the housing, and a convex space is formed on one side of the top cover, and the electrical support assembly is located within the convex space.

[0020] This utility model proposes a battery pack in which the BDU bracket adopts a central structure and is fixed to the battery module cover by adhesive. Its two sides are fixed to the side beams of the battery pack by fastening bolts, which significantly improves the strength of the BDU bracket and facilitates its lightweight design, allowing for a thinner design. Simultaneously, the BMS connection bracket adopts a layered arrangement, enabling the battery management system to be stacked and fully utilizing the convex space of the battery pack cover, which is beneficial to improving the battery energy density. Furthermore, the BMS bracket uses a combination of BMS support frame and BMS connection bracket, maximizing the sharing of components, reducing production costs, and also facilitating the lightweight design of the BMS bracket. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the battery pack structure in one embodiment of the present invention.

[0023] Figure 2 This is a cross-sectional schematic diagram of the battery pack in one embodiment of the present invention.

[0024] Figure 3 This is a schematic diagram of the installation of the electrical support assembly in one embodiment of the present invention.

[0025] Figure 4 This is a partial schematic diagram of the installation of the electrical bracket and the enclosure in one embodiment of the present invention.

[0026] Figure 5 This is a schematic diagram of the electrical support assembly in one embodiment of the present invention.

[0027] Figure 6 This is a schematic diagram of the BDU bracket in one embodiment of the present invention.

[0028] Figure 7 This is a schematic diagram of the BMS support frame in one embodiment of the present invention.

[0029] Figure 8This is a schematic diagram of the structure of the BMS connection bracket in one embodiment of the present invention.

[0030] Label Explanation:

[0031] 100. Battery pack; 10. Housing; 11. Side beam; 20. Battery module; 30. Electrical support assembly; 31. BDU bracket; 311. Bracket body; 312. Mounting bracket; 301. First rib; 302. Positioning protrusion; 32. BMS bracket; 321. BMS support frame; 3211. Base plate; 3212. Protrusion; 3201. Threaded hole; 3202. Through hole; 322. BMS connection bracket; 3221. First connection hole; 3222. Second connection hole; 303. Second rib; 40. Top cover; 401. Protrusion space; 50. Battery management system; 60. Battery pack circuit breaker unit. Detailed Implementation

[0032] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0033] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0034] Please see Figures 1 to 8As shown, this utility model proposes a battery pack that solves the problems of low structural strength of existing BDU brackets, which are prone to breakage during vibration and impact, and excessive internal space occupation, leading to a decrease in the performance of soft-pack batteries. Specifically, the battery pack 100 includes a housing 10, battery modules 20, an electrical support assembly 30, and a top cover 40. Multiple battery modules 20 are installed inside the housing 10. The electrical support assembly 30 includes a BDU bracket 31 and a BMS (Battery Management System) bracket 32. The BDU bracket 31 is installed above the battery modules 20 and is fixedly connected to the battery modules 20 and the housing 10. The BMS bracket 32 ​​is fixedly installed on the BDU bracket 31, and the BMS bracket 32 ​​includes multiple mounting parts along the height direction. Each mounting part is equipped with a battery management system 50 to form a stacked structure. A battery pack circuit breaker unit 60 is installed on the BDU bracket. In this embodiment, the top cover 40 is fixedly installed on the top of the housing 10, and a convex space 401 is formed on one side of the top cover 40. The electrical support assembly 30 is located in the convex space 401. The battery management system 50 adopts a stacked design to make full use of the convex space 401 of the battery pack top cover 40, which is beneficial to improving the energy density of the battery pack.

[0035] Please see Figures 2 to 6 As shown, in this embodiment, the BDU bracket 31 is located above the battery module 20 and is glued to the top cover of the battery module 20. Both ends of the BDU bracket 31 are fixedly connected to the side beams 11 inside the housing 10. Specifically, the BDU bracket 31 includes a bracket body 311 and a mounting bracket 312. The mounting bracket 312 is formed at both ends of the bracket body 311. One side of the bracket body 311 is an adhesive surface, on which adhesive is applied to fix it to the top cover of the battery module 20. Through holes are formed in the mounting bracket 312, and fastening bolts pass through these through holes to fix both ends of the BDU bracket 31 to the side beams 11 inside the housing 10. This significantly improves the strength of the BDU bracket 31 and facilitates its lightweight design, allowing for a thinner design. In this embodiment, the mounting bracket 312 has an L-shaped structure, bending towards the internal space of the battery pack relative to the bracket body 311, so that it can better fit the housing 10 and the battery module 20 for fixed installation. In this embodiment, the BDU bracket 31 is provided with multiple first protruding ribs 301 to improve its structural strength; the side edges of the BDU bracket 31 are designed as flanged structures, which can better position and install it inside the battery pack, and the flanged structure helps to ensure safety during installation.

[0036] Please see Figure 5 and Figure 6As shown, in this embodiment, multiple positioning protrusions 302 are distributed along the length of the BDU bracket 31. The BMS bracket 32 ​​is fixedly connected to two positioning protrusions 302 on the side near the BDU bracket 31. The battery pack circuit breaker unit 60 is fixedly installed on the remaining positioning protrusions 302. The positioning protrusions 302 facilitate the positioning and installation of the BMS bracket 32 ​​and the battery pack circuit breaker unit 60 on them, ensuring their positioning accuracy and reliability.

[0037] Please see Figure 5 , Figure 7 and Figure 8 As shown, in this embodiment, the BMS bracket 32 ​​includes a BMS support frame 321 and multiple BMS connection brackets 322. The BMS support frame 321 is fixedly connected to the BDU bracket 31. Specifically, the BMS support frame 321 is fixedly mounted on the positioning protrusion 302 of the BDU bracket 31. The BMS connection brackets 322 are fixedly connected to the BMS support frame 321 and arranged in layers along the height direction of the BMS support frame 321 to form multiple mounting parts. Each mounting part is equipped with a battery management system 50, and the battery management system 50 is fixedly connected to the BMS connection bracket 322. In this embodiment, the BMS support frame 321 is a cast aluminum support frame to ensure its structural strength.

[0038] Please see Figure 5 , Figure 7 and Figure 8As shown, in this embodiment, at least two sets of mounting holes 320 are provided on the BMS support frame 321. Each set of mounting holes 320 includes multiple mounting holes 320, and the height of the multiple mounting holes 320 in each set gradually increases relative to the BDU bracket 31. The BMS connecting bracket is fixedly connected to the BMS support frame by fastening bolts passing through the mounting holes 320. It can be understood that the multiple mounting holes 320 in each set are staggered in the horizontal direction to facilitate the connection of the BMS connecting bracket 322. For example, in this embodiment, the BMS support frame 321 includes at least two sets of sub-brackets. Each sub-bracket includes a base plate 3211 and multiple protrusions 3212 formed on the base plate 3211. The height of the multiple protrusions 3212 increases sequentially, and mounting holes 320 are provided on the protrusions 3212 and the base plate 3211, respectively. The mounting holes 320 on a set of sub-brackets are the set of mounting holes described in the above embodiment. In this embodiment, first connection holes 3221 adapted to the mounting holes 320 are provided at both ends of the BMS connection bracket 322. The mounting hole 320 on the top of the protrusion 3212 is a threaded hole 3201. A fastening bolt passes through the first connection hole 3221 on the BMS connection bracket 322 and is threadedly connected to the threaded hole 3201 to achieve a fixed connection between the BMS connection bracket 322 and the protrusion 3212. The mounting hole 320 on the base plate 3211 is a through hole 3202. A fastening bolt passes through the first connection hole 3221 and the through hole 3202 on the BMS connection bracket 322 to achieve a fixed connection.

[0039] Please see Figure 5 , Figure 7 and Figure 8 As shown, in this embodiment, the BDU bracket 31 is provided with a connection hole corresponding to the through hole 3202. By passing the first connection hole 3221, the through hole 3202 on the BMS connecting bracket 322 and the connection hole on the BDU bracket 31 with fastening bolts, the BMS connecting bracket 322, the BMS support frame 321 and the BDU bracket 31 are fixedly connected. That is, the through hole 3202 on the base plate 3211 is a common hole, realizing the fixed connection of the BMS connecting bracket 322, the BMS support frame 321 and the BDU bracket 31. At the same time, since the two sets of sub-brackets of the BMS support frame 321 are integrally formed structures, the BMS support frame 321 and the BDU bracket 31 can be positioned and fixedly connected through the through hole 3202 on the base plate 3211 of the two sets.

[0040] In some other embodiments, the BMS support frame 321 may also be configured to include a base plate, at least two vertical plates spaced apart on the base plate, and a plurality of mounting plates distributed along the height direction of the vertical plates. The plurality of mounting plates are parallel to the base plate and their length gradually decreases along the height direction. Each mounting plate is provided with mounting holes 320 to fix and install the BMS connection bracket.

[0041] Please see Figure 5 , Figure 7 and Figure 8 As shown, in this embodiment, the two ends of the BMS connection bracket 322 are U-shaped structures. This U-shaped structure can better fit the installation of the BMS support frame 321 and avoid interference. Simultaneously, the two sides of the U-shaped structure are provided with a first connection hole 3221 and a second connection hole 3222. The first connection hole 3221 is used to mate with the mounting hole 320 on the BMS support frame 321 to achieve a fixed connection between the BMS support frame 321 and the BMS connection bracket 322. The second connection hole 3222 is located inside the first connection hole 3221 and is used to mate the installation of the battery management system 50. In this embodiment, the BMS connection bracket 322 is provided with multiple second ribs 303 to improve its structural strength; the side edges of the BMS connection bracket 322 are designed as flanged structures, enabling better positioning and installation within the battery pack. The flanged structure helps ensure safety during installation.

[0042] It is understood that, in this embodiment, after the BMS connection bracket 322 is installed on the BMS support frame 321, it can form a layered structure, which gradually increases in height and is partially staggered in horizontal direction. This is beneficial for the battery management system 50 to achieve a stacked arrangement, while avoiding mutual interference and improving the energy density of the battery pack.

[0043] This utility model proposes a battery pack in which the BDU bracket adopts a central structure and is fixed to the battery module cover by adhesive. Its two sides are fixed to the side beams of the battery pack by fastening bolts, which significantly improves the strength of the BDU bracket and facilitates its lightweight design, allowing for a thinner design. Simultaneously, the BMS connection bracket adopts a layered arrangement, enabling the battery management system to be stacked and fully utilizing the convex space of the battery pack cover, which is beneficial to improving the battery energy density. Furthermore, the BMS bracket uses a combination of BMS support frame and BMS connection bracket, maximizing the sharing of components, reducing production costs, and also facilitating the lightweight design of the BMS bracket.

[0044] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

[0045] Throughout this description, numerous specific details, such as examples of components and / or methods, are provided to provide a complete understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention may be practiced without one or more of these specific details or by other devices, systems, components, methods, parts, materials, components, etc. In other instances, well-known structures, materials, or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

[0046] Throughout this specification, references to "an embodiment," "an embodiment," or "a specific embodiment" mean that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of the present invention, but not necessarily in all embodiments. Therefore, the various representations of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout the specification do not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic of any specific embodiment of the present invention can be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the present invention described and illustrated herein may be based on the teachings herein and will be considered part of the spirit and scope of the present invention.

[0047] It should also be understood that one or more of the elements shown in the figures may be implemented in a more separate or more integrated manner, or may even be removed because they are inoperable in certain circumstances or provided because they may be useful for a particular application.

[0048] Furthermore, unless otherwise expressly stated, any arrows in the accompanying drawings should be considered illustrative only and not limiting. Additionally, unless otherwise stated, the term "or" as used herein is generally intended to mean "and / or". Where a term is anticipated to provide a separation or combination capability that is unclear, a combination of components or steps will also be considered as indicated.

[0049] As used herein and throughout the claims below, unless otherwise specified, “a” and “the” include the plural references. Similarly, as used herein and throughout the claims below, unless otherwise specified, “in” means “in” and “on”.

[0050] The above description of the embodiments shown in this utility model (including the content set forth in the abstract of the specification) is not intended to be an exhaustive enumeration or to limit the utility model to the precise forms disclosed herein. Although specific embodiments and examples of the utility model have been described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the utility model, as will be recognized and understood by those skilled in the art. As indicated, these modifications can be made to the utility model in accordance with the above description of the embodiments described herein, and such modifications will be within the spirit and scope of the utility model.

[0051] This document has generally described the systems and methods in detail to aid in understanding the present invention. Furthermore, various specific details have been set forth to provide a general understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention can be practiced without one or more specific details, or using other devices, systems, accessories, methods, components, materials, parts, etc. In other instances, well-known structures, materials, and / or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

[0052] Therefore, although the present invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the scope of the above disclosure, and it should be understood that in some cases, certain features of the present invention may be adopted without departing from the scope and spirit of the invention and without corresponding use of other features. Thus, many modifications can be made to adapt a particular environment or material to the essential scope and spirit of the present invention. The present invention is not intended to be limited to the specific terms used in the following claims and / or the specific embodiments disclosed as the best mode of carrying out the present invention, but the present invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Therefore, the scope of the present invention will be determined only by the appended claims.

Claims

1. A battery pack, characterized in that, include: The housing contains a battery module. Electrical support assembly, the electrical support assembly comprising: A battery pack circuit breaker (BDU) bracket is mounted on the BDU bracket. The BDU bracket is installed above the battery module and is fixedly connected to the battery module and the housing.

2. The battery pack according to claim 1, characterized in that, The BDU bracket is fixedly connected to the top cover of the battery module by adhesive, and both ends of the BDU bracket are fixedly connected to the side beams of the housing.

3. The battery pack according to claim 1, characterized in that, The BDU support has multiple ribs.

4. The battery pack according to claim 1, characterized in that, The electrical support assembly also includes a BMS bracket, which is fixedly connected to the BDU bracket. The BMS bracket includes multiple mounting parts along the height direction, and a battery management system is installed on each mounting part.

5. The battery pack according to claim 4, characterized in that, The BDU bracket has multiple positioning protrusions distributed along its length. The BMS bracket is fixedly connected to two of the positioning protrusions on one side, and the battery pack circuit breaker unit is fixedly installed on the remaining positioning protrusions.

6. The battery pack according to claim 4, characterized in that, The BMS support includes: BMS support frame, the BMS support frame being fixedly mounted on the BDU bracket; and Multiple BMS connection brackets are fixedly connected to the BMS support frame and arranged in layers along its height direction to form multiple mounting parts. The battery management system is located in the mounting part and fixedly installed with the BMS connection brackets.

7. The battery pack according to claim 6, characterized in that, The BMS support frame is provided with at least two sets of mounting holes, each set of mounting holes including multiple mounting holes, and the multiple mounting holes in each set gradually increase in height relative to the BDU bracket. The BMS connecting bracket is fixedly connected to the BMS support frame by fastening bolts that pass through the mounting holes.

8. The battery pack according to claim 7, characterized in that, The BMS support frame includes at least two sets of sub-supports. Each set of sub-supports includes a base plate and a plurality of protrusions formed on the base plate. The height of the plurality of protrusions increases sequentially. The top of the protrusions and the base plate are respectively provided with mounting holes.

9. The battery pack according to claim 8, characterized in that, The mounting hole on the top of the protrusion is a threaded hole, the mounting hole on the base plate is a through hole, and the BDU bracket is provided with a connecting hole corresponding to the through hole. The BMS connecting bracket, the BMS support frame and the BDU bracket are fixedly connected by fastening bolts passing through the BMS connecting bracket, the through hole and the connecting hole.

10. The battery pack according to claim 6, characterized in that, The BMS connection bracket is provided with multiple protruding ribs.

11. The battery pack according to claim 1, characterized in that, The battery pack also includes a top cover, which is fixedly installed on the top of the housing, and a convex space is formed on one side of the top cover, and the electrical support assembly is located within the convex space.

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