Bottom guard plate, battery pack and electric equipment

Abstract

This application provides a bottom protection plate, a battery pack, and electrical equipment. Relating to the field of power battery technology, the bottom protection plate provided in this application includes a main body, multiple cell support sections, a crossbeam support section, and a device support section. The multiple cell support sections are arranged sequentially at intervals along a first direction, and are used to support cell modules. In the first direction, a crossbeam support section is located between two adjacent cell support sections, and is used to support a crossbeam between cell modules. A device support section is disposed on one side of the multiple cell support sections along the first direction, and is used to support electrical components. By providing cell support sections, crossbeam support sections, and device support sections, the structural strength of the bottom protection plate is improved, and corresponding support points can be provided for the cell modules, crossbeams, and electrical components within the battery pack, achieving multi-level zoned support, improving the structural stability of the bottom protection plate, and thus improving the safety of the battery pack.

Description

Technical Field

[0001] This application relates to power battery technology, and more particularly to a bottom protection plate, a battery pack, and an electrical device. Background Technology

[0002] In recent years, the electric vehicle industry has developed rapidly. As an important component of electric vehicles, the battery pack not only affects the performance and safety of electric vehicles, but also directly impacts their market competitiveness and sustainable development.

[0003] In related technologies, a battery pack includes a frame, and battery cell modules and electrical components placed inside the frame. To improve the safety of the battery pack, the battery pack also includes a bottom protective plate, which together with the frame encloses a space for encapsulating and protecting the battery cell modules and electrical components.

[0004] However, the existing bottom protection plate structure has low strength. If the electric vehicle is hit by stones or branches during driving, the bottom protection plate is easily damaged, which will affect the safety of the battery pack's internal cell modules and electrical components, and pose a safety hazard. Utility Model Content

[0005] In view of this, this application provides a bottom protection plate, a battery pack, and an electrical device, aiming to improve the structural strength of the bottom protection plate and thus improve the safety of the battery pack.

[0006] To achieve the above objectives, this application provides a bottom protection plate, a battery pack, and an electrical device, which adopt the following technical solution:

[0007] In a first aspect, this application provides a bottom guard plate for mounting on the bottom of a tray; the bottom guard plate is capable of supporting electrical components and battery modules located inside the tray frame; the bottom guard plate includes:

[0008] The main body, at least for connection with the tray;

[0009] Multiple cell carriers are arranged at intervals along a first direction, and the cell carriers are used to carry the cell module.

[0010] In the first direction, the crossbeam support portion is located between two adjacent cell support portions, and the crossbeam support portion is used to support the crossbeam between the cell modules;

[0011] A device carrier is disposed on one side of the plurality of cell carriers along the first direction, and the device carrier is used to carry the electrical components.

[0012] In one possible implementation, the bottom protective plate provided in this application includes a first support portion and a second support portion for the plurality of battery cell support portions;

[0013] In the first direction, the first support portion is located on the side of the second support portion away from the device support portion;

[0014] The first support portion extends along the second direction, and the second support portion extends along the second direction, which is perpendicular to the first direction.

[0015] In the plane of the main body, at least a portion of the first support portion extends toward the second support portion, and at least a portion of the second support portion extends toward the first support portion.

[0016] In one possible implementation, the bottom protective plate provided in this application has a concave structure in its main body, and the plurality of battery cell support portions are located inside the concave structure; the top of the battery cell support portion is flush with the main body.

[0017] In one possible implementation, the bottom protective plate provided in this application has a concave structure comprising a first part and a second part connected to each other;

[0018] The first part and the second part are arranged along the first direction, and the width of the first part is greater than the width of the second part;

[0019] The main body is also provided with a recessed portion, which is provided in the second direction in a manner corresponding to at least a portion of the second part; the portion of the main body in which the recessed portion is not formed is used together with the cell-bearing portion to support the cell module.

[0020] In one possible implementation, the bottom protective plate provided in this application has a plurality of sunken portions, and the plurality of sunken portions include a first sunken portion and a second sunken portion arranged at intervals.

[0021] In the second part, at least a portion of the first support portion extends away from the second support portion; in the second direction, the portion of the first support portion protruding away from the second support portion is located between the first sinking portion and the second sinking portion.

[0022] In one possible implementation, the bottom protective plate provided in this application has a plurality of crossbeam bearing portions, and the plurality of crossbeam bearing portions are arranged sequentially at intervals along the second direction;

[0023] At least a portion of the multiple beam support portions are provided with connecting protrusions, and the beam support portions can be connected to the beams via the connecting protrusions.

[0024] In one possible implementation, the bottom protective plate provided in this application has the device support portion extending along a second direction;

[0025] The device carrier is provided with at least one connecting protrusion, and the device carrier can be connected to the electrical component through at least one of the connecting protrusions.

[0026] Secondly, this application provides a battery pack, including a tray, a cell module, electrical components, and the aforementioned bottom protection plate.

[0027] In one possible implementation, the battery pack provided in this application further includes a top cover, which is disposed on top of the tray;

[0028] The top cover is provided with an abutting part that extends toward the battery cell module. The abutting part is provided with a buffer layer, and the abutting part contacts the battery cell module through the buffer layer.

[0029] Thirdly, this application provides an electrical device, including the aforementioned bottom protective plate or the aforementioned battery pack.

[0030] The bottom cover plate provided in this application is used for installation on the bottom of a tray. The bottom cover plate can support electrical components and battery cell modules located inside the tray frame. The bottom cover plate includes a main body, multiple battery cell support sections, a crossbeam support section, and a device support section. The main body is at least used for connection to the tray. The multiple battery cell support sections are arranged sequentially at intervals along a first direction, and each battery cell support section supports a battery cell module. In the first direction, a crossbeam support section is located between two adjacent battery cell support sections, and each crossbeam support section supports a crossbeam between battery cell modules. A device support section is disposed on one side of the multiple battery cell support sections along the first direction, and each device support section supports electrical components. By providing battery cell support sections, crossbeam support sections, and device support sections, the structural strength of the bottom cover plate is improved, and corresponding support points can be provided for the battery cell modules, crossbeams, and electrical components within the battery pack, achieving multi-level zoned support, improving the structural stability of the bottom cover plate, and thus improving the safety of the battery pack.

[0031] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the technical solutions provided by this application, other technical features contained in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific embodiments. Attached Figure Description

[0032] The specific embodiments of this application are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for illustration and explanation of this application, and this application is not limited to the specific embodiments described below.

[0033] Figure 1A structural schematic diagram of the bottom protective plate provided in this application;

[0034] Figure 2 This application provides a partial exploded structural diagram of the battery pack. Figure 1 ;

[0035] Figure 3 This application provides a partial exploded structural diagram of the battery pack. Figure 2 .

[0036] Explanation of reference numerals in the attached figures:

[0037] 10. Bottom guard plate; 20. Tray; 30. Electrical components; 40. Battery cell module; 100. Main body; 110. Recessed structure; 111. First part; 112. Second part; 120. Sunken part; 121. First sinking part; 122. Second sinking part; 200. Battery cell support part; 210. First support part; 220. Second support part; 300. Crossbeam support part; 400. Device support part; 500. Connecting protrusion; 600. Top cover; 700. Buffer layer.

[0038] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0040] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] In the description of the embodiments of this application, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing 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 this application.

[0042] In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise specified precisely.

[0043] The terms "first," "second," "third," "fourth," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0044] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0045] In recent years, the electric vehicle industry has shown rapid development. The battery pack plays a crucial role in the composition of an electric vehicle; it is not only a key factor influencing the performance and safety of the vehicle, but also directly related to its market competitiveness and the sustainable development of the industry.

[0046] At the technical level, a battery pack mainly consists of a frame, battery cell modules housed within the frame, and electrical components. To effectively improve the safety performance of the battery pack, a bottom protective plate is also included. The bottom protective plate works in conjunction with the frame to create a space for encapsulating and protecting the battery cell modules and electrical components.

[0047] However, currently, existing underbody protection plates suffer from low structural strength. During normal driving of an electric vehicle, the underbody protection plate is highly susceptible to damage when encountering impacts from external forces such as stones or branches. Once the underbody protection plate is damaged, it will directly affect the safety of the battery pack's internal cell modules and electrical components, thus creating a potential safety hazard. Of course, damage to the underbody protection plate can also occur in other possible scenarios, and this application does not limit the actual scenarios.

[0048] Based on the aforementioned technical problems, this application provides a bottom protective plate, a battery pack, and electrical equipment. In this technical solution, the bottom protective plate is installed at the bottom of a tray. The bottom protective plate can support electrical components and battery cell modules located inside the tray frame. The bottom protective plate includes a main body, multiple battery cell support sections, a crossbeam support section, and a device support section. The main body is at least used for connection to the tray. The multiple battery cell support sections are arranged sequentially at intervals along a first direction, and each battery cell support section supports a battery cell module. In the first direction, a crossbeam support section is located between two adjacent battery cell support sections, and each crossbeam support section supports a crossbeam between battery cell modules. A device support section is disposed on one side of the multiple battery cell support sections along the first direction, and each device support section supports electrical components. By providing battery cell support sections, crossbeam support sections, and device support sections, the structural strength of the bottom protective plate is improved, and corresponding support points can be provided for the battery cell modules, crossbeams, and electrical components within the battery pack, achieving multi-level zoned support, improving the structural stability of the bottom protective plate, and thus improving the safety of the battery pack.

[0049] It should be noted that, Figures 1 to 3 The diagram shows a simplified representation of the bottom cover, battery pack, and components of the electrical equipment. The specific structures of the bottom cover, battery pack, and other components of the electrical equipment are not limited to these. Figures 1 to 3 of examples.

[0050] in addition, Figures 1 to 3 The X, Y, and Z arrows shown (if they exist) are perpendicular to each other in three-dimensional space.

[0051] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments:

[0052] Reference Figure 1 , Figure 2 and Figure 3 As shown, this application embodiment provides a bottom guard plate 10 for installation on the bottom of a tray 20. The bottom guard plate 10 can support electrical components 30 and battery modules 40 located inside the frame of the tray 20.

[0053] In the relevant technical field, the battery pack has a tray 20, and the specific structure of the tray 20 is not limited in the embodiments of this application.

[0054] The bottom protective plate 10 provided in this embodiment includes:

[0055] The main body 100 is used at least for connection with the pallet 20. The bottom guard plate 10 and the pallet 20 can be welded or bolted together, without specific restrictions.

[0056] Multiple cell carriers 200 are arranged sequentially at intervals along a first direction, and the cell carriers 200 are used to carry the cell module 40.

[0057] In the first direction, the crossbeam support portion 300 is located between two adjacent cell support portions 200, and the crossbeam support portion 300 is used to support the crossbeam between the cell modules 40.

[0058] The device carrier 400 is disposed on one side of the plurality of cell carriers 200 along the first direction, and the device carrier 400 is used to carry electrical components 30.

[0059] In the above embodiments, refer to Figure 1 As shown, multiple cell carrier portions 200 are arranged sequentially at intervals along a first direction, that is, multiple cell carrier portions 200 are arranged along... Figure 1 The cells are arranged at intervals in the direction of the Y-arrow. Cell modules 40 represent relevant technology in this field, and this application does not limit the specific structure of the cell module 40. Similarly, to improve the overall support strength within the battery pack, a crossbeam is provided between two adjacent cell modules 40, and the crossbeam support portion 300 can support the crossbeam. Electrical components 30 in the battery pack include, but are not limited to, battery disconnection units (BDUs), a key component specifically designed for the inside of the battery pack and belonging to a type of high-voltage distribution box. The main function of the BDU is to provide power management and protection functions for the high-voltage system. This application does not limit the specific structure of the electrical components 30, and the device support portion 400 in this application can support the electrical components 30.

[0060] By setting up the cell support section 200, the crossbeam support section 300, and the device support section 400, the structural strength of the bottom protection plate 10 is improved by setting up reinforcing ribs. It can also provide corresponding support points for the cell module 40, the crossbeam, and the electrical components 30 in the battery pack, respectively, to achieve multi-level zoned load bearing, improve the structural stability of the bottom protection plate 10, and thus improve the safety of the battery pack.

[0061] In one possible implementation, the plurality of cell carrier portions 200 include a first carrier portion 210 and a second carrier portion 220.

[0062] In the first direction, the first support portion 210 is located on the side of the second support portion 220 away from the device support portion 400.

[0063] The first support portion 210 extends along the second direction, and the second support portion 220 extends along the second direction, which is perpendicular to the first direction.

[0064] In the plane containing the main body 100, at least a portion of the first support portion 210 extends toward the second support portion 220, and at least a portion of the second support portion 220 extends toward the first support portion 210.

[0065] In the above embodiment, by setting the first support portion 210 and the second support portion 220 spaced apart in the first direction, the space of the main body 100 in the first direction can be fully utilized, the reinforcing area can be reasonably set, and the number of reinforcing parts can be increased, thereby further improving the structural strength of the bottom protective plate 10. Furthermore, the protruding portions of the first support portion 210 and the second support portion 220 correspond to each other in the second direction perpendicular to the first direction. When subjected to external force, the force can be more evenly distributed on the first support portion 210 and the second support portion 220. This distributed force design can reduce the burden on individual support portions. The protruding portions of the first support portion 210 and the second support portion 220 can provide additional support points for the cell module 40, increasing the contact area between the cell and the support portion. This can enhance the connection strength between the cell module 40 and the cell support portion 200, making the cell module 40 more stable and less prone to displacement or shaking.

[0066] like Figure 1 As shown, the second direction is Figure 1 In the direction indicated by the X-arrow, the first support portion 210 extends along the second direction, and the second support portion 220 extends along the second direction, further increasing the reinforcing area and improving structural strength. In the plane containing the main body 100, at least a portion of the first support portion 210 extends toward the second support portion 220, and at least a portion of the second support portion 220 extends toward the first support portion 210. This further increases the reinforcing area, thereby further improving structural strength.

[0067] In one possible implementation, the main body 100 is provided with a concave structure 110, and a plurality of battery cell carriers 200 are located inside the concave structure 110; the top of the battery cell carrier 200 is flush with the main body 100.

[0068] Concave structure 110 orientation Figure 1 The protrusion is in the opposite direction of the Z-arrow. By setting the concave structure 110, multiple cell support portions 200 are located inside the concave structure 110. Here, the concave structure 110 is recessed relative to the main body 100, or it can be understood that the concave structure 110 is set to protrude towards the side away from the tray 20. This allows the cell support portion 200 to have a larger space for ribs, improving the rigidity and hardness of the cell support portion 200 itself, which is beneficial to improving the structural strength of the main body 100. Furthermore, by setting the concave structure 110, the gravity of the cell module 40 acts on the cell support portion 200, and the pressure of the cell support portion 200 is evenly distributed to the main body 100 through the concave structure 110, avoiding local stress concentration and improving the safety of the main body 100.

[0069] In one possible implementation, the concave structure 110 includes a first portion 111 and a second portion 112 connected together.

[0070] The first part 111 and the second part 112 are arranged along the first direction, and the width of the first part 111 is greater than the width of the second part 112.

[0071] The main body 100 is also provided with a recessed portion 120, which is provided in the second direction in a corresponding manner to at least a portion of the second portion 112.

[0072] The portion of the main body 100 that does not form the recessed portion 120 is used together with the cell support portion 200 to support the cell module 40.

[0073] In the above embodiment, by setting the sunken portion 120, on the one hand, the bottom protective plate 10 has more reinforcing area, which further improves the rigidity of the structure. On the other hand, the part of the main body 100 that does not form the sunken portion 120 together with the cell support portion 200 supports the cell module 40, so that the main body 100 has a more suitable position to support the cell module 40, thereby providing more support points for the cell module 40 and improving the stability of the cell module 40.

[0074] In one possible implementation, continue to refer to Figure 1 As shown, there are multiple sunken sections 120, including a first sunken section 121 and a second sunken section 122 that are spaced apart.

[0075] In the second part 112, at least a portion of the first support portion 210 extends away from the second support portion 220.

[0076] In the second direction, such as Figure 1 In the direction of the X-shaped arrow, the first support portion 210 is located between the first recessed portion 121 and the second recessed portion 122, opposite to the protruding part of the second support portion 220. The positions of the first recessed portion 121 and the second recessed portion 122 can be interchanged, and are not restricted here.

[0077] In the above embodiment, at least a portion of the first bearing portion 210 extends away from the second bearing portion 220 and protrudes into the second portion 112, which can further increase the reinforcing area of ​​the bottom guard plate 10 and improve the structural strength.

[0078] The arrangement of the first recessed portion 121 and the second recessed portion 122 can create multiple stress dispersion points on the structure. When subjected to external forces, the stress can be more evenly distributed through these recessed portions 120, avoiding excessive stress concentration in local areas, thereby reducing the risk of structural damage or deformation caused by stress concentration.

[0079] The first support portion 210 extends away from the second support portion 220 and is located in the second direction between the first recessed portion 121 and the second recessed portion 122. This structure can increase the support area of ​​the bottom protective plate 10. The larger support area can better withstand the gravity and other loads of the upper structure, making the entire structure more stable.

[0080] By setting multiple recessed sections 120 and making the first supporting section 210 protrude at specific positions, a more rational layout can be achieved within a limited space. This design can divide and utilize the internal space according to the functional and dimensional requirements of different components, improving space utilization. Furthermore, the presence of multiple recessed sections 120 facilitates wiring. Various wires of the battery module 40 can be hidden within these recessed sections 120, preventing them from being exposed, which is not only aesthetically pleasing but also avoids damage to the wiring caused by external factors.

[0081] In one possible implementation, there are multiple beam support portions 300, which are arranged sequentially at intervals along the second direction.

[0082] At least a portion of the multiple beam support portions 300 are provided with connecting protrusions 500, and the beam support portions 300 can be connected to the beams via the connecting protrusions 500.

[0083] In the above embodiments, reference is made to Figure 1 As shown, multiple beam-bearing portions 300 are arranged at intervals along the second direction, making the connection points between the beam-bearing portions 300 and the beam more evenly distributed on the beam. This allows the force on the beam-bearing portions 300 to be more evenly distributed across the connection points, preventing loosening or damage due to excessive local stress. At least some of the beam-bearing portions 300 are provided with connecting protrusions 500, which connect to the beam, increasing the contact area and friction at the connection point. Compared to traditional planar connection methods, the connecting protrusions 500 can better resist the tensile and shearing forces exerted on the connection points, thereby improving the strength and reliability of the connection.

[0084] In one possible implementation, the device carrier portion 400 extends along a second direction.

[0085] The device carrier 400 is provided with at least one connecting protrusion 500, and the device carrier 400 can be connected to the electrical component 30 through at least one connecting protrusion 500.

[0086] This design, with at least one connecting protrusion 500, provides multiple connection points, making the connection between the device carrier 400 and the electrical component 30 more secure. Compared to a single-point connection, multi-point fixation can better resist external forces such as vibration and tension, effectively reducing the risk of loosening. The connecting protrusion 500 allows for a more even distribution of pressure between the device carrier 400 and the electrical component 30. This avoids damage to the electrical component 30 or the connection points due to excessive localized stress, extending the service life of the electrical component 30.

[0087] Furthermore, the connecting protrusion 500 provides an accurate positioning reference for the assembly of the device carrier 400 and the electrical component 30. During installation, operators can quickly and accurately place the electrical component 30 in the designated position using the connecting protrusion 500, improving assembly efficiency and quality.

[0088] In other possible implementations, the bottom cover plate 10 is integrally formed, meaning the main body 100, the cell support portion 200, the crossbeam support portion 300, and the device support portion 400 are all integrally formed, possibly by stamping. The integrally formed bottom cover plate 10 has no seams or weak points, making the overall structure of the bottom cover plate 10 more complete. When subjected to external forces, the force can be evenly distributed across the entire bottom cover plate 10, contributing to improved structural stability.

[0089] This application embodiment also provides a battery pack, including a tray 20, a cell module 40, electrical components 30, and the aforementioned bottom protective plate 10. The bottom protective plate 10 is connected to the tray 20. Specifically, the tray 20 has a crossbeam, and the cell module 40 and electrical components 30 are disposed within a receiving cavity formed by the tray 20, the crossbeam, and the bottom protective plate 10. The specific structure of the bottom protective plate 10 has been described above and will not be repeated here. The battery pack provided in this application embodiment has all the beneficial technical effects of the aforementioned bottom protective plate 10.

[0090] In one possible implementation, refer to Figure 2 As shown, the battery pack also includes a top cover 600, which is disposed on top of the tray 20.

[0091] The top cover 600 is provided with an abutment portion that extends toward the cell module 40. The abutment portion is provided with a buffer layer 700, and the abutment portion contacts the cell module 40 through the buffer layer 700.

[0092] Here, when the battery pack is subjected to external impact, the abutment portion of the top cover 600 contacts the cell module 40 through the buffer layer 700. The buffer layer 700 can be made of a soft and elastic material, such as rubber, sponge, or special polymer materials. These materials can effectively absorb and disperse the impact force, reducing the force transmitted to the cell module 40, thereby reducing the risk of damage to the cell module 40 due to impact. The top cover 600 and the tray 20 form a more stable overall structure through the cooperation of the abutment portion and the buffer layer 700. The abutment portion acts as an internal support structure, strengthening the overall strength of the battery pack when subjected to external forces.

[0093] In one possible implementation, this application also provides an electrical device, including the aforementioned underbody protection plate 10 or the aforementioned battery pack. The electrical device can be a vehicle; in this application, a vehicle can refer to a large vehicle, a small vehicle, a special-purpose vehicle, etc. For example, according to vehicle type, the vehicle in this application can be a sedan, an off-road vehicle, a multi-purpose vehicle (MPV), or other types of vehicles. Of course, other electrical devices can also be used, and this application does not limit this.

[0094] The implementation principle of the bottom protective plate 10, battery pack, and electrical equipment in this application embodiment is as follows: The bottom protective plate 10 provided in this application is used to be installed at the bottom of the tray 20; the bottom protective plate 10 can support the electrical components 30 and the cell modules 40 located inside the frame of the tray 20. The bottom protective plate 10 includes a main body 100, multiple cell support parts 200, a crossbeam support part 300, and a device support part 400, wherein the main body 100 is at least used to connect with the tray 20, the multiple cell support parts 200 are arranged sequentially at intervals along a first direction, and the cell support parts 200 are used to support the cell modules 40; in the first direction, the crossbeam support part 300 is located between two adjacent cell support parts 200, and the crossbeam support part 300 is used to support the crossbeam between the cell modules 40; the device support part 400 is disposed on one side of the multiple cell support parts 200 along the first direction, and the device support part 400 is used to support the electrical components 30. By setting up the cell support section 200, the crossbeam support section 300 and the device support section 400, the structural strength of the bottom protection plate 10 is improved, and corresponding support points can be provided for the cell module 40, the crossbeam and the electrical components 30 in the battery pack respectively, so as to realize multi-level zoned support, improve the structural stability of the bottom protection plate 10, and thus improve the safety of the battery pack.

[0095] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein.

[0096] The embodiments in this application are intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed in this application. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this application are indicated by the claims.

[0097] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A kick plate characterized in that, For mounting on the bottom of a tray (20); the bottom guard plate (10) is capable of supporting electrical components (30) and battery cell modules (40) located inside the frame of the tray (20); the bottom guard plate (10) includes: The main body (100) is at least used for connection with the tray (20); Multiple cell carriers (200) are arranged sequentially at intervals along a first direction, and the cell carriers (200) are used to carry the cell module (40). A crossbeam support portion (300) is located between two adjacent battery cell support portions (200) in the first direction. The crossbeam support portion (300) is used to support the crossbeam between the battery cell modules (40). A device carrier (400) is disposed on one side of the plurality of cell carriers (200) along the first direction, and the device carrier (400) is used to carry the electrical component (30).

2. The underguard of claim 1, wherein, The plurality of said cell carrier portions (200) include a first carrier portion (210) and a second carrier portion (220); In the first direction, the first support portion (210) is located on the side of the second support portion (220) away from the device support portion (400); The first support portion (210) extends along the second direction, and the second support portion (220) extends along the second direction, which is perpendicular to the first direction; In the plane of the main body (100), at least a portion of the first support portion (210) extends toward the second support portion (220), and at least a portion of the second support portion (220) extends toward the first support portion (210).

3. The underpan according to claim 2, characterized in that The main body (100) is provided with a concave structure (110), and the plurality of battery cell support parts (200) are located inside the concave structure (110); the top of the battery cell support part (200) is flush with the main body (100).

4. The underpan according to claim 3, characterized in that The concave structure (110) includes a first part (111) and a second part (112) connected together. The first part (111) and the second part (112) are arranged along the first direction, and the width of the first part (111) is greater than the width of the second part (112); The main body (100) is also provided with a recessed portion (120), which is provided in the second direction in a manner corresponding to at least a portion of the second part (112); the portion of the main body (100) in which the recessed portion (120) is not formed is used together with the cell support portion (200) to support the cell module (40).

5. The underpan according to claim 4, characterized in that The number of the sunken portions (120) is multiple, and the multiple sunken portions (120) include a first sunken portion (121) and a second sunken portion (122) arranged at intervals. In the second part (112), at least a portion of the first support portion (210) extends away from the second support portion (220); in the second direction, the first support portion (210) protrudes away from the second support portion (220) and is located between the first sinking portion (121) and the second sinking portion (122).

6. The underpan according to any one of claims 1-5, characterized in that The number of the crossbeam support parts (300) is multiple, and the multiple crossbeam support parts (300) are arranged at intervals along the second direction; At least a portion of the multiple beam support portions (300) are provided with connecting protrusions (500), and the beam support portions (300) can be connected to the beams via the connecting protrusions (500).

7. The underpan according to any one of claims 1-5, characterized in that The device carrier (400) extends along the second direction; The device carrier (400) is provided with at least one connecting protrusion (500), and the device carrier (400) can be connected to the electrical component (30) through at least one of the connecting protrusions (500).

8. A battery pack, characterized by, It includes a tray (20), a cell module (40), electrical components (30), and a bottom cover as described in any one of claims 1-7.

9. The battery pack of claim 8, wherein, It also includes a top cover (600) disposed on top of the tray (20); The top cover (600) is provided with an abutment portion that extends toward the battery cell module (40). The abutment portion is provided with a buffer layer (700) and the abutment portion contacts the battery cell module (40) through the buffer layer (700).

10. An electric device, characterized by Includes the bottom protection plate as described in any one of claims 1-7, or the battery pack as described in claim 8 or 9.

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