A bottom-protected battery box

Abstract

The utility model relates to battery technology field discloses a kind of bottom-supporting battery box, comprising: connecting post including cylinder and vehicle connecting end, vehicle bottom is connected by vehicle connecting end and cylinder lower end is fixedly connected with protection component, battery box is fixed in vehicle bottom, protection component includes bottom protection plate and reinforcing rib, reinforcing rib is set above bottom protection plate, mounting part includes water cooling mounting plate, top plate and elastic element, electric core assembly includes electric core and insulating box, electric core is placed in insulating box upside down, the installation space of electric core assembly is formed between protection component and water cooling mounting plate, bolt passes through top plate, water cooling mounting plate and the screw hole of insulating box in turn, electric core assembly is installed in mounting part downside. The electric core assembly of the application is effectively protected from damage, the safety reliability is improved, the possibility of impact force transmission to electric core is reduced, and the maintenance convenience is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a battery box that prevents bottoming out. Background Technology

[0002] With the rapid development of the new energy vehicle industry, the layout and structural safety of the power battery, as one of the core components of electric vehicles, directly affect the performance and safety level of the entire vehicle. Currently, most mainstream new energy vehicles integrate the battery pack under the vehicle to lower the center of gravity, improve handling, and optimize space utilization. However, this arrangement of the battery system under the chassis also brings new safety challenges, especially the increasing risk of bottoming out during vehicle operation. Bottoming out can directly impact the lower casing of the battery pack, causing deformation, cracks, or even seal failure, leading to water ingress or short circuits. Severe bottoming out can cause short circuits, thermal runaway, or even fire and explosion of the battery pack, threatening the safety of the entire vehicle and its occupants. Utility Model Content

[0003] In view of this, this utility model proposes an anti-bottom-support battery box, which aims to solve the current problems of battery box deformation, cracks, and sealing failure caused by bottom support, and even short circuits, thermal runaway, and fire and explosion caused by severe bottom support.

[0004] To achieve the above objectives, this utility model proposes an anti-bottom-drop battery box, comprising:

[0005] The connecting column includes a vehicle connecting end and a column body. The vehicle connecting end is connected to the bottom of the vehicle, and the lower end of the column body is fixedly connected to the protective component to fix the battery box to the bottom of the vehicle.

[0006] The protective component includes a bottom protective plate and reinforcing ribs, the reinforcing ribs being disposed above the bottom protective plate and fixedly connected to the bottom protective plate;

[0007] The mounting components include a water-cooled mounting plate, a top plate, and elastic elements;

[0008] The battery cell assembly includes a battery cell and an insulating box; the battery cell is placed upside down inside the insulating box;

[0009] The protective component and the water-cooled mounting plate form an installation space for the battery cell assembly. The battery cell assembly is installed in the installation space. The top plate, the water-cooled mounting plate, and the insulation box are all provided with screw holes that mate with bolts. The bolts pass through the screw holes of the top plate, the water-cooled mounting plate, and the insulation box in sequence to fix the battery cell assembly to the underside of the mounting component.

[0010] Furthermore, the reinforcing ribs are hollow structures; multiple reinforcing ribs are arranged in a triangular pattern on the upper side of the bottom protective plate.

[0011] Furthermore, the thickness of the reinforcing rib is 3-5mm; the thickness of the bottom protective plate is 3-20mm.

[0012] Furthermore, the protective component has a connection hole that mates with the connecting post, the lower end of the connecting post is placed in the connection hole and fixedly connected to the protective component.

[0013] Furthermore, the water-cooled mounting plate is provided with a fixed position, which is connected to the bottom protective plate by bolts, so that the water-cooled mounting plate is installed above the bottom protective plate.

[0014] Furthermore, the upper end of the elastic element is connected to the bottom of the vehicle, and the lower end is connected to the water-cooled mounting plate. Furthermore, the elastic element is in a compressed state.

[0015] Furthermore, the battery cell is provided with battery cell contacts, and the bottom of the insulating box is provided with an elliptical placement hole that mates with the battery cell contacts.

[0016] Furthermore, the distance between the bottom end of the battery cell assembly and the top end of the protective component is 50-200mm.

[0017] Furthermore, bottom-support battery boxes are used in vehicles.

[0018] This invention offers the following technical advantages: The connection holes between the connecting column and the protective component allow the battery box to be reliably fixed to the bottom of the vehicle, improving installation stability. The protective component consists of a bottom protective plate and multiple hollow reinforcing ribs arranged in a triangular pattern, resulting in high overall structural strength, excellent bending and impact resistance, and preventing damage to the battery cells from external impacts. The water-cooled mounting plate is positioned above the protective component and connected to the bottom protective plate by bolts, creating a compact structure with good heat dissipation, providing an efficient cooling channel for the battery cell assembly. The battery cells are installed upside down in the insulating box and sequentially bolted together through the screw holes of the top plate, water-cooled mounting plate, and insulating box, forming a multi-layered fixing method that effectively prevents the battery cells from loosening or falling off under vibration conditions. An elastic element is positioned between the water-cooled mounting plate and the bottom of the vehicle and is always in a compressed state. In the event of bottoming out or deformation of the battery box, the elastic element prevents the battery cell assembly from impacting the bottom of the vehicle, avoiding battery cell impact and fire, and improving the safety performance of the battery box. A gap of 50-200mm is provided between the bottom of the battery cell assembly and the top of the protective component, forming an effective heat dissipation and buffer space. The components are mainly connected by bolts, which makes disassembly and assembly convenient and facilitates quick replacement, inspection or maintenance of the battery cell assembly. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in 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.

[0020] Figure 1 A schematic diagram of the anti-bottom-slip battery box provided for an embodiment of this utility model;

[0021] Figure 2 This is a front view of the anti-bottom-slip battery box structure provided in an embodiment of the present utility model;

[0022] Figure 3 A schematic diagram of the protective components of the anti-bottom-slip battery box provided in an embodiment of this utility model;

[0023] Figure 4 A schematic diagram of the battery cell assembly of the anti-bottom-feed battery box provided in this embodiment of the utility model;

[0024] Figure 5 A schematic diagram of the cell assembly structure of the anti-bottoming battery box provided in this embodiment of the utility model.

[0025] The components include: 1. Connecting column; 11. Column body; 12. Vehicle connection end; 2. Mounting components; 21. Water-cooled mounting plate; 211. Fixing position; 22. Top plate; 23. Elastic element; 3. Battery cell assembly; 31. Battery cell; 311. Battery cell contact; 32. Insulation box; 321. Placement hole; 4. Protective components; 41. Bottom protective plate; 42. Reinforcing rib; 43. Connecting hole. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] In some embodiments of this application, see Figure 1-5As shown, a bottom-support battery box includes: a connecting column 1 including a vehicle connecting end 11 and a column body 12, which is connected to the bottom of the vehicle through the vehicle connecting end 11 and the lower end of the column body 12 is fixedly connected to the protective component 4 to fix the battery box to the bottom of the vehicle.

[0029] The protective component 4 includes a bottom protective plate 41 and a reinforcing rib 42. The reinforcing rib 42 is disposed above the bottom protective plate 41 and is fixedly connected to the bottom protective plate 41.

[0030] Mounting component 2 includes a water-cooled mounting plate 21, a top plate 22, and an elastic element 23;

[0031] Battery cell assembly 3 includes battery cell 31 and insulation box 32; battery cell 31 is placed upside down inside insulation box 32;

[0032] The protective component 4 and the water-cooled mounting plate 21 form an installation space for the battery cell assembly 3. The battery cell assembly 3 is installed in the installation space. The top plate 22, the water-cooled mounting plate 21 and the insulation box 32 are all provided with screw holes that cooperate with bolts. The bolts pass through the screw holes of the top plate 22, the water-cooled mounting plate 21 and the insulation box 32 in sequence to fix the battery cell assembly 3 on the lower side of the mounting component 2.

[0033] Specifically, the vehicle connection end 11 is used to securely fix the connecting post 1 to the vehicle's bottom structure, and the lower end of the post 12 is connected to the protective component 4, allowing the entire battery box to be reliably suspended from the vehicle's bottom via the connecting post 1. The protective component 4 includes a bottom protective plate 41 and reinforcing ribs 42 fixedly connected thereon. The reinforcing ribs 42 enhance the overall strength and impact resistance of the bottom protective plate 41. A water-cooled mounting plate 21 is positioned above the protective component 4 and has good thermal conductivity, used to fix and cool the battery cell assembly 3. A top plate 22 is located above the battery cell assembly 3, and an elastic element 23 is positioned between the water-cooled mounting plate 21 and the vehicle's bottom, providing downward preload to the battery cell assembly 3. The battery cell assembly 3 includes the battery cell 31 body and an insulating box 32 for insulation and protection. The battery cell 31 is placed in the insulating box 32 in an inverted arrangement. A dedicated installation space for accommodating the battery cell assembly 3 is formed between the protective component 4 and the water-cooled mounting plate 21, within which the battery cell assembly 3 is installed. During installation, bolts are passed sequentially through the screw holes on the top plate 22, the water-cooled mounting plate 21, and the insulation box 32 to fix the battery cell assembly to the lower side of the mounting component 2, thereby achieving overall structural locking from the bottom of the vehicle to the bottom protective layer.

[0034] Understandably, the battery box is securely connected to the bottom of the vehicle via the connecting column 1, and the protective component 4 serves as lower protection. This combination forms a composite support structure of "lower protection + upper suspension" for the cell assembly 3, achieving stable overall installation of the battery box and improving the safety of the battery system during vehicle operation. The protective component 4, consisting of a bottom protective plate 41 and reinforcing ribs 42, effectively resists damage to the battery from external impacts and road debris, enhancing the structure's impact resistance and extending system life. The mounting component 2 includes a water-cooled mounting plate 21, which is in close contact with the cell assembly 3, helping to quickly dissipate the heat generated by the cells during operation, improving battery thermal management efficiency and ensuring stable battery operation under high performance. The top plate 22, water-cooled mounting plate 21, and insulation box 32 are connected by bolts, resulting in a simple structure that facilitates batch assembly and disassembly, and is beneficial for later inspection, replacement, and maintenance. The cell assembly 3 is installed upside down inside the insulation box 32, within the enclosed space between the protective component 4 and the water-cooled mounting plate 21, providing excellent insulation and encapsulation, thus enhancing the safety performance of the cells. The elastic element 23 is disposed between the water-cooled mounting plate 21 and the bottom of the vehicle. When the bottom is hit or the battery box is deformed, the elastic element 23 can prevent the battery cell assembly 3 from hitting the bottom of the vehicle, thus avoiding battery cell impact and fire and improving the safety performance of the battery box.

[0035] In some embodiments of this application, the reinforcing rib 42 is a hollow structure; multiple reinforcing ribs 42 are provided and arranged in a triangular pattern on the upper side of the bottom protective plate 41.

[0036] Understandably, the reinforcing rib 42 employs a hollow structure design, specifically a plate-like component with an internal cavity. Compared to solid reinforcing ribs, the hollow structure effectively reduces overall weight and vehicle load while ensuring sufficient structural strength and rigidity. Simultaneously, the hollow structure also possesses a certain energy absorption capacity, playing a role in absorbing and dispersing energy during bottom impacts or collisions, further enhancing the protection performance of the battery pack. Multiple reinforcing ribs 42 are provided, arranged in a triangular pattern on the upper surface of the bottom protective plate. The triangle is one of the most stable geometric shapes in structural mechanics; this arrangement can evenly distribute loads in multiple directions, enhancing the overall bending and torsional resistance of the bottom protective plate 41. The triangular arrangement of multiple reinforcing ribs 42 not only improves load-bearing capacity and overall rigidity but also gives the protective component 4 stronger stability and deformation control when facing irregular load impacts.

[0037] In some embodiments of this application, the thickness of the reinforcing ribs is 3-5 mm; the thickness of the bottom protective plate is 3-20 mm.

[0038] In some embodiments of this application, the protective component 4 has a connecting hole 43 that mates with the connecting post 1, the lower end of the connecting post 1 is placed in the connecting hole 43 and is fixedly connected to the protective component 4.

[0039] Understandably, after the lower end of the connecting post 1 is inserted into the connecting hole 43, it is mechanically fastened (such as by bolting, welding, riveting, or fixing with locating pins) to achieve a firm connection with the protective component 4, thus forming a complete and stable structural support system. This connection method not only enhances the connection strength between the connecting post and the protective component, but also can withstand the vertical load and impact load generated during vehicle operation, preventing problems such as loosening, shaking, or sinking of the battery box.

[0040] In some embodiments of this application, the water-cooled mounting plate 21 is provided with a fixing position 211, which is connected to the bottom protective plate 41 by bolts, so that the water-cooled mounting plate 21 is installed above the bottom protective plate 41.

[0041] Specifically, during installation, the fixing position 211 is aligned with the corresponding mounting holes on the bottom protective plate 41, and the mounting bolts are passed through the holes in both positions and tightened, so that the water-cooled mounting plate 21 is securely installed on top of the bottom protective plate 41. This rigid fixing method using bolts has the advantages of convenient assembly and disassembly and reliable connection, ensuring that the water-cooled mounting plate will not loosen, shift, or warp during vehicle operation. The layout of the fixing position 211 has been structurally optimized and is symmetrically distributed, achieving uniform load transfer on the bottom protective plate and avoiding structural stress concentration problems caused by localized force concentration.

[0042] In some embodiments of this application, the upper end of the elastic element 23 is connected to the bottom of the car, and the lower end is connected to the water-cooled mounting plate 21.

[0043] In some embodiments of this application, the elastic element 23 is in a compressed state.

[0044] Specifically, when the battery box is damaged by bottoming out or deformed, the elastic element 23 can prevent the battery cell assembly 31 from hitting the bottom of the vehicle, thus avoiding battery cell impact and fire and improving the safety performance of the battery box.

[0045] In some embodiments of this application, the battery cell 31 is provided with battery cell contacts 311, and the bottom of the insulation box 32 is provided with an elliptical placement hole 321 that cooperates with the battery cell contacts 311.

[0046] Specifically, the insulation box 32 is a shell structure with good electrical insulation performance, which can effectively isolate the electrical coupling between the battery cell and other conductive components of the box, preventing electrical safety hazards such as short circuits and breakdowns. The internal shape of the insulation box 32 is customized according to the size and arrangement of the battery cell 31. The battery cell 31 is placed in the insulation box 32 in an inverted manner, that is, the positive and negative terminals of the battery cell contact 311 face downwards, which helps to improve the stability of the component during vehicle operation.

[0047] In some embodiments of this application, the distance between the bottom end of the battery cell assembly 3 and the top end of the protective component 4 is 50-200mm.

[0048] Understandably, when a vehicle bottoms out or is impacted by an obstacle during operation, the protective components bear the external impact first. A gap of 50–200 mm can effectively prevent the impact force from being directly transmitted to the battery cell body, improving the overall impact resistance. This gap space can also serve as part of the heat dissipation air channel, facilitating the inflow of cold air and the outflow of hot air, thus improving heat dissipation efficiency. Reserving a certain vertical space helps with thermal expansion or slight structural deformation during operation, avoiding hard contact between the battery cell assembly and the protective plate.

[0049] In some embodiments of this application, the anti-bottoming battery box is applied to a vehicle.

[0050] In summary, the connection holes between the connecting posts and the protective components ensure reliable fixation of the battery box to the vehicle's underside, enhancing installation stability. The protective components consist of a bottom protective plate and multiple hollow reinforcing ribs arranged in a triangular pattern, providing high overall structural strength, excellent bending and impact resistance, and preventing damage to the battery cells from external impacts. The water-cooled mounting plate is positioned above the protective components and connected to the bottom protective plate via bolts, featuring a compact structure and excellent heat dissipation, providing an efficient cooling channel for the battery cell assembly. The battery cells are installed upside down inside the insulating box and sequentially bolted together via the screw holes in the top plate, water-cooled mounting plate, and insulating box, forming a multi-layered fixing method that effectively prevents the cells from loosening or falling off under vibration conditions. An elastic element is positioned between the water-cooled mounting plate and the vehicle's underside and remains under compression. In the event of bottoming out or battery box deformation, the elastic element prevents the battery cell assembly from impacting the vehicle's underside, avoiding cell impact-induced fires and improving the battery box's safety performance. A gap of 50-200mm is provided between the bottom of the battery cell assembly and the top of the protective component, forming an effective heat dissipation and buffer space. The components are mainly connected by bolts, which makes disassembly and assembly convenient and facilitates quick replacement, inspection or maintenance of the battery cell assembly.

[0051] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., 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 this utility model 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 utility model.

[0052] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A bottom-supported battery box, characterized in that, include: The connecting column includes a vehicle connecting end and a column body. The vehicle connecting end is connected to the bottom of the vehicle, and the lower end of the column body is fixedly connected to the protective component to fix the battery box to the bottom of the vehicle. The protective component includes a bottom protective plate and reinforcing ribs, the reinforcing ribs being disposed above the bottom protective plate and fixedly connected to the bottom protective plate; The mounting components include a water-cooled mounting plate, a top plate, and elastic elements; The battery cell assembly includes a battery cell and an insulating box; the battery cell is placed upside down inside the insulating box; The protective component and the water-cooled mounting plate form an installation space for the battery cell assembly. The battery cell assembly is installed in the installation space. The top plate, the water-cooled mounting plate, and the insulation box are all provided with screw holes that mate with bolts. The bolts pass through the screw holes of the top plate, the water-cooled mounting plate, and the insulation box in sequence to fix the battery cell assembly to the underside of the mounting component.

2. The anti-bottom-drop battery box according to claim 1, characterized in that, The reinforcing ribs are hollow structures; multiple reinforcing ribs are arranged in a triangular pattern on the upper side of the bottom protective plate.

3. The anti-bottom-drop battery box according to claim 1, characterized in that, The thickness of the reinforcing rib is 3-5mm; the thickness of the bottom protective plate is 3-20mm.

4. The anti-bottom-drop battery box according to claim 1, characterized in that, The protective component has a connection hole that mates with the connecting post. The lower end of the connecting post is placed in the connection hole and is fixedly connected to the protective component.

5. A bottom-supported battery box according to claim 1, characterized in that, The water-cooled mounting plate is provided with a fixed position, which is connected to the bottom protective plate by bolts, so that the water-cooled mounting plate is installed on top of the bottom protective plate.

6. A bottom-supported battery box according to claim 1, characterized in that, The upper end of the elastic element is connected to the bottom of the car, and the lower end is connected to the water-cooled mounting plate.

7. A bottom-supported battery box according to claim 1, characterized in that, The elastic element is in a compressed state.

8. A bottom-supported battery box according to claim 1, characterized in that, The battery cell is provided with battery cell contacts, and the bottom of the insulating box is provided with an elliptical placement hole that mates with the battery cell contacts.

9. A bottom-supported battery box according to claim 1, characterized in that, The distance between the bottom of the battery cell assembly and the top of the protective component is 50-200mm.

10. A bottom-supported battery box according to any one of claims 1-9, characterized in that, Applied to vehicles.

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