A clamping shell for a battery pack

Abstract

The utility model relates to a kind of clamping shell for battery pack in the field of battery pack shell, including bottom shell and shell cover being set on base in pair, the inside of bottom shell is formed with the containing cavity for accommodating battery pack, the bottom wall of the containing cavity is formed with the raised support grid, the bottom wall of containing cavity is provided with protective pad, installation chamber and control chamber are formed by vertical partition in containing cavity, multiple limit clamping plates are detachably connected in installation chamber, multiple limit clamping plates are formed around the protective frame for matching plug-in battery pack, limit clamping plate is connected with protective press plate for applying to battery pack The utility model raised support grid is made of longitudinal and transverse interlaced reinforcing rib, forms frame type support structure, effectively enhances the deformation resistance of the bottom of bottom shell, meanwhile, multiple limit clamping plates are formed around the protective frame, can provide lateral support protection to the periphery of battery pack, ensure the protective support safety and reliability of bottom shell to battery pack.

Description

Technical Field

[0001] This utility model relates to the field of battery pack housings, and more specifically to a snap-fit ​​housing for battery packs. Background Technology

[0002] With the rapid development of new energy vehicles, energy storage power stations and other fields, the snap-fit ​​housing of battery packs has a wide range of applications. The stainless steel battery box in the snap-fit ​​housing is the core load-bearing structure of the stainless steel battery box. It needs to meet the requirements of modular assembly, quick disassembly and assembly and high protection performance. Its design rationality directly affects the safety and reliability of the battery system.

[0003] Existing stainless steel battery boxes typically employ a modular box structure, consisting of four parts: an outer shell, a cover, and protective components. The outer shell contains a battery compartment for installing the battery pack and an electrical compartment for housing the electronic control components. The protective components are housed within the battery compartment for protection. The cover is bolted to the outer shell, and a handle is provided on either the cover or the outer shell.

[0004] However, existing battery pack snap-fit ​​housings still have certain drawbacks: their current structures are relatively simple, and during handling or transfer, they do not provide sufficient support for the internal battery modules. Vibrations or external impacts can easily cause housing deformation and loosening of the snap-fit ​​structure, leading to abnormalities in the internal battery modules. Furthermore, the lack of an overall frame support means that the battery pack cannot be effectively protected, reducing its safety under complex operating conditions and severely restricting the application of stainless steel battery boxes in high-performance, high-reliability scenarios. Therefore, there is an urgent need for a snap-fit ​​housing with better support and protection to improve the safety and reliability of battery pack protection. Utility Model Content

[0005] The purpose of this utility model is to solve the above-mentioned defects and provide a snap-fit ​​housing for battery packs, so as to solve the technical problem in the background art of how to improve the support and protection effect of the snap-fit ​​housing for battery packs, thereby improving the safety and reliability of battery pack protection.

[0006] The objective of this utility model is achieved through the following means:

[0007] A snap-fit ​​housing for a battery pack includes a bottom shell and a cover mated on a base. The bottom shell has an internal cavity for accommodating the battery pack, and an opening communicating with the cavity. The bottom wall of the cavity has a raised support frame composed of intersecting reinforcing ribs. A protective pad is provided on the bottom wall of the cavity and nested on the support frame. The cavity is divided into an installation chamber and a control chamber by vertical partitions. Multiple limiting plates are detachably connected to the installation chamber. The multiple limiting plates surround to form a protective frame for mating and inserting the battery pack, allowing the multiple limiting plates to clamp and limit the outer side of the battery pack. Protective pressure plates are connected to the limiting plates to apply pressure and limit the battery pack. The cover mated on the bottom shell and can seal and cover the opening. The bottom shell is connected to the cover via a snap-fit ​​structure and locked to the cover via a connector.

[0008] Furthermore, as described above, the support frame is provided with protrusions to create a support gap between the battery pack and the bottom wall of the receiving cavity. The support frame creates a grid on the bottom wall of the receiving cavity, and protective pads are installed in pairs within the grid, with the top of the protective pads contacting the bottom support of the battery pack.

[0009] A raised support grid forms a mesh bottom wall structure, which, together with nested protective pads, creates a support gap between the battery pack and the bottom wall. The bending stiffness of the reinforcing ribs disperses external impact stress, preventing localized stress concentration that could lead to casing deformation. The raised support grid creates a gap between the battery pack and the bottom wall of the casing, reducing the impact of bottom impacts and compression on the battery pack. The protective pads, in direct contact with the bottom of the battery pack, absorb vibration energy and reduce direct impact with the support grid, thus improving the support strength of the battery pack.

[0010] Furthermore, as described above, the limiting plate is composed of a honeycomb plate, with multiple honeycomb holes inside the honeycomb plate. The honeycomb plate enhances the support and protection for the sides of the battery pack.

[0011] Furthermore, as described above, the limiting plate includes a contact portion and a plurality of heat dissipation fins disposed on the contact portion. The contact portion contacts the outer side of the battery pack, the heat dissipation fins extend toward the inner wall of the receiving cavity, and a ventilation gap is formed between two adjacent heat dissipation fins. Multiple limiting plates are distributed around the battery pack and are installed in pairs in the installation chamber.

[0012] The contact portion physically limits the battery pack by contacting the outer side, while the heat dissipation fins extend inward to form ventilation gaps. The fins reduce the operating temperature rise of the battery pack by promoting air convection, improve temperature uniformity, and prevent performance degradation caused by excessive temperature differences between individual cells. At the same time, the ventilation gaps optimize the thermal management path and improve thermal stability under complex operating conditions.

[0013] Furthermore, as described above, the limiting plate includes two first limiting plates and two second limiting plates. The two first limiting plates are arranged opposite to each other on both sides of the battery pack, and the two first limiting plates are provided with through clearance holes. The two second limiting plates are distributed opposite to each other on both sides of the battery pack, and the first limiting plates and the second limiting plates surround each other to form a protective frame.

[0014] Two first limiting plates and two second limiting plates are distributed opposite each other to form a protective frame. The clearance hole design of the first limiting plates is compatible with heat dissipation channels or wiring harness layouts. This structure enhances the fixing strength around the battery pack through grid-like limiting, and the surrounding arrangement of the limiting plates reduces the impact of side compression or impact on the battery pack. At the same time, the clearance holes and ventilation gaps work together to optimize the heat dissipation efficiency in contact with the battery pack.

[0015] Furthermore, as described above, the side of the partition is provided with a through hole that connects to the installation chamber and the control chamber.

[0016] The through-holes allow for the installation of corresponding wiring harnesses in the battery pack within the control room and the installation room. Meanwhile, the through-holes on the side of the partition connect the installation room and the control room, forming an airflow path. This design promotes the circulation of hot air inside the battery pack.

[0017] Furthermore, the protective pressure plate has connecting portions at both ends, with connecting holes on the connecting portions. The first limiting plate has fixing holes that match the connecting holes, so that the protective pressure plate is connected to the fixing holes by bolts passing through the connecting holes. A pressing pad that contacts the battery pack is adhered to the inner side of the protective pressure plate.

[0018] The protective pressure plate is connected to the fixing holes of the first limiting plate by bolts, and the inner clamping pad directly contacts the battery pack. This design ensures stable clamping force through mechanical fixing, and the clamping pad absorbs vibration energy, reducing the battery pack's vertical movement, squeezing, and collision under complex operating conditions, thereby improving the reliability and safety of the fixing.

[0019] Furthermore, as described above, the limiting plate has a buffer pad bonded to its inner side near the battery pack, so that the buffer pad contacts the outer side of the battery pack.

[0020] The buffer pads bonded to the inner side of the limiting plate directly contact the outer side of the battery pack. The elastic deformation of the buffer pads absorbs the impact energy, reducing mechanical damage to the outer side of the battery pack. This solves the problem of battery pack damage caused by insufficient protection of traditional structures and improves impact resistance.

[0021] Furthermore, as described above, the cover has an outer edge and an inner edge, and a mating insertion gap is formed between the outer edge and the inner edge. The latch structure includes a latch and a lug. The latch is installed on the outside of the bottom shell, and the lug is installed on the outer edge of the cover and corresponds to the number and position of the latch. The side of the bottom shell is connected to the outer edge of the cover by screws.

[0022] The outer and inner edges form an insertion gap, and the latch and lugs work together to achieve quick snap-fitting of the cover and the bottom shell. The cover is connected to the bottom shell by bolts passing through the side, which improves the reliability and stability of the sealing and locking of the cover and the bottom shell.

[0023] This sealing structure can effectively prevent external dust, moisture and other impurities from entering the cavity. At the same time, the mechanical locking enhances the overall structural rigidity of the shell, further improving the safety protection level of the battery pack in high-performance and high-reliability scenarios.

[0024] Furthermore, as described above, the bottom shell is connected to a handle on its side. Two handles are provided, and the two handles are symmetrically arranged on both sides of the bottom shell. The symmetrically arranged handles on both sides of the bottom shell facilitate handling and transfer.

[0025] The beneficial effects of this utility model are as follows: The cavity is divided into an installation chamber and a control chamber by vertical partitions, achieving functional zoning and isolation. The raised support frame is composed of crisscrossing reinforcing ribs, forming a frame-like support structure that effectively enhances the bottom shell's resistance to deformation. During handling or transfer, it can withstand external impact forces, preventing deformation of the bottom shell from affecting the battery pack. Protective pads are nested on the support frame, providing support and buffering for the bottom of the battery pack, reducing rigid collisions. Combined with the bottom protection system formed by the support frame, this significantly improves the safety and reliability of the bottom shell's protection and support for the battery pack. Simultaneously, multiple detachable limiting plates within the installation chamber form a protective frame, providing lateral support and protection to the battery pack. The protective pressure plates connected to the limiting plates apply vertical pressure to the battery pack, effectively suppressing shaking in a vibration environment, preventing loosening of the snap-fit ​​structure, and ensuring the stability of the battery pack installation. The cover and bottom shell are quickly paired and installed via a snap-fit ​​structure and locked with screws, ensuring reliable sealing. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0027] Figure 2 This is a schematic diagram showing the opening of the cover and bottom shell in this embodiment;

[0028] Figure 3 This is a cross-sectional view of this embodiment;

[0029] Figure 4 for Figure 3 A magnified view of part A in the diagram;

[0030] Figure 5 This is a schematic diagram of the internal structure of the bottom shell in this embodiment;

[0031] Figure 6 This is an exploded view of the structure of this embodiment;

[0032] The reference numerals in the figure are as follows: 1-bottom shell, 2-shell cover, 3-accommodating cavity, 4-supporting grid frame, 5-protective pad, 6-partition, 7-installation chamber, 8-control chamber, 9-protective pressure plate, 10-support gap, 11-contact part, 12-heat dissipation fins, 13-first limiting plate, 14-second limiting plate, 15-avoidance hole, 16-through hole, 17-connecting part, 18-connecting hole, 19-pressing pad, 20-outer edge, 21-inner edge, 22-insertion gap, 23-clasp, 24-hooking lug, 25-handle. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0034] To make the technical problem to be solved, the technical solution and the beneficial effects of this utility model clearer, the following describes the solution in further detail with reference to the accompanying drawings and embodiments.

[0035] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" 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 scheme 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.

[0036] In this embodiment, refer to Figures 1-6The present invention relates to a snap-fit ​​housing for a battery pack, comprising a bottom shell 1 and a cover 2 mating on a base. The bottom shell 1 has an internal cavity 3 for accommodating the battery pack, and an opening communicating with the cavity 3. The bottom wall of the cavity 3 has a protruding support frame 4 composed of intersecting reinforcing ribs. A protective pad 5 is provided on the bottom wall of the cavity 3, nested within the support frame 4. Vertical partitions 6 pass through the cavity 3. The row spacing forms an installation chamber 7 and a control chamber 8. Four limiting plates are detachably connected in the installation chamber 7. The four limiting plates surround to form a protective frame for mating and inserting battery packs, so that the four limiting plates can hold and limit the outside of the battery pack. Protective pressure plates 9 are connected to the limiting plates for applying pressure and limiting to the battery pack. The cover 2 is mated and installed on the bottom cover 1 and can seal and cover the opening. The bottom cover 1 is connected to the cover 2 through the buckle 23 structure and is locked to the cover 2 through the connector.

[0037] Specifically, in this embodiment, the support frame 4 is provided with protrusions to form a support gap 10 between the battery pack and the bottom wall of the receiving cavity 3. The support frame 4 forms a grid on the bottom wall of the receiving cavity 3. The protective pads 5 are installed in pairs within the grid, and the top of the protective pads 5 is in contact with the bottom support of the battery pack.

[0038] A grid bottom wall structure is formed by the raised support frame 4, which, together with the nested protective pads 5, creates a support gap 10 between the battery pack and the bottom wall. The bending stiffness of the reinforcing ribs disperses external impact stress, preventing local stress concentration that could lead to shell deformation. The raised support frame 4 creates a gap between the battery pack and the bottom wall of the bottom shell 1, thereby reducing the impact of bottom impact and compression on the battery pack. The protective pads 5 directly contact the bottom of the battery pack, absorbing vibration energy and reducing direct impact with the support frame 4, thus improving the support strength of the battery pack.

[0039] In this embodiment, the limiting plate includes a contact portion 11 and a plurality of heat dissipation fins 12 disposed on the contact portion 11. The contact portion 11 contacts the outer side of the battery pack, the heat dissipation fins 12 extend toward the inner wall of the receiving cavity 3, and a ventilation gap is formed between two adjacent heat dissipation fins 12. The multiple limiting plates are distributed around the battery pack and are installed in pairs in the installation chamber 7.

[0040] The contact portion 11 contacts the outer side of the battery pack to achieve physical limitation, and the heat dissipation fins 12 extend into the inner wall to form a ventilation gap. The fins reduce the operating temperature rise of the battery pack by promoting air convection, improve temperature uniformity, and avoid performance degradation caused by excessive temperature differences between individual cells. At the same time, the ventilation gap optimizes the thermal management path and improves thermal stability under complex operating conditions.

[0041] In some embodiments, the limiting plate is made of a honeycomb plate, with multiple honeycomb holes inside the honeycomb plate. The honeycomb plate enhances the support and protection of the battery pack sides.

[0042] Specifically, in this embodiment, the limiting plate includes two first limiting plates 13 and two second limiting plates 14. The two first limiting plates 13 are arranged opposite to each other on both sides of the battery pack, and the two first limiting plates 13 are provided with through clearance holes 15. The two second limiting plates 14 are distributed opposite to each other on both sides of the battery pack.

[0043] Two first limiting plates 13 and two second limiting plates 14 are distributed opposite each other to form a protective frame. The clearance holes 15 of the first limiting plates 13 are designed to be compatible with heat dissipation channels or wiring harness layouts. This structure enhances the fixing strength around the battery pack through grid-like limiting, and reduces the impact of side compression or impact on the battery pack through the surrounding setting of the limiting plates. At the same time, the clearance holes 15 and ventilation gaps work together to optimize the heat dissipation efficiency in contact with the battery pack.

[0044] Specifically, in this embodiment, the side of the partition 6 is provided with a through hole 16 that communicates with the installation chamber 7 and the control chamber 8. The through hole 16 allows the battery pack in the control chamber 8 and the installation chamber 7 to be installed with corresponding wiring harnesses. At the same time, the through hole 16 on the side of the partition 6 connects the installation chamber 7 and the control chamber 8, forming an air circulation path. This design promotes the circulation of hot air inside the battery pack.

[0045] Specifically, in this embodiment, the protective pressure plate 9 has connecting portions 17 at both ends, with connecting holes 18 on the connecting portions 17. The first limiting plate 13 has fixing holes that match the connecting holes 18, allowing the protective pressure plate 9 to be connected to the fixing holes via bolts passing through the connecting holes 18. A clamping pad 19, which contacts the battery pack, is adhered to the inner side of the protective pressure plate 9. The protective pressure plate 9 is connected to the fixing holes of the first limiting plate 13 via bolts, and the clamping pad 19 adhered to its inner side directly contacts the battery pack. This design ensures stable clamping force through mechanical fixing, and the clamping pad 19 absorbs vibration energy, reducing the battery pack's vertical movement, squeezing, and collision under complex working conditions, thus improving the reliability and safety of the fixing.

[0046] In some embodiments, a buffer pad (not shown) is bonded to the inner side of the limiting plate near the battery pack, allowing the buffer pad to contact the outer side of the battery pack. The buffer pad bonded to the inner side of the limiting plate directly contacts the outer side of the battery pack. The elastic deformation of the buffer pad absorbs impact energy, reducing mechanical damage to the outer side of the battery pack, solving the problem of battery pack damage caused by insufficient protection in traditional structures, and improving impact resistance.

[0047] Specifically, in this embodiment, the protective pad 5, the pressing pad 19, and the buffer pad are all made of silicone protective pads.

[0048] Specifically, in this embodiment, the cover 2 has an outer flange 20 and an inner flange 21, with a mating insertion gap 22 between the outer flange 20 and the inner flange 21. The latch 23 structure includes a latch 23 and a lug 24. The latch 23 is installed on the outside of the bottom shell 1, and the lug 24 is installed on the outer flange 20 of the cover 2 and corresponds to the number and position of the latch 23. The side of the bottom shell 1 is connected to the outer flange of the cover 2 by screws. The outer flange 20 and the inner flange 21 form the insertion gap 22. The latch 23 and the lug 24 cooperate to realize the quick fastening and mating of the cover 2 and the bottom shell 1, and are connected to the cover 2 by bolts passing through the bottom shell 1 from the side, improving the reliability and stability of the sealing and locking of the cover 2 and the bottom shell 1.

[0049] Specifically, in this embodiment, the bottom shell 1 is connected to a handle 25 on its side. There are two handles 25, and the two handles 25 are symmetrically arranged on both sides of the bottom shell 1. The symmetrically arranged handles 25 on both sides of the bottom shell 1 facilitate handling and transfer.

[0050] The specific operating principle in this embodiment is as follows:

[0051] The bottom shell 1 is provided with crisscrossing raised reinforcing ribs to form a frame-type support grid 4 to strengthen the support structure. The cavity 3 is divided into an installation chamber 7 and a control chamber 8 by vertical partitions 6 to achieve functional zoning and isolation. The support grid 4 on the bottom wall of the cavity 3 effectively enhances the bottom deformation resistance of the bottom shell 1 and can withstand external impact during handling or transfer. The raised design creates a gap between the battery pack and the bottom wall of the cavity 3 to prevent the bottom of the bottom shell 1 from being deformed by collision and affecting the battery pack. Protective pads 5 are embedded in the grid of the support grid 4 to provide support and buffer for the bottom of the battery pack and reduce rigid collisions at the bottom of the battery pack. The bottom protection system formed by the support grid 4 significantly improves the safety and reliability of the bottom shell 1 in protecting and supporting the bottom of the battery pack.

[0052] Meanwhile, multiple detachable limiting plates inside the installation chamber 7 form a protective frame, providing lateral support and protection to the battery pack. The heat dissipation fins 12 on the limiting plates reduce heat accumulation between the limiting plates and the battery pack. The multiple heat dissipation fins 12 increase the contact area with air, thus enabling heat dissipation. The protective pressure plate 9 connected to the limiting plates applies vertical pressure to the battery pack, effectively suppressing the battery pack's up-and-down movement in a vibration environment, preventing the snap-fit ​​structure from loosening, and ensuring the stability of the battery pack installation. The cover 2 and the bottom cover 1 are quickly paired and installed through the snap-fit ​​structure 23 and locked with screws to ensure the reliability of the sealing cover.

[0053] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.

Claims

1. A snap-fit ​​housing for a battery pack, comprising a bottom shell and a cover matingly disposed on a base, wherein the bottom shell has an internal cavity for accommodating the battery pack, and an opening communicating with the cavity is provided on the bottom shell, characterized in that: The bottom wall of the receiving cavity has a raised support frame, which is composed of crisscrossing reinforcing ribs. The bottom wall of the receiving cavity is provided with protective pads, which are nested on the support frame. The receiving cavity is divided into an installation chamber and a control chamber by vertical partitions. Multiple limiting plates are detachably connected in the installation chamber. The multiple limiting plates surround to form a protective frame for mating and inserting battery packs, so that the multiple limiting plates can hold and limit the outside of the battery pack. Protective pressure plates are connected to the limiting plates to apply pressure and limit the battery pack. The shell cover is mated and installed on the bottom shell and can seal and cover the opening. The bottom shell is connected to the shell cover by a snap-fit ​​structure and locked to the shell cover by screws.

2. The snap-fit ​​housing for a battery pack according to claim 1, characterized in that: The support frame, with its protrusions, can be used to create a support gap between the battery pack and the bottom wall of the receiving cavity. The support frame also forms a grid on the bottom wall of the receiving cavity. Protective pads are installed in pairs within the grid, and the top of the protective pads contacts the bottom support of the battery pack.

3. The snap-fit ​​housing for a battery pack according to claim 1, characterized in that: The limiting plate includes a contact portion and several heat dissipation fins disposed on the contact portion. The contact portion contacts the outer side of the battery pack, the heat dissipation fins extend toward the inner wall of the receiving cavity, and a ventilation gap is formed between two adjacent heat dissipation fins. Multiple limiting plates are distributed around the battery pack and are installed in pairs in the installation chamber.

4. The snap-fit ​​housing for a battery pack according to claim 3, characterized in that: The limiting plate includes two first limiting plates and two second limiting plates. The two first limiting plates are arranged opposite to each other on both sides of the battery pack, and the two first limiting plates are provided with through clearance holes. The two second limiting plates are distributed opposite to each other on both sides of the battery pack.

5. The snap-fit ​​housing for a battery pack according to claim 1, characterized in that: The side of the partition has through holes that connect to the installation room and the control room.

6. The snap-fit ​​housing for a battery pack according to claim 4, characterized in that: The protective pressure plate has connecting parts at both ends, and connecting holes are provided on the connecting parts. The first limiting plate has fixing holes that match the connecting holes, so that the protective pressure plate is connected to the fixing holes by bolts passing through the connecting holes. A pressing pad that contacts the battery pack is adhered to the inner side of the protective pressure plate.

7. A snap-fit ​​housing for a battery pack according to any one of claims 1-6, characterized in that: The limiting plate has a buffer pad attached to its inner side near the battery pack, so that the buffer pad contacts the outer side of the battery pack.

8. A snap-fit ​​housing for a battery pack according to any one of claims 1-6, characterized in that: The cover has an outer edge and an inner edge, and a mating insertion gap is formed between the outer edge and the inner edge. The latch structure includes a latch and a lug. The latch is installed on the outside of the bottom shell, and the lug is installed on the outer edge of the cover and corresponds to the number and position of the latch. The side of the bottom shell is connected to the outer edge of the cover by screws.

9. A snap-fit ​​housing for a battery pack according to any one of claims 1-6, characterized in that: The bottom shell has two handles connected to its sides, and the two handles are symmetrically arranged on both sides of the bottom shell.

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