A lightweight battery pack case having distributed stiffeners

Abstract

The utility model relates to battery pack technical field, and disclose a kind of lightweight battery pack shell with distributed reinforcing rib, including lower shell and upper shell, the inside of lower shell and the inside of upper shell are fixedly provided with main reinforcing rib, the inner wall of lower shell bottom end and the inner wall of upper shell top end are fixedly provided with with main reinforcing rib staggered secondary reinforcing rib, the top of lower shell is fixedly provided with support frame one, the bottom of upper shell is fixedly provided with support frame two, the both sides of support frame one bottom end are equipped with a plurality of damping components;By supporting frame one and support frame two fixed connection, shell is fixedly installed, supporting frame one and support frame two can be stressed simultaneously, stable and reliable, by fixing damping component at the bottom end of lower shell, shock absorption can be provided to battery pack shell, battery pack shell is not easy to shake, by setting buffer rubber pad and buffer plate in lower shell bottom end, the effect of anti-collision protection can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, specifically to a lightweight battery pack casing with distributed reinforcing ribs. Background Technology

[0002] A battery pack is a combination of multiple cells connected in series and parallel, and integrates modules such as a battery management system (BMS), a thermal management system, and electrical connection and protection circuits to form a complete power or energy storage unit that can provide the required voltage, capacity and power. The battery pack casing is a key structural component that encloses and protects the entire battery pack. Its core function is to provide mechanical protection (resistance to impact, vibration and extrusion) and environmental isolation (waterproof, dustproof and corrosion-proof) for the delicate and sensitive cells and components inside. It is the first line of defense to ensure the safe, reliable and long-life operation of the battery pack.

[0003] The "buffered impact-resistant battery pack housing" disclosed in application number "202222096430.0" "includes a protective housing and a battery pack, the battery pack is located inside the protective housing, and anti-collision buffer mechanisms are provided on two opposite side walls inside the protective housing. The two sides of the battery pack are in contact with the two sets of anti-collision buffer mechanisms. The anti-collision buffer mechanism includes a buffer connecting component and a recoil clamping component. The recoil clamping component is located inside the protective housing, and the buffer connecting component is located inside the protective housing and symmetrically located on both sides of the recoil clamping component. The two sets of buffer connecting components and recoil clamping components are in sliding contact. This utility model relates to the field of battery pack housing technology, specifically providing a buffered impact-resistant battery pack housing with a two-stage buffer mechanism. The primary stage is used for small-amplitude buffering during normal driving, and the advanced stage is used for buffering when an impact occurs."

[0004] However, the above method still has the following drawbacks: the buffer connection component can play a buffering and protective role, but it requires reserved installation space, which will reduce the utilization rate of the internal space of the protective shell. Moreover, the reserved space does not have internal support, which reduces the overall strength of the protective shell and makes it difficult to meet the requirements of impact and compression. In addition, the buffer connection component is located on both sides of the battery pack, making it difficult to provide effective protection for the bottom of the battery pack. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a lightweight battery pack casing with distributed reinforcing ribs, which has the advantages of not occupying space and meeting the requirements of impact and compression, thus solving the problems mentioned in the background technology.

[0006] This utility model provides the following technical solution: a lightweight battery pack shell with distributed reinforcing ribs, including a lower shell and an upper shell. Main reinforcing ribs are fixedly provided inside both the lower shell and the upper shell. Secondary reinforcing ribs, intersecting with the main reinforcing ribs, are fixedly provided on the inner wall of the bottom of the lower shell and the inner wall of the top of the upper shell. A first support frame is fixedly provided on the top of the lower shell, and a second support frame is fixedly provided on the bottom of the upper shell. The bottom of the second support frame is fixedly connected to the top of the first support frame via connecting bolts. Several vibration damping components are provided on both sides of the bottom of the first support frame. A buffer rubber pad is fixedly provided on the bottom of the lower shell, and a buffer plate is fixedly provided on the bottom of the buffer rubber pad. Several guide components are provided on both sides of the top of the buffer plate.

[0007] As a preferred technical solution of this utility model, the top two sides of the support frame one are provided with slots, and the bottom two sides of the support frame two are fixedly provided with clips. The clips are engaged with the inside of the slots. The surface of the support frame one is provided with a plurality of connecting holes one for inserting and connecting bolts, and the surface of the support frame two is provided with a plurality of connecting holes two for inserting and connecting bolts. The connecting holes two are coaxial with the connecting holes.

[0008] As a preferred technical solution of this utility model, the vibration damping component includes a stacked rubber block, which is formed by stacking and pressing soft and hard rubber. A spring steel sheet is fixedly installed inside the stacked rubber block. A pad is fixedly installed at the bottom end of the stacked rubber block, and a pad is fixedly installed at the top end of the stacked rubber block.

[0009] As a preferred technical solution of this utility model, the surface of the support frame one is provided with a plurality of mounting holes one for mounting thereon, the bottom end of the support frame one is provided with an enlarged groove communicating with the mounting holes one, the pad two is engaged with the inside of the enlarged groove, the surface of the support frame two is provided with a plurality of mounting holes two, the middle part of the stacked rubber block, the middle part of the pad one and the middle part of the pad two are all provided with concentric holes, and the mounting holes one and the mounting holes two are coaxial with the concentric holes.

[0010] As a preferred technical solution of this utility model, the bottom end of the support frame one and the top end of the support frame two are each fixedly provided with a number of reinforcing ribs to strengthen the gap between the lower shell and the upper shell.

[0011] As a preferred technical solution of this utility model, the guide component includes a guide sleeve, the bottom end of which is fixedly connected to the top end of the buffer plate, a groove is provided at the top end of the guide sleeve, a damping rubber ring is embedded at the top of the groove, a guide post is slidably connected to the groove, and the top end of the guide post is fixedly connected to the bottom end of the lower housing.

[0012] As a preferred embodiment of this utility model, a limiting block is fixedly provided at the bottom end of the guide post, and the limiting block is slidably connected to the inner wall of the guide sleeve.

[0013] As a preferred embodiment of this utility model, the buffer rubber pad has several deformation grooves inside, and adhesive grooves communicating with the deformation grooves are opened on both sides of the buffer rubber pad. A rubber plug is bonded inside the adhesive groove, and a vent hole is opened on the surface of the rubber plug.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. By fixing support frame one and support frame two together, the outer shell can be fixedly installed and support frame one and support frame two can bear the force simultaneously, which is stable and reliable. By fixing the vibration damping component to the bottom of the lower shell, the battery pack shell can be provided with vibration damping, and the battery pack shell is not easy to shake. By setting buffer rubber pads and buffer plates at the bottom of the lower shell, it can play a role in anti-collision protection without occupying the internal space of the battery pack shell, which can ensure the utilization rate of the internal space of the battery pack shell. The guide component can guide and limit the buffer plate, and the guide plate is not easy to shake or fall off.

[0015] 2. The main reinforcing ribs separate individual cells, maintaining their stability and preventing them from contacting each other and transferring pressure. The distributed reinforcing rib design, consisting of secondary and main reinforcing ribs, greatly improves the overall rigidity and strength of the casing without significantly increasing wall thickness and weight, achieving high specific strength and high specific stiffness. This effectively reduces the total weight of the battery pack. The grid structure can quickly disperse external impact forces throughout the casing, avoiding stress concentration and significantly improving the safety protection level of the battery module. Furthermore, the reinforcing rib structure increases the surface area of ​​the inner wall of the casing, which helps the heat generated by the battery module to dissipate more efficiently through the casing, thus playing a positive auxiliary role in thermal management. Attached Figure Description

[0016] Figure 1 This is one of the structural schematic diagrams of this utility model; Figure 2 This is the second structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the exploded structure of this utility model; Figure 4 This is a cross-sectional structural diagram of the present invention; Figure 5 This is a schematic diagram of the vibration damping component of this utility model; Figure 6 This is a schematic diagram of the upper shell of this utility model; Figure 7 This is a schematic diagram of the structure of the buffer rubber pad of this utility model; Figure 8 This is a cross-sectional structural diagram of the guide component of this utility model.

[0017] In the diagram: 1. Lower shell; 2. Upper shell; 3. Main reinforcing rib; 4. Secondary reinforcing rib; 5. Support frame one; 6. Support frame two; 7. Mounting hole one; 8. Mounting hole two; 9. Vibration damping component; 901. Overlapping rubber block; 902. Pad one; 903. Pad two; 904. Concentric hole; 10. Connecting hole one; 11. Connecting hole two; 12. Enlarged groove; 13. Slot; 14. Clip strip; 15. Reinforcing rib plate; 16. Buffer plate; 17. Guide component; 1701. Guide sleeve; 1702. Damping rubber ring; 1703. Guide post; 1704. Limiting block; 18. Buffer rubber pad; 19. Deformation groove; 20. Adhesive groove; 21. Rubber plug; 22. Vent hole. Detailed Implementation

[0018] 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.

[0019] Please see Figures 1-8The lightweight battery pack casing with distributed reinforcing ribs includes a lower casing 1 and an upper casing 2. Main reinforcing ribs 3 are fixedly installed inside both the lower casing 1 and the upper casing 2. Secondary reinforcing ribs 4, intersecting with the main reinforcing ribs 3, are fixedly installed on the inner wall of the bottom of the lower casing 1 and the inner wall of the top of the upper casing 2. A support frame 5 is fixedly installed on the top of the lower casing 1, and a support frame 6 is fixedly installed on the bottom of the upper casing 2. The bottom of the support frame 6 is fixedly connected to the top of the support frame 5 via connecting bolts. Several vibration damping components 9 are provided on both sides of the bottom of the support frame 5. A buffer rubber pad 18 is fixedly installed on the bottom of the lower casing 1, and a buffer plate 16 is fixedly installed on the bottom of the buffer rubber pad 18. Several guide components 17 are provided on both sides of the top of the buffer plate 16. The main reinforcing ribs 3 can separate individual cells, maintaining the stability of individual cells and preventing single-cell damage. The battery cells contact each other and transmit pressure. The distributed reinforcing rib design, consisting of secondary reinforcing rib 4 and main reinforcing rib 3, greatly improves the overall rigidity and strength of the shell without significantly increasing the wall thickness and weight. It achieves high specific strength and high specific stiffness, effectively reducing the total weight of the battery pack. The grid structure can quickly disperse external impact force to the entire shell, avoid stress concentration, and significantly improve the safety protection level of the battery module. In addition, the reinforcing rib structure increases the surface area of ​​the inner wall of the shell, which is conducive to the more efficient dissipation of heat generated by the battery module through the shell, and has a positive auxiliary role in thermal management. By fixing the support frame 1 5 and support frame 2 6, after the shell is fixedly installed, support frame 1 5 and support frame 2 6 can bear the force simultaneously, which is stable and reliable. The vibration damping component 9 can provide vibration damping for the battery pack shell, making the battery pack shell less prone to shaking. In this embodiment, preferably, the vibration damping component 9 includes a laminated rubber block 901, which is formed by pressing together soft and hard rubber. A spring steel sheet is fixedly installed inside the laminated rubber block 901. A pad 902 is fixedly installed at the bottom end of the laminated rubber block 901, and a pad 903 is fixedly installed at the top end of the laminated rubber block 901. A plurality of mounting holes 7 are opened on the surface of the support frame 5 for mounting. An enlarged groove 12 communicating with the mounting holes 7 is opened at the bottom end of the support frame 5. The pad 903 is engaged with the inside of the enlarged groove 12. A plurality of mounting holes are opened on the surface of the support frame 6. Concentric holes 904 are provided in the middle of the composite rubber block 901, the middle of the pad 1 902, and the middle of the pad 2 903. The mounting holes 1 7 and 2 8 are coaxial with the concentric holes 904. Mounting bolts can be passed through the concentric holes 904, mounting holes 1 7, and mounting holes 2 8. When installing the support frame 1 5 and the support frame 2 6, the composite rubber block 901 can be fixed. The composite rubber block 901 can reduce vibration of the lower housing 1. Because it is made of soft and hard rubber, it takes into account both rigidity and deformation capacity. The spring steel sheet can prevent lateral buckling. The setting of the enlarged groove 12 can limit the pad 2 903. In this embodiment, preferably, the guide assembly 17 includes a guide sleeve 1701, the bottom end of which is fixedly connected to the top end of the buffer plate 16. A groove is provided at the top end of the guide sleeve 1701, and a damping rubber ring 1702 is embedded at the top of the groove. A guide post 1703 is slidably connected to the groove. The top end of the guide post 1703 is fixedly connected to the bottom end of the lower housing 1, and a limiting block 1704 is fixedly provided at the bottom end of the guide post 1703. The limiting block 1704 is slidably connected to the inner wall of the guide sleeve 1701. The guide sleeve 1701 and the guide post 1703 can guide the buffer plate 16 and prevent the buffer plate 16 from tilting. The damping rubber ring 1702 can provide sliding damping between the guide sleeve 1701 and the guide post 1703, thus avoiding the generation of resonance. In this embodiment, preferably, slots 13 are provided on both sides of the top of the support frame 1 5, and clips 14 are fixed on both sides of the bottom of the support frame 2 6. The clips 14 are engaged with the slots 13. Several connecting holes 10 are provided on the surface of the support frame 1 5 for connecting bolts to pass through. Several connecting holes 21 are provided on the surface of the support frame 2 6 for connecting bolts to pass through. The connecting holes 21 are coaxial with the connecting holes 10. Several reinforcing ribs 15 are fixed on the bottom of the support frame 1 5 and the top of the support frame 2 6 to strengthen the space between the lower shell 1 and the upper shell 2. The slots 13 and clips 14 can maintain the positioning accuracy and temperature reliability between the support frame 2 6 and the support frame 1 5. The connecting holes 10 and 21 can be used to pass through the connecting bolts. The reinforcing ribs 15 can improve the strength of the support frame 1 5 and the support frame 2 6. In this embodiment, preferably, the buffer rubber pad 18 has a plurality of deformation grooves 19 inside, and adhesive grooves 20 communicating with the deformation grooves 19 are provided on both sides of the buffer rubber pad 18. A rubber plug 21 is bonded inside the adhesive groove 20, and a vent hole 22 is provided on the surface of the rubber plug 21. The deformation grooves 19 can ensure the deformation ability of the buffer rubber pad 18. By bonding the rubber plug 21 into the adhesive groove 20, it can play a role in preventing dust, and dust is not easy to enter the deformation groove 19. The vent hole 22 can ensure the air permeability.

[0020] When in use, carefully place the battery module into the lower housing 1, ensuring that each individual battery is effectively separated by the main reinforcing rib 3 to prevent them from contacting each other. Cover the lower housing 1 with the upper housing 2, aligning the locking strip 14 at the bottom of the second support frame 6 with the locking groove 13 at the top of the first support frame 5 to achieve initial positioning. Use connecting bolts to pass through the connecting hole 11 of the second support frame 6 and the connecting hole 10 of the first support frame 5 in sequence to secure the upper housing 2 and the lower housing 1. At this time, the first support frame 5 and the second support frame 6 share the force, enhancing the overall structural stability. The reinforcing rib 15 further strengthens the connection parts. The assembled battery pack casing is placed in the predetermined position on the mounting base (such as a vehicle chassis or equipment bracket). The mounting holes 7 and 8 on the support frame 1 and support frame 2 are aligned with the mounting points on the base. The mounting bolts pass through the mounting hole 2, the concentric hole 904 of the vibration damping component 9, and the mounting hole 7 in sequence, and are finally threaded and tightened to the base. During this process, the pad 903 of the vibration damping component 9 is positioned in the enlarged groove 12 at the bottom of the support frame 1. After the bolts are tightened, the vibration damping component 9 (especially its internal laminated rubber block 901 and spring steel sheet) is compressed, which can provide effective vibration damping and buffering for the battery pack casing during vehicle or equipment operation, reducing vibration. After the outer shell is fixed, the bottom buffer plate 16 and the buffer rubber pad 18 form the first anti-collision barrier. When the bottom is impacted, the buffer rubber pad 18 deforms first. The deformation groove 19 inside helps to absorb energy. The impact force is transmitted through the guide component 17. The guide post 1703 slides in the guide sleeve 1701. The limit block 1704 prevents it from falling out and ensures that the buffer plate 16 moves in a straight line to avoid tilting. The damping rubber ring 1702 provides sliding damping and suppresses possible resonance. The rubber plug 21 and vent 22 on the side of the buffer rubber pad 18 keep the buffer cavity breathable while preventing dust. The distributed reinforcing rib design composed of the secondary reinforcing rib 4 and the main reinforcing rib 3 can improve the overall rigidity and strength of the shell without significantly increasing the wall thickness and weight, achieving high specific strength and high specific stiffness. The grid structure can quickly disperse the external impact force to the entire shell and avoid stress concentration.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lightweight battery pack casing with distributed reinforcing ribs, comprising a lower casing (1) and an upper casing (2), characterized in that: The interior of the lower shell (1) and the interior of the upper shell (2) are both fixedly provided with main reinforcing ribs (3). The inner wall of the bottom end of the lower shell (1) and the inner wall of the top end of the upper shell (2) are both fixedly provided with secondary reinforcing ribs (4) that intersect with the main reinforcing ribs (3). The top of the lower shell (1) is fixedly provided with a support frame one (5). The bottom of the upper shell (2) is fixedly provided with a support frame two (6). The bottom end of the support frame two (6) is fixedly connected to the top end of the support frame one (5) by connecting bolts. Several vibration damping components (9) are provided on both sides of the bottom end of the support frame one (5). The bottom end of the lower shell (1) is fixedly provided with a buffer rubber pad (18). The bottom end of the buffer rubber pad (18) is fixedly provided with a buffer plate (16). Several guide components (17) are provided on both sides of the top end of the buffer plate (16).

2. The lightweight battery pack casing with distributed reinforcing ribs according to claim 1, characterized in that: The top two sides of the support frame one (5) are provided with slots (13), and the bottom two sides of the support frame two (6) are provided with clips (14). The clips (14) are engaged with the slots (13). The surface of the support frame one (5) is provided with several connecting holes one (10) that are inserted and connected to the connecting bolts. The surface of the support frame two (6) is provided with several connecting holes two (11) that are inserted and connected to the connecting bolts. The connecting holes two (11) are coaxial with the connecting holes one (10).

3. The lightweight battery pack casing with distributed reinforcing ribs according to claim 1, characterized in that: The vibration damping component (9) includes a stacked rubber block (901), which is made of soft and hard rubber stacked and pressed together. A spring steel sheet is fixed inside the stacked rubber block (901). A pad one (902) is fixed at the bottom end of the stacked rubber block (901), and a pad two (903) is fixed at the top end of the stacked rubber block (901).

4. The lightweight battery pack casing with distributed reinforcing ribs according to claim 3, characterized in that: The surface of the support frame 1 (5) is provided with several mounting holes 1 (7) for mounting thereon. The bottom end of the support frame 1 (5) is provided with an enlarged groove (12) communicating with the mounting holes 1 (7). The pad 2 (903) is engaged with the inside of the enlarged groove (12). The surface of the support frame 2 (6) is provided with several mounting holes 2 (8). The middle part of the stacked rubber block (901), the middle part of the pad 1 (902) and the middle part of the pad 2 (903) are all provided with concentric holes (904). The mounting holes 1 (7) and the mounting holes 2 (8) are coaxial with the concentric holes (904).

5. The lightweight battery pack casing with distributed reinforcing ribs according to claim 1, characterized in that: The bottom end of the first support frame (5) and the top end of the second support frame (6) are each fixed with a number of reinforcing ribs (15) to strengthen the space between the lower shell (1) and the upper shell (2).

6. The lightweight battery pack casing with distributed reinforcing ribs according to claim 1, characterized in that: The guide assembly (17) includes a guide sleeve (1701), the bottom end of which is fixedly connected to the top end of the buffer plate (16). The top end of the guide sleeve (1701) is provided with a groove, and a damping rubber ring (1702) is embedded in the top of the groove. A guide post (1703) is slidably connected to the groove, and the top end of the guide post (1703) is fixedly connected to the bottom end of the lower housing (1).

7. The lightweight battery pack casing with distributed reinforcing ribs according to claim 6, characterized in that: The bottom end of the guide post (1703) is fixedly provided with a limiting block (1704), and the limiting block (1704) is slidably connected to the inner wall of the guide sleeve (1701).

8. The lightweight battery pack casing with distributed reinforcing ribs according to claim 1, characterized in that: The buffer rubber pad (18) has several deformation grooves (19) inside. Both sides of the buffer rubber pad (18) have adhesive grooves (20) that communicate with the deformation grooves (19). A rubber plug (21) is bonded inside the adhesive groove (20). A vent hole (22) is opened on the surface of the rubber plug (21).

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