Hybrid lithium battery pack protection plate with multiple protection mechanisms

Abstract

The invention relates to the technical field of lithium batteries, in particular to a hybrid lithium battery pack protection plate with multiple protection mechanisms, and solves the problem that an effective damping protection effect cannot be provided when a lithium battery is impacted by external force due to the fact that a protection plate in the prior art only pays attention to electrical protection but does not pay attention to damping performance. And once the lithium battery is influenced by external force, the lithium battery is easy to damage, and spontaneous combustion risk is further caused. A hybrid lithium battery pack protection plate with multiple protection mechanisms comprises a battery mounting box and a protection shell, the protection shell is movably arranged outside the battery mounting box in a sleeving mode, and the two ends of the protection shell are detachably connected with end plates. The external impact force can be effectively absorbed and relieved, the risk that the lithium battery is damaged due to external force impact is reduced, the fire extinguishing agent can be rapidly released when the lithium battery is subjected to thermal runaway or damage, flame retardance is effectively achieved, and fire spreading is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium batteries, and in particular to a hybrid lithium battery pack protection board with multiple protection mechanisms. Background Art

[0002] Hybrid lithium batteries are batteries that combine lithium battery cells of different types, capacities or characteristics to form a battery pack or battery pack to meet specific energy needs or application scenarios. This hybrid method can fully utilize the advantages of various lithium batteries to optimize energy density, power output and cost-effectiveness. However, hybrid lithium batteries also face many challenges, such as inconsistency between battery cells, thermal management problems and the complexity of safety protection, which may have an adverse effect on the overall performance and safety of the battery pack.

[0003] Therefore, lithium battery protection boards occupy an important position in the field of lithium battery safety protection. As a key link in the lithium battery system, its protection performance has a decisive impact on the overall safety and service life of lithium batteries. Especially in the core link of shock absorption protection and fire source flame retardancy, the existing lithium battery protection board technology has gradually exposed a series of obvious limitations and technical problems when dealing with external force impact and fire hazards. Specifically, the existing lithium battery protection boards face prominent problems such as inconvenient operation, low efficiency and unstable protection effect in shock absorption protection. These protection boards often only focus on electrical protection, but not shock absorption, resulting in the inability of lithium batteries to provide effective shock absorption protection when they are impacted by external forces. Once a lithium battery is affected by external forces, it is easy to break, which in turn causes the risk of spontaneous combustion. What is more serious is that the existing protection board cannot immediately perform fire source flame retardancy when the lithium battery spontaneously ignites, which not only significantly increases the safety risk of lithium battery use, but also may pose a potential threat to the overall quality and reliability of the lithium battery system.

[0004] Therefore, in view of the many deficiencies in the existing technology, we urgently need a hybrid lithium battery pack protection board with multiple protection mechanisms to solve these problems. This new type of protection board should be able to significantly improve the shock absorption protection and fire retardant capabilities of lithium batteries, while better meeting the high requirements of modern lithium battery systems for safety and reliability, and provide strong support for the sustainable development of the lithium battery industry. Summary of the invention

[0005] The purpose of the present invention is to provide a hybrid lithium battery pack protection plate with multiple protection mechanisms, which solves the outstanding problems of the existing lithium battery protection plates in the prior art in terms of shock absorption protection, such as inconvenient operation, low efficiency and unstable protection effect. These protection plates often only focus on electrical protection, but not shock absorption, resulting in the inability of lithium batteries to provide effective shock absorption protection when impacted by external forces. Once a lithium battery is affected by external forces, it is easy to be damaged, which in turn causes the risk of spontaneous combustion. What is more serious is that the existing protection plates are unable to retard the fire source in the first time when the lithium battery spontaneously ignites, which not only significantly increases the safety risk of using lithium batteries, but also may pose a potential threat to the overall quality and reliability of the lithium battery system.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A hybrid lithium battery pack protection board with multiple protection mechanisms, comprising a battery installation box and a protective shell, wherein the protective shell is movably sleeved on the outside of the battery installation box, and both ends of the protective shell are detachably connected with end plates, and both sides of the battery installation box are provided with battery installation chambers, and the interiors of the two battery installation chambers are connected with a plurality of lithium batteries, and the lithium batteries include ternary lithium batteries and lithium iron phosphate batteries;

[0008] A protective mechanism is provided on one side of the two battery installation chambers close to the protective shell;

[0009] The protection mechanism comprises an inner plate connected to the inner wall of the battery installation chamber and a closing plate arranged on the top of the inner plate, and a plurality of protection components are arranged between the inner plate and the closing plate;

[0010] A buffer sealing structure is provided at the top edge of the battery installation box, the bottom of the buffer sealing structure is connected to the side wall of the battery installation box, and the top is connected to the bottom of the closing plate, and the four corners of the top of the inner plate are elastically connected to the bottom of the closing plate through elastic members;

[0011] The top of the inner plate is provided with a plurality of limiting circular grooves, and the protection assembly includes a fire extinguishing ball, a supporting ring plate and a contact plate;

[0012] The bottom of the fire extinguishing ball is arranged inside the adjacent limiting circular groove, the supporting ring plate is arranged on the top of the fire extinguishing ball, the contact plate is arranged on the top of the supporting ring plate and the bottom of the contact plate is provided with a mounting ring plate connected to the top of the supporting ring plate, a moving column is vertically arranged at the inner center of the mounting ring plate, and supporting structures are arranged on both sides between the contact plate and the mounting ring plate, an outer ring of the moving column is provided with an external thread, the top end of the moving column is rotatably connected to the bottom of the contact plate, and a spike is connected to the bottom end, arc-shaped protrusions matching the external thread are connected to both sides of the inner part of the mounting ring plate, the bottom of the supporting ring plate is connected to the top of the inner plate through a plurality of supporting rods, the fire extinguishing ball is made of plastic material, and a accommodating chamber is provided inside the fire extinguishing ball, and the interior of the accommodating chamber is filled with fire extinguishing agent.

[0013] Preferably, the supporting structure comprises a triangular plate, one end of which is fixedly connected to the bottom of the contact plate, and the other end of which is fixedly connected to the top of the mounting ring plate.

[0014] Preferably, the triangular plate and the arc-shaped protrusion are both made of metal material, the size of the arc-shaped protrusion on one side close to the moving column is smaller than the size on the other side, the arc-shaped protrusion is tapered as a whole, and an arc edge is provided at the end.

[0015] Preferably, a limiting ring adapted to the top of the fire extinguishing ball is provided at the bottom of the supporting ring plate, and the top of the limiting ring is connected to the bottom of the supporting ring plate through a plurality of connecting rods.

[0016] Preferably, a plurality of expansion grooves are provided on the top of the inner plate, a plurality of guide grooves are provided on the outer ring of the expansion groove, and the plurality of guide grooves extend to the inside of adjacent limiting circular grooves respectively.

[0017] Preferably, a partition plate is provided between the inner plate and the closing plate, a plurality of mounting openings adapted to the supporting ring plate are provided on the top of the partition plate, and the outer ring of the supporting ring plate is fixedly connected to the inner ring of the mounting opening by bolts.

[0018] Preferably, the buffer sealing structure includes a buffer strip made of rubber material, the top of the buffer strip is connected to the bottom of the closing plate, the bottom is connected to the top of the battery mounting box, the elastic member includes an extrusion spring, one end of the extrusion spring is elastically connected to the bottom of the closing plate, and the other end is elastically connected to the top of the internal plate, the bottom of the closing plate is connected to a tapered plate, the dimension of the tapered plate close to one side of the closing plate is larger than the dimension of the other side, and the side wall of the closing plate fits with the top of the inner wall of the battery mounting box.

[0019] Preferably, a plurality of plug-in slots are provided on both sides of the battery mounting box, a plurality of plug-in plates matching the plug-in slots are fixedly connected to the inner wall of the protective shell, a plurality of mounting holes are provided on both sides of the end plate, and a plurality of heat dissipation holes are provided at both ends of the battery mounting box and on the side walls of the two end plates.

[0020] The present invention has at least the following beneficial effects:

[0021] The hybrid lithium battery pack protection plate of the present invention significantly improves the safety and stability of the lithium battery pack through its unique multiple shock-absorbing design, innovative protective components, stable support structure, and optimized connection and heat dissipation settings. It can not only effectively absorb and alleviate external impact forces, reduce the risk of lithium batteries being damaged by external impacts, but also quickly release fire extinguishing agents when thermal runaway or damage occurs in lithium batteries, effectively retardant and prevent the spread of fire. At the same time, the protection plate is also easy to install, disassemble and maintain, effectively solving the problems of insufficient stability, insufficient seismic resistance, inconvenient maintenance and poor heat dissipation performance that may exist in the original technical solution, and provides more comprehensive protection for the application of lithium battery packs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the protective housing structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the battery installation box structure of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of the protection component of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of the buffer strip of the present invention;

[0028] Figure 6 It is a schematic diagram of the structure of the guide groove of the present invention;

[0029] Figure 7 It is a schematic diagram of the structure of the fire extinguishing ball of the present invention;

[0030] Figure 8 This is a schematic diagram of the supporting ring plate structure of the present invention;

[0031] Fig. 9 It is a schematic diagram of the structure of the movable column of the present invention.

[0032] In the figure: 1. Protective shell; 2. End plate; 3. Battery installation box; 4. Closing plate; 5. Plug slot; 6. Plug plate; 7. Lithium battery; 8. Heat dissipation hole; 9. Mounting hole; 10. Internal plate; 11. Protective component; 12. Extrusion spring; 13. Buffer strip; 14. Taper plate; 15. Limiting circular groove; 16. Guide groove; 17. Expansion groove; 18. Fire extinguishing ball; 19. Partition plate; 20. Limiting ring; 21. Supporting ring plate; 22. Contact plate; 23. Mounting ring plate; 24. Triangular plate; 25. Arc protrusion; 26. Moving column; 27. External thread; 28. Spike; 29. ​​Support rod; 30. Connecting rod. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0034] Embodiment 1, refer to Figure 1-9 A hybrid lithium battery pack protection board with multiple protection mechanisms includes a battery mounting box 3 and a protective shell 1, the protective shell 1 is movably mounted on the outside of the battery mounting box 3, and both ends of the protective shell 1 are detachably connected with end plates 2, both sides of the battery mounting box 3 are provided with battery mounting chambers, and the interiors of the two battery mounting chambers are connected with a plurality of lithium batteries 7, and the lithium batteries 7 include ternary lithium batteries and lithium iron phosphate batteries;

[0035] A protective mechanism is provided on one side of the two battery installation chambers close to the protective housing 1;

[0036] The protection mechanism includes an inner plate 10 connected to the inner wall of the battery installation chamber and a closing plate 4 arranged on the top of the inner plate 10, and a plurality of protection components 11 are arranged between the inner plate 10 and the closing plate 4;

[0037] A buffer sealing structure is provided at the top edge of the battery mounting box 3, the bottom of the buffer sealing structure is connected to the side wall of the battery mounting box 3, the top is connected to the bottom of the closing plate 4, and the top four corners of the inner plate 10 are elastically connected to the bottom of the closing plate 4 through elastic members;

[0038] A plurality of limiting circular grooves 15 are provided on the top of the inner plate 10, and the protection assembly 11 includes a fire extinguishing ball 18, a supporting ring plate 21 and a contact plate 22;

[0039] The bottom of the fire extinguishing ball 18 is arranged inside the adjacent limiting circular groove 15, the supporting ring plate 21 is arranged on the top of the fire extinguishing ball 18, the contact plate 22 is arranged on the top of the supporting ring plate 21 and the bottom of the contact plate 22 is provided with a mounting ring plate 23 connected to the top of the supporting ring plate 21, a moving column 26 is vertically arranged at the inner center of the mounting ring plate 23, and supporting structures are arranged on both sides between the contact plate 22 and the mounting ring plate 23, the outer ring of the moving column 26 is provided with an external thread 27, the top end of the moving column 26 is rotatably connected to the bottom of the contact plate 22, and the bottom end is connected with a spike 28, and both sides of the inner part of the mounting ring plate 23 are connected with arc-shaped protrusions 25 adapted to the external thread 27, the bottom of the supporting ring plate 21 is connected to the top of the inner plate 10 through a plurality of support rods 29, the fire extinguishing ball 18 is made of plastic material, and a accommodating chamber is arranged inside the fire extinguishing ball 18, and the interior of the accommodating chamber is filled with fire extinguishing agent.

[0040] This program has the following working process:

[0041] When the hybrid lithium battery pack protection board of the present invention is working, the protective shell 1 is movably mounted on the outside of the battery installation box 3 to provide preliminary external protection. Battery installation chambers are provided on both sides of the battery installation box 3, and a plurality of lithium batteries 7 are installed inside, including ternary lithium batteries and lithium iron phosphate batteries, so as to realize the assembly of hybrid lithium batteries.

[0042] Each battery installation chamber is provided with a protection mechanism on one side close to the protective shell 1, which is mainly composed of an internal plate 10 and a closing plate 4, between which a number of protection components 11 are arranged. The protection component 11 specifically includes a fire extinguishing ball 18, a supporting ring plate 21 and a contact plate 22. The bottom of the fire extinguishing ball 18 is placed in a limiting circular groove 15 opened on the internal plate 10, the supporting ring plate 21 is located at the top of the fire extinguishing ball 18, and is connected to the internal plate 10 through a support rod 29, while the contact plate 22 is arranged on the top of the supporting ring plate 21 and is connected to the supporting ring plate 21 through a mounting ring plate 23. The top end of the movable column 26 is rotatably connected to the bottom of the contact plate 22, and a spike 28 is connected to the bottom end. Both sides of the interior of the mounting ring plate 23 are connected to arc-shaped protrusions 25 that are compatible with the external thread 27. Such a design forms a structure similar to a hand-pushed rotating bamboo dragonfly between the movable column 26 and the mounting ring plate 23.

[0043] Under normal circumstances, the protective component 11 maintains a stable state. However, once an external force impact occurs, the protective mechanism will be triggered. In particular, when the lithium battery 7 is damaged and may cause spontaneous combustion, the fire extinguishing ball 18 is made of plastic material and filled with fire extinguishing agent. It can quickly break and release the fire extinguishing agent when it comes into contact with high temperature or flame, thereby effectively preventing flames. At the same time, the buffer sealing structure set on the top edge of the battery mounting box 3 can provide additional shock absorbing effect when it is impacted by external force, protecting the lithium battery 7 from damage. The elastic connection between the internal plate 10 and the closing plate 4 also further enhances the overall shock absorbing performance.

[0044] When the impact force is small, the buffer sealing structure and the elastic member can buffer and decompose the impact force. When the impact force is large, the closing plate 4 will quickly transition to the position of the inner plate 10, squeezing the contact plate 22 and causing the support structure to break. Once the support structure breaks, the contact plate 22 will move to the position of the mounting ring plate 23, and the moving column 26 will rotate and move through the external thread 27 and the two arc-shaped protrusions 25 to alleviate the impact force again. When the spike 28 contacts the fire extinguishing ball 18, it will puncture the fire extinguishing ball 18 to allow the fire extinguishing agent inside to flow out, thereby providing early flame retardancy before the lithium battery 7 spontaneously ignites.

[0045] According to the above working process, we can know that:

[0046] Significantly improve shock absorption and protection capabilities: Multiple shock absorption effects are achieved through the buffer sealing structure at the top of the battery installation box 3 and the elastic connection between the internal plate 10 and the closing plate 4, combined with the hand-pushed rotating bamboo dragonfly structure between the moving column 26 and the mounting ring plate 23. This can not only effectively absorb external impact force, but also further alleviate the impact force through the rotation of the moving column 26 when the impact force is large, significantly reducing the risk of damage to the lithium battery 7 due to external impact.

[0047] Enhanced fire retardancy: The innovative design of the protective component 11, especially the combination of the fire extinguishing ball 18 and the spikes 28 of the mobile column 26, enables the fire extinguishing ball 18 to be quickly punctured to release the fire extinguishing agent when the lithium battery 7 is thermally runaway or damaged, effectively retardant and prevent the fire from spreading. This greatly improves the safety of the lithium battery pack and reduces the risk of spontaneous combustion.

[0048] Example 2, refer to Figure 1-9The supporting structure includes a triangular plate 24, one end of which is fixedly connected to the bottom of the contact plate 22, and the other end is fixedly connected to the top of the mounting ring plate 23. Through the arrangement of the triangular plate 24, the contact plate 22 and the mounting ring plate 23, a stable supporting structure is formed in the protection component 11. When impacted by external force, the triangular plate 24 can effectively disperse and withstand the impact force, protecting the contact plate 22 and the mounting ring plate 23 from being damaged due to direct force, thereby maintaining the overall stability and protection effect of the protection component 11.

[0049] The triangular plate 24 and the arc-shaped protrusion 25 are both made of metal. The size of the arc-shaped protrusion 25 near the moving column 26 is smaller than the size of the other side. The whole is tapered, and the end is provided with an arc edge. The arrangement of the triangular plate 24 and the arc-shaped protrusion 25 made of metal enhances the strength and stability of the connection between the supporting structure and the moving column 26 and the mounting ring plate 23. At the same time, the tapered design and arc edge arrangement of the arc-shaped protrusion 25 enable the moving column 26 to rotate more smoothly, reduce friction and resistance, and improve the efficiency of impact force relief.

[0050] The bottom of the supporting ring plate 21 is provided with a limit ring 20 adapted to the top of the fire extinguishing ball 18. The top of the limit ring 20 is connected to the bottom of the supporting ring plate 21 through a plurality of connecting rods 30. The position of the fire extinguishing ball 18 is further fixed by the adaptation of the limit ring 20 to the top of the fire extinguishing ball 18 and the connection of the connecting rod 30 to the supporting ring plate 21 to prevent it from moving or falling off when it is not necessary. This ensures that the fire extinguishing ball 18 can respond quickly at critical moments, effectively retards flames, and improves the safety of the lithium battery pack.

[0051] A plurality of expansion grooves 17 are provided on the top of the inner plate 10, and a plurality of guide grooves 16 are provided on the outer ring of the expansion grooves 17. The plurality of guide grooves 16 extend to the inside of the adjacent limiting circular grooves 15, respectively. By providing the expansion grooves 17 and the guide grooves 16, an effective guide and expansion structure is formed on the top of the inner plate 10. This enables the fire extinguishing agent released by the fire extinguishing ball 18 to quickly diffuse into the expansion groove 17 through the guide grooves 16 when the lithium battery 7 is damaged and may cause spontaneous combustion, and further cover the lithium battery 7, thereby improving the flame retardant effect and fire extinguishing efficiency.

[0052] A partition plate 19 is provided between the inner plate 10 and the closing plate 4. The top of the partition plate 19 is provided with a plurality of mounting openings adapted to the supporting ring plate 21. The outer ring of the supporting ring plate 21 is fixedly connected with the inner ring of the mounting openings by bolts. The provision of the partition plate 19 and its bolted connection with the supporting ring plate 21 further enhance the stability and firmness of the protection assembly 11. The partition plate 19 not only serves as a partition and a support, but also provides a stable fixing point for the supporting ring plate 21 through the mounting openings thereon, so that the entire protection assembly 11 can more stably protect the lithium battery 7 when subjected to external force impact.

[0053] According to the above embodiments, it can be seen that the design of the support structure has been further optimized and enhanced. Specifically, one end of the triangular plate 24 is fixedly connected to the bottom of the contact plate 22, and the other end is fixedly connected to the top of the mounting ring plate 23, so that a stable support structure is formed in the protective component 11. At the same time, the triangular plate 24 and the arc-shaped protrusion 25 are both made of metal material, wherein the size of the arc-shaped protrusion 25 close to the moving column 26 is smaller than the size of the other side, and the whole is conical, and the end is provided with an arc edge. Such a design not only enhances the strength and stability of the connection between the support structure and the moving column 26 and the mounting ring plate 23, but also makes the moving column 26 smoother when rotating and moving, reducing friction and resistance. In addition, a limiting ring 20 adapted to the top of the fire extinguishing ball 18 is provided at the bottom of the supporting ring plate 21, and the top of the limiting ring 20 is connected to the bottom of the supporting ring plate 21 through a number of connecting rods 30. Such a design further fixes the position of the fire extinguishing ball 18 to prevent it from moving or falling off when it is not necessary. Several expansion grooves 17 are provided on the top of the inner plate 10, and several guide grooves 16 are provided on the outer ring of the expansion grooves 17. These guide grooves 16 extend to the inside of the adjacent limiting circular grooves 15, respectively, thereby forming an effective guide and expansion structure on the top of the inner plate 10. Finally, a partition plate 19 is provided between the inner plate 10 and the closing plate 4, and several installation openings adapted to the supporting ring plate 21 are provided on the top of the partition plate 19. The outer ring of the supporting ring plate 21 is fixedly connected with the inner ring of the installation opening by bolts. Such a design further enhances the stability and firmness of the protective assembly 11.

[0054] The above design brings significant beneficial effects: First, through the arrangement of the triangular plate 24, the contact plate 22 and the mounting ring plate 23, a stable support structure is formed. When subjected to external force impact, the triangular plate 24 can effectively disperse and withstand the impact force, thereby protecting the contact plate 22 and the mounting ring plate 23 from damage due to direct force, and maintaining the overall stability and protective effect of the protective component 11. Secondly, the arrangement of the triangular plate 24 and the arc-shaped protrusion 25 made of metal material enhances the strength and stability of the connection between the support structure and the moving column 26 and the mounting ring plate 23. At the same time, the conical design and arc edge arrangement of the arc-shaped protrusion 25 make the moving column 26 smoother when rotating and moving, reducing friction and resistance, and improving the efficiency of impact force relief. Furthermore, the adaption setting of the limit ring 20 and the top of the fire extinguishing ball 18 and the connection between the connecting rod 30 and the supporting ring plate 21 further fix the position of the fire extinguishing ball 18 to prevent it from moving or falling off when it is not necessary, which ensures that the fire extinguishing ball 18 can respond quickly at critical moments, effectively retardant, and improve the safety of the lithium battery pack. In addition, the setting of the expansion groove 17 and the guide groove 16 allows the fire extinguishing agent released by the fire extinguishing ball 18 to quickly diffuse into the expansion groove 17 through the guide groove 16 when the lithium battery 7 is damaged and may cause spontaneous combustion, and further cover the lithium battery 7, thereby improving the flame retardant effect and fire extinguishing efficiency. Finally, the setting of the partition plate 19 and its bolted connection with the supporting ring plate 21 further enhance the stability and firmness of the protective assembly 11, so that the entire protective assembly 11 can more firmly protect the lithium battery 7 when it is impacted by external forces, solving the problems of insufficient stability and low fire extinguishing efficiency that may exist in the original technical solution.

[0055] Example 3, refer to Figure 1-9 The buffer sealing structure includes a buffer strip 13 made of rubber material, the top of the buffer strip 13 is connected to the bottom of the closing plate 4, and the bottom is connected to the top of the battery installation box 3. The elastic member includes an extrusion spring 12, one end of the extrusion spring 12 is elastically connected to the bottom of the closing plate 4, and the other end is elastically connected to the top of the internal plate 10. The bottom of the closing plate 4 is connected to a tapered plate 14, and the size of the tapered plate 14 close to the closing plate 4 is larger than the size of the other side. The side wall of the closing plate 4 fits with the top of the inner wall of the battery installation box 3. Through the arrangement of the buffer strip 13, the extrusion spring 12 and the tapered plate 14, a multiple shock absorption and buffer structure is formed. When impacted by external force, these structures can effectively absorb and disperse the impact force to protect the lithium battery 7 from damage. At the same time, the fitting arrangement of the closing plate 4 and the top of the inner wall of the battery installation box 3 also further enhances the overall sealing and protection effect.

[0056] A plurality of plug-in slots 5 are provided on both sides of the battery mounting box 3, a plurality of plug-in plates 6 matching the plug-in slots 5 are fixedly connected to the inner wall of the protective shell 1, a plurality of mounting holes 9 are provided on both sides of the end plate 2, and a plurality of heat dissipation holes 8 are provided on both ends of the battery mounting box 3 and the side walls of the two end plates 2. Through the plug-in cooperation between the plug-in slots 5 and the plug-in plates 6, and the setting of the heat dissipation holes 8, not only a stable connection between the protective shell 1 and the battery mounting box 3 is achieved, but also the heat dissipation performance of the lithium battery pack is improved. The plug-in structure enables the protective shell 1 to be easily installed and disassembled, and is convenient for the maintenance and replacement of the lithium battery pack. The setting of the heat dissipation holes 8 effectively promotes the heat dissipation of the lithium battery pack during operation, and reduces the safety risks caused by overheating of the lithium battery.

[0057] According to the above embodiments, it can be known that the design of the buffer sealing structure has been further optimized and enhanced. Specifically, the buffer sealing structure includes a buffer strip 13 made of rubber material, the top of the buffer strip 13 is connected to the bottom of the closing plate 4, and the bottom is connected to the top of the battery mounting box 3. At the same time, the elastic member includes an extrusion spring 12, one end of the extrusion spring 12 is elastically connected to the bottom of the closing plate 4, and the other end is elastically connected to the top of the internal plate 10. In addition, a tapered plate 14 is also connected to the bottom of the closing plate 4, and the size of the tapered plate 14 close to one side of the closing plate 4 is larger than the size of the other side. Such a design enables the impact force to be effectively absorbed and dispersed when impacted by external force. In addition, the side wall of the closing plate 4 is also in contact with the top of the inner wall of the battery mounting box 3, and such a setting further enhances the overall sealing and protection effect. On both sides of the battery installation box 3, there are also several plug-in slots 5, and the inner wall of the protective shell 1 is fixedly connected with several plug-in plates 6 that are compatible with the plug-in slots 5. Such plug-in matching not only realizes the stable connection between the protective shell 1 and the battery installation box 3, but also facilitates the installation and removal of the protective shell 1. At the same time, the two ends of the battery installation box 3 and the side walls of the two end plates 2 are also provided with a number of heat dissipation holes 8. Such a setting improves the heat dissipation performance of the lithium battery pack and reduces the safety risks caused by overheating of the lithium battery. The above design brings significant beneficial effects. First, through the setting of the buffer strip 13, the extrusion spring 12 and the tapered plate 14, a multiple shock absorption and buffer structure is formed. When impacted by external force, these structures can effectively absorb and disperse the impact force, protect the lithium battery 7 from damage, and solve the problem of insufficient seismic resistance that may exist in the original technical solution. Secondly, the fitting setting of the closing plate 4 and the top of the inner wall of the battery installation box 3 also further enhances the overall sealing and protection effect, and improves the safety and stability of the lithium battery pack. Furthermore, the plug-in cooperation between the plug slot 5 and the plug board 6 not only realizes a stable connection between the protective housing 1 and the battery installation box 3, but also facilitates the installation and removal of the protective housing 1, and facilitates the maintenance and replacement of the lithium battery pack, solving the maintenance inconvenience problem that may exist in the original technical solution. Finally, the setting of the heat dissipation hole 8 effectively promotes the heat dissipation of the lithium battery pack during operation, reduces the safety risk caused by overheating of the lithium battery, and improves the service life and safety of the lithium battery pack.

[0058] In summary: The hybrid lithium battery pack protection board of the present invention integrates multiple protection mechanisms to provide comprehensive protection for the lithium battery pack. Specifically, the protective shell 1 is movably mounted on the outside of the battery mounting box 3, and a stable connection is achieved through the plug-in cooperation between the plug-in slot 5 and the plug-in board 6, which also facilitates the installation and disassembly of the protective shell 1 and the maintenance and replacement of the lithium battery pack. Battery installation chambers are provided on both sides of the battery mounting box 3, and a number of lithium batteries 7 are installed inside, including ternary lithium batteries and lithium iron phosphate batteries, thereby realizing the assembly of hybrid lithium batteries.

[0059] Each battery installation chamber is provided with a protection mechanism on one side close to the protective shell 1, which is mainly composed of an internal plate 10 and a closed plate 4, between which a number of protection components 11 are arranged. The protection component 11 specifically includes a fire extinguishing ball 18, a supporting ring plate 21 and a contact plate 22. The bottom of the fire extinguishing ball 18 is placed in a limiting circular groove 15 opened on the internal plate 10, and is connected to the supporting ring plate 21 through a limiting ring 20 and a connecting rod 30, and the supporting ring plate 21 is connected to the internal plate 10 through a support rod 29. The contact plate 22 is arranged on the top of the supporting ring plate 21 and is connected to the supporting ring plate 21 through a mounting ring plate 23. The top end of the movable column 26 is rotatably connected to the bottom of the contact plate 22, and a spike 28 is connected to the bottom end, and arc-shaped protrusions 25 matching the external thread 27 are connected to both sides of the inner side of the mounting ring plate 23. Under normal circumstances, the protection component 11 remains stable. However, once an external force impact occurs, the protection mechanism will be triggered. In particular, when the lithium battery 7 is damaged and may cause spontaneous combustion, the fire extinguishing ball 18 can quickly rupture and release the fire extinguishing agent when it comes into contact with high temperature or flame, thereby effectively preventing fire.

[0060] At the same time, the buffer seal structure provided at the top edge of the battery mounting box 3 includes a buffer strip 13, an extrusion spring 12 and a tapered plate 14, which can provide additional shock absorbing effect and protect the lithium battery 7 from damage when impacted by external force. The elastic connection between the inner plate 10 and the closing plate 4 also further enhances the overall shock absorbing performance. When the impact force is small, the buffer seal structure and the elastic member can achieve the buffering and decomposition of the impact force. When the impact force is large, the closing plate 4 will quickly transition to the position of the inner plate 10, causing the contact plate 22 to be squeezed, resulting in the fracture of the triangular plate 24. The contact plate 22 will move to the position of the mounting ring plate 23, and the moving column 26 will rotate and move through the external thread 27 and the two arc-shaped protrusions 25, and the impact force will be alleviated again. When the spike 28 contacts the fire extinguishing ball 18, it will pierce the fire extinguishing ball 18 to make the fire extinguishing agent inside flow out, and perform flame retardant in advance before the lithium battery 7 spontaneously ignites.

[0061] In addition, a plurality of heat dissipation holes 8 are provided at both ends of the battery mounting box 3 and the side walls of the two end plates 2. Such a configuration improves the heat dissipation performance of the lithium battery pack and reduces the safety risk caused by overheating of the lithium battery.

[0062] Beneficial effects: First, multiple shock absorption effects are achieved through the buffer sealing structure at the top of the battery mounting box 3 and the elastic connection between the inner plate 10 and the closing plate 4, combined with the hand-pushed rotating bamboo dragonfly structure between the moving column 26 and the mounting ring plate 23. This can not only effectively absorb external impact force, but also further alleviate the impact force through the rotation of the moving column 26 when the impact force is large, significantly reducing the risk of damage to the lithium battery 7 due to external impact.

[0063] Secondly, the innovative design of the protection component 11, especially the combination of the fire extinguishing ball 18 and the spikes 28 of the mobile column 26, enables the fire extinguishing ball 18 to be quickly punctured to release the fire extinguishing agent when the lithium battery 7 is thermally runaway or damaged, effectively preventing the fire from spreading. This greatly improves the safety of the lithium battery pack and reduces the risk of spontaneous combustion.

[0064] Furthermore, the arrangement of the triangular plate 24, the contact plate 22 and the mounting ring plate 23 forms a stable support structure. When subjected to external force impact, the triangular plate 24 can effectively disperse and withstand the impact force, protecting the contact plate 22 and the mounting ring plate 23 from damage due to direct force, and maintaining the overall stability and protection effect of the protection component 11. At the same time, the triangular plate 24 and the arc-shaped protrusion 25 made of metal material enhance the strength and stability of the connection between the support structure and the moving column 26 and the mounting ring plate 23. The conical design and arc edge arrangement of the arc-shaped protrusion 25 make the moving column 26 smoother when rotating and moving, reducing friction and resistance, and improving the efficiency of impact force relief.

[0065] In addition, the matching setting of the limit ring 20 and the top of the fire extinguishing ball 18 and the connection between the connecting rod 30 and the supporting ring plate 21 further fix the position of the fire extinguishing ball 18 to prevent it from moving or falling off when it is not necessary, which ensures that the fire extinguishing ball 18 can respond quickly at critical moments, effectively retardant, and improve the safety of the lithium battery pack. At the same time, the setting of the expansion groove 17 and the guide groove 16 allows the fire extinguishing agent released by the fire extinguishing ball 18 to quickly diffuse into the expansion groove 17 through the guide groove 16 when the lithium battery 7 is damaged and may cause spontaneous combustion, and further cover the lithium battery 7, thereby improving the flame retardant effect and fire extinguishing efficiency.

[0066] Finally, the plug-in cooperation between the plug slot 5 and the plug-in board 6 realizes a stable connection between the protective shell 1 and the battery installation box 3, and facilitates the installation and removal of the protective shell 1, which is convenient for the maintenance and replacement of the lithium battery pack. The setting of the heat dissipation hole 8 effectively promotes the heat dissipation of the lithium battery pack during operation, reduces the safety risks caused by overheating of the lithium battery, and improves the service life and safety of the lithium battery pack. At the same time, the fitting setting of the closing plate 4 and the top of the inner wall of the battery installation box 3 also further enhances the overall sealing and protection effect, improves the safety and stability of the lithium battery pack, and solves the problems of insufficient stability, insufficient earthquake resistance, inconvenient maintenance and poor heat dissipation performance that may exist in the original technical solution.

[0067] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A hybrid lithium battery pack protection board with multiple protection mechanisms, characterized in that: include: A battery installation box (3) and a protective shell (1), wherein the protective shell (1) is movably mounted on the outside of the battery installation box (3), and both ends of the protective shell (1) are detachably connected to end plates (2), and both sides of the battery installation box (3) are provided with battery installation chambers, and the interiors of the two battery installation chambers are connected to a plurality of lithium batteries (7), and the lithium batteries (7) include ternary lithium batteries and lithium iron phosphate batteries; A protective mechanism is provided on one side of the two battery installation chambers close to the protective housing (1); The protection mechanism comprises an inner plate (10) connected to the inner wall of the battery installation chamber and a closing plate (4) arranged on the top of the inner plate (10), and a plurality of protection components (11) are arranged between the inner plate (10) and the closing plate (4); A buffer sealing structure is provided at the top edge of the battery installation box (3); the bottom of the buffer sealing structure is connected to the side wall of the battery installation box (3), and the top is connected to the bottom of the closing plate (4); the top four corners of the inner plate (10) are elastically connected to the bottom of the closing plate (4) via elastic members; The top of the inner plate (10) is provided with a plurality of limiting circular grooves (15), and the protection component (11) includes a fire extinguishing ball (18), a supporting ring plate (21) and a contact plate (22); The bottom of the fire extinguishing ball (18) is arranged inside the adjacent limiting circular groove (15), the supporting ring plate (21) is arranged on the top of the fire extinguishing ball (18), the contact plate (22) is arranged on the top of the supporting ring plate (21), and the bottom of the contact plate (22) is provided with a mounting ring plate (23) connected to the top of the supporting ring plate (21), a moving column (26) is vertically arranged at the inner center of the mounting ring plate (23), and supporting structures are arranged on both sides between the contact plate (22) and the mounting ring plate (23), and the moving column (26) The outer ring is provided with an external thread (27), the top end of the movable column (26) is rotatably connected to the bottom of the contact plate (22), and the bottom end is connected with a spike (28), the inner sides of the mounting ring plate (23) are connected with arc-shaped protrusions (25) adapted to the external thread (27), the bottom of the supporting ring plate (21) is connected to the top of the inner plate (10) through a plurality of support rods (29), the fire extinguishing ball (18) is made of plastic material, and a containing chamber is provided inside the fire extinguishing ball (18), and the inside of the containing chamber is filled with fire extinguishing agent.

2. A hybrid lithium battery pack protection board with multiple protection mechanisms according to claim 1, characterized in that: The supporting structure comprises a triangular plate (24), one end of which is fixedly connected to the bottom of the contact plate (22), and the other end of which is fixedly connected to the top of the mounting ring plate (23).

3. A hybrid lithium battery pack protection board with multiple protection mechanisms according to claim 2, characterized in that: The triangular plate (24) and the arc-shaped protrusion (25) are both made of metal material. The size of the arc-shaped protrusion (25) on one side close to the moving column (26) is smaller than that on the other side. The arc-shaped protrusion (25) is tapered as a whole and has an arc edge at the end.

4. A hybrid lithium battery pack protection board with multiple protection mechanisms according to claim 3, characterized in that: A limiting ring (20) adapted to the top of the fire extinguishing ball (18) is provided at the bottom of the supporting ring plate (21), and the top of the limiting ring (20) is connected to the bottom of the supporting ring plate (21) via a plurality of connecting rods (30).

5. The hybrid lithium battery pack protection board with multiple protection mechanisms according to claim 1, characterized in that: The top of the inner plate (10) is provided with a plurality of expansion grooves (17), the outer ring of the expansion groove (17) is provided with a plurality of guide grooves (16), and the plurality of guide grooves (16) respectively extend to the inside of adjacent limiting circular grooves (15).

6. A hybrid lithium battery pack protection board with multiple protection mechanisms according to claim 1, characterized in that: A partition plate (19) is arranged between the inner plate (10) and the closing plate (4), and a plurality of mounting openings matching the supporting ring plate (21) are opened on the top of the partition plate (19), and the outer ring of the supporting ring plate (21) is fixedly connected with the inner ring of the mounting opening by bolts.

7. A hybrid lithium battery pack protection board with multiple protection mechanisms according to claim 1, characterized in that: The buffer sealing structure comprises a buffer strip (13) made of rubber material, the top of the buffer strip (13) is connected to the bottom of the closing plate (4), and the bottom is connected to the top of the battery installation box (3), the elastic member comprises an extrusion spring (12), one end of the extrusion spring (12) is elastically connected to the bottom of the closing plate (4), and the other end is elastically connected to the top of the internal plate (10), the bottom of the closing plate (4) is connected to a tapered plate (14), the size of the tapered plate (14) on one side close to the closing plate (4) is larger than the size on the other side, and the side wall of the closing plate (4) is in contact with the top of the inner wall of the battery installation box (3).

8. The hybrid lithium battery pack protection board with multiple protection mechanisms according to claim 1, characterized in that: A plurality of plug-in slots (5) are provided on both sides of the battery installation box (3); a plurality of plug-in plates (6) adapted to the plug-in slots (5) are fixedly connected to the inner wall of the protective housing (1); a plurality of mounting holes (9) are provided on both sides of the end plate (2); and a plurality of heat dissipation holes (8) are provided on both ends of the battery installation box (3) and the side walls of the two end plates (2).

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