Separating and explosion-proof composite material circular power battery cover
By designing multiple honeycomb shell structures and pressure relief systems on the power battery cover, the problem of poor explosion-proof effect in the prior art is solved, and the effect of effectively blocking explosion-flame and reducing battery cover damage is achieved.
Patent Information
- Application Number
- CN202422164474.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-04
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-09-04
AI Technical Summary
The existing power battery cover explosion-proof mechanism is poor when the explosion spreads, resulting in bulging of the battery cover and causing losses.
A composite circular power battery cover with explosion-proof barrier is designed, adopting multiple honeycomb shell structures and pressure relief systems. The honeycomb shell diverges the force through reinforcement ribs and fixing plates, and the pressure relief system discharges excess gas through the pressure relief chamber, pressure relief hole and pressure relief valve.
It effectively prevents the propagation of deflagration, reduces the area of deflagration, reduces damage to the battery cover, and avoids the battery cover bulge through the pressure relief system.
Smart Images
Figure CN223023490U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of new energy vehicles, and more specifically, the utility model relates to a circular power battery cover made of a composite material with explosion isolation and prevention functions. Background Art
[0002] A circular power battery cover is a component used to seal a circular power battery. It is usually made of high-strength and corrosion-resistant materials, which play a role in protecting the internal structure of the battery, preventing electrolyte leakage, and isolating the influence of the external environment on the battery. It plays a key role in ensuring the safe operation of the battery and also provides certain mechanical support for the battery.
[0003] The existing explosion-proof mechanism of the power battery cover conducts explosion prevention on the whole. The spread of the explosion will cause the explosion-proof mechanism to be ineffective or have very little effect. At the same time, a large amount of gas will be generated, causing the battery cover to bulge and resulting in losses. Summary of the Utility Model
[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a circular power battery cover made of a composite material with explosion isolation and prevention functions to solve the problems raised in the above background art.
[0005] To achieve the above object, the utility model provides the following technical solution: A circular power battery cover made of a composite material with explosion isolation and prevention functions, including a cover shell. A plurality of snap holes are provided on the surface of the cover shell. A reinforcing plate is fixedly arranged inside the cover shell. A sealing ring is fixedly arranged on the top of the reinforcing plate. Threaded holes are provided on both the sealing ring and the surface of the reinforcing plate. A force-relieving component is arranged inside the reinforcing plate;
[0006] The force-relieving component includes reinforcing ribs fixed to the reinforcing plate and the cover shell. A first fixing plate is fixedly arranged on one side of the reinforcing rib. A plurality of honeycomb shells are fixedly arranged inside the first fixing plate. The cross-sections of the plurality of honeycomb shells are all set to be hexagonal.
[0007] As a further description of the above technical solution:
[0008] A shock absorber is fixedly arranged inside the honeycomb shell. One end of the shock absorber is fixedly provided with a spliced sector plate, and positioning sliding holes are provided on the surface of the spliced sector plate.
[0009] As a further description of the above technical solution:
[0010] A slider is slidably arranged inside the positioning sliding hole. The cross-section of the slider is set to be cross-shaped. A combined plate is fixedly arranged on one side of the slider. Conductive wires are arranged inside the spliced sector plate.
[0011] As a further description of the above technical solution:
[0012] An electrode plate is fixedly provided at the bottom of the wire. The electrode plate is fixedly connected to the cover shell. A pressure relief cavity is arranged between the reinforcing plate and the first fixing plate. The surface of the reinforcing rib is provided with a first pressure relief hole.
[0013] As a further description of the above technical solution:
[0014] A plurality of second pressure relief holes are provided on the surfaces of the first fixing plate and the honeycomb shell. Two second fixing plates are fixedly arranged between the plurality of honeycomb shells.
[0015] As a further description of the above technical solution:
[0016] Third pressure relief holes are provided on the surfaces of the two second fixing plates. A pressure relief channel is fixedly arranged between the two second fixing plates.
[0017] As a further description of the above technical solution:
[0018] Auxiliary pressure relief holes are provided on the surface of the pressure relief channel. Fourth pressure relief holes are provided on the surface of the cover shell. A pressure relief valve is fixedly arranged outside the fourth pressure relief holes.
[0019] The technical effects and advantages of the present utility model:
[0020] 1. By setting a force unloading component, the expanded battery will squeeze the spliced sector plates to move backward, and the combined plate and the slider will continue to connect each spliced sector plate to keep it stable. During the backward movement of the spliced sector plates, the honeycomb shell will also be squeezed. Multiple combined honeycomb shells will squeeze each other, diverging the force to various parts. If the pressure inside the battery continues to increase, it will cause the battery to explode and burn. However, because multiple honeycomb shells separate the battery, the spread of the explosion and combustion is prevented, and the explosion and combustion are controlled within a single cell, reducing the explosion and combustion area, so that multiple honeycomb shells, the second fixing plate, the reinforcing rib and the reinforcing plate bear the force together. Compared with the prior art, this structure can continuously dissipate the continuously output force through deformation and the combination between structures by multiple honeycomb shells, the second fixing plate, the reinforcing rib and the reinforcing plate, reducing the damage to the whole.
[0021] 2. By setting a pressure relief cavity, pressure relief holes, a pressure relief channel and a pressure relief valve, the excessive gas generated by the expanded battery will flow through the first pressure relief hole and the second pressure relief hole to the pressure relief cavity, making the pressure relief cavity first filled with gas and reducing the pressure. The continuous gas will gather towards the middle after filling the pressure relief cavity, flow through the third pressure relief hole and the auxiliary pressure relief hole to the pressure relief pipeline and finally push open the pressure relief valve to lead to the outside, so as to ensure that the pressure inside the shell is consistent with the outside. Compared with the prior art, this structure first guides the continuously generated gas through the first pressure relief hole and the second pressure relief hole to the pressure relief cavity, making the pressure relief cavity act as a buffer area, so that the gas will not continuously squeeze in a small space to increase the internal pressure of the battery, and thus the battery cover will not bulge. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 This is a schematic diagram of the overall structure of the present utility model.
[0023] Figure 2 This is a schematic diagram of the structure of the force-releasing component of the present utility model.
[0024] Figure 3 This is a schematic diagram of the honeycomb shell, shock absorber, spliced fan-shaped plate, slider, composite plate, electrode plate and wire structure of the present utility model.
[0025] Figure 4 This is a schematic diagram of the first pressure relief hole and honeycomb shell structure of the present utility model.
[0026] Figure 5 This is a schematic diagram of the cover shell, reinforcing plate, sealing ring, reinforcing rib, first fixing plate, second pressure relief hole, third fixing plate, third pressure relief hole, pressure relief pipeline, auxiliary pressure relief hole, fourth pressure relief hole and pressure relief valve structure of the present utility model.
[0027] The reference numerals in the drawings are: 1, cover shell; 2, buckle hole; 3, reinforcing plate; 4, sealing ring; 5, threaded hole; 6, reinforcing rib; 7, first fixing plate; 8, honeycomb shell; 9, shock absorber; 10, spliced fan-shaped plate; 11, positioning sliding hole; 12, slider; 13, composite plate; 14, wire; 15, electrode piece; 16, pressure relief cavity; 17, first pressure relief hole; 18, second pressure relief hole; 19, second fixing plate; 20, third pressure relief hole; 21, pressure relief channel; 22, auxiliary pressure relief hole; 23, fourth pressure relief hole; 24, pressure relief valve. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0029] As shown in the attached Figures 1-5 A circular power battery cover made of a barrier explosion-proof composite material, including a cover shell 1, characterized in that: a plurality of buckle holes 2 are provided on the surface of the cover shell 1, a reinforcing plate 3 is fixedly provided inside the cover shell 1, a sealing ring 4 is fixedly provided on the top of the reinforcing plate 3, threaded holes 5 are provided on both the sealing ring 4 and the surface of the reinforcing plate 3, and a force-releasing component is provided inside the reinforcing plate 3;
[0030] The force-relieving component includes a reinforcing rib 6 fixed to the reinforcing plate 3 and the cover shell 1. On one side of the reinforcing rib 6, a first fixing plate 7 is fixedly provided. Inside the first fixing plate 7, a plurality of honeycomb shells 8 are fixedly provided. The cross-sections of the plurality of honeycomb shells 8 are all set to be hexagonal. The honeycomb shells 8 are set to have a hexagonal cross-section because the honeycomb structure has high strength and high stiffness while remaining lightweight.
[0031] In some embodiments, according to Figure 3 As shown, a shock absorber 9 is fixedly provided inside the honeycomb shell 8. One end of the shock absorber 9 is fixedly provided with a spliced sector plate 10, and a positioning slide hole 11 is formed on the surface of the spliced sector plate 10. The purpose of setting the shock absorber 9 and the spliced sector plate 10 is to contact the pressure in the first time and give a buffer space.
[0032] In some embodiments, according to Figure 3 As shown, a slider 12 is slidably provided inside the positioning slide hole 11. The cross-section of the slider 12 is set to be cross-shaped. One side of the slider 12 is fixedly provided with a combined plate 13, and a wire 14 is provided inside the spliced sector plate 10. The purpose of setting the combined plate 13 is to play the role of a connecting structure and maintain the structural rigidity when the spliced sector plate 10 is squeezed and moves backward.
[0033] In some embodiments, according to Figure 3 、 Figure 4 and Figure 5 As shown, an electrode plate 15 is fixedly provided at the bottom of the wire 14. The electrode plate 15 is fixedly connected to the cover shell 1. A pressure relief cavity 16 is provided between the reinforcing plate 3 and the first fixing plate 7, and a first pressure relief hole 17 is formed on the surface of the reinforcing rib 6. The purpose of setting the pressure relief cavity 16 is to provide a flow space for the gas so that the pressure inside the shell will not increase suddenly at one time, based on the buffer time.
[0034] In some embodiments, according to Figure Figure 5 As shown, a plurality of second pressure relief holes 18 are formed on the surfaces of the first fixing plate 7 and the honeycomb shell 8, and two second fixing plates 19 are fixedly provided between the plurality of honeycomb shells 8. The pressure relief holes are provided for guiding the gas.
[0035] In some embodiments, according to Figure Figure 5 As shown, third pressure relief holes 20 are formed on the surfaces of the two second fixing plates 19, and a pressure relief channel 21 is fixedly provided between the two second fixing plates 19. The purpose of setting the pressure relief channel 21 is to increase the gas pressure to open the pressure relief valve 24 after the pressure relief cavity 16 is filled with gas.
[0036] In some embodiments, according to Figure 5 As shown, auxiliary pressure relief holes 22 are formed on the surface of the pressure relief channel 21, a fourth pressure relief hole 23 is formed on the surface of the cover shell 1, and a pressure relief valve 24 is fixedly provided outside the fourth pressure relief hole 23. The purpose of setting the pressure relief valve 24 is to isolate / connect to the outside.
[0037] Working principle of the utility model: After the cylindrical lithium battery is correctly installed in the battery box by the staff, the utility model is connected to the battery box through the threaded holes 5 on the sealing ring 4 and the reinforcing plate 3 and the buckle holes 2 on the surface of the cover shell 1. At this time, one pole of the battery is connected to the wire 14 and the electrode plate 15, and the battery is located inside the multiple spliced sector plates 10. After the connection is completed, the battery operates normally. During use, the utility model plays a protective role. When the battery temperature is too high due to external factors and causes an explosion and combustion, the utility model plays an explosion-proof role.
[0038] During the process, excessive gas is generated inside the battery, causing the battery to expand. The expanded battery will squeeze the spliced sector plates 10 to move backward, while the combined plate 13 and the slider 12 continue to connect the various spliced sector plates 10 to maintain the rigidity of the overall structure. During the backward movement of the spliced sector plates 10, the shock absorber 9 will also be squeezed. When the shock absorber 9 is squeezed, it will squeeze the honeycomb shell 8. At this time, the multiple combined honeycomb shells 8 will squeeze each other, diverging the force to various parts to play a role in unloading the force. The expanded battery will generate excessive gas, and these gases will flow through the first pressure relief hole 17 and the second pressure relief hole 18 into the pressure relief cavity 16, making the pressure relief cavity 16 first filled with gas to reduce the pressure inside the shell. The continuous gas will gather towards the middle after filling the pressure relief cavity 16, flow through the third pressure relief hole 20 and the auxiliary pressure relief hole 22 on the surface of the second fixing plate 19 into the pressure relief pipeline, and then finally push open the pressure relief valve 24 through the fourth pressure relief hole to lead to the outside to ensure that the pressure inside the shell is consistent with the outside.
[0039] If the pressure inside the battery continues to increase, it will cause the battery to explode and burn. The multiple honeycomb shells 8 separate the battery, preventing the spread of the explosion and combustion, controlling the explosion and combustion within a single cell, reducing the explosion and combustion area, and enabling the multiple honeycomb shells 8, the second fixing plate 19, the reinforcing ribs 6, and the reinforcing plate 3 to bear the force on each other to unload the force and reduce the harm.
Claims
1. A barrier explosion-proof composite circular power battery cover, comprising a cover shell (1), characterized in that: The cover shell (1) has a plurality of snap holes (2) on its surface, a reinforcing plate (3) is fixedly provided on the inner side of the cover shell (1), a sealing ring (4) is fixedly provided on the top of the reinforcing plate (3), threaded holes (5) are provided on the surfaces of the sealing ring (4) and the reinforcing plate (3), and a force unloading component is provided on the inner side of the reinforcing plate (3); The force unloading assembly comprises a reinforcing rib (6) fixed to the reinforcing plate (3) and the cover shell (1); a first fixing plate (7) is fixedly provided on one side of the reinforcing rib (6); a plurality of honeycomb shells (8) are fixedly provided on the inner side of the first fixing plate (7); and the cross-sections of the plurality of honeycomb shells (8) are all arranged to be hexagonal.
2. The barrier explosion-proof composite circular power battery cover according to claim 1, characterized in that: A shock absorber (9) is fixedly provided on the inner side of the honeycomb shell (8), a splicing sector plate (10) is fixedly provided on one end of the shock absorber (9), and a positioning sliding hole (11) is provided on the surface of the splicing sector plate (10).
3. The barrier explosion-proof composite circular power battery cover according to claim 2, characterized in that: A sliding block (12) is slidably disposed inside the positioning sliding hole (11), the cross section of the sliding block (12) being arranged in a cross shape, a combined plate (13) being fixedly disposed on one side of the sliding block (12), and a conductive wire (14) being disposed inside the spliced sector plate (10).
4. The barrier explosion-proof composite circular power battery cover according to claim 3, characterized in that: An electrode sheet (15) is fixedly provided at the bottom of the lead (14), the electrode sheet (15) is fixedly connected to the cover shell (1), a pressure relief cavity (16) is provided between the reinforcing plate (3) and the first fixing plate (7), and a first pressure relief hole (17) is provided on the surface of the reinforcing rib (6).
5. The barrier explosion-proof composite circular power battery cover according to claim 1, characterized in that: A plurality of second pressure relief holes (18) are provided on the surfaces of the first fixing plate (7) and the honeycomb shell (8), and two second fixing plates (19) are fixedly provided between the plurality of honeycomb shells (8).
6. The barrier explosion-proof composite circular power battery cover according to claim 5, characterized in that: A third pressure relief hole (20) is provided on the surface of the two second fixing plates (19), and a pressure relief channel (21) is fixedly provided between the two second fixing plates (19).
7. The barrier explosion-proof composite circular power battery cover according to claim 6, characterized in that: An auxiliary pressure relief hole (22) is provided on the surface of the pressure relief channel (21), a fourth pressure relief hole (23) is provided on the surface of the cover shell (1), and a pressure relief valve (24) is fixedly provided on the outside of the fourth pressure relief hole (23).