Anti-extrusion anti-explosion damper for battery of electric vehicle

Abstract

The utility model discloses an electric automobile battery anti-extrusion explosion-proof damper which comprises a placing table, a base fixedly connected to the center of the placing table, a balance rod movably connected to the base, a limiting table fixedly connected to the balance rod, a hydraulic rod fixedly connected to the top of the limiting table, and a connecting block fixedly connected to the top of the hydraulic rod. And four auxiliary rods are movably connected between the limiting table and the placing table. Through the linkage design of the center main hydraulic rod and the four-corner auxiliary rods, graded dissipation of impact energy and active suppression of pressure out-of-control are achieved. The hydraulic rod energy accumulator absorbs axial pressure, the auxiliary rod deflects in a self-adaptive mode to disperse lateral stress, and the structural stability and the anti-explosion capacity of the battery pack under the collision working condition are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of damper technology, and more specifically to an anti-explosion and anti-crushing damper for electric vehicle batteries. Background Technology

[0002] With the increasing popularity of electric vehicles, the safety of power batteries has become a critical issue. Battery packs are susceptible to damage during vehicle collisions, compression, or vibrations due to casing deformation, leading to short circuits or thermal runaway, and potentially causing fires or even explosions. Current battery protection devices often employ rigid shells or simple buffer layers, which cannot simultaneously meet the requirements for resistance to compression, explosion protection, and multi-directional impact energy absorption. While some solutions incorporate damping materials, their simple structures fail to effectively distribute pressure and suppress sudden increases in internal pressure.

[0003] Therefore, there is an urgent need for a multi-layered composite damper that takes into account mechanical strength, energy dissipation, and explosion-proof performance. Utility Model Content

[0004] This invention proposes a damper that uses a central main hydraulic rod and four corner auxiliary rods working together to dissipate hydraulic energy and provide multi-directional mechanical support, thereby solving the problem of local stress concentration and pressure runaway when the battery pack is subjected to impact.

[0005] To achieve the above objectives, this utility model provides a compression-resistant and anti-burden protection system for electric vehicle batteries.

[0006] An explosion damper includes: a placement platform, a first base fixedly connected to the center of the placement platform, a balance bar movably connected to the first base, a limiting platform fixedly connected to the balance bar, a hydraulic rod fixedly connected to the top of the limiting platform, a connecting block fixedly connected to the top of the hydraulic rod, and four auxiliary rods movably connected between the limiting platform and the placement platform.

[0007] Preferably, the balance bar is provided with a spherical locking block at the connection end with the first base; the first base has a cavity inside that cooperates with the spherical locking block, and the top of the first base has a movable groove, through which the balance bar rotates on the first base.

[0008] Preferably, the auxiliary rod includes a compression cylinder and a compression rod. The compression cylinder is sleeved outside the compression rod, and the two are interference-fitted. A pressure plate is provided at the end of the compression rod that connects to the compression cylinder. A spring is provided inside the compression cylinder. When the compression rod is subjected to pressure, the pressure plate compresses the spring, causing the spring to deform.

[0009] Preferably, the auxiliary rod has protrusions at both ends, and multiple second bases are provided on the four sides of the top of the placement platform and the side of the limiting platform. The second bases are movably connected to the protrusions at both ends of the auxiliary rod.

[0010] Preferably, the hydraulic rod includes a support tube and a sliding tube; the sliding tube is sleeved outside the support tube, the bottom of the support tube is provided with a plug, the top is fixedly connected with a fixing plug, and a long spring is also provided inside the support tube.

[0011] Preferably, a central rod is bolted to the center of the sliding tube, and the central rod has multiple limiting holes. A piston is fixedly connected to the bottom of the central rod, and a short spring and a valve are provided between the piston and the fixed plug.

[0012] Preferably, the valve includes a check valve and a toothed valve, with the check valve sleeved on top of the toothed valve.

[0013] Preferably, there is a tiny annular gap between the fixed plug and the central rod, through which liquid flows between them.

[0014] Preferably, the sliding tube has a connecting block at the top and a cap at the bottom.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] Multi-stage energy absorption: Through the flexible rotation of the balance bar, the spring buffer of the auxiliary bar, and the hydraulic buffer of the hydraulic rod, it can effectively disperse and absorb the extrusion force from all directions, protect the electric vehicle battery from extrusion damage, and reduce the risk of battery explosion.

[0017] Omnidirectional Protection: The spherical locking block allows the balance bar to rotate 360°, effectively countering impacts from any direction. Dynamic Damping Adjustment: The valve design enables the damper to automatically adjust its buffering performance according to different compression conditions, improving the damper's adaptability and reliability.

[0018] Structural stability: The reasonable connection and cooperation between the components, as well as the pressure balancing effect of the tiny annular gaps, ensure the stability of the damper during operation. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0020] Figure 1 The attached figure is a structural schematic diagram of this utility model.

[0021] Figure 2 The attached figure is a partial sectional view of the balance bar of this utility model.

[0022] Figure 3 The attached figure is a cross-sectional view of the secondary rod of this utility model.

[0023] Figure 4 The attached figure is a cross-sectional view of the hydraulic rod of this utility model.

[0024] Reference numerals: 1. Placement platform; 2. Balance bar; 3. Base; 4. Secondary bar; 5. Fixed seat; 6. Hydraulic rod; 7. Connecting block; 8. Limiting platform; 21. Locking block; 31. Movable groove; 41. Compression cylinder; 42. Compression rod; 43. Protrusion; 61. Support tube; 62. Sliding tube; 63. Center rod; 64. Bolt; 65. Limiting hole; 66. Piston; 67. Fixed plug; 68. Valve; 69. Check valve; 70. Toothed valve; 71. Short spring; 72. Long spring; 73. Cover; 74. Plug cover; A. First oil chamber; B. Second oil chamber. Detailed Implementation

[0025] To facilitate understanding by those skilled in the art, various embodiments of this patent will be described below with reference to text and accompanying drawings. For clarity, many practical details will be explained in the following description. However, it should be understood that these practical details in the specification should not be used to limit this patent. That is, in some embodiments of this patent, these practical details are not essential. Furthermore, for ease of understanding, some conventional structures and components will be illustrated in the drawings in a simple schematic manner.

[0026] In the description of this patent, it should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this patent.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0028] In the description of this patent, "multiple" means two or more, unless otherwise explicitly specified.

[0029] In this patent, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0030] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this patent.

[0031] Please see the appendix Figure 1 This utility model discloses an anti-explosion and anti-collapse damper for electric vehicle batteries, comprising: a placement platform 1, a first base 3 fixedly connected to the center of the placement platform 1, a balance bar 2 movably connected to the first base 3, a limiting platform 8 fixedly connected to the balance bar 2, a hydraulic rod 6 fixedly connected to the top of the limiting platform 8, a connecting block 7 fixedly connected to the top of the hydraulic rod 6, and four auxiliary rods 4 movably connected between the limiting platform 8 and the placement platform 1.

[0032] Please see the appendix Figure 2 To further optimize the above technical solution, a spherical locking block 21 is provided at the connection end between the balance bar 2 and the first base 3; the first base 3 has a cavity inside that cooperates with the spherical locking block 21, and a movable groove 31 is provided on the top of the first base 3. The balance bar 2 rotates on the first base 3 through the spherical locking block 21 and the movable groove 31. This enhances the adaptability to complex extrusion directions and disperses the impact force.

[0033] Please see the appendix Figure 3 To further optimize the above technical solution, the auxiliary rod 4 includes a compression cylinder 41 and a compression rod 42. The compression cylinder 41 is sleeved on the outside of the compression rod 42, and the two are interference-fitted. A pressure plate is provided at the end of the compression rod 42 that connects to the compression cylinder 41. A spring is provided inside the compression cylinder 41. When the compression rod 42 is subjected to pressure, the pressure plate compresses the spring, causing the spring to deform. This provides primary damping, absorbing the extrusion energy through spring deformation.

[0034] Please see the appendix Figure 1To further optimize the above technical solution, protrusions 43 are provided at both ends of the auxiliary rod 4, and multiple second bases 5 are provided on the four sides of the top of the placement platform 1 and the side of the limiting platform 8. The second bases 5 are movably connected to the protrusions 43 at both ends of the auxiliary rod 4. The movable connection design between the protrusions 43 and the second bases 5 allows the auxiliary rod 4 to slide and be limited when under pressure, avoiding excessive displacement that could lead to structural failure.

[0035] Please see the appendix Figure 4 To further optimize the above technical solution, the hydraulic rod 6 includes a support tube 61 and a sliding tube 62; the sliding tube 62 is sleeved on the outside of the support tube 61, the bottom of the support tube 61 is provided with a plug 74, and the top is fixedly connected with a fixing plug 67, and the support tube 61 is also provided with a long spring 72 inside. The long spring 72 built into the support tube 61 forms a two-stage elastic buffer, which works in conjunction with the hydraulic damping.

[0036] To further optimize the above technical solution, a central rod 63 is connected to the center of the sliding tube 62 via bolts 64. The central rod 63 has multiple limiting holes 65. A piston 66 is fixedly connected to the bottom of the central rod 63. A short spring 71 and a valve 68 are also provided between the piston 66 and the fixed plug 67. The flow of liquid is controlled by the short spring 71 and the valve 68, achieving dynamic adjustment of hydraulic damping.

[0037] To further optimize the above technical solution, the valve 68 includes a check valve 69 and a toothed valve 70, with the check valve 69 sleeved on top of the toothed valve 70. The combined design of the check valve 69 and the toothed valve 70 both limits the maximum flow rate and provides graded damping characteristics.

[0038] To further optimize the above technical solution, a tiny annular gap is provided between the fixed plug 67 and the central rod 63, through which liquid flows. This annular gap allows for bypass flow of the liquid, preventing hydraulic lock-up and ensuring that the piston 66 can be reset.

[0039] To further optimize the above technical solution, the sliding tube 62 is provided with a connecting block 7 at the top and a cap 73 at the bottom. The design of the cap 73 and the connecting block 7 completes the hydraulic rod sealing and transmits the damping force to the external structure through the connecting block 7.

[0040] Working principle:

[0041] In use, the connecting block 7 is fixed to the vehicle body, and the car battery is fixedly connected to the placement platform 1. When the vehicle collides and the battery is subjected to pressure, the placement platform 1 tilts and shifts via the balance bar 2, while the first wave of impact is dissipated via the four auxiliary rods 4 movably connected to the side of the limiting platform 8. When the hydraulic rod 6 is stationary, the first oil chamber A is full of oil. Upon impact, the sliding tube 62 begins to move and the spring compresses. The oil in the first oil chamber A flows into the second oil chamber B through the annular gap between the central rod 63 and the fixed plug 67, opening the valve 68 and forming a buffer. When the impact ends, the pressure in the second oil chamber B begins to increase under the action of the compression spring. The pressurized oil closes the check valve 69 and is squeezed out of the second oil chamber B through the limiting holes 65 on the balance bar 2. When a pair of limiting holes 65 are lower than the valve 68, the oil resistance in the second oil chamber B increases, forming a buffer in conjunction with the short spring. Through the coordinated work of these components, the compressive force is effectively buffered and dispersed, protecting the electric vehicle battery.

[0042] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0043] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An anti-extrusion explosion-proof damper for an electric vehicle battery, characterized by, The utility model relates to a kind of balanceable placing table, including: Placement table (1), the first base (3) is fixedly connected with the center position of the placement table (1), the first base (3) is movably connected with balance bar (2), the balance bar (2) is fixedly connected with limiting table (8), the hydraulic rod (6) is fixedly connected with the top of the limiting table (8), the connecting block (7) is fixedly connected with the top of the hydraulic rod (6), four vice rods (4) are movably connected between the limiting table (8) and the placement table (1).

2. The crush resistant blast mitigating damper for an electric vehicle battery of claim 1, wherein, The connecting end of the balance bar (2) and the first base (3) is provided with a spherical clamping block (21);The first base (3) is provided with a cavity matched with the spherical clamping block (21) in the inside, and the first base (3) is provided with a movable slot (31) in the top, and the balance bar (2) is rotated on the first base (3) by the spherical clamping block (21) and the movable slot (31).

3. The crush resistant blast mitigating damper for an electric vehicle battery of claim 1, wherein, The vice rod (4) includes a compression cylinder (41) and a compression rod (42), the compression cylinder (41) is sleeved outside the compression rod (42), and the two are interference fit, and one end of the compression rod (42) is provided with a pressing table relative to the compression cylinder (41);The inside of the compression cylinder (41) is provided with a spring, when the compression rod (42) is pressed, the pressing table deforms the spring by pressing the spring.

4. The crush resistant blast mitigating damper for an electric vehicle battery of claim 3, wherein, The two ends of the vice rod (4) are respectively provided with protruding blocks (43), and the top of the placement table (1) and the side of the limiting table (8) are provided with a plurality of second bases (5), and the second base (5) is movably connected with the protruding block (43) at the two ends of the vice rod (4).

5. The crush resistant blast mitigating damper for an electric vehicle battery of claim 1, wherein, The hydraulic rod (6) includes a support pipe (61) and a sliding pipe (62);The sliding pipe (62) is sleeved outside the support pipe (61), the bottom of the support pipe (61) is provided with a plug cover (74), and the top is fixedly connected with a fixed plug (67), and the inside of the support pipe (61) is further provided with a long spring (72).

6. The crush resistant blast mitigating damper for an electric vehicle battery of claim 5, wherein, The inside of the sliding pipe (62) is connected with a center rod (63) through a bolt (64) at the center position, the center rod (63) is provided with a plurality of limiting holes (65), and the bottom of the center rod (63) is fixedly connected with a piston (66), and the piston (66) is further provided with a short spring (71) and a valve (68) between the fixed plug (67).

7. The crush resistant blast mitigating damper for an electric vehicle battery of claim 6, wherein, The valve (68) includes a check valve (69) and a toothed valve (70), and the check valve (69) is sleeved on the toothed valve (70).

8. The crush resistant blast mitigating damper for an electric vehicle battery of claim 6, wherein, There is a small annular gap between the fixed plug (67) and the center rod (63), and liquid flows between the two through the gap.

9. The crush resistant blast mitigating damper for an electric vehicle battery of claim 5, wherein, The top of the sliding pipe (62) is provided with a connecting block (7), and the bottom is provided with a sealing cover (73).

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