Anti-collision power battery shell

Abstract

The utility model discloses an anti-collision power battery shell, and relates to the technical field of battery shells, in particular to an anti-collision power battery shell which comprises a main battery shell and an auxiliary battery shell, and a power battery pack is mounted in the main battery shell; according to the utility model, a plurality of buffer cavities and buffer blocks are arranged in the auxiliary battery shell, and springs and hydraulic oil are arranged in the buffer cavities, so that an efficient buffer energy-absorbing structure is formed. When the power battery is subjected to external impact, the buffer block is firstly subjected to pressure and slides into the buffer cavity, and the spring is compressed at the moment to absorb part of impact energy; meanwhile, the hydraulic oil flows in the buffer cavity, a damping effect is generated through the damping holes, and the impact energy is further dissipated. The double buffering mechanism can effectively reduce the influence of impact force on the internal structure of the battery shell, and the safety and the stability of the power battery when the power battery is impacted are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of battery casing technology, specifically to an impact-resistant power battery casing. Background Technology

[0002] In recent years, with the rapid development of new energy vehicles, the safety and reliability of power batteries, as their core components, have received widespread attention. During the operation of electric vehicles, power batteries may be subjected to various external impacts and collisions, such as vehicle collisions and bumpy roads. These situations can lead to deformation of the battery casing, damage to the internal structure of the battery, and even serious safety accidents such as short circuits and fires. Existing technologies, such as the utility model patent CN210640301U entitled "A Vehicle Power Battery Pack Anti-collision Protection Device," utilize multiple energy-absorbing units, including leaf springs, hydraulic dampers, rubber energy-absorbing pads, and helical spring energy-absorbing columns, to effectively absorb collision energy and protect the power battery pack from destructive damage during a vehicle collision. However, this technical solution primarily focuses on the overall external protective structure of the power battery pack, offering limited improvement to the impact resistance of the battery casing itself. Its protective device structure is relatively complex, and certain safety hazards still exist during high-speed vehicle collisions, failing to completely prevent the impact on the internal structure of the battery casing. In addition, most existing power battery casings are made of a single material and lack effective buffering and energy absorption mechanisms. When subjected to external impacts, they are prone to deformation and damage to the internal structure of the battery.

[0003] Therefore, the existing technology has the following two technical problems: First, the existing power battery casings are insufficient in terms of impact resistance, failing to effectively absorb and dissipate external impact energy, making the internal structure of the battery casing easily damaged. Second, the existing power battery casing structure is complex and still poses safety hazards during high-speed collisions, failing to completely prevent the internal structure of the battery casing from being affected by impact forces. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides an impact-resistant power battery casing, which solves the problems mentioned in the background section.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: an impact-resistant power battery housing, comprising a main battery housing and an auxiliary battery housing, wherein a power battery pack is installed inside the main battery housing; the auxiliary battery housing is fixedly installed below the main battery housing; the auxiliary battery housing includes a support plate, a support frame, and multiple buffer blocks, wherein the lower surface of the support plate is fixedly connected to the support frame, and the support frame has multiple buffer cavities, with each buffer block slidably installed in its respective buffer cavity; each buffer cavity of the support frame is provided with multiple springs, the upper end of which is fixedly connected to the support plate, and the lower end of which is fixedly connected to the buffer block; the buffer cavity of the support frame contains hydraulic oil; the inner frame of the support frame has multiple damping holes, and adjacent buffer cavities inside the support frame are connected through these damping holes.

[0008] Optionally, the upper four periphery of the buffer block is slidably connected to the inner wall of the buffer cavity of the support frame, and multiple sealing gaskets are embedded in the upper four periphery of the buffer block.

[0009] Optionally, after the buffer block slides into the buffer cavity under external pressure, the upper four sides of the buffer block partially block the damping holes.

[0010] Optionally, multiple second lifting lugs are fixedly connected to both sides of the support plate, and multiple first lifting lugs are fixedly connected to the lower part of both outer side walls of the main battery housing. The first lifting lugs and the second lifting lugs are fixedly installed by bolts.

[0011] Optionally, the lower surface of the support plate is welded to the upper surface of the support frame, and the support plate is welded to the second lifting lug.

[0012] Optionally, the auxiliary battery casing is made of aluminum alloy.

[0013] (III) Beneficial Effects

[0014] This utility model provides an impact-resistant power battery casing, which has the following beneficial effects:

[0015] 1. This utility model establishes a highly efficient energy-absorbing buffer structure by incorporating multiple buffer chambers and buffer blocks within the auxiliary battery casing, and configuring springs and hydraulic oil within the buffer chambers. When the power battery is subjected to external impact, the buffer block is first subjected to pressure and slides into the buffer chamber. At this time, the spring is compressed, absorbing a portion of the impact energy. Simultaneously, the hydraulic oil flows within the buffer chamber, generating a damping effect through damping orifices, further dissipating the impact energy. This dual buffering mechanism effectively reduces the impact force on the internal structure of the battery casing, significantly improving the safety and stability of the power battery when impacted, reducing the risk of battery damage due to collisions, and preventing serious safety accidents such as battery short circuits and fires, thus ensuring the safety of vehicles and personnel. This effect effectively solves the problem of insufficient impact resistance in existing power battery casings, significantly improving the protective capability of the battery casing.

[0016] 2. Compared with existing technologies, the impact-resistant power battery housing structure of this utility model is simpler and more reasonable. By fixing the auxiliary battery housing below the main battery housing and using support plates, support frames, and other structures for connection and support, not only is the overall strength and stability of the battery housing guaranteed, but installation and maintenance are also facilitated. Furthermore, the sliding connection between the buffer block and the inner wall of the buffer cavity, as well as the embedded installation of the sealing gasket, further improves the sealing performance and reliability of the device, prevents hydraulic oil leakage, and ensures the long-term effective operation of the buffer energy-absorbing structure. Simultaneously, using aluminum alloy to make the auxiliary battery housing reduces the weight of the battery housing while ensuring strength, improving the lightweight level of the device and contributing to the improvement of the electric vehicle's range and performance. This effectively solves the problem of the complex structure of existing power battery housings and the safety hazards that still exist in high-speed collisions, improving the reliability and practicality of the device. Attached Figure Description

[0017] 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.

[0018] Figure 1 This is a three-dimensional (looking down) structural diagram of an impact-resistant power battery casing according to the present invention.

[0019] Figure 2 This is a three-dimensional structural diagram of the auxiliary battery housing in an anti-impact power battery housing according to the present invention.

[0020] Figure 3This is a three-dimensional (looking down) structural diagram of the support frame in the anti-impact power battery housing of this utility model;

[0021] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle;

[0022] Figure 5 This is a cross-sectional view of the auxiliary battery housing in an anti-impact power battery housing according to the present invention.

[0023] Figure 6 for Figure 5 Enlarged structural diagram at point B;

[0024] Figure 7 This is a cross-sectional view (after the buffer block is compressed) of the auxiliary battery housing in the anti-impact power battery housing of this utility model.

[0025] Figure 8 This is a three-dimensional structural diagram of the main battery casing in an anti-impact power battery casing according to the present invention.

[0026] In the diagram: 1. Main battery casing; 2. First lifting lug; 3. Support plate; 4. Support frame; 5. Second lifting lug; 6. Buffer block; 7. Buffer cavity; 8. Damping hole; 9. Sealing gasket; 10. Spring. Detailed Implementation

[0027] The technical solution of this utility model will now be clearly and completely described in conjunction with the accompanying drawings. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying anything.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0029] Please see Figures 1 to 8 This utility model provides a technical solution: an impact-resistant power battery housing, including a main battery housing 1 and an auxiliary battery housing, wherein a power battery pack is installed inside the main battery housing 1. The auxiliary battery housing is fixedly installed below the main battery housing 1. The power battery pack uses commercially available power batteries, etc.

[0030] The main battery housing 1 is primarily used to house the electric battery pack. Its main function is to provide a relatively stable space for the battery pack, protecting it from external environmental factors such as dust and moisture. Simultaneously, the main battery housing 1 also serves to connect and secure the battery to other vehicle components, ensuring the battery maintains a stable position during vehicle operation. The auxiliary battery housing primarily protects the main battery housing 1, effectively absorbing and dissipating impact energy and reducing the impact of shocks on the battery pack inside the main battery housing 1.

[0031] In this technical solution, the auxiliary battery housing is installed below the main battery housing 1. In actual implementation, the auxiliary battery housing can be installed above, below, left, right, front, or rear of the main battery housing 1, depending on the actual implementation needs. In actual implementation, the main battery housing 1 and the auxiliary battery housing can be installed as an integral structure or as separate structures.

[0032] The auxiliary battery housing includes a support plate 3, a support frame 4, and multiple buffer blocks 6. The lower surface of the support plate 3 is fixedly connected to the support frame 4. The support frame 4 has multiple buffer cavities 7, and each buffer block 6 is slidably installed in its respective buffer cavity 7. Each buffer cavity 7 of the support frame 4 is equipped with multiple springs 10. The upper end of the spring 10 is fixedly connected to the support plate 3, and the lower end of the spring 10 is fixedly connected to the buffer block 6. The buffer cavity 7 of the support frame 4 contains hydraulic oil. The internal frame of the support frame 4 has multiple damping holes 8, and two adjacent buffer cavities 7 inside the support frame 4 are connected through the multiple damping holes 8.

[0033] The main function of the support plate 3 is to provide a stable support platform for the buffer block 6 and to evenly transfer the impact force received by the buffer block 6 to the support frame 4. The support frame 4 is the main structure of the auxiliary battery housing, and it has multiple buffer cavities 7 inside to accommodate the buffer block 6 and the spring 10. The function of the support frame 4 is to provide a fixed installation space for the buffer components (such as the buffer block 6, the spring 10, and hydraulic oil), and through the design of the damping holes 8 inside, to realize the flow of hydraulic oil between the buffer cavities 7 and the generation of a damping effect. When the buffer block 6 is subjected to pressure and slides into the buffer cavity 7, the hydraulic oil flows in the damping holes 8, generating a damping force, further dissipating the impact energy and enhancing the buffering effect. The main function of the buffer block 6 is to first bear the pressure and slide into the buffer cavity 7 when subjected to external impact. Through its own movement, it drives the spring 10 to compress and the hydraulic oil to flow, thereby absorbing and dissipating the impact energy. The spring 10 is installed in each buffer cavity 7 of the support frame 4, with its upper end fixedly connected to the support plate 3 and its lower end fixedly connected to the buffer block 6. The main function of spring 10 is to be compressed when buffer block 6 is subjected to pressure, absorbing some of the impact energy. After the external impact disappears, spring 10 returns to its original shape, providing a restoring force to buffer block 6, allowing it to return to its initial position. This ensures the buffer components can be reused, improving the reliability and durability of the device. Hydraulic oil is contained within the buffer chambers 7 of the support frame 4. Its main function is to generate a damping effect through its flow within the buffer chambers 7, further dissipating impact energy. When buffer block 6 slides into the buffer chambers 7, the hydraulic oil flows through the damping holes 8, generating a damping force. This damping force works in conjunction with the buffering effect of spring 10, forming a dual buffering mechanism that significantly improves the impact resistance of the power battery casing. The main function of damping holes 8 is to adjust the flow speed and direction of hydraulic oil within the buffer chambers 7, thereby controlling the magnitude of the damping force. By rationally designing the number, size, and position of damping holes 8, the buffering effect can be optimized, allowing it to achieve optimal buffering performance under different impact intensities.

[0034] Specifically, the upper four periphery of the buffer block 6 is slidably connected to the inner wall of the buffer cavity 7 of the support frame 4, and multiple sealing gaskets 9 are embedded in the upper four periphery of the buffer block 6.

[0035] The sealing gasket 9 is embedded in the upper periphery of the buffer block 6. Its main function is to improve the sealing between the buffer block 6 and the inner wall of the buffer cavity 7, preventing hydraulic oil leakage. Good sealing performance ensures normal flow of hydraulic oil in the buffer cavity 7, maintains the stable performance of the damping effect, and improves the reliability and service life of the device.

[0036] More specifically, after the buffer block 6 slides into the buffer cavity 7 under external pressure, the upper four sides of the buffer block 6 partially block the damping hole 8.

[0037] The main function of the buffer block 6 is to withstand external impacts and slide into the buffer chamber 7. Its movement compresses the spring 10 and causes the hydraulic oil to flow, thereby absorbing and dissipating the impact energy. At the same time, the upper four sides of the buffer block 6 can block part of the damping holes 8 during the sliding process, further adjusting the flow rate of the hydraulic oil and the magnitude of the damping force, thus optimizing the buffering effect.

[0038] Specifically, multiple second lifting lugs 5 are fixedly connected to both sides of the support plate 3, and multiple first lifting lugs 2 are fixedly connected to the lower part of the two outer side walls of the main battery housing 1. The first lifting lugs 2 and the second lifting lugs 5 are fixedly installed by bolts.

[0039] The first lifting lug 2 and the second lifting lug 5 are fixedly installed with bolts to achieve a firm connection between the auxiliary battery housing and the main battery housing 1. This connection method not only ensures the overall structural strength of the battery housing, but also facilitates installation and disassembly, improving the ease of maintenance of the device.

[0040] More specifically, the lower surface of the support plate 3 is welded to the upper surface of the support frame 4, and the support plate 3 is welded to the second lifting lug 5.

[0041] The support plate 3 and the support frame 4 are welded together to form an integral structure, which enhances the sealing performance and allows the hydraulic oil in the buffer cavity 7 inside the support frame 4 to flow only through the damping hole 8.

[0042] Specifically, the auxiliary battery casing is made of aluminum alloy.

[0043] The auxiliary battery casing is made of aluminum alloy, which reduces the weight of the battery casing while ensuring strength, thus improving the lightweighting of the device and helping to improve the driving range and performance of electric vehicles.

[0044] In operation, when the power battery is subjected to an external impact, the buffer block 6 slides into the buffer chamber 7 under pressure, compressing the spring 10 and absorbing some of the impact energy. Simultaneously, hydraulic oil flows within the buffer chamber 7 (hydraulic oil flows from the pressurized buffer chamber 7 into the unpressurized buffer chamber 7 through the damping hole 8), generating a damping effect through the damping hole 8 to further dissipate the impact energy. During sliding, the upper four sides of the buffer block 6 partially block the damping hole 8, adjusting the flow rate of the hydraulic oil and the magnitude of the damping force to optimize the buffering effect. This dual buffering mechanism significantly reduces the impact force on the internal battery structure of the main battery casing 1, improving the safety and stability of the power battery when impacted. After the external impact disappears, the spring 10 returns to its original shape, providing a restoring force to the buffer block 6, returning it to its initial position, ensuring the buffer assembly can be reused and improving the reliability and durability of the device.

[0045] This utility model features a rationally designed anti-impact power battery casing structure. By optimizing the buffer components inside the auxiliary battery casing, it significantly improves the power battery's buffering and energy absorption capacity when subjected to external impacts, effectively reducing the risk of battery damage caused by collisions. Simultaneously, the device has a simple structure, is easy to install and maintain, and possesses high practicality and reliability. It can be widely applied in fields such as electric vehicles, providing strong protection for the safe operation of power batteries.

[0046] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A crash-impingement-resistant power battery housing, characterized in that: It includes a main battery housing (1) and an auxiliary battery housing. The main battery housing (1) houses a power battery pack. The auxiliary battery housing is fixedly installed below the main battery housing (1). The auxiliary battery housing includes a support plate (3), a support frame (4), and multiple buffer blocks (6). The lower surface of the support plate (3) is fixedly connected to the support frame (4). Multiple buffer cavities (7) are provided on the support frame (4). Each buffer block (6) is slidably installed in each buffer cavity (7) of the support frame (4). Each buffer cavity (7) of the support frame (4) is provided with multiple springs (10). The upper end of the spring (10) is fixedly connected to the support plate (3), and the lower end of the spring (10) is fixedly connected to the buffer block (6). The buffer cavity (7) of the support frame (4) contains hydraulic oil. The inner frame of the support frame (4) is provided with multiple damping holes (8), and two adjacent buffer cavities (7) inside the support frame (4) are connected through multiple damping holes (8).

2. The anti-impact power battery shell according to claim 1, characterized in that: The upper four periphery of the buffer block (6) is slidably connected to the inner wall of the buffer cavity (7) of the support frame (4), and multiple sealing gaskets (9) are embedded in the upper four periphery of the buffer block (6).

3. The crash-impact resistant battery housing of claim 2, wherein: After the buffer block (6) slides into the buffer cavity (7) under external pressure, the upper four sides of the buffer block (6) block part of the damping hole (8).

4. The impact-resistant battery case of claim 1, wherein: Multiple second lifting lugs (5) are fixedly connected to both sides of the support plate (3), and multiple first lifting lugs (2) are fixedly connected to the lower part of the two outer side walls of the main battery housing (1). The first lifting lugs (2) and the second lifting lugs (5) are fixedly installed by bolts.

5. The impact-resistant battery case of claim 4, wherein: The lower surface of the support plate (3) is welded to the upper surface of the support frame (4), and the support plate (3) is welded to the second lifting lug (5).

6. The impact-resistant battery case of claim 1, wherein: The auxiliary battery casing is made of aluminum alloy.

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