A new energy vehicle lithium battery extrusion protection structure

Abstract

The utility model relates to the technical field of protection structure, especially is a kind of extrusion protection structure of new energy automobile lithium battery, including outer frame subassembly, outer frame subassembly inboard is attached with buffer assembly, battery assembly is attached with buffer assembly inboard, buffer assembly includes buffer steel ring, second locating slot is set up in buffer steel ring outboard, third locating slot is set up in buffer steel ring inboard, second locating steel ring is fixedly connected with buffer steel ring inboard, second air bag is attached with second locating slot inboard, first air bag is attached with third locating slot inboard, battery assembly includes battery containment shell, the cover plate is fixedly connected with battery containment shell upper end by screw, lithium battery body is installed in battery containment shell inboard, battery containment shell bottom end is fixedly connected with pedestal, in the utility model, device can protect lithium battery to reduce multidirectional extrusion damage, the component after protection can be automatically restored shape and reuse, reduce damage probability, improve practicality and economy.

Description

Technical Field

[0001] This utility model relates to the field of protective structure technology, specifically to an extrusion protective structure for lithium batteries in new energy vehicles. Background Technology

[0002] Lithium-ion batteries for new energy vehicles are high-energy-density rechargeable batteries that use lithium ions to move between positive and negative electrodes to store and release electrical energy. These batteries have advantages such as high voltage, high energy density, long cycle life, and low self-discharge rate, providing strong power support for new energy vehicles, enabling long-distance driving and fast charging. At the same time, lithium-ion batteries also have relatively small size and weight, as well as good temperature adaptability and safety. They are one of the core components of new energy vehicles, driving the automotive industry towards electrification and decarbonization. During the use of lithium batteries in new energy vehicles, the batteries may be subjected to compression from multiple directions. In current technology, when the battery is impacted, the deformation of the protective structure is mainly used to buffer the impact and thus provide some protection for the lithium battery. However, although this protection method can protect the lithium battery to a certain extent, the protective structure is often difficult to restore to its original shape after being deformed by the impact, and therefore difficult to reuse. Therefore, in order to address the above problems, a compression protection structure for lithium batteries in new energy vehicles is proposed. Utility Model Content

[0003] The purpose of this invention is to provide a compression protection structure for lithium batteries in new energy vehicles, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A compression protection structure for a lithium battery in a new energy vehicle includes an outer frame assembly, a buffer assembly attached to the inner side of the outer frame assembly, a battery assembly attached to the inner side of the buffer assembly, the buffer assembly including a buffer steel ring, a second positioning groove on the outer side of the buffer steel ring, a third positioning groove on the inner side of the buffer steel ring, a second positioning steel ring fixedly connected to the inner side of the buffer steel ring, a second airbag attached to the inner side of the second positioning groove, a first airbag attached to the inner side of the third positioning groove, the battery assembly including a battery housing shell, a cover plate fixedly connected to the upper end of the battery housing shell by screws, a lithium battery body installed inside the battery housing shell, a base fixedly connected to the bottom end of the battery housing shell, a fourth positioning groove on the outer side of the battery housing shell, and the first airbag sleeved on the outer side of the fourth positioning groove.

[0005] As a further optimization of this utility model, the outer frame assembly includes a fixing ring, a steel sleeve is fixedly connected to the inner side of the fixing ring, and an installation hole is provided on the inner side of the fixing ring.

[0006] As a further optimization of this utility model, the inner side of the steel sleeve is fixedly connected to a first positioning steel ring, and a first positioning groove is opened on the inner side of the steel sleeve, with first positioning steel rings distributed at both the upper and lower ends of the first positioning groove.

[0007] As a further optimization of this utility model, the outer side of the second airbag is fitted with the inner side of the first positioning groove, and the outer side of the second airbag is positioned between the two first positioning steel rings.

[0008] As a further optimization of this utility model, a gap is provided between the outer side of the buffer steel ring and the inner side of the steel sleeve, and a gap is provided between the inner side of the buffer steel ring and the outer side of the battery housing.

[0009] As a further optimization of this utility model, the buffer steel ring and the second positioning steel ring are both circular ring structures, and the buffer steel ring is located inside the steel sleeve.

[0010] As a further optimization of this utility model, the bottom end of the base is flush with the bottom end of the fixing ring at the lower end, and screw holes are provided on the inner side of the battery housing and the inner side of the cover plate.

[0011] Compared with the prior art, the beneficial effects of this utility model are: In this invention, the device effectively protects the lithium battery from damage caused by multi-directional compression through the outer frame assembly, buffer assembly, and battery assembly. The buffer component provides high-strength cushioning, reducing the impact damage to the battery. After an impact, the relevant components can automatically recover their shape and can be reused, reducing the probability of damage, improving the practicality and economy of the protective structure, enhancing the safety and reliability of the lithium battery, and extending its service life. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional structural diagram of the outer frame assembly of this utility model; Figure 3 This is a cross-sectional structural diagram of the battery assembly of this utility model; Figure 4 This is a schematic diagram of the fixing ring structure of this utility model; Figure 5 This is an exploded view of the battery assembly of this utility model; Figure 6 This is a cross-sectional structural diagram of the buffer component of this utility model.

[0013] In the figure: 1. Outer frame assembly; 11. Fixing ring; 12. Steel sleeve; 13. First positioning steel ring; 14. First positioning groove; 2. Buffer assembly; 21. Buffer steel ring; 22. Second positioning groove; 23. Third positioning groove; 24. Second positioning steel ring; 25. First airbag; 26. Second airbag; 3. Battery assembly; 31. Battery housing; 32. Cover plate; 33. Screw; 34. Base; 35. Lithium battery body; 36. Fourth positioning groove. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0016] Please see Figures 1-6 This utility model provides a technical solution: A compression protection structure for a lithium battery in a new energy vehicle includes an outer frame assembly 1, a buffer assembly 2 attached to the inner side of the outer frame assembly 1, a battery assembly 3 attached to the inner side of the buffer assembly 2, the buffer assembly 2 including a buffer steel ring 21, a second positioning groove 22 on the outer side of the buffer steel ring 21, a third positioning groove 23 on the inner side of the buffer steel ring 21, a second positioning steel ring 24 fixedly connected to the inner side of the buffer steel ring 21, a second airbag 26 attached to the inner side of the second positioning groove 22, and a first airbag 25 attached to the inner side of the third positioning groove 23. The battery assembly 3 includes a battery housing shell 31, a cover plate 32 fixedly connected to the upper end of the battery housing shell 31 by screws 33, a lithium battery body 35 installed inside the battery housing shell 31, a base 34 fixedly connected to the bottom end of the battery housing shell 31, a fourth positioning groove 36 on the outer side of the battery housing shell 31, and the first airbag 25 sleeved on the outer side of the fourth positioning groove 36.

[0017] As a further implementation of this solution, the outer frame assembly 1 includes a fixing ring 11, a steel sleeve 12 is fixedly connected to the inner side of the fixing ring 11, and an installation hole is provided on the inner side of the fixing ring 11. Through the above-mentioned arrangement, this structural design makes the connection between the fixing ring 11 and the steel sleeve 12 stable, and the installation hole facilitates the installation and fixing of the device, enhances the stability of the device, and provides a more reliable protection foundation for the lithium battery. As a further implementation of this solution, a first positioning steel ring 13 is fixedly connected to the inner side of the steel sleeve 12, and a first positioning groove 14 is opened on the inner side of the steel sleeve 12. The first positioning steel ring 13 is distributed at both the upper and lower ends of the first positioning groove 14. Through the above arrangement, the components inside the steel sleeve 12 can play a good supporting and limiting role. The arrangement of the first positioning groove 14 provides installation space for other components, making the internal structure layout of the device reasonable, improving the overall structural strength and stability of the device, and helping to better protect the lithium battery. As a further implementation of this solution, the outer side of the second airbag 26 is fitted with the inner side of the first positioning groove 14, and the outer side of the second airbag 26 is positioned between the two first positioning steel rings 13. Through the above arrangement, the first positioning steel rings 13 simultaneously limit the second airbag 26, preventing the second airbag 26 from excessive displacement or deformation, thereby improving the buffering effect and reliability of the device and better protecting the lithium battery from impact damage. As a further implementation of this solution, a gap is provided between the outer side of the buffer steel ring 21 and the inner side of the steel sleeve 12, and a gap is provided between the inner side of the buffer steel ring 21 and the outer side of the battery housing 31. Through the above-mentioned settings, these gaps provide deformation space for the buffer steel ring 21 when it is impacted, so that the buffer steel ring 21 can deform after being squeezed and absorb impact energy, while avoiding excessive friction and damage between components, and improving the buffering performance and service life of the device. As a further implementation of this solution, the buffer steel ring 21 and the second positioning steel ring 24 are both circular ring structures. The buffer steel ring 21 is located inside the steel sleeve 12. Through the above arrangement, the circular ring structure of the buffer steel ring 21 and the second positioning steel ring 24 has good structural stability and uniform force characteristics, and can better withstand the extrusion force from all directions. The design of the buffer steel ring 21 being located inside the steel sleeve 12 enables it to form effective support for the steel sleeve 12 when it is impacted, thereby enhancing the buffering capacity and protection effect of the device. As a further implementation of this solution, the bottom end of the base 34 is flush with the bottom end of the fixing ring 11 at the lower end, and screw holes are provided on the inner side of the battery housing 31 and the inner side of the cover plate 32. Through the above settings, the overall structural balance and stability of the device are ensured, which is beneficial to the safety protection of the lithium battery.

[0018] Workflow: During installation, first, fix the base 34 to the inside of the battery compartment. Align the screw holes on the cover plate 32 with the screw holes on the battery housing 31, and fix the cover plate 32 to the battery housing 31 with screws 33. Place the first airbag 25 inside the third positioning groove 23, between the two second positioning steel rings 24. Then, put the buffer steel ring 21 and the two first airbags 25 on the outside of the battery housing 31, so that the inner sides of the two first airbags 25 are respectively in contact with the fourth positioning groove 36. The second airbag 26 is installed inside the fixing ring 11, so that the outer side of the second airbag 26 is in contact with the inner side of the first positioning groove 14. The second airbag 26 is placed between the two first positioning steel rings 13. The second airbag 26 is put on the outside of the buffer steel ring 21, so that the inner side of the second airbag 26 is in contact with the second positioning groove 22. Finally, fix the fixing ring 11 inside the battery compartment to complete the installation. During use, if a collision occurs and an object is pressed towards the lithium battery body 35, the object collides with one end of the fixing ring 11. At this time, the fixing point near that end of the fixing ring 11 detaches from the battery compartment. The fixing point can be a spot weld or a screw. The end of the fixing ring 11 that is impacted then displaces towards the lithium battery body 35, and the fixing ring 11 compresses the second airbag 26. The second airbag 26 provides an initial cushioning effect. At the same time, under the action of the second airbag 26, a uniform gap is maintained between the buffer steel ring 21 and the steel sleeve 12. When subjected to a large impact, the buffer steel ring 21 will be subjected to a squeezing force. The second positioning groove 22 squeezes the first airbag 25, and the first airbag 25 plays a buffering role again. When the buffer steel ring 21 approaches the opposite surface that was impacted, the buffer steel ring 21 will deform. The end of the fixed ring 11 that was not impacted supports the buffer steel ring 21. After the buffer steel ring 21 deforms, it expands into the steel sleeve 12. The deformation of the buffer steel ring 21 achieves a high-strength buffering effect, thereby achieving the effect of protecting the lithium battery body 35. After use, the fixing ring 11, steel sleeve 12, buffer steel ring 21, and second positioning steel ring 24 are all made of stainless steel and can spring back. At the same time, the first airbag 25 can also spring back. The second positioning steel ring 24 and the first positioning steel ring 13 limit the first airbag 25 to prevent it from being damaged by excessive compression. At the same time, the second positioning steel ring 24 and the first positioning steel ring 13 limit the first airbag 25 and the second airbag 26. This structure reduces the probability of damage after being compressed, and can be reused by automatically returning to its shape, thus improving its practicality.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A compression protection structure for lithium batteries in new energy vehicles, comprising an outer frame assembly (1), characterized in that: The outer frame assembly (1) has a buffer assembly (2) attached to its inner side, and the buffer assembly (2) has a battery assembly (3) attached to its inner side. The buffer assembly (2) includes a buffer steel ring (21), a second positioning groove (22) is provided on the outer side of the buffer steel ring (21), a third positioning groove (23) is provided on the inner side of the buffer steel ring (21), a second positioning steel ring (24) is fixedly connected to the inner side of the buffer steel ring (21), a second airbag (26) is attached to the inner side of the second positioning groove (22), and a first airbag (25) is attached to the inner side of the third positioning groove (23). The battery assembly (3) includes a battery housing (31), a cover plate (32) is fixedly connected to the upper end of the battery housing (31) by screws (33), a lithium battery body (35) is installed inside the battery housing (31), a base (34) is fixedly connected to the bottom end of the battery housing (31), and a fourth positioning groove (36) is opened on the outer side of the battery housing (31). The first airbag (25) is fitted on the outside of the fourth positioning groove (36).

2. The extrusion protection structure for a new energy vehicle lithium battery according to claim 1, characterized in that: The outer frame assembly (1) includes a fixing ring (11), a steel sleeve (12) is fixedly connected to the inner side of the fixing ring (11), and an installation hole is provided on the inner side of the fixing ring (11).

3. The extrusion protection structure for a new energy vehicle lithium battery according to claim 2, characterized in that: The inner side of the steel sleeve (12) is fixedly connected to a first positioning steel ring (13), and a first positioning groove (14) is opened on the inner side of the steel sleeve (12). The first positioning steel ring (13) is distributed at both the upper and lower ends of the first positioning groove (14).

4. The extrusion protection structure for a new energy vehicle lithium battery according to claim 1, characterized in that: The outer side of the second airbag (26) is fitted with the inner side of the first positioning groove (14), and the outer side of the second airbag (26) is positioned between the two first positioning steel rings (13).

5. The extrusion protection structure for a new energy vehicle lithium battery according to claim 1, characterized in that: A gap is provided between the outer side of the buffer steel ring (21) and the inner side of the steel sleeve (12), and a gap is provided between the inner side of the buffer steel ring (21) and the outer side of the battery housing (31).

6. The extrusion protection structure for a new energy vehicle lithium battery according to claim 1, characterized in that: The buffer steel ring (21) and the second positioning steel ring (24) are both circular ring structures, and the buffer steel ring (21) is located inside the steel sleeve (12).

7. The extrusion protection structure for a new energy vehicle lithium battery according to claim 1, characterized in that: The bottom end of the base (34) is flush with the bottom end of the fixing ring (11) at the lower end, and screw holes are provided on the inner side of the battery housing (31) and the inner side of the cover plate (32).

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