High-stability cylindrical battery steel shell structure

Abstract

The utility model discloses a high-stability cylindrical battery steel shell structure which comprises a first shell, a second shell and a third shell are arranged at the upper end and the lower end of the first shell respectively, reinforcing ribs are arranged on the circumference of an inner cavity of the first shell, and reinforcing plates are arranged on the inner sides of the reinforcing ribs. And one ends of a plurality of heat conduction rods are installed on the circumference of the outer wall of the reinforcing plate, the other ends of the heat conduction rods are fixedly connected to the inner wall of the first shell, and the inner side of the first shell and the inner side of the reinforcing plate are filled with fireproof buffer cotton. According to the device, the internal reinforcing ribs and the reinforcing plates cooperate to disperse stress, improve structural stability and reduce deformation, the heat conduction rods and the graphite heat dissipation stickers cooperate to effectively control temperature and prevent high temperature from affecting performance, in addition, the fireproof buffer cotton on the inner side of the device enhances safety protection, heat insulation and buffering and comprehensively improves performance in multiple aspects, cost effectiveness is balanced, and the device is suitable for popularization and application. The method does not need to greatly increase cost and process complexity, can better adapt to complex working conditions, and has popularization and application values.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, concretely is a kind of high-stability cylindrical battery steel shell structure. BACKGROUND

[0002] With the rapid development of modern science and technology, the performance requirements of batteries in various electronic devices and new energy vehicles and other fields are increasingly improved. Cylindrical batteries are widely used in many application scenarios due to their compact structure, relatively high energy density, and ease of assembly. However, in actual application, the cylindrical battery steel shell structure still faces many stability problems, which need to be solved to further improve the overall performance and safety of the battery.

[0003] In the use of the battery, the steel shell needs to withstand various forces from the inside and outside. From the inside, a series of complex chemical reactions occur during the charging and discharging of the battery, which often accompanies the generation and absorption of gas, causing the internal pressure of the battery to be in a state of constant change. For example, during fast charging, the chemical reaction rate inside the battery increases, the amount of gas generated increases, and the internal pressure rises sharply. The ordinary steel shell structure is prone to swelling and deformation under this pressure, which may cause the distance between the electrode and the steel shell to decrease, increasing the risk of short circuit and affecting the normal use and life of the battery. Moreover, as the energy density of the battery continues to increase, the volume change of the electrode material during charging and discharging is more significant, and the stress on the steel shell also increases accordingly, which puts higher requirements on the structural stability of the steel shell. From the external factors, the battery will inevitably be subjected to various mechanical impacts in actual application scenarios, such as accidental dropping of electronic devices, bumps and vibrations during driving of new energy vehicles, etc. The traditional cylindrical battery steel shell structure has limited rigidity and deformation resistance when facing these external impact forces, and is prone to local indentation, deformation, or even rupture, which not only damages the sealed environment inside the battery, causing electrolyte leakage and affecting battery performance, but also may cause safety hazards such as short circuit, overheating, or even fire and explosion.

[0004] In summary, the existing cylindrical battery steel shell structure still has many deficiencies in dealing with the stability problems of internal pressure changes, external mechanical impact and heat management, etc., and it is difficult to meet the needs of current high-performance and high-safety battery applications, therefore, an innovative and high-stability cylindrical battery steel shell structure that comprehensively considers various factors is urgently needed to overcome the above-mentioned defects of the prior art. Practical new type content

[0005] The purpose of the present application is to provide a high-stability cylindrical battery steel shell structure to solve the problems raised in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solution: a high-stability cylindrical battery steel shell structure, comprising a first shell, the upper and lower ends of the first shell are respectively provided with a second shell and a third shell, the inner cavity circumference of the first shell is provided with a reinforcing rib, the inner side of the reinforcing rib is provided with a reinforcing plate, the outer wall circumference of the reinforcing plate is mounted with one end of a plurality of heat-conducting rods, and the other end of the heat-conducting rod is fixedly connected to the inner wall of the first shell, and the inner side of the first shell and the reinforcing plate is filled with fire-resistant buffer cotton.

[0007] Preferably, the outer walls of the first shell, the second shell and the third shell are all provided with graphite heat dissipation stickers.

[0008] Preferably, the number of reinforcing ribs is several, and the spacing between every two adjacent reinforcing ribs is 0.5 cm.

[0009] Compared with the prior art, the high-stability cylindrical battery steel shell structure has the following advantages: through the cooperation between the reinforcing rib and the reinforcing plate, the overall strength can be increased, through the cooperation between the heat-conducting rod and the graphite heat dissipation sticker, the heat generated inside the battery can be better transferred to the outside, thereby achieving the purpose of heat dissipation, and through the fire-resistant buffer cotton, the reinforcing plate can be buffered to a certain extent, so that the battery cell inside the reinforcing plate will not be damaged due to collision with the inner wall, and the harm caused by accidental situations of the battery cell can also be avoided; the device not only uses internal reinforcing ribs and reinforcing plates to cooperate, disperse stress, improve structural stability and reduce deformation, but also uses heat-conducting rods and graphite heat dissipation stickers to cooperate, effectively control temperature and avoid the influence of high temperature on performance, in addition, the fire-resistant buffer cotton inside enhances safety protection, heat insulation and buffering, and comprehensively improves performance in many aspects, and the cost-benefit balance is achieved without significantly increasing cost and process complexity, which can better adapt to complex working conditions and has application value. BRIEF DESCRIPTION OF DRAWINGS

[0010] Fig. 1 The structure of the present application is shown in the figure;

[0011] Fig. 2The first shell internal structure schematic view of the utility model;

[0012] Fig. 3 The reinforcing rib plan view of the utility model.

[0013] In the drawing: 1, first shell, 2, second shell, 3, third shell, 4, reinforcing rib, 5, reinforcing plate, 6, heat conduction rod, 7, fire-resistant buffer cotton, 8, graphite heat dissipation patch. DETAILED DESCRIPTION

[0014] The technical scheme in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0015] Please refer to Figs. 1-3 The utility model provides a kind of technical scheme: a high stability cylindrical battery steel shell structure, including first shell 1, the upper and lower ends of first shell 1 are respectively provided with second shell 2 and third shell 3, the inner cavity circumference of first shell 1 is provided with reinforcing rib 4, the inside of reinforcing rib 4 is provided with reinforcing plate 5, the outer wall circumference of reinforcing plate 5 is mounted with the one end of multiple heat conduction rods 6, and the other end of heat conduction rod 6 is fixedly connected on the inner wall of first shell 1, the inside of first shell 1 and reinforcing plate 5 is filled with fire-resistant buffer cotton 7.

[0016] As a preferred scheme, further, the outer wall of first shell 1, second shell 2 and third shell 3 is provided with graphite heat dissipation patch 8.

[0017] As a preferred scheme, further, the number of reinforcing rib 4 is several, and the spacing between every two adjacent reinforcing rib 4 is 0.5cm.

[0018] Its detailed connection means is the technology known in the art, and the following mainly introduces working principle and process, and specific work is as follows.

[0019] By adding multiple reinforcing ribs on the inner circumference of the steel shell and adding reinforcing plates on the inner side of the reinforcing ribs, a multi-layer reinforcing structure is formed. When facing the pressure changes generated inside during the charging and discharging process of the battery (such as gas pressure fluctuations caused by chemical reactions and stress generated by electrode volume changes) and external mechanical impact forces (such as electronic device falling, jolt and vibration during vehicle driving, etc.), the reinforcing ribs and reinforcing plates can work together to effectively disperse stress and avoid stress concentration in local areas of the steel shell. The overall stress of the steel shell is more uniform, greatly enhancing the steel shell's ability to resist deformation and reducing the occurrence of deformation such as local indentation, swelling, rupture, etc. to ensure that the internal components of the battery are always in a stable space environment, ensuring the normal operation and service life of the battery. Compared with the existing ordinary steel shell structure, the maximum deformation of the steel shell of the utility model can be reduced by more than [X] % under the same stress conditions, and the structural stability is significantly improved.

[0020] Heat-conducting rods are arranged on the inner side of the reinforcing plate and the steel shell, which are made of materials with high thermal conductivity (such as copper, aluminum, etc.), which can quickly conduct the heat accumulated inside the steel shell during battery operation. These heat-conducting rods are in close contact with the inner wall of the steel shell, the reinforcing plate, etc., forming a high-efficiency heat conduction network to ensure that heat does not accumulate locally inside the steel shell and cause excessive temperature. At the same time, the graphite heat dissipation stickers arranged on the outer wall of the steel shell further enhance the heat dissipation effect, which can quickly dissipate heat to the external environment due to its large heat conduction area and good heat transfer performance. Through this internal and external combined heat management method, the temperature of the steel shell can be effectively controlled under high-rate charging and discharging or long-term continuous use conditions, etc. For example, under the same charging and discharging conditions, the maximum temperature of the steel shell structure of the utility model can be reduced by about [X] °C compared with the traditional steel shell structure, avoiding problems such as the mechanical properties of the steel shell material decreasing due to high temperature, the chemical reaction inside the battery being unbalanced, etc., maintaining the stability of the battery performance, prolonging the overall service life of the battery, and helping to improve the use safety of the battery in high-temperature environments.

[0021] A fire-resistant buffer cotton is arranged on the inner side of the steel shell, which is made of materials with good fire resistance and buffering performance (such as ceramic fiber cotton, etc.). In the event of abnormal heating or even thermal runaway of the battery, the fire-resistant buffer cotton can play an excellent heat insulation role, delaying the rapid transfer of heat to the steel shell wall and the outside, giving more time for appropriate safety measures to be taken, reducing the risk of serious consequences caused by thermal runaway. Moreover, when the battery is subjected to external mechanical actions such as vibration and impact during daily use, the fire-resistant buffer cotton also acts as a buffer layer to effectively absorb the impact force between the internal components such as the electrode and the steel shell, avoiding damage to the steel shell due to hard impact, further protecting the integrity and stability of the steel shell, improving the overall safety of the battery, and reducing the probability of safety accidents caused by battery failure.

[0022] The steel shell structure of the utility model improves the performance of the battery steel shell in stress, heat dissipation and safety protection and the like through the synergistic effect of the above-mentioned multiple innovative designs, so that it can better adapt to the complex working condition requirements of modern high-performance and high-safety battery applications. Compared with some existing improvement methods that simply rely on replacing high-cost high-strength materials or adding complex heat dissipation devices at the battery module level, the utility model realizes significant performance improvement without significantly increasing material cost and manufacturing process complexity, helps to control the production cost of the battery, improves the market competitiveness of the product, has good economic benefits and practical value on the basis of ensuring the performance and stability of the battery.

[0023] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "coaxial", "bottom", "one end", "top", "central position", "the other end", "upper", "one side", "top end", "inner", "front", "central", "both ends" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation; at the same time, unless otherwise explicitly specified and limited, the terms "clamping", "inserting", "welding", "mounting", "setting", "interference fit", "screw connection", "pin shaft connection" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements, unless otherwise explicitly limited, and those skilled in the art can understand the specific meaning of the above-mentioned terms in the utility model according to the specific situation.

[0024] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A high-stability cylindrical battery steel can structure comprising a first can (1), characterized in that: The upper and lower ends of the first shell (1) are respectively provided with a second shell (2) and a third shell (3), the inner cavity of the first shell (1) is provided with a reinforcing rib (4), the inner side of the reinforcing rib (4) is provided with a reinforcing plate (5), one end of a plurality of heat-conducting rods (6) is mounted on the outer wall of the reinforcing plate (5), and the other end of the heat-conducting rod (6) is fixedly connected to the inner wall of the first shell (1), and the inner side of the first shell (1) and the reinforcing plate (5) is filled with fire-resistant buffer cotton (7).

2. The high-stability cylindrical battery steel can structure according to claim 1, characterized by: The outer walls of the first shell (1), the second shell (2) and the third shell (3) are all provided with graphite heat dissipation stickers (8).

3. The high-stability cylindrical battery steel can structure according to claim 1, characterized in that: The number of the reinforcing ribs (4) is several, and the spacing between every two adjacent reinforcing ribs (4) is 0.5 cm.

Images