A lithium battery pack that facilitates heat dissipation

Abstract

This utility model relates to the field of lithium battery pack technology and discloses a lithium battery pack with convenient heat dissipation. It includes a shell with a top cover fixedly connected to the top of the shell. Annular fixing frames are embedded in the opposite side walls of the shell. Adjustable airflow heat dissipation components are provided inside the two annular fixing frames. Installation grooves are provided on the inner side walls of the annular fixing frames. By changing the opening degree of the air inlet or outlet of the heat dissipation components, the airflow speed and volume are controlled. Furthermore, heat dissipation components are symmetrically arranged on both sides of the shell, forming a convection circulation. The heat dissipation effect is superior to traditional single-sided heat dissipation structures. The heat dissipation efficiency is dynamically adjusted according to actual needs to avoid overheating or underheating, ensuring the battery operates within the optimal temperature range and significantly extending its service life.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery pack technology, specifically to a lithium battery pack that facilitates heat dissipation. Background Technology

[0002] With the rapid development of new energy vehicles, energy storage systems, and outdoor electronic devices, lithium battery packs, as core power sources, directly affect battery performance, safety, and lifespan due to the stability of their operating temperature. Studies have shown that lithium batteries maintain optimal charge and discharge efficiency within the range of 25℃ to 40℃. However, excessively high temperatures (>45℃) accelerate electrolyte decomposition and separator shrinkage, leading to capacity decay and even thermal runaway. Conversely, excessively low temperatures (<0℃) induce lithium dendrite growth, increasing internal resistance and shortening cycle life.

[0003] Existing devices have some drawbacks during use. For example, most existing heat dissipation components use grilles or fans with fixed opening and closing degrees, which cannot dynamically adjust the heat dissipation efficiency according to the real-time battery temperature, charging and discharging power, or environmental conditions (such as high temperature / low temperature conditions). For example, continuous forced heat dissipation in low temperature environments will exacerbate the drop in battery temperature, triggering the low temperature protection mechanism and limiting the charging and discharging power. If the heat dissipation is insufficient during high temperature fast charging, it may cause thermal runaway. Utility Model Content

[0004] The purpose of this invention is to provide a lithium battery pack that facilitates heat dissipation, solving the problem that most heat dissipation components use grilles or fans with fixed opening degrees, which cannot dynamically adjust the heat dissipation efficiency according to the real-time battery temperature, charging and discharging power, or environmental conditions (such as high temperature / low temperature conditions).

[0005] This utility model provides the following technical solution: a lithium battery pack that facilitates heat dissipation, including a shell, a top cover fixedly connected to the top of the shell, and annular fixing frames embedded on the opposite side walls of the shell. A heat dissipation component with adjustable airflow is provided inside the two annular fixing frames, and an installation groove is provided on the inner side wall of the annular fixing frame.

[0006] As a preferred embodiment of the above technical solution, the heat dissipation component includes an annular mounting frame. Multiple load-bearing plates are fixed in an annular array on the outer arc surface of the annular mounting frame. The ends of the multiple load-bearing plates away from the annular mounting frame are fixed to the inner sidewall of the annular fixed frame. Multiple guide pulleys are also fixed in an annular array on the outer arc surface of the annular mounting frame. An annular rotating frame is sleeved on the outer side of the multiple guide pulleys. A limiting groove adapted to the guide pulleys is opened on the inner arc surface of the annular rotating frame.

[0007] As a preferred embodiment of the above technical solution, the heat dissipation assembly further includes multiple load-bearing rods fixed to the side wall of the annular mounting frame and multiple limiting posts fixed to the outer arc surface of the annular rotating frame. The ends of the multiple load-bearing rods away from the annular mounting frame are fixedly connected to a central post. Multiple rotating rods are arranged in annular array on the outer arc surface of the central post. Opening and closing blades are sleeved on the outer walls of the multiple rotating rods. The ends of the multiple rotating rods pass through the side wall of the annular mounting frame and are fixedly connected to a limiting slide frame. The multiple limiting posts are inserted into the sliding openings of the limiting slide frame. A driving assembly for driving the opening and closing of the opening and closing blades is provided on the side wall of the annular rotating frame.

[0008] As a preferred embodiment of the above technical solution, the driving assembly includes a driving motor fixed in the mounting groove, the output end of the driving motor is fixedly connected to a driving shaft, the end of the driving shaft is fixedly sleeved with a driving gear, and an arc-shaped rack is fixedly connected to the outer wall of the annular rotating frame, and the driving gear meshes with the arc-shaped rack for transmission.

[0009] As a preferred embodiment of the above technical solution, the ends of the limiting posts that are away from the rotating frame are all fixedly connected with anti-detachment blocks.

[0010] As a preferred embodiment of the above technical solution, a carrying handle is hinged to the upper end face of the top cover.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] In this invention, the airflow speed and air volume are controlled by changing the opening degree of the air inlet or outlet of the heat dissipation component. Heat dissipation components are symmetrically arranged on both sides of the outer shell to form a convection circulation. The heat dissipation effect is better than the traditional single-sided heat dissipation structure. The heat dissipation efficiency is dynamically adjusted according to actual needs to avoid excessive or insufficient heat dissipation, ensuring that the battery works within the optimal temperature range and significantly extending its service life. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a lithium battery pack that facilitates heat dissipation.

[0014] Figure 2 This is a partial structural diagram of the heat dissipation component;

[0015] Figure 3 A schematic diagram of the connection structure between the heat dissipation component and the drive component;

[0016] Figure 4 This is an enlarged schematic diagram of the rotating ring structure.

[0017] In the diagram: 1. Outer shell; 11. Top cover; 111. Handle; 12. Annular fixing frame; 121. Mounting groove; 2. Heat dissipation assembly; 21. Annular mounting frame; 22. Load-bearing plate; 23. Guide pulley; 24. Annular rotating frame; 25. Limiting slide; 26. Load-bearing bar; 27. Limiting post; 271. Anti-detachment block; 28. Center post; 29. ​​Rotating rod; 291. Opening and closing blade; 292. Limiting slide; 3. Drive assembly; 31. Drive motor; 32. Drive shaft; 33. Drive gear; 34. Arc-shaped rack. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0019] Example

[0020] like Figures 1-4 As shown, this utility model provides a technical solution: a lithium battery pack with easy heat dissipation, including a shell 1, a top cover 11 fixedly connected to the top of the shell 1, and annular fixing frames 12 embedded on the opposite side walls of the shell 1. An adjustable airflow heat dissipation component 2 is provided inside each of the two annular fixing frames 12. An installation groove 121 is provided on the inner side wall of the annular fixing frame 12. A handle 111 is hinged to the upper surface of the top cover 11. In actual use, the airflow speed and airflow volume are controlled by changing the opening degree of the air inlet or outlet of the heat dissipation component 2. Since the heat dissipation components 2 are symmetrically arranged on both sides of the shell 1, a convection circulation is formed, resulting in a better heat dissipation effect than the traditional single-sided heat dissipation structure. The heat dissipation efficiency is dynamically adjusted according to actual needs to avoid excessive or insufficient heat dissipation, ensuring that the battery operates within the optimal temperature range and significantly extending its service life.

[0021] As one implementation method in this embodiment, such as Figure 3As shown, the heat dissipation assembly 2 includes an annular mounting frame 21. Multiple load-bearing plates 22 are fixed in a circular array on the outer arc-shaped surface of the annular mounting frame 21. The ends of the multiple load-bearing plates 22 away from the annular mounting frame 21 are fixed to the inner sidewall of the annular fixed frame 12. Multiple guide pulleys 23 are also fixed in a circular array on the outer arc-shaped surface of the annular mounting frame 21. An annular rotating frame 24 is sleeved on the outer side of the multiple guide pulleys 23. A limiting groove 25 adapted to the guide pulleys 23 is opened on the inner arc-shaped surface of the annular rotating frame 24. The guide pulleys 23 cooperate with the limiting groove 25 of the annular rotating frame 24 to achieve smooth rotation of the rotating frame and limit its axial displacement. The heat dissipation assembly 2 also includes multiple load-bearing rods 26 fixed to the sidewall of the annular mounting frame 21 and multiple limiting posts 27 fixed to the outer arc-shaped surface of the annular rotating frame 24. A central post 28 is fixedly connected to the ends of the multiple load-bearing rods 26 away from the annular mounting frame 21. The outer arc-shaped surface of the central post 28... The annular array has multiple rotating rods 29, each with an opening and closing blade 291 fitted on its outer wall. The ends of the rotating rods 29 pass through the side wall of the annular mounting frame 21 and are fixedly connected to a limiting slide frame 292. Multiple limiting posts 27 are inserted into the sliding opening of the limiting slide frame 292. The ends of the limiting posts 27 away from the rotating frame are fixedly connected to anti-detachment blocks 271. The side wall of the annular rotating frame 24 is provided with a driving assembly 3 for driving the opening and closing of the opening and closing blades 291. In actual use, the driving assembly 3 drives the annular rotating frame 24 to rotate around the central axis. The annular rotating frame 24 drives the limiting posts 27 to move synchronously. When the limiting posts 27 move, they slide within the sliding opening of the limiting slide frame 292 and cause the limiting slide frame 292 to tilt. When the limiting slide frame 292 tilts, it drives the rotating rods 29 to rotate. The rotating rods 29 drive the opening and closing blades 291 to rotate synchronously, thereby realizing the closing and unfolding of the opening and closing blades 291.

[0022] As one implementation method in this embodiment, such as Figure 3 As shown, the drive assembly 3 includes a drive motor 31 fixed in the mounting groove 121. The output end of the drive motor 31 is fixedly connected to a drive shaft 32, and the end of the drive shaft 32 is fixedly sleeved with a drive gear 33. An arc-shaped rack 34 is fixedly connected to the outer wall of the annular rotating frame 24. The drive gear 33 meshes with the arc-shaped rack 34 for transmission. In actual use, the drive motor 31 is controlled to start and stop by an external controller. (It should be noted that the housing 1 is equipped with a built-in temperature sensor to detect the battery temperature. When the temperature exceeds the threshold, the heat dissipation assembly 2 is controlled to open and close to achieve intelligent heat dissipation.) After receiving the signal, the drive motor 31 rotates forward or backward, driving the drive gear 33 to rotate. The drive gear 33 drives the arc-shaped rack 34 to move, thereby driving the annular rotating frame 24 to rotate around the central axis. The annular rotating frame 24 adjusts the angle of the opening and closing blade 291 to the target position through the linkage of the limiting post 27 and the limiting slide frame 292. After the drive motor 31 stops, the blade state can be kept stable.

[0023] Working principle: During use, the drive motor 31 is controlled by an external controller to start and stop. The drive motor 31 rotates forward or backward, driving the drive gear 33 to rotate. The drive gear 33 drives the arc rack 34 to move, which in turn drives the annular rotating frame 24 to rotate around the central axis. The annular rotating frame 24 is linked with the limiting column 27 and the limiting slide frame 292 to adjust the angle of the opening and closing blade 291 to the target position. When the limiting column 27 is located at one end of the limiting slide frame 292, the opening and closing blade 291 is parallel to the airflow direction, and the maximum ventilation area is achieved. When the rotating frame rotates to the middle position, the opening and closing blade 291 is tilted, partially blocking the airflow to adjust the air volume. When the limiting column 27 is located at the other end of the limiting slide frame 292, the opening and closing blade 291 is perpendicular to the airflow direction, and the minimum ventilation area is achieved (dustproof or heat preservation).

[0024] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A lithium battery pack facilitating heat dissipation, comprising a shell (1), a top cover (11) is fixedly connected to a top end of the shell (1), characterized in that: Annular fixing frames (12) are embedded on the opposite side walls of the outer shell (1). An adjustable airflow heat dissipation component (2) is provided on the inner side of the two annular fixing frames (12). An installation groove (121) is provided on the inner side wall of the annular fixing frame (12).

2. The lithium battery pack of claim 1, wherein: The heat dissipation assembly (2) includes an annular mounting frame (21). Multiple load-bearing plates (22) are fixed in an annular array on the outer arc surface of the annular mounting frame (21). The ends of the multiple load-bearing plates (22) away from the annular mounting frame (21) are fixed to the inner sidewall of the annular fixing frame (12). Multiple guide pulleys (23) are also fixed in an annular array on the outer arc surface of the annular mounting frame (21). An annular rotating frame (24) is sleeved on the outer side of the multiple guide pulleys (23). A limiting groove (25) adapted to the guide pulleys (23) is opened on the inner arc surface of the annular rotating frame (24).

3. The lithium battery pack of claim 1, wherein: The heat dissipation assembly (2) also includes multiple load-bearing rods (26) fixed on the side wall of the annular mounting frame (21) and multiple limiting posts (27) fixed on the outer arc surface of the annular rotating frame (24). The ends of the multiple load-bearing rods (26) away from the annular mounting frame (21) are fixedly connected to a central post (28). Multiple rotating rods (29) are arranged in annular array on the outer arc surface of the central post (28). Opening and closing blades (291) are sleeved on the outer wall of the multiple rotating rods (29). The ends of the multiple rotating rods (29) pass through the side wall of the annular mounting frame (21) and are fixedly connected to a limiting slide frame (292). The multiple limiting posts (27) are inserted into the sliding opening of the limiting slide frame (292). A driving assembly (3) for driving the opening and closing of the opening and closing blades (291) is provided on the side wall of the annular rotating frame (24).

4. The lithium battery pack of claim 3, wherein: The drive assembly (3) includes a drive motor (31) fixed in the mounting groove (121). The drive motor (31) has a drive shaft (32) fixedly connected to its output end. A drive gear (33) is fixedly sleeved at the end of the drive shaft (32). An arc-shaped rack (34) is fixedly connected to the outer wall of the annular rotating frame (24). The drive gear (33) meshes with the arc-shaped rack (34) for transmission.

5. The lithium battery pack of claim 3, wherein: The ends of the limiting posts (27) away from the rotating frame are all fixedly connected with anti-detachment blocks (271).

6. The lithium battery pack of claim 1, wherein: A handle (111) is hinged to the upper end face of the top cover (11).

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