Finned heat sink battery pack structure

Abstract

The utility model discloses a fin radiating battery package structure, including tray frame, the electric core is stacked on tray frame, the top of electric core covers the upper cover, is provided with fin plate in tray frame, and the bottom of electric core is bonded with the upper surface of fin plate through heat conduction structure glue, and the inboard of upper cover is provided with heat conduction pressing block to the top position of every electric core, and the bottom surface of heat conduction pressing block is bonded with the top of electric core through heat conduction structure glue, and the both sides of tray frame are provided with end plate, and the inboard of end plate and the lateral surface of electric core are provided with elastic heat conduction gasket, and the upper and lower sides of tray frame all are provided with fan, and the air outlet direction of fan is perpendicular with the extension direction of fin, the utility model discloses through top heat conduction pressing block and bottom fin plate construction cooperation radiating system, significantly reduce vertical temperature difference, promote heat consistency, and elastic heat conduction gasket and damping structure effectively buffer electric core expansion stress, avoid structural damage, and partition fin and upper and lower fan optimize radiating efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of energy storage batteries, specifically to a finned heat dissipation battery pack structure. Background Technology

[0002] As the energy density and charge / discharge rate of power battery packs continue to improve, the heat generated during their operation also increases significantly. Effective thermal management is key to ensuring the safety, lifespan, and performance of battery packs.

[0003] Existing battery pack heat dissipation structures mostly adopt the approach of setting heat dissipation plates or cooling channels at the bottom of the battery module. For example, a common existing technology is to integrate a liquid cooling plate in the battery pack tray and remove heat through the circulation of coolant. Another common approach is to set heat dissipation fins at the bottom of the tray and use an external fan for forced air cooling. These approaches improve the heat dissipation performance of the battery pack to some extent.

[0004] However, existing finned heat dissipation battery pack structures still have significant drawbacks. Current technologies generally focus on heat dissipation at the bottom of the battery, while the top of the battery relies solely on natural convection with the top cover or simple thermally conductive adhesive for heat transfer. This results in a severely insufficient heat dissipation path, leading to a significant vertical temperature difference between the bottom and top of the battery pack during operation, which affects the consistency and lifespan of the battery pack. To cope with the cyclic expansion of the cells during charging and discharging, the battery pack needs to have restraint structures such as end plates. Current designs typically treat the end plates only as structural components, and the stress generated between rigid restraint and cell expansion cannot be effectively buffered and dispersed, posing a risk of cell damage under long-term use. Utility Model Content

[0005] The purpose of this invention is to provide a finned heat dissipation battery pack structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a finned heat dissipation battery pack structure, including a tray frame, on which battery cells are stacked, the top of the battery cells is covered with a top cover, a finned plate is disposed inside the tray frame, and the bottom of the battery cells is bonded to the upper surface of the finned plate by a thermally conductive structural adhesive. The inner side of the top cover is provided with a heat-conducting pressure block corresponding to the top position of each battery cell. The bottom surface of the heat-conducting pressure block is bonded to the top of the battery cell by a heat-conducting structural adhesive. End plates are provided on both sides of the tray frame. An elastic heat-conducting pad is provided between the inner side of the end plate and the side of the battery cell. The fin plate includes straight fins and serrated fins. Fans are provided on both the upper and lower sides of the tray frame, and the air outlet direction of the fans is perpendicular to the extension direction of the fins.

[0007] Preferably, an arc groove is formed between the side wall of the battery cell and the side wall of the top cover, and the arc groove is filled with an elastic damping structure.

[0008] Preferably, the serrated fins are concentrated in the middle position below the high-heat zone of the corresponding battery cell, and the straight fins are arranged on both sides below the low-heat zone of the corresponding battery cell.

[0009] Preferably, the elastic thermally conductive pad is a silicone rubber pad doped with boron nitride filler, and the contact surface of the elastic thermally conductive pad facing the battery cell is a plane.

[0010] Preferably, the heat-conducting pressure block is made of aluminum alloy, and the top of the heat-conducting pressure block penetrates through the upper cover and is integrally formed with the upper cover.

[0011] Preferably, the pallet frame is composed of a front beam, a rear beam, a left beam, and a right beam, which are spliced ​​and welded together.

[0012] Preferably, the end plate is an aluminum profile and is integrally formed with the left and right beams of the pallet frame.

[0013] Compared with the prior art, the beneficial effects of this utility model are: This invention integrates a thermally conductive pressure block with the top cover and bonds it to the top of the battery cell, creating an efficient top active heat dissipation channel. This channel works in synergy with the bottom finned plate heat dissipation, significantly reducing the vertical temperature difference of the battery pack and improving thermal uniformity. The elastic thermally conductive pad and wave-shaped structure design effectively buffer the cyclic expansion stress of the battery cell, avoiding the risk of damage caused by rigid restraint. Combined with the partitioned arrangement of serrated and straight fins and the upper and lower convection fans, balanced heat dissipation is achieved. The elastic damping structure in the arc groove further provides vibration and stress buffering. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the finned heat dissipation battery pack of this utility model.

[0015] Figure 2 This is a schematic diagram of the structure of the battery cell of this utility model.

[0016] Figure 3 This is a schematic diagram of the structure of the tray fin plate of this utility model.

[0017] Figure 4 This is a schematic diagram of the inner side of the top cover of this utility model.

[0018] In the diagram: 1-Tray frame; 2-Battery cell; 3-Top cover; 31-Heat-conducting pressure block; 32-Circular arc groove; 33-Elastic damping structure; 4-Fan; 5-Fin plate; 51-Straight fin; 52-Serrated fin; 6-End plate; 7-Elastic heat-conducting pad. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1 This utility model provides a technical solution: The finned heat dissipation battery pack structure provided in this embodiment includes a tray frame 1. The tray frame 1 serves as the basic support structure of the battery pack and is composed of a front beam, a rear beam, a left beam, and a right beam assembled by welding, which is beneficial to the overall rigidity and stability.

[0021] like Figure 2 and Figure 3 As shown, battery cells 2 are stacked on the tray frame 1, and the top of the battery cells 2 is covered by a cover 3. A finned plate 5 is provided inside the tray frame 1. The finned plate 5 is fixed to the bottom inner surface of the tray frame 1 by welding, forming the main heat dissipation base of the battery pack. The bottom of the battery cells 2 is bonded to the upper surface of the finned plate 5 by thermally conductive structural adhesive, thereby efficiently conducting the large amount of heat generated by the battery cells during operation to the finned plate 5 for diffusion.

[0022] like Figure 4 As shown, a heat-conducting pressure block 31 is provided on the inner side of the upper cover 3 corresponding to the top position of the battery cell 2. The heat-conducting pressure block 31 is made of aluminum alloy and has good thermal conductivity. The top of the heat-conducting pressure block 31 penetrates through the upper cover 3 and is connected to the upper cover 3 through an integral molding structure to ensure mechanical strength and the continuity of the heat conduction path.

[0023] The bottom surface of the thermally conductive pressure block 31 is bonded and fixed to the top of the battery cell 2 with thermally conductive structural adhesive to form a top heat dissipation channel, which effectively makes up for the defect of insufficient heat dissipation at the top of the battery in the prior art, reduces the vertical temperature difference of the battery pack during operation, and improves the consistency and life of the battery pack.

[0024] like Figure 1 and Figure 3 As shown, end plates 6 are provided on both sides of the tray frame 1. The end plates 6 are made of aluminum profiles and are connected to the left and right beams of the tray frame 1 through an integral molding structure. An elastic thermally conductive pad 7 is bonded between the inner side of the end plate 6 and the side of the battery cell 2. The elastic thermally conductive pad 7 is a silicone rubber pad doped with boron nitride filler. Its contact surface facing the battery cell 2 is flat. It contacts the side of the battery cell 2 by pressing. The elastic thermally conductive pad 7 has a wavy structure. The elastic thermally conductive pad 7 can not only buffer the cyclic expansion stress during the charging and discharging process of the battery cell and avoid damage to the battery cell caused by rigid restraint, but also has good thermal conductivity and assists in lateral heat diffusion.

[0025] like Figure 3 As shown, the finned plate 5 includes straight fins 51 and serrated fins 52. The serrated fins 52 are concentrated in the middle position below the high-heat area of ​​the corresponding cell 2, which improves local heat dissipation efficiency by enhancing turbulence and heat dissipation area. The straight fins 51 are located on both sides below the low-heat area of ​​the corresponding cell 2, providing uniform airflow and heat dissipation. This partitioned design optimizes heat dissipation distribution and reduces hot spot formation.

[0026] like Figure 1 As shown, fans 4 are provided on both the upper and lower sides of the tray frame 1. The fans 4 are fixedly connected to the frame of the tray frame 1 by bolts. Their air outlet direction is perpendicular to the extension direction of the fins, forcing air convection through the gaps between the fins to improve the overall heat dissipation performance. The upper and lower fans work together to further balance the vertical temperature gradient of the battery pack.

[0027] like Figure 4 As shown, an arc groove 32 is provided between the side wall of the battery cell 2 and the side wall of the top cover 3. An elastic damping structure 33 is filled in the arc groove 32. The elastic damping structure 33 is fixed in the arc groove 32 by pressing. It is used to absorb the stress generated by the expansion and vibration of the battery cell, provide additional buffer protection, and prevent the battery cell from being damaged by mechanical stress during long-term use.

[0028] 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 finned heat dissipation battery pack structure, comprising a tray frame (1), characterized in that: The tray frame (1) has stacked battery cells (2), the top of the battery cells (2) is covered with a cover (3), the tray frame (1) has a finned plate (5), and the bottom of the battery cells (2) is bonded to the upper surface of the finned plate (5) by thermally conductive structural adhesive. The inner side of the top cover (3) is provided with a heat-conducting pressure block (31) corresponding to the top position of each battery cell (2). The bottom surface of the heat-conducting pressure block (31) is bonded to the top of the battery cell (2) by a heat-conducting structural adhesive. The two sides of the tray frame (1) are provided with end plates (6). An elastic heat-conducting pad (7) is provided between the inner side of the end plate (6) and the side of the battery cell (2). The fin plate (5) includes straight fins (51) and serrated fins (52). Fans (4) are provided on both the upper and lower sides of the tray frame (1), and the air outlet direction of the fans (4) is perpendicular to the extension direction of the fins.

2. The finned heat dissipation battery pack structure according to claim 1, characterized in that: An arc groove (32) is provided between the side wall of the battery cell (2) and the side wall of the top cover (3), and the arc groove (32) is filled with an elastic damping structure (33).

3. The finned heat dissipation battery pack structure according to claim 1, characterized in that: The serrated fins (52) are concentrated in the middle position below the high heat zone of the corresponding cell (2), and the straight fins (51) are located on both sides below the low heat zone of the corresponding cell (2).

4. The finned heat dissipation battery pack structure according to claim 1, characterized in that: The elastic thermally conductive pad (7) is a silicone rubber pad doped with boron nitride filler, and the contact surface of the elastic thermally conductive pad (7) facing the battery cell (2) is a plane.

5. The finned heat dissipation battery pack structure according to claim 1, characterized in that: The heat-conducting pressure block (31) is made of aluminum alloy. The top of the heat-conducting pressure block (31) penetrates through the top cover (3) and is integrally formed with the top cover (3).

6. The finned heat dissipation battery pack structure according to claim 1, characterized in that: The pallet frame (1) is composed of a front beam, a rear beam, a left beam, and a right beam, which are spliced ​​and welded together.

7. The finned heat dissipation battery pack structure according to claim 1, characterized in that: The end plate (6) is an aluminum profile and is integrally formed with the left and right beams of the pallet frame (1).

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