A lithium battery pack heat dissipation fin

Abstract

The utility model discloses a lithium battery group heat dissipation fin belongs to lithium battery technical field. Including the connecting seat, the connecting seat is fixed on the surface of lithium battery group through screw, and the top surface of connecting seat is inserted with a plurality of heat dissipation fins, and the surface of heat dissipation fin is equipped with a plurality of sawtooth grooves, and the bottom surface of heat dissipation fin is installed with metal strip, and the surface of metal strip and lithium battery group is contacted, and the inside of metal strip and heat dissipation fin all are equipped with a plurality of intercommunication cavities, and the bottom surface of metal strip is equipped with a plurality of fixed slots, and fixed slot and cavity are communicated, and the inside of fixed slot is installed with copper heat pipe, and the bottom end of copper heat pipe is installed with metal block, and metal block and fixed slot are fixedly connected through heat conduction gum, and the heat of battery group core area is rapidly transmitted to fin main part everywhere through the efficient heat conduction characteristics of copper heat pipe, realizes the even distribution of heat, and avoids the local overheating phenomenon.

Description

Technical Field

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

[0002] With the development of technology, lithium battery packs have been widely used in various electronic devices, electric vehicles, and energy storage systems. However, lithium batteries generate a large amount of heat during charging and discharging. If this heat cannot be dissipated effectively in a timely manner, the temperature of the battery pack will continue to rise. Excessive temperature not only accelerates the chemical reactions inside the battery, leading to capacity decay and shortened lifespan, but may also cause safety hazards, such as thermal runaway or even serious consequences like fire and explosion.

[0003] Currently, common heat dissipation methods for lithium battery packs include air cooling, liquid cooling, and heat pipe cooling. Among these methods, heat sinks, as a fundamental and crucial heat dissipation component, play a key role. Traditional lithium battery pack heat sinks are typically simple sheet-like structures that increase the heat dissipation area to promote heat dissipation to the surrounding environment. However, these conventional heat sinks have the following drawbacks: existing heat sinks are mostly made of a single material, and heat transfer on the fins mainly relies on the material's own thermal conductivity. This often results in heat concentrating in the area in contact with the core heat-generating region of the battery pack, while other areas of the fins receive less heat, making them prone to localized overheating.

[0004] Therefore, developing a new type of heat dissipation fin that can effectively solve the above problems and improve the heat dissipation performance of lithium battery packs has important practical significance and application value. Utility Model Content

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

[0006] In view of the above problems, the technical solution proposed by this utility model is as follows:

[0007] A heat dissipation fin for a lithium battery pack includes a connector fixed to the surface of the lithium battery pack by screws. Several heat dissipation fins are inserted into the top surface of the connector. The surface of each heat dissipation fin has several serrated grooves. A metal strip is mounted on the bottom surface of each heat dissipation fin, and the metal strip contacts the surface of the lithium battery pack. Both the metal strip and the heat dissipation fins have several interconnected cavities. The bottom surface of the metal strip has several fixing grooves that communicate with the cavities. A copper heat pipe is installed inside each fixing groove, and a metal block is mounted at the bottom end of the copper heat pipe. The metal block and the fixing groove are fixedly connected by thermally conductive adhesive. The metal block contacts the surface of the lithium battery pack. The copper heat pipe has high thermal conductivity, allowing it to quickly transfer heat from the core area of ​​the lithium battery pack to all parts of the heat dissipation fins. Combined with the heat diffusion effect of the cavities, this prevents localized overheating. The serrated grooves increase the contact area between the heat dissipation fins and the air, improving heat dissipation efficiency. The metal strip and metal block enhance the fit with the battery pack, ensuring stable heat transfer.

[0008] Furthermore, the copper heat pipe consists of a copper tube, a liquid absorber, and a heat-absorbing medium from the outside to the inside. The liquid absorber is connected to the inner wall of the copper tube, and the inside of the liquid absorber is hollow. The heat-absorbing medium flows inside the liquid absorber and rapidly transfers heat through phase change. The capillary action of the liquid absorber causes the medium to circulate, greatly improving the heat conduction efficiency and making it suitable for the heat dissipation requirements of high-power lithium battery packs.

[0009] Furthermore, the bottom surfaces of the metal strip and the metal block are coated with thermal grease. The thermal grease fills the tiny gaps between the metal strip / block and the surface of the lithium battery pack, reducing contact thermal resistance, ensuring efficient heat transfer, and avoiding heat dissipation bottlenecks caused by poor contact.

[0010] Furthermore, the top surface of the connector has a plurality of first slots evenly distributed, and the bottom surface of the connector has a plurality of second slots evenly distributed. The first slots and the second slots correspond one-to-one and are interconnected. The width of the heat dissipation fins is adapted to the width of the first slots and slides within the first slots. The width of the metal strip is adapted to the width of the second slots and slides within the second slots. The width of the first slot is smaller than the width of the second slot. The slot structure facilitates the quick installation and replacement of the heat dissipation fins and the metal strip. The size difference between the first slots and the second slots can prevent misalignment during installation and ensure the positioning accuracy of the heat dissipation components.

[0011] Furthermore, a fixing block is installed on the side of the metal strip. The width of the fixing block is greater than the width of the second slot, and it is fixed to the side of the connecting seat by screws. The fixing block firmly fixes the metal strip and heat dissipation fins to the connecting seat, avoiding loosening caused by vibration and ensuring the stability of the heat dissipation structure during long-term use.

[0012] Furthermore, the bottom surface of the connector is provided with four sets of connecting holes for screws to pass through, and the top surface of the connector is provided with four sets of countersunk holes for placing screw heads. The connecting holes and countersunk holes are connected, and the connecting holes and countersunk holes cooperate to achieve a stable fixation between the connector and the lithium battery pack. The countersunk holes hide the screw heads, preventing the protruding structure from interfering with other components, while protecting the screws from collision damage.

[0013] Furthermore, the heat dissipation fins are made of thermally conductive metal, which has a high thermal conductivity and can quickly transfer heat and dissipate it through the fin surface. Together with the cavity and copper heat pipe, they form an efficient heat dissipation path.

[0014] Compared with the prior art, the beneficial effects of this utility model are: the heat dissipation fins of the lithium battery pack and the copper heat pipe have high thermal conductivity, which can quickly transfer the heat of the core area of ​​the lithium battery pack to all parts of the heat dissipation fins. Combined with the heat diffusion effect of the cavity, local overheating is avoided; the serrated groove increases the contact area between the heat dissipation fins and the air, improving the heat dissipation efficiency; the metal strips and metal blocks enhance the fit with the battery pack, ensuring stable heat transfer. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the heat dissipation fins of the lithium battery pack disclosed in an embodiment of the present utility model;

[0016] Figure 2 This is a three-dimensional structural diagram of the heat dissipation fins of the lithium battery pack disclosed in an embodiment of the present utility model;

[0017] Figure 3 for Figure 2 Enlarged schematic diagram of structure A in the middle;

[0018] Figure 4 This is a bottom view of the heat dissipation fins of the lithium battery pack disclosed in an embodiment of the present utility model;

[0019] Figure 5 This is a cross-sectional structural diagram of the heat dissipation fins of the lithium battery pack disclosed in an embodiment of this utility model.

[0020] In the diagram: 1. Connecting seat; 2. Connecting hole; 3. Countersunk hole; 4. First slot; 5. Second slot; 6. Heat dissipation fins; 7. Fixing block; 8. Metal strip; 9. Cavity; 10. Fixing groove; 11. Metal block; 12. Copper tube; 13. Liquid absorber; 14. Heat absorption medium; 15. Serrated groove. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1-5 This utility model provides a technical solution: a heat dissipation fin for a lithium battery pack, including a connecting seat 1, which is fixed to the surface of the lithium battery pack by screws. Several heat dissipation fins 6 are inserted into the top surface of the connecting seat 1. Several serrated grooves 15 are provided on the surface of the heat dissipation fins 6. A metal strip 8 is installed on the bottom surface of the heat dissipation fins 6, and the metal strip 8 contacts the surface of the lithium battery pack. Several interconnected cavities 9 are opened inside both the metal strip 8 and the heat dissipation fins 6. Several fixing grooves 10 are provided on the bottom surface of the metal strip 8. The cavity 9 is connected to the fixed groove 10. A copper heat pipe is installed inside the fixed groove 10. A metal block 11 is installed at the bottom of the copper heat pipe. The metal block 11 and the fixed groove 10 are fixedly connected by thermal adhesive. The metal block 11 is in contact with the surface of the lithium battery pack. The heat generated by the lithium battery pack is transferred to the copper heat pipe through the metal block 11. The copper heat pipe conducts the heat into the metal strip 8 and the heat dissipation fins 6. The cavity 9 accelerates the diffusion of heat in the fins. The serrated groove 15 dissipates the heat into the air through convection and radiation to achieve uniform heat dissipation.

[0023] Specifically, for lithium battery packs that do not have pre-drilled holes, the metal strip 8 can be fixed to it using thermally conductive adhesive.

[0024] As an embodiment of this utility model, the copper heat pipe consists of a copper pipe 12, a liquid absorber 13, and a heat-absorbing medium 14 from the outside to the inside. The liquid absorber 13 is connected to the inner wall of the copper pipe 12. The inside of the liquid absorber 13 is hollow. The heat-absorbing medium 14 flows inside the liquid absorber 13. The heat absorbed by the metal block 11 causes the heat-absorbing medium 14 to evaporate. The vapor rises along the copper pipe 12 to the heat dissipation fins 6 and condenses to release heat. The liquid medium flows back to the metal block 11 through the capillary force of the liquid absorber 13, forming a circulating heat dissipation.

[0025] As an embodiment of this utility model, the bottom surfaces of both the metal strip 8 and the metal block 11 are coated with thermal grease. The thermal grease has a high thermal conductivity and its fluidity can fill the unevenness of the contact surface, allowing heat to be directly transferred from the surface of the battery pack to the metal parts, reducing heat loss in the gaps.

[0026] As an embodiment of this utility model, further, the top surface of the connecting seat 1 has a plurality of first slots 4 evenly distributed, and the bottom surface of the connecting seat 1 has a plurality of second slots 5 evenly distributed. The first slots 4 and the second slots 5 correspond one-to-one and are interconnected. The width of the heat dissipation fins 6 is adapted to the width of the first slots 4 and slides within the first slots 4. The width of the metal strip 8 is adapted to the width of the second slots 5 and slides within the second slots 5. The width of the first slots 4 is smaller than the width of the second slots 5. The heat dissipation fins 6 are inserted into the first slots 4, and the metal strip 8 is correspondingly inserted into the second slots 5. The two are precisely connected by the guiding effect of the slots to ensure that the metal strip 8 is in close contact with the surface of the battery pack. The heat dissipation fins 6 remain vertical to maximize the heat dissipation area.

[0027] As an embodiment of this utility model, a fixing block 7 is further installed on the side of the metal strip 8. The width of the fixing block 7 is greater than the width of the second slot 5, and it is fixed to the side of the connecting seat 1 by screws. After the metal strip 8 is inserted into the second slot 5, the fixing block 7 fits against the side of the connecting seat 1, and the screw passes through the fixing block 7 to lock it, thereby restricting the displacement of the metal strip 8 and the heat dissipation fins 6 by mechanical force.

[0028] As an embodiment of this utility model, the bottom surface of the connector 1 is provided with four sets of connecting holes 2 for screws to pass through, and the top surface of the connector 1 is provided with four sets of countersunk holes 3 for placing screw heads. The connecting holes 2 and the countersunk holes 3 are connected. The screw passes through the connecting holes 2 and is screwed into the mounting hole of the lithium battery pack. The screw head sinks into the countersunk hole 3, making the top surface of the connector 1 flat and ensuring that the installation of the heat dissipation fins 6 is not obstructed.

[0029] As an embodiment of this utility model, the heat dissipation fins 6 are further made of thermally conductive metal. The metal heat dissipation fins 6 evenly distribute the heat transferred by the copper heat pipe to the entire fin, and exchange heat with the air through the serrated grooves 15 to achieve rapid heat dissipation.

[0030] It should be noted that all standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art.

Claims

1. A heat dissipation fin for a lithium battery pack, characterized in that, The device includes a connector (1), which is fixed to the surface of the lithium battery pack by screws. Several heat dissipation fins (6) are inserted into the top surface of the connector (1). Several serrated grooves (15) are provided on the surface of the heat dissipation fins (6). A metal strip (8) is installed on the bottom surface of the heat dissipation fins (6). The metal strip (8) is in contact with the surface of the lithium battery pack. Several interconnected cavities (9) are opened inside the metal strip (8) and the heat dissipation fins (6). Several fixing grooves (10) are provided on the bottom surface of the metal strip (8). The fixing grooves (10) are connected to the cavities (9). A copper heat pipe is installed inside the fixing groove (10). A metal block (11) is installed at the bottom end of the copper heat pipe. The metal block (11) and the fixing groove (10) are fixedly connected by thermal adhesive. The metal block (11) is in contact with the surface of the lithium battery pack.

2. The heat dissipation fins for a lithium battery pack according to claim 1, characterized in that, The copper heat pipe consists of a copper tube (12), a liquid absorber (13), and a heat-absorbing medium (14) from the outside to the inside. The liquid absorber (13) is connected to the inner wall of the copper tube (12). The inside of the liquid absorber (13) is hollow. The heat-absorbing medium (14) flows inside the liquid absorber (13).

3. A heat dissipation fin for a lithium battery pack according to claim 1, characterized in that, The bottom surfaces of both the metal strip (8) and the metal block (11) are coated with thermal grease.

4. A heat dissipation fin for a lithium battery pack according to claim 1, characterized in that, The top surface of the connector (1) is provided with a plurality of first slots (4) at equal intervals, and the bottom surface of the connector (1) is provided with a plurality of second slots (5) at equal intervals. The first slots (4) and the second slots (5) correspond one to one and are connected to each other. The width of the heat dissipation fin (6) is matched with that of the first slot (4) and slides in the first slot (4). The width of the metal strip (8) is matched with that of the second slot (5) and slides in the second slot (5). The width of the first slot (4) is smaller than that of the second slot (5).

5. A heat dissipation fin for a lithium battery pack according to claim 4, characterized in that, A fixing block (7) is installed on the side of the metal strip (8). The width of the fixing block (7) is greater than the width of the second slot (5), and it is fixed to the side of the connecting seat (1) by screws.

6. A heat dissipation fin for a lithium battery pack according to claim 1, characterized in that, The bottom surface of the connector (1) is provided with four sets of connecting holes (2) for screws to pass through, and the top surface of the connector (1) is provided with four sets of countersunk holes (3) for placing screw heads, and the connecting holes (2) and countersunk holes (3) are connected.

7. A heat dissipation fin for a lithium battery pack according to claim 1, characterized in that, The heat dissipation fins (6) are made of thermally conductive metal.

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