Heat dissipation air duct and energy storage battery pack

Abstract

The utility model belongs to the technical field of energy storage battery discloses a kind of heat dissipation air flue, including main air flue, the baffle one is arranged in the ventilation cavity of main air flue, to be separated into multiple ventilation units with ventilation cavity;The first end of main air flue is provided with air guide piece one, the second end of main air flue is provided with air guide piece two, in the direction from the first end to the second end of main air flue, the air guide piece one is in condensation structure, the air guide piece two is in diffusion structure.The utility model passes through optimizing main air flue structure, effectively improves the heat dissipation efficiency, and effectively ensures structural stability.The utility model further discloses a kind of energy storage battery pack with the heat dissipation air flue described above.

Description

Technical Field

[0001] This utility model belongs to the field of energy storage battery technology, and in particular relates to a heat dissipation duct and an energy storage battery pack. Background Technology

[0002] As energy storage batteries develop towards higher capacity and higher integration, battery modules composed of multiple cells connected in series or parallel will generate a lot of heat during charging and discharging. If the heat cannot be dissipated in time, it can easily lead to excessively high local temperatures in the cells, causing the risk of thermal runaway.

[0003] Currently, traditional heat dissipation structures often suffer from low airflow exchange efficiency, and the structure of heat dissipation ducts is also difficult to balance lightweight and structural strength. Therefore, current heat dissipation structures are not reliable enough for the heat dissipation of energy storage batteries. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model discloses a heat dissipation duct. By optimizing the main duct structure, it effectively improves heat dissipation efficiency and ensures structural stability. This utility model also discloses an energy storage battery pack incorporating the aforementioned heat dissipation duct.

[0005] The specific technical solution of this utility model is as follows: A heat dissipation air duct includes a main air duct, wherein a partition is provided in the ventilation cavity of the main air duct to divide the ventilation cavity into multiple ventilation units; The first end of the main air duct is provided with an air guide component one, and the second end of the main air duct is provided with an air guide component two. In the direction from the first end to the second end of the main air duct, the air guide component one has a condensation structure, and the air guide component two has a diffusion structure.

[0006] The partition can separate the main air duct, thereby transforming the main air duct into a structure that integrates multiple ventilation units. Compared to a complete main air duct, it can effectively increase the airflow velocity. The partition can also serve as a structural reinforcement for the main air duct, thereby simultaneously improving the overall structural strength of the main air duct.

[0007] Preferably, the partition one includes at least one longitudinal partition one and / or at least one transverse partition one; The air guide component one and the air guide component two are provided with a partition two, and the partition two is provided in correspondence with the partition one.

[0008] Both the longitudinal diaphragm and the transverse diaphragm can separate the main air duct and effectively improve the structural strength of the main air duct.

[0009] Preferably, the contraction angle of the first air guide is 15° to 30°, and the diffusion angle of the second air guide is 15° to 30°.

[0010] This structure enables the air guide component one to smoothly guide the external airflow into the ventilation cavity and smoothly guide the airflow in the ventilation cavity to the air guide component two, thereby avoiding the generation of airflow eddies, reducing aerodynamic noise, and improving airflow circulation efficiency.

[0011] Preferably, on a cross section perpendicular to the main air duct and along its first to second ends, the maximum area of ​​both the first and second air guides is not less than 1.5 times the area of ​​the ventilation cavity.

[0012] When the maximum area of ​​both the first and second air guides is not less than 1.5 times the area of ​​the ventilation cavity in a cross section perpendicular to the main air duct and along the direction from the first end to the second end, the local resistance during airflow entry / exit can be effectively reduced.

[0013] Preferably, the first air guide and the second air guide are detachably connected to the main air duct.

[0014] The structure is simple and can be easily assembled, disassembled, and maintained.

[0015] An energy storage battery pack includes a heat dissipation duct as described above.

[0016] Preferred options also include: The enclosure contains multiple battery cells arranged side by side, with a main air duct fitted between any two adjacent battery cells. A lid, which is detachably connected to the box body, is used to open or close the box body; The housing is equipped with ventilation openings, and the inlet of the first air guide and the outlet of the second air guide are both equipped with ventilation openings.

[0017] This simple structure facilitates airflow between the battery cells, thereby effectively ensuring heat dissipation efficiency.

[0018] Preferably, in a cross section perpendicular to the main air duct and along its first end to second end, the area of ​​the vent is not less than 1.2 times the maximum area of ​​the first air guide and the second air guide.

[0019] When the area of ​​the vent is not less than 1.2 times the maximum area of ​​the first and second air guides in a cross section perpendicular to the main air duct and along its first to second ends, throttling losses at both ends of the ventilation cavity can be avoided.

[0020] Preferably, a buffer layer is provided on the inner side of the box lid.

[0021] The buffer layer can prevent rigid contact between the cover and the battery cell, and also prevent rigid contact between the cover and the heat dissipation duct, thereby reducing component wear during transportation or vibration.

[0022] Preferably, the housing is provided with a positioning part to limit the position of the battery cell.

[0023] The positioning part ensures that the battery cell does not shift during assembly and use.

[0024] Compared with existing technologies, this utility model has strong structural reliability and can effectively improve the uniformity of heat dissipation of the battery cell and the overall safety of the battery pack. By realizing the construction of an efficient heat conduction path, this utility model can effectively reduce airflow resistance, improve airflow circulation efficiency, and effectively suppress the risk of thermal runaway. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the heat dissipation air duct in an embodiment of the present utility model; Figure 2 for Figure 1 A sectional view; Figure 3 This is a cross-sectional view of the main air duct in an embodiment of this utility model; Figure 4 This is a cross-sectional view of the air guide component 1 in an embodiment of this utility model; Figure 5 This is a schematic diagram illustrating the arrangement of a partition in one embodiment of the present utility model; Figure 6 This is a schematic diagram illustrating the arrangement of a partition in one embodiment of the present utility model; Figure 7 This is a schematic diagram illustrating the arrangement of a partition in one embodiment of the present utility model; Figure 8 This is a schematic diagram illustrating the arrangement of a partition in one embodiment of the present utility model; Figure 9 This is a schematic diagram of the energy storage battery pack in an embodiment of the present utility model; Figure 10 This is a cross-sectional view of the energy storage battery pack in an embodiment of this utility model.

[0026] In the diagram: 1-Heat dissipation duct; 2-Main air duct; 3-Partition 1; 4-Ventilation unit; 5-Air guide 1; 6-Air guide 2; 7-Longitudinal partition 1; 8-Transverse partition 1; 9-Longitudinal partition 2; 10-Transverse partition 2; 11-Box body; 12-Box cover; 13-Battery cell; 14-Ventilation opening; 15-Partition 2. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to specific embodiments.

[0028] like Figures 1-4As shown, a heat dissipation air duct 1 includes a main air duct 2. A partition 3 is provided in the ventilation cavity of the main air duct 2 to divide the ventilation cavity into multiple ventilation units 4. A guide 5 is provided at the first end of the main air duct 2, and a guide 6 is provided at the second end of the main air duct 2. In the direction from the first end to the second end of the main air duct 2, the guide 5 has a condensation structure, and the guide 6 has a diffusion structure.

[0029] In this embodiment, the first end is configured as the inlet end and the second end as the outlet end. In this embodiment, the main air duct 2 is generally elongated, and its length is preferably matched with the length of the battery cell 13. Typically, the ventilation cavity can be divided into multiple parallel flow channels by a partition 3. This partition 3 improves the structural strength of the main air duct 2, preventing crushing damage, and thereby increases the contact area between the airflow and the inner wall of the heat dissipation duct 1, increases the airflow velocity, and thus achieves better heat exchange. In this embodiment, the partition 3 includes at least one longitudinal partition 7 and / or at least one transverse partition 8; the air guide 5 and the air guide 6 are provided with partitions 15, and the partitions 15 and 3 are correspondingly arranged. Specifically, in this embodiment, partition 3 includes one longitudinal partition 7 and multiple transverse partitions 8. Correspondingly, partition 15 includes one longitudinal partition 9 and multiple transverse partitions 10. Thus, the ventilation cavity is composed of multiple ventilation units 4 arranged in a rectangular array, thereby better increasing the contact area between the airflow and the inner wall of the heat dissipation duct 1, and better accelerating the airflow, thereby better meeting the heat dissipation requirements of the battery cell 13. Figures 5-8 As shown, in different embodiments, in partition 13, longitudinal partition 7 and transverse partition 8 can be selected, and their quantities can be adjusted according to the actual situation. Partition 2 15 is set in the same way.

[0030] In this embodiment, the main air duct 2 is made of aluminum alloy through extrusion molding. Aluminum alloy has a high thermal conductivity and good extrusion molding performance, and complex internal flow channel structures can be achieved through extrusion. The first air guide 5 and the second air guide 6 are made of PP (polypropylene) through injection molding. In particular, reinforced PP is preferred, as it has good temperature resistance, lightweight, and molding precision, and complex flow guiding structures can be achieved through injection molding. Therefore, this embodiment can achieve a balance between weight and cost reduction and performance at the manufacturing end. That is, the main air duct 2 is formed by extrusion molding, and the first air guide 5 and the second air guide 6 are produced by injection molding. Both processes have the advantage of high production efficiency. The material selection takes into account both performance and economy. Compared with the traditional all-metal heat dissipation air duct 1, it can not only effectively reduce the overall weight of the battery pack, but also significantly reduce manufacturing costs.

[0031] In this embodiment, the first air guide 5 and the second air guide 6 are detachably connected to the main air duct 2. Specifically, a buckle or step can be provided on the inner side of the main air duct 2 to connect with the first air guide 5 and the second air guide 6. The first air guide 5 and the second air guide 6 are both interference fit with the main air duct 2 to ensure the connection is airtight and prevent airflow from leaking from the connection gap.

[0032] In this embodiment, both the first air guide 5 and the second air guide 6 have a flared structure. Due to their different locations, they respectively exhibit a condensation structure and a diffusion structure. In this embodiment, the condensation angle of the first air guide 5 is 15° to 30°, and the diffusion angle of the second air guide 6 is 15° to 30°. To further improve airflow guiding efficiency, on the cross-section perpendicular to the main air duct 2 and along its first to second ends, the maximum area of ​​both the first air guide 5 and the second air guide 6 is not less than 1.5 times the area of ​​the ventilation cavity, thereby reducing local resistance when airflow enters and exits the main air duct 2.

[0033] like Figure 9 and Figure 10 As shown, based on the above embodiments, this embodiment is applied to an energy storage battery pack, which further includes a housing 11 and a cover 12. Multiple battery cells 13 are arranged side-by-side in the housing 11, and a main air duct 2 is fitted between any two adjacent battery cells 13. The cover 12 and the housing 11 are detachably connected for opening or closing the housing 11. The housing 11 is provided with ventilation openings 14, and the inlet of the first air guide 5 and the outlet of the second air guide 6 both correspond to ventilation openings 14.

[0034] The housing 11 serves as the supporting foundation for the energy storage battery pack, and the battery cells 13 are fixed inside the housing 11. The main air duct 2 is attached to any adjacent battery cells 13 and forms a tight fit with the battery cells 13 through adhesive components. The first air guide 5 and the second air guide 6 are respectively connected to the two ends of the main air duct 2, and the first air guide 5 and the second air guide 6 correspond to the ventilation openings 14 respectively. The housing cover 12 covers the top of the housing 11, forming a protective and heat dissipation space, and covering the battery cells 13, the main air duct 2, and the first air guide 5 and the second air guide 6.

[0035] In this embodiment, the housing 11 is made of sheet metal, such as cold-rolled steel plate or aluminum alloy plate, which has high structural strength and load-bearing capacity. Aluminum alloy plate is suitable for lightweight applications, while cold-rolled steel plate is suitable for high load-bearing applications. Anti-corrosion treatment is applied to the surface of the housing 11 to effectively extend its service life in outdoor or humid environments. The housing 11 is provided with a positioning part to limit the position of the battery cell 13. The positioning part can be a positioning protrusion or a limiting groove to ensure that the battery cell 13 does not shift during assembly and use.

[0036] In this embodiment, mounting holes are provided on the housing 11 to facilitate fixing the entire heat dissipation duct 1 inside the housing 11. A dustproof mesh is provided on the inner side of the vent 14 to effectively prevent external dust from entering the interior of the heat dissipation duct 1.

[0037] In this embodiment, the cover 12 is made of composite material or sheet metal, such as glass fiber reinforced polypropylene, carbon fiber reinforced epoxy resin, galvanized steel plate, or aluminum alloy plate. Composite materials are suitable for lightweight and corrosion-resistant applications (such as outdoor energy storage battery packs), while sheet metal is suitable for high-protection applications (such as industrial-grade energy storage cabinets). A buffer layer, such as 0.5mm thick EVA foam, is provided on the inner side of the cover 12 to prevent direct rigid contact between the cover 12 and the battery cells 13 and the heat dissipation duct 1, reducing component wear during transportation or vibration. Furthermore, the cover 12 and the housing 11 can be connected by snaps or bolts, with sealing strips at the connection points to improve the dustproof and waterproof rating of the energy storage battery pack. In other words, this embodiment has outstanding advantages in structural stability. The box 11 is made of sheet metal and bears both load-bearing and installation functions. The box cover 12 achieves reliable protection through a combination structure of composite material / sheet metal material and buffer layer. The connection method between the components has been optimized to ensure that the energy storage battery pack maintains structural stability under complex scenarios such as vibration and impact, and fully meets the requirements for long-term use.

[0038] In this embodiment, the contact surface between the main air duct 2 and the battery cell 13 is a plane, ensuring a tight fit with the surface of the battery cell 13, reducing air gaps, and preventing increased thermal resistance due to air gaps, which would affect heat dissipation efficiency. The contact surface of the main air duct 2 is bonded to the surface of the battery cell 13 with 3M tape, and the tape coverage area is not less than 90% of the contact surface area, ensuring bonding stability and continuity of the heat conduction path. Thus, for the energy storage battery pack, the heat generated by the battery cell 13 during operation is dissipated sequentially through the surface of the battery cell 13, the 3M tape, the main air duct 2, and the airflow within the main air duct 2. It should be noted that in this path, the high thermal conductivity of the aluminum alloy material can quickly transfer heat to the main air duct 2, thereby achieving forced convection heat dissipation in conjunction with airflow, effectively controlling the surface temperature of the battery cell 13. Therefore, this embodiment achieves efficient temperature control by optimizing the heat dissipation design. The main air duct 2 is made of high thermal conductivity aluminum alloy and is tightly bonded to the battery cell 13 with the help of 3M tape, thus constructing a low-resistance and efficient heat conduction path. At the same time, the flared structure of the air guide 5 and the air guide 6 effectively reduces airflow resistance and improves airflow circulation efficiency, ultimately significantly suppressing the risk of battery thermal runaway.

[0039] In this embodiment, on a cross-section perpendicular to the main air duct 2 and along its first to second ends, the area of ​​the vent 14 is not less than 1.2 times the maximum area of ​​the first air guide 5 and the second air guide 6. Specifically, the vent 14 includes multiple hexagonal air guide units, which are arranged in a regular array to correspond to the first air guide 5 and the second air guide 6.

[0040] In this embodiment, the battery cell 13 is a lithium-ion battery (such as a lithium iron phosphate battery). The tabs of the battery cell 13 and the negative tab are oriented in the same direction, which facilitates subsequent connection with the busbar. The structure is simple and easy to operate.

[0041] Therefore, this embodiment has flexible scene adaptability. By adjusting the length of the main air duct 2, the number of ventilation units 4, and the angle of the flared structure of the air guide 5 and the air guide 6, it can quickly adapt to battery packs of different specifications. Based on this feature, its application scope can cover a variety of scenarios such as residential energy storage, industrial and commercial energy storage, and grid-side energy storage.

[0042] The above are merely preferred embodiments of this utility model. It should be noted that the above preferred embodiments should not be considered as limitations on this utility model, and the scope of protection of this utility model should be determined by the scope defined in the claims. For those skilled in the art, several improvements and modifications can be made without departing from the spirit and scope of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A heat dissipation air duct, characterized in that, Includes a main air duct, wherein a partition is provided in the ventilation cavity of the main air duct to divide the ventilation cavity into multiple ventilation units; The first end of the main air duct is provided with an air guide component one, and the second end of the main air duct is provided with an air guide component two. In the direction from the first end to the second end of the main air duct, the air guide component one has a condensation structure, and the air guide component two has a diffusion structure.

2. A heat dissipating air duct as claimed in claim 1, characterized in that The partition 1 includes at least one longitudinal partition 1 and / or at least one transverse partition 1; The air guide component one and the air guide component two are provided with a partition two, and the partition two is provided in correspondence with the partition one.

3. A heat dissipation duct as described in claim 1, characterized in that, The first air guide has a contraction angle of 15° to 30°, and the second air guide has a diffusion angle of 15° to 30°.

4. The heat dissipating air duct as set forth in claim 1, wherein On a cross section perpendicular to the main air duct and along its first to second ends, the maximum area of ​​both the first and second air guides is not less than 1.5 times the area of ​​the ventilation cavity.

5. The heat dissipating air duct according to claim 1, wherein, The air guide component one and air guide component two are detachably connected to the main air duct.

6. An energy storage battery pack, characterized by, Includes the heat dissipation air duct as described in any one of claims 1 to 5.

7. An energy storage battery pack as claimed in claim 6, wherein, Also includes: The enclosure contains multiple battery cells arranged side by side, with a main air duct fitted between any two adjacent battery cells. A lid, which is detachably connected to the box body, is used to open or close the box body; The housing is equipped with ventilation openings, and the inlet of the first air guide and the outlet of the second air guide are both equipped with ventilation openings.

8. An energy storage battery pack as claimed in claim 7, wherein, On a cross section perpendicular to the main air duct and along its first to second ends, the area of ​​the vent is not less than 1.2 times the maximum area of ​​the first and second air guides.

9. An energy storage battery pack as claimed in claim 7, wherein, A buffer layer is provided on the inside of the box lid.

10. An energy storage battery pack as claimed in claim 7, wherein, The housing is equipped with a positioning part to limit the position of the battery cell.

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