Ventilated partition

Abstract

The application relates to the field of batteries, and particularly discloses a ventilation partition plate which is configured as an even number of sub-air ducts for guiding cooling airflow to flow; the sub-air ducts at least comprise a first configuration surface, a second configuration surface and a third configuration surface; the second configuration surface and the third configuration surface are respectively adjacent to the first configuration surface; at least one group of adjacent sub-air ducts is provided with a mixed-air opening; the ventilation partition plate has improved heat dissipation efficiency through the curved surface capable of generating the Coanda effect.

Description

Technical Field

[0001] This invention relates to the field of secondary batteries, and more particularly to a ventilated partition for separating individual battery cells in a battery pack and providing a heat dissipation structure. Background Technology

[0002] Energy storage battery packs are high-energy storage devices with a long service life, widely used in commercial energy storage. They consist of several battery cells connected in series and parallel in a specific configuration. During charging and discharging, the battery pack generates a significant amount of heat, causing its temperature to rise. Excessive temperature can affect the battery pack's performance and lifespan, and may even pose safety hazards.

[0003] In existing technologies, heat dissipation of battery packs is generally achieved by setting up ventilation baffles. However, many ventilation baffles on the market adopt a single-row multi-substrate air duct structure. This structure is suitable for dissipating heat from relatively small battery packs, as small battery packs generate less heat, and the ventilation baffle with a single-row multi-substrate air duct structure can promptly remove the heat generated during battery pack operation. However, for large battery packs, which generate more heat, the ventilation baffle with a single-row multi-substrate air duct structure cannot effectively remove the heat generated during battery pack operation. Existing technologies also include air duct baffles with a double-row multi-substrate air duct structure, such as the one in patent number [patent number missing]. According to CN216213823U, a heat insulation pad and a battery are provided. The heat insulation pad in the battery has multiple second ribs on its surface. The second ribs abut against the heat dissipation structure in the battery. The heat dissipation structure includes multiple first ribs, which form a double-row multi-sub-air duct structure. However, each sub-air duct is independent of each other and cannot perform good heat exchange. The generated heat cannot be discharged in time, causing uneven heat dissipation of the battery cell with an excessively large range, which greatly reduces the service life of the battery cell and poses certain safety hazards. Therefore, this invention provides a new ventilation partition. Summary of the Invention

[0004] The technical problem this invention aims to solve is that in existing technologies, each sub-duct is independent, which limits the heat exchange of airflow between them, leading to uneven heat dissipation. This invention provides a ventilation baffle with a mixing opening, allowing heat exchange of airflow between the sub-ducts for more uniform heat dissipation. Furthermore, this invention incorporates curved surfaces protruding into the sub-ducts on their structural surfaces. These curved surfaces create a wall-attaching effect on the airflow entering the sub-ducts, causing a suction effect as the airflow leaves the curved surface. This accelerates the airflow velocity outside the curved surface, improving the heat dissipation efficiency of the sub-ducts.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A ventilation baffle is configured with an even number of sub-ducts to guide cooling airflow. Each sub-duct includes at least a first structural surface, a second structural surface, and a third structural surface. The second and third structural surfaces are respectively adjacent to the first structural surface. A mixing opening is provided between at least one group of adjacent sub-ducts, connecting them to increase heat dissipation space. Since the heat generated by each battery cell is inconsistent, the heat dissipation efficiency of each sub-duct is also inconsistent. The mixing opening enables heat exchange between adjacent sub-ducts to even out heat distribution, thus improving the heat dissipation effect of the ventilation baffle.

[0007] Preferably, at least one of the first, second, and third structural surfaces has a curved surface that protrudes into the sub-duct and extends along the airflow direction. The wall-attachment effect of the curved surface can accelerate the flow velocity of the air leaving the curved surface, thereby improving heat dissipation efficiency.

[0008] Preferably, the curved surface is positioned close to the airflow inlet, so that the airflow can move forward along the curved surface as quickly as possible after entering the sub-duct.

[0009] Preferably, the curved surface includes an approaching surface facing the airflow and a departure surface facing away from the airflow, and the curvature of the approaching surface is greater than the curvature of the departure surface. This increases the flow pressure difference between the approaching and departure surfaces, thereby enhancing the suction effect of the airflow on the departure surface.

[0010] Preferably, the air mixing opening is disposed on the first structural surface to expand the heat dissipation space. Simultaneously, the air mixing opening on the first structural surface effectively connects and mixes the heat dissipation airflow in two adjacent sub-air ducts that directly interact with two adjacent battery cells, effectively solving the problem of uneven heat dissipation among the battery cells. Furthermore, multiple air mixing openings disposed on the first structural surface can further reduce the weight of the ventilation baffle.

[0011] Preferably, the curved surface is disposed on the first structural surface. This allows the suction effect generated by the wall attachment to accelerate the airflow velocity near the battery cell, thereby effectively improving the heat dissipation efficiency of the battery cell.

[0012] Preferably, the curved surface is disposed on the second and third structural surfaces. This also allows the suction effect generated by the wall attachment to accelerate the airflow velocity in the sub-duct, thereby effectively improving the heat dissipation efficiency of the battery cell.

[0013] Due to the adoption of the above technical solutions, the present invention has the following beneficial effects:

[0014] 1. In this invention, a ventilation baffle is disposed within a battery pack, which contains multiple battery cell units. The ventilation baffle is used to form an even number of sub-air ducts between adjacent battery cell units to guide the flow of cooling air. At least one set of adjacent sub-air ducts is provided with a mixing air opening, which increases the heat dissipation space of the ventilation baffle, improves the heat dissipation uniformity of adjacent battery cell units, and also effectively reduces the weight of the ventilation baffle.

[0015] 2. In this invention, at least one of the first, second, and third structural surfaces is provided with a curved surface that protrudes into the sub-channel and extends along the airflow direction. The suction effect generated by the wall adhesion effect of the curved surface effectively increases the flow rate of the airflow outside the curved surface, which can quickly remove more heat generated by the battery cell during operation and effectively enhance the heat dissipation effect of the battery pack. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention.

[0017] Figure 1 This is a schematic diagram of the battery pack structure in Embodiment 1 of the present invention;

[0018] Figure 2 for Figure 1 Partial structural diagram;

[0019] Figure 3 for Figure 2 A structural diagram from another angle;

[0020] Figure 4 This is a schematic diagram of a ventilation partition in this invention;

[0021] Figure 5 This is another structural schematic diagram of the ventilation partition in this invention;

[0022] Figure 6 for Figure 5 A sectional view;

[0023] Figure 7 This is a schematic diagram of another structure of the ventilation partition in this invention;

[0024] Figure 8 This is a schematic diagram of another structure of the ventilation partition in this invention;

[0025] Figure 9 for Figure 8 A sectional view.

[0026] Figure label:

[0027] 1. Housing; 11. Air inlet; 12. Air outlet; 121. Fan; 2. Ventilation partition; 21. Sub-air duct; 211. First structural surface; 212. Second structural surface; 213. Third structural surface; 214. Mixing air opening; 215. Curved surface; 22. Body; 23. Horizontal rib; 3. Battery cell module; 31. Battery cell unit; 4. First heat dissipation channel; 5. Second heat dissipation channel. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] Unless otherwise defined, the technical or scientific terms used in this patent document shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this patent specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an," "a," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" indicate that the element or object preceding "comprising" encompasses the element or object listed following "comprising" or its equivalents, and do not exclude other elements or objects. Terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are used only to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. These terms are only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, features in the following embodiments can be combined with each other.

[0033] Example 1:

[0034] This invention is suitable for application in energy storage battery packs. In this embodiment, the battery pack includes a housing 1 and two sets of cell modules 3. Of course, in other embodiments, the number of cell modules 3 can also be three or four sets, etc. The housing 1 has an air inlet 11 and an air outlet 12. A first heat dissipation channel 4 communicating with the air outlet 12 is formed between the cell modules 3. The cell module 3 includes at least two cell units 31. A second heat dissipation channel 5 communicating with the air inlet 11 is formed between adjacent cell units 31. The first heat dissipation channel 4 and the second heat dissipation channel 5 are connected. The ventilation baffle 2 provided in this invention is arranged in the second heat dissipation channel 5. A fan 121 is arranged at the air outlet 12 to accelerate the heat dissipation of the first heat dissipation channel 4.

[0035] Please see Figures 1 to 4 The present invention provides a ventilation baffle 2, which is provided with an even number of sub-air ducts 21 to guide the cooling airflow entering from the outside of the battery pack to flow inside the battery pack. In this embodiment, the sub-air duct 21 is composed of a first structural surface 211, a second structural surface 212, and a third structural surface 213; the second structural surface 212 and the third structural surface 213 are respectively adjacent to the first structural surface 211; their open sides correspond to the sidewalls of the cell unit 31.

[0036] In this embodiment, the ventilation baffle 2 includes longitudinally extending transverse ribs 23; specifically, the body 22 and the transverse ribs 23 are integrally formed. First structural surfaces 211 forming sub-air ducts are defined on both sides of the body 22. In this embodiment, the first structural surface 211 is a vertical surface. Second structural surfaces 212 and third structural surfaces 213 are defined on the upper and lower surfaces of the transverse ribs 23, respectively, and are perpendicular to the first structural surface 211. In this embodiment, the ventilation baffle 2 of this structure is configured in two horizontal rows, thirteen layers vertically, for a total of twenty-six sub-air ducts. Each sub-air duct 21 is arranged in pairs horizontally. A mixing opening 214 is provided between adjacent horizontal sub-air ducts 21. Adjacent horizontal sub-air ducts 21 are interconnected through the mixing opening 214, allowing the heat dissipation airflow in adjacent sub-air ducts 21 to mix evenly during heat dissipation, achieving effective heat exchange and effectively solving the problem of uneven heat dissipation due to different heat generation in each battery cell 31. Meanwhile, the arrangement of the air mixing opening 214 can effectively reduce the weight of the ventilation baffle 2, thereby further reducing the weight of the entire battery pack. In this embodiment, the air mixing opening 214 in the upper and lower sub-air ducts 21 is staggered to increase the mechanical strength of the ventilation baffle 2.

[0037] Based on the teachings of the above embodiments, those skilled in the art should understand that, as Figure 5 As shown, the mixing opening 214 can also be provided on the transverse rib 23, forming mixing openings of adjacent sub-air ducts 21 on the transverse rib 23, so that the heat dissipation of the upper and lower positions of the battery cell 31 can be mixed for heat exchange, making the heat dissipation of the battery cell 31 more uniform. Similarly, under the teaching of the above embodiments, those skilled in the art should also know that the mixing opening 214 provided on the transverse rib 23 can be arranged sequentially, for example, the lowest layer is close to the airflow inlet, and each upper layer is arranged away from the airflow inlet. The arrangement of the mixing opening 214 can form a convection channel that is inclined upward from the airflow inlet to the airflow direction. The convection channel can have various forms and can be configured according to the internal structure and heating state of the battery cell 31.

[0038] Example 2:

[0039] Please see Figure 5 and Figure 6 In this embodiment, the first structural surface 211 is provided with a curved surface 215 that protrudes into the sub-air duct 21 and extends along the airflow direction. Specifically, in this embodiment, the curved surface 215 is disposed on the first structural surface 211. The airflow passes through the curved surface 215 and enters the first heat dissipation channel 4 from the second heat dissipation channel 5. The curved surface 215 extends the airflow path, which can increase the airflow velocity, improve heat dissipation efficiency, realize heat dissipation of the battery pack, and enhance the heat dissipation effect.

[0040] Specifically, the surface 215 is a Coanda surface capable of generating the Coanda effect, also known as the wall adhesion effect or Coanda effect. Fluids (water or air) tend to deviate from their original flow direction and flow along a convex surface. Therefore, when airflow passes over the Coanda surface 215, the airflow will flow along the surface 215, reducing wind resistance and turbulence, increasing airflow velocity, improving heat dissipation efficiency, and enhancing the heat dissipation capacity of the battery pack.

[0041] In this embodiment, as Figure 6 As shown, the curved surface 215 is disposed on the first structural surface 211, and the first structural surface 211 is disposed on the body 22; in other embodiments, such as Figure 7 As shown, the curved surface 215 can also be disposed on the second structural surface 212 and the third structural surface 213; in another embodiment, the curved surface 215 can also be disposed only on the second structural surface 212 or the third structural surface 213, while the second structural surface 212 and the third structural surface 213 are disposed on the transverse rib 23, that is, in other embodiments, the curved surface 215 is disposed on the transverse rib 23, and the curved surface 215 is formed by protrusions on the upper and lower surfaces of the transverse rib 23.

[0042] The curved surface 215 is positioned close to the airflow inlet, allowing the curved surface 215 to come into contact with the cooling airflow more quickly. This facilitates the cooling airflow changing its flow direction and flowing along the curved surface 215, thereby enhancing the heat dissipation effect.

[0043] Surface 215 includes a welcoming surface facing the airflow and a departing surface facing away from the airflow, with the curvature of the welcoming surface being greater than that of the departing surface. In this embodiment, the airflow first passes through the welcoming surface and then through the departing surface. The welcoming surface and the departing surface are integrally formed, and the curvature of the welcoming surface is greater than that of the departing surface. This increases the flow pressure difference between the airflow on the welcoming surface and the departing surface, thereby enhancing the suction effect of the airflow on the departing surface. This accelerates the airflow on the upper layer of the departing surface, which is beneficial for improving the heat dissipation efficiency of the battery pack.

[0044] The other structures in this embodiment are basically the same as those in Embodiment 1, and will not be described in detail here.

[0045] In addition, there are many ways in which the curved surface 215 is combined with the air mixing opening 214 in this invention: such as Figure 5 and Figure 6 As shown in the diagram, the air mixing opening 214 is located on the transverse rib 23, and the curved surface 215 is located on the body 22; as Figure 7 As shown in the diagram, the air mixing opening 214 is located on the main body 22, and the curved surface 215 is located on the transverse rib 23; as Figure 8 and Figure 9As shown in the diagram, the mixing opening 214 is disposed on the body 22, and the curved surface is also disposed on the body 22. The various connection methods listed above should also fall within the scope of protection of this invention.

[0046] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A ventilation baffle suitable for use in an energy storage battery pack, the battery pack comprising a housing and multiple sets of cell modules, the housing having an air inlet and an air outlet; a first heat dissipation channel communicating with the air outlet is formed between each set of cell modules, each set of cell modules comprising at least two cell units; a second heat dissipation channel communicating with the air inlet is formed between two adjacent cell units, the first heat dissipation channel communicating with the second heat dissipation channel, the ventilation baffle being disposed within the second heat dissipation channel, the ventilation baffle being configured as an even number of sub-air ducts to guide cooling airflow entering from outside the battery pack to flow inside the battery pack; characterized in that: The sub-duct includes at least a first structural surface, a second structural surface, and a third structural surface; the second structural surface and the third structural surface are respectively adjacent to the first structural surface; a mixing opening is provided between at least one set of adjacent sub-ducts; a curved surface is provided on at least one of the first structural surface, the second structural surface, and the third structural surface, protruding into the sub-duct and extending along the direction of airflow; the curved surface includes a welcoming surface facing the airflow and a departing surface facing away from the airflow, and the curvature of the welcoming surface is greater than the curvature of the departing surface; The ventilation baffle includes a body and transverse ribs extending longitudinally along both sides of the body. The two sides of the ventilation baffle form the first structural surface, and the upper and lower surfaces of the transverse ribs form the second structural surface and the third structural surface, respectively. The second structural surface and the third structural surface are perpendicular to the first structural surface. The mixing openings in the sub-air ducts of the upper and lower layers are staggered. The curved surface is positioned close to the airflow inlet.

2. The ventilation partition according to claim 1, characterized in that, The air mixing opening is located on the first structural surface.

3. The ventilation partition according to claim 1, characterized in that, The curved surface is disposed on the first construction surface.

4. The ventilation partition according to claim 1, characterized in that, The curved surface is disposed on the second and / or third construction surfaces.

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