Battery air cooling structure and battery pack

Abstract

The utility model provides a battery air cooling structure and a battery pack. The battery air-cooling structure comprises an end plate, a first air-cooling plate and a second air-cooling plate, the partition plate is connected with the end plate, a containing area used for containing the battery cell is formed between the partition plate and the end plate, the partition plate is provided with a second flow channel, the first flow channel is communicated with the second flow channel, the side wall of the end plate and / or the partition plate is further provided with a communicating hole, and the first flow channel and / or the second flow channel are / is communicated with the containing area through the communicating hole. The battery air cooling structure solves the problem of poor cooling effect of the battery air cooling structure in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a battery air-cooling structure and a battery pack. Background Technology

[0002] In the field of energy storage systems, air cooling is a commonly used heat dissipation method. Currently, the air-cooled structure of batteries in the energy storage system market usually involves setting up air cooling channels between adjacent battery modules to achieve side cooling of each battery module.

[0003] However, the existing air-cooling structure for batteries has poor cooling performance, especially for large-capacity battery cells, and can no longer meet the heat dissipation requirements. Utility Model Content

[0004] The main objective of this invention is to provide a battery air-cooling structure and battery pack to solve the problem of poor cooling effect in existing battery air-cooling structures.

[0005] To achieve the above objectives, according to one aspect of the present invention, a battery air-cooling structure is provided, comprising: an end plate having a first flow channel; a partition plate connected to the end plate, forming a receiving area for accommodating a battery cell between the partition plate and the end plate, the partition plate having a second flow channel, the first flow channel and the second flow channel being connected in communication, and the sidewalls of the end plate and / or the partition plate also having a connecting hole, the first flow channel and / or the second flow channel being connected to the receiving area through the connecting hole.

[0006] Furthermore, the partition plate includes a partition portion and a connecting portion, the partition portion and the end plate are spaced apart, the partition portion and the end plate are connected by the connecting portion, both the partition portion and the connecting portion have a second flow channel, and the partition portion and / or the connecting portion have a connecting hole.

[0007] Furthermore, there are multiple connecting holes, and connecting holes are provided on both opposite sides of the partition and / or connecting part.

[0008] Furthermore, the connecting holes that are positioned opposite each other are aligned with each other.

[0009] Furthermore, there are multiple partitions, at least some of which are spaced apart, and an accommodating area is formed between the end plate and the partitions, and between each partition. There are multiple connecting parts, and the partitions are connected to each other through the connecting parts.

[0010] Furthermore, the partition and the end plate are arranged at intervals along the first direction, and the length direction of the partition is the second direction. The first direction and the second direction are set at an angle. In the second direction, the second flow channel in the partition passes through both ends of the partition; and / or in the first direction, the second flow channel in the connecting part passes through both ends of the connecting part, and the side of the end plate away from the connecting part has a through hole, which is aligned with the second flow channel of the connecting part.

[0011] Furthermore, along the length of the end plate, the first flow channel extends through both ends of the end plate.

[0012] Furthermore, there are multiple end plates, and partition plates are located between the end plates. The partition plates are integrated and connected to the end plates on both sides.

[0013] According to another aspect of the present invention, a battery pack is provided, including the above-described battery air-cooling structure, wherein the battery cells are disposed within the receiving area of ​​the battery air-cooling structure.

[0014] Furthermore, the battery pack also includes fasteners that are wrapped around the outside of the battery air-cooling structure and limit the cells within the housing area.

[0015] By applying the technical solution of this utility model, a first flow channel and a second flow channel that are interconnected are provided on the end plate and the separator plate. This allows airflow to enter the flow channels during air cooling, thus cooling both the end plate and the separator plate. In turn, the end plate and the separator plate cool and dissipate heat from the battery cell. Simultaneously, the connecting holes allow airflow to directly act on the outer surface of the battery cell, further enhancing the cooling effect. Overall, this significantly improves the air cooling and heat dissipation effect on the battery cell, meeting the air cooling requirements of large-capacity battery cells. Furthermore, the flow channels and connecting holes significantly reduce the weight of the battery air cooling structure, achieving a weight reduction effect. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0017] Figure 1 A schematic diagram of the battery pack structure of this utility model is shown;

[0018] Figure 2 A schematic diagram of the partition plate of the battery air-cooling structure of this utility model is shown;

[0019] Figure 3 It shows Figure 2 Side view;

[0020] Figure 4 It shows Figure 2 The main view;

[0021] Figure 5 A schematic diagram of the end plate of the battery air-cooling structure of this utility model is shown;

[0022] Figure 6 It shows Figure 5 Side view.

[0023] The above figures include the following reference numerals:

[0024] 10. End plate; 11. First flow channel; 12. Through hole; 20. Separator plate; 21. Second flow channel; 22. Connecting hole; 23. Separator part; 24. Connecting part; 30. Battery cell; 40. Fastener. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0027] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0028] To address the problem of poor cooling performance in existing battery air-cooling structures, this invention provides a battery air-cooling structure and a battery pack.

[0029] like Figures 1 to 6 The battery air-cooling structure shown includes an end plate 10 and a separator plate 20. The end plate 10 has a first flow channel 11. The separator plate 20 is connected to the end plate 10, and a receiving area for accommodating a battery cell 30 is formed between the separator plate 20 and the end plate 10. The separator plate 20 has a second flow channel 21, and the first flow channel 11 and the second flow channel 21 are connected. The sidewalls of the end plate 10 and / or the separator plate 20 also have a connecting hole 22, through which the first flow channel 11 and / or the second flow channel 21 are connected to the receiving area.

[0030] This embodiment features a first flow channel 11 and a second flow channel 21 that are interconnected on the end plate 10 and the separator plate 20. During air cooling, airflow can enter these channels, effectively cooling both the end plate 10 and the separator plate 20. This, in turn, cools the battery cell 30 through the end plate 10 and the separator plate 20. Furthermore, the connecting hole 22 allows airflow to directly act on the outer surface of the battery cell 30, further enhancing the cooling effect. Overall, this significantly improves the air cooling performance of the battery cell 30, meeting the air cooling requirements of large-capacity batteries. Simultaneously, the flow channels and connecting hole 22 significantly reduce the weight of the battery air cooling structure, achieving a weight reduction effect.

[0031] Optionally, the number of end plates 10 can be set as needed, and one or more can be set. In this embodiment, two end plates 10 are provided, which are spaced apart by a certain distance. The partition plate 20 is located between the two end plates 10 and is connected to both end plates 10, so that the second flow channel 21 on the partition plate 20 and the first flow channel 11 on the end plate 10 are naturally connected and connected. The specific shape of the partition plate 20 can be set as needed, and the accommodating area can be formed by both the structure between the partition plate 20 and the end plates 10 and the structure of the partition plate 20 itself.

[0032] like Figure 2 and Figure 5 As shown, in this embodiment, connecting holes 22 are provided on the sides of both the end plate 10 and the separator plate 20, which helps to increase the heat exchange between the airflow and the battery cell, thereby improving the cooling effect. Meanwhile, the connecting holes 22 on the end plate 10 and the separator plate 20 are basically arranged in the same way, mainly with their shape and size adjusted according to the specific structure of the end plate 10 and the separator plate 20. Of course, connecting holes 22 can also be provided in only one of the end plate 10 and the separator plate 20. When the battery pack is air-cooled, the airflow blows laterally onto the peripheral side of the battery pack, that is, onto the surface of the end plate with a larger area and the end of the separator plate 20, which is along the first and second directions mentioned later. At this time, the airflow can enter the first flow channel 11 and the second flow channel 21, thereby achieving the heat dissipation effect on the battery cell 30.

[0033] like Figures 2 to 4As shown, the partition plate 20 of this embodiment includes a partition portion 23 and a connecting portion 24. The partition portion 23 is spaced apart from the end plate 10, and the connecting portion 24 is disposed between the partition portion 23 and the end plate 10, thereby forming at least a partially accommodating area. The partition portion 23 and the end plate 10 are connected by the connecting portion 24, thus making the partition plate 20 a single integral component and allowing the partition plate 20 and the end plate 10 to be connected together. In this embodiment, a second flow channel 21 is provided in both the partition portion 23 and the connecting portion 24, so that the second flow channel 21 can cover the entire space within the partition plate 20, further improving the cooling effect. At the same time, the partition portion 23 and / or the connecting portion 24 may have a connecting hole 22. In this embodiment, a connecting hole 22 is provided on the side of both the partition portion 23 and the connecting portion 24, which helps to increase the direct contact area between the airflow and the battery cell 30, thereby contributing to improving the cooling effect.

[0034] In this embodiment, the connecting hole 22 is an elongated hole that extends along the length or height of the partition plate 20, that is, along the lateral length or height of the battery cell 30, thereby helping to increase the direct contact area. Furthermore, this embodiment has multiple elongated holes, with connecting holes 22 provided on both opposite sides of the partition portion 23 and both opposite sides of the connecting portion 24, thus making airflow smoother.

[0035] Preferably, the connecting holes 22 on the opposite sides of the partition 23 and the opposite sides of the connecting part 24 are aligned with each other. That is, the partition 23 and the connecting part 24 are provided through each other along their respective thickness directions, so that connecting holes 22 are formed on both opposite sides, allowing airflow to convect through the connecting holes 22 on both sides, thereby improving the air cooling effect on the battery cell 30. Of course, the specific location and shape of the connecting holes 22 can be adjusted as needed. For example, the connecting holes 22 can be provided only on the partition 23 or the connecting part 24, or the connecting holes 22 can be round holes, with multiple round holes arranged in an array on the side of the partition 23.

[0036] The number of partitions 23 and connecting parts 24 in this embodiment can be set as needed, thereby allowing the partitions to form different shapes and structures. For example, in an embodiment not shown, there may be only one partition 23 and two connecting parts 24. The partition 23 is a vertical plate-like member with a certain thickness. The two connecting parts 24 are respectively connected to the two sides of the partition 23 and are respectively connected to the two end plates 10, thereby forming a cross-shaped structure for the partition plate 20 and a king-shaped structure for the battery air-cooling structure as a whole. Alternatively, there may be multiple partitions 23, with at least some partitions 23 spaced apart, so that there are accommodating areas between the end plates 10 and the partitions 23, and between each partition 23. The connecting parts 24 are located between adjacent partitions 23, allowing the partitions 23 to be connected by the connecting parts 24. Figure 2 As shown, this embodiment has three vertically placed partitions 23, which are spaced apart along the arrangement direction of the end plate 10, so that the end plate 10 and the partitions 23 are arranged in parallel. The connecting part 24 is located between the end plate 10 and the partitions 23, and between each partition 23. The connecting part 24 is located in the middle of the surface of the partition 23, so that the partition plate 20 forms a structure of three cross-shaped splices together. Thus, the partition plate 20 itself forms four accommodating areas, and the partition plate 20 and the end plate 10 together form four accommodating areas, thus forming a total of eight accommodating areas, which can accommodate eight sets of battery cells 30. At the same time, this embodiment has a longitudinally extending connecting hole 22 on the side of the connecting part 24, and a transversely extending connecting hole 22 on the side of the partition 23. Each partition 23 has multiple rows of connecting holes 22 along the height direction.

[0037] In this embodiment, considering the airflow during air cooling, the second flow channel 21 within the partition 23 extends through both ends of the partition 23 along its length. Similarly, the second flow channel 21 within the connecting portion 24 extends through both ends of the connecting portion 24 along its length. Taking the arrangement direction between the end plates 10 and the partition 23 (i.e., the direction of the line connecting the two end plates 10) as the first direction, and the transverse direction along the length of the partition 23 as the second direction, the first and second directions are set at an angle. In this embodiment, the second direction is perpendicular to the first direction; therefore, the second direction is essentially the transverse extension direction of the partition 23. Based on... Figure 2The directions are as follows: the first direction is indicated by the arrow from the lower left to the upper right, and the second direction is indicated by the arrow from the lower right to the upper left. Based on the above, the length direction of the connecting part 24 is the first direction, and the length direction of the dividing part 23 is the second direction. Thus, both ends of the length of the dividing part 23 and the connecting part 24 are open. In this way, when the airflow flows along the second direction, the airflow can directly enter the second flow channel 21 through one end of the dividing part 23. Part of the airflow is distributed and flows within the second flow channel 21, and can enter the first flow channel 11 through the end of the connecting part 24. Some of the airflow can also flow directly out from the opposite end of the dividing part 23. Similarly, in this embodiment, a through hole 12 is provided on the side of the end plate 10 away from the connecting portion 24. The through hole 12 is aligned with the second flow channel 21 of the connecting portion 24. This alignment allows airflow to enter the first flow channel 11 of one end plate 10 through the through hole 12 when airflow moves in the first direction. Airflow then enters the second flow channel 21 via the first flow channel 11, passes through each connecting portion 24 in the first direction, enters the first flow channel 11 of another end plate 10, and exits from the through hole 12 of that other end plate 10. This arrangement allows airflow to flow rapidly within the battery cooling structure, reducing obstruction and enabling the airflow to quickly remove the heat generated by the battery cell 30, thereby improving the cooling effect.

[0038] like Figure 5 and Figure 6 As shown, similar to the arrangement of the second flow channel 21 on the partition 23, in this embodiment, the first flow channel 11 extends through both ends of the end plate 10 along its length. That is, along the second direction, the first flow channel 11 also extends through both ends of the end plate 10, so that the airflow along the second direction can directly enter the end plate 10 through the opening at the end of the end plate 10 and exit from the other end of the end plate 10 through the first flow channel 11. Combined with the aforementioned arrangement of the flow channels on the partition 23 and the connecting part 24, the battery air-cooling structure as a whole can achieve rapid airflow, improving the air-cooling effect.

[0039] The end plate 10 and the separator plate 20 can be connected by welding. For example, the connecting part 24 of the separator plate 20 can be welded to the side of the end plate 10 near the cell, and the through hole 12 on the end plate can be aligned with the second flow channel 21 of the connecting part 24. Alternatively, the side of the end plate 10 near the cell can have a groove, and the connecting part 24 can be welded into the groove. In other possible embodiments, the end plate 10 can also be integrally connected with the separator plate 20, saving assembly steps while ensuring the structural strength of the battery air-cooling structure.

[0040] In this embodiment, the separator plate 20 and the end plates 10 on both sides are integrated and connected, so that the battery air-cooling structure is an integral structure. By adopting this integrated design, the battery air-cooling structure does not need to be welded between the end plates 10, separator plates 20 and other components during production. The finished product can be obtained directly by integrated processing. Furthermore, when assembling the battery cell 30, the battery cell 30 can be directly inserted into the receiving area, which is convenient and quick.

[0041] like Figure 1 As shown, this embodiment also provides a battery pack, including a battery cell 30 and the aforementioned battery air-cooling structure. The battery cell 30 is disposed within the receiving area of ​​the battery air-cooling structure. During design, the size of the receiving area can be designed to be substantially the same as the size of the battery cell 30, so that when the battery cell 30 is installed within the receiving area, the squeezing force of the partition 23 can be used to fix the battery cell 30 within the receiving area. Considering the stability of the battery cell 30 installation, this embodiment uses additional fasteners 40 for further fixation. Specifically, the battery pack also includes fasteners 40. In this embodiment, the fasteners 40 are straps, which are wrapped around the outside of the battery air-cooling structure, passing around the periphery of the end plate 10 and the partition plate 20, and blocking the side opening of the receiving area, thereby preventing the battery cell 30 from coming out of the side of the receiving area. The straps limit the position of the battery cell 30, ensuring that the battery cell 30 is stably housed within the receiving area. Meanwhile, in this embodiment, an arc-shaped transition structure is provided at the end of the end plate 10 along its length. Both ends of the two end plates 10 adopt an arc-shaped structure, which makes the straps wrap around the end plates 10 more smoothly and avoids damage to the straps caused by the end plates 10.

[0042] It should be noted that "multiple" in the above embodiments refers to at least two.

[0043] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0044] 1. It solves the problem of poor cooling effect in existing battery air-cooling structures;

[0045] 2. Flow channels are provided in both the end plate and the partition plate, which can provide a better cooling and heat dissipation effect for the battery cell.

[0046] 3. The connection hole allows airflow to act directly on the outer surface of the battery cell, thereby further improving the cooling effect;

[0047] 4. The design of the flow channels and connecting holes significantly reduces the weight of the battery air-cooling structure, achieving a weight reduction effect;

[0048] 5. The integrated design eliminates the need for welding between components during battery air-cooling structure production, and allows for direct assembly of battery cells, making it convenient and quick.

[0049] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0050] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0051] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0052] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

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