Battery box body, battery system and battery cluster system

Abstract

The utility model provides a battery box body, a battery system and a battery cluster system.The battery box body comprises a box body, an air duct and cooling fins, the box body is used for containing batteries, and the box body is provided with a bottom; the air channel is arranged on the outer side of the bottom, the heat dissipation fins are distributed in the air channel, the air channel is provided with an air inlet, the distribution area of the heat dissipation fins in the air channel comprises a first area and a second area, the distance between the first area and the air inlet is smaller than the distance between the second area and the air inlet, and the heat dissipation fins are distributed in the air channel. The distribution density of the radiating fins in the first area is smaller than that of the radiating fins in the second area, so that the heat exchange amount in the first area can be reduced, the thermal cascade from the first area to the second area is reduced, and the temperature difference in the box body is reduced.

Description

Technical Field

[0001] This application belongs to the field of energy storage system technology, and in particular relates to a battery box, a battery system and a battery cluster system. Background Technology

[0002] Battery thermal management has a significant impact on battery life. Currently, air cooling is commonly used to cool batteries. However, when air cooling systems are used to cool batteries, the cooling effect is poor, and the temperature difference within a single battery pack is large. Summary of the Invention

[0003] To address the aforementioned issues, embodiments of this application provide a battery housing, a battery system, and a battery cluster system, which can reduce the temperature difference within the battery housing.

[0004] In a first aspect, embodiments of this application provide a battery housing, comprising: a housing body, an air duct, and heat dissipation fins. The housing body is used to accommodate a battery and has a bottom. The air duct is disposed on the outer side of the bottom, and the heat dissipation fins are distributed in the air duct. The air duct has an air inlet, and the distribution area of ​​the heat dissipation fins in the air duct includes a first area and a second area. The distance between the first area and the air inlet is less than the distance between the second area and the air inlet, and the distribution density of the heat dissipation fins in the first area is less than the distribution density of the heat dissipation fins in the second area.

[0005] In some embodiments, the heat dissipation fins include: first heat dissipation fins and second heat dissipation fins, each of the first heat dissipation fins extending from the first region to the second region, the second heat dissipation fins being disposed in the second region, and each of the second heat dissipation fins being located between two adjacent first heat dissipation fins.

[0006] In some embodiments, the housing body has a first sidewall and a second sidewall, the first sidewall and the second sidewall are connected to the bottom, the first sidewall and the second sidewall are connected, and the first sidewall, the second sidewall and the bottom form a receiving space for accommodating a battery.

[0007] In some embodiments, the air duct has an air outlet disposed on a second side wall, the air inlet is a first distance from another second side wall, and the air inlet is a second distance from the second side wall on which the air inlet is disposed, wherein the first distance is less than the second distance.

[0008] In some embodiments, the battery housing further includes an air outlet decorative element, which is used to guide the gas output from the air outlet in a preset direction, wherein the angle between the preset direction and the second sidewall is less than 90°.

[0009] In some embodiments, the battery housing further includes a fan disposed in the air duct, the fan being a third distance from the air inlet and a fourth distance from the air outlet, the fourth distance being less than the third distance.

[0010] In some embodiments, the housing body further includes a top, which is disposed opposite to the bottom and has an opening.

[0011] Secondly, embodiments of this application provide a battery system, including: a plurality of battery housings provided in the first aspect, wherein the plurality of battery housings are stacked sequentially.

[0012] In some embodiments, the battery system further includes a cover plate disposed over an opening in the uppermost battery housing.

[0013] Thirdly, embodiments of this application provide a battery cluster system, including: a plurality of battery systems provided in the second aspect.

[0014] The beneficial effects of the embodiments in this application compared with the prior art are:

[0015] The battery housing provided in this application embodiment includes: a housing body, an air duct, and heat dissipation fins. The housing body is used to accommodate the battery and has a bottom. The air duct is disposed on the outer side of the bottom, and the heat dissipation fins are distributed in the air duct. The air duct has an air inlet, and the distribution area of ​​the heat dissipation fins in the air duct includes a first area and a second area. The distance between the first area and the air inlet is less than the distance between the second area and the air inlet. The distribution density of the heat dissipation fins in the first area is less than the distribution density of the heat dissipation fins in the second area, which can reduce the heat exchange in the first area, thereby reducing the thermal cascading from the first area to the second area and reducing the temperature difference inside the housing.

[0016] It is understood that the beneficial effects of the second and third aspects mentioned above can be found in the relevant descriptions in the first aspect mentioned above, and will not be repeated here. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a top view schematic diagram of the structure of a battery box provided in an embodiment of this application;

[0019] Figure 2 This is a bottom view of the structure of a battery box provided in an embodiment of this application;

[0020] Figure 3 A schematic diagram of a heat dissipation fin provided for an embodiment of the application;

[0021] Figure 4 This is a schematic diagram of the structure of a battery box provided in an embodiment of this application;

[0022] Figure 5 This is a structural schematic diagram of an air outlet decorative component provided in an embodiment of this application;

[0023] Figure 6 This is a schematic diagram of the structure of a battery box provided in an embodiment of this application;

[0024] Figure 7 This is a schematic diagram of the structure of a battery system provided in an embodiment of this application;

[0025] Figure 8 This is a schematic diagram of a battery cluster system provided in an embodiment of this application;

[0026] 1. Housing body; 2. Heat dissipation fins; 21. First heat dissipation fin; 22. Second heat dissipation fin; 32. Air inlet; 31. Air outlet; 4. Air outlet decorative piece; 5. Fan. Detailed Implementation

[0027] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0028] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0029] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0030] As used in this application specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrases "if determined" or "if detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once detected," or "in response to detection."

[0031] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] References to "one embodiment" or "some embodiments" in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized.

[0033] Based on the technical problems in related technologies, this application provides a battery housing. Figure 1 This is a top view schematic diagram of the structure of a battery box provided in an embodiment of this application. Figure 2 This is a bottom view of the structure of a battery box provided in an embodiment of this application, as shown below. Figures 1 to 2 As shown, the battery housing includes: a housing body 1, an air duct, and heat dissipation fins 2. The housing body 1 is used to house the battery and has a bottom. The air duct is located on the outer side of the bottom, and the heat dissipation fins 2 are distributed in the air duct. The air duct has an air inlet 32. The distribution area of ​​the heat dissipation fins 2 in the air duct includes a first area and a second area. The distance between the first area and the air inlet 32 ​​is less than the distance between the second area and the air inlet 32. The distribution density of the heat dissipation fins 2 in the first area is less than the distribution density of the heat dissipation fins 2 in the second area.

[0034] In this embodiment, the main function of the housing body 1 is to house the battery. The housing body 1 provides a space to protect and secure the battery, preventing physical damage or external environmental influences. The housing body can be rectangular. It can be made of aluminum alloy or stainless steel.

[0035] In this embodiment, the air duct can be directly integrated into the bottom structure. It can be sealed to the bottom using a baffle to form the air duct.

[0036] In this embodiment, the main function of the air duct is to guide airflow for effective heat dissipation. When air passes through the air duct, it carries away heat from the heat dissipation fins 2, thereby reducing the battery temperature. The heat dissipation fins 2 are mainly used to increase the heat dissipation area. The first region is closer to the air inlet 32, so the distribution density of the heat dissipation fins 2 is lower; while the second region is farther from the air inlet 32, so the distribution density of the heat dissipation fins 2 is higher. This design ensures that air can carry away heat evenly when flowing through the air duct, avoiding localized overheating.

[0037] In this embodiment, the air inlet allows outside air to enter the air duct and exchange heat with the heat dissipation fins 2. The air inlet is designed to ensure that air flows evenly into the first area of ​​the heat dissipation fins.

[0038] In some embodiments, the housing body and the heat dissipation fins can be manufactured as a single piece.

[0039] The housing structure provided in this application embodiment achieves effective heat dissipation for the battery through a rationally designed air duct and heat dissipation fin distribution density. The different distribution densities of the heat dissipation fins 2 in the first and second regions can reduce the heat exchange in the first region, thereby reducing thermal cascading from the first region to the second region and lowering the temperature difference within the housing.

[0040] In some embodiments, Figure 3 A schematic diagram of a heat dissipation fin provided in the application embodiment, as shown below. Figure 3 As shown, the heat dissipation fin 2 includes: a first heat dissipation fin 21 and a second heat dissipation fin 22. Each first heat dissipation fin 21 extends from a first region to a second region, and the second heat dissipation fin 22 is disposed in the second region. Each second heat dissipation fin 22 is located between two adjacent first heat dissipation fins 21.

[0041] The enclosure structure provided in this application embodiment can ensure that air can carry away heat evenly when flowing through the air duct, thereby improving heat dissipation efficiency.

[0042] In some embodiments, the housing body 1 has a first sidewall and a second sidewall, the first sidewall and the second sidewall are connected to the bottom, the first sidewall and the second sidewall are connected, and the first sidewall, the second sidewall and the bottom form a receiving space for accommodating the battery.

[0043] In this embodiment, the first sidewall may be perpendicular or approximately perpendicular to the bottom and connected to the bottom. The second sidewall is also perpendicular or approximately perpendicular to the bottom and connected to the bottom. The second sidewall is adjacent to the first sidewall and together provides a boundary for the accommodating space.

[0044] In this embodiment, the size and shape of the accommodating space are typically designed according to the size and number of batteries to ensure that the batteries can be securely fixed inside the casing.

[0045] In some embodiments, see continue to see Figure 1 The air duct has an air outlet 31, which is located on a second side wall. Figure 4 This is a schematic diagram of the structure of a battery box provided in an embodiment of this application, as shown below. Figure 4 As shown, the distance between the air inlet 32 ​​and the other second side wall is the first distance, and the distance between the air inlet 32 ​​and the second side wall where the air outlet 31 is located is the second distance. The first distance is less than the second distance.

[0046] The housing structure provided in this application embodiment allows airflow to be drawn into the internal air duct from the air inlet at the bottom rear side of the housing, and then blown out from the side of the PACK housing.

[0047] In this embodiment, by making the first distance smaller than the second distance, the smaller first distance allows the air inlet 32 ​​to be closer to a certain edge or corner of the housing, which helps guide air into the air duct in a specific way. The larger second distance allows the air to have a longer path when flowing through the heat dissipation fins, thereby increasing the opportunity and time for heat exchange. By rationally designing the positions of the air inlet and outlet and the distance between them, more efficient heat dissipation can be achieved.

[0048] In some embodiments, Figure 5 This is a structural schematic diagram of an air outlet decorative component provided in an embodiment of this application, as shown below. Figure 5 As shown, the battery housing also includes an air outlet decorative piece 4, which is used to guide the gas output from the air outlet 31 in a preset direction, wherein the angle between the preset direction and the second side wall is less than 90°.

[0049] In this embodiment, the main function of the air outlet decorative component is to guide the gas output from the air outlet 31 towards a preset direction. This not only improves the heat dissipation effect of the enclosure but also reduces the interference of airflow on the surrounding environment, thereby improving the overall airflow organization efficiency. The preset direction refers to the desired direction of gas outflow determined during the design of the air outlet decorative component 4. The angle between this preset direction and the second side wall (i.e., the side wall where the air outlet 31 is located) is less than 90°. This ensures that the gas does not flow directly perpendicular to the second side wall but rather flows out at a smaller angle. For example, the angle here can be 45°.

[0050] In this embodiment, the air outlet decorative component 4 may include: a decorative component frame and an air guide plate. The decorative component frame is used to be installed on the air outlet, and the air guide plate is fixed on the decorative component frame.

[0051] The battery housing provided in this application embodiment can improve the heat dissipation effect and airflow organization efficiency of the housing by setting the air outlet decorative parts so that the output gas flows in a preset direction.

[0052] In some embodiments, Figure 6 This is a schematic diagram of the structure of a battery box provided in an embodiment of this application, as shown below. Figure 6 As shown, the battery housing also includes a fan 5, which is installed in the air duct. The distance between the fan 5 and the air inlet 32 ​​is the third distance, and the distance between the fan 5 and the air outlet 31 is the fourth distance. The fourth distance is less than the third distance.

[0053] In this embodiment, the fan 5 is disposed in the air duct, and its main function is to accelerate the airflow in the air duct, thereby improving heat dissipation efficiency. Through forced convection, the fan can ensure that air can flow over the heat dissipation fins more quickly, carrying away more heat.

[0054] In this embodiment, the distance between the fan 5 and the air inlet 32 ​​is designated as the third distance, and the distance between the fan 5 and the air outlet 31 is designated as the fourth distance. The fourth distance is smaller than the third distance, allowing the fan to be closer to the air outlet. Positioning the fan near the air outlet ensures that the air heated by the heat sink fins can be expelled from the casing more quickly, thus preventing excessive heat buildup inside the air duct.

[0055] In some embodiments, the housing body 1 further includes a top, which is disposed opposite to the bottom and has an opening.

[0056] In this embodiment of the application, by setting an opening, when multiple battery boxes overlap, the air duct of the upper battery box can be closer to the lower battery, thereby further improving the heat dissipation effect.

[0057] Based on the battery housings provided in the foregoing embodiments, this application provides another battery system in which multiple battery housings are stacked together in sequence to form a battery system. Figure 7 This is a schematic diagram of the structure of a battery system provided in an embodiment of this application, such as... Figure 7 As shown, three battery housings are stacked together to form a battery system. During stacking, the air outlets are located on the same side. The number of stacked layers depends primarily on the system's power configuration or local regulatory requirements. The heat dissipation between the stacked battery housings operates independently in parallel, and there are no thermal stages along the stacking direction.

[0058] In some embodiments, the battery system further includes a cover plate disposed over an opening in the uppermost battery housing.

[0059] In this embodiment, the cover is positioned over the opening of the topmost battery housing. Its primary function is to seal the top opening of the battery housing, thereby protecting the battery from external environmental influences such as dust, moisture, and vibration. Simultaneously, the cover also provides a degree of protection against accidental impacts or damage to the battery. The cover is typically made of a material similar to the battery housing to ensure its strength, corrosion resistance, and durability. These materials may include metals (such as aluminum alloys and stainless steel) or composite materials (such as carbon fiber reinforced composites and glass fiber reinforced composites).

[0060] Based on the foregoing embodiments, this application provides another battery cluster system, which includes multiple battery systems that can be arranged in an array.

[0061] In the embodiments of this application, Figure 8 This is a schematic diagram of a battery cluster system provided in an embodiment of this application, such as... Figure 8 As shown, by stacking and arranging the array, heat dissipation can be achieved with a smaller air outlet distance, which can reduce the distance of the PACK stack in parallel.

[0062] The method provided in this application embodiment, by setting the air duct to have an air outlet 31, the air outlet 31 is set on a second side wall, the air inlet 32 ​​is at a first distance from another second side wall, and the air inlet 32 ​​is at a second distance from the second side wall where the air inlet 31 is set, the first distance is less than the second distance, which can reduce the area occupied after parallel operation.

[0063] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A battery housing, characterized in that, include: The enclosure body (1), the air duct, and the heat dissipation fins (2) are provided. The enclosure body (1) is used to house the battery and has a bottom. The air duct is located on the outside of the bottom and the heat dissipation fins (2) are distributed in the air duct. The air duct has an air inlet (32). The distribution area of ​​the heat dissipation fins (2) in the air duct includes a first area and a second area. The distance between the first area and the air inlet (32) is less than the distance between the second area and the air inlet (32). The distribution density of the heat dissipation fins (2) in the first area is less than the distribution density of the heat dissipation fins (2) in the second area.

2. The battery housing according to claim 1, characterized in that, The heat dissipation fins (2) include: first heat dissipation fins (21) and second heat dissipation fins (22), each of the first heat dissipation fins (21) extending from the first region to the second region, the second heat dissipation fins (22) being disposed in the second region, and each of the second heat dissipation fins (22) being located between two adjacent first heat dissipation fins (21).

3. The battery housing according to claim 1, characterized in that, The housing body (1) has a first sidewall and a second sidewall, the first sidewall and the second sidewall are connected to the bottom, the first sidewall and the second sidewall are connected, and the first sidewall, the second sidewall and the bottom form a receiving space, the receiving space is used to receive the battery.

4. The battery housing according to claim 3, characterized in that, The air duct has an air outlet (31) which is located on a second side wall. The distance between the air inlet (32) and the other second side wall is a first distance, and the distance between the air inlet (32) and the second side wall where the air outlet (31) is located is a second distance. The first distance is less than the second distance.

5. The battery housing according to claim 4, characterized in that, The battery housing further includes an air outlet decorative piece (4), which is used to guide the gas output from the air outlet (31) in a preset direction, wherein the angle between the preset direction and the second side wall is less than 90°.

6. The battery housing according to claim 4, characterized in that, The battery housing also includes a fan (5), which is disposed in the air duct. The distance between the fan (5) and the air inlet (32) is a third distance, and the distance between the fan (5) and the air outlet (31) is a fourth distance. The fourth distance is less than the third distance.

7. The battery housing according to any one of claims 1 to 6, characterized in that, The box body (1) further includes a top, which is disposed opposite to the bottom and has an opening.

8. A battery system, characterized in that, include: The battery housing according to any one of claims 1 to 7, wherein the plurality of battery housings are stacked sequentially.

9. The battery system according to claim 8, characterized in that, The battery system also includes a cover plate disposed on the opening of the uppermost battery housing.

10. A battery cluster system, characterized in that, include: The battery system according to any one of claims 8 to 9.

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