Heat dissipation box and battery pack

Abstract

The utility model is suitable for the technical field of battery equipment, and provides a heat dissipation box and a battery pack. The heat dissipation box comprises a box body which is provided with a heat dissipation space used for installing a heating component; the heat dissipation piece is arranged on the first surface of the box body and is used for exhausting air in the heat dissipation space or introducing air outside the heat dissipation space into the heat dissipation space to dissipate heat; and the ventilation structure is arranged on the second surface of the box body and used for communicating the inside and the outside of the heat dissipation space, and the second surface is adjacent to the first surface. The heat dissipation piece is arranged on the first surface, and the ventilation structure is arranged on the second surface, so that air can be guided to form a flow path similar to an oblique direction, the stroke of the air in the heat dissipation space and the contact opportunity between the air and a heating part are increased through the layout mode, and the heat dissipation efficiency is improved.

Description

Technical Field

[0001] This application belongs to the field of battery equipment technology, and more specifically, relates to a heat dissipation box and a battery pack. Background Technology

[0002] A battery pack is a combination of multiple individual batteries (usually lithium-ion batteries or other secondary batteries) connected in series, parallel, or a combination of series and parallel, and equipped with a battery management system (BMS), protection circuits, casing, and other components to form a battery pack.

[0003] In related technologies, a battery pack includes a heat sink, a heat-generating component (such as a battery module), and a cooling fan. The heat-generating component is installed inside the heat sink, and the cooling fan is mounted on the surface of the heat sink to draw hot air out of the heat sink. An air inlet communicating with the interior of the heat sink is located on a surface opposite to the surface where the cooling fan is mounted. Although the aforementioned heat sink can dissipate heat from the heat-generating component, the heat dissipation effect is poor. Utility Model Content

[0004] The purpose of this application is to provide a heat sink and battery pack, which aims to solve the technical problem of poor heat dissipation effect of heat sinks in related technologies.

[0005] To achieve the above objectives, according to one aspect of this application, a heat dissipation box is provided, comprising: a box body having a heat dissipation space for mounting a heat-generating component; a heat dissipation element disposed on a first surface of the box body for dissipating air from the heat dissipation space or introducing air from outside the heat dissipation space into the heat dissipation space for heat dissipation; and a ventilation structure disposed on a second surface of the box body for communicating between the inside and outside of the heat dissipation space, wherein the second surface is disposed adjacent to the first surface.

[0006] In this application, by placing the heat sink on the first surface and the ventilation structure on the second surface, air can be guided to form a similar oblique flow path, compared to a simple straight flow. This arrangement not only increases the air's travel distance within the heat dissipation space and its contact with the heat-generating components, thus helping to remove heat more effectively and improve heat dissipation efficiency, but also avoids airflow short-circuiting. That is, air will not flow directly and quickly from one side of the heat dissipation space to the other side without sufficient heat exchange with the internal heat-generating components. Instead, under the combined action of the heat sink and the ventilation structure, air flows fully throughout the entire heat dissipation space, thereby improving air utilization efficiency and enhancing the heat dissipation effect.

[0007] Optionally, multiple ventilation structures are provided, and the multiple ventilation structures are spaced apart along the first direction on the second surface. One of two adjacent ventilation structures is located on the side of the other closer to the first surface, and the ventilation area of ​​the multiple ventilation structures gradually changes along the first direction.

[0008] Multiple ventilation structures are spaced apart along the first direction with gradually varying ventilation areas. This structural design ensures appropriate airflow at different locations within the heat dissipation space, resulting in a more uniform temperature distribution and ensuring consistent temperature of the heat-generating components. Specifically, in areas where the heat-generating components generate a large amount of heat, ventilation structures with larger ventilation areas can be used to introduce more cool air for heat dissipation. In areas where the heat generation is low, smaller ventilation areas can still meet the heat dissipation requirements, thus avoiding unnecessary energy loss and improving the overall efficiency of the heat dissipation system. This effectively solves the problem of poor heat dissipation caused by unreasonable ventilation volume.

[0009] Optionally, among the multiple ventilation structures, the two ventilation structures located at the two sides are respectively the first structure and the second structure. The first structure is located on the side of the second structure closer to the heat sink, and the ventilation area of ​​the first structure is smaller than that of the second structure.

[0010] On the one hand, the heat sink drives airflow when it is working. The first structure is close to the heat sink and has a small ventilation area, which makes the air flow relatively slowly. On the other hand, the second structure has a large ventilation area, and the air flows relatively quickly. This structural design can guide the air to form a directional flow from the first structure to the second structure, so that the air flows in an orderly manner along a specific path in the heat dissipation space, thereby more comprehensively covering the heat dissipation space and the heat-generating components, avoiding areas of airflow stagnation, and improving the overall effectiveness of heat dissipation.

[0011] On the other hand, because the first structure has a small ventilation area, the airflow in its area is relatively small, but it can ensure a stable airflow for heat dissipation on the side near the heat sink. The second structure has a large ventilation area, allowing more air to pass through and creating a stronger heat dissipation effect on the other side of the heat dissipation space. This structural design makes the temperature distribution in the heat dissipation space more even from the side near the heat sink to the other side, effectively ensuring the consistency of the temperature of the heat-generating components, avoiding local overheating, and ensuring that the heat-generating components in the entire heat dissipation space can operate in a suitable temperature environment.

[0012] Optionally, the ventilation structure includes a plurality of spaced-apart first ventilation openings, the total area of ​​which forms the ventilation area of ​​the ventilation structure.

[0013] The multiple primary vents not only help to distribute air more evenly into and out of the heat dissipation space; specifically, each primary vent acts as an independent airflow channel, further dispersing airflow during entry and exit, preventing airflow concentration in any one area, thus creating a more uniform airflow distribution within the heat dissipation space and improving heat dissipation uniformity. Furthermore, compared to a large vent, multiple small primary vents can distribute the force on the edge of the primary vent to multiple locations, reducing the pressure on any single part, thereby enhancing the stability of the enclosure structure and mitigating the risk of structural strength degradation due to excessively large primary vents.

[0014] Optionally, the ratio of the number of first ventilation openings in multiple ventilation structures is 8:8:9:12:13:15:14.

[0015] The aforementioned structural design not only enables the air to form a gradient airflow within the heat dissipation space, effectively guiding the air to flow in an orderly manner in a specific direction and avoiding airflow turbulence or stagnation, but also allows the air to flow more comprehensively through all parts of the heat dissipation space, improving the uniformity and effectiveness of heat dissipation. Simultaneously, it creates airflow velocity differences between adjacent ventilation structures, thereby promoting air convection and improving heat dissipation efficiency.

[0016] Optionally, the enclosure has a third surface adjacent to the first and second surfaces; the second surface is also provided with a plurality of second vents, which are spaced apart along the first direction and located on the side of the ventilation structure close to the third surface.

[0017] The second vent, used in conjunction with the ventilation structure, allows for simultaneous heat dissipation from different parts of the heat-generating components. This not only effectively improves heat dissipation efficiency but also ensures a more uniform temperature distribution throughout the entire heat dissipation space, guaranteeing consistent temperatures for the heat-generating components. Furthermore, the spaced second vents along the first direction help guide airflow to create stronger convection, accelerating the removal of hot air, and also balance the airflow distribution within the heat dissipation space, resulting in more even heat dissipation.

[0018] Optionally, the second surface is further provided with a plurality of third ventilation openings, which are spaced apart along the first direction and located on the side of the second ventilation openings close to the third surface.

[0019] The third vent, used in conjunction with the ventilation structure and the second vent, allows for simultaneous heat dissipation from different parts of the heat-generating components. This not only effectively improves heat dissipation efficiency but also ensures a more uniform temperature distribution throughout the entire heat dissipation space, guaranteeing consistent temperatures for the heat-generating components. Furthermore, the third vent's spaced arrangement along the first direction helps guide airflow to form stronger convection, accelerating the exhaust of hot air; it also balances the airflow distribution within the heat dissipation space, resulting in more even heat dissipation.

[0020] Optionally, the enclosure includes a main body and a cover plate. The heat dissipation space and ventilation structure are both located in the main body. The heat dissipation space has a first installation opening and a second installation opening arranged adjacent to each other. The cover plate is detachably located in the main body and is used to block the first installation opening and the second installation opening.

[0021] The designated first and second mounting openings provide convenient access for installing heat-generating components into the heat dissipation space, making the installation process more flexible, reducing installation difficulty, and improving installation efficiency. The removable cover design not only facilitates the manufacturing and assembly of the enclosure, reducing manufacturing and assembly difficulty, but also allows for easy access to the heat-generating components within the heat dissipation space when maintenance, repair, or replacement is required. This significantly shortens maintenance time, reduces maintenance costs, and improves the maintainability of the equipment. The cover sealing the first and second mounting openings effectively improves the enclosure's airtightness, preventing external dust, moisture, and other debris from entering the enclosure and extending the lifespan of the heat dissipation unit.

[0022] Optionally, the enclosure body includes a base and a mounting panel, a heat dissipation space is disposed on the base, and the heat dissipation space also has a heat dissipation opening corresponding to the second mounting opening; the heat dissipation component is mounted on the mounting panel, and the mounting panel is detachably disposed on the base for sealing the heat dissipation opening.

[0023] When assembling the heat sink and heat-generating components, the heat-generating components are first installed on the base. Then, the heat sink and the electrical components that work with it are installed on the mounting panel. Next, the heat sink is installed back on the base to assemble the main body of the heat sink. After connecting the wiring harness, the cover is installed on the assembled main body. Once inspected and approved, the heat sink can be removed from the production line. The detachable base and mounting panel not only further simplify the manufacturing and assembly process of the heat sink and reduce its manufacturing and assembly difficulty, but also allow for adjustments to the size and shape of the heat dissipation space by adjusting the size of the base, mounting panel, and cover to suit different dimensions, shapes, and heat dissipation requirements. This makes the layout design of the heat sink more flexible, enabling personalized heat dissipation solutions to meet diverse application needs.

[0024] Optionally, a heat dissipation duct is provided in the heat dissipation space and communicates with the interior of the heat dissipation space. A heat-generating component is disposed between the heat dissipation duct and the second surface, and the heat dissipation component is used to exhaust the air in the heat dissipation duct.

[0025] The designed heat dissipation duct provides a dedicated channel for the flow of hot air, which helps guide the hot air to flow in a directional manner, allowing the hot air to be discharged more orderly through the heat dissipation duct. This avoids the disorderly diffusion of hot air in the space, improves the heat dissipation efficiency and targeting, effectively reduces the temperature of heat-generating components, and ensures their stable performance.

[0026] Optionally, the enclosure also has a fourth surface disposed opposite to the second surface, and the fourth surface is provided with a plurality of ventilation structures spaced apart along the first direction; a heat dissipation duct and the fourth surface are used to house heat-generating components.

[0027] The combined use of the second and fourth surfaces and the ventilation structure allows outside cold air to enter the heat dissipation space from the second and fourth surfaces respectively. The cold air exchanges heat with the heat-generating components. Meanwhile, the heat generated by the heat-generating components located between the heat dissipation duct and the second and fourth surfaces is converted into hot air, which is then exhausted outwards by the heat sink through the heat dissipation duct, thus forming a complete and efficient convection cycle, greatly improving heat dissipation efficiency. Furthermore, placing the heat-generating components between the heat dissipation duct and the second and fourth surfaces fully utilizes the heat dissipation space, making the overall structure of the heat sink and heat-generating components more compact and rational, contributing to the miniaturization and integration of the assembly.

[0028] According to another aspect of this application, a battery pack is provided, including a plurality of battery modules and the aforementioned heat sink, wherein the plurality of battery modules are spaced apart within the heat dissipation space of the heat sink, and the battery modules are formed as heat-generating components in the heat sink.

[0029] In this application, on the one hand, by placing the heat sink on the first surface and the ventilation structure on the second surface, air can be guided to form a similar oblique flow path, compared to a simple straight flow. This arrangement not only increases the air's travel distance within the heat dissipation space and its contact with the battery module, helping to more effectively remove heat and thus improve heat dissipation efficiency, but also avoids airflow short-circuiting, meaning that air will not flow directly and quickly from one side of the heat dissipation space to the other without sufficient heat exchange with the internal battery module. Instead, under the combined action of the heat sink and the ventilation structure, air flows fully throughout the entire heat dissipation space, thereby improving air utilization efficiency and enhancing the heat dissipation effect.

[0030] On the other hand, multiple ventilation structures are distributed at intervals along the first direction with gradually varying ventilation areas. This structural design ensures appropriate airflow at different locations within the heat dissipation space, resulting in a more uniform temperature distribution throughout the entire heat dissipation space and thus ensuring consistent battery module temperatures. Specifically, in areas where the battery module generates a large amount of heat, ventilation structures with larger ventilation areas can be used to introduce more cool air for heat dissipation. In areas where the heat generation is low, smaller ventilation areas can still meet the heat dissipation requirements, thereby avoiding unnecessary energy loss and improving the overall efficiency of the heat dissipation system. This effectively solves the problem of poor heat dissipation caused by unreasonable ventilation volume.

[0031] Optionally, multiple ventilation structures are provided, and the multiple ventilation structures are spaced apart along a first direction on the second surface; multiple battery modules are spaced apart along a second direction within the heat dissipation space, and the second direction is perpendicular to the first direction; and / or, the heat-generating component includes multiple battery bodies and multiple insulating air guide plates, the multiple battery bodies are spaced apart along the first direction, and the insulating air guide plates are sandwiched between two adjacent battery bodies; the insulating air guide plate includes multiple contact sections and multiple air guide sections spaced apart along a third direction, and the third direction is perpendicular to the first direction; the contact sections contact two adjacent battery bodies; the air guide sections are disposed between two adjacent contact sections and have an air guide gap communicating with the heat dissipation space between them and the two adjacent battery bodies.

[0032] The battery modules are spaced apart along the second direction, allowing air to flow more evenly through each module in the cooling duct and preventing localized heat dissipation problems. Simultaneously, the design, where the second direction is perpendicular to the first direction, alters the airflow path and direction within the cooling space, increasing the complexity and turbulence of airflow and enhancing air convection. Furthermore, arranging multiple battery modules spaced apart along the second direction allows for the efficient arrangement of these modules within a limited cooling space, maximizing space utilization and achieving a compact battery pack layout.

[0033] The designed airflow gaps guide air within the heat dissipation space along specific paths, allowing air to flow more smoothly through each battery cell, improving the targeted and effective heat dissipation and ensuring that heat generated by the battery cells is promptly removed. The insulated airflow guides not only ensure even air distribution among the battery cells, preventing localized overheating or undercooling and helping to maintain the overall temperature uniformity of the battery pack, reducing inconsistent battery performance degradation due to temperature differences, but also improve the consistency and stability of multiple battery cells. Furthermore, they provide insulation and fault isolation, effectively preventing electrical faults such as short circuits between battery cells, improving the safety and reliability of the battery module, and reducing safety risks caused by electrical problems, such as fires and explosions.

[0034] The beneficial effects of the heat dissipation box provided in this application are as follows: In this application, by setting the heat dissipation component on the first surface and the ventilation structure on the second surface, the air can be guided to form a similar oblique flow path, compared to a simple straight flow. This layout not only increases the air's travel distance and contact opportunities with the heat-generating components within the heat dissipation space, helping to more effectively remove heat and thus improve heat dissipation efficiency, but also avoids airflow short-circuiting, i.e., the air will not flow directly and quickly from one side of the heat dissipation space to the other side without sufficient heat exchange with the internal heat-generating components. Instead, under the combined action of the heat dissipation component and the ventilation structure, the air flows fully throughout the entire heat dissipation space, thereby improving air utilization efficiency and enhancing the heat dissipation effect. Attached Figure Description

[0035] 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.

[0036] Figure 1 This is a schematic diagram of the structure of a battery pack with a hidden heat dissipation component provided in an embodiment of this application;

[0037] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0038] Figure 3 This is a front view schematic diagram of a battery pack provided in an embodiment of this application;

[0039] Figure 4 A partially exploded cross-sectional view of a battery pack with a concealed heat dissipation component provided in an embodiment of this application.

[0040] Figure 5 This is a schematic diagram of the structure of the box provided in an embodiment of this application;

[0041] Figure 6 A schematic diagram of the assembled base and heat dissipation duct provided in an embodiment of this application;

[0042] Figure 7 A schematic diagram of the assembled casing, heat dissipation duct, and battery module provided in an embodiment of this application;

[0043] Figure 8 A cross-sectional view of the battery pack provided in this application embodiment after being cut along the plane containing the first direction and the third direction;

[0044] Figure 9 for Figure 8 Enlarged view of point B in the middle;

[0045] Figure 10 This is a schematic diagram of the structure of the insulating air guide plate provided in the embodiment of this application;

[0046] The details of the reference numerals used in the above figures are as follows:

[0047] 100. Enclosure; 110. Enclosure body; 111. Base; 111a. Second surface; 111b. Fourth surface; 112. Mounting panel; 112a. Vent; 112b. First surface; 120. Cover plate; 121. Third surface; 130. Ventilation space; 131. First mounting opening; 132. Second mounting opening; 133. Ventilation opening;

[0048] 200. Heat sink components;

[0049] 300. Ventilation structure; 310. First structure; 320. Second structure; 330. First ventilation opening;

[0050] 400. Second ventilation opening;

[0051] 500. Third ventilation opening;

[0052] 600. Heat dissipation duct; 610. First duct section; 611. First connecting port; 620. Second duct section; 621. Second connecting port;

[0053] 700. Battery module; 710. Battery body; 720. Insulating air guide plate; 721. Contact section; 722. Air guide section; 723. Air guide gap. Detailed Implementation

[0054] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0055] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly or indirectly on that other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to that other element. Unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0056] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and 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. Therefore, they should not be construed as limitations on this application.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0058] As described in the background section, a battery pack refers to a battery assembly formed by combining multiple individual batteries (generally secondary batteries such as lithium-ion batteries) in series, parallel, or a combination of series and parallel connections, and equipping them with a battery management system (BMS), protection circuits, and a casing. In related technologies, a battery pack includes a heat sink, heat-generating components (such as battery modules), and a cooling fan. The heat-generating components are installed inside the heat sink, and the cooling fan is mounted on the surface of the heat sink to draw hot air out of the heat sink. An air inlet, communicating with the interior of the heat sink, is located on a surface opposite to the surface where the cooling fan is mounted. Although the aforementioned heat sink can dissipate heat from the heat-generating components, the heat dissipation effect is not ideal.

[0059] Reference Figures 1 to 6 To address the aforementioned problems, according to one aspect of this application, an embodiment of this application provides a heat dissipation box, which includes a box body 100, a heat dissipation component 200, and a ventilation structure 300. The box body 100 has a heat dissipation space 130 for mounting heat-generating components. The heat dissipation component 200 is disposed on a first surface 112b of the box body 100 for dissipating air from the heat dissipation space 130 or introducing air from outside the heat dissipation space 130 into the heat dissipation space 130 for heat dissipation. The ventilation structure 300 is disposed on a second surface 111a of the box body 100 for communicating between the inside and outside of the heat dissipation space 130. The second surface 111a is disposed adjacent to the first surface 112b.

[0060] In this embodiment, the housing 100 is hollow to form a heat dissipation space 130; the heat-generating component is the battery module 700. In other embodiments, the heat-generating component may be other heat-generating components to be dissipated. The housing 100 is provided with a heat dissipation vent 112a, which communicates with the heat dissipation space 130. The heat dissipation component 200 is a cooling fan or cooling blower, which exhausts air from the heat dissipation space 130 or introduces air from outside the heat dissipation space 130 through the heat dissipation vent 112a. The ventilation structure 300 may be a ventilation hole or a ventilation pipe that connects the inside and outside of the heat dissipation space 130.

[0061] In this application, on the one hand, by placing the heat sink 200 on the first surface 112b and the ventilation structure 300 on the second surface 111a, air can be guided to form a similar oblique flow path, compared to a simple straight flow. This arrangement not only increases the air's travel distance within the heat dissipation space 130 and its contact opportunities with the heat-generating components, thus helping to more effectively remove heat and improve heat dissipation efficiency, but also avoids airflow short-circuiting. That is, air will not flow directly and quickly from one side of the heat dissipation space 130 to the other side without sufficient heat exchange with the internal heat-generating components. Instead, under the combined action of the heat sink 200 and the ventilation structure 300, it flows fully throughout the entire heat dissipation space 130, thereby improving air utilization efficiency and enhancing the heat dissipation effect.

[0062] Reference Figures 1 to 6 In one embodiment, a plurality of ventilation structures 300 are provided, and the plurality of ventilation structures 300 are spaced apart along a first direction on the second surface 111a. One of two adjacent ventilation structures 300 is located on the side of the other closer to the first surface 112b, and the ventilation area of ​​the plurality of ventilation structures 300 gradually changes along the first direction.

[0063] In this embodiment, the first direction is parallel to the length direction of the housing 100. In other embodiments, the first direction may also be parallel to the width direction or the height direction of the housing 100. The ventilation area of ​​the plurality of ventilation structures 300 may gradually increase or decrease as it moves away from the first surface 112b, or it may increase first and then decrease, or it may decrease first and then increase.

[0064] Multiple ventilation structures 300 are spaced apart along the first direction with gradually varying ventilation areas. This structural design ensures adequate airflow at different locations within the heat dissipation space 130, resulting in a more uniform temperature distribution throughout the space and ensuring consistent temperatures for the heat-generating components. Specifically, in areas where the heat-generating components generate a large amount of heat, ventilation structures 300 with larger ventilation areas can be used to introduce more cool air for heat dissipation. In areas where the heat generation is low, smaller ventilation areas can still meet the heat dissipation requirements, thus avoiding unnecessary energy loss and improving the overall efficiency of the heat dissipation system. This effectively solves the problem of poor heat dissipation caused by unreasonable ventilation volume.

[0065] Reference Figure 1 , Figure 2 as well as Figures 5 to 7 In one embodiment, two ventilation structures 300 located at the two side edges of the plurality of ventilation structures 300 are a first structure 310 and a second structure 320, respectively. The first structure 310 is located on the side of the second structure 320 that is closer to the heat sink 200, and the ventilation area of ​​the first structure 310 is smaller than the ventilation area of ​​the second structure 320.

[0066] On the one hand, the heat sink 200 drives airflow during operation. The first structure 310 is close to the heat sink 200 and has a small ventilation area, which makes the airflow relatively slow. On the other hand, the second structure 320 has a large ventilation area, and the airflow is relatively fast. This structural design guides the air to form a directional flow from the first structure 310 to the second structure 320, allowing the air to flow orderly along a specific path within the heat dissipation space 130. This provides more comprehensive coverage of the heat dissipation space 130 and the heat-generating components, avoids areas of stagnant airflow, and improves the overall effectiveness of heat dissipation.

[0067] On the other hand, because the first structure 310 has a small ventilation area, the airflow in its area is relatively small, but it can ensure a stable airflow for heat dissipation on the side near the heat sink 200. The second structure 320 has a large ventilation area, allowing more air to pass through and creating a stronger heat dissipation effect on the other side of the heat dissipation space 130. This structural design makes the temperature distribution in the heat dissipation space 130 more even from the side near the heat sink 200 to the other side, effectively ensuring the temperature consistency of the heat-generating components, avoiding local overheating, and ensuring that the heat-generating components in the entire heat dissipation space 130 can operate in a suitable temperature environment.

[0068] Reference Figure 1 , Figure 2 as well as Figures 5 to 7 In one embodiment, the ventilation structure 300 includes a plurality of spaced-apart first ventilation openings 330, the total area of ​​the plurality of first ventilation openings 330 forming the ventilation area of ​​the ventilation structure 300.

[0069] In this embodiment, the size of the first vent 330 is kept constant to facilitate manufacturing; in other embodiments, the size of the first vent 330 may also be inconsistent.

[0070] The multiple first vents 330 not only help to make air enter or exit the heat dissipation space 130 more evenly; specifically, each first vent 330 can act as an independent airflow channel, making the air more dispersed when entering or exiting, avoiding the airflow from concentrating in a certain area, thereby forming a more uniform airflow distribution within the heat dissipation space 130 and improving the uniformity of heat dissipation. At the same time, compared with a large vent, multiple small first vents 330 can distribute the force on the edge of the first vent 330 to multiple locations, reducing the pressure on a single part, thereby enhancing the structural stability of the enclosure 100 and reducing the risk of a decrease in the structural strength of the enclosure 100 due to an excessively large first vent 330.

[0071] Reference Figure 1 , Figure 2 as well as Figures 5 to 7 In one embodiment, the ratio of the number of first ventilation openings 330 in the plurality of ventilation structures 300 is 8:8:9:12:13:15:14.

[0072] In this embodiment, the number of first vents 330 closest to the heat sink 200 among the multiple ventilation structures 300 is 8. The number of first vents 330 in the remaining ventilation structures 300 that are gradually moved away from the heat sink 200 are 8, 9, 12, 13, 15, and 14, respectively. In other embodiments, the ratio of the number of first vents 330 in the multiple ventilation structures 300 can also be 8:8:9:12:13:15:16, that is, gradually increasing.

[0073] The aforementioned structural design not only enables the air to form a gradient airflow within the heat dissipation space 130, effectively guiding the air to flow in an orderly manner in a specific direction within the heat dissipation space 130 and avoiding airflow turbulence or stagnation, but also allows the air to flow more comprehensively through all parts of the heat dissipation space 130, improving the uniformity and effectiveness of heat dissipation. Simultaneously, it also creates airflow velocity differences between adjacent ventilation structures 300, thereby promoting air convection and improving heat dissipation efficiency.

[0074] Reference Figure 1 , Figure 4 as well as Figure 5In one embodiment, the housing 100 has a third surface 121 disposed adjacent to the first surface 112b and the second surface 111a; the second surface 111a is also provided with a plurality of second vents 400, which are spaced apart along a first direction and located on the side of the ventilation structure 300 near the third surface 121.

[0075] In this embodiment, the multiple second vents 400 are of the same size; in other embodiments, the sizes of the multiple second vents 400 may be different. The second vents 400, used in conjunction with the ventilation structure 300, can simultaneously dissipate heat from different parts of the heat-generating component, effectively improving heat dissipation efficiency and making the temperature distribution within the entire heat dissipation space 130 more uniform, effectively ensuring the consistency of the heat-generating component's temperature. Furthermore, the second vents 400 are spaced apart along the first direction, which not only helps guide air to form stronger convection and accelerate the exhaust of hot air, but also balances the airflow distribution within the heat dissipation space 130, making heat dissipation more even.

[0076] Reference Figure 1 , Figure 4 as well as Figure 5 In one embodiment, the second surface 111a is further provided with a plurality of third ventilation openings 500, which are spaced apart along the first direction and located on the side of the second ventilation opening 400 near the third surface 121.

[0077] In this embodiment, the multiple third vents 500 are of the same size; in other embodiments, the sizes of the multiple third vents 500 may be different. The third vents 500, used in conjunction with the ventilation structure 300 and the second vent 400, can simultaneously dissipate heat from different parts of the heat-generating component, effectively improving heat dissipation efficiency and making the temperature distribution within the entire heat dissipation space 130 more uniform, effectively ensuring the consistency of the heat-generating component's temperature. Furthermore, the third vents 500 are spaced apart along the first direction, which not only helps guide air to form stronger convection and accelerate the exhaust of hot air, but also balances the airflow distribution within the heat dissipation space 130, making heat dissipation more even.

[0078] In addition, to enhance heat dissipation efficiency, the third vents 500 spaced apart along the first direction are provided in two rows. In other embodiments, the third vents 500 spaced apart along the first direction may also be provided in one, three, four or more rows.

[0079] Reference Figures 1 to 7In one embodiment, the enclosure 100 further includes an enclosure body 110 and a cover plate 120. A heat dissipation space 130 and a ventilation structure 300 are both disposed on the enclosure body 110. The heat dissipation space 130 has a first mounting opening 131 and a second mounting opening 132 disposed adjacent to each other. The cover plate 120 is detachably disposed on the enclosure body 110 and is used to block the first mounting opening 131 and the second mounting opening 132.

[0080] In this embodiment, the housing 100 is rectangular in shape, and the second vent 400, the third vent 500, the first surface 112b, and the second surface 111a are all disposed on the housing 110. The cover plate 120 is L-shaped, and the cover plate 120 is provided with ventilation holes that correspond exactly to the third vent 500 to ensure heat dissipation. The area of ​​the first mounting opening 131 is larger than the area of ​​the second mounting opening 132. The heat-generating component is installed into the heat dissipation space 130 through the first mounting opening 131 and the second mounting opening 132. The cover plate 120 is detachably mounted on the housing 110 using connecting screws. When the cover plate 120 is mounted on the housing 110, the cover plate 120 blocks the first mounting opening 131 and the second mounting opening 132.

[0081] The first mounting opening 131 and the second mounting opening 132 provide convenient access for installing the heat-generating components into the heat dissipation space 130, making the installation process more flexible, reducing installation difficulty, and improving installation efficiency. The detachable design of the cover 120 not only facilitates the manufacturing and assembly of the housing 100, reducing manufacturing and assembly difficulty, but also allows for easy opening of the cover 120 to directly address the heat-generating components when maintenance, repair, or replacement is required, significantly shortening maintenance time, reducing maintenance costs, and improving the maintainability of the equipment. The cover 120, by sealing the first mounting opening 131 and the second mounting opening 132, effectively improves the sealing of the housing 100, preventing external dust, moisture, and other debris from entering the housing 100 and extending the service life of the heat dissipation box.

[0082] Reference Figures 1 to 7 In one embodiment, the housing body 110 includes a base 111 and a mounting panel 112. A heat dissipation space 130 is disposed on the base 111, and the heat dissipation space 130 also has a heat dissipation opening 133 corresponding to the second mounting opening 132. A heat dissipation component 200 is mounted on the mounting panel 112, and the mounting panel 112 is detachably disposed on the base 111 for sealing the heat dissipation opening 133.

[0083] In this embodiment, the mounting panel 112 is a complete flat plate. Components such as the heat sink 200, battery management unit, and electrical components are fixedly mounted on the surface of the mounting panel 112 near the base 111. A first surface 112b is disposed on the mounting panel 112. The direction from the second mounting opening 132 to the heat dissipation opening 133 is parallel to the first direction. The mounting panel 112 is detachably mounted on the base 111 using connecting screws. After the mounting panel 112 is mounted on the base 111, it blocks the heat dissipation opening 133. A second surface 111a is disposed on the base 111.

[0084] When assembling the heat sink and heat-generating components, the heat-generating components are first installed on the base 111. Then, the heat sink 200 and the electrical components that work with the heat-generating components are installed on the mounting panel 112. Next, the heat sink 200 is installed on the base 111 to assemble the main body 110. After connecting the wiring harness, the cover plate 120 is installed on the assembled main body 110. Once inspected and approved, the unit can be removed from the production line. The detachable base 111 and mounting panel 112 not only further simplify the manufacturing and assembly process of the heat sink and reduce its manufacturing and assembly difficulty, but also allow for adjustments to the size and shape of the heat dissipation space 130 based on different dimensions, shapes, and heat dissipation requirements. This makes the layout design of the heat sink more flexible, enabling personalized heat dissipation solutions to meet diverse application needs.

[0085] Reference Figures 1 to 7 In one embodiment, a heat dissipation duct 600 communicating with the interior of the heat dissipation space 130 is provided in the heat dissipation space 130. A heat-generating component is disposed between the heat dissipation duct 600 and the second surface 111a. The heat dissipation component 200 is used to exhaust air from the heat dissipation duct 600.

[0086] In this embodiment, the heat dissipation duct 600 is a closed structure, including a first duct section 610 and a second duct section 620. The first duct section 610 is cuboid in shape and is provided with a first connecting port 611 that connects the first duct section 610 to the heat dissipation space 130. Multiple first connecting ports 611 are provided and are spaced apart along a first direction. The second duct is funnel-shaped and is provided with a second connecting port 621 that connects the second duct section 620 to the heat dissipation port 112a.

[0087] The heat dissipation duct 600 provides a dedicated channel for the flow of hot air, which helps to guide the hot air to flow in a directional manner, so that the hot air is discharged more orderly through the heat dissipation duct 600, avoiding the disorderly diffusion of hot air in the space, improving heat dissipation efficiency and targeting, effectively reducing the temperature of heat-generating components, and ensuring their stable performance.

[0088] Reference Figures 1 to 7 In one embodiment, the housing 100 further has a fourth surface 111b disposed opposite to the second surface 111a, and the fourth surface 111b is provided with a plurality of ventilation structures 300 spaced apart along a first direction; a heat dissipation duct 600 is used to dispose of a heat-generating component between it and the fourth surface 111b.

[0089] In this embodiment, the fourth surface 111b is disposed on the base 111, and a plurality of second vents 400 and third vents 500 are also disposed on the fourth surface 111b at intervals along the first direction. The second surface 111a, the fourth surface 111b, and the ventilation structure 300 work together to allow outside cold air to enter the heat dissipation space 130 from the second surface 111a and the fourth surface 111b respectively. The cold air exchanges heat with the heat-generating component. At this time, the heat generated by the heat-generating component located between the heat dissipation duct 600 and the second and fourth surfaces 111a and 111b is converted into hot air, which is then discharged outward by the heat sink 200 through the heat dissipation duct 600, thus forming a complete and efficient convection cycle, greatly improving heat dissipation efficiency. Simultaneously, placing the heat-generating component between the heat dissipation duct 600 and the second and fourth surfaces 111a and 111b fully utilizes the heat dissipation space 130, making the overall structure of the assembly of the heat sink and the heat-generating component more compact and reasonable, contributing to the miniaturization and integration of the assembly.

[0090] Reference Figures 1 to 8 According to another aspect of this application, embodiments of this application also provide a battery pack, which includes a plurality of battery modules 700 and the aforementioned heat dissipation box. The plurality of battery modules 700 are spaced apart within the heat dissipation space 130 of the box 100, and the battery modules 700 are formed as heat-generating components in the heat dissipation box.

[0091] In this embodiment of the application, there are four battery modules 700, two of which are disposed between the heat dissipation duct 600 and the second surface 111a, and the other two are disposed between the heat dissipation duct 600 and the fourth surface 111b.

[0092] In this application, by placing the heat sink 200 on the first surface 112b and the ventilation structure 300 on the second surface 111a, air can be guided to form a similar oblique flow path, compared to a simple straight flow. This arrangement not only increases the air travel distance within the heat dissipation space 130 and the opportunity for contact with the battery module 700, thus helping to remove heat more effectively and improve heat dissipation efficiency, but also avoids airflow short-circuiting. That is, air will not flow directly and quickly from one side of the heat dissipation space 130 to the other side without sufficient heat exchange with the internal battery module 700. Instead, under the combined action of the heat sink 200 and the ventilation structure 300, it flows fully within the entire heat dissipation space 130, thereby improving air utilization efficiency and enhancing the heat dissipation effect.

[0093] Reference Figures 1 to 7 In one embodiment, a plurality of ventilation structures 300 are provided, and the plurality of ventilation structures 300 are spaced apart along a first direction on the second surface 111a; a plurality of battery modules 700 are spaced apart along a second direction within the heat dissipation space 130, the second direction being perpendicular to the first direction.

[0094] In this embodiment, the first direction is parallel to the length direction of the housing 100. In other embodiments, the first direction may also be parallel to the width or height direction of the housing 100. The second direction is parallel to the width direction of the housing 100. In other embodiments, the second direction may also be parallel to the length or height direction of the housing 100. Meanwhile, half of the battery modules 700 are located between the heat dissipation duct 600 and the second surface 111a, and the other half are located between the heat dissipation duct 600 and the fourth surface 111b.

[0095] The battery modules 700 are spaced apart along the second direction, allowing air to flow more evenly through each battery module 700 in the heat dissipation duct 600, preventing localized poor heat dissipation. Simultaneously, the design, where the second direction is perpendicular to the first direction, alters the airflow path and direction within the heat dissipation space 130, increasing the complexity and turbulence of airflow and enhancing air convection. Furthermore, arranging multiple battery modules 700 spaced apart along the second direction allows for the efficient arrangement of these modules within the limited heat dissipation space 130, maximizing space utilization and achieving a compact battery pack layout.

[0096] Reference Figures 1 to 10In one embodiment, a plurality of ventilation structures 300 are provided, and the plurality of ventilation structures 300 are spaced apart along a first direction on the second surface 111a; the heat-generating component includes a plurality of battery bodies 710 and a plurality of insulating air guide plates 720, the plurality of battery bodies 710 are spaced apart along the first direction, and the insulating air guide plates 720 are sandwiched between two adjacent battery bodies 710; the insulating air guide plate 720 includes a plurality of contact sections 721 and a plurality of air guide sections 722 spaced apart along a third direction, the third direction being perpendicular to the first direction; the contact sections 721 contact two adjacent battery bodies 710; the air guide sections 722 are disposed between two adjacent contact sections 721 and have an air guide gap 723 communicating with the heat dissipation space 130 between them.

[0097] In this embodiment, the first direction is parallel to the length direction of the housing 100. In other embodiments, the first direction may also be parallel to the width or height direction of the housing 100. The battery body 710 is a battery cell, and the insulating air guide plate 720 is a plastic plate. In other embodiments, the insulating air guide plate 720 may also be made of other insulating materials. The number of insulating air guide plates 720 is one less than the number of battery bodies 710. Multiple insulating air guide plates 720 are spaced apart along the first direction and clamped and fixed between corresponding adjacent battery bodies 710. The third direction is perpendicular to the second direction. The contact section 721 is in contact with two adjacent battery bodies 710, and the air guide gap 723 corresponds to and is connected to the first communication port 611. In addition, to facilitate the manufacturing and processing of the air guide plate, the insulating air guide plate 720 is an integrally formed part.

[0098] The air guide gap 723 guides the air within the heat dissipation space 130 along a specific path, allowing air to flow more smoothly through each battery unit 710, improving the targeted and effective heat dissipation, and ensuring that the heat generated by the battery unit 710 is carried away in a timely manner. The insulating air guide plate 720 not only ensures that air is evenly distributed among the battery units 710, preventing localized overheating or undercooling, but also helps maintain the overall temperature uniformity of the battery pack, reducing inconsistent battery performance degradation due to temperature differences, and improving the consistency and stability of multiple battery units 710. It also provides insulation and fault isolation, effectively preventing electrical faults such as short circuits between battery units 710, improving the safety and reliability of the battery module 700, and reducing safety risks caused by electrical problems, such as fires and explosions.

[0099] The battery pack provided in this application has the following advantages:

[0100] 1. The heat dissipation space in the heat dissipation box has a large capacity of 130, which can meet the installation and heat dissipation requirements of four or more battery modules 700. It has high energy density and simple overall structure integration of the battery pack.

[0101] 2. The box body is a split design, which simplifies the manufacturing process and makes assembly easy;

[0102] 3. A heat dissipation duct 600 is provided in the middle of the heat dissipation space 130. In conjunction with the air guide plate, the number of the first ventilation port 330, the second ventilation port 400 and the third ventilation port 500 are reasonably designed to effectively control the temperature consistency of the battery body 710.

[0103] 4. The battery pack is easy to integrate. Compared with the dual-module design, the number of electrical components in the battery pack is less, the connection is more reliable, and the safety factor is higher.

[0104] 5. When using a large-capacity battery body 710, the size of the housing 100 can be adjusted according to actual needs to accommodate more battery bodies 710, and the temperature consistency of the battery body 710 can be controlled by adjusting the ventilation area of ​​the housing 100.

[0105] In summary, implementing the heat dissipation box and battery pack provided in this embodiment has at least the following beneficial technical effects: In this application, on the one hand, by setting the heat dissipation component 200 on the first surface 112b and the ventilation structure 300 on the second surface 111a, air can be guided to form a similar oblique flow path, compared to a simple straight flow; this arrangement not only increases the travel distance of air in the heat dissipation space 130 and the opportunity to contact the battery module 700, but also helps to more effectively remove heat, thereby improving heat dissipation efficiency; at the same time, it can also avoid the phenomenon of airflow short-circuiting, that is, air will not flow directly and quickly from one side of the heat dissipation space 130 to the other side without sufficient heat exchange with the internal battery module 700, but under the combined action of the heat dissipation component 200 and the ventilation structure 300, it flows fully in the entire heat dissipation space 130, thereby improving air utilization efficiency and enhancing heat dissipation effect.

[0106] On the other hand, the multiple ventilation structures 300 are distributed at intervals along the first direction with gradually changing ventilation areas. This structural design allows for appropriate airflow at different locations within the heat dissipation space 130, resulting in a more uniform temperature distribution within the entire heat dissipation space 130 and ensuring the consistency of the battery module 700's temperature. Specifically, in areas of the battery module 700 with high heat generation, ventilation structures 300 with larger ventilation areas can be used to introduce more cool air for heat dissipation. In areas with lower heat generation, smaller ventilation areas can still meet the heat dissipation requirements, thereby avoiding unnecessary energy loss and improving the overall efficiency of the heat dissipation system. This effectively solves the problem of poor heat dissipation caused by unreasonable ventilation volume.

[0107] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A heat dissipation box, characterized in that, include: The enclosure has a heat dissipation space for installing heat-generating components; A heat dissipation component is disposed on the first surface of the housing and is used to exhaust air from the heat dissipation space or introduce air from outside the heat dissipation space into the heat dissipation space for heat dissipation. as well as A ventilation structure is provided on the second surface of the enclosure to connect the inside and outside of the heat dissipation space. The second surface is adjacent to the first surface.

2. The heat dissipation box according to claim 1, characterized in that, The ventilation structure is provided in multiple ways, and the multiple ventilation structures are spaced apart along the first direction on the second surface. One of two adjacent ventilation structures is located on the side of the other closer to the first surface, and the ventilation area of ​​the multiple ventilation structures gradually changes along the first direction.

3. The heat dissipation box according to claim 2, characterized in that, Among the plurality of ventilation structures, the two ventilation structures located on the two side edges are respectively the first structure and the second structure. The first structure is located on the side of the second structure closer to the heat sink, and the ventilation area of ​​the first structure is smaller than that of the second structure.

4. The heat dissipation box according to claim 3, characterized in that, The ventilation structure includes a plurality of spaced-apart first ventilation openings, and the total area of ​​the plurality of first ventilation openings forms the ventilation area of ​​the ventilation structure.

5. The heat dissipation box according to claim 4, characterized in that, The ratio of the number of the first ventilation openings in the plurality of ventilation structures is 8:8:9:12:13:15:

14.

6. The heat dissipation box according to claim 2, characterized in that, The housing has a third surface adjacent to the first surface and the second surface; the second surface is also provided with a plurality of second ventilation openings, which are spaced apart along the first direction and located on the side of the ventilation structure close to the third surface.

7. The heat dissipation box according to claim 6, characterized in that, The second surface is also provided with a plurality of third ventilation openings, which are spaced apart along the first direction and located on the side of the second ventilation openings close to the third surface.

8. The heat dissipation box according to claim 2, characterized in that, The enclosure also includes a main body and a cover plate. The heat dissipation space and the ventilation structure are both disposed on the main body. The heat dissipation space has a first installation opening and a second installation opening arranged adjacent to each other. The cover plate is detachably disposed on the main body and is used to block the first installation opening and the second installation opening.

9. The heat dissipation box according to claim 8, characterized in that, The housing body includes a base and a mounting panel. The heat dissipation space is disposed on the base, and the heat dissipation space also has a heat dissipation opening corresponding to the second mounting opening. The heat dissipation component is mounted on the mounting panel, and the mounting panel is detachably disposed on the base for sealing the heat dissipation opening.

10. The heat dissipation box according to any one of claims 2 to 9, characterized in that, The heat dissipation space is provided with a heat dissipation duct that communicates with the interior of the heat dissipation space. The heat dissipation duct and the second surface are used to place the heat-generating component. The heat dissipation component is used to exhaust the air in the heat dissipation duct.

11. The heat dissipation box according to claim 10, characterized in that, The housing also has a fourth surface disposed opposite to the second surface, and the fourth surface is provided with a plurality of ventilation structures spaced apart along the first direction; the heat dissipation duct and the fourth surface are used to dispose of the heat-generating component.

12. A battery pack, characterized in that, The device includes multiple battery modules and a heat dissipation box as described in any one of claims 1 to 11, wherein the multiple battery modules are spaced apart within the heat dissipation space of the box, and the battery modules are formed as the heat-generating components in the heat dissipation box.

13. The battery pack according to claim 12, characterized in that, The ventilation structure is provided in multiple ways, and the multiple ventilation structures are spaced apart along the first direction on the second surface; Multiple battery modules are spaced apart within the heat dissipation space along a second direction perpendicular to the first direction; and / or, The heating component includes multiple battery bodies and multiple insulating air guide plates. The multiple battery bodies are spaced apart along the first direction, and the insulating air guide plates are sandwiched between two adjacent battery bodies. The insulating air guide plate includes multiple contact sections and multiple air guide sections spaced apart along a third direction, the third direction being perpendicular to the first direction; the contact sections contact two adjacent battery bodies; the air guide sections are disposed between two adjacent contact sections and have an air guide gap communicating with the heat dissipation space between them and the two adjacent battery bodies.

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