Heat dissipation structure and energy storage device

Abstract

The application provides a heat dissipation structure and an energy storage device, and belongs to the technical field of batteries. The heat dissipation structure comprises: a first heat dissipation channel, which has a first air cavity, a first air inlet and a first air outlet that are all in communication with the first air cavity, the first air inlet and the first air outlet are respectively located at two ends of the first air cavity in a first direction, and the first air cavity is used for accommodating a first heat dissipation part; a fan, which is used for introducing air flow from the first air inlet into the first heat dissipation channel; a second heat dissipation channel, which is arranged between the first heat dissipation channel and a second heat dissipation part in a second direction, the second direction is perpendicular to the first direction, the second heat dissipation channel has a second air cavity, an air duct air inlet and an air duct air outlet that are all in communication with the second air cavity, and the air duct air inlet and the air duct air outlet are arranged in a spaced manner along the first direction and are all in communication with the first air cavity. The heat dissipation structure can avoid the problem that adjacent heat dissipation parts are affected by heat and are disabled.

Description

Technical Field

[0001] This application relates to the field of heat dissipation technology, and in particular to a heat dissipation structure and energy storage device. Background Technology

[0002] To ensure equipment operates within a suitable temperature environment or to prevent overheating, heat dissipation ducts are typically installed for heat-generating components. To save space, some devices place two components requiring heat dissipation close together and share a single heat dissipation channel. For example, in energy storage devices, the power module and battery module are two adjacent components requiring heat dissipation, and current technology typically uses a single heat dissipation duct to cool both.

[0003] However, this shared cooling airflow can cause the two components to overheat and affect each other, leading to the failure of the components. Utility Model Content

[0004] One objective of this invention is to provide a heat dissipation structure that can address the problem of two adjacent components failing due to mutual heat interference.

[0005] A further objective of this invention is to further enhance the heat dissipation effect.

[0006] Another objective of this invention is to provide an energy storage device including the above-described heat dissipation structure to avoid the problem of battery components and power components failing due to mutual heat interference.

[0007] Another objective of this invention is to enable rapid installation of battery modules.

[0008] Another objective of this invention is to improve the flexibility of battery module assembly.

[0009] Specifically, according to one aspect of this application, a heat dissipation structure is provided, comprising: The first heat dissipation channel has a first air cavity, and a first air inlet and a first air outlet, both of which are connected to the first air cavity. The first air inlet and the first air outlet are respectively located at both ends of the first air cavity in a first direction. The first air cavity is used to accommodate a portion of the first heat dissipation component. A fan is used to draw airflow from the first air inlet into the first heat dissipation channel. The second heat dissipation channel is disposed between the first heat dissipation channel and the second heat dissipation component in a second direction, the second direction being perpendicular to the first direction. The second heat dissipation channel has a second air cavity, and an air duct inlet and an air duct outlet that are both connected to the second air cavity. The air duct inlet and the air duct outlet are arranged at intervals along the first direction and are both connected to the first air cavity.

[0010] Optionally, the second heat dissipation channel includes an air inlet sidewall facing the first heat dissipation channel, and the air inlet and air outlet of the air duct are disposed at both ends of the air inlet sidewall in the first direction.

[0011] Optionally, an extended air duct baffle is provided at the air inlet sidewall. The air duct baffle is located downstream of the air duct inlet, and the distance between the baffle and the air duct inlet is less than a preset value.

[0012] Optionally, both the air inlet and the air outlet of the air duct include multiple through holes.

[0013] Optionally, the fan is installed at the first air inlet, and a plurality of the fans are arranged along the second direction.

[0014] Optionally, the heat dissipation structure further includes an air inlet housing, which is disposed at one end of the first heat dissipation channel where the first air inlet is located. The air inlet housing, together with the side of the first heat dissipation component, the first heat dissipation channel, and the second heat dissipation component, forms a side air inlet channel. Both ends of the side air inlet channel along the second direction are provided with main air inlets, and the side air inlet channel is connected to the first heat dissipation channel.

[0015] Optionally, the heat dissipation structure further includes an air outlet housing, which is disposed at the end of the first heat dissipation channel where the first air outlet is located. The air outlet housing, together with the side of the first heat dissipation component, the first heat dissipation channel, and the second heat dissipation component, forms a side air outlet duct, and the side air outlet duct is provided with a main air outlet.

[0016] In particular, according to another aspect of this application, an energy storage device is also provided, including a first heat-dissipating component and a second heat-dissipating component, as well as the battery heat dissipation structure described in any of the above. The first heat-dissipating component is a battery assembly, and the second heat-dissipating component is a power assembly. The battery assembly and the power assembly are arranged side by side along a first direction. The power assembly includes a power module and a heat sink arranged sequentially along a third direction. The heat sink is located in the first air cavity of the first heat dissipation channel. The third direction, the second direction, and the first direction are perpendicular to each other.

[0017] Optionally, the battery assembly includes a battery housing, a fixing component and a battery module disposed within the battery housing, the fixing component including a wedge-shaped retaining assembly fixedly disposed within the battery housing, the wedge-shaped retaining assembly forming a slot for supporting the battery module, and the fixing component further including a plurality of fasteners for fixing the battery module to the wedge-shaped retaining assembly.

[0018] Optionally, the battery module includes: Multiple sub-modules, including multiple individual battery cells arranged in sequence; Multiple insulating sheets are disposed between adjacent sub-modules; Two module positioning components are disposed on opposite sides of the plurality of sub-modules and are connected to each of the sub-modules.

[0019] According to one aspect of the present invention, a heat dissipation structure is provided, which includes a first heat dissipation channel for accommodating a first heat dissipation component, and a second heat dissipation channel is provided between the second heat dissipation component and the first heat dissipation channel, so that the heat dissipation channels between the first heat dissipation component and the second heat dissipation component are isolated from each other, so that the heat between the two heat dissipation components is not easily affected by each other, thereby avoiding failure of the heat dissipation component.

[0020] Furthermore, when the aforementioned heat dissipation structure is applied to energy storage devices, it prevents heat from the power module from being easily transferred to the battery module. The continuously cooled air blown into the second heat dissipation channel continuously cools the battery module, thus improving its safety and lifespan. Additionally, in the event of thermal runaway in the battery module, the heat will be carried away by the cool air in the second heat dissipation channel, preventing any impact on the power module. Ultimately, this ensures that the heat from the power module and battery module does not affect each other, maintaining a favorable temperature environment, protecting both the power module and battery module, and avoiding circuit corrosion problems caused by the power module and battery module sharing a heat dissipation channel.

[0021] Furthermore, by setting a baffle at the air inlet of the air duct, a portion of the airflow entering from the first air inlet of the first heat dissipation channel can be gathered at the air inlet of the air duct, thus ensuring the airflow in the second heat dissipation channel.

[0022] Furthermore, outside air enters the side air intake duct through the two main air intakes and then flows into the first heat dissipation channel. Therefore, when the air flows in the side air intake duct, it can also carry away some of the heat from the battery components and power components, thus enhancing the heat dissipation effect.

[0023] According to another aspect of this utility model, the battery module is first positioned at the bottom by a wedge-shaped bracket assembly. The battery module can be positioned by simply placing it into the slot of the wedge-shaped bracket assembly, and then fixed by fasteners. Therefore, the assembly is simple and can realize the rapid installation of the battery module.

[0024] According to another aspect of the present invention, the energy storage device includes multiple sub-modules, each sub-module including multiple individual battery cells, which is conducive to mass production and the assembly method is flexible, realizing the combination of different numbers of battery cells or sub-modules. Attached Figure Description

[0025] Figure 1 This is an exploded structural diagram of an energy storage device according to an embodiment of the present invention; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 This is a cross-sectional structural schematic diagram of an energy storage device according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the airflow direction of an energy storage device according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the installation structure of the battery assembly of an energy storage device according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of a battery module of an energy storage device according to an embodiment of the present invention; Figure 7 This is an exploded view of a sub-module of an energy storage device according to an embodiment of the present invention; Figure 8 This is a flow field simulation diagram of an energy storage device according to an embodiment of the present invention; Figure 9 This is a temperature simulation diagram of an energy storage device according to an embodiment of the present invention; Figure label: Energy storage device 100, battery pack 10, power pack 20, power module 21, heat sink 22, first heat dissipation channel 30, first air outlet 301, fan 40, second heat dissipation channel 50, air duct inlet 501, air duct outlet 502, air inlet sidewall 51, air duct baffle 52, air duct housing 31, bottom side 53, power housing 211, control chip 212, air inlet housing 60, side air inlet duct 601, main air inlet... Air vent 602, air outlet housing 70, side air outlet duct 701, main air outlet 702, battery housing 11, battery module 13, card slot 121, fastener 14, sub-module 131, single cell 101, insulating sheet 132, module positioning component 133, through hole 110, wedge-shaped card holder bracket 12, mounting hole 120, first insulating sheet 102, fixed side plate 103, second insulating sheet 104, binding steel strap 105. Detailed Implementation

[0026] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not the entire structure. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0027] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0028] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed description. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art have not been described in detail in order to highlight the spirit of this disclosure.

[0029] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article indicates that the preceding and following related objects have an "or" relationship.

[0030] In this application's embodiments, "multiple" refers to two or more. The descriptions of "first," "second," etc., appearing in this application's embodiments are merely illustrative and for distinguishing the described objects; they have no order and do not indicate a specific limitation on the number in this application's embodiments, nor do they constitute any limitation on the embodiments of this application.

[0031] Figure 1 This is an exploded structural diagram of an energy storage device 100 according to an embodiment of the present invention. Figure 2 for Figure 1 A magnified view of a portion of point A in the middle. Figure 3 This is a cross-sectional structural schematic diagram of an energy storage device 100 according to an embodiment of the present invention. Figure 4 This is a schematic diagram of the airflow direction of an energy storage device 100 according to an embodiment of the present invention. Figure 1 As shown, the heat dissipation structure of this embodiment is used in an energy storage device 100 in which the battery assembly 10 and the power assembly 20 are arranged side by side. That is, in this embodiment, the power assembly 20 is the first heat-dissipating component, and the battery assembly 10 is the second heat-dissipating component. Of course, this heat dissipation structure can also be used in other devices or equipment with similar arrangements of heat-dissipating components, and is not limited here. The power assembly 20 is in the second direction (see...). Figure 1 The power assembly 20 is disposed on one side of the battery assembly 10 along the X-axis direction (see the image). Figure 1 In the Z-axis direction, a power module 21 and a heat sink 22 are arranged sequentially. The power module 21 generally includes a power housing 211 and a control chip 212 located inside the power housing 211. The heat sink 22 is used to dissipate heat from the power module 21. The third direction is perpendicular to the second direction. The battery assembly 10 may include multiple battery cells combined in a certain form. The multiple battery cells are generally placed inside the battery housing 11.

[0032] The battery heat dissipation structure of this embodiment includes a first heat dissipation channel 30, a fan 40, and a second heat dissipation channel 50. The first heat dissipation channel 30 has a first air cavity, and a first air inlet and a first air outlet 301, both of which are connected to the first air cavity. The first air inlet and the first air outlet 301 are respectively located in the first air cavity in a first direction (see...). Figure 1The first air chamber is located at both ends of the first air inlet (in the Y-axis direction) and is used to house the heat sink 22. The third direction, the first direction, and the second direction are perpendicular to each other. The fan 40 is used to introduce airflow from the first air inlet into the first heat dissipation channel 30. Depending on the size of the power component 20, the number of fans 40 can be one or more. In this embodiment, the fan 40 is installed at the first air inlet, and two fans 40 are arranged along the second direction. Of course, in other embodiments not shown, the fans 40 can also be arranged in other positions, as long as they can introduce airflow into the first heat dissipation channel 30. In the second direction, the second heat dissipation channel 50 is disposed between the first heat dissipation channel 30 and the battery component 10, and is used to block the battery component 10 and the first heat dissipation channel 30. The second heat dissipation channel 50 has a second air chamber, and an air duct inlet 501 and an air duct outlet 502, both of which are connected to the second air chamber. The air duct inlet 501 and the air duct outlet 502 are located at both ends of the first direction. Figure 2 As shown, both the air inlet 501 and the air outlet 502 of the air duct in this embodiment include multiple through holes. In this embodiment, from a third-party perspective, the battery assembly 10 and the power module 21 have a height difference. The power module 21 has an air duct housing 31 on the side where the heat sink 22 is located. The air duct housing 31, the second heat dissipation channel 50, and the power housing 211 together define the first heat dissipation channel 30.

[0033] In this embodiment, the second heat dissipation channel 50 is used to block the battery assembly 10 and the first heat dissipation channel 30. This should be understood as follows: the airflow in the first heat dissipation channel 30 can only flow into the second heat dissipation channel 50 through the air inlet 501 on the second heat dissipation channel 50, and flow out of the second heat dissipation channel through the air outlet 502. The airflow in the first heat dissipation channel 30 cannot enter the battery assembly 10 from other positions.

[0034] like Figure 4 As shown, after the airflow enters the first heat dissipation channel 30 through the fan 40, part of the gas flows through the radiator 22 to the first air outlet within the first heat dissipation channel 30 to carry away the heat transferred from the power module 21 to the radiator 22; another part of the gas enters the second heat dissipation channel 50 through the air inlet 501 and flows back to the first heat dissipation channel 30 from the air outlet 502 to carry away the heat from the cells inside the battery pack 10. To extend the flow length of the gas within the second heat dissipation channel 50 and carry away more heat from the battery pack 10, the air inlet 501 and the air outlet 502 can be positioned as close to the ends as possible. Furthermore, as... Figure 3 As shown, from a third-party perspective, the size of the second heat dissipation channel 50 can be larger than the size of the first heat dissipation channel 30, see [reference]. Figure 3The second heat dissipation channel 50 is positioned at the bottom side 53, which maximizes the contact area between the second heat dissipation channel 50 and the battery assembly 10, thereby increasing the heat dissipation effect.

[0035] In this embodiment, a second heat dissipation channel 50 is provided between the battery module 10 and the first heat dissipation channel 30. This isolates the heat dissipation channels between the power module 21 and the battery module 10, making it difficult for heat from the power module 21 to be transferred to the battery module 10. Furthermore, the continuously blowing cold air into the second heat dissipation channel 50 continuously cools the battery module 10, thereby improving its safety and lifespan. Additionally, in the event of thermal runaway in the battery module 13 within the battery module 10, the heat will be carried away by the cold air in the second heat dissipation channel 50, preventing any impact on the power module 21. Ultimately, this ensures that the heat from the power module 21 and the battery module 13 does not affect each other, maintaining a favorable temperature environment and protecting both the power module 21 and the battery module 13. It also avoids circuit corrosion problems caused by the power module 21 and the battery module 13 sharing a common heat dissipation channel.

[0036] In one embodiment, such as Figure 1 As shown, the second heat dissipation channel 50 includes an air inlet sidewall 51 facing the first heat dissipation channel 30. Both the air inlet 501 and the air outlet 502 are located at the air inlet sidewall 51. An extended air duct baffle 52 is provided at the air inlet sidewall 51 (see...). Figure 2 The air duct baffle 52 is located downstream of the air duct inlet 501 (i.e., on the side of the air duct inlet 501 away from the air duct outlet 502), and the distance between it and the air duct inlet 501 is less than a preset value. The height of the air duct baffle 52 can be slightly greater than the size of the air duct inlet 501 in the third direction, so as to achieve a better wind-blocking effect. The air duct baffle 52 can be set close to the air duct inlet 501, for example, the distance between the two can be set to a value between 1cm and 20cm.

[0037] In this embodiment, by setting a baffle plate 52 at the air inlet 501 of the air duct, part of the airflow entering from the first air inlet of the first heat dissipation channel 30 can be gathered at the air inlet 501 of the air duct, thus ensuring the air intake volume in the second heat dissipation channel 50.

[0038] In a further embodiment, such as Figure 1As shown, the energy storage device 100 also includes an air inlet housing 60 and an air outlet housing 70, respectively disposed at both ends of the first heat dissipation channel 30 in the first direction. The air inlet housing 60, together with the side of the battery assembly 10, the first heat dissipation channel 30, and the power module 21, forms a side air inlet 601. The side air inlet 601 has main air inlets 602 on both sides along the second direction and is connected to the first heat dissipation channel. The air outlet housing 70, together with the side of the battery assembly 10, the first heat dissipation channel 30, and the power module 21, forms a side air outlet 701. The side air outlet 701 has a main air outlet 702. In this embodiment, in the first direction, the fan 40, the main air outlet 702, and the first air outlet are aligned.

[0039] like Figure 4 As shown, outside air enters the side air intake duct 601 through the two main air intakes 602, and then flows into the first heat dissipation channel 30. Therefore, when the air flows in the side air intake duct 601, it can also carry away some of the heat from the battery assembly 10 and the power assembly 20, thus enhancing the heat dissipation effect.

[0040] Furthermore, the air inlet housing 60 and the air outlet housing 70 can also conceal the internal structure and enhance the aesthetics of the appearance.

[0041] Furthermore, the alignment of the main air outlet 702 and the first air outlet allows the airflow within the first heat dissipation channel 30 to flow directly to the outside, quickly carrying away heat.

[0042] Figure 5 This is a schematic diagram of the installation structure of the battery assembly 10 of an energy storage device 100 according to an embodiment of the present invention. Figure 5As shown, in one embodiment, the battery assembly 10 includes a battery housing 11, a fixing component disposed within the battery housing 11, and a battery module 13. The fixing component includes a wedge-shaped bracket assembly fixedly disposed within the battery housing 11. The wedge-shaped bracket assembly forms a slot 121 for supporting the battery module 13. The fixing component also includes a plurality of fasteners 14 for fixing the battery module 13 to the wedge-shaped bracket assembly. In this embodiment, the wedge-shaped bracket assembly includes two wedge-shaped brackets, each wedge-shaped bracket being provided with a slot 121. The two sides of the bottom of the battery module 13 are placed in the two slots 121. The slots 121 of the two wedge-shaped brackets together define the degrees of freedom in the length and width directions of the battery module 13. Then, the plurality of fasteners 14 (e.g., screws) are passed sequentially through the through holes 110 on the side of the battery module 13 and the mounting holes 120 on the wedge-shaped brackets and tightened with fastening accessories (e.g., nuts) to fix the battery module 13 to the wedge-shaped bracket assembly. The wedge-shaped bracket itself can be fixed to the battery housing 11 by welding, screwing, or riveting. When the bottom side of the battery module 13 is a plane with different concave and convex surfaces, the slot 121 is also set to a matching depth accordingly.

[0043] Furthermore, the sidewall of the slot 121 on the wedge-shaped card holder can be set in an inclined state, so that the slot 121 gradually expands from the bottom to the top, so as to facilitate the insertion of the battery module 13 and play a guiding and convenient installation role.

[0044] In this embodiment, the battery module 13 is first positioned at the bottom by the wedge-shaped bracket assembly. The battery module 13 can be positioned by simply placing it into the slot 121 of the wedge-shaped bracket assembly, and then it is fixed by the fastener 14. Therefore, the assembly is simple and the battery module 13 can be installed quickly.

[0045] Figure 6 This is a schematic diagram of the battery module 13 of an energy storage device 100 according to an embodiment of the present invention. Figure 6 As shown, in one embodiment, the battery module 13 includes multiple sub-modules 131, multiple insulating sheets 132, and two module positioning members 133. Each sub-module 131 includes multiple individually arranged battery cells 101, and an insulating sheet 132 is disposed between adjacent sub-modules 131. The two module positioning members 133 are disposed on opposite sides of the multiple sub-modules 131 and are connected to each sub-module 131. That is, the module positioning members 133 extend along the arrangement direction of each sub-module 131, and can be connected to the side of each sub-module 131 by fasteners. The insulating sheets 132 are used to isolate heat conduction after thermal runaway of each sub-module 131.

[0046] Figure 7This is an exploded structural diagram of a sub-module 131 of an energy storage device 100 according to an embodiment of the present invention. Figure 7 As shown, each individual cell 101 in each sub-module 131 is further provided with a first insulating sheet 102. The outermost two individual cells 101 are each provided with a first insulating sheet 102 and a fixing side plate 103. Second insulating sheets 104 are provided on both sides of all individual cells 101. One or more binding steel straps 105 can be provided along the height of the sub-module 131 to fix the aforementioned components, forming an independent sub-module 131. Here, the first insulating sheet 102 can be an aerogel insulating sheet. The mounting hole 120 mentioned above can be located at the fixing side plate 103.

[0047] The energy storage device 100 of this embodiment includes multiple sub-modules 131, each sub-module 131 including multiple individual battery cells 101, which is conducive to mass production and flexible in assembly method, realizing the combination of different numbers of battery cells or sub-modules 131.

[0048] Figure 8 The diagram shows a flow field simulation of an energy storage device 100 according to an embodiment of the present invention. Figure 9 This is a temperature simulation diagram of an energy storage device 100 according to an embodiment of the present invention. Figure 8 and Figure 9 The orientation of the medium energy storage device 100 and Figure 4 Consistent with the above, simulations of wind speed and temperature were performed on the energy storage device 100 according to the embodiments of this application, such as... Figure 8 As shown, the energy storage device 100 in this embodiment has a smooth overall airflow path. The flow fields of both the first heat dissipation channel 30 and the second heat dissipation channel 50 are smooth and uniform. The wind speed in the first heat dissipation channel 30 reaches 3.9 m / s, while the wind speed in the second heat dissipation channel 50 can also reach nearly 1.2 m / s. This ensures that the heat of high-loss devices is dissipated while maintaining the isolation effect of the second heat dissipation channel 50, preventing the first heat dissipation channel 30 from interfering with the heat of the battery assembly 10.

[0049] like Figure 9 As shown, the internal temperature of the energy storage device 100 in this embodiment is approximately 54°C, with a maximum of 55.68°C and a minimum of 51.84°C. Under the action of the second heat dissipation channel 50, the gas temperature inside the battery casing 11 is approximately 44°C, with a maximum of 46.07°C and a minimum of 44.03°C. The temperature difference between the power module 21 and the battery assembly 10 is 9°C, with the maximum temperature difference reaching 11°C. This indicates that the energy storage device 100 can effectively isolate the heat exchange between the battery module 13 and the power module 21, ensuring that the temperature inside the battery assembly 10 is not affected by high-temperature interference, thereby ensuring the stability and safety of the battery module 13.

[0050] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A heat dissipation structure, characterized in that, include: The first heat dissipation channel (30) has a first air cavity and a first air inlet and a first air outlet (301) that are both connected to the first air cavity. The first air inlet and the first air outlet (301) are located at both ends of the first air cavity in a first direction. The first air cavity is used to accommodate a portion of the first heat dissipation component. A fan (40) is used to introduce airflow from the first air inlet into the first heat dissipation channel (30); The second heat dissipation channel (50) is disposed between the first heat dissipation channel (30) and the second heat dissipation component in the second direction. The second direction is perpendicular to the first direction. The second heat dissipation channel (50) has a second air cavity, and an air duct inlet (501) and an air duct outlet (502) that are both connected to the second air cavity. The air duct inlet (501) and the air duct outlet (502) are arranged at intervals along the first direction and are both connected to the first air cavity.

2. The heat dissipation structure according to claim 1, characterized in that, The second heat dissipation channel (50) includes an air inlet sidewall (51) facing the first heat dissipation channel (30), and the air inlet (501) and the air outlet (502) are disposed at both ends of the air inlet sidewall (51) in the first direction.

3. The heat dissipation structure according to claim 2, characterized in that, An extended air duct baffle (52) is provided at the air inlet sidewall (51). The air duct baffle (52) is located downstream of the air duct inlet (501), and the distance between it and the air duct inlet (501) is less than a preset value.

4. The heat dissipation structure according to claim 1, characterized in that, Both the air inlet (501) and the air outlet (502) of the air duct include multiple through holes.

5. The heat dissipation structure according to claim 1, characterized in that, The fan (40) is installed at the first air inlet, and a plurality of the fans (40) are arranged along the second direction.

6. The heat dissipation structure according to any one of claims 1-5, characterized in that, It also includes an air inlet housing (60), which is disposed at one end of the first heat dissipation channel (30) where the first air inlet is provided. The air inlet housing, together with the side of the first heat dissipation component, the first heat dissipation channel (30) and the second heat dissipation component, forms a side air inlet channel (601). The side air inlet channel (601) is provided with a main air inlet (602) at both ends along the second direction. The side air inlet channel (601) is connected to the first heat dissipation channel (30).

7. The heat dissipation structure according to claim 5, characterized in that, It also includes an air outlet housing (70), which is disposed at one end of the first heat dissipation channel (30) where the first air outlet (301) is located. The air outlet housing (70), together with the side of the first heat dissipation component, the first heat dissipation channel (30) and the second heat dissipation component, forms a side air outlet duct (701). The side air outlet duct (701) is provided with a main air outlet (702).

8. An energy storage device (100), characterized in that, It includes a first heat-dissipating component and a second heat-dissipating component, as well as the heat dissipation structure according to any one of claims 1-7; The first heat-dissipating component is a battery assembly (10), and the second heat-dissipating component is a power assembly (20). The battery assembly (10) and the power assembly (20) are arranged side by side along a first direction. The power assembly (20) includes a power module (21) and a heat sink (22) arranged sequentially along a third direction. The heat sink (22) is located in the first air cavity of the first heat dissipation channel (30). The third direction, the second direction and the first direction are perpendicular to each other.

9. The energy storage device (100) according to claim 8, characterized in that, The battery assembly (10) includes a battery housing (11) and a fixing component and a battery module (13) disposed within the battery housing (11). The fixing component includes a wedge-shaped bracket assembly fixedly disposed within the battery housing. The wedge-shaped bracket assembly forms a slot (121) for supporting the battery module (13). The fixing component also includes a plurality of fasteners (14) for fixing the battery module (13) to the wedge-shaped bracket assembly.

10. The energy storage device (100) according to claim 9, characterized in that, The battery module (13) includes: Multiple sub-modules (131) include multiple individual battery cells (101) arranged in sequence. Multiple insulating sheets (132) are disposed between adjacent sub-modules (131); Two module positioning elements (133) are disposed on opposite sides of the plurality of sub-modules (131) and are connected to each of the sub-modules (131).

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