Heat dissipation assembly and energy storage device

Abstract

The application relates to the technical field of batteries, and specifically discloses a heat dissipation assembly and an energy storage device. The heat dissipation assembly is applied to the energy storage device. The energy storage device comprises a battery cell group and a power assembly. The heat dissipation assembly comprises a shell, a plurality of busbars and a radiator. The shell is configured to accommodate the battery cell group. The shell has an air inlet and an air outlet arranged oppositely and a heat dissipation channel communicating the air inlet and the air outlet, and the heat dissipation channel is configured to accommodate the power assembly. The plurality of busbars are connected with the battery cell group and configured to collect the current of the battery cell group. The radiator is in heat conduction connection with at least part of the plurality of busbars, and at least part of the radiator extends into the heat dissipation channel.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to a heat dissipation component and an energy storage device. Background Technology

[0002] Battery cells in energy storage devices typically lack additional heat dissipation measures. They primarily rely on the cell's own thermal capacity to absorb heat generated during charging and discharging, as well as natural heat dissipation through the device's casing. The heat dissipation capacity of cells using these methods is very limited, especially in continuous high-power charging and discharging scenarios. The heat dissipation from the cell is less than the heat generated, causing the cell temperature to rise continuously until it reaches its upper temperature limit, triggering a shutdown protection mechanism and severely impacting the user experience. Utility Model Content

[0003] In view of this, this application provides a heat dissipation component and an energy storage device to improve the heat dissipation capability of the battery cell.

[0004] One embodiment of this application provides a heat dissipation assembly for use in an energy storage device, which includes a battery cell assembly and a power module. The heat dissipation assembly includes a housing, multiple busbars, and a heat sink. The housing is configured to house the battery cell assembly. The housing has an air inlet and an air outlet disposed opposite each other, and a heat dissipation channel connecting the air inlet and the air outlet, the heat dissipation channel being configured to house the power module. The multiple busbars are all connected to the battery cell assembly and configured to collect the current from the battery cell assembly. The heat sink is thermally connected to at least a portion of one of the multiple busbars, and at least a portion of the heat sink extends into the heat dissipation channel.

[0005] In the aforementioned heat dissipation assembly, the air inlet and outlet are connected to a heat dissipation channel for housing the power components. This allows airflow entering from the air inlet to reach the power components for heat dissipation, and the hot airflow that has absorbed heat from the power components can be discharged from the outlet of the housing, thereby improving the heat dissipation effect. By installing a heat sink on the busbar connected to the battery cell assembly, the heat sink can dissipate the heat conducted from the battery cell assembly to the busbar, thus facilitating timely heat dissipation of the battery cell assembly and improving the overall heat dissipation capacity of the energy storage device. Since at least a portion of the heat sink extends into the heat dissipation channel, it can effectively utilize airflow to dissipate heat from the heat sink, rapidly dissipating the heat, thereby improving the heat dissipation effect. Furthermore, utilizing the heat dissipation channel of the power components for heat dissipation allows the power components and battery cell assembly to share a single heat dissipation channel, achieving channel reuse and avoiding the need for a separate heat dissipation channel for battery cell cooling, effectively reducing the space occupied by the internal heat dissipation channel of the device.

[0006] In some embodiments of this application, multiple buses include a positive main bus and a negative main bus, and the heat sink is thermally connected to the positive main bus and / or the negative main bus.

[0007] By thermally connecting the heat sink to the positive and / or negative busbars, the heat sink can dissipate heat from all the cells in the battery pack. Specifically, all the cells in the battery pack are connected to both the positive and negative busbars. Therefore, heat from each cell can be conducted to both the positive and negative busbars. Thus, thermally connecting the heat sink to the positive and / or negative busbars achieves heat dissipation for all the cells in the battery pack. Furthermore, since the positive and negative busbars are the final output terminals after the current from the battery pack is collected, they have the highest current flow and therefore generate the most heat. Connecting the heat sink to the positive and / or negative busbars facilitates timely heat dissipation from the areas with the highest heat generation, reducing the risk of localized overheating of the busbars.

[0008] In some embodiments of this application, the connection points of multiple busbars to the heat sink are configured to extend from one side of the battery pack.

[0009] The busbar conducts heat from the battery pack to the connection point between the busbar and the heat sink, and then conducts it to the heat sink for heat dissipation. Since the connection point extends from one side of the battery pack, that is, the connection point is located on the side of the battery pack, it helps to avoid the situation where heat is concentrated at the battery pack and the local temperature of the battery pack is too high.

[0010] In some embodiments of this application, the heat sink is positioned close to the air inlet so that the airflow entering from the air inlet passes sequentially through the heat sink and the power components before being discharged from the air outlet.

[0011] The air entering from the air inlet is at a lower temperature. Placing the radiator close to the air inlet helps to dissipate heat from the radiator through the cooler air, thus improving the heat dissipation effect.

[0012] In some embodiments of this application, the heat dissipation assembly further includes a fan located in the heat dissipation channel and on the side of the heat sink away from the air inlet, and the fan is configured to generate airflow through the heat dissipation channel.

[0013] The heat dissipation component further includes a fan. Placing both the heat sink and the fan in the heat dissipation channel between the air inlet and outlet helps to better improve the overall heat dissipation capacity of the heat dissipation component. The fan, located between the heat sink and the power component, is used to specifically enhance the heat dissipation of the power component, which helps to improve the heat dissipation effect of the power component and also prevents the heat sink from blocking the airflow through the heat dissipation component.

[0014] In some embodiments of this application, the heat dissipation assembly further includes a fan located in the heat dissipation channel and between the heat sink and the air inlet, and the fan is configured to generate airflow through the heat dissipation channel.

[0015] The heat dissipation component further includes a fan. Placing both the heatsink and fan within the heat dissipation channel between the air inlet and outlet improves the overall heat dissipation capacity of the component. With the fan positioned between the heatsink and the air inlet, the airflow generated by the fan can simultaneously dissipate heat from both the heatsink and the power components, eliminating the need for additional fans. This reduces the complexity and noise of the heat dissipation component. Furthermore, the fan's installation space is less constrained, allowing for improvements in heat dissipation by increasing its size.

[0016] In some embodiments of this application, the heat dissipation assembly further includes an insulating thermally conductive pad located at the connection point between the heat sink and the multiple busbars, and connecting the connection point and the heat sink.

[0017] By connecting the busbar and the radiator with an insulating thermal pad, heat can be quickly transferred from the busbar to the radiator for rapid heat dissipation. While dissipating heat, electrical insulation is ensured, which helps to improve heat dissipation efficiency and reduce the risk of leakage and short circuit.

[0018] In some embodiments of this application, the heat dissipation assembly further includes a thermoelectric cooler located between the insulating thermal pad and the heat sink. The thermoelectric cooler includes a cold side and a hot side disposed opposite to each other, with the cold side contacting the insulating thermal pad and the hot side connected to the heat sink.

[0019] Semiconductor cooling chips can effectively and quickly cool the insulating thermal pad, thereby effectively and quickly cooling the busbar and improving the overall heat dissipation effect of the heat dissipation component. Furthermore, semiconductor cooling chips can generate temperatures below ambient temperature, enabling the energy storage device to maintain a certain charging and discharging capability even when the ambient temperature is close to the upper limit of the cell temperature specification. This broadens the operating temperature range of the product and expands the application scope of energy storage devices.

[0020] In some embodiments of this application, the heat dissipation assembly further includes thermal grease, which is located between the thermoelectric cooler and the heat sink and connects the thermoelectric cooler and the heat sink.

[0021] Thermal grease can quickly transfer heat from the hot side of the semiconductor cooling chip to the heat sink for diffusion, thereby accelerating the heat dissipation rate and improving the heat dissipation effect.

[0022] One embodiment of this application also provides an energy storage device, including a battery cell assembly and a power component. The energy storage device further includes a heat dissipation assembly as described above, with the battery cell assembly located inside the housing and the power component located in a heat dissipation channel.

[0023] In the aforementioned energy storage device, the air inlet and outlet are connected to a heat dissipation channel for housing the power components. This allows the airflow entering from the air inlet to reach the power components for heat dissipation, and the hot airflow that has absorbed heat from the power components can be discharged from the outlet of the housing, thereby improving the heat dissipation effect. By installing a heat sink on the busbar connected to the battery cell assembly, the heat conducted from the battery cell assembly to the busbar can be dissipated, thus facilitating timely heat dissipation of the battery cell assembly and improving the overall heat dissipation capacity of the energy storage device. Since at least part of the heat sink extends into the heat dissipation channel, it can effectively utilize airflow to dissipate heat from the heat sink, rapidly dissipating the heat, thereby improving the overall heat dissipation effect of the energy storage device. Furthermore, utilizing the heat dissipation channel of the power components to dissipate heat from the heat sink allows the power components and battery cell assembly to share a single heat dissipation channel, achieving heat dissipation channel reuse and avoiding the need for a separate heat dissipation channel for battery cell cooling, effectively reducing the space occupied by the internal heat dissipation channel of the device. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation on the scope.

[0025] Figure 1 This is a three-dimensional structural diagram of an energy storage device provided in an embodiment of this application; Figure 2 This is an exploded view of an energy storage device provided in one embodiment of this application; Figure 3 This is a partial exploded view of an energy storage device provided in an embodiment of this application. Figure 4 A partial three-dimensional structural schematic diagram of an energy storage device provided in an embodiment of this application; Figure 5 A partial three-dimensional structural schematic diagram of an energy storage device provided in an embodiment of this application; Figure 6 for Figure 5 Another structural diagram; Figure 7 This is a cross-sectional structural schematic diagram of an energy storage device provided in an embodiment of this application; Figure 8 A cross-sectional structural schematic diagram of an energy storage device provided in another embodiment of this application.

[0026] Explanation of main component symbols Energy storage device-200, heat dissipation component-10, battery cell assembly-30, power component-50, housing-11, busbar-12, heat sink-13, air inlet-111, air outlet-113, heat dissipation channel-115, battery cell-30a, positive electrode busbar-121, negative electrode busbar-123, positive electrode main busbar-125, negative electrode main busbar-127, connection point-12a, fan-14, insulating thermal pad-15, semiconductor cooling chip-16, cold side-161, hot side-163, thermal grease-17, circuit board-51, electronic components-53. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0029] Battery cells in energy storage devices typically lack additional heat dissipation measures. They primarily rely on the cell's own thermal capacity to absorb heat generated during charging and discharging, as well as natural heat dissipation through the device's casing. The heat dissipation capacity of cells using these methods is very limited, especially in continuous high-power charging and discharging scenarios. The heat dissipation from the cell is less than the heat generated, causing the cell temperature to rise continuously until it reaches its upper temperature limit, triggering a shutdown protection mechanism and severely impacting the user experience.

[0030] One embodiment of this application provides a heat dissipation assembly for use in an energy storage device, which includes a battery cell assembly and a power module. The heat dissipation assembly includes a housing, multiple busbars, and a heat sink. The housing is configured to house the battery cell assembly. The housing has an air inlet and an air outlet disposed opposite each other, and a heat dissipation channel connecting the air inlet and the air outlet, the heat dissipation channel being configured to house the power module. The multiple busbars are all connected to the battery cell assembly and configured to collect the current from the battery cell assembly. The heat sink is thermally connected to at least a portion of one of the multiple busbars, and at least a portion of the heat sink extends into the heat dissipation channel.

[0031] In the aforementioned heat dissipation assembly, the air inlet and outlet are connected to a heat dissipation channel for housing the power components. This allows airflow entering from the air inlet to reach the power components for heat dissipation, and the hot airflow that has absorbed heat from the power components can be discharged from the outlet of the housing, thereby improving the heat dissipation effect. By installing a heat sink on the busbar connected to the battery cell assembly, the heat sink can dissipate the heat conducted from the battery cell assembly to the busbar, thus facilitating timely heat dissipation of the battery cell assembly and improving the overall heat dissipation capacity of the energy storage device. Since at least a portion of the heat sink extends into the heat dissipation channel, it can effectively utilize airflow to dissipate heat from the heat sink, rapidly dissipating the heat, thereby improving the heat dissipation effect. Furthermore, utilizing the heat dissipation channel of the power components to dissipate heat from the heat sink allows the power components and battery cell assembly to share a single heat dissipation channel, achieving channel reuse and avoiding the need for a separate heat dissipation channel for battery cell assembly cooling, effectively reducing the space occupied by the internal heat dissipation channel of the device.

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

[0033] Please see Figures 1 to 8 One embodiment of this application provides an energy storage device 200. The energy storage device 200 includes a heat dissipation assembly 10, a battery cell assembly 30, and a power assembly 50. The battery cell assembly 30 and the power assembly 50 are housed within the heat dissipation assembly 10. As an exemplary example, the energy storage device 200 can be a portable power source for outdoor applications or a home energy storage system for home use. The energy storage device 200 can directly discharge to electrical devices using the battery cell assembly 30, and is particularly suitable for charging or supplying power to various household electrical appliances, such as household lighting, heating equipment, electric stoves, washing machines, refrigerators, air conditioners, dishwashers, and range hoods, or charging devices such as mobile phones, tablets, and computers. Additionally, the energy storage device 200 can be quickly charged using an external power source.

[0034] The heat dissipation assembly 10 includes a housing 11, multiple busbars 12, and a heat sink 13. The battery cell assembly 30 is housed within the housing 11.

[0035] The housing 11 has an air inlet 111 and an air outlet 113 disposed opposite to each other, and a heat dissipation channel 115 connecting the air inlet 111 and the air outlet 113. The power component 50 is housed in the heat dissipation channel 115.

[0036] The housing 11 can be rectangular or cylindrical, or other regular or irregular shapes. In this embodiment, a rectangular shape is used as an example. The air inlet 111 and air outlet 113 are respectively located on two opposite sidewalls of the rectangular housing 11. The housing 11 includes a chamber (not shown) for housing the battery cell assembly 30. In this embodiment, the heat dissipation channel 115 can be completely connected to the chamber housing the battery cell assembly 30 to form an inner cavity. In some embodiments, the heat dissipation channel 115 can also be separated from the chamber housing the battery cell assembly 30.

[0037] Multiple busbars 12 are connected to the cell group 30 to collect the current of each cell 30a in the cell group 30.

[0038] The heat sink 13 is thermally connected to at least a portion of one of the multiple busbars 12. In some embodiments, the heat sink 13 may be thermally connected to only one of the busbars 12, or to a portion of that busbar 12. In other embodiments, the heat sink 13 may be thermally connected to all or all of the multiple busbars 12, or to a portion of the multiple or all of the busbars 12.

[0039] At least a portion of the heat sink 13 extends into the heat dissipation channel 115. In some embodiments, the heat sink 13 is only partially located within the heat dissipation channel 115. In other embodiments, the heat sink 13 may be entirely located within the heat dissipation channel 115.

[0040] In the aforementioned heat dissipation assembly 10, the air inlet 111 and the air outlet 113 are connected to the heat dissipation channel 115 for housing the power component 50, allowing the airflow entering from the air inlet 111 to reach the power component 50 for heat dissipation, and the hot airflow that has absorbed the heat from the power component 50 can be discharged from the housing 11 through the air outlet 113, thereby improving the heat dissipation effect. By installing a heat sink 13 on the busbar connected to the battery cell assembly 30, the heat conducted from the battery cell assembly 30 to the busbar 12 can be dissipated through the heat sink 13, thereby facilitating timely heat dissipation of the battery cell assembly 30 and improving the overall heat dissipation capacity of the energy storage device 200. At least a portion of the heat sink 13 extends into the heat dissipation channel 115, which can effectively utilize airflow to dissipate heat from the heat sink 13 and quickly dissipate the heat from the heat sink 13, thereby improving the heat dissipation effect. Furthermore, by utilizing the heat dissipation channel 115 of the power component 50 to dissipate heat from the heat sink 13, the power component 50 and the battery cell assembly 30 can share the same heat dissipation channel 115 for heat dissipation, thereby achieving the reuse of the heat dissipation channel 115 and avoiding the need to open a separate heat dissipation channel for the battery cell assembly 30, effectively reducing the space occupied by the heat dissipation channel 115 inside the equipment.

[0041] The multiple buses 12 include multiple positive sub-buses 121, multiple negative sub-buses 123, a positive main bus 125, and a negative main bus 127. Each positive sub-bus 121 is electrically connected to the positive terminals of at least two cells 30a, and each negative sub-bus 123 is electrically connected to the negative terminals of at least two cells 30a. The positive main bus 125 is connected to each positive sub-bus 121 as a positive output terminal to collect and output the current from each positive sub-bus 121. The negative main bus 127 is connected to each negative sub-bus 123 as a negative output terminal to collect and output the current from each negative sub-bus 123.

[0042] In some embodiments, bus 12 may be, but is not limited to, an aluminum bus. Aluminum bus has good thermal conductivity, which helps to ensure heat dissipation.

[0043] In some embodiments, the heat sink 13 may be thermally connected to the positive bus 125 and / or the negative bus 127.

[0044] The heat sink 13 is thermally connected to the positive busbar 125 and / or the negative busbar 127, enabling it to dissipate heat from all the battery cells 30a in the battery cell assembly 30. Specifically, all the battery cells in the battery cell assembly 30 are connected to the positive busbar 125 and also to the negative busbar 127. Therefore, the heat from each battery cell 30a can be conducted to the positive busbar 125 and the negative busbar 127. Thus, the thermal connection between the heat sink 13 and the positive busbar 125 and / or the negative busbar 127 enables heat dissipation from all the battery cells 30a in the battery cell assembly 30. In addition, since the positive busbar 125 and the negative busbar 127 are the total output terminals after the current of the battery pack 30 is collected, the current is the largest. Therefore, the heat generated by the positive busbar 125 and the negative busbar 127 is also the largest. Therefore, it is beneficial to connect the heat sink 13 to the positive busbar 125 and / or the negative busbar 127 in a thermally conductive way to dissipate heat from the area with the largest heat generation in a timely manner, which helps to reduce the risk of local overheating of the busbar 12.

[0045] In some embodiments, the connection 12a of the plurality of busbars 12 to the heat sink 13 may extend from one side of the cell assembly 30. As an example, each positive sub-bus 121 and each negative sub-bus 123 is provided corresponding to the cell assembly 30, a positive main bus 125 may extend from each positive sub-bus 121 from one side of the cell assembly 30, and / or a negative main bus 127 may extend from each negative sub-bus 123 from one side of the cell assembly 30, and the heat sink 13 is connected to the area where the positive main bus 125 and / or the negative main bus 127 extend from one side of the cell assembly 30.

[0046] Busbar 12 conducts heat from battery cell assembly 30 to connection point 12a with heat sink 13 in busbar 12, and then conducts it to heat sink 13 for heat dissipation through connection point 12a. Since connection point 12a extends from one side of battery cell assembly 30, that is, connection point 12a is located on the side of battery cell assembly 30, it helps to avoid heat concentration at battery cell assembly 30, which would cause the local temperature of battery cell assembly 30 to be too high.

[0047] In some embodiments, the radiator 13 is positioned close to the air inlet 111, between the air inlet 111 and the power component 50, so that the airflow entering from the air inlet 111 passes sequentially through the radiator 13 and the power component 50 before being discharged from the air outlet 113. It is understood that the air temperature is relatively low when it first enters from the air inlet 111; therefore, positioning the radiator 13 close to the air inlet 111 facilitates the dissipation of heat from the radiator 13 by using cooler air, rapidly dissipating the heat and thus improving the heat dissipation effect.

[0048] In some embodiments, the heat dissipation assembly 10 may further include a fan 14, which is located in the heat dissipation channel 115, thereby providing sufficient airflow to the fan 14. By simultaneously placing the heat sink 13 and the fan 14 in the heat dissipation channel 115 between the air inlet 111 and the air outlet 113, it is beneficial to better improve the overall heat dissipation capacity of the heat dissipation assembly 10.

[0049] The fan 14 can be located on the side of the heatsink 13 away from the air inlet 111 or between the heatsink 13 and the air inlet 111. When the fan 14 is located on the side of the heatsink 13 away from the air inlet 111, the airflow generated by the fan 14 flows through the power component 50. In this case, the heat dissipation of the power component 50 can be specifically enhanced, which is beneficial to improving the performance of the power component 50 and preventing the heatsink 13 from blocking the airflow through the power component 50. When the fan 14 is located between the heatsink 13 and the air inlet 111, the airflow generated by the fan 14 flows through both the heatsink 13 and the power component 50. In this case, there is no need to introduce other fans, which helps to reduce the complexity and noise of the heat dissipation component 10. In addition, the installation space of the fan 14 is not easily restricted, and the heat dissipation effect can be improved by increasing the size of the fan 14.

[0050] In some embodiments, the heat dissipation assembly 10 may further include an insulating thermally conductive pad 15, which is located between the connection 12a of the plurality of busbars 12 and the heat sink 13, and connects the connection 12a and the heat sink 13.

[0051] By connecting the busbar 12 and the radiator 13 with the insulating thermal pad 15, heat can be quickly transferred from the busbar 12 to the radiator 13 for rapid heat dissipation, while ensuring electrical insulation during heat dissipation. This helps to improve heat dissipation efficiency while reducing the risk of leakage and short circuit.

[0052] In some embodiments, the heat dissipation assembly 10 may further include a thermoelectric cooler 16, which is located between the insulating thermal pad 15 and the heat sink 13. The thermoelectric cooler 16 includes a cold surface 161 and a hot surface 163 disposed opposite to each other. The cold surface 161 contacts the insulating thermal pad 15, and the hot surface 163 is connected to the heat sink 13.

[0053] The thermoelectric cooler 16 can effectively and quickly cool the insulating thermal pad 15, thereby effectively and quickly cooling the busbar 12, thus improving the overall heat dissipation effect of the heat dissipation assembly 10. Furthermore, the thermoelectric cooler 16 can generate temperatures below ambient temperature, ensuring that the energy storage device 200 still has a certain charging and discharging capability even when the ambient temperature is close to the upper limit specified for the cell 30a, thus widening the product's operating temperature range and expanding the application scope of the energy storage device.

[0054] The semiconductor cooling chip 16 can be, but is not limited to, a thermoelectric cooling chip. Thermoelectric cooling chips have higher reliability, which helps to ensure the heat dissipation effect they provide.

[0055] In some embodiments, the heat dissipation assembly 10 may further include thermal grease 17, which is located between the thermoelectric cooler 16 and the heat sink 13 and connects the thermoelectric cooler 16 and the heat sink 13.

[0056] The thermal grease 17 can quickly transfer the heat from the hot surface 163 of the semiconductor cooling chip 16 to the heat sink 13 for diffusion, thereby accelerating the heat dissipation rate and improving the heat dissipation effect.

[0057] In some embodiments, the power component 50 may be a power conversion module, which is electrically connected to the battery cell assembly 30. The power conversion module is used to control the AC / DC conversion of the output current of the battery cell assembly 30. The energy storage device 200 equipped with the power conversion module may be a small portable power supply, a residential energy storage power supply, an industrial or commercial energy storage power supply, or a containerized energy storage power supply, etc.

[0058] In some embodiments, the power component 50 may include a circuit board 51 and electronic components 53. The circuit board 51 may be electrically connected to the battery cell assembly 30, and the electronic components 53 are disposed on the circuit board 51 and electrically connected to the circuit board 51. The electronic components 53 may be disposed corresponding to the air outlet 113, thereby facilitating the timely discharge of heat from the housing 11 and thus facilitating the heat dissipation of the entire energy storage device 200.

[0059] For example, the fan 14 can be disposed on the circuit board 51 and electrically connected to the circuit board 51, making full use of the circuit board 51 to support and power the fan 14, without the need for additional support elements to support the fan 14, and without the need for additional power lines to electrically connect the fan 14.

[0060] In some embodiments, the bus 12, the insulating thermal pad 15, the thermal grease 17, and the heat sink 13 can be stacked in sequence, i.e., the semiconductor cooling chip is omitted.

[0061] In some embodiments, the bus 12, the thermoelectric cooler 16, the thermal grease 17, and the heat sink 13 can be stacked in sequence, i.e., the insulating thermal pad is omitted.

[0062] Furthermore, those skilled in the art should recognize that the above embodiments are merely illustrative of this application and are not intended to limit this application. Any appropriate changes and variations made to the above embodiments within the essential spirit and scope of this application fall within the scope of this application's disclosure.

Claims

1. A heat dissipation component, applied to an energy storage device, the energy storage device comprising a battery cell assembly and a power module, characterized in that, The heat dissipation component includes: A housing is configured to house the battery cell assembly, the housing having an air inlet and an air outlet disposed opposite to each other and a heat dissipation channel connecting the air inlet and the air outlet, the heat dissipation channel being configured to house the power component; Multiple busbars are connected to the battery cell assembly and configured to collect the current of the battery cell assembly; A heat sink is thermally connected to at least a portion of the plurality of busbars, and at least a portion of the heat sink extends into the heat dissipation channel.

2. The heat dissipation assembly according to claim 1, characterized in that, The plurality of busbars includes a positive main busbar and a negative main busbar, and the heat sink is thermally connected to the positive main busbar and / or the negative main busbar.

3. The heat dissipation assembly according to claim 2, characterized in that, The connection points of the multiple busbars to the heat sink are configured to extend from one side of the battery pack.

4. The heat dissipation assembly according to claim 1, characterized in that, The radiator is positioned close to the air inlet so that the airflow entering from the air inlet passes sequentially through the radiator and the power component before being discharged from the air outlet.

5. The heat dissipation assembly according to claim 1, characterized in that, The heat dissipation assembly also includes a fan located in the heat dissipation channel and on the side of the heat sink away from the air inlet, the fan being configured to generate airflow through the heat dissipation channel.

6. The heat dissipation assembly according to claim 1, characterized in that, The heat dissipation assembly also includes a fan located in the heat dissipation channel and between the heat sink and the air inlet, the fan being configured to generate airflow through the heat dissipation channel.

7. The heat dissipation assembly according to claim 1, characterized in that, The heat dissipation assembly also includes an insulating thermally conductive pad, which is located between the connection point of the plurality of busbars and the heat sink and connects the connection point and the heat sink.

8. The heat dissipation assembly according to claim 7, characterized in that, The heat dissipation assembly further includes a thermoelectric cooler, which is located between the insulating thermal pad and the heat sink. The thermoelectric cooler includes a cold side and a hot side arranged opposite to each other. The cold side contacts the insulating thermal pad, and the hot side is connected to the heat sink.

9. The heat dissipation assembly according to claim 8, characterized in that, The heat dissipation assembly also includes thermal grease, which is located between the thermoelectric cooler and the heat sink and connects the thermoelectric cooler and the heat sink.

10. An energy storage device, comprising a battery cell assembly and a power module, characterized in that, The energy storage device further includes a heat dissipation component as described in any one of claims 1 to 9, wherein the battery cell assembly is located within the housing, and the power component is located within the heat dissipation channel.

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