Radiator and energy storage device

Abstract

The utility model discloses a radiator and energy storage equipment, the radiator is provided with a heat exchange flow channel, the heat exchange flow channel is provided with a heat exchange medium inlet and a heat exchange medium outlet, the heat exchange flow channel comprises a plurality of inlet flow channels, a plurality of outlet flow channels and a plurality of first confluence channels, the inlet flow channels communicate with the heat exchange medium inlet, and the outlet flow channels communicate with the heat exchange medium outlet; the multiple flow outlet channels are communicated with the heat exchange medium outlet, one end of each first confluence channel is communicated with the at least two flow inlet channels, and the other end of each first confluence channel is communicated with the at least two flow outlet channels. According to the technical scheme, the uniform heat dissipation effect of the radiator on the part to be cooled can be effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage devices, and in particular to a radiator and an energy storage device using the radiator. Background Art

[0002] Energy storage devices can store energy for use in situations such as when power generation equipment fails. They can be widely used in multiple scenarios such as power generation, transmission and distribution, and power consumption. When energy storage devices are working, energy storage components will generate a certain amount of heat. If the heat of the energy storage components is not discharged in time, it will affect the service life of the energy storage components and may even cause safety accidents.

[0003] Based on this, the energy storage device in the related technology is provided with a radiator to utilize the radiator for the energy storage element. However, the current radiator has an uneven heat dissipation effect on the heat dissipation element. For example, the heat dissipation effect on different groups of battery elements of the energy storage element is inconsistent, which leads to a large temperature difference between different groups of battery elements, and then leads to a shorter service life of some groups of battery elements, affecting the overall service life of the energy storage element. Utility Model Content

[0004] The embodiments of the present application provide a heat sink and an energy storage device, which can effectively improve the uniform heat dissipation effect of the heat sink on the heat dissipation element.

[0005] In a first aspect, an embodiment of the present application provides a radiator having a heat exchange channel, wherein the heat exchange channel has a heat exchange medium inlet and a heat exchange medium outlet; the heat exchange channel includes a plurality of inlet channels, a plurality of outlet channels, and a plurality of first confluence channels, a plurality of the inlet channels are all connected to the heat exchange medium inlet, a plurality of the outlet channels are all connected to the heat exchange medium outlet, one end of each of the first confluence channels is connected to at least two of the inlet channels, and the other end of each of the first confluence channels is connected to at least two of the outlet channels.

[0006] In some embodiments, all inlet channels connected to the same first confluence channel have the same length, and all outlet channels connected to the same first confluence channel have the same length.

[0007] In some embodiments, the heat exchange medium inlet and the heat exchange medium outlet are located on the same side of the heat exchange channel, or on two opposite sides.

[0008] In some embodiments, the heat exchange medium inlet and the heat exchange medium outlet are both one; or, the heat exchange medium inlet includes two, the two heat exchange medium inlets are arranged at intervals, and the heat exchange medium outlet is located between the two heat exchange medium inlets; or,

[0009] The heat exchange medium outlets include two, the two heat exchange medium outlets are arranged at intervals, and the heat exchange medium inlet is located between the two heat exchange medium outlets.

[0010] In some embodiments, the inlet channel extends along a first direction, the first direction points from the side where the heat exchange medium inlet is located to the side where the first confluence channel is located, and the side where the heat exchange medium inlet is located and the side where the first confluence channel is located are opposite sides of the heat exchange channel;

[0011] Wherein, the plurality of inlet channels are arranged equidistantly along a direction perpendicular to the first direction; and / or, the plurality of outlet channels are arranged equidistantly along a direction perpendicular to the first direction; and / or,

[0012] A plurality of the first bus channels are arranged equidistantly along the first direction.

[0013] In some embodiments, the heat exchange flow channel further includes a circuitous flow channel, and the plurality of first converging flow channels are connected to the plurality of outlet flow channels through the circuitous flow channel.

[0014] In some embodiments, the circuitous flow channel includes a plurality of first return flow channels, the other end of each of the first confluence channels is connected to at least two of the first return flow channels, and each of the outlet flow channels is connected to at least one of the first return flow channels.

[0015] In some embodiments, the circuitous flow channel further includes one or more second confluence channels, and one end of each of the second confluence channels is connected to at least two of the first return flow channels, and the other end is connected to at least two of the outlet flow channels.

[0016] In some embodiments, the inlet channel has a first length, the first confluence channel has a second length, the first return channel has a third length, and the outlet channel has a fourth length; the sum of the first length, the second length, the third length, and the fourth length is the total length of the heat exchange medium flowing through the radiator;

[0017] Among them, for different first conduits, the first length, the third length and the fourth length are different, and the total flow length is the same, or the difference between the total flow lengths corresponding to different first conduits is less than 20% of the total flow length.

[0018] In some embodiments, the circuitous flow channel includes at least a plurality of second return channels and a plurality of third return channels, the other end of each of the first confluence channels is connected to at least two of the second return channels, and the two ends of each of the third return channels are respectively connected to at least one of the second return channels and at least one of the outlet channels. In some embodiments, the circuitous flow channel also includes one or more third confluence channels, one end of each of the third confluence channels is connected to at least two of the second return channels, and the other end is connected to at least two of the third return channels; and / or, the circuitous flow channel also includes one or more fourth confluence channels, one end of each of the fourth confluence channels is connected to at least two of the third return channels, and the other end is connected to at least two of the outlet channels.

[0019] In some embodiments, the inlet channel extends along a first direction, the first direction points from the side where the heat exchange medium inlet is located to the side where the first confluence channel is located, and the side where the heat exchange medium inlet is located and the side where the first confluence channel is located are opposite sides of the heat exchange channel; the detour channel includes a plurality of detour channels, and the plurality of detour channels are arranged in a direction perpendicular to the first direction and are connected in sequence;

[0020] Among them, among the multiple detour flow channels, along the flow direction of the heat exchange medium in the heat exchange flow channel, the second return flow channel of the detour flow channel closest to the heat exchange medium inlet is connected to the first confluence channel, and the third return flow channel of the detour flow channel closest to the heat exchange medium outlet is connected to the outlet flow channel, and in two adjacent detour flow channels, each of the third return flow channels of one of them is connected to at least one of the second return flow channels of the other one.

[0021] In some embodiments, the heat exchange flow channel further includes a branch flow channel, including an inlet section and a plurality of branch flow sections connected to the inlet section, the inlet section is connected to the heat exchange medium inlet, and the plurality of branch flow sections are respectively connected to the plurality of inlet channels; and / or,

[0022] The heat exchange flow channel also includes a collecting channel, including an outflow section and a plurality of converging sections connected to the outflow section, the outflow section is connected to the heat exchange medium outlet, and the plurality of converging sections are respectively connected to the plurality of outflow channels.

[0023] In some embodiments, the heat sink includes a heat dissipation base and a cover, wherein the cover is disposed on the heat dissipation base and cooperates with the heat dissipation base to enclose the heat exchange channel.

[0024] In some embodiments, the surface of the heat dissipation substrate is recessed in a direction away from the cover to form a flow channel, and the surface of the cover facing the heat dissipation substrate cooperates with the groove wall of the flow channel to enclose the heat exchange flow channel.

[0025] In some embodiments, the heat sink satisfies at least one of the following conditions:

[0026] Along the thickness direction of the heat dissipation substrate, the depth of the flow channel groove is H, and satisfies: 1mm≤H≤4.5mm; along the width direction of the heat dissipation substrate, the width of the notch of the flow channel groove is L1, and satisfies: 5mm≤L1≤25mm;

[0027] Along the width direction of the heat dissipation substrate, at least one of the distance between two adjacent inlet channels and the distance between two adjacent outlet channels is L2, and satisfies: 5mm≤L2≤20mm;

[0028] Along the thickness direction of the heat dissipation substrate, the thickness of the heat dissipation substrate is T, and satisfies: T ≥ 1.2 mm. In some embodiments, at least one of the heat dissipation substrate and the cover body is provided with a reinforcement portion spaced apart from the heat exchange flow channel, and the reinforcement portion includes at least one of a stamping groove and a reinforcement rib. In a second aspect, an embodiment of the present application provides an energy storage device, which includes a radiator, an energy storage element and a thermal management system as described above, the energy storage element being thermally connected to the radiator, and the thermal management system cooperating with the radiator to adjust the temperature of the energy storage element.

[0029] Based on the radiator of the embodiment of the present application, through the setting of the first confluence channel, the heat exchange medium flowing through different inlet channels can converge in the first confluence channel, and then the heat exchange medium can be mixed in the first confluence channel, and the heat will be transferred from the high-temperature heat exchange medium to the low-temperature heat exchange medium to achieve thermal balance as much as possible, and then the heat will be diverted to at least two outlet channels by the first confluence channel. In this way, the present embodiment can use the first confluence channel to mix the heat exchange medium to achieve thermal balance, and prevent the occurrence of excessive temperature difference between the heat exchange media flowing to different outlet channels, so that the heat dissipation effect of the radiator on different areas of the heat dissipation element is more uniform, which is beneficial to improving the overall temperature difference of the heat dissipation element to be cooled, or is beneficial to improving the temperature difference between different groups of battery elements of the heat dissipation element to be cooled, effectively extending the service life of the heat dissipation element to be cooled.

[0030] In addition, on the basis that the flow areas of the inlet channel, the outlet channel and the first confluence channel remain unchanged, the multiple settings of the inlet channel, the outlet channel and the first confluence channel can effectively increase the total contact area between the radiator and the heat dissipation element to be cooled, which helps to improve the heat dissipation effect of the radiator on the heat dissipation element. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0032] Figure 1 A schematic diagram of the structure of an energy storage device according to an embodiment of the present application;

[0033] Figure 2 This is a schematic structural diagram of an embodiment of a heat sink according to an embodiment of the present application;

[0034] Figure 3 This is a schematic diagram of the structure of a heat exchange channel according to an embodiment of the present application;

[0035] Figure 4 This is a schematic structural diagram of a heat exchange channel according to another embodiment of the present application;

[0036] Figure 5 This is a schematic structural diagram of a heat exchange channel in yet another embodiment of the present application;

[0037] Figure 6 This is a schematic structural diagram of a heat exchange channel in another embodiment of the present application;

[0038] Figure 7 This is a schematic diagram of the exploded structure of an embodiment of a heat sink according to an embodiment of the present application;

[0039] Figure 8 For along Figure 7 Partial cross-sectional view of section AA.

[0040] Description of Figure Numbers:

[0041] 100, radiator; 10, heat exchange channel; 11, heat exchange medium inlet; 12, heat exchange medium outlet; 13, inlet channel; 14, outlet channel; 15, first confluence channel; 16, circuitous channel; 161, first return channel; 162, second confluence channel; 163, second return channel; 164, third return channel; 165, third confluence channel; 166, fourth confluence channel; 17, flow diversion channel; 171, inlet section; 172, flow diversion section; 18 , collecting channel; 181, outflow section; 182, confluence section; 20, heat dissipation substrate; 21, flow channel groove; 211, notch; 30, cover body; 40, reinforcement part; 41, stamping groove; 50, inlet connector; 60, outlet connector; 300, energy storage device; 310, thermal management system; 320, compressor; 330, condenser; 340, heater; 350, plate exchanger; 360, four-way valve; X, first direction; Y, second direction.

[0042] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0043] In order to make the objectives, technical solutions and advantages of the present application clearer, the following part will further describe the embodiments of the present application in detail in conjunction with the accompanying drawings.

[0044] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0045] In the description of the present application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise specified, "multiple" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0047] See also Figure 1 On the one hand, the present application proposes an energy storage device 300, which can store energy for use in situations such as when there is a failure in the power generation equipment, and can be widely used in multiple scenarios such as the power generation side, the power transmission and distribution side, and the power consumption side.

[0048] In the embodiment of the present application, the energy storage device 300 includes an energy storage element (not shown in the figure), a heat sink 100 and a thermal management system 310 .

[0049] The energy storage element may include multiple groups of battery elements. For example, the battery element is a lithium battery, and the battery element has the functions of charging and discharging. It is understandable that the battery element will have a certain operating temperature during operation. If the operating temperature is higher than a preset temperature, such as higher than degrees Celsius, the life of the battery element will decay rapidly, and may even cause safety accidents, such as battery explosion accidents.

[0050] The radiator 100 is heat-transferably connected to the energy storage element to dissipate heat from the energy storage element, so that the operating temperature of the energy storage element is not higher than a preset temperature during operation, thereby effectively extending the service life of the energy storage element and greatly reducing the possibility of safety accidents.

[0051] The radiator 100 may include at least one of a direct cooling radiator, a liquid cooling radiator, and an air cooling radiator. The heat exchange medium in the direct cooling radiator is specifically a refrigerant, which dissipates heat from the energy storage element by phase change of the refrigerant, greatly improving the heat dissipation efficiency. The liquid cooling radiator and the air cooling radiator use liquid and wind flow as heat exchange mediums, respectively, which are not limited in this embodiment. In order to facilitate the description of the following content, the following embodiment takes the radiator 100 as a direct cooling radiator for detailed description.

[0052] The thermal management system 310 cooperates with the radiator 100 to adjust the temperature of the energy storage element, so that when the operating temperature of the energy storage element is too high, the temperature of the energy storage element is adjusted in time to make the temperature of the energy storage element lower than or equal to the preset temperature, thereby avoiding heat accumulation in the energy storage element.

[0053] Taking the example that the thermal management system 310 can deliver refrigerant to the radiator 100, the thermal management system 310 may include a compressor 320, a condenser 330, a four-way valve 360, and a heater 340. It is understandable that the compressor 320 will first compress the refrigerant in a low-temperature and low-pressure state, so that the refrigerant becomes a high-temperature and high-pressure state, and then the refrigerant in a high-temperature and high-pressure state will flow to the condenser 330 through the DC port of the four-way valve 360, and then after the action of the condenser 330, the refrigerant will become a liquid refrigerant, and then the liquid refrigerant will be sent to the direct cooling radiator to absorb the heat of the energy storage element to achieve the effect of heat dissipation of the energy storage element. After the heat dissipation is completed, the liquid refrigerant will become a refrigerant in a low-temperature and low-pressure state, and then flow to the heater 340 through the ES port of the four-way valve 360. After the heating action of the heater 340, the liquid originally existing in the refrigerant absorbs heat as much as possible and is converted into a gaseous state, and finally flows to the compressor 320 to achieve a complete cycle.

[0054] It is worth mentioning that the thermal management system 310 can further include a plate exchanger 350. The function of the plate exchanger 350 is: in some working scenarios, the liquid refrigerant flowing to the direct cooling radiator is heat exchanged with the low-temperature and low-pressure refrigerant flowing to the heater 340. For example, the temperature of the refrigerant flowing out of the condenser 330 is lower than the required temperature of the refrigerant in the direct cooling heat exchanger and the energy storage element. At this time, the refrigerant flowing out of the condenser 330 can be used to absorb part of the heat of the low-temperature and low-pressure refrigerant flowing to the heater 340, so that resources are used more reasonably, the heating power consumption of the heater 340 is saved, and it is beneficial to reduce the operating cost of the energy storage device 300.

[0055] In the related art, the heat dissipation effect of the heat sink 100 on the heat dissipation element is uneven, for example, the heat dissipation effect on different groups of battery elements of the energy storage element is inconsistent, which leads to a large temperature difference between different groups of battery elements, and then leads to a shorter service life of some groups of battery elements, affecting the overall service life of the energy storage element. Therefore, in order to solve this technical problem, please refer to Figures 1 to 3 The present application further proposes a radiator 100, which is applied to an energy storage device 300 and has a heat exchange channel 10, and the heat exchange channel 10 is used for the heat exchange medium to flow. The heat exchange channel 10 has a heat exchange medium inlet 11 and a heat exchange medium outlet 12, the heat exchange medium inlet 11 is used for the heat exchange medium to flow in, and the heat exchange medium is used for the heat exchange medium to flow out. The heat exchange channel 10 includes an inlet channel 13, a first confluence channel 15 and an outlet channel 14. The inlet channel 13 includes a plurality of channels, and the plurality of inlet channels 13 are all connected to the heat exchange medium inlet 11. The first confluence channel 15 includes a plurality of channels, and one end of each first confluence channel 15 is connected to at least two inlet channels 13. The outlet channel 14 includes a plurality of channels, and the other end of each first confluence channel 15 is connected to at least two outlet channels 14. The lengths of all the inlet channels 13 connected to the same first confluence channel 15 may be equal or unequal, and the lengths of all the outlet channels 14 connected to the same first confluence channel 15 may be equal or unequal, which is not limited in this embodiment.

[0056] When the heat exchange medium flows in the heat exchange channel 10, it can exchange heat with the heat element to be cooled, so as to absorb the heat of the heat element to be cooled, and realize the heat dissipation of the heat element to be cooled. Specifically, during the actual flow of the heat exchange medium in the heat exchange channel 10, the heat exchange medium can flow into the multiple inlet channels 13 through the heat exchange medium inlet 11, and then the heat exchange medium in at least two of the multiple inlet channels 13 converges and flows to one of the multiple first converging channels 15, and then the heat exchange medium in the first converging channel 15 is divided and flows to at least two outlet channels 14, and finally flows out of the heat exchange medium outlet 12 from the outlet channel 14.

[0057] To summarize, by setting the first confluence channel 15, the heat exchange medium flowing through different inlet channels 13 can converge in the first confluence channel 15, and then the heat exchange medium can be mixed in the first confluence channel 15, and the heat will be transferred from the high-temperature heat exchange medium to the low-temperature heat exchange medium to achieve thermal balance as much as possible, and then the heat will be diverted by the first confluence channel 15 to at least two outlet channels 14. In this way, the present embodiment can use the first confluence channel 15 to mix the heat exchange medium to achieve thermal balance, and prevent the occurrence of excessive temperature difference between the heat exchange medium flowing to different outlet channels 14, so that the heat dissipation effect of the radiator 100 on different areas of the heat dissipation element is more uniform, which is beneficial to improving the overall temperature difference of the heat dissipation element to be cooled, or is beneficial to improving the temperature difference between different groups of battery components of the heat dissipation element to be cooled, and effectively prolonging the service life of the heat dissipation element to be cooled.

[0058] In addition, on the basis that the flow areas of the inlet channel 13, the outlet channel 14 and the first confluence channel 15 remain unchanged, the multiple configurations of the inlet channel 13, the outlet channel 14 and the first confluence channel 15 can effectively increase the total contact area between the radiator 100 and the heat dissipation element to be cooled, which helps to improve the heat dissipation effect of the radiator 100 on the heat dissipation element to be cooled. Figure 3 In some embodiments, the lengths of all the inlet channels 13 connected to the same first confluence channel 15 are equal. In this way, on the basis of the flow area of ​​the multiple inlet channels 13 connected to the same first confluence channel 15 being unchanged, the temperature difference of the heat exchange medium flowing through different inlet channels 13 can be made small, so as to improve the heat dissipation uniformity of the area where at least two inlet channels 13 connected to the same first confluence channel 15 in the radiator 100 are located to the heat sink.

[0059] The lengths of all the outlet channels 14 connected to the same first confluence channel 15 are equal. In this way, on the basis of the flow area of ​​the multiple outlet channels 14 connected to the same first confluence channel 15 being unchanged, the temperature difference of the heat exchange medium flowing through different outlet channels 14 can be made small, so as to improve the heat dissipation uniformity of the area where at least two outlet channels 14 connected to the same first confluence channel 15 in the radiator 100 are located to the heat sink.

[0060] See also Figure 3 Furthermore, the heat exchange medium inlet 11 and the heat exchange medium outlet 12 are located on the same side of the heat exchange channel 10. In this way, the extension direction of the inlet channel 13 and the extension direction of the outlet channel 14 can be set in opposite directions, so that after the heat exchange medium flows through the inlet channel 13, it will flow to the outlet channel 14 in a circuitous manner, thereby reducing the area of ​​the radiator 100 in the extension direction of the inlet channel 13, so that the overall area of ​​the radiator 100 is smaller.

[0061] Optionally, the heat exchange medium inlet 11 and the heat exchange medium outlet 12 are located on opposite sides of the heat exchange channel 10, so that the extension direction of the inlet channel 13 can be consistent with the extension direction of the outlet channel 14, so that after the heat exchange medium flows through the inlet channel 13, it can continue to flow along the outlet channel 14 without changing the flow direction, thereby appropriately reducing the pressure drop of the heat exchange medium.

[0062] On the basis that the heat exchange medium inlet 11 and the heat exchange medium outlet 12 are located on the same side of the heat exchange flow channel 10, in a specific embodiment, the heat exchange medium inlet 11 and the heat exchange medium outlet 12 are both one. In this way, only one heat exchange medium inlet 11 can be used to input the heat exchange medium, and only one heat exchange medium outlet 12 can be used to receive the heat exchanged heat exchange medium, which is convenient for collective control of the inflow and outflow of the heat exchange medium on the radiator 100, and the operation is convenient, and the structure is relatively simple.

[0063] In another specific embodiment, the heat exchange medium inlet 11 includes two, the two heat exchange medium inlets 11 are arranged at intervals, and the heat exchange medium outlet 12 is located between the two heat exchange medium inlets 11. It can be understood that a part of the multiple inlet channels 13 is connected to one of the heat exchange medium inlets 11, and another part is connected to another heat exchange medium inlet 11. In this way, the arrangement area of ​​the inlet channel 13 and the outlet channel 14 can be flexibly adjusted according to the actual heat dissipation requirements of the heat element to be cooled and the setting positions of the heat exchange medium inlet 11 and the heat exchange medium outlet 12.

[0064] In another specific embodiment, the heat exchange medium outlet 12 includes two, the two heat exchange medium outlets 12 are arranged at intervals, and the heat exchange medium inlet 11 is located between the two heat exchange medium outlets 12. It can be understood that a part of the multiple outlet channels 14 is connected to one of the heat exchange medium outlets 12, and another part is connected to another heat exchange medium outlet 12. In this way, the arrangement area of ​​the inlet channel 13 and the outlet channel 14 can be flexibly adjusted according to the actual heat dissipation requirements of the heat element to be cooled and the setting positions of the heat exchange medium inlet 11 and the heat exchange medium outlet 12.

[0065] See also Figure 3 In some embodiments, the inlet channel 13 may extend along a first direction X, and the first direction X points from the side where the heat exchange medium inlet 11 is located to the side where the first confluence channel 15 is located. It can be understood that the inlet channel 13 is used to guide the heat exchange medium to flow along the first direction X. The side where the heat exchange medium inlet 11 is located and the side where the first confluence channel 15 is located are opposite sides of the heat exchange channel 10.

[0066] The plurality of inlet channels 13 are arranged equidistantly along a direction perpendicular to the first direction X. Thus, the region where the plurality of inlet channels 13 are located as a whole has a uniform heat dissipation effect on the heat dissipating element, which is beneficial to improving the overall temperature difference of the heat dissipating element.

[0067] Alternatively, the plurality of outlet channels 14 are arranged equidistantly along a direction perpendicular to the first direction X. In this way, the region where the plurality of outlet channels 14 are located as a whole has a uniform heat dissipation effect on the heat dissipating element, which is beneficial to improving the overall temperature difference of the heat dissipating element.

[0068] Alternatively, the plurality of first conduits 15 are arranged equidistantly along the first direction X. In this way, the region where the plurality of first conduits 15 are located as a whole has a uniform heat dissipation effect on the heat dissipating element, which is beneficial to improving the overall temperature difference of the heat dissipating element.

[0069] Alternatively, the plurality of inlet channels 13 are arranged equidistantly along a direction perpendicular to the first direction X, and the plurality of outlet channels 14 are arranged equidistantly along a direction perpendicular to the first direction X. In this way, the region where the plurality of inlet channels 13 and the region where the plurality of outlet channels 14 are located have uniform heat dissipation effects on the heat dissipating element to be cooled, thereby facilitating improvement of the overall temperature difference of the heat dissipating element to be cooled.

[0070] Alternatively, the plurality of inlet channels 13 are arranged equidistantly along a direction perpendicular to the first direction X, and the plurality of first confluence channels 15 are arranged equidistantly along the first direction X. In this way, the region where the plurality of inlet channels 13 and the region where the plurality of first confluence channels 15 are located have uniform heat dissipation effects on the heat dissipating element to be cooled, thereby facilitating improvement of the overall temperature difference of the heat dissipating element to be cooled.

[0071] Alternatively, the plurality of outlet channels 14 are arranged equidistantly along a direction perpendicular to the first direction X, and the plurality of first converging channels 15 are arranged equidistantly along the first direction X. In this way, the area where the plurality of outlet channels 14 are located as a whole and the area where the plurality of first converging channels 15 are located as a whole both have a uniform heat dissipation effect on the heat dissipating element to be cooled, thereby facilitating improvement of the overall temperature difference of the heat dissipating element to be cooled.

[0072] Alternatively, the plurality of inlet channels 13 are arranged equidistantly along a direction perpendicular to the first direction X, the plurality of outlet channels 14 are arranged equidistantly along a direction perpendicular to the first direction X, and the plurality of first converging channels 15 are arranged equidistantly along the first direction X. In this way, the region where the plurality of inlet channels 13 are located as a whole, the region where the plurality of outlet channels 14 are located as a whole, and the region where the plurality of first converging channels 15 are located as a whole have a uniform heat dissipation effect on the heat dissipating element to be cooled, thereby facilitating improvement of the overall temperature difference of the heat dissipating element to be cooled.

[0073] Please refer to Figures 4 to 5In some embodiments, the heat exchange flow channel 10 further includes a detour flow channel 16 , and the plurality of first converging flow channels 15 are connected to the plurality of outlet flow channels 14 through the detour flow channel 16 .

[0074] It can be understood that after the heat exchange medium flows from the inlet channel 13 to the first confluence channel 15, it will flow to the detour channel 16 to achieve detour, and then flow from the detour channel 16 to the outlet channel 14. This arrangement can increase the flow path length of the heat exchange medium in the radiator 100 to improve the utilization rate of the heat exchange medium, thereby reducing the power consumption of the compressor 320 and reducing operating costs.

[0075] See also Figure 4 In a specific embodiment, the circuitous flow channel 16 includes a plurality of first return flow channels 161, the other end of each first converging channel 15 is connected to at least two first return flow channels 161, and each outlet flow channel 14 is connected to at least one first return flow channel 161. It can be understood that the inlet flow channel 13 and the outlet flow channel 14 both extend along the first direction X, so that the heat exchange medium can first flow from the inlet flow channel 13 to the first converging channel 15, then flow from the first converging channel 15 to the first return flow channel 161, and then flow from the first return flow channel 161 to the outlet flow channel 14.

[0076] In this way, by providing a plurality of first return channels 161 , the total contact area between the detour channel 16 and the heat exchange component can be increased, thereby improving the heat dissipation effect of the detour channel 16 on the heat exchange component.

[0077] Please continue reading Figure 4 Further, the circuitous flow channel 16 further includes one or more second confluence channels 162, one end of each second confluence channel 162 is connected to at least two first return channels 161, and the other end is connected to at least two outlet channels 14. It can be understood that the heat exchange medium can first flow from the inlet channel 13 to the first confluence channel 15, then flow from the first confluence channel 15 to the first return channel 161, then flow from the first return channel 161 to the second confluence channel 162, and finally flow from the second confluence channel 162 to the outlet channel 14.

[0078] In this way, the heat exchange medium flowing through different first confluence channels 15 can converge in the second confluence channel 162, and then the heat exchange medium can be mixed in the second confluence channel 162, and heat will be transferred from the high-temperature heat exchange medium to the low-temperature heat exchange medium to achieve the greatest possible thermal balance, and then be diverted from the second confluence channel 162 to at least two outlet channels 14.

[0079] Please continue reading Figure 4In some embodiments, the inlet channel 13 has a first length, the first confluence channel 15 has a second length, the first return channel 161 has a third length, and the outlet channel 14 has a fourth length; the sum of the first length, the second length, the third length and the fourth length is the total length of the heat exchange medium flowing through the radiator 100.

[0080] Among them, for different first confluence channels 15, the first length, the third length and the fourth length are different, and the total flow length is the same. In this way, the total flow length of the heat exchange medium flowing through different first confluence channels 15 in the heat exchange channel 10 is consistent, so as to further ensure the heat dissipation uniformity of the radiator 100 to the heat dissipation element. Optionally, the difference between the total flow lengths corresponding to different first confluence channels 15 is less than 20% of the total flow length. In this way, the total flow length of the heat exchange medium flowing through different first confluence channels 15 in the heat exchange channel 10 is relatively close, so as to further ensure the heat dissipation uniformity of the radiator 100 to the heat dissipation element.

[0081] See also Figure 5 In another specific embodiment, the circuitous flow channel 16 includes at least a plurality of second return flow channels 163 and a plurality of third return flow channels 164. The other end of each first confluence channel 15 is connected to at least two second return flow channels 163, and the two ends of each third return flow channel 164 are respectively connected to at least one second return flow channel 163 and at least one outlet flow channel 14.

[0082] It can be understood that the inlet channel 13 extends along the first direction X, the outlet channel 14 extends along the second direction Y, and the outlet channel 14 is used to guide the heat exchange medium to flow along the second direction Y, so that the heat exchange medium can first flow from the inlet channel 13 to the first confluence channel 15, and then flow from the first confluence channel 15 to the second return channel 163, and then flow from the second return channel 163 to the third return channel 164, and finally flow from the third return channel 164 to the outlet channel 14.

[0083] In this way, on the one hand, by setting up multiple second return channels 163 and multiple third return channels 164, the total contact area between the detour channel 16 and the heat exchange component can be increased, thereby improving the heat dissipation effect of the detour channel 16 on the heat exchange component; on the other hand, the second return channel 163 and the third return channel 164 can be used to further increase the flow path length of the heat exchange medium in the radiator 100, so as to improve the utilization rate of the heat exchange medium, thereby reducing the power consumption of the compressor 320 and reducing the operating cost.

[0084] Please continue reading Figure 5 Furthermore, the circuitous flow channel 16 also includes one or more third confluence channels 165 , and one end of each third confluence channel 165 is connected to at least two second return channels 163 , and the other end is connected to at least two third return channels 164 .

[0085] It is understandable that the heat exchange medium can first flow from the inlet channel 13 to the first confluence channel 15, then flow from the first confluence channel 15 to the second return channel 163, then flow from the second return channel 163 to the third confluence channel 165, then flow from the third confluence channel 165 to the third return channel 164, and finally flow from the third return channel 164 to the outlet channel 14. In this way, the heat exchange medium flowing through different second return channels 163 can converge in the third confluence channel 165, and then the heat exchange medium can be mixed in the third confluence channel 165, and the heat will be transferred from the high-temperature heat exchange medium to the low-temperature heat exchange medium to achieve the greatest possible thermal balance, and then the heat will be diverted from the third confluence channel 165 to at least two third return channels 164.

[0086] Alternatively, the circuitous flow channel 16 further includes one or more fourth confluence channels 166, one end of each fourth confluence channel 166 is connected to at least two third return channels 164, and the other end is connected to at least two outlet channels 14. It is understandable that the heat exchange medium may first flow from the inlet channel 13 to the first confluence channel 15, then flow from the first confluence channel 15 to the second return channel 163, then flow from the second return channel 163 to the third return channel 164, then flow from the third return channel 164 to the fourth confluence channel 166, and finally flow from the fourth confluence channel 166 to the outlet channel 14. In this way, the heat exchange medium flowing through different third return channels 164 can converge in the fourth confluence channel 166, and then the heat exchange medium can be mixed in the fourth confluence channel 166, and heat will be transferred from the high-temperature heat exchange medium to the low-temperature heat exchange medium to achieve the greatest possible thermal balance, and then be diverted from the fourth confluence channel 166 to at least two outlet channels 14.

[0087] Alternatively, the circuitous flow channel 16 also includes one or more third confluence channels 165 and one or more fourth confluence channels 166, one end of each third confluence channel 165 is connected to at least two second return channels 163, and the other end is connected to at least two third return channels 164, and one end of each fourth confluence channel 166 is connected to at least two third return channels 164, and the other end is connected to at least two outlet channels 14.

[0088] It can be understood that the heat exchange medium can first flow from the inlet channel 13 to the first confluence channel 15, then flow from the first confluence channel 15 to the second return channel 163, then flow from the second return channel 163 to the third confluence channel 165, then flow from the third confluence channel 165 to the third return channel 164, flow from the third return channel 164 to the fourth confluence channel 166, and finally flow from the fourth confluence channel 166 to the outlet channel 14.

[0089] In this way, the heat exchange mediums flowing through different second return channels 163 can converge in the third converging channel 165, and then the heat exchange mediums can be mixed in the third converging channel 165, and the heat will be transferred from the high-temperature heat exchange medium to the low-temperature heat exchange medium to achieve the best possible thermal balance, and then the heat will be diverted from the third converging channel 165 to at least two third return channels 164. At the same time, the heat exchange mediums flowing through different third return channels 164 can converge in the fourth converging channel 166, and then the heat exchange mediums can be mixed in the fourth converging channel 166, and the heat will be transferred from the high-temperature heat exchange medium to the low-temperature heat exchange medium to achieve the best possible thermal balance, and then the heat will be diverted from the fourth converging channel 166 to at least two outlet channels 14.

[0090] Please continue reading Figure 6 In some embodiments, the inlet channel 13 extends along a first direction X, and the first direction X points from the side where the heat exchange medium inlet 11 is located to the side where the first confluence channel 15 is located. The side where the heat exchange medium inlet 11 is located and the side where the first confluence channel 15 is located are opposite sides of the heat exchange channel 10.

[0091] The detour flow channel 16 includes a plurality of detour flow channels 16, which are arranged at intervals in a direction perpendicular to the first direction X and are connected in sequence, wherein, among the plurality of detour flow channels 16, along the flow direction of the heat exchange medium in the heat exchange flow channel 10, the second return flow channel 163 of a detour flow channel 16 closest to the heat exchange medium inlet 11 is connected to the first confluence channel 15, and the third return flow channel 164 of a detour flow channel 16 closest to the heat exchange medium outlet 12 is connected to the outlet flow channel 14, and in two adjacent detour flow channels 16, each third return flow channel 164 of one is connected to at least one second return flow channel 163 of the other. In this way, by setting up a plurality of detour flow channels 16, the flow path length of the heat exchange medium in the radiator 100 can be further increased to improve the utilization rate of the heat exchange medium, thereby reducing the power consumption of the compressor 320 and reducing the operating cost.

[0092] Exemplarily, the number of the circuitous flow passages 16 may be two, three, four or five, etc., which is not limited in this embodiment.

[0093] Please refer to Figures 5 and 6In some embodiments, the heat exchange channel 10 further includes a flow diversion channel 17, the flow diversion channel 17 includes an inlet section 171 and a plurality of flow diversion sections 172 that are all connected to the inlet section 171, the inlet section 171 is connected to the heat exchange medium inlet 11, and the plurality of flow diversion sections 172 are respectively connected to the plurality of flow inlets 13. In this way, the heat exchange medium flowing in from the heat exchange medium inlet 11 can be diverted to each flow inlet 13 by using the plurality of flow diversion sections 172 of the flow diversion channel 17, and thus, compared with the form in which the heat exchange medium inlet 11 is directly connected to the plurality of flow inlets 13, the form of this embodiment can make the temperature difference of the heat exchange medium flowing through the plurality of flow inlets 13 smaller, which is conducive to improving the uniformity of heat dissipation.

[0094] Please refer to Figures 5 and 6 In some embodiments, the heat exchange flow channel 10 further includes a collector 18, which includes an outflow section 181 and a plurality of converging sections 182 that are all connected to the outflow section 181, the outflow section 181 is connected to the heat exchange medium outlet 12, and the plurality of converging sections 182 are respectively connected to the plurality of outflow channels 14. In this way, the collector 18 can be used to collect the heat exchange media flowing out of each outflow channel 14 and then flow out from the same heat exchange medium outlet 12, which is convenient for controlling the flow direction of the heat exchange medium.

[0095] Please refer to Figures 5 and 6 In some embodiments, the heat exchange channel 10 further includes a branch channel 17 and a collecting channel 18. One end of the branch channel 17 is connected to the heat exchange medium inlet 11, and the other end is connected to multiple inlet channels 13. One end of the collecting channel 18 is connected to the heat exchange medium outlet 12, and the other end is connected to multiple outlet channels 14. In this way, the branch channel 17 can be used to divert the heat exchange medium flowing in from the heat exchange medium inlet 11 to each inlet channel 13. In this way, compared with the form in which the heat exchange medium inlet 11 is directly connected to multiple inlet channels 13, the form of this embodiment can make the temperature difference of the heat exchange medium flowing through multiple inlet channels 13 smaller, which is conducive to improving the uniformity of heat dissipation. At the same time, the collecting channel 18 can be used to collect the heat exchange medium flowing out of each outlet channel 14 and then flow out from a heat exchange medium outlet 12, which is convenient for controlling the flow direction of the heat exchange medium.

[0096] See also Figure 7In some embodiments, the heat sink 100 includes a heat sink base 20 and a cover 30. The heat sink base 20 and the cover 30 may both be plate-shaped, and the heat sink base 20 and the cover 30 may be made of metal materials such as aluminum, copper or steel, so as to have excellent thermal conductivity, thereby improving the thermal conduction effect between the heat sink 100 and the energy storage element. This embodiment does not specifically limit the shape and material of the heat sink base 20 and the cover 30. Exemplarily, the energy storage element can contact the cover 30 to achieve a thermal connection between the energy storage element and the heat sink 100, and a thermal conductive adhesive (not shown in the figure) may be provided between the energy storage element and the cover 30, which can improve the stability of the connection between the energy storage element and the cover 30 on the one hand, and further improve the heat transfer efficiency between the energy storage element and the cover 30 on the other hand.

[0097] Among them, the cover body 30 is covered on the heat dissipation base 20, and the cover body 30 and the heat dissipation base 20 can be fixedly connected by welding, bonding, etc. For example, the cover body 30 and the heat dissipation base 20 are connected by brazing. In this way, damage to the cover body 30 and the heat dissipation base 20 can be avoided during the brazing process to ensure the dimensional accuracy of the cover body 30 and the heat dissipation base 20.

[0098] The cover body 30 and the heat dissipation base 20 cooperate to form a heat exchange channel 10. For example, the cover body 30 has a first half groove, and the heat dissipation base 20 has a second half groove. When the cover body 30 and the heat dissipation base 20 are connected, the first half groove is connected to the second half groove to form the heat exchange channel 10.

[0099] In this embodiment, the cover body 30 or the heat dissipation base 20 can be in contact with the heat dissipation element to be cooled to achieve a heat transfer connection with the heat dissipation element. In this way, on the one hand, the contact area between the cover body 30 or the heat dissipation base 20 and the heat dissipation element to be cooled is large, which can effectively improve the heat conduction efficiency. On the other hand, the cover body 30 and the heat dissipation base 20 have a small number of structures, which is easy to assemble, and effectively improves the manufacturing efficiency of the radiator 100.

[0100] See also Figure 7 In some exemplary structural forms, the radiator 100 further includes an inlet joint 50 and an outlet joint 60, wherein the inlet joint 50 and the outlet joint 60 are both connected to the first manifold, and the inlet joint 50 is connected to the heat exchange medium inlet 11, and the outlet joint 60 is connected to the heat exchange medium outlet 12. In this way, when the pipeline for transmitting the heat exchange medium is connected to the heat exchange medium inlet 11 and the heat exchange medium outlet 12, the inlet joint 50 and the outlet joint 60 can be connected to each other, which is convenient for operation.

[0101] See also Figure 7Furthermore, the surface of the heat dissipation base 20 is recessed in a direction away from the cover 30 to form a flow channel 21, wherein the flow channel 21 can be formed by stamping, which has high manufacturing efficiency. The surface of the cover 30 facing the heat dissipation base 20 cooperates with the groove wall surface of the flow channel 21 to enclose the heat exchange flow channel 10.

[0102] In this way, by utilizing the design of the flow channel groove 21, the overall structural strength of the heat dissipation base 20 can be effectively improved, so that the heat dissipation base 20 has good pressure resistance. Therefore, even if the heat exchange medium flowing through the heat exchange flow channel 10 exerts a large pressure on the heat dissipation base 20 when flowing at high speed, the heat dissipation base 20 can avoid damage to itself through its own better pressure resistance.

[0103] Please refer to Figures 7 and 8 In some embodiments, the heat dissipation substrate 20 may be in a plate-like structure, so the heat dissipation substrate 20 has a length direction, a width direction and a thickness direction, and the length direction, the width direction and the thickness direction are perpendicular to each other. It can be understood that the length direction may be parallel to the first direction X mentioned above.

[0104] The heat sink 100 satisfies at least one of the following conditions:

[0105] Along the thickness direction of the heat dissipation substrate 20, the depth of the flow channel groove 21 is H, and satisfies: 1mm≤H≤4.5mm. In this way, while ensuring the pressure resistance of the heat dissipation substrate 20, the strength of the heat dissipation substrate 20 is prevented from being reduced. If H is less than 1mm, the groove depth of the flow channel groove 21 will be too shallow, which will make the pressure resistance of the heat dissipation substrate 20 poor. If H is greater than 4.5mm, the groove depth of the flow channel groove 21 will be too deep, which will also reduce the overall strength of the heat dissipation substrate 20.

[0106] For example, the specific value of H may be 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm or 5 mm, etc., which is not limited in this embodiment.

[0107] Along the width direction of the heat dissipation base 20, the width of the notch 211 of the flow channel groove 21 is L1, and satisfies: 5mm≤L1≤25mm. In this way, while improving the heat dissipation effect of the heat dissipation base 20, it is ensured that the heat dissipation base 20 has good pressure resistance. If L1 is less than 5mm, the width of the notch 211 of the flow channel groove 21 will be too small, which will lead to a smaller flow area of ​​the flow channel groove 21 for the heat exchange medium, affecting the heat dissipation effect. If L1 is greater than 25mm, the width of the notch 211 of the flow channel groove 21 will be too large, which will lead to a smaller number of inlet channels 13 and outlet channels 14, which will not only affect the overall heat dissipation effect of the radiator 100, but also affect the pressure resistance of the heat dissipation base 20.

[0108] For example, the specific value of L1 may be 5 mm, 10 mm, 15 mm, 20 mm or 25 mm, etc., which is not limited in this embodiment.

[0109] Along the width direction of the heat dissipation base 20, at least one of the spacing between two adjacent inlet channels 13 and the spacing between two adjacent outlet channels 14 is L2, and satisfies: 5mm≤L2≤20mm. In this way, the overall heat dissipation effect of the radiator 100 can be improved while ensuring the structural strength of the heat dissipation base 20. If L2 is less than 5mm, the spacing will be too small, so that the number of flow channel grooves 21 formed by the heat dissipation base 20 is too large, affecting the structural strength of the heat dissipation base 20. If L2 is greater than 20mm, the spacing will be too large, which will result in too few flow channel grooves 21, affecting the heat dissipation effect of the heat dissipation base 20, and further affecting the overall heat dissipation effect of the radiator 100.

[0110] For example, the specific value of L2 may be 5 mm, 10 mm, 15 mm or 20 mm, etc., which is not limited in this embodiment.

[0111] Along the thickness direction of the heat dissipation substrate 20, the thickness of the heat dissipation substrate 20 is T, and satisfies: T ≥ 1.2 mm. In this way, the structural strength of the heat dissipation substrate 20 is improved to improve the pressure resistance of the heat dissipation substrate 20. If T is less than 1.2 mm, the thickness of the heat dissipation substrate 20 will be too small, which will lead to insufficient structural strength of the heat dissipation substrate 20 and affect the pressure resistance of the heat dissipation substrate 20.

[0112] For example, the specific value of T may be 1.2 mm, 1.5 mm, 1.8 mm, 2 mm, 2.2 mm, 2.5 mm, 2.8 mm, 3 mm, etc., which is not limited in this embodiment.

[0113] See also Figure 7 In some embodiments, at least one of the heat dissipation substrate 20 and the cover 30 is provided with a reinforcing portion 40, and the reinforcing portion 40 is spaced apart from the heat exchange channel 10. In this way, the structural strength of at least one of the heat dissipation substrate 20 and the cover 30 can be effectively improved, thereby ensuring the pressure resistance of at least one of the heat dissipation substrate 20 and the cover 30.

[0114] The reinforcement portion 40 includes at least one of a stamping groove 41 and a reinforcement rib (not shown in the figure), which facilitates processing and improves processing efficiency.

[0115] Further, taking the reinforcing portion 40 as a stamping groove 41 as an example, the stamping groove 41 may include a vertical stamping groove 41 and a horizontal stamping groove 41, the vertical stamping groove 41 is connected to the horizontal stamping groove 41, and the two are arranged vertically, so that the pressure resistance of at least one of the heat dissipation substrate 20 and the cover body 30 can be further improved in two directions. The same or similar reference numerals in the drawings of this embodiment correspond to the same or similar components; in the description of this application, it should be understood that if there are terms such as "upper", "lower", "left", "right" and the like indicating the orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so the terms describing the position relationship in the drawings are only used for exemplary description and cannot be understood as a limitation of this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances. The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A radiator for an energy storage device, characterized in that: A heat exchange channel is provided, wherein the heat exchange channel has a heat exchange medium inlet and a heat exchange medium outlet; the heat exchange channel comprises: A plurality of flow inlets, wherein the plurality of flow inlets are all connected to the heat exchange medium inlet; A plurality of outlet channels, wherein the plurality of outlet channels are all connected to the heat exchange medium outlet; and A plurality of first confluence channels, one end of each of the first confluence channels is communicated with at least two of the inlet channels, and the other end of each of the first confluence channels is communicated with at least two of the outlet channels.

2. The heat sink according to claim 1, characterized in that The lengths of all the inlet channels connected to the same first confluence channel are equal, and the lengths of all the outlet channels connected to the same first confluence channel are equal.

3. The heat sink according to claim 2, characterized in that The heat exchange medium inlet and the heat exchange medium outlet are located on the same side of the heat exchange channel, or on two opposite sides.

4. The heat sink according to claim 3, characterized in that The heat exchange medium inlet and the heat exchange medium outlet are both one; or, The heat exchange medium inlets include two, the two heat exchange medium inlets are arranged at intervals, and the heat exchange medium outlet is located between the two heat exchange medium inlets; or, The heat exchange medium outlets include two, the two heat exchange medium outlets are arranged at intervals, and the heat exchange medium inlet is located between the two heat exchange medium outlets.

5. The heat sink according to claim 1, characterized in that The inlet channel extends along a first direction, the first direction points from the side where the heat exchange medium inlet is located to the side where the first confluence channel is located, and the side where the heat exchange medium inlet is located and the side where the first confluence channel is located are two opposite sides of the heat exchange channel; Wherein, the plurality of inlet channels are arranged equidistantly along a direction perpendicular to the first direction; and / or, The plurality of outlet channels are arranged equidistantly along a direction perpendicular to the first direction; and / or, A plurality of the first bus channels are arranged equidistantly along the first direction.

6. The radiator according to any one of claims 1 to 5, characterized in that: The heat exchange channel also includes: A detour flow channel, wherein the plurality of first confluence channels are connected to the plurality of outlet flow channels through the detour flow channel.

7. The heat sink according to claim 6, characterized in that The circuitous flow channel comprises: There are a plurality of first return channels, the other end of each of the first confluence channels is communicated with at least two of the first return channels, and each of the outlet channels is communicated with at least one of the first return channels.

8. The heat sink according to claim 7, characterized in that The circuitous flow channel further comprises: One or more second confluence channels, one end of each of the second confluence channels is connected to at least two of the first return channels, and the other end is connected to at least two of the outlet channels.

9. The heat sink according to claim 7, characterized in that: The inlet channel has a first length, the first confluence channel has a second length, the first return channel has a third length, and the outlet channel has a fourth length; the sum of the first length, the second length, the third length, and the fourth length is the total length of the heat exchange medium flowing through the radiator; Among them, for different first conduits, the first length, the third length and the fourth length are different, and the total flow length is the same, or the difference between the total flow lengths corresponding to different first conduits is less than 20% of the total flow length.

10. The heat sink according to claim 6, characterized in that The circuitous flow channel at least comprises: a plurality of second return channels, wherein the other end of each of the first confluence channels is connected to at least two of the second return channels; and A plurality of third return channels, both ends of each of the third return channels are respectively connected to at least one of the second return channels and at least one of the outlet channels.

11. The heat sink according to claim 10, characterized in that The circuitous flow channel further comprises: One or more third confluence channels, one end of each of the third confluence channels is connected to at least two of the second return channels, and the other end is connected to at least two of the third return channels; and / or, One or more fourth confluence channels, one end of each of the fourth confluence channels is connected to at least two of the third return channels, and the other end is connected to at least two of the outlet channels.

12. The heat sink according to claim 10, characterized in that The inlet channel extends along a first direction, the first direction points from the side where the heat exchange medium inlet is located to the side where the first confluence channel is located, the side where the heat exchange medium inlet is located and the side where the first confluence channel is located are opposite sides of the heat exchange channel; the detour channel includes a plurality of detour channels, the plurality of detour channels are arranged in a direction perpendicular to the first direction and are connected in sequence; Among them, among the multiple detour flow channels, along the flow direction of the heat exchange medium in the heat exchange flow channel, the second return flow channel of the detour flow channel closest to the heat exchange medium inlet is connected to the first confluence channel, and the third return flow channel of the detour flow channel closest to the heat exchange medium outlet is connected to the outlet flow channel, and in two adjacent detour flow channels, each of the third return flow channels of one of them is connected to at least one of the second return flow channels of the other one.

13. The radiator according to any one of claims 1 to 5, characterized in that: The heat exchange channel also includes: A flow branch channel comprises an inlet section and a plurality of flow branch sections connected to the inlet section, the inlet section is connected to the heat exchange medium inlet, and the plurality of flow branch sections are respectively connected to the plurality of inlet channels; and / or, The collecting channel comprises an outflow section and a plurality of converging sections which are all connected to the outflow section, the outflow section is connected to the heat exchange medium outlet, and the plurality of converging sections are respectively connected to the plurality of outflow channels.

14. The radiator according to any one of claims 1 to 5, characterized in that: The radiator comprises: a heat sink substrate; and The cover body is disposed on the heat dissipation base body and cooperates with the heat dissipation base body to enclose the heat exchange flow channel.

15. The heat sink according to claim 14, characterized in that The surface of the heat dissipation substrate is recessed in a direction away from the cover to form a flow channel groove, and the surface of the cover facing the heat dissipation substrate cooperates with the groove wall surface of the flow channel groove to enclose the heat exchange flow channel.

16. The heat sink according to claim 15, characterized in that The heat sink meets at least one of the following conditions: Along the thickness direction of the heat dissipation substrate, the depth of the flow channel groove is H and satisfies: 1mm≤H≤4.5mm; Along the width direction of the heat dissipation substrate, the width of the channel groove is L1, and satisfies: 5mm≤L1≤25mm; Along the width direction of the heat dissipation substrate, at least one of the distance between two adjacent inlet channels and the distance between two adjacent outlet channels is L2, and satisfies: 5mm≤L2≤20mm; Along the thickness direction of the heat dissipation substrate, the thickness of the heat dissipation substrate is T, and satisfies: T≥1.2 mm.

17. The heat sink according to claim 14, wherein: At least one of the heat dissipation base and the cover is provided with a reinforcement portion spaced apart from the heat exchange flow channel, and the reinforcement portion includes at least one of a stamping groove and a reinforcement rib.

18. An energy storage device, characterized in that: include: The radiator according to any one of claims 1 to 17; An energy storage element, thermally connected to the heat sink; as well as A thermal management system cooperates with the heat sink to adjust the temperature of the energy storage element.

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