Heat exchange apparatus and energy storage apparatus

Abstract

Disclosed are a heat exchange apparatus and an energy storage apparatus. The heat exchange apparatus comprises a housing, which comprises an inner cavity and an air inlet and an air outlet that are in communication with the inner cavity; a heat exchange assembly, which comprises a condenser, the condenser being disposed in the inner cavity and being located between the air inlet and the air outlet; and a cross-flow fan, which is disposed in the inner cavity, the cross-flow fan comprising a rotatable cross-flow impeller, and the cross-flow impeller being located between the condenser and the air outlet.

Description

Heat exchange device and energy storage device Technical Field

[0001] The present disclosure relates to the field of new energy technology, and in particular to a heat exchange device and an energy storage device. Background Art

[0002] With the rapid development of new energy technologies, energy storage devices have become one of the more important research directions in the field of new energy. As a key device in energy storage devices, the heat exchange efficiency and noise issues of heat exchangers have attracted much attention.

[0003] Summary of the Invention

[0004] In order to solve the above technical problems, the present disclosure provides a heat exchange device and an energy storage device with high heat exchange efficiency and low noise.

[0005] The present disclosure is achieved through the following technical solutions.

[0006] A first aspect of the present disclosure provides a heat exchange device, comprising a shell, comprising an inner cavity and an air inlet and an air outlet connected to the inner cavity; a heat exchange component, comprising a condenser, wherein the condenser is arranged in the inner cavity and located between the air inlet and the air outlet; and a cross-flow fan, arranged in the inner cavity, wherein the cross-flow fan comprises a rotatable cross-flow impeller, wherein the cross-flow impeller is located between the condenser and the air outlet.

[0007] The cross-flow impeller of the cross-flow fan rotates to take away the heat in the inner cavity of the shell and cool the condenser at the same time. Compared with the axial flow fan arranged in the shell, the cross-flow fan can generate higher air pressure at a lower speed, so that the coverage area of ​​the air flow when flowing through the condenser is larger and more uniform, thereby improving the heat exchange efficiency and reducing noise. In addition, since the cross-flow fan is located in the inner cavity, it can further reduce noise compared with the axial flow fan arranged outside the shell.

[0008] In some embodiments, the air outlet is configured as a long strip extending along a first direction, and the extending direction of the rotation axis of the cross-flow blower is consistent with the first direction.

[0009] By aligning the extension direction of the cross-flow fan's rotating shaft with the length direction of the air outlet, the cross-flow fan is more compatible with the air outlet and the air outlet is smoother, which is conducive to further reducing noise and improving heat exchange efficiency.

[0010] In some embodiments, along the first direction, the cross-flow impeller extends from one end to the other end of the air outlet.

[0011] The cross-flow impeller can cover the long strip-shaped air outlet in the direction of the rotation axis, increase the air outlet area, further reduce noise and improve the heat dissipation effect.

[0012] In some embodiments, the cross-flow fan and the condenser are arranged on a side adjacent to the air outlet.

[0013] By arranging the cross-flow fan and condenser on the side adjacent to the air outlet, the air outlet path is shortened, the air outlet is smoother, and the heat dissipation effect is improved.

[0014] In some embodiments, the maximum distance between the rotation axis of the cross-flow impeller and one end of the condenser is substantially equal to the maximum distance between the rotation axis of the cross-flow impeller and the other end of the condenser.

[0015] The maximum distance between the rotation axis of the cross-flow impeller and one end of the condenser is roughly equal to the maximum distance between the rotation axis of the cross-flow fan and the other end of the condenser. When the cross-flow impeller rotates, the airflow can cover the entire condenser as evenly as possible when passing through the condenser, thereby increasing the area of ​​the airflow passing through the condenser, improving the heat exchange efficiency of the condenser and reducing noise.

[0016] In some embodiments, the closest distance between the rim of the cross-flow impeller and the condenser is greater than or equal to 10% of the radius of the cross-flow impeller.

[0017] The appropriate distance between the cross-flow impeller and the condenser helps to force airflow over the entire condenser, accelerate heat dissipation, thereby improving heat exchange efficiency and reducing noise.

[0018] In some embodiments, the condenser includes a first surface facing the cross-flow blower, and the first surface includes at least one flat surface or at least one curved surface.

[0019] The curved surface can increase the heat exchange area of ​​the condenser and improve the heat exchange efficiency.

[0020] In some embodiments, a projection of the first surface of the condenser along a second direction on the plane where the air outlet is located at least partially overlaps with the air outlet, and the second direction is perpendicular to the first direction.

[0021] By overlapping the first side of the condenser with the air outlet, the first side of the condenser faces the outlet, which reduces wind resistance, makes air outlet smoother, and reduces noise.

[0022] In some embodiments, the first surface is a plane and is tilted relative to the second direction.

[0023] The inclined condenser can increase the heat exchange area, thereby improving the heat exchange efficiency of the heat exchange device.

[0024] In some embodiments, the first surface is an arcuate surface and partially surrounds the cross-flow impeller.

[0025] Such arrangement of the cross-flow impeller and the condenser also helps to increase the heat exchange area while allowing the air flow to be quickly directed out of the shell.

[0026] In some embodiments, the first surface of the condenser is an arc surface, and the rotation axis of the cross-flow impeller coincides with the arc center of the arc surface.

[0027] The rotation axis of the cross-flow impeller coincides with the arc center of the arc surface of the condenser, so that the distance from the rotation axis of the cross-flow impeller to each position of the arc surface of the condenser is the same, thereby further improving the uniformity of the airflow through the condenser, improving the heat exchange efficiency of the condenser, and reducing noise.

[0028] In some embodiments, the shell includes a first shell wall and a second shell wall opposite to each other along a third direction, the air outlet is located between the first shell wall and the second shell wall, the two ends of the condenser are respectively arranged on the first shell wall and the second shell wall, and the third direction is perpendicular to both the first direction and the second direction.

[0029] The two ends of the condenser are respectively arranged on the first shell wall and the second shell wall, which reduces the possibility of wind leakage between the condenser and the shell, thereby allowing more air to pass through the condenser and improving heat exchange efficiency.

[0030] In some embodiments, the cross-flow fan includes a fan housing and a cross-flow impeller rotatably disposed in the fan housing. The fan housing includes an inner guide surface, and the inner guide surface is used to guide the airflow toward the air outlet side.

[0031] The inner guide surface allows the air to be discharged more smoothly from the air outlet, reducing wind resistance and noise.

[0032] In some embodiments, the heat exchange assembly further includes a compressor, an evaporator, and an expansion valve, and the compressor, the condenser, the evaporator, and the expansion valve are connected through a refrigerant circulation pipeline.

[0033] Through the refrigerant circulation loop, heat can be continuously exchanged for the batteries in the energy storage device, reducing the risk of battery thermal runaway.

[0034] A second aspect of the present disclosure provides an energy storage device, comprising: an energy storage box, which accommodates at least one battery; and a heat exchange device as described in any of the above embodiments, which is used to exchange heat with the battery.

[0035] In some embodiments, the heat exchange device is disposed in the energy storage box, and the energy storage box is provided with an exhaust port connected to the air outlet.

[0036] Beneficial effects of the embodiments of the present disclosure:

[0037] The present disclosure provides a heat exchange device and an energy storage device with high heat exchange efficiency and low noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present disclosure. The same reference numerals are used throughout the drawings to denote the same components. In the drawings:

[0039] FIG1 is a schematic structural diagram of a heat exchange device provided in some embodiments of the present disclosure;

[0040] FIG2 is an exploded schematic diagram of a battery pack provided by some embodiments of the present disclosure;

[0041] FIG3 is a schematic structural diagram of a battery module provided in some embodiments of the present disclosure;

[0042] FIG4 is an exploded schematic diagram of a heat exchange device provided in some embodiments of the present disclosure;

[0043] FIG5 is a schematic side view of a heat exchange device provided in some embodiments of the present disclosure;

[0044] FIG6 is a schematic top view of a heat exchange device provided in some embodiments of the present disclosure;

[0045] FIG7 is a schematic top view of a heat exchange device provided in other embodiments of the present disclosure;

[0046] FIG8 is a schematic top view of a heat exchange device provided in some other embodiments of the present disclosure;

[0047] FIG9 is a simplified structural diagram of a heat exchange assembly provided in some further embodiments of the present disclosure.

[0048] Explanation of the accompanying reference numerals: 1000 - energy storage device; 110 - energy storage box; 120 - battery; 1 - battery cell; 2 - bottom plate; 3 - vertical plate; 4 - cover; 100 - heat exchange device; 10 - housing; 11 - air inlet; 12 - air outlet; 10a - inner cavity; 20 - heat exchange component; 21 - condenser; 22 - compressor; 23 - evaporator; 24 - expansion valve; 21a - first end; 21b - second end; 30 - cross-flow fan; 31 - cross-flow impeller; 32 - fan casing; O - rotation axis; L - surface where the center of the housing is located. DETAILED DESCRIPTION

[0049] The following embodiments of the technical solution of the present disclosure are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present disclosure and are therefore only examples and are not intended to limit the scope of protection of the present disclosure.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which the present disclosure belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure; the terms "including" and "having" and any variations thereof in the specification of the present disclosure and the above-mentioned drawings are intended to cover non-exclusive inclusions.

[0051] In the description of the embodiments of the present disclosure, technical terms such as "first" and "second" are used solely to distinguish between different objects and should not be understood to indicate or imply relative importance or to implicitly specify the quantity, specific order, or primary and secondary relationship of the technical features indicated. In the description of the embodiments of the present disclosure, "plurality" means more than two, unless otherwise specifically defined.

[0052] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present disclosure. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0053] In the description of the embodiments of the present disclosure, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0054] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0055] In the description of the embodiments of the present disclosure, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal connectivity between two components or interaction between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present disclosure based on specific circumstances.

[0056] In the description of the embodiments of the present disclosure, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and can be direct contact, contact through an intermediate medium layer, contact with essentially no interaction force between the two contacting parties, or contact with interaction force between the two contacting parties.

[0057] Hereinafter, the present disclosure will be described in detail.

[0058] With the rapid development of new energy technologies, energy storage devices have become one of the more important research directions in the field of new energy. As a key device in energy storage devices, the heat exchange efficiency and noise issues of heat exchangers have attracted much attention.

[0059] Heat exchangers (heat exchange units) generate a significant amount of heat during operation, impacting heat exchange efficiency. The condenser, located within the housing of the heat exchanger, is the primary heat-generating component. Currently, axial flow fans are used to dissipate the heat generated by the condenser outside the housing. However, due to the concentrated airflow generated by axial flow fans, the airflow through the condenser is less uniform, resulting in excessive noise and poor heat dissipation, leading to low heat exchange efficiency.

[0060] In this regard, the present invention designs a heat exchange device, including: a shell, including an inner cavity and an air inlet and an air outlet connected to the inner cavity; a heat exchange component, including a condenser, the condenser is arranged in the inner cavity and is located between the air inlet and the air outlet; a cross-flow fan, arranged in the inner cavity, the cross-flow fan includes a rotatable cross-flow impeller, and the cross-flow impeller is located between the condenser and the air outlet.

[0061] The heat generated during the operation of the condenser is removed by a cross-flow fan. Compared with an axial flow fan, the airflow passes through the condenser over a larger and more uniform area, thereby improving the heat dissipation effect and the heat exchange efficiency of the condenser and reducing noise.

[0062] The heat exchange device disclosed herein can be used in an energy storage device to exchange heat with batteries within the device. Because the heat exchange efficiency of the heat exchange device is improved and noise is reduced, the heat exchange efficiency with the batteries within the device is also improved, and the noise of the entire device is also reduced.

[0063] The energy storage device disclosed herein can be applied to renewable energy energy storage fields such as electric power storage, photovoltaic energy storage, and wind power storage, and can also be applied to fields such as electric vehicle charging.

[0064] 1 , an energy storage device 1000 may include an energy storage housing 110 and at least one battery 120 housed within the energy storage housing 110. The energy storage device 1000 may also include a heat exchange device 100 for exchanging heat with the battery 120, thereby providing thermal management for the battery 120. The energy storage device 1000 may be an energy storage container or an energy storage cabinet.

[0065] 2 and 3 , the battery 120 mentioned in the embodiment of the present disclosure may be a battery cell 1 .

[0066] The battery cell 1 may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0067] The battery cell 1 can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel metal hydride battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present disclosure.

[0068] A battery cell 1 typically includes an electrode assembly. This assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are inserted and removed between the positive and negative electrodes. The separator, located between the positive and negative electrodes, prevents short circuits between the positive and negative electrodes while allowing the active ions to pass through.

[0069] In some embodiments, the positive electrode may be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0070] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is provided on either or both of the two facing surfaces of the positive electrode current collector.

[0071] As an example, the positive electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, aluminum or stainless steel with a silver surface treatment, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. may be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0072] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds. However, the present disclosure is not limited to these materials, and other traditional materials that can be used as battery positive electrode active materials may also be used. These positive electrode active materials may be used alone or in combination of two or more. Examples of lithium-containing phosphates may include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), a composite material of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO4), a composite material of lithium manganese phosphate and carbon, lithium iron manganese phosphate, and a composite material of lithium iron manganese phosphate and carbon.

[0073] In some embodiments, a positive electrode may be a metal foam. The metal foam may be nickel foam, copper foam, aluminum foam, alloy foam, or carbon foam, among others. When a metal foam is used as the positive electrode, the surface of the metal foam may or may not be provided with a positive electrode active material. For example, a lithium source material, potassium metal, or sodium metal may be filled and / or deposited within the metal foam, where the lithium source material is lithium metal and / or a lithium-rich material.

[0074] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0075] As an example, the negative electrode current collector may be a metal foil, a metal foam, or a composite current collector. For example, as the metal foil, aluminum or stainless steel treated with silver, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, or titanium, etc. may be used. The composite current collector may include a polymer material base layer and a metal layer. The metal foam may be nickel foam, copper foam, aluminum foam, alloy foam, or carbon foam, etc. The composite current collector may be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.). In some embodiments, the material of the positive electrode current collector may be aluminum, and the material of the negative electrode current collector may be copper.

[0076] In some embodiments, the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.

[0077] In some embodiments, the separator is a separator. The present disclosure has no particular limitation on the type of separator, and any known separator with a porous structure having good chemical stability and mechanical stability can be selected.

[0078] As an example, the main material of the isolation membrane can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramics.

[0079] In some embodiments, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transport ions and isolate the positive and negative electrodes.

[0080] In some embodiments, the battery cell 1 further includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. The present disclosure does not specifically limit the type of electrolyte, and the electrolyte may be selected based on needs. The electrolyte may be liquid, gel, or solid.

[0081] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into a wound structure.

[0082] In some embodiments, the electrode assembly is a laminate structure.

[0083] As an example, multiple positive electrode sheets and multiple negative electrode sheets can be provided respectively, and the multiple positive electrode sheets and the multiple negative electrode sheets can be alternately stacked.

[0084] As an example, a plurality of positive electrode sheets may be provided, and the negative electrode sheet may be folded to form a plurality of stacked folded segments, with a positive electrode sheet being sandwiched between adjacent folded segments.

[0085] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form a plurality of folded segments that are stacked.

[0086] As an example, a plurality of separators may be provided, each of which is disposed between any adjacent positive electrode sheets or negative electrode sheets.

[0087] As an example, the separator may be provided continuously, and may be provided between any adjacent positive electrode sheets or negative electrode sheets by folding or winding.

[0088] In some embodiments, the shape of the electrode assembly can be cylindrical, flat, or polygonal.

[0089] In some embodiments, the electrode assembly is provided with tabs that can conduct current from the electrode assembly. The tabs include a positive tab and a negative tab.

[0090] In some embodiments, the battery cell 1 may include a battery housing. The battery housing is used to encapsulate components such as the electrode assembly and electrolyte. The battery housing may be a steel housing, an aluminum housing, a plastic housing (e.g., polypropylene), a composite metal housing (e.g., a copper-aluminum composite housing), or an aluminum-plastic film.

[0091] As an example, the battery cell 1 can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a polygonal battery, and a polygonal battery such as a hexagonal battery, etc. There is no special limitation in the present disclosure.

[0092] In some embodiments, the battery housing includes an end cap and a battery casing. The battery casing has an opening, and the end cap seals the opening to form a sealed space for accommodating materials such as the electrode assembly and electrolyte. The battery casing may have one or more openings. One or more end caps may also be provided.

[0093] In some embodiments, the battery casing is provided with at least one electrode terminal, which is electrically connected to the tab. The electrode terminal may be directly connected to the tab or indirectly connected to the tab via an adapter component. The electrode terminal may be provided on an end cap or on the battery casing.

[0094] In some embodiments, a pressure relief mechanism is provided on the battery housing to release the internal pressure of the battery cell.

[0095] Referring to Figure 3 , the battery 120 described in the embodiments of the present disclosure may be a battery module. A battery module is a single physical module comprising one or more battery cells 1 to provide higher voltage and capacity. When there are multiple battery cells 1, they are connected in series, parallel, or in series combination via a busbar. Multiple battery cells 1 are arranged and fixed to form a battery module.

[0096] 2 , the battery 120 mentioned in the embodiments of the present disclosure may be a battery pack, which includes a battery case and at least one battery cell 1, with the battery cell 1 housed within the battery case. The battery case may include a bottom plate 2, a vertical plate 3, and a cover 4, which is disposed over the bottom plate 1 and vertical plate 3, thereby forming a storage space for the battery cell 1.

[0097] Hereinafter, some embodiments of the present disclosure will be described in detail with reference to FIG. 4 to FIG. 9 .

[0098] An embodiment of the present disclosure provides a heat exchange device 100 , including: a housing 10 , a heat exchange assembly 20 , and a cross-flow blower 30 .

[0099] The shell 10 includes an inner cavity 10a and an air inlet 11 and an air outlet 12 connected to the inner cavity 10a; the heat exchange component 20 (shown in Figure 9) includes a condenser 21, which is arranged in the inner cavity 10a and located between the air inlet 11 and the air outlet 12; the cross-flow fan 30 is arranged in the inner cavity 10a, and the cross-flow fan 30 includes a rotatable cross-flow impeller 31, which is located between the condenser 21 and the air outlet 12.

[0100] The housing 10 defines an interior cavity 10a for accommodating the heat exchange assembly 20 and the crossflow fan 30, and also serves as an air duct connecting the air inlet 11 and the air outlet 12. The air outlet 12 can be completely or partially open on one side of the housing 10. The air inlet 11 can be located on the opposite side of or adjacent to the air outlet 12. For example, referring to FIG. 4 , the housing 10 is in the shape of a rectangular parallelepiped, with the narrower side of the rectangular parallelepiped forming the air outlet 12.

[0101] The condenser 21 is located between the air inlet 11 and the air outlet 12. The condenser 21 may have a windward surface on the windward side and a leeward surface (also called a first surface) on the leeward side. The windward surface is the surface close to the air inlet 11, and the leeward surface is the surface close to the air outlet 12.

[0102] The cross-flow fan 30 is disposed between the condenser 21 and the air outlet 12 , and the cross-flow impeller 31 of the cross-flow fan 30 may face the leeward side of the condenser 21 .

[0103] The cross-flow impeller 31 rotates, driving the air flow from the air inlet 11 into the inner cavity 10a, and flows from the windward side to the leeward side of the condenser 21, and then discharged from the air outlet 12 to the outside of the shell 10, thereby taking away the heat in the inner cavity 10a and cooling the condenser 21.

[0104] The cross-flow fan 30 removes the heat in the inner cavity 10a and cools the condenser 21. Compared with the axial flow fan arranged in the shell 10, the cross-flow fan can form a higher air pressure at a lower speed, so that the air flow passes through the condenser over a larger and more uniform area, reducing wind resistance, thereby improving heat exchange efficiency and reducing noise. In addition, since the cross-flow fan 30 is located in the inner cavity 10a, it can further reduce noise compared with the axial flow fan arranged outside the shell 10.

[0105] In some embodiments, as shown in Figures 4 and 5 , the air outlet 12 is configured as an elongated strip extending along a first direction. The rotation axis O of the crossflow blower 30 extends in the same direction as the first direction. The first direction may be, for example, a vertical direction. The air outlet 12 may be an opening on one side of the housing 10.

[0106] By aligning the extension direction of the rotation axis O of the cross-flow impeller 31 of the cross-flow fan 30 with the length direction of the air outlet 12, the cross-flow fan 30 and the air outlet 12 are more adaptably arranged, so that the air outlet is smoother and more uniform, which is conducive to further reducing noise and improving heat exchange efficiency.

[0107] In the embodiment of the present application, for ease of explanation, the cross-flow blower in FIG. 4 to FIG. 9 only exemplarily shows the structure of the cross-flow impeller 31 and a portion of the blower casing 32 , and other structures of the cross-flow blower are omitted.

[0108] In some embodiments, the cross-flow impeller 31 extends from one end to the other end of the air outlet 12 along the first direction.

[0109] Thus, the cross-flow impeller 31 can cover the long air outlet 12 in the direction of the rotation axis, thereby increasing the air outlet area, further reducing noise, and improving the heat dissipation effect.

[0110] In some embodiments, the cross-flow fan 30 and the condenser 21 are disposed adjacent to the air outlet 12 .

[0111] By arranging the cross-flow fan 30 and the condenser 21 near the air outlet 12 , the air outlet distance is shortened, the air outlet is smoother, and the heat dissipation effect is improved.

[0112] 6-8 , the maximum distance d1 between the rotation axis of the crossflow impeller 31 and one end of the condenser 21 is substantially equal to the maximum distance d2 between the rotation axis of the crossflow impeller 31 and the other end of the condenser 21 .

[0113] The distance between the horizontal lines from the rotation axis of the cross-flow impeller 31 as the starting point to one end of the condenser 21 as the end point is the longest distance. The term "approximately equal" can be understood as equal to or approximately equal to. The rotation axis of the cross-flow impeller 31 is approximately located on the perpendicular bisector of the horizontal line connecting the opposite ends of the condenser 21 (the first end 21a and the second end 21b). The horizontal line connecting the opposite ends of the condenser 21 and the horizontal line connecting the rotation axis of the cross-flow impeller 31 from one end of the condenser 21 (the first end 21a) and the horizontal line connecting the rotation axis of the cross-flow impeller 31 from the other end of the condenser 21 (the second end 21b) form an isosceles triangle.

[0114] 6-8 , in a top view, the distance d1 between the rotation axis of the cross-flow impeller 31 of the cross-flow fan 30 and the horizontal line connecting the first end 21a of the condenser 21 is approximately equal to the distance d2 between the rotation axis of the cross-flow impeller 31 of the cross-flow fan 30 and the horizontal line connecting the second end 21b of the condenser 21.

[0115] The maximum distance between the rotation axis of the through-flow impeller 31 and one end of the condenser 21 is roughly equal to the maximum distance between the rotation axis of the through-flow impeller 31 and the other end of the condenser 21. When the through-flow impeller 31 rotates, the airflow passing through the condenser 21 can cover the entire condenser 21 as evenly as possible, so that the airflow passes through the condenser 21 more evenly, thereby further improving the heat exchange efficiency of the condenser 21 and reducing noise.

[0116] In some embodiments, the closest distance d3 (shown in FIG. 7 ) between the rotation axis of the cross-flow impeller 31 and the condenser 21 is greater than or equal to 10% of the radius R of the cross-flow impeller 31 .

[0117] The appropriate distance between the cross-flow impeller 31 and the condenser 21 helps to force airflow over the entire condenser 21, accelerate heat dissipation, thereby improving heat exchange efficiency and reducing noise.

[0118] In some embodiments, the condenser 21 includes a first surface facing the cross-flow fan 30 , and the first surface includes at least one flat surface or at least one curved surface.

[0119] The condenser 21 has a first surface (leeward surface) facing the cross-flow fan 30 and a windward surface facing away from the cross-flow fan 30. The first surface can be composed of one surface or multiple surfaces. For example, the first surface of the condenser 21 is a plane or an arcuate surface composed of one surface. The arcuate surface can be an arcuate surface convex toward the cross-flow fan 30, or an arcuate surface convex away from the cross-flow fan 30. For another example, the first surface of the condenser 21 is an arcuate surface surrounded by multiple surfaces, and the multiple surfaces can be planes and / or arcuate surfaces. The first arcuate surface can be formed by connecting and splicing multiple condensers to each other, or by bending a single condenser to form the arcuate first surface.

[0120] Fig. 6 exemplarily shows that the first surface of the condenser 21 is a plane. Fig. 7 and Fig. 8 exemplarily show that the first surface of the condenser 21 is an arcuate surface.

[0121] The first surface of the condenser 21 is an arc-shaped surface, which can increase the heat exchange area of ​​the condenser 21 and improve the heat exchange efficiency.

[0122] In some embodiments, a projection of the first surface of the condenser 21 along a second direction on the plane where the air outlet 12 is located at least partially overlaps with the air outlet 12 , and the second direction is perpendicular to the first direction.

[0123] When the first surface of the condenser 21 completely overlaps the air outlet 12, the area of ​​the condenser 21 is substantially equal to the area of ​​the air outlet 12. When the first surface of the condenser 21 partially overlaps the air outlet 12, the area of ​​the condenser 21 may be larger than the area of ​​the air outlet 12.

[0124] For example, referring to Figures 6-8 , the housing 10 is a rectangular parallelepiped having an opening on one side along the second direction, which serves as the air outlet 12. The first surface of the condenser 21 can be perpendicular to the second direction, in which case the first surface of the condenser 21 completely overlaps the air outlet 12. The first surface of the condenser 21 can be inclined relative to the second direction, in which case the first surface of the condenser 21 partially overlaps the air outlet 12.

[0125] The projection of the first surface of the condenser 21 along the second direction on the plane where the air outlet 12 is located at least partially overlaps with the air outlet 12, so that the condenser is at least partially facing the outlet, thereby reducing wind resistance, making the air outlet smoother, and reducing noise.

[0126] In some embodiments, the first surface of the condenser 21 is a plane and is tilted relative to the second direction.

[0127] Compared with a condenser arranged perpendicular to the second direction, a condenser arranged obliquely can increase the heat exchange area, thereby improving the heat exchange efficiency.

[0128] 6 and 7 , in a specific example, the housing 10 is generally in the shape of a rectangular parallelepiped, and the first surface of the condenser 21 intersects with a plane L where the center of the housing 10 lies and is asymmetrical with respect to the plane L where the center of the housing 10 lies. The plane L where the center of the housing 10 lies is a plane extending along the first and second directions and perpendicular to the third direction, and the centerline of the housing 10 extending along the first direction and the centerline extending along the second direction lie within the plane.

[0129] As an example, referring to FIG6 , in a top view, the first surface of condenser 21 is substantially planar and intersects plane L, the center of housing 10, at an acute angle. Specifically, condenser 21 is tilted relative to plane L, the center of housing 10. The rotation axis of crossflow impeller 31 is offset to one side relative to plane L, for example, located at a corner of housing 10 as shown in FIG6 . Compared to a symmetrical configuration perpendicular to plane L, the tilted condenser 21 provides a larger heat exchange area, thereby improving the heat exchange efficiency of heat exchange device 21.

[0130] As another example, referring to FIG7 , in a top view, the first surface of the condenser 21 is roughly an arc surface, and a straight line connecting the two opposite ends of the condenser 21 (the first end 21a and the second end 21b) intersects with the plane L where the center of the shell 10 is located and has an acute angle, so that the first surface of the condenser 21 is asymmetrical with respect to the plane L where the center of the shell is located, and the rotation axis of the cross-flow impeller 31 is biased to one side relative to the plane L where the horizontal center of the shell 10 is located. Compared with a symmetrical configuration, the heat exchange area of ​​the condenser 21 is larger, thereby improving the heat exchange efficiency of the heat exchange device 21. Such an arrangement of the cross-flow impeller 31 and the condenser 21 also helps to increase the heat exchange area while allowing the airflow to be quickly directed out of the shell 10. It should be noted that the condenser 21 shown in FIG7 is asymmetrical with respect to the plane L, but the condenser 21 shown in FIG7 itself can be a symmetrical shape.

[0131] In some embodiments, the first surface of the condenser 21 intersects the plane L where the center of the housing 10 is located and is symmetrical with respect to the plane L where the center of the housing is located.

[0132] As an example, referring to FIG8 , in a top view, the first surface of the condenser 21 is roughly an arc surface, and the horizontal line connecting the two opposite ends of the condenser 21 (the first end 21a and the second end 21b) is perpendicular to the plane L where the horizontal center of the shell 10 is located. The first surface of the condenser 21 is symmetrical about the plane L where the horizontal center of the shell 10 is located, and the rotation axis of the cross-flow impeller 31 is located on the plane L where the horizontal center of the shell 10 is located. Compared with asymmetry, the airflow can pass through the condenser 21 more evenly, thereby contributing to uniform heat exchange and reducing noise.

[0133] By having the first surface of the condenser 21 intersect with the plane L where the center of the shell 10 is located and being symmetrical about the plane L where the center of the shell is located, the uniformity of the airflow passing through the condenser 21 can be improved, thereby facilitating uniform heat exchange and reducing noise.

[0134] In some embodiments, the first surface of the condenser 21 is an arc-shaped surface and partially surrounds the cross-flow impeller 31 .

[0135] The arc-shaped opening of the first surface of the condenser 21 faces the cross-flow impeller 31 , that is, the concave portion of the arc-shaped surface faces the cross-flow impeller 31 .

[0136] By having the first surface being an arc-shaped surface and partially surrounding the cross-flow impeller, the heat exchange area of ​​the airflow passing through the condenser can be increased, thereby further improving the heat exchange efficiency of the condenser and reducing noise.

[0137] In some embodiments, referring to FIG. 7 and FIG. 8 , the first surface of the condenser 21 is an arc surface, and the rotation axis of the cross-flow impeller 31 coincides with the arc center of the arc surface of the condenser 21 .

[0138] In the specific example shown in Figure 8, the first surface of the condenser 21 can be regarded as a section of a cylindrical surface on an imaginary cylindrical surface with a radius r and a center coinciding with the axis of the through-flow impeller 31. In this case, the maximum distance between the rotation axis of the through-flow impeller 31 and one end of the condenser 21 and the maximum distance d2 between the rotation axis of the through-flow impeller 31 and the other end of the condenser 21 are equal or approximately equal.

[0139] The rotation axis of the cross-flow impeller 31 coincides with the arc center of the arc surface of the condenser 21, so that the distance from the rotation axis of the cross-flow impeller 31 to each position of the arc surface of the condenser 21 is the same, thereby further improving the uniformity of the airflow through the condenser 21, improving the heat exchange efficiency of the condenser 21, and reducing noise.

[0140] In some embodiments, referring to Figures 6 to 8, the shell 10 includes a first shell wall and a second shell wall opposite to each other along a third direction, the air outlet 12 is located between the first shell wall and the second shell wall, and the two ends of the condenser 21 are respectively arranged on the first shell wall and the second shell wall, and the third direction is perpendicular to both the first direction and the second direction.

[0141] The two ends of the condenser 21 (the first end 21a and the second end 21b) can respectively abut or adhere to the first and second shell walls, thereby improving the sealing effect between the condenser 21 and the shell 10 and reducing the risk of air leakage. As a result, the airflow in the inner cavity 10a of the shell 10 passes through the condenser 21, reducing the risk of air leakage and improving heat exchange efficiency.

[0142] In some embodiments, the crossflow fan 30 includes a fan housing 32 , and the crossflow impeller 31 is rotatably disposed in the fan housing 32 . The fan housing 32 includes an inner guide surface for guiding the airflow toward the air outlet 12 .

[0143] The fan housing 32 has an air inlet, an air outlet, and an air duct located between the air inlet and the air outlet. A crossflow impeller 31 is rotatably disposed in the air duct. The crossflow impeller 31 can be rotated by a motor fixed to the fan housing 32. The inner guide surface of the fan housing 32 is the surface facing the crossflow impeller 31. The air inlet of the fan housing 32 faces the condenser 21, and the air outlet of the fan housing 32 is connected to the air outlet. For example, the air outlet is located at the air outlet, and the opening size of the air outlet is the same as that of the air outlet.

[0144] The inner guide surface allows air to be discharged more smoothly from the air outlet 12 , thereby reducing wind resistance and noise.

[0145] As an example, the inner guide surface is a curved surface.

[0146] The curved inner guide surface further enables the airflow to be discharged from the air outlet 12 more smoothly, thereby reducing wind resistance and noise.

[0147] In some embodiments, as shown in FIG9 , the heat exchange assembly 20 further includes a compressor 22 , an evaporator 23 , and an expansion valve 24 . The compressor 22 , the condenser 21 , the evaporator 23 , and the expansion valve 24 are sequentially connected via a refrigerant circulation pipeline, thereby forming a refrigerant circulation loop. The refrigerant may be Freon.

[0148] As an example, the evaporator 23 may include two flow channels, one of which serves as a refrigerant flow channel for circulating the refrigerant, and the other serves as a liquid cooling flow channel for communicating with the battery heat exchanger in the energy storage device, thereby exchanging heat with the battery through the battery heat exchanger.

[0149] Through the refrigerant circulation loop, heat can be continuously exchanged for the batteries in the energy storage device, reducing the risk of battery thermal runaway.

[0150] A specific example of the present disclosure is described below.

[0151] An embodiment of the present disclosure provides a heat exchange device, referring to FIG. 4 to FIG. 9 , which includes a housing 10 , a heat exchange assembly 20 and a cross-flow blower 30 .

[0152] The housing 10 has an air inlet 11, an air outlet 12, and an inner cavity 10a connected to the air inlet 11 and the air outlet 12. The inner cavity 10a forms an air duct, and the air outlet 12 is a long strip-shaped opening extending along a first direction on one side of the housing 10. The heat exchange assembly 20 is disposed in the inner cavity 10a and includes a compressor 22, an evaporator 23, an expansion valve 24, and a condenser 21, which are sequentially connected via a refrigerant circulation pipeline. The refrigerant is Freon. The condenser 21 is located between the air inlet 11 and the air outlet 12. The condenser 21 has a windward surface and a first surface. The windward surface is close to the air inlet 11 side, and the first surface is close to the air outlet 12 side. The first surface can be a flat surface or a curved surface. The condenser 21 abuts the housing 10. The crossflow fan 30 is disposed in a cavity near the air outlet 12 in the inner cavity 10a and is located between the condenser 21 and the air outlet 12. The crossflow fan 30 includes a fan housing 32 and a crossflow impeller 31 rotatably disposed in the fan housing 32. The fan housing 32 has an inlet end, an outlet end, and an air cavity located between the inlet end and the outlet end. The crossflow impeller 31 is located in the air cavity. The inlet end of the fan housing 32 faces the first side of the condenser 21, and the outlet end of the fan housing 32 is connected to the air outlet 12. The extension direction of the rotation axis of the crossflow impeller 31 is consistent with the extension direction of the elongated air outlet of the housing 10. The maximum distance between the rotation axis of the crossflow impeller 31 and one end of the condenser 21 is approximately equal to the maximum distance between the rotation axis of the crossflow impeller 31 and the other end of the condenser 21.

[0153] The crossflow fan 30 removes heat from the inner cavity 10a and cools the condenser 21. Compared to an axial flow fan, a crossflow fan can allow airflow to flow through a larger and more uniform area of ​​the condenser, reducing wind resistance, thereby improving heat exchange efficiency and reducing noise. Furthermore, because the crossflow fan 30 is located within the inner cavity 10a, it can further reduce noise compared to an axial flow fan located outside the housing 10. Because the maximum distance between the rotation axis of the crossflow impeller 31 and one end of the condenser 21 is approximately equal to the maximum distance between the rotation axis of the crossflow fan 30 and the other end of the condenser 21, when the crossflow impeller 31 rotates, the airflow can cover the entire condenser 21 as much as possible, thereby allowing the airflow to pass through the condenser 21 more evenly, thereby further improving the heat exchange efficiency of the condenser 21 and reducing noise.

[0154] A second aspect of the present disclosure provides an energy storage device, see Figure 1, comprising: an energy storage box 110, which accommodates at least one battery 120; a heat exchange device 100 as mentioned in any of the above embodiments; and a battery heat exchange element, through which the battery 120 exchanges heat with the heat exchange device 100.

[0155] As an example, the battery heat exchanger includes a liquid circulation line and a circulation pump for driving the liquid circulation within the liquid circulation line. The battery exchanges heat with the heat exchange device through the liquid circulation line. The liquid circulation line can be connected to the liquid cooling flow channel of the evaporator 23, thereby exchanging heat with the evaporator 23. The battery heat exchanger can also include multiple heat exchange plates, each connected in parallel and connected to the liquid circulation line. The battery exchanges heat with the liquid in the liquid circulation line through the heat exchange plates.

[0156] In some embodiments, the heat exchange device 100 is disposed in the energy storage box 10, and the energy storage box 10 is provided with an exhaust port connected to the air outlet 12. The airflow discharged from the air outlet 12 of the heat exchange device 100 is discharged outside the energy storage box 10 through the exhaust port.

[0157] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present disclosure, and they should all be included in the scope of the claims and description of the present disclosure. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present disclosure is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims. Industrial Applicability

[0158] The present disclosure provides a heat exchange device and an energy storage device with high heat exchange efficiency and low noise.

Claims

1. A heat exchange device comprising: a housing, comprising an inner cavity and an air inlet and an air outlet communicated with the inner cavity; a heat exchange assembly, comprising a condenser, the condenser being disposed in the inner cavity and located between the air inlet and the air outlet; A cross-flow fan is arranged in the inner cavity, and the cross-flow fan includes a rotatable cross-flow impeller, and the cross-flow impeller is located between the condenser and the air outlet.

2. The heat exchange device according to claim 1, wherein: The air outlet is configured in an elongated shape extending along a first direction, and the extending direction of the rotation axis of the cross-flow impeller is consistent with the first direction.

3. The heat exchange device according to claim 2, wherein: Along the first direction, the cross-flow impeller extends from one end to the other end of the air outlet.

4. The heat exchange device according to any one of claims 1 to 3, wherein: The cross-flow fan and the condenser are arranged at positions adjacent to the air outlet.

5. The heat exchange device according to any one of claims 1 to 4, wherein: The maximum distance between the rotation axis of the cross-flow impeller and one end of the condenser is substantially equal to the maximum distance between the rotation axis of the cross-flow impeller and the other end of the condenser.

6. The heat exchange device according to claim 5, wherein: The closest distance between the rim of the cross-flow impeller and the condenser is greater than or equal to 10% of the radius of the cross-flow impeller.

7. The heat exchange device according to claim 5, wherein: The condenser includes a first surface facing the cross-flow impeller, and the first surface includes at least one flat surface or at least one arc-shaped surface.

8. The heat exchange device according to claim 7, wherein: A projection of the first surface of the condenser along a second direction on the plane where the air outlet is located at least partially overlaps with the air outlet, and the second direction is perpendicular to the first direction.

9. The heat exchange device according to claim 8, wherein: The first surface is a plane and is tilted relative to the second direction.

10. The heat exchange device according to claim 8, wherein: The first surface is an arc-shaped surface and partially surrounds the cross-flow impeller.

11. The heat exchange device according to claim 10, wherein: The first surface is an arc surface, and the rotation axis of the cross-flow impeller coincides with the arc center of the arc surface.

12. The heat exchange device according to any one of claims 1 to 10, wherein: The shell includes a first shell wall and a second shell wall opposite to each other along a third direction, the air outlet is located between the first shell wall and the second shell wall, and the two ends of the condenser are respectively arranged on the first shell wall and the second shell wall, and the third direction is perpendicular to both the first direction and the second direction.

13. The heat exchange device according to any one of claims 1 to 10, wherein: The crossflow fan comprises a fan housing, and the crossflow impeller is rotatably disposed in the fan housing. The fan housing includes an inner guide surface, and the inner guide surface is used to guide the air flow toward the air outlet side.

14. The heat exchange device according to claim 13, wherein: The inner guide surface includes an arc-shaped guide surface.

15. The heat exchange device according to any one of claims 1 to 14, wherein: The heat exchange component further includes a compressor, an evaporator and an expansion valve. The compressor, the condenser, the evaporator and the expansion valve are connected through a refrigerant circulation pipeline.

16. An energy storage device, wherein: include: An energy storage box, storing at least one battery; The heat exchange device according to any one of claims 1 to 15, used for exchanging heat with the battery.

17. The energy storage device according to claim 16, wherein: The heat exchange device is arranged in the energy storage box, and the energy storage box is provided with an exhaust port communicated with the air outlet.

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