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, in particular to a heat exchange device and an energy storage device. BACKGROUND

[0002] With the rapid development of new energy technology, energy storage devices have become one of the more important research directions in the field of new energy. As an important equipment in energy storage devices, the heat exchange efficiency and noise problem of heat exchange devices have attracted much attention.

[0003] SUMMARY

[0004] 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 implemented by the following technical solutions.

[0006] The first aspect of the present disclosure provides a heat exchange device, a shell comprising an inner cavity and an air inlet and an air outlet communicating with the inner cavity; a heat exchange assembly comprising a condenser, the condenser being arranged in the inner cavity and located between the air inlet and the air outlet; a cross-flow fan arranged in the inner cavity, the cross-flow fan comprising a rotatable cross-flow impeller, the cross-flow impeller being located between the condenser and the air outlet.

[0007] By rotating the cross-flow impeller of the cross-flow fan, the heat in the inner cavity of the shell is taken away, and the condenser is cooled at the same time. Compared with the axial flow fan arranged outside the shell, the cross-flow fan can produce higher air pressure at a lower speed, so that the coverage area of the airflow flowing through the condenser is larger and more uniform, thereby improving the heat exchange efficiency and reducing the noise. In addition, since the cross-flow fan is located in the inner cavity, compared with the axial flow fan arranged outside the shell, the noise can be further reduced.

[0008] In some embodiments, the air outlet is configured in a long strip shape extending along a first direction, and the extension direction of the rotating shaft of the cross-flow fan is consistent with the first direction.

[0009] By making the extension direction of the rotating shaft of the cross-flow fan consistent with the length direction of the air outlet, the cross-flow fan and the air outlet are more suitable, and the air outlet is more smooth, thereby facilitating further reduction of noise and improvement of heat exchange efficiency.

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

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

[0012] In some embodiments, the cross-flow fan and the condenser are disposed adjacent to one side of the air outlet.

[0013] By disposing the cross-flow fan and the condenser adjacent to one side of the air outlet, the air outlet path is shorter, the air outlet is smoother, and the heat dissipation effect is improved.

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

[0015] By disposing the cross-flow fan and the condenser adjacent to one side of the air outlet, the air outlet path is shorter, the air outlet is smoother, and the heat dissipation effect is improved.

[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 air flow over the entire condenser, accelerate heat dissipation, improve heat exchange efficiency, and reduce noise.

[0018] In some embodiments, the condenser includes a first face facing the cross-flow fan, and the first face includes at least one flat face or at least one arc-shaped face.

[0019] The arc-shaped face can increase the heat exchange area of the condenser and improve the heat exchange efficiency.

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

[0021] By overlapping the first face of the condenser with the air outlet, the first face of the condenser faces the outlet, reducing air resistance, making the air outlet smoother, and reducing noise.

[0022] In some embodiments, the first face is flat and is disposed obliquely with respect to the second direction.

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

[0024] In some embodiments, the first face is arc-shaped and partially surrounds the cross-flow impeller.

[0025] In this way, the cross-flow impeller and the condenser are arranged, which helps to increase the heat exchange area and rapidly guide the air flow out of the shell.

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

[0027] The rotation axis of the cross-flow impeller coincides with the center of the circular arc of the condenser, so that the distance from the rotation axis of the cross-flow impeller to each position of the circular arc surface of the condenser is the same, thereby further improving the uniformity of the air flow 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 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 arranged on the first shell wall and the second shell wall, respectively, and the third direction is perpendicular to the first direction and the second direction.

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

[0030] In some embodiments, the cross-flow fan includes a fan shell and a cross-flow impeller rotatably arranged in the fan shell, and the fan shell includes an inner side flow guide surface for guiding the air flow towards the air outlet side.

[0031] The inner side flow guide surface enables the air flow to be discharged more smoothly from the air outlet, reducing air 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, the battery in the energy storage device can be continuously heat-exchanged, reducing the risk of battery thermal runaway.

[0034] The second aspect of the present disclosure provides an energy storage device, including: an energy storage box containing at least one battery; and the heat exchange device of any one of the above embodiments, which is used for heat exchange with the battery.

[0035] In some embodiments, the heat exchange device is arranged in the energy storage box, and the energy storage box is provided with an air outlet communicating with the air outlet.

[0036] The beneficial effects of the embodiments of the present disclosure are as follows:

[0037] The heat exchange device and the energy storage device with high heat exchange efficiency and low noise are provided. BRIEF DESCRIPTION OF DRAWINGS

[0038] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The detailed description is made with reference to the accompanying drawings.

[0039] Fig. 1 is a structural schematic diagram of a heat exchange device according to some embodiments of the present disclosure;

[0040] Fig. 2 is an exploded schematic diagram of a battery pack according to some embodiments of the present disclosure;

[0041] Fig. 3 is a structural schematic diagram of a battery module according to some embodiments of the present disclosure;

[0042] Fig. 4 is an exploded schematic diagram of a heat exchange device according to some embodiments of the present disclosure;

[0043] Fig. 5 is a side view schematic diagram of a heat exchange device according to some embodiments of the present disclosure;

[0044] Fig. 6 is a top view schematic diagram of a heat exchange device according to some embodiments of the present disclosure;

[0045] Fig. 7 is a top view schematic diagram of a heat exchange device according to some other embodiments of the present disclosure;

[0046] Fig. 8 is a top view schematic diagram of a heat exchange device according to some other embodiments of the present disclosure;

[0047] Fig. 9 is a structural diagram of a heat exchange assembly according to some other embodiments of the present disclosure.

[0048] Reference signs: 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-inlet; 12-outlet; 10a-internal cavity; 20-heat exchange assembly; 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 housing; O-rotation axis; L-center of the housing. DETAILED DESCRIPTION

[0049] The embodiments of the technical solutions of the present disclosure will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present disclosure, and therefore only serve as examples, and cannot limit the protection scope of the present disclosure.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure; the use of the terms "including," "comprising," or "having" and variations thereof herein is intended to be broad and encompass the terms "consisting of" and "consisting essentially of" and variations thereof. Unless otherwise noted, the terms "including" and / or "comprising" when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0051] In the description of the embodiments of the disclosure, the technical terms "first", "second", and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the disclosure, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0052] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the disclosure. The occurrence of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to each other. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0053] In the description of the embodiments of the disclosure, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are "or" relationship.

[0054] In the description of the embodiments of the application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the application and simplifying the description, and are not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed in a particular orientation, be operated or used, and therefore cannot be understood as limiting the embodiments of the application.

[0055] In the description of the embodiments of the present disclosure, unless explicitly defined and limited otherwise, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the embodiments of the present disclosure can be understood according to the specific circumstances.

[0056] In the description of the embodiments of the present disclosure, unless explicitly defined and limited otherwise, the technical term "contact" should be understood in a broad sense, which can be direct contact or contact through an intermediate medium layer, and can be contact between two objects in contact without interaction force, or contact between two objects in contact with interaction force.

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

[0058] With the rapid development of new energy technology, energy storage devices have become one of the important research directions in the field of new energy. As an important equipment in energy storage devices, the heat exchange efficiency and noise problem of heat exchange devices are concerned.

[0059] A large amount of heat is generated during the operation of the heat exchange device (heat exchange unit), which affects the heat exchange efficiency. The condenser located in the shell of the heat exchange device is the main heat generating component. At present, the heat generated by the condenser is discharged outside the shell by means of an axial flow fan. Because the airflow generated by the axial flow fan is relatively concentrated, the uniformity of the airflow flowing through the condenser is poor, the noise is too large, the heat dissipation is poor, and the heat exchange efficiency of the condenser is low.

[0060] To this end, the present disclosure designs a heat exchange device, which comprises: a shell comprising an inner cavity, an air inlet and an air outlet communicating with the inner cavity; a heat exchange assembly comprising a condenser, the condenser being arranged in the inner cavity and located between the air inlet and the air outlet; a cross-flow fan arranged in the inner cavity, the cross-flow fan comprising a rotatable cross-flow impeller, the cross-flow impeller being located between the condenser and the air outlet.

[0061] The heat generated during the operation of the condenser is taken away by the cross-flow fan. Compared with the axial flow fan, the area through which the airflow flows through the condenser is larger and more uniform, so that the heat dissipation effect and the heat exchange efficiency of the condenser can be improved, and the noise can be reduced.

[0062] The heat exchange device of the present disclosure can be applied to an energy storage device for heat exchange with the battery in the energy storage device. Since the heat exchange efficiency of the heat exchange device is improved and the noise is reduced, the heat exchange efficiency with the battery in the energy storage device is also improved, and the noise of the entire energy storage device is also reduced.

[0063] The energy storage device of the present disclosure can be applied to the field of renewable energy storage such as power storage, photovoltaic storage, and wind power storage, and can also be applied to the field of electric vehicle charging.

[0064] Referring to FIG. 1, the energy storage device 1000 can include an energy storage cabinet 110 and at least one battery 120 received in the energy storage cabinet 110. The energy storage device 1000 can further include a heat exchange device 100 for heat exchange with the battery 120 to perform thermal management of the battery 120. The energy storage device 1000 can be an energy storage container or an energy storage cabinet.

[0065] Referring to FIGS. 2 and 3, the battery 120 mentioned in the embodiments of the present disclosure can be a battery monomer 1.

[0066] The battery monomer 1 can be a secondary battery, which refers to a battery monomer that can be activated by charging after discharging the battery monomer.

[0067] The battery monomer 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-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiments of the present disclosure are not limited thereto.

[0068] The battery monomer 1 generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During charging and discharging of the battery monomer, active ions (e.g., lithium ions) are inserted and extracted between the positive electrode and the negative electrode. The separator is disposed between the positive electrode and the negative electrode, and can prevent the positive and negative electrodes from short-circuiting while allowing the active ions to pass through.

[0069] In some embodiments, the positive electrode can be a positive electrode sheet, which can 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 opposite in the thickness direction thereof, and the positive electrode active material is disposed on either one or both of the two opposite surfaces of the positive electrode current collector.

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

[0072] As an example, the positive electrode active material can include at least one of lithium-containing phosphates, lithium transition metal oxides, and modified compounds of each thereof. However, the present disclosure is not limited to these materials, and other conventional materials that can be used as a battery positive electrode active material can also be used. These positive electrode active materials can be used alone only one or two or more can be used in combination. Among them, examples of the lithium-containing phosphate can include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (which can also be 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 manganese iron phosphate, and a composite material of lithium manganese iron phosphate and carbon.

[0073] In some embodiments, the positive electrode can employ a foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloy, or foamed carbon, etc. When the foamed metal is used as the positive electrode, the surface of the foamed metal can not be provided with the positive electrode active material, or of course can be provided with the positive electrode active material. As an example, the foamed metal can also be filled or / and deposited with a lithium source material, a potassium metal, or a sodium metal, the lithium source material being lithium metal and / or a lithium-rich material.

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

[0075] As an example, the negative electrode current collector can employ a metal foil, a foamed metal, or a composite current collector. For example, as the metal foil, silver surface-treated aluminum or stainless steel, stainless steel, copper, aluminum, nickel, a carbon electrode, a carbon, nickel, or titanium, etc. can be employed. The composite current collector can include a high molecular material base layer and a metal layer. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloy, or foamed carbon, etc. The composite current collector can be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a high molecular material base material (such as a base material of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.). In some embodiments, the material of the positive electrode current collector can be aluminum, and the material of the negative electrode current collector can 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 film. The present disclosure does not have a particular limitation on the type of the separator film, and any publicly known porous structure separator film having good chemical stability and mechanical stability can be selected.

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

[0079] In some embodiments, the separator is a solid-state electrolyte. The solid-state electrolyte is disposed between the positive electrode and the negative electrode, and functions to transport ions and separate the positive electrode and the negative electrode.

[0080] In some embodiments, the battery cell 1 further includes an electrolyte that functions to conduct ions between the positive electrode and the negative electrode. The type of electrolyte is not particularly limited in the present disclosure, and can be selected as needed. The electrolyte can be liquid, gel, or solid.

[0081] In some embodiments, the electrode assembly is a jelly-roll structure. The positive electrode sheet and the negative electrode sheet are wound to form the jelly-roll structure.

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

[0083] As an example, a plurality of positive electrode sheets and a plurality of negative electrode sheets can be provided, and the plurality of positive electrode sheets and the plurality of negative electrode sheets can be alternately stacked.

[0084] As an example, a plurality of positive electrode sheets can be provided, and the negative electrode sheet can be folded to form a plurality of folded segments that are stacked. One positive electrode sheet can be interposed between adjacent folded segments.

[0085] As an example, a plurality of positive electrode sheets and a plurality of negative electrode sheets can be folded to form a plurality of folded segments that are stacked.

[0086] As an example, a plurality of separators can be provided, and each of the plurality of separators can be interposed between any adjacent positive electrode sheet or negative electrode sheet.

[0087] As an example, a plurality of separators can be provided, and each of the plurality of separators can be interposed between any adjacent positive electrode sheet or negative electrode sheet.

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

[0089] In some embodiments, the electrode assembly can include tabs. The tabs can function to guide current out of the electrode assembly. The tabs can include positive tabs and negative tabs.

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

[0091] As an example, the battery cell 1 can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or another type of battery cell. The prismatic battery cell can include a square battery cell, a blade battery cell, a polygonal battery cell (e.g., a hexagonal battery cell), or the like.

[0092] In some embodiments, the battery housing includes an end cover and a battery casing, the battery casing is provided with an opening, and the end cover closes the opening to form a sealed space for accommodating electrode assemblies, electrolytes and other substances. The battery casing can be provided with one or more openings. The end cover can also be provided with one or more openings.

[0093] In some embodiments, at least one electrode terminal is provided on the battery housing, and the electrode terminal is electrically connected with the tab. The electrode terminal can be directly connected with the tab or indirectly connected with the tab through an adapter component. The electrode terminal can be provided on the end cover or on the battery casing.

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

[0095] Referring to FIG. 3, the battery 120 mentioned in the embodiments of the present disclosure can be a battery module, which includes one or more battery cells 1 to provide a single physical module with higher voltage and capacity. When there are multiple battery cells 1, the multiple battery cells are connected in series, in parallel or in a mixed manner through a busbar component. The multiple battery cells 1 are arranged and fixed to form a battery module.

[0096] Referring to FIG. 2, the battery 120 mentioned in the embodiments of the present disclosure can be a battery pack, which includes a battery box and at least one battery cell 1, and the battery cell 1 is accommodated in the battery box. The battery box can include a bottom plate 2, a standing plate 3 and a cover 4, and the cover 4 is arranged above the bottom plate 1 and the standing plate 3, so that the bottom plate 2, the standing plate 3 and the cover 4 jointly form an accommodation space for accommodating the battery cell 1.

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

[0098] The embodiments of the present disclosure provide a heat exchange device 100, which includes a shell 10, a heat exchange assembly 20 and a cross-flow fan 30.

[0099] The shell 10 includes an inner cavity 10a, an air inlet 11 and an air outlet 12 which communicate with the inner cavity 10a; the heat exchange assembly 20 (shown in FIG. 9) includes a condenser 21, the condenser 21 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, and the cross-flow impeller 31 is located between the condenser 21 and the air outlet 12.

[0100] The inner cavity 10a is formed inside the shell 10 for accommodating the heat exchange assembly 20 and the cross-flow fan 30, and serving 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 shell 10. The air inlet 11 can be located on the opposite side or adjacent side of the air outlet 12. For example, referring to FIG. 4, the shell 10 is in the shape of a cuboid, and the narrower side of the cuboid forms the air outlet 12.

[0101] The condenser 21 is located between the air inlet 11 and the air outlet 12, and can have a windward side with the condenser 21 facing the wind and a leeward side (also referred to as a first side) facing away from the wind. The windward side is the side close to the air inlet 11, and the leeward side is the side close to the air outlet 12.

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

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

[0104] By taking away the heat in the inner cavity 10a and cooling the condenser 21 through the cross-flow fan 30, compared with the axial flow fan arranged outside the shell 10, the cross-flow fan can form a higher air pressure at a lower speed, and the airflow flowing through the condenser has a larger and more uniform area, thereby reducing the air resistance and improving the heat exchange efficiency and reducing the noise. In addition, since the cross-flow fan 30 is located in the inner cavity 10a, compared with the axial flow fan arranged outside the shell 10, the noise can be further reduced.

[0105] In some embodiments, referring to FIGS. 4 and 5, the air outlet 12 is in the shape of a long strip extending along a first direction, and the extension direction of the rotation axis O of the cross-flow impeller 31 is consistent with the first direction. The first direction can be, for example, the up-down direction. The air outlet 12 can be open on one side of the shell 10.

[0106] By making the extension direction of the rotation axis O of the cross-flow impeller 31 of the cross-flow fan 30 consistent with the length direction of the air outlet 12, the cross-flow fan 30 and the air outlet 12 are more adaptively arranged, thereby making the air outlet more smooth and uniform, which is beneficial to further reduce the noise and improve the heat exchange efficiency.

[0107] In the embodiments of the present application, for the convenience of description, the cross-flow fan in FIGS. 4-9 only exemplarily shows the structure of the cross-flow impeller 31 and part of the fan shell 32, and other structures of the cross-flow fan 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] In this way, the cross-flow impeller 31 can cover the long strip-shaped air outlet 12 in the rotation axis direction, increase the air outlet area, further reduce the noise, and improve the heat dissipation effect.

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

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

[0112] In some embodiments, referring to FIGS. 6-8, the farthest distance d1 from the rotation axis of the cross-flow impeller 31 to one end of the condenser 21 is substantially equal to the farthest distance d2 from the rotation axis of the cross-flow impeller 31 to the other end of the condenser 21.

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

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

[0115] By substantially equalizing the farthest distance from the rotation axis of the cross-flow impeller 31 to one end of the condenser 21 and the farthest distance from the rotation axis of the cross-flow impeller 31 to the other end of the condenser 21, when the cross-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 passing through the condenser 21 is more uniform, thereby further improving the heat exchange efficiency of the condenser 21 and reducing the noise.

[0116] In some embodiments, the closest distance d3 (shown in FIG. 7) from the rotation axis of the cross-flow impeller 31 to 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 the air flow to flow against the whole range of the condenser 21, accelerates heat dissipation, thereby improving heat exchange efficiency and reducing noise.

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

[0119] The condenser 21 has a first face (downwind face) facing the cross-flow fan 30 and an upwind face facing away from the cross-flow fan 30, and the first face can be composed of one face or multiple faces. For example, the first face of the condenser 21 is a flat face composed of one face or an arc face, and the arc face can be a convex arc face facing the cross-flow fan 30 or a convex arc face facing away from the cross-flow fan 30. For another example, the first face of the condenser 21 is an arc face composed of multiple faces, and the multiple faces can be flat faces and / or arc faces. The arc-shaped first face can be formed by multiple condensers connected to each other or by one condenser being bent.

[0120] The first face of the condenser 21 is exemplarily shown as a flat face in FIG. 6. The first face of the condenser 21 is exemplarily shown as an arc face in FIG. 7 and FIG. 8.

[0121] The arc-shaped first face of the condenser 21 can increase the heat exchange area of the condenser 21 and improve the heat exchange efficiency.

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

[0123] When the first face of the condenser 21 fully overlaps the air outlet 12, the area of the condenser 21 is approximately equal to the area of the air outlet 12. When the first face of the condenser 21 partially overlaps the air outlet 12, the area of the condenser 21 can be greater than the area of the air outlet 12.

[0124] For example, referring to FIG. 6-FIG. 8, the shell 10 is a cuboid with an opening along the second direction as the air outlet 12, and the first face of the condenser 21 can be perpendicular to the second direction, in which case the first face of the condenser 21 fully overlaps the air outlet 12. The first face of the condenser 21 can be arranged obliquely to the second direction, in which case the first face of the condenser 21 partially overlaps the air outlet 12.

[0125] By making the projection of the first face of the condenser 21 on the plane where the air outlet 12 is located along the second direction at least partially overlap the air outlet 12, the condenser at least partially faces the outlet, thereby reducing air resistance, making the air outlet more smooth, and reducing noise.

[0126] In some embodiments, the first face of the condenser 21 is planar and is arranged obliquely with respect to the second direction.

[0127] The obliquely arranged condenser can increase the heat exchange area compared to the condenser arranged perpendicularly to the second direction, thereby improving the heat exchange efficiency.

[0128] Referring to FIGS. 6 and 7, in one specific example, the shell 10 is generally cuboid-shaped, and the first face of the condenser 21 intersects the plane L where the center of the shell 10 is located and is asymmetric with respect to the plane L where the center of the shell 10 is located. The plane L where the center of the shell 10 is located is a plane extending along the first direction and the second direction and being perpendicular to the third direction, and the center line of the shell 10 extending along the first direction and the center line of the shell 10 extending along the second direction are located in the plane.

[0129] As an example, referring to FIG. 6, in a top view, the first face of the condenser 21 is generally planar, intersects the plane L where the center of the shell 10 is located, and has an acute angle with respect to the plane L where the center of the shell 10 is located, i.e., is arranged obliquely with respect to the plane L where the center of the shell 10 is located, and the rotation axis of the cross-flow impeller 31 is deviated to one side with respect to the plane L where the center of the shell 10 is located, e.g., is located at a corner position of the shell 10 as shown in FIG. 6. The obliquely arranged condenser 21 has a larger heat exchange area than a shape symmetric with respect to the plane L where the center of the shell 10 is located, thereby improving the heat exchange efficiency of the heat exchange device 21.

[0130] As another example, referring to FIG. 7, in a top view, the first face of the condenser 21 is generally arc-shaped, and the straight line connecting the opposite ends (the first end 21a and the second end 21b) of the condenser 21 intersects the plane L where the center of the shell 10 is located and has an acute angle, so that the first face of the condenser 21 is asymmetric with respect to the plane L where the center of the shell 10 is located, and the rotation axis of the cross-flow impeller 31 is deviated to one side with respect to the plane L where the horizontal center of the shell 10 is located. Compared to the symmetric shape, the condenser 21 has a larger heat exchange area, thereby improving the heat exchange efficiency of the heat exchange device 21. Arranging the cross-flow impeller 31 and the condenser 21 in this way also helps to rapidly guide the airflow out of the shell 10 while increasing the heat exchange area. It should be noted that the condenser 21 shown in FIG. 7 is asymmetric with respect to the plane L, but the condenser 21 shown in FIG. 7 itself can be a symmetric shape.

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

[0132] As an example, referring to FIG. 8, in a top view, the first face of the condenser 21 is substantially an arc face, the line connecting the opposite ends (the first end 21a and the second end 21b) of the condenser 21 is perpendicular to the plane L where the horizontal center of the shell 10 is located, and the first face of the condenser 21 is symmetric about the plane L where the horizontal center of the shell 10 is located. 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 the asymmetric structure, the air flow can pass through the condenser 21 more uniformly, thereby facilitating uniform heat exchange and reducing noise.

[0133] By intersecting the first face of the condenser 21 with the plane L where the center of the shell 10 is located and being symmetric about the plane L where the center of the shell is located, the uniformity of the air flow passing through the condenser 21 can be improved, thereby facilitating uniform heat exchange and reducing noise.

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

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

[0136] By making the first face an arc face and partially surrounding the cross-flow impeller, the heat exchange area of the air flow passing through the condenser can be improved, 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 face of the condenser 21 is a circular arc face, and the rotation axis of the cross-flow impeller 31 coincides with the center of the circular arc face of the condenser 21.

[0138] In the specific example shown in FIG. 8, the first face of the condenser 21 can be regarded as a section of the cylindrical surface on the imaginary cylinder surface with the center coinciding with the axis of the cross-flow impeller 31 and the radius r. In this case, the farthest distance d2 between the rotation axis of the cross-flow impeller 31 and one end of the condenser 21 is equal to or substantially equal to the farthest distance between the rotation axis of the cross-flow impeller 31 and the other end of the condenser 21.

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

[0140] In some embodiments, referring to FIG. 6 to FIG. 8, the shell 10 includes a first shell wall and a second shell wall opposite 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 arranged on the first shell wall and the second shell wall, respectively. The third direction is perpendicular to the first direction and the second direction.

[0141] The two ends (the first end 21a and the second end 21b) of the condenser 21 can be respectively abutted against or bonded to the first shell wall and the second shell wall, so as to improve the sealing effect between the condenser 21 and the shell 10 and reduce the risk of air leakage. In this way, the airflow in the inner cavity 10a of the shell 10 passes through the condenser 21, so as to reduce the risk of air leakage and improve the heat exchange efficiency.

[0142] In some embodiments, the cross-flow fan 30 includes a fan shell 32, and the cross-flow impeller 31 is rotatably arranged in the fan shell 32. The fan shell 32 includes an inner side flow guide surface for guiding the airflow to the air outlet 12 side.

[0143] The fan shell 32 has an air inlet, an air outlet, and an air duct between the air inlet and the air outlet. The cross-flow impeller 31 is rotatably arranged in the air duct and can be driven to rotate by a motor fixed on the fan shell 32. The inner side flow guide surface of the fan shell 32 is the surface facing the cross-flow impeller 31. The air inlet of the fan shell 32 faces the condenser 21, and the air outlet of the fan shell 32 communicates with the air outlet, for example, the air outlet is located at the air outlet, and the opening size of the air outlet is consistent with that of the air outlet.

[0144] The inner side flow guide surface can make the airflow more smoothly discharged from the air outlet 12, reduce the air resistance, and reduce the noise.

[0145] As an example, the inner side flow guide surface is an arc surface.

[0146] The arc-shaped inner side flow guide surface further makes the airflow more smoothly discharged from the air outlet 12, reduces the air resistance, and reduces the noise.

[0147] In some embodiments, referring to FIG. 9, 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 communicated through a refrigerant circulation pipeline, so as to form a refrigerant circulation loop. The refrigerant can be freon.

[0148] As an example, the evaporator 23 can include two flow channels, one of which is used as a refrigerant flow channel for circulating the refrigerant, and the other of which is used as a liquid cooling flow channel for communicating with the battery heat exchange member in the energy storage device, so as to exchange heat with the battery through the battery heat exchange member.

[0149] Through the refrigerant circulation loop, the battery in the energy storage device can be continuously heat-exchanged, so as to reduce the risk of battery thermal runaway.

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

[0151] The heat exchange device provided by the embodiments of the present disclosure includes a shell 10, a heat exchange assembly 20, and a cross-flow fan 30, as shown in FIGS. 4-9.

[0152] The shell 10 has an air inlet 11, an air outlet 12, and an inner cavity 10a in communication with the air inlet 11 and the air outlet 12, the inner cavity 10a forms an air duct, the air outlet 12 is a long strip-shaped opening on one side of the shell 10 extending along a first direction. The heat exchange assembly 20 is arranged in the inner cavity 10a and includes a compressor 22, an evaporator 23, an expansion valve 24, and a condenser 21 connected in sequence by a refrigerant circulation pipeline, wherein the refrigerant is freon. The condenser 21 is located between the air inlet 11 and the air outlet 12, and the condenser 21 has a windward surface and a first surface, the windward surface is close to the side of the air inlet 11, and the first surface is close to the side of the air outlet 12, and the first surface can be a plane or an arc surface. The condenser 21 is in abutment with the shell 10. The cross-flow fan 30 is arranged in the cavity close to the air outlet 12 side in the inner cavity 10a and located between the condenser 21 and the air outlet 12, and the cross-flow fan 30 includes a fan shell 32 and a cross-flow impeller 31 rotatably arranged in the fan shell 32, the fan shell 32 has an inlet end, an outlet end, and a wind cavity located between the inlet end and the outlet end, and the cross-flow impeller 31 is located in the wind cavity. The inlet end of the fan shell 32 faces the first surface of the condenser 21, and the outlet end of the fan shell 32 is in communication with the air outlet 12. The extension direction of the rotating shaft of the cross-flow impeller 31 is consistent with the extension direction of the long strip-shaped air outlet of the shell 10. The farthest distance between the rotating shaft center of the cross-flow impeller 31 and one end of the condenser 21 is approximately equal to the farthest distance between the rotating shaft center of the cross-flow fan 30 and the other end of the condenser 21.

[0153] The cross-flow fan 30 can take away the heat in the inner cavity 10a and cool the condenser 21, compared with the axial flow fan, the cross-flow fan can make the airflow flow through the condenser in a larger and more uniform area, reduce the wind resistance, thus improve the heat exchange efficiency and reduce the noise, in addition, since the cross-flow fan 30 is located in the inner cavity 10a, compared with the axial flow fan arranged outside the shell 10, the noise can be further reduced. By making the farthest distance between the rotating shaft center of the cross-flow impeller 31 and one end of the condenser 21 approximately equal to the farthest distance between the rotating shaft center of the cross-flow fan 30 and the other end of the condenser 21, when the cross-flow impeller 31 rotates, the airflow can cover the entire condenser 21 as much as possible, so that the airflow passes through the condenser 21 more uniformly, thereby further improving the heat exchange efficiency of the condenser 21 and reducing the noise.

[0154] The second aspect of the present disclosure provides an energy storage device, referring to FIG. 1, comprising: an energy storage box 110 containing at least one battery 120; a heat exchange device 100 as mentioned in any of the above embodiments; a battery heat exchange piece, the battery 120 exchanges heat with the heat exchange device 100 through the battery heat exchange piece.

[0155] As an example, the battery heat exchange member includes a liquid circulation pipeline and a circulation pump for driving liquid circulation in the liquid circulation pipeline, and the battery exchanges heat with the heat exchange device through the liquid circulation pipeline. The liquid circulation pipeline can be in communication with the liquid cooling channel of the evaporator 23, thereby exchanging heat with the evaporator 23. The battery heat exchange member can further include a plurality of heat exchange plates, each of which is in parallel with each other and in communication with the liquid circulation pipeline, and the battery exchanges heat with the liquid in the liquid circulation pipeline through the heat exchange plates.

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

[0157] The above embodiments are only used to illustrate the technical solutions of the present disclosure, but not to limit them; although the present disclosure has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the above embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present disclosure, and they should be covered in the scope of the claims and the specification of the present disclosure. In particular, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present disclosure is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims. Industrial applicability

[0158] Through the present disclosure, a heat exchange device and an energy storage device with high heat exchange efficiency and low noise are provided.

Claims

1. A heat exchange device, comprising: a housing comprising an inner cavity, an air inlet and an air outlet communicating 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; and a cross-flow fan disposed in the inner cavity, the cross-flow fan comprising a rotatable cross-flow impeller, the cross-flow impeller being located between the condenser and the air outlet. 2.The heat exchange device according to claim 1, wherein the air outlet is configured in a long strip shape extending along a first direction, and an extending direction of a 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 of the air outlet to the other end. 4.The heat exchange device according to any one of claims 1-3, wherein the cross-flow fan and the condenser are disposed adjacent to the air outlet. 5.The heat exchange device according to any one of claims 1-4, wherein a farthest distance between a rotation center of the cross-flow impeller and one end of the condenser is substantially equal to a farthest distance between the rotation center of the cross-flow impeller and the other end of the condenser. 6.The heat exchange device according to claim 5, wherein a nearest distance between a rim of the cross-flow impeller and the condenser is greater than or equal to 10% of a radius of the cross-flow impeller. 7.The heat exchange device according to claim 5, wherein the condenser comprises a first face facing the cross-flow impeller, the first face comprising at least one flat face or at least one arc face. 8.The heat exchange device according to claim 7, wherein a projection of the first face of the condenser on a plane where the air outlet is located along a second direction is at least partially overlapped with the air outlet, the second direction being perpendicular to the first direction. 9.The heat exchange device according to claim 8, wherein the first face is flat and is disposed obliquely relative to the second direction. 10.The heat exchange device according to claim 8, wherein the first face is arc-shaped and partially encloses the cross-flow impeller. 11.The heat exchange device according to claim 10, wherein the first face is a circular arc face, and a rotation center of the cross-flow impeller coincides with a center of a circular arc of the circular arc face. 12.The heat exchange device according to any one of claims 1-10, wherein the housing comprises a first housing wall and a second housing wall opposite along a third direction, the air outlet is located between the first housing wall and the second housing wall, and two ends of the condenser are disposed on the first housing wall and the second housing wall respectively, the third direction being perpendicular to the first direction and the second direction. 13.The heat exchange device according to any one of claims 1-10, wherein the cross-flow fan comprises a fan housing, and the cross-flow impeller is rotatably disposed in the fan housing, and the fan housing comprises an inner side flow guide face for guiding air flow toward the air outlet side. 14.The heat exchange device according to claim 13, wherein the inner side flow guide face comprises an arc-shaped flow guide face. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 15. The heat exchange device according to any one of claims 1-14, wherein, the heat exchange assembly further comprises a compressor, a condenser, an evaporator and an expansion valve, the compressor, the condenser, the evaporator and the expansion valve being communicated by a refrigerant circulation pipeline.

16. An energy storage device, wherein, comprises: an energy storage box containing at least one battery; the heat exchange device according to any one of claims 1-15, 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 air outlet communicated with the air outlet.

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