Heat exchange device for energy storage device, and energy storage device

Abstract

The present disclosure discloses a heat exchange device for an energy storage device, and an energy storage device. The heat exchange device comprises: a housing, comprising an inner cavity, and an air inlet and an air outlet in communication with the inner cavity; a heat exchange assembly, comprising an evaporator and at least one condenser arranged in the inner cavity, wherein the condenser is located between the air inlet and the air outlet, and the condenser is closer to the air outlet side than the evaporator; and a plurality of cross-flow fans, wherein each cross-flow fan comprises a rotatable cross-flow impeller, each cross-flow impeller is located in the inner cavity and between the condenser and the air outlet, and the plurality of cross-flow fans are arranged such that the axial directions of rotating shafts of the cross-flow impellers are aligned.

Description

Heat exchange device for energy storage device and energy storage device

[0001] Cross-reference to related applications

[0002] The present disclosure is based on a Chinese patent application No. 202411102986.3, filed on August 12, 2024, entitled "Heat exchange device for energy storage device and energy storage device", and claims priority to the Chinese patent application, the entire contents of which are hereby incorporated by reference into the present disclosure. TECHNICAL FIELD

[0003] The present disclosure relates to the field of new energy technology, in particular to a heat exchange device for an energy storage device and an energy storage device. BACKGROUND

[0004] 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 the heat exchange device for energy storage devices are of great concern. SUMMARY

[0005] To solve the above technical problems, the present disclosure provides a heat exchange device for an energy storage device with high heat exchange efficiency and low noise.

[0006] The present disclosure is achieved by the following technical solutions.

[0007] The first aspect of the present disclosure provides a heat exchange device for an energy storage device, comprising: a shell comprising an inner cavity, an air inlet and an air outlet communicating with the inner cavity; a heat exchange assembly comprising an evaporator and at least one condenser, the evaporator and the condenser being arranged in the inner cavity, the condenser being located between the air inlet and the air outlet, the condenser being closer to the air outlet side than the evaporator; a plurality of cross-flow fans, each cross-flow fan comprising a plurality of cross-flow impellers rotatable, each cross-flow impeller being located in the inner cavity and between the condenser and the air outlet, the plurality of cross-flow fans being arranged and the axis directions of the rotation shafts of each cross-flow impeller being consistent.

[0008] By arranging the plurality of cross-flow fans and making the axis directions of the rotation shafts of the cross-flow impellers of each cross-flow fan consistent, the probability of mutual interference between air flows is lower, so that the air flows can flow more uniformly and stably through the condenser, and the air volume flowing through the condenser can be improved, thereby continuously and efficiently taking away more heat from the condenser, improving the heat exchange efficiency of the condenser. In addition, the cross-flow fan has more uniform air outlet than the axial flow fan, thereby also reducing noise.

[0009] In some embodiments, among the plurality of cross-flow fans, at least two cross-flow fans are arranged along the axis direction in a cross-flow impeller coaxial manner, and the axis direction is parallel to the plane where the air outlet is located.

[0010] Among the plurality of cross-flow fans, at least two cross-flow fans are arranged in a coaxial manner along the axial direction with the cross-flow impellers, and the axial direction is parallel to the plane where the air outlet is located. The number of cross-flow fans arranged in a coaxial manner can be flexibly adapted according to the size of the air outlet, so as to help achieve a better air outlet effect and reduce noise in a limited air outlet size range.

[0011] In some embodiments, among the plurality of cross-flow fans, at least two cross-flow fans are arranged in a side-by-side manner along a first direction with the cross-flow impellers, and the first direction is perpendicular to the axial direction and parallel to the plane where the air outlet is located.

[0012] In this way, the number of cross-flow fans can be flexibly adapted according to the size of the air outlet along the first direction, so as to help achieve a better air outlet effect and reduce noise.

[0013] In some embodiments, among the plurality of cross-flow fans, at least two cross-flow fans are arranged in a side-by-side manner along a first direction with the cross-flow impellers, and the first direction is perpendicular to the axial direction and parallel to the plane where the air outlet is located.

[0014] Among the plurality of cross-flow fans, at least two cross-flow fans are arranged in a side-by-side manner along a first direction with the cross-flow impellers, and the first direction is perpendicular to the axial direction and parallel to the plane where the air outlet is located. The number of cross-flow fans can be flexibly adapted according to the size of the air outlet along the first direction, so as to help achieve a better air outlet effect and reduce noise.

[0015] In some embodiments, the air outlet is in the shape of a long strip, and the axial direction is consistent with the length direction of the air outlet.

[0016] The extension direction of the cross-flow impellers of the plurality of cross-flow fans is consistent with the opening extension direction of the air outlet, which can increase the air outlet area and reduce noise.

[0017] In some embodiments, each cross-flow fan includes a fan shell, each fan shell contains a respective cross-flow impeller, and an airflow passage is formed between the fan shell and the cross-flow impeller, and each airflow passage is independent of the others.

[0018] By making each airflow passage independent of the others, the airflow flows in the respective airflow passages without interference between them, so that the airflow can be stably and uniformly discharged, thereby reducing noise. In addition, the independence of each airflow passage also facilitates the control of the direction, speed and flow of each airflow, so that the distribution of the airflow can be flexibly adjusted according to actual needs to achieve the best air outlet effect. Furthermore, it is also convenient for the maintenance and replacement of the cross-flow fans.

[0019] In some embodiments, the plurality of cross-flow fans includes a pair of cross-flow fans arranged along the first direction, each cross-flow fan of the pair of cross-flow fans includes a fan shell accommodating a cross-flow impeller, an airflow passage is formed between the fan shell and the cross-flow impeller, each airflow passage is independent of each other, the fan shell has an inner side flow guide surface on a side facing the airflow passage, the cross-flow impeller and the inner side flow guide surface of one cross-flow fan of the pair of cross-flow fans are mirror-imaged with the cross-flow impeller and the inner side flow guide surface of the other cross-flow fan.

[0020] The mirror-imaged cross-flow impeller and the inner side flow guide surface of the two cross-flow fans make the airflow distribution at the outlet of each airflow passage more uniform, and reduce noise.

[0021] In some embodiments, the inner side flow guide surface includes a first flow guide surface and a second flow guide surface, the first flow guide surface includes an arc-shaped flow guide surface, and the second flow guide surface includes an inclined flow guide surface, the inclined flow guide surface is configured to be closer to the first flow guide surface as it is closer to the outlet.

[0022] The arc-shaped flow guide surface and the inclined flow guide surface can make the airflow more smoothly guided to the outlet, thereby reducing wind resistance and further reducing noise.

[0023] In some embodiments, the condenser includes a windward surface and a leeward surface, the leeward surface faces the cross-flow impeller, and at least the leeward surface is configured to be farther away from the outlet as it is closer to a middle surface, the middle surface is an imaginary plane that vertically bisects the outlet.

[0024] By configuring the leeward surface of the condenser to be farther away from the outlet as it is closer to the middle surface, the leeward surface partially surrounds the cross-flow fan, which can increase the area of the airflow passing through the condenser, improve the heat exchange efficiency of the condenser, and also reduce the space occupation in the inner cavity of the shell, which helps to improve the space utilization.

[0025] In some embodiments, the leeward surface of the condenser is symmetric about the middle surface.

[0026] In this way, the airflow can pass through the condenser more uniformly, thereby improving the heat exchange efficiency, and the airflow can flow to the outlet more uniformly, so that the air outlet is more uniform, thereby reducing noise.

[0027] In some embodiments, at least the leeward surface of the windward surface and the leeward surface includes a circular arc surface or an inclined surface inclined relative to the middle surface.

[0028] By configuring the leeward surface of the condenser to include a circular arc surface or an inclined surface inclined relative to the middle surface, the surface area of the condenser can be increased, thereby improving the heat exchange efficiency.

[0029] In some embodiments, the heat exchange assembly comprises two condensers, the leeward surface of each condenser is formed as an inclined surface, and the two condensers are connected at one end close to each other.

[0030] The two condensers with inclined leeward surfaces are connected to form a condenser combination with increased surface area, which can improve the heat exchange efficiency without changing the structure of each condenser and reducing the manufacturing cost.

[0031] In some embodiments, the heat exchange assembly comprises one condenser, and the leeward surface of the condenser is formed as an arc surface or an inclined surface.

[0032] The leeward surface of the condenser is formed as an arc surface or an inclined surface, which can increase the surface area of the condenser, thereby improving the heat exchange efficiency, and can also reduce the risk of air leakage caused by poor sealing of the connection of multiple condensers, thereby reducing air flow loss and further improving the heat exchange efficiency.

[0033] In some embodiments, the air flow passage comprises an inlet and an outlet, and the inlets of the cross-flow fans do not overlap with each other along the projection of the leeward surface of the condenser in the second direction perpendicular to the axial direction.

[0034] The air flow generated by each cross-flow fan passes through different positions of the condenser, which can increase the heat exchange area between the air flow and the condenser, thereby carrying away more heat from the condenser and improving the heat exchange efficiency.

[0035] In some embodiments, the heat exchange assembly comprises two or more connected condensers, and the condensers are arranged along the first direction, the projection of the inlet of each cross-flow fan corresponds to the leeward surface of each condenser, and the first direction is perpendicular to the second direction and the axial direction.

[0036] The projection of the inlet of each cross-flow fan along the second direction Z on the leeward surface of the condenser corresponds to the leeward surface of each condenser, so that the air flow generated by each cross-flow fan passes through different condensers, thereby carrying away heat from each condenser and improving the heat exchange efficiency of each condenser.

[0037] In some embodiments, the distance between the rim of the cross-flow impeller and the leeward surface of the condenser is greater than or equal to 5mm.

[0038] The appropriate distance between the cross-flow impeller and the condenser can provide a gap for the smooth flow of air flow and improve the passing efficiency of the air flow through the condenser.

[0039] In some embodiments, the cross-flow fan and the condenser are arranged adjacent to the air outlet.

[0040] In this way, the air outlet distance can be shorter, the air outlet can be smoother, and more space can be provided for the arrangement of other components.

[0041] In some embodiments, the shell comprises a first shell wall and a second shell wall opposite along the first direction, the air outlet is located between the first shell wall and the second shell wall, and the condenser is connected to the first shell wall and the second shell wall at two ends along the second direction, respectively.

[0042] Thus, the air flow loss can be reduced, so that more air flow passes through the condenser, and the heat exchange efficiency is improved.

[0043] In some embodiments, along the second direction, a sealing member is arranged between one end of the condenser and the first shell wall and between the other end of the condenser and the second shell wall, respectively.

[0044] Thus, the air leakage risk can be reduced, and the heat exchange efficiency is improved.

[0045] In some embodiments, the heat exchange assembly further comprises a compressor, an evaporator, and an expansion valve, and the compressor, the condenser, the evaporator, and the expansion valve are communicated through a refrigerant circulation pipeline.

[0046] Since the air flow generated by the rotation of the cross-flow impeller can uniformly take away the heat generated by the operation of the condenser, the heat exchange assembly can continuously and efficiently exchange heat with the battery in the energy storage device, thereby improving the battery operation performance.

[0047] The second aspect of the present disclosure provides an energy storage device, comprising: an energy storage box containing at least one battery device; and the heat exchange device of any one of the above embodiments, the heat exchange device being used to exchange heat with the battery device.

[0048] 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 communicated with the air inlet and an air inlet communicated with the air outlet.

[0049] Inventive effect: through the present disclosure, the noise of the heat exchange device can be reduced, and the heat exchange efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0050] 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 drawings are for purposes of illustration only and are not considered a limitation of the present disclosure. Moreover, like reference numerals are used to designate identical parts throughout the entire drawings. In the drawings:

[0051] FIG. 1 is a structural schematic view of a heat exchange device provided by some embodiments of the present disclosure;

[0052] FIG. 2 is an exploded schematic view of a battery device provided by some embodiments of the present disclosure;

[0053] FIG. 3 is a structural schematic view of a battery monomer assembly provided by some embodiments of the present disclosure;

[0054] Fig. 4 is a schematic diagram of a housing of a heat exchange device according to some embodiments of the present disclosure;

[0055] Fig. 5 is a schematic diagram of a side view of a heat exchange device according to some embodiments of the present disclosure, in which the housing of the cross-flow fan is omitted;

[0056] Fig. 6 is a schematic diagram of an internal structure of a heat exchange device according to some embodiments of the present disclosure, viewed from a top perspective;

[0057] Fig. 7 is a schematic diagram of an internal structure of a heat exchange device according to some other embodiments of the present disclosure, viewed from a top perspective;

[0058] Fig. 8 is a schematic diagram of a side view of a heat exchange device according to some other embodiments of the present disclosure, in which the housing of the cross-flow fan is omitted;

[0059] Fig. 9 is a schematic diagram of an internal structure of a heat exchange device according to some further embodiments of the present disclosure, viewed from a top perspective;

[0060] Fig. 10 is a schematic diagram of an internal structure of a heat exchange device according to some still further embodiments of the present disclosure, viewed from a top perspective;

[0061] Fig. 11 is a schematic diagram of a heat exchange assembly according to some embodiments of the present disclosure;

[0062] Fig. 12 is a schematic diagram of a heat exchange assembly and a battery device exchanging heat via a heat management assembly according to some embodiments of the present disclosure.

[0063] BRIEF DESCRIPTION OF DRAWINGS 1000 - energy storage device; 110 - energy storage box; 120 - battery device; 1 - battery cell; 2 - first box body; 3 - second box body; 111 - air outlet; 112 - air inlet; 100 - heat exchange device; 10 - housing; 11 - air inlet; 12 - air outlet; 10a - inner cavity; 101 - first housing wall; 102 - second housing wall; 103 - top wall; 104 - bottom wall; 20 - heat exchange assembly; 21 - condenser; 21a - leeward face; 21b - windward face; 211 - first circular arc portion; 212 - second circular arc portion; 22 - compressor; 23 - evaporator; 24 - expansion valve; 30 - cross-flow fan; 31 - cross-flow impeller; 32 - fan housing; 32a - air flow passage; 32b - flow guide face; 32b-1 - first flow guide face; 32b-2 - first flow guide face; 131 - heat exchange medium circulation pipeline; 132 - circulation pump; 133 - liquid cooling plate. DETAILED DESCRIPTION

[0064] 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.

[0065] 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 "comprising" are open-ended and do not exclude the presence of unrecited elements or limitations.

[0066] In the description of the embodiments of the disclosure, the technical terms "first", "second", "third" 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.

[0067] 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 appearance 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. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0068] 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 " / " herein generally represents an "or" relationship between the associated objects before and after it.

[0069] In the description of the embodiments of the disclosure, 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 disclosure and simplifying the description, and do not 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 disclosure.

[0070] 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.

[0071] 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.

[0072] Next, the present disclosure will be described in detail.

[0073] 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 part of energy storage devices, the heat exchange efficiency and noise problem of heat exchange devices are of great concern.

[0074] A large amount of heat is generated during the operation of the heat exchange device (heat exchange unit), which affects the heat exchange efficiency. Among them, the condenser located in the shell of the heat exchange device is the main heat generating component. At present, the airflow generated by the operation of the axial flow fan carries away the heat of the condenser. However, due to the concentration of the airflow generated by the operation of the axial flow fan, the uniformity of the air outlet is poor, resulting in excessive noise, and the airflow can only carry away part of the heat of the condenser, resulting in poor heat exchange efficiency of the condenser.

[0075] Based on such a design concept, the present disclosure provides a heat exchange device, comprising: a shell comprising an inner cavity, and an air inlet and an air outlet communicating with the inner cavity; a heat exchange assembly comprising an evaporator and at least one condenser, the evaporator and the condenser being arranged in the inner cavity, and the condenser being located between the air inlet and the air outlet; the condenser is closer to the air outlet side than the evaporator; a plurality of cross-flow fans, each cross-flow fan comprising a rotatable cross-flow impeller, each cross-flow impeller being located in the inner cavity and between the condenser and the air outlet, the plurality of cross-flow fans being arranged and the axis directions of the rotating shafts of each cross-flow impeller being consistent.

[0076] By arranging multiple cross-flow fans and making the axis directions of the rotating shafts of the cross-flow impellers of the cross-flow fans consistent, the probability of mutual interference between air flows is reduced, so that the air flows through the condenser more uniformly and stably, and the air volume flowing through the condenser can be improved, thereby continuously and efficiently taking away more heat of the condenser, improving the heat exchange efficiency of the condenser. In addition, the cross-flow fan has more uniform air outlet than the axial flow fan, thereby also reducing noise.

[0077] The heat exchange device of the present disclosure can be applied to an energy storage device, and can be used for heat exchange with a battery device in the energy storage device.

[0078] In the embodiments of the present disclosure, the energy storage device includes one or more battery clusters to improve the voltage and capacity of the energy storage device. The battery cluster can include a plurality of battery devices connected in series through a busbar component to improve the voltage of the energy storage device. When the energy storage device includes a plurality of battery clusters, the plurality of battery clusters are connected in parallel to improve the capacity of the energy storage device.

[0079] The energy storage device can be used in an energy storage power station, a wind power generation system, a solar power generation system, a mobile power system, or a temporary power supply system, etc. The energy storage device can store electrical energy as needed and output electrical energy at an appropriate time. For example, the energy storage device can store electrical energy during the off-peak period of electricity consumption, and provide electrical energy for related users or electrical equipment during the peak period of electricity consumption. The energy storage system provided in the embodiments of the present disclosure can be any power system that needs to use an energy storage device.

[0080] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0081] In some embodiments, the energy storage device can include a cabinet body and one or more battery clusters, and the battery clusters are accommodated in the cabinet body.

[0082] In some embodiments, referring to FIG. 1, the energy storage device 1000 can include an energy storage box (cabinet body) 110 and at least one battery device 120 accommodated in the energy storage box 110. The energy storage device 1000 can further include a heat exchange device 100, which can be used for heat exchange with the battery device 120, so as to perform thermal management on the battery device 120, such as heating or cooling the battery device 120, thereby improving the performance of the battery device 120 and reducing the risk of thermal runaway of the battery device 120.

[0083] Referring to FIGS. 2 and 3, the battery apparatus mentioned in the embodiments of the disclosure can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells 1 connected in series, in parallel, or in a mixed connection through a busbar.

[0084] In some embodiments, the battery cell assembly is generally formed of a plurality of battery cells arranged.

[0085] As an example, the battery cell assembly can be a battery module formed of a plurality of battery cells arranged and fixed as one independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.

[0086] In some embodiments, the battery apparatus can be a battery pack including a case and one or more battery cell assemblies accommodated in the case.

[0087] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be accommodated in the case by fixing the battery module in the case.

[0088] As an example, the battery cell assembly can also be accommodated in the case by directly fixing a plurality of battery cells in the case.

[0089] As an example, the case can include a first case 2 and a second case 3. The first case 2 and the second case 3 are coupled so that an enclosed space is formed inside the case to accommodate the battery cell assembly. Here, the enclosed means covered or closed, and can be sealed or unsealed. The first case can be a top cover or a bottom plate.

[0090] As an example, the case can include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively coupled to the frame so that an enclosed space is formed inside the case to accommodate the battery cell assembly.

[0091] In some embodiments, the case can be a part of a chassis structure of a vehicle. For example, a part of the case can be at least a part of a floor of the vehicle, or a part of the case can be at least a part of a cross beam and a longitudinal beam of the vehicle.

[0092] Referring to FIGS. 2 and 3, the battery cell 1 can be a secondary battery, which means a battery cell that can be used again by activating active materials through charging after the battery cell is discharged.

[0093] 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 hydrogen battery, a nickel cadmium battery, a lead-acid battery, etc., and the present disclosure is not limited thereto.

[0094] The battery cell 1 generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging of the battery cell, 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 shorting while allowing the active ions to pass through.

[0095] In some embodiments, the battery cell 1 further includes an electrolyte, which functions to conduct ions between the positive and negative electrodes. The present disclosure does not have specific limitations on the type of electrolyte, which can be selected as needed. The electrolyte can be in a liquid state, a gel state, or a solid state.

[0096] In some embodiments, the electrode assembly is in a jellyroll structure. The positive electrode sheet and the negative electrode sheet are wound into the jellyroll structure.

[0097] In some embodiments, the electrode assembly is in a stacked structure.

[0098] In some embodiments, the electrode assembly is provided with tabs, which can conduct current from the electrode assembly. The tabs include positive tabs and negative tabs.

[0099] In some embodiments, the battery cell 1 can include a battery case. The battery case is used to package 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., polypropylene), a composite metal case (e.g., a copper-aluminum composite case), or an aluminum-plastic film, etc.

[0100] As an example, the battery cell 1 can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes, including a square battery cell, a blade battery cell, a multi-prismatic battery cell (e.g., a hexagonal battery cell), etc., and the present disclosure is not particularly limited.

[0101] In some embodiments, the battery case includes an end cap and a battery shell, the battery shell is provided with an opening, and the end cap closes the opening to form a sealed space for accommodating the electrode assembly and other substances such as the electrolyte. The battery shell can be provided with one or more openings. The end cap can also be provided with one or more openings.

[0102] In some embodiments, at least one electrode terminal is provided on the battery case, and the electrode terminal is electrically connected to the tab. The electrode terminal can be directly connected to the tab or indirectly connected to the tab through an adapter component. The electrode terminal can be provided on the end cap or on the battery shell.

[0103] 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.

[0104] In the following, the heat exchange device of some embodiments of the present disclosure will be described in detail with reference to FIGS. 4-12.

[0105] The present disclosure provides a heat exchange device 100 that can be used in an energy storage device, which comprises: a housing 10 comprising an inner cavity 10a, and an air inlet 11 and an air outlet 12 communicating with the inner cavity 10a; a heat exchange assembly 20 comprising an evaporator 23 and at least one condenser 21, the evaporator 23 and the condenser 21 being arranged in the inner cavity 10a, the condenser 21 being located between the air inlet 11 and the air outlet 12, and the condenser 21 being closer to the air outlet 12 side than the evaporator 23; a plurality of cross-flow fans 30, each cross-flow fan 30 comprising a rotatable cross-flow impeller 31, each cross-flow impeller 31 being located in the inner cavity 10a and between the condenser 21 and the air outlet 12, the plurality of cross-flow fans 30 being arranged and the axis direction X of the rotation axis L of each cross-flow impeller 31 being consistent.

[0106] The inner cavity 10a is formed inside the housing 10, which can provide installation space for the heat exchange assembly 20 and the cross-flow fan 30, and at the same time the inner cavity 10a can serve 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 and / or adjacent side of the air outlet 12. The shape of the air outlet 12 can be long strip, square, circular or other shapes.

[0107] As an example, referring to FIG. 4, the housing 10 is a square housing having an air inlet 11 and an air outlet 12 opposite along the length direction Z of the housing 10. Specifically, the housing 10 further comprises a first housing wall 101 (shown in FIG. 7) and a second housing wall 102 (shown in FIG. 7) oppositely arranged along the width direction Y, and a top wall 103 and a bottom wall 104 oppositely arranged along the height direction X (also the axis direction X of the cross-flow impeller 31), the first housing wall 101, the second housing wall 102, the top wall 103 and the bottom wall 104 together enclosing the inner cavity 10a having the air inlet 11 and the air outlet 12.

[0108] The heat exchange assembly 20 can be used to exchange heat with the battery 120 in the energy storage device 1000, thereby performing thermal management on the battery 120, for example, heating or cooling the battery 120, so that the battery 120 can maintain a good working temperature, and the risk of thermal runaway of the battery 120 can be reduced.

[0109] The heat exchange assembly 20 can include an evaporator 23 and a condenser 21, the evaporator 23 and the condenser 21 are located between the air inlet 11 and the air outlet 12, and the condenser 21 is closer to the side of the air outlet 12 than the evaporator 23. In the embodiments shown in FIGS. 6, 7, 9, and 10, the evaporator 23 can be arranged in the space on the left side of the condenser 21 in the inner cavity 10a of the shell 10. The condenser 21 can have a windward side 21b on the windward side and a leeward side 21a on the leeward side, and during the operation of the cross-flow fan 30, the airflow flows from the windward side 21b side of the condenser 21 to the leeward side 21a side. The windward side 21b is close to the side of the air inlet 11, and the leeward side 21a is close to the side of the air outlet 12.

[0110] As an example, referring to FIG. 11, the heat exchange assembly 20 further includes a compressor 22 and an expansion valve 24, the compressor 22, the condenser 21, the evaporator 23, and the expansion valve 24 are connected by a refrigerant circulation pipeline. The refrigerant circulation pipeline is used for the circulation of refrigerant (such as freon).

[0111] During the operation of the condenser 21, a large amount of heat is generated, and the heat generated by the condenser 21 is timely and efficiently discharged outside the shell 10, which can reduce the temperature of the condenser 21 itself and the inner cavity 10a of the shell 10, thereby improving the heat exchange efficiency of the condenser 21.

[0112] Each cross-flow fan 30 includes a rotatable cross-flow impeller 31, which can be driven to rotate by a motor arranged in the fan shell 32.

[0113] Each cross-flow impeller 31 is located in the inner cavity 10a and between the condenser 21 and the air outlet 12, and can generate a local negative pressure by rotating, so that external airflow enters the inner cavity 10a from the air inlet 11 and passes through the windward side 21b and the leeward side 21a of the condenser 21 in turn, thereby carrying out the heat generated during the operation of the condenser 21 through the air outlet 12.

[0114] The plurality of cross-flow fans 30 can be arranged along the axial direction X, for example, longitudinally arranged; the plurality of cross-flow fans 30 can also be arranged along the first direction Y perpendicular to the axial direction X, for example, transversely arranged; a part of the plurality of cross-flow fans 30 can be arranged along the axial direction X, and the other part can be arranged along the first direction Y, for example, the cross-flow fans 30 are longitudinally and transversely arranged at the same time.

[0115] The axis direction X of the rotation axes L of the cross-flow impellers 31 is consistent, which can be understood as the rotation axes L of the cross-flow impellers 31 being parallel and / or coaxial with each other. For example, referring to FIG. 8, when the rotation axes L of the plurality of cross-flow impellers 31 (for example, two) are parallel to each other, the plurality of cross-flow fans 30 can be arranged along the first direction Y; for another example, referring to FIG. 5, when the rotation axes L of the plurality of cross-flow impellers 31 (for example, two) are coaxial, the plurality of cross-flow fans 30 can be arranged along the axis direction X.

[0116] The plurality of cross-flow fans 30 arranged in this way can increase the area of the airflow passing through the condenser 21 and improve the airflow passing through the condenser 21, thereby uniformly and efficiently removing the heat generated by the condenser 21 and improving the heat exchange efficiency. In addition, the axis direction X of the rotation axes L of the cross-flow impellers 31 is consistent, so that the flow directions of the airflows generated by the rotation of the cross-flow impellers 31 are approximately the same, and the probability of mutual interference between the airflows is reduced, thereby enabling the airflows to flow more stably through the condenser 21, continuously and efficiently removing the heat generated by the condenser 21, and improving the heat exchange efficiency. In addition, the cross-flow fan 30 has more uniform air outlet and lower noise than the axial flow fan.

[0117] In some embodiments, among the plurality of cross-flow fans 30, at least two cross-flow fans 30 are arranged along the axis direction X with the cross-flow impellers 31 being coaxial, and the axis direction X is parallel to the plane in which the air outlet 12 is located.

[0118] Among the plurality of cross-flow fans 30, at least two cross-flow fans 30 are arranged along the axis direction X with the cross-flow impellers 31 being coaxial, which can mean that among the plurality of cross-flow fans 30, the axis directions of the rotation axes L of the cross-flow impellers 31 of each cross-flow fan 30 are consistent, and a part of the rotation axes L of the cross-flow impellers 31 are coaxially arranged, and another part of the rotation axes L of the cross-flow impellers 31 are arranged along the first direction Y perpendicular to the axis direction X; or, among the plurality of cross-flow fans 30, the axis directions of the rotation axes L of the cross-flow impellers 31 of each cross-flow fan 30 are consistent, and the rotation axes L of all the cross-flow impellers 31 are coaxially arranged. "Coaxial" can be understood as the rotation axes L of each cross-flow impeller 31 being approximately on the same axis, i.e., the axes approximately coincide. It should be understood that the rotation axes L of each cross-flow impeller 31 being approximately on the same axis can be completely coincident, or can allow a deviation, which can be within a permissible range including installation errors, etc.

[0119] The axis direction X is parallel to the plane in which the air outlet 12 is located, wherein the plane in which the air outlet 12 is located is an imaginary plane, for example, in the square shell 10 in FIG. 4, the imaginary plane is perpendicular to the first shell wall 101 and the second shell wall 102, and the top wall 103 and the bottom wall 104.

[0120] As an example, referring to FIG. 5, the rotation axes L of the through-flow impellers 31 of the two through-flow fans 30 are coaxial, and each through-flow impeller 31 can rotate around the respective rotation axis L.

[0121] Among the plurality of through-flow fans 30, at least two through-flow fans 30 are arranged in a coaxial manner along the axial direction X with respect to the through-flow impellers 31, and the axial direction X is parallel to the plane in which the air outlet 12 is located. The number of through-flow fans 30 can be flexibly adapted according to the size of the air outlet 12 along the axial direction X, thereby helping to achieve a better air outlet effect and reduce noise.

[0122] In some embodiments, among the plurality of through-flow fans 30, at least two through-flow fans 30 are arranged in a side-by-side manner along a first direction Y with respect to the through-flow impellers 31, and the first direction Y is perpendicular to the axial direction X and parallel to the plane in which the air outlet 12 is located.

[0123] Among the plurality of through-flow fans 30, at least two through-flow fans 30 are arranged in a side-by-side manner along a first direction Y with respect to the through-flow impellers 31. This can be that among the plurality of through-flow fans 30, the through-flow impellers 31 of a part of the through-flow fans 30 are arranged in a side-by-side manner along the first direction Y, and the through-flow impellers 31 of another part of the through-flow fans 30 are not arranged along the first direction Y, for example, arranged along the axial direction X; or that among the plurality of through-flow fans 30, the through-flow impellers 31 of all the through-flow fans 30 are arranged along the first direction Y.

[0124] As an example, referring to FIG. 8, the through-flow impellers 31 of the two through-flow fans 30 are arranged along a first direction Y perpendicular to the axial direction X, and the rotation axes L of the two through-flow impellers 31 are parallel to each other.

[0125] Among the plurality of through-flow fans 30, at least two through-flow fans 30 are arranged in a side-by-side manner along a first direction Y with respect to the through-flow impellers 31, and the first direction Y is perpendicular to the axial direction X and parallel to the plane in which the air outlet 12 is located. The number of through-flow fans 30 can be flexibly adapted according to the size of the air outlet 12 along the first direction Y, thereby helping to achieve a better air outlet effect and reduce noise.

[0126] In some embodiments, the air outlet 12 is configured in an elongated shape, and the axial direction X is consistent with the length direction of the air outlet 12.

[0127] Referring to FIG. 4, the size of the air outlet 12 along the axial direction X (length direction) is greater than the size along the first direction Y, thereby configuring the air outlet 12 in an elongated shape.

[0128] The extension direction of the through-flow impellers 31 of the plurality of through-flow fans 30 is consistent with the opening extension direction of the air outlet 12, which can increase the air outlet area and reduce noise.

[0129] In some embodiments, each cross-flow fan 30 comprises a fan housing 32, each fan housing 32 containing a respective cross-flow impeller 31, and a flow passage 32a being formed between the fan housing 32 and the cross-flow impeller 31, each flow passage 32a being independent of each other.

[0130] Each flow passage 32a being independent of each other means that the air flow in each flow passage 32a is not disturbed by the air flow in the other flow passages 32a.

[0131] As an example, each flow passage 32a has an inlet facing the leeward side 21a of the condenser 21 and an outlet communicating with the air outlet 12, the air flow enters the inlet from the leeward side 21a of the condenser 21 and flows out of the outlet via the flow passage 32a, and finally is discharged out of the housing 10 through the air outlet 12.

[0132] By each flow passage 32a being independent of each other, the air flow in each flow passage 32a is not disturbed by the air flow in the other flow passages 32a, so that the air flow can be discharged more stably and uniformly, thereby reducing the noise. In addition, each flow passage 32a being independent of each other also facilitates the control of the direction, speed and flow rate of each air flow, so that the distribution of the air flow can be adjusted flexibly according to the actual needs to achieve the best air outlet effect. Furthermore, it is also convenient for the maintenance and replacement of the cross-flow fan 30.

[0133] In some embodiments, referring to FIGS. 9 and 10, the plurality of cross-flow fans 30 comprises at least one pair of cross-flow fans 30 arranged along the first direction Y, in the pair of cross-flow fans 30, each cross-flow fan 30 comprises a fan housing 32, each fan housing 32 containing a respective cross-flow impeller 31, and a flow passage 32a being formed between the fan housing 32 and the cross-flow impeller 31, each flow passage 32a being independent of each other, the fan housing 32 has an inner guide surface 32b on the side facing the flow passage 32a, the cross-flow impeller 31 and the inner guide surface 32b of one cross-flow fan 30 in the pair of cross-flow fans 30 are mirror-imaged with the cross-flow impeller 31 and the inner guide surface 32b of the other cross-flow fan 30.

[0134] As an example, the cross-flow impeller 31 and the inner guide surface 32b of the two cross-flow fans 30 can be mirror-imaged with respect to an imaginary middle surface O vertically bisecting the air outlet 12.

[0135] The mirror-imaged cross-flow impeller 31 and the inner guide surface 32b of the two cross-flow fans 30 make the air flow distribution at the outlet of each flow passage 32a more uniform, thereby reducing the noise.

[0136] In some embodiments, referring to FIG. 10, the inner side guide surface 32b includes a first guide surface 32b-1 and a second guide surface 32b-2, the first guide surface 32b-1 includes an arc-shaped guide surface, and the second guide surface 32b-2 includes an oblique guide surface, the oblique guide surface is configured to be closer to the first guide surface 32b-1 as closer to the air outlet 12.

[0137] The arc-shaped guide surface and the oblique guide surface can make the airflow more smoothly guide to the air outlet 12, thereby reducing the wind resistance and further reducing the noise.

[0138] In some embodiments, the condenser 21 includes a windward surface 21b and a leeward surface 21a, the leeward surface 21a faces the cross-flow impeller 31, and among the windward surface 21b and the leeward surface 21a, at least the leeward surface 21a is formed to be farther away from the air outlet 12 as closer to the middle surface O, the middle surface O is an imaginary plane that vertically bisects the air outlet 12.

[0139] The leeward surface 21a is formed to be farther away from the air outlet 12 as closer to the middle surface, which can be understood as that the part of the leeward surface 21a close to the middle surface O is concave in the direction away from the air outlet 12. Only the leeward surface 21a can be concave, and the shape of the windward surface 21b is not limited; the leeward surface 21a can also be concave while the windward surface 21b is convex in the direction away from the air outlet 12.

[0140] For example, as shown in FIG. 6 and FIG. 9, two plate-shaped condensers 21 are inclined relative to the middle surface O and the opposite ends of the two condensers 21 are connected, so that the leeward surfaces 21a of the two condensers 21 form a sharp corner structure in the direction away from the air outlet 12. Of course, such a sharp corner structure can also be formed by bending one plate-shaped condenser 21. In addition, the sharp corner structure formed by the two plate-shaped condensers 21 can also be towards the direction close to the air outlet 12.

[0141] For another example, as shown in FIG. 7 and FIG. 10, one condenser 21 is bent to form a circular arc, the leeward surface 21a of the circular arc-shaped condenser 21 is concave, and the windward surface 21b is convex. In addition, the leeward surface 21a of the condenser 21 can be convex, and the windward surface 21b is concave.

[0142] By forming the leeward surface 21a of the condenser 21 to be farther away from the air outlet 12 as closer to the middle surface O, the part of the leeward surface 21a surrounds the cross-flow fan 30, which can increase the area of the airflow passing through the condenser 21, improve the heat exchange efficiency of the condenser 21, and also reduce the space occupation in the inner cavity 10a of the shell 10, which helps to improve the space utilization.

[0143] In some embodiments, the leeward surface 21a of the condenser 21 is symmetrical about the middle surface O.

[0144] The leeward surface 21a can be formed symmetrically about the middle surface O, or both the leeward surface 21a and the windward surface 21b can be symmetrically about the middle surface O. For example, both the leeward surface 21a and the windward surface 21b of the condenser 21 are symmetrically about the middle surface O. The condenser 21 can be one condenser 21 or two condensers 21.

[0145] In this way, the air flow is more evenly through the condenser 21, thereby improving the heat exchange efficiency, and the air flow is more evenly to the air outlet 12, so that the air outlet is more uniform, thereby reducing the noise.

[0146] In some embodiments, among the windward surface 21b and the leeward surface 21a, at least the leeward surface 21a includes a circular arc surface or an inclined surface inclined relative to the middle surface O.

[0147] For example, referring to FIGS. 6 and 9, the leeward surface 21a of the condenser 21 is an inclined surface, and the windward surface 21b can also be an inclined surface. Referring to FIGS. 7 and 10, the leeward surface 21a of the condenser 21 is a circular arc surface, wherein the circular arc surface is concave toward the direction away from the air outlet 12, and the windward surface 21b is convex toward the direction away from the air outlet 12.

[0148] By the leeward surface 21a of the condenser 21 including a circular arc surface or an inclined surface inclined relative to the middle surface O, the surface area of the condenser 21 can be increased, thereby improving the heat exchange efficiency.

[0149] In some embodiments, referring to FIGS. 6 and 9, the heat exchange assembly 20 includes two condensers 21, the leeward surface 21a of each condenser 21 is formed as an inclined surface, and the ends of the two condensers 21 close to each other are connected to each other.

[0150] The ends of the two condensers 21 close to each other can be directly connected or indirectly connected, and the indirect connection can be connected by a partition plate, for example.

[0151] The two condensers 21 connected by the inclined leeward surfaces 21a form a condenser 21 combination with an increased surface area, which can improve the heat exchange efficiency without changing the structure of each condenser 21, thereby reducing the manufacturing cost.

[0152] In some embodiments, the heat exchange assembly 20 includes one condenser 21, and the leeward surface 21a of the condenser 21 is formed as a circular arc surface or an inclined surface.

[0153] The leeward surface 21a of the condenser 21 formed as a circular arc surface or an inclined surface can both increase the surface area of the condenser 21, thereby improving the heat exchange efficiency, and can also reduce the risk of air leakage between multiple condensers 21 due to poor sealing, thereby reducing the air flow loss and further improving the heat exchange efficiency.

[0154] In some embodiments, the air flow channel 32a comprises an inlet and an outlet, and the inlets of the cross-flow fans 30 do not overlap with each other along the projections of the leeward surface 21a of the condenser 21 in the second direction Z, which is perpendicular to the axial direction X.

[0155] The inlets of the cross-flow fans 30 do not overlap with each other along the projections of the leeward surface 21a of the condenser 21 in the second direction Z, which can be understood as the inlets of the cross-flow fans 30 are located at different positions of the leeward surface 21a of the condenser 21 along the projections of the leeward surface 21a of the condenser 21 in the second direction Z, in other words, the inlets of the cross-flow fans 30 correspond to different positions of the leeward surface 21a of the condenser 21.

[0156] The air flows generated by the operation of the cross-flow fans 30 pass through different positions of the condenser 21 respectively, which can increase the heat exchange area of the air flow and the condenser 21, thereby taking away more heat of the condenser 21 and improving the heat exchange efficiency.

[0157] In some embodiments, the heat exchange assembly 20 comprises two or more condensers 21 connected in series, the condensers 21 are arranged along the first direction Y, and the inlets of the cross-flow fans 30 correspond to the leeward surface 21a of each condenser 21 along the projections of the leeward surface 21a of the condenser 21 in the second direction Z, and the first direction Y is perpendicular to the second direction Z and the axial direction X. Corresponding to each condenser 21 can be understood as the leeward surface 21a of each condenser 21 corresponds to the inlet of one cross-flow fan 30.

[0158] As an example, referring to FIG. 9, the condenser 21 and the cross-flow fan 30 are provided with two respectively, and the inlets of the two cross-flow fans 30 correspond to the leeward surface 21a of one condenser 21 and the leeward surface 21a of another condenser 21 respectively. The inlet of the cross-flow fan 30 faces the leeward surface 21a of the condenser 21.

[0159] The inlets of the cross-flow fans 30 correspond to the leeward surface 21a of each condenser 21 along the projections of the leeward surface 21a of the condenser 21 in the second direction Z, so that the air flows generated by the operation of the cross-flow fans 30 pass through different condensers 21 respectively, thereby taking away the heat of each condenser 21 and improving the heat exchange efficiency of each condenser 21.

[0160] In some embodiments, referring to FIG. 7 and FIG. 8, the closest distance d between the rim of the cross-flow impeller 31 and the leeward surface 21a is greater than or equal to 5 mm.

[0161] The closest distance d between the rim of the cross-flow impeller 31 and the leeward surface 21a is the shortest distance between the tangent of the rim of the cross-flow impeller 31 and the tangent of the leeward surface 21a.

[0162] The appropriate distance between the cross-flow impeller 31 and the condenser 21 can provide a gap for the airflow to flow more smoothly and improve the passing efficiency of the airflow through the condenser 21.

[0163] In some embodiments, the cross-flow fan 30 and the condenser 21 are arranged adjacent to the air outlet 12.

[0164] In this way, the air outlet distance can be shortened, the air outlet can be smoother, and more space can be provided for the arrangement of other components.

[0165] In some embodiments, the shell 10 includes a first shell wall 101 and a second shell wall 102 opposite along the first direction Y, the air outlet 12 is located between the first shell wall 101 and the second shell wall 102, and the condenser 21 is connected to the first shell wall 101 and the second shell wall 102 at two ends along the first direction Y, respectively.

[0166] The two ends of the condenser 21 along the first direction Y can be directly or indirectly connected to the first shell wall 101 and the second shell wall 102, so that the condenser 21 divides the inner cavity 10a into two closed spaces along the first direction Y, and the plurality of cross-flow impellers 31 are located in the closed space close to the air outlet 12.

[0167] In this way, the airflow loss can be reduced, more airflow can pass through the condenser 21, and the heat exchange efficiency can be improved.

[0168] In some embodiments, along the second direction Z, a sealing member (not shown in the figure) is arranged between one end of the condenser 21 and the first shell wall 101 and between the other end of the condenser 21 and the second shell wall 102, respectively.

[0169] The sealing member can be a sealing glue, a rubber pad, or other components that can have a sealing effect. In this way, the risk of air leakage can be reduced, and the heat exchange efficiency can be improved.

[0170] In some embodiments, the heat exchange assembly 20 further includes a compressor 22, an evaporator 23, and an expansion valve 24, and the compressor 22, the condenser 21, the evaporator 23, and the expansion valve 24 are connected through a refrigerant circulation pipeline.

[0171] As an example, the evaporator 23 can include two flow channels, one of which is a refrigerant flow channel for circulating refrigerant flow, and the other is a liquid cooling flow channel for communicating with the battery heat exchange assembly in the energy storage device, so as to exchange heat with the battery through the battery heat exchange assembly.

[0172] The airflow generated by the rotation of the cross-flow impeller 31 can uniformly take away the heat generated by the operation of the condenser 21, so that the heat exchange assembly 20 can continuously and efficiently exchange heat with the battery 120 in the energy storage device 1000, thereby improving the working performance of the battery 120.

[0173] One specific example of the present disclosure will be described below with reference to FIGS. 4-12.

[0174] The heat exchange device 100 of the embodiment of the present disclosure comprises a shell 10, a heat exchange assembly 20 and a plurality of cross-flow fans 30. The shell 10 comprises an inner cavity 10a, and an air inlet 11 and an air outlet 12 which are in communication with the inner cavity 10a.

[0175] The heat exchange assembly 20 is arranged in the inner cavity 10a of the shell 10, and the heat exchange assembly 20 comprises a condenser 21, the condenser 21 having a windward side 21b facing the air inlet 11 and a leeward side 21a facing the air outlet 12. The leeward side 21a part surrounds the inlets of the plurality of cross-flow fans 30. The plurality of cross-flow fans 30 are arranged in the inner cavity 10a, each cross-flow fan 30 comprising a fan shell 32 and a cross-flow impeller 31 rotationally connected to the fan shell 32, the cross-flow impeller 31 being located between the condenser 21 and the air outlet 12, and the rotation axis L of the cross-flow impeller 31 of each cross-flow fan 30 is consistent with the height direction X of the shell 10 and extends along the length direction of the long strip-shaped air outlet 12 (the height direction of the shell 10). Each fan shell 32 forms an airflow passage 32a, and each airflow passage 32a is independent of each other.

[0176] In an example, referring to FIGS. 8 and 9, the condenser 21 is provided with two, the two condensers 21 are arranged and connected along the first direction Y (the width direction of the shell 10), the two condensers 21 are both arranged obliquely relative to the middle surface O and symmetric about the middle surface O, the middle surface O is a plane vertically bisecting the air outlet 12 along the first direction Y, one end of the two condensers 21 connected to each other is concave inwardly toward the direction away from the air outlet 12 at the leeward side 21a, and is convex outwardly toward the direction away from the air outlet 12 at the windward side 21b, thereby forming a sharp corner structure, the sharp corner position of the sharp corner structure is opposite to the air outlet 12. The cross-flow impellers 31 of the two cross-flow fans 30 are arranged along the first direction Y and symmetric about the middle surface O, and the inlets of the two cross-flow fans 30 are respectively located on the leeward side 21a of the two condensers 21 along the second direction Z (the length direction of the shell 10) at the projection of the leeward side 21a of the condenser 21. In this way, the airflow generated by the rotation of each cross-flow fan 30 can pass through the condenser 21 respectively, thereby being able to take away the heat of each condenser 21 respectively, and improving the heat exchange efficiency of each condenser 21.

[0177] In another example, referring to FIG. 8 and FIG. 10, the condenser 21 is provided with one, the condenser 21 is bent into a circular arc shape, and is symmetrical about the middle surface O, the condenser 21 has a first circular arc portion 211 and a second circular arc portion 212 symmetrical to the middle surface O along the first direction Y, the leeward surface 21a of the condenser 21 in the circular arc shape is a concave surface, and the windward surface 21b is a convex surface, the convex surface faces away from the air outlet 12. The through-flow impellers 31 of the two through-flow fans 30 are arranged along the first direction Y and are symmetrical about the middle surface O, and the inlets of the two through-flow fans 30 are respectively located on the first circular arc portion 211 and the second circular arc portion 212 of the leeward surface 21a of the condenser 21 along the second direction Z in the projection of the leeward surface 21a of the condenser 21. In this way, the airflow generated by the operation of each through-flow fan 30 can pass through the two portions of the condenser 21 respectively, so as to take away the heat of the entire surface of the condenser 21, thereby improving the heat exchange efficiency of the condenser 21.

[0178] In yet another example, referring to FIG. 5 and FIG. 6, the condenser 21 and the through-flow fan 30 are also provided with two, the two condensers 21 are arranged in the same way as the condensers 21 in the embodiment of FIG. 9, and the difference is that the two through-flow fans 30 are arranged along the axial direction X (the height direction of the shell 10) in a coaxial manner with the through-flow impellers 31, and the inlets of the through-flow fans 30 can be arranged symmetrically relative to the middle surface O.

[0179] In still another example, referring to FIG. 5 and FIG. 7, the condenser 21 is provided with one, and the through-flow fan 30 is provided with two, the condenser 21 is arranged in the same way as the condenser 21 in the embodiment of FIG. 10, and the difference is that the two through-flow fans 30 are arranged along the axial direction X (the height direction of the shell 10) in a coaxial manner with the through-flow impellers 31, and the inlets of the through-flow fans 30 can be arranged symmetrically relative to the middle surface O.

[0180] In the embodiments of the present disclosure, compared with the axial flow fan, the through-flow fan 30 generates more uniform airflow and has higher efficiency during operation, can reduce noise, and can improve the heat exchange efficiency of the condenser 21. In addition, by changing the shape of the condenser 21, the heat exchange area of the condenser 21 can be increased, and by arranging the leeward surface 21a of the condenser 21 to be symmetrical and arranging the plurality of through-flow fans 30 to be symmetrical, the inlets of the through-flow fans 30 can correspond to different positions of the condenser 21, so that the airflow flowing through the condenser 21 has a larger and more uniform area, thereby taking away more heat of the condenser 21, thereby improving the heat exchange efficiency of the condenser.

[0181] A second aspect of the present disclosure provides a storage device 1000, as shown in FIG. 1, comprising: a storage box 110, which contains at least one battery device 120; and a heat exchange device 100 according to any one of the embodiments described above, which is used for heat exchange with the battery device 120.

[0182] The battery device 120 can exchange heat with the heat exchange device 100 through a heat management assembly. As an example, referring to FIG. 12, the heat management assembly includes a heat exchange medium circulation pipeline 131, and can also include a circulation pump 132 for driving circulation of the heat exchange medium in the heat exchange medium circulation pipeline 131, and the battery device 120 exchanges heat with the heat exchange device 100 through the heat exchange medium in the heat exchange medium circulation pipeline 131. In a specific embodiment, the heat exchange medium circulation pipeline 131 is provided with a liquid cooling plate 133 which is in contact with or close to the battery monomer in the battery device 120 to facilitate heat transfer; the heat exchange medium circulation pipeline 131 is in communication with the liquid cooling flow channel of the evaporator 23, and the heat exchange medium which has been heat exchanged (cooled) by the evaporator 23 flows in the heat exchange medium circulation pipeline 131 to the liquid cooling plate 133, so as to directly exchange heat with the battery device 120 through the liquid cooling plate 133. Of course, the battery device 120 can also directly exchange heat with the heat exchange medium circulation pipeline through heat transfer.

[0183] The heat exchange medium can be liquid or gaseous, or a phase change material. As a specific example of the heat exchange medium, ethylene glycol or water can be used.

[0184] In some embodiments, the heat exchange device 100 is arranged in the energy storage box 110, and the energy storage box 110 is provided with an air outlet 111 (shown in FIG. 1) which is in communication with the air outlet 12, and an air inlet 112 (shown in FIG. 1) which is in communication with the air inlet 11. External airflow enters the shell 10 through the air inlet 112, enters the air inlet 11 of the heat exchange device 100, exchanges heat with the condenser 21, and then is discharged from the air outlet 12 of the heat exchange device 100, and finally is discharged outside the energy storage box 110 through the air outlet 111.

[0185] The above embodiments are only used to illustrate the technical solutions of the present disclosure, but not to limit it; although the present disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent replacement to 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 all be covered in the scope of the claims and the specification of the present disclosure. Especially, 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.

Claims

1. A heat exchange device for an energy storage device, comprising: a housing including an inner cavity, an air inlet and an air outlet communicating with the inner cavity; a heat exchange assembly including an evaporator and at least one condenser, the evaporator and the condenser being disposed in the inner cavity, the condenser being located between the air inlet and the air outlet, the condenser being closer to the air outlet side than the evaporator; and a plurality of cross-flow fans, each of the cross-flow fans including a rotatable cross-flow impeller, each of the cross-flow impellers being located in the inner cavity and between the condenser and the air outlet, the plurality of cross-flow fans being arranged with the axis directions of the rotation shafts of the cross-flow impellers being consistent. 2.The heat exchange device according to claim 1, wherein at least two of the cross-flow fans are arranged along the axis direction with the cross-flow impellers being coaxial, and the axis direction is parallel to a plane in which the air outlet is located. 3.The heat exchange device according to claim 1 or 2, wherein at least two of the cross-flow fans are arranged with the cross-flow impellers being juxtaposed along a first direction, the first direction being perpendicular to the axis direction and parallel to the plane in which the air outlet is located. 4.The heat exchange device according to any one of claims 1 to 3, wherein the air outlet is configured in a long strip shape, and the axis direction is consistent with the length direction of the air outlet. 5.The heat exchange device according to any one of claims 1 to 4, wherein each of the cross-flow fans includes a fan housing accommodating the cross-flow impeller, and an airflow passage is formed between the fan housing and the cross-flow impeller, and each of the airflow passages is independent of each other. 6.The heat exchange device according to claim 3, wherein the plurality of cross-flow fans include at least one pair of cross-flow fans arranged along the first direction, each of the cross-flow fans includes a fan housing accommodating the cross-flow impeller, and an airflow passage is formed between the fan housing and the cross-flow impeller, and each of the airflow passages is independent of each other, the fan housing has an inner side flow guide surface on a side facing the airflow passage, and the cross-flow impeller and the inner side flow guide surface of one of the cross-flow fans are arranged in mirror image with the cross-flow impeller and the inner side flow guide surface of the other cross-flow fan. 7.The heat exchange device according to claim 6, wherein the inner side flow guide surface includes a first flow guide surface and a second flow guide surface, the first flow guide surface includes an arc-shaped flow guide surface, and the second flow guide surface includes an oblique flow guide surface configured to be closer to the first flow guide surface as closer to the air outlet. 8.The heat exchange device according to any one of claims 5 to 7, wherein the condenser includes a windward surface and a leeward surface, and the leeward surface faces the cross-flow impeller, at least the leeward surface is configured to be farther away from the air outlet as closer to a middle surface, and the middle surface is an imaginary plane vertically bisecting the air outlet. 9.The heat exchange device according to claim 8, wherein ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The leeward face of the condenser is formed symmetrically about the intermediate face.

10. The heat exchange device according to claim 8 or 9, wherein Among the windward face and the leeward face, at least the leeward face comprises a circular arc face or an inclined face inclined relative to the intermediate face.

11. The heat exchange device according to claim 10, wherein The heat exchange assembly comprises two condensers, the leeward face of each condenser is formed as the inclined face, and the two condensers are connected to each other at one end close to each other.

12. The heat exchange device according to claim 10, wherein The heat exchange assembly comprises one condenser, and the leeward face of the condenser is formed as the circular arc face or the inclined face.

13. The heat exchange device according to any one of claims 5 to 10, wherein The airflow passage comprises an inlet and an outlet, and the inlets of the cross-flow fans do not overlap with each other in the projection of the leeward face of the condenser along a second direction perpendicular to the axial direction.

14. The heat exchange device according to claim 13, wherein The heat exchange assembly comprises two or more condensers connected to each other, the condensers are arranged along a first direction, the projection of the inlet of each cross-flow fan corresponds to the leeward face of each condenser, and the first direction is perpendicular to the second direction and the axial direction.

15. The heat exchange device according to any one of claims 1 to 14, wherein The distance between the rim of the cross-flow impeller and the nearest point of the leeward face of the condenser is greater than or equal to 5 mm.

16. The heat exchange device according to any one of claims 1 to 15, wherein The cross-flow fan and the condenser are arranged adjacent to the air outlet.

17. The heat exchange device according to any one of claims 1 to 16, wherein The housing comprises a first housing wall and a second housing wall opposite to each other along a first direction, the air outlet is located between the first housing wall and the second housing wall, and the two ends of the condenser along a second direction are connected to the first housing wall and the second housing wall, respectively.

18. The heat exchange device according to claim 17, wherein Along the second direction, a sealing member is arranged between one end of the condenser and the first housing wall and between the other end of the condenser and the second housing wall, respectively.

19. The heat exchange device according to any one of claims 1 to 18, wherein The heat exchange assembly further comprises 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.

20. An energy storage device, comprising: An energy storage box containing at least one battery device; The heat exchange device according to any one of claims 1 to 19, which is used for heat exchange with the battery device.

21. The energy storage device according to claim 20, wherein 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 and an air inlet communicating with the air inlet.

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