Energy storage device

Abstract

The present application discloses an energy storage device, comprising a first housing, a plurality of battery modules, a liquid cooling unit, a refrigerant channel, at least one cooling assembly and a first fan, wherein the plurality of battery modules are disposed in the first housing and are arranged at intervals in a first direction, and at least a portion of the refrigerant channel is located between adjacent battery modules; the battery modules and the cooling assembly are arranged in the first direction; the cooling assembly comprises a first flow channel, the liquid cooling unit being connected to the first flow channel; and the first fan is configured to drive a first refrigerant to flow through the refrigerant channel. By means of the liquid cooling unit, the battery modules are cooled; and by means of the first fan driving the first refrigerant to flow through the refrigerant channel, heat from the energy storage device is dissipated, thereby transferring heat from the battery modules to the outside, reducing the temperature of the battery modules and improving heat dissipation efficiency.

Description

Energy storage devices Technical Field

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

[0002] Currently, energy storage devices are widely used in fields such as smart energy storage devices. Energy storage devices generate a lot of heat during use, and they need to dissipate heat.

[0003] Summary of the Invention

[0004] Therefore, it is necessary to provide an energy storage device that improves heat dissipation.

[0005] Embodiments of this application provide an energy storage device, including a first housing, multiple battery modules, a refrigerant channel, a liquid cooling unit, at least one cooling component, and a first fan. The multiple battery modules are disposed within the first housing and arranged at intervals along a first direction. At least a portion of the refrigerant channel is located between adjacent battery modules. The battery modules and the cooling component are arranged along the first direction. The cooling component includes a first flow channel, and the liquid cooling unit is connected to the first flow channel. The first fan is configured to drive a first refrigerant to flow in the refrigerant channel. The liquid cooling unit cools the battery modules, and the first fan drives the first refrigerant to flow in the refrigerant channel, dissipating heat from the energy storage device, dissipating the heat from the battery modules to the outside, reducing the temperature of the battery modules, and improving heat dissipation efficiency.

[0006] In one or more of the above optional embodiments, the first housing includes a first wall and a heat exchanger, the first wall and the heat exchanger being disposed opposite each other along a second direction. Along the second direction, a first gap exists between the plurality of battery modules and the first wall, and a second gap exists between the plurality of battery modules and the heat exchanger. A refrigerant channel connects the first gap and the second gap, and the first direction is perpendicular to the second direction. A first fan is disposed within the first housing and configured to drive the first refrigerant to flow between the first gap, the second gap, and the refrigerant channel. Through the heat exchanger, the first refrigerant can exchange heat with the heat exchanger, further improving heat dissipation efficiency.

[0007] In one or more of the above optional embodiments, along the second direction, the first housing includes a first housing opening disposed opposite to the first wall, and the heat exchange member closes at least a portion of the first housing opening.

[0008] In one or more of the above optional embodiments, the energy storage device includes a first partition. The first partition divides a first housing into a first chamber and a second chamber arranged along a first direction, and a plurality of battery modules are located in one of the first chamber and the second chamber.

[0009] In one or more optional embodiments above, the first passage is included between the plurality of battery modules and the first partition, and the first fan is located in the first passage. The first fan is configured to drive the first refrigerant to flow in the refrigerant passage, the first gap, the second gap, and the first passage, and the first fan is beneficial to drive the first refrigerant.

[0010] In one or more optional embodiments above, the first passage includes a first passage inlet and a first passage outlet, and the first passage inlet is in communication with the first gap. In the first direction, the first passage outlet is farther away from the plurality of battery modules than the first passage inlet. When the first refrigerant flows from the first passage inlet to the first passage outlet, the first refrigerant is reduced to flow directly to the heat exchange member in the second direction, and the first refrigerant is reduced to flow back to the first passage inlet after colliding with the heat exchange member.

[0011] In one or more optional embodiments above, the first partition includes a first horizontal portion and a first bent portion, and the first bent portion extends away from the battery modules. The second partition includes a second horizontal portion and a second bent portion, and the second bent portion extends away from the battery modules. The first bent portion and the second bent portion guide the first refrigerant to flow away from the battery modules, reduce the first refrigerant to flow directly to the heat exchange member in the second direction, and reduce the first refrigerant to flow back to the first passage inlet after colliding with the heat exchange member.

[0012] In one or more optional embodiments above, the first partition includes a first horizontal portion and a first bent portion, and the first bent portion extends away from the battery modules. The second partition includes a second bent portion, and the second bent portion extends away from the battery modules. The first bent portion and the second bent portion guide the first refrigerant to flow away from the battery modules, reduce the first refrigerant to flow directly to the heat exchange member in the second direction, and reduce the first refrigerant to flow back to the first passage inlet after colliding with the heat exchange member.

[0013] In one or more optional embodiments above, the energy storage device includes a second partition located in the first chamber. The second partition and the first partition are spaced apart in the first direction, and the first partition and the second partition are part of the first passage. The first partition and the second partition are part of the first passage outlet.

[0014] In one or more optional embodiments above, the energy storage device includes an electrical module electrically connected to the battery modules, and the electrical module is located in the other one of the first chamber and the second chamber. The electrical module and the battery modules are located in different chambers, and the heat generated by the electrical module and the heat generated by the battery modules are isolated, which is beneficial to improve the heat dissipation of the battery modules.

[0015] In one or more optional embodiments above, the liquid cooling unit includes a driving device and a pipe. The driving device is located in the other one of the first chamber and the second chamber, and the plurality of battery modules, the electrical module, and the driving device are arranged along the first direction. A portion of the pipe is located in the first chamber, and the pipe connects the driving device with the first flow channel.

[0016] In one or more optional embodiments above, the energy storage device includes a second housing, which is arranged in the first housing. The second housing and the first partition member are partial components of the first space, and the first space is isolated from the outside of the first space. The plurality of battery modules are arranged in the first space, which can reduce the flow of the first coolant in the first space to the outside and reduce the influence on heat dissipation.

[0017] In one or more optional embodiments above, the energy storage device includes a first opening and a second opening arranged opposite along the second direction. The first opening and the second opening are formed by the second housing and the first partition member, and the heat exchange member encloses at least a portion of the second opening. The first wall encloses the first opening. Alternatively, the energy storage device includes a first connecting wall, which encloses the first opening so that the first coolant in the first space is isolated from the space outside the first space.

[0018] In one or more optional embodiments above, the second housing includes a first side wall, a second side wall, and a second housing top wall. The second housing top wall and the first partition member are arranged along the first direction. The second housing top wall connects the first side wall and the second side wall, and the first partition member connects the first side wall and the second side wall. The first side wall, the second side wall, the second housing top wall, and the first partition member form the first opening and the second opening. The heat exchange member connects the first side wall, the second side wall, the second housing top wall, and the first partition member, and encloses the second opening. The first connecting wall connects the first side wall, the second side wall, the second housing top wall, and the first partition member, and encloses the first opening; or, the first wall connects the first side wall, the second side wall, the second housing top wall, and the first partition member, and encloses the first opening so that the first coolant in the first space is isolated from the space outside the first space.

[0019] In one or more optional embodiments above, the first fan is located in the first space, which is conducive to improving heat dissipation of the battery modules.

[0020] In one or more optional embodiments above, the heat exchange member includes a first heat exchange channel and a second heat exchange channel arranged opposite. The first heat exchange channel communicates with the coolant channel, and the second heat exchange channel is configured to provide a flow path for the second coolant. The heat of the first coolant is conducted out through the second heat exchange channel.

[0021] In one or more optional embodiments above, the temperature of the second coolant is lower than the temperature of the first coolant, which is conducive to heat dissipation.

[0022] In one or more optional embodiments above, the second heat exchange passage is in external communication with the energy storage device, and the second heat exchange passage is configured to allow air outside the energy storage device to flow in the second heat exchange passage. The second refrigerant includes the air outside the energy storage device.

[0023] In one or more optional embodiments above, the heat exchange member includes a fixed plate and a heat exchange element. The heat exchange element is arranged along the second direction with the fixed plate, and the fixed plate is provided with an inlet and an outlet, and the second heat exchange passage is in communication with the inlet and the outlet.

[0024] In one or more optional embodiments above, the first heat exchange passage includes a first end and a second end arranged along the first direction, the first end is closed, and the second end is in communication with the first passage. The first heat exchange passage includes a first heat exchange opening, and the first heat exchange opening is in communication with the second gap. This can reduce the flow of air from the first end to the inlet and from the outlet to the external environment, which is conducive to heat dissipation.

[0025] In one or more optional embodiments above, the second heat exchange passage includes a third end and a fourth end arranged along the first direction, the second heat exchange passage extends along the first direction, the third end is configured to allow the second refrigerant to pass through, and the fourth end is closed. The second heat exchange passage includes a second heat exchange opening configured to allow the second refrigerant to pass through. This can reduce the flow of air from the external environment into the second housing through the fourth end, which is conducive to heat dissipation.

[0026] In one or more optional embodiments above, the heat exchange member includes a second fan. The second fan is fixed to the fixed plate, and the second fan is configured to drive the second refrigerant to enter the second heat exchange passage from the inlet and to be discharged from the outlet.

[0027] In one or more optional embodiments above, the heat exchange member includes a frame connected to the fixed plate, and the frame is arranged in the second housing. The heat exchange element is arranged in the frame along the first direction, and the heat exchange element is spaced apart from the frame to form a connecting opening, and the first passage is in communication with the connecting opening.

[0028] In one or more optional embodiments above, along the second direction, a part of the projection of the second partition is located in the projection of the connecting opening, which reduces the flow of air to positions outside the first heat exchange passage, which is conducive to heat dissipation.

[0029] In one or more optional embodiments above, along the second direction, a part of the projection of the first partition is located in the projection of the connecting opening, which further reduces the flow of air to positions outside the first heat exchange passage, which is conducive to heat dissipation.

[0030] In one or more optional embodiments above, the heat exchange member includes a first baffle connected to the frame. The first heat exchange passage includes a first section between the first baffle and the fixed plate in the second direction. The first baffle covers the first section. A projection of the first section in the second direction overlaps a projection of the first passage, and the projection of the first section is separated from a projection of the battery module. The first baffle limits air flow out of the first section, which is conducive to heat dissipation.

[0031] In one or more optional embodiments above, the heat exchange member includes a second baffle connected to the frame. The second fan is located between the second baffle and the fixed plate in the second direction. A projection of the second baffle in the second direction is separated from a projection of the refrigerant passage, and the projection of the second baffle is connected to or partially overlaps a projection of the heat exchange member. The second baffle can block external air from entering the first space, which is conducive to heat dissipation.

[0032] In one or more optional embodiments above, the cooling assembly includes a cooling member and a cover member. The cooling member includes a first flow channel. At least part of the refrigerant passage is located between the cooling member and the cover member.

[0033] In one or more optional embodiments above, the cooling assembly includes a fin located in the refrigerant passage. The fin separates the refrigerant passage into a plurality of sub-paths, and the sub-paths communicate the first gap and the second gap. The fin can increase the contact area between the air in the refrigerant passage and the cooling member, and the heat of the air in the refrigerant passage is transferred to the cooling member through the fin, which is conducive to heat dissipation.

[0034] In one or more optional embodiments above, the battery module includes a first top wall, and the cooling assembly is spaced apart from the first top wall, and the cooling assembly and the first top wall form the refrigerant passage. Alternatively, the battery module includes a first bottom wall opposite the first top wall in the first direction, and the cooling assembly and the first bottom wall form the refrigerant passage.

[0035] In one or more optional embodiments above, the cooling assembly includes a first support. The first support supports the battery module. The cooling member, the first support, and the cover member are at least part of the components forming the refrigerant passage.

[0036] In one or more optional embodiments above, the first support includes a first support member and a second support member spaced apart. The first support member is fixed to the cooling member, and the second support member is fixed to the cooling member.

[0037] In one or more optional embodiments above, the cooling assembly further includes at least one second support. The second support, the first support member, and the second support member form at least one third opening. The cover member covers the third opening, reducing the air flow out of the refrigerant passage through the third opening, which leads to a decrease in heat dissipation effect.

[0038] In one or more optional embodiments above, at least part of the cover is located at the third opening, reducing the air flow from the refrigerant channel through the third opening, and reducing the heat dissipation effect.

[0039] In one or more optional embodiments above, along the first direction, the second support is connected to the side of the first support away from the cooling member. The second support can protect the first support, and during transportation or assembly, the second support can be contacted by external handling equipment, reducing the stress on the first support, the battery module, and the cooling member.

[0040] In one or more optional embodiments above, the refrigerant channel includes a refrigerant channel first opening and a refrigerant channel second opening. The energy storage device includes at least two second supports, one of which, the first support, the second support, and the cooling member form the refrigerant channel first opening, and the other, the first support, the second support, and the cooling member form the refrigerant channel second opening.

[0041] In one or more optional embodiments above, along the first direction, the cover does not exceed the second support. Along the first direction, the second support is the outermost, and the second support can protect the cover. During transportation or assembly, external handling equipment can act on the second support, supporting the weight of the battery module, the cooling member, and the first support through the second support, reducing the stress on the first support, the battery module, and the cooling member, and reducing the risk of deformation of the cooling member due to stress.

[0042] In one or more optional embodiments above, the cover abuts the first support, reducing the gap between the cover and the first support, and improving heat dissipation.

[0043] In one or more optional embodiments above, the cover abuts the second support, reducing the gap between the cover and the second support, and improving heat dissipation.

[0044] In one or more optional embodiments above, the cover abuts the first support, and the cover abuts the second support, reducing the gap between the cover and the first support and reducing the gap between the cover and the second support, further improving heat dissipation.

[0045] In one or more optional embodiments above, the refrigerant channel includes a refrigerant channel first opening and a refrigerant channel second opening. The first support, the second support, the cover, and the cooling member form the refrigerant channel first opening and the refrigerant channel second opening.

[0046] In one or more optional embodiments above, the thermal conductivity of the cover is less than 0.5 W / m·K, which can reduce the heat exchange between the refrigerant channel and the outside of the energy storage module.

[0047] In one or more optional embodiments above, the cover comprises at least one of foam, polyurethane, epoxy resin, aerogel, foamed glue.

[0048] In one or more optional embodiments above, the energy storage device comprises a plurality of third supports arranged on a side of the cooling assembly away from the first support. The battery module is arranged between two third supports, and the battery module is connected to the two third supports.

[0049] In one or more optional embodiments above, the battery module comprises a plurality of cell groups arranged along a third direction. Each cell group comprises at least two cells arranged along a second direction. The energy storage device comprises a plurality of first side covers. Along the second direction, the cell group is arranged between two first side covers, and the cell group and the two first side covers are fixed. The first side cover is fixed to the third support.

[0050] In one or more optional embodiments above, along the first direction, the third support comprises a second top wall facing away from the cooling member, and the first side cover is fixed to the second top wall. When the cell expands, the expansion force received by the first side cover can be transmitted to the third support through the second top wall, reducing the expansion force received by the first side cover.

[0051] In one or more optional embodiments above, the fin comprises a first sub-channel and a second sub-channel arranged at intervals. The first sub-channel communicates the air inlet opening and the air outlet opening. The second sub-channel communicates the air inlet opening and the air outlet opening. Along the first direction, the first sub-channel comprises a third opening facing the cover, and the cover covers the third opening. The second sub-channel comprises a fourth opening facing the cooling member, and the cooling member covers the fourth opening. The air in the refrigerant channel can directly contact the cooling member through the fourth opening, which is conducive to heat dissipation.

[0052] The energy storage device of the present application cools the battery module through the liquid cooling unit, drives the first refrigerant to flow in the refrigerant channel through the first fan, dissipates heat of the battery module to the outside, reduces the temperature of the battery module, and improves the heat dissipation efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0053] Figure 1 shows a structural schematic diagram of an energy storage device in some embodiments.

[0054] Figure 2 shows an exploded schematic diagram of an energy storage device in some embodiments.

[0055] Figure 3 shows a cross-sectional schematic diagram of the energy storage device of Figure 1 along A-A.

[0056] Figure 4 shows a partially enlarged schematic diagram in Figure 3.

[0057] Figure 5 shows a simplified schematic diagram in Figure 3.

[0058] Figure 6 shows a schematic diagram of another view of the embodiment of Figure 3.

[0059] Figure 7 shows a schematic diagram of another embodiment of an energy storage device.

[0060] Figure 8 shows a schematic diagram of the embodiment of Figure 3.

[0061] Figure 9 shows a schematic diagram of the embodiment of Figure 7.

[0062] Figure 10 shows a schematic diagram of another embodiment.

[0063] Figure 11 shows an exploded view of an energy storage device in another embodiment.

[0064] Figure 12 shows a structural diagram of part of an energy storage device in some embodiments.

[0065] Figure 13 shows an exploded view of the part of the energy storage device of Figure 12.

[0066] Figure 14 shows a structural diagram of the part of the energy storage device of Figure 12 from another view.

[0067] Figure 15 shows a structural diagram of the part of the energy storage device of Figure 12.

[0068] Figure 16 shows a cross-sectional view of the part of the energy storage device in some embodiments.

[0069] Figure 17 shows a structural diagram of a heat exchange element in some embodiments.

[0070] Figure 18 shows a structural diagram of the heat exchange element from another view in some embodiments.

[0071] Figure 19 shows a cross-sectional view of the heat exchange element in some embodiments.

[0072] Figure 20 shows a structural diagram of part of a heat exchange element in some embodiments.

[0073] Figure 21 shows a structural diagram of part of a heat exchange element in some embodiments.

[0074] Figure 22 shows a schematic diagram of a battery module and cooling assembly in some embodiments.

[0075] Figure 23 shows a schematic diagram of a battery module and cooling assembly in another embodiment.

[0076] Figure 24 shows an exploded view of a battery module and cooling assembly in some embodiments.

[0077] Figure 25 shows a cross-sectional view of part of the structure of Figure 24.

[0078] FIG. 26 shows a partially enlarged view of FIG. 25.

[0079] FIG. 27 shows a structural view of a cooling assembly, a first support, and a second support in some embodiments.

[0080] FIG. 28 shows a structural view of a cooling assembly, a first support, and a second support in some embodiments.

[0081] FIG. 29 shows a structural view of a cooling assembly, a first support, a second support, and a third support in some embodiments.

[0082] FIG. 30 shows an exploded view of a portion of the structure of FIG. 29.

[0083] FIG. 31 shows a structural view of a cooling assembly, a first support, a second support, and a third support in some embodiments.

[0084] FIG. 32 shows a structural view of FIG. 31 from another perspective.

[0085] FIG. 33 shows a structural view of a battery module and a cooling assembly in some embodiments.

[0086] FIG. 34 shows an enlarged view of a portion of the structure of FIG. 33.

[0087] FIG. 35 shows a structural view of a fin in some embodiments.

[0088] Explanation of main element symbols:

[0089] energy storage device 100

[0090] pressure relief portion 100a

[0091] first gap 101

[0092] second gap 102

[0093] first housing 10

[0094] first housing opening 10a

[0095] accommodation space 10a1

[0096] Second housing opening 10b

[0097] First chamber 10c

[0098] Second chamber 10d

[0099] First receiving chamber 10e

[0100] Second receiving chamber 10f

[0101] First wall 11

[0102] Second wall 12

[0103] Third wall 13

[0104] First housing top wall 14

[0105] First top wall opening 141

[0106] First housing bottom wall 15

[0107] Fourth wall 16

[0108] First beam 17

[0109] Second beam 18

[0110] Support plate 19

[0111] Battery module 20

[0112] Refrigerant passage 20a

[0113] Refrigerant passage first opening 201

[0114] Refrigerant passage second opening 202

[0115] First top wall 20b

[0116] First bottom wall 20c

[0117] Battery cell group 20d

[0118] Cooling assembly 21

[0119] Cooling member 211

[0120] Second space 211a

[0121] First cooling member 2111

[0122] Second cooling member 2112

[0123] Flow channel inlet 2113

[0124] Flow channel outlet 2114

[0125] Cover member 212

[0126] First support 220

[0127] First support member 221

[0128] Second support member 222

[0129] Third support member 223

[0130] Second support 230

[0131] Third opening 230a

[0132] Housing 240

[0133] Second accommodating space 240a

[0134] First flow channel 21a

[0135] Battery cell 22

[0136] Heat exchange member 30

[0137] First heat exchange channel 30a

[0138] First end 301

[0139] Second end 302

[0140] First heat exchange opening 310

[0141] Second heat exchange channel 30b

[0142] Third end 303

[0143] Fourth end 304

[0144] Connection port 30c

[0145] Second heat exchange opening 320

[0146] First section 330

[0147] Fixing plate 31

[0148] inlet 311

[0149] outlet 312

[0150] heat exchanger 32

[0151] frame 33

[0152] first accommodation space 33a

[0153] first frame plate 332

[0154] second frame plate 333

[0155] first baffle 34

[0156] second fan 35

[0157] second baffle 36

[0158] first fan 40

[0159] second housing 50

[0160] first opening 50a

[0161] second opening 50b

[0162] first passage 50c

[0163] first passage inlet 50c1

[0164] first passage outlet 50c2

[0165] First space 501

[0166] First side wall 51

[0167] Second side wall 52

[0168] Second housing top wall 54

[0169] Second top wall opening 541

[0170] First protrusion 542

[0171] Fin 60

[0172] Air inlet opening 60a

[0173] Air outlet opening 60b

[0174] Third opening 620

[0175] Fourth opening 630

[0176] Third bracket 70

[0177] Connecting recess 70a

[0178] Second top wall 71

[0179] First side cover 80

[0180] Connecting protrusion 80a

[0181] First partition 103

[0182] First extension part 103a

[0183] First horizontal part 1031

[0184] First bending part 1032

[0185] Electric module 104

[0186] Second partition 105

[0187] Second extension part 105a

[0188] Second horizontal part 1051

[0189] Second bending part 1052

[0190] Liquid cooling unit 110

[0191] Pipe 110a

[0192] Inflow pipe 110a1

[0193] Outflow pipe 110a2

[0194] Driving device 110b

[0195] First connecting wall 120

[0196] Shielding plate 130

[0197] Through hole 130a

[0198] First fin 140

[0199] First direction X

[0200] Second direction Y

[0201] Third direction Z

[0202] The following specific embodiments will further illustrate this application in conjunction with the above-described accompanying drawings. Detailed Implementation

[0203] The following specific embodiments are exemplary and not limiting, and are intended to provide a basic understanding of this application, and are not intended to identify key or decisive elements of this application or limit the scope of protection. As long as there is no structural conflict, the technical features mentioned in the various embodiments can be combined in any manner.

[0204] When a component is considered to be "located" on another component, it can be directly on the other component or may also be interspersed with other components. When a component is considered to be "connected" to another component, it can be directly connected to the other component or may also be interspersed with other components.

[0205] It is understandable that the term "perpendicular" is used to describe an ideal state between two components. In actual production or use, two components can exist in a state that is approximately perpendicular or equal to each other. For example, combined with numerical description, perpendicularity can refer to the angle between two straight lines within the range of 90° ± 10°, the dihedral angle between two planes within the range of 90° ± 10°, or the angle between a straight line and a plane within the range of 90° ± 10°. The two components described as "perpendicular" do not have to be absolutely straight lines or planes; they can be approximately straight lines or planes. From a macroscopic perspective, if the overall direction of extension is a straight line or plane, the component can be considered a "straight line" or "plane".

[0206] The terms “vertical,” “horizontal,” “left,” “right,” “top,” “bottom,” “front,” “back,” and similar expressions used herein are for illustrative purposes only and are not intended to limit this application.

[0207] Unless otherwise defined, the term "multiple" in this document, when used to describe the number of components, specifically means that the component is two or more.

[0208] Embodiments of the present application provide a kind of energy storage equipment, including first shell, multiple battery modules, refrigerant passage, liquid cooling unit, at least one cooling component and first fan. Multiple battery modules are located in first shell, multiple battery modules are arranged along the first direction interval, at least part of refrigerant passage is located between adjacent battery modules. Battery module and cooling component are arranged along the first direction, and cooling component includes first flow channel, and liquid cooling unit is connected to first flow channel. First fan is configured to drive first refrigerant flow in refrigerant passage. By liquid cooling unit, battery module is cooled, by first fan, first refrigerant is driven to flow in refrigerant passage, the heat of battery module is dissipated to the outside, the temperature of battery module is reduced, and the heat dissipation efficiency is improved.

[0209] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments can be combined with each other without conflict.

[0210] Please refer to FIG. 1 to FIG. 3, an embodiment of the present application provides an energy storage equipment 100, including a first shell 10 and multiple battery modules 20. Multiple battery modules 20 are located in the first shell 10.

[0211] In some embodiments, multiple battery modules 20 are arranged along the first direction X interval, and the energy storage equipment 100 includes a refrigerant passage 20a, at least part of the refrigerant passage 20a is located between adjacent battery modules 20. The refrigerant passage 20a can pass the first refrigerant, and dissipate heat for the battery module 20.

[0212] Please refer to FIG. 3 and FIG. 30, in some embodiments, the energy storage equipment 100 includes a liquid cooling unit 110 and at least one cooling component 21. The battery module 20 and the cooling component 21 are arranged along the first direction X.

[0213] In some embodiments, the cooling component 21 includes a first flow channel 21a, and the liquid cooling unit 110 is connected to the first flow channel 21a. The liquid cooling unit 110 delivers the flowable refrigerant to the first flow channel 21a through the pipeline. Optionally, the flowable refrigerant includes but is not limited to water, coolant and the like.

[0214] In some embodiments, the energy storage equipment 100 includes a first fan 40, and the first fan 40 is configured to drive the first refrigerant to flow in the refrigerant passage 20a. Optionally, the first refrigerant includes air.

[0215] The present application cools the battery module 20 by the liquid cooling unit 110, and cools the energy storage equipment 100 by the first fan 40 driving the first refrigerant to flow in the refrigerant passage 20a, dissipates the heat of the battery module 20 to the outside, reduces the temperature of the battery module 20, and improves the heat dissipation efficiency.

[0216] Referring to FIGS. 3-5, the energy storage device 100 includes a plurality of refrigerant channels 20a, one of which is disposed between adjacent battery modules 20, and at least a portion of each refrigerant channel 20a is located between adjacent battery modules 20.

[0217] In some embodiments, the energy storage device 100 includes a plurality of refrigerant channels 20a, one of which is disposed between adjacent battery modules 20, and at least a portion of each refrigerant channel 20a is located between adjacent battery modules 20. For example, the energy storage device 100 includes six battery modules 20 and four refrigerant channels 20a, one of which is disposed between adjacent battery modules 20, and at least a portion of each refrigerant channel 20a is located between adjacent battery modules 20.

[0218] In some embodiments, the energy storage device 100 includes a heat exchange member 30, and the first housing 10 includes a first wall 11, the first wall 11 and the heat exchange member 30 are arranged along a second direction Y, and the first direction X is perpendicular to the second direction Y.

[0219] In some embodiments, along the second direction Y, a first gap 101 is present between the plurality of battery modules 20 and the first wall 11, a second gap 102 is present between the plurality of battery modules 20 and the heat exchange member 30, and the refrigerant channel 20a communicates the first gap 101 and the second gap 102.

[0220] In some embodiments, the first fan 40 is disposed in the first housing 10, and the first fan 40 drives the first refrigerant to flow between the first gap 101, the second gap 102, and the refrigerant channel 20a. Through the heat exchange member 30, the first refrigerant can exchange heat with the heat exchange member 30, further improving the heat dissipation efficiency.

[0221] In some embodiments, along the second direction Y, the refrigerant channel 20a communicates the first gap 101 and the second gap 102, improving the heat dissipation of the battery modules 20.

[0222] Referring to FIGS. 2 and 3, in some embodiments, along the second direction Y, the first housing 10 includes a first housing opening 10a, and the first housing opening 10a and the first wall 11 are oppositely disposed. The heat exchange member 30 at least partially closes the first housing opening 10a.

[0223] In some embodiments, the heat exchange member 30 is exposed to the outside of the energy storage device 100, and can directly exchange heat with the air outside the energy storage device 100, and the heat of the battery modules 20 is conducted to the outside.

[0224] Referring to FIGS. 1-3, in some embodiments, the first housing 10 includes a second wall 12 and a third wall 13 arranged along a third direction Z, and the first wall 11 connects the second wall 12 and the third wall 13. Along the third direction Z, the battery module 20 is disposed between the second wall 12 and the third wall 13. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0225] In some embodiments, referring to FIG. 3, the first housing 10 includes a fourth wall 16, and the first wall 11 and the fourth wall 16 are arranged along the second direction Y. The fourth wall 16 connects the second wall 12 and the third wall 13.

[0226] In some embodiments, the first housing 10 includes a first housing top wall 14 and a first housing bottom wall 15 arranged along the first direction X. The first wall 11, the second wall 12, the third wall 13, the first housing top wall 14, and the first housing bottom wall 15 form a receiving space 10a1, and the battery module 20 is located in the receiving space 10a1.

[0227] In some embodiments, the heat exchange member 30 closes a portion of the first housing opening 10a, and the fourth wall 16 closes the remaining portion of the first housing opening 10a.

[0228] In some embodiments, the first wall 11 closes the second housing opening 10b.

[0229] In some embodiments, the first housing 10 includes a plurality of first beams 17 extending along the first direction X and a plurality of second beams 18 extending along the second direction Y. The second beams 18 are located in the receiving space, and the second beams 18 carry the battery module 20.

[0230] In some embodiments, the energy storage device 100 includes a first partition 103 that divides the first housing 10 into a first chamber 10c and a second chamber 10d arranged along the first direction X.

[0231] Referring to FIG. 3 and FIG. 5, FIG. 5 shows a simplified schematic diagram of FIG. 3, in which the sizes of different components are modified for better illustration of the flow path of the first coolant, such as the battery module 20 and the coolant channel 20a, and does not limit FIG. 3. Along the first direction X, the plurality of battery modules 20 and the first partition 103 are sequentially and spacedly arranged. In other embodiments, along the first direction X, the first partition 103 and the plurality of battery modules 20 are sequentially and spacedly arranged.

[0232] In some embodiments, the plurality of battery modules 20 are located in one of the first chamber 10c and the second chamber 10d.

[0233] In some embodiments, the first partition 103 is fixedly connected to the second wall 12 and the third wall 13.

[0234] In some embodiments, the energy storage device 100 comprises an electrical module 104, which is located in the other one of the first chamber 10c and the second chamber 10d, and is electrically connected to the battery module 20. The electrical module 104 and the battery module 20 are located in different chambers, and the heat generated by the electrical module 104 and the heat generated by the battery module 20 are isolated, which is conducive to improving the heat dissipation of the battery module 20.

[0235] In some embodiments, the electrical module 104 comprises a battery management system (BMS), which is electrically connected to the battery module 20 and is used to control the charging and discharging of the battery module 20.

[0236] In some embodiments, the electrical module 104 comprises a power conversion system (PCS), which is electrically connected to the battery module 20 and is used to convert AC and DC.

[0237] In some embodiments, the energy storage device 100 comprises a third fan (not shown), which is located in the same chamber as the electrical module 104 and can drive the air flow in the chamber to dissipate heat from the electrical module 104. The third fan drives the air in the chamber to exchange heat with the first partition 103, and the first partition 103 dissipates heat from the electrical module 104.

[0238] In some embodiments, the first direction X is the direction of gravity, the plurality of battery modules 20 are located in the first chamber 10c, and the electrical module 104 is located in the second chamber 10d. The energy storage device 100 comprises a pressure relief portion 100a provided on the top wall 14 of the first housing, which is conducive to the pressure relief of the battery module 20.

[0239] In some embodiments, the energy storage device comprises a first channel 50c between the plurality of battery modules 20 and the first partition 103, and the first fan 40 is configured to drive the first coolant to flow in the coolant channel 20a, the first gap 101, the second gap 102 and the first channel 50c.

[0240] In some embodiments, referring to FIG. 3, along the first direction X, the first channel 50c is located between the plurality of battery modules 20 and the first partition 103. The first channel 50c is located below the plurality of battery modules 20. In this application, FIG. 3 is used as an example for illustration.

[0241] In some embodiments, the first channel 50c is located between the plurality of battery modules 20 and the first partition 103 in a direction opposite to the first direction X. The first channel 50c is located above the plurality of battery modules 20. In some embodiments, the first fan 40 is located within the first channel 50c, and the first fan 40 is configured to drive the first coolant.

[0242] In some embodiments, the first channel 50c is located between the lowermost battery module 20 and the first partition 103 in the first direction X.

[0243] In some embodiments, the first channel 50c comprises a first channel inlet 50c1 and a first channel outlet 50c2, and the first channel inlet 50c1 is in communication with the first gap 101. In the first direction X, the first channel outlet 50c2 is further away from the plurality of battery modules than the first channel inlet 50c1. When the first coolant flows from the first channel inlet 50c1 to the first channel outlet 50c2, the first coolant is less likely to flow directly to the heat exchanger 30 in the second direction Y, and the first coolant is less likely to flow along the first channel 50c towards the first channel inlet 50c1 after colliding with the heat exchanger 30.

[0244] Referring to FIGS. 3, 6 and 7, in some embodiments, the energy storage device 100 comprises a second partition 105 located in the first chamber 10c. The second partition 105 is spaced apart from the first partition 103 in the first direction X. The first partition 103 and the second partition 105 are configured to form part of the first channel 50c, and the first partition 103 and the second partition 105 are configured to form part of the first channel outlet 50c2.

[0245] In some embodiments, the second partition 105 and the first partition 103 are located in the same chamber.

[0246] Referring to FIGS. 2 and 3, in some embodiments, the liquid cooling unit 110 comprises a pipe 110a and a driving device 110b. The driving device 110b is located in the other one of the first chamber 10c and the second chamber 10d, and the driving device 110b and the electrical module 104 are located in the same chamber. The pipe 110a is partially located in the first chamber 10c and partially located in the second chamber 10d. The pipe 110a connects the driving device 110b with the first flow channel 21a. The plurality of battery modules 20, the electrical module 104 and the driving device 110b are arranged in the first direction X.

[0247] In some embodiments, the pipe 110a includes an inflow pipe 110a1 and an outflow pipe 110a2, and the driving device 110b drives the flowable coolant to flow into the inflow pipe 110a1, to flow into the first flow channel 21a, and to flow out of the first flow channel 21a to the outflow pipe 110a2. The flowable coolant can carry heat away from the battery module 20 or transfer heat to the battery module 20. Optionally, the flowable coolant includes water.

[0248] Referring to FIG. 5, the flow path of the first coolant, which is air, is shown. For convenience of description, the battery module 20 and the coolant channel 20a are simplified. The first fan 40 is located in the first channel 50c, drives the air in the first gap 101 to flow through the first channel 50c, and then the air passes through the heat exchange member 30, the temperature of the air is lowered after passing through the heat exchange member 30, passes through the second gap 102, enters the coolant channel 20a, and then flows to the first gap 101. The air entering the coolant channel 20a cools the battery module 20.

[0249] In some embodiments, the first fan 40 is in operation together with the heat exchange member 30, the temperature of the first coolant is lowered by the heat exchange member 30, and the battery module 20 is cooled. The driving device 110b delivers the flowable coolant to the first flow channel 21a through the pipe 110a, carries away the heat of the battery module 20 or transfers heat to the battery module 20 through the first flow channel 21a, realizes the cooling of the battery module 20 by the heat exchange member 30, and the flowable coolant can uniform the temperature of the plurality of battery modules 20 and reduce the temperature difference between different battery modules 20.

[0250] In some embodiments, the liquid cooling unit 110 includes a refrigeration part (not shown), which can lower the temperature of the flowable coolant and enhance the cooling of the battery module 20.

[0251] Referring to FIG. 11, the difference between FIG. 11 and FIG. 3 is that the heat exchange member 30 is not provided. The first housing 10 includes a fourth wall 16, and the first wall 11 and the fourth wall 16 are arranged along the second direction Y. The fourth wall 16 connects the second wall 12, the third wall 13, and the first housing bottom wall 15, and the fourth wall 16 closes the first housing opening 10a. The first fan 40 is configured to drive the first coolant to flow between the first gap 101, the second gap 102, and the coolant channel 20a.

[0252] In some embodiments, referring to FIG. 11, the liquid cooling unit 110 includes a refrigeration part (not shown), which can lower the temperature of the flowable coolant, and the flowable coolant can dissipate heat from the battery module 20. The first fan 40 is in operation. The first fan 40 drives air to flow between the first gap 101, the second gap 102, and the coolant passage 20a, and the air carries away heat from the battery module 20, reducing the temperature difference between the battery module 20. The first fan 40 drives air to flow through the cooling member 211, which can reduce the condensation formed on the surface of the cooling member 211.

[0253] Referring to FIGS. 2, 3, and 12-15, in some embodiments, the energy storage device 100 includes a second housing 50, which is disposed in the first housing 10. The second housing 50 is connected to the first partition 103, and the second housing 50 and the first partition 103 serve as partial components of the first space 501, in which the plurality of battery modules 20 are disposed. The first space 501 is isolated from the space outside the first space 501, which can reduce the flow of the first coolant in the first space 501 to the outside and reduce the impact on heat dissipation.

[0254] In some embodiments, the second housing 50 includes a first side wall 51, a second side wall 52, and a second housing top wall 54. The first side wall 51 and the second side wall 52 are spaced apart along the third direction Z, and the second housing top wall 54 and the first partition 103 are spaced apart along the first direction X. The second housing top wall 54 is connected to the first side wall 51 and the second side wall 52, and the first partition 103 is connected to the first side wall 51 and the second side wall 52.

[0255] In some embodiments, the first partition 103 is fixedly connected to the second wall 12 and the third wall 13, and the second partition 105 is fixedly connected to the second wall 12 and the third wall 13. The first partition 103, the second partition 105, the second wall 12, and the third wall 13 form the first passage outlet 50c2.

[0256] In some embodiments, referring to FIGS. 2-7, the first partition 103 is fixedly connected to the first side wall 51 and the second side wall 52, and the second partition 105 is fixedly connected to the first side wall 51 and the second side wall 52. The first partition 103, the second partition 105, the first side wall 51, and the second side wall 52 form the first passage outlet 50c2.

[0257] Referring to FIG. 3 and FIG. 6, the first partition 103 includes a first horizontal portion 1031 and a first bent portion 1032 extending away from the battery module 20. The second partition 105 includes a second horizontal portion 1051 and a second bent portion 1052 extending away from the battery module 20. The first bent portion 1032 and the second bent portion 1052 direct the first coolant to flow away from the battery module 20, reducing the first coolant flowing directly to the heat exchanger 30 in the second direction Y, and reducing the first coolant flowing along the first passage 50c toward the first passage inlet 50cl after colliding with the heat exchanger 30.

[0258] Referring to FIG. 7, the first partition 103 includes a first horizontal portion 1031 and a first bent portion 1032 extending away from the battery module 20. The second partition 105 includes a second bent portion 1052 extending away from the battery module 20. The first bent portion 1032 and the second bent portion 1052 direct the first coolant to flow away from the battery module 20, reducing the first coolant flowing directly to the heat exchanger 30 in the second direction Y, and reducing the first coolant flowing along the first passage 50c toward the first passage inlet 50cl after colliding with the heat exchanger 30.

[0259] Referring to FIG. 8 and FIG. 9, FIG. 8 is a simplified schematic diagram of the embodiment of FIG. 3, and FIG. 9 is a simplified schematic diagram of the embodiment of FIG. 7. One cooling assembly 21 is disposed on a side of the battery module 20 close to the first partition 103, where the battery module 20 is the one closest to the first partition 103. The first side wall 51, the second side wall 52, the cooling assembly 21 connected to the battery module 20, the first partition 103, and the second partition 105 form the first passage 50c. Optionally, the first side wall 51, the second side wall 52, the cooling assembly 21 connected to the battery module 20, and the first partition 103 form the first passage inlet 50cl.

[0260] Referring to FIG. 10, FIG. 10 is a simplified schematic diagram of another embodiment. One cooling assembly 21 is disposed on a side of the battery module 20 close to the first partition 103, where the battery module 20 is the one closest to the first partition 103. The first side wall 51, the second side wall 52, the first partition 103, and the second partition 105 form the first passage 50c. The first side wall 51, the second side wall 52, the first partition 103, and the second partition 105 form the first passage inlet 50cl.

[0261] In some embodiments, the first partition 103 is fixedly connected to the second wall 12 and the third wall 13, and the second partition 105 is fixedly connected to the second wall 12 and the third wall 13. One of the cooling assemblies 21 is arranged on the side of the battery module 20 closest to the first partition 103, where the battery module 20 is the battery module 20 closest to the first partition 103. The second wall 12, the third wall 13, the cooling assembly 21 connected to the battery module 20, the first partition 103, and the second partition 105 form the first passage 50c. Optionally, the second wall 12, the third wall 13, the cooling assembly 21 connected to the battery module 20, and the first partition 103 form the first passage inlet 50c1.

[0262] In some embodiments, the first partition 103 is fixedly connected to the second wall 12 and the third wall 13, and the second partition 105 is fixedly connected to the second wall 12 and the third wall 13. One of the cooling assemblies 21 is arranged on the side of the battery module 20 closest to the first partition 103, where the battery module 20 is the battery module 20 closest to the first partition 103. The second wall 12, the third wall 13, the first partition 103, and the second partition 105 form the first passage 50c. The second wall 12, the third wall 13, the first partition 103, and the second partition 105 form the first passage inlet 50c1.

[0263] In some embodiments, the first fan 40 is located in the first space 501, and the plurality of battery modules 20 are located in the first space 501, which is conducive to improving the heat dissipation of the battery modules 20.

[0264] Referring to FIGS. 2, 12-15, in some embodiments, the energy storage device 100 includes a first opening 50a and a second opening 50b arranged opposite each other in the second direction Y. The second shell 50 connects the first partition 103 and forms the first opening 50a and the second opening 50b. The heat exchange member 30 seals at least part of the second opening 50b, so that the first coolant in the first space 501 is isolated from the space outside the first space 501.

[0265] Referring to FIGS. 12-15, in some embodiments, the energy storage device 100 includes a first connecting wall 120. The first connecting wall 120 seals the first opening 50a, and the heat exchange member 30 seals at least part of the second opening 50b, so that the first coolant in the first space 501 is isolated from the space outside the first space 501.

[0266] Referring to FIG. 16, in some embodiments, the energy storage device 100 includes a first extension 103a connected to one end of the first partition 103 close to the first connecting wall 120, and the first extension 103a is connected to the first connecting wall 120, which strengthens the sealing between the first connecting wall 120 and the first partition 103. It is conducive to heat dissipation.

[0267] In some embodiments, the first wall 11 encloses the first opening 50a, and the heat exchange member 30 encloses at least part of the second opening 50b, so that the first coolant in the first space 501 is insulated from the space outside the first space 501.

[0268] In some embodiments, the heat exchange member 30 encloses the entire second opening 50b, increases the contact area between the heat exchange member 30 and the first coolant, and improves the heat dissipation of the battery module 20.

[0269] In some embodiments, the first wall 11 and the first connecting wall 120 are arranged along the second direction Y. The first gap 101 is located between the first connecting wall 120 and the battery module 20.

[0270] Referring to FIGS. 12-15, in some embodiments, the first side wall 51, the second side wall 52, the first partition 103, and the second housing top wall 54 form the first opening 50a and the second opening 50b.

[0271] Referring to FIGS. 12-15, in some embodiments, the first connecting wall 120 connects the first side wall 51, the second side wall 52, the first partition 103, and the second housing top wall 54, and encloses the first opening 50a.

[0272] In some embodiments, the heat exchange member 30 connects the first side wall 51, the second side wall 52, the first partition 103, and the second housing top wall 54, and encloses the second opening 50b.

[0273] In some embodiments, the first wall 11 connects the first side wall 51, the second side wall 52, the first partition 103, and the second housing top wall 54, and encloses the first opening 50a. The heat exchange member 30 connects the first side wall 51, the second side wall 52, the first partition 103, and the second housing top wall 54, and encloses the second opening 50b.

[0274] In some embodiments, the pressure relief portion 100a is provided on the first housing top wall 14, and when the battery module 20 is relieved of pressure, the pressure is relieved through the pressure relief portion 100a.

[0275] Referring to FIGS. 1-3 and 12-15, in some embodiments, the first housing top wall 14 is provided with a first top wall opening 141, and the first top wall opening 141 penetrates the first housing top wall 14 along the first direction X. The pressure relief portion 100a encloses the first top wall opening 141.

[0276] In some embodiments, the second top wall 54 is provided with a second top wall opening 541, which penetrates the second top wall 54 along the first direction X. An edge of the first top wall opening 141 is provided with a first protrusion 542. The pressure relief part 100a is connected to the first protrusion 542 and closes the second top wall opening 541, so that the first space 501 is in a closed state. The pressure relief part 100a can relieve the pressure of the battery module 20 in the first space 501.

[0277] In some embodiments, the second top wall 54 is not provided with the second top wall opening 541 and other openings.

[0278] Referring to FIG. 15, in some embodiments, the energy storage device 100 includes a shielding plate 130 provided with a through hole 130a. The shielding plate 130 is connected to the first side wall 51, the second side wall 52, the first partition 103, and the second partition 105. The first fan 40 is fixedly connected to the shielding plate 130. The first fan 40 can discharge the first refrigerant from the first gap 101 to the first channel 50c through the through hole 130a. The shielding plate 130 can further block the air flow in the first channel 50c, reduce the return air, and facilitate heat dissipation.

[0279] Referring to FIGS. 2 and 3, in some embodiments, the first housing 10 includes a support plate 19. Along the first direction X, a first receiving chamber 10e is formed between the first partition 103 and the support plate 19. The first receiving chamber 10e is isolated from the first space 501. The electrical module 104 is arranged in the first receiving chamber 10e.

[0280] In some embodiments, the support plate 19 and the first housing bottom wall 15 are spaced apart along the first direction X and form a second receiving chamber 10f. The liquid cooling unit 110 is arranged in the second receiving chamber 10f.

[0281] Referring to FIG. 16, in some embodiments, the energy storage device 100 includes a first fin 140 connected to the first partition 103. This facilitates heat dissipation of the electrical module 104. Optionally, the first fin 140 includes a heat dissipation fin.

[0282] Referring to FIGS. 3 and 18, in some embodiments, the heat exchange member 30 includes a first heat exchange channel 30a and a second heat exchange channel 30b arranged in isolation. The first heat exchange channel 30a communicates with the refrigerant channel 20a. The second heat exchange channel 30b is configured to provide a flow path for a second refrigerant. The temperature of the second refrigerant is lower than that of the first refrigerant, and the heat of the first refrigerant is conducted out through the second heat exchange channel 30b. Optionally, the second refrigerant includes a liquid coolant. Optionally, the second refrigerant includes air.

[0283] In some embodiments, the second heat exchange channel 30b is in communication with the outside of the energy storage device 100. The second heat exchange channel 30b is configured to allow air outside the energy storage device 100 to flow through the second heat exchange channel 30b. The second refrigerant includes the air outside the energy storage device. The air outside the energy storage device enters the second heat exchange channel 30b, and the first refrigerant in the first heat exchange channel 30a can exchange heat with the air in the second heat exchange channel 30b.

[0284] In some embodiments, the second heat exchange channel 30b is in communication with a cooling device outside the energy storage device 100. The second heat exchange channel 30b is configured to allow a cooling medium of the cooling device outside the energy storage device to flow through the second heat exchange channel 30b.

[0285] In some embodiments, the first heat exchange channel 30a and the second heat exchange channel 30b are arranged in the second direction Y.

[0286] Referring to FIGS. 3, 17-21, in some embodiments, the heat exchange member 30 includes a fixed plate 31 fixedly connected to the first housing 10. The fixed plate 31 is provided with an inlet 311 and an outlet 312. The second heat exchange channel 30b is in communication with the inlet 311 and the outlet 312.

[0287] In some embodiments, the heat exchange member 30 includes a heat exchange piece 32 arranged in the second direction Y with the fixed plate 31. The first heat exchange channel 30a and the second heat exchange channel 30b are arranged on opposite sides of the heat exchange piece 32.

[0288] In some embodiments, the first heat exchange channel 30a and the second heat exchange channel 30b are continuously bent by the sheet-shaped heat exchange piece 32.

[0289] In some embodiments, as viewed in the first direction X, the first heat exchange channel 30a is in one of a triangular shape, a quadrilateral shape, or an arc shape.

[0290] In some embodiments, as viewed in the first direction X, the second heat exchange channel 30b is in one of a triangular shape, a quadrilateral shape, or an arc shape.

[0291] In some embodiments, the heat exchange piece 32 includes a heat dissipation fin.

[0292] In some embodiments, referring to FIGS. 17, 20, and 21, the first heat exchange channel 30a extends in the first direction X. The first heat exchange channel 30a includes a first end 301 and a second end 302 arranged in the first direction X. The first end 301 is closed, and the second end 302 is in communication with the first channel 50c.

[0293] In some embodiments, the first heat exchange channel 30a includes a first heat exchange opening 310 facing the battery module 20, and the first heat exchange opening 310 is in communication with the second gap 102.

[0294] In some embodiments, along the second direction Y, the projection of the inlet 311 is spaced apart from the projection of the heat exchange member 32. The air in the first channel 50c enters the first heat exchange channel 30a from the second end 302, and flows from the first heat exchange opening 310 to the refrigerant channel 20a through the second gap 102, which can reduce the air flowing from the first end 301 to the inlet 311 and from the outlet 312 to the external environment, and is conducive to heat dissipation.

[0295] In some embodiments, the second heat exchange channel 30b extends along the first direction X. The second heat exchange channel 30b includes a third end 303 and a fourth end 304 arranged along the first direction X. The fourth end 304 is closed, and the third end 303 is configured to pass the second refrigerant.

[0296] In some embodiments, the second heat exchange channel 30b includes a second heat exchange opening 320 facing the fixed plate 31, and the first heat exchange opening 310 and the second heat exchange opening 320 are spaced apart along the second direction Y. The second heat exchange opening 320 is configured to pass the second refrigerant.

[0297] In some embodiments, along the second direction Y, the projection of the outlet 312 overlaps the projection of the heat exchange member 32, and the second heat exchange opening 320 communicates with the outlet 312. The air from the external environment enters the second heat exchange channel 30b through the inlet 311 and the third end 303, and flows from the second heat exchange opening 320 to the outlet 312, which can reduce the air from the external environment flowing into the second housing 50, and is conducive to heat dissipation.

[0298] In some embodiments, the heat exchange member 30 includes a frame 33 connected to the fixed plate 31. The frame 33 is arranged in the second housing 50. The heat exchange member 32 is arranged in the frame 33, and the frame 33 is spaced apart from the heat exchange member 32 along the first direction X and forms a connecting port 30c. The first channel 50c communicates with the connecting port 30c.

[0299] In some embodiments, the frame 33 includes two first frame plates 332 and two second frame plates 333. The two first frame plates 332 are arranged along the first direction X, and the two second frame plates 333 are arranged along the third direction Z. One of the first frame plates 332 is connected to one end of the two second frame plates 333, and the other first frame plate 332 is connected to the other end of the two second frame plates 333, and forms a first containing space 33a. The heat exchange member 32 is arranged in the first containing space 33a.

[0300] In some embodiments, the heat exchange member 32 and one of the first frame plates 332 are spaced apart along the second direction Y and form the connecting port 30c.

[0301] In some embodiments, one of the second frame plates 333 is connected to the inner surface of the first side wall 51, and the other second frame plate 333 is connected to the inner surface of the second side wall 52, one of the first frame plates 332 is connected to the inner surface of the first partition 103, and the other first frame plate 332 is connected to the inner surface of the second housing top wall 54.

[0302] In some embodiments, along the second direction Y, the projection of the second partition 105 is located within the projection of the connecting port 30c, reducing the air flow to locations other than the first heat exchange channel 30a, and facilitating heat dissipation.

[0303] In some embodiments, along the second direction Y, the projection of the first partition 103 is located within the projection of the connecting port 30c, further reducing the air flow to locations other than the first heat exchange channel 30a, and facilitating heat dissipation.

[0304] In some embodiments, along the second direction Y, the projection of the first channel outlet 50c2 is located within the projection of the connecting port 30c, further reducing the air flow to locations other than the first heat exchange channel 30a, and facilitating heat dissipation.

[0305] Referring to FIGS. 18 and 19, in some embodiments, the heat exchange member 30 includes a first baffle plate 34 connected to the two second frame plates 333. Along the first direction X, the first heat exchange channel 30a includes a first section 330 located between the first baffle plate 34 and the fixed plate 31 along the second direction Y. The first baffle plate 34 covers the first section 330.

[0306] In some embodiments, along the second direction Y, the projection of the first section 330 overlaps with the projection of the first channel 50c, and the projection of the first section 330 is separated from the projection of the battery module 20. The first baffle plate 34 limits the air flow out of the first section 330, facilitating heat dissipation.

[0307] Referring to FIG. 16, in some embodiments, the energy storage device 100 includes a second extension 105a connected to the end of the second partition 105 close to the heat exchange member 30, and the second extension 105a is connected to the first baffle plate 34, strengthening the sealing of the first baffle plate 34 and the second extension 105a, reducing the air flow to locations other than the first heat exchange channel 30a, and facilitating heat dissipation.

[0308] Referring to FIGS. 18 and 19, in some embodiments, the heat exchange member 30 includes a second fan 35 fixedly connected to the fixed plate 31, and the second fan 35 is configured to drive the second refrigerant to enter the second heat exchange channel 30b from the inlet 311 and to be discharged from the outlet 312.

[0309] In some embodiments, the second fan 35 and the heat exchange member 32 are arranged along the first direction X.

[0310] In some embodiments, the heat exchange member 30 comprises a second baffle plate 36 connecting the first baffle plate 332 and the two second baffle plates 333. In the second direction Y, the second fan 35 is located between the second baffle plate 36 and the fixed plate 31, and the second baffle plate 36 can block external air from entering the first space 501, thereby facilitating heat dissipation.

[0311] In some embodiments, in the second direction Y, the projection of the second baffle plate 36 is separated from the projection of the refrigerant channel 20a, and the projection of the second baffle plate 36 is connected to or partially overlaps with the projection of the heat exchange member 32, thereby facilitating heat dissipation.

[0312] In some embodiments, the energy storage device 100 comprises M battery modules 20 and M cooling assemblies 21, and one cooling assembly 21 is connected to one battery module 20.

[0313] In some embodiments, as shown in FIG. 3, the energy storage device 100 comprises 4 battery modules 20 and 4 cooling assemblies 21, and one cooling assembly 21 is connected to one battery module 20 on the side close to the first partition 103.

[0314] Referring to FIG. 22, in some embodiments, the battery module 20 comprises a first top wall 20b, and the first top wall 20b and the cooling assembly 21 are spaced apart, and the cooling assembly 21 and the first top wall 20b form the refrigerant channel 20a.

[0315] Referring to FIG. 23, in some embodiments, the battery module 20 comprises a first bottom wall 20c, and the first top wall 20b and the first bottom wall 20c are oppositely arranged in the first direction X, and the cooling assembly 21 and the first bottom wall 20c form the refrigerant channel 20a.

[0316] Referring to FIGS. 24-28, in some embodiments, the energy storage device 100 comprises a cooling assembly 21, and the cooling assembly 21 comprises a cooling member 211 and a covering member 212, and at least part of the refrigerant channel 20a is located between the cooling member 211 and the covering member 212.

[0317] In some embodiments, other components form the refrigerant channel 20a, and at least part of the refrigerant channel 20a is located between the cooling member 211 and the covering member 212. The other components are at least partially located between the cooling member 211 and the covering member 212. For example, a pipe forms the refrigerant channel 20a, and the pipe is at least partially located between the cooling member 211 and the covering member 212.

[0318] In some embodiments, the battery module 20 is in contact with the cooling member 211.

[0319] In some embodiments, the battery module 20 is connected to the cooling member 211 by a spacer. Optionally, the battery module 20 is connected to the cooling member 211 by a thermal conductive glue.

[0320] In some embodiments, the cover 212 is located between the cooling member 211 and the battery module 20 along the first direction X. The battery module 20 is connected to the cooling member 211 by the cover 212.

[0321] In some embodiments, the cooling member channel 20a comprises a cooling member channel first opening 201 and a cooling member channel second opening 202. The cooling member channel 20a is connected to the first gap 101 and the second gap 102 by the cooling member channel first opening 201 and the cooling member channel second opening 202.

[0322] In some embodiments, the cooling member channel first opening 201 is an air inlet, and the cooling member channel second opening 202 is an air outlet.

[0323] In some embodiments, the cooling member channel second opening 202 is an air inlet, and the cooling member channel first opening 201 is an air outlet.

[0324] In some embodiments, the cooling member channel first opening 201 and the cooling member channel second opening 202 are oppositely arranged along the second direction Y.

[0325] In some embodiments, the cooling member 211 comprises a first cooling member 2111 and a second cooling member 2112. The first cooling member 2111 and the second cooling member 2112 are arranged along the first direction X. The first cooling member 2111 is connected to the second cooling member 2112 to form a second space 211a, and the first flow channel 21a is arranged in the second space 211a.

[0326] In some embodiments, the cooling member 211 comprises a flow channel inlet 2113 and a flow channel outlet 2114, and two ends of the first flow channel 21a are connected to the flow channel inlet 2113 and the flow channel outlet 2114. The flow channel inlet 2113, the first flow channel 21a, and the flow channel outlet 2114 are configured to allow the first coolant to flow into the first flow channel 21a from the flow channel inlet 2113 and flow out of the first flow channel 21a from the flow channel outlet 2114.

[0327] In some embodiments, the cooling assembly 21 comprises a first support 220, the first support 220 supports the battery module 20, and the cooling member 211, the first support 220, and the cover 212 are at least part of the components forming the cooling member channel 20a. Optionally, the cooling member 211, the first support 220, and the cover 212 form the cooling member channel 20a. Optionally, the cooling member 211, the first support 220, the cover 212, and other components form the cooling member channel 20a.

[0328] In some embodiments, the first support 220 comprises a first support member 221 and a second support member 222. The first support member 221 is fixed to the cooling member 211, and the second support member 222 is fixed to the cooling member 211. The fixing manner includes but is not limited to welding, clamping, screwing.

[0329] In some embodiments, the first support member 221 and the second support member 222 are spaced apart along the third direction Z.

[0330] In some embodiments, the first support member 221 is fixedly connected to the cover member 212, and the second support member 222 is fixedly connected to the cover member 212.

[0331] In some embodiments, the first support member 221, the second support member 222, the cooling member 211, and the cover member 212 are at least part of the components forming the refrigerant passage 20a. Alternatively, the cooling member 211, the first support member 221, the second support member 222, and the cover member 212 form the refrigerant passage 20a. Alternatively, the cooling member 211, the first support member 221, the second support member 222, the cover member 212, and other components form the refrigerant passage 20a.

[0332] In some embodiments, referring to FIG. 28, the cooling member 211, the first support member 221, the second support member 222, and the cover member 212 form the refrigerant passage 20a.

[0333] In some embodiments, referring to FIG. 30, the cooling member 211, the first support member 221, the second support member 222, the cover member 212, the second support 230, and the refrigerant passage 20a are formed.

[0334] In some embodiments, the first support member 221, the second support member 222, the cooling member 211, and the cover member 212 form the refrigerant passage first opening 201. The first support member 221, the second support member 222, the cooling member 211, and the cover member 212 form the refrigerant passage second opening 202.

[0335] Referring to FIG. 30, in some embodiments, the cooling assembly 21 comprises a third support member 223. The third support member 223 is located between the first support member 221 and the second support member 222 along the third direction Z. The third support member 223 can strengthen the support force on the battery module 20 and the cooling member 211.

[0336] In some embodiments, at least one of the first support member 221, the second support member 222, and the third support member 223 is hollow along the second direction Y, which is ventilated, beneficial for heat dissipation, and can reduce the weight of the energy storage device 100.

[0337] Referring to FIGS. 30-32, in some embodiments, the energy storage device 100 includes at least one second support 230, the second support 230, the first support 221 and the second support 222 form at least one third opening 230a, the cover 212 covers the third opening 230a, and the air flow from the refrigerant passage 20a through the third opening 230a is reduced, so that the situation that the heat dissipation effect is reduced is avoided. Optionally, the cover 212 covers the whole of the third opening 230a. Optionally, the cover 212 covers at least part of the third opening 230a.

[0338] Referring to FIG. 30, in some embodiments, the energy storage device 100 includes three second supports 230, the second supports 230, the first support 221 and the second support 222 form two third openings 230a.

[0339] In some embodiments, the energy storage device 100 includes two second supports 230, the second supports 230, the first support 221 and the second support 222 form one third opening 230a.

[0340] In some embodiments, the energy storage device 100 includes one second support 230, the second support 230, the first support 221 and the second support 222 form two third openings 230a.

[0341] In some embodiments, the energy storage device 100 includes one second support 230, the second support 230, the first support 221 and the second support 222 form one third opening 230a.

[0342] In some embodiments, the second support 230 and the cover 212 are arranged along the first direction X. The cover 212 is fixedly connected to the second support 230, which is conducive to improving the structural strength of the first support 220, the cooling member 211 and the cover 212.

[0343] In some embodiments, the cover 212 is provided as an integral structure, the cover 212 is connected to the second support 230, and the cover 212 covers two third openings 230a.

[0344] In some embodiments, the cover 212 is provided as two, one of which covers one of the third openings 230a, and the other of which covers the other of the third openings 230a.

[0345] In some embodiments, at least part of the cover 212 is located in the third opening 230a.

[0346] In some embodiments, along the first direction X, the projection of the third opening 230a is located within the projection of the cover 212, and the cover 212 covers the whole of the third opening 230a.

[0347] In some embodiments, along the third direction Z, the cover 212 and the first support 220 have a third gap (not labeled in the figure) less than 5mm, which facilitates the assembly of the cover 212 and reduces air escaping from the third gap.

[0348] In some embodiments, an adhesive is arranged in the third gap, which adhesively connects the cover 212 and the first support 220, further reducing air escaping from the third gap.

[0349] In some embodiments, along the second direction Y, the cover 212 and the second support 230 have a fourth gap (not labeled in the figure) less than 5mm, which facilitates the assembly of the cover 212 and reduces air escaping from the fourth gap.

[0350] In some embodiments, an adhesive is arranged in the fourth gap, which adhesively connects the cover 212 and the second support 230, further reducing air escaping from the fourth gap.

[0351] In some embodiments, along the first direction X, the second support 230 is connected to the side of the first support 220 away from the cooling member 211. The second support 230 can protect the first support 220, for example, during transportation or assembly, the second support 230 can contact external handling equipment, reducing the stress on the first support 220, the battery module 20 and the cooling member 211.

[0352] Please refer to FIG. 30, in some embodiments, the energy storage device 100 includes at least two second supports 230, one of which, together with the first support 221, the second support 222 and the cooling member 211, forms the first opening 201 of the refrigerant channel. The other second support 230, together with the first support 221, the second support 222 and the cooling member 211, forms the second opening 202 of the refrigerant channel.

[0353] In some embodiments, the energy storage device 100 includes two second supports 230 arranged along the second direction Y, which are connected to the first support 220 to form a third opening 230a.

[0354] In some embodiments, the energy storage device 100 includes three second supports 230 arranged along the second direction Y, which are connected to the first support 220 to form two third openings 230a.

[0355] Referring to FIG. 31 and FIG. 32, in some embodiments, the cover 212 does not exceed the second support 230 along the first direction X. Along the first direction X, the second support 230 is the outermost, and the second support 230 can protect the cover 212. During transportation or assembly, external handling equipment can act on the second support 230, support the weight of the battery module 20, the cooling member 211 and the first support 220 through the second support 230, reduce the stress of the first support 220, the battery module 20 and the cooling member 211, and reduce the risk of deformation of the cooling member 211 caused by stress.

[0356] In some embodiments, the cover 212 abuts against the first support 220, reduces the gap between the cover 212 and the first support 220, and improves heat dissipation.

[0357] In some embodiments, the cover 212 abuts against the second support 230, reduces the gap between the cover 212 and the second support 230, and improves heat dissipation.

[0358] In some embodiments, the cover 212 abuts against the first support 220 and the second support 230, reduces the gap between the cover 212 and the first support 220 and reduces the gap between the cover 212 and the second support 230, and further improves heat dissipation.

[0359] In some embodiments, the thermal conductivity of the cover 212 is less than 0.5 W / m·K, which can reduce the heat exchange between the air in the refrigerant channel 20a and the outside of the energy storage module.

[0360] Referring to FIG. 29, FIG. 30 and FIG. 35, in some embodiments, the cooling assembly 21 includes fins 60. The fins 60 are located between the cooling member 211 and the cover 212. The fins 60 divide the refrigerant channel 20a into multiple sub-channels.

[0361] In some embodiments, at least part of the fins 60 is arranged in the refrigerant channel 20a. The fins 60 are connected to the cooling member 211, and the fins 60 include an air inlet opening 60a and an air outlet opening 60b, which are separated. The air outside the energy storage device 100 flows in the refrigerant channel 20a in the sub-channels through the air inlet opening 60a and the air outlet opening 60b. The fins 60 can increase the contact area of the air in the refrigerant channel 20a with the cooling member 211, and the heat of the air in the refrigerant channel 20a is transferred to the cooling member 211 through the fins 60, which is conducive to heat dissipation.

[0362] In some embodiments, the fins 60 are in contact with the cooling member 211.

[0363] In some embodiments, the fins 60 are connected to the cooling member 211 by a thermally conductive adhesive.

[0364] In some embodiments, the fins 60 are fixed to the cooling member 211. The fixing methods include, but are not limited to, welding, clamping, and screwing.

[0365] In some embodiments, the second support 230 protrudes the fins 60 in the first direction X, reducing the stress on the fins 60.

[0366] Referring to FIG. 35, in some embodiments, the fins 60 include first sub-channels 61 and second sub-channels 62 arranged at intervals. The first sub-channels 61 communicate the air inlet openings 60a and the air outlet openings 60b. The second sub-channels 62 communicate the air inlet openings 60a and the air outlet openings 60b.

[0367] In some embodiments, the first sub-channels 61 include third openings 620 facing the cover member 212, and the cover member 212 covers the third openings 620 in the first direction X.

[0368] In some embodiments, the second sub-channels 62 include fourth openings 630 facing the cooling member 211, and the cooling member 211 covers the fourth openings 630. The air in the refrigerant channel 20a can directly contact the cooling member 211 through the fourth openings 630, facilitating heat dissipation.

[0369] In some embodiments, the third openings 620 are arranged extending in the second direction Y. The fourth openings 630 are arranged extending in the second direction Y.

[0370] In some embodiments, the cover member 212 includes at least one of foam, polyurethane, epoxy resin, aerogel, and foaming glue. The cover member 212 can seal the refrigerant channel 20a, allowing air to flow in the extension direction of the refrigerant channel 20a. When external humid air enters the refrigerant channel 20a, the humid air contacts the fins 60 or the cooling member 211, forming condensate water. The cover member 212 can reduce the contact between the external humid air and the fins 60 and absorb part of the condensate water.

[0371] Referring to FIGS. 24, 33, and 34, in some embodiments, the energy storage device 100 includes a plurality of third supports 70 arranged on the side of the cooling member 211 away from the first support 220. The battery module 20 is arranged between the two third supports 70. The battery module 20 is connected to the two third supports 70. The two third supports 70 can limit the movement of the battery module 20.

[0372] In some embodiments, referring to FIG. 24, the battery module 20 includes a plurality of cell groups 20d arranged along a third direction Z, each of the cell groups 20d including at least two cells 22 arranged along a second direction Y. The energy storage device 100 includes a plurality of first side covers 80, each of the cell groups 20d being disposed between two of the first side covers 80 along the second direction Y. Each of the cell groups 20d and the two first side covers 80 are fixed. The first side covers 80 are each fixed to the third support 70.

[0373] In some embodiments, the two third supports 70 are fixedly connected to the first cooling member 211, and the plurality of cells 22 are disposed between the two third supports 70. The third support 70 can limit the position of the battery module 20 along the second direction Y.

[0374] In some embodiments, the battery module 20 includes a plurality of cells 22 arranged along the second direction Y. The energy storage device 100 includes two first side covers 80 spaced apart along the second direction Y. The battery module 20 is disposed between the two first side covers 80 along the second direction Y. The battery module 20 and the two first side covers 80 are fixed. The two first side covers 80 are fixed to the third support 70.

[0375] In some embodiments, the third support 70 includes a second top wall 71 facing away from the cooling member 211. The first side cover 80 is fixed to the second top wall 71. When the cell 22 expands, the expansion force received by the first side cover 80 can be transmitted to the third support 70 through the second top wall 71, reducing the expansion force received by the first side cover 80.

[0376] Referring to FIG. 24, in some embodiments, the two third supports 70 are each provided with a connecting recess 70a, and the first side cover 80 is provided with a connecting protrusion 80a. The connecting protrusion 80a is arranged in the connecting recess 70a, so that the first side cover 80 is fixedly connected to the third support 70.

[0377] In some embodiments, along the first direction X, the cooling member 211 is located between the battery module 20 and the cover 212, which is conducive to balancing the temperature of the plurality of cells 22.

[0378] Referring to FIG. 24, in some embodiments, the battery module 20 includes an outer shell 240, and the outer shell 240 and the cooling member 211 form a second containing space 240a, and the battery module 20 is arranged in the second containing space 240a.

[0379] In some embodiments, the energy storage device 100 of the present application can be, but is not limited to, a backup power supply, a large battery module, etc.

[0380] Those skilled in the art should know that the above-mentioned embodiments are only used to illustrate the present application, but not as a limitation to the present application, as long as the appropriate changes and variations of the above-mentioned embodiments are within the scope of the present application.

Claims

1. An energy storage device, characterized by, The energy storage device comprises: a first housing; a plurality of battery modules arranged in the first housing, the plurality of battery modules being arranged in a first direction; a refrigerant passage at least partially located between adjacent battery modules; a liquid cooling unit and at least one cooling component, the battery modules and the cooling component being arranged in the first direction, the cooling component comprising a first flow channel, the liquid cooling unit being connected to the first flow channel; a first fan configured to drive a first refrigerant to flow in the refrigerant passage.

2. The energy storage device of claim 1, wherein, The first housing comprises a first wall; a heat exchange member, the first wall and the heat exchange member being oppositely arranged in a second direction; in the second direction, a first gap is present between the plurality of battery modules and the first wall, and a second gap is present between the plurality of battery modules and the heat exchange member, the refrigerant passage being in communication with the first gap and the second gap, the first direction being perpendicular to the second direction; the first fan is arranged in the first housing, and the first fan is configured to drive the first refrigerant to flow between the first gap, the second gap, and the refrigerant passage.

3. The energy storage device of claim 2, wherein, in the second direction, the first housing comprises a first housing opening oppositely arranged with the first wall, and the heat exchange member at least partially closes the first housing opening.

4. The energy storage device of claim 2 or 3, wherein, The energy storage device comprises a first partition; the first partition divides the first housing into a first chamber and a second chamber arranged in the first direction, and the plurality of battery modules are located in one of the first chamber and the second chamber.

5. The energy storage device of claim 4, wherein, The first housing comprises a first passage between the plurality of battery modules and the first partition, and the first fan is arranged in the first passage; the first fan is configured to drive the first refrigerant to flow in the refrigerant passage, the first gap, the second gap, and the first passage. The first passage comprises a first passage inlet and a first passage outlet, and the first passage inlet is in communication with the first gap; 6. The energy storage device of claim 5, wherein, in the first direction, the first passage outlet is farther away from the plurality of battery modules than the first passage inlet. The energy storage device comprises a second partition located in the first chamber; 7. The energy storage device of claim 6, wherein, the second partition and the first partition are arranged in the first direction, the first partition and the second partition are part of the first passage, and the first partition and the second partition are part of the first passage outlet. The energy storage device comprises an electrical module electrically connected to the battery modules, and the electrical module is located in the other one of the first chamber and the second chamber.

8. The energy storage device of any one of claims 5 to 7, wherein, The liquid cooling unit comprises a driving device and a pipeline; 9. The energy storage device of claim 8, wherein, the driving device is located in the other one of the first chamber and the second chamber, the plurality of battery modules, the electrical module, and the driving device are arranged in the first direction; part of the pipeline is located in the first chamber, and the pipeline connects the driving device and the first flow channel. ​ 10. The energy storage device of any one of claims 5 to 9, wherein, The energy storage device comprises a second shell, which is arranged in the first shell, the second shell and the first partition serve as partial components of the first space, and the first space is isolated from the outside of the first space; The plurality of battery modules are arranged in the first space.

11. The energy storage device of claim 10, wherein, The energy storage device comprises a first opening and a second opening arranged opposite to each other along the second direction, the first opening and the second opening are formed by the second shell and the first partition, and the heat exchange component encloses at least part of the second opening; The first wall encloses the first opening, or the energy storage device comprises a first connecting wall, and the first connecting wall encloses the first opening.

12. The energy storage device of claim 11, wherein, The second shell comprises a first side wall, a second side wall, and a second shell top wall; The second shell top wall and the first partition are arranged along the first direction, the second shell top wall connects the first side wall and the second side wall, and the first partition connects the first side wall and the second side wall; The first side wall, the second side wall, the second shell top wall, and the first partition form the first opening and the second opening; The heat exchange component connects the first side wall, the second side wall, the second shell top wall, and the first partition, and encloses the second opening; The first connecting wall connects the first side wall, the second side wall, the second shell top wall, and the first partition, and encloses the first opening; or the first wall connects the first side wall, the second side wall, the second shell top wall, and the first partition, and encloses the first opening.

13. The energy storage device of any one of claims 10 to 12, wherein, The first fan is located in the first space.

14. The energy storage device of any one of claims 9 to 13, wherein, The heat exchange component comprises a first heat exchange channel and a second heat exchange channel arranged in a partitioned manner, the first heat exchange channel communicates with the refrigerant channel, and the second heat exchange channel is configured to provide a flow path for the second refrigerant.

15. The energy storage device of claim 14, wherein, The second heat exchange channel communicates with the outside of the energy storage device, the second heat exchange channel is configured to flow air outside the energy storage device in the second heat exchange channel, and the second refrigerant comprises air outside the energy storage device.

16. The energy storage device of claim 14 or 15, wherein, The first heat exchange channel comprises a first end and a second end arranged along the first direction, the first end is enclosed, and the second end communicates with the first channel; The first heat exchange channel comprises the first heat exchange opening, and the first heat exchange opening and the second gap communicate.

17. The energy storage device of claim 16, wherein, The second heat exchange channel comprises a third end and a fourth end arranged along the first direction, the second heat exchange channel extends along the first direction, the third end is configured to pass the second refrigerant, and the fourth end is enclosed; The second heat exchange channel comprises a second heat exchange opening configured to pass the second refrigerant.

18. The energy storage device of claim 16 or 17, wherein, The heat exchange component comprises a fixed plate and a heat exchange component; The heat exchange component and the fixed plate are arranged along the second direction, the fixed plate is provided with an inlet and an outlet, and the second heat exchange channel communicates the inlet and the outlet.

19. The energy storage device of claim 18, wherein, The heat exchange component comprises a second fan; The second fan is fixed to the fixed plate, and is configured to drive the second refrigerant to enter the second heat exchange channel from the inlet and to be discharged from the outlet.

20. The energy storage device of claim 19, wherein, The heat exchange member comprises a frame connected to the fixed plate, and the frame is arranged in the second housing. The heat exchange member is arranged in the frame, and is spaced apart from the frame along the first direction and forms a connecting opening, and the first channel communicates with the connecting opening.

21. The energy storage device of claim 20, wherein, The heat exchange member comprises a first baffle connected to the frame. The first heat exchange channel comprises a first section located between the first baffle and the fixed plate along the second direction, and the first baffle covers the first section. Along the second direction, the projection of the first section overlaps the projection of the first channel, and the projection of the first section is separated from the projection of the battery module.

22. The energy storage device of claim 21, wherein, The heat exchange member comprises a second baffle connected to the frame, and the second fan is located between the second baffle and the fixed plate along the second direction. Along the second direction, the projection of the second baffle is separated from the projection of the refrigerant channel, and the projection of the second baffle is connected to or partially overlaps the projection of the heat exchange member.

23. The energy storage device of any one of claims 1 to 22, wherein, The cooling assembly comprises a cooling member and a cover member, the cooling member comprises the first flow channel, and at least part of the refrigerant channel is located between the cooling member and the cover member.

24. The energy storage device of any one of claims 2 to 22, wherein, The cooling assembly comprises fins located in the refrigerant channel, the fins separate the refrigerant channel into a plurality of sub-channels, and the sub-channels communicate the first gap and the second gap.

25. The energy storage device of any one of claims 1 to 22, wherein, The battery module comprises a first top wall, the first top wall and the cooling assembly are spaced apart, and the cooling assembly and the first top wall form the refrigerant channel. Alternatively, the battery module comprises a first bottom wall arranged opposite to the first top wall along the first direction, and the cooling assembly and the first bottom wall form the refrigerant channel.

26. The energy storage device of claim 23 or 24, wherein, The cooling assembly comprises: A first support that supports the battery module; The cooling member, the first support and the cover member serve as at least part of the components forming the refrigerant channel.

27. The energy storage device of claim 26, wherein, The first support comprises a first support member and a second support member spaced apart; The first support member is fixed to the cooling member, and the second support member is fixed to the cooling member.

28. The energy storage device of claim 27, wherein the carbon nanotube is a single- walled carbon nanotube. The energy storage device comprises at least one second support, the second support, the first support member and the second support member form at least one third opening; The cover member covers the third opening.

29. The energy storage device of claim 28, wherein, At least part of the cover member is located in the third opening.

30. The energy storage device of claim 28 or 29, wherein, Along the first direction, the second support is connected to the side of the first support away from the cooling member.

31. The energy storage device of any one of claims 28 to 30, wherein, The refrigerant channel comprises a refrigerant channel first opening and a refrigerant channel second opening; The energy storage device comprises at least two second supports, one of the second supports, the first support member, the second support member and the cooling member form the refrigerant channel first opening, and the other of the second supports, the first support member, the second support member and the cooling member form the refrigerant channel second opening.

32. The energy storage device of any one of claims 28 to 31, wherein, In the first direction, the cover does not exceed the second support.

33. The energy storage device of any one of claims 28 to 32, wherein, The cover abuts against the first support, and / or the cover abuts against the second support.

34. The energy storage device as described in claim 27, characterized in that, The refrigerant channel comprises a refrigerant channel first opening and a refrigerant channel second opening. The first support, the second support, the cover, and the cooling member form the refrigerant channel first opening and the refrigerant channel second opening.

35. The energy storage device of claim 23, wherein, The thermal conductivity of the cover is less than 0.5 W / m·K.

36. The energy storage device of claim 35, wherein, The cover comprises at least one of foam, polyurethane, epoxy resin, aerogel, and foaming glue.

37. The energy storage device of claim 26 or 27, wherein, The energy storage device comprises a plurality of third supports, which are arranged on the side of the cooling assembly away from the first support. The battery module is arranged between two third supports, and the battery module is connected to the two third supports.

38. The energy storage device of claim 37, wherein, The battery module comprises a plurality of cell groups arranged in a third direction, and each cell group comprises at least two cells arranged in a second direction. The energy storage device comprises a plurality of first side covers, and in the second direction, the cell group is arranged between two first side covers, and the cell group and the two first side covers are fixed. The first side cover is fixed to the third support.

39. The energy storage device of claim 38, wherein, In the first direction, the third support comprises a second top wall facing away from the cooling member, and the first side cover is fixed to the second top wall.

Images