Energy storage device

Abstract

The present application discloses an energy storage device, comprising a first housing, a first separator, a battery module, and an electrical module. The first separator is connected to the first housing, and the first separator divides the first housing into a first chamber and a second chamber arranged in a first direction. The battery module is located in one of the first chamber and the second chamber. The electrical module is located in the other one of the first chamber and the second chamber, and the electrical module is electrically connected to the battery module. The electrical module and the battery module are located in different chambers, so that heat generated by the electrical module is separated from heat generated by the battery module, thereby facilitating improvement of heat dissipation of the battery module.

Description

Energy storage device TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage, and in particular to an energy storage device. BACKGROUND

[0002] At present, the energy storage device is widely applied in the field of intelligent energy storage device, and the energy storage device needs to dissipate heat when generating a large amount of heat.

[0003] SUMMARY

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

[0005] Embodiments of the present application provide an energy storage device, which comprises a first shell, a first partition, a battery module and an electrical module. The first partition is connected to the first shell, and the first partition divides the first shell into a first chamber and a second chamber arranged along a first direction. The battery module is located in one of the first chamber and the second chamber. The electrical module is located in the other of the first chamber and the second chamber, and the electrical module is electrically connected to the battery module. By locating the electrical module and the battery module in different chambers, the heat generated by the electrical module and the heat generated by the battery module are isolated, which is conducive to improving the heat dissipation of the battery module.

[0006] In one or more optional embodiments above, the energy storage device comprises a liquid cooling unit, and the liquid cooling unit comprises a driving device. The driving device is located in the other of the first chamber and the second chamber, and the battery module, the electrical module and the driving device are arranged along the first direction.

[0007] In one or more optional embodiments above, the energy storage device comprises a first fan, and the first fan and the battery module are located in the first chamber. The first fan is configured to drive the first coolant to flow in the first chamber, which is conducive to heat dissipation. Alternatively, the first fan and the battery module are located in the second chamber, and the first fan is configured to drive the first coolant to flow in the second chamber, which is conducive to heat dissipation.

[0008] In one or more optional embodiments above, the energy storage device comprises a second shell, and the second shell is arranged in the first shell. The second shell and the first partition are part components for forming a first space, and the battery module is arranged in the first space. The first space is isolated from the outside of 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.

[0009] In one or more optional embodiments above, the second housing includes a first opening and a second opening oppositely arranged along a second direction, the first opening and the second opening being formed by the second housing and the first partition, the first direction being perpendicular to the second direction. The energy storage device includes a heat exchange member, the heat exchange member enclosing at least a portion of the second opening. The first housing includes a first wall, the first wall enclosing the first opening; or, the energy storage device includes a first connecting wall, the first connecting wall enclosing the first opening.

[0010] 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 are arranged along a first direction, the second housing top wall connecting 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 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, 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, 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, and encloses the first opening, such that the first coolant in the first space is isolated from a space outside the first space.

[0011] In one or more optional embodiments above, the energy storage device includes a first channel between the battery module and the first partition, and a first fan in the first channel, the first fan being configured to drive the first coolant.

[0012] In one or more optional embodiments above, the energy storage device includes a second partition, the second partition and the first partition being spaced apart along the first direction, the first partition and the second partition being configured as part of the first channel.

[0013] In one or more optional embodiments above, the first partition includes a first horizontal portion and a first bent portion, the first bent portion extending away from the battery module. The second partition includes a second horizontal portion and a second bent portion, the second bent portion extending away from the battery module. The first bent portion and the second bent portion are configured to direct the first coolant to flow away from the battery module, to reduce the first coolant flowing directly to the heat exchange member along the second direction, and to reduce the first coolant flowing along the first channel toward the first channel inlet after colliding with the heat exchange member.

[0014] In one or more optional embodiments above, the first partition includes a first horizontal portion and a first bent portion, the first bent portion extending away from the battery module. The second partition includes a second bent portion, the second bent portion extending away from the battery module. The first bent portion and the second bent portion are configured to direct the first coolant to flow away from the battery module, to reduce the first coolant flowing directly to the heat exchange member along the second direction, and to reduce the first coolant flowing along the first channel toward the first channel inlet after colliding with the heat exchange member.

[0015] In one or more optional embodiments above, the energy storage device includes at least one cooling assembly, the battery module and the cooling assembly are arranged along a first direction, and the cooling assembly includes a first flow channel. The liquid cooling unit includes a pipe, a portion of the pipe is located in the first chamber, a portion of the pipe is located in the second chamber, and the pipe connects the first flow channel and the driving device.

[0016] In one or more optional embodiments above, the cooling assembly includes a refrigerant passage, and a gap exists between the battery module and the first housing, the gap connects the first passage and the refrigerant passage.

[0017] In one or more optional embodiments above, the gap includes a first gap and a second gap, the first gap and the second gap are located on two sides of the battery module along a second direction, and the first direction is perpendicular to the second direction. The refrigerant passage connects the first gap and the second gap, and the first passage connects the first gap and the second gap.

[0018] In one or more optional embodiments above, the refrigerant passage includes a refrigerant passage first opening and a refrigerant passage second opening, the refrigerant passage second opening and the refrigerant passage first opening are arranged along a second direction, and the first direction is perpendicular to the first direction.

[0019] In one or more optional embodiments above, the cooling assembly includes a cooling member and a cover member, the battery module is connected to the cooling member, and the battery module and the cooling member are arranged along a first direction. The cooling member includes a first flow channel, and the refrigerant passage is located between the cooling member and the cover member.

[0020] In one or more optional embodiments above, the cooling assembly includes a first support, the first support supports the battery module, and the cooling member, the first support, and the cover member serve as at least part of the members forming the refrigerant passage.

[0021] In one or more optional embodiments above, the first support includes a first support member and a second support member arranged at intervals. The first support member is fixed to the cooling member, and the second support member is fixed to the cooling member.

[0022] In one or more optional embodiments above, the cooling assembly 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. The cover member covers the third opening, reduces the situation that air flows out of the refrigerant passage through the third opening, and causes the heat dissipation effect to be reduced.

[0023] In one or more optional embodiments above, at least a portion of the cover member is located in the third opening, which reduces the situation that air flows out of the refrigerant passage through the third opening, and causes the heat dissipation effect to be reduced.

[0024] In one or more optional embodiments above, the second support is connected to the first support on the side of the first support away from the cooling member in the first direction. The second support can protect the first support, and the second support can be contacted by an external handling device during transportation or assembly, reducing the stress on the first support, the battery module, and the cooling member.

[0025] In one or more optional embodiments above, the cover does not extend beyond the second support in the first direction. The second support is the outermost in the first direction, and the second support can protect the cover. During transportation or assembly, an external handling device 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.

[0026] In one or more optional embodiments above, the cooling assembly includes at least two second supports, one of which, the first support, the second support, and the cooling member form a second opening of the refrigerant channel, and the other, the first support, the second support, and the cooling member form a first opening of the refrigerant channel.

[0027] 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.

[0028] 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.

[0029] In one or more optional embodiments above, the cover abuts the first support and the second support, reducing the gap between the cover and the first support and the gap between the cover and the second support, further improving heat dissipation.

[0030] In one or more optional embodiments above, the cooling assembly includes fins between the cooling member and the cover, and the fins divide the refrigerant channel into multiple sub-channels. The fins can increase the contact area between the air in the refrigerant channel and the cooling member, and the heat of the air in the refrigerant channel is transferred to the cooling member through the fins, which is conducive to heat dissipation.

[0031] 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 air in the refrigerant channel and the outside of the energy storage module.

[0032] In one or more optional embodiments above, the cover includes at least one of foam, polyurethane, epoxy resin, aerogel, and foaming glue.

[0033] In one or more optional embodiments above, the battery module includes a plurality of cell groups arranged along a third direction. Each cell group includes at least two cells arranged along a second direction. The energy storage device includes a plurality of first side covers. Along the second direction, the cell group is disposed between two first side covers, and the cell group and the two first side covers are fixed. The first side cover is fixedly connected to the two third supports.

[0034] In one or more optional embodiments above, along the first direction, the third support includes a top wall facing away from the cooling member, and the first side cover is fixed to the top wall. When the cell expands, the expansion force received by the first side cover can be transmitted to the third support through the top wall, reducing the expansion force received by the first side cover.

[0035] In one or more optional embodiments above, the energy storage device includes a heat exchange member, and the heat exchange member includes a first heat exchange channel and a second heat exchange channel arranged separately. The first heat exchange channel is in communication with the refrigerant channel, and the second heat exchange channel is configured to provide a flow path for the second refrigerant.

[0036] In one or more optional embodiments above, the second heat exchange channel is in communication with the outside of the energy storage device, and the second heat exchange channel is configured to flow air outside the energy storage device in the second heat exchange channel. The second refrigerant includes air outside the energy storage device.

[0037] In one or more optional embodiments above, the first heat exchange channel 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 channel. The first heat exchange channel includes a first heat exchange opening 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 outside environment, which is conducive to heat dissipation.

[0038] In one or more optional embodiments above, the second heat exchange channel includes 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 closed. The second heat exchange channel includes a second heat exchange opening configured to pass the second refrigerant. This can reduce the flow of air from the outside into the second housing through the fourth end, which is conducive to heat dissipation.

[0039] The above energy storage device separates the heat generated by the electrical module and the heat generated by the battery module by locating them in different chambers, which is conducive to improving the heat dissipation of the battery module. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 shows a structural schematic diagram of an energy storage device in some embodiments.

[0041] Figure 2 shows an exploded schematic diagram of an energy storage device in some embodiments.

[0042] Figure 3 shows a cross-sectional view of the energy storage device of Figure 1 along A-A.

[0043] Figure 4 shows a close-up view of part of Figure 3.

[0044] Figure 5 shows a schematic view of Figure 3.

[0045] Figure 6 shows a schematic view of Figure 3 from another perspective.

[0046] Figure 7 shows a schematic view of an energy storage device in another embodiment.

[0047] Figure 8 shows a schematic view of the embodiment of Figure 3.

[0048] Figure 9 shows a schematic view of the embodiment of Figure 7.

[0049] Figure 10 shows a schematic view of another embodiment.

[0050] Figure 11 shows an exploded view of an energy storage device in another embodiment.

[0051] Figure 12 shows a structural view of part of an energy storage device in some embodiments.

[0052] Figure 13 shows an exploded view of part of the energy storage device of Figure 12.

[0053] Figure 14 shows a structural view of part of the energy storage device of Figure 12 from another perspective.

[0054] Figure 15 shows a structural view of part of the energy storage device of Figure 12.

[0055] Figure 16 shows a cross-sectional view of part of an energy storage device in some embodiments.

[0056] Figure 17 shows a structural view of a heat exchange element in some embodiments.

[0057] Figure 18 shows a structural view of a heat exchange element in some embodiments from another perspective.

[0058] Figure 19 shows a cross-sectional view of a heat exchange element in some embodiments.

[0059] Figure 20 shows a structural view of part of a heat exchange element in some embodiments.

[0060] Figure 21 shows a structural view of part of a heat exchange element in some embodiments.

[0061] Figure 22 shows an exploded view of a battery module and cooling assembly in some embodiments.

[0062] Figure 23 shows a cross-sectional view of part of a cooling assembly in some embodiments.

[0063] Fig. 24 shows a partially enlarged view of Fig. 23.

[0064] Fig. 25 shows a structural view of a cooling assembly, a first bracket, and a second bracket in some embodiments.

[0065] Fig. 26 shows an exploded view of the cooling assembly, the first bracket, and the second bracket in Fig. 25.

[0066] Fig. 27 shows a structural view of a cooling assembly, a first bracket, a second bracket, and a third bracket in some embodiments.

[0067] Fig. 28 shows an exploded view of the cooling assembly, the first bracket, the second bracket, and the third bracket in Fig. 27.

[0068] Fig. 29 shows a structural view of a cooling assembly, a first bracket, a second bracket, and a third bracket in some embodiments.

[0069] Fig. 30 shows a structural view of a cooling assembly, a first bracket, a second bracket, and a third bracket in another perspective in some embodiments.

[0070] Fig. 31 shows a structural view of a battery module and a cooling assembly in some embodiments.

[0071] Fig. 32 shows a partially enlarged view of a battery module and a cooling assembly in Fig. 31.

[0072] Explanation of main element symbols:

[0073] Energy storage device 100

[0074] Pressure relief portion 100a

[0075] First gap 101

[0076] Second gap 102

[0077] First housing 10

[0078] First housing opening 10a

[0079] Accommodation space 10a1

[0080] Second housing opening 10b

[0081] First chamber 10c

[0082] Second chamber 10d

[0083] First receiving chamber 10e

[0084] Second receiving chamber 10f

[0085] First wall 11

[0086] Second wall 12

[0087] Third wall 13

[0088] First housing top wall 14

[0089] First top wall opening 141

[0090] First housing bottom wall 15

[0091] Fourth wall 16

[0092] First beam 17

[0093] Second beam 18

[0094] Support plate 19

[0095] Battery module 20

[0096] Refrigerant channel 20a

[0097] Refrigerant channel first opening 201

[0098] coolant passage second opening 202

[0099] cooling assembly 21

[0100] cooling member 211

[0101] second space 211a

[0102] first cooling member 2111

[0103] second cooling member 2112

[0104] flow passage inlet 2113

[0105] flow passage outlet 2114

[0106] cover member 212

[0107] first support 220

[0108] first support member 221

[0109] second support member 222

[0110] third support member 223

[0111] second support 230

[0112] third opening 230a

[0113] housing 240

[0114] second accommodation space 240a

[0115] first flow channel 21a

[0116] battery cell group 20d

[0117] battery cell 22

[0118] heat exchange member 30

[0119] first heat exchange channel 30a

[0120] first end 301

[0121] second end 302

[0122] first heat exchange opening 310

[0123] second heat exchange channel 30b

[0124] third end 303

[0125] fourth end 304

[0126] connection port 30c

[0127] second heat exchange opening 320

[0128] first section 330

[0129] fixing plate 31

[0130] inlet 311

[0131] outlet 312

[0132] Heat exchange member 32

[0133] Frame 33

[0134] First baffle 34

[0135] Third fan 35

[0136] Second baffle 36

[0137] First fan 40

[0138] Second housing 50

[0139] First opening 50a

[0140] Second opening 50b

[0141] First channel 50c

[0142] First channel inlet 50c1

[0143] First channel outlet 50c2

[0144] First space 501

[0145] First side wall 51

[0146] Second side wall 52

[0147] Second housing top wall 54

[0148] Second top wall opening 541

[0149] First protrusion 542

[0150] Fin 60

[0151] Third bracket 70

[0152] Connecting recess 70a

[0153] Top wall 71

[0154] First side cover 80

[0155] Connecting protrusion 80a

[0156] First partition 103

[0157] First horizontal portion 1031

[0158] First bent portion 1032

[0159] Electrical module 104

[0160] Second partition 105

[0161] Second horizontal portion 1051

[0162] Second bent portion 1052

[0163] Liquid cooling unit 110

[0164] Pipe 110a

[0165] Inflow pipe 110a1

[0166] outflow pipe 110a2

[0167] drive device 110b

[0168] first connection wall 120

[0169] shielding plate 130

[0170] through hole 130a

[0171] first fin 140

[0172] first direction X

[0173] second direction Y

[0174] third direction Z

[0175] The following detailed embodiments will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0176] The following detailed description is exemplary and not limiting, and is intended to provide a basic understanding of the application, and is not intended to identify key or critical elements or limit the scope of the claimed scope. As long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way.

[0177] When a component is considered to be "provided on" another component, it can be directly provided on the other component or a middle component can be present at the same time. When a component is considered to be "connected" to another component, it can be directly connected to the other component or a middle component can be present at the same time.

[0178] It can be understood that the term "perpendicular" is used to describe the ideal state between two components. In the actual production or use state, there can be a state close to or equal to the state between the two components. For example, in combination with numerical description, perpendicular can refer to the included angle between two straight lines in the range of 90°±10°, perpendicular can also refer to the dihedral angle between two planes in the range of 90°±10°, and perpendicular can also refer to the included angle between a straight line and a plane in the range of 90°±10°. The two components described as "perpendicular" can not be absolute straight lines, planes, and can be approximately straight lines or planes, and the overall extension direction is considered to be a "straight line" or a "plane" from a macroscopic point of view.

[0179] The terms "perpendicular", "horizontal", "left", "right", "top", "bottom", "front", "back" and similar expressions used herein are for illustrative purposes only and are not intended to limit the present application.

[0180] Unless otherwise defined, the term "a plurality of" used herein to describe the number of components specifically refers to two or more of the components.

[0181] Embodiments of the present application provide an energy storage device, comprising a first housing, a first partition, a battery module and an electrical module. The first partition is connected to the first housing, and the first partition divides the first housing into a first chamber and a second chamber arranged along a first direction. The battery module is located in one of the first chamber and the second chamber. The electrical module is located in the other of the first chamber and the second chamber, and the electrical module is electrically connected to the battery module. By locating the electrical module and the battery module in different chambers, the heat generated by the electrical module and the heat generated by the battery module are isolated, which is beneficial to improve the heat dissipation of the battery module.

[0182] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments and features in the embodiments can be combined with each other without conflict.

[0183] Please refer to FIGS. 1-3, an embodiment of the present application provides an energy storage device 100, comprising a first housing 10 and a battery module 20.

[0184] In some embodiments, the energy storage device 100 comprises a first partition 103 connected to the first housing 10. The first partition 103 divides the first housing 10 into a first chamber 10c and a second chamber 10d arranged along a first direction X. The battery module 20 is located in one of the first chamber 10c and the second chamber 10d.

[0185] In some embodiments, the energy storage device 100 comprises one battery module 20, and the battery module 20 is located in one of the first chamber 10c and the second chamber 10d.

[0186] In some embodiments, referring to FIG. 3, the energy storage device 100 includes a plurality of battery modules 20, which are located in one of the first chamber 10c and the second chamber 10d. The energy storage device 100 including the plurality of battery modules 20 is taken as an example for description.

[0187] In some embodiments, the energy storage device 100 includes an electrical module 104, which is electrically connected to the battery modules 20. The electrical module 104 is located in the other one of the first chamber 10c and the second chamber 10d.

[0188] By locating the electrical module 104 and the battery modules 20 in different chambers, the heat generated by the electrical module 104 and the heat generated by the battery modules 20 are isolated, which is conducive to improving the heat dissipation of the battery modules 20.

[0189] In some embodiments, the electrical module 104 includes a battery management system (BMS), which is electrically connected to the battery modules 20 and is configured to control the charging and discharging of the battery modules 20.

[0190] In some embodiments, the electrical module 104 includes a power conversion system (PCS), which is electrically connected to the battery modules 20 and is configured to convert AC power to DC power or vice versa.

[0191] Referring to FIG. 3, in some embodiments, the energy storage device 100 includes a liquid cooling unit 110. The liquid cooling unit 110 includes a drive device 110b, which is located in the other one of the first chamber 10c and the second chamber 10d. The battery modules 20, the electrical module 104, and the drive device 110b are arranged along a first direction X.

[0192] In some embodiments, referring to FIG. 3, the first direction X is a gravity direction, 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 drive device 110b is located in the second chamber 10d.

[0193] In some embodiments, the first direction X is a gravity direction, the plurality of battery modules 20 are located in the second chamber 10d, and the electrical module 104 is located in the first chamber 10c. The drive device 110b is located in the first chamber 10c.

[0194] Referring to FIG. 22 and FIG. 26, in some embodiments, the energy storage device 100 includes at least one cooling assembly 21. The battery modules 20 and the cooling assembly 21 are arranged along the first direction X, and the cooling assembly 21 includes a first flow channel 21a. The liquid cooling unit 110 is configured to provide a flowable coolant to the first flow channel 21a.

[0195] In some embodiments, the liquid cooling unit 110 is connected to the first flow channel 21a. The liquid cooling unit 110 delivers the flowable coolant to the first flow channel 21a through the pipe. Optionally, the flowable coolant includes, but is not limited to, water, coolant, etc.

[0196] Referring to FIGS. 2 and 3, in some embodiments, the liquid cooling unit 110 includes a pipe 110a. 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 to the first flow channel 21a.

[0197] In some embodiments, the pipe 110a includes an inflow pipe 110a1 and an outflow pipe 110a2. The driving device 110b drives the flowable coolant to flow from the inflow pipe 110a1 to the first flow channel 21a and to flow from the first flow channel 21a to the outflow pipe 110a2. The flowable coolant can conduct heat away from the battery module 20 or transfer heat to the battery module 20.

[0198] Referring to FIG. 3, in some embodiments, the energy storage device 100 includes a first fan 40. The first fan 40 and the plurality of battery modules 20 are located in the first chamber 10c. The first fan 40 is configured to drive the first coolant to flow in the first chamber 10c. Optionally, the first coolant includes air.

[0199] In some embodiments, the first fan 40 and the plurality of battery modules 20 are located in the second chamber 10d. The first fan 40 is configured to drive the first coolant to flow in the second chamber 10d. Optionally, the first coolant includes air.

[0200] In some embodiments, the energy storage device 100 includes a second fan (not shown). The second fan and the electrical module 104 are located in the same chamber. The second fan is configured to drive air in the chamber to flow and dissipate heat from the electrical module 104. The second fan exchanges heat with the first partition 103 to dissipate heat from the electrical module 104.

[0201] Referring to FIG. 3, in some embodiments, the energy storage device 100 includes a first passage 50c. The first passage 50c is located between the plurality of battery modules 20 and the first partition 103. The first fan 40 is located in the first passage 50c to facilitate the first fan 40 to drive the first coolant.

[0202] In some embodiments, referring to FIG. 3, in the first direction X, the first passage 50c is located between the plurality of battery modules 20 and the first partition 103. The first passage 50c is located below the plurality of battery modules 20. In this application, FIG. 3 is used as an example for illustration.

[0203] In some embodiments, the first channel 50c is located between the battery module 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.

[0204] 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.

[0205] Referring to FIG. 3, 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 in a second direction Y, and the first direction X is perpendicular to the second direction Y.

[0206] In some embodiments, the cooling assembly 21 includes a refrigerant channel 20a. There is a gap between the battery module 20 and the first housing 10, and the gap connects the first channel 50c and the refrigerant channel 20a.

[0207] In some embodiments, the gap includes a first gap 101 and a second gap 102, and the first gap 101 and the second gap 102 are located on both sides of the battery module 20 in the second direction Y. The refrigerant channel 20a connects the first gap 101 and the second gap 102, and the first channel 50c connects the first gap 101 and the second gap 102.

[0208] In some embodiments, there is a first gap 101 between the plurality of battery modules 20 and the first wall 11 in the second direction Y, and there is a second gap 102 between the plurality of battery modules 20 and the heat exchange member 30.

[0209] In some embodiments, the first fan 40 is configured to drive the first refrigerant to flow in the refrigerant channel 20a, the first gap 101, the second gap 102, and the first channel 50c. The first refrigerant can exchange heat with the heat exchange member 30 through the heat exchange member 30, further improving heat dissipation efficiency.

[0210] Referring to FIG. 2 and FIG. 3, in some embodiments, the first housing 10 includes a first housing opening 10a opposite to the first wall 11 in the second direction Y. The heat exchange member 30 at least partially encloses the first housing opening 10a.

[0211] 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 to conduct heat of the battery module 20 to the outside.

[0212] 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. The battery module 20 is disposed between the second wall 12 and the third wall 13 along the third direction Z. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0213] 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.

[0214] 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.

[0215] 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.

[0216] In some embodiments, the first wall 11 closes the second housing opening 10b.

[0217] 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.

[0218] In some embodiments, the first partition 103 is fixedly connected to the second wall 12 and the third wall 13.

[0219] Referring to FIGS. 3 and 5, in some embodiments, the first channel 50c includes a first channel inlet 50c1 and a first channel outlet 50c2, and the first channel inlet 50c1 communicates with the first gap 101. Along the first direction X, the first channel outlet 50c2 is farther away from the plurality of battery modules than the first channel inlet 50c1. When the first refrigerant flows from the first channel inlet 50c1 to the first channel outlet 50c2, the first refrigerant is reduced to flow directly along the second direction Y to the heat exchange member 30, and the first refrigerant is reduced to flow along the first channel 50c toward the first channel inlet 50c1 after colliding with the heat exchange member 30.

[0220] Referring to FIGS. 3, 6, and 7, in some embodiments, the energy storage device 100 includes a second partition 105. The second partition 105 and the first partition 103 are spaced apart along the first direction X. The first partition 103 and the second partition 105 serve as partial components forming the first channel 50c.

[0221] In some embodiments, the first partition 103 and the second partition 105 are part of the components forming the first passage outlet 50c2.

[0222] 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 passage 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.

[0223] The present application cools the battery module 20 by the liquid cooling unit 110, drives the first coolant to flow in the coolant passage 20a by the first fan 40, cools the energy storage device 100, reduces the temperature of the battery module 20, and improves the cooling efficiency.

[0224] Referring to FIG. 5, FIG. 5 shows the flow path of the first coolant, which is air. For convenience of description, the battery module 20 and the coolant passage 20a are simplified. The first fan 40 is located in the first passage 50c, drives the air in the first gap 101 to pass through the first passage 50c, and then the air passes through the heat exchange member 30. After passing through the heat exchange member 30, the temperature of the air is lowered, the air passes through the second gap 102, enters the coolant passage 20a, and then flows to the first gap 101. The air entering the coolant passage 20a cools the battery module 20.

[0225] In some embodiments, the first fan 40 and the heat exchange member 30 are both in working state, the temperature of the first coolant is lowered by the heat exchange member 30, and the battery module 20 is cooled. The drive device 110b delivers the flowable coolant to the first flow channel 21a through the pipeline 110a, and the heat of the battery module 20 is taken away or transferred to the battery module 20 through the first flow channel 21a, so that the heat exchange member 30 cools the battery module 20. The flowable coolant has the effect of uniform temperature of the plurality of battery modules 20, and reduces the temperature difference of different battery modules 20.

[0226] 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.

[0227] 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 passage 20a.

[0228] In some embodiments, referring to FIG. 3 and FIG. 25, the liquid cooling unit 110 includes a refrigeration part (not shown), which can lower the temperature of the flowable coolant to dissipate heat from the battery module 20 through the flowable coolant. 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 to reduce the temperature difference between different battery modules 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.

[0229] Referring to FIG. 2, FIG. 3, and FIG. 12 to FIG. 15, in some embodiments, the energy storage device 100 includes a second housing 50 arranged in the first housing 10. The second housing 50 connects the first partition 103, and the second housing 50 and the first partition 103 serve as part of the first space 501 in which the battery module 20 is arranged. 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.

[0230] 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 arranged along the third direction Z, and the second housing top wall 54 and the first partition 103 are arranged along the first direction X. The second housing top wall 54 connects the first side wall 51 and the second side wall 52, and the first partition 103 connects the first side wall 51 and the second side wall 52.

[0231] 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.

[0232] 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.

[0233] Referring to FIGS. 3 and 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 guide the first coolant to flow away from the battery module 20, reduce the first coolant flowing directly to the heat exchange member 30 along the second direction Y, and reduce the first coolant flowing along the first passage 50c toward the first passage inlet 50cl after colliding with the heat exchange member 30.

[0234] 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 guide the first coolant to flow away from the battery module 20, reduce the first coolant flowing directly to the heat exchange member 30 along the second direction Y, and reduce the first coolant flowing along the first passage 50c toward the first passage inlet 50cl after colliding with the heat exchange member 30.

[0235] Referring to FIGS. 8 and 9, FIG. 8 is a schematic diagram of the embodiment of FIG. 3, and FIG. 9 is a schematic diagram of the embodiment of FIG. 7. A cooling assembly 21 is disposed on a side of the battery module 20 close to the first partition 103, and the battery module 20 is the 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.

[0236] Referring to FIG. 10, FIG. 10 is a 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 battery module 20 closest to the first partition 103. The first sidewall 51, the second sidewall 52, the first partition 103, and the second partition 105 form a first passage 50c, and the first sidewall 51, the second sidewall 52, the first partition 103, and the second partition 105 form a first passage inlet 50c1.

[0237] 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 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 battery module 20 closest to the first partition 103. The cooling assembly 21 connected to the battery module 20, the second wall 12, the third wall 13, the first partition 103, and the second partition 105 form a first passage 50c. Optionally, the cooling assembly 21 connected to the battery module 20, the second wall 12, the third wall 13, and the first partition 103 form a first passage inlet 50c1.

[0238] 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 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 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 a first passage 50c. The second wall 12, the third wall 13, the first partition 103, and the second partition 105 form a first passage inlet 50c1.

[0239] In some embodiments, the first fan 40 is located in the first space 501 to facilitate heat dissipation of the battery module 20.

[0240] Referring to FIG. 2 and FIGS. 12-15, in some embodiments, the energy storage device 100 includes a first opening 50a and a second opening 50b oppositely arranged along 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.

[0241] Referring to FIGS. 12-15, in some embodiments, the energy storage device 100 includes a first connecting wall 120. The first connecting wall 120 encloses the first opening 50a, and the heat exchange member 30 encloses at least a portion of the second opening 50b, such that the first coolant in the first space 501 is isolated from the space outside the first space 501.

[0242] In some embodiments, the first wall 11 encloses the first opening 50a, and the heat exchange member 30 encloses at least a portion of the second opening 50b, such that the first coolant in the first space 501 is isolated from the space outside the first space 501.

[0243] 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 heat dissipation of the battery module 20.

[0244] 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.

[0245] 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.

[0246] 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.

[0247] 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.

[0248] 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.

[0249] In some embodiments, the energy storage device 100 includes a pressure relief portion 100a provided on the first housing top wall 14, through which the battery module 20 is relieved when the battery module 20 is relieved.

[0250] 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 extending through the first housing top wall 14 along the first direction X. The pressure relief portion 100a encloses the first top wall opening 141.

[0251] 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 second top wall opening 541 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.

[0252] In some embodiments, the second top wall 54 is not provided with the second top wall opening 541 and other openings.

[0253] Referring to FIG. 15, in some embodiments, the energy storage device 100 comprises 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.

[0254] Referring to FIGS. 2 and 3, in some embodiments, the first housing 10 comprises 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.

[0255] 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.

[0256] Referring to FIG. 16, in some embodiments, the energy storage device 100 comprises a first fin 140 connected to the first partition 103. This facilitates heat dissipation of the electrical module 104. Optionally, the first fin 140 comprises a heat dissipation fin.

[0257] Referring to FIGS. 17 to 20, in some embodiments, the heat exchange member 30 comprises 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 comprises a liquid coolant. Optionally, the second refrigerant comprises air.

[0258] 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 100. The air outside the energy storage device 100 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.

[0259] 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 100 to flow through the second heat exchange channel 30b.

[0260] In some embodiments, the first heat exchange channel 30a and the second heat exchange channel 30b are arranged along the second direction Y.

[0261] 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.

[0262] In some embodiments, the heat exchange member 30 includes a heat exchange piece 32 arranged along 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.

[0263] 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.

[0264] In some embodiments, the first heat exchange channel 30a is one of a triangle, a quadrilateral, or an arc when viewed along the first direction X.

[0265] In some embodiments, the second heat exchange channel 30b is one of a triangle, a quadrilateral, or an arc when viewed along the first direction X.

[0266] In some embodiments, the heat exchange piece 32 includes a heat dissipation fin.

[0267] Referring to FIGS. 17-21, in some embodiments, the first heat exchange channel 30a extends along the first direction X. The first heat exchange channel 30a includes a first end 301 and a second end 302 arranged along the first direction X. The first end 301 is closed, and the second end 302 is in communication with the first channel 50c.

[0268] 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.

[0269] In some embodiments, along the second direction Y, the projection of the inlet 311 is spaced apart from the projection of the heat exchanging member 32. The air in the first channel 50c enters the first heat exchanging channel 30a from the second end 302, and flows to the refrigerant channel 20a from the first heat exchanging opening 310 via 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.

[0270] Please refer to FIG. 17 to FIG. 21. In some embodiments, the second heat exchanging channel 30b extends along the first direction X. The second heat exchanging 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 allow the second refrigerant to pass through.

[0271] In some embodiments, the second heat exchanging channel 30b includes a second heat exchanging opening 320 facing the fixed plate 31, and the first heat exchanging opening 310 and the second heat exchanging opening 320 are spaced apart along the second direction Y. The second heat exchanging opening 320 is configured to allow the second refrigerant to pass through.

[0272] In some embodiments, along the second direction Y, the projection of the outlet 312 overlaps with the projection of the heat exchanging member 32, and the second heat exchanging opening 320 communicates with the outlet 312. The air from the external environment enters the second heat exchanging channel 30b through the inlet 311 and the third end 303, and flows to the outlet 312 from the second heat exchanging opening 320, which can reduce the air flowing from the fourth end 304 into the second shell 50, and is conducive to heat dissipation.

[0273] In some embodiments, the heat exchanging member 30 includes a frame 33 connected to the fixed plate 31. The frame 33 is arranged in the second shell 50. The heat exchanging member 32 is arranged in the frame 33, and the frame 33 is spaced apart from the heat exchanging member 32 along the first direction X, and forms a connecting port 30c. The first channel 50c communicates with the connecting port 30c.

[0274] In some embodiments, along the second direction Y, part of the projection of the second partition 105 is located in the projection of the connecting port 30c, which reduces the air flowing to positions other than the first heat exchanging channel 30a, and is conducive to heat dissipation.

[0275] In some embodiments, along the second direction Y, part of the projection of the first partition 103 is located in the projection of the connecting port 30c, which further reduces the air flowing to positions other than the first heat exchanging channel 30a, and is conducive to heat dissipation.

[0276] In some embodiments, along the second direction Y, the projection of the first channel outlet 50c2 is located in the projection of the connecting port 30c, which further reduces the air flowing to positions other than the first heat exchanging channel 30a, and is conducive to heat dissipation.

[0277] In some embodiments, the heat exchange member 30 comprises a first baffle 34, the first baffle 34 connecting two second frame plates 333. In the first direction X, the first heat exchange passage 30a comprises a first section 330, the first section 330 being located between the first baffle 34 and the fixed plate 31 in the second direction Y. The first baffle 34 covers the first section 330.

[0278] In some embodiments, in the second direction Y, a projection of the first section 330 is separated from a projection of the battery module 20, and the projection of the first section 330 overlaps with a projection of the first passage 50c. The first baffle 34 limits the air flow out of the first section 330, which is conducive to heat dissipation.

[0279] In some embodiments, the heat exchange member 30 comprises a third fan 35, the third fan 35 being fixedly connected to the fixed plate 31, and the third fan 35 being configured to drive the second refrigerant to enter the second heat exchange passage 30b from the inlet 311 and to be discharged from the outlet 312.

[0280] In some embodiments, the third fan 35 and the heat exchange member 32 are arranged in the first direction X.

[0281] In some embodiments, the heat exchange member 30 comprises a second baffle 36, the second baffle 36 connecting the first frame plate 332 and the two second frame plates 333. In the second direction Y, the third fan 35 is located between the second baffle 36 and the fixed plate 31, and the second baffle 36 can block the external air from entering the first space 501, which is conducive to heat dissipation.

[0282] In some embodiments, in the second direction Y, a projection of the second baffle 36 is separated from a projection of the refrigerant passage 20a, and the projection of the second baffle 36 is connected to or partially overlaps with a projection of the heat exchange member 32, which is conducive to heat dissipation.

[0283] 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.

[0284] 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.

[0285] Referring to FIGS. 24-32, in some embodiments, the cooling assembly 21 comprises a cooling member 211 and a covering member 212, the battery module 20 being connected to the cooling member 211, and the battery module 20 and the cooling member 211 being arranged in the first direction X.

[0286] In some embodiments, the cooling member 211 comprises a first flow channel 21a, and the refrigerant passage 20a is located between the cooling member 211 and the covering member 212.

[0287] In some embodiments, other components form the refrigerant passage 20a, at least a portion of the refrigerant passage 20a is located between the cooling member 211 and the cover member 212. The other components are at least partially located between the cooling member 211 and the cover member 212. For example, a pipe forms the refrigerant passage 20a, the pipe is at least partially located between the cooling member 211 and the cover member 212.

[0288] In some embodiments, the battery module 20 contacts the cooling member 211.

[0289] In some embodiments, the battery module 20 is spaced apart from the cooling member 211. Optionally, the battery module 20 is connected to the cooling member 211 by a thermally conductive adhesive.

[0290] In some embodiments, along the first direction X, the cover member 212 is located between the cooling member 211 and the battery module 20. The battery module 20 is connected to the cooling member 211 by the cover member 212.

[0291] In some embodiments, the refrigerant passage 20a includes a refrigerant passage first opening 201 and a refrigerant passage second opening 202. The refrigerant passage 20a is in communication with the first gap 101 and the second gap 102 through the refrigerant passage first opening 201 and the refrigerant passage second opening 202.

[0292] In some embodiments, the refrigerant passage first opening 201 is an air inlet, and the refrigerant passage second opening 202 is an air outlet.

[0293] In some embodiments, the refrigerant passage second opening 202 is an air inlet, and the refrigerant passage first opening 201 is an air outlet.

[0294] In some embodiments, the refrigerant passage first opening 201 and the refrigerant passage second opening 202 are oppositely arranged along the second direction Y.

[0295] Please refer to FIG. 23 to FIG. 26. In some embodiments, the cooling member 211 includes 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.

[0296] In some embodiments, the cooling member 211 includes a flow channel inlet 2113 and a flow channel outlet 2114, and two ends of the first flow channel 21a are in communication with 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 refrigerant 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.

[0297] Referring to FIGS. 23-26, in some embodiments, the cooling assembly 21 includes a first support 220 that supports the battery module 20. The cooling member 211, the first support 220, and the cover member 212 are at least partial components that form the coolant passage 20a. Alternatively, the cooling member 211, the first support 220, and the cover member 212 form the coolant passage 20a. Alternatively, the cooling member 211, the first support 220, the cover member 212, and other partial components form the coolant passage 20a.

[0298] In some embodiments, the first support 220 includes a first support member 221 and a second support member 222 that are spaced apart along the third direction Z. 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 manner of fixation includes, but is not limited to, welding, clamping, and screwing.

[0299] In some embodiments, the first support member 221 and the second support member 222 are spaced apart along the third direction Z.

[0300] In some embodiments, the first support member 221 is fixed to the cover member 212, and the second support member 222 is fixed to the cover member 212.

[0301] 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 partial components that form the coolant passage 20a. Alternatively, the cooling member 211, the first support member 221, the second support member 222, and the cover member 212 form the coolant passage 20a. Alternatively, the cooling member 211, the first support member 221, the second support member 222, the cover member 212, and other partial components form the coolant passage 20a.

[0302] In some embodiments, the first support member 221, the second support member 222, the cooling member 211, and the cover member 212 form the coolant 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 coolant passage second opening 202.

[0303] Referring to FIG. 27, in some embodiments, the cooling assembly 21 includes a third support member 223 that 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 enhance the support of the battery module 20 and the cooling member 211.

[0304] 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, is vented, facilitates heat dissipation, and can reduce the weight of the energy storage device 100.

[0305] Referring to FIGS. 27-30, in some embodiments, the cooling assembly 21 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, which results in the situation that the heat dissipation effect is reduced. Optionally, the cover 212 covers the whole third opening 230a. Optionally, the cover 212 covers at least part of the third opening 230a. In some embodiments, referring to FIG. 28, the energy storage device 100 includes three second supports 230, the second support 230, the first support 221 and the second support 222 form two third openings 230a.

[0306] In some embodiments, the cooling assembly 21 includes two second supports 230, the second support 230, the first support 221 and the second support 222 form one third opening 230a.

[0307] In some embodiments, the cooling assembly 21 includes one second support 230, the second support 230, the first support 221 and the second support 222 form two third openings 230a.

[0308] In some embodiments, the cooling assembly 21 includes one second support 230, the second support 230, the first support 221 and the second support 222 form one third opening 230a.

[0309] 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.

[0310] 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 the two third openings 230a.

[0311] In some embodiments, the cover 212 is provided as two, one of which covers one of the third openings 230a, and the other cover 212 covers the other third opening 230a.

[0312] In some embodiments, at least part of the cover 212 is located in the third opening 230a.

[0313] 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 third opening 230a.

[0314] 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.

[0315] In some embodiments, an adhesive is arranged in the third gap to adhesively connect the cover 212 and the first support 220, further reducing air escaping from the third gap.

[0316] 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.

[0317] In some embodiments, an adhesive is arranged in the fourth gap to adhesively connect the cover 212 and the second support 230, further reducing air escaping from the fourth gap.

[0318] 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 be contacted by external handling equipment, reducing the stress on the first support 220, the battery module 20 and the cooling member 211.

[0319] In some embodiments, the cooling assembly 21 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. Another 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.

[0320] In some embodiments, the cooling assembly 21 includes two second supports 230 arranged along the second direction Y, and the two second supports 230 are connected to the first support 220 to form a third opening 230a.

[0321] In some embodiments, the cooling assembly 21 includes three second supports 230 arranged along the second direction Y, and the three second supports 230 are connected to the first support 220 to form two third openings 230a.

[0322] Referring to FIG. 29 and FIG. 30, in some embodiments, the cover 212 does not protrude beyond 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.

[0323] 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.

[0324] 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.

[0325] 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 the gap between the cover 212 and the second support 230, and further improves heat dissipation.

[0326] In some embodiments, the cover 212 has a thermal conductivity 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.

[0327] Referring to FIG. 27, FIG. 29, and FIG. 30, 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. The fins 60 can increase the contact area between the air in the refrigerant channel 20a and 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.

[0328] In some embodiments, the fins 60 contact the cooling member 211.

[0329] In some embodiments, the fins 60 are connected to the cooling member 211 by thermal conductive glue.

[0330] In some embodiments, along the first direction X, the second support 230 protrudes beyond the fins 60, reducing the stress of the fins 60.

[0331] In some embodiments, the cover 212 includes at least one of foam, polyurethane, epoxy, aerogel, foamed glue. The cover 212 can seal the refrigerant channel 20a, so that air flows along 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, and condensate water is formed. The cover 212 can reduce the contact between the external humid air and the fins 60, and absorb part of the condensate water.

[0332] Referring to FIGS. 22, 31 and 32, in some embodiments, the energy storage device 100 includes a plurality of third supports 70 disposed on the side of the cooling member 211 away from the first support 220. The battery module 20 is disposed between 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.

[0333] In some embodiments, referring to FIG. 22, the battery module 20 includes a plurality of cell groups 20d arranged along a third direction Z, and each cell group 20d includes at least two cells 22 arranged along a second direction Y. The energy storage device 100 includes a plurality of first side covers 80, and each cell group 20d is disposed between two first side covers 80 along the second direction Y. Each cell group 20d and the two first side covers 80 are fixed. The first side covers 80 are fixed to the third supports 70.

[0334] In some embodiments, the two third supports 70 are fixed to the first cooling member 2111, and a 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.

[0335] In some embodiments, the battery module 20 includes a plurality of cells 22 arranged along a 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 supports 70.

[0336] In some embodiments, the third support 70 includes a top wall 71 facing away from the cooling member 211. The first side cover 80 is fixed to the 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 top wall 71, reducing the expansion force received by the first side cover 80.

[0337] Referring to FIG. 22, 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.

[0338] In some embodiments, the cooling member 211 is located between the battery module 20 and the cover member 212 in the first direction, which facilitates the cooling member 211 to balance the temperature of the plurality of battery cells 22.

[0339] Referring to FIG. 22, in some embodiments, the battery module 20 includes a housing 240, and the housing 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.

[0340] 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.

[0341] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present application, and are not used as a limitation to the present application, and as long as the above embodiments are within the spirit and scope of the present application, any suitable changes and variations of the above embodiments are within the scope of the present application.

Claims

1. An energy storage device, characterized by, The energy storage device comprises: a first shell; a first partition connected to the first shell, the first partition dividing the first shell into a first chamber and a second chamber arranged along a first direction; a battery module located in one of the first chamber and the second chamber; an electrical module located in the other one of the first chamber and the second chamber, the electrical module being electrically connected to the battery module.

2. The energy storage device of claim 1, wherein, The energy storage device comprises a liquid cooling unit, the liquid cooling unit comprising a driving device; The driving device is located in the other one of the first chamber and the second chamber, and the battery module, the electrical module and the driving device are arranged along the first direction.

3. The energy storage device of claim 2, wherein, The energy storage device comprises a first fan, the first fan and the battery module being located in the first chamber, and the first fan being configured to drive a first coolant to flow in the first chamber; Alternatively, the first fan and the battery module are located in the second chamber, and the first fan is configured to drive a first coolant to flow in the second chamber.

4. The energy storage device of claim 3, wherein, The energy storage device comprises a second shell, the second shell being arranged in the first shell; The second shell and the first partition are part components forming a first space, and the battery module is arranged in the first space, the first space being isolated from the outside of the first space.

5. The energy storage device of claim 4, wherein, The second shell comprises a first opening and a second opening oppositely arranged along a second direction, the first opening and the second opening being formed by the second shell and the first partition, and the first direction being perpendicular to the second direction; The energy storage device comprises a heat exchange member, the heat exchange member enclosing at least part of the second opening; The first shell comprises a first wall enclosing the first opening; or the energy storage device comprises a first connecting wall enclosing the first opening.

6. The energy storage device of claim 5, 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, and the second shell top wall 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 member 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; Alternatively, 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.

7. An energy storage device as claimed in any one of claims 3 to 6, wherein, The energy storage device comprises a first channel, the first channel being located between the battery module and the first partition, and the first fan being located in the first channel.

8. The energy storage device of claim 7, wherein, The energy storage device comprises a second partition, the second partition and the first partition being spaced apart along the first direction, and the first partition and the second partition being part components forming the first channel.

9. The energy storage device of claim 7 or 8, wherein, The energy storage device comprises at least one cooling assembly, the battery modules and the cooling assembly are arranged along the first direction, and the cooling assembly comprises a first flow channel; The liquid cooling unit comprises a pipe, a part of the pipe is located in the first chamber, a part of the pipe is located in the second chamber, and the pipe connects the first flow channel and the driving device.

10. The energy storage device of claim 9, wherein, The cooling assembly comprises a refrigerant channel, and a gap exists between the battery modules and the first shell, the gap communicates the first channel and the refrigerant channel.

11. The energy storage device of claim 10, wherein, The gap comprises a first gap and a second gap, and the first gap and the second gap are located on both sides of the battery modules along a second direction, and the first direction is perpendicular to the second direction. The refrigerant channel communicates the first gap and the second gap, and the first channel communicates the first gap and the second gap.

12. The energy storage device of claim 10 or 11, wherein, The refrigerant channel comprises a refrigerant channel first opening and a refrigerant channel second opening, the refrigerant channel second opening and the refrigerant channel first opening are arranged along a second direction, and the first direction is perpendicular to the first direction.

13. The energy storage device of claim 12, wherein, The cooling assembly comprises a cooling member and a cover member, the battery modules are connected to the cooling member, and the battery modules and the cooling member are arranged along the first direction; The cooling member comprises the first flow channel, and the refrigerant channel is located between the cooling member and the cover member.

14. The energy storage device of claim 13, wherein, The cooling assembly comprises a first support, the first support supports the battery modules, and the cooling member, the first support and the cover member serve as at least part of components forming the refrigerant channel.

15. The energy storage device of claim 14, wherein, The first support comprises a first support member and a second support member arranged at intervals; The first support member is fixed to the cooling member, and the second support member is fixed to the cooling member.

16. The energy storage device of claim 15, wherein, The cooling assembly 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.

17. The energy storage device of claim 16, wherein, At least part of the cover member is located in the third opening.

18. The energy storage device of claim 16 or 17, wherein, Along the first direction, the second support is connected to the side of the first support away from the cooling member.

19. The energy storage device of any one of claims 16 to 18, wherein, The cooling assembly 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 second opening, and the other of the second supports, the first support member, the second support member and the cooling member form the refrigerant channel first opening.

20. The energy storage device of any one of claims 16 to 19, wherein, The cover member abuts against the first support, and / or the cover member abuts against the second support.

21. The energy storage device of any one of claims 13 to 20, wherein, The cooling assembly comprises fins, the fins are located between the cooling member and the cover member, and the fins divide the refrigerant channel into multiple sub-channels.

22. The energy storage device of any one of claims 13 to 21, wherein, The cover member has a thermal conductivity less than 0.5 W / m·K.

23. The energy storage device of any one of claims 13 to 22, wherein, The cover member comprises at least one of foam, polyurethane, epoxy resin, aerogel and foaming glue.

24. The energy storage device of any one of claims 10 to 23, wherein, The energy storage device comprises a heat exchange member, the heat exchange member comprises a first heat exchange channel and a second heat exchange channel arranged at intervals, the first heat exchange channel communicates the refrigerant channel, and the second heat exchange channel is configured to provide a flow path for a second refrigerant.

25. The energy storage device of claim 24, wherein, The second heat exchange passage is in communication with the outside of the energy storage device, and is configured to allow air outside the energy storage device to flow in the second heat exchange passage. The second refrigerant comprises air outside the energy storage device.

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