Electrochemical device, electric device, and method for manufacturing electrochemical device

Abstract

The application discloses an electrochemical device, an electric device and a manufacturing method of the electrochemical device. The electrochemical device comprises a first shell, an electric core assembly and a switching assembly. The electric core assembly and the switching assembly are arranged in the first shell. The electric core assembly comprises a plurality of single electric cores. The plurality of single electric cores are arranged in a stacking mode along a first direction. Each single electric core comprises an electric core shell and an electrode terminal. The electrode terminal is connected to the electric core shell. The switching assembly comprises a switching plate and a first structural member. The first structural member comprises an insulating material. The first structural member covers at least part of a surface of the switching plate. The first structural member is provided with a first channel. The first structural member is connected to at least part of the switching plate and the electrode terminal.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to an electrochemical device, an electrical device, and a method for manufacturing the electrochemical device. Background Technology

[0002] After prolonged charging and discharging, the internal temperature of an electrochemical device rises, which can affect the charging and discharging performance of the battery cells inside the device, and consequently affect the overall charging and discharging performance of the electrochemical device. Summary of the Invention

[0003] In view of the above situation, it is necessary to provide an electrochemical device that can improve the heat dissipation rate of the electrochemical device and reduce the impact of temperature rise on the charge and discharge performance of the electrochemical device.

[0004] Embodiments of this application provide an electrochemical device, including a first housing, a cell assembly, and a transfer assembly, wherein the cell assembly and the transfer assembly are disposed within the first housing. The cell assembly includes multiple individual cells stacked along a first direction. Each individual cell includes a cell housing and electrode terminals, with the electrode terminals connected to the cell housing. The transfer assembly includes a transfer plate and a first structural member. The first structural member includes an insulating material, covers at least a portion of the surface of the transfer plate, and has a first channel connecting at least a portion of the transfer plate and the electrode terminals.

[0005] In the aforementioned electrochemical device, by placing a first structural member with a first channel on at least a portion of the surface of the adapter plate and connecting the adapter plate and the electrode terminals, the heat dissipation efficiency of the first structural member can be improved, the heat exchange efficiency between the electrode terminals and the first structural member can be improved, thereby improving the heat dissipation rate of the individual battery cell, improving the heat dissipation rate of the battery cell assembly and the electrochemical device, and reducing the impact of temperature rise on the charge and discharge performance of the electrochemical device.

[0006] In some embodiments of this application, the first structural member is formed by injection molding on at least a portion of the surface of the adapter plate.

[0007] In some embodiments of this application, the first housing includes a first wall and a second wall. The first wall is provided with a first through hole, and the second wall is provided with a second through hole. A first channel connects the first through hole and the second through hole, so that the cooling material outside the first housing can pass through the first through hole, thereby improving the heat dissipation efficiency of the first structural component, thereby improving the heat dissipation rate of the single cell, and improving the heat dissipation rate of the cell assembly and electrochemical device.

[0008] In some embodiments of this application, the adapter board includes a first circuit board, the adapter assembly includes a conductive element disposed on the first circuit board, a portion of the conductive element is exposed in the first structural member, and electrode terminals are connected to the conductive element.

[0009] In some embodiments of the application, the adapter assembly includes a third through hole, the electrode terminal passes through the third through hole, and a portion of the electrode terminal is arranged on a side of the adapter plate away from the battery cell shell.

[0010] In some embodiments of the application, the electrochemical device further includes a heat conduction member connected to the first structural member and the electrode terminal, which is conducive to improving the heat exchange efficiency between the first structural member and the electrode terminal, thereby improving the heat dissipation rate of the single battery cell and the electrochemical device.

[0011] In some embodiments of the application, the heat conduction member includes potting glue.

[0012] In some embodiments of the application, the first structural member includes a plurality of first protrusions, the first channel passes through the first protrusions, the first protrusions are arranged between the adapter plate and the battery cell shell along a second direction, the third through hole is arranged between two adjacent first protrusions along a first direction, and the second direction is perpendicular to the first direction.

[0013] The plurality of first protrusions described above can play a guiding role and improve the efficiency of connecting the electrode terminal to the adapter plate.

[0014] In some embodiments of the application, the plurality of battery cells are arranged in a stack along a first direction, the first shell is provided with a second channel capable of passing a cooling medium, the adapter plate is located between the second channel and the battery cell shell along a second direction perpendicular to the first direction, the first shell has a first chamber, the battery cell assembly and the adapter assembly are located in the first chamber, and the second channel is separated from the first chamber.

[0015] The second channel described above can exchange heat with the first chamber and the second chamber and carry away part of the heat through the cooling medium, which is conducive to improving the heat dissipation efficiency in the first shell and the second shell.

[0016] In some embodiments of the application, the electrochemical device further includes a second shell and a second circuit board. The second shell is connected to the first shell, and the second shell has a second chamber. The second circuit board is arranged in the second chamber and connected to the battery cell assembly. Along the second direction, the second channel is located between the second circuit board and the adapter assembly.

[0017] In some embodiments of the application, the adapter assembly further includes a first output terminal arranged on the adapter plate, a portion of the first output terminal is located in the second chamber and connected to the second circuit board, and the first output terminal is separated from the second channel.

[0018] Embodiments of the application also provide a power utilization device including the electrochemical device described in any of the preceding embodiments.

[0019] The above electric device has the electrochemical device with good heat dissipation efficiency, and the influence of the electrochemical device on the electric device due to temperature rise can be reduced.

[0020] The embodiment of the present application further provides a manufacturing method of the electrochemical device, comprising the following steps: providing an electric core assembly, the electric core assembly comprising a plurality of single electric cores, the plurality of single electric cores being arranged in a stack along a first direction, each single electric core comprising an electric core shell and an electrode terminal, and the electrode terminal being connected to the electric core shell; providing an adapter assembly, the adapter assembly comprising an adapter plate and a first structural member, the first structural member comprising an insulating material, the first structural member being formed by pouring the insulating material into a side of the adapter plate and then solidifying, and the first structural member being provided with a first channel; assembling the adapter assembly and the electric core assembly, the first structural member connecting at least part of the adapter plate and the electrode terminal; and providing a first shell, and assembling the adapter assembly and the electric core assembly into the first shell.

[0021] In some embodiments of the present application, the first structural member is formed by injection molding the insulating material into the side of the adapter plate and then solidifying. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a first view of the electrochemical device in an embodiment of the present application.

[0023] Figure 2 is a second view of the electrochemical device in an embodiment of the present application.

[0024] Figure 3 is a third view of the electrochemical device in an embodiment of the present application.

[0025] Figure 4 is an exploded view of the electrochemical device in an embodiment of the present application.

[0026] Figure 5 is a structural schematic diagram of a single electric core before packaging in an embodiment of the present application.

[0027] Figure 6 is a structural schematic diagram of a single electric core in an embodiment of the present application.

[0028] Figure 7 is an exploded view of a partial structure of the electrochemical device in an embodiment of the present application.

[0029] Figure 8 is a schematic diagram of a partial structure of the electrochemical device in an embodiment of the present application.

[0030] Figure 9 is a structural schematic diagram of the first structural member and the conductive member in an exploded state in an embodiment of the present application.

[0031] Figure 10is a structural diagram of the connection between the first circuit board and the conductive member in one embodiment of the present application.

[0032] Figure 11 is a first view of the heat dissipation member in one embodiment of the present application.

[0033] Figure 12 is a second view of the heat dissipation member in one embodiment of the present application.

[0034] Figure 13 is Figure 11 is a XII-XII cross-sectional view of the heat dissipation member shown in FIG. 8.

[0035] Figure 14 is a cross-sectional view of the first structural member in one embodiment of the present application.

[0036] Figure 15 is a cross-sectional view of the electrochemical device in one embodiment of the present application.

[0037] Figure 16 is Figure 15 is an enlarged view of the XV portion in the cross-sectional view shown in FIG. 10.

[0038] Figure 17 is a schematic view of the inverted portion of the structure of the electrochemical device in one embodiment of the present application.

[0039] Figure 18 is Figure 1 is an XVIII-XVIII cross-sectional view of the electrochemical device shown in FIG. 11.

[0040] Figure 19 is an exploded view of the two battery cell assemblies, the first structural member, the second structural member, and the air supply device in one embodiment of the present application.

[0041] Figure 20 is a cross-sectional view of the second structural member in one embodiment of the present application.

[0042] Figure 21 is an exploded view of the first structural member, the second structural member, and the air supply device in one embodiment of the present application.

[0043] Figure 22 is a structural diagram of the connection between the two battery cell assemblies through the second structural member in one embodiment of the present application.

[0044] Figure 23 is Figure 22 is an exploded view of the structure shown in FIG. 14.

[0045] Figure 24 is a structural diagram of the use device in one embodiment of the present application.

[0046] Figure 25is a flow chart of steps of a method of manufacturing an electrochemical device in one embodiment of the present application.

[0047] Explanation of main element symbols

[0048] Electrochemical device 100

[0049] First housing 10

[0050] First wall 11

[0051] First through-hole 111

[0052] Second wall 12

[0053] Second through-hole 121

[0054] Third wall 13

[0055] Sixth through-hole 131

[0056] Seventh through-hole 132

[0057] Ninth through-hole 133

[0058] Fourth wall 14

[0059] Fourth through-hole 141

[0060] Eighth through-hole 142

[0061] Tenth through-hole 143

[0062] Heat dissipation member 15

[0063] Fifth through-hole 151

[0064] First hole 1521

[0065] Second hole 1522

[0066] Third hole 1523

[0067] First side wall 1531

[0068] Second side wall 1532

[0069] Third side wall 1533

[0070] Fourth side wall 1534

[0071] First bottom wall 1541

[0072] Second bottom wall 1542

[0073] First region 15421

[0074] Second region 15422

[0075] Connector 1543

[0076] Bottom wall 16

[0077] First chamber 17

[0078] Second Channel 18

[0079] Glue Dispensing Channel 112

[0080] Second shell 40

[0081] Second chamber 41

[0082] Battery cell assembly 20

[0083] 21 single cell

[0084] Cell casing 211

[0085] Part 1 2111

[0086] Part Two 2112

[0087] Main body 2113

[0088] Sealing part 2114

[0089] First sealing part 21141

[0090] Second sealing part 21142

[0091] Electrode assembly 212

[0092] Electrode terminal 213

[0093] Positive electrode terminal 2131

[0094] Negative electrode terminal 2132

[0095] Third structural component 22

[0096] Third bottom wall 221

[0097] Fifth side wall 222

[0098] Sixth side wall 223

[0099] Adapter Component 30

[0100] Adapter board 31

[0101] First circuit board 311

[0102] First structural component 32

[0103] First Channel 321

[0104] First protrusion 322

[0105] First side 331

[0106] Second side 332

[0107] Third through-hole 34

[0108] Conductive member 35

[0109] Connecting member 36

[0110] First output terminal 37

[0111] Second output terminal 38

[0112] Groove 39

[0113] Second circuit board 50

[0114] Thermally conductive member 60

[0115] Wire harness 70

[0116] Second structural member 80

[0117] Third passage 81

[0118] Fourth passage 82

[0119] Air supply device 90

[0120] Electric device 200

[0121] First direction X

[0122] Second direction Y

[0123] Third direction Z

[0124] The following detailed description will further describe the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0125] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0126] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be an element disposed in the middle. When an element is considered to be "disposed on" another element, it can be directly disposed on the other element or there can be an element disposed in the middle. The orientation terms "upper", "lower", "bottom" are only used to assist in describing the positional relationship of different elements, and are not intended to limit the present application.

[0127] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application.

[0128] An embodiment of the present application provides an electrochemical device, comprising a first shell, an electric core assembly and a switching assembly, the electric core assembly and the switching assembly are arranged in the first shell. The electric core assembly comprises a plurality of single electric cores, the plurality of single electric cores are arranged in a stack along a first direction, each single electric core comprises an electric core shell and an electrode terminal, the electrode terminal is connected to the electric core shell. The switching assembly comprises a switching plate and a first structural member, the first structural member comprises an insulating material, the first structural member covers at least part of a surface of the switching plate, the first structural member is provided with a first channel, and the first structural member connects the switching plate and at least part of the electrode terminal.

[0129] In the electrochemical device described above, by arranging the first structural member provided with the first channel on at least part of the surface of the switching plate and connecting the switching plate and the electrode terminal, the heat dissipation efficiency of the first structural member can be improved, the heat exchange efficiency between the electrode terminal and the first structural member can be improved, and then the heat dissipation rate of the single electric core can be improved, the heat dissipation rate of the electric core assembly and the electrochemical device can be improved, and the influence of temperature rise on the charge and discharge performance of the electrochemical device can be reduced.

[0130] The embodiments of the present application will be further described below with reference to the accompanying drawings.

[0131] Embodiment one:

[0132] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 , an embodiment of the present application provides an electrochemical device 100, comprising a first shell 10, an electric core assembly 20, a switching assembly 30 and a second shell 40, the electric core assembly 20 and the switching assembly 30 are arranged in the first shell 10, and the second shell 40 is connected to the first shell 10. The electric core assembly 20 comprises a plurality of single electric cores 21, the plurality of single electric cores 21 are arranged in a stack, each single electric core 21 comprises an electric core shell 211 and an electrode terminal 213, and the electrode terminal 213 is connected to the electric core shell 211. The switching assembly 30 comprises a switching plate 31 and a first structural member 32, the first structural member 32 is provided with a first channel 321, and the electrode terminal 213 is connected to the switching plate 31.

[0133] In the above-mentioned electrochemical device 100, by arranging the first structural member 32 provided with the first channel 321 on at least part of the surface of the adapter plate 31 and connecting the adapter plate 31 and the electrode terminal 213, the heat dissipation efficiency of the first structural member 32 can be improved, the heat exchange efficiency between the electrode terminal 213 and the first structural member 32 can be improved, and then the heat dissipation rate of the single battery cell 21 can be improved, the heat dissipation rate of the battery cell assembly 20 and the electrochemical device 100 can be improved, and the influence of temperature rise on the charge and discharge performance of the electrochemical device 100 can be reduced.

[0134] In an embodiment, the first structural member 32 is made of an insulating material with good thermal conductivity, which is conducive to heat conduction and improves the heat dissipation rate of the battery cell assembly 20. In an embodiment, the material of the first structural member 32 is a mixture formed by filling a thermal conductive filler in a high polymer matrix material. Optionally, the high polymer matrix material includes but is not limited to any one of polyphenylene sulfide (PPS), nylon, synthetic rubber (TPE), polycarbonate (PC), polypropylene (PP), polyphthalamide (PPA), and polyether ether ketone (PEEK), and the thermal conductive filler includes but is not limited to any one of silicon carbide, aluminum oxide, graphite, fibrous high-thermal-conductivity carbon powder, and flaky high-thermal-conductivity carbon powder.

[0135] In an embodiment, the first structural member 32 is coated on part of the surface of the adapter plate 31. In an embodiment, the first structural member 32 is formed by injection molding of an insulating material on part of the surface of the adapter plate 31. In an embodiment, the first structural member 32 is formed by pouring an insulating material on part of the surface of the adapter plate 31.

[0136] In an embodiment, the adapter plate 31 includes a first circuit board 311. Optionally, the first circuit board 311 includes a printed circuit board (PCB), and a plurality of wires (not shown) are arranged on the first circuit board 311. Optionally, the first circuit board 311 includes a flexible circuit board (FPC).

[0137] In an embodiment, the first channel 321 can pass cooling materials. The first channel 321 not only increases the surface area of the first structural member 32 and improves the heat dissipation rate of the first structural member 32, but also passes cooling materials, so that the cooling materials carry away part of the heat on the first structural member 32, further improving the heat dissipation rate of the first structural member 32.

[0138] In an embodiment, the cooling materials include at least one of air, coolant, and cooling liquid.

[0139] In an embodiment, the first shell 10 comprises a first wall 11, a second wall 12, a third wall 13, a fourth wall 14, a heat dissipation member 15 and a bottom wall 16, the first wall 11 and the second wall 12 are arranged, the third wall 13 and the fourth wall 14 are arranged, the heat dissipation member 15 and the bottom wall 16 are arranged, the heat dissipation member 15 and the bottom wall 16 are connected to the first wall 11, the second wall 12, the third wall 13 and the fourth wall 14, the first wall 11, the second wall 12, the third wall 13, the fourth wall 14, the heat dissipation member 15 and the bottom wall 16 form a first cavity 17, the cell assembly 20 and the adapter assembly 30 are arranged in the first cavity 17, and the adapter assembly 30 is located between the heat dissipation member 15 and the cell shell 211. The second shell 40 is connected to the first shell 10 to enclose the first cavity 17.

[0140] In order to better illustrate the structure of the electrochemical device 100, the structure of the electrochemical device 100 will be described in combination with X, Y and Z coordinate axes, which are perpendicular to each other, and the X direction is defined as the first direction, the Y direction is defined as the second direction, and the Z direction is defined as the third direction. The first direction X is the direction in which the third wall 13 and the fourth wall 14 are arranged, the second direction Y is the direction in which the second shell 40 and the bottom wall 16 are arranged, and the third direction Z is the direction in which the first wall 11 and the second wall 12 are arranged.

[0141] In an embodiment, the first wall 11 is provided with a first through hole 111, the second wall 12 is provided with a second through hole 121, and the first channel 321 communicates the first through hole 111 and the second through hole 121. The first channel 321 communicates the space outside the first shell 10, and the cooling medium outside the first shell 10 can flow in the first channel 321, thereby improving the heat dissipation rate of the electrochemical device 100. Optionally, when the cooling medium is air, the air outside the first shell 10 can pass through the first channel 321 under the action of air flow, which not only improves the heat dissipation rate of the electrochemical device 100, but also saves costs.

[0142] In an embodiment, the first channel 321 is arranged along the third direction Z, which can reduce the resistance of the inner wall of the first channel 321 to the cooling medium, reduce the influence of the inner wall of the first channel 321 on the flow of the cooling medium, and shorten the time of the cooling medium passing through the first channel 321, thereby improving the heat dissipation rate of the first structural member 32.

[0143] In an embodiment, the number of first channels 321 is multiple, and the multiple first channels 321 are arranged at intervals along the first direction X. The multiple first channels 321 communicate the first through hole 111 and the second through hole 121, which can further improve the heat dissipation efficiency of the first structural member 32.

[0144] In an embodiment, the first through hole 111 is one, and the first through hole 111 is connected to the plurality of first channels 321. In other embodiments, the first through hole 111 is a plurality (not shown in the figure), and each of the plurality of first through holes 111 is connected to a first channel 321.

[0145] In an embodiment, the first through hole 111 is a plurality (not shown in the figure), and each of the plurality of first through holes 111 is connected to a first channel 321.

[0146] In an embodiment, the second through hole 121 is one, and the second through hole 121 is connected to the plurality of first channels 321. In other embodiments, the second through hole 121 is a plurality (not shown in the figure), and each of the plurality of second through holes 121 is connected to a first channel 321.

[0147] In an embodiment, the second through hole 121 is a plurality (not shown in the figure), and each of the plurality of second through holes 121 is connected to a first channel 321.

[0148] In an embodiment, the plurality of single battery cells 21 are stacked along the first direction X. In the second direction Y, the projection of the plurality of single battery cells 21 overlaps with the projection of the first structure 32, and the plurality of single battery cells 21 are directly or indirectly connected to the first structure 32. Through the first structure 32 connecting the electrode terminals 213 of the plurality of single battery cells 21, part of the heat on the plurality of single battery cells 21 can be transferred to the first structure 32, thereby improving the problem of uneven heat dissipation of the plurality of stacked single battery cells 21, reducing the temperature difference of the plurality of single battery cells 21, and reducing the influence of temperature rise on the charge and discharge performance of the battery cell assembly 20.

[0149] In an embodiment, the first shell 10 is provided with a second channel 18 that can pass through, and the second channel 18 can pass through the cooling material to take away part of the heat in the first chamber 17, thereby improving the heat dissipation rate of the electrochemical device 100. In the second direction Y, the adapter assembly 30 is located between the second channel 18 and the battery cell shell 211, and the adapter assembly 30 can simultaneously transfer heat with the battery cell assembly 20 and the cooling material in the second channel 18, which is conducive to improving the heat dissipation rate of the battery cell assembly 20.

[0150] In an embodiment, the second channel 18 is separated from the first chamber 17, and the second channel 18 not only can take away part of the heat in the first chamber 17 through the cooling material, but also can reduce the risk of foreign matter entering the first chamber 17 through the second channel 18.

[0151] In an embodiment, the third wall 13 is provided with a sixth through hole 131, the fourth wall 14 is provided with a fourth through hole 141, the heat dissipation member 15 is provided with a fifth through hole 151, the fifth through hole 151 is communicated with the sixth through hole 131 and the fourth through hole 141, and the second channel 18 comprises the sixth through hole 131 and the fourth through hole 141. The second channel 18 penetrates the third wall 13, the fourth wall 14 and the heat dissipation member 15 along the first direction X, which can reduce the resistance of the inner wall of the second channel 18 to the cooling medium, reduce the influence of the inner wall of the second channel 18 on the flow of the cooling medium, shorten the time of the cooling medium passing through the second channel 18, and thus improve the heat dissipation rate of the electrochemical device 100.

[0152] In an embodiment, along the second direction Y, the projection of the plurality of single battery cells 21 overlaps with the projection of the second channel 18, and the adapter assembly 30 is directly or indirectly connected to the heat dissipation member 15. Part of the heat on the adapter assembly 30 can be transferred to the heat dissipation member 15 and taken away by the cooling medium in the second channel 18, which can improve the heat dissipation rate of the adapter assembly 30 and the heat dissipation rate of the battery cell assembly 20, and reduce the influence of temperature rise on the charge-discharge performance of the battery cell assembly 20. Optionally, the adapter assembly 30 and the heat dissipation member 15 are connected by a heat-conducting adhesive, such as heat-conducting glue.

[0153] In an embodiment, the number of the second channels 18 is multiple, and the multiple second channels 18 are arranged at intervals along the second direction Y, which can further improve the heat dissipation efficiency of the first structural member 32. Optionally, the number of the second channels 18 is two.

[0154] In an embodiment, the number of the sixth through holes 131 on the third wall 13 is multiple, and the multiple sixth through holes 131 are arranged at intervals along the third direction Z. Optionally, the number of the sixth through holes 131 is two. In other embodiments, the number of the sixth through holes 131 on the third wall 13 is one (not shown in the figure).

[0155] In an embodiment, the number of the fourth through holes 141 on the fourth wall 14 is multiple, and the multiple fourth through holes 141 are arranged at intervals along the third direction Z. Optionally, the number of the fourth through holes 141 is two. In other embodiments, the number of the fourth through holes 141 on the fourth wall 14 is one (not shown in the figure).

[0156] In an embodiment, the number of the fifth through holes 151 on the heat dissipation member 15 is multiple, and the multiple fifth through holes 151 are arranged at intervals along the third direction Z. Optionally, the number of the fifth through holes 151 is two, and each fifth through hole 151 is communicated with one sixth through hole 131 and one fourth through hole 141. In other embodiments, the number of the fifth through holes 151 on the heat dissipation member 15 is one (not shown in the figure).

[0157] In one embodiment, the heat sink 15 is made of an insulating material with good thermal conductivity, which is beneficial for heat conduction and improves the heat dissipation rate of the electrochemical device 100. In one embodiment, the heat sink 15 is made of a mixture formed by filling a polymer matrix material with thermally conductive filler. Optionally, the polymer matrix material includes, but is not limited to, any one of polyphenylene sulfide (PPS), nylon, synthetic rubber (TPE), polycarbonate (PC), polypropylene (PP), polyphthalamide (PPA), and polyether ether ketone (PEEK). The thermally conductive filler includes, but is not limited to, any one of silicon carbide, alumina, graphite, fibrous high thermal conductivity carbon powder, and flake high thermal conductivity carbon powder.

[0158] In one embodiment, the heat sink 15 comprises a metallic material, such as aluminum.

[0159] In one embodiment, the heat sink 15 is made of a metallic material, such as aluminum.

[0160] In one embodiment, the heat sink 15 includes a metal material and an insulating layer, the insulating layer being disposed on the surface of the metal material to increase the insulation performance of the heat sink 15.

[0161] In one embodiment, the electrochemical device 100 further includes a second circuit board 50. The second housing 40 has a second chamber 41, and the second circuit board 50 is disposed within the second chamber 41 and connected to the battery cell assembly 20. Along the second direction Y, a second channel 18 is located between the second circuit board 50 and the adapter assembly 30. The cooling material in the second channel 18 can also remove some of the heat from the second chamber 41, reducing the impact of the temperature rise in the second chamber 41 on the second circuit board 50.

[0162] In one embodiment, the second circuit board 50 includes a BMS (Battery Management System) component, which includes multiple electronic components capable of performing functions such as data acquisition, control, protection, communication, power calculation, signal transmission, and power transmission for the individual battery cell 21.

[0163] In one embodiment, the second housing 40 is connected to the heat sink 15, which encloses the second chamber 41. In another embodiment, the second housing 40 is connected to the first wall 11, the second wall 12, the third wall 13, and the fourth wall 14.

[0164] like Figure 5 and Figure 6 As shown, in one embodiment, the single cell 21 further includes an electrode assembly 212, which is disposed inside the cell housing 211. A portion of the electrode terminal 213 is located inside the cell housing 211 and connected to the electrode assembly 212, while a portion of the electrode terminal 213 extends out of the cell housing 211.

[0165] In one embodiment, the electrode assembly 212 includes a positive electrode, a negative electrode, and a separator (not shown). The separator is disposed between the positive electrode and the negative electrode. The positive electrode, the separator, and the negative electrode are wound or stacked to form the electrode assembly 212.

[0166] In one embodiment, the cell housing 211 includes a first portion 2111 and a second portion 2112 that are connected to each other. When the first portion 2111 and the second portion 2112 are connected, they form an internal space for accommodating the electrode assembly 212. In another embodiment, the cell housing 211 includes a first portion 2111 and a second portion 2112 (not shown) that are separated from each other. When the first portion 2111 and the second portion 2112 are connected, they form an internal space for accommodating the electrode assembly 212.

[0167] In one embodiment, the cell housing 211 includes a main body portion 2113 and a sealing portion 2114 connected to each other. The sealing portion 2114 extends from the main body portion 2113, and the electrode assembly 212 is housed within the main body portion 2113. The electrode terminal 213 extends out of the cell housing 211 from the sealing portion 2114. In another embodiment, the sealing portion 2114 includes a first sealing portion 21141 and a second sealing portion 21142 connected to each other. The first sealing portion 21141 is located at the end of the main body portion 2113 along a second direction Y, and the second sealing portion 21142 is located at the end of the main body portion 2113 along a third direction Z. The electrode terminal 213 extends out of the cell housing 211 from the first sealing portion 21141. In one embodiment, there are two second sealing portions 21142, which are located at opposite ends of the main body 2113 along the third direction Z. A first sealing portion 21141 is located between the two second sealing portions 21142 and connects the two second sealing portions 21142.

[0168] Electrode terminals 213 include a positive electrode terminal 2131 and a negative electrode terminal 2132. The positive electrode terminal 2131 is connected to the positive electrode plate, and the negative electrode terminal 2132 is connected to the negative electrode plate. In one embodiment, the positive electrode terminal 2131 and the negative electrode terminal 2132 are located on the same side of the cell housing 211. In another embodiment, the positive electrode terminal 2131 and the negative electrode terminal 2132 are located at opposite ends of the cell housing 211 (not shown). As an example, the following description further illustrates the case where the positive electrode terminal 2131 and the negative electrode terminal 2132 are located on the same side of the cell housing 211.

[0169] like Figure 7 and Figure 8 As shown, in one embodiment, along the second direction Y, the adapter 30 has a first side 331 and a second side 332 that are opposite to each other, the heat sink 15 is located on the second side 332 of the adapter 30, and the cell housing 211 is located on the first side 331 of the adapter 30.

[0170] In an embodiment, the adapter assembly 30 is provided with a third through hole 34, the third through hole 34 is in communication with the first side 331 and the second side 332, and the third through hole 34 is capable of allowing the electrode terminal 213 to pass through. The electrode terminal 213 is inserted into the third through hole 34 from the first side 331 and partially extends out of the second side 332. The electrode terminal 213 extending out of the second side 332 is connected to the adapter assembly 30, which can improve the stability of the connection between the electrode terminal 213 and the adapter assembly 30, reduce the influence of shaking on the connection between the electrode terminal 213 and the adapter assembly 30, and improve the contact area between the electrode terminal 213 and the adapter assembly 30, thereby improving the heat exchange efficiency between the electrode terminal 213 and the adapter assembly 30.

[0171] In an embodiment, the third through hole 34 is in a plurality, and the positions of the plurality of third through holes 34 correspond to the positions of the plurality of electrode terminals 213, so that the plurality of electrode terminals 213 can extend out of the second side 332 through the third through hole 34. In an embodiment, the plurality of third through holes 34 are arranged in sequence along the first direction X.

[0172] In an embodiment, along the second direction Y, the projection of the first channel 321 is located between the projections of two adjacent third through holes 34. Alternatively, along the second direction Y, the projection of one first channel 321 is located between the projections of two adjacent third through holes 34, which is conducive to improving heat dissipation. When the plurality of electrode terminals 213 pass through the plurality of third through holes 34, there is a first channel 321 between two adjacent electrode terminals 213. The cooling medium in the first channel 321 can simultaneously take away part of the heat on the two electrode terminals 213, which is conducive to improving the temperature difference between the plurality of stacked single battery cells 21 and improving the heat dissipation rate of the battery cell assembly 20.

[0173] In an embodiment, the electrochemical device 100 further comprises a heat-conducting member 60, which is in contact with the first structural member 32 and the electrode terminal 213. The heat-conducting member 60 can transfer part of the heat on the electrode terminal 213 to the first structural member 32, improve the heat exchange efficiency between the electrode terminal 213 and the first structural member 32, and improve the heat dissipation rate of the battery cell assembly 20.

[0174] In an embodiment, the heat-conducting member 60 is located on the first side 331. In an embodiment, the heat-conducting member 60 is located on the second side 332. In an embodiment, the heat-conducting member 60 fills the gap between the electrode terminal 213 and the inner wall of the third through hole 34. In an embodiment, part of the heat-conducting member 60 is located on the first side 331, and part of the heat-conducting member 60 fills the third through hole 34. In an embodiment, part of the heat-conducting member 60 is located on the first side 331, part of the heat-conducting member 60 fills the gap between the electrode terminal 213 and the inner wall of the third through hole 34, and part of the heat-conducting member 60 is located on the second side 332, which is conducive to heat dissipation and further improves the structural stability of the electrochemical device 100.

[0175] Please refer to Figure 7 , Figure 8 , Figure 9 and Figure 10 In an embodiment, the adapter assembly 30 further comprises a conductive member 35, a portion of the conductive member 35 is exposed to the first structural member 32, and the portion of the conductive member 35 exposed to the first structural member 32 is used to contact and connect the electrode terminal 213. Optionally, the portion of the conductive member 35 exposed to the first structural member 32 is located on the second side 332, and the electrode terminal 213 is connected to the conductive member 35 after being extended out of the second side 332 by the third through hole 34. Optionally, the conductive member 35 is welded to the adapter plate 31, such as laser welding or ultrasonic welding.

[0176] In an embodiment, the number of conductive members 35 is multiple, and the multiple conductive members 35 are arranged at intervals. In the first direction X, the multiple conductive members 35 are arranged at intervals, and each conductive member 35 is arranged between two adjacent third through holes 34. In an embodiment, the electrode terminal 213 is bent towards the adjacent conductive member 35 after being extended out of the second side 332 by the third through hole 34 and connected to the conductive member 35. In an embodiment, the two electrode terminals 213 on the adjacent two single battery cells 21 are connected to the same conductive member 35 after being extended out of the second side 332 by the adjacent two third through holes 34 and bent towards each other, and the two electrode terminals 213 are electrically connected to realize electrical connection between the adjacent two single battery cells 21. In an embodiment, the two electrode terminals 213 are connected to the conductive member 35 in a stacked manner. Optionally, the two electrode terminals 213 are connected to the conductive member 35 in a stacked manner and then fixed by welding, which can improve the quality and stability of the electrical connection of the electrode terminal 213 and reduce the risk of poor contact of the electrode terminal 213 due to shaking, such as laser welding or ultrasonic welding.

[0177] In an embodiment, a portion of the conductive member 35 is embedded in the adapter plate 31. In an embodiment, a portion of the conductive member 35 is embedded in the first structural member 32, and the conductive member 35 is embedded in the first structural member 32 by an injection molding process, which can improve the assembly efficiency and quality.

[0178] In an embodiment, the conductive member 35 is made of a metal material with good electrical conductivity, such as copper.

[0179] Please refer to Figure 4 and Figure 7 In an embodiment, the conductive member 35 can be multiple, and the adapter assembly 30 further comprises a connecting member 36 arranged on the second side 332 of the adapter assembly 30 and electrically connected to the multiple conductive members 35.

[0180] In an embodiment, the connector 36 is partially embedded in the adapter plate 31 and electrically connected to the plurality of conductive members 35 by wiring within the adapter plate 31. In an embodiment, the connector 36 is connected to the adapter plate 31 by soldering. In an embodiment, the connector 36 is partially embedded in the first structural member 32, and optionally, the connector 36 is partially embedded in the first structural member 32 by an injection molding process, which can improve assembly efficiency and quality.

[0181] In an embodiment, the electrochemical device 100 further comprises a harness 70, which is plugged into the connector 36 and electrically connected to the plurality of single cells 21 through the connector 36 and the conductive members 35. The harness 70 is partially inserted into the second chamber 41 and connected to the second circuit board 50. The harness 70 can be used to collect electrical signal information such as voltage, current, and temperature of the single cells 21, and the second circuit board 50 can obtain the electrical signal information of the single cells 21 through the harness 70. In an embodiment, the harness 70 is plug-ably plugged into the connector 36, which is conducive to assembly. In an embodiment, the connector 36 comprises a connector.

[0182] In an embodiment, the adapter assembly 30 further comprises a first output terminal 37 and a second output terminal 38, the first output terminal 37 is disposed on the second side 332 of the adapter assembly 30 and electrically connected to the conductive members 35, the second output terminal 38 is disposed on the second side 332 of the adapter assembly 30 and electrically connected to the conductive members 35, the first output terminal 37 and the second output terminal 38 are electrically connected to the cell assembly 20 through the conductive members 35. The first output terminal 37 and the second output terminal 38 are partially inserted into the second chamber 41 and electrically connected to the second circuit board 50. The first output terminal 37 and the second channel 18 are isolated from each other, and the second output terminal 38 and the second channel 18 are isolated from each other. Optionally, the second circuit board 50 controls the charging and discharging of the cell assembly 20 through the first output terminal 37 and the second output terminal 38. Optionally, the first output terminal 37 and the second output terminal 38 can be used to transmit power, one of the first output terminal 37 and the second output terminal 38 is a total positive output terminal of the cell assembly 20, and the other is a total negative output terminal of the cell assembly 20.

[0183] In an embodiment, the first output terminal 37 is partially embedded in the adapter plate 31 and electrically connected to the conductive members 35. In an embodiment, the first output terminal 37 is connected to the adapter plate 31 by soldering and electrically connected to the conductive members 35. In an embodiment, the first output terminal 37 is partially embedded in the first structural member 32 and electrically connected to the conductive members 35, and optionally, the first output terminal 37 is partially embedded in the first structural member 32 by an injection molding process, which can improve assembly efficiency and quality.

[0184] In an embodiment, the second output terminal 38 is partially embedded in the adapter plate 31 and electrically connected to the conductive member 35. In an embodiment, the second output terminal 38 is welded to the adapter plate 31 and electrically connected to the conductive member 35. In an embodiment, the second output terminal 38 is partially embedded in the first structural member 32 and electrically connected to the conductive member 35. Optionally, the second output terminal 38 is partially embedded in the first structural member 32 by an injection molding process, which can improve the assembly efficiency and quality.

[0185] Optionally, the first output terminal 37 and the second output terminal 38 are respectively located at two ends of the adapter assembly 30 along the third direction Z.

[0186] Please refer to Figure 4 、 Figure 11 、 Figure 12 and Figure 13 In an embodiment, the heat dissipation member 15 is further provided with a first hole 1521 penetrating through the heat dissipation member 15 along the second direction Y and connecting the first chamber 17 and the second chamber 41. Part of the wire harness 70 passes through the first hole 1521, so that the wire harness 70 can be partially accommodated in the first chamber 17 and partially accommodated in the second chamber 41. The first hole 1521 for the wire harness 70 to pass through can limit the displacement of the wire harness 70 and reduce the influence of shaking on the wire harness 70.

[0187] In an embodiment, along the third direction Z, the first hole 1521 is located between the two second channels 18, and the first hole 1521 is away from the second channels 18, which is conducive to reducing the risk of foreign matter entering the first hole 1521 through the second channels 18.

[0188] In an embodiment, the heat dissipation member 15 is further provided with a second hole 1522 penetrating through the heat dissipation member 15 along the second direction Y, and the second hole 1522 connects the first chamber 17 and the second chamber 41. Part of the first output terminal 37 passes through the second hole 1522, and the first output terminal 37 can be partially accommodated in the first chamber 17 and partially accommodated in the second chamber 41. The second hole 1522 for the first output terminal 37 to pass through can limit the displacement of the first output terminal 37, reduce the influence of shaking on the first output terminal 37, and also play an insulation protection role to reduce the risk of short circuit caused by electrical connection between the first output terminal 37 and other elements.

[0189] In an embodiment, the heat dissipation member 15 is further provided with a third hole 1523 penetrating the heat dissipation member 15 along the second direction Y, the third hole 1523 being in communication with the first chamber 17 and the second chamber 41. A part of the second output terminal 38 passes through the third hole 1523, and the second output terminal 38 can be partially accommodated in the first chamber 17 and partially accommodated in the second chamber 41. The third hole 1523 is for the second output terminal 38 to pass through, which can limit the displacement of the second output terminal 38, reduce the influence of shaking on the second output terminal 38, and also play an insulating protection role, reducing the risk of short circuit caused by the electrical connection between the second output terminal 38 and other elements.

[0190] In an embodiment, along the third direction Z, the second hole 1522 and the third hole 1523 are respectively located at two ends of the heat dissipation member 15 and outside the two second channels 18, which is beneficial to reduce the risk of short circuit caused by the electrical connection between the first output terminal 37 and the second output terminal 38.

[0191] In an embodiment, the heat dissipation member 15 further includes a first side wall 1531, a second side wall 1532, a third side wall 1533, a fourth side wall 1534, a first bottom wall 1541, a second bottom wall 1542, and a connecting portion 1543. The first side wall 1531 and the second side wall 1532 are arranged opposite to each other along the first direction X, the third side wall 1533 and the fourth side wall 1534 are arranged opposite to each other along the second direction Y, and the first bottom wall 1541 and the second bottom wall 1542 are arranged opposite to each other along the third direction Z. The first bottom wall 1541 connects the first side wall 1531, the second side wall 1532, the third side wall 1533, and the fourth side wall 1534. The second bottom wall 1542 includes a first area 15421 and a second area 15422. The first area 15421 connects the first side wall 1531, the second side wall 1532, and the third side wall 1533, and is connected to the first bottom wall 1541 through the connecting portion 1543. The first area 15421, the first side wall 1531, the second side wall 1532, the third side wall 1533, the connecting portion 1543, and part of the first bottom wall 1541 form a part of a second channel 18. The second area 15422 connects the first side wall 1531, the second side wall 1532, and the fourth side wall 1534, and is connected to the first bottom wall 1541 through the connecting portion 1543. The second area 15422, the first side wall 1531, the second side wall 1532, the fourth side wall 1534, the connecting portion 1543, and part of the first bottom wall 1541 form a part of another second channel 18.

[0192] The second channel 18 penetrates the first side wall 1531 and the second side wall 1532, the two second channels 18 are located between the third side wall 1533 and the fourth side wall 1534 along the third direction Z, and the two second channels 18 are located between the first bottom wall 1541 and the second bottom wall 1542 along the second direction Y. The first hole 1521, the second hole 1522 and the third hole 1523 all penetrate the first bottom wall 1541 and the second bottom wall 1542.

[0193] As shown in Figure 14 , Figure 15 and Figure 16 , the first structure 32 includes a plurality of first protrusions 322, and the plurality of first protrusions 322 are arranged on the first side 331 of the adapter assembly 30. Each first protrusion 322 extends along the third direction Z, and the plurality of first protrusions 322 are arranged in a spaced manner along the first direction X, and the third through hole 34 is arranged between two adjacent first protrusions 322. The first sealing portion 21141 is partially located between the two adjacent first protrusions 322, which is conducive to the heat on the electrode terminal 213 being transferred to the first structure 32 through the first protrusion 322, and improves the heat exchange efficiency between the electrode terminal 213 and the first structure 32. The first protrusion 322 can also increase the surface area of the first structure 32, improve the efficiency of the first structure 32 in absorbing and dissipating heat, and is conducive to improving the heat dissipation rate of the battery assembly 20.

[0194] In an embodiment, part of the heat-conducting member 60 is located between the electrode terminal 213 and the adjacent first protrusion 322 and connects the electrode terminal 213 and the adjacent first protrusion 322, which can improve the heat exchange efficiency between the electrode terminal 213 and the first structure 32.

[0195] In an embodiment, along the first direction X, part of the first sealing portion 21141 is located between the two adjacent first protrusions 322, and part of the heat-conducting member 60 connects the first sealing portion 21141 and the first protrusion 322 adjacent thereto. Part of the heat on the first sealing portion 21141 can be transferred to the first structure 32 through the heat-conducting member 60, which is conducive to improving the heat dissipation rate of the single battery cell 21.

[0196] In an embodiment, the cross-sectional area of the first protrusion 322 gradually decreases in a direction opposite to the second direction Y. When the electrode terminal 213 is inserted into the third through hole 34 by the first side 331, the first protrusion 322 can play a guiding role to guide the electrode terminal 213 to accurately insert into the third through hole 34, thereby improving the assembly efficiency. In an embodiment, along the third direction Z, the first channel 321 penetrates through the first protrusion 322, which not only can further increase the heat dissipation area of the first structural member 32 and improve the heat dissipation capacity of the first structural member 32, but also can shorten the heat conduction path between the heat conduction member 60 and the cooling material in the first channel 321, thereby improving the heat exchange efficiency between the heat conduction member 60 and the first structural member 32.

[0197] In an embodiment, the heat conduction member 60 is formed by filling and curing the heat conduction glue between the first structural member 32 and the first electrode terminal 213. In an embodiment, the heat conduction glue includes, but is not limited to, any one of ultrahigh-temperature heat conduction glue, pouring glue, silicone heat conduction glue, epoxy AB glue, polyurethane glue, polyurethane heat conduction and conductive glue, and heat conduction silicone grease.

[0198] Please refer to Figure 12 , Figure 13 , Figure 14 and Figure 16 In an embodiment, along the second direction Y, the first side wall 1531, the second side wall 1532, the third side wall 1533, and the fourth side wall 1534 extend beyond the first bottom wall 1541 toward the battery cell assembly 20. The adapter assembly 30 is provided with a groove 39, the groove 39 is located on the second side 332 of the adapter assembly 30, and the opening of the groove 39 faces the first bottom wall 1541. Part of the first side wall 1531, part of the second side wall 1532, part of the third side wall 1533, and part of the fourth side wall 1534 extend into the groove 39 and abut against the groove 39. The heat dissipation member 15 and the adapter assembly 30 are limited to each other along the second direction Y, which can reduce the number of supports and save the cost of the electrochemical device 100.

[0199] Please refer to Figure 17 and Figure 18 In an embodiment, in the case of inverting part of the structure of the electrochemical device 100, the heat conduction glue is poured into the first housing 10, and the heat conduction glue flows to the first structural member 32 and the first electrode terminal 213 under the action of gravity to form the heat conduction member 60 after curing.

[0200] In an embodiment, the cell assembly 20, the adapter assembly 30 and the heat sink 15 are connected, and the harness 70, the first output terminal 37 and the second output terminal 38 pass through the heat sink 15, the first wall 11, the second wall 12, the third wall 13, the fourth wall 14 and the heat sink 15 are connected together and inverted as a whole, wherein after inversion, the heat sink 15 is located at the bottom, the adapter assembly 30 is located between the heat sink 15 and the cell housing 211, the first side 331 is located above the adapter assembly 30, and the second side 332 is located below the adapter assembly 30. The first wall 11, the second wall 12, the third wall 13, the fourth wall 14 and the heat sink 15 surround to form a cavity space with an opening facing upward, and the cell assembly 20 and the adapter assembly 30 are located in the cavity space.

[0201] In an embodiment, the electrochemical device 100 includes two rows of cell assemblies 20, and a glue injection channel 112 is arranged between the two rows of cell assemblies 20, the glue injection channel 112 communicates with the cavity space, and by injecting the heat-conducting glue into the glue injection channel 112, the heat-conducting glue can flow into the cavity space. Optionally, the two rows of cell assemblies 20 are arranged along the third direction Z.

[0202] In an embodiment, the electrochemical device 100 further includes a first sealing member (not shown in the figure), which surrounds the side wall of the first structure 32 and the first wall 11, the second wall 12, the third wall 13, the fourth wall 14 of the first structure in the circumferential direction of the adapter assembly 30. The first sealing member can play a sealing role, reduce the risk of leakage of the heat-conducting glue from the gap between the side wall of the first structure 32 and the first housing 10, and save the cost of the electrochemical device 100.

[0203] In an embodiment, along the second direction Y, the first sealing member is flush with the end of the side wall of the first structure 32. In an embodiment, along the second direction Y, part of the first sealing member protrudes from the side wall of the first structure 32, which can reduce the risk of overflow of the heat-conducting glue from the end of the side wall of the first structure 32, reduce the risk of waste of the heat-conducting glue, and save the cost of the electrochemical device 100.

[0204] In an embodiment, the heat-conducting glue can flow to the second side 332 of the adapter assembly 30 through the third through hole 34, fill the gap between the adapter assembly 30 and the first bottom wall 1541, and form the heat-conducting member 60 after solidification. The heat-conducting member 60 contacts and connects the electrode terminal 213 and the first bottom wall 1541, can transfer part of the heat on the electrode terminal 213 of the second side 332 to the first bottom wall 1541, and take away the heat with the help of the cooling medium in the second channel 18, and can further improve the heat dissipation rate of the single cell 21.

[0205] In an embodiment, the first seal member comprises a foam which contacts the sidewall of the first structural member 32. In an embodiment, the first seal member comprises a glue which is cured to fill the gap between the first structural member 32 and the first housing 10 before the inversion setup, reducing the overflow of the thermal conductive glue from the gap between the first structural member 32 and the first housing 10.

[0206] Please refer to Figure 4 , Figure 13 , Figure 16 and Figure 17 In an embodiment, the electrochemical device 100 further comprises a second seal member (not shown), a third seal member (not shown) and a fourth seal member (not shown). The second seal member fills the gap between the wire harness 70 and the first hole 1521, the third seal member fills the gap between the first output terminal 37 and the second hole 1522, and the fourth seal member fills the gap between the second output terminal 38 and the third hole 1523 before the inversion setup. After the thermal conductive glue enters the gap between the adapter assembly 30 and the first bottom wall 1541 through the third through hole 34, the second seal member, the third seal member and the fourth seal member can play a sealing role, reducing the leakage of the thermal conductive glue from the gap between the wire harness 70 and the first hole 1521, the gap between the first output terminal 37 and the second hole 1522, and the gap between the second output terminal 38 and the third hole 1523, limiting the flow of the thermal conductive glue, reducing the adverse effects on the operation of the battery cell assembly 20, reducing the waste of the thermal conductive glue, and saving costs.

[0207] In an embodiment, the second seal member is formed by filling the gap between the wire harness 70 and the first hole 1521 with structural glue and then curing. In an embodiment, the second seal member can also play a fixing role, fixing the part of the wire harness 70 to the heat dissipation member 15, improving the anti-shock performance of the electrochemical device 100.

[0208] In an embodiment, the third seal member is formed by filling the gap between the first output terminal 37 and the second hole 1522 with structural glue and then curing. In an embodiment, the third seal member can also play a fixing role, fixing the part of the first output terminal 37 to the heat dissipation member 15, improving the anti-shock performance of the electrochemical device 100.

[0209] In an embodiment, the fourth seal member is formed by filling the gap between the second output terminal 38 and the third hole 1523 with structural glue and then curing. In an embodiment, the fourth seal member can also play a fixing role, fixing the part of the second output terminal 38 to the heat dissipation member 15, improving the anti-shock performance of the electrochemical device 100.

[0210] Please refer to Figure 4 , Figure 19 and Figure 20In an embodiment, the number of the battery cell assemblies 20 is multiple, the multiple battery cell assemblies 20 are arranged along the third direction Z, and the multiple battery cell assemblies 20 are connected to the first structural member 32 and electrically connected to the second circuit board 50. In an embodiment, the number of the battery cell assemblies 20 is two. In other embodiments, the number of the battery cell assemblies 20 can also be three, four or more.

[0211] As an example, the number of the battery cell assemblies 20 is two, which is further described below.

[0212] In an embodiment, the electrochemical device 100 further comprises a second structural member 80, which is arranged between the two battery cell assemblies 20 along the third direction Z, and the second structural member 80 connects the two battery cell assemblies 20. When viewed along the third direction Z, the projection of the multiple single battery cells 21 overlaps the projection of the second structural member 80. The second structural member 80 is connected to the multiple single battery cells 21, so that part of the heat on the multiple single battery cells 21 is transferred to the second structural member 80, which is conducive to improving the temperature difference of each single battery cell 21 in the battery cell assembly 20. Optionally, when viewed along the third direction Z, the projection of all the single battery cells 21 overlaps the projection of the second structural member 80, which is conducive to further improving the heat dissipation efficiency of the multiple single battery cells 21 and improving the temperature difference of each single battery cell 21.

[0213] In an embodiment, the second structural member 80 is provided with a third channel 81, and the third channel 81 is capable of passing the cooling medium. The third channel 81 not only increases the heat dissipation area of the second structural member 80, but also enables the cooling medium to take away part of the heat, thereby improving the heat dissipation rate of the second structural member 80 and the heat dissipation rate of the battery cell assembly 20. Optionally, the third channel 81 penetrates the second structural member 80 along the first direction X.

[0214] In an embodiment, the number of the third channels 81 is one. In other embodiments, the number of the third channels 81 can also be two, three, four or more (not shown in the figure).

[0215] In an embodiment, the third wall 13 is provided with a seventh through hole 132, and the fourth wall 14 is provided with an eighth through hole 142. Both the seventh through hole 132 and the eighth through hole 142 are capable of passing the cooling medium. The third channel 81 communicates the seventh through hole 132 and the eighth through hole 142, and the seventh through hole 132, the third channel 81 and the eighth through hole 142 form a heat dissipation channel capable of passing the cooling medium. This enables the cooling medium outside the first shell 10 to pass through the third channel 81 and take away at least part of the heat on the second structural member 80, thereby improving the heat dissipation efficiency of the second structural member 80, the heat dissipation efficiency of the electrochemical device 100, the temperature difference of each single battery cell 21 in the electrochemical device 100, and the influence of temperature rise on the charge and discharge performance of the electrochemical device 100.

[0216] In an embodiment, the heat dissipation channels formed by the seventh through holes 132, the third passages 81 and the eighth through holes 142 are arranged along the first direction X, which can reduce the resistance of the cooling medium flowing therein, increase the speed of the cooling medium passing through, shorten the time of the cooling medium passing through, thereby improving the heat dissipation efficiency of the second structural member 80 and the heat dissipation efficiency of the electrochemical device 100.

[0217] In an embodiment, the two ends of the second structural member 80 along the first direction X respectively contact the third wall 13 and the fourth wall 14, which can reduce the risk of foreign matter outside the first shell 10 entering the first shell 10 through the gap between the second structural member 80 and the third wall 13 or the gap between the second structural member 80 and the fourth wall 14. Alternatively, the two ends of the second structural member 80 along the first direction X are respectively bonded to the third wall 13 and the fourth wall 14 by adhesive. Alternatively, the two ends of the second structural member 80 along the first direction X are respectively fastened to the third wall 13 and the fourth wall 14 by screws.

[0218] In an embodiment, the number of the seventh through holes 132 is equal to the number of the third passages 81 and the positions are corresponding. In an embodiment, the number of the eighth through holes 142 is equal to the number of the third passages 81 and the positions are corresponding.

[0219] In an embodiment, the outer surface of the second structural member 80 comprises a metal material with good heat conduction performance, which is conducive to heat dissipation. In an embodiment, the second structural member 80 is made of a metal material with good heat conduction performance, such as aluminum. In an embodiment, the second structural member 80 is formed by one-time casting.

[0220] In an embodiment, the second structural member 80 is further provided with a fourth passage 82, and the fourth passage 82 communicates with the first passage 321. The fourth passage 82 not only increases the heat dissipation area of the second structural member 80, but also forms a heat dissipation channel with the first passage 321, so that the cooling medium outside the first shell 10 passes through the first passage 321 and the fourth passage 82, and at least part of the heat on the second structural member 80 is taken away, which can further improve the heat dissipation efficiency of the second structural member 80 and the heat dissipation efficiency of the electrochemical device 100, reduce the temperature difference of each single battery cell 21 in the electrochemical device 100, and reduce the influence of temperature rise on the charge and discharge performance of the electrochemical device 100.

[0221] In one embodiment, the fourth channel 82 penetrates the second structural member 80 along the first direction X. The third wall 13 is also provided with a ninth through hole 133, and the fourth wall 14 is also provided with a tenth through hole 143. Both the ninth through hole 133 and the tenth through hole 143 can allow cooling material to pass through. The fourth channel 82 connects the ninth through hole 133 and the tenth through hole 143, so that the ninth through hole 133, the fourth channel 82 and the tenth through hole 143 can form a heat dissipation channel for cooling material to pass through. This allows the cooling material outside the first housing 10 to pass through the third wall 13, the fourth channel 82 and the fourth wall 14, carrying away at least part of the heat on the second structural member 80, thereby improving the heat dissipation efficiency of the second structural member 80 and improving the heat dissipation efficiency of the electrochemical device 100.

[0222] In one embodiment, the number of ninth through holes 133 is equal to the number of fourth channels 82 and their positions correspond. In another embodiment, the number of tenth through holes 143 is equal to the number of fourth channels 82 and their positions correspond.

[0223] like Figure 19 , Figure 20 and Figure 21 As shown, in one embodiment, the electrochemical device 100 further includes a ventilation device 90, which is disposed within the first chamber 17. The ventilation device 90 connects the fourth channel 82 and the first channel 321, and can accelerate the gas flow between the fourth channel 82 and the first channel 321, thereby improving the heat dissipation effect of the first channel 321 and the fourth channel 82. In one embodiment, the ventilation device 90 is disposed between two battery cell assemblies 20, with a portion of the ventilation device 90 connected to the second structural member 80 and a portion of the ventilation device 90 connected to the first structural member 32. Optionally, the ventilation device 90 includes a fan.

[0224] like Figure 22 and Figure 23 As shown, in one embodiment, the battery cell assembly 20 further includes a third structural member 22. The third structural member 22 is connected to the cell housing 211 of the individual battery cell 21 and the second structural member 80. Along the first direction X, the projection of the third structural member 22 overlaps with the projection of the cell housing 211. Along the third direction Z, the projection of the third structural member 22 overlaps with the projection of the second structural member 80. Some of the heat on the individual battery cell 21 can be transferred to the third structural member 22 through the cell housing 211, and some of the heat on the third structural member 22 can be transferred to the second structural member 80. The third structural member 22 helps to improve the heat dissipation efficiency of the individual battery cell 21.

[0225] In one embodiment, there are multiple third structural members 22, each of which is connected to the cell housing 211 and the second structural member 80, which can improve the heat dissipation efficiency of the cell assembly 20.

[0226] In an embodiment, the third structural member 22 comprises a third bottom wall 221, a fifth side wall 222 and a sixth side wall 223, the fifth side wall 222 and the sixth side wall 223 are arranged on the third bottom wall 221 and are located on the same side of the third bottom wall 221 along the first direction X.

[0227] Taking the third structural member 22 and the single battery cell 21 connected with each other as an example, along the first direction X, the projection of the battery cell shell 211 is located within the projection of the third bottom wall 221, along the third direction Z, the projection of the battery cell shell 211 overlaps with the projection of the fifth side wall 222, and along the second direction Y, the projection of the battery cell shell 211 overlaps with the projection of the sixth side wall 223. The third structural member 22 wraps part of the battery cell shell 211, which can improve the heat transfer efficiency between the third structural member 22 and the single battery cell 21.

[0228] In an embodiment, the number of the fifth side wall 222 is two, and the two fifth side walls 222 are respectively located on both sides of the battery cell shell 211 along the third direction Z. In an embodiment, the fifth side wall 222 is opposite to and connected with the second sealing portion 21142 of the battery cell shell 211 along the third direction Z. In an embodiment, the sixth side wall 223 is opposite to and connected with the bottom of the battery cell shell 211 along the second direction Y, wherein the bottom of the battery cell shell 211 and the first sealing portion 21141 are respectively located on opposite ends of the battery cell shell 211 along the second direction Y.

[0229] In an embodiment, one third structural member 22 and one single battery cell 21 form a heat dissipation assembly, and a plurality of heat dissipation assemblies are stacked along the first direction X.

[0230] Optionally, in the two adjacent heat dissipation assemblies, the two single battery cells 21 are arranged adjacent to each other, and the two third structural members 22 are respectively located on both sides of the two adjacent single battery cells 21. Optionally, in the two adjacent heat dissipation assemblies, the single battery cell 21 in one heat dissipation assembly is arranged adjacent to the third structural member 22 in the other heat dissipation assembly (not shown in the figure), and along the first direction X, one single battery cell 21 is located between the two third structural members 22, which can improve the heat dissipation efficiency of the single battery cell 21.

[0231] In an embodiment, the outer surface of the third structural member 22 comprises a metal material with good heat conduction performance, which is conducive to heat dissipation. In an embodiment, the third structural member 22 is made of a material with good heat conduction performance, such as aluminum. In an embodiment, the third structural member 22 is formed by one-time casting. In an embodiment, the third structural member 22 is made by bending a profile.

[0232] In summary, in the electrochemical device 100 of this application, by disposing the first structural member 32 with the first channel 321 on at least a portion of the surface of the adapter plate 31 and connecting the adapter plate 31 and the electrode terminal 213, the heat dissipation efficiency of the first structural member 32 can be improved, the heat exchange efficiency between the electrode terminal 213 and the first structural member 32 can be improved, thereby improving the heat dissipation rate of the single cell 21, improving the heat dissipation rate of the cell assembly 20 and the electrochemical device 100, and reducing the impact of temperature rise on the charge and discharge performance of the electrochemical device 100.

[0233] Example 2:

[0234] like Figure 24 As shown, Embodiment 2 of this application provides an electrical device 200, including the electrochemical device 100 described in any embodiment of Embodiment 1, which can provide electrical energy to the electrical device 200.

[0235] In one embodiment, the electrical equipment 200 includes, but is not limited to, any one of a drone, an electric two-wheeler, an electric vehicle, a home appliance, and a robot.

[0236] In the electrical equipment 200 of this application, the electrochemical device 100 can improve the heat dissipation rate of the electrochemical device 100, reduce the impact of continuous discharge temperature rise on the discharge performance of the electrochemical device 100, and reduce the impact of the temperature rise of the electrochemical device 100 on the electrical equipment 200 by disposing the first structural member 32 with the first channel 321 on at least a part of the surface of the adapter plate 31.

[0237] Example 3:

[0238] like Figure 25 As shown, Embodiment 3 of this application provides a method for fabricating an electrochemical device, including the following steps:

[0239] S 1. Provide a battery cell assembly, the battery cell assembly includes multiple individual battery cells, the multiple individual battery cells are stacked along a first direction, each individual battery cell includes a battery cell housing and an electrode terminal, the electrode terminal is connected to the battery cell housing;

[0240] S2. Provide an adapter assembly, the adapter assembly includes an adapter plate and a first structural component, the first structural component includes an insulating material, the first structural component is formed by injecting the insulating material into the side of the adapter plate and then curing it, the first structural component is provided with a first channel;

[0241] S3. Assemble the adapter assembly and the cell assembly, wherein the first structural member connects at least a portion of the adapter plate and the electrode terminals;

[0242] S4. Provide a first housing and assemble the adapter assembly and the cell assembly into the first housing.

[0243] In one embodiment, the first structural member is formed by injection molding an insulating material to the side of the adapter plate and then curing.

[0244] In one embodiment, the first housing is provided with a first through hole and a second through hole, and the first channel communicates the first through hole and the second through hole.

[0245] The electrochemical device made by the method can improve the heat dissipation efficiency of the first structural member, improve the heat exchange efficiency between the electrode terminal and the first structural member, and then improve the heat dissipation rate of the single battery cell, improve the heat dissipation rate of the battery cell assembly and the electrochemical device, and reduce the influence of temperature rise on the charge and discharge performance of the electrochemical device.

[0246] In addition, those skilled in the art can make other changes within the spirit of the present application, of course, these changes made according to the spirit of the present application should be included in the scope disclosed by the present application.

Claims

1. An electrochemical device, characterized in that, include: First shell; A battery cell assembly is disposed within the first housing. The battery cell assembly includes multiple individual battery cells stacked along a first direction. Each individual battery cell includes a battery cell housing and electrode terminals, and the electrode terminals are connected to the battery cell housing. An adapter assembly is disposed within a first housing. The adapter assembly includes a first side and a second side that are opposite to each other along a second direction. The battery cell housing is located on the first side of the adapter assembly, and the second direction is perpendicular to the first direction. The adapter assembly has a third through hole. The adapter assembly includes an adapter plate and a first structural member. The first structural member includes an insulating material and covers at least a portion of the surface of the adapter plate. The first structural member has a first channel along the second direction, and the projection of the first channel is located between the projections of two adjacent third through holes. The first structural member connects at least a portion of the adapter plate and the electrode terminal, and a portion of the electrode terminal is located above the first channel. The first structural member includes a plurality of first protrusions, which are disposed on a first side of the adapter assembly. The first channel passes through the first protrusions. The electrode terminal passes through the third through hole from the first side and extends out from the second side. The electrode terminal extending out from the second side is connected to the adapter assembly. The first housing includes a first wall and a second wall. The first wall has a first through hole, and the second wall has a second through hole. The first channel connects the first through hole and the second through hole.

2. The electrochemical device as described in claim 1, characterized in that, The first structural component is formed on at least a portion of the surface of the adapter plate by injection molding.

3. The electrochemical device as described in claim 1, characterized in that, The adapter plate includes a first circuit board, and the adapter assembly includes a conductive element disposed on the first circuit board. A portion of the conductive element is exposed in the first structural member, and the electrode terminal is connected to the conductive element.

4. The electrochemical device as described in claim 3, characterized in that, The electrochemical device further includes a heat-conducting element that connects the first structural component and the electrode terminals.

5. The electrochemical device as described in claim 4, characterized in that, The thermally conductive component includes potting compound.

6. The electrochemical device as described in claim 3, characterized in that, Along the second direction, the first protrusion is disposed between the adapter plate and the battery cell housing, and along the first direction, the third through hole is disposed between two adjacent first protrusions.

7. The electrochemical device according to any one of claims 1 to 6, characterized in that, Multiple battery cells are stacked along a first direction. The first housing is provided with a second channel through which cooling material can pass. Along a second direction perpendicular to the first direction, the adapter plate is located between the second channel and the battery cell housing. The first housing has a first chamber, the battery cell assembly and the adapter assembly are located in the first chamber, and the second channel is separate from the first chamber.

8. The electrochemical device as described in claim 7, characterized in that, The electrochemical device also includes: A second housing, connected to the first housing, the second housing having a second chamber; and, A second circuit board is disposed in the second cavity and is connected to the battery cell assembly; Along the second direction, the second channel is located between the second circuit board and the adapter assembly.

9. The electrochemical device as described in claim 8, characterized in that, The adapter assembly further includes a first output terminal disposed on the adapter plate, a portion of the first output terminal being located in the second chamber and connected to the second circuit board, and the first output terminal being separate from the second channel.

10. An electrical appliance, characterized in that, Includes the electrochemical device as described in any one of claims 1 to 9.

11. A method for manufacturing an electrochemical device, characterized in that, Including the following steps: A battery cell assembly is provided, the battery cell assembly including a plurality of individual battery cells stacked along a first direction, each individual battery cell including a battery cell housing and an electrode terminal, the electrode terminal being connected to the battery cell housing; An adapter assembly is provided, the adapter assembly including a first side and a second side that are opposite to each other along a second direction, the battery cell housing being located on the first side of the adapter assembly, the second direction being perpendicular to the first direction; the adapter assembly having a third through hole; the adapter assembly including an adapter plate and a first structural member, the first structural member including an insulating material, the first structural member being formed by pouring the insulating material into the side of the adapter plate and then curing it, the first structural member having a first channel along the second direction, the projection of the first channel being located between the projections of two adjacent third through holes; The adapter assembly and the battery cell assembly are assembled. The first structural member connects at least a portion of the adapter plate and the electrode terminal, with the portion of the electrode terminal located above the first channel. The first structural member includes a plurality of first protrusions, which are disposed on a first side of the adapter assembly, and the first channel passes through the first protrusions. The electrode terminal passes through the third through hole from the first side and extends out from the second side, with the electrode terminal extending out from the second side connected to the adapter assembly. A first housing is provided, comprising a first wall having a first through hole and a second wall having a second through hole. The adapter assembly and the battery cell assembly are assembled into the first housing, such that the first channel communicates with the first through hole and the second through hole.

12. The method for manufacturing the electrochemical device as described in claim 11, characterized in that, The first structural component is formed by injection molding the insulating material onto the side of the adapter plate and then curing it.

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