Battery pack, charging system and electric device

Abstract

The application discloses a battery pack, a charging system and a power consumption device. The battery pack comprises a first shell, a battery cell assembly and a first insulating piece. The first shell is provided with a first through hole and a second through hole, and the first through hole and the second through hole can pass cooling substances. The battery cell assembly is arranged in the first shell, and comprises a plurality of battery cell units. The battery cell unit comprises a battery cell shell and an electrode terminal, and the electrode terminal is arranged in the battery cell shell and extends out of the battery cell shell. The first insulating piece is arranged in the first shell, and is connected with the plurality of electrode terminals. Heat on the plurality of battery cell units can be transmitted to the first insulating piece through the electrode terminals. The first insulating piece is provided with a first channel penetrating through the first insulating piece. The first channel is communicated with the first through hole and the second through hole. Cooling substances outside the battery pack can flow in the first channel, and at least part of the heat can be taken away, so that the heat dissipation rate of the battery pack is improved, and the influence of temperature rise on the charging and discharging performance of the battery pack is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery pack, and particularly relates to a battery pack, a charging system and a power consumption equipment. BACKGROUND

[0002] The battery cell module in the battery pack usually contains a plurality of stacked battery cells. When the battery pack is charged and discharged for a long time, the temperature of the battery cells is high, which affects the charge and discharge performance of the battery cell module. SUMMARY

[0003] In view of the above, it is necessary to provide a battery pack to improve the heat dissipation rate of the battery cell module and reduce the influence of temperature rise on the charge and discharge performance of the battery cell module.

[0004] Embodiments of the present application provide a battery pack, which comprises a first shell, a battery cell assembly and a first insulating piece. The first shell is provided with a first through hole and a second through hole, and the first through hole and the second through hole can pass through cooling substances. The battery cell assembly is arranged in the first shell, and the battery cell assembly comprises a plurality of battery cell units. The battery cell unit comprises a battery cell shell and an electrode terminal, and the electrode terminal is arranged in the battery cell shell and protrudes from the battery cell shell. The first insulating piece is arranged in the first shell, and the first insulating piece is connected with the plurality of electrode terminals. The first insulating piece is provided with a first channel penetrating through the first insulating piece, and the first channel is communicated with the first through hole and the second through hole.

[0005] The battery pack described above connects the plurality of electrode terminals through the first insulating piece, so that the heat on the plurality of battery cell units is transmitted to the first insulating piece through the electrode terminals. The first channel penetrating through the first insulating piece and communicated with the first through hole and the second through hole is arranged on the first insulating piece, so that the cooling substances outside the battery pack can flow in the first channel to take away the heat, thereby improving the heat dissipation rate of the battery pack and reducing the influence of temperature rise on the charge and discharge performance of the battery pack.

[0006] In some embodiments of the present application, the battery pack further comprises a first heat-conducting piece, and the first heat-conducting piece fills at least part of the gap between the first insulating piece and the electrode terminal.

[0007] The first heat-conducting piece described above is beneficial to improving the heat transfer efficiency between the electrode terminal and the first insulating piece and improving the heat dissipation efficiency of the battery cell unit.

[0008] In some embodiments of the present application, the plurality of battery cell units are stacked along a first direction; the first shell comprises a first wall and a second wall, the first wall and the second wall are oppositely arranged along a second direction perpendicular to the first direction, the first through hole penetrates through the first wall, and the second through hole penetrates through the second wall.

[0009] The first through hole and the second through hole are arranged on the first wall and the second wall respectively, so that the cooling medium outside the battery pack can pass through the first through hole, the first channel and the second through hole, and the heat dissipation efficiency of the first insulating member is further improved, the heat dissipation rate of the battery pack is improved, and the influence of temperature rise on the charging and discharging performance of the battery pack is reduced.

[0010] In some embodiments of the present application, the first insulating member comprises a first bottom plate, and the first bottom plate is provided with a fifth through hole penetrating therethrough, and at least one of the plurality of electrode terminals is arranged on a side of the first bottom plate away from the cell shell through the fifth through hole.

[0011] The electrode terminal passing through the fifth through hole can improve the stability of the first insulating member in connecting the electrode terminal and improve the anti-vibration performance of the battery pack.

[0012] In some embodiments of the present application, the plurality of cell units are arranged in a first direction; the first insulating member comprises a plurality of first channels and a plurality of fifth through holes, and the plurality of fifth through holes are arranged in the first direction in a spaced manner, and the plurality of first channels are arranged in the first direction in a spaced manner, and one first channel is arranged between two adjacent fifth through holes, so that the heat dissipation efficiency is improved, the temperature difference between different cell units is reduced, and the influence of temperature rise on the charging and discharging performance of the battery pack is reduced.

[0013] In some embodiments of the present application, the first insulating member further comprises a plurality of first protrusions arranged in the first direction in a spaced manner, the plurality of first protrusions are arranged between the first bottom plate and the cell shell and extend in a third direction perpendicular to the first direction; one fifth through hole is arranged between two adjacent first protrusions; and the cross-sectional area of each first protrusion gradually increases in the third direction, and two adjacent first protrusions form a substantially conical structure, which plays a guiding role when the electrode terminal penetrates into the fifth through hole from the first side, thereby improving the assembly efficiency.

[0014] In some embodiments of the present application, the first channel penetrates the first protrusion, so that the surface area of the first insulating member is increased, the heat dissipation efficiency of the first insulating member is improved, and the heat dissipation efficiency of the cell unit through the first insulating member is improved.

[0015] In some embodiments of the present application, the battery pack further comprises a conductive member arranged on the first bottom plate and exposed on a side of the first bottom plate away from the cell shell, and at least one of the plurality of electrode terminals is connected to the conductive member after penetrating through the fifth through hole.

[0016] In some embodiments of the present application, the conductive member and the first insulating member are integrally formed by injection molding, which is beneficial to simplify the assembly process and improve the assembly efficiency.

[0017] In some embodiments of the present application, the first insulating member comprises a first bottom plate, and the first bottom plate has a first side and a second side away from each other, and the cell shell is located on the first side of the first bottom plate.

[0018] In some embodiments of this application, the battery pack further includes a connector disposed on the first insulating member and electrically connected to the conductive member.

[0019] In some embodiments of this application, the connector and the first insulating member are integrally molded by injection molding, which helps to simplify the assembly process and improve assembly efficiency.

[0020] In some embodiments of this application, the battery pack further includes a first circuit board, with conductive components disposed on the first circuit board. The first circuit board and the first insulating component are integrally formed by injection molding, which helps to simplify the assembly process and improve assembly efficiency.

[0021] In some embodiments of this application, the first circuit board includes a printed circuit board (PCB), and multiple wires are disposed on the first circuit board.

[0022] In some embodiments of this application, the battery pack further includes a first output terminal and a second output terminal, which are disposed on a first insulating member and electrically connected to a conductive member.

[0023] In some embodiments of this application, the first output terminal and the second output terminal are integrally formed with the first insulating component by injection molding, which helps to simplify the assembly process and improve assembly efficiency.

[0024] In some embodiments of this application, the battery pack further includes a second insulating member disposed on the side of the first insulating member opposite to the cell housing. The second insulating member includes a first hole and a second hole, with the first output terminal passing through the first hole and the second output terminal passing through the second hole. The second insulating member serves to protect and insulate, reducing the risk of damage to structural components on the first insulating member. For example, the second insulating member can protect electrode terminals and connectors.

[0025] In some embodiments of this application, the battery pack further includes a second housing and a second circuit board. The second housing is connected to the first housing and has a second chamber, with the second circuit board located within the second chamber. In one embodiment, the second housing is connected to a top wall, forming the second chamber with the top wall, which is located between the first and second chambers. The second circuit board is connected to the battery cell assembly and can control the charging and discharging of the battery cell assembly.

[0026] The second circuit board includes a BMS (Battery Management System) component, which comprises multiple electronic components capable of performing functions such as data acquisition, control, protection, communication, power calculation, signal transmission, and power transmission for the battery cell unit.

[0027] In some embodiments of this application, multiple battery cell units are stacked along a first direction; the first housing includes a third wall and a fourth wall opposite to each other along the first direction, the third wall having a third through hole and the fourth wall having a fourth through hole, the third through hole and the fourth through hole allowing cooling material to pass through; the number of battery cell assemblies is multiple, and the multiple battery cell assemblies are arranged along a second direction perpendicular to the first direction; the battery pack also includes a first structural member, the first structural member being disposed between two adjacent battery cell assemblies and connecting the two adjacent battery cell assemblies, the first structural member including a second channel, the second channel communicating with the third through hole and the fourth through hole.

[0028] The aforementioned third through hole, second channel, and fourth through hole can form a heat dissipation channel for the cooling material to pass through, so that the cooling material outside the first housing passes through the second channel and carries away at least part of the heat on the first structural component. This can improve the heat dissipation efficiency of the first structural component, improve the heat dissipation efficiency of the battery pack, reduce the temperature difference between the cells in the battery pack, and reduce the impact of temperature rise on the charging and discharging performance of the battery pack.

[0029] In one embodiment, the outer surface of the first structural member is made of a metal material with good thermal conductivity, which is beneficial for heat dissipation.

[0030] In one embodiment, the first structural member is made of a metal with good thermal conductivity, such as aluminum.

[0031] Embodiments of this application also provide a charging system, including a charging box and a battery pack as described in any of the above embodiments. The charging box includes a chamber, in which at least a portion of the battery pack is housed, and a first channel communicates with the chamber. The charging box has a first opening and a second opening, and the first through-hole, the first channel, and the second through-hole communicate with the first opening and the second opening. Cooling material can circulate between the first through-hole and the chamber, improving the heat dissipation efficiency of the battery pack, reducing the impact of temperature rise on the charging performance of the battery pack, and shortening the charging time of the battery pack.

[0032] In some embodiments of this application, both the first opening and the second opening connect the chamber and the external space of the charging box. The charging system also includes a cooling device located at the first opening, which can accelerate the gas flow between the chamber and the external space.

[0033] The aforementioned air-cooling device can blow gas from outside the charging box into the chamber or extract gas from inside the chamber, thereby increasing the gas exchange rate between the inside and outside of the chamber and further improving the heat dissipation efficiency of the battery pack.

[0034] In some embodiments of this application, a gas channel is provided between the battery pack and the inner wall of the charging box, and the gas channel connects the first opening and the second opening. When gas flows through the chamber, it can flow along the gas channel, thereby carrying away some of the heat from the first housing and improving the heat dissipation efficiency of the battery pack.

[0035] In some embodiments of this application, the charging system further includes a coolant that can flow between the first through hole, the first channel, and the second through hole.

[0036] Embodiments of this application also provide an electrical device including the battery pack described in any of the above embodiments.

[0037] The aforementioned electrical equipment is powered by a battery pack. The battery pack is connected to multiple electrode terminals through a first insulating member, allowing heat from multiple battery cells to be transferred to the first insulating member through the electrode terminals. A first channel connecting the first through hole and the second through hole is provided on the first insulating member, allowing cooling material outside the battery pack to pass through the first channel, thereby removing at least some of the heat, improving the heat dissipation rate of the battery pack, reducing the impact of continuous discharge temperature rise on the discharge performance of the battery pack, and improving the economic efficiency of the electrical equipment. Attached Figure Description

[0038] Figure 1 This is a first view of a battery pack in one embodiment of this application.

[0039] Figure 2 This is a second view of the battery pack in one embodiment of this application.

[0040] Figure 3 This is an exploded view of the battery pack in one embodiment of this application.

[0041] Figure 4 This is a schematic diagram of a certain state of the battery cell unit before the electrode assembly is encapsulated in one embodiment of this application.

[0042] Figure 5 This is a schematic diagram of the battery cell unit in one embodiment of this application.

[0043] Figure 6 This is a first view of the first insulating element in one embodiment of this application.

[0044] Figure 7 yes Figure 6 View of section VII-VII.

[0045] Figure 8 This is a schematic diagram of the structure of the connector, the first output terminal, and the second output terminal connected to the first insulating member in one embodiment of this application.

[0046] Figure 9 This is a schematic diagram of the structure of the conductive element connecting the first circuit board in one embodiment of this application.

[0047] Figure 10 This is a schematic diagram of the connection between the battery cell assembly and the first insulating element in one embodiment of this application.

[0048] Figure 11 yes Figure 10 The diagram shows the structure connected to the second insulating component.

[0049] Figure 12 yes Figure 11 Exploded view of the structure shown.

[0050] Figure 13 This is a schematic diagram of the structure of the second insulating element in one embodiment of this application.

[0051] Figure 14 yes Figure 1 The battery pack shown is a cross-sectional view (AA section).

[0052] Figure 15 yes Figure 14 An enlarged view of region I in the structure shown.

[0053] Figure 16 yes Figure 1 The BB cross-sectional view of the battery pack shown.

[0054] Figure 17 yes Figure 15 The diagram shows the structure of the area shown without thermally conductive adhesive.

[0055] Figure 18 This is a first view of a cell assembly in one embodiment of this application.

[0056] Figure 19 yes Figure 18 Exploded view of the battery cell assembly.

[0057] Figure 20 This is a first view of a charging system in one embodiment of this application.

[0058] Figure 21 This is a second view of a charging system in one embodiment of this application.

[0059] Figure 22 yes Figure 20 The CC section view of the charging system shown.

[0060] Figure 23 This is a schematic diagram of the structure of an electrical device in one embodiment of this application.

[0061] Explanation of main component symbols

[0062] Battery pack 100

[0063] First shell 10

[0064] First Wall 11

[0065] First through hole 111

[0066] Second Wall 12

[0067] Second through hole 121

[0068] Third Wall 13

[0069] Third through hole 131

[0070] Fourth Wall 14

[0071] Fourth through hole 141

[0072] Top wall 15

[0073] Bottom wall 16

[0074] First chamber 17

[0075] Second shell 90

[0076] Second chamber 91

[0077] Battery cell assembly 20

[0078] Cell Unit 21

[0079] Cell casing 211

[0080] Part 1 2111

[0081] Part Two 2112

[0082] Main body 2113

[0083] Edge banding 2114

[0084] Top edge sealing 21141

[0085] Side sealing 21142

[0086] Electrode terminal 212

[0087] Positive electrode terminal 2121

[0088] Negative electrode terminal 2122

[0089] Electrode assembly 213

[0090] Second structural component 22

[0091] Third base plate 221

[0092] Second side wall 222

[0093] Third side wall 223

[0094] First insulating component 31

[0095] First Channel 311

[0096] First base plate 312

[0097] First side 3121

[0098] Second side 3122

[0099] Fifth through hole 3123

[0100] first convex portion 313

[0101] Second circuit board 41

[0102] First circuit board 43

[0103] First heat-conducting component 51

[0104] Conductive component 42

[0105] Wire harness 61

[0106] Connector 62

[0107] First terminal 621

[0108] Second terminal 622

[0109] First output terminal 63

[0110] Second output terminal 64

[0111] Second insulating component 32

[0112] Second base plate 321

[0113] First hole 3211

[0114] Second hole 3212

[0115] Third hole 3213

[0116] First side wall 322

[0117] First structural component 81

[0118] Second Channel 811

[0119] Charging system 200

[0120] Charging box 210

[0121] First outer wall 2101

[0122] First opening 21011

[0123] Second outer wall 2102

[0124] Second opening 21021

[0125] Third outer wall 2103

[0126] Third opening 21031

[0127] Fourth outer wall 2104

[0128] Fifth outer wall 2105

[0129] Sixth outer wall 2106

[0130] Gas channel 220

[0131] Second Zone 2201

[0132] Third District 2202

[0133] Fourth District 2203

[0134] Fifth District 2204

[0135] Support section 230

[0136] Charging dock 240

[0137] 300 electrical appliances

[0138] First direction X

[0139] Second direction Y

[0140] Third direction Z

[0141] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0142] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0143] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or may also have a component positioned in between. When a component is considered to be "set" on another component, it can be directly set on the other component or may also have a component positioned in between. When the quantity of a component is defined as "multiple," it means that the quantity of the component is a natural number greater than 1.

[0144] 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 herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0145] Embodiments of this application provide a battery pack, including a first housing, a cell assembly, and a first insulating member. The first housing has a first through hole and a second through hole, through which a cooling material can pass. The cell assembly is disposed within the first housing and includes multiple cell units. Each cell unit includes a cell housing and electrode terminals, with the electrode terminals disposed within and extending beyond the cell housing. The first insulating member is disposed within the first housing and connects to the multiple electrode terminals. The first insulating member has a through first channel that connects the first through hole and the second through hole.

[0146] The aforementioned battery pack connects multiple electrode terminals through a first insulating member, allowing heat from multiple battery cells to be transferred to the first insulating member through the electrode terminals. Furthermore, a first channel connecting the first through hole and the second through hole is provided on the first insulating member, allowing cooling materials outside the battery pack to pass through the first channel, thereby carrying away at least some of the heat, improving the heat dissipation efficiency of the first insulating member, increasing the heat dissipation rate of the battery pack, and reducing the impact of temperature rise on the charging and discharging performance of the battery pack.

[0147] The embodiments of this application will be further described below with reference to the accompanying drawings.

[0148] Example 1:

[0149] like Figure 1 , Figure 2 and Figure 3 As shown, Embodiment 1 of this application provides a battery pack 100, including a first housing 10, a cell assembly 20, and a first insulating member 31. The cell assembly 20 and the first insulating member 31 are disposed within the first housing 10. The first housing 10 has a first through hole 111 and a second through hole 121, which allow cooling materials to pass through. The cell assembly 20 includes a plurality of cell units 21, each cell unit 21 including a cell housing 211 and an electrode terminal 212, the electrode terminal 212 being disposed in the cell housing 211 and extending out of the cell housing 211. The first insulating member 31 connects the plurality of electrode terminals 212, and the first insulating member 31 has a through first channel 311, which connects the first through hole 111 and the second through hole 121.

[0150] The aforementioned battery pack 100 is connected to multiple electrode terminals 212 via a first insulating member 31, allowing heat from multiple battery cell units 21 to be transferred to the first insulating member 31 through the electrode terminals 212. Furthermore, a first channel 311 is provided on the first insulating member 31, connecting the first through hole 111 and the second through hole 121, allowing cooling materials outside the battery pack 100 to pass through the first channel 311, thereby carrying away at least some of the heat, improving the heat dissipation efficiency of the first insulating member 31, increasing the heat dissipation rate of the battery pack 100, and reducing the impact of temperature rise on the charging and discharging performance of the battery pack 100.

[0151] In one embodiment, the cooling agent includes at least one of air, coolant, and coolant liquid.

[0152] In one embodiment, the first insulating element 31 is made of an insulating material with good thermal conductivity, which is beneficial for heat conduction and improves the heat dissipation rate of the battery cell assembly 20. In one embodiment, the material selected for the first insulating element 31 is a mixture, which is 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.

[0153] In one embodiment, the first housing 10 includes a first wall 11, a second wall 12, a third wall 13, a fourth wall 14, a top wall 15, and a bottom wall 16. The third wall 13 and the fourth wall 14 are arranged in a specific order, the first wall 11 and the second wall 12 are arranged in a specific order, and the top wall 15 and the bottom wall 16 are arranged in a specific order. The top wall 15 and the bottom wall 16 are both 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 top wall 15, and the bottom wall 16 are connected to form a first chamber 17. The battery cell assembly 20 and the first insulating member 31 are disposed in the first chamber 17.

[0154] To better illustrate the structure of the battery pack 100, the structure of the battery pack 100 will be described using the X, Y, and Z coordinate axes. The X, Y, and Z coordinate axes are perpendicular to each other. The X direction is defined as the first direction, the Y direction as the second direction, and the Z direction 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 first wall 11 and the second wall 12 are arranged, and the third direction Z is the direction in which the top wall 15 and the bottom wall 16 are arranged.

[0155] In one embodiment, the battery pack 100 further includes a second housing 90 and a second circuit board 41. The second housing 90 is connected to the first housing 10 and has a second chamber 91. The second circuit board 41 is located within the second chamber 91. In one embodiment, the second housing 90 is connected to a top wall 15, and the second housing 90 and the top wall 15 form the second chamber 91. The top wall 15 is located between the first chamber 17 and the second chamber 91. The second circuit board 41 is connected to the cell assembly 20 and can control the charging and discharging of the cell assembly 20.

[0156] In one embodiment, the second circuit board 41 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 battery cell unit 21.

[0157] In one embodiment, along the third direction Z, the first insulating member 31 is disposed between the cell housing 211 and the top wall 15. The first insulating member 31 is connected to the top wall 15. Some of the heat in the second chamber 91 can be transferred to the first insulating member 31 through the top wall 15, which is beneficial to the heat dissipation of the second chamber 91 and reduces the impact of the temperature rise in the second chamber 91 on the second circuit board 41.

[0158] In one embodiment, multiple battery cell units 21 are stacked along a first direction X. The electrode terminals 212 of the multiple battery cell units 21 are connected by a first insulating member 31, which can improve the heat dissipation effect of the stacked battery cell assembly 20, reduce the temperature difference of the multiple battery cell units 21 in the battery cell assembly 20, and reduce the impact of temperature rise on the charging and discharging performance of the battery cell assembly 20.

[0159] In one embodiment, there are multiple first channels 311, which are arranged along the first direction X. This is beneficial to improve the heat dissipation efficiency of the first insulating member 31, improve the heat dissipation effect of the battery cell assembly 20, reduce the temperature difference of multiple battery cell units 21, and reduce the impact of temperature rise on the charging and discharging performance of the battery cell assembly 20.

[0160] In one embodiment, along the second direction Y, the first through hole 111 penetrates the first wall 11, and the second through hole 121 penetrates the second wall 12. The first through hole 111, the first channel 311, and the second through hole 121 form a heat dissipation channel through which the cooling material can pass. The cooling material outside the first housing 10 passes through the channel, which can remove at least part of the heat on the first insulating member 31 and reduce the temperature of the cell assembly 20.

[0161] In one embodiment, there is one first through hole 111, which connects to a plurality of first channels 311. Optionally, the first through hole 111 connects to all the first through holes 111. In other embodiments, there are multiple first through holes 111 (not shown), which are arranged at intervals along a first direction X, and one first through hole 111 connects to at least one first channel 311. In one embodiment, there are multiple first through holes 111 (not shown), which are arranged at intervals along a first direction X, and one first through hole 111 connects to one first channel 311.

[0162] In one embodiment, there is one second through hole 121, which connects to a plurality of first channels 311. Optionally, the second through hole 121 connects to all the first through holes 111. In other embodiments, there are multiple second through holes 121 (not shown), which are arranged at intervals along a first direction X, and one second through hole 121 connects to at least one first channel 311. In one embodiment, there are multiple second through holes 121 (not shown), which are arranged at intervals along a first direction X, and one second through hole 121 connects to one first channel 311.

[0163] like Figure 4 and Figure 5 As shown, the battery cell unit 21 further includes an electrode assembly 213, which is disposed inside the battery cell housing 211. A portion of the electrode terminal 212 is located inside the battery cell housing 211 and connected to the electrode assembly 213, while a portion of the electrode terminal 212 extends out of the battery cell housing 211. In one embodiment, the electrode assembly 213 includes a positive electrode plate, a negative electrode plate, and a separator (not shown). The separator is disposed between the positive and negative electrode plates. The positive electrode plate, separator, and negative electrode plate are wound or stacked to form the electrode assembly 213.

[0164] 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, an internal space capable of accommodating the electrode assembly 213 can be formed. In another embodiment, the cell housing 211 includes a first portion and a second portion (not shown) that are separated from each other. When the first portion and the second portion are connected, an internal space capable of accommodating the electrode assembly 213 can be formed.

[0165] In one embodiment, the cell housing 211 includes a main body portion 2113 and a sealing portion 2114 interconnected. The sealing portion 2114 extends from the main body portion 2113, and the electrode assembly 213 is housed within the main body portion 2113. The electrode terminal 212 extends out of the cell housing 211 from the sealing portion 2114. In another embodiment, the sealing portion 2114 includes a top sealing edge 21141 and a side sealing edge 21142 interconnected. The top sealing edge 21141 is located at the end of the main body portion 2113 along a third direction Z, and the side sealing edge 21142 is located at the end of the main body portion 2113 along a second direction Y. The electrode terminal 212 extends out of the cell housing 211 from the top sealing edge 21141. In one embodiment, there are two side seals 21142, which are located at opposite ends of the main body 2113 along the second direction Y. The top seal 21141 is located between the two side seals 21142 and connects the two side seals 21142.

[0166] Electrode terminals 212 include a positive electrode terminal 2121 and a negative electrode terminal 2122. The positive electrode terminal 2121 is connected to the positive electrode plate, and the negative electrode terminal 2122 is connected to the negative electrode plate. In one embodiment, the positive electrode terminal 2121 and the negative electrode terminal 2122 are located on the same side of the cell housing 211. In another embodiment, the positive electrode terminal 2121 and the negative electrode terminal 2122 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 2121 and the negative electrode terminal 2122 are located on the same side of the cell housing 211.

[0167] Please refer to the following: Figure 3 and Figure 5 Positive electrode terminal 2121 and negative electrode terminal 2122 are spaced apart along the second direction Y. Both positive electrode terminal 2121 and negative electrode terminal 2122 are connected to the first insulating member 31. The first channel 311 extends along the second direction Y. When the cooling material passes through the first channel 311, it can carry away at least part of the heat generated by the positive electrode terminal 2121 and negative electrode terminal 2122, thereby improving the heat dissipation efficiency.

[0168] In one embodiment, along the first direction X, the electrode terminals 212 on different cell units 21 are arranged opposite to each other, and a first channel 311 is provided between two adjacent electrode terminals 212. The cooling material through the first channel 311 can remove at least part of the heat generated by the two adjacent electrode terminals 212, thereby improving heat dissipation efficiency. In one embodiment, the provision of a first channel 311 between two adjacent cell units 21 along the first direction X can improve heat dissipation efficiency, reduce the temperature difference between different cell units 21, and reduce the impact of temperature rise on the charge and discharge performance of the battery pack 100.

[0169] like Figure 3 and Figure 6 As shown, in one embodiment, the first insulating member 31 includes a first base plate 312, the first base plate 312 having a first side 3121 and a second side 3122 that are opposite to each other, the cell housing 211 is located on the first side 3121 of the first base plate 312, and the top wall 15, the second circuit board 41 and the second housing 90 are located on the second side 3122 of the first base plate 312. In one embodiment, the first channel 311 is located on the first side 3121 of the first base plate 312.

[0170] In one embodiment, the first base plate 312 is provided with a plurality of through fifth through holes 3123, through which electrode terminals 212 can pass from the first side 3121 of the first base plate 312 and exit from the second side 3122 of the first base plate 312. In one embodiment, the plurality of fifth through holes 3123 are arranged at intervals along a first direction X, and two adjacent electrode terminals 212 along the first direction X pass through different fifth through holes 3123 and are then bent towards each other to connect, so that two adjacent battery cells 21 are connected. Optionally, the two interconnected electrode terminals 212 are connected by welding.

[0171] In one embodiment, a plurality of fifth through holes 3123 are arranged along a first direction X to form a row of fifth through holes 3123, and multiple rows of fifth through holes 3123 are arranged along a second direction Y.

[0172] In one embodiment, the positive electrode terminal 2121 and the negative electrode terminal 2122 of the same cell unit 21 pass through different fifth through holes 3123, which can reduce the risk of short circuit due to electrical connection between the positive electrode terminal 2121 and the negative electrode terminal 2122 of the same cell unit 21.

[0173] In one embodiment, the fifth through hole 3123 extends along the second direction Y, and the positive electrode terminal 2121 and the negative electrode terminal 2122 of the same cell unit 21 pass through the same fifth through hole 3123 (not shown).

[0174] In one embodiment, along the first direction X, a first channel 311 is disposed between two adjacent fifth through holes 3123. Optionally, along the first direction X, a first channel 311 is disposed between two adjacent fifth through holes 3123.

[0175] like Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, in one embodiment, the first insulating member 31 further includes a plurality of first protrusions 313, which are disposed on the first base plate 312 and located on the first side 3121. The first protrusions 313 extend along the third direction Z. Along the first direction X, the fifth through hole 3123 is located between two adjacent first protrusions 313. Along the third direction Z, the cross-sectional area of ​​each first protrusion 313 gradually increases, so that two adjacent first protrusions 313 form a generally conical structure, which plays a guiding role when the electrode terminal 212 passes through the fifth through hole 3123 from the first side 3121, thereby improving assembly efficiency.

[0176] In one embodiment, a first channel 311 extends through a first protrusion 313 along the second direction Y, which increases the surface area of ​​the first insulating member 31, improves the heat dissipation efficiency of the first insulating member 31, and enhances the heat dissipation efficiency of the battery cell 21 through the first insulating member 311. Optionally, each first protrusion 313 is provided with a first channel 311. The first channel 311 extends through the first protrusion 313 along the second direction Y, which reduces the resistance of the cooling material through the first channel 311, increases the flow rate of the cooling material through the first channel 311, and enhances the heat dissipation efficiency of the first insulating member 31 and the battery cell 21.

[0177] Please refer to the following: Figure 3 , Figure 6 , Figure 8 , Figure 9 and Figure 10 In one embodiment, the battery pack 100 further includes a conductive element 42, which is disposed on the first base plate 312 and exposed on the second side 3122 of the first base plate 312. Along the first direction X, the conductive element 42 is disposed between two adjacent fifth through holes 3123. Electrode terminals 212 extending from the fifth through holes 3123 onto the second side 3122 are bent toward the conductive element 42 and connected to it. In one embodiment, two mutually bent and connected electrode terminals 212 are connected to the same conductive element 42. In one embodiment, along the third direction Z, two interconnected electrode terminals 212 and the conductive element 42 are stacked. In one embodiment, the two interconnected electrode terminals 212 and the conductive element 42 are connected by welding, such as laser welding or ultrasonic welding. It is understood that stacking two interconnected electrode terminals 212 on the conductive element 42 for welding can reduce the risk of welding failure and improve the quality and stability of the connection between different electrode terminals 212.

[0178] In one embodiment, there are multiple conductive elements 42, with some conductive elements 42 arranged along a first direction X and some conductive elements 42 arranged along a second direction Y.

[0179] In one embodiment, the conductive element 42 is made of a metal material with good electrical conductivity. In another embodiment, the conductive element 42 is partially embedded in the first insulating element 31 through an injection molding process, so that the conductive element 42 is connected to the first insulating element 31, which can improve production efficiency and quality. Optionally, the conductive element 42 is made of copper.

[0180] In one embodiment, the battery pack 100 further includes a wiring harness 61 and a connector 62. The connector 62 is disposed on the first insulating member 31 and connects to multiple conductive members 42. The wiring harness 61 is pluggably connected to the connector 62. The wiring harness 61 can connect to multiple conductive members 42 through the connector 62, and then connect to multiple electrode terminals 212. The wiring harness 61 is also connected to a second circuit board 41, enabling the second circuit board 41 to acquire electrical signal information of multiple battery cell units 21 through the wiring harness 61 and control the multiple battery cell units 21. In one embodiment, the electrical signal information includes voltage information, current information, and charge information. Optionally, the second circuit board 41 acquires the voltage information of the multiple battery cell units 21 through the wiring harness 61 and the connector 62.

[0181] In one embodiment, the connector 62 is disposed on the second side 3122 of the first base plate 312. In one embodiment, the connector 62 and the first insulating member 31 are integrally formed by injection molding. Optionally, the connector 62 may have a portion of its structure embedded in the first insulating member 31 through injection molding, thereby connecting the connector 62 to the first insulating member 31 and improving production efficiency and quality. In one embodiment, the connector 62 includes a connector.

[0182] In one embodiment, the battery pack 100 further includes a first output terminal 63 and a second output terminal 64, which are disposed on the first insulating member 31 and connected to different conductive members 42. Both the first output terminal 63 and the second output terminal 64 are connected to the cell assembly 20 and the second circuit board 41. One of the first output terminal 63 and the second output terminal 64 is the total positive output terminal of the cell assembly 20, and the other is the total negative output terminal of the cell assembly 20.

[0183] In one embodiment, the first output terminal 63 and the first insulating member 31 are integrally formed by injection molding. Optionally, the first output terminal 63 can be partially embedded in the first insulating member 31 by injection molding, so that the first output terminal 63 is connected to the first insulating member 31, which can improve production efficiency and quality.

[0184] In one embodiment, the second output terminal 64 and the first insulating member 31 are integrally formed by injection molding. Optionally, the second output terminal 64 can be partially embedded in the first insulating member 31 by injection molding, so that the second output terminal 64 is connected to the first insulating member 31, which can improve production efficiency and quality.

[0185] In one embodiment, the battery cell assembly 20 further includes a first circuit board 43, with a fifth through hole 3123 penetrating the first circuit board 43, and a plurality of electrode terminals 212 connected to the first circuit board 43 through the fifth through hole 3123. In one embodiment, a first insulating member 31 covers the surface of the first circuit board 43; optionally, the first insulating member 31 completely covers the first circuit board 43, or optionally, the first insulating member 31 covers a portion of the surface of the first circuit board 43. In one embodiment, the first insulating member 31 is formed on the surface of the first circuit board 43 by injection molding. In one embodiment, the portion of the first insulating member 31 covering the first circuit board 43 constitutes a first base plate 312.

[0186] In one embodiment, the first insulating member 31 is formed on a portion of the surface of the first circuit board 43 by injection molding an insulating material. In another embodiment, the first insulating member 31 is formed on a portion of the surface of the first circuit board 43 by potting an insulating material.

[0187] In one embodiment, the first circuit board 43 includes a printed circuit board (PCB) with multiple conductive lines (not shown). Optionally, the first circuit board 43 includes a flexible printed circuit board (FPC).

[0188] In one embodiment, the connector 62 is soldered to the first circuit board 43. In another embodiment, the connector 62 is connected to a plurality of conductive elements 42 via wires within the first circuit board 43.

[0189] In one embodiment, the first output terminal 63 is soldered to the first circuit board 43. In another embodiment, the second output terminal 64 is soldered to the first circuit board 43.

[0190] like Figure 11 , Figure 12 and Figure 13 As shown, the battery pack 100 also includes a second insulating member 32, which is connected to the first insulating member 31. At least a portion of the second insulating member 32 is located on the second side 3122 of the first base plate 312. The second insulating member 32 can provide protection and insulation, reducing the risk of damage to structural components on the second side 3122 of the first base plate 312. For example, the second insulating member 32 can protect the electrode terminal 212 and the connector 62.

[0191] In one embodiment, the second insulating member 32 includes a second base plate 321, which is disposed on the second side 3122 of the first base plate 312. A portion of the wire harness 61, a portion of the first output terminal 63, and a portion of the second output terminal 64 are accommodated between the first base plate 312 and the second base plate 321. A portion of the wire harness 61, a portion of the first output terminal 63, and a portion of the second output terminal 64 extend out of the second base plate 321 on the side away from the first base plate 312.

[0192] In one embodiment, the second base plate 321 is provided with a through first hole 3211 and a second hole 3212. The first output terminal 63 extends out of the first hole 3211 from the side of the second base plate 321 away from the first base plate 312, and the second output terminal 64 extends out of the second hole 3212 from the side of the second base plate 321 away from the first base plate 312.

[0193] In one embodiment, the second base plate 321 is further provided with a through third hole 3213, through which the wire harness 61 extends from the third hole 3213 on the side of the second base plate 321 away from the first base plate 312.

[0194] In one embodiment, the second insulating member 32 further includes a first sidewall 322, which is disposed at the edge of the second base plate 321 and extends from the surface of the second base plate 321 in the opposite direction of the third direction Z. In one embodiment, the projection of the first base plate 312 is located in the area enclosed by the projection of the first sidewall 322 in the third direction Z. Optionally, the inner contour of the first sidewall 322 corresponds to and is dimensionally matched with the outer contour of the first base plate 312. In the first direction X, the two ends of the first base plate 312 respectively contact and connect to the portion of the first sidewall 322, and in the second direction Y, the two ends of the first base plate 312 respectively contact and connect to the portion of the first sidewall 322. This can reduce the amount of material used to limit the first insulating member 31 and the second insulating member 32, thereby reducing the cost of the battery pack 100.

[0195] In one embodiment, the second insulating member 32 is made of an insulating material with good thermal conductivity, which is beneficial for heat dissipation and improving heat transfer with the first insulating member 31. In one embodiment, the second insulating member 32 is integrally molded by injection molding.

[0196] like Figure 14 and Figure 15As shown, in one embodiment, the battery pack 100 further includes a first heat-conducting element 51, which is disposed within the first housing 10. A portion of the first heat-conducting element 51 fills at least a portion of the gap between the first insulator 31 and the electrode terminal 212. In one embodiment, the first heat-conducting element 51 contacts and connects the first insulator 31 and the electrode terminal 212. The first heat-conducting element 51 helps improve the heat transfer efficiency between the electrode terminal 212 and the first insulator 31, thereby improving the heat dissipation efficiency of the cell unit 21. Optionally, the first heat-conducting element 51 is made of an insulating material with good thermal conductivity.

[0197] In one embodiment, along the first direction X, a portion of the top sealing edge 21141 is located between two adjacent first protrusions 313, and the projection of the top sealing edge 21141 overlaps with the projection of the first protrusion 313. A portion of the first heat-conducting element 51 fills the space between the top sealing edge 21141 and the adjacent first protrusion 313. In one embodiment, the first heat-conducting element 51 connects the top sealing edge 21141 and the adjacent first protrusion 313. The first heat-conducting element 51 helps to improve the heat exchange efficiency between the top sealing edge 21141 and the first protrusion 313, thereby increasing the heat dissipation rate of the battery cell 21.

[0198] In one embodiment, a portion of the first heat-conducting element 51 is filled between the second base plate 321 and the first base plate 312, and connects the second base plate 321, the first base plate 312 and the portion of the electrode terminal 212 extending from the second side 3122. This is beneficial to improving the heat exchange efficiency between the second base plate 321 and the electrode terminal 212, and between the second base plate 321 and the first base plate 312, thereby increasing the heat dissipation rate of the battery pack 100.

[0199] In one embodiment, a portion of the first heat-conducting element 51 fills the gap between the electrode terminal 212 and the fifth through hole 3123, which helps to improve the heat exchange efficiency between the electrode terminal 212 and the first base plate 312 and improve the heat dissipation rate of the battery cell unit 21.

[0200] In one embodiment, the first thermally conductive element 51 is formed by curing a thermally conductive adhesive. In one embodiment, the thermally conductive adhesive includes, but is not limited to, any one of ultra-high temperature thermally conductive adhesive, potting compound, silicone thermally conductive adhesive, epoxy resin AB glue, polyurethane glue, polyurethane thermally and electrically conductive adhesive, and thermally conductive silicone grease.

[0201] Please refer to the following: Figure 15 , Figure 16 and Figure 17 In one embodiment, when the battery pack 100 is partially inverted, thermally conductive adhesive is injected into the first housing 10, and the adhesive flows to the second insulating member 32 and the electrode terminal 212 under the action of gravity and then solidifies to form the first thermally conductive member 51.

[0202] In one embodiment, the first housing 10 (excluding the bottom wall 16), the battery cell assembly 20, the first insulating member 31, the second circuit board 41, and the second housing 90 are connected and inverted. The first wall 11, the second wall 12, the third wall 13, the fourth wall 14, and the top wall 15 are connected to form an upward-opening cavity space. The battery cell assembly 20 and the first insulating member 31 are located in the cavity space, and the second housing 90 is located at the bottom. Thermally conductive adhesive is poured into the cavity space. The thermally conductive adhesive can flow to the second insulating member 32 and the electrode terminal 212 under the action of gravity and then solidify to form the first thermally conductive member 51.

[0203] In one embodiment, the battery pack 100 includes two rows of battery cell assemblies 20, with a channel (not shown) between the two rows of battery cell assemblies 20, or a channel between the battery cell assembly 20 and the first housing 10. The channel communicates with a cavity space, and thermally conductive adhesive can be poured into the channel to flow into the cavity space. Optionally, the two rows of battery cell assemblies are arranged along a second direction Y.

[0204] In one embodiment, the battery pack 100 further includes a first seal (not shown), which is connected to the first sidewall 322 and the first wall 11, second wall 12, third wall 13, and fourth wall 14 around the perimeter of the first base plate 312. The first seal can provide a sealing effect, reducing the risk of thermally conductive adhesive leaking from the gap between the first sidewall 322 and the first housing 10, thus saving costs on the battery pack 100.

[0205] In one embodiment, the thermally conductive adhesive can enter the cavity space between the first base plate 312 and the second base plate 321 through the fifth through hole 3123 and fill at least a portion of the cavity space between the first base plate 312 and the second base plate 321.

[0206] In one embodiment, the first seal includes foam that contacts and connects to the first sidewall 322. In another embodiment, the first seal includes adhesive that cures and fills the gap between the first sidewall 322 and the first housing 10 before the inverted configuration, reducing the leakage of thermally conductive adhesive from the gap between the first sidewall 322 and the first housing 10.

[0207] Please refer to the following: Figure 11 and Figure 17In one embodiment, the battery pack 100 further includes a second seal (not shown) and a third seal (not shown). Before being inverted, the second seal fills the gap between the wiring harness 61 and the third hole 3213, the third seal partially fills the gap between the first output terminal 63 and the first hole 3211, and the third seal partially fills the gap between the second output terminal 64 and the second hole 3212. When the thermally conductive adhesive enters the cavity space between the first base plate 312 and the second base plate 321 through the fifth through hole 3123, the second and third seals can seal the space, reducing leakage of thermally conductive adhesive from the gaps between the wiring harness 61 and the third hole 3213, the first output terminal 63 and the first hole 3211, and the second output terminal 64 and the second hole 3212. This restricts the flow of thermally conductive adhesive, reduces adverse effects on the operation of the battery cell assembly 20, reduces waste of thermally conductive adhesive, and saves costs.

[0208] In one embodiment, the second seal is formed by filling the gap between the wire harness 61 and the third hole 3213 with structural adhesive and then curing it. In another embodiment, the second seal also serves to fix the wire harness 61 to the second base plate 321, thereby improving the shock resistance of the battery pack 100.

[0209] In one embodiment, the third seal is formed by filling the gap between the first output terminal 63 and the first hole 3211, and the gap between the second output terminal 64 and the second hole 3212 with structural adhesive and then curing it. In another embodiment, the third seal also serves to fix the first output terminal 63 and the second output terminal 64 to the second base plate 321, thereby improving the shock resistance of the battery pack 100.

[0210] In one embodiment, the battery pack 100 further includes a fourth seal (not shown) that fills the gap between the electrode terminal 212 and the fifth through hole 3123. During the application of thermally conductive adhesive, the fourth seal acts as a seal, preventing the adhesive from entering the cavity between the first base plate 312 and the second base plate 321 through the gap between the electrode terminal 212 and the fifth through hole 3123. This reduces the amount of adhesive required, thereby reducing the weight of the battery pack 100 and lowering costs.

[0211] In one embodiment, the fourth seal is formed by filling the gap between the electrode terminal 212 and the fifth through hole 3123 with structural adhesive and then curing it.

[0212] Please refer to the following: Figure 11 and Figure 12In one embodiment, there are multiple battery cell assemblies 20, which are arranged along the second direction Y. All battery cell assemblies 20 are connected to the first insulating member 31 and electrically connected to the second circuit board 41. In another embodiment, there are two battery cell assemblies 20. In other embodiments, there may be three, four, or more battery cell assemblies 20.

[0213] As an example, the following further explanation will be given with two battery cell assemblies 20 as an example.

[0214] In one embodiment, the battery pack 100 further includes a first structural member 81 disposed between two cell assemblies 20. The first structural member 81 connects the two cell assemblies 20. When viewed along the second direction Y, the projections of the multiple cell units 21 overlap with the projection of the first structural member 81. The first structural member 81 connects the multiple cell units 21, allowing some of the heat from the multiple cell units 21 to be transferred to the first structural member 81, which helps to reduce the temperature difference among the individual cell units 21 in the cell assembly 20. Optionally, the projections of all the cell units 21 overlap with the projection of the first structural member 81, which further improves the heat dissipation efficiency of the multiple cell units 21 and reduces the temperature difference among the individual cell units 21.

[0215] In one embodiment, the first structural member 81 is provided with a second channel 811, which can increase the surface area of ​​the first structural member 81, improve the heat dissipation efficiency of the first structural member 81, and improve the heat dissipation efficiency of the battery cell assembly 20. In one embodiment, the second channel 811 can also allow a cooling material to pass through, so as to remove some of the heat from the first structural member 81; optionally, the cooling material is air. In one embodiment, the second channel 811 penetrates the first structural member 81 along a first direction X.

[0216] In one embodiment, there are two second channels 811, which are arranged at Z-intervals along a third direction. In other embodiments, there may be one, three, four or more second channels 811.

[0217] Please refer to the following: Figure 1 and Figure 3In one embodiment, a third through hole 131 is provided on the third wall 13, and a fourth through hole 141 is provided on the fourth wall 14. Both the third through hole 131 and the fourth through hole 141 allow cooling material to pass through. The second channel 811 connects the third through hole 131 and the fourth through hole 141. The third through hole 131, the second channel 811, and the fourth through hole 141 can form a heat dissipation channel for cooling material to pass through, so that cooling material outside the first housing 10 passes through the second channel 811, carrying away at least part of the heat on the first structural member 81. This can improve the heat dissipation efficiency of the first structural member 81, improve the heat dissipation efficiency of the battery pack 100, reduce the temperature difference between the various cell units 21 in the battery pack 100, and reduce the impact of temperature rise on the charging and discharging performance of the battery pack 100.

[0218] In one embodiment, along the first direction X, the projection of the second channel 811 overlaps with the projection of the third through hole 131, and the projection of the second channel 811 overlaps with the projection of the fourth through hole 141. The overlapping projections of the third through hole 131, the second channel 811, and the fourth through hole 141 along the first direction X can reduce the resistance to the flow of cooling material in the second channel 811, increase the speed of the cooling material through the second channel 811, improve the heat dissipation efficiency of the first structural member 81, and improve the heat dissipation efficiency of the battery pack 100.

[0219] In one embodiment, the two ends of the first structural member 81 along the first direction X respectively contact and connect to the third wall 13 and the fourth wall 14, which can reduce the risk of debris outside the first housing 10 entering the first housing 10 through the gaps between the first structural member 81 and the third wall 13, and between the first structural member 81 and the fourth wall 14. Optionally, the two ends of the first structural member 81 along the first direction X are respectively bonded to the third wall 13 and the fourth wall 14 by adhesive. Optionally, the two ends of the first structural member 81 along the first direction X are respectively fastened to the third wall 13 and the fourth wall 14 by screws.

[0220] In one embodiment, the number of third through holes 131 is equal to the number of second channels 811 and their positions correspond. In another embodiment, the number of fourth through holes 141 is equal to the number of second channels 811 and their positions correspond.

[0221] In one embodiment, the outer surface of the first structural member 81 is made of a metal material with good thermal conductivity, which is beneficial for heat dissipation. In one embodiment, the first structural member 81 is made of a metal material with good thermal conductivity, such as aluminum. In one embodiment, the first structural member 81 is formed in one piece by casting.

[0222] In one embodiment, the battery pack 100 further includes a third thermally conductive element (not shown), located between the first structural member 81 and the adjacent cell assembly 20. The third thermally conductive element contacts and connects the first structural member 81 and the adjacent cell assembly 20, thereby improving the heat transfer efficiency between the first structural member 81 and the cell assembly 20. In one embodiment, the third thermally conductive element is a thermally conductive adhesive, which bonds the first structural member 81 and the adjacent cell assembly 20.

[0223] like Figure 18 and Figure 19 As shown, in one embodiment, the battery cell assembly 20 further includes a second structural member 22. The second structural member 22 is connected to the battery cell housing 211 of the battery cell unit 21 and the first structural member 81. Along the first direction X, the projection of the second structural member 22 overlaps with the projection of the battery cell housing 211, and along the second direction Y, the projection of the second structural member 22 overlaps with the projection of the first structural member 81. Some of the heat on the battery cell unit 21 can be transferred to the second structural member 22 through the battery cell housing 211, and some of the heat on the second structural member 22 can be transferred to the first structural member 81. The second structural member 22 helps to improve the heat dissipation efficiency of the battery cell unit 21.

[0224] In one embodiment, there are multiple second structural members 22, each of which is connected to the cell housing 211 and the first structural member 81, which can improve the heat dissipation efficiency of the cell assembly 20.

[0225] In one embodiment, the second structural member 22 includes a third base plate 221, a second side wall 222 and a third side wall 223, the second side wall 222 and the third side wall 223 being disposed on the third base plate 221 and located on the same side of the third base plate 221.

[0226] Taking the interconnected second structural member 22 and the battery cell unit 21 as an example, along the first direction X, the projection of the battery cell housing 211 lies within the projection of the third base plate 221; along the second direction Y, the projection of the battery cell housing 211 overlaps with the projection of the second side wall 222; and along the third direction Z, the projection of the battery cell housing 211 overlaps with the projection of the third side wall 223. The second structural member 22 partially covers the battery cell housing 211, which can improve the heat transfer efficiency between the second structural member 22 and the battery cell unit 21.

[0227] In one embodiment, there are two second sidewalls 222, located on opposite sides of the cell housing 211 along the second direction Y. In one embodiment, the second sidewalls 222 are opposite to and connected to the side sealing edges 21142 of the cell housing 211 along the second direction Y. In one embodiment, the third sidewall 223 is opposite to and connected to the bottom of the cell housing 211 along the third direction Z, wherein the bottom and top sealing edges 21141 of the cell housing 211 are located at opposite ends of the cell housing 211 along the third direction Z.

[0228] In one embodiment, the battery pack 100 further includes a fourth thermally conductive element (not shown), located between the second structural member 22 and the adjacent cell unit 21. The fourth thermally conductive element contacts and connects the second structural member 22 and the cell housing 211 of the adjacent cell unit 21, thereby improving the heat transfer efficiency between the second structural member 22 and the cell housing 211. In one embodiment, the fourth thermally conductive element is a thermally conductive adhesive, which bonds the second structural member 22 and the adjacent cell housing 211.

[0229] In one embodiment, a second structural member 22 and a battery cell unit 21 constitute a heat dissipation assembly, and multiple heat dissipation assemblies are stacked along a first direction X.

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

[0231] In one embodiment, the outer surface of the second structural member 22 comprises a metallic material, which facilitates heat dissipation. In one embodiment, the second structural member 22 is made of a material with good thermal conductivity, such as aluminum. In one embodiment, the second structural member 22 is formed in one piece by casting. In one embodiment, the second structural member 22 is formed by bending a profile.

[0232] In summary, the battery pack 100 of this application connects multiple electrode terminals 212 through the first insulating member 31, so that the heat on the multiple cell units 21 can be transferred to the first insulating member 31 through the electrode terminals 212. Furthermore, by providing a first channel 311 on the first insulating member 31 that connects the first through hole 111 and the second through hole 121, cooling materials outside the battery pack 100 can pass through the first channel 311, thereby carrying away at least part of the heat, improving the heat dissipation efficiency of the first insulating member 31, increasing the heat dissipation rate of the battery pack 100, and reducing the impact of temperature rise on the charging and discharging performance of the battery pack 100.

[0233] Example 2:

[0234] like Figure 1 , Figure 20 and Figure 21 As shown, Embodiment 2 of this application provides a charging system 200, including a charging box 210 and a battery pack 100 as described in any embodiment of Embodiment 1. The charging box 210 has a chamber, and at least a portion of the battery pack 100 is housed within the chamber. A first through hole 111, a second through hole 121, and a first channel 311 all communicate with the chamber. Cooling material can circulate between the first channel 311 and the chamber, improving the heat dissipation efficiency of the battery pack 100, reducing the impact of temperature rise on the charging performance of the battery pack 100, and shortening the charging time of the battery pack 100.

[0235] In one embodiment, the charging box 210 includes a first outer wall 2101, a second outer wall 2102, a third outer wall 2103, a fourth outer wall 2104, a fifth outer wall 2105, and a sixth outer wall 2106. The first outer wall 2101 and the second outer wall 2102 are disposed opposite each other along a first direction X, the third outer wall 2103 and the fourth outer wall 2104 are disposed opposite each other along a second direction Y, and the fifth outer wall 2105 and the sixth outer wall 2106 are disposed opposite each other along a third direction Z. The fifth outer wall 2105 connects the first outer wall 2101, the second outer wall 2102, the third outer wall 2103, and the fourth outer wall 2104. The first outer wall 2101, the second outer wall 2102, the third outer wall 2103, the fourth outer wall 2104, and the fifth outer wall 2105 form a chamber with an opening. The sixth outer wall 2106 is capable of closing the opening of the chamber. Optionally, the sixth outer wall 2106 is rotatably connected to the second outer wall 2102.

[0236] With the charging case 210 open, the projection of the chamber along the third direction Z is at least partially outside the projection of the sixth outer wall 2106. Optionally, the projection of the chamber is separate from the projection of the sixth outer wall 2106. When the charging case 210 is open, the battery pack 100 can move along the third direction Z closer to the chamber and can partially enter the chamber to connect to the charging case 210. The battery pack 100 can also move along the third direction Z away from the chamber, thereby separating from the charging case 210.

[0237] A first opening 21011 is provided on the first outer wall 2101, and a second opening 21021 is provided on the second outer wall 2102. Both the first opening 21011 and the second opening 21021 connect the chamber and the external space of the charging box 210, allowing cooling materials outside the charging box 210 to enter the chamber or cooling materials inside the chamber to leave the charging box 210. The first through hole 111, the second through hole 121, and the first channel 311 all connect the first opening 21011 and the second opening 21021 through the connecting chamber, thereby connecting the external space of the charging box 210. Cooling materials circulate between the space outside the charging box 210, the first opening 21011, the chamber, the first channel 311, and the second opening 21021, which can improve the heat dissipation efficiency of the battery pack 100, reduce the impact of temperature rise on the charging performance of the battery pack 100, and shorten the charging time of the battery pack 100.

[0238] In one embodiment, a third opening 21031 is provided on the third outer wall 2103, and a fourth opening (not shown) is provided on the fourth outer wall 2104. Both the third opening 21031 and the fourth opening connect the chamber and the external space of the charging box 210, allowing cooling materials outside the charging box 210 to enter the chamber or cooling materials inside the chamber to leave the charging box 210. The first channel 311 connects the third opening 21031 and the fourth opening through the connecting chamber, thereby connecting the external space of the charging box 210. Cooling materials circulate between the space outside the charging box 210, the third opening 21031, the fourth opening, the chamber, the first channel 311, the first opening 21011, and the second opening 21021, which can improve the heat dissipation efficiency of the battery pack 100, reduce the impact of temperature rise on the charging performance of the battery pack 100, and shorten the charging time of the battery pack 100. In one embodiment, along the second direction Y, the projection of the first channel 311 lies within the projection of the third opening 21031, and the projection of the first channel 311 lies within the projection of the fourth opening. This reduces the resistance to the flow of the cooling material within the first channel 311, increases the rate at which the cooling material passes through the first channel 311, and improves the heat dissipation efficiency of the battery pack 100. In one embodiment, the cooling material includes at least one of air and liquid. Optionally, the cooling material is air.

[0239] In one embodiment, the charging system 200 further includes a cooling device (not shown), which is located at the first opening 21011. The cooling device can blow gas from outside the charging box 210 into the chamber or extract gas from the chamber, thereby increasing the gas exchange rate between the inside and outside of the chamber and further improving the heat dissipation efficiency of the battery pack 100. Optionally, the cooling device includes a fan.

[0240] Please refer to the following: Figure 20 , Figure 21 and Figure 22In one embodiment, a gas channel 220 is provided between the battery pack 100 and the inner wall of the chamber, and the gas channel 220 connects the first opening 21011, the second opening 21021, the third opening 21031 and the fourth opening. When gas flows in the chamber, it can flow along the gas channel 220, thereby carrying away some of the heat on the first housing 10 and improving the heat dissipation efficiency of the battery pack 100.

[0241] In one embodiment, the gas channel 220 includes a second region 2201, a third region 2202, a fourth region 2203, and a fifth region 2204. The second region 2201 is located between the battery pack 100 and the first outer wall 2101, the third region 2202 is located between the battery pack 100 and the second outer wall 2102, the fourth region 2203 is located between the battery pack 100 and the third outer wall 2103, and the fifth region 2204 is located between the battery pack 100 and the fourth outer wall 2104. The second region 2201, the third region 2202, the fourth region 2203, and the fifth region 2204 are interconnected.

[0242] In one embodiment, the charging box 210 further includes a support portion 230 connected to the first housing 10 of the battery pack 100. The support portion 230 can be used to limit the displacement of the battery pack 100 relative to the charging box 210, so that when the battery pack 100 is connected to the charging box 210, a portion of the battery pack 100 is located inside the cavity.

[0243] In one embodiment, the gas channel 220 further includes a sixth region (not shown), which is located between the battery pack 100 and the fifth outer wall 2105 and connects the second region 2201, the third region 2202, the fourth region 2203 and the fifth region 2204.

[0244] In one embodiment, the charging system 200 further includes a charging base 240, which is disposed on the support portion 230. When the battery pack 100 abuts against the support portion 230, the battery pack 100 docks with the charging base 240 and is electrically connected. The battery pack 100 can be charged by electrically connecting the battery pack 100 through the charging base 240.

[0245] In one embodiment, the coolant includes a coolant (not shown), which is contained within a cavity. When the battery pack 100 is connected to the charging case 210 and partially contained within the cavity, the battery pack 100 within the cavity contacts the coolant. Optionally, a portion of the coolant is contained within a first channel 311 and can flow between a first through-hole 111, the first channel 311, and a second through-hole 121. The coolant has good thermal conductivity, enabling rapid heat exchange with the battery pack 100, improving the heat dissipation efficiency of the battery pack 100, reducing the impact of temperature rise on the charging performance of the battery pack 100, and shortening the charging time.

[0246] In summary, the charging system 200 of this application connects to the battery pack 100 through the cooling material inside the charging box 210, which can improve the heat dissipation efficiency of the battery pack 100, reduce the impact of temperature rise on the charging performance of the battery pack 100, and shorten the charging time of the battery pack 100.

[0247] Example 3:

[0248] like Figure 23 As shown, Embodiment 3 of this application provides an electrical device 300, including the battery pack 100 described in any of the embodiments in Embodiment 1, wherein the battery pack 100 can provide electrical energy to the electrical device 300.

[0249] In one embodiment, the electrical device 300 includes, but is not limited to, any one of a drone, an electric two-wheeler, an electric vehicle, a household appliance, and a robot.

[0250] The electrical device 300 of this application is powered by a battery pack 100. The battery pack 100 is connected to multiple electrode terminals 212 through a first insulating member 31, so that the heat on the multiple battery cells 21 can be transferred to the first insulating member 31 through the electrode terminals 212. A first channel 311 is provided on the first insulating member 31 to connect the first through hole 111 and the second through hole 121, so that the cooling material outside the battery pack 100 can pass through the first channel 311 to remove at least part of the heat, thereby improving the heat dissipation rate of the battery pack 100, reducing the impact of continuous discharge temperature rise on the discharge performance of the battery pack 100, and improving the economic efficiency of the electrical device 300.

[0251] In addition, those skilled in the art may make other changes within the spirit of this application. Of course, all such changes made in accordance with the spirit of this application should be included within the scope disclosed in this application.

Claims

1. A battery pack, characterized in that, include: The first housing has a first through hole and a second through hole, which allow cooling material to pass through. A battery cell assembly is disposed within the first housing. The battery cell assembly includes a plurality of battery cell units stacked along a first direction. Each battery cell unit includes a battery cell housing and electrode terminals. The electrode terminals are disposed in the battery cell housing and extend out of the battery cell housing. A first insulating element is disposed inside the first housing. The first insulating element is connected to a plurality of electrode terminals. The first insulating element has a through first channel, which connects the first through hole and the second through hole. The first insulating component includes a first base plate, the first base plate is provided with a through fifth through hole, and there are multiple first channels and multiple fifth through holes. Along the first direction, the multiple fifth through holes are arranged at intervals, and the multiple first channels are arranged at intervals. A first channel is provided between two adjacent fifth through holes. The first insulating member further includes a plurality of first protrusions spaced apart along the first direction, the plurality of first protrusions being disposed between the first base plate and the cell housing and extending along a third direction perpendicular to the first direction; a fifth through hole is provided between two adjacent first protrusions, and at least one of the plurality of electrode terminals is disposed on the side of the first base plate away from the cell housing after passing through the fifth through hole; The first channel extends through the first protrusion along a second direction perpendicular to the first direction.

2. The battery pack as described in claim 1, characterized in that, The battery pack further includes a first thermal conductive element that fills at least a portion of the gap between the first insulating element and the electrode terminals.

3. The battery pack as described in claim 1, characterized in that, The first housing includes a first wall and a second wall, which are disposed opposite each other along a second direction perpendicular to the first direction. The first through hole passes through the first wall, and the second through hole passes through the second wall.

4. The battery pack as described in claim 1, characterized in that, Along the third direction, the cross-sectional area of ​​each of the first protrusions gradually increases.

5. The battery pack as described in claim 1, characterized in that, The battery pack also includes a conductive element disposed on the first base plate and exposed on the side of the first base plate opposite to the cell housing, and at least one of the plurality of electrode terminals passes through the fifth through hole and is connected to the conductive element.

6. The battery pack as described in claim 5, characterized in that, The battery pack also includes a first circuit board, the conductive element is disposed on the first circuit board, and the first circuit board and the first insulating element are integrally formed by injection molding.

7. The battery pack as described in claim 5, characterized in that, The battery pack also includes a first output terminal and a second output terminal, which are disposed on the first base plate and connected to the conductive element.

8. The battery pack as described in claim 7, characterized in that, The first output terminal and the second output terminal are integrally formed with the first insulating component by injection molding.

9. The battery pack as described in claim 7, characterized in that, The battery pack further includes a second insulating member disposed on the side of the first insulating member opposite to the cell housing. The second insulating member includes a first hole and a second hole, with the first output terminal passing through the first hole and the second output terminal passing through the second hole.

10. The battery pack as claimed in claim 1, characterized in that, Multiple battery cell units are stacked along a first direction; The first housing includes a third wall and a fourth wall opposite to each other along the first direction. The third wall is provided with a third through hole, and the fourth wall is provided with a fourth through hole. The third through hole and the fourth through hole allow cooling material to pass through. The number of battery cell assemblies is multiple, and the multiple battery cell assemblies are arranged along a second direction perpendicular to the first direction; The battery pack further includes a first structural component, which is disposed between two adjacent battery cell assemblies and connects the two adjacent battery cell assemblies. The first structural component includes a second channel through which cooling material can pass, and the second channel connects the third through hole and the fourth through hole.

11. A charging system, characterized in that, include: Charging box, including a chamber; The battery pack according to any one of claims 1 to 10, wherein at least a portion of the battery pack is housed in the chamber; The charging box has a first opening and a second opening, and the first through hole, the first channel and the second through hole connect the first opening and the second opening.

12. An electrical appliance, characterized in that, Includes the battery pack as described in any one of claims 1 to 10.

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