Battery end part assembly, battery, battery pack and electric equipment

Abstract

The invention provides a battery end part assembly, a battery, a battery pack and electric equipment, the battery end part assembly is used for the battery, the battery comprises a plurality of battery cells, the plurality of battery cells comprise a plurality of explosion-proof valves, the battery end part assembly comprises an electric connection assembly, the electric connection assembly is electrically connected with the plurality of battery cells, the electric connection assembly is provided with a plurality of pressure relief holes, and the pressure relief holes are communicated with the explosion-proof valves. Each pressure relief hole at least corresponds to one anti-explosion valve; and the flow channel assembly comprises a fire fighting part, the fire fighting part is provided with a fire fighting channel, the fire fighting channel communicates with the multiple anti-explosion valves through the multiple pressure relief holes, and the fire fighting channel is suitable for relieving pressure or discharging electrolyte or inputting a fire extinguishing medium.

Description

Battery end components, batteries, battery packs and electrical devices Technical Field

[0001] This invention relates to the field of battery technology, specifically to battery end components, batteries, battery packs, and electrical devices. Background Technology

[0002] In related technologies, when a battery experiences thermal runaway, it generates high-temperature, high-pressure gases and flames. The continuous accumulation of high-pressure gases can easily cause the battery pack to explode or catch fire, endangering personal and property safety. Furthermore, the high-temperature, high-pressure environment accelerates the chemical reactions inside the battery, damaging its structure, such as causing electrode material damage, resulting in short circuits, and subsequently causing the battery pack to spontaneously combust. If the gas-liquid-solid mixture ejected during battery thermal runaway cannot be discharged in time, the conductive substances in it may cause short circuits, electric arcs, and other problems, leading to secondary hazards. This makes battery thermal runaway difficult to control, and many common battery pack spontaneous combustion and explosion incidents are related to battery thermal runaway and poor pressure relief. Summary of the Invention

[0003] Embodiments of the present invention provide a battery end component, a battery, a battery pack, and an electrical device, which can improve the technical problem of thermal runaway propagation in battery packs.

[0004] In a first aspect, embodiments of the present invention provide a battery end assembly for a battery, the battery including a plurality of battery cells, the plurality of battery cells including a plurality of explosion-proof valves, comprising: an electrical connection assembly configured to electrically connect the plurality of battery cells, the electrical connection assembly having a plurality of pressure relief holes, each pressure relief hole corresponding to at least one of the explosion-proof valves; and a flow channel assembly including a fire-fighting component, the fire-fighting component having a fire-fighting channel, the fire-fighting channel being connected to the plurality of explosion-proof valves through the plurality of pressure relief holes.

[0005] In one embodiment, the flow channel assembly further includes a cooling element connected to the fire-fighting component, the cooling element being connected to the electrical connection assembly to cool the electrical connection assembly.

[0006] In one embodiment, the flow channel assembly is connected to the side of the electrical connection assembly opposite to the plurality of battery cells.

[0007] In one embodiment, the fire-fighting component is configured to cover a plurality of the pressure relief holes.

[0008] In one embodiment, the flow channel assembly further includes an insulating member, a portion of which is disposed between the cooling member and the electrical connection assembly, and another portion of which is disposed between the fire-fighting member and the electrical connection assembly.

[0009] In one embodiment, the electrical connection assembly includes a connection bar assembly, which includes a first set of connection bars and a second set of connection bars, the first set of connection bars and the second set of connection bars being disposed on both sides of the plurality of pressure relief holes; the flow channel assembly includes a first cooling element and a second cooling element, the fire-fighting element being disposed between the first cooling element and the second cooling element, the first cooling element being disposed corresponding to the first set of connection bars to cool the first set of connection bars, and the second cooling element being disposed corresponding to the second set of connection bars to cool the second set of connection bars.

[0010] In one embodiment, the fire-fighting component is provided with a plurality of pressure relief grooves, each pressure relief groove being configured to correspond to at least one pressure relief hole, and the pressure relief groove being configured to connect the fire-fighting passage and the pressure relief hole.

[0011] In one embodiment, the fire-fighting component includes an inlet pipe and an outlet pipe communicating with the fire escape; both the inlet pipe and the outlet pipe are adapted to depressurize; and / or, the inlet pipe is also adapted to introduce the extinguishing medium; and / or, both the inlet pipe and the outlet pipe include a fiberglass flexible tube.

[0012] In one embodiment, the fire-fighting component includes a first surface and a second surface opposite each other along the thickness direction, the second surface being connected to the electrical connection assembly, a plurality of pressure relief grooves being disposed on the second surface, and the inlet pipe and the outlet pipe being disposed on the first surface.

[0013] In one embodiment, the fire-fighting component is provided with a fire-fighting passage, which is configured as a continuous passage extending along the length or width direction of the battery. The inlet pipe is located near one end of the fire-fighting component, and the outlet pipe is located near the other end of the fire-fighting component.

[0014] In one embodiment, the cooling component includes a first cooling component and a second cooling component. Both the first cooling component and the second cooling component are provided with a plurality of cooling channels. The interior of both the first cooling component and the second cooling component includes at least one partition. The plurality of cooling channels include a first cooling channel and a second cooling channel disposed on both sides of the partition. One end of the first cooling channel is connected to one end of the second cooling channel, and the other end of the first cooling channel and the other end of the second cooling channel are separated by the partition.

[0015] In one embodiment, the flow channel assembly includes a first sealing member and a second sealing member; the first sealing member is configured to connect a first end of the cooling member and a first end of the fire-fighting member, and the first sealing member is also adapted to close the opening at the first end of the cooling member and the opening at the first end of the fire-fighting member; and / or, the second sealing member is configured to connect a second end of the cooling member and a second end of the fire-fighting member, and the second sealing member is also adapted to close the opening at the second end of the fire-fighting member.

[0016] In one embodiment, one of the first sealing member and the second sealing member is further adapted to connect the cooling channel of the first cooling member and the cooling channel of the second cooling member.

[0017] In one embodiment, the electrical connection assembly includes a first heat-resistant element and a connecting bar assembly, the first heat-resistant element being disposed between the connecting bar assembly and the flow channel assembly, and the side of the first heat-resistant element facing away from the connecting bar assembly being connected to the flow channel assembly.

[0018] In one embodiment, the first heat-resistant component is provided with a plurality of first pressure relief holes, which are connected to the fire escape passage and the plurality of explosion-proof valves.

[0019] In one embodiment, the electrical connection assembly further includes a thermally conductive medium disposed between the first heat-resistant element and the connection assembly and adapted to bond the first heat-resistant element.

[0020] In one embodiment, the electrical connection assembly further includes a bracket having a plurality of mounting slots; the connection bar assembly includes a plurality of connection bars, each of the connection bars being installed in one of the mounting slots; and / or, the depth of the mounting slot is greater than or equal to the thickness of the connection bar; and / or, the mounting slot is further provided with a heat-conducting medium.

[0021] In one embodiment, the bracket is further provided with a plurality of clearance slots, each of the connecting rows includes an arched portion, the clearance slot is configured to receive the arched portion of the connecting row, and the depth of the clearance slot is greater than the depth of the mounting slot.

[0022] In one embodiment, the bracket further includes a barrier portion disposed between two adjacent mounting slots, and the barrier portion is configured to insulate the two adjacent connecting rows.

[0023] In one embodiment, the bracket includes a plurality of fixing posts, each fixing post corresponding to a mounting slot, and the fixing posts are configured as fixed connection rows.

[0024] In one embodiment, the bracket is further provided with a plurality of first pressure relief protrusions, each of the first pressure relief protrusions being provided with a second pressure relief hole to connect the fire passage and the explosion-proof valve.

[0025] In one embodiment, the electrical connection assembly further includes a second heat-resistant element, which is disposed on the side of the connection assembly opposite to the first heat-resistant element. The second heat-resistant element has a plurality of clearance holes, which are configured to avoid the terminals of the battery cell.

[0026] In one embodiment, the second heat-resistant component includes a plurality of second pressure relief bosses; each second pressure relief boss is provided with a third pressure relief hole to connect the fire escape and the explosion-proof valve; and / or, the bracket is further provided with a plurality of first pressure relief bosses, each first pressure relief boss is provided with a second pressure relief hole, and each second pressure relief boss is configured to pass through a second pressure relief hole; and / or, the first heat-resistant component is provided with a plurality of first pressure relief holes, and the second pressure relief boss is configured to pass through the first pressure relief hole.

[0027] In one embodiment, the sidewall of the second pressure relief boss has at least one opening to facilitate folding of the second pressure relief boss.

[0028] Secondly, embodiments of the present invention provide a battery comprising a battery end assembly as described above and a plurality of battery cells, the battery end assembly being disposed on top of the plurality of battery cells.

[0029] Thirdly, embodiments of the present invention provide a battery pack comprising the battery as described above, or the battery pack comprising the battery end assembly as described above.

[0030] Fourthly, embodiments of the present invention provide an electrical device that includes a battery pack as described above, or a battery as described above, or a battery end assembly as described above.

[0031] The beneficial effects of the embodiments of the present invention are as follows: In the embodiments of the present invention, by integrating the electrical connection assembly and the flow channel assembly to form a battery end assembly, the problems of thermal runaway and thermal propagation of the battery can be improved. In a first aspect, by providing multiple pressure relief holes on the electrical connection assembly, with each pressure relief hole corresponding to a multiple explosion-proof valve of a multiple battery cell, and by providing a fire-fighting channel within the fire-fighting component of the flow channel assembly, this fire-fighting channel connects to the pressure relief channels of the multiple explosion-proof valves of the multiple battery cells via the multiple pressure relief holes of the electrical connection assembly. This fire-fighting channel can serve as a transmission channel for the extinguishing medium. The extinguishing medium is sequentially transported through the fire-fighting channel of the flow channel assembly and the multiple pressure relief holes of the electrical connection assembly to the explosion-proof valve of the runaway battery cell, so that after the explosion-proof valve of the battery cell is opened, the extinguishing medium can enter the battery cell. The first aspect involves physically cooling and chemically inhibiting the thermal runaway of the battery cells, thereby suppressing the uncontrollable temperature rise inside the battery pack caused by the opening of the explosion-proof valve. It is understood that by using extinguishing media to physically cool and chemically inhibit the internal structure of the cells with open explosion-proof valves, the continuous heating of adjacent cells and the resulting thermal runaway can be prevented, effectively reducing the possibility of thermal runaway propagation and significantly lowering the likelihood of battery pack explosion or fire. Furthermore, when this battery pack is used in new energy vehicles, it can effectively improve personal and property safety. Secondly, this fire escape channel also serves as a pressure relief mechanism. It connects multiple explosion-proof valves of multiple battery cells through multiple pressure relief holes, allowing high-temperature ejected material to enter the pressure relief holes of the electrical connection components and then into the fire escape channel of the fire-fighting device in the event of thermal runaway. This achieves directional venting and pressure relief, preventing the thermal runaway from spreading to adjacent battery cells or electrical units, reducing the safety hazards of the battery pack and the risk of a chain reaction of thermal runaway, while also reducing the risk of short circuits. Thirdly, the fire escape channel is also used to discharge electrolyte. The fire escape channel is connected to multiple explosion-proof valves of multiple battery cells through multiple pressure relief holes, so that when the explosion-proof valve of the battery cell is depressurized, the splashed high-temperature electrolyte can enter the fire escape channel of the flow channel component through the pressure relief hole of the electrical connection component, thereby avoiding the high-temperature electrolyte from splashing onto the connection bar component of the electrical connection component or the acquisition harness, thus avoiding large-scale electrical short circuits and electrical safety accidents. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 is a schematic diagram of the operation of the flow channel assembly and the battery cell corresponding to the battery end assembly provided in an embodiment of the present invention; Figure 2 is an exploded view of the battery end assembly provided in an embodiment of the present invention; Figure 3 is an installation schematic diagram of a portion of the structure of the battery end assembly provided in an embodiment of the present invention; Figure 4 is a schematic diagram of the operation of the battery end assembly provided in an embodiment of the present invention; Figure 5 is an axonometric view of the flow channel assembly of the battery end assembly provided in an embodiment of the present invention; Figure 6 is an exploded view of the flow channel assembly of the battery end assembly provided in an embodiment of the present invention; Figure 7 is a bottom view of the flow channel assembly of the battery end assembly provided in an embodiment of the present invention; Figure 8 is a side sectional view of the flow channel assembly of the battery end assembly provided in an embodiment of the present invention; Figure 9 is a cross-sectional schematic diagram of the cooling channel and fire-fighting channel of the flow channel assembly of the battery end assembly provided in an embodiment of the present invention; Figure 10 is... Figure 11 is a perspective view of the fire-fighting component of the flow channel assembly of the battery end assembly provided in an embodiment of the present invention; Figure 12 is a perspective view of the second sealing component of the flow channel assembly of the battery end assembly provided in an embodiment of the present invention; Figure 13 is an exploded view of the electrical connection assembly of the battery end assembly provided in an embodiment of the present invention; Figure 14 is a perspective view of the bracket of the electrical connection assembly of the battery end assembly provided in an embodiment of the present invention; Figure 15 is a perspective view of the second heat-resistant component of the electrical connection assembly of the battery end assembly provided in an embodiment of the present invention; Figure 16 is a partial enlarged view of Figure 15; Figure 17 is a perspective view of the first heat-resistant component of the electrical connection assembly of the battery end assembly provided in an embodiment of the present invention; Figure 18 is a perspective view of the connection bar of the battery end assembly provided in an embodiment of the present invention.

[0034] Reference numerals: 100, Battery end assembly; 10, Electrical connection assembly; 1, First heat-resistant component; 11, First pressure relief hole; 2, Thermal conductive medium; 3, Connecting bus assembly; 31, First set of connecting buses; 32, Second set of connecting buses; 33, Connecting bus; 34, Arched portion; 331, First connecting portion; 332, Second connecting portion; 4, Bracket; 41, Mounting groove; 42, Clearance groove; 43, Barrier portion; 44, Fixing post; 45, Welding groove; 46, First pressure relief boss; 461, Second pressure relief hole; 47, Partition boss; 5, Second heat-resistant component; 51, Clearance hole; 52, Second pressure relief boss; 521, Third... 53. Pressure relief hole; 21. Acquisition harness; 20. Flow channel assembly; 6. Cooling component; 61. First cooling component; 62. Second cooling component; 63. Separator; 64. Cooling channel; 641. First cooling channel; 642. Second cooling channel; 65. T-pipe; 7. Fire-fighting component; 71. Pressure relief groove; 72. First surface; 73. Second surface; 74. Fire-fighting channel; 75. Inlet pipe; 76. Outlet pipe; 8. Insulating component; 91. First sealing component; 911. First sealing part; 92. Second sealing component; 921. Second sealing part; 200. Battery cell; 210. Terminal post; 220. Explosion-proof valve. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Furthermore, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present invention and are not intended to limit the present invention. In the present invention, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0036] In related technologies, when a battery experiences thermal runaway, it generates high-temperature, high-pressure gases and flames. The continuous accumulation of high-pressure gases can easily cause the battery pack to explode or catch fire, endangering personal and property safety. Furthermore, the high-temperature, high-pressure environment accelerates the chemical reactions inside the battery, damaging its structure, such as causing electrode material damage, resulting in short circuits, and subsequently causing the battery pack to spontaneously combust. If the gas-liquid-solid mixture ejected during battery thermal runaway cannot be discharged in time, the conductive substances in it may cause short circuits, electric arcs, and other problems, leading to secondary hazards. This makes battery thermal runaway difficult to control, and many common battery pack spontaneous combustion and explosion incidents are related to battery thermal runaway and poor pressure relief.

[0037] Embodiments of this application provide a battery pack, which includes a housing and a plurality of batteries disposed inside the housing. The plurality of batteries are arranged in a matrix inside the housing, and the plurality of batteries can be arranged in a single layer or in multiple layers. The battery pack can be an energy storage battery pack or a power battery pack.

[0038] Embodiments of this application also provide a battery comprising multiple cells arranged in a matrix, wherein the cells can be cylindrical or prismatic. Each cell has an explosion-proof valve at its top to facilitate pressure relief. The battery has a top and a bottom end opposite each other along its height direction. A battery end assembly 100 is provided at the top end of the battery, and a liquid cooling assembly is provided at the bottom end of the battery. This liquid cooling assembly can be integrated into the bottom plate of the casing.

[0039] Embodiments of this application also provide a battery end assembly 100, as shown in Figures 1 to 4. The battery end assembly 100 can be disposed on the top of the battery or on the side of the battery. The battery end assembly 100 includes an electrical connection assembly 10 and a flow channel assembly 20 connected together. The electrical connection assembly 10 is configured to electrically connect multiple battery cells 200, such that the multiple battery cells 200 are connected in series, parallel, or mixed. The electrical connection assembly 10 also includes multiple pressure relief holes, each pressure relief hole corresponding to at least one explosion-proof valve 220 of a battery cell 200. The flow channel assembly 20 includes a fire-fighting component 7, which has a fire-fighting passage 74. The fire-fighting passage 74 is connected to the explosion-proof valves 220 of the multiple battery cells 200 through the multiple pressure relief holes. The fire-fighting passage 74 is suitable for pressure relief, discharge of electrolyte, or introduction of extinguishing media.

[0040] Connecting the electrical connection assembly 10 to the flow channel assembly 20 can effectively improve problems related to battery thermal runaway and poor pressure relief. Firstly, by providing multiple pressure relief holes on the electrical connection assembly 10, each corresponding to a different explosion-proof valve 220 of a battery cell 200, and by providing a fire-fighting passage 74 within the fire-fighting component 7 of the flow channel assembly 20, this fire-fighting passage 74 connects to the multiple explosion-proof valves 220 of the battery cells 200 via the multiple pressure relief holes of the electrical connection assembly 10. This fire-fighting passage 74 can serve as a transmission channel for the extinguishing medium. The extinguishing medium is sequentially transported through the fire-fighting passage 74 of the flow channel assembly 20 and the multiple pressure relief holes of the electrical connection assembly 10 to the explosion-proof valve 220 of the runaway battery cell 200, so that after the explosion-proof valve 220 of the battery cell 200 is opened, the extinguishing medium can... The extinguishing medium enters the interior of the battery cell 200 to physically cool and chemically suppress the battery cell 200, thereby suppressing the uncontrollable temperature rise inside the battery pack caused by the opening of the explosion-proof valve 220 when the battery cell 200 is in a thermal runaway state. It is understood that because the extinguishing medium enters the interior of the battery cell 200 with the explosion-proof valve 220 open to physically cool and chemically suppress the battery cell 200, it can prevent the adjacent battery cell 200 from being continuously heated and causing thermal runaway of the adjacent battery cell 200, thereby effectively reducing the possibility of thermal runaway spreading, and thus significantly reducing the possibility of battery pack explosion or fire. Furthermore, when the battery pack is used in new energy vehicles, it can also effectively improve personal and property safety. Secondly, the fire escape 74 is also used for pressure relief. The fire escape 74 is connected to multiple explosion-proof valves 220 of multiple battery cells 200 through multiple pressure relief holes, so that when a battery cell 200 experiences thermal runaway, the high-temperature ejected material can enter the pressure relief hole of the electrical connection assembly 10 through the explosion-proof valve 220 of the battery cell 200 and enter the fire escape 74 of the fire-fighting component 7 to achieve directional air release and pressure relief, avoid the spread of thermal runaway to adjacent battery cells 200 or electrical units, reduce the safety hazards of the battery pack and the risk of chain thermal runaway, and also reduce the risk of short circuit. Thirdly, the fire escape 74 is also used to discharge electrolyte. The fire escape 74 is connected to multiple explosion-proof valves 220 of multiple battery cells 200 through multiple pressure relief holes, so that when the explosion-proof valves 220 of the battery cells 200 are depressurized, the splashed high-temperature electrolyte can enter the fire escape 74 of the fire-fighting component 7 of the flow channel assembly 20 through the pressure relief holes of the electrical connection assembly 10, thereby preventing the high-temperature electrolyte from splashing onto the connection bar assembly 3 of the electrical connection assembly 10 or the acquisition harness, thus avoiding large-scale electrical short circuits and electrical safety accidents.

[0041] In some embodiments, as shown in Figures 2, 5, and 6, the flow channel assembly 20 further includes at least one cooling element 6 connected to the fire-fighting element 7. The cooling element 6 is connected to a portion of the surface of the electrical connection assembly 10 to cool the electrical connection assembly. By connecting the cooling element 6 to the fire-fighting element 7 for integration, and further connecting it to the electrical connection assembly 10 for integration, the battery end assembly 100 gains multiple functions. Connecting the cooling element 6 to the electrical connection assembly 10 cools the electrical connection assembly 10 and facilitates heat exchange with the top of the battery. When a liquid cooling assembly is simultaneously installed at the bottom of the battery, synchronous liquid cooling of the top and bottom of the battery can be achieved, effectively improving the technical problem of large temperature differences among multiple cells 200 in the height direction of the battery, improving the consistency of temperature distribution among multiple cells 200, and thus improving the overall cycle life of the battery. Furthermore, when liquid cooling assemblies are simultaneously installed at the top and bottom of the battery, the heat exchange between the battery and the flow channel assembly can be significantly increased, allowing the battery pack to develop towards larger capacity, larger cells 200, and higher charge / discharge rates.

[0042] In some embodiments, the connection between the cooling component 6 and the fire-fighting component 7 includes welding.

[0043] In some embodiments, as shown in FIG2, the flow channel assembly 20 is connected to the side of the electrical connection assembly 10 opposite to the plurality of battery cells 200, so that the fire channel 74 of the fire-fighting component 7 and the cooling component 6 are located directly above the electrical connection assembly 10, thereby achieving directional pressure relief, fire extinguishing, and cooling. The flow channel assembly 20 can be bonded to the electrical connection assembly 10 using high-temperature adhesive. Along the height direction of the battery, the electrical connection assembly 10 and the flow channel assembly 20 are sequentially stacked on top of the plurality of battery cells 200.

[0044] In some embodiments, the fire-fighting component 7 is configured to cover multiple pressure relief holes of the electrical connection assembly 10, so that the high-temperature and high-pressure gas and electrolyte flowing out through the multiple pressure relief holes can be directionally delivered into the fire passage of the fire-fighting component 7. At the same time, the extinguishing medium flowing out of the fire passage 74 of the fire-fighting component 7 can be directionally delivered through the multiple pressure relief holes into the multiple explosion-proof valves 220 of the multiple battery cells 200.

[0045] In some embodiments, as shown in Figures 5 and 6, the flow channel assembly 20 further includes an insulating member 8. A portion of the insulating member 8 is disposed between the cooling member 6 and the electrical connection assembly 10, and another portion of the insulating member 8 is disposed between the fire-fighting member 7 and the electrical connection assembly 10. It is understood that since the cooling member 6 and the fire-fighting member 7 are mostly made of aluminum, an insulating member 8 is provided between the cooling member 6 and the electrical connection assembly 10, and between the fire-fighting member 7 and the electrical connection assembly 10, to prevent short circuits between the flow channel assembly 20 and the multiple battery cells 200. The insulating member 8 is made of plastic material, with PC being a suitable plastic material. The insulating member 8 can be sheet-shaped, and the flow channel assembly 20 is connected to the electrical connection assembly 10 through the insulating member 8.

[0046] In some embodiments, as shown in Figures 5 and 6, the flow channel assembly 20 includes two cooling elements 6 and a fire-fighting element 7. The two cooling elements 6 are a first cooling element 61 and a second cooling element 62, respectively. The fire-fighting element 7 is disposed between the first cooling element 61 and the second cooling element 62, and the first cooling element 61, the fire-fighting element 7, and the second cooling element 62 are arranged sequentially along the width direction of the battery pack. The electrical connection assembly 10 includes a connection bar assembly 3, which includes a first set of connection bars 31 and a second set of connection bars 32. Each battery cell 200 has a positive terminal, a negative terminal, and an explosion-proof valve 220 located between the positive terminal and the negative terminal on its top surface. The first set of connection bars 31 and the second set of connection bars 32 each include multiple connection bars 33. The connection bars 33 of the first set of connection bars 31 are configured to connect the positive terminal and the negative terminal of two adjacent battery cells 200, and the connection bars 33 of the second set of connection bars 32 are configured to connect the negative terminal and the positive terminal of two adjacent battery cells 200. Correspondingly, the first set of connecting bars 31 and the second set of connecting bars 32 are respectively arranged on both sides of the multiple pressure relief holes. The first cooling component 61 is arranged corresponding to the first set of connecting bars 31 to cool the first set of connecting bars 31, and the second cooling component 62 is arranged corresponding to the second set of connecting bars 32 to cool the second set of connecting bars 32. The fire-fighting component 7 is arranged corresponding to the multiple pressure relief holes so that the fire passage 74 is located directly above the multiple pressure relief holes.

[0047] In some embodiments, as shown in Figures 1, 2, 4, 6, and 7, the fire-fighting component 7 has a first surface 72 and a second surface 73 opposite to each other along its thickness direction. The second surface 73 is connected to the electrical connection assembly 10. A plurality of pressure relief grooves 71 are provided on the second surface 73, each pressure relief groove 71 corresponding to at least one pressure relief hole, such that the pressure relief groove 71 connects the fire escape 74 and the pressure relief hole. In a specific embodiment, a pressure relief hole corresponds to the explosion-proof valve 220 of a battery cell 200, and a pressure relief groove 71 corresponds to a pressure relief hole. The shape of the pressure relief groove 71 and its projected area on the electrical connection assembly 10 are substantially the same as the shape and surface area of ​​the pressure relief hole, to achieve directional pressure relief, input of extinguishing medium, and discharge of electrolyte.

[0048] In some embodiments, as shown in Figures 6 and 8, the fire-fighting component 7 further includes an inlet pipe 75 and an outlet pipe 76 connected to the fire passage 74. The inlet pipe 75 and the outlet pipe 76 are connected to the outside of the battery pack. Both the inlet pipe 75 and the outlet pipe 76 are adapted to depressurize, so that the high-temperature and high-pressure combustible gas discharged from the explosion-proof valve 220 of the battery cell 200 in a thermal runaway state is discharged through the pressure relief hole, the pressure relief groove 71, and the fire passage 74 in sequence, and then through the inlet pipe 75 and / or the outlet pipe 76, so as to achieve directional pressure relief.

[0049] In some embodiments, the inlet pipe 75 of the fire-fighting component 7 is also adapted to introduce fire extinguishing medium. After the fire extinguishing medium is introduced through the inlet pipe 75, it enters the interior of the battery cell 200, which is in a thermal runaway state, through the fire passage 74, the pressure relief groove 71, the pressure relief hole, and the explosion-proof valve 220 of the battery cell 200 in sequence. This is to physically cool down and chemically suppress the battery cell 200, suppress the uncontrollable temperature rise caused by the thermal runaway of the battery cell 200 after the explosion-proof valve 220 is opened, and prevent adjacent battery cells 200 from being continuously heated, thus preventing the spread of thermal runaway.

[0050] In some embodiments, both the inlet pipe 75 and the outlet pipe 76 include fiberglass flexible tubing. The fiberglass tubing has excellent high-temperature resistance, thereby preventing high-temperature gases or fire extinguishing media from damaging the inlet pipe 75 and the outlet pipe 76.

[0051] In some embodiments, the fire-fighting component 7 includes a first surface 72 and a second surface 73 opposite to each other along its thickness direction. The second surface 73 is connected to the electrical connection assembly 10. A plurality of pressure relief grooves 71 are disposed on the second surface 73. An inlet pipe 75 and an outlet pipe 76 are disposed on the first surface 72 so that a stable bonding structure is formed between the second surface 73 of the fire-fighting component 7 and the electrical connection assembly 10.

[0052] In some embodiments, the inlet pipe 75 is disposed near one end of the first surface 72, the outlet pipe 76 is disposed near the other end of the first surface 72, and the fire passage 74 is configured as a single continuous cavity passage. The fire passage 74 may be configured to extend along the length direction of the battery or along the width direction of the battery, thereby facilitating the rapid discharge of high temperature and high pressure gas and the rapid input of fire extinguishing medium.

[0053] In some embodiments, as shown in Figures 6 to 10, the flow channel assembly 20 includes two cooling elements 6, namely a first cooling element 61 and a second cooling element 62. Both the first cooling element 61 and the second cooling element 62 are provided with multiple cooling channels 64. Each of the first cooling element 61 and the second cooling element 62 includes at least one partition 63 inside. The multiple cooling channels 64 include a first cooling channel 641 and a second cooling channel 642 disposed on both sides of the partition 63. The inlet end of the first cooling channel 641 is connected to the inlet end of the second cooling channel 642. The inlet end is separated by the partition 63, and the outlet end of the first cooling channel 641 is connected to the outlet end of the second cooling channel 642. The inlet end of the first cooling channel 641 and the inlet end of the second cooling channel 642 are separated by the partition 63, so that the cooling medium is split at the inlet end of the first cooling channel 641 and the inlet end of the second cooling channel 642. The outlet end of the first cooling channel 641 and the outlet end of the second cooling channel 642 are connected, which helps to improve the temperature uniformity between the first cooling channel 641 and the second cooling channel 642.

[0054] In some embodiments, the cooling component 6 has an inlet / outlet hole on the side of its surface away from the electrical connection assembly 10. A three-way pipe 65 is installed on the inlet / outlet hole. Two openings of the three-way pipe 65 are respectively connected to the cooling medium inlet pipe and the cooling medium outlet pipe. The other opening of the three-way pipe 65 is connected to the cooling channel 64 of the cooling component 6. In one specific embodiment, the three-way pipe 65 is connected to the cooling channel 64 located in the middle position among the three cooling channels 64 of the cooling component 6.

[0055] In some embodiments, as shown in Figures 6, 11, and 12, the flow channel assembly 20 further includes a first sealing member 91 and a second sealing member 92. The first sealing member 91 is disposed at one end of the flow channel assembly 20, and the second sealing member 92 is disposed at the other end of the flow channel assembly 20. The first sealing member 91 connects the first end of the cooling member 6 and the first end of the fire-fighting member 7. When the flow channel assembly 20 includes a first cooling member 61, a fire-fighting member 7, and a second cooling member 62 connected in sequence, the first sealing member 91 is configured to connect the first end of the first cooling member 61, the first end of the fire-fighting member 7, and the first end of the second cooling member 62. The first sealing member 91 includes a plurality of first sealing portions 911, wherein one first sealing portion 911 is adapted to block the opening of the first end of the first cooling member 61, another first sealing portion 911 is adapted to block the opening of the first end of the fire-fighting member 7, and another first sealing portion 911 is adapted to block the opening of the first end of the second cooling member 62.

[0056] The second sealing member 92 is configured to connect the second end of the cooling member 6 and the second end of the fire-fighting member 7, and the second sealing member 92 is also adapted to close the opening of the second end of the fire-fighting member 7. When the flow channel assembly 20 includes the first cooling member 61, the fire-fighting member 7 and the second cooling member 62 connected in sequence, the second sealing member 92 includes a second sealing part 921, which is used to close the opening of the second end of the fire-fighting member 7. The second sealing member 92 is also adapted to connect the cooling channel 64 of the first cooling member 61 and the cooling channel 64 of the second cooling member 62, thereby improving the temperature uniformity of the cooling channel 64 of the first cooling member 61 and the cooling channel 64 of the second cooling member 62, so as to improve the temperature uniformity between the tops of the multiple cells 200. Furthermore, by setting the first sealing member 91 and the second sealing member 92 to block both ends of the fire passage 74 of the fire-fighting component 7, the fire passage 74 of the fire-fighting component 7 and the cooling passage 64 of the cooling component 6 are constructed as independent and non-interfering channel structures. The cooling medium enters the cooling passage 64 of the second cooling component 62 through the cooling passage 64 of the first cooling component 61 and the passage of the second sealing member 92, forming a circulating loop. The flowing cooling medium serves as a heat exchange medium to achieve heat exchange between the multiple terminals 210 of the multiple cells 200 of the battery pack to reduce temperature.

[0057] When the explosion-proof valve 220 of the battery cell 200 is opened, the high-temperature and high-pressure combustible gas and high-temperature electrolyte will be discharged through the explosion-proof valve 220. The high-temperature and high-pressure gas and high-temperature electrolyte will be sprayed into the pressure relief tank 71 located directly above through multiple pressure relief holes and enter the fire passage 74. Since the pressure release of the high-temperature combustible gas occurs at the moment after the explosion-proof valve 220 of the battery cell 200 is opened, the high-temperature combustible gas has thermal dynamics, so that the high-temperature combustible gas will be discharged along the fire passage 74 through the inlet pipe 75 and the outlet pipe 76. When the chemical reaction inside the battery cell 200 weakens, the pressure relief and gas generation force also weakens. Fire extinguishing media can then be introduced into the fire escape 74 through the inlet pipe 75. Besides carrying away the high-temperature combustible gas and some heat from inside the fire escape 74, the fire extinguishing media can also enter the battery cell 200 through the pressure relief groove 71, pressure relief holes, and the explosion-proof valve 220 of the battery cell 200. This physically cools the battery cell 200 and inhibits the chemical reaction, preventing the battery cell 200 from undergoing a continuous chemical reaction after the explosion-proof valve 220 is opened, which could lead to an uncontrollable temperature rise and ultimately thermal runaway. The high-temperature combustible gas and corresponding electrolyte are directionally discharged through multiple pressure relief holes, the pressure relief groove 71, and the fire escape 74, preventing direct contact between the high-temperature combustible gas and high-temperature electrolyte and the battery cell 200's terminals 210, thus avoiding an internal electrical short circuit.

[0058] When the explosion-proof valve 220 of the battery cell 200 is opened, the cooling medium is continuously introduced into the cooling channel 64 of the cooling component 6, thereby cooling the battery cell 200, preventing the battery cell 200 from overheating, and reducing the possibility of uncontrollable temperature rise and thermal runaway.

[0059] In some embodiments, as shown in Figures 2, 13, and 17, the electrical connection assembly 10 includes a first heat-resistant element 1 and a connecting bus assembly 3. The first heat-resistant element 1 is disposed between the connecting bus assembly 3 and the flow channel assembly 20, and the side of the first heat-resistant element 1 facing away from the connecting bus assembly 3 is connected to the flow channel assembly 20. The first heat-resistant element 1 is adapted to rapidly transfer heat from the connecting bus assembly 3 and the battery cell 200 to the flow channel assembly 20 for cooling. The first heat-resistant element 1 is also adapted to provide electrical insulation to prevent direct contact between the connecting bus assembly 3 and the cooling element 6 and the fire-fighting element 7 of the flow channel assembly 20. Materials suitable for manufacturing the first heat-resistant element 1 include high-temperature resistant phlogopite.

[0060] In some embodiments, the first heat-resistant component 1 is provided with a plurality of first pressure relief holes 11, which are connected to the fire channel 74 through a pressure relief groove 71. The plurality of first pressure relief holes 11 are also connected to a plurality of explosion-proof valves 220 of a plurality of battery cells 200. The number of the plurality of first pressure relief holes 11 is set to be the same as the number of the plurality of battery cells 200, so that one explosion-proof valve 220 of a battery cell 200 corresponds to one first pressure relief hole 11, and one first pressure relief hole 11 corresponds to one pressure relief groove 71. This facilitates the independent pressure relief of each battery cell 200 and the input of extinguishing medium to each battery cell 200 in a thermal runaway state, thereby preventing the spread of heat.

[0061] In some embodiments, as shown in Figures 2 and 13, the electrical connection assembly 10 includes a thermally conductive medium 2 disposed between the first heat-resistant element 1 and the connecting bus assembly 3, so as to rapidly transfer the heat from the connecting bus assembly 3 and the heat from the electrode post 210 at the top of the battery cell 200 to the first heat-resistant element 1 and the cooling element 6 of the flow channel assembly 20 via the thermally conductive medium 2. In a specific embodiment, the thermally conductive medium 2 includes a thermally conductive gel, which is a flame-retardant insulating material, and the thermally conductive gel is also used to bond the first heat-resistant element 1 and the connecting bus assembly 3.

[0062] In some embodiments, as shown in Figures 2, 13 and 14, the electrical connection assembly 10 further includes a bracket 4, which has a plurality of mounting slots 41. The connection row assembly 3 includes a plurality of connection rows 33, each connection row 33 being installed in a mounting slot 41. Thermal conductive gel is also provided between the connection row 33 and the wall of the mounting slot 41 for fixation.

[0063] In some embodiments, the bracket 4 includes a plastic bracket, the suitable material of which is PC (Polycarbonate), and the suitable process for preparing the plastic bracket is a vacuum forming process. The thickness of the bracket 4 is set to 0.5 mm to improve the high temperature resistance and fire resistance of the bracket 4.

[0064] In some embodiments, the depth of the mounting groove 41 of the bracket 4 is greater than or equal to the thickness of the connecting strip 33, so as to fill more heat-conducting medium in the mounting groove 41 and facilitate the stable housing of the connecting strip 33 in the mounting groove 41.

[0065] In some embodiments, the bracket 4 is further provided with a plurality of clearance slots 42. Each connecting row 33 includes a first connecting portion 331, a second connecting portion 332, and an arched portion 34 disposed between the first connecting portion 331 and the second connecting portion 332. The first connecting portion 331 of the connecting row 33 is configured to connect a positive terminal post of two adjacent battery cells 200, and the second connecting portion 332 of the connecting row 33 is configured to connect a negative terminal post of two adjacent battery cells 200. The clearance slot 42 is configured to accommodate the arched portion 34 of the connecting row 33, and the depth of the clearance slot 42 is greater than the depth of the mounting groove 41. The clearance slot 42 is configured to be formed by the recess of the bottom wall of the mounting groove 41 so that the arched portion 34 of the connecting row 33 can be stably accommodated in the clearance slot 42.

[0066] In some embodiments, the bracket 4 is further provided with a plurality of blocking portions 43, each blocking portion 43 being disposed between two adjacent mounting slots 41 and protruding relative to the slot wall where the mounting slot 41 is located. The blocking portion 43 is configured to insulate two adjacent connecting bars 33, thereby increasing the creepage distance and electrical barrier gap between the two adjacent connecting bars 33. Furthermore, since a continuous blocking portion 43 is provided between the mounting slots 41 of two adjacent connecting bars 33, the flow path of the electrolyte of the battery cell 200 corresponding to the two adjacent connecting bars 33 can be effectively blocked.

[0067] In some embodiments, as shown in Figures 14 and 18, the bracket 4 further includes a plurality of fixing posts 44, wherein each mounting groove 41 is provided with two fixing posts 44, and the first connecting part 331 and the second connecting part 332 of the connecting strip 33 are each provided with a fixing hole. The fixing holes of the first connecting part 331 and the second connecting part 332 of the connecting strip 33 are respectively positioned and fixed with the two fixing posts 44 in the mounting groove 41. The fixing post 44 can be a hot riveting post.

[0068] In some embodiments, the bracket 4 is further provided with a welding groove 45 with an open bottom. Each mounting groove 41 is provided with two welding grooves 45, which correspond to the first connecting part 331 and the second connecting part 332 of the connecting bar 33, respectively. The electrode post 210 of the battery cell 200 passes through the welding groove 45 and is welded to the connecting bar 33.

[0069] In some embodiments, the bracket 4 further includes a plurality of first pressure relief protrusions 46, each of which is provided with a second pressure relief hole 461 to connect the fire escape 74 and an explosion-proof valve 220. In a specific embodiment, the second pressure relief hole 461 of each first pressure relief protrusion 46 corresponds to a first pressure relief hole 11 and is connected to the pressure relief groove 71 through the first pressure relief hole 11. The first pressure relief protrusions 46 protrude relative to the plane on which the bracket 4 is located, which is beneficial for providing pressure relief guidance.

[0070] In some embodiments, the bracket 4 further includes two partition bosses 47, which are located on both sides of the plurality of first pressure relief bosses 46, thereby effectively blocking the flow path of the electrolyte of the battery cell 200, so that the high temperature electrolyte is sprayed out in a direction through the first pressure relief hole 11, and the electrolyte is prevented from flowing to the connection row 33 on both sides.

[0071] In some embodiments, as shown in Figures 2, 13, 15 and 16, the electrical connection assembly 10 further includes a second heat-resistant element 5. The second heat-resistant element 5 is disposed on the side of the connection assembly 3 away from the first heat-resistant element 1. The second heat-resistant element 5 is provided with a plurality of clearance holes 51. The plurality of clearance holes 51 correspond to the plurality of terminals 210 of the plurality of battery cells 200 and are configured to avoid the terminals 210 of the battery cells 200, so that the terminals 210 of the battery cells 200 pass through the clearance holes 51 and the welding groove 45 of the bracket 4 in sequence and are welded to the connection assembly 33.

[0072] In some embodiments, the second heat-resistant component 5 further includes a plurality of second pressure relief bosses 52, each of which is provided with a third pressure relief hole 521, which connects the fire escape 74 and the explosion-proof valve 220. In a specific embodiment, the third pressure relief hole 521 connects the explosion-proof valve 220 and the second pressure relief hole 461.

[0073] In some embodiments, the second pressure relief boss 52 is configured to pass through the second pressure relief hole 461 of the first pressure relief boss 46 of the bracket 4 to communicate with the first pressure relief hole 11. Since the second pressure relief boss 52 protrudes relative to the plane where the second heat-resistant member 5 is located, it can provide a pressure relief guiding function, which is beneficial to achieve directional pressure relief.

[0074] In some embodiments, the second pressure relief boss 52 is configured to pass through the first pressure relief hole 11 of the first heat-resistant member 1 and communicate with the pressure relief groove 71 through the third pressure relief hole 521. Since the second pressure relief boss 52 protrudes relative to the plane where the second heat-resistant member 5 is located, it can provide a pressure relief guiding function, which is beneficial to achieve directional pressure relief.

[0075] In some embodiments, the sidewall of the second pressure relief boss 52 is provided with at least one opening 53 to facilitate folding of the second pressure relief boss 52. By making the sidewall of the second pressure relief boss 52 foldable, it is beneficial to fix the second heat-resistant member 5 to the first heat-resistant member 1. In a specific embodiment, during installation, the second pressure relief boss 52 of the second heat-resistant member 5 passes sequentially through the second pressure relief hole 461 of the first pressure relief boss 46 of the bracket 4 and the first pressure relief hole 11 of the first heat-resistant member 1, and then is bonded to the first heat-resistant member 1 by folding down the sidewall of the second pressure relief boss 52. This allows the second pressure relief boss 52 to achieve directional pressure relief while forming a stable connection between the second heat-resistant member 5 and the first heat-resistant member 1, which is beneficial to maintaining the stability of the directional pressure relief channel.

[0076] In some embodiments, the electrical connection assembly 10 further includes a data acquisition harness 21 connected to multiple connection rows 33 to acquire the temperature and voltage of the battery cell. Multiple cable ties are provided near the two sides of the bracket 4 to allow a securing strap to pass through and secure the data acquisition harness 21. An opening is provided on the outer wall of the mounting groove 41 of the bracket 4 to allow the data acquisition harness 21 to pass through and connect to the connection rows 33 located within the mounting groove 41. The data acquisition harness 21 is positioned away from the multiple first pressure relief protrusions 46 of the bracket 4 to maximize its distance from the pressure relief channels outside the battery cell within a reasonable wiring design.

[0077] In some embodiments, the connecting strip assembly 3, the bracket 4, and the second heat-resistant component 5 of the electrical connection assembly 10 are integrally supplied. The integrally supplied portion of the electrical connection assembly 10 is welded and fixed to the terminal post 210 of the battery cell 200. After welding and fixing, a heat-conducting medium 2 is provided on the surface of the connecting strip assembly 3 and inside the mounting groove 41 of the bracket 4. After the heat-conducting medium 2 covers the surface of the connecting strip assembly 3, the first heat-resistant component 1 is pasted on the connecting strip assembly 3, and an adhesive backing is pasted on the side of the first heat-resistant component 1 facing away from the heat-conducting medium 2 to paste the first heat-resistant component 1 onto the flow channel assembly 20. It is understood that by providing the first heat-resistant component 1 between the connecting strip assembly 3 and the insulating component 8 of the flow channel assembly 20, and by bonding the first heat-resistant component 1 to the insulating component 8 of the flow channel assembly 20, the flame-retardant performance of the battery end assembly 100 can be improved. If the connecting strip assembly 3 is directly pasted to the insulating component 8 of the flow channel assembly 20 with adhesive backing, the adhesive backing has poor flame-retardant performance and is easily ignited, which in turn causes the insulating component 8 to ignite. Furthermore, the adhesive backing is prone to attracting and adsorbing dust during the production process. This dust can affect the welding between the connecting assembly 3 and the terminal post 210 of the battery cell 200, leading to poor welding.

[0078] Embodiments of this application also provide an electrical device that includes a battery pack as described above, or a battery as described above. The electrical device may be a new energy vehicle, an energy storage device, or a power tool.

[0079] The embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A battery end assembly (100) for a battery, said battery comprising a plurality of cells (200), at least one of said cells (200) being provided with an explosion-proof valve (220), characterized in that, include: An electrical connection assembly (10) is configured to electrically connect multiple battery cells (200). The electrical connection assembly (10) is provided with multiple pressure relief holes, each of which is adapted to be corresponding to the explosion-proof valve (220). A flow channel assembly (20) includes a fire-fighting component (7), which is provided with a fire-fighting channel (74) that communicates with the multiple pressure relief holes.

2. The battery end assembly (100) according to claim 1, characterized in that, The flow channel assembly (20) further includes a cooling component (6) connected to the fire-fighting component (7), the cooling component (6) being connected to the electrical connection assembly (10) to cool the electrical connection assembly (10).

3. The battery end assembly (100) according to claim 2, characterized in that, The flow channel assembly (20) is connected to the side of the electrical connection assembly (10) away from the plurality of battery cells (200).

4. The battery end assembly (100) according to claim 1, characterized in that, The fire-fighting component (7) is configured to cover multiple of the pressure relief holes.

5. The battery end assembly (100) according to claim 2, characterized in that, The flow channel assembly (20) further includes an insulating member (8), a portion of which is disposed between the cooling member (6) and the electrical connection assembly (10), and another portion of which is disposed between the fire-fighting member (7) and the electrical connection assembly (10).

6. The battery end assembly (100) according to claim 2, characterized in that, The electrical connection assembly (10) includes a connection bar assembly (3), which includes a first set of connection bars (31) and a second set of connection bars (32). The first set of connection bars (31) and the second set of connection bars (32) are disposed on both sides of the plurality of pressure relief holes. The cooling component (6) includes a first cooling component (61) and a second cooling component (62). The fire-fighting component (7) is disposed between the first cooling component (61) and the second cooling component (62). The first cooling component (61) is disposed corresponding to the first set of connection bars (31) to cool the first set of connection bars (31), and the second cooling component (62) is disposed corresponding to the second set of connection bars (32) to cool the second set of connection bars (32).

7. The battery end assembly (100) according to claim 1, characterized in that, The fire-fighting component (7) is provided with a plurality of pressure relief grooves (71), each pressure relief groove (71) is configured to correspond to at least one pressure relief hole, and the pressure relief groove (71) is configured to connect the fire passage (74) and the pressure relief hole.

8. The battery end assembly (100) according to claim 7, characterized in that, The fire-fighting component (7) includes an inlet pipe (75) and an outlet pipe (76) connected to the fire passage (74); both the inlet pipe (75) and the outlet pipe (76) are adapted to depressurize; and / or, the inlet pipe (75) is also adapted to introduce extinguishing media; and / or, both the inlet pipe (75) and the outlet pipe (76) include fiberglass hoses.

9. The battery end assembly (100) according to claim 8, characterized in that, The fire-fighting component (7) includes a first surface (72) and a second surface (73) opposite each other along the thickness direction. The second surface (73) is connected to the electrical connection assembly (10). A plurality of pressure relief grooves (71) are disposed on the second surface (73). The inlet pipe (75) and the outlet pipe (76) are both disposed on the first surface (72).

10. The battery end assembly (100) according to claim 8, characterized in that, The fire-fighting component (7) is provided with a fire-fighting passage (74), which is a continuous passage extending along the length or width of the battery. The inlet pipe (75) is located near one end of the fire-fighting component (7), and the outlet pipe (76) is located near the other end of the fire-fighting component (7).

11. The battery end assembly (100) according to claim 1, characterized in that, The flow channel assembly (20) includes a first cooling element (61) and a second cooling element (62). Both the first cooling element (61) and the second cooling element (62) are provided with a plurality of cooling channels (64). The interior of both the first cooling element (61) and the second cooling element (62) includes at least one partition (63). The plurality of cooling channels (64) include a first cooling channel (641) and a second cooling channel (642) disposed on both sides of the partition (63). One end of the first cooling channel (641) is connected to one end of the second cooling channel (642), and the other end of the first cooling channel (641) and the other end of the second cooling channel (642) are separated by the partition (63).

12. The battery end assembly (100) according to claim 11, characterized in that, The flow channel assembly (20) includes a first sealing member (91) and a second sealing member (92); the first sealing member (91) is configured to connect a first end of the cooling member (6) and a first end of the fire-fighting member (7), and the first sealing member (91) is also adapted to close the opening (53) of the first end of the cooling member (6) and the opening (53) of the first end of the fire-fighting member (7); and / or, the second sealing member (92) is configured to connect a second end of the cooling member (6) and a second end of the fire-fighting member (7), and the second sealing member (92) is also adapted to close the opening of the second end of the fire-fighting member (7).

13. The battery end assembly (100) according to claim 12, characterized in that, One of the first sealing member (91) and the second sealing member (92) is also adapted to connect the cooling channel (64) of the first cooling member (61) and the cooling channel (64) of the second cooling member (62).

14. The battery end assembly (100) according to claim 1, characterized in that, The electrical connection assembly (10) includes a first heat-resistant element (1) and a connection row assembly (3). The first heat-resistant element (1) is disposed between the connection row assembly (3) and the flow channel assembly (20), and the side of the first heat-resistant element (1) facing away from the connection row assembly (3) is connected to the flow channel assembly (20).

15. The battery end assembly (100) according to claim 14, characterized in that, The first heat-resistant component (1) is provided with a plurality of first pressure relief holes (11), and the plurality of first pressure relief holes (11) are connected to the fire channel (74) and the plurality of explosion-proof valves (220).

16. The battery end assembly (100) according to claim 14, characterized in that, The electrical connection assembly (10) further includes a thermally conductive medium (2), which is disposed between the first heat-resistant element (1) and the connection assembly (3) and is adapted to bond the first heat-resistant element (1).

17. The battery end assembly (100) according to claim 14, characterized in that, The electrical connection assembly (10) further includes a bracket (4) having a plurality of mounting slots (41); the connection bar assembly (3) includes a plurality of connection bars (33), each of the connection bars (33) being installed in a mounting slot (41); and / or, the depth of the mounting slot (41) is greater than or equal to the thickness of the connection bar (33); and / or, the mounting slot (41) is further provided with a heat-conducting medium (2).

18. The battery end assembly (100) according to claim 17, characterized in that, The bracket (4) is also provided with a plurality of clearance slots (42), each of the connecting rows (33) includes an arch portion (34), the clearance slot (42) is configured to receive the arch portion (34) of the connecting row (33), and the depth of the clearance slot (42) is greater than the depth of the mounting slot (41).

19. The battery end assembly (100) according to claim 17, characterized in that, The bracket (4) is also provided with a barrier (43), which is disposed between two adjacent mounting slots (41) and is configured to insulate two adjacent connecting bars (33).

20. The battery end assembly (100) according to claim 17, characterized in that, The bracket (4) includes a plurality of fixing posts (44), each fixing post (44) is provided corresponding to a mounting slot (41), and the fixing post (44) is configured to fix the connecting row (33).

21. The battery end assembly (100) according to claim 17, characterized in that, The bracket (4) is also provided with a plurality of first pressure relief protrusions (46), each of the first pressure relief protrusions (46) being provided with a second pressure relief hole (461) to connect the fire passage (74) and the explosion-proof valve (220).

22. The battery end assembly (100) according to claim 17, characterized in that, The electrical connection assembly (10) further includes a second heat-resistant component (5), which is disposed on the side of the connection assembly (3) away from the first heat-resistant component (1). The second heat-resistant component (5) is provided with a plurality of clearance holes (51), which are configured to avoid the terminal post (210) of the battery cell (200).

23. The battery end assembly (100) according to claim 22, characterized in that, The second heat-resistant component (5) includes a plurality of second pressure relief bosses (52); each second pressure relief boss (52) is provided with a third pressure relief hole (521) to connect the fire passage (74) and the explosion-proof valve (220); and / or, the bracket (4) is also provided with a plurality of first pressure relief bosses (46), each first pressure relief boss (46) is provided with a second pressure relief hole (461), and each second pressure relief boss (52) is configured to pass through a second pressure relief hole (461); and / or, the first heat-resistant component (1) is provided with a plurality of first pressure relief holes (11), and the second pressure relief boss (52) is configured to pass through the first pressure relief hole (11).

24. The battery end assembly (100) according to claim 23, characterized in that, The second pressure relief boss (52) has at least one opening (53) on its side wall to facilitate the folding of the second pressure relief boss (52).

25. A battery, characterized in that, The battery includes a battery end assembly (100) as described in any one of claims 1 to 24 and a plurality of battery cells (200), wherein the battery end assembly (100) is disposed on top of the plurality of battery cells (200).

26. A battery pack, characterized in that, The battery pack includes the battery of claim 24, or the battery pack includes a battery end assembly (100) of any one of claims 1 to 24.

27. An electrical appliance, characterized in that, The electrical device includes the battery pack as claimed in claim 26, or the battery as claimed in claim 25, or the battery end assembly (100) as claimed in any one of claims 1 to 24.

Images