Pole core assembly, single battery, battery pack and electric device

Abstract

The utility model provides a pole core assembly, a single battery, a battery pack comprising the single battery and an electric device comprising the battery pack or the single battery. The pole core assembly comprises a plurality of pole cores and an electrode leading-out piece, the pole cores are conductively connected, each pole core comprises a pole core body and a first electric connecting piece which are conductively connected, and the first electric connecting piece of at least one pole core penetrates through the electrode leading-out piece and is conductively connected with the electrode leading-out piece. The complex structure that a plurality of single batteries are connected in series or in parallel in the prior art is reduced, meanwhile, when the pole core assembly is applied to the single battery, one single battery can reach the total capacity of the plurality of single batteries in the prior art, and shells of the plurality of single batteries in the prior art are reduced.

Description

Technical Field

[0001] The present disclosure relates to the field of batteries, and in particular, to a pole core assembly, a single cell including the pole core assembly, a battery pack including the single cell, and an electrical device including the battery pack or the single cell. Background Art

[0002] At present, in order to increase the capacity of the battery system, battery manufacturers are connecting single batteries in series and parallel to expand the capacity. There is no major change in the structure. The battery assembly is complicated and the connection structure between batteries is cumbersome. Therefore, it is necessary to design a simpler battery with higher capacity. Utility Model Content

[0003] In order to overcome the above technical problems, the present disclosure provides a pole core assembly, a single cell including the pole core assembly, a battery pack including the single cell, and an electrical device including the battery pack or the single cell.

[0004] The first object of the present disclosure is to provide a pole core assembly, including multiple pole cores and electrode lead-out pieces, wherein the multiple pole cores are conductively connected, the pole cores include a conductively connected pole core body and a first electrical connector, and the first electrical connector of at least one pole core passes through the electrode lead-out piece and is conductively connected to the electrode lead-out piece.

[0005] As an optional solution of the present disclosure, the electrode lead-out member is provided with a plurality of first through holes, and the plurality of first through holes are arranged one-to-one correspondingly to the first electrical connectors of the plurality of pole cores, and the first electrical connectors of the plurality of pole cores respectively pass through the plurality of first through holes and are conductively connected to the electrode lead-out member.

[0006] As an optional solution of the present disclosure, the pole core assembly also includes an isolation assembly, which is arranged between the multiple pole core bodies and the electrode lead-out pieces. The isolation assembly is provided with multiple second through holes, and the multiple second through holes are arranged one-to-one corresponding to the multiple first through holes. The first electrical connectors of the multiple pole cores respectively pass through the multiple second through holes and are conductively connected to the electrode lead-out pieces.

[0007] As an optional solution of the present disclosure, the first electrical connector includes a pole lug and a pole lug connector, the pole lug is connected to the pole core body, one end of the pole lug connector is conductively connected to the pole lug, and the other end of the pole lug connector passes through the electrode lead-out member and is conductively connected to the electrode lead-out member.

[0008] As an optional solution of the present disclosure, the pole core assembly further includes a shell with at least one end open, and the plurality of pole cores are accommodated in the shell.

[0009] As an optional solution of the present disclosure, at least one partition is provided in the shell, and the at least one partition divides the shell into a plurality of accommodating grooves, and each accommodating groove accommodates at least one pole core.

[0010] As an optional solution of the present disclosure, the partition and the shell are integrally formed.

[0011] As an optional solution of the present disclosure, the electrode lead-out member includes a second electrical connector and a pole, the second electrical connector is conductively connected to the pole, the first electrical connector of at least one pole core passes through the second electrical connector and is conductively connected to the second electrical connector, and the pole is used to lead out the electrode.

[0012] As an optional scheme of the present disclosure, multiple pole cores are arranged side by side, the first electrical connector includes a first sub-electrical connector and a second sub-electrical connector, the multiple first sub-electrical connectors are located at the same end of the multiple pole core bodies, and the multiple second sub-electrical connectors are located at the other opposite end of the multiple pole core bodies, the electrode lead-out parts include a first electrode lead-out part and a second electrode lead-out part, the multiple first sub-electrical connectors all pass through the first electrode lead-out part and are conductively connected to the first electrode lead-out part, and the multiple second sub-electrical connectors all pass through the second electrode lead-out part and are conductively connected to the second electrode lead-out part.

[0013] As an optional solution of the present disclosure, the first electrical connector of the pole core is welded to the electrode lead-out piece.

[0014] A second objective of the present disclosure is to provide a single cell battery, comprising a shell body, a cover plate, and a pole core assembly provided by the present disclosure, wherein the pole core assembly is disposed in the shell body, and the cover plate seals the shell body.

[0015] As an optional solution of the present disclosure, the electrode lead-out member includes a second electrical connector and a pole, the second electrical connector is conductively connected to the pole, a first electrical connector of at least one pole core passes through the second electrical connector and is conductively connected to the second electrical connector, and the pole passes through the cover plate for leading the electrode outward.

[0016] As an optional solution of the present disclosure, the single cell further includes an insulating seal, which is disposed between the cover plate and the pole, and is used for insulating and connecting the pole and the cover plate.

[0017] As an optional solution of the present disclosure, the single cell further includes a spacer, which is arranged between the cover plate and the second electrical connector, and the pole passes through the spacer.

[0018] As an optional solution of the present disclosure, the single cell further includes at least one explosion-proof valve, and the at least one explosion-proof valve is disposed on the shell body or the cover plate.

[0019] As an optional solution of the present disclosure, there are two explosion-proof valves, the cover plate includes a first cover plate and a second cover plate, the first cover plate and the second cover plate respectively close the opposite ends of the shell body, the two explosion-proof valves are respectively arranged on the first cover plate and the second cover plate, and the two explosion-proof valves are staggered.

[0020] As an optional solution of the present disclosure, at least one connecting hole is provided on the shell body or the cover plate, and the connecting hole is provided on one side of the explosion-proof valve, and the connecting hole is used to connect with an external pipeline so that the pipeline is connected to the explosion-proof valve.

[0021] As an optional solution of the present disclosure, at least one liquid injection hole is provided on the shell body or the cover plate.

[0022] As an optional scheme of the present disclosure, the cover plate includes a first cover plate and a second cover plate arranged opposite to each other; a plurality of pole cores are arranged side by side, the first electrical connector includes a first sub-electrical connector and a second sub-electrical connector, the plurality of first sub-electrical connectors are located between the plurality of pole core bodies and the first cover plate, and the plurality of second sub-electrical connectors are located between the plurality of pole core bodies and the second cover plate; the electrode lead-out member includes a first electrode lead-out member and a second electrode lead-out member, the plurality of first sub-electrical connectors all pass through the second electrical connector of the first electrode lead-out member and are conductively connected to the second electrical connector of the first electrode lead-out member, and the pole of the first electrode lead-out member passes through the first cover plate to lead out the first electrode; the plurality of second sub-electrical connectors all pass through the second electrical connector of the second electrode lead-out member and are conductively connected to the second electrical connector of the second electrode lead-out member, and the pole of the second electrode lead-out member passes through the second cover plate to lead out the second electrode.

[0023] A third object of the present disclosure is to provide a battery pack, comprising a housing and a single cell disposed in the housing, wherein the single cell is the single cell provided by the present disclosure.

[0024] A fourth object of the present disclosure is to provide an electrical device, wherein the electrical device is provided with the battery pack provided by the present disclosure or the single battery provided by the present disclosure.

[0025] The present invention discloses a method of conductively connecting a plurality of pole cores to each other, and conductively connecting a first electrical connector of at least one pole core to the electrode lead-out piece directly through the electrode lead-out piece, so that the connection structure is simple, thereby reducing the complicated structure of connecting a plurality of single cells in series or in parallel in the prior art. At the same time, when the pole core assembly is applied to a single cell, a single cell can reach the total capacity of a plurality of single cells in the prior art, thereby reducing the outer shells of a plurality of single cells in the prior art.

[0026] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0028] Figure 1 It is a schematic diagram of the internal installation structure of a single cell provided according to an embodiment of the present disclosure.

[0029] Figure 2 It is a schematic structural diagram of the outer shell of a pole core assembly provided according to an embodiment of the present disclosure.

[0030] Figure 3 It is a schematic structural diagram of an electrode lead-out member provided according to an embodiment of the present disclosure.

[0031] Figure 4 It is a schematic structural diagram of a first electrode lead-out member provided according to an embodiment of the present disclosure.

[0032] Figure 5 is a schematic structural diagram of a second electrode lead-out member provided according to an embodiment of the present disclosure.

[0033] Figure 6 It is a schematic structural diagram of a pole core provided according to one embodiment of the present disclosure.

[0034] Figure 7 It is a schematic structural diagram of a tab connector provided according to an embodiment of the present disclosure.

[0035] Figure 8 It is a schematic diagram of the structure of an isolation assembly provided according to an embodiment of the present disclosure.

[0036] Fig. 9 It is a schematic structural diagram of a first isolation component provided according to an embodiment of the present disclosure.

[0037] Fig.10 It is a schematic structural diagram of a second isolation assembly provided according to an embodiment of the present disclosure.

[0038] Fig.11 It is a structural schematic diagram of the appearance of a single cell provided according to an embodiment of the present disclosure.

[0039] Fig.12 It is a connection diagram of a first explosion-proof valve connected to an external pipeline according to an embodiment of the present disclosure.

[0040] Fig.13 It is a connection diagram of a second explosion-proof valve connected to an external pipeline according to an embodiment of the present disclosure.

[0041] Fig.14 It is a structural schematic diagram of the appearance of a single cell provided according to an embodiment of the present disclosure.

[0042] Fig.15 It is a structural schematic diagram of the appearance of a single cell provided according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0043] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0044] In the present disclosure, unless otherwise specified, directional words such as "up, down, left, right" are generally defined based on the drawing direction of the corresponding drawings, and "inside and outside" refer to the inside and outside of the corresponding component outline.

[0045] like Figures 1 to 15 As shown, the present disclosure provides a technical solution for a pole core assembly, a single cell, a battery device using the single cell, and an electrical device using the battery device or the single cell. Among them, a plurality of single cells are placed in the battery device in series or in parallel. In addition, in addition to the field of battery devices, the various technical solutions provided in the present disclosure can also be widely used in other battery fields.

[0046] In order to clarify the technical solution of the present disclosure, the present disclosure is described through the following specific embodiments, but is not limited to these specific embodiments, and the features in each embodiment can be combined or replaced arbitrarily.

[0047] In an optional embodiment, the pole core assembly 10 provided by the present disclosure includes multiple pole cores 600 and electrode lead-out pieces 11, the electrode lead-out pieces 11 are used to electrically connect to the pole cores 600 and lead out electrodes; the multiple pole cores 600 are conductively connected, the pole cores 600 are a laminated structure or a winding structure, the pole cores 600 include a conductively connected pole core body 6001 and a first electrical connector 16, the first electrical connector 16 of at least one pole core 600 passes through the electrode lead-out piece 11 and is conductively connected to the electrode lead-out piece 11, the conductive connection method can be welding or twisting connection, this connection structure is simple, and reduces the cumbersome structure of connecting multiple single cells in series or in parallel in the prior art.

[0048] In a specific embodiment, Figure 1 , Figure 3 , Figure 4 , Figure 5 As shown, the electrode lead-out member 11 includes a first electrode lead-out member 111 and a second electrode lead-out member 112, and the first electrical connector 16 includes a first sub-electrical connector 601 and a second sub-electrical connector 602. The first sub-electrical connector 601 of the pole core 600 passes through the first electrode lead-out member 111 and is conductively connected to the first electrode lead-out member 111, and the second sub-electrical connector 602 of the pole core 600 passes through the second electrode lead-out member 112 and is conductively connected to the second electrode lead-out member 112. This arrangement of the electrode lead-out member 11 and the first electrical connector 16 can make the conductive connection more convenient.

[0049] In an optional embodiment, the electrode lead-out member 11 is provided with a plurality of first through holes 15, and the first through holes 15 are used to allow the first electrical connector 16 to pass through the electrode lead-out member 11 and be conductively connected to the electrode lead-out member 11; the plurality of first through holes 15 are arranged in a one-to-one correspondence with the first electrical connectors 16 of the plurality of pole cores 600, so as to facilitate the first electrical connector 16 to accurately pass through the first through holes 15; the first electrical connectors 16 of the plurality of pole cores 600 respectively pass through the plurality of first through holes 15 and are conductively connected to the electrode lead-out member 11, and the arrangement and manufacture of the first through holes 15 are simpler and the connection is more convenient.

[0050] In a specific embodiment, Figure 3 , Figure 4 , Figure 5 , Figure 6As shown, the first through hole 15 includes a first sub-through hole 1114 and a second sub-through hole 1116, the first sub-through hole 1114 is arranged in a one-to-one correspondence with the first sub-electrical connectors 601 of the plurality of pole cores 600, the second sub-through hole 1116 is arranged in a one-to-one correspondence with the second sub-electrical connectors 602 of the plurality of pole cores 600, the first sub-electrical connectors 601 of the plurality of pole cores 600 are respectively conductively connected to the first electrode lead-out member 111 through the first sub-through hole 1114, and the second sub-electrical connectors 602 of the plurality of pole cores 600 are respectively conductively connected to the second electrode lead-out member 112 through the second sub-through hole 1116, and the arrangement of the plurality of first sub-through holes 1114 and the second sub-through holes 1116 is to realize the conductive connection between the first sub-electrical connector 601 and the second sub-electrical connector 602 and the first electrode lead-out member 111 and the second electrode lead-out member 112, respectively. The first sub-electrical connector 601 includes a first pole ear 6011 and a first pole ear connector 6012, the second sub-electrical connector 602 includes a second pole ear 6021 and a second pole ear connector 6022, the width of the first sub-through hole 1114 is the thickness of the first pole ear connector 6012 plus 5 mm, the width of the second sub-through hole 1116 is the thickness of the second pole ear connector 6022 plus 5 mm, the length of the first sub-through hole 1114 is the width of the first pole ear connector 6012 plus 10 mm, the length of the second sub-through hole 1116 is the width of the second pole ear connector 6022 plus 10 mm, and both ends of the first sub-through hole 1114 and the second sub-through hole 1116 are semicircular, ensuring that all first sub-electrical connectors 601 and second sub-electrical connectors 602 can pass through with gaps left. The first electrode lead-out member 111 includes a third sub-connector 1111 and a first pole 700, the second electrode lead-out member 112 includes a fourth sub-connector 1112 and a second pole 800, and the electrode lead-out member 11 is also provided with a plurality of first flow holes 17, the first flow holes 17 ensure that the electrolyte can flow evenly into various areas inside the battery during injection, and the gas generated inside the battery is also effectively discharged through the first flow holes 17; the first flow hole 17 includes a first sub-flow hole 1113 and a second sub-flow hole 1115, and the third sub-connector 1111 is located relative to the first sub-through hole 1114. A first sub-flow hole 1113 is opened, and a second sub-flow hole 1115 is opened at a position of the fourth sub-connector 1112 relative to the second sub-through hole 1116. The length of the first sub-flow hole 1113 should be smaller than the first sub-through hole 1114, and the length of the second sub-flow hole 1115 should be smaller than the second sub-through hole 1116. The widths of the first sub-flow hole 1113 and the second sub-flow hole 1115 should both be 20 mm to 30 mm. The first sub-flow hole 1113 is located between the two first sub-through holes 1114, and the second sub-flow hole 1115 is located between the two second sub-through holes 1116. The length, width and position of the first sub-flow hole 1113 and the second sub-flow hole 1115 are set in such a way as to ensure that the first sub-flow hole 1113 and the second sub-flow hole 1115 are respectively set at and do not exceed the third sub-connector 1111 and the fourth sub-connector 1112.

[0051] In an optional embodiment, the pole core assembly 10 further includes an isolation assembly 18, which is disposed between the plurality of pole core bodies 6001 and the electrode lead-out member 11, and the isolation assembly 18 can protect and guide the pole core 600 to extend and support the electrode lead-out member 11; the isolation assembly 18 is provided with a plurality of second through holes 19, and the second through holes 19 are used to allow the first electrical connector 16 of the pole core 600 to pass through; the plurality of second through holes 19 are arranged one by one with the plurality of first through holes 15, and the first electrical connectors 16 of the plurality of pole cores 600 respectively pass through the plurality of second through holes 19 and are electrically connected to the electrode lead-out member 11, and the second through holes 19 and the first through holes 15 are arranged correspondingly to facilitate the first electrical connector 16 of the pole core 600 to accurately pass through the second through holes 19 and the first through holes 15 at the same time. The arrangement of the second through holes is simpler to manufacture and more convenient to connect.

[0052] In a specific embodiment, Figure 1 , Figure 8 , Fig. 9 , Fig.10As shown, the isolation component 18 includes a first isolation component 101 and a second isolation component 102, the first isolation component 101 is arranged between the pole core body and the first electrode lead-out piece 111, and the second isolation component 102 is arranged between the pole core body and the second electrode lead-out piece 112. The arrangement of the first isolation component 101 and the second isolation component 102 is more convenient for protecting the guide pole ear 60 from extending and supporting the electrode lead-out piece 11; the second through hole 19 includes a third sub-through hole 104 and a fourth sub-through hole 106, and the first isolation component 101 is provided with a plurality of third sub-through holes 104, and the third sub-through holes 104 are arranged one by one with the first sub-through holes 1114, which is convenient for the pole core The first sub-electrical connector 601 of 600 passes through the third sub-through hole 104 and the first sub-through hole 1114 and is conductively connected to the first electrode lead-out member 111 respectively; the second isolation component 102 is provided with a plurality of fourth sub-through holes 106, and the fourth sub-through holes 106 and the second sub-through holes 1116 are arranged one by one, so that the second sub-electrical connector 602 of the pole core 600 passes through the fourth sub-through hole 106 and the second sub-through hole 1116 and is conductively connected to the second electrode lead-out member 112 respectively; the isolation component 18 is also provided with a plurality of second flow holes 20, and the second flow holes 20 ensure that the electrolyte can flow evenly into various areas inside the battery during injection, and the gas generated inside the battery is also It is effectively excluded through the second flow hole 20; the second flow hole 20 includes a plurality of third sub-flow holes 103 and a fourth sub-flow hole 105, the first isolation component 101 opens a third sub-flow hole 103 at a position relative to the third sub-through hole 104, the second isolation component 102 starts a fourth sub-flow hole 105 at a position relative to the fourth sub-through hole 106, the third sub-flow hole 103 and the fourth sub-flow hole 105 are respectively the same in size and position as the first sub-flow hole 1113 and the second sub-flow hole 1115; buckles 21 can be respectively provided at both ends and sides of the isolation component 18, and the buckles 21 facilitate the locking of the isolation component 18 and the housing 500; the buckles 21 include The first buckle 1018 and the second buckle 1019, the first buckle 1018 is designed on the first isolation component 101, and the second buckle 1019 is designed on the second isolation component 102, the first isolation component 101 and the second isolation component 102 are respectively installed on the shell 500 through the first buckle 1018 and the second buckle 1019; the thickness of the first isolation component 101 and the second isolation component 102 are both greater than 1.5 mm, and the thickness is set to ensure the stability of the mechanical structure. The space close to the pole core 600 side must ensure that the first pole ear 6011 and the second pole ear 6021 cannot be pressed to cause the first pole ear 6011 and the second pole ear 6021 to bend.

[0053] In an optional embodiment, the first electrical connector 16 includes a pole lug 60 and a pole lug connector 61, and the pole lug connector 61 is configured to be conductively connected to the electrode lead-out member 11; the pole lug 60 is connected to the pole core body 6001, one end of the pole lug connector 61 is conductively connected to the pole lug 60, and the other end of the pole lug connector 61 passes through the electrode lead-out member 11 and is conductively connected to the electrode lead-out member 11. The configuration of the pole lug connector 61 increases the length of the pole lug 60, facilitating the conductive connection between the pole lug 60 and the electrode lead-out member 11.

[0054] In a specific embodiment, Figure 1 , Figure 6 , Figure 7As shown, the pole ear 60 includes a first pole ear 6011 and a second pole ear 6021, the first pole ear 6011 is a positive pole ear, and the second pole ear 6021 is a negative pole ear; the pole ear connector 61 includes a first pole ear connector 6012 and a second pole ear connector 6022, the first pole ear 6011 is arranged at the same end of the pole core 600, and the second pole ear 6021 is arranged at the other end of the pole core 600, one end of the first pole ear connector 6012 is conductively connected to the first pole ear 6011, and one end of the second pole ear connector 6022 is conductively connected to the second pole ear 6021, and the first pole ear 6011 and the second pole ear 6021 are not sealed, and the first pole ear is coated. Pre-welding of the pole ear 6011 and the second pole ear 6021, connecting the first pole ear 6011 of each layer together, connecting the second pole ear 6021 of each layer together, and after completion, welding the first pole ear 6011 and the second pole ear 6021 with the first pole ear connector 6012 and the second pole ear connector 6022 respectively, the corners of the first pole ear connector 6012 and the second pole ear connector 6022 can be chamfered, the width of the first pole ear connector 6012 and the second pole ear connector 6022 is designed according to the size of the first pole ear 6011 and the second pole ear 6021, the first pole ear connector 6012 needs to be larger than the first pole ear 6011 to completely cover the first pole ear 6011. The pole ear 6011, the second pole ear connector 6022 needs to be larger than the second pole ear 6021 to completely cover the second pole ear 6021; the other end of the first pole ear connector 6012 passes through the first electrode lead-out member 111 and is conductively connected to the first electrode lead-out member 111, and the other end of the second pole ear connector 6022 passes through the second electrode lead-out member 112 and is conductively connected to the second electrode lead-out member 112. The length of the first pole ear connector 6012 and the second pole ear connector 6022 can be set to meet the current capacity of the pole core 600 after welding with the third sub-connector 1111 and the fourth sub-connector 1112 respectively; the length of the pole core 600 can be 6 00mm to 1200mm, the thickness can be between 10mm and 30mm, the width can be between 60mm and 200mm, and can be specifically set according to the use environment; the pole core 600 is fixed with tape and its outside is wrapped with an insulating film; the pole ear connector 61 is also provided with a groove 19, the groove 19 includes a first groove 6013 and a second groove 6023, the side of the first pole ear connector 6012 can be provided with a first groove 6013 in its width direction, and the side of the second pole ear 6021 can be provided with a second groove 6023 in its width direction, and the first groove 6013 and the second groove 6023 are both used for fixed positioning during welding.

[0055] In an optional embodiment, the pole core assembly 10 further includes a shell 500 with at least one end open, and a plurality of pole cores 600 are accommodated in the shell 500 to encapsulate and fix the pole cores 600.

[0056] In a specific embodiment, Figure 2 As shown, the shell 500 is made of high-temperature engineering plastic and is resistant to electrolyte corrosion. Its size is designed according to the size of the pole core 600. The number of pole cores 600 that can be arranged is greater than 2 and less than 40. From a safety perspective, the number of pole cores 600 is limited; the pole core 600 is loaded into the shell 500, and the length of the shell 500 needs to completely cover the length of the pole core 600, with only the first sub-electrical connector 601 and the second sub-electrical connector 602 exposed outside, so as to facilitate the conductive connection between the first sub-electrical connector 601 and the first electrode lead-out member 111, and facilitate the conductive connection between the second sub-electrical connector 602 and the second electrode lead-out member 112; the sides and sides of the shell 500 and the upper and lower large surfaces are all sealed and have a mechanical structure support frame, and the upper plate, lower plate, right plate and left plate of the shell 500 are processed with snap grooves that are locked with the first isolation component 101 and the second isolation component 102, which are used to be fastened to the first isolation component 101 and the second isolation component 102 respectively.

[0057] In an optional embodiment, at least one partition 502 is provided in the outer shell 500, and the at least one partition 502 divides the outer shell 500 into a plurality of receiving grooves 501, each receiving groove 501 receives at least one pole core 600, and the partition 502 separates the pole core 600, and the receiving groove 501 is used to place the pole core 600, and the partition 502 is simpler to manufacture and more convenient to connect.

[0058] In a specific embodiment, Figure 2 As shown, the width of the accommodating groove 501 and the thickness of the partition 502 are designed according to the thickness of the pole core 600, which should be able to ensure that the pole core 600 will not shift or loosen during operation, and will not cause bulging of the pole core 600 due to excessive gap during battery charging and discharging, nor will the pole core 600 be excessively squeezed due to excessive gap. The thickness of the partition 502 can be greater than or equal to 15 mm. In order to ensure the stability of the mechanical structure; each accommodating groove 501 is bonded to the large surface of the pole core 600 with a high-temperature resistant insulating material to insulate the pole core 600 and place it in the accommodating groove 501.

[0059] In an optional implementation, the partition 502 and the housing 500 are formed as an integral part to simplify the design and facilitate welding.

[0060] In an optional embodiment, the electrode lead-out member 11 includes a second electrical connector 13 and a pole 14, the second electrical connector 13 and the pole 14 are conductively connected, the first electrical connector 16 of at least one pole core 600 passes through the second electrical connector 13 and is conductively connected to the second electrical connector 13, the pole 14 is used to lead out the electrode, and the conductive connection method can be welding or twisting connection. This connection structure is simple and reduces the cumbersome structure of connecting multiple single cells in series or in parallel in the prior art.

[0061] In a specific embodiment, Figure 1 , Figure 3 , Figure 4 , Figure 5 As shown, the second electrical connector 13 is used to lead out the first electrical connector 16 of the pole core 600 and realize the conductive connection with the second electrical connector 13, the second electrical connector 13 includes a third sub-connector 1111 and a fourth sub-connector 1112, the pole 14 includes a first pole 700 and a second pole 800, the third sub-connector 1111 is conductively connected to the first pole 700, the fourth sub-connector 1112 is conductively connected to the second pole 800, the first sub-electrical connector 601 of at least one pole core 600 passes through the third sub-connector 1111 and is conductively connected to the third sub-connector 1111, the second sub-electrical connector 602 of at least one pole core 600 passes through the fourth sub-connector 1112 and is conductively connected to the fourth sub-connector 1112, and the third sub-connector 1111 and the fourth sub-connector 1112 are respectively arranged at both ends of the pole core 600 for more convenient conductive connection; the first pole 700 is used to lead out the first electrode, and the second pole 80 0 is used to lead out the second electrode, the first pole 700 and the second pole 800 can be rectangular or circular, and can be specifically set according to the use environment; the thickness of the third sub-connector 1111 and the fourth sub-connector 1112 can be greater than 1.5 mm, in order to ensure the stability of the mechanical structure; the length and width dimensions are designed according to the size and quantity of the pole core 600, and can be specifically set according to the use environment to meet the connection between all the first sub-electrical connectors 601 and the third sub-connector 1111, and the connection between all the second sub-electrical connectors 602 and the fourth sub-connector 1112; the four corners of the third sub-connector 1111 can avoid the first pole ear connector 6012 and the first isolation component 101 using bolts to fasten, and the four corners of the fourth sub-connector 1112 can avoid the second pole ear connector 6022 and the second isolation component 102 using bolts to fasten, so as to achieve the technical effect of fixing the second electrical connector and the isolation component without destroying the structure of the pole core 600.

[0062] An optional implementation, such as Figure 1 , Figure 6As shown, a plurality of pole cores 600 are arranged side by side, the first electrical connector 16 includes a first sub-electrical connector 601 and a second sub-electrical connector 602, the plurality of first sub-electrical connectors 601 are located at the same end of the plurality of pole core bodies 6001, the plurality of second sub-electrical connectors 602 are located at the other opposite end of the plurality of pole core bodies 6001, the electrode lead-out member 11 includes a first electrode lead-out member 111 and a second electrode lead-out member 112, the plurality of first sub-electrical connectors 601 all pass through the first electrode lead-out member 111 and are conductively connected to the first electrode lead-out member 111, Multiple second sub-electrical connectors 602 all pass through the second electrode lead-out member 112 and are conductively connected to the second electrode lead-out member 112, so that the first sub-electrical connector 601 and the second sub-electrical connector 602 of the pole core 600 can respectively pass through the first electrode lead-out member 111 and the second electrode lead-out member 112 and be conductively connected thereto. This method of respectively arranging the first sub-electrical connector 601 and the second sub-electrical connector 602 and the first electrode lead-out member 111 and the second electrode lead-out member 112 at both ends of the pole core assembly 10 makes the structure simpler and more convenient.

[0063] In an optional implementation, the first electrical connector 16 of the pole core 600 is welded to the electrode lead-out member 11 , and the welding connection method is more cost-effective and simpler.

[0064] In a specific embodiment, Figure 1 , Figure 6 As shown, the first sub-electrical connector 601 is welded to the first electrode lead-out member 111 , and the second sub-electrical connector 602 is welded to the second electrode lead-out member 112 , so that both ends of the pole core 600 are connected to the electrode lead-out member 11 .

[0065] In an optional embodiment, the single cell 00 provided by the present disclosure is as follows: Figure 1 , Fig.11 , Fig.14 , Fig.15 As shown, the single cell 00 includes a shell body 01, a cover plate 02 and a pole core assembly 10 provided by the present invention. The shell body 01 is an outer shell with openings at both ends. The pole core assembly 10 is arranged in the shell body 01. The cover plate 02 closes the shell body 01, so as to make the pole core assembly 10 enclosed in the single cell 00.

[0066] In an optional embodiment, the electrode lead-out member 11 includes a second electrical connector 13 and a pole 14, the second electrical connector 13 is conductively connected to the pole 14, the first electrical connector 16 of at least one pole core 600 passes through the second electrical connector 13 and is conductively connected to the second electrical connector 13, the pole 14 passes through the cover plate 02, and is used to lead the electrode outward. This connection structure is simple and reduces the complicated structure of connecting multiple single cells in series or in parallel in the prior art. When the pole core assembly 10 is applied to a single cell 00, one single cell 00 can reach the total capacity of multiple single cells 00 in the prior art, reducing the outer shell of multiple single cells 00 in the prior art.

[0067] In a specific embodiment, Figure 1 , Figure 3 , Figure 4 , Figure 5 As shown, the second electrical connector 13 includes a third sub-connector 1111 and a fourth sub-connector 1112, the pole 14 includes a first pole 700 and a second pole 800, the cover 02 includes a first cover 100 and a second cover 200, the third sub-connector 1111 is conductively connected to the first pole 700, the fourth sub-connector 1112 is conductively connected to the second pole 800, the first sub-electrical connector 601 of at least one pole core 600 passes through the third sub-connector 1111 and is conductively connected to the third sub-connector 1111, and the second sub-electrical connector 601 of at least one pole core 600 is conductively connected to the third sub-connector 1111. 02 passes through the fourth sub-connector 1112 and is conductively connected to the fourth sub-connector 1112. The third sub-connector 1111 and the fourth sub-connector 1112 are respectively arranged at both ends of the pole core 600, which is more convenient for conductive connection; the first pole 700 passes through the first cover plate 100 for leading out the first electrode, and the second pole 800 passes through the second cover plate 200 for leading out the second electrode. The first pole 700 and the second pole 800 can be rectangular or circular, and can be specifically set according to the use environment. The design of the two poles 14 is used to ensure that each electrode can be led out.

[0068] In an optional embodiment, the single cell 00 also includes an insulating seal 04, which is arranged between the cover plate 02 and the pole 14. The insulating seal 04 is used to insulate the pole 14 and the cover plate 02. The insulating seal 04 can effectively prevent the single cell 00 from short circuiting and leakage. The setting of the insulating seal 04 makes the connection method more convenient.

[0069] In a specific embodiment, Figure 1As shown, the insulating seal 04 includes a first insulating seal 701 and a second insulating seal 801. The first insulating seal 701 is arranged between the first cover plate 100 and the first pole 700, and the first insulating seal 701 is used to insulate and connect the first pole 700 and the first cover plate 100. The second insulating seal 801 is arranged between the second cover plate 200 and the second pole 800, and the second insulating seal 801 is used to insulate and connect the second pole 800 and the second cover plate 200. The first cover plate 100 and the second cover plate 200 of the single battery 00 are both provided with the insulating seal 04 to further enhance the insulation effect.

[0070] In an optional embodiment, the single cell 00 further includes a spacer 05, which is disposed between the cover plate 02 and the second electrical connector 13, through which the pole 14 passes, and which is used to achieve insulation isolation between the cover plate 02 and the pole lug 60. The spacer 05 has a simpler structure and is more convenient to connect.

[0071] In a specific embodiment, Figure 1 As shown, the spacer 05 includes a first spacer 121 and a second spacer 122. The first spacer 121 is arranged between the first cover plate 100 and the third sub-connector 1111, the first pole 700 passes through the first spacer 121, the second spacer 122 is arranged between the second cover plate 200 and the fourth sub-connector 1112, the second pole 800 passes through the second spacer 122, and the spacers 05 are arranged on both sides of the first cover plate 100 and the second cover plate 200 to further enhance the insulation isolation effect between the pole ear 60 and the cover plate 02.

[0072] An optional implementation, such as Figure 1 , Fig.11 , Fig.15 As shown, the single cell 00 also includes at least one explosion-proof valve 06, which is arranged on the shell body 01 or the cover plate 02 to reduce the internal pressure of the single cell 00 to prevent explosion accidents. The setting of the explosion-proof valve 06 makes the connection method simpler.

[0073] In an optional embodiment, the number of explosion-proof valves 06 is two, and the cover plate 02 includes a first cover plate 100 and a second cover plate 200. The first cover plate 100 and the second cover plate 200 respectively close the opposite ends of the shell body 01. The two explosion-proof valves 06 are respectively arranged on the first cover plate 100 and the second cover plate 200. The two explosion-proof valves 06 are staggered. When the two explosion-proof valves 06 are opened at the same time, the staggered arrangement of the two explosion-proof valves 06 can enable the interior of the entire single battery 00 to be flushed by the fire extinguishing medium.

[0074] In a specific embodiment, Figure 1 , Fig.11As shown, the explosion-proof valve 06 includes a first explosion-proof valve 1001 and a second explosion-proof valve 1002. The width of the explosion-proof valve 06 can be 1 / 3 of the width of the cover plate 02, and the length of the explosion-proof valve 06 can be twice the width of the explosion-proof valve 06, which can be specifically set according to the use environment; the distance from the center of the first explosion-proof valve 1001 to the nearest edge of the first cover plate 100 in the length direction can be 100mm to 300mm, and the distance from the center of the second explosion-proof valve 1002 to the nearest edge of the second cover plate 200 in the length direction can be 100mm to 300mm. The center of the first explosion-proof valve 1001 and the center of the second explosion-proof valve 1002 are symmetrically arranged along the center point of the shell 07. The positional relationship setting of the explosion-proof valve 06 in this embodiment can better enable the entire single battery 00 to be flushed by the fire extinguishing medium.

[0075] In a specific embodiment, Figure 1 ,like Fig.15 As shown, the single cell shell body 01 also includes two side covers 03 connected between the first cover plate 100 and the second cover plate 200 and arranged opposite to each other, the two side covers 03 include a first side cover 300 and a second side cover 400, the first explosion-proof valve 1001 is arranged on the first side cover 300, the second explosion-proof valve 1002 is arranged on the second side cover 400, the center of the first explosion-proof valve 1001 can be arranged at the center of the first side cover 300, and the center of the second explosion-proof valve 1002 can be arranged at the center of the second side cover 400; when the explosion-proof valve 06 is arranged on the side cover 03, the first explosion-proof valve 1001 and the second explosion-proof valve 1002 can also be staggered, and the setting method of the explosion-proof valve 06 on the side cover 03 can make the interior of the entire single cell 00 be flushed by the fire extinguishing medium.

[0076] An optional embodiment, at least one connecting hole 08 is provided on the shell body 01 or the cover plate 02, and the connecting hole 08 is provided on one side of the explosion-proof valve 06. The connecting hole 08 is used to connect with an external pipeline to connect the pipeline to the explosion-proof valve 06. The inlet end of the external pipeline is managed by a one-way solenoid valve, and the injection pressure needs to be guaranteed. When thermal runaway occurs inside the single cell 00, the explosion-proof valve 06 is opened and water is immediately injected or a fire extinguishing medium is injected to extinguish the fire. The fire extinguishing agent flushed into the single cell 00 is discharged through the explosion-proof valve 06 at the other end and enters the sewage treatment system through the liquid outlet pipe connected to the single cell 00. The connecting hole 08 can fix the explosion-proof valve 06 with the external pipeline. The connecting hole 08.

[0077] In a specific embodiment, Figure 1 , Fig.11 , Fig.12 , Fig.13 , Fig.15As shown, there are four connecting holes 08, which are arranged around the periphery of the explosion-proof valve 06. The connecting holes 08 include a first connecting hole 1011 and a second connecting hole 1012. Four first connecting holes 1011 are arranged around the first explosion-proof valve 1001, and four second connecting holes 1012 are arranged around the second explosion-proof valve 1002. The two explosion-proof valves 06 are respectively provided with connecting holes 08 around their peripheries so that each explosion-proof valve 06 can be fixedly connected to an external pipeline. The connecting holes 08 make the connection between the external pipeline and the explosion-proof valve 06 more stable.

[0078] In an optional embodiment, at least one injection hole 30 is provided on the shell body 01 or the cover plate 02, and the injection hole 30 is used to inject electrolyte into the single cell 00. At least one injection hole 30 can achieve simultaneous injection on both sides to ensure the injection efficiency and the uniformity of the electrolyte distribution inside the single cell 00.

[0079] In a specific embodiment, Figure 1 , Fig.11 As shown, the number of injection holes 30 is two, and the injection holes 30 include a first injection hole 1031 and a second injection hole 1032. The first cover plate 100 is provided with the first injection hole 1031, and the second cover plate 200 is provided with the second injection hole 1032. The distance from the center of the first injection hole 1031 to the nearest edge in the length direction of the first cover plate 100 can be 100 mm to 300 mm, and the distance from the center of the second injection hole 1032 to the nearest edge in the length direction of the second cover plate 200 can be 100 mm to 300 mm. 0 can better ensure the injection efficiency and the uniformity of the electrolyte distribution inside the battery; the first cover plate 100 is also provided with a first explosion-proof valve 1001, and the second cover plate 200 is also provided with a second explosion-proof valve 1002, the first injection hole 1031 and the first explosion-proof valve 1001 are symmetrically arranged along the positive first pole 700, and the second injection hole 1032 and the second explosion-proof valve 1002 are symmetrically arranged along the second pole 800, ensuring that the injection hole 30 and the explosion-proof valve 06 do not overlap while maximizing the effect of the explosion-proof valve 06 and the injection hole 30.

[0080] In a specific embodiment, Fig.14 , Fig.15As shown, the number of injection holes 30 is four, and the injection holes 30 include a first injection hole 1031, a second injection hole 1032, a third injection hole 1033, and a fourth injection hole 1034. The four injection holes 30 can achieve double-sided simultaneous guarantee of injection efficiency and uniform distribution of electrolyte inside the single cell 00; the first cover plate 100 is provided with a first injection hole 1031 and a second injection hole 1032, and the distance from the center of the first injection hole 1031 to the nearest edge in the length direction of the first cover plate 100 can be 100mm to 300mm, and the distance from the center of the second injection hole 1032 to the nearest edge in the length direction of the first cover plate 100 can be 100mm to 300mm, and the first injection hole 1031 is 100mm to 100mm. The third injection hole 1031 and the second injection hole 1032 are symmetrically arranged along the first pole 700, and the second cover plate 200 is provided with a third injection hole 1033 and a fourth injection hole 1034. The distance from the center of the third injection hole 1033 to the nearest edge of the second cover plate 200 in the length direction can be 100mm to 300mm, and the distance from the center of the fourth injection hole 1034 to the nearest edge of the second cover plate 200 in the length direction can be 100mm to 300mm. The third injection hole 1033 and the fourth injection hole 1034 are symmetrically arranged along the second pole 800. This arrangement of the injection holes 30 can better achieve the simultaneous guarantee of the injection efficiency on both sides and the uniformity of the distribution of the electrolyte inside the single cell 00.

[0081] An optional implementation, such as Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 6As shown, the cover plate 02 includes a first cover plate 100 and a second cover plate 200 that are arranged opposite to each other; a plurality of pole cores 600 are arranged side by side, and the first electrical connector 16 includes a first sub-electrical connector 601 and a second sub-electrical connector 602, and the plurality of first sub-electrical connectors 601 are located between the plurality of pole core bodies 6001 and the first cover plate 100, and the plurality of second sub-electrical connectors 602 are located between the plurality of pole core bodies 6001 and the second cover plate 200; the electrode lead-out member 11 includes a first electrode lead-out member 111 and a second electrode lead-out member 112, and the plurality of first sub-electrical connectors 601 all pass through the second electrical connector 13 of the first electrode lead-out member 111 and are connected to the first electrode lead-out member 111 The second electrical connector 13 is conductively connected to the first electrode lead-out member 111, and the pole 700 of the first electrode lead-out member 111 passes through the first cover plate 100 to lead out the first electrode; multiple second sub-electrical connectors 602 all pass through the second electrical connector 13 of the second electrode lead-out member 112 and are conductively connected to the second electrical connector 13 of the second electrode lead-out member 112, and the pole 800 of the second electrode lead-out member 112 passes through the second cover plate 200 to lead out the second electrode, and the first cover plate 100 and the second cover plate 200 of the single battery 00 are both provided with the electrode lead-out member 111 so that the first electrical connectors 16 at both ends of the pole core 600 can be conductively connected to the electrode lead-out member 111, thereby simplifying the structural design of the single battery 00.

[0082] In addition, each embodiment of the present disclosure further provides a battery device using the single battery, and an electric device using the battery device or the single battery.

[0083] Although example embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above example embodiments are merely exemplary and are not intended to limit the scope of the present application to this. Those of ordinary skill in the art may make various changes and modifications therein without departing from the scope and spirit of the present application. All these changes and modifications are intended to be included within the scope of the present application as required by the appended claims.

[0084] In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present application can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0085] Similarly, it should be understood that in order to streamline the present application and help understand one or more of the various utility model aspects, in the description of the exemplary embodiments of the present application, the various features of the present application are sometimes grouped together into a single embodiment, figure, or description thereof. However, the method of the present application should not be interpreted as reflecting the following intention: the claimed application requires more features than the features explicitly stated in each claim. More specifically, as reflected in the corresponding claims, the inventive point is that the corresponding technical problem can be solved with features that are less than all the features of a single disclosed embodiment. Therefore, the claims following the specific embodiment are hereby explicitly incorporated into the specific embodiment, wherein each claim itself serves as a separate embodiment of the present application.

[0086] It will be understood by those skilled in the art that, except for mutually exclusive features, all features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device disclosed in this specification may be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) may be replaced by an alternative feature that provides the same, equivalent or similar purpose.

[0087] In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0088] It should be noted that the above-mentioned embodiments illustrate rather than limit the invention and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims.

Claims

1. A pole core assembly, characterized in that: include: A plurality of pole cores, wherein the plurality of pole cores are conductively connected to each other; Electrode lead-out piece; The pole core comprises a pole core body and a first electrical connector that are electrically connected. The first electrical connector of at least one pole core passes through the electrode lead-out member and is electrically connected to the electrode lead-out member.

2. The pole core assembly according to claim 1, characterized in that: The electrode lead-out member is provided with a plurality of first through holes, and the plurality of first through holes are arranged in one-to-one correspondence with the plurality of first electrical connectors of the pole cores. The plurality of first electrical connectors of the pole cores respectively pass through the plurality of first through holes and are conductively connected to the electrode lead-out member.

3. The pole core assembly according to claim 2, characterized in that: The pole core assembly also includes an isolation assembly, which is arranged between the plurality of pole core bodies and the electrode lead-out pieces. The isolation assembly is provided with a plurality of second through holes, and the plurality of second through holes are arranged one-to-one corresponding to the plurality of first through holes. The first electrical connectors of the plurality of pole cores respectively pass through the plurality of second through holes and are conductively connected to the electrode lead-out pieces.

4. The pole core assembly according to any one of claims 1 to 3, characterized in that: The first electrical connector includes a pole tab and a pole tab connector, the pole tab is connected to the pole core body, one end of the pole tab connector is conductively connected to the pole tab, and the other end of the pole tab connector passes through the electrode lead-out member and is conductively connected to the electrode lead-out member.

5. The pole core assembly according to any one of claims 1 to 3, characterized in that: The pole core assembly also includes a shell with at least one end open, and the plurality of pole cores are accommodated in the shell.

6. The pole core assembly according to claim 5, characterized in that: At least one partition is arranged in the shell, and the at least one partition divides the shell into a plurality of accommodating grooves, and each of the accommodating grooves accommodates at least one pole core.

7. The pole core assembly according to claim 6, characterized in that: The partition plate and the shell are integrally formed.

8. The pole core assembly according to any one of claims 1 to 3, characterized in that: The electrode lead-out member includes a second electrical connector and a pole, the second electrical connector is conductively connected to the pole, a first electrical connector of at least one pole core passes through the second electrical connector and is conductively connected to the second electrical connector, and the pole is used to lead out the electrode.

9. The pole core assembly according to any one of claims 1 to 3, characterized in that: Multiple pole cores are arranged side by side, the first electrical connector includes a first sub-electrical connector and a second sub-electrical connector, the multiple first sub-electrical connectors are located at the same end of the multiple pole core bodies, and the multiple second sub-electrical connectors are located at the other opposite end of the multiple pole core bodies, the electrode lead-out parts include a first electrode lead-out part and a second electrode lead-out part, the multiple first sub-electrical connectors all pass through the first electrode lead-out part and are conductively connected to the first electrode lead-out part, and the multiple second sub-electrical connectors all pass through the second electrode lead-out part and are conductively connected to the second electrode lead-out part.

10. The pole core assembly according to any one of claims 1 to 3, characterized in that: The first electrical connector of the pole core is welded to the electrode lead-out member.

11. A single cell battery, characterized in that: It comprises a shell body, a cover plate and a pole core assembly according to any one of claims 1 to 10, wherein the pole core assembly is arranged in the shell body and the cover plate closes the shell body.

12. The single cell according to claim 11, characterized in that: The electrode lead-out member includes a second electrical connector and a pole, the second electrical connector is conductively connected to the pole, a first electrical connector of at least one pole core passes through the second electrical connector and is conductively connected to the second electrical connector, and the pole passes through the cover plate for leading the electrode outward.

13. The single cell according to claim 12, characterized in that: The single cell further comprises an insulating seal, which is disposed between the cover plate and the pole, and is used for insulating and connecting the pole and the cover plate.

14. The single cell according to claim 12, characterized in that: The single battery further includes a spacer, which is disposed between the cover plate and the second electrical connector, and the pole passes through the spacer.

15. The single cell according to claim 11, characterized in that: The single battery further includes at least one explosion-proof valve, and the at least one explosion-proof valve is disposed on the shell body or the cover plate.

16. The single cell according to claim 15, characterized in that: There are two explosion-proof valves, and the cover plate includes a first cover plate and a second cover plate. The first cover plate and the second cover plate respectively close the opposite ends of the shell body. The two explosion-proof valves are respectively arranged on the first cover plate and the second cover plate, and the two explosion-proof valves are staggered.

17. The single cell according to claim 15, characterized in that: At least one connecting hole is provided on the shell body or the cover plate. The connecting hole is provided on one side of the explosion-proof valve. The connecting hole is used to connect with an external pipeline so that the pipeline is connected to the explosion-proof valve.

18. The single cell according to claim 11, characterized in that: At least one liquid injection hole is provided on the shell body or the cover plate.

19. The single cell according to claim 12, characterized in that: The cover plate includes a first cover plate and a second cover plate which are arranged opposite to each other; The plurality of pole cores are arranged side by side, the first electrical connector includes a first sub-electrical connector and a second sub-electrical connector, the plurality of the first sub-electrical connectors are located between the plurality of pole core bodies and the first cover plate, and the plurality of the second sub-electrical connectors are located between the plurality of pole core bodies and the second cover plate; The electrode lead-out member includes a first electrode lead-out member and a second electrode lead-out member, a plurality of the first sub-electrical connectors all pass through the second electric connector of the first electrode lead-out member and are conductively connected to the second electric connector of the first electrode lead-out member, and the pole of the first electrode lead-out member passes through the first cover plate to lead out the first electrode; The plurality of second sub-electrical connectors all pass through the second electrical connector of the second electrode lead-out member and are conductively connected to the second electrical connector of the second electrode lead-out member, and the pole of the second electrode lead-out member passes through the second cover plate to lead out the second electrode.

20. A battery pack, characterized in that: It comprises a shell and a single cell arranged in the shell, and the single cell is the single cell according to any one of claims 11-19.

21. An electrical device, characterized in that: The electrical device comprises the battery pack according to claim 20 or the single battery according to any one of claims 11-19.

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