Tab connection structure, pole core assembly, battery, battery pack and electric equipment

Abstract

The invention discloses a tab connecting structure, a pole core assembly, a battery, a battery pack and electric equipment. The tab connecting structure comprises a first connecting piece and a second connecting piece, the tabs of the plurality of pole cores are suitable for being arranged between the first connecting piece and the second connecting piece, and the tabs of the plurality of pole cores are electrically connected between the first connecting piece and the second connecting piece. Through the tab connecting structure, the tabs of the plurality of pole cores are connected in a direct contact manner and are electrically connected through the contact of the first connecting piece and the second connecting piece, so that the contact internal resistance can be reduced, and the heat loss of the electrical connection between the tabs of the plurality of pole cores is reduced; and the stability and the reliability of connection between the tabs of the plurality of pole cores are improved. And the tab connecting structure is simple and small in size, so that the utilization of the internal space of the battery provided with the tab connecting structure can be increased, more electrolyte can be conveniently filled, and the electric capacity is improved.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and in particular to a tab connection structure, a core assembly, a battery, a battery pack, and an electrical device. Background Technology

[0002] In the existing technology, the external drain tabs of two soft-pack battery cells are welded in series by connecting aluminum busbars. This connection method requires cutting the aluminum-plastic film of each soft-pack battery cell into sections, encapsulating each battery cell individually, sealing it with sealant, and then assembling and positioning the two battery cells before welding. The process is complicated and the production yield is low. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of this invention is to provide a tab connection structure that simplifies the manufacturing process and improves the safety of the battery pack.

[0004] A second objective of the present invention is to provide an electrode core assembly, comprising an electrode core and the electrode tab connection structure described in the first aspect embodiment above.

[0005] A third objective of the present invention is to provide a battery comprising the electrode core assembly and housing described in the second aspect embodiment above.

[0006] A fourth object of the present invention is to provide a battery pack comprising the battery described in the third aspect embodiment above.

[0007] A fifth object of the present invention is to provide an electrical device comprising the battery described in the third aspect embodiment above, or the battery pack described in the fourth aspect embodiment above.

[0008] According to a first aspect of the present invention, a tab connection structure includes: a first connector and a second connector, wherein tabs of a plurality of electrode cores are adapted to be disposed between the first connector and the second connector, and the tabs of the plurality of electrode cores are electrically connected between the first connector and the second connector.

[0009] According to the tab connection structure of the present invention, the tabs of multiple electrode cores are directly connected through contact, and electrical connection is achieved through the contact of the first connector and the second connector. This reduces contact resistance, decreases heat loss during electrical connection between the tabs of multiple electrode cores, and improves the stability and reliability of the connection between the tabs of multiple electrode cores. Furthermore, the tab connection structure is simple in structure and small in size, increasing the utilization of the internal space of the battery in which the tab connection structure is installed, facilitating the filling of more electrolyte and increasing capacity.

[0010] In some embodiments, a receiving space is defined between the first connector and the second connector, the receiving space having at least one opening, and the tab is adapted to extend into the receiving space through the opening.

[0011] In some embodiments, there are two openings, which are located on opposite sides of the receiving space, and the tabs of the plurality of electrode cores extend into the receiving space through the two openings.

[0012] In some embodiments, the first connector and the second connector are arranged along the thickness direction of the tab.

[0013] In some embodiments, the tabs of the plurality of electrode cores are stacked along the thickness direction of the tabs.

[0014] In some embodiments, at least one of the first connector and the second connector is provided with at least one positioning member, and at least one of the first connector and the second connector is provided with at least one positioning hole, wherein the positioning member is adapted to pass through the tabs of the plurality of pole cores and engage with the positioning hole.

[0015] In some embodiments, the tab connection structure further includes at least one snap-fit ​​structure, through which the first connector and the second connector are connected.

[0016] In some embodiments, the snap-fit ​​structure includes a slot and a buckle that cooperate with each other. One of the first connector and the second connector is provided with the buckle, and the other of the first connector and the second connector is provided with the slot. The buckle cooperates with the slot.

[0017] In some embodiments, there are multiple snap-fit ​​structures, and the multiple snap-fit ​​structures are respectively disposed at the ends of the first connector and the second connector.

[0018] In some embodiments, the first connector and the second connector are detachably connected.

[0019] According to a second aspect of the present invention, a core assembly includes: a core and a tab connection structure, wherein the core is provided with a tab; the tab connection structure is any one of the tab connection structures described in the first aspect of the present invention, and the tab is disposed between a first connector and a second connector of the tab connection structure.

[0020] In some embodiments, there are multiple pole cores, including a first pole core and a second pole core, wherein the tabs at the adjacent ends of the first pole core and the second pole core are disposed between the first connector and the second connector.

[0021] In some embodiments, the tabs at the ends of the first electrode core and the second electrode core that are adjacent to each other are stacked along the thickness direction of the tabs.

[0022] In some embodiments, the tabs at the adjacent ends of the first and second pole pieces have opposite polarities.

[0023] In some embodiments, the first electrode core and the second electrode core are arranged along the length direction or thickness direction of the electrode core.

[0024] In some embodiments, a through hole is formed on the electrode tab, and the through hole cooperates with the positioning element of the electrode tab connection structure.

[0025] A battery according to a third aspect of the present invention includes: an electrode core assembly and a housing, wherein the electrode core assembly is any one of the electrode core assemblies described in the second aspect of the present invention; the electrode core and the electrode tab connection structure of the electrode core assembly are disposed within the housing.

[0026] In some embodiments, the housing includes an outer resistance layer and a heat-sealing layer, the heat-sealing layer being connected to the side of the outer resistance layer adjacent to the electrode core.

[0027] In some embodiments, the housing further includes a barrier layer connected between the outer barrier layer and the heat-sealing layer.

[0028] In some embodiments, the barrier layer is a fabric-type gel composite thermal insulation layer.

[0029] In some embodiments, the outer barrier layer is an aluminum film layer; and / or the heat-sealing layer is a high-temperature resistant composite film layer.

[0030] In some embodiments, the heat-sealing layer has an adhesive component on the side away from the outer barrier layer.

[0031] The battery pack according to a fourth aspect embodiment of the present invention includes the battery described in any one of the third aspect embodiments above.

[0032] An electrical appliance according to a fifth aspect embodiment of the present invention includes the battery described in any one of the third aspect embodiments above, or the battery pack described in the fourth aspect embodiment above.

[0033] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0034] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of a core assembly according to a second aspect embodiment of the present invention; Figure 2 yes Figure 1 Enlarged schematic diagram of region P in the middle; Figure 3 This is a schematic diagram of a battery according to a third aspect embodiment of the present invention; Figure 4 yes Figure 3 A magnified schematic diagram of the Q region.

[0035] Figure label: 10. First connecting piece; 11. Second connecting piece; 20. Snap-fit ​​structure; 21. Snap-fit ​​slot; 22. Snap-fit ​​buckle; 30. Electrode core assembly; 31. Electrode core; 311. First electrode core; 312. Second electrode core; 32. Electrode tab connection structure; 40. Electrode; 401. Positive electrode; 402. Negative electrode; 100. Battery; 50. Shell; 51. Outer barrier layer; 52. Heat seal layer; 53. Permeation barrier layer; 54. Electrolyte. Detailed Implementation

[0036] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figures 1-4 The tab connection structure 32 according to an embodiment of the present invention includes: a first connector 10 and a second connector 11.

[0037] Specifically, such as Figure 1 As shown, the tabs 40 of the plurality of pole cores 31 are adapted to be disposed between the first connector 10 and the second connector 11, and the tabs 40 of the plurality of pole cores 31 are electrically connected between the first connector 10 and the second connector 11.

[0038] A tab connection structure 32 is disposed between two tabs 40 for connecting the tabs 40 at adjacent ends of two adjacent pole cores 31. For example, the tabs 40 at adjacent ends of two adjacent pole cores 31 are connected by a first connector 10 and a second connector 11. The tab 40 can be disposed between the first connector 10 and the second connector 11, such as by inserting the tab 40 between the first connector 10 and the second connector 11, or by connecting the second connector 11 to the first connector 10 after the tab 40 is disposed on the first connector 10 to form an installation of the tab 40.

[0039] In this embodiment, the first connector 10 and the second connector 11 are metal parts with good electrical conductivity.

[0040] According to the embodiment of the present invention, the tab connection structure 32 enables the tabs 40 of multiple electrode cores 31 to be directly connected, and electrically connected through the contact of the first connector 10 and the second connector 11. This reduces contact resistance, decreases heat loss during electrical connection between the tabs 40 of the multiple electrode cores 31, and improves the stability and reliability of the connection between the tabs 40 of the multiple electrode cores 31. Furthermore, the tab connection structure 32 has a simple structure and small size, which increases the utilization of the internal space of the battery 100 in which the tab connection structure 32 is provided, allowing for the filling of more electrolyte 54 and increasing the capacity.

[0041] According to some embodiments of the present invention, such as Figure 1 As shown, a receiving space is defined between the first connector 10 and the second connector 11, the receiving space having at least one opening, and the tab 40 is adapted to extend into the receiving space through the opening.

[0042] That is, the accommodating space defined between the first connector 10 and the second connector 11 is adapted to the tabs 40 at the adjacent ends of the adjacent pole cores 31. For example, the two pole cores 31 are arranged sequentially along the length direction of the pole cores 31, and the two ends of the pole cores 31 along the length direction are respectively provided with tabs 40. The tab connecting structure 32 is located between the two pole cores 31, with the opening facing the pole cores 31. The tabs 40 at the adjacent ends of the two pole cores 31 extend into the accommodating space from the openings at the corresponding ends to directly contact and achieve electrical connection, or extend into the accommodating space to contact through the tab connecting structure 32 and achieve electrical connection through the tab connecting structure 32.

[0043] Thus, a receiving space is defined between the first connector 10 and the second connector 11. The receiving space has at least one opening, and the tab 40 is adapted to extend into the receiving space through the opening. This facilitates the cooperation between the tab 40 at the adjacent end of the adjacent electrode core 31 and the receiving space between the first connector 10 and the second connector 11. At the same time, the receiving space can be adjusted and optimized according to actual needs to meet the battery pack connection requirements of different specifications and requirements, thereby improving the versatility of the tab connection structure 32.

[0044] According to some embodiments of the present invention, there are two openings, which are located on opposite sides of the receiving space, and the tabs 40 of the plurality of pole cores 31 extend into the receiving space through the two openings respectively.

[0045] That is, along the arrangement direction of the pole cores 31, for example, taking the arrangement along the length direction of the pole cores 31 as an example, the tab connecting structure 32 is disposed between the two pole cores 31. The tab connecting structure 32 forms an opening in the direction facing the two pole cores 31, and the two openings may be connected or not connected. In this embodiment, the two openings are connected. The tabs 40 disposed at the adjacent ends of the two pole cores 31 are respectively inserted into the receiving space from the openings at the corresponding ends.

[0046] Thus, the two openings are located on opposite sides of the receiving space, and the tabs 40 of the multiple pole cores 31 extend into the receiving space through the two openings, providing guidance for the tabs 40 of adjacent pole cores 31 to cooperate with the tab connection structure 32, so as to realize the connection between the multiple pole cores 31 and improve the reliability of the connection between the tabs 40 of the multiple pole cores 31.

[0047] According to some embodiments of the present invention, such as Figure 2 As shown, the first connector 10 and the second connector 11 are arranged along the thickness direction of the tab 40.

[0048] That is, the first connector 10 and the second connector 11 are arranged along the thickness direction of the tab 40, which is also the thickness direction of the electrode core 31, and the tabs 40 of two adjacent electrode cores 31, which are arranged at one end close to each other, are sandwiched between the first connector 10 and the second connector 11. In this embodiment, the first connector 10 is located above the second connector 11.

[0049] Therefore, the first connector 10 and the second connector 11 are arranged along the thickness direction of the tab 40, which can facilitate shortening the distance between adjacent pole cores 31, thereby shortening the size of the tab 40 at the end of the adjacent pole cores 31 that is close to each other, reducing the heat loss generated by the current transfer between the tabs 40 of multiple pole cores 31, and at the same time, saving the cost of the tab 40 and making full use of the space.

[0050] According to some embodiments of the present invention, such as Figure 2 As shown, the tabs 40 of multiple pole cores 31 are stacked along the thickness direction of the tabs 40.

[0051] That is, the tabs 40 at the ends of adjacent pole cores 31 that are close to each other cooperate with the receiving space through the two openings of the tab connection structure 32, and the tabs 40 at the ends of adjacent pole cores 31 that are close to each other are in direct contact along the thickness direction of the tabs 40.

[0052] Therefore, by stacking the tabs 40 of multiple electrode cores 31 along the thickness direction of the tabs 40, the length of the tabs 40 can be significantly shortened, reducing the space occupied. At the same time, the tabs 40 of multiple electrode cores 31 can be in direct contact along the thickness direction of the tabs 40. Compared with the traditional welding connection method, this can reduce the contact resistance of the tabs 40 and improve the stability of the connection.

[0053] According to some embodiments of the present invention, at least one of the first connector 10 and the second connector 11 is provided with at least one positioning member, and at least the other of the first connector 10 and the second connector 11 is provided with at least one positioning hole. The positioning member is adapted to pass through the tabs 40 of the plurality of pole cores 31 and engage with the positioning hole.

[0054] For example, the first connector 10 is provided with a positioning element, which is located on the side surface of the first connector 10 adjacent to the second connector 11. The second connector 11 is provided with a positioning hole, and the positioning hole and the positioning element are opposite each other along the thickness direction of the tab 40. The positioning element passes through the tab 40 and can cooperate with the positioning hole. In this embodiment, the first connector 10 and the second connector 11 are respectively provided with a positioning element and a positioning hole. The positioning element on the first connector 10 cooperates with the positioning hole on the second connector 11, and the positioning hole on the first connector 10 cooperates with the positioning element on the second connector 11. The arrangement of multiple positioning elements and positioning holes facilitates the stability of the tab 40 inside the tab connection structure 32 and increases the reliability of the connection.

[0055] Therefore, at least one of the first connector 10 and the second connector 11 is provided with at least one positioning element, and at least the other of the first connector 10 and the second connector 11 is provided with at least one positioning hole. This can improve the connection strength between the two tabs 40 at the adjacent ends of the adjacent pole cores 31, prevent the tabs 40 at the adjacent ends of the two adjacent pole cores 31 from separating, improve the reliability of the tab connection structure 32, and improve the connection efficiency due to the simple connection method.

[0056] According to some embodiments of the present invention, such as Figure 2 As shown, the tab connection structure 32 further includes at least one snap-fit ​​structure 20, through which the first connector 10 and the second connector 11 are connected.

[0057] That is, at least one snap-fit ​​structure 20 is provided at the connection between the first connector 10 and the second connector 11. The snap-fit ​​structure 20 in the tab connection structure 32 is suitable for connecting the first connector 10 and the second connector 11. Thus, the tab connection structure 32 also includes at least one snap-fit ​​structure 20. The first connector 10 and the second connector 11 are connected by the snap-fit ​​structure 20, which can improve the connection strength between the first connector 10 and the second connector 11 and improve the reliability and stability of the tab connection structure 32.

[0058] According to some embodiments of the present invention, such as Figure 2As shown, the snap-fit ​​structure 20 includes a slot 21 and a buckle 22 that cooperate with each other. One of the first connector 10 and the second connector 11 is provided with a buckle 22, and the other of the first connector 10 and the second connector 11 is provided with a slot 21. The buckle 22 cooperates with the slot 21.

[0059] For example, the first connector 10 is provided with a buckle 22, and the second connector 11 is provided with a slot 21. The buckle 22 and the slot 21 correspond to each other along the thickness direction of the tab 40, and the buckle 22 on the first connector 10 is adapted to cooperate with the slot 21 on the second connector 11. In this embodiment, the buckle 22 on the first connector 10 and the first connector 10, and the slot 21 on the second connector 11 and the second connector 11 are all integrally formed.

[0060] Therefore, one of the first connector 10 and the second connector 11 is provided with a buckle 22, and the other of the first connector 10 and the second connector 11 is provided with a slot 21. The buckle 22 and the slot 21 cooperate to prevent the first connector 10 and the second connector 11 from separating relative to each other, improve the guiding effect for the connection of the first connector 10 and the second connector 11, and further improve the reliability and stability of the tab connection structure 32, and prevent the first connector 10 and the second connector 11 from being twisted relative to each other.

[0061] According to some embodiments of the present invention, such as Figure 2 As shown, there are multiple snap-fit ​​structures 20, which are respectively located at the ends of the first connector 10 and the second connector 11.

[0062] In this embodiment, the tab connection structure 32 includes two snap-fit ​​structures 20, which are respectively disposed at both ends of the first connector 10 and the second connector 11 along the length direction of the tab 40. That is, snap-fit ​​structures 20 are provided at both ends of the tab connection structure 32 in the width direction of the electrode core 31. The snap-fit ​​structures 20 at the ends can avoid interference between the tab 40 of the electrode core 31 and the tab connection structure 32, and at the same time ensure that the tab connection structure 32 is subjected to balanced force so that the tabs 40 of two adjacent electrode cores 31 are in closer contact.

[0063] Therefore, multiple snap-fit ​​structures 20 are respectively provided at the ends of the first connector 10 and the second connector 11, which can improve the connection strength of the first connector 10 and the second connector 11 along the thickness direction of the tab 40 and along the length direction of the tab 40, improve the structural strength of the tab connection structure 32, and extend the service life of the tab connection structure 32.

[0064] According to some embodiments of the present invention, such as Figure 2 As shown, the first connector 10 and the second connector 11 are detachably connected.

[0065] That is, the first connector 10 and the second connector 11 can be detachably connected along the thickness direction of the tab 40 by the separable engagement of the buckle 22 on the first connector 10 and the slot 21 on the second connector 11.

[0066] Therefore, the first connector 10 and the second connector 11 are detachably connected, which allows the first connector 10 and the second connector 11 to be disassembled and assembled without tools, simplifying the assembly and disassembly steps of the first connector 10 and the second connector 11, improving the efficiency of the assembly and disassembly of the first connector 10 and the second connector 11, facilitating the connection with the tab 40, reducing assembly costs while improving assembly strength.

[0067] According to a second aspect embodiment of the present invention, the core assembly 30, such as Figure 1 and Figure 2 As shown, the electrode core assembly 30 includes: an electrode core 31 and an electrode tab connection structure 32. The electrode core 31 is provided with an electrode tab 40. The electrode tab connection structure 32 is any of the electrode tab connection structures 32 in the first aspect embodiment above. The electrode tab 40 is disposed between the first connector 10 and the second connector 11 of the electrode tab connection structure 32.

[0068] That is, the tab connection structures 32 are respectively disposed at at least one end of the pole core 31 along the length direction of the pole core 31, and the tabs 40 disposed at the adjacent ends of two adjacent pole cores 31 are located within the receiving space of the tab connection structure 32. In this embodiment, the tabs 40 are disposed at both ends of the pole core 31 along the length direction, and part of the tabs 40 are located inside the pole core 31, while part of the tabs 40 protrudes from the pole core 31 for connection with the tab connection structure 32.

[0069] Therefore, the tab 40 is located between the first connector 10 and the second connector 11 of the tab connection structure 32, so that both ends of the pole core 31 along the length direction of the pole core 31 can be connected in series with other pole cores 31 through the tab connection structure 32, thereby optimizing the design of the pole core assembly 30, simplifying the manufacturing process of the pole core assembly 30, and reducing manufacturing costs.

[0070] According to some embodiments of the present invention, such as Figure 2 As shown, there are multiple pole cores 31, including a first pole core 311 and a second pole core 312. The pole tabs 40 at the ends of the first pole core 311 and the second pole core 312 that are adjacent to each other are located between the first connector 10 and the second connector 11.

[0071] That is, the first electrode core 311 and the second electrode core 312 are spaced apart along the length direction of the electrode core 31, and the tabs 40 at the ends of the first electrode core 311 and the second electrode core 312 that are adjacent to each other along the length direction of the electrode core 31 are connected by the first connector 10 and the second connector 11. Specifically, the tabs 40 at the ends of the first electrode core 311 and the second electrode core 312 that are adjacent to each other can be placed on one of the first connector 10 and the second connector 11, and then the other of the first connector 10 and the second connector 11 can be closed to fix and limit the tabs 40.

[0072] Therefore, the tabs 40 at the ends of the first electrode core 311 and the second electrode core 312 that are adjacent to each other are located between the first connector 10 and the second connector 11, so that the first electrode core 311 and the second electrode core 312 are connected in series through the tab connection structure 32, saving space inside the battery 100 and improving the output power of the battery 100 and the reliability of the electrode core assembly 30.

[0073] According to some embodiments of the present invention, such as Figure 2 As shown, the tabs 40 at the ends of the first pole core 311 and the second pole core 312 that are adjacent to each other are stacked along the thickness direction of the tabs 40.

[0074] That is, the tabs 40 of the first pole core 311 and the second pole core 312 at their adjacent ends along the length direction of the pole core 31 are overlapped along the thickness direction of the tabs 40. In this embodiment, the first pole core 311 and the second pole core 312 are arranged along the thickness direction of the tabs 40, and the tabs 40 at the same adjacent ends of the first pole core 311 and the second pole core 312 are stacked along the thickness direction of the tabs 40. The tab connecting structure 32 is provided at one end of the tabs 40 that the first pole core 311 and the second pole core 312 need to be connected. In this embodiment, for the first pole core 311 and the second pole core 312 that are stacked along the thickness direction of the pole core 31, the two tabs 40 located at the same end can be connected to the tab connecting structure 32 by extending into the tab connecting structure 32 through one opening, or they can be accommodated by extending into the tab connecting structure 32 through two opposite openings. At this time, the first connector 10 and the second connector 11 of the tab connecting structure 32 are distributed along the length direction of the pole core 31. Therefore, by stacking the tabs 40 at the adjacent ends of the first electrode core 311 and the second electrode core 312 along the thickness direction of the tabs 40, the distance between the first electrode core 311 and the second electrode core 312 can be shortened, as can the distance between the positive electrode tab 401 and the negative electrode tab 402. At the same time, the structural strength of the electrode core assembly 30 is improved, further enhancing its reliability and stability. Furthermore, it facilitates a "serpentine" connection between multiple electrode cores 31.

[0075] According to some embodiments of the present invention, such as Figure 2 As shown, the polarities of the tabs 40 at the adjacent ends of the first pole core 311 and the second pole core 312 are opposite.

[0076] Both ends of the first electrode core 311 and the second electrode core 312 along the length direction of the electrode core 31 are provided with tabs 40. The tabs 40 include positive tabs 401 and negative tabs 402, that is, positive tabs 401 and negative tabs 402 are respectively provided at both ends of the first electrode core 311 and the second electrode core 312. In this embodiment, the polarities of the tabs 40 at the adjacent ends of the first electrode core 311 and the second electrode core 312 are opposite. For example, the positive tab 401 of the first electrode core 311 and the negative tab 402 of the second electrode core 312 are connected by a tab connecting structure 32. The positive tab 401 of the first electrode core 311 and the negative tab 402 of the second electrode core 312 are stacked in the receiving space of the tab connecting structure 32.

[0077] Therefore, the polarities of the tabs 40 at the adjacent ends of the first pole core 311 and the second pole core 312 are opposite, which facilitates the series connection between the first pole core 311 and the second pole core 312, improves the connection efficiency between the first pole core 311 and the second pole core 312, simplifies the processing technology of the pole core assembly 30, avoids short circuits between the first pole core 311 and the second pole core 312, and improves the safety and reliability of the pole core assembly 30.

[0078] According to some embodiments of the present invention, such as Figure 2 As shown, the first pole core 311 and the second pole core 312 are arranged along the length or thickness direction of the pole core 31.

[0079] In this embodiment, the first electrode core 311 and the second electrode core 312 are spaced apart along the length direction of the electrode core 31, and the positive electrode tab 401 of the first electrode core 311 and the negative electrode tab 402 of the second electrode core 312 are stacked along the thickness direction of the tab 40.

[0080] Optionally, the first electrode core 311 and the second electrode core 312 can be arranged correspondingly along the thickness direction of the electrode core 31, and the negative electrode tab 402 of the first electrode core 311 and the positive electrode tab 401 of the second electrode core 312 are stacked along the thickness direction of the tab 40, and the positive electrode tab 401 of the second electrode core 312 and the negative electrode tab 402 of the first electrode core 311 are stacked along the thickness direction of the tab 40.

[0081] That is, in this embodiment, the first electrode core 311 and the second electrode core 312 are arranged along the length direction of the electrode core 31 and along the thickness direction of the electrode core 31. Adjacent first electrode cores 311 and second electrode cores 312 are connected by a tab connection structure 32. Multiple first electrode cores 311 and second electrode cores 312 are arranged in a "snake-like" connection inside the casing 50 of the battery 100.

[0082] Therefore, the first electrode core 311 and the second electrode core 312 are arranged along the length or thickness direction of the electrode core 31, which optimizes the arrangement of the first electrode core 311 and the second electrode core 312. The first electrode core 311 and the second electrode core 312 are connected in series through the stacking of the positive electrode tab 401 and the negative electrode tab 402 and the setting of the tab connection structure 32, which effectively improves the working efficiency and energy density of the electrode core assembly 30.

[0083] According to some embodiments of the present invention, a through hole is formed on the tab 40, and the through hole cooperates with the positioning element of the tab connection structure 32.

[0084] In this embodiment, taking the positive electrode tab 401 on the first electrode core 311 as an example, a through hole is formed on the side of the positive electrode tab 401 away from the first electrode core 311. The through hole corresponds to and cooperates with the positioning member of the electrode tab connecting structure 32. Thus, the through hole formed on the electrode tab 40, which cooperates with the positioning member of the electrode tab connecting structure 32, can improve the connection strength between the electrode tab 40 and the electrode tab connecting structure 32, and at the same time improve the structural strength of the electrode tab 40.

[0085] According to a third aspect embodiment of the present invention, the battery 100, such as Figure 3 As shown, it includes: a core assembly 30 and a housing 50, wherein the core assembly 30 is any one of the core 30 in the second aspect embodiment described above; the core 31 and the tab connection structure 32 of the core assembly 30 are disposed inside the housing 50.

[0086] That is, the electrode core 31 of the electrode core assembly 30 and the tab connection structures 32 located at both ends of the electrode core 31 along its length direction cooperate with the housing 50. Therefore, by having the electrode core 31 and the tab connection structures 32 of the electrode core assembly 30 located inside the housing 50, the electrode core 31 and the tab connection structures 32 can be prevented from being scratched by external structural components. At the same time, this improves the stability and safety of the electrode core 31, extends its service life, and enhances the reliability of the battery 100.

[0087] According to some embodiments of the present invention, such as Figure 4 As shown, the housing 50 includes: an outer resistance layer 51 and a heat-sealing layer 52. The heat-sealing layer 52 is connected to the side of the outer resistance layer 51 adjacent to the electrode core 31, and the outer resistance layer 51 is an aluminum film layer; and / or the heat-sealing layer 52 is a high-temperature resistant composite film layer, and an adhesive is provided on the side of the heat-sealing layer 52 away from the outer resistance layer 51.

[0088] In this embodiment, a heat-sealing layer 52 is disposed between the electrode core 31 and the outer resistance layer 51. The outer resistance layer 51 is an aluminum film layer used to protect the electrode core 31 from scratches and reduce damage to the battery 100 from external factors. The heat-sealing layer 52 is a high-temperature resistant composite film layer, and an adhesive is provided on the side of the heat-sealing layer 52 away from the outer resistance layer 51. The heat-sealing layer 52 is used to seal and bond the electrode core 31 and to bond and fix the internal materials. Thus, the heat-sealing layer 52 is connected to the side of the outer resistance layer 51 adjacent to the electrode core 31, which can isolate heat, improve the structural strength of the casing 50, facilitate folding and packaging, improve heat insulation, and prevent the electrode core 31 from being affected by high temperature, thus improving the reliability of the battery 100.

[0089] According to some embodiments of the present invention, such as Figure 4 As shown, the housing 50 also includes a barrier layer 53, which is connected between the outer barrier layer 51 and the heat-sealing layer 52, and the barrier layer 53 is a fabric-type gel composite heat insulation layer.

[0090] That is, the barrier layer 53 is disposed between the outer barrier layer 51 and the heat sealing layer 52, which is suitable for improving the stability of the battery 100. In this embodiment, the barrier layer 53 is a fabric-type gel composite heat insulation layer, which has good heat insulation and thermal stability. It can prevent external substances such as oxygen and moisture from entering the interior of the electrode core 31, ensuring the stability of material exchange inside the electrode core 31, effectively improving the stability and safety of the battery 100, and extending the service life of the battery 100.

[0091] In this embodiment, the electrode core 31 is disposed inside the housing 50, and the electrode core 31 adopts an all-solid electrolyte 54. The tabs 40 between two adjacent electrode cores 31 are stacked in the tab connection structure 32, which reduces the space occupied in the housing 50. The connection space between two adjacent electrode cores 31 can be completely filled with solid electrolyte 54, which effectively improves the energy density of the battery 100 and improves the working efficiency of the battery 100.

[0092] The battery pack according to a fourth aspect embodiment of the present invention includes the battery 100 of any one of the third aspect embodiments described above.

[0093] According to a fifth aspect embodiment of the present invention, the electrical device includes the battery 100 of any one of the third aspect embodiments described above, or the battery pack of the fourth aspect embodiments described above.

[0094] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0095] In the description of this invention, "first feature" and "second feature" may include one or more of the features. In the description of this invention, "a plurality of" means two or more. In the description of this invention, "above" or "below" the second feature may include direct contact between the first and second features, or it may include contact between the first and second features not being in direct contact but through another feature between them. In the description of this invention, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0096] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0097] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A tab connection structure (32), characterized in that, include: First connector (10); The second connector (11) has tabs (40) of a plurality of pole cores (31) adapted to be disposed between the first connector (10) and the second connector (11), wherein the tabs (40) of the plurality of pole cores (31) are electrically connected between the first connector (10) and the second connector (11).

2. The electrode connection structure (32) according to claim 1, characterized in that, A receiving space is defined between the first connector (10) and the second connector (11), the receiving space having at least one opening, and the tab (40) is adapted to extend into the receiving space through the opening.

3. The electrode connection structure (32) according to claim 2, characterized in that, There are two openings, which are located on opposite sides of the receiving space. The tabs (40) of the plurality of pole cores (31) extend into the receiving space through the two openings.

4. The electrode connection structure (32) according to claim 1, characterized in that, The first connector (10) and the second connector (11) are arranged along the thickness direction of the tab (40).

5. The electrode connection structure (32) according to claim 1, characterized in that, The tabs (40) of the plurality of said pole cores (31) are stacked along the thickness direction of the tabs (40).

6. The electrode connection structure (32) according to claim 5, characterized in that, At least one of the first connector (10) and the second connector (11) is provided with at least one positioning member, and at least one of the first connector (10) and the second connector (11) is provided with at least one positioning hole, the positioning member being adapted to cooperate with the positioning hole through the tabs (40) of the plurality of pole cores (31).

7. The electrode connection structure (32) according to claim 1, characterized in that, Also includes: At least one snap-fit ​​structure (20) is provided, through which the first connector (10) and the second connector (11) are connected.

8. The electrode connection structure (32) according to claim 7, characterized in that, The snap-fit ​​structure (20) includes a slot (21) and a buckle (22) that cooperate with each other. One of the first connector (10) and the second connector (11) is provided with the buckle (22), and the other of the first connector (10) and the second connector (11) is provided with the slot (21), and the buckle (22) cooperates with the slot (21).

9. The electrode connection structure (32) according to claim 7, characterized in that, There are multiple snap-fit ​​structures (20), and the multiple snap-fit ​​structures (20) are respectively disposed at the ends of the first connector (10) and the second connector (11).

10. The electrode connection structure (32) according to any one of claims 1-9, characterized in that, The first connector (10) and the second connector (11) are detachably connected.

11. A core assembly (30), characterized in that, include: The electrode core (31) is provided with electrode tabs (40). The electrode connection structure (32) is the electrode connection structure (32) according to any one of claims 1-10, and the electrode (40) is disposed between the first connector (10) and the second connector (11) of the electrode connection structure (32).

12. The electrode core assembly (30) according to claim 11, characterized in that, The electrode core (31) is multiple, and the multiple electrode cores (31) include: First pole core (311); The second pole core (312) has a tab (40) at one end of the first pole core (311) and the second pole core (312) adjacent to each other, located between the first connector (10) and the second connector (11).

13. The electrode core assembly (30) according to claim 12, characterized in that, The tabs (40) at the ends of the first electrode core (311) and the second electrode core (312) adjacent to each other are stacked along the thickness direction of the tabs (40).

14. The electrode core assembly (30) according to claim 12, characterized in that, The tabs (40) at the adjacent ends of the first pole core (311) and the second pole core (312) have opposite polarities.

15. The electrode core assembly (30) according to claim 12, characterized in that, The first pole core (311) and the second pole core (312) are arranged along the length or thickness direction of the pole core (31).

16. The electrode core assembly (30) according to claim 11, characterized in that, A through hole is formed on the tab (40), and the through hole cooperates with the positioning element of the tab connection structure (32).

17. A battery (100), characterized in that, include: The core assembly (30) is the core assembly (30) according to any one of claims 11-16. The housing (50) contains the pole core (31) and the tab connection structure (32) of the pole core assembly (30).

18. The battery (100) according to claim 17, characterized in that, The housing (50) includes: External barrier layer (51); A heat-sealing layer (52) is attached to the side of the outer resistance layer (51) adjacent to the electrode core (31).

19. The battery (100) according to claim 18, characterized in that, The housing (50) further includes: A barrier layer (53) is connected between the outer barrier layer (51) and the heat-sealing layer (52).

20. The battery (100) according to claim 19, characterized in that, The barrier layer (53) is a fabric-type gel composite heat insulation layer.

21. The battery (100) according to claim 18, characterized in that, The outer resistive layer (51) is an aluminum film layer; and / or, The heat-sealing layer (52) is a high-temperature resistant composite film layer.

22. The battery (100) according to claim 18, characterized in that, An adhesive is provided on the side of the heat-sealing layer (52) away from the outer barrier layer (51).

23. A battery pack, characterized in that, Includes the battery (100) according to any one of claims 17-22.

24. An electrical appliance, characterized in that, Includes the battery (100) according to any one of claims 17-22, or the battery pack according to claim 23.

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