Inner core assembly, battery monomer and battery pack
By using elastic insulating sleeves to cover the tabs in the battery core assembly, the problems of short circuits and tearing caused by exposed tabs are solved, improving the safety and stability of the battery assembly and adapting it to diverse electrical environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-25
- Publication Date
- 2026-03-17
AI Technical Summary
Exposed tabs pose a risk of short circuits or tearing, affecting the safety and stability of the battery assembly.
It adopts an inner core component design, including an inner core and an elastic insulating component. The positive and negative electrodes are covered by an insulating sleeve to prevent them from being exposed, and to provide cushioning protection under external force to prevent bending and tearing.
It improves the safety and stability of the core components, reduces the risk of short circuits, enhances electrical performance and reliability, and adapts to the diverse needs of different electrical environments.
Smart Images
Figure CN224006103U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of battery technology, specifically relating to an internal core component, a battery cell, and a battery pack. Background Technology
[0002] The tabs are the positive and negative terminals of a battery cell, used to connect the inner electrode plates of the battery cell to the external circuit, serving to conduct electricity, fix the electrode plates, and prevent short circuits.
[0003] In traditional structures, the tabs are usually welded to the connecting piece or the base of the electrode post, leaving the tabs exposed and at risk of short circuits or tearing. Utility Model Content
[0004] The purpose of this application is to provide an internal core assembly to solve the problem of exposed tabs posing a risk of short circuits or tearing; this application also provides a single battery cell; this application also provides a battery pack.
[0005] Technical solution: This application provides an inner core component, including:
[0006] The inner core includes a body, a positive electrode tab, and a negative electrode tab. The body has an end face, and the positive electrode tab and the negative electrode tab are disposed on the end face.
[0007] An elastic insulating component includes an insulating body, a first insulating sleeve, and a second insulating sleeve. The first insulating sleeve is fitted onto the positive electrode tab, and the second insulating sleeve is fitted onto the negative electrode tab. The insulating body connects the first insulating sleeve and the second insulating sleeve and covers the end face.
[0008] In some embodiments, it also includes:
[0009] A plurality of inner cores, wherein the bodies of the plurality of inner cores are arranged along the thickness direction of the inner cores, and the end faces of the plurality of inner cores are arranged on the same side;
[0010] The insulating body covers multiple end faces, the first insulating sleeve is sleeved on multiple positive tabs, and the second insulating sleeve is sleeved on multiple negative tabs.
[0011] In some embodiments, the number of elastic insulating components is multiple, the insulating body covers at least one end face, the first insulating sleeve is sleeved on at least one positive electrode tab, and the second insulating sleeve is sleeved on at least one negative electrode tab.
[0012] In some embodiments, the inner wall of the first insulating sleeve abuts against the surface of the positive electrode tab, and the inner wall of the second insulating sleeve abuts against the surface of the negative electrode tab.
[0013] In some embodiments, the insulating body has a receiving groove on one side facing the end face, and one end of the body near the end face is disposed in the receiving groove and abuts against the inner wall of the receiving groove.
[0014] In some embodiments, the inner core includes:
[0015] A first inner core, the first inner core including a first body, a first positive electrode tab and a first negative electrode tab, the first body having a first end face, the first positive electrode tab and the first negative electrode tab being disposed on the first end face;
[0016] The second inner core includes a second body, a second positive electrode tab, and a second negative electrode tab. The second body has a second end face, and the second positive electrode tab and the second negative electrode tab are disposed on the second end face.
[0017] Along the length of the inner core, the first end face and the second end face are disposed on opposite sides;
[0018] The two elastic insulating components have two insulating bodies that respectively cover the first end face and the second end face, two first insulating sleeves that are respectively fitted onto the first positive electrode ear and the second positive electrode ear, and two second insulating sleeves that are respectively fitted onto the first negative electrode ear and the second negative electrode ear.
[0019] In some embodiments, there are multiple first inner cores and multiple second inner cores. Two insulating bodies respectively cover multiple first end faces and multiple second end faces. Two first insulating sleeves are respectively sleeved on multiple first positive tabs and multiple second positive tabs. Two second insulating sleeves are respectively sleeved on multiple first negative tabs and multiple second negative tabs.
[0020] In some embodiments, the number of elastic insulating components is multiple, the insulating body covers at least one first end face or at least one second end face, the first insulating sleeve is sleeved on at least one first positive electrode tab or at least one second positive electrode tab, and the second insulating sleeve is sleeved on at least one first negative electrode tab or at least one second negative electrode tab.
[0021] In some embodiments, the elastic insulation component is a polypropylene component or a polyethylene terephthalate component.
[0022] Accordingly, this application also provides a single battery cell, comprising:
[0023] A housing having a receiving space;
[0024] The inner core assembly as described above is disposed within the receiving space.
[0025] Accordingly, this application also provides a battery pack, including:
[0026] Multiple battery cells as described above;
[0027] A connecting piece, which is connected to the positive or negative tab of the core assembly in the battery cell.
[0028] Beneficial Effects: Compared with the prior art, the core assembly provided in this application includes: an inner core, comprising a body, a positive electrode tab, and a negative electrode tab; the body has an end face, and the positive and negative electrode tabs are disposed on the end face; and an elastic insulating assembly, comprising an insulating body, a first insulating sleeve, and a second insulating sleeve; the first insulating sleeve is disposed on the positive electrode tab, and the second insulating sleeve is disposed on the negative electrode tab; the insulating body connects the first and second insulating sleeves and covers the end face. Thus, this application uses the first and second insulating sleeves to cover the positive and negative electrode tabs, preventing exposure of the positive and negative electrode tabs and preventing tearing at the root when the positive and negative electrode tabs are subjected to external force, thereby improving the safety of the core assembly.
[0029] It is understood that, compared with the prior art, the battery cell provided in this application embodiment includes all the technical features and technical effects of the above-mentioned core components, which will not be repeated here.
[0030] It is understood that, compared with the prior art, the battery pack provided in this application embodiment includes all the technical features and technical effects of the above-mentioned battery cells, which will not be repeated here. Attached Figure Description
[0031] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0032] Figure 1 This is a first structural schematic diagram of the core assembly provided in an embodiment of this application;
[0033] Figure 2 This is a first exploded structural diagram of the core assembly provided in an embodiment of this application;
[0034] Figure 3 This is a schematic diagram of the structure of the elastic insulation component in the core assembly provided in the embodiments of this application;
[0035] Figure 4 This is a schematic diagram of the second structure of the core assembly provided in an embodiment of this application;
[0036] Figure 5This is a schematic diagram of the second exploded structure of the core assembly provided in an embodiment of this application.
[0037] Reference numerals: 10-Inner core; 11-Body body; 111-End face; 12-Positive electrode tab; 13-Negative electrode tab; 14-First inner core; 141-First body body; 142-First positive electrode tab; 143-First negative electrode tab; 144-First end face; 15-Second inner core; 151-Second body body; 152-Second positive electrode tab; 153-Second negative electrode tab; 154-Second end face; 20-Elastic insulating component; 21-Insulating body; 211-Receiving groove; 22-First insulating sleeve; 23-Second insulating sleeve; X-Thickness direction; Y-Length direction. Detailed Implementation
[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.
[0039] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. In the description of this application, unless otherwise stated, "multiple" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.
[0040] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of exemplary embodiments and may not be to scale. The modules or processes shown in the drawings are not necessarily essential for implementing this application and therefore should not be used to limit the scope of protection of this application.
[0041] Please see Figure 1 and Figure 2 , Figure 1This is a first structural schematic diagram of the core assembly provided in an embodiment of this application; Figure 2 This is a first exploded structural diagram of the core assembly provided in an embodiment of this application. This application provides an core assembly, including an inner core 10 and an elastic insulating assembly 20. The inner core 10 includes a body 11, a positive electrode 12, and a negative electrode 13. The body 11 has an end face 111, and the positive electrode 12 and negative electrode 13 are disposed on the end face 111. The elastic insulating assembly 20 includes an insulating body 21, a first insulating sleeve 22, and a second insulating sleeve 23. The first insulating sleeve 22 is sleeved on the positive electrode 12, and the second insulating sleeve 23 is sleeved on the negative electrode 13. The insulating body 21 connects the first insulating sleeve 22 and the second insulating sleeve 23 and covers the end face 111. Specifically, this application effectively prevents the positive electrode 12 and the negative electrode 13 from being exposed through the first insulating sleeve 22 and the second insulating sleeve 23, preventing metal particles from falling into the body 11 and causing a short circuit, thereby ensuring the stable electrical performance of the core assembly. Meanwhile, the first insulating sleeve 22 and the second insulating sleeve 23 can also increase the creepage clearance between the positive electrode tab 12 and the negative electrode tab 13, reducing the risk of short circuit. When the inner core assembly is subjected to external pressure or vibration, the elastic insulating component 20 can buffer the impact through its own elasticity, thereby preventing the roots of the positive electrode tab 12 and the negative electrode tab 13 from bending and tearing.
[0042] Please refer to it again. Figure 1 and Figure 2 In some embodiments, the inner core assembly further includes a plurality of inner cores 10. The bodies 11 of the plurality of inner cores 10 are arranged along the thickness direction X of the inner core 10, and the end faces 111 of the plurality of inner cores 10 are arranged on the same side. An insulating body 21 covers the plurality of end faces 111, a first insulating sleeve 22 is fitted onto the plurality of positive tabs 12, and a second insulating sleeve 23 is fitted onto the plurality of negative tabs 13. Specifically, when the inner core assembly has a large capacity requirement, this application can provide a plurality of inner cores 10 to meet the requirement. Based on this, by covering the plurality of end faces 111 with the insulating body 21, fitting the first insulating sleeve 22 onto the plurality of positive tabs 12, and fitting the second insulating sleeve 23 onto the plurality of negative tabs 13, the plurality of inner cores 10 are integrated into a tight whole, reducing the displacement and shaking that may occur when each inner core 10 exists individually, and enhancing the stability and reliability of the inner core assembly. In this way, the elastic insulation component 20 can provide comprehensive and uniform insulation protection for multiple positive tabs 12, negative tabs 13 and end faces 111 of multiple inner cores 10 at the same time, ensuring the normal operation of the inner core components.
[0043] In some embodiments, there are multiple elastic insulating components 20, with an insulating body 21 covering at least one end face 111, a first insulating sleeve 22 fitted onto at least one positive electrode tab 12, and a second insulating sleeve 23 fitted onto at least one negative electrode tab 13. Thus, this application allows for flexible adjustment of the combination of the inner cores 10 according to the placement space of the inner core components to meet diverse power and voltage requirements. Especially for inner cores 10 placed in critical positions, individual elastic insulating components 20 can be used to specifically enhance the insulation and elastic protection of those inner cores 10. Furthermore, if a problem occurs with one elastic insulating component 20, that component can be inspected and replaced to avoid affecting the inner core 10 protected by other elastic insulating components 20. This reduces maintenance costs and improves the maintainability of the inner core components.
[0044] In some embodiments, the inner wall of the first insulating sleeve 22 abuts against the surface of the positive electrode 12, and the inner wall of the second insulating sleeve 23 abuts against the surface of the negative electrode 13. Specifically, after abutting, the inner wall of the first insulating sleeve 22 is tightly against the surface of the positive electrode 12, and the inner wall of the second insulating sleeve 23 is tightly against the surface of the negative electrode 13, thereby shaping the positive electrode 12 and the negative electrode 13, closing them up respectively, and providing pre-tightening force to the positive electrode 12 and the negative electrode 13 to prevent tearing during bending. At the same time, it can also prevent metal particles generated when the positive electrode 12 and the negative electrode 13 are welded to the connecting piece from falling into the body 11, avoiding short circuits in the inner core 10, and improving the safety and reliability of the inner core assembly.
[0045] Please see Figure 3 , Figure 3 This is a schematic diagram of the structure of the elastic insulation component in the core assembly provided in the embodiments of this application. In some embodiments, the insulating body 21 has a receiving groove 211 on the side facing the end face 111, and the end of the body 11 near the end face 111 is disposed in the receiving groove 211 and abuts against the inner wall of the receiving groove 211. Specifically, the receiving groove 211 provides a precise positioning space for the side of the body 11 near the end face 111. The body 11 abuts against the inner wall of the receiving groove 211, which can stably cover the insulating body 21 to the end face 111 of the inner core 10, enhance the insulation protection of the inner core 10, effectively reduce the possible electrical contact between the inner core 10 and the outside world, avoid faults such as leakage and short circuit, and improve the safety and reliability of the core assembly.
[0046] Please refer to the following: Figure 4 and Figure 5 , Figure 4 This is a schematic diagram of the second structure of the core assembly provided in an embodiment of this application; Figure 5This is a second exploded structural diagram of the inner core assembly provided in an embodiment of this application. To further improve the applicability of the inner core assembly, in some embodiments, the inner core 10 includes: a first inner core 14, a second inner core 15, and two elastic insulating components 20. The first inner core 14 includes a first body 141, a first positive electrode tab 142, and a first negative electrode tab 143. The first body 141 has a first end face 144, and the first positive electrode tab 142 and the first negative electrode tab 143 are disposed on the first end face 144. The second inner core 15 includes a second body 151, a second positive electrode tab 152, and a second negative electrode tab 153. The second body 151 has a second end face 154, and the second positive electrode tab 152 and the second negative electrode tab 153 are disposed on the second end face 154. Along the length direction Y of the inner core 10, the first end face 144 and the second end face 154 are disposed on opposite sides. Two insulating bodies 21 respectively cover the first end face 144 and the second end face 154. Two first insulating sleeves 22 are respectively sleeved on the first positive electrode tab 142 and the second positive electrode tab 152. Two second insulating sleeves 23 are respectively sleeved on the first negative electrode tab 143 and the second negative electrode tab 153. It is understandable that the core assembly has a wide range of applications. When the tabs of the first core 14 and the second core 15 are arranged on opposite sides, this application provides two elastic insulating components 20 to protect the first core 14 and the second core 15 respectively. This ensures the insulation effect between the first core 14 and the second core 15 and between them and the outside world, effectively preventing electrical faults such as short circuits and leakage, and ensuring the stable and reliable electrical performance of the core assembly. Based on this, along the length Y of the core 10, the first end face 144 and the second end face 154 are arranged on opposite sides, with their respective elastic insulating components 20. This makes the core assembly more flexible in spatial layout, better adaptable to the internal space of equipment with different shapes and structures, meeting diverse scenario requirements, and improving the applicability of the product in different application scenarios.
[0047] In some embodiments, there are multiple first inner cores 14 and multiple second inner cores 15. Two insulating bodies 21 respectively cover multiple first end faces 144 and multiple second end faces 154. Two first insulating sleeves 22 are respectively sleeved on multiple first positive tabs 142 and multiple second positive tabs 152, and two second insulating sleeves 23 are respectively sleeved on multiple first negative tabs 143 and multiple second negative tabs 153. First, by providing multiple first inner cores 14 and multiple second inner cores 15, this application significantly increases the overall capacity of the inner core assembly. Based on this, two insulating bodies 21 respectively cover multiple first end faces 144 and multiple second end faces 154, two first insulating sleeves 22 are fitted on multiple first positive tabs 142 and multiple second positive tabs 152, and two second insulating sleeves 23 are fitted on multiple first negative tabs 143 and multiple second negative tabs 153. This can provide all-round, multi-layer insulation protection for multiple first inner cores 14 and multiple second inner cores 15 on each side, thereby effectively avoiding the risk of short circuit caused by the increase in the number of first inner cores 14 and second inner cores 15, and ensuring the safe and stable operation of the inner core assembly in a complex electrical environment.
[0048] In some embodiments, the number of elastic insulating components 20 is multiple. The insulating body 21 covers at least one first end face 144 or at least one second end face 154. The first insulating sleeve 22 is sleeved on at least one first positive electrode tab 142 or at least one second positive electrode tab 152. The second insulating sleeve 23 is sleeved on at least one first negative electrode tab 143 or at least one second negative electrode tab 153. Specifically, this application uses multiple elastic insulating components 20 to provide targeted insulation protection for the first inner core 14 and the second inner core 15 at different locations according to the layout. In particular, for the first inner core 14 and the second inner core 15 located in areas with high electric field strength or susceptible to external interference, the corresponding elastic insulating components 20 can be used for targeted protection to enhance the insulation performance of the first inner core 14 and the second inner core 15, avoid the risk of leakage or short circuit caused by local electric field concentration, and ensure the safety and reliability of the entire inner core assembly in different working environments. Furthermore, the arrangement of the first insulating sleeve 22 and the second insulating sleeve 23 respectively allows for more flexible and diverse connection methods for the first inner core 14 and the second inner core 15. This enables multiple first inner cores 14 and second inner cores 15 to be connected in different series and parallel configurations according to different electrical performance requirements, while ensuring the insulation safety of each connection part and improving the adaptability and versatility of the inner core assembly.
[0049] In some embodiments, the elastic insulation component 20 is a polypropylene component or a polyethylene terephthalate (PET) component. Specifically, the elastic insulation component 20 uses polypropylene (PP) or polyethylene terephthalate (PET), which has many advantages. Polypropylene (PP) and polyethylene terephthalate (PET) have good insulation properties, which can effectively isolate and insulate the positive electrode tab 12 and the negative electrode tab 13, improve the creepage clearance between the positive electrode tab 12 and the negative electrode tab 13, and reduce the short-circuit risk of the positive electrode tab 12 and the negative electrode tab 13. In addition, polypropylene (PP) and polyethylene terephthalate (PET) also have good elasticity, which allows the elastic insulation component 20 to fit tightly against the roots of the positive electrode tab 12 and the negative electrode tab 13, providing pre-tightening force to the positive electrode tab 12 and the negative electrode tab 13, thereby achieving the shaping and protection of the positive electrode tab 12 and the negative electrode tab 13, preventing tearing when the positive electrode tab 12 and the negative electrode tab 13 are bent, and improving the safety and stability of the inner core component.
[0050] Accordingly, this application also provides a battery cell, including: a housing having a receiving space; and an inner core assembly as described above, the inner core assembly being disposed within the receiving space.
[0051] It is understood that, compared with the prior art, the battery cell provided in this application embodiment includes all the technical features and technical effects of the above-mentioned core components, which will not be repeated here.
[0052] Accordingly, this application also provides a battery pack, including: a plurality of battery cells as described above; a connecting piece, the connecting piece being connected to the positive electrode tab 12 or negative electrode tab 13 of the core assembly in the battery cell. The battery pack is used to store and release electrical energy, and may also include a housing and a plurality of the aforementioned battery cells, the plurality of battery cells being housed in the housing. The battery pack may be a charge-discharge structure composed of a plurality of battery cells, such as a battery module, battery pack, battery cluster, battery stack, battery tower, or battery array. Battery cells include, but are not limited to, lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the embodiments disclosed herein do not limit this to any particular type.
[0053] It is understood that, compared with the prior art, the battery pack provided in this application embodiment includes all the technical features and technical effects of the above-mentioned single battery cells, which will not be repeated here.
[0054] Accordingly, this application also provides an electrical device, including a battery pack as described in the above embodiments. This electrical device can be various types of equipment such as new energy vehicles, computers, and energy storage power supply devices.
[0055] It is understood that, compared with the prior art, the electrical device provided in this application embodiment includes all the technical features and technical effects of the above-mentioned battery pack, and will not be repeated here.
[0056] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.
[0057] The foregoing has provided a detailed description of an internal core component, a battery cell, and a battery pack provided in the embodiments of this application, and has used specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. An inner core assembly, characterized by, The application relates to a battery core elastic insulation assembly. The battery core elastic insulation assembly comprises an inner core (10), an elastic insulation assembly (20), and a plurality of inner cores (10). The inner core (10) comprises a body (11), a positive electrode lug (12) and a negative electrode lug (13), the body (11) has an end face (111), the positive electrode lug (12) and the negative electrode lug (13) are arranged on the end face (111); 2. The inner core assembly of claim 1, wherein, The elastic insulation assembly (20) comprises an insulation body (21), a first insulation sleeve (22) and a second insulation sleeve (23), the first insulation sleeve (22) is sleeved on the positive electrode lug (12), the second insulation sleeve (23) is sleeved on the negative electrode lug (13), and the insulation body (21) is connected with the first insulation sleeve (22) and the second insulation sleeve (23) and covers the end face (111). The application further relates to a battery core elastic insulation assembly. The bodies (11) of the plurality of inner cores (10) are arranged in the thickness direction (X) of the inner core (10), and the end faces (111) of the plurality of inner cores (10) are arranged on the same side.
3. The inner core assembly of claim 2, wherein, The insulation body (21) covers the plurality of end faces (111), the first insulation sleeve (22) is sleeved on the plurality of positive electrode lugs (12), and the second insulation sleeve (23) is sleeved on the plurality of negative electrode lugs (13).
4. The inner core assembly of any one of claims 1 to 3, wherein, The number of the elastic insulation assemblies (20) is plural, the insulation body (21) covers at least one end face (111), the first insulation sleeve (22) is sleeved on at least one positive electrode lug (12), and the second insulation sleeve (23) is sleeved on at least one negative electrode lug (13).
5. The inner core assembly of claim 4, wherein, The inner wall of the first insulation sleeve (22) and the surface of the positive electrode lug (12) are in abutment, and the inner wall of the second insulation sleeve (23) and the surface of the negative electrode lug (13) are in abutment.
6. The inner core assembly of claim 1, wherein, The side of the insulation body (21) facing the end face (111) is provided with a containing groove (211), and one end of the body (11) close to the end face (111) is arranged in the containing groove (211) and in abutment with the inner wall of the containing groove (211). The inner core (10) comprises: A first inner core (14) comprising a first body (141), a first positive electrode lug (142) and a first negative electrode lug (143), the first body (141) has a first end face (144), the first positive electrode lug (142) and the first negative electrode lug (143) are arranged on the first end face (144); A second inner core (15) comprising a second body (151), a second positive electrode lug (152) and a second negative electrode lug (153), the second body (151) has a second end face (154), the second positive electrode lug (152) and the second negative electrode lug (153) are arranged on the second end face (154); Along the length direction (Y) of the inner core (10), the first end face (144) and the second end face (154) are arranged on different sides. Two of the elastic insulation assemblies (20) have two of the insulation bodies (21) respectively covering the first end face (144) and the second end face (154), and two of the first insulation sleeves (22) respectively sleeving the first positive electrode lug (142) and the second positive electrode lug (152), and two of the second insulation sleeves (23) respectively sleeving the first negative electrode lug (143) and the second negative electrode lug (153).
7. The inner core assembly of claim 6, wherein, The number of the first inner core (14) is multiple, the number of the second inner core (15) is multiple, two of the insulation bodies (21) respectively cover multiple of the first end face (144) and multiple of the second end face (154), two of the first insulation sleeves (22) respectively sleeve multiple of the first positive electrode lug (142) and multiple of the second positive electrode lug (152), and two of the second insulation sleeves (23) respectively sleeve multiple of the first negative electrode lug (143) and multiple of the second negative electrode lug (153).
8. The inner core assembly of claim 7, wherein, The number of the elastic insulation assembly (20) is multiple, the insulation body (21) covers at least one of the first end face (144) or at least one of the second end face (154), the first insulation sleeve (22) sleeves at least one of the first positive electrode lug (142) or at least one of the second positive electrode lug (152), and the second insulation sleeve (23) sleeves at least one of the first negative electrode lug (143) or at least one of the second negative electrode lug (153).
9. The inner core assembly of claim 1, wherein, The elastic insulation assembly (20) is a polypropylene assembly or a polyethylene terephthalate assembly.
10. A battery cell characterized by, It comprises: a shell having a containing space; the inner core assembly as claimed in any one of claims 1 to 9 is arranged in the containing space.
11. A battery pack, characterized by It comprises: a plurality of battery monomers as claimed in claim 10; a connecting sheet connected with the positive electrode lug (12) or the negative electrode lug (13) of the inner core assembly in the battery monomer.