Current collector plate, battery and electric device
By adding insulating components to the outer surface of the current collector and covering the connecting section with insulating material, the problem of friction between the current collector and the electrode assembly is solved, improving the safety and stability of the battery, and enhancing current transmission efficiency and thermal management performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUIZHOU EVE POWER CO LTD
- Filing Date
- 2025-06-04
- Publication Date
- 2026-07-14
AI Technical Summary
In existing lithium-ion batteries, the protection between the current collector and the electrode assembly is weak, which leads to friction that generates metal shavings or scratches, affecting electrical performance.
An insulating component is added to the outer surface of the manifold, with a coverage area of 10% ≤ S2/S1 ≤ 100%, and an insulating component is also installed at the contact point between the connecting section and the housing, with a coverage area of 10% ≤ S3/S4 ≤ 100%, to prevent friction and scratches.
It effectively avoids friction between the current collector and the electrode assembly, improves the battery's safety, stability and mechanical strength, enhances current transmission efficiency and thermal management performance, and extends its service life.
Smart Images
Figure CN224502256U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery technology, specifically to a current collector, a battery, and an electrical device. Background Technology
[0002] Most lithium-ion batteries on the market use a current collector that is welded to the core on one side and connected to the casing or terminals on the other side to achieve electrical connection. In these technologies, due to limited internal space, if the side where the current collector connects to the electrode assembly is poorly protected, the current collector will rub against the electrode assembly, resulting in metal shavings or scratches inside the electrode assembly, affecting its electrical performance. Utility Model Content
[0003] Embodiments of this application provide a manifold, battery, and electrical device that can improve the technical problem of weak manifold protection.
[0004] In a first aspect, embodiments of this application provide a current collector for use in a battery, the battery including a housing and an electrode assembly mounted within the housing, the housing including a bottom wall and side walls surrounding the bottom wall, the current collector including:
[0005] A body is disposed on one side of an electrode assembly, the body including a first outer surface facing the electrode assembly, the area of the first outer surface being S1;
[0006] An insulating element is provided on the first outer surface, and the area of the insulating element covering the first outer surface is S2, where 10% ≤ S2 / S1 ≤ 100%.
[0007] In some embodiments, the collector plate further includes a connecting segment connected to the body, the connecting segment extending away from the electrode assembly, and the connecting segment including a second outer surface facing the sidewall;
[0008] The insulating element is also covered on the second outer surface. The total area of the insulating element covering the first outer surface and the second outer surface is S3, and the total area of the first outer surface and the second outer surface is S4, where 10% ≤ S3 / S4 ≤ 100%.
[0009] In some embodiments, 20% ≤ S1 / S2 ≤ 50%;
[0010] And / or, 20% ≤ S3 / S4 ≤ 50%.
[0011] In some embodiments, the collector plate further includes a protective element covering the side of the body opposite to the electrode assembly;
[0012] And / or, the protective element is applied to the side of the connecting section opposite to the sidewall.
[0013] In some embodiments, the connecting segment forms a groove that is recessed away from the sidewall, and the sidewall includes a protrusion that is embedded in the groove.
[0014] In some embodiments, the body has at least one through hole, the body includes a hole wall facing each of the through holes, and the insulating member covers each of the hole walls.
[0015] In some embodiments, the insulating element is one of plastic, coating, adhesive tape, or rubber.
[0016] In some embodiments, the insulating element is plastic, the thickness of the plastic is H1, and the total thickness of the manifold and the plastic is H2, where 20% ≤ H1 / H2 ≤ 65%.
[0017] This application also includes a battery including the current collector as described above, the battery further including an electrode assembly, a housing and a top cover, the electrode assembly being disposed within the housing, the housing having an opening, and the top cover being disposed on the opening and connected to the electrode assembly.
[0018] This application also provides an electrical device, which includes the battery as described above.
[0019] The beneficial effects of the embodiments of this application are as follows:
[0020] In the embodiments of this application, the current collector includes a body and an insulating component. The body includes a first outer surface facing the electrode assembly, and the insulating component covers the first outer surface. The area of the first outer surface is S1, and the area of the insulating component covering the first outer surface is S2, where 10% ≤ S2 / S1 ≤ 100%. By increasing the insulating protection area of the current collector, scratches or metal shavings generated by the friction between the electrode assembly and the current collector during the welding process can be effectively avoided, which could lead to a short circuit or damage to the battery, thereby improving the overall safety and stability of the current collector. Attached Figure Description
[0021] 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.
[0022] Figure 1 This is a side view of the battery provided in an embodiment of this application. Figure 1 ;
[0023] Figure 2 This is a side view of the manifold provided in an embodiment of this application.Figure 1 ;
[0024] Figure 3 This is an enlarged schematic diagram of a portion A of the collector disk provided in an embodiment of this application;
[0025] Figure 4 This is a side view of the battery provided in an embodiment of this application. Figure 2 ;
[0026] Figure 5 This is a side view of the manifold provided in an embodiment of this application. Figure 2 ;
[0027] Figure 6 This is an enlarged schematic diagram of a portion B of the collector disk provided in an embodiment of this application;
[0028] Figure 7 This is a side view of the battery provided in an embodiment of this application. Figure 3 ;
[0029] Figure 8 This is an enlarged schematic diagram of a portion C of the collector disk provided in an embodiment of this application;
[0030] Figure 9 This is a top view of the manifold provided in an embodiment of this application. Figure 1 ;
[0031] Figure 10 This is a top view of the manifold provided in an embodiment of this application. Figure 2 .
[0032] Explanation of reference numerals in the attached figures:
[0033] 100. Battery; 101. Electrode assembly; 102. Housing; 121. Side wall; 1021. Protrusion; 1022. Groove;
[0034] 10. Collector disk;
[0035] 20. Body; 201. Through hole; 21. First outer surface;
[0036] 30. Insulating components;
[0037] 40. Connecting section; 41. Second outer surface;
[0038] 50. Protective components; Detailed Implementation
[0039] 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 the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.
[0040] Currently, lithium-ion batteries typically use a current collector plate that is welded to the core on one side and connected to the casing or terminals on the other side to achieve electrical connection. In these technologies, while the metal current collector conducts electricity, the limited internal space of the battery means that if the outer surface of the current collector plate is poorly protected, it can rub against the electrode assembly, resulting in metal shavings or scratches inside the electrode assembly, thus affecting the electrical performance of the electrode assembly.
[0041] Please refer to Figures 1-3 , Figure 1 This is a side view of the battery provided in an embodiment of this application. Figure 1 , Figure 2 This is a side view of the manifold provided in an embodiment of this application. Figure 1 , Figure 3 This is an enlarged schematic diagram of a portion A of the manifold provided in an embodiment of this application.
[0042] This application provides a current collector 10 applied to a battery 100, the battery 100 further including an electrode assembly 101 and a housing 102. The electrode assembly 101 is disposed within the housing 102, and the housing 102 includes a bottom wall and side walls 121 surrounding the bottom wall. The current collector 10 includes a body 20 and an insulating member 30 disposed on one side of the electrode assembly 101. The body 20 includes a first outer surface 21 facing the electrode assembly 101, the area of the first outer surface 21 being S2. The insulating member 30 covers the first outer surface 21, the area of the insulating member 30 covering the first outer surface 21 being S1, where 10% ≤ S1 / S2 ≤ 100%.
[0043] By adding an insulating component 30 to the outer surface of the current collector 10, and the insulating component 30 and the body 20 having a large coverage area, the friction between the current collector 10 and the electrode assembly inside the battery 100 during the welding process of the current collector 10 and the electrode assembly 101 can be effectively prevented, thus avoiding scratches and metal shavings on the electrode assembly that could cause short circuits or damage to the battery 100, thereby improving the overall safety and stability of the current collector 10.
[0044] Understandably, covering a larger area of battery 100 with insulating material can effectively improve the safety, reliability, durability and stability of battery 100, ensuring long-term stable operation of battery 100 and reducing the risk of accidents.
[0045] The percentage of the area of the insulating element 30 covering the first outer surface 21 can be 10% ≤ S2 / S1 ≤ 80%, 10% ≤ S2 / S1 ≤ 70%, 10% ≤ S2 / S1 ≤ 60%, 20% ≤ S2 / S1 ≤ 90%, 20% ≤ S2 / S1 ≤ 80%, 20% ≤ S2 / S1 ≤ 70%, 20% ≤ S2 / S1 ≤ 60%, 30% ≤ S2 / S1 ≤ 100%, 30% ≤ S2 / S1 ≤ 80%, 30% ≤ S2 / S1 ≤ 70%, 30% ≤ S2 / S1 ≤ 60%, etc., and this application does not impose any limitations on this.
[0046] Please refer to Figures 4-5 , Figure 4 This is a side view of the battery provided in an embodiment of this application. Figure 2 , Figure 5 This is a side view of the manifold provided in an embodiment of this application. Figure 2 , Figure 6 This is an enlarged schematic diagram of a portion B of the manifold provided in an embodiment of this application.
[0047] In some embodiments, the collector plate 10 further includes a connecting section 40 connected to the body 20, the connecting section 40 extending away from the electrode assembly 101, and the connecting section 40 including a second outer surface 41 facing the sidewall 121;
[0048] The insulating element 30 is also covered on the second outer surface 41. The total area of the insulating element 30 covering the first outer surface 21 and the second outer surface 41 is S3, and the total area of the first outer surface 21 and the second outer surface 41 is S4, where 10% ≤ S3 / S4 ≤ 100%.
[0049] Specifically, one side of the current collector 10 is welded to the core of the battery 100, while the other side of the current collector 10 is connected to the battery housing 102 to complete the overall electrical connection of the battery 100. This design not only ensures the stable performance of the battery 100 but also effectively improves the current transmission efficiency, enabling the battery 100 to perform excellently in various application scenarios. The insulating component 30 is also covered on the second outer surface 41 to prevent friction between the current collector 10 and the housing 102 when they are connected, thus avoiding scratches or metal shavings.
[0050] In addition, this connection method can enhance the mechanical strength of the battery 100 and provide better thermal management performance, thereby extending the service life of the battery 100.
[0051] In some embodiments, three connecting segments 40 may be provided, with the three folded edges evenly spaced along the periphery of the body 20. Providing multiple connecting segments 40 can increase the edge strength of the collector plate 10, preventing deformation or breakage of the edge of the collector plate 10 due to external forces, and making the collector plate more stable when subjected to greater pressure or impact.
[0052] The percentage of the total area of the insulating element 30 covering the first outer surface 21 and the second outer surface 41 relative to the total area of the first outer surface 21 and the second outer surface 41 can also be 10%≤S3 / S4≤80%, 10%≤S3 / S4≤70%, 10%≤S3 / S4≤60%, 20%≤S3 / S4≤90%, 20%≤S3 / S4≤80%, 20%≤S3 / S4≤70%, 20%≤S3 / S4≤60%, 30%≤S3 / S4≤100%, 30%≤S3 / S4≤80%, 30%≤S3 / S4≤70%, 30%≤S3 / S4≤60%, etc., which are not limited in this application.
[0053] In some embodiments, when the insulating element 30 covers the first outer surface, 20% ≤ S1 / S2 ≤ 50%, and when the insulating element 30 covers the first outer surface 21 and the second outer surface 41, 20% ≤ S3 / S4 ≤ 50%.
[0054] In some embodiments, when the insulating element 30 covers the first outer surface 21, 20% ≤ S1 / S2 ≤ 50%, and when the insulating element 30 covers the first outer surface 21 and the second outer surface 41, the total coverage area is not limited.
[0055] When the insulating element 30 covers the first outer surface 21 and the second outer surface 41, the total area of the insulating element 30 covering the first outer surface 21 and the second outer surface 41 can be 22%≤S3 / S4≤48%, 25%≤S3 / S4≤45%, 28%≤S3 / S4≤42%, 30%≤S3 / S4≤40%, 32%≤S3 / S4≤38%, etc., which are not limited in this application.
[0056] It is understandable that if the coverage area of the insulating component 30 is too small, the process control will be more difficult. If the coverage area is too large, the utilization rate of the insulating component 30 in the protection of the battery 100 will be low, which may result in the waste of the insulating component 30.
[0057] It should be noted that during further welding, the insulating component 30 may be penetrated, at which point S1 / S2 and S3 / S4 may not reach 100%.
[0058] In some embodiments, the manifold 10 further includes a protective element 50, which covers the side of the body 20 opposite to the electrode assembly 101. Understandably, the inner protective element 50 primarily provides additional safety during welding, especially under excessive welding power, preventing the manifold 10 from melting and leaking. This protective element 50 can be made of high-temperature resistant and high-strength materials, effectively withstanding extreme welding conditions. Furthermore, it possesses good thermal stability, ensuring its structural integrity is maintained during prolonged high-temperature operation, thereby extending the service life of the manifold 10.
[0059] In some embodiments, the protective member 50 covers the side of the body 20 facing away from the electrode assembly.
[0060] In some embodiments, the protective member 50 is not only covered on the side of the body 20 away from the electrode assembly, but also on the side of the connecting section 40 away from the housing.
[0061] Figure 7 This is a side view of the battery provided in an embodiment of this application. Figure 3 , Figure 8 This is an enlarged schematic diagram of a portion C of the manifold provided in an embodiment of this application.
[0062] In some embodiments, the connecting segment 40 forms a groove, the groove 1022 is recessed in a direction away from the sidewall 121, the groove 1022 includes a slot facing the sidewall 121, the sidewall 121 includes a protrusion 1021, the protrusion 1021 is embedded in the groove.
[0063] Specifically, in this application, the current collector 10 is disposed on one side of the electrode assembly 101, while the other side of the current collector 10 is connected to the ground and abuts against the inner wall of the side wall 121 of the battery 100, enabling the current to flow stably and efficiently. This further enhances the overall stability of the structure. The connecting section 40 of this application is provided with a groove, which physically provides a certain degree of buffering effect. The groove 1022 gives the connecting section 40 a certain elasticity, which can effectively absorb and mitigate the impact on the battery 100 caused by internal stress or external vibration generated during use, thereby improving the reliability and durability of the battery 100 in various working environments.
[0064] In some embodiments, the connecting segment 40 is a vertical structure, perpendicular to the body 20. In this case, no protrusion is provided on the side wall, and the connecting segment 40 is horizontally attached to the side wall 121.
[0065] Please refer to Figures 9-10 , Figure 9 This is a top view of the manifold provided in an embodiment of this application. Figure 1 , Figure 10 This is a top view of the manifold provided in an embodiment of this application. Figure 2 .
[0066] In some embodiments, the body 20 is provided with at least one through hole 201, the body 20 includes a hole wall facing each of the through holes, and the insulating member 30 covers each of the hole walls.
[0067] Understandably, during the electrical connection process, the through holes 201 of the manifold 10 may be damaged due to mechanical impact, chemical corrosion, or other reasons, resulting in deformation or cracking of the holes. The insulating element 30 covering each of the hole walls helps to improve the protection of the through holes 201 and prevent the hole walls from being scratched or cracked.
[0068] The main body 20 may have one or more through holes 201. The through holes 201 on the current collector 10 provide better channels for the electrolyte, allowing it to penetrate evenly into the electrode material of the battery 100. Through these through holes 201, the electrolyte can better contact the electrode surface, ensuring that the electrochemical reaction proceeds uniformly throughout the battery 100, thereby improving the performance and efficiency of the battery 100.
[0069] In some embodiments, the insulating element 30 is one of plastic, coating, adhesive tape, and rubber.
[0070] In some embodiments, the insulating component 30 is made of plastic. Plastic materials themselves have excellent electrical insulation properties, which can effectively prevent current leakage and protect electrical equipment and personnel safety. In addition, plastic materials also have the advantages of strong corrosion resistance and high temperature resistance, so they can be used for a long time under harsh environmental conditions.
[0071] In some embodiments, the insulating element 30 is made of plastic, the thickness of the plastic is H1, and the total thickness of the manifold 10 and the plastic is H2, where 20% ≤ H1 / H2 ≤ 65%.
[0072] Understandably, thicker plastic material provides better insulation, enhancing the safety and durability of the battery 100 and preventing leakage and short circuits. Furthermore, the plastic layer increases the structural strength of the battery 100, making it more resistant to external impacts and mechanical damage. However, the heavier plastic material occupies more internal space, potentially limiting the battery 100's capacity and energy density, affecting its overall performance. It may even increase the battery 100's total weight, hindering its lightweight design. Therefore, the amount of plastic material should be within a suitable range.
[0073] The value is not limited to 20% ≤ H1 / H2 ≤ 65%, but can also be 20% ≤ H1 / H2 ≤ 65%, 20% ≤ H1 / H2 ≤ 65%, 20% ≤ H1 / H2 ≤ 65%, 20% ≤ H1 / H2 ≤ 65%, 20% ≤ H1 / H2 ≤ 65%, 20% ≤ H1 / H2 ≤ 65%, etc. This application does not limit the value of the value of the value of the value of the value of the value of the value of the value of the value of the value of the value of the value of the value of the value of the value of the value of the value of the value of the value of the value of the value of the value of the value of the value of the value of the value of the value of the value of the value of the value of the value of the value of the value of the value of the value of the value of the value of the value of the value of the value
[0074] In some embodiments, the insulating element 30 is a coating. After curing, the insulating coating forms a hard protective element 50 that resists external physical damage, chemical corrosion, and abrasion. This coating is generally more rigid and is typically thin, providing a uniform coating effect and ensuring that the shape and size of the component are not affected. In situations where the internal space of the battery 100 is limited, the size of the current collector 10 can be better controlled. Furthermore, the insulating coating has excellent adhesion to many material surfaces, bonding firmly to the body 20 and preventing coating peeling or detachment. This is particularly important in environments with high vibration or dynamic loads.
[0075] In some embodiments, the insulating element 30 is adhesive tape. Insulating tape typically has excellent flexibility, allowing it to adapt to complex or irregular surfaces and easily wrap electrical components, wires, cables, etc. This makes it particularly suitable for use on narrow, curved, or difficult-to-handle components. The use of insulating tape is very simple, saving assembly time and labor costs.
[0076] In some embodiments, the insulating element 30 is made of rubber. Rubber material has excellent flexibility and elasticity, allowing it to adapt to surfaces of different shapes and sizes. It can effectively wrap around irregularly shaped or complex electrical components, ensuring a tight fit and providing good electrical isolation. Furthermore, rubber material has excellent vibration and shock resistance. It can effectively absorb and buffer shocks and vibrations from the outside world, protecting the current collector 10 or battery 100 from damage.
[0077] This application also provides a battery 100, which includes the aforementioned collector 10. The battery also includes an electrode assembly 101, a housing 102, and a top cover. The electrode assembly 101 is disposed inside the housing 102. The housing has an opening, and the top cover is disposed on the opening and connected to the electrode assembly.
[0078] Battery 100 may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc. The battery cell may be cylindrical, flat, cuboid, or other shapes, etc. The embodiments of this application are not limited in this respect, and this application does not limit it.
[0079] This application also provides an electrical device, which includes the battery 100 as described above, and the battery 100 is used to provide electrical energy to the electrical device. The electrical device can be an electric vehicle, power tool, electric bicycle, energy storage system, drone, mobile device, etc. By incorporating the battery 100, the safety of the electrical device can be ensured and its service life can be improved.
[0080] The embodiments of this application have been described in detail above. Specific examples have been used 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 method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.
Claims
1. A current collector for use in a battery, the battery comprising a housing and an electrode assembly mounted within the housing, the housing comprising a bottom wall and side walls surrounding the bottom wall, characterized in that, The collector panel includes: A body is disposed on one side of an electrode assembly, the body including a first outer surface facing the electrode assembly, the area of the first outer surface being S1; An insulating element is provided on the first outer surface, and the area of the insulating element covering the first outer surface is S2, where 10% ≤ S2 / S1 ≤ 100%.
2. The collector disk according to claim 1, characterized in that, The collector plate also includes a connecting section connected to the body, the connecting section extending away from the electrode assembly, and the connecting section including a second outer surface facing the sidewall; The insulating element is also covered on the second outer surface. The total area of the insulating element covering the first outer surface and the second outer surface is S3, and the total area of the first outer surface and the second outer surface is S4, where 10% ≤ S3 / S4 ≤ 100%.
3. The collector disk according to claim 2, characterized in that, 20% ≤ S1 / S2 ≤ 50%; And / or, 20% ≤ S3 / S4 ≤ 50%.
4. The collector disk according to claim 3, characterized in that, The collector also includes a protective element, which is provided on the side of the body away from the electrode assembly; And / or, the protective element is applied to the side of the connecting section opposite to the sidewall.
5. The collector disk according to claim 3, characterized in that, The connecting section forms a groove, which is recessed away from the sidewall. The groove includes an opening facing the sidewall, and the sidewall includes a protrusion that is embedded in the groove.
6. The collector disk according to claim 1, characterized in that, The body has at least one through hole, the body includes a hole wall facing each of the through holes, and the insulating element covers each of the hole walls.
7. The collector disk according to any one of claims 1-6, characterized in that, The insulating component is one of plastic, coating, adhesive paper, or rubber.
8. The collector disk according to claim 7, characterized in that, The insulating component is made of plastic, the thickness of which is H1, and the total thickness of the manifold and the plastic is H2, where 20% ≤ H1 / H2 ≤ 65%.
9. A battery, characterized in that, The battery includes the current collector as described in any one of claims 1-8, and further includes an electrode assembly, a housing, and a top cover, wherein the electrode assembly is disposed within the housing, the housing has an opening, and the top cover is disposed over the opening and connected to the electrode assembly.
10. An electrical appliance, characterized in that, Includes the battery as described in claim 9.