Tab, manufacturing method of tab and battery
By employing a dual-layer tab structure and material selection, the balance between battery rate and energy density was resolved, achieving a battery design with high conductivity and high energy density, thus enhancing battery reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-26
- Publication Date
- 2026-03-27
AI Technical Summary
Existing tab designs struggle to simultaneously improve battery rate and energy density, and suffer from issues such as the formation of brittle intermetallic compounds at the welding interface and uneven current density at the tab edge during high-rate charging and discharging.
It adopts a double-layer tab structure, with the first and second conductive layers stacked together. The conductive micropillars are embedded in the micropores, and the conductive isolation part covers the outside of the conductive micropillars. Different materials are used to make the conductive layers to avoid chemical reactions and heat accumulation.
It improves the conductivity of the tabs and the rate of the battery, reduces the space occupied by the tabs, enhances the energy density and reliability of the battery, and avoids thermal failure and the formation of brittle intermetallic compounds.
Smart Images
Figure CN121748729A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery technology, and in particular to a tab, a method for manufacturing the tab, and a battery. Background Technology
[0002] With the accelerating pace of life, users have higher demands for battery charging and discharging speeds, making rapid battery charging and discharging increasingly crucial. The parameter used to measure battery charging and discharging speed is the battery rate; the higher the battery rate, the faster the charging and discharging speed. The battery rate is positively correlated with conductivity. Currently, the conductivity can be improved by increasing the number of battery tabs or by adopting a full-tab structure, thereby increasing the battery rate.
[0003] The energy density of a battery is also crucial, as it determines its capacity and range. Higher energy density results in a larger capacity and longer range.
[0004] However, increasing the number of tabs in a battery, or adopting a full tab structure, reduces the battery's energy density. Current tab configurations cannot simultaneously guarantee high rate capability and high average energy density. Summary of the Invention
[0005] This application provides an electrode tab, a method for manufacturing the electrode tab, and a battery. It solves the problem that existing electrode tabs cannot simultaneously guarantee high battery rate and high battery energy density. The technical solution is as follows: On one hand, a tab is provided, comprising: a first conductive layer and a second conductive layer connected to each other, wherein the first conductive layer and the second conductive layer are stacked together; Wherein, the tab is configured as a first tab in the battery, and the side of the first conductive layer in the first tab facing away from the second conductive layer is electrically connected to a first current collector in the battery; or, the tab is configured as a second tab in the battery, and the side of the second conductive layer in the second tab facing away from the first conductive layer is electrically connected to a second current collector in the battery.
[0006] Optionally, a portion of the second conductive layer is embedded within the first conductive layer.
[0007] Optionally, the side of the first conductive layer facing the second conductive layer has a plurality of micropores; The second conductive layer includes a plurality of conductive micropillars, each of which corresponds one-to-one with a plurality of micropores, and a portion of each conductive micropillar is located within the corresponding micropore.
[0008] Optionally, the plurality of micropores are spaced apart, and there is a gap between any two adjacent conductive micropillars among the plurality of conductive micropillars.
[0009] Optionally, the porosity of the second conductive layer is between 25% and 35%.
[0010] Optionally, the tab further includes: a plurality of conductive isolation portions, each of which corresponds to one of the plurality of conductive micropillars, and the conductive isolation portions cover the outer surface of the corresponding conductive micropillars.
[0011] Optionally, the interior of the first conductive layer has microchannels that penetrate a portion of the first conductive layer and are not connected to the plurality of micropores.
[0012] Optionally, the first conductive layer is a conductive structure made of a first material used to manufacture the first current collector; the second conductive layer is a conductive structure made of a second material used to manufacture the second current collector.
[0013] Optionally, the first electrode tab is a positive electrode tab, and the second electrode tab is a negative electrode tab; the first conductive layer is a conductive structure made of aluminum material, and the second conductive layer is a conductive structure made of copper material.
[0014] Optionally, the first conductive layer is a conductive structure made of an aluminum alloy material doped with scandium.
[0015] On the other hand, a method for manufacturing an electrode tab is also provided, the method being used to manufacture any of the electrode tabs described above, the method comprising: Multiple micropores are formed on the side of the first conductive layer in the electrode facing the second conductive layer; Multiple conductive micropillars are formed within the multiple micropores, and the multiple conductive micropillars constitute the second conductive layer.
[0016] In another aspect, a battery is also provided, comprising: a first current collector, a second current collector, a first electrode tab and a second electrode tab, wherein the first electrode tab and the second electrode tab are either of the electrodes described above, the first electrode tab is electrically connected to the first current collector, and the second electrode tab is electrically connected to the second current collector.
[0017] The beneficial effects of the technical solutions provided in this application include at least the following: The first conductive layer of the first tab in the battery, facing away from the second conductive layer, is connected to the first current collector in the battery. Similarly, the second conductive layer of the second tab, facing away from the first conductive layer, is connected to the second current collector in the battery. This allows the tab to be electrically connected to both the first and second current collectors, making it highly versatile and convenient to use. Furthermore, when the battery with the first and second tabs undergoes an electrolytic reaction and generates current, both the first and second conductive layers in the first and second tabs can conduct electricity, resulting in high conductivity and a high battery rate. Additionally, the battery with the first and second tabs only includes two tabs, occupying a small space and thus achieving a high energy density. Therefore, by incorporating the tabs described in this application into the battery, both a high rate of operation and a high energy density can be ensured. Attached Figure Description
[0018] 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.
[0019] Figure 1 This is a schematic diagram of a battery structure with tabs connected according to an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a tab provided in an embodiment of this application; Figure 3 This is a side view of another electrode provided in an embodiment of this application; Figure 4 This is a side view of another type of electrode provided in the embodiments of this application. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.
[0021] In related technologies, a battery may include a current collector and tabs, and the tabs may be electrically connected to the current collector. The current collector of the battery may include a positive current collector and a negative current collector, and the tab of the battery connected to the positive current collector is the positive tab, and the tab connected to the negative current collector is the negative tab.
[0022] The positive current collector of the battery has a positive electrolyte layer integrated on it, and the negative current collector has a negative electrolyte layer integrated on it. The battery can generate current through an electrolytic reaction between the positive and negative electrolyte layers. The current can be conducted through the positive and negative current collectors, and then through the tabs connected to the positive and negative current collectors to the outside world, and finally to the device to be powered, thus enabling the battery to supply power to the device.
[0023] Regarding the impact of battery tabs on battery rate, the more tabs a battery has, the higher their conductivity, and the higher the battery rate. Therefore, increasing the number of tabs can improve the battery rate. However, regarding the impact of battery tabs on battery energy density, the more tabs a battery has, the more space they occupy, resulting in lower energy density. Thus, there is currently no tab design in related technologies that can balance battery rate and energy density.
[0024] Furthermore, in related technologies, the positive current collector of a battery is generally made of aluminum, while the negative current collector is generally made of copper. The positive electrode tab connected to the positive current collector is generally made of aluminum-to-nickel or aluminum-to-copper-nickel material, while the negative electrode tab connected to the negative current collector is generally made of copper or copper-nickel material.
[0025] When welding the tabs to the current collector, brittle intermetallic compounds are easily formed at the copper-nickel welding interface. The formation of these compounds increases the contact resistance between the tabs and the current collector, leading to greater heat generation, a higher probability of thermal failure, and lower battery reliability. Specifically, CuNi2 is the most likely brittle intermetallic compound to form at the copper-nickel welding interface. The formation of CuNi2 can increase the contact resistance between the tabs and the current collector by up to 50%, significantly increasing the risk of thermal failure of the tabs.
[0026] Furthermore, when the tab is a single-layer tab, during high-rate charging and discharging of the battery, for example, when the battery is charged and discharged at a rate greater than 5C, the current density distribution on the single-layer tab is uneven, and the current density at the edge of the single-layer tab is larger. Specifically, the current density flowing through the edge region of the tab is three times that flowing through the center region of the tab, which leads to stress concentration at the edge of the tab, making the tab more prone to breakage, and thus resulting in lower battery reliability.
[0027] This application provides an embodiment of a tab; please refer to [reference needed]. Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of a battery structure with tabs connected according to an embodiment of this application. Figure 2This is a schematic diagram of a tab structure provided in an embodiment of this application. The tab may include a first conductive layer 101 and a second conductive layer 102 connected to each other. The first conductive layer 101 and the second conductive layer 102 in the tab 100 may be stacked. In this way, the first conductive layer 101 and the second conductive layer 102 are electrically connected.
[0028] The tab can be configured as a first tab 100a in the battery. The side of the first conductive layer 101 of the first tab 100a facing away from the second conductive layer 102 can be connected to the first current collector 200. Alternatively, the tab can be configured as a second tab 100b in the battery. The side of the second conductive layer 102 of the second tab 100b facing away from the first conductive layer 101 can be connected to the second current collector 200.
[0029] The first current collector 200 and the second current collector 300 in the battery can be insulated from each other. In this way, the electrolyte layer integrated on the first current collector 200 will not come into contact with the electrolyte layer integrated on the second current collector 300, thereby ensuring the normal power generation of the battery.
[0030] For example, such as Figure 1 As shown, the battery may also include an insulating film 400, which may be located between the first current collector 200 and the second current collector 300 to achieve insulation between the first current collector 200 and the second current collector 300.
[0031] Thus, the tab in this application can be used to electrically connect to both the first current collector 200 and the second current collector 300 in the battery. Compared to tabs in related technologies that connect to different current collectors, the tab in this application has higher versatility and is easier to use.
[0032] When the battery undergoes an electrolytic reaction to generate current, and the current from the first current collector 200 flows to the first tab 100a connected to the first current collector 200, both the first conductive layer 101 and the second conductive layer 102 in the first tab 100a can conduct electricity. Compared with the single-layer tabs in related technologies, the tabs in this application have higher conductivity.
[0033] Similarly, when the battery undergoes an electrolytic reaction to generate current, and the current from the second current collector 300 flows to the second tab 100b connected to the second current collector 300, both the second conductive layer 102 and the first conductive layer 101 in the second tab 100b can conduct electricity. Compared to the single-layer tabs in related technologies, the tabs in this application have higher conductivity. Thus, when the current generated by the battery is conducted through the first tab 100a and the second tab 100b, the higher conductivity of the first tab 100a and the second tab 100b results in a higher overall conductivity of the battery, thereby enabling a higher rate of operation.
[0034] Furthermore, after applying the tabs of this application to the battery, the battery only includes a first tab 100a and a second tab 100b connected to the first current collector 200 and the second current collector 300, respectively. Compared with the related art methods of increasing the battery rate by setting multiple tabs or setting all tabs, the first tab 100a and the second tab 100b in the battery connected with the tabs of this application occupy less space, resulting in a higher energy density of the battery. Thus, by setting the first tab 100a and the second tab 100b in the battery, both a high rate of increase and a high energy density of the battery can be ensured.
[0035] Furthermore, the tab in this application includes a first conductive layer 101 and a second conductive layer 102, that is, the tab in this application is a double-layer tab. Compared with the single-layer tab in related technologies, when the battery is charged and discharged at a higher rate, for example, when the battery is charged and discharged at a rate greater than 5C, the current density distribution flowing through the tab of the battery is uniform, and there is no problem of excessive current density at the edge of the tab causing stress concentration and breakage at the edge of the tab, which makes the tab more reliable, and thus the battery more reliable.
[0036] In summary, this application provides a tab that includes a first conductive layer and a second conductive layer connected together. The first conductive layer of the first tab, positioned in the battery, is connected to a first current collector in the battery on the side facing away from the second conductive layer. The second conductive layer of the second tab, positioned in the battery, is connected to a second current collector in the battery on the side facing away from the first conductive layer. Thus, the tab can be used for electrical connection to both the first and second current collectors, offering high versatility and ease of use. Furthermore, when the battery with the first and second tabs connected undergoes an electrolytic reaction to generate current, and the current from the first current collector flows to the first tab, and the current from the second current collector flows to the second tab, both the first and second conductive layers in the first and second tabs can conduct electricity, resulting in high conductivity of the tabs and a high battery rate. In addition, the battery with the first and second tabs connected only includes two tabs, occupying a small space, thus resulting in high energy density of the battery. By incorporating the tabs described in this application into the battery, both a high rate of operation and a high energy density can be ensured.
[0037] It should be noted that the battery in this application can be either a cylindrical battery or a prismatic battery. In a cylindrical battery, the two terminals can be located at both ends. In a prismatic battery, the two terminals can be located at one end.
[0038] Optional, such as Figure 2 As shown, a portion of the second conductive layer 102 of the electrode can be embedded within the first conductive layer 101. That is, a portion of the second conductive layer 102 can be embedded within the first conductive layer 101, while another portion of the second conductive layer 102 can be located outside the first conductive layer 101. This interlocking connection of the first conductive layer 101 and the second conductive layer 102 in the electrode results in a high degree of reliability in the connection between the first conductive layer 101 and the second conductive layer 102.
[0039] Optional, such as Figure 3 As shown, Figure 3 This is a side view of another electrode tab provided in this application embodiment. The first conductive layer 101 in the electrode tab may have multiple micropores 101a on the side facing the second conductive layer 102. The second conductive layer 102 in the electrode tab may include multiple conductive micropillars 102a. The multiple conductive micropillars 102a in the second conductive layer 102 may correspond one-to-one with the multiple micropores 101a in the first conductive layer 101. A portion of the conductive micropillar 102a may be located within the corresponding micropore 101a, that is, a portion of the conductive micropillar 102a may be embedded into the corresponding micropore 101a. In this way, through the interlocking connection of multiple conductive micropillars 102a within the corresponding micropores 101a, the interlocking connection between a portion of the second conductive layer 102 and the first conductive layer 101 can be achieved, thereby ensuring the reliability of the connection between the first conductive layer 101 and the second conductive layer 102 in the electrode tab.
[0040] In this application, the first conductive layer 101 can be made of aluminum, and the second conductive layer 102 can be made of copper. During the manufacturing process of the tab, a first conductive layer 101 with multiple micropores 101a on one side can be first manufactured using aluminum. Here, a laser micro-hole processing technology can be used to process the multiple micropores 101a on one side of the first conductive layer 101. Next, a pulse electroplating process can be used to electroplat copper into the multiple micropores 101a to fill the micropores 101a and form conductive micropillars 102a. By forming conductive micropillars 102a through electroplating within the multiple micropores 101a, it can be ensured that the multiple conductive micropillars 102a are connected one-to-one with the multiple micropores 101a.
[0041] Optional, such as Figure 3 As shown, the plurality of micropores 101a in the first conductive layer 101 can be spaced apart, and there is a gap between any two adjacent conductive micropillars 102a in the plurality of conductive micropillars 102a in the second conductive layer 102. Here, when electroplating conductive micropillars 102a into the micropores 101a using an electroplating process, only the micropores 101a are filled to form conductive micropillars 102a, and copper is not electroplated between any two connected micropores 101a, so as to ensure that there is a gap between any two adjacent conductive micropillars 102a in the plurality of conductive micropillars 102a.
[0042] In this way, there is a gap between any two adjacent conductive micropillars 102a in the second conductive layer 102, so that the heat generated when the current passes through the tab 100 can be dissipated to the outside through the gap between any two adjacent conductive micropillars 102a, thus preventing the tab 100 from thermally failing due to the accumulation of a large amount of heat.
[0043] Optionally, the porosity of the second conductive layer 102 can be between 25% and 35%. That is, the ratio of the total area of the orthographic projection of the plurality of voids in the second conductive layer 102 onto the first conductive layer 101 to the area of the orthographic projection of the second conductive layer 102 onto the first conductive layer 101 can be between 25% and 35%, and the ratio of the total area of the orthographic projection of the plurality of conductive micropillars 102a in the second conductive layer 102 onto the first conductive layer 101 to the area of the orthographic projection of the second conductive layer 102 onto the first conductive layer 101 can be between 65% and 75%.
[0044] This ensures that the second conductive layer 102 has a certain strength and a large number of conductive micropillars 102a that can be properly welded to the second current collector 300, while also ensuring that the second conductive layer 102 has a certain heat dissipation effect, thus ensuring good heat dissipation of the tab.
[0045] It should be noted that the conductive micropillars 102a in the second conductive layer 102 of the electrode tab can be nanoscale conductive micropillars. Macroscopically, the second conductive layer 102 has a layered structure; microscopically, it comprises multiple spaced conductive micropillars 102a. This ensures that the second conductive layer 102 can be properly welded to the second current collector 300 while also guaranteeing good heat dissipation for the second electrode tab 102, preventing heat concentration and thus enhancing its reliability.
[0046] Optional, such as Figure 4 As shown, Figure 4 This is a side view of another type of electrode tab provided in this application embodiment. The electrode tab may further include a plurality of conductive isolation portions 103. The conductive isolation portions 103 in the electrode tab 100 may correspond one-to-one with a plurality of conductive micropillars 102a, and the conductive isolation portions 103 may cover the outer surface of the corresponding conductive micropillars 102a. Here, the conductive isolation portions 103 covering the outer surface of the conductive micropillars 102a may separate the conductive micropillars 102a of the second conductive layer 102 from the first conductive layer 101.
[0047] When current flows through the tab, the conductive isolation part 103 can separate the first conductive layer 101 and the corresponding conductive micropillar 102a, so that no chemical reaction occurs between the first conductive layer 101 and the conductive micropillar 102a to form brittle intermetallic compounds. This avoids an increase in the contact resistance between the first conductive layer 101 and the second conductive layer 102. As a result, when current flows through the tab, no chemical reaction occurs between the second conductive layer 102 and the first conductive layer 101, and no brittle intermetallic compounds are formed. This prevents an increase in the contact resistance between the first conductive layer 101 and the second conductive layer 102, thus improving the reliability of the tab.
[0048] It should be noted that when the first conductive layer 101 in the tab is made of aluminum and the second conductive layer 102 is made of copper, the conductive isolation part 103 in the tab can be made of nickel-phosphorus alloy. Nickel-phosphorus alloy can prevent the diffusion of copper and aluminum and avoid the growth of brittle intermetallic compounds between the first conductive layer 101 and the second conductive layer 102.
[0049] Optionally, the interior of the first conductive layer 101 in the tab may have microchannels. The microchannels of the first conductive layer 101 may extend through a portion of the first conductive layer 101, and the multiple micropores 101a of the first conductive layer 101 are not interconnected.
[0050] Here, the microchannels of the first conductive layer 101 extend through a portion of the first conductive layer 101, meaning that the microchannels of the first conductive layer 101 are connected to the outside world, but are not connected to the multiple micropores 101a, ensuring that micropillars 102a can be electroplated normally within the micropores 101a. In this way, when current flows through the tab, the heat generated by the tab can also be dissipated to the outside world through the microchannels of the first conductive layer 101, further preventing the tab from thermally failing due to the accumulation of large amounts of heat.
[0051] Optionally, the first conductive layer 101 in the tab can be a conductive structure made of a first material used to manufacture the first current collector 200. The second conductive layer 102 in the tab can be a conductive structure made of a second material used to manufacture the second current collector 300.
[0052] In this way, both the first current collector 200 and the first conductive layer 101 in the tab are made of the first material, so that when the first conductive layer 101 in the tab is welded to the first current collector 200, no chemical reaction will occur between the first conductive layer 101 in the tab and the first current collector 200 to produce brittle intermetallic compounds, thereby avoiding an increase in the contact resistance between the tab and the first current collector 200 and reducing the risk of tab thermal failure.
[0053] Similarly, both the second current collector 300 and the second conductive layer 102 in the tab are made of the second material, so that when the second conductive layer 102 in the tab is welded to the second current collector 200, no chemical reaction will occur between the second conductive layer 102 in the tab and the second current collector 300 to produce brittle intermetallic compounds, thereby avoiding an increase in the contact resistance between the tab and the second current collector 300 and reducing the risk of thermal failure of the tab.
[0054] Optionally, the first tab 100a can be a positive tab, so the first current collector 200 connected to the first tab 100a can be a positive current collector. The first conductive layer 101 can be a conductive structure made of aluminum, that is, both the first current collector 200 and the first conductive layer 101 of the tab can be made of aluminum.
[0055] The second tab 100b can be a negative tab, so the second current collector 300 connected to the second tab 100b can be a negative current collector. The second conductive layer 102 can be a conductive structure made of copper, that is, both the second current collector 300 and the second conductive layer 102 of the tab can be made of copper.
[0056] Both aluminum and copper have good electrical conductivity. Here, the first current collector 200, which serves as the positive current collector, has a high operating potential. Aluminum forms a dense oxide film at high potentials, which can prevent corrosion of the positive current collector, while copper oxidizes and dissolves at high potentials. Therefore, the first current collector 200, serving as the positive current collector, is made of aluminum. Furthermore, to ensure a better welding effect between the first current collector 200 and the first conductive layer 101 of the electrode tab, the first conductive layer 101 of the electrode tab is also made of aluminum.
[0057] The second current collector 300, which serves as the negative electrode current collector, has a low operating potential. Copper is stable at low potentials, therefore the second current collector 300, which serves as the negative electrode current collector, is made of copper. In addition, to ensure a better welding effect between the second current collector 300 and the second conductive layer 102 of the tab 100, the second conductive layer 102 of the tab 100 is also made of copper.
[0058] Optionally, the first conductive layer 101 in the tab can be made of an aluminum alloy material doped with scandium. Here, the scandium-doped aluminum alloy material has good support properties, enabling the first conductive layer 101 to provide good mechanical support. For example, the first conductive layer 101 can contain 0.2-0.5 wt% scandium, and the scandium grain size can be less than 5 micrometers.
[0059] It should be noted that the first conductive layer 101 of the electrode is made of aluminum, and the second conductive layer 102 of the electrode is made of copper. When electroplating conductive micropillars 102a into the micropores 101a of the first conductive layer 101, in order to avoid the generation of excessive brittle intermetallic compounds, such as CuAl2, through a chemical reaction between the copper conductive micropillars 102a and the aluminum first conductive layer 101, the conductive micropillars 102a can be electroplated in a protective atmosphere. For example, this protective atmosphere can be a mixture of Ar and H2.
[0060] Furthermore, during the electroplating of the conductive micropillars 102a, the growth of the interfacial compound can be monitored in real time using X-ray diffraction, preventing the formation of excessive brittle intermetallic compounds between the conductive micropillars 102a and the first conductive layer 101. For example, by monitoring the growth of the interfacial compound in real time using X-ray diffraction, the thickness of the brittle intermetallic compound between the conductive micropillars 102a and the first conductive layer 101 can be controlled to be less than or equal to 500 nanometers.
[0061] In summary, this application provides a tab that includes a first conductive layer and a second conductive layer connected together. The first conductive layer of the first tab, positioned in the battery, is connected to a first current collector in the battery on the side facing away from the second conductive layer. The second conductive layer of the second tab, positioned in the battery, is connected to a second current collector in the battery on the side facing away from the first conductive layer. Thus, the tab can be used for electrical connection to both the first and second current collectors, offering high versatility and ease of use. Furthermore, when the battery with the first and second tabs connected undergoes an electrolytic reaction to generate current, and the current from the first current collector flows to the first tab, and the current from the second current collector flows to the second tab, both the first and second conductive layers in the first and second tabs can conduct electricity, resulting in high conductivity of the tabs and a high battery rate. In addition, the battery with the first and second tabs connected only includes two tabs, occupying a small space, thus resulting in high energy density of the battery. By incorporating the tabs described in this application into the battery, both a high rate of operation and a high energy density can be ensured.
[0062] This application also provides a method for manufacturing a tab, which can be used to manufacture the tab in the above embodiments. The method for manufacturing a tab may include: Step S1: Multiple micropores are formed on the side of the first conductive layer in the tab facing the second conductive layer.
[0063] Step S2: Multiple conductive micropillars are formed in the multiple micropores of the first conductive layer, and the multiple conductive micropillars form the second conductive layer.
[0064] This application also provides a battery, which includes: a first current collector, a second current collector, a first electrode, and a second electrode. The first electrode and the second electrode in the battery are the same as those in the above embodiments, with the first electrode electrically connected to the first current collector and the second electrode electrically connected to the second current collector.
[0065] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.
[0066] Those skilled in the art will understand that all or part of the steps of the above embodiments can be implemented by hardware or by a program instructing related hardware. The program can be stored in a computer-readable storage medium, such as a read-only memory, a disk, or an optical disk.
[0067] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A type of electrode, characterized in that, include: A first conductive layer (101) and a second conductive layer (102) are connected to each other, and the first conductive layer (101) and the second conductive layer (102) are stacked together; The electrode tab is configured as a first electrode tab (100a) in the battery, wherein the first conductive layer (101) in the first electrode tab (100a) is electrically connected to a first current collector (200) in the battery on the side opposite to the second conductive layer (102); or, the electrode tab is configured as a second electrode tab (200b) in the battery, wherein the second conductive layer (102) in the second electrode tab (100b) is electrically connected to a second current collector (200) in the battery on the side opposite to the first conductive layer (101).
2. The electrode tab according to claim 1, characterized in that, A portion of the second conductive layer (102) is embedded within the first conductive layer (101).
3. The electrode tab according to claim 2, characterized in that, The first conductive layer (101) has a plurality of micropores (101a) on the side facing the second conductive layer (102). The second conductive layer (102) includes a plurality of conductive micropillars (102a), each of which corresponds to a plurality of micropores (101a), and a portion of each conductive micropillar (102a) is located within the corresponding micropore (101a).
4. The electrode tab according to claim 3, characterized in that, The plurality of micropores (101a) are spaced apart, and there is a gap between any two adjacent conductive micropillars (102a) among the plurality of conductive micropillars (102a).
5. The electrode tab according to claim 4, characterized in that, The porosity of the second conductive layer (102) is between 25% and 35%.
6. The electrode tab according to claim 3, characterized in that, The electrode tab also includes a plurality of conductive isolation portions (103), which correspond one-to-one with the plurality of conductive micropillars (102a), and the conductive isolation portions (103) cover the outer surface of the corresponding conductive micropillars (102a).
7. The electrode tab according to any one of claims 2-6, characterized in that, The first conductive layer (101) has microchannels inside, which penetrate a portion of the first conductive layer (101) and are not connected to the plurality of micropores (101a).
8. The electrode tab according to any one of claims 1-6, characterized in that, The first conductive layer (101) is a conductive structure made of a first material used to manufacture the first current collector (200); the second conductive layer (102) is a conductive structure made of a second material used to manufacture the second current collector (300).
9. The electrode tab according to claim 8, characterized in that, The first tab (100a) is a positive tab, and the second tab (100a) is a negative tab; the first conductive layer (101) is a conductive structure made of aluminum material, and the second conductive layer (102) is a conductive structure made of copper material.
10. The electrode tab according to claim 9, characterized in that, The first conductive layer (101) is a conductive structure made of an aluminum alloy material doped with scandium.
11. A method for manufacturing a tab, characterized in that, The method is used to manufacture the electrode tab according to any one of claims 1-10, and the method includes: Multiple micropores are formed on the side of the first conductive layer in the electrode facing the second conductive layer; Multiple conductive micropillars are formed within the multiple micropores, and the multiple conductive micropillars constitute the second conductive layer.
12. A battery, characterized in that, include: The device comprises a first current collector, a second current collector, a first electrode, and a second electrode, wherein the first electrode and the second electrode are both electrodes as described in any one of claims 1-10, the first electrode is electrically connected to the first current collector, and the second electrode is electrically connected to the second current collector.