An electrode structure and a battery

Abstract

The utility model provides a kind of pole piece structure and battery, the pole piece structure includes diaphragm and pole piece component, diaphragm is wound into annular structure along first axial direction, diaphragm is multiple, multiple diaphragm is arranged along first direction interval, two adjacent diaphragms are defined into pole piece installation area, first direction is orthogonal to first axial direction, pole piece component includes pole piece, current collector and tab, tab is connected with pole piece by current collector, pole piece is divided into positive pole piece and negative pole piece, positive pole piece and negative pole piece are all into annular structure by winding mode, in along first direction, positive pole piece and negative pole piece are sequentially arranged in pole piece installation area, the tab on positive pole piece and the tab on negative pole piece are oppositely arranged in first axial direction, current collector has protrusion, the protrusion extends along the direction of being away from pole piece, protrusion is multiple, multiple protrusions are arranged along the extension direction of pole piece.The pole piece structure of the utility model embodiment can inhibit the emergence of edge wrinkle, with the advantage that overall integrity is strong.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, specifically to an electrode structure and a battery. Background Technology

[0002] Lithium-ion batteries possess advantages such as high energy density, long lifespan, balanced performance at high and low temperatures, safety and reliability, and environmental friendliness, leading to their increasing application in power sources for automobiles, energy storage power stations, and consumer products. As the energy density of lithium batteries continues to increase, the size of cylindrical batteries is also trending towards larger dimensions. To improve battery energy density, reduce internal resistance, and meet the demands of high-current charging and discharging, traditional electrode gap coating and tab welding methods are being replaced by continuous electrode coating and full tab flattening welding methods.

[0003] The use of a full-tab structure for cylindrical battery electrodes significantly reduces the complexity of cell manufacturing, simplifies the process, and results in cells with lower resistance, enabling high-current charging and discharging. In related technologies, the copper and aluminum foil current collectors at the ends of the battery electrodes still employ a flat-edge structure. When the electrodes are arranged using a full-tab flattening and welding method after being wound into a core, the stress generated during winding cannot be released, often leading to tearing at the structural edges and bends of the electrodes, resulting in poor contact with the electrode base and a low yield rate. Utility Model Content

[0004] This utility model aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, embodiments of this utility model propose an electrode structure and a battery, wherein the electrode structure can suppress the occurrence of edge wrinkles and has the advantage of strong overall integrity.

[0006] The electrode structure of this utility model embodiment includes: A diaphragm is wound into a ring structure along a first axial direction. There are multiple diaphragms, which are arranged at intervals along the first direction. An electrode mounting area is defined between two adjacent diaphragms. The first direction is orthogonal to the first axial direction. An electrode assembly includes an electrode, a current collector, and tabs. The tabs are connected to the electrode via the current collector. The electrode is divided into a positive electrode and a negative electrode, both of which are wound into a ring structure. Along a first direction, the positive and negative electrode are alternately arranged in the electrode mounting area. The tabs on the positive electrode and the tabs on the negative electrode are arranged opposite each other along the first axial direction. The current collector has protrusions that extend in a direction away from the electrode. There are multiple protrusions that are spaced apart along the extension direction of the electrode.

[0007] In this embodiment of the electrode structure, the separator, positive electrode, and negative electrode are layered and wound. After winding, the exposed tabs are flattened and stacked by mechanical flattening to facilitate welding to the electrode base. During winding and flattening, the wrinkles that commonly appear on curved surfaces in flat-edge structures in related technologies disappear at the stress-resistant grooves formed by this raised structure, which can suppress the appearance of wrinkles. The groove opening guides the crack to propagate along a predetermined path, avoiding random through-cracks, thereby ensuring the overall integrity of the current collector at the edge of the electrode and ensuring a high yield rate.

[0008] In some embodiments, a plurality of tabs are arranged on one electrode sheet, the plurality of tabs are spaced apart along the extension direction of the electrode sheet, and the distance between two adjacent tabs is equal between two adjacent protrusions of the plurality of protrusions.

[0009] In some embodiments, the electrode structure of this utility model further includes a plurality of electrode tab groups, one of the electrode tab groups including a plurality of electrode tabs arranged at intervals orthogonal to the first axis, and the plurality of electrode tab groups arranged at intervals circumferentially along the first axis.

[0010] In some embodiments, the electrode includes a connecting segment and a bent segment connected together. The connecting segment connects the bent segment and the current collector. The bent segment is bent in a direction toward the first axial direction. On the same side of the electrode, the bent segments are connected sequentially after being flattened.

[0011] In some embodiments, the electrode assembly further includes a connecting member that connects the electrode and the current collector.

[0012] In some embodiments, the connecting component is integrally formed with the current collector.

[0013] In some embodiments, the connecting member has a connecting groove located on the side of the connecting member away from the electrode, and a portion of the electrode tab is placed within the connecting groove.

[0014] In some embodiments, the cross-sectional area of ​​the connecting member gradually decreases in the direction from the electrode to the connecting member.

[0015] In some embodiments, at least one of the current collector, the connecting component, and the electrode tab has a microporous structure on its surface, and the surfaces of the current collector, the connecting component, and the electrode tab are all coated with conductive adhesive.

[0016] The battery of this utility model embodiment includes a casing and an electrode assembly. The casing is used to fill an electrolyte, and the electrode assembly is an electrode structure according to any one of the above embodiments. Attached Figure Description

[0017] Figure 1 This is a cross-sectional schematic diagram of the electrode structure according to an embodiment of the present invention.

[0018] Figure 2 This is a top view schematic diagram of the electrode structure according to an embodiment of the present invention.

[0019] Figure 3 This is a schematic diagram of the electrode assembly of the electrode structure according to an embodiment of the present invention.

[0020] Figure 4 yes Figure 3 An enlarged view of point A shown in the diagram.

[0021] Figure label: 100. First axial direction, 1. Diaphragm, 2. Electrode assembly: 211, positive electrode plate; 212, positive current collector; 213, positive electrode tab; 221, negative electrode plate; 222, negative current collector; 223, negative electrode tab. 23. Protrusion, 24. Electrode assembly, 251. Connecting section; 252. Bending section; 26. Connecting components, 27. Microporous structure. Detailed Implementation

[0022] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0023] like Figures 1-4 As shown, the electrode structure of this utility model embodiment includes a diaphragm 1 and an electrode assembly 2.

[0024] Diaphragm 1 along the first axial direction 100 (e.g.) Figure 1The electrode assembly 2 is formed into a ring structure by winding (up and down direction). There are multiple diaphragms 1. Along the first direction, the multiple diaphragms 1 are arranged at intervals. The electrode mounting area is defined between two adjacent diaphragms 1. The first direction is orthogonal to the first axial direction 100. The electrode assembly 2 includes an electrode, a current collector and an electrode tab. The electrode tab is connected to the electrode through the current collector. The electrode is divided into a positive electrode 211 and a negative electrode 221. Both the positive electrode 211 and the negative electrode 221 are formed into a ring structure by winding. Along the first direction, the positive electrode 211 and the negative electrode 221 are arranged alternately in the electrode mounting area. The electrode tab on the positive electrode 211 and the electrode tab on the negative electrode 221 are arranged opposite to each other in the first axial direction 100. The current collector has a protrusion 23. The protrusion 23 extends in a direction away from the electrode. There are multiple protrusions 23. The multiple protrusions 23 are arranged at intervals along the extension direction of the electrode.

[0025] Specifically, such as Figures 1-4 As shown, multiple diaphragms 1 are arranged along the first direction, and an electrode mounting area is defined between every two adjacent diaphragms 1 to facilitate subsequent electrode mounting, which helps to optimize the arrangement of the electrode, reduce the stress generated during the winding process, and thus reduce the risk of tearing at the structural edges and electrode tab bends.

[0026] In the first direction, there are multiple electrode mounting areas. The positive electrode 211 and the negative electrode 221 are alternately arranged in the electrode mounting areas, which helps to balance the electrochemical performance of the battery and improve the energy density. Among them, the current collector connected to the positive electrode 211 is positive current collector 212 and positive electrode tab 213, respectively, and the current collector connected to the negative electrode 221 is negative current collector 222 and negative electrode tab 223, respectively.

[0027] It is understandable that, such as Figures 1-4 As shown, the positive current collector 212 and the positive electrode tab 213 are connected to the upper end of the positive electrode plate 211, and the negative current collector 222 and the negative electrode tab 223 are connected to the lower end of the negative electrode plate 221. That is, the positive electrode tab 213 on the positive electrode plate 211 and the negative electrode tab 223 on the negative electrode plate 221 are arranged opposite to each other on the first axial direction 100. This optimizes the arrangement of the tabs, reduces mutual interference between the tabs, and improves the reliability and yield of the welding.

[0028] The protrusions 23 extend in a direction away from the electrode, that is, the protrusions 23 on the positive electrode current collector 212 extend upwards, and the protrusions 23 on the negative electrode current collector 222 extend downwards. Stress-resistant grooves are defined between adjacent protrusions 23, which can suppress wrinkles during winding and flattening, prevent random through-fractures, and thus ensure the overall integrity of the current collector at the electrode edge, ensuring a high yield rate.

[0029] Preferably, the current collector can be made of a material that can undergo elastic deformation (such as copper, aluminum, nickel, etc.) so that the foil between the stress-resistant grooves can undergo elastic deformation.

[0030] In other words, the electrode structure of this embodiment of the present invention involves layering and winding the diaphragm 1, positive electrode 211, and negative electrode 221. After winding, the exposed tabs are flattened and stacked by mechanical flattening to facilitate welding to the electrode base. During winding and flattening, the wrinkles that commonly appear on curved surfaces in flat-edge structures in related technologies disappear at the stress-resistant groove formed by the protrusion 23 structure, which can suppress the appearance of wrinkles. The groove opening of the stress-resistant groove guides the crack to expand along a predetermined path, avoiding random through-cracks, thereby ensuring the overall integrity of the current collector at the edge of the electrode and ensuring a high yield rate.

[0031] In some embodiments, multiple tabs are arranged on an electrode sheet, and the multiple tabs are spaced apart along the extension direction of the electrode sheet (e.g., ...). Figure 2 The protrusions are arranged in a left-right direction, and the distance between two adjacent protrusions 23 is equal between two adjacent pole ears.

[0032] It is understandable that, such as Figures 1-4 As shown, multiple positive electrode tabs 213 are arranged on the positive electrode plate 211, and multiple negative electrode tabs 223 are arranged on the negative electrode plate 221. The following description uses the positive electrode plate 211 as an example. Multiple protrusions 23 are arranged between two adjacent positive electrode tabs 213, and stress-resistant grooves are defined between two adjacent protrusions 23, and the length between each stress-resistant groove is equal.

[0033] In other words, the evenly spaced arrangement of the multiple protrusions 23 helps to release the stress generated during winding and flattening, preventing tearing and poor contact at the electrode edges. The evenly distributed tabs and protrusions 23 improve the mechanical strength of the electrode, preventing bending or breakage during manufacturing and use. This design simplifies the manufacturing process, reduces production costs, and is particularly suitable for large-scale production of high-performance batteries.

[0034] In some embodiments, the electrode structure of this utility model further includes a plurality of electrode tab groups 24. Each electrode tab group 24 includes a plurality of electrodes arranged at intervals along a first axis 100 orthogonal to it. The plurality of electrode tab groups 24 are arranged circumferentially at intervals along the first axis 100.

[0035] Specifically, such as Figures 1-4 As shown, each tab group 24 includes multiple tabs, and the multiple tab groups 24 are arranged circumferentially at intervals along the first axis 100, which can ensure that the tabs are evenly distributed throughout the entire circumference of the electrode sheet, further optimizing the current distribution.

[0036] It is understandable that, such as Figures 1-4As shown, multiple tab groups 24 are radially distributed, and the spacing of the multiple tab groups 24 ensures that the ends of the electrode plates are not completely covered, so as to expose enough pores to ensure heat dissipation and provide enough space for the flow of electrolyte.

[0037] In some embodiments, the electrode includes a connecting segment 251 and a bending segment 252 connected together. The connecting segment 251 connects the bending segment 252 and the current collector. The bending segment 252 is bent in a direction toward the first axial direction 100. On the same side of the electrode, the bending segments 252 are connected in sequence after being flattened.

[0038] It is understandable that, such as Figures 1-4 As shown, the electrode consists of two parts: a connecting section 251 and a bending section 252. The connecting section 251 connects the bending section 252 to the current collector, ensuring smooth current transmission. The bending section 252, through its bending design, adapts to the winding and flattening process of the electrode, releasing stress and preventing tearing or breakage.

[0039] In other words, the tabs are arranged on the same side of the electrode sheet and connected sequentially after being flattened by the bending section 252. The design of the bending section 252 effectively releases the stress during the winding and flattening process, preventing tearing and breakage of the electrode sheet edges. The arrangement of the tabs on the same side optimizes the current distribution and reduces problems such as local overheating and uneven performance. It simplifies the connection and management of the tabs, improves manufacturing efficiency, and enhances battery reliability.

[0040] In some embodiments, the electrode assembly 2 further includes a connecting member 26, which connects the electrode and the current collector.

[0041] Specifically, such as Figures 1-4 As shown, the connecting component 26 is used in the electrode assembly 2 to connect the electrode and the current collector, ensuring smooth current transmission between the electrode and the current collector and avoiding energy loss or local overheating due to poor contact.

[0042] Understandably, the connecting component 26 can firmly fix the electrode to the current collector, preventing loosening or detachment due to vibration or stress during manufacturing and use. Through a reasonable connection method and arrangement, the stress generated during the winding and flattening process of the electrode is released, preventing tearing or breakage at the electrode edges.

[0043] Optionally, the connecting component 26 can take different forms depending on the specific manufacturing process and application scenario, such as connecting the current collector and the electrode by welding, riveting, etc.

[0044] Preferably, the connecting component 26 is integrally formed with the current collector.

[0045] It is understandable that the connecting component 26 and the current collector are integrally formed, and processes such as stamping, laser cutting, casting or forging can be used to ensure the structural integrity and performance consistency of the connecting component 26 and the current collector.

[0046] In other words, the integrated design reduces contact resistance at the connection points, improves current transmission efficiency, and reduces energy loss. The overall structure can better withstand the stress generated during manufacturing and use, reducing the risk of loosening or detachment due to vibration or impact. It not only reduces the steps required to separately manufacture the connecting components 26 and the current collector, lowering manufacturing costs and time and improving production efficiency, but also reduces potential failure points at the connection points, improving battery reliability and lifespan.

[0047] In some embodiments, the connecting member 26 has a connecting groove located on the side of the connecting member 26 away from the electrode, and a portion of the electrode tab is placed in the connecting groove.

[0048] Specifically, such as Figures 1-4 As shown, the connecting groove is located on the side away from the electrode, ensuring that the electrode is not disturbed during operation and maintains normal electrochemical reaction. Placing the tab portion within the connecting groove ensures a secure connection between the tab and the connecting component 26, reducing contact resistance and improving current transmission efficiency. Furthermore, it enhances the mechanical stability of the tab, preventing loosening or breakage due to vibration or stress during manufacturing and use.

[0049] Understandably, the width and depth of the connecting groove need to match the size of the tab to ensure that the tab can be securely placed in the groove and prevent loosening. The shape design of the connecting groove needs to be optimized to increase the contact area between the tab and the connecting component 26, reduce contact resistance, and improve current transmission efficiency.

[0050] Preferably, the inner surface of the connecting groove needs to be smooth to avoid damage to the electrode tabs caused by friction or stress concentration, and to ensure good contact between the electrode tabs and the connecting component 26.

[0051] In some embodiments, the cross-sectional area of ​​the connecting member 26 gradually decreases in the direction from the electrode to the connecting member 26.

[0052] Understandably, the cross-sectional area of ​​the connecting component 26 gradually decreases, meaning that the connecting component 26 has a trapezoidal structure. This allows for a smooth transition of stress, reduces stress concentration, and prevents breakage or damage caused by excessive stress. Furthermore, by adjusting the cross-sectional area, the current distribution can be optimized, reducing local overheating and voltage drop, and improving current transmission efficiency.

[0053] In other words, the tapered design can improve the mechanical connection stability between the connecting component 26 and the electrode, preventing loosening or detachment due to vibration or impact during manufacturing and use.

[0054] In some embodiments, at least one of the current collector, the connecting member 26, and the electrode tab has a microporous structure 27 on its surface, and the surfaces of the current collector, the connecting member 26, and the electrode tab are all coated with conductive adhesive.

[0055] It is understandable that, such as Figures 1-4 As shown, the microporous structure 27 significantly increases the surface area, promoting the penetration and adhesion of the conductive adhesive and enhancing the strength and conductivity of the connection. The microporous structure 27 also provides more contact points and mechanical locking, improving the adhesion between the conductive adhesive and the substrate material and reducing contact resistance. Furthermore, the microporous structure 27 can disperse stress, reduce stress concentration, improve the mechanical stability of the connection, and prevent loosening or breakage due to vibration or impact.

[0056] In other words, the combination of the microporous structure 27 and the conductive adhesive significantly improves the connection stability between the current collector, the connecting component 26, and the electrode tab, reducing the risk of failure due to loosening or detachment. The microporous structure 27 increases the adhesion area of ​​the conductive adhesive, reduces contact resistance, improves current transmission efficiency, and reduces energy loss. The combination of the microporous structure 27 and the conductive adhesive improves the mechanical strength of the connection, preventing loosening or breakage due to vibration or impact, and improving battery reliability.

[0057] Furthermore, by reducing contact resistance and energy loss, the battery temperature distribution is optimized, reducing the risk of localized overheating and improving the battery's thermal management performance. By improving connection stability and conductivity, internal battery losses are reduced, extending battery life.

[0058] The battery of this utility model embodiment includes a casing and an electrode assembly. The casing is used to fill an electrolyte, and the electrode assembly is an electrode structure according to any of the above embodiments.

[0059] Understandably, the outer casing is typically made of high-strength and corrosion-resistant metallic materials, such as stainless steel, nickel, or nickel-plated steel. These materials effectively protect the internal structure of the battery and prevent damage from the external environment. The electrode assembly includes a positive electrode 211 and a negative electrode 221, which are formed into a ring structure by winding. The positive and negative electrode 221 are alternately arranged within the electrode mounting area defined by the separator 1 to form a complete electrode assembly. The electrolyte is typically composed of an organic solvent (such as carbonate solvents) and a lithium salt (such as lithium hexafluorophosphate), exhibiting good ionic conductivity and electrochemical stability.

[0060] In other words, the battery of this embodiment of the invention, through its tab structure and optimized tab arrangement, reduces the length of the current path, lowers internal resistance, and increases energy density. The microporous structure 27 increases the adhesion area of ​​the conductive adhesive, reduces contact resistance, and further improves energy density. The optimized connection design and conductive adhesive coating reduce contact resistance and improve current transmission efficiency, thereby enhancing charge and discharge efficiency. The uniform distribution of the tabs and the tapered design of the connecting component 26 optimize current distribution, reduce localized overheating, and improve charge and discharge efficiency. The design of the protrusion 23 and the stress-resistant groove, along with the tapered connecting component 26, optimizes stress distribution, reduces the risk of tearing and breakage at the electrode edges, and improves the battery's cycle life. By reducing contact resistance and optimizing current distribution, the battery's internal losses are reduced, extending cycle life.

[0061] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0062] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0063] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0064] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0065] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0066] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An electrode structure, characterized in that, include: A diaphragm is wound into a ring structure along a first axial direction. There are multiple diaphragms, which are arranged at intervals along the first direction. An electrode mounting area is defined between two adjacent diaphragms. The first direction is orthogonal to the first axial direction. An electrode assembly includes an electrode, a current collector, and tabs. The tabs are connected to the electrode via the current collector. The electrode is divided into a positive electrode and a negative electrode, both of which are wound into a ring structure. Along a first direction, the positive and negative electrode are alternately arranged in the electrode mounting area. The tabs on the positive electrode and the tabs on the negative electrode are arranged opposite each other along the first axial direction. The current collector has protrusions that extend in a direction away from the electrode. There are multiple protrusions that are spaced apart along the extension direction of the electrode.

2. The electrode structure according to claim 1, characterized in that, A plurality of tabs are arranged on one of the electrode sheets, and the plurality of tabs are arranged at intervals along the extension direction of the electrode sheet. The distance between two adjacent tabs and between two adjacent protrusions of the plurality of protrusions is equal.

3. The electrode structure according to claim 2, characterized in that, It also includes multiple electrode groups, each electrode group comprising multiple electrodes spaced apart orthogonal to the first axis, and the multiple electrode groups being circumferentially spaced apart along the first axis.

4. The electrode structure according to claim 3, characterized in that, The electrode sheet includes a connecting section and a bending section connected together. The connecting section connects the bending section and the current collector. The bending section is bent in a direction toward the first axial direction. On the same side of the electrode sheet, the bending sections are connected in sequence after being flattened.

5. The electrode structure according to any one of claims 1-4, characterized in that, The electrode assembly further includes a connecting component that connects the electrode and the current collector.

6. The electrode structure according to claim 5, characterized in that, The connecting component is integrally formed with the current collector.

7. The electrode structure according to claim 6, characterized in that, The connecting component has a connecting groove located on the side of the connecting component away from the electrode plate, and a portion of the electrode tab is placed within the connecting groove.

8. The electrode structure according to claim 7, characterized in that, In the direction from the electrode to the connecting member, the cross-sectional area of ​​the connecting member gradually decreases.

9. The electrode structure according to claim 8, characterized in that, At least one of the current collector, the connecting component, and the electrode tab has a microporous structure on its surface, and the surfaces of the current collector, the connecting component, and the electrode tab are all coated with conductive adhesive.

10. A battery, characterized in that, The battery includes a casing and an electrode assembly, the casing being filled with an electrolyte, and the electrode assembly being an electrode structure according to any one of claims 1-9.

Images