Battery cell and battery
By stacking electrodes and separators, multiple individual cells are formed, solving the limitations of capacity and charge/discharge of traditional stacked batteries. This achieves thinner and lighter batteries and more efficient processing, meeting the power supply needs of different devices.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG LIWINON ENERGY TECHNOLOGY CO LTD
- Filing Date
- 2025-07-09
- Publication Date
- 2026-07-14
AI Technical Summary
Traditional stacked battery structures have limitations in capacity and charge/discharge, cannot be made thinner or lighter, and have complicated splicing processes, resulting in low processing efficiency.
The design employs intersecting first and second-direction electrode plates, which are connected by an insulating layer between the first and second electrode plates to form at least two individual battery cells. The electrode plates and separator are stacked to form a single battery cell, avoiding redundant component splicing, improving processing efficiency and reducing space occupation.
It achieves improvements in battery capacity and charge/discharge capabilities, increased processing efficiency, and a thinner, lighter battery design, while meeting the power supply needs of various devices.
Smart Images
Figure CN224501969U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery technology, and in particular to a battery cell and a battery. Background Technology
[0002] Currently, traditional stacked battery structures are mostly single-cell structures or dual-cell splicing structures. Single-cell structures have certain limitations in capacity and charging / discharging. Dual-cell structures use a splicing method, resulting in more redundant components, requiring more space, which is not conducive to the design of thinner and lighter batteries. In addition, the splicing method is complicated and leads to reduced processing efficiency. Utility Model Content
[0003] The technical problem to be solved by this utility model is: how to solve the limitations of capacity and charging / discharging in the existing technology, as well as the inability to make it thinner and lighter.
[0004] To solve the above-mentioned technical problems, this utility model provides a battery cell having an intersecting first direction and a second direction, including a first electrode and a second electrode spaced apart along the second direction, and a diaphragm provided between the first electrode and the second electrode;
[0005] Along the first direction, the first electrode includes at least two first sub-electrodes, a first insulating layer is provided between two adjacent first sub-electrodes, and each first sub-electrode is provided with a first electrode tab;
[0006] Along the first direction, the second electrode includes at least two second sub-electrodes, a second insulating layer is provided between two adjacent second sub-electrodes, and each second sub-electrode is provided with a second electrode tab;
[0007] Wherein, the orthographic projection of the first sub-electrode along the second direction overlaps with the orthographic projection of the second sub-electrode along the second direction, and along the second direction, the electrode polarities of the first sub-electrode and the second sub-electrode are opposite, so that the first electrode, the second electrode and the separator form at least two battery cells.
[0008] More preferably, along the first direction, the electrode polarities of two adjacent first sub-electrodes are the same, and the electrode polarities of two adjacent second sub-electrodes are the same.
[0009] More preferably, along the first direction, the electrode polarities of two adjacent first sub-electrodes are opposite, and the electrode polarities of two adjacent second sub-electrodes are opposite.
[0010] More preferably, two adjacent battery cells are connected in parallel or in series.
[0011] More preferably, the second electrode further includes:
[0012] A first ceramic insulating layer is disposed on the side of the second sub-electrode near the second electrode tab;
[0013] And / or, the first ceramic insulating layer is disposed on the side of the first sub-electrode near the first electrode tab.
[0014] More preferably, the first sub-electrode includes a first current collector and a first active material layer, the first active material layer is coated on the surface of the first current collector, and the first electrode tab is electrically connected to the first current collector;
[0015] The second sub-electrode includes a second current collector and a second active material layer, the second active material layer being coated on the surface of the second current collector, and the second electrode tab being electrically connected to the second current collector.
[0016] More preferably, along the first direction, the electrodes of two adjacent first current collectors have the same polarity;
[0017] The materials of the first active material layers coated on the two adjacent first current collectors are the same;
[0018] Alternatively, the materials of the first active material layers coated on two adjacent first current collectors may be different.
[0019] More preferably, along the first direction, the electrodes of two adjacent second current collectors have the same polarity;
[0020] The materials of the second active material layers coated on two adjacent second current collectors are the same;
[0021] Alternatively, the materials of the second active material layers coated on two adjacent second current collectors may be different.
[0022] More preferably, along the first direction, the electrode polarities of two adjacent first current collectors are opposite;
[0023] And, the electrodes of the two adjacent second current collectors have opposite polarities.
[0024] This utility model also provides a battery, including a casing and the aforementioned battery cell, wherein the casing covers the battery cell.
[0025] Compared with the prior art, the advantages of the battery cell and battery provided by this utility model are as follows:
[0026] In this invention, at least two first sub-electrodes are connected through a first insulating layer to form a first electrode, and at least two second sub-electrodes are connected through a first insulating layer to form a second electrode. Thus, when the first electrode, the second electrode, and the separator are stacked along a second direction, a corresponding set of first sub-electrodes, second sub-electrodes, and the separator along the second direction forms a single battery cell. When there are two or more first and second sub-electrodes, two or more single battery cells can be formed, thereby achieving the simultaneous formation of at least two single battery cells in a single stacking, which improves the battery's capacity and charge / discharge capability. In addition, by using the first and second electrode stacks of this invention, at least two single battery cells can be formed without the need for redundant components, improving processing efficiency. Furthermore, the stacking method can reduce the space occupied by the battery cells, making the battery thinner and lighter. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of the structure of the first electrode sheet in Embodiment 1 of this utility model.
[0028] Figure 2 This is a schematic diagram of the structure of the second electrode in Embodiment 1 of this utility model.
[0029] Figure 3 This is a schematic diagram of the first and second electrode sheets after being stacked in Embodiment 1 of this utility model.
[0030] Figure 4 This is a cross-sectional view of the first and second electrode sheets after being stacked in Embodiment 1 of this utility model.
[0031] Figure 5 This is a schematic diagram of the parallel connection of individual battery cells as described in Embodiment 1 of this utility model.
[0032] Figure 6 This is a schematic diagram of the battery cell connected in series according to Embodiment 1 of this utility model.
[0033] Figure 7 This is a schematic diagram of the structure of the first electrode sheet in Embodiment 2 of this utility model.
[0034] Figure 8 This is a schematic diagram of the structure of the second electrode sheet in Embodiment 2 of this utility model.
[0035] Figure 9 This is a schematic diagram of the first and second electrode sheets after being stacked in Embodiment 2 of this utility model.
[0036] Figure 10 This is a schematic diagram of the structure of the first electrode sheet in Embodiment 3 of this utility model.
[0037] Figure 11 This is a schematic diagram of the structure of the second electrode in Embodiment 3 of this utility model.
[0038] Figure 12 This is a schematic diagram of the first and second electrode sheets stacked together in Embodiment 3 of this utility model.
[0039] Figure 13 This is a schematic diagram of the structure of the first electrode sheet in Embodiment 4 of this utility model.
[0040] Figure 14 This is a schematic diagram of the structure of the second electrode in Embodiment 4 of this utility model.
[0041] Figure 15 This is a schematic diagram of the first and second electrode sheets after being stacked in Embodiment 4 of this utility model.
[0042] Figure 16 This is a schematic diagram of the structure of the first electrode sheet in Embodiment 5 of this utility model.
[0043] Figure 17 This is a schematic diagram of the structure of the second electrode in Embodiment 5 of this utility model.
[0044] Figure 18 This is a schematic diagram of the first and second electrode sheets after being stacked in Embodiment 5 of this utility model.
[0045] Figure 19 This is a schematic diagram of the structure of the first electrode sheet in Embodiment 6 of this utility model.
[0046] Figure 20 This is a schematic diagram of the structure of the second electrode in Embodiment 6 of this utility model.
[0047] Figure 21 This is a schematic diagram of the first and second electrode sheets stacked together in Embodiment 6 of this utility model.
[0048] Figure label:
[0049] 10. First electrode; 11. First sub-electrode; 11a. First negative electrode; 11b. First positive electrode; 12. First insulating layer; 13. First tab; 13a. First negative tab; 13b. First positive tab; 14. Second ceramic insulating layer;
[0050] 20. Second electrode; 21. Second sub-electrode; 21a. Second positive electrode; 21b. Second negative electrode; 22. Second insulating layer; 23. Second tab; 23a. Second positive tab; 23b. Second negative tab; 24. First ceramic insulating layer;
[0051] 30. Diaphragm;
[0052] 100. Single battery cell;
[0053] X, the first direction; Y, the second direction. Detailed Implementation
[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.
[0055] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.
[0056] 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," and "circumferential" used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings are used 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.
[0057] 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.
[0058] Furthermore, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0059] 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.
[0060] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0061] Example 1
[0062] like Figures 1-6 As shown, this utility model provides a battery cell having intersecting first direction X and second direction Y.
[0063] In some implementations, the first direction X and the second direction Y intersect perpendicularly.
[0064] In some embodiments, the battery cell includes a first electrode 10 and a second electrode 20 spaced apart along a second direction Y, with a diaphragm 30 between the first electrode 10 and the second electrode 20, and the first electrode 10, the diaphragm 30 and the second electrode 20 are stacked sequentially to form the battery cell.
[0065] In some embodiments, to address the limitations of existing technologies in terms of capacity and charge / discharge, as well as the inability to achieve thinner designs, the first electrode 10 includes at least two first sub-electrodes 11 along the first direction X, with a first insulating layer 12 between adjacent first sub-electrodes 11, and each first sub-electrode 11 having a first tab 13; the second electrode 20 includes at least two second sub-electrodes 21 along the first direction X, with a second insulating layer 22 between adjacent second sub-electrodes 21, and each second sub-electrode 21 having a second tab 23; wherein the orthographic projection of the first sub-electrode 11 along the second direction Y overlaps with the orthographic projection of the second sub-electrode 21 along the second direction Y, and the electrode polarities of the first sub-electrode 11 and the second sub-electrode 21 are opposite along the second direction Y, so that the first electrode 10, the second electrode 20, and the separator 30 form at least two battery cells 100, such as... Figure 3Within the dashed line range; when the first electrode 10, the second electrode 20, and the separator 30 are stacked along the second direction Y, a set of first sub-electrodes 11, second sub-electrodes 21, and separators corresponding to each other along the second direction Y form a single cell 100. When there are two or more first sub-electrodes 11 and second sub-electrodes 21, two or more single cell 100s can be formed, thereby achieving the simultaneous formation of at least two single cell 100s in one stacking, which improves the battery capacity and charge / discharge capability.
[0066] In addition, by stacking the first electrode 10 and the second electrode 20 of this utility model, at least two battery cells 100 can be formed without the need for redundant components to be spliced, which improves processing efficiency. Moreover, the stacking method can reduce the space occupied by the battery cells, making the battery lighter and thinner.
[0067] In this embodiment, along the first direction X, the first electrode 10 includes two first sub-electrodes 11. The two first sub-electrodes 11 have the same electrode polarity, both being negative sub-electrodes. Each of the two first sub-electrodes 11 is provided with a first tab 13, which is a negative tab. Figure 1 As shown; the second electrode 20 includes two second sub-electrodes 21, both of which have the same electrode polarity and are positive sub-electrodes. Each of the two second sub-electrodes 21 is provided with a second tab 23, which is a positive tab. Figure 2 As shown; whereby, after the first electrode 10, the diaphragm 30, and the second electrode 20 are stacked, due to the insulating effect of the first insulating layer 12 and the second insulating layer 22, two battery cells 100 can be formed after stacking, as shown. Figure 3 and Figure 4 As shown, each cell 100 includes a negative electrode and a positive electrode, with a separator 30 located between the negative electrode and the positive electrode. Each cell 100 also includes a negative electrode tab and a positive electrode tab, thus forming an independent and complete cell 100.
[0068] In the above embodiment, the two battery cells 100 can be connected in parallel, such as... Figure 5 As shown; they can also be connected in series, such as Figure 6 As shown, this is to meet the power supply needs of different devices.
[0069] In some embodiments, the first electrode 10 is a negative electrode and the second electrode 20 is a positive electrode. To avoid direct contact between the positive electrode tab and the negative electrode, or between the negative electrode tab and the positive electrode, the second electrode 20 also includes a first ceramic insulating layer 24. The first ceramic insulating layer 24 is disposed on the side of the second electrode 21 near the second electrode tab 23. Thus, when the first electrode 10 and the second electrode 20 are stacked by the diaphragm 30, the first ceramic insulating layer 24 can act as an insulating barrier when the electrode tab area exceeds the coverage of the diaphragm 30, preventing direct contact between the positive electrode tab and the negative electrode or between the negative electrode tab and the positive electrode, thereby avoiding external short circuits.
[0070] In other embodiments, the first ceramic insulating layer 24 may also be disposed on the side of the first sub-electrode 11 near the first tab 13. Its function is also to act as an insulating barrier when the tab area exceeds the coverage of the diaphragm 30, preventing the positive tab from directly contacting the negative tab or the negative tab from directly contacting the positive tab, thereby avoiding external short circuits.
[0071] In addition, the first ceramic insulating layer 24 can also suppress edge wrinkles during electrode rolling or charge / discharge expansion, reducing internal short circuits caused by deformation.
[0072] In some embodiments, the first tab 13 and the second tab 23 are located on the same side of the cell 100. In this case, the first ceramic insulating layer 24 on the two second sub-electrodes 21 are also located on the same side. After stacking, the first ceramic insulating layer 24 can prevent the positive tab from directly contacting the negative tab or the negative tab from directly contacting the positive tab. Figure 2 and Figure 3 As shown.
[0073] In some embodiments, the first sub-electrode 11 includes a first current collector and a first active material layer. Along the first direction X, adjacent first current collectors have the same electrode polarity. The first current collector is a negative current collector, preferably a copper current collector. The first active material layer is coated on the surface of the first current collector and is a carbon substrate or a silicon substrate. The first tab 13 is a negative tab and is electrically connected to the first current collector. Similarly, the second sub-electrode 21 includes a second current collector and a second active material layer. Along the first direction X, adjacent second current collectors have the same electrode polarity. The second current collector is a positive current collector, preferably an aluminum current collector. The second active material layer is coated on the surface of the second current collector and is any one of lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide. The second tab 23 is a positive tab. It is electrically connected to the second current collector; thus, due to the insulating effect of the insulating layer, the two adjacent cell units 100 do not interfere with each other. For this reason, the first active material layers coated on the two adjacent first sub-electrodes 11 can be the same or different. For example, both first sub-electrodes 11 use carbon substrate as the first active material layer, or one uses carbon substrate as the first active material layer and the other uses silicon substrate as the first active material layer. Similarly, the second active material layers coated on the two adjacent second sub-electrodes 21 can be the same or different. For example, both second sub-electrodes 21 use lithium cobalt oxide as the second active material layer, or one uses lithium cobalt oxide as the second active material layer and the other uses ternary lithium as the second active material layer. In this way, cell units 100 with the same or different properties can be formed, thereby meeting the needs of different scenarios and devices.
[0074] Example 2
[0075] The difference between this embodiment and Embodiment 1 is that:
[0076] like Figures 7-9 As shown, in this embodiment, along the first direction X, the first electrode 10 includes three first sub-electrodes 11. The three first sub-electrodes 11 have the same electrode polarity, all being negative sub-electrodes. Each of the three first sub-electrodes 11 is provided with a first tab 13, which is a negative tab. Figure 7 As shown; the second electrode 20 includes three second sub-electrodes 21, all three second sub-electrodes 21 having the same electrode polarity, all being positive sub-electrodes. Each of the three second sub-electrodes 21 is provided with a second electrode tab 23, which is a positive electrode tab, as shown. Figure 8 As shown; whereby, after stacking the first electrode 10, the diaphragm 30, and the second electrode 20, due to the insulating effect of the first insulating layer 12 and the second insulating layer 22, three battery cells 100 can be formed after stacking, as shown. Figure 9As shown; similarly, each cell 100 includes a negative electrode plate and a positive electrode plate, with the separator 30 located between the negative electrode plate and the positive electrode plate, and each cell 100 includes a negative electrode tab and a positive electrode tab, thus forming an independent and complete cell 100.
[0077] In the above embodiment, the three battery cells 100 can be connected in parallel, such as... Figure 5 As shown; they can also be connected in series, such as Figure 6 As shown, this is to meet the power supply needs of different devices.
[0078] In other embodiments, the number of the first sub-electrode 11 and the second sub-electrode 21 is equal. The number of the first sub-electrode 11 can also be four, five, six, ..., ten, twenty or even more, which is not limited here. The arrangement of the first sub-electrode 11 and the second sub-electrode 21 refers to the above embodiments, which have at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.
[0079] Example 3
[0080] The difference between this embodiment and Embodiment 1 is that:
[0081] like Figures 10-12 As shown, in this embodiment, along the first direction X, the first electrode 10 includes two first sub-electrodes 11, and a first tab 13 is disposed on both sides of the first electrode 10 along the first direction X, and the first tab 13 is connected to the first sub-electrodes 11; similarly, along the first direction X, the second electrode 20 includes two second sub-electrodes 21, and a second tab 23 is disposed on both sides of the second electrode 20 along the first direction X, and a first ceramic insulating layer 24 is disposed on the side of the second sub-electrodes 21 near the second tab 23, that is, the first ceramic insulating layer 24 is also disposed on both sides of the second electrode 20 along the first direction X. When the first electrode 10 and the second electrode 20 are stacked, the positive and negative tabs of each group of battery cells 100 are located at the side ends, as shown. Figure 12 As shown, this is to meet the power supply needs of different devices.
[0082] Example 4
[0083] The difference between this embodiment and Embodiment 1 is that:
[0084] In this embodiment, along the first direction X, the electrode polarities of two adjacent first sub-electrodes 11 are opposite, and the electrode polarities of two adjacent second sub-electrodes 21 are opposite; specifically, the electrode polarities of two adjacent first current collectors are opposite, and the electrode polarities of two adjacent second current collectors are opposite.
[0085] Specifically, such as Figures 13-15As shown, along the first direction X, the first electrode 10 includes a first negative electrode 11a and a first positive electrode 11b, with a first insulating layer 12 between the first negative electrode 11a and the first positive electrode 11b. The first electrode tab 13 includes a first negative electrode tab 13a and a first positive electrode tab 13b, with the first negative electrode tab 13a connected to the first negative electrode 11a and the first positive electrode tab 13b connected to the first positive electrode 11b. The first electrode 10 also includes a second ceramic insulating layer 14, which is disposed on the side of the first positive electrode 11b near the first positive electrode tab 13b. Along the first direction X, the second electrode 20 includes a second positive electrode 21a and a second negative electrode 21b, with the second positive electrode 21a and the second negative electrode 21b... A second insulating layer 22 is provided, and the second electrode tab 23 includes a second positive electrode tab 23a and a second negative electrode tab 23b. The second positive electrode tab 23a is connected to the second positive electrode plate 21a, and the second negative electrode tab 23b is connected to the second negative electrode plate 21b. The first ceramic insulating layer 24 is provided on the side of the second positive electrode plate 21a close to the second positive electrode tab 23a. Thus, when the first electrode plate 10 and the second electrode plate 20 are stacked through the separator 30, along the second direction Y, the first negative electrode plate 11a and the second positive electrode plate 21a form a set of battery cell 100, and the first positive electrode plate 11b and the second negative electrode plate 21b form another set of battery cell 100, thereby realizing the simultaneous formation of two battery cell 100 in one stacking, improving the battery capacity and charge / discharge capability.
[0086] In the above embodiments, both the first negative electrode 11a and the second negative electrode 21b include a negative current collector and a negative active material layer. The negative current collector is preferably a copper current collector, and the negative active material layer is coated on the surface of the negative current collector. The negative active material layer is a carbon substrate or a silicon substrate. Both the first positive electrode 11b and the second positive electrode 21a include a positive current collector and a positive active material layer. The positive current collector is preferably an aluminum current collector, and the positive active material layer is coated on the surface of the positive current collector. The positive active material layer is any one of lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide.
[0087] Example 5
[0088] The difference between this embodiment and embodiment 4 is that:
[0089] like Figures 16-18As shown, in this embodiment, along the first direction X, the first negative electrode tab 13a is disposed on the side of the first negative electrode plate 11a away from the first positive electrode plate 11b, the first positive electrode tab 13b is disposed on the side of the first positive electrode plate 11b away from the first negative electrode plate 11a, and the second ceramic insulating layer 14 is disposed on the side of the first positive electrode plate 11b away from the first negative electrode plate 11a; similarly, the second positive electrode tab 23a is disposed on the side of the second positive electrode plate 21a away from the second negative electrode plate 21b, the first ceramic insulating layer 24 is disposed on the side of the second positive electrode plate 21a away from the second negative electrode plate 21b, and the second negative electrode tab 23b is disposed on the side of the second negative electrode plate 21b away from the second positive electrode plate 21a. After the first electrode plate 10 and the second electrode plate 20 are stacked through the separator 30, two battery cells 100 can be formed simultaneously, which improves the battery capacity and charge / discharge capability.
[0090] Example 6
[0091] The difference between this embodiment and Embodiment 1 is that:
[0092] like Figures 19-21 As shown, in this embodiment, along the first direction X, the first electrode 10 includes two first sub-electrodes 11, the two first sub-electrodes 11 having different sizes or arrangements. The second electrode 20 includes two second sub-electrodes 21, the two second sub-electrodes 21 having different sizes or arrangements. However, in the second direction Y, the corresponding first sub-electrodes 11 and second sub-electrodes 21 have the same size, thus satisfying different structural arrangement requirements.
[0093] In summary, in this invention, at least two first sub-electrodes 11 are connected by a first insulating layer 12 to form a first electrode 10, and at least two second sub-electrodes 21 are connected by a first insulating layer 12 to form a second electrode 20. Thus, when the first electrode 10, the second electrode 20, and the separator 30 are stacked along the second direction Y, a corresponding set of first sub-electrodes 11, second electrode 21, and separator along the second direction Y forms a single cell 100. When there are two or more first sub-electrodes 11 and second sub-electrodes 21, two or more single cell 100s can be formed, thereby achieving a single-pass... Stacking simultaneously forms at least two battery cells 100, improving battery capacity and charge / discharge capability. Furthermore, by stacking the first electrode 10 and the second electrode 20 of this invention, at least two battery cells 100 can be formed, eliminating the need for redundant components and improving processing efficiency. The stacking method also reduces the space occupied by the battery cells, resulting in a thinner and lighter battery. Moreover, different active materials can be used on the electrodes to form different types of battery cells 100, meeting the application requirements of different devices or scenarios. The dimensions of two adjacent sub-electrodes can also be different to meet different structural arrangement requirements.
[0094] Example 7
[0095] This utility model also provides a battery, including a casing and a battery cell from any of the above embodiments, with the casing covering the battery cell. The specific structure of the battery cell is as described in the above embodiments. Since this battery adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated here.
[0096] A battery is a device that converts chemical energy into electrical energy. It contains an electrolyte solution and metal electrodes, and is housed in a cup, tank, or other container (such as a shell) or a portion of a composite container to generate an electric current. Batteries have positive and negative electrodes. With technological advancements, the term "battery" now broadly refers to any small device capable of generating electrical energy, such as a solar cell. The main performance parameters of a battery include electromotive force, capacity, specific energy, and resistance. Battery principle: In a chemical battery, chemical energy is directly converted into electrical energy through spontaneous oxidation and reduction reactions within the battery. These reactions occur at the two electrodes.
[0097] Taking lithium batteries as an example, the positive electrode current collector can be made of aluminum, and the positive electrode active material layer can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode current collector can be made of copper, and the negative electrode active material layer can be made of carbon-based materials (such as graphite), silicon-based materials, or alloy materials, etc. The separator can be made of PP (polypropylene) or PE (polyethylene), etc. The electrolyte is a material with good ionic conductivity, such as aqueous solutions of acids, alkalis, and salts, organic or inorganic non-aqueous solutions, molten salts, or solid electrolytes, etc.
[0098] In other embodiments, the battery can be a rechargeable battery, also known as a rechargeable battery or accumulator, which is a battery that can be recharged after being discharged to reactivate the active materials and continue to be used. Utilizing the reversibility of chemical reactions, a new battery can be constructed; that is, after a chemical reaction converts into electrical energy, the electrical energy can be used to repair the chemical system, and then the chemical reaction can be converted back into electrical energy. Therefore, it is called a rechargeable battery.
[0099] Example 8
[0100] This utility model also proposes an electrical device, which includes the battery of Embodiment 7. The specific structure of the battery is as described in the above embodiments. Since this electrical device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.
[0101] The electrical equipment can include headphones, vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This embodiment does not impose special limitations on the above-mentioned electrical equipment.
[0102] The above description is merely a preferred embodiment of this utility model. It should be noted that, for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this utility model, and these improvements and substitutions should also be considered within the protection scope of this utility model. The basic principles, main features, and advantages of this utility model have been shown and described above. For those skilled in the art, it is obvious that this utility model is not limited to the details of the above preferred embodiments. The embodiments should be considered exemplary and non-limiting. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included within this utility model.
[0103] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A battery cell having intersecting first and second directions, characterized in that, It includes a first electrode and a second electrode spaced apart along the second direction, with a diaphragm provided between the first electrode and the second electrode; Along the first direction, the first electrode includes at least two first sub-electrodes, a first insulating layer is provided between two adjacent first sub-electrodes, and each first sub-electrode is provided with a first electrode tab; Along the first direction, the second electrode includes at least two second sub-electrodes, a second insulating layer is provided between two adjacent second sub-electrodes, and each second sub-electrode is provided with a second electrode tab; Wherein, the orthographic projection of the first sub-electrode along the second direction overlaps with the orthographic projection of the second sub-electrode along the second direction, and along the second direction, the electrode polarities of the first sub-electrode and the second sub-electrode are opposite, so that the first electrode, the second electrode and the separator form at least two battery cells.
2. The battery cell according to claim 1, characterized in that, Along the first direction, the electrode polarities of two adjacent first sub-electrodes are the same, and the electrode polarities of two adjacent second sub-electrodes are the same.
3. A battery cell according to claim 1, characterized in that, Along the first direction, the electrode polarities of two adjacent first sub-electrodes are opposite, and the electrode polarities of two adjacent second sub-electrodes are opposite.
4. A battery cell according to claim 1, characterized in that, Two adjacent battery cells are connected in parallel or in series.
5. A battery cell according to claim 1, characterized in that, The second electrode also includes: A first ceramic insulating layer is disposed on the side of the second sub-electrode near the second electrode tab; And / or, the first ceramic insulating layer is disposed on the side of the first sub-electrode near the first electrode tab.
6. A battery cell according to claim 1, characterized in that, The first sub-electrode includes a first current collector and a first active material layer, the first active material layer is coated on the surface of the first current collector, and the first electrode tab is electrically connected to the first current collector; The second sub-electrode includes a second current collector and a second active material layer, the second active material layer being coated on the surface of the second current collector, and the second electrode tab being electrically connected to the second current collector.
7. A battery cell according to claim 6, characterized in that, Along the first direction, the electrodes of two adjacent first current collectors have the same polarity; The materials of the first active material layers coated on the two adjacent first current collectors are the same; Alternatively, the materials of the first active material layers coated on two adjacent first current collectors may be different.
8. A battery cell according to claim 6, characterized in that, Along the first direction, the electrodes of two adjacent second current collectors have the same polarity; The materials of the second active material layers coated on two adjacent second current collectors are the same; Alternatively, the materials of the second active material layers coated on two adjacent second current collectors may be different.
9. A battery cell according to claim 6, characterized in that, Along the first direction, the electrode polarities of two adjacent first current collectors are opposite; And, the electrodes of the two adjacent second current collectors have opposite polarities.
10. A battery, characterized in that, It includes a housing and a battery cell as described in any one of claims 1-9, wherein the housing covers the battery cell.