Battery and electric equipment
By setting a separator layer between the electrode connector and the recessed part, the problem of insufficient connection stability between the battery electrode and the casing is solved, achieving higher connection stability and corrosion resistance, and extending battery life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2026-04-03
AI Technical Summary
The connection between the battery's tabs and the casing is not stable enough, making it prone to corrosion due to direct contact.
By setting a separator layer between the tab connector and the recessed part, the direct contact points are reduced. The separator layer is designed with materials that match or are similar to those of the connector and the recessed part to prevent corrosion and improve connection stability.
It effectively prevents corrosion from direct contact between the tab connector and the inner recess, improves the connection stability between the tab and the casing, and extends the battery life.
Smart Images
Figure CN224082633U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery technology, specifically to batteries and electrical equipment. Background Technology
[0002] Batteries are widely used in energy storage systems, transportation, and consumer electronics. The battery terminals and the battery casing need to be connected together by a connecting structure.
[0003] In related technologies, the stability of the connection between the battery tabs and the battery casing still needs to be improved. Utility Model Content
[0004] The embodiments of this application provide a battery and an electrical device that can improve the technical problem of insufficient stability in the connection between the battery tabs and the battery casing.
[0005] In a first aspect, embodiments of this application provide a battery, comprising:
[0006] A housing having a mounting cavity, the housing having a recessed portion that protrudes into the mounting cavity;
[0007] A connector includes an electrode connector and a tab connector, the electrode connector being connected to the recessed portion, the tab connector connecting the electrode connector and the tab of the battery, the tab connector including a first connecting surface facing the recessed portion;
[0008] A separating layer is connected to the first connecting surface, the first connecting surface being used to separate the separating layer from at least one of the electrode connector and the recessed portion, the ratio of the contact area of the separating layer and the first connecting surface to the area of the first connecting surface is a, 0.2≤a≤0.85.
[0009] In one embodiment, the electrode connector includes a first connecting segment and a second connecting segment, the first connecting segment being connected to the tab connector, and the second connecting segment being connected to the first connecting segment and the recessed portion.
[0010] In one embodiment, along the axial direction of the housing, the orthographic projection of the second connecting segment onto the inner bottom wall of the housing coincides with the orthographic projection of the partition layer onto the inner bottom wall of the housing.
[0011] In one embodiment, along the axial direction of the housing, the orthographic projection of the second connecting segment onto the inner bottom wall of the housing is within the orthographic projection of the partition layer onto the inner bottom wall of the housing.
[0012] In one embodiment, the separator layer and the second connecting segment are made of the same material.
[0013] In one embodiment, along the axial direction of the housing, the orthographic projection of the recessed portion onto the inner bottom wall of the housing coincides with the orthographic projection of the partition layer onto the inner bottom wall of the housing.
[0014] In one embodiment, along the axial direction of the housing, the projection of the recessed portion onto the inner bottom wall of the housing is within the projection of the partition layer onto the inner bottom wall of the housing.
[0015] In one embodiment, the separating layer is made of the same material as the recessed portion.
[0016] In one embodiment, the battery further includes a connecting portion that connects the electrode connector and the recessed portion, the connecting portion being made of the same material as the recessed portion.
[0017] In one embodiment, the connector includes a first surface and a second surface, the first surface being connected to the separator layer, and the first surface being connected to the second surface via a second connecting surface, wherein...
[0018] The second connecting surface is perpendicular to the first surface and / or the second surface; or,
[0019] The second connecting surface is inclined relative to the first surface, and / or the second connecting surface is inclined relative to the second surface.
[0020] In one embodiment, the battery further includes a cover plate, and the connector is electrically connected to the cover plate.
[0021] In one embodiment, the thickness of the separator layer is H1, wherein 1 μm ≤ H1 ≤ 10 μm; and / or,
[0022] Along the axial direction of the housing, the thickness of the partition layer is H1, and the thickness of the electrode connector is H2, wherein 0.05 ≤ H1 / (H1+H2) ≤ 0.7; and / or,
[0023] The connector has a through hole along the axial direction of the housing. The area of the through hole projected onto the inner bottom wall of the housing is S1, and the area of the connector projected onto the inner bottom wall of the housing is S2, where 0.2≤S1 / S2≤0.85.
[0024] In one embodiment, the tab connector includes a sidewall surface and a first surface and a second surface disposed opposite to each other. The first surface is located on the side of the tab connector facing the tab, and the second surface is located on the side of the tab connector away from the tab. The separator layer covers a portion of the first surface.
[0025] Secondly, embodiments of this application provide an electrical device including the battery described above.
[0026] The beneficial effects of the embodiments of this application are as follows:
[0027] In the embodiments of this application, the electrode connector and the tab connector are separated by a separator, which can reduce the contact points between the electrode connector and the tab connector, avoid direct contact between the side of the tab connector facing the inward portion and the electrode connector, thus preventing corrosion, and improve the connection stability between the tab connector and the electrode connector, thereby improving the connection stability between the tab and the housing.
[0028] By separating the inner recess and the tab connector with a separator, direct contact between the tab connector and the inner recess can be avoided, which would lead to corrosion. This improves the structural stability of the tab connector, and in turn, improves the connection stability between the tab and the housing. Attached Figure Description
[0029] 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.
[0030] Figure 1 This is a schematic diagram of the battery structure provided in an embodiment of this application;
[0031] Figure 2 This is one of the partial structural schematic diagrams of a battery provided in an embodiment of this application;
[0032] Figure 3 This is a schematic diagram of the battery structure provided in an embodiment of this application, wherein the connector and the cover are electrically connected;
[0033] Figure 4 A second schematic diagram of a partial structure of a battery provided for an embodiment of this application;
[0034] Figure 5 The third schematic diagram of a partial structure of a battery provided for an embodiment of this application;
[0035] Figure 6 The fourth schematic diagram of a partial structure of a battery provided for an embodiment of this application. Detailed Implementation
[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.
[0037] The following is combined Figures 1 to 6 This application describes the battery and electrical device.
[0038] According to the embodiments of the first aspect of this application, see [link / reference]. Figure 1 and Figure 2 The battery includes a connector 1, a casing 4, and a separator 5.
[0039] The housing 4 has a mounting cavity 41 and an inner recess 42 that protrudes into the mounting cavity 41. The connector 1 includes an electrode connector 11 and a tab connector 12. The electrode connector 11 is connected to the inner recess 42, and the tab connector 12 connects the electrode connector 11 and the tab of the battery. The tab connector 12 includes a first connecting surface facing the inner recess 42. A separator layer 5 is connected to the first connecting surface. The first connecting surface is used to separate from at least one of the electrode connector 11 and the inner recess 42 by the separator layer 5. The ratio of the contact area of the separator layer 5 and the first connecting surface to the area of the first connecting surface is a, where 0.2 ≤ a ≤ 0.85.
[0040] According to the battery of the present application embodiment, the electrode connector 11 and the tab connector 12 are separated by a separator, which can reduce the contact position between the electrode connector 11 and the tab connector 12, avoid the tab connector 12 facing the inward portion 42 from directly contacting the electrode connector 11 and causing corrosion, improve the connection stability between the tab connector 12 and the electrode connector 11, and thus improve the connection stability between the tab and the housing 4.
[0041] By separating the inner recess 42 and the tab connector 12 with a separator, direct contact between the tab connector 12 and the inner recess 42 can be avoided, which would lead to corrosion. This improves the structural stability of the tab connector 12, and in turn, improves the connection stability between the tab and the housing 4.
[0042] It is understandable that the side of the separator 5 facing the first connecting surface is connected to the first connecting surface. The portion of the first connecting surface of the electrode connector 12 that is connected to the separator 5 can be separated from the electrode connector 11 and / or the recessed portion 42. That is to say, the ratio of the contact area between the separator 5 and the first connecting surface to the area of the first connecting surface is related to the separation effect. When the ratio of the contact area between the separator 5 and the first connecting surface to the area of the first connecting surface is less than 0.2, the separator 5 is unlikely to effectively separate at least one of the electrode connector 11 and the recessed portion 42 from the electrode connector. In component 12, when the ratio of the contact area between the separator layer 5 and the first connecting surface to the area of the first connecting surface is greater than 0.85, the coverage area of the separator layer 5 is too large, which may easily cause interference with other structures of the battery. Therefore, this application sets the ratio of the contact area between the separator layer 5 and the first connecting surface to the area of the first connecting surface to be greater than or equal to 0.2 and less than or equal to 0.85, to ensure that the first connecting surface is used to separate the separator layer 5 from at least one of the electrode connector 11 and the recessed portion 42, while effectively preventing the separator layer 5 from interfering with other structures of the battery.
[0043] In some examples, the separator layer 5 is, for example, a nickel layer. It should be noted that the material of the separator layer 5 is mainly determined by the material of the recessed portion 42 or the electrode connector 11, and is not specifically nickel.
[0044] For example, connector 1 is made of copper. After connector 1 is nickel-plated as a whole, it is cleaned by laser cleaning, mechanical polishing, chemical etching or any other suitable method to remove the non-nickel-plated areas.
[0045] In some examples, the separator layer 5 is connected to the tab connector 12, for example, by electroplating. It should be noted that the separator layer 5 can also be connected to the tab connector 12 by welding or other methods.
[0046] In some embodiments, see Figure 1 and Figure 2 The electrode connector 11 includes a first connecting section 111 and a second connecting section 112. The first connecting section 111 is connected to the tab connector 12, and the second connecting section 112 is connected to the first connecting section 111 and the recessed portion 42.
[0047] It is understandable that by dividing the electrode connector 11 into at least two sections and using the second connecting section 112 to connect the first connecting section 111 and the inner portion 42, the electrical connection between the electrode tab and the housing 4 can be achieved, resulting in a simple structure.
[0048] In some examples, the second end of the first connecting segment 111 protrudes or bends away from the first end of the first connecting segment 111 in a direction away from the tab connector 12.
[0049] It is understandable that the second end of the first connecting segment 111 protrudes or bends away from the tab connector 12, while the second connecting segment 112 is connected to the second end of the first connecting segment 111, thereby causing the second connecting segment 112 to protrude from the tab connector 12, which facilitates the connection between the second connecting segment 112 and the housing 4.
[0050] In some examples, the first end of the first connecting segment 111 is stacked on the tab connector 12.
[0051] Specifically, along the axial direction of the housing 4, the orthographic projection of the second connecting segment 112 on the inner bottom wall of the housing 4 coincides with the orthographic projection of the partition layer 5 on the inner bottom wall of the housing 4.
[0052] It is understandable that the orthographic projection of the second connecting segment 112 on the inner bottom wall of the housing 4 coincides with the orthographic projection of the partition layer 5 on the inner bottom wall of the housing 4. That is, along the axial direction of the housing 4, the partition layer 5 will be located between the second connecting segment 112 and the electrode tab connector 12. The partition layer 5 can prevent the second connecting segment 112 and the electrode tab connector 12 from contacting each other, thereby reducing the contact position between the electrode connector 11 and the electrode tab connector 12, avoiding direct contact between the side of the electrode tab connector 12 facing the inward portion 42 and the electrode connector 11, which would lead to corrosion, and improving the connection stability between the electrode tab connector 12 and the electrode connector 11, thereby improving the connection stability between the electrode tab and the housing 4.
[0053] Specifically, along the axial direction of the housing 4, the orthographic projection of the second connecting segment 112 on the inner bottom wall of the housing 4 is within the orthographic projection of the partition layer 5 on the inner bottom wall of the housing 4.
[0054] It is understandable that the orthographic projection of the second connecting segment 112 on the inner bottom wall of the housing 4 is within the orthographic projection of the partition layer 5 on the inner bottom wall of the housing 4. That is, along the axial direction of the housing 4, the partition layer 5 will be located between the second connecting segment 112 and the electrode tab connector 12. The partition layer 5 can prevent the second connecting segment 112 and the electrode tab connector 12 from contacting each other, thereby reducing the contact position between the electrode connector 11 and the electrode tab connector 12, avoiding direct contact between the side of the electrode tab connector 12 facing the inward portion 42 and the electrode connector 11, which would lead to corrosion, and improving the connection stability between the electrode tab connector 12 and the electrode connector 11, thereby improving the connection stability between the electrode tab and the housing 4.
[0055] In some embodiments, the partition layer 5 and the second connecting segment 112 are made of the same material.
[0056] It is understandable that by designing the material of the separator layer 5 and the second connecting segment 112 to be the same, even if the second connecting segment 112 and the separator layer 5 come into contact, corrosion of the separator layer 5 and the second connecting segment 112 can be effectively prevented. This is beneficial to improving the structural stability of the separator layer 5 and the second connecting segment 112, so that the separator layer 5 can stably separate the tab connector 12 and the second connecting segment 112, and the second connecting segment 112 can stably connect the first connecting segment 111 and the inner recess 42.
[0057] In some embodiments, along the axial direction of the housing 4, the orthographic projection of the recess 42 on the inner bottom wall of the housing 4 coincides with the orthographic projection of the partition layer 5 on the inner bottom wall of the housing 4.
[0058] It is understandable that the orthographic projection of the inner recess 42 onto the inner bottom wall of the housing 4 coincides with the orthographic projection of the partition layer 5 onto the inner bottom wall of the housing 4. That is, along the axial direction of the housing 4, the partition layer 5 will be located between the inner recess 42 and the tab connector 12. The partition layer 5 can prevent the inner recess 42 and the tab connector 12 from contacting each other, thereby reducing the contact points between the tab connector 12 and other components, avoiding direct contact between the side of the tab connector 12 facing the inner recess 42 and the inner recess 42, which would lead to corrosion, and improving the structural stability of the tab connector 12, thereby improving the connection stability between the tab and the housing 4.
[0059] In some embodiments, along the axial direction of the housing 4, the orthographic projection of the recess 42 on the inner bottom wall of the housing 4 lies within the orthographic projection of the partition layer 5 on the inner bottom wall of the housing 4.
[0060] It is understandable that the orthographic projection of the recessed portion 42 onto the inner bottom wall of the housing 4 lies within the orthographic projection of the partition layer 5 onto the inner bottom wall of the housing 4. In other words, along the axial direction of the housing 4, the partition layer 5 is located between the recessed portion 42 and the tab connector 12. The partition layer 5 can prevent the recessed portion 42 and the tab connector 12 from contacting each other, thereby reducing the contact points between the tab connector 12 and other components, preventing the side of the tab connector 12 facing the recessed portion 42 from directly contacting the recessed portion 42 and causing corrosion, improving the structural stability of the tab connector 12, and thus improving the connection stability between the tab and the housing 4.
[0061] In some embodiments, the partition layer 5 is made of the same material as the recessed portion 42.
[0062] It is understandable that by designing the materials of the separator layer 5 and the inner recess 42 to be the same, even if the inner recess 42 and the separator layer 5 come into contact, corrosion of the separator layer 5 and the inner recess 42 can be effectively prevented. This is beneficial to improving the structural stability of the separator layer 5 and the inner recess 42, so that the separator layer 5 can stably separate the tab connector 12 and the inner recess 42.
[0063] In some embodiments, see Figure 1 The battery also includes a connecting part 2, which connects the electrode connector 11 and the recessed part 42. The connecting part and the recessed part 42 are made of the same material.
[0064] It is understandable that by using the connecting part 2 to connect the electrode connector 11 and the inner recess 42, and since the connecting part 2 and the inner recess 42 are made of the same material, corrosion is not likely to occur at the connection between the connecting part 2 and the inner recess 42, thus ensuring the connection stability between the connecting part 2 and the inner recess 42, and enabling the connecting part 2 to stably connect the inner recess 42 and the electrode connector 11.
[0065] In some examples, the connecting part 2 is integrally formed with the electrode connector 11.
[0066] In some examples, the connector 2 is connected to the electrode connector 11 by snap-fit, welding or any other suitable means.
[0067] In some embodiments, see Figure 4 and Figure 5 The connector 1 includes a first surface 6 and a second surface 7. The first surface 6 is connected to a partition layer 5, and the first surface 6 is connected to the second surface 7 through a second connecting surface 8.
[0068] It is understandable that if the first surface 6 is connected to the partition layer 5, then the first surface 6 can be separated from at least one of the electrode connector 11 and the recessed portion 42 by the partition layer 5. The partition layer 5 can reduce the contact points between the electrode connector 11 and the first surface 6, avoid direct contact between the first surface 6 and the electrode connector 11 which would lead to corrosion, improve the connection stability between the tab connector 12 and the electrode connector 11, and thus improve the connection stability between the tab and the housing 4. It is also less likely to come into contact with the second surface 7, which does not have the partition layer 5; by separating the recessed portion 42 and the first surface 6 by the partition layer, direct contact between the first surface 6 and the recessed portion 42 which would lead to corrosion can be avoided, improving the structural stability of the tab connector 12, and thus improving the connection stability between the tab and the housing 4.
[0069] For details, please refer to Figure 4 The second connecting surface 8 is perpendicular to the first surface 6 and / or the second surface 7.
[0070] It is understandable that the second connecting surface 8 is perpendicular to the first surface 6 and / or the second surface 7, that is, along the axial direction of the housing 4, the first surface 6 and the second surface 7 are located at different heights, which can effectively increase the distance between the second surface 7 and the first surface 6, which is not covered by the partition layer 5.
[0071] In some examples, the vertical distance between the first surface 6 and the inner bottom wall of the housing 4 is greater than the vertical distance between the second surface 7 and the inner bottom wall of the housing 4. This increases the distance between the second surface 7 (which is not covered by the partition layer 5) and the recessed portion 42 and the electrode connector 11, thereby effectively preventing the second surface 7 from contacting the recessed portion 42 and / or the electrode connector 11.
[0072] For details, please refer to Figure 5 The second connecting surface 8 is inclined relative to the first surface 6.
[0073] It is understandable that the second connecting surface 8 is inclined relative to the first surface 6, making the connection structure between the first surface 6 and the second surface 7 an inclined structure, which facilitates the molding of the connector 1. At the same time, the inclined second connecting surface 8 can effectively increase the radial distance between the first surface 6 and the second surface 7, that is, it can effectively increase the distance between the second surface 7, which is not covered by the separator layer 5, and the electrode connector 11 and / or the recessed part 42, preventing the second surface 7 from contacting the electrode connector 11 and / or the recessed part 42.
[0074] For details, please refer to Figure 5 The second connecting surface 8 is inclined relative to the second surface 7.
[0075] It is understandable that the second connecting surface 8 is inclined relative to the second surface 7, making the connection structure between the first surface 6 and the second surface 7 an inclined structure, which facilitates the molding of the connector 1. At the same time, the inclined second connecting surface 8 can effectively increase the radial distance between the first surface 6 and the second surface 7, that is, it can effectively increase the distance between the second surface 7, which is not covered by the separator layer 5, and the electrode connector 11 and / or the recessed portion 42, preventing the second surface 7 from contacting the electrode connector 11 and / or the recessed portion 42.
[0076] In some examples, the first surface 6 is located between the second connecting surface 8 and the inner wall surface of the housing 4, that is, the first surface 6 is closer to the recessed portion 42 than the second surface 7.
[0077] In some embodiments, see Figure 3 The battery also includes a cover plate 9, and the connector 1 is electrically connected to the cover plate 9.
[0078] Understandably, by using connector 1 to connect the casing 4 and the electrode tabs, the battery can operate normally, and connector 1 is also energized. By electrically connecting connector 1 and cover plate 9, cover plate 9 is also energized, which effectively prevents corrosion of cover plate 9, extends its service life, and improves battery stability.
[0079] In some embodiments, see Figure 6 The thickness of the separator layer 5 is H1, where 1μm≤H1≤10μm.
[0080] Understandably, when the thickness of the separator layer 5 is less than 1 μm, it is prone to damage, making it difficult to effectively separate the tab connector 12 from the recessed portion 42, and also difficult to effectively separate the tab connector 12 from the electrode connector 11. When the thickness of the separator layer 5 is greater than 10 μm, its large thickness can significantly affect the size of the battery. Therefore, this application sets the thickness of the separator layer 5 between 1 μm and 10 μm, which can effectively separate at least one of the electrode connector 11 and the recessed portion 42 from the tab connector 12, while also reducing the impact on the size of the battery.
[0081] In some embodiments, the connector 1 is formed with a through hole 13. Along the axial direction of the housing 4, the area of the through hole 13 projected onto the inner bottom wall of the housing 4 is S1, and the area of the connector 1 projected onto the inner bottom wall of the housing 4 is S2, wherein 0.2≤S1 / S2≤0.85.
[0082] It is understandable that the through hole 13 is formed in the connector 1 to facilitate the flow of electrolyte.
[0083] Understandably, if the ratio of S1 to S2 is less than 0.2, the through hole 13 may be too small, which is not conducive to the flow of electrolyte; if the ratio of S1 to S2 is greater than 0.85, the through hole 13 may be too large, which may easily affect the structural stability of connector 1. Therefore, this application sets the ratio of S1 to S2 between 0.2 and 0.85, which ensures that the electrolyte can flow smoothly while reducing the impact on the structural stability of connector 1.
[0084] In some embodiments, see Figure 6 Along the axial direction of the housing 4, the thickness of the partition layer 5 is H1, and the thickness of the electrode connector 12 is H2, wherein 0.05≤H1 / (H1+H2)≤0.7.
[0085] It is understandable that the total thickness of the separator layer 5 plus the tab connector 12 is H1 + H2. If the ratio of the thickness of the separator layer 5 to the total thickness is less than 0.05, it indicates that the thickness of the separator layer 5 is too low, making it prone to damage and unable to provide effective separation. If the ratio of the thickness of the separator layer 5 to the total thickness is greater than 0.7, the thickness of the separator layer 5 is too large, which can significantly affect the size of the battery. Therefore, this application sets the ratio of the thickness of the separator layer 5 to the total thickness between 0.05 and 0.7, which can effectively separate at least one of the electrode connector 11 and the recessed portion 42 from the tab connector 12, and also reduce the impact on the size of the battery.
[0086] In some embodiments, see Figure 6The tab connector 12 includes a side wall surface and a first surface 121 and a second surface 122 disposed opposite to each other. The first surface 121 is located on the side of the tab connector 12 facing the tab, and the second surface 122 is located on the side of the tab connector 12 away from the tab. The separator layer 5 is wrapped around a portion of the first surface 121.
[0087] It is understandable that the partition layer 5 wraps around part of the first surface 121 of the tab connector 12, which increases the degree of wrapping of the tab connector 12 by the partition layer 5, so that the partition layer 5 can protect the tab connector 12, making the tab connector 12 less susceptible to oxidation and corrosion, ensuring the structural stability of the tab connector 12, preventing the electrical performance of the tab connector 12 from deteriorating, and improving the structural stability of the current collector.
[0088] According to an embodiment of the second aspect of this application, the electrical device includes the battery described above.
[0089] According to the embodiments of this application, the electrical equipment separates the electrode connector 11 and the tab connector 12 by a separator, which can reduce the contact position between the electrode connector 11 and the tab connector 12, avoid the tab connector 12 facing the inward portion 42 from directly contacting the electrode connector 11 and causing corrosion, improve the connection stability between the tab connector 12 and the electrode connector 11, and thus improve the connection stability between the tab and the housing 4.
[0090] By separating the inner recess 42 and the tab connector 12 with a separator, direct contact between the tab connector 12 and the inner recess 42 can be avoided, which would lead to corrosion. This improves the structural stability of the tab connector 12, and in turn, improves the connection stability between the tab and the housing 4.
[0091] It should be noted that electrical equipment can be vehicles, aircraft, or household appliances. It is important to note that the above examples are merely illustrative and do not impose any specific limitations on the types of electrical equipment used.
[0092] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.
Claims
1. A battery, characterized in that, include: A housing having a mounting cavity, the housing having a recessed portion that protrudes into the mounting cavity; A connector includes an electrode connector and a tab connector, the electrode connector being connected to the recessed portion, the tab connector connecting the electrode connector and the tab of the battery, the tab connector including a first connecting surface facing the recessed portion; A separating layer is connected to the first connecting surface, the first connecting surface being used to separate the separating layer from at least one of the electrode connector and the recessed portion, the ratio of the contact area of the separating layer and the first connecting surface to the area of the first connecting surface is a, 0.2≤a≤0.
85.
2. The battery according to claim 1, characterized in that, The electrode connector includes a first connecting segment and a second connecting segment. The first connecting segment is connected to the tab connector, and the second connecting segment connects the first connecting segment and the recessed portion.
3. The battery according to claim 2, characterized in that, Along the axial direction of the housing, the orthographic projection of the second connecting segment on the inner bottom wall of the housing coincides with the orthographic projection of the partition layer on the inner bottom wall of the housing.
4. The battery according to claim 2, characterized in that, Along the axial direction of the housing, the orthographic projection of the second connecting segment on the inner bottom wall of the housing is within the orthographic projection of the partition layer on the inner bottom wall of the housing.
5. The battery according to claim 2, characterized in that, The separator layer and the second connecting segment are made of the same material.
6. The battery according to claim 1, characterized in that, Along the axial direction of the housing, the orthographic projection of the recessed portion onto the inner bottom wall of the housing coincides with the orthographic projection of the partition layer onto the inner bottom wall of the housing.
7. The battery according to claim 1, characterized in that, Along the axial direction of the housing, the orthographic projection of the recessed portion onto the inner bottom wall of the housing is within the orthographic projection of the partition layer onto the inner bottom wall of the housing.
8. The battery according to claim 6 or 7, characterized in that, The separating layer is made of the same material as the recessed portion.
9. The battery according to any one of claims 1 to 7, characterized in that, The battery also includes a connecting portion that connects the electrode connector and the recessed portion, and the connecting portion and the recessed portion are made of the same material.
10. The battery according to any one of claims 1 to 7, characterized in that, The connector includes a first surface and a second surface, the first surface being connected to the partition layer, and the first surface being connected to the second surface via a second connecting surface. The second connecting surface is perpendicular to the first surface and / or the second surface; or, The second connecting surface is inclined relative to the first surface, and / or the second connecting surface is inclined relative to the second surface.
11. The battery according to any one of claims 1 to 7, characterized in that, The battery also includes a cover plate, and the connector is electrically connected to the cover plate.
12. The battery according to any one of claims 1 to 7, characterized in that, The thickness of the separator layer is H1, where 1μm ≤ H1 ≤ 10μm; and / or, Along the axial direction of the housing, the thickness of the partition layer is H1, and the thickness of the electrode connector is H2, wherein 0.05 ≤ H1 / (H1+H2) ≤ 0.7; and / or, The connector has a through hole along the axial direction of the housing. The area of the through hole projected onto the inner bottom wall of the housing is S1, and the area of the connector projected onto the inner bottom wall of the housing is S2, where 0.2≤S1 / S2≤0.
85.
13. The battery according to any one of claims 1 to 7, characterized in that, The tab connector includes a sidewall surface and a first surface and a second surface disposed opposite to each other. The first surface is located on the side of the tab connector facing the tab, and the second surface is located on the side of the tab connector away from the tab. The separator layer covers a portion of the first surface.
14. An electrical appliance, characterized in that, Includes the battery as described in any one of claims 1 to 13.