Battery case, battery, and electric device

Abstract

The application discloses a battery shell, a battery and an electric device, and belongs to the technical field of batteries. The battery shell comprises a main body part and an opening part. The main body part is formed with a mounting cavity. The opening part is connected with the main body part. The opening part is formed with a mounting opening which is communicated with the mounting cavity, so that a winding core can enter the mounting cavity from the mounting opening. With the opening part being away from the main body part, the cross-sectional area of the mounting opening has a trend of increasing. According to the technical scheme, the winding core and the edge of the battery shell are not easy to be scratched.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to a battery casing, a battery, and an electrical device. Background Technology

[0002] A complete battery manufacturing process typically includes three stages: electrode manufacturing, battery assembly, and post-processing. Battery assembly is the most important stage in battery manufacturing. Among these stages, placing the wound cores into the casing is an indispensable action (referred to as the "casing process"). In industry, automated equipment is used for the casing process. Automated casing can meet the efficiency requirements of mass-produced batteries, as well as the requirements for the stability and consistency of battery performance.

[0003] In related technologies, during the process of placing the core into the shell, the core is prone to rubbing against the edge of the shell, causing wrinkles on the surface of the core, or even damage to the surface of the core. Utility Model Content

[0004] This application provides a battery casing, a battery, and an electrical device to at least partially solve the above-mentioned technical problems.

[0005] To achieve the above objectives, according to a first aspect of this application, a battery casing is provided, comprising: a main body portion having a mounting cavity; and An opening is connected to the main body, and the opening has a mounting port that communicates with the mounting cavity, so that the winding core can enter the mounting cavity from the mounting port; As the opening moves away from the main body, the cross-sectional area of ​​the mounting port tends to increase.

[0006] In the battery casing of this application embodiment, during the casing insertion process, the winding core is inserted into the mounting cavity through the mounting opening. As the opening moves away from the main body, the cross-sectional area of ​​the mounting opening tends to increase. This prevents the winding core from easily contacting the wall of the opening during insertion into the mounting cavity, thus reducing the likelihood of scratches between the winding core and the edge of the battery casing.

[0007] Optionally, the thickness of the opening decreases as it moves away from the main body.

[0008] In other words, by reducing the thickness of the opening, the purpose of widening is achieved, thereby making it easier for the core to enter the mounting cavity.

[0009] Optionally, the thickness of the main body portion can be in the range of 0.5mm-10.0mm.

[0010] Optionally, the opening includes a first connecting portion and a second connecting portion, the second connecting portion being connected between the first connecting portion and the main body portion, and the cross-section of the second connecting portion facing the mounting opening is arc-shaped.

[0011] The inner side of the second connecting part (the side of the second connecting part facing the mounting port) is designed as an arc-shaped structure, which makes the connection between the first connecting part and the main body part smoother and less likely to scratch the core.

[0012] Optionally, the arc shape is a circular arc.

[0013] The rounded shape helps maintain smoothness and reduces the probability of the core scraping when entering the casing.

[0014] Optionally, the value range of the central angle corresponding to the arc is 30°-75°.

[0015] Optionally, the first connecting portion includes an inner surface and an outer surface disposed opposite to each other, and the distance between the inner surface and the outer surface gradually decreases as the first connecting portion moves away from the main body portion.

[0016] Optionally, the angle between the inner surface and the outer surface can be in the range of 30°-75°.

[0017] Optionally, the battery casing includes two openings, which are respectively connected to opposite ends of the main body.

[0018] According to a second aspect of this application, a battery is provided, comprising a winding core and the aforementioned battery casing, wherein the winding core is disposed within the battery casing.

[0019] According to a third aspect of this application, an electrical device is also provided, including the battery casing or the battery described above.

[0020] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description 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 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.

[0021] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0022] Figure 1This is a schematic diagram of the structure of a battery casing provided in an exemplary embodiment of this disclosure; Figure 2 These are schematic diagrams of the battery casing provided in the exemplary embodiments of this disclosure from different perspectives; Figure 3 yes Figure 2 A cross-sectional view along the AA direction in Figure (a); Figure 4 yes Figure 3 An enlarged schematic diagram of section M in the middle; Figure 5 yes Figure 4 An enlarged schematic diagram of part P in the middle.

[0023] Figure 6 This is a schematic diagram of the structure of the battery casing provided in other exemplary embodiments of this disclosure; Figure 7 This is a block diagram of an electrical device provided in other exemplary embodiments of this disclosure.

[0024] Explanation of reference numerals in the attached figures: 1. Battery casing; 11. Main body; 111. Mounting cavity; 12. Opening; 121. Mounting port; 122. First connecting part; 1221. Inner surface; 1223. Outer surface; 123. Second connecting part; 2. Winding core; 3. Battery; 4. Electrical equipment. Detailed Implementation

[0025] 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 them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0026] A complete battery manufacturing process typically includes three stages: electrode manufacturing, battery assembly, and post-processing. Battery assembly is the most crucial stage in battery manufacturing. Among these stages, placing the wound core into the casing is an indispensable step (referred to as the "casing process"). In industry, automated equipment is used for this casing process. Automated casing can meet the efficiency requirements of mass-produced batteries and also satisfy the requirements for battery performance stability and consistency. In related technologies, during the process of placing the wound core into the casing, the core is prone to rubbing against the edge of the casing, causing wrinkles on the core surface, or even damage to the core surface. This can lead to a short circuit between the positive and negative electrodes of the core, causing thermal runaway, fire, and explosion.

[0027] Please combine Figure 1 and Figure 2 This application provides a battery casing 1 to solve the problem of the core and casing edges rubbing against each other during the core insertion process in the prior art, thereby improving battery safety.

[0028] This application provides a battery casing 1, which includes a main body 11 and an opening 12. The main body 11 forms a mounting cavity 111. The opening 12 is connected to the main body 11 and has a mounting port 121 communicating with the mounting cavity 111, so that the core 2 can enter the mounting cavity 111 through the mounting port 121. That is, during the casing process, the core 2 is inserted into the mounting cavity 111 through the mounting port 121. As the opening 12 moves away from the main body 11, the cross-sectional area of ​​the mounting port 121 tends to increase. Thus, during the process of inserting the core 2 into the mounting cavity 111 through the mounting port 121, the core 2 is less likely to come into contact with the wall of the opening 12, thereby reducing the risk of the core 2 and the edge of the battery casing 1 rubbing against each other.

[0029] In some examples, the shape of the mounting opening 121 may be "funnel-like", and the cross-sectional area of ​​the mounting opening 121 gradually increases as the opening 12 moves away from the main body 11.

[0030] The battery casing 1 can be a cylindrical battery casing. Please refer to... Figure 2 , Figure 2 Figure (a) is a front view of battery casing 1. Figure 2 Figure (b) is a right view of battery casing 1. Figure 2 Figure (c) is a rear view of battery case 1. Figure 2 Figure (d) is the left view of battery casing 1. Figure 2 Figure (e) is a top view of battery casing 1. Figure 2 Figure (f) is a bottom view of battery casing 1.

[0031] In some examples, the core is the core component of a lithium-ion battery (such as cylindrical or pouch batteries), composed of a positive electrode, a negative electrode, and a separator assembled through a lamination or winding process. It is the site where electrochemical reactions occur and energy is stored and released. The battery casing is the outer shell structure that encloses the core and electrolyte. The material can include metals (aluminum, steel) and polymers (plastics), and the shape can be cylindrical, square, or pouch.

[0032] Please combine Figure 3 , Figure 4 as well as Figure 5In some embodiments, the thickness of the opening 12 decreases as it moves away from the main body 11. That is, by reducing the thickness of the opening 12, the opening is widened, thereby facilitating the entry of the core 2 into the mounting cavity 111.

[0033] Please combine Figure 6 As shown in Figure (a), in some embodiments, the battery housing 1 can be a single-channel battery housing 1, and the main body 11 can include an integrally formed bottom wall and side wall, with the side wall forming a mounting cavity 111 extending along a first direction. One end of the mounting cavity 111 is blocked by the bottom wall, and the other end of the mounting cavity 111 is connected to the opening 12, so that the core 2 can enter the mounting cavity 111 from the mounting port 121 located at one end of the mounting cavity 111.

[0034] In these embodiments, the thickness of the opening 12 is reduced, the weight of the battery casing 1 is reduced, the utilization rate of raw materials in the casing is increased, and the cost is reduced. Furthermore, in some embodiments, the structure of the opening 12 is easily identifiable, making it easier for automated equipment to identify and locate it.

[0035] Please combine Figure 3 The main body 11 and the opening 12 can be integrally formed. The connection point between the opening 12 and the main body 11 can have a maximum thickness, which can be the same as the thickness of the main body 11. As the opening 12 moves away from the main body 11, the thickness of the opening 12 decreases. The opening 12 and the main body 11 can be arranged along a first direction. In these embodiments, the thickness can refer to the thickness of the cross-section of the opening 12 along a second direction, which is perpendicular to the first direction.

[0036] Please combine Figure 5 In some embodiments, the thickness L of the main body 11 ranges from 0.5mm to 10.0mm. For example, the thickness L of the main body 11 can be 0.5mm, 1.0mm, 2.0mm, 3.0mm, 4.0mm, 5.0mm, 6.0mm, 7.0mm, 8.0mm, 9.0mm, or 10.0mm. The thickness of the main body 11 can be uniform; for example, the thickness of the main body 11 can be 5.0mm at all points.

[0037] In some embodiments, the opening 12 includes a first connecting portion 122 and a second connecting portion 123. The second connecting portion 123 is connected between the first connecting portion 122 and the main body portion 11. The cross-section of the second connecting portion 123 facing the mounting opening 121 is arc-shaped, that is, the inner side of the second connecting portion 123 (the side of the second connecting portion 123 facing the mounting opening 121) is designed as an arc-shaped structure, so that the connection between the first connecting portion 122 and the main body portion 11 is relatively smooth and less likely to scratch the core 2.

[0038] In some embodiments, the arc shape is a circular arc. A circular arc shape can better maintain smoothness and reduce the probability of the core 2 scraping when entering the shell.

[0039] In some examples, the side of the second connecting part 123 facing the mounting port 121 can be set as a rounded corner structure, that is, an R-corner. Designing the inner side of the second connecting part 123 (the side of the second connecting part 123 facing the mounting port 121) as a rounded corner structure can better maintain smoothness and reduce the probability of the core 2 scratching when entering the shell.

[0040] Please combine Figure 5 In some embodiments, the central angle corresponding to the arc shape ranges from 30° to 75°, for example, values ​​can be 30°, 40°, 45°, 50°, 60°, 70°, or 75°. In some examples, the side of the second connecting portion 123 facing the mounting port 121 can be configured with a rounded corner structure. Please refer to... Figure 5 The range of angle 'a' for a rounded corner structure is 30°-75°. For example, the angle of a rounded corner structure can be 30°, 40°, 45°, 50°, 60°, 70°, or 75°.

[0041] The angle of the rounded corner structure can specifically refer to the central angle subtended by the R-angle arc.

[0042] In some embodiments, the first connecting portion 122 includes an inner surface 1221 and an outer surface 1223 disposed opposite to each other, and the distance between the inner surface 1221 and the outer surface 1223 gradually decreases as the first connecting portion 122 moves away from the main body portion 11. In other words, the thickness of the first connecting portion 122 gradually decreases as the first connecting portion 122 moves away from the main body portion 11. In some examples, the distance between the inner surface 1221 and the outer surface 1223 can be a specific distance between the inner surface 1221 and the outer surface 1223 along a cross section perpendicular to the axial direction. In some examples, the distance between the inner surface 1221 and the outer surface 1223 gradually decreases, and the minimum distance between the inner surface 1221 and the outer surface 1223 approaches zero.

[0043] Please combine Figure 5 In some embodiments, the included angle b between the inner surface 1221 and the outer surface 1223 ranges from 30° to 75°. For example, the included angle between the inner surface 1221 and the outer surface 1223 can be 30°, 40°, 45°, 50°, 60°, 70°, or 75°.

[0044] In some embodiments, the thickness of the opening 12 may remain unchanged, but the opening 12 may be expanded outward, thereby increasing the cross-sectional area of ​​the mounting port 121.

[0045] In some embodiments, the thickness of the opening 12 may be reduced, thereby increasing the cross-sectional area of ​​the mounting opening 121.

[0046] The battery casing 1 in this application embodiment can be a single-through battery casing 1, that is, the battery casing 1 includes one opening 12, or it can be a double-through battery casing 1, that is, the battery casing 1 includes two openings 12.

[0047] The battery casing 1 in this embodiment can be configured as a steel casing or an aluminum casing.

[0048] Please combine Figure 6 In Figure (b), in some examples, the battery case 1 can be a dual-channel battery case, which may include two openings 12, which are respectively connected to opposite ends of the main body 11.

[0049] According to a second aspect of this disclosure, a battery 3 is provided, which includes the battery casing 1 and the winding core 2 described above, with the winding core 2 disposed within the battery casing. This battery 3 possesses all the beneficial effects of the battery casing 1 described above, which will not be elaborated further herein.

[0050] Please combine Figure 7 According to a third aspect of this disclosure, an electrical device 4 is provided, which includes the battery 3 or the battery casing 1 described above. The electrical device 4 has all the beneficial effects of the battery 3 or the battery casing 1 described above, which will not be elaborated further here. The electrical device 4 may specifically include vehicles, energy storage power supplies, consumer electronics, medical devices, smart cities, etc.

[0051] In the description of this application, 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 technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0052] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0053] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0054] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A battery casing (1), characterized in that, include The main body (11) has a mounting cavity (111) formed thereon; and An opening (12) is connected to the main body (11), and the opening (12) is formed with a mounting port (121) communicating with the mounting cavity (111) so that the core (2) can enter the mounting cavity (111) from the mounting port (121); As the opening (12) moves away from the main body (11), the cross-sectional area of ​​the mounting port (121) tends to increase.

2. The battery casing (1) according to claim 1, characterized in that, As the opening (12) moves away from the main body (11), the thickness of the opening (12) decreases.

3. The battery casing (1) according to claim 1, characterized in that, The thickness of the main body (11) ranges from 0.5mm to 10.0mm.

4. The battery casing (1) according to claim 1, characterized in that, The opening (12) includes a first connecting part (122) and a second connecting part (123). The second connecting part (123) is connected between the first connecting part (122) and the main body (11). The cross-section of the second connecting part (123) facing the mounting port (121) is arc-shaped.

5. The battery casing (1) according to claim 4, characterized in that, The arc shape is a circular arc.

6. The battery casing (1) according to claim 5, characterized in that, The value range of the central angle corresponding to the arc is 30°-75°.

7. The battery casing (1) according to claim 4, characterized in that, The first connecting portion (122) includes an inner surface (1221) and an outer surface (1223) disposed opposite to each other. As the first connecting portion (122) moves away from the main body portion (11), the distance between the inner surface (1221) and the outer surface (1223) gradually decreases.

8. The battery casing (1) according to claim 7, characterized in that, The angle between the inner surface (1221) and the outer surface (1223) ranges from 30° to 75°.

9. The battery casing (1) according to any one of claims 1 to 8, characterized in that, The battery casing (1) includes two openings (12), which are respectively connected to opposite ends of the main body (11).

10. A battery (3), characterized in that, It includes a winding core and a battery casing (1) as described in any one of claims 1 to 9, wherein the winding core (2) is disposed within the battery casing (1).

11. An electrical appliance (4), characterized in that, Includes the battery casing (1) as described in any one of claims 1 to 9 or the battery (3) as described in claim 10.

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