Hemmed battery

Abstract

The utility model discloses a hemming battery. The hemming battery comprises a battery cell body, a protective sleeve and a protective film, the cell body is provided with a first end face and a second end face which are opposite, and the cell body is provided with a curled edge. A containing cavity and an opening communicated with the containing cavity are formed in the protective sleeve, the side wall of the opening extends to form a containing groove body matched with the curled edge, the containing cavity is used for containing the battery cell body, the second end face is attached to the inner side wall of the bottom of the protective sleeve, and the containing groove body is used for wrapping the curled edge. The protective film is positioned at the opening and is attached to the first end surface, facing the opening, of the battery cell body; and the accommodating groove body is matched with the curled edge, so that the battery cell body can be tightly wrapped by the protective sleeve, and the film wrapping effect on the curled edge battery is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery devices, in particular to a curled-edge battery. Background Art

[0002] For the surface of the housing of existing conventional square batteries and cylindrical batteries, mainly blue film wrapping or UV insulation coating is adopted for battery insulation and physical protection. However, a curled-edge structure is provided on the curled-edge battery. When using the blue film wrapping method to wrap the curled-edge battery, the blue film will wrinkle at the curled edge, and a flat and beautiful wrapping effect cannot be achieved. It is difficult for the wrapping equipment to achieve the wrapping effect of the curled-edge battery.

[0003] The curled-edge structure will cause the UV spraying light to be not fully irradiated, resulting in poor curing effect of the coating. Therefore, both the blue film wrapping and the UV insulation coating process are not applicable to the curled-edge battery. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a curled-edge battery, aiming to solve the technical problem of poor wrapping effect of the blue film wrapping and the UV insulation coating on the curled-edge battery.

[0005] In order to achieve the above-mentioned utility model purpose, the utility model proposes a curled-edge battery.

[0006] A curled-edge battery, comprising:

[0007] A battery cell body, the battery cell body is provided with a curled edge, and the battery cell body has opposite first end face and second end face;

[0008] A protective sleeve, an accommodating cavity and an opening communicating with the accommodating cavity are arranged in the protective sleeve, the accommodating cavity is used for accommodating the battery cell body, and the second end face is attached to the inner side wall of the bottom of the protective sleeve. The side wall of the opening extends to form a receiving groove body adapted to the curled edge, and the receiving groove body is used for wrapping the curled edge; and

[0009] A protective film, the protective film is located at the opening and is attached to the first end face of the battery cell body facing the opening.

[0010] In one embodiment, the protective sleeve includes a bottom surface and a side surface, the side surface is arranged at the outer edge of the bottom surface to enclose the accommodating cavity, the receiving groove body is arranged on the side of the side surface away from the bottom surface, the bottom surface is attached to the second end face of the battery cell body, and the side surface wraps the outside of the battery cell body.

[0011] In one embodiment, the bottom surface, the side surface and the receiving groove body are of an integrally formed structure.

[0012] In one embodiment, the side surface includes a first side plate, a second side plate, a third side plate, and a fourth side plate. The first side plate is disposed opposite to the third side plate, the second side plate is disposed opposite to the fourth side plate, the first side plate, the second side plate, the third side plate, and the fourth side plate are connected in sequence, and arc structures are provided at each connection;

[0013] The battery cell body is provided with a plurality of arc corners, and the curvature radius of the arc corners is the same as that of the arc structures.

[0014] In one embodiment, the accommodating groove body is provided with a guiding port, the guiding port communicates the inside of the accommodating groove body with the accommodating cavity, and the curled edge can enter the inside of the accommodating groove body through the guiding port.

[0015] In one embodiment, the accommodating groove body includes a first cavity and a second cavity that are connected and communicate with each other. The second cavity communicates with the accommodating cavity, and the second cavity is located between the first cavity and the accommodating cavity;

[0016] The curled edge includes a curled edge main body and a transition portion, and the transition portion is located between the curled edge main body and the first end face;

[0017] The first cavity wraps the curled edge main body, and the second cavity wraps the transition portion.

[0018] In one embodiment, a first pole column is provided on one side of the battery cell body, and a second pole column is provided on the other side;

[0019] A first avoidance hole is provided on one side of the protective sleeve, and a second avoidance hole is provided on the other side;

[0020] The first pole column is exposed outside the first avoidance hole, and the second pole column is exposed outside the second avoidance hole.

[0021] In one embodiment, the protective film abuts against the accommodating groove body to close the opening.

[0022] In one embodiment, the protective sleeve is an elastic sleeve body.

[0023] In one embodiment, the protective sleeve is an insulating protective sleeve.

[0024] Advantageous effects:

[0025] In the present utility model, the battery cell body has opposite first and second end faces. A curled edge is provided at the outer edge of the first end face. The battery cell body is accommodated in the accommodation cavity of the protective sleeve. The second end face is attached to the inner side wall of the bottom of the protective sleeve. The curled edge is wrapped in the accommodation groove body. Then, a protective film is disposed at the opening of the protective sleeve and attached to the first end face of the battery cell body facing the opening. The adaptation setting of the accommodation groove body and the curled edge enables the protective sleeve to tightly wrap the battery cell body, improving the film wrapping effect on the curled edge battery. Description of the Drawings

[0026] Figure 1 is a schematic structural view of a curled edge battery according to an embodiment of the present utility model.

[0027] Figure 2 is an exploded view of a curled edge battery according to an embodiment of the present utility model.

[0028] Figure 3 is a top view of a curled edge battery according to an embodiment of the present utility model.

[0029] Figure 4 is Figure 3 a cross-sectional view taken along the A-A direction in

[0030] Figure 5 is Figure 4 an enlarged view at B in

[0031] Figure 6 is a schematic structural view of a protective sleeve according to an embodiment of the present utility model.

[0032] Figure 7 is a top view of a protective sleeve according to an embodiment of the present utility model.

[0033] Figure 8 is Figure 7 a cross-sectional view taken along the C-C direction.

[0034] Figure 9 is Figure 8 an enlarged view at D in

[0035] Wherein:

[0036] 100, battery cell body; 110, first end face; 120, second end face; 130, curled edge; 131, curled edge main body; 132, transition part; 140, first pole; 150, second pole; 160, arc angle;

[0037] 200. Protective cover; 210. Accommodating cavity; 220. Opening; 230. Receiving groove body; 231. Guide port; 232. First cavity; 233. Second cavity; 240. First avoidance hole; 250. Second avoidance hole; 260. Bottom surface; 270. Side surface; 271. First side plate; 272. Second side plate; 273. Third side plate; 274. Fourth side plate; 275. Arc structure;

[0038] 300. Protective film.

[0039] The realization of the purpose, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0040] It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0041] In the description of the present 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", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, "a plurality" means two or more, unless otherwise specifically defined.

[0042] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection, a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0043] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0044] As Figure 1 and Figure 2 shown, in some embodiments, a crimped battery includes a battery cell body 100, a protective sleeve 200 and a protective film 300. The protective sleeve 200 and the protective film 300 jointly wrap the battery cell body 100 to provide insulation protection and physical protection for the battery cell body 100.

[0045] In some embodiments, the shape of the battery cell body 100 may be square. The square battery cell body 100 has a simple structure and a relatively high energy density, and is suitable for customized production.

[0046] In other embodiments, the shape of the battery cell body 100 may also be a cylinder or a soft package, etc.

[0047] In some embodiments, a plurality of battery cell bodies 100 may be provided. The plurality of battery cell bodies 100 can be connected in parallel and in series to form a battery module with a specific voltage and capacity.

[0048] In some embodiments, the battery cell body 100 has opposite first end faces 110 and second end faces 120. As Figure 2 shown in the direction, the first end face 110 is the upper end face of the battery cell body 100. The second end face 120 is the lower end face of the battery cell body 100. The first end face 110 and the second end face 120 are arranged in parallel.

[0049] As Figure 2 shown, specifically, the battery cell body 100 is provided with a crimp 130.

[0050] In some embodiments, the protective sleeve 200 is an elastic sleeve body. The elastic sleeve body can adapt to the cell body 100 of different sizes and the cell body 100 with an irregular shape. During the operation of the cell body 100, expansion occurs, resulting in a slight deformation of the cell body 100. The elastic sleeve body can automatically adapt to the deformed cell body 100 to prevent the cell body 100 from being squeezed and damaged. Specifically, the material of the protective sleeve 200 can be silicone. Silicone can be used at high temperatures for a long time without degradation. The maximum temperature of silicone can reach above 200 degrees Celsius. Silicone has good electrical insulation. By using the soft rubber sleeve coating process, the irregular cell body 100 can be coated, and the equipment investment cost is low, and the equipment occupies less space.

[0051] For the crimped batteries and irregularly shaped batteries that cannot implement the blue film coating process or the UV insulation coating process, the soft rubber sleeve coating process can be adopted. When there are appearance defects such as appearance wear and scratches or poor battery insulation during the handling and use of the battery, by using the soft rubber sleeve coating process, the protective sleeve 200 of silicone can be quickly replaced to achieve quick repair.

[0052] In some embodiments, the protective sleeve 200 is an insulating protective sleeve. The insulating protective sleeve provides an insulating effect for the cell body 100 to prevent the cell body 100 from short-circuiting or contacting with external objects to cause current leakage, thereby protecting the safety of the cell body 100.

[0053] In some embodiments, the thickness of the protective sleeve 200 can be 60μm to 500μm. Specifically, the thickness of the protective sleeve 200 can be 110μm. The thickness of the protective sleeve 200 can also be customized according to the cell body 100.

[0054] As Figure 6 and Figure 8 shown, in some embodiments, a receiving cavity 210 is provided inside the protective sleeve 200. The receiving cavity 210 is used to receive the cell body 100. When the cell body 100 is received in the receiving cavity 210, the second end face 120 of the cell body 100 is attached to the inner side wall of the bottom of the protective sleeve 200.

[0055] Specifically, the receiving cavity 210 can be a square cavity to adapt to the square cell body 100.

[0056] As Figure 6 、 Figure 8 and Figure 9 shown, in some embodiments, an opening 220 is further provided inside the protective sleeve 200. The opening 220 communicates with the receiving cavity 210. The cell body 100 is received in the receiving cavity 210 through the opening 220. Specifically, the opening 220 can be a square structure to adapt to the square cell body 100 to enter the receiving cavity 210 through the opening 220.

[0057] In related technologies, a UV insulating coating process requires the use of UV glue. The curing of UV glue requires the use of ultraviolet light. The penetration of ultraviolet light into certain plastic or translucent materials is weak, and the curing depth is limited. The geometric shape of the curable product is restricted, and the opaque parts and the dead corners that cannot be irradiated by ultraviolet light are not easily cured. The curling of the curled-edge battery is irregular, and the UV spraying and ultraviolet light irradiation are not comprehensive, which will affect the coating curing effect. Since the UV glue becomes very firm after curing, it cannot be repaired or disassembled.

[0058] In some embodiments, the side wall of the opening 220 extends to form a receiving groove body 230 adapted to the curled edge 130. The receiving groove body 230 is used to wrap the curled edge 130. The adaptation setting of the receiving groove body 230 and the curled edge 130 enables the protective sleeve 200 to tightly wrap the battery cell body 100, improving the film wrapping effect on the curled-edge battery.

[0059] As Figure 9 shown, specifically, the receiving groove body 230 is provided with a guiding port 231. The guiding port 231 communicates the inside of the receiving groove body 230 with the accommodating cavity 210, and the curled edge 130 can enter the inside of the receiving groove body 230 through the guiding port 231.

[0060] As Figures 3 to 5 and Figures 7 to 9 shown, specifically, the receiving groove body 230 includes a first cavity 232 and a second cavity 233 that are connected and communicated. The second cavity 233 communicates with the accommodating cavity 210, and the second cavity 233 is located between the first cavity 232 and the accommodating cavity 210. The curled edge 130 includes a curled-edge main body 131 and a transition portion 132. The transition portion 132 is located between the curled-edge body and the first end face 110. The first cavity 232 wraps the curled-edge main body 131. The second cavity 233 wraps the transition portion 132. That is, the first cavity 232 is adapted to the curled-edge main body 131. The second cavity 233 is adapted to the transition portion 132 to improve the sealing performance of the receiving groove body 230 in wrapping the curled edge 130.

[0061] Specifically, the first cavity 232 is farther away from the opening 220 than the second cavity 233.

[0062] As Figure 1 、 Figure 3 and Figure 6 shown, in some embodiments, a first pole 140 is provided on one side of the battery cell body 100, and a second pole 150 is provided on the other side. A first avoidance hole 240 is provided on one side of the protective sleeve 200, and a second avoidance hole 250 is provided on the other side. The first pole 140 is exposed outside the first avoidance hole 240, and the second pole 150 is exposed outside the second avoidance hole 250.

[0063] Specifically, the first avoidance hole 240 and the second avoidance hole 250 are oppositely arranged. More specifically, the first avoidance hole 240 and the second avoidance hole 250 are arranged in parallel.

[0064] Specifically, the first avoidance hole 240 and the second avoidance hole 250 have the same shape and size.

[0065] Specifically, both the first avoidance hole 240 and the second avoidance hole 250 are in a strip-shaped structure.

[0066] As Figure 2 shown, in some embodiments, the protective sleeve 200 includes a bottom surface 260. The bottom surface 260 is attached to the second end face 120 of the battery cell body 100. That is, the bottom surface 260 provides insulation protection and physical protection for the second end face 120 of the battery cell body 100.

[0067] Specifically, the bottom surface 260 can be in a square structure.

[0068] As Figure 2 shown, in some embodiments, the protective sleeve 200 further includes a side surface 270. The side surface 270 is used to wrap the outer side of the battery cell body 100, and the side surface 270 provides insulation protection and physical protection for the outer side of the battery cell body 100.

[0069] Specifically, the first avoidance hole 240 and the second avoidance hole 250 are specifically arranged on the side surface 270.

[0070] Specifically, the side surface 270 can be a closed annular structure to fully wrap the outer side of the battery cell body 100.

[0071] Specifically, the side surface 270 is arranged on the outer edge of the bottom surface 260 to enclose a receiving cavity 210. The receiving groove body 230 is arranged on the side of the side surface 270 away from the bottom surface 260.

[0072] In some embodiments, the bottom surface 260, the side surface 270, and the receiving groove body 230 are an integrally formed structure, thereby improving the sealing performance of wrapping the battery cell.

[0073] As Figure 6 shown, in some embodiments, the side surface 270 includes a first side plate 271, a second side plate 272, a third side plate 273, and a fourth side plate 274. The first side plate 271 and the third side plate 273 are oppositely arranged. The second side plate 272 and the fourth side plate 274 are oppositely arranged. The first side plate 271, the second side plate 272, the third side plate 273, and the fourth side plate 274 are sequentially connected, and arc structures 275 are arranged at each connection. The battery cell body 100 is provided with a plurality of arc corners 160. The curvature radius of the arc corners 160 is the same as the curvature radius of the arc structures 275.

[0074] In the related art, when wrapping a crimped battery with a blue film, the blue film is prone to form wrinkles at the arc corner 160 (R corner), and it is impossible to achieve an integrated film wrapping at the arc corner 160, which affects the sealing performance of the film wrapping and the aesthetics of the film wrapping. In this embodiment, an arc structure 275 having the same radius of curvature as the arc corner 160 is provided on the protective cover 200 to adapt to the arc corner 160 of the battery cell body 100, which can enhance the sealing performance of the protective cover 200 wrapping the battery cell body 100 and is more aesthetically pleasing.

[0075] Specifically, the first side plate 271 and the third side plate 273 have the same shape and size. The first side plate 271 and the third side plate 273 are arranged in parallel.

[0076] Specifically, the second side plate 272 and the fourth side plate 274 have the same shape and size. The second side plate 272 and the fourth side plate 274 are arranged in parallel.

[0077] Specifically, the first side plate 271, the second side plate 272, the third side plate 273, and the fourth side plate 274 are sequentially connected to form a closed annular structure.

[0078] Specifically, the first side plate 271, the second side plate 272, the third side plate 273, and the fourth side plate 274 are all square structures.

[0079] As Figure 2 shown, in some embodiments, the protective film 300 is located at the opening 220 and is attached to the first end face 110 of the battery cell body 100 facing the opening 220. The protective film 300 provides insulation protection and physical protection for the first end face 110 of the battery cell body 100.

[0080] Specifically, the material of the protective film 300 can be silicone.

[0081] Specifically, the thickness of the protective film 300 can be 60μm to 500μm. More specifically, the thickness of the protective film 300 can be 110μm. The thickness of the protective film 300 can also be customized according to the battery cell body.

[0082] Specifically, the protective film 300 abuts against the receiving groove body 230 to close the opening 220. The protective film 300 helps to improve the sealing performance of the battery, prevent external moisture and dust from entering the protective cover 200, and extend the service life of the battery cell body 100.

[0083] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A rolled edge battery, characterized in that: include: A battery cell body, wherein the battery cell body is provided with a curling edge, and the battery cell body has a first end face and a second end face opposite to each other; A protective cover, wherein a receiving cavity and an opening communicating with the receiving cavity are provided in the protective cover, the receiving cavity is used to receive the battery cell body, and the second end surface is attached to the inner side wall of the bottom of the protective cover, and the side wall of the opening extends to form a receiving groove body adapted to the curling edge, and the receiving groove body is used to wrap the curling edge; and A protective film is located at the opening and is attached to a first end surface of the battery cell body facing the opening.

2. The rolled-edge battery according to claim 1, characterized in that: The protective cover includes a side surface and a bottom surface, the side surface is arranged at the outer edge of the bottom surface to enclose the accommodating cavity, the accommodating groove body is arranged on the side of the side surface away from the bottom surface, the bottom surface is attached to the second end surface of the battery cell body, and the side surface wraps the outer side of the battery cell body.

3. The rolled-edge battery according to claim 2, characterized in that: The bottom surface, the side surface and the accommodating groove body are an integrally formed structure.

4. The rolled-edge battery according to claim 2, characterized in that: The side surface includes a first side plate, a second side plate, a third side plate and a fourth side plate, the first side plate is arranged opposite to the third side plate, the second side plate is arranged opposite to the fourth side plate, the first side plate, the second side plate, the third side plate and the fourth side plate are connected in sequence, and an arc structure is arranged at each connection; The battery cell body is provided with a plurality of arc angles, and the curvature radius of the arc angles is the same as the curvature radius of the arc structure.

5. The rolled-edge battery according to claim 1, characterized in that: The receiving groove body is provided with a guide opening, and the guide opening connects the interior of the receiving groove body with the receiving cavity, and the curling edge can enter the interior of the receiving groove body through the guide opening.

6. The rolled-edge battery according to claim 1, characterized in that: The receiving tank body comprises a first cavity and a second cavity which are connected to each other, the second cavity is connected to the receiving cavity, and the second cavity is located between the first cavity and the receiving cavity; The curling edge comprises a curling edge body and a transition portion, wherein the transition portion is located between the curling edge body and the first end surface; The first cavity wraps the curling body, and the second cavity wraps the transition portion.

7. The rolled-edge battery according to claim 1, characterized in that: A first pole is disposed on one side of the battery cell body, and a second pole is disposed on the other side; A first avoidance hole is formed on one side of the protective cover, and a second avoidance hole is formed on the other side of the protective cover; The first pole is exposed at the first avoidance hole, and the second pole is exposed at the second avoidance hole.

8. The rolled-edge battery according to claim 1, characterized in that: The protective film abuts against the containing groove to close the opening.

9. The rolled-edge battery according to claim 1, characterized in that: The protective sleeve is an elastic sleeve.

10. The rolled-edge battery according to claim 1, characterized in that: The protective cover is an insulating protective cover.

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