Shell structure of battery and battery
By designing the clamping parts and seals in the battery casing structure to deform and release pressure under high pressure, the risk of explosion in the event of battery failure was solved, thereby improving safety and production efficiency and simplifying the production process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN HYNETECH CO LTD
- Filing Date
- 2025-04-25
- Publication Date
- 2026-05-05
AI Technical Summary
Existing batteries pose a risk of explosion due to increased internal pressure during malfunctions, and adding extra manufacturing processes to improve safety would reduce production efficiency.
Design a battery casing structure, including a casing, a cover, and a seal, to create a gap or open an opening under high pressure by deforming the clamping part and the seal, thereby achieving gas depressurization and preventing explosion, without the need for additional manufacturing processes.
It improves battery safety and production efficiency, avoids additional production processes, and enhances sealing and pressure relief.
Smart Images
Figure CN224204187U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery technology, and in particular to a battery casing structure and a battery. Background Technology
[0002] A battery is a device that converts chemical energy into electrical energy. If a battery malfunctions, a large amount of flammable gas will be produced inside, causing a significant increase in internal pressure. If not addressed promptly, the battery may explode, compromising safety.
[0003] To ensure battery safety, explosion-proof films are typically installed on batteries, or the metal components of the battery are locally thinned. However, these batteries require additional manufacturing processes, resulting in low production efficiency. Utility Model Content
[0004] Therefore, it is necessary to provide a battery casing structure and battery that do not require additional processes, which is beneficial to improving production efficiency.
[0005] In a first aspect, this application provides a battery casing structure, comprising:
[0006] The housing has a receiving cavity and an opening, the receiving cavity being used to house the battery body, and the receiving cavity communicating with the opening;
[0007] A cover, the cover being disposed at the opening; and
[0008] A sealing element is disposed between the housing and the cover, and the sealing element is used to seal the gap between the housing and the cover;
[0009] The shell has a snap-fit part at the opening end, which presses against the periphery of the cover on the side away from the receiving cavity. The snap-fit part and the sealing element can deform to release the gas in the receiving cavity outward through the opening.
[0010] In one embodiment, the opening end of the housing is further provided with a flange portion, the flange portion extending outward from the receiving cavity, and the periphery of the cover is provided on the flange portion.
[0011] In one embodiment, the flange portion and the clamping portion are opposite to each other and spaced apart; the opening end of the housing is also provided with a connecting portion, which is located between the flange portion and the clamping portion, and the connecting portion is connected to the flange portion and the clamping portion to form a C-shape.
[0012] In one embodiment, the periphery of the cover has a first surface, a second surface, and a side surface, the first surface and the second surface being disposed opposite each other, and the side surface being disposed between the first surface and the second surface; the sealing member includes a first sealing part, a second sealing part, and a third sealing part, the first sealing part being disposed between the first surface and the pressing part, the second sealing part being disposed between the second surface and the flange part, and the third sealing part being disposed between the side surface and the connecting part.
[0013] In one embodiment, the first sealing portion has a first protruding ring at one end opposite to the third sealing portion, and the first protruding ring extends from the first sealing portion in a direction opposite to the second sealing portion.
[0014] In one embodiment, the second sealing portion has a second protruding ring at one end opposite to the third sealing portion, and the second protruding ring extends from the second sealing portion in a direction opposite to the first sealing portion.
[0015] In one embodiment, the first sealing portion, the second sealing portion, and the third sealing portion are connected to form a C-shape.
[0016] In one embodiment, the seal is a rubber ring.
[0017] In one embodiment, the housing is a stainless steel housing or a cold-rolled steel housing.
[0018] Secondly, this application also provides a battery, including a battery body and a casing structure of the battery as described in any of the above claims, wherein the battery body is disposed within the receiving cavity.
[0019] In the aforementioned battery casing structure and battery, during normal use, the retaining part presses against the periphery of the cover. When the battery malfunctions, a large amount of flammable gas is generated within the containment cavity, causing a significant increase in the gas pressure inside the cavity. When the gas pressure inside the containment cavity rises to a first preset gas pressure value, the retaining part and the sealing element deform, creating a gap between the casing and the cover. The gas inside the containment cavity can then be released through this gap, reducing the gas pressure inside the cavity. In extreme cases, such as when the gas pressure inside the containment cavity increases to a second preset gas pressure value, the retaining part tilts upward under the pressure, opening the cover to expose an opening, allowing the gas pressure inside the containment cavity to be released quickly and completely. Thus, under the action of gas pressure, the retaining part and the sealing element deform, allowing the gas inside the containment cavity to be released through the opening, achieving pressure relief, preventing battery explosion, improving battery safety, and eliminating the need for additional manufacturing processes, thereby improving battery production efficiency. Attached Figure Description
[0020] Figure 1This is a perspective view of a battery in normal use according to an embodiment of this application.
[0021] Figure 2 for Figure 1 The battery shown is shown in top view.
[0022] Figure 3 for Figure 2 Sectional view along the middle AA.
[0023] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle.
[0024] Figure 5 This is a perspective view of a battery in a depressurized state according to an embodiment of this application.
[0025] Figure 6 for Figure 5 The battery shown is shown in top view.
[0026] Figure 7 for Figure 6 A cross-sectional view along the middle BB.
[0027] Figure 8 for Figure 7 A magnified view of a portion of point B in the middle.
[0028] Explanation of icon numbers:
[0029] 10. Housing; 11. Receiving cavity; 12. Opening; 13. Clamping part; 14. Flange part; 15. Connecting part; 16. Mounting groove; 20. Cover; 21. First surface; 22. Second surface; 23. Side; 30. Seal; 31. First sealing part; 32. Second sealing part; 33. Third sealing part; 34. First convex ring; 35. Second convex ring. Detailed Implementation
[0030] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0031] See Figure 1 , Figure 1 A perspective view of a battery according to an embodiment of this application in its normal use state is shown. The battery casing structure provided in an embodiment of this application includes a housing 10, a cover 20, and a seal 30.
[0032] See Figure 3 , Figure 3 To show Figure 1 Cross-sectional view along the middle AA. The housing 10 has a receiving cavity 11 and an opening 12. The receiving cavity 11 is used to receive the battery body. The opening 12 communicates with the receiving cavity 11, and the cover 20 is provided at the opening 12.
[0033] It should be noted that the battery body is composed of coiled cores, nickel and aluminum strips, etc.
[0034] It should be noted that the position of opening 12 can be set according to actual needs. Figure 3 For example, the opening 12 is located at the top of the housing 10, so that the top of the housing 10 is the opening end. Of course, in other embodiments, the opening 12 may also be located at other parts of the housing 10, and is not limited thereto.
[0035] See Figure 3 and Figure 4 , Figure 3 It shows Figure 2 Sectional view along AA, Figure 4 It shows Figure 3 A partially enlarged schematic diagram at point A. A seal 30 is disposed between the housing 10 and the cover 20, and the cover 20 is sealed to the opening 12 by the seal 30. Thus, during normal battery use, the seal 30 can seal the gap between the housing 10 and the cover 20, making the receiving cavity 11 a sealed cavity.
[0036] However, after prolonged use, batteries may experience problems such as explosion, resulting in low safety. Therefore, in this embodiment, refer to... Figure 3 , Figure 4 , Figure 7 and Figure 8 The housing 10 has a snap-fit part 13 at its open end. The snap-fit part 13 is arranged around the opening 12 and presses against the periphery of the cover 20. Under the action of air pressure, the snap-fit part 13 and the sealing member 30 can deform so that the gas in the receiving cavity 11 can be released outward through the opening 12.
[0037] The clamping part 13 is a ring structure, and the clamping part 13 is arranged around the opening.
[0038] See Figure 1 , Figure 2 , Figure 3 and Figure 4 When the battery is in normal use, the snap-fit part 13 presses against the periphery of the cover 20 on the side opposite to the receiving cavity 11.
[0039] See Figure 5 , Figure 6 , Figure 7 and Figure 8When the battery malfunctions, a large amount of flammable gas is generated in the receiving cavity 11, causing a significant increase in the gas pressure inside the receiving cavity 11. When the gas pressure inside the receiving cavity 11 rises to a first preset gas pressure value, the clamping part 13 and the sealing member 30 can deform, forming a gap between the housing 10 and the cover 20. The gas inside the receiving cavity 11 can be released outward through the gap to reduce the gas pressure inside the receiving cavity 11. The first preset gas pressure value is a value between 2MPa and 3MPa.
[0040] In extreme cases, such as when the air pressure inside the cavity 11 increases to the second preset air pressure value, the clamping part 13 tilts upward under the action of air pressure, and the cover 20 opens to expose the opening 12, so that the air pressure inside the cavity 11 can be released quickly and completely.
[0041] In this way, under the action of air pressure, the pressing part 13 and the sealing part 30 can deform so that the gas in the receiving cavity 11 can be released outward through the opening 12, thereby achieving pressure relief, avoiding battery explosion, improving the safety of battery use, and at the same time, no additional production process is required, which is conducive to improving battery production efficiency.
[0042] In one embodiment, the housing 10 is a metal housing. It should be noted that the metal housing should have the property of being able to deform under certain pressure.
[0043] Alternatively, the metal casing can be made of stainless steel. Thus, the stainless steel casing 10 is sturdy, wear-resistant, and lightweight, and can also effectively prevent corrosion of the casing 10.
[0044] Optionally, the metal shell is made of cold-rolled steel. During the cold rolling process, cold-rolled steel undergoes repeated rolling, refining its crystal structure and forming a fine grain structure, thereby improving the strength and hardness of the shell 10. Cold-rolled steel has good ductility, formability, and impact toughness, and is easy to process and form. During the cold rolling process, cold-rolled steel exhibits good surface finish and smoothness, and is less prone to surface defects.
[0045] In one embodiment, see Figure 3 , Figure 4 , Figure 7 and Figure 8 The shell 10 also has a flange 14 at its open end, which is an annular structure. The flange 14 extends outward from the receiving cavity 11, and the periphery of the cover 20 is located on the flange 14. In this way, the flange 14 can support and limit the cover 20.
[0046] Further, see Figure 4 and Figure 8The flange portion 14 and the clamping portion 13 are opposite to each other and spaced apart. Furthermore, the open end of the housing 10 is also provided with a connecting portion 15, which is located between the flange portion 14 and the clamping portion 13. The connecting portion 15, the flange portion 14, and the clamping portion 13 are connected to form a C-shaped groove. This facilitates placing the periphery of the cover 20 and the sealing element 30 within the C-shaped groove, improving assembly efficiency and stability.
[0047] by Figure 4 For example, the flange portion 14 is located below the clamping portion 13, and the flange portion 14 extends outward from the receiving cavity 11 in a horizontal direction.
[0048] In one embodiment, the seal 30 is a rubber ring. Alternatively, the seal 30 is a rubber ring that can deform when heated.
[0049] When the air pressure inside the receiving cavity 11 is greater than or equal to a first preset air pressure value, and the temperature inside the receiving cavity 11 is greater than or equal to a preset temperature value, the rubber ring can deform. Thus, when the air pressure inside the receiving cavity 11 is greater than or equal to the first preset air pressure value, and the temperature inside the receiving cavity 11 is greater than or equal to the preset temperature value, the rubber ring can deform, creating a gap between the housing 10 and the cover 20. This allows the air pressure inside the receiving cavity 11 to be released outwards through the gap, preventing battery explosion and improving battery safety.
[0050] In one embodiment, see Figure 4 and Figure 8 The periphery of the cover 20 has a first surface 21, a second surface 22, and a side surface 23. The first surface 21 and the second surface 22 are disposed opposite to each other, and the side surface 23 is disposed between the first surface 21 and the second surface 22.
[0051] by Figure 4 For example, the first surface 21 is the upper surface of the periphery of the cover 20, and the second surface 22 is the lower surface of the periphery of the cover 20.
[0052] Further, see Figure 4 and Figure 8 The sealing element 30 includes a first sealing portion 31, a second sealing portion 32, and a third sealing portion 33. The first sealing portion 31 is disposed between the first surface 21 and the clamping portion 13, the second sealing portion 32 is disposed between the second surface 22 and the flange portion 14, and the third sealing portion 33 is disposed between the side surface 23 and the connecting portion 15. Specifically, the first sealing portion 31, the second sealing portion 32, and the third sealing portion 33 are all annular structures, and the first sealing portion 31, the second sealing portion 32, and the third sealing portion 33 are connected to form a C-shape.
[0053] By providing the first sealing part 31, the gap between the first surface 21 and the clamping part 13 can be sealed. By providing the second sealing part 32, the gap between the second surface 22 and the flange part 14 can be sealed. By providing the third sealing part 33, the gap between the side surface 23 and the connecting part 15 can be sealed. Thus, with the cooperation of the first sealing part 31, the second sealing part 32, and the third sealing part 33, the sealing performance between the housing 10 and the cover 20 can be improved.
[0054] In one embodiment, see Figure 4 and Figure 8 The first sealing part 31 has a first protruding ring 34 at one end opposite to the third sealing part 33, and the first protruding ring 34 extends from the first sealing part 31 in a direction opposite to the second sealing part 32. In this way, by providing the first protruding ring 34, the first protruding ring 34 can isolate and insulate the middle part of the clamping part 13 and the cover 20.
[0055] It should be noted that after the seal 30 is assembled into the mounting groove 16, the seal 30 deforms under the squeezing action of the pressing part 13 and the periphery of the cover 20 to form the first convex ring 34.
[0056] In one embodiment, see Figure 4 and Figure 8 The second sealing part 32 has a second protruding ring 35 at one end opposite to the third sealing part 33, and the second protruding ring 35 extends from the second sealing part 32 in a direction opposite to the first sealing part 31. In this way, the second protruding ring 35 can guide the core.
[0057] It should be noted that after the seal 30 is assembled into the mounting groove 16, the seal 30 deforms under the compression of the flange portion 14 and the periphery of the cover 20 to form the second convex ring 35.
[0058] This application also provides a battery, including a battery body and a casing structure of the battery as described above, wherein the battery body is disposed within a receiving cavity 11.
[0059] See Figure 5 , Figure 6 , Figure 7 and Figure 8 When the battery malfunctions, a large amount of flammable gas is generated in the receiving cavity 11, causing a significant increase in the gas pressure inside the receiving cavity 11. When the gas pressure inside the receiving cavity 11 rises to a first preset gas pressure value, the clamping part 13 and the sealing member 30 can deform, forming a gap between the housing 10 and the cover 20. The gas inside the receiving cavity 11 can be released outward through the gap to reduce the gas pressure inside the receiving cavity 11. The first preset gas pressure value is a value between 2MPa and 3MPa.
[0060] In extreme cases, such as when the air pressure inside the cavity 11 increases to the second preset air pressure value, the clamping part 13 tilts upward under the action of air pressure, and the cover 20 opens to expose the opening 12, so that the air pressure inside the cavity 11 can be released quickly and completely.
[0061] In this way, under the action of air pressure, the pressing part 13 and the sealing part 30 can deform so that the gas in the receiving cavity 11 can be released outward through the opening 12, thereby achieving pressure relief, avoiding battery explosion, improving the safety of battery use, and at the same time, no additional production process is required, which is conducive to improving battery production efficiency.
[0062] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not 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 application.
[0063] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0064] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0065] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via 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. Similarly, "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.
[0066] It should be noted that if 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. If 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. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.
[0067] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0068] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
Claims
1. A battery casing structure, characterized in that, include: The housing has a receiving cavity and an opening, the receiving cavity being used to house the battery body, and the receiving cavity communicating with the opening; A cover, wherein the cover is disposed at the opening; as well as A sealing element is disposed between the housing and the cover, and the sealing element is used to seal the gap between the housing and the cover; The shell has a snap-fit part at the opening end, which presses against the periphery of the cover on the side away from the receiving cavity. The snap-fit part and the sealing element can deform to release the gas in the receiving cavity outward through the opening.
2. The battery casing structure according to claim 1, characterized in that, The shell is also provided with a flange at the open end, the flange extends outward from the receiving cavity, and the periphery of the cover is provided on the flange.
3. The battery casing structure according to claim 2, characterized in that, The flange portion and the clamping portion are opposite to each other and spaced apart; the open end of the housing is also provided with a connecting portion, which is located between the flange portion and the clamping portion, and the connecting portion is connected to the flange portion and the clamping portion to form a C-shape.
4. The battery casing structure according to claim 3, characterized in that, The periphery of the cover has a first surface, a second surface, and a side surface, the first surface and the second surface are disposed opposite to each other, and the side surface is disposed between the first surface and the second surface; The sealing element includes a first sealing part, a second sealing part, and a third sealing part. The first sealing part is disposed between the first surface and the clamping part, the second sealing part is disposed between the second surface and the flange part, and the third sealing part is disposed between the side surface and the connecting part.
5. The battery casing structure according to claim 4, characterized in that, The first sealing part has a first protruding ring at one end away from the third sealing part, and the first protruding ring extends from the first sealing part in a direction away from the second sealing part.
6. The battery casing structure according to claim 4, characterized in that, The second sealing part has a second protruding ring at one end opposite to the third sealing part, and the second protruding ring extends from the second sealing part in a direction opposite to the first sealing part.
7. The battery casing structure according to claim 4, characterized in that, The first sealing part, the second sealing part, and the third sealing part are connected to form a C-shape.
8. The battery casing structure according to any one of claims 1 to 7, characterized in that, The sealing element is a rubber ring.
9. The casing structure of the battery according to any one of claims 1 to 7, characterized in that, The shell is a stainless steel shell or a cold-rolled steel shell.
10. A battery, characterized in that, It includes a battery body and a housing structure of the battery as described in any one of claims 1 to 9, wherein the battery body is disposed within the receiving cavity.