Battery explosion-proof valve with embossed structure and battery cell

Abstract

The utility model provides a battery explosion-proof valve with knurling structures and a battery cell, the battery explosion-proof valve with knurling structures is used for sealing and covering a pressure relief hole of the battery cell, and comprises a polished section provided with a plurality of knurling structures arranged in an array; the blasting pressure relief part is arranged on the periphery of the polished section part, and a nick structure is arranged on the blasting pressure relief part; the connecting part is arranged on the periphery of the blasting pressure relief part and used for being connected with the edge of the outer wall of the pressure relief hole in a sealed mode; according to the battery explosion-proof valve with the embossed structures and the battery cell, through the embossed structures which are arranged on the polished section in an array manner, a simpler and more convenient processing technology and better stress uniformity are realized, and the problems that the processing technology of reinforcing ribs of an explosion-proof valve in the prior art is complicated and the reinforcing effect of each area of the valve body cannot be ensured to be consistent are solved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery explosion-proof valve with an embossed structure and a battery cell. Background Technology

[0002] With the booming development of the new energy industry, the safety of batteries, as their core energy component, has received increasing attention. During battery use, overcharging, overheating, or internal short circuits can cause a rapid increase in internal pressure. If this pressure is not released in time, it may lead to a battery explosion, seriously threatening user safety. Therefore, the design of battery explosion-proof valves plays a crucial role in improving battery safety.

[0003] Currently, battery explosion-proof valves typically employ a reinforcing rib structure to enhance their structural strength and ensure stability during transportation and welding, preventing deformation. However, while increasing the complexity of the manufacturing process, this design also introduces some problems. Because the reinforcing ribs are usually linearly distributed, they cannot ensure uniform reinforcement across all areas of the valve body, potentially leading to uneven stress distribution and affecting the overall performance and safety of the explosion-proof valve. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the technical problem to be solved by this utility model is to provide a battery explosion-proof valve and battery cell with an embossed structure, so as to solve the problems of complex processing technology of the reinforcing ribs of the explosion-proof valve and the inability to ensure the uniformity of the reinforcing effect in each area of ​​the valve body in the prior art.

[0005] To solve the above-mentioned technical problems, this utility model provides a battery explosion-proof valve with an embossed structure for sealing the pressure relief hole of the battery cell, characterized in that it includes:

[0006] The light sheet section is provided with several embossed structures arranged in an array;

[0007] A blasting pressure relief section is provided on the periphery of the light sheet section, and the blasting pressure relief section is provided with a grooved structure;

[0008] A connecting part is provided on the periphery of the rupture pressure relief part for sealing connection with the outer wall edge of the pressure relief hole.

[0009] As a more preferred approach, the embossed structure is a circular protrusion that bulges outward from the outer side of the light sheet portion. Due to its geometric shape, the circular protrusion can effectively disperse the force, making the pressure distribution on the structure more uniform and reducing local stress concentration. At the same time, when subjected to pressure, the circular protrusion can evenly transmit the pressure to every part of the structure through its geometric shape, thereby improving the structure's compressive strength. Furthermore, due to its symmetry, the circular protrusion can effectively control radial deformation and maintain the stability of the structure.

[0010] As a more preferred approach, the diameter of the circular protrusion ranges from 0 to 50 μm, and the depth of the circular protrusion ranges from 0 to 80 μm, thereby meeting the structural strength requirements of the battery explosion-proof valve.

[0011] As a more preferred approach, the embossed structure is a rectangular protrusion that protrudes outward from the outer side of the light sheet portion. Due to its geometric characteristics, the rectangular protrusion can accommodate more functional areas within a limited space. At the same time, when subjected to force, the rectangular protrusion usually has good structural stability due to its symmetrical and uniform force characteristics.

[0012] As a more preferred approach, the side length of the rectangular protrusion ranges from 0 to 50 μm, and the depth of the rectangular protrusion ranges from 0 to 80 μm.

[0013] As a more preferred approach, the thickness of the connecting part is greater than that of the explosion relief part, which ensures the connection strength between the connecting part and the pressure relief hole while ensuring that the battery explosion-proof valve can release pressure at a predetermined pressure.

[0014] As a more preferred approach, the distance between the welded edge of the connection and the groove of the burst pressure relief part should be ≥2mm.

[0015] As a more preferred approach, the grooves are located on the edge of the rupture relief section near the connecting section to better ensure the pressure relief effect.

[0016] As a more preferred approach, the grooves can be a continuous single segment or multiple discontinuous segments, with various groove design schemes to meet the needs of different battery cells.

[0017] This utility model also provides a battery cell, including the above-mentioned battery explosion-proof valve, wherein the pressure relief hole of the battery cell is sealed by the battery explosion-proof valve.

[0018] As described above, the battery explosion-proof valve and battery cell with embossed structure of this utility model have the following beneficial effects: When in use, the battery explosion-proof valve with embossed structure utilizes the connecting part to seal the outer wall edge of the pressure relief hole, thus sealing the pressure relief hole of the battery cell; under abnormal operating conditions, such as overcharging, overheating, or internal short circuit, the internal pressure of the battery rises sharply, and the explosion-proof valve can rupture from the embossed area, achieving rapid pressure relief; ensuring the safe release of internal pressure in the event of thermal runaway or other abnormal conditions, reducing the risk of explosion; simultaneously, the embossed structure process is relatively simpler than the traditional reinforcing rib processing process, as it is directly applied to the valve body surface of the battery explosion-proof valve without requiring additional reinforcement. The structure is flexible and efficient because it can be customized with different molds to create diverse patterns. In contrast, the reinforcing rib process is a method to improve the overall strength and rigidity of the battery explosion-proof valve by adding an extra support structure to the surface of the valve body. This process usually requires the valve body to withstand a large load to prevent deformation or damage under stress. Moreover, the addition of reinforcing ribs requires precise design and processing, including the shape, size and position of the reinforcing ribs, which may increase the complexity and cost of the production process. Finally, since the embossed structure is arranged in an array on the flat part, the uniformity of the stress on the structure is better, which further ensures the structural stability during transportation and welding.

[0019] The battery cell of this utility model adopts the above-mentioned battery explosion-proof valve with embossed structure. The stable structure of the battery explosion-proof valve further improves the stability and safety of the battery cell.

[0020] The battery explosion-proof valve and battery cell of this utility model with embossed structure achieve a simpler processing technology and better uniformity of force distribution through the embossed structure arranged in an array on the light plate part. It solves the problems of complex processing technology of the reinforcing ribs of the explosion-proof valve and the inability to ensure the uniformity of the reinforcement effect in each area of ​​the valve body in the prior art. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the battery explosion-proof valve with embossed structure according to the present invention from a normal perspective.

[0022] Figure 2 This is a schematic diagram of the battery explosion-proof valve with embossed structure according to another common perspective of the present invention.

[0023] Figure 3 The image shown is a front view of the battery explosion-proof valve with an embossed structure according to this utility model.

[0024] Figure 4 The image shown is a reverse view of the battery explosion-proof valve with an embossed structure according to this utility model.

[0025] Component designation explanation

[0026] 1. Optical section

[0027] 11 Embossed Structure

[0028] 2. Explosion relief section

[0029] 21 engravings

[0030] 3. Connecting parts Detailed Implementation

[0031] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0032] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this utility model, should still fall within the scope of the technical content disclosed in this utility model. The following detailed description should not be considered restrictive, and the scope of the embodiments of this application is limited only by the claims of the published patents. The terminology used herein is for describing specific embodiments only and is not intended to limit this application. Spatial terms such as "upper," "lower," "left," "right," "below," "below," "lower part," "above," "upper part," etc., may be used in the text to illustrate the relationship between one element or feature shown in the figures and another element or feature.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," and "holding" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] Furthermore, as used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context indicates otherwise. It should be further understood that the terms “comprising,” “including,” indicate the presence of the stated feature, operation, element, component, item, kind, and / or group, but do not preclude the presence, occurrence, or addition of one or more other features, operations, elements, components, items, kinds, and / or groups. The terms “or” and “and / or” as used herein are interpreted as inclusive, or mean any one or any combination thereof. Thus, “A, B, or C” or “A, B, and / or C” means “any one of: A; B; C; A and B; A and C; B and C; A, B, and C.” Exceptions to this definition arise only when combinations of elements, functions, or operations are inherently mutually exclusive in some manner.

[0035] like Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, this utility model provides a battery explosion-proof valve with an embossed structure for sealing the pressure relief hole of the battery cell, characterized in that it includes:

[0036] The light sheet section 1 is provided with a plurality of embossed structures 11 arranged in an array;

[0037] Explosion-induced pressure relief section 2, which is disposed on the periphery of the light sheet section 1, and has grooves 21 on it;

[0038] The connecting part 3 is disposed on the periphery of the blasting pressure relief part 2 and is used to seal and connect with the outer wall edge of the pressure relief hole.

[0039] To better illustrate the embossed structure battery explosion-proof valve of this invention, the following specific application will be used as an example: In use, the embossed structure battery explosion-proof valve utilizes the connecting part 3 to seal the outer edge of the pressure relief hole, thus sealing the pressure relief hole of the battery cell. Under abnormal operating conditions, such as overcharging, overheating, or internal short circuits, the internal pressure of the battery may rise sharply. The explosion-proof valve can rupture at the notch 21, achieving rapid pressure relief. This ensures the safe release of internal pressure in the event of thermal runaway or other abnormal conditions, reducing the risk of explosion. Furthermore, the embossed structure 11 process is relatively simpler than traditional reinforcing rib processing, as it is directly applied to the valve body surface without requiring additional... The reinforced structure allows for diverse pattern designs through different molds, making it flexible and efficient in the production process. In contrast, the reinforcing rib processing technology is a method to improve the overall strength and rigidity of the battery explosion-proof valve by adding an additional support structure to the valve body surface. This process usually requires the valve body to withstand a large load to prevent deformation or damage under stress. Moreover, the addition of reinforcing ribs requires precise design and processing, including the shape, size, and position of the reinforcing ribs, which may increase the complexity and cost of the production process. Finally, since the embossed structure 11 is arranged in an array on the light sheet part 1, the uniformity of its structural stress is also better, further ensuring the structural stability during transportation and welding.

[0040] In some embodiments of this utility model, such as Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, the embossed structure 11 can be a continuous whole or multiple discontinuous parts spaced apart from each other. Its specific structural design can be selected according to the performance of the battery cell.

[0041] In some embodiments of this utility model, such as Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, the embossed structure 11 and the groove 21 are respectively disposed on different sides of the light sheet part 1 and the explosion pressure relief part 2.

[0042] In some embodiments of this utility model, the embossed structure 11 can be processed by a pressure roller.

[0043] In some embodiments of this utility model, such as Figure 1 , Figure 2 , Figure 3 as well as Figure 4As shown, the light-emitting section 1, the explosion-relief section 2, and the connecting section 3 are manufactured using an integral molding method. The battery explosion-proof valve with the embossed structure of this utility model is made of aluminum material. More specifically, the battery explosion-proof valve is manufactured by stamping. Stamping has a series of significant advantages in manufacturing explosion-proof valves. These advantages include: First, stamping can quickly produce a large number of explosion-proof valves with high consistency, which is suitable for the needs of large-scale production. For example, a high-speed stamping press can produce hundreds of products per minute. Second, stamped explosion-proof valves have high dimensional accuracy and stable quality, and good interchangeability, which helps to ensure the safety performance of the battery. Moreover, stamping has less material loss, and the utilization rate of raw materials can be as high as 75% to 85%, which helps to reduce production costs. Finally, stamping can manufacture explosion-proof valves with simple and compact structures, which are easy to integrate into the battery system.

[0044] In some embodiments of this utility model, such as Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, the embossed structure 11 is a circular protrusion protruding outward from the outer side of the light sheet portion 1. Due to its geometric shape, the circular protrusion can effectively disperse the force, making the pressure distribution on the structure more uniform and reducing local stress concentration. At the same time, when subjected to pressure, the circular protrusion can evenly transmit the pressure to every part of the structure through its geometric shape, thereby improving the structure's compressive strength. Secondly, due to its symmetry, the circular protrusion can effectively control radial deformation and maintain the stability of the structure. Furthermore, the diameter of the circular protrusion is in the range of 0-50 μm, and the depth of the circular protrusion is in the range of 0-80 μm, thus meeting the structural strength requirements of the battery explosion-proof valve.

[0045] In some embodiments of this utility model, such as Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, the embossed structure 11 is a rectangular protrusion that protrudes outward from the outer side of the light sheet portion 1. Due to its geometric characteristics, the rectangular protrusion can accommodate more functional areas in a limited space. At the same time, when subjected to force, the rectangular protrusion usually has good structural stability due to its symmetrical and uniform force characteristics. Furthermore, the side length of the rectangular protrusion ranges from 0 to 50 μm, and the depth of the rectangular protrusion ranges from 0 to 80 μm.

[0046] In some embodiments of this utility model, such as Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, the thickness of the connecting part 3 is greater than that of the explosion relief part 2, which ensures the connection strength between the connecting part 3 and the pressure relief hole, while ensuring that the battery explosion-proof valve can release pressure at a predetermined pressure.

[0047] In some embodiments of this utility model, such as Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, the distance between the welding edge of the connecting part 3 and the groove of the explosion relief part 2 should be ≥2mm.

[0048] In some embodiments of this utility model, such as Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, the notch 21 is located on the edge of the blasting pressure relief part 2 near the connecting part 3 to better ensure the pressure relief effect.

[0049] In some embodiments of this utility model, such as Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, the notch 21 can be a continuous single segment or multiple discontinuous segments, and various notch 21 designs are available to meet the needs of different battery cells.

[0050] To solve the above problems, such as Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, this utility model also provides a battery cell, including the above-mentioned battery explosion-proof valve, wherein the pressure relief hole of the battery cell is sealed by the battery explosion-proof valve.

[0051] The battery cell of this utility model adopts the above-mentioned battery explosion-proof valve with embossed structure. The stable structure of the battery explosion-proof valve further improves the stability and safety of the battery cell. It can be seen that the battery explosion-proof valve and battery cell with embossed structure of this utility model, through the embossed structure 11 arrayed on the light sheet part 1, achieve a simpler processing technology and better uniformity of force, and solve the problems of complex processing technology of explosion-proof valve reinforcing ribs and inability to ensure consistent reinforcement effect in various areas of the valve body in the prior art.

[0052] In some embodiments of this utility model, the battery cell further includes a housing and a top cover that seals the housing, and the pressure relief hole is formed on the top cover.

[0053] In some embodiments of this utility model, such as Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, the outline of the pressure relief hole of the battery cell is elliptical, the outer outline of the corresponding battery explosion-proof valve is also elliptical, and the outer outlines of the corresponding light plate part 1, explosion pressure relief part 2 and connecting part 3 are all elliptical.

[0054] In some embodiments of this utility model, such as Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, the notch 21 consists of two discontinuous segments, symmetrically distributed at both ends of the blasting pressure relief section 2. Similarly, the outline of the notch 21 is also elliptical.

[0055] In some embodiments of this invention, the connecting part 3 is sealed to the pressure relief hole by laser welding. Laser welding achieves high-temperature melting in a very small area by precisely controlling the high energy density of the laser beam, thereby forming a strong and sealed weld. This technology not only improves the precision and quality of welding but also significantly increases production efficiency and product consistency. Compared with traditional welding methods, laser welding has several advantages: First, laser welding does not require contact with the workpiece, reducing mechanical damage to precision components such as explosion-proof valves and avoiding the costs of tool wear and replacement; second, laser welding has a small heat-affected zone, achieving micron-level welding precision, reducing deformation during welding, and ensuring the dimensional stability of battery components; moreover, laser welding is fast, significantly shortening the production cycle and improving production efficiency, which is particularly important for the large-scale battery industry; finally, laser welding technology is easy to integrate with automated systems, improving the stability and repeatability of the welding process through intelligent control, and reducing reliance on operator skills.

[0056] In summary, the battery explosion-proof valve and battery cell with embossed structure of this utility model have the following advantages:

[0057] 1. High safety: By setting the embossed structure 11 and the grooves 21 on the battery explosion-proof valve, the efficiency of battery pressure relief under abnormal conditions is improved, and the risk of explosion is reduced.

[0058] 2. Simplified production process: The array arrangement of the embossed structure 11 simplifies the processing technology, reducing production complexity and cost compared to the traditional reinforcing rib process.

[0059] 3. Structural stability: The uniform stress distribution of the embossed structure 11 improves the structural stability of the battery explosion-proof valve during transportation and welding.

[0060] 4. Diverse Designs: The embossed structure 11 can achieve diverse pattern designs through different molds, increasing the product's aesthetics and design flexibility.

[0061] 5. Integrated molding: The light sheet part 1, the explosion pressure relief part 2 and the connecting part 3 are made in one piece, which improves production efficiency and product consistency.

[0062] 6. Material advantages: The battery explosion-proof valve is made of aluminum, which takes advantage of aluminum's lightweight, high strength and easy processing properties.

[0063] 7. Precise control: The application of laser welding technology has improved welding precision and quality, while also increasing production efficiency and product consistency.

[0064] 8. Pressure relief efficiency: The design of notch 21 ensures that the internal pressure of the battery can be released quickly, thus improving the pressure relief efficiency.

[0065] 9. Design flexibility: The design of embossed structure 11 and groove 21 can be customized according to the performance requirements of the battery cell.

[0066] 10. Improve production efficiency: Stamping is suitable for large-scale production, which improves production speed and material utilization.

[0067] This patented battery explosion-proof valve with an embossed structure effectively improves battery safety and production efficiency through its innovative structural design. The embossed structure 11 and the notches 21 enable rapid pressure release under abnormal operating conditions, reducing the risk of explosion. Simultaneously, the simplified manufacturing process and diverse design enhance the product's aesthetics and design flexibility. The application of one-piece molding and stamping processes improves production efficiency and material utilization. The use of laser welding technology further enhances welding precision and quality. Overall, this patented battery explosion-proof valve design, through its unique structure and material selection, solves the problems of complex manufacturing processes and low pressure release efficiency in existing explosion-proof valves, providing strong protection for battery safety. Therefore, this utility model effectively overcomes the various shortcomings of existing technologies and has high industrial application value.

[0068] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A battery explosion-proof valve with an embossed structure for sealing the pressure relief hole of a battery cell, characterized in that, include: The light sheet section (1) is provided with a plurality of embossed structures (11) arranged in an array; Explosion pressure relief section (2), the explosion pressure relief section (2) is disposed on the periphery of the light sheet section (1), and the explosion pressure relief section (2) is provided with grooves (21); A connecting part (3) is provided on the periphery of the blasting pressure relief part (2) for sealing connection with the outer wall edge of the pressure relief hole.

2. The battery explosion-proof valve with an embossed structure according to claim 1, characterized in that: The embossed structure (11) is a circular protrusion that protrudes outward from the outer side of the light sheet portion (1).

3. The battery explosion-proof valve with an embossed structure according to claim 2, characterized in that: The diameter of the circular protrusion ranges from 0 to 50 μm, and the depth of the circular protrusion ranges from 0 to 80 μm.

4. The battery explosion-proof valve with an embossed structure according to claim 1, characterized in that: The embossed structure (11) is a rectangular protrusion that protrudes outward from the outer side of the light sheet portion (1).

5. The battery explosion-proof valve with an embossed structure according to claim 4, characterized in that: The side length of the rectangular protrusion ranges from 0 to 50 μm, and the depth of the rectangular protrusion ranges from 0 to 80 μm.

6. The battery explosion-proof valve with an embossed structure according to claim 1, characterized in that: The thickness of the connecting part (3) is greater than that of the blast relief part (2).

7. The battery explosion-proof valve with an embossed structure according to claim 1, characterized in that: The distance between the welding edge of the connecting part (3) and the groove of the explosion relief part (2) shall be ≥2mm.

8. The battery explosion-proof valve with an embossed structure according to claim 1, characterized in that: The groove (21) is provided on the edge of the blast relief part (2) near the connecting part (3).

9. The battery explosion-proof valve with an embossed structure according to claim 1, characterized in that: The engraving (21) can be a continuous segment or multiple discontinuous segments.

10. A battery cell, characterized in that: The battery explosion-proof valve includes any one of claims 1 to 9, wherein the pressure relief hole of the battery cell is sealed by the battery explosion-proof valve.

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