Plastic part, positive electrode structure, and battery

Abstract

The utility model relates to a battery field provides a kind of plastic parts, positive pole structure and battery.Plastic parts includes plastic part body, and flow-through groove is formed with on the side of plastic part body towards pole column, flow-through groove is recessed along the thickness direction of plastic part and extends along the radial direction of plastic part body, in the case where seal is missed, flow-through groove is suitable for establishing the fluid passage of helium detection between battery interior and battery exterior.The plastic part establishes the fluid passage of helium detection by flow-through groove in the case where seal is missed, greatly improves the detection ability to the missing condition of battery seal;When seal is missed, helium can quickly escape from battery interior to external detection equipment through flow-through groove, so that detection equipment can rapidly and accurately detect missing condition, thereby effectively avoid the battery of missing seal to flow into market, improve the quality and safety of battery product;Reduce the number of parts and assembly process, reduce production cost and production difficulty.

Description

Technical Field

[0001] This utility model relates to the field of batteries, and provides a plastic part, a positive electrode structure, and a battery. Background Technology

[0002] In current cylindrical battery manufacturing processes, the positive electrode structure mainly includes components such as plastic parts, battery casing, sealing rings, lower plastic parts, riveting blocks, and terminals. The terminals ensure the battery's airtightness through riveting and sealing, thereby preventing electrolyte leakage and gas escape.

[0003] However, in actual production, there is a risk of missing sealing rings due to inaccurate manual assembly. Furthermore, as a material prone to deformation when heated (PPS), plastic parts also undergo some compression deformation during riveting. This makes it difficult to effectively identify completely missing sealing rings even with a helium gas detection system. Over time, or due to mechanical pressure, vibration, and impacts during production, these minute deformations may lead to battery seal failure, resulting in leakage and other problems.

[0004] Therefore, if batteries with completely missing sealing rings cannot be effectively detected, these unstable and defective products may enter the market, seriously affecting the reliability and safety of the products. Utility Model Content

[0005] This utility model provides a plastic part to solve the defect in related technologies where the lack of a seal makes it impossible to effectively detect defects.

[0006] This utility model embodiment also provides a positive electrode structure.

[0007] This utility model embodiment also provides a battery.

[0008] A first aspect of this utility model provides a plastic part, including a plastic part body, wherein a flow groove is formed on the side of the plastic part body facing the electrode post, the flow groove being recessed along the thickness direction of the plastic part and extending along the radial direction of the plastic part body.

[0009] According to one embodiment of the present invention, the width of the flow groove along the radial direction of the plastic part body ranges from 1 mm to 1.8 mm.

[0010] According to one embodiment of the present invention, the depth of the flow groove is greater than or equal to 0.1 mm along the thickness direction of the plastic part body.

[0011] According to one embodiment of the present invention, at least two flow grooves are formed at intervals on the plastic part body along the circumferential direction of the plastic part body.

[0012] According to one embodiment of the present invention, at least three flow grooves are formed at intervals on the plastic part body along the circumferential direction of the plastic part body, and the spacing between two adjacent flow grooves is equal.

[0013] According to one embodiment of the present invention, the plastic part body includes:

[0014] An annular body is disposed between the terminal post and the battery casing, and the flow groove is formed on the side of the annular body facing the terminal post;

[0015] The boss is integrally formed with the annular body and is located on the outer edge of the annular body.

[0016] According to one embodiment of the present invention, a gap is formed between the inner edge of the boss body and the outer edge of the pole post. In the case of a missing seal, the fluid passage and the gap together form the fluid passage.

[0017] According to one embodiment of the present invention, the side of the annular body facing the pole post is in close contact with the pole post.

[0018] A second aspect of this utility model provides a positive electrode structure, including an electrode post and a plastic part as described above.

[0019] A third aspect of this utility model provides a battery, including the plastic parts described above;

[0020] Or, as described above, a positive electrode structure.

[0021] According to the plastic part provided in the first aspect of this utility model, by establishing a fluid path for helium gas detection using a flow channel in the event of a missing seal, the detection capability for missing battery seals is greatly improved. Helium has good permeability and detection sensitivity. When a seal is missing, helium can quickly escape from inside the battery to the external detection equipment through the flow channel, enabling the detection equipment to quickly and accurately detect the missing seal. This effectively prevents batteries with missing seals from entering the market, improving the quality and safety of battery products. This design achieves the fluid path function for helium gas detection simply by forming a flow channel on the plastic part body. Compared to other complex detection structures, this design reduces the number of parts and assembly steps, lowering production costs and reducing production difficulty. Simultaneously, because the flow channel is integrally molded with the plastic part body, the structure has high stability and is less prone to loosening or damage, ensuring the long-term reliability of the detection function. The annular structure of the plastic part body and the design of the flow channel have good compatibility with common battery terminal and casing structures. It can be easily applied to battery products of different specifications and models without requiring large-scale modifications to the overall battery structure.

[0022] According to the positive electrode structure provided in the second aspect of this utility model, the excellent conductivity of the electrode post and its reliable assembly with the plastic component ensure that the positive electrode structure can effectively transfer the electrical energy inside the battery to the external circuit. Stable electrical connection reduces resistance and energy loss, improving the battery's charging and discharging efficiency and performance stability. Simultaneously, the selection of corrosion-resistant materials ensures that the electrode post will not experience performance degradation due to electrolyte erosion during long-term use, extending the battery's lifespan. The tight fit and sealing measures between the plastic component and the electrode post effectively prevent electrolyte leakage. This not only protects other internal components of the battery from electrolyte corrosion but also avoids damage to the surrounding environment and equipment caused by electrolyte leakage. Furthermore, even in the event of a missing seal, the flow channel in the plastic component can still function normally, allowing for timely detection of problems via helium gas testing, further improving the battery's safety and reliability. The positive electrode structure design utilizes common materials and mature manufacturing processes, reducing production costs and manufacturing difficulty, and improving production efficiency and product quality consistency. In addition, due to the simple assembly method of the terminals and plastic parts, the positive electrode structure is easy to disassemble and replace during battery maintenance and repair, reducing maintenance costs and time.

[0023] According to the battery provided in the third aspect embodiment of this utility model, the flow channel design in the plastic parts or positive electrode structure provides an effective fluid path for helium gas detection, enabling timely detection of leaks in the sealing components. This significantly reduces the probability of safety hazards such as electrolyte leakage and short circuits caused by poor sealing, improving battery safety during use. Simultaneously, the high strength and corrosion resistance of the battery casing provide reliable physical protection, preventing external factors from damaging the battery's internal structure. A reasonable electrical connection design and component layout ensure smooth current transmission within the battery, reducing resistance and energy loss. The selection of positive and negative electrode materials and the coating process guarantee good charge-discharge performance and cycle life. Furthermore, the stable sealing structure prevents electrolyte leakage and the entry of impurities such as moisture and oxygen, further maintaining the stability of the internal chemical environment of the battery, thereby ensuring the long-term stability of the battery's electrical performance. The battery's structural design utilizes common materials and mature manufacturing processes, facilitating large-scale production. The standardized design of the plastic parts and positive electrode structure enables efficient assembly and quality control during production, improving product production efficiency and quality consistency. Meanwhile, strict control over the packaging and testing processes ensures that every battery meets quality standards, reducing the defect rate. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic perspective view of the battery provided by this utility model.

[0026] Figure 2 This is a schematic top view of the battery provided by this utility model.

[0027] Figure 3 yes Figure 2 An adaptive cross-sectional view along the AA direction.

[0028] Figure 4 yes Figure 2 A magnified view of a section at point B.

[0029] Figure 5 This is a schematic top view of the plastic part body provided by this utility model.

[0030] Figure label:

[0031] 100. Plastic body; 102. Flow channel; 104. Terminal post; 106. Seal; 108. Ring body; 110. Boss body; 112. Battery. Detailed Implementation

[0032] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0033] like Figures 1 to 5 As shown, the first aspect of this utility model provides a plastic part, including a plastic part body 100, and a flow groove 102 is formed on the side of the plastic part body 100 facing the pole post 104. The flow groove 102 is recessed along the thickness direction of the plastic part and extends along the radial direction of the plastic part body 100.

[0034] According to the plastic part provided in the first aspect of this utility model, by establishing a fluid passage for helium detection using a flow channel 102 in the event of a missing seal 106, the detection capability for a missing seal 106 in the battery 112 is greatly improved. Helium has good permeability and detection sensitivity. When the seal 106 is missing, helium can quickly escape from inside the battery 112 to the external detection equipment through the flow channel 102, enabling the detection equipment to quickly and accurately detect the missing seal. This effectively prevents batteries 112 with missing seals 106 from entering the market, improving the quality and safety of the battery 112. This design achieves the function of a fluid passage for helium detection simply by forming a flow channel 102 on the plastic part body 100. Compared to other complex detection structures, this design reduces the number of parts and assembly steps, lowering production costs and reducing production difficulty. Furthermore, since the flow channel 102 is integrally formed with the plastic part body 100, the structure has high stability and is less prone to loosening or damage, ensuring the long-term reliability of the detection function. The annular structure of the plastic body 100 and the design of the flow channel 102 are highly compatible with common battery 112 terminal posts 104 and housing structures. This allows for easy application to battery 112 products of different specifications and models without requiring large-scale modifications to the overall structure of the battery 112.

[0035] Please continue reading Figures 1 to 5 The plastic body 100 is made of PPS (polyphenylene sulfide) plastic material, which has good high-temperature resistance, chemical corrosion resistance, and mechanical properties, meeting the requirements of the battery 112's operating environment. During mold manufacturing, high-precision CNC machining technology ensures that the dimensional accuracy of the plastic body 100 is controlled within a very small range. The plastic body 100 has an overall ring-shaped structure to accommodate the installation of the battery 112's terminal post 104. Its inner diameter matches the outer diameter of the terminal post 104, while the outer diameter is rationally designed based on the installation space of the battery 112's casing.

[0036] In the injection molding process, the mold cavity surface is designed with raised structures corresponding to the shape of the flow channel 102. When PPS plastic material is injected into the mold cavity under high temperature and pressure, it will form a flow channel 102 that is recessed along the thickness direction of the plastic part body 100 after cooling. To ensure the dimensional accuracy of the flow channel 102, precision electrical discharge machining and grinding processes are used during mold processing to control the width and depth errors of the flow channel 102 within a very small range. The flow channel 102 extends along the radial direction of the plastic part body 100, from near the inner edge of the electrode post 104 to near the outer edge, ensuring that an effective connection channel can be established between the inside and outside of the battery 112.

[0037] When the seal 106 is not installed, the helium gas inside the battery 112 can flow from the inside of the battery 112 to the outside through the flow channel 102. In terms of design, the opening of the flow channel 102 is connected to both the internal space of the battery 112 and the external detection environment, and the inner surface of the flow channel 102 is smoothed to reduce resistance to helium flow. Simultaneously, to prevent substances such as electrolyte from entering the flow channel 102 during normal use, a protective structure, such as small protrusions or chamfers, is provided at the opening of the flow channel 102 to block liquid entry without affecting helium flow.

[0038] According to one embodiment of the present invention, along the radial direction of the plastic part body 100, the width of the flow groove 102 is ( Figure 5 The value of W in the figure ranges from 1 mm to 1.8 mm.

[0039] In one embodiment of this utility model, the width of the flow groove 102 along the radial direction of the plastic part body 100 ranges from 1 mm to 1.8 mm. This width standard was determined through extensive experimentation and simulation analysis in actual production and design. During mold manufacturing, strict control is exercised over processing precision to ensure that the width of the flow groove 102 in each plastic part meets this requirement. For example, in the mold cavity design, high-precision CNC machining technology is used to control errors within a very small range, ensuring the consistency of the width of the flow groove 102.

[0040] By setting the width of the flow channel 102 to between 1 mm and 1.8 mm, sufficient width is ensured to allow helium gas to flow smoothly between the inside and outside of the battery 112, facilitating the effective detection of missing seals 106 through helium gas detection. If the width is too small, it may lead to poor helium gas flow, affecting the accuracy and sensitivity of the detection.

[0041] According to one embodiment of the present invention, along the thickness direction of the plastic part body 100, the depth of the flow groove 102 is ( Figure 4 The H in the figure is greater than or equal to 0.1 mm.

[0042] In one embodiment of this invention, the depth of the flow channel 102 along the thickness direction of the plastic part body 100 is greater than or equal to 0.1 mm. During production, the injection molding process of the plastic part is optimized, and parameters such as injection pressure, temperature, and mold closing depth are precisely controlled. By adjusting the parameter settings of the injection molding machine, the plastic material can form a flow channel 102 that meets the depth requirements when filling the mold. Simultaneously, during the mold design stage, the dimensions of the core are precisely calculated and manufactured to ensure the accuracy of the depth of the flow channel 102.

[0043] Sufficient depth ensures that the flow channel 102 can form an effective fluid passage. If the depth is too shallow, a continuous passage may not be formed, preventing helium from passing through normally and hindering effective communication between the inside and outside of the battery 112, thereby affecting the detection effect of the missing seal 106.

[0044] According to one embodiment of the present invention, at least two flow grooves 102 are formed at intervals on the plastic part body 100 along the circumferential direction of the plastic part body 100.

[0045] In one embodiment of this utility model, at least two flow channels 102 are formed at intervals on the plastic part body 100 along the circumferential direction. In terms of design, the position and spacing of the flow channels 102 are rationally planned according to the size of the plastic part and the structural characteristics of the battery 112. These flow channels 102 are manufactured using an integral molding process, with corresponding protrusions on the surface of the mold cavity, directly forming the spaced flow channels 102 during injection molding. Simultaneously, the positioning and calibration devices of the mold ensure the positional accuracy and spacing consistency of each flow channel 102.

[0046] Having at least two flow channels 102 increases the reliability and comprehensiveness of the detection. Compared to a single flow channel 102, at least two flow channels 102 establish fluid pathways at different locations. Even if some pathways are blocked by other factors, there are still other pathways available for helium detection, increasing the probability of detecting missing seals 106 and reducing the occurrence of missed detections.

[0047] According to one embodiment of the present invention, at least three flow grooves 102 are formed at intervals on the plastic part body 100 along the circumferential direction, and the spacing between two adjacent flow grooves 102 is equal.

[0048] In one embodiment of this utility model, at least three flow grooves 102 are formed at intervals on the plastic part body 100 along the circumferential direction, and the spacing between two adjacent flow grooves 102 is equal. During the manufacturing process, precision mold manufacturing technology and advanced processing equipment, such as high-precision electrical discharge machining tools, are used to finely process the mold to ensure that the position and spacing of each flow groove 102 meet the design requirements. After the mold processing is completed, strict testing and calibration are performed. The position and spacing of the flow grooves 102 are accurately measured using equipment such as a coordinate measuring machine to ensure that the error is within the allowable range.

[0049] The evenly distributed at least three flow channels 102 further optimize the detection effect. The equidistant setting allows for more balanced detection of the battery 112 from all angles, avoiding detection blind spots and ensuring that the missing seal 106 is more likely to be detected by helium gas detection, regardless of its location, thus improving the accuracy and stability of the detection.

[0050] According to one embodiment of the present invention, the plastic part body 100 includes:

[0051] An annular body 108 is disposed between the terminal post 104 and the battery 112 housing, and a flow groove 102 is formed on the side of the annular body 108 facing the terminal post 104;

[0052] The boss 110 is integrally formed with the annular body 108 and is formed on the outer edge of the annular body 108.

[0053] In one embodiment of this utility model, the plastic part body 100 includes an annular body 108 and a boss body 110. The annular body 108 is disposed between the terminal post 104 and the battery 112 casing, and a flow groove 102 is formed on the side of the annular body 108 facing the terminal post 104. The boss body 110 is integrally formed with the annular body 108 and is formed on the outer edge of the annular body 108. During the production of the plastic part, an injection molding process is used, injecting PPS plastic material into the mold cavity under high temperature and high pressure. The mold is designed as an integral structure, incorporating the shape features of the annular body 108 and the boss body 110. By precisely controlling the injection molding parameters, the connection between the annular body 108 and the boss body 110 is ensured to be firm, and the dimensional accuracy meets the requirements. Fine processing is performed on the core and cavity surfaces of the mold to make the surfaces of the annular body 108 and the boss body 110 smooth, ensuring product quality.

[0054] The annular body 108's structural design enables it to provide a good connection and seal between the terminal post 104 and the battery 112 casing, while also providing a suitable position for the flow channel 102. The boss 110 is integrally formed with the annular body 108, enhancing the overall structural strength of the plastic part body 100. Furthermore, the boss 110 provides positioning and protection, facilitating the installation of the plastic part in the battery 112 and reducing damage to the plastic part from external factors.

[0055] According to one embodiment of the present invention, a gap is formed between the inner edge of the boss body 110 and the outer edge of the pole post 104. In the case of the seal 106 being missing, the fluid passage and the gap together form a fluid passage.

[0056] In one embodiment of this invention, a gap is formed between the inner edge of the boss 110 and the outer edge of the pole post 104. When the seal 106 is not installed, the fluid passage and the gap together form a fluid passage. During the mold design stage, the dimensions of the boss 110 and the pole post 104, as well as their relative positional relationship, are precisely calculated to ensure that the gap dimensions meet the design requirements. During the manufacturing process, high-precision machining equipment and strict quality control ensure the machining accuracy of the boss 110 and the pole post 104, resulting in a uniform gap. For example, during the machining of the mold core and cavity, precision machining processes such as grinding and lapping are used to control the dimensional accuracy within a very small range.

[0057] The presence of the gap further expands the flow path of helium. When the seal 106 is missing, in addition to the flow groove 102, the gap can also participate in forming a fluid passage, giving helium more flow space, increasing the possibility of helium passing through, improving the reliability of detecting missing seals 106, and reducing the risk of missed detection.

[0058] According to one embodiment of the present invention, the side of the annular body 108 facing the pole post 104 is in close contact with the pole post 104.

[0059] In one embodiment of this invention, the annular body 108 is closely fitted to the pole post 104 on the side facing it. During the manufacturing process, the contact surfaces of the annular body 108 and the pole post 104 are finely processed to achieve a certain surface roughness standard, ensuring a good fit between them. During assembly, appropriate assembly processes and tooling are used to ensure that the annular body 108 is accurately installed on the pole post 104, and appropriate pressure is applied to ensure a tight fit between the annular body 108 and the pole post 104. For example, a positioning fixture is used to accurately place the annular body 108 on the pole post 104, and then a press is used to apply uniform pressure to achieve a tight connection between the two.

[0060] The tightly fitted structure ensures the airtightness of the battery 112 under normal conditions (when the seal 106 is installed correctly), preventing electrolyte leakage and gas escape. Simultaneously, when helium testing is performed with the seal 106 missing, it also helps guide helium through the fluid pathway formed by the flow channel 102 and the gap, improving the accuracy of the test.

[0061] A second aspect of this utility model provides a positive electrode structure, including an electrode post 104 and a plastic part as described above.

[0062] As the core conductive component of the positive electrode structure, the terminal 104 is made of a metal material with good conductivity and corrosion resistance, such as copper or aluminum alloy. The terminal 104 is designed in a cylindrical shape to ensure good fit and connection with the plastic parts and other components inside the battery 112. During the manufacturing process of the terminal 104, precision casting and machining processes are used to ensure the dimensional accuracy and surface quality of the terminal 104. One end of the terminal 104 is connected to the positive electrode active material inside the battery 112, achieving a reliable electrical connection through welding or pressing; the other end passes through the plastic parts for connection to external circuitry.

[0063] The plastic part adopts the design described in the first aspect embodiment, with the inner diameter of its annular structure matching the outer diameter of the terminal 104. During assembly, the mating surfaces of the terminal 104 and the plastic part are first cleaned and pre-treated to ensure a tight fit. Then, using a dedicated assembly tool, the plastic part is accurately fitted onto the terminal 104. Appropriate pressure is applied to create an interference fit between the plastic part and the terminal 104, or a sealing material such as adhesive is used to seal the fit, preventing electrolyte leakage and the entry of external impurities into the battery 112. Simultaneously, the flow groove 102 on the plastic part is ensured to correspond to the space around the terminal 104, so that a fluid path for helium detection can be successfully established even if the sealing element 106 is not installed.

[0064] To improve the overall stability of the positive electrode structure, a positioning structure, such as the cooperation of protrusions and grooves, is set at the connection between the electrode post 104 and the plastic part to ensure accurate alignment during assembly and to prevent relative displacement during the use of the battery 112. Furthermore, the material properties of the electrode post 104 and the plastic part are matched, taking into account their coefficients of thermal expansion and mechanical properties under different temperature and pressure conditions, to avoid structural damage or seal failure due to differences in material properties.

[0065] According to the positive electrode structure provided in the second aspect embodiment of this utility model, the good conductivity of the electrode post 104 and its reliable assembly with the plastic component ensure that the positive electrode structure can effectively transfer the electrical energy inside the battery 112 to the external circuit. Stable electrical connection reduces resistance and energy loss, improving the charging and discharging efficiency and performance stability of the battery 112. Simultaneously, the selection of corrosion-resistant materials ensures that the electrode post 104 will not experience performance degradation due to electrolyte erosion during long-term use, extending the service life of the battery 112. The tight fit and sealing measures between the plastic component and the electrode post 104 effectively prevent electrolyte leakage. This not only protects other internal components of the battery 112 from electrolyte corrosion but also avoids damage to the surrounding environment and equipment caused by electrolyte leakage. Furthermore, even in the event of a missing seal 106, the flow channel 102 of the plastic component can still function normally, allowing for timely detection of problems via helium gas testing, further improving the safety and reliability of the battery 112. The positive electrode structure design utilizes common materials and mature manufacturing processes, reducing production costs and manufacturing difficulty, and improving production efficiency and product quality consistency. In addition, since the assembly method of the terminal post 104 and the plastic parts is simple, the positive electrode structure is easy to disassemble and replace during the maintenance and repair of the battery 112, reducing maintenance costs and time.

[0066] like Figure 1 As shown, a third aspect embodiment of the present invention provides a battery 112, including the plastic parts as described above;

[0067] Or a positive electrode structure as described above.

[0068] The battery 112 adopts a cylindrical design, with a casing made of high-strength, corrosion-resistant metal materials, such as stainless steel, to protect the internal components. Internally, from the inside out, the battery 112 consists of a negative electrode, a separator, a positive electrode, and a plastic component (or a positive electrode structure containing a plastic component). The negative electrode uses graphite or other active materials, uniformly coated onto the negative electrode current collector. The positive electrode uses lithium cobalt oxide or other active materials, similarly coated onto the positive electrode current collector, which is typically aluminum foil. The separator is positioned between the positive and negative electrodes, isolating them and preventing short circuits while allowing lithium ions to pass through.

[0069] If a plastic component is used, it is installed at the top opening of the battery 112 casing using a specific assembly process, fitting tightly with the battery 112's terminal post 104. The annular structure of the plastic component fits perfectly onto the terminal post 104, and its flow groove 102 on the side facing the terminal post 104 communicates with the internal space of the battery 112, providing a fluid path for helium detection. If a positive electrode structure is used, the entire positive electrode structure is installed inside the battery 112 casing, with the terminal post 104 extending through the plastic component to the outside of the battery 112 for easy connection to external circuitry. During installation, the gap between the plastic component and the battery 112 casing is sealed with sealant or other sealing materials to ensure the battery 112's airtightness.

[0070] The negative current collector is connected to the battery 112 casing by welding or other methods, making the battery 112 casing part of the negative electrode; the positive current collector is connected to the terminal 104, through which electrical energy is transferred to the outside of the battery 112. During the assembly of the battery 112, strict quality inspection is carried out on the electrical connection parts to ensure that the connection is firm and the resistance is low, so as to ensure the stable electrical performance of the battery 112.

[0071] After the internal components are installed and electrically connected, the battery 112 is encapsulated. First, the top opening of the battery 112 casing is sealed, and the plastic part (or positive electrode structure) is fixed to the battery 112 casing using processes such as laser welding to form a closed space. Then, the battery 112 undergoes visual inspection and performance testing to ensure that the battery 112 meets quality standards.

[0072] According to the battery 112 provided in the third aspect embodiment of this utility model, the flow groove 102 in the plastic part or positive electrode structure is designed to provide an effective fluid passage for helium gas detection, which can promptly detect the leakage of the seal 106. This greatly reduces the probability of safety hazards such as electrolyte leakage and short circuit caused by poor sealing of the battery 112, and improves the safety of the battery 112 during use. At the same time, the high strength and corrosion resistance of the battery 112 shell also provide reliable physical protection for the battery 112, preventing external factors from damaging the battery 112. The reasonable electrical connection design and component layout ensure the smooth transmission of current inside the battery 112, reducing resistance and energy loss. The selection of positive and negative electrode materials and coating process ensure that the battery 112 has good charge and discharge performance and cycle life. In addition, the stable sealing structure prevents electrolyte leakage and the entry of impurities such as moisture and oxygen, further maintaining the stability of the internal chemical environment of the battery 112, thereby ensuring the long-term stability of the battery 112's electrical performance. The structural design of the battery 112 adopts common materials and mature manufacturing processes, which is conducive to large-scale production. The standardized design of plastic components and the positive electrode structure enables efficient assembly and quality control during the production process, improving production efficiency and quality consistency. Meanwhile, strict control during packaging and testing ensures that every 112 battery meets quality standards, reducing the defect rate.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A plastic part, characterized in that, Includes a plastic part body, on the side of the plastic part body facing the pole post, a flow groove is formed, the flow groove is recessed along the thickness direction of the plastic part and extends along the radial direction of the plastic part body. The plastic part body includes: An annular body is disposed between the terminal post and the battery casing, and the flow groove is formed on the side of the annular body facing the terminal post; The boss is integrally formed with the annular body and is located on the outer edge of the annular body.

2. The plastic part according to claim 1, characterized in that, Along the radial direction of the plastic part body, the width of the flow groove ranges from 1 mm to 1.8 mm.

3. The plastic part according to claim 1, characterized in that, Along the thickness direction of the plastic part body, the depth of the flow groove is greater than or equal to 0.1 mm.

4. The plastic part according to claim 1, characterized in that, At least two flow grooves are formed at intervals on the plastic part body along the circumferential direction of the plastic part body.

5. The plastic part according to claim 4, characterized in that, Along the circumferential direction of the plastic part body, at least three flow grooves are formed at intervals on the plastic part body, and the spacing between two adjacent flow grooves is equal.

6. The plastic part according to claim 1, characterized in that, A gap is formed between the inner edge of the boss and the outer edge of the pole post. In the case of a missing seal, the flow groove and the gap together form a fluid passage.

7. The plastic part according to claim 1, characterized in that, The annular body is in close contact with the pole on the side facing the pole.

8. A positive electrode structure, characterized in that, Includes poles and plastic parts as described in any one of claims 1 to 7.

9. A battery, characterized in that, Includes plastic parts as described in any one of claims 1 to 7; Or the positive electrode structure as described in claim 8.

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