Battery case structure, battery, and electric device

Abstract

The utility model relates to battery field provides a kind of shell structure for battery, battery and electric equipment.Shell structure for battery includes shell body, and guide slot is formed in the side of shell body towards down plastic, and guide slot is recessed along the thickness direction of shell body and extends along the radial direction of shell body.The shell for battery can effectively solve the problem of difficult detection when sealing element is missed.By the setting of guide slot, in the case of missing sealing element, reliable helium detection fluid passage can be established between the inside and outside of battery.When helium detection is carried out on battery, if battery exists the case of missing sealing element, helium filled in the inside of battery will flow to external detection equipment smoothly through guide slot;The accuracy and sensitivity of detection are greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of batteries, and provides a battery casing structure, a battery, and an electrical device. Background Technology

[0002] In the production of cylindrical batteries, the common positive electrode structure includes components such as an upper plastic layer, battery casing, sealing ring, lower plastic layer, riveting block, and terminal post, which are riveted together to form a sealed internal space. However, in actual manufacturing, there is a risk of missing sealing rings, which may result in the battery not being effectively detected during subsequent helium gas testing on the production line. Although some lower plastic layers are made of one-piece molded PP material, which has a certain degree of sealing and can deform during the riveting process to provide a certain sealing effect, the inherent deformation of PP material means that production line testing equipment, such as helium gas testing methods, cannot accurately detect cases of missing sealing rings during battery production.

[0003] Considering the aforementioned issues, the slight deformation caused by internal pressure or vibration during the battery's gas generation process may lead to seal failure, resulting in battery leakage. Therefore, even if defective batteries lacking a sealing ring pass the initial helium gas test, these batteries still pose a risk of leakage during subsequent use, directly impacting their safety and stability. Existing testing methods cannot completely prevent such unstable defective products, caused by material properties, from entering the market, which has become a critical problem that battery manufacturers urgently need to solve. Utility Model Content

[0004] This utility model provides a battery housing structure to solve the defect in related technologies where ineffective detection is impossible after a seal is missing.

[0005] This utility model embodiment also provides a battery.

[0006] This utility model embodiment also provides an electrical device.

[0007] The first aspect of this utility model provides a battery housing structure, including a housing body, wherein a guide groove is formed on the side of the housing body facing downward plastic, the guide groove being recessed along the thickness direction of the housing body and extending along the radial direction of the housing body.

[0008] According to one embodiment of the present invention, the width of the guide groove in the radial direction of the housing body ranges from 1 mm to 1.8 mm.

[0009] According to one embodiment of the present invention, the depth of the guide groove along the thickness direction of the housing body ranges from 0.1 mm to 0.2 mm.

[0010] According to one embodiment of the present invention, at least two guide grooves are formed at intervals on the housing body along the circumferential direction of the housing body.

[0011] According to one embodiment of the present invention, at least three guide grooves are formed at intervals on the housing body along the circumferential direction of the housing body, and the spacing between two adjacent guide grooves is equal.

[0012] According to one embodiment of the present invention, the housing body includes:

[0013] Sidewall portion, the sidewall portion being used to enclose a receiving space for accommodating battery cells;

[0014] An end portion is formed at the end of the sidewall portion and corresponds to the lower plastic, and a guide groove is formed on the side of the end portion facing the lower plastic.

[0015] According to one embodiment of the present invention, the end portion includes:

[0016] A connecting segment formed at the end of the sidewall portion;

[0017] A crimping section is connected to the side of the connecting section away from the side wall portion. The crimping section is crimped between the upper plastic and the lower plastic. The guide groove is formed on the side of the crimping section facing the lower plastic.

[0018] According to one embodiment of the present invention, a gap is formed between the upper plastic and the pressing section.

[0019] A second aspect of this utility model provides a battery, including the battery housing structure as described above.

[0020] A third aspect of this utility model provides an electrical device, including the battery housing structure described above;

[0021] or,

[0022] The battery mentioned above.

[0023] According to the battery casing provided in the first aspect of this utility model, the design of the guide groove effectively solves the problem of difficulty in detecting missing seals. In traditional detection methods, due to the material properties and the complexity of the sealing structure, batteries with missing seals are prone to being missed during helium testing. However, in this battery casing structure, the guide groove establishes a reliable helium detection fluid path between the inside and outside of the battery in the case of missing seals. When the battery is subjected to helium testing, if there is a missing seal, the helium filling the battery will flow smoothly to the external testing equipment through the guide groove, greatly improving the accuracy and sensitivity of the detection. Even if the internal pressure of the battery is low or the amount of helium leakage is very small, it can be smoothly discharged through the guide groove, allowing the testing equipment to detect it in time. This prevents batteries with missing seals from entering subsequent production stages or the market, ensuring the safety and stability of the battery and reducing the safety risks and economic losses caused by battery leakage.

[0024] According to the second aspect embodiment of this utility model, the battery with the aforementioned battery casing structure possesses higher quality reliability and safety. Due to the presence of the guide groove, even if a seal is missing during battery production, it can be detected promptly during the helium gas detection stage. This feature significantly reduces the probability of defective batteries entering the market, avoiding a series of problems that may be caused by battery leakage, such as battery performance degradation, fire, and explosion, thus ensuring user safety.

[0025] The electrical equipment provided according to the third aspect of this utility model, whether including a battery casing structure or the aforementioned battery, greatly improves safety. Because the battery casing structure can effectively detect missing seals, it prevents the use of batteries with potential safety hazards, reduces the risk of equipment malfunction, fire, or even explosion due to battery leakage, and protects the personal and property safety of users. Attached Figure Description

[0026] 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.

[0027] Figure 1 This is a schematic perspective view of the battery provided by this utility model.

[0028] Figure 2 This is a schematic top view of the battery provided by this utility model.

[0029] Figure 3 yes Figure 2 A schematic cross-sectional view along the AA direction.

[0030] Figure 4 yes Figure 3 A magnified view of a section at point B in the middle.

[0031] Figure 5 This is a schematic top view of the shell body.

[0032] Figure label:

[0033] 100. Housing body; 102. Lower plastic; 104. Guide groove; 106. Seal; 108. Side wall; 110. End; 112. Connecting section; 114. Press-fit section; 116. Upper plastic. Detailed Implementation

[0034] 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.

[0035] like Figures 1 to 5 As shown, the first aspect of this utility model provides a battery housing structure, including a housing body 100, and a guide groove 104 formed on the side of the housing body 100 facing downward plastic 102. The guide groove 104 is recessed along the thickness direction of the housing body 100 and extends along the radial direction of the housing body 100. In the case of missing sealing member 106, the guide groove 104 is adapted to establish a fluid passage for helium detection between the inside and outside of the battery.

[0036] According to the battery casing provided in the first aspect of this utility model, the design of the guide groove 104 effectively solves the problem of difficulty in detecting missing seals 106. In traditional detection methods, due to the material properties and the complexity of the sealing structure, batteries with missing seals 106 are prone to being missed during helium testing. However, in this battery casing structure, the guide groove 104 establishes a reliable helium detection fluid path between the inside and outside of the battery even when the seal 106 is missing. When the battery is subjected to helium testing, if the battery has a missing seal 106, the helium filling the battery will flow smoothly to the external testing equipment through the guide groove 104, greatly improving the accuracy and sensitivity of the detection. Even if the internal pressure of the battery is low or the amount of helium leakage is very small, it can be smoothly discharged through the guide groove 104, allowing the testing equipment to detect it in time. This prevents batteries with missing seals 106 from entering subsequent production stages or the market, ensuring the safety and stability of the battery and reducing the safety risks and economic losses caused by battery leakage.

[0037] Please continue reading Figures 1 to 5 In the design of the battery casing 100, the guide groove 104 is positioned on the side facing the lower plastic 102. This position is chosen based on the internal structure of the battery and testing requirements. The guide groove 104 is recessed along the thickness direction of the casing 100, and the depth of the recess is precisely designed to ensure that the overall structural strength of the casing is not affected while effectively accommodating the flow of helium gas. At the same time, the guide groove 104 extends along the radial direction of the casing 100. This radial extension design allows the guide groove 104 to gradually extend from a position near the center inside the battery to the edge area near the outside of the battery, forming a channel that runs through the inside and outside of the battery.

[0038] In the actual manufacturing process, high-precision mold processing technology can be used to ensure the dimensional accuracy and shape accuracy of the guide groove 104. For example, using CNC machining equipment, the movement trajectory of the tool can be precisely controlled through a pre-programmed program to machine the guide groove 104 that meets the design requirements on the housing body 100. In terms of material selection, considering the battery's operating environment and performance requirements, metal materials or high-performance plastics with good corrosion resistance and mechanical strength are selected to ensure that the guide groove 104 maintains its functionality throughout the battery's entire life cycle.

[0039] According to one embodiment of the present invention, the width of the guide groove 104 along the radial direction of the housing body 100 ranges from 1 mm to 1.8 mm.

[0040] In one embodiment of this invention, the width of the guide groove 104 is designed to be 1 mm to 1.8 mm. This can be achieved through machining, by setting a tool of appropriate width on a mold to cut the housing body 100 to ensure precision. This width design ensures that, even if the seal 106 is not installed, helium gas has sufficient channel space to flow from the inside of the battery to the outside.

[0041] When the width of the guide groove 104 reaches this standard, the accuracy of helium detection can be effectively improved during the helium gas detection process. A sufficiently wide guide groove 104 allows helium to pass through smoothly, avoiding obstruction of helium flow due to an excessively narrow channel. This enables the detection equipment to accurately detect cases where the seal 106 is missing, reducing the flow of defective products into subsequent stages.

[0042] According to one embodiment of the present invention, the depth of the guide groove 104 along the thickness direction of the housing body 100 ranges from 0.1 mm to 0.2 mm.

[0043] In one embodiment of this invention, a high-precision mold manufacturing process can be used, such as electrical discharge machining (EDM), to precisely control the depth of the guide groove 104 to 0.15 mm. This depth ensures that the guide groove 104 effectively forms a fluid passage on the shell without compromising the structural strength of the shell due to excessive depth.

[0044] The appropriate depth of the guide groove 104 ensures that, on the one hand, a fluid passage for helium detection can be successfully established inside and outside the battery when the seal 106 is missing; on the other hand, the guide groove 104 will not weaken the structural strength of the casing due to being too deep, thus avoiding safety problems such as cracking and leakage due to insufficient casing strength during battery use, and ensuring the safety and stability of the battery.

[0045] According to one embodiment of the present invention, at least two guide grooves 104 are formed at intervals on the housing body 100 along the circumferential direction of the housing body 100.

[0046] In one embodiment of this utility model, when producing the shell body 100, by setting multiple spaced protrusions on the mold, two guide grooves 104 are injection molded at one time during the shell forming process. The two guide grooves 104 are evenly distributed around the shell body 100, with an interval angle of 180°.

[0047] Multiple guide channels 104 increase the number of detection points during helium gas detection. Even if some guide channels 104 may become blocked due to minor deviations in the production process, other guide channels 104 can still ensure the smooth flow of fluid, thereby improving the reliability of detection and ensuring that batteries with missing seals 106 can be detected more comprehensively and accurately.

[0048] According to one embodiment of the present invention, at least three guide grooves 104 are formed at intervals on the housing body 100 along the circumferential direction, and the spacing between two adjacent guide grooves 104 is equal.

[0049] In one embodiment of this invention, at least three guide grooves 104 are formed at intervals along the circumferential direction of the housing body 100, with equal spacing between adjacent guide grooves 104. During manufacturing, the position and spacing of the guide grooves 104 can be precisely controlled using automated processing equipment, such as computer-aided design and computer-aided manufacturing technology. Taking the formation of three guide grooves 104 as an example, the interval angle between adjacent guide grooves 104 is 120°, which can be achieved by milling using a CNC machine tool.

[0050] The evenly distributed guide grooves 104 further optimize the fluid pathway layout for helium detection. Even with a missing seal 106, helium can flow more quickly and evenly from the inside of the battery to the outside through the guide grooves 104, regardless of the battery's orientation. This significantly improves the sensitivity and accuracy of helium detection and reduces the risk of missed detections.

[0051] According to one embodiment of the present invention, the housing body 100 includes:

[0052] Side wall portion 108, the side wall portion 108 is used to enclose a receiving space for accommodating battery cells;

[0053] End portion 110 is formed on the side wall portion 108 and corresponds to the lower plastic 102, and guide groove 104 is formed on the side of end portion 110 facing the lower plastic 102.

[0054] In one embodiment of this utility model, the housing body 100 includes a sidewall portion 108 and an end portion 110. The sidewall portion 108 is used to enclose a receiving space for accommodating battery cells. The end portion 110 is formed at the end portion 110 of the sidewall portion 108 and corresponds to the lower plastic 102. A guide groove 104 is formed on the side of the end portion 110 facing the lower plastic 102. In terms of manufacturing process, the sidewall portion 108 with a certain thickness and shape can be first produced by a stretching process, then the end portion 110 can be formed on the sidewall portion 108, and then the guide groove 104 can be machined on the side of the end portion 110 facing the lower plastic 102.

[0055] This structural design allows for a more rational placement of the guide groove 104. During helium gas testing, the guide groove 104 can directly communicate with the inside of the battery and is located near the position where the seal 106 may be missing, facilitating rapid helium outflow and improving testing efficiency. Simultaneously, this structure ensures stable housing space for the battery cells, preventing the guide groove 104 from affecting normal battery assembly and use.

[0056] According to one embodiment of the present invention, the end portion 110 includes:

[0057] Connecting segment 112 is formed at the end 110 of the sidewall portion 108;

[0058] The crimping section 114 is connected to the side of the connecting section 112 away from the side wall portion 108. The crimping section 114 is crimped between the upper plastic 116 and the lower plastic 102. The guide groove 104 is formed on the side of the crimping section 114 facing the lower plastic 102.

[0059] In one embodiment of this utility model, in actual operation, the connecting section 112 and the pressing section 114 can be integrally formed by stamping process, and then the upper plastic 116, the lower plastic 102 and the pressing section 114 are assembled. A certain pressure is applied by the pressing machine to make the pressing section 114 tightly pressed between the upper plastic 116 and the lower plastic 102.

[0060] The guide groove 104 is positioned on the crimping section 114, allowing it to be closer to the sealing area. When the seal 106 is not installed, helium gas can flow more directly from inside the battery through the guide groove 104, improving detection accuracy. Furthermore, the structural design of the crimping section 114 enhances the connection stability between the upper and lower plastic parts 102 and the casing, ensuring the overall reliability of the battery structure.

[0061] According to one embodiment of the present invention, a gap is formed between the upper plastic 116 and the pressing section 114.

[0062] In one embodiment of this invention, during assembly, by controlling the processing precision of the upper plastic 116 and the pressing section 114, a gap of 0.5 mm between them can be ensured. During helium testing, helium gas first enters the guide groove 104 from inside the battery, then enters the gap between the upper plastic 116 and the pressing section 114 through the guide groove 104, and finally flows to the external testing equipment.

[0063] The combined effect of the gap and the guide channel 104 expands the flow path of helium, increasing the possibility of helium leakage. Even if the guide channel 104 is partially blocked, the gap can serve as a backup channel to ensure that helium can flow out smoothly, further improving the accuracy of detecting missing seals 106 and effectively reducing the probability of defective products leaking out.

[0064] A second aspect of this utility model provides a battery, including the battery housing structure as described above.

[0065] The battery provided in the second aspect of this utility model adopts the aforementioned battery housing structure as a key component in its overall architecture. The guide groove 104 in this battery housing structure is designed and constructed on the side of the housing body 100 facing the downward-facing plastic 102.

[0066] From the battery assembly process, the battery cells are first precisely placed within the accommodating space enclosed by the side wall 108 of the casing body 100, providing a stable physical environment for the cells. Next, after the cells are installed, the upper plastic 116, lower plastic 102, and casing with guide grooves 104 are assembled. Specifically, the crimping section 114 at the end 110 is precisely crimped between the upper plastic 116 and lower plastic 102, ensuring a tight fit between the entire battery structure. During this process, it is ensured that the guide grooves 104 are accurately positioned and correctly connected to the internal space of the battery and the external environment.

[0067] In the battery manufacturing process, strict control is exercised over the dimensional accuracy of each component to ensure the compatibility of the battery casing structure with other components. High-precision molds and advanced manufacturing processes ensure minimal tolerances between the upper plastic 116, lower plastic 102, and the casing, achieving excellent sealing and a stable structure. Simultaneously, the internal electrical connections of the battery are carefully considered in relation to the casing structure, with circuit layout optimized to ensure stable and safe current transmission during normal operation.

[0068] The battery provided according to the second aspect of this utility model, by adopting the above-described battery casing structure, possesses higher quality reliability and safety. Due to the presence of the guide groove 104, even if the seal 106 is missing during battery production, it can be detected promptly during the helium gas detection stage. This feature significantly reduces the probability of defective batteries entering the market, avoiding a series of problems that may be caused by battery leakage, such as battery performance degradation, fire, and explosion, thus ensuring user safety.

[0069] From a battery performance perspective, this design does not negatively impact the normal charging and discharging process. On the contrary, the optimized casing structure helps dissipate internal heat to some extent, improving the battery's heat dissipation performance and thus enhancing its stability and lifespan under high-load operating conditions. Furthermore, accurate helium testing ensures that every battery leaving the factory meets quality standards, enhancing the product's market competitiveness, establishing a positive brand image for battery manufacturers, and promoting the overall development of the battery industry.

[0070] A third aspect of this utility model provides an electrical device, including the battery housing structure described above;

[0071] or,

[0072] The battery mentioned above.

[0073] In the third aspect embodiment of this utility model, when the electrical device includes the aforementioned battery housing structure, the battery housing structure with the guide groove 104 can be integrated into the battery compartment of the device, ensuring that the position of the guide groove 104 is not interfered with by other components and that it can perform its detection function normally. During installation, the battery housing structure is securely fixed inside the device using a fixing bracket or slot, ensuring that it will not shift or shake during device operation. Simultaneously, considering the overall sealing and protection requirements of the device, the contact points between the battery compartment and the external environment are sealed to prevent dust, moisture, and other impurities from entering and affecting battery performance and the detection effect of the guide groove 104.

[0074] When using electrical equipment containing the aforementioned batteries, a dedicated battery mounting slot and connection circuit can be designed according to the battery's shape, size, and interface type to ensure easy battery installation and stable, reliable electrical connections. The overall structural design of the equipment fully considers the battery's heat dissipation requirements. Through reasonable airflow design or the application of heat-dissipating materials, the battery can maintain a suitable operating temperature during equipment operation, preventing overheating from affecting battery life and performance. Simultaneously, in conjunction with the battery's detection function, a corresponding detection feedback mechanism is integrated into the equipment's control system. When the battery undergoes helium gas detection, the equipment can promptly obtain the detection results and provide corresponding prompts, allowing users to easily understand the battery's status.

[0075] The electrical equipment provided according to the third aspect embodiment of this utility model, whether including a battery housing structure or the aforementioned battery, greatly improves safety. Because the battery housing structure can effectively detect cases where the seal 106 is missing, it prevents the use of batteries with potential safety hazards, reduces the risk of equipment malfunction, fire, or even explosion due to battery leakage, and protects the personal and property safety of users.

[0076] 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 battery casing structure, characterized in that, Includes a housing body (100), on which a guide groove (104) is formed on the side of the housing body (100) facing the lower plastic (102), the guide groove (104) being recessed along the thickness direction of the housing body (100) and extending along the radial direction of the housing body (100).

2. The battery casing structure according to claim 1, characterized in that, Along the radial direction of the housing body (100), the width of the guide groove (104) ranges from 1 mm to 1.8 mm.

3. The battery casing structure according to claim 1, characterized in that, Along the thickness direction of the housing body (100), the depth of the guide groove (104) ranges from 0.1 mm to 0.2 mm.

4. The battery casing structure according to claim 1, characterized in that, At least two guide grooves (104) are formed at intervals on the housing body (100) along the circumferential direction of the housing body (100).

5. The battery casing structure according to claim 1, characterized in that, Along the circumferential direction of the housing body (100), at least three guide grooves (104) are formed at intervals on the housing body (100), and the spacing between two adjacent guide grooves (104) is equal.

6. The battery casing structure according to any one of claims 1 to 5, characterized in that, The housing body (100) includes: Side wall portion (108), the side wall portion (108) is used to enclose a receiving space for accommodating battery cells; An end (110) is formed at the end (110) of the sidewall portion (108) and corresponds to the lower plastic (102), and a guide groove (104) is formed on the side of the end (110) facing the lower plastic (102).

7. The battery casing structure according to claim 6, characterized in that, The end portion (110) includes: A connecting segment (112) is formed at the end (110) of the sidewall portion (108). A crimping section (114) is connected to the side of the connecting section (112) away from the sidewall portion (108). The crimping section (114) is crimped between the upper plastic (116) and the lower plastic (102). The guide groove (104) is formed on the side of the crimping section (114) facing the lower plastic (102).

8. The battery housing structure according to claim 7, characterized in that, A gap is formed between the upper plastic (116) and the pressing section (114).

9. A battery, characterized in that, Includes a battery housing structure as described in any one of claims 1 to 8.

10. An electrical appliance, characterized in that, Includes a battery housing structure as described in any one of claims 1 to 8; or, The battery as described in claim 9.

Images