Cover plate assembly, shell and battery

Abstract

The utility model relates to the field of batteries, and provides a cover plate assembly, a shell and a battery. The cover plate assembly comprises a plastic part, a mounting groove is formed in the plastic part, and a liquid drainage flow channel penetrating through the groove side wall is formed in at least one groove side wall of the mounting groove in the length direction of the cover plate assembly. And the pole bottom plate is mounted in the mounting groove. The arrangement of the liquid discharge flow channel in the cover plate assembly provides an effective discharge channel for the electrolyte. In a battery liquid injection process, electrolyte may remain in a gap between a pole bottom plate and a mounting groove. And the liquid discharging flow channel can discharge the accumulated electrolyte in time, so that the electrolyte is prevented from being accumulated in the gap. And the electrolyte is discharged through the liquid discharge runner, so that the risk can be effectively reduced, and the safety and reliability of the battery are improved. And the pole bottom plate is mounted in the mounting groove, so that the connection stability between the pole and the internal electrode of the battery can be ensured. The stable connection can reduce the contact resistance and improve the charging and discharging efficiency of the battery.

Description

Technical Field

[0001] This utility model relates to the field of batteries, and provides a cover plate assembly, a housing, and a battery. Background Technology

[0002] During lithium battery manufacturing, a certain gap typically arises during the assembly of the terminal block base plate and the insulating plastic component at the bottom of the top cover due to manufacturing tolerances. After the battery is filled with electrolyte, electrolyte accumulates in these gaps. At low temperatures, especially when the battery voltage is high, the water in this electrolyte crystallizes, forming crystalline substances. These crystalline substances can connect the bottom of the negative electrode post to the battery casing, severely affecting the insulation performance of the battery cover, leading to battery safety issues and performance degradation, and impacting the overall safety and reliability of the battery. Utility Model Content

[0003] This utility model provides a cover plate assembly to solve the defect of electrolyte accumulation in related technologies.

[0004] This utility model embodiment also provides a housing.

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

[0006] A first aspect of this utility model provides a cover plate assembly, comprising:

[0007] A plastic part having a mounting groove formed thereon, and along the length direction of the cover plate assembly, a drain channel penetrating the sidewall of at least one groove is formed in the mounting groove.

[0008] The pole base plate is installed in the mounting slot.

[0009] According to one embodiment of the present invention, along the length direction of the cover plate assembly, the mounting groove includes a first groove sidewall and a second groove sidewall disposed opposite to each other, and the drain channel is formed in the first groove sidewall and the second groove sidewall.

[0010] According to one embodiment of the present invention, the drainage channel includes a through hole, which extends through the first tank sidewall and the second tank sidewall along the length of the cover plate assembly.

[0011] According to one embodiment of the present invention, along the width direction of the cover plate assembly, there are at least two through holes, and the at least two through holes are symmetrically arranged with respect to the center line of the width direction of the mounting groove;

[0012] or,

[0013] Along the length of the cover plate assembly, there are at least two through holes, and the at least two through holes are symmetrically arranged about the center line of the length of the mounting groove.

[0014] or,

[0015] Along the length of the cover plate assembly, there are at least two sets of through holes, each set including at least two through holes. The at least two sets of through holes are symmetrically arranged with respect to the center line of the length direction of the mounting groove, and the through holes in each set are symmetrically arranged with respect to the center line of the width direction of the mounting groove.

[0016] According to one embodiment of the present invention, a first mounting portion is formed in the mounting groove, and a second mounting portion is formed on the pole base plate. The pole base plate is adapted to be mounted in the mounting groove by the cooperation of the first mounting portion and the second mounting portion.

[0017] According to one embodiment of the present invention, a gap is formed between the edge of the second mounting portion and the sidewall of the mounting groove.

[0018] According to one embodiment of the present invention, the first mounting part is integrally formed with the plastic part, and the second mounting part is integrally formed with the pole base plate.

[0019] According to one embodiment of the present invention, the drain channel is spaced apart from the edge of the plastic part.

[0020] A second aspect of this utility model provides a housing, including a housing body, on which the aforementioned cover plate assembly is mounted.

[0021] A third aspect of this utility model provides a battery, including the cover plate assembly described above;

[0022] Or the aforementioned casing.

[0023] According to the cover assembly provided in the first aspect of this utility model, the drainage channel provides an effective outlet for the electrolyte. During battery filling, electrolyte may remain in the gap between the terminal base plate and the mounting groove. The drainage channel can promptly drain this accumulated electrolyte, preventing its accumulation in the gap. Draining the electrolyte through the drainage channel effectively reduces this risk and improves the safety and reliability of the battery. The terminal base plate, installed in the mounting groove, ensures the stability of the connection between the terminal and the internal electrodes of the battery. A stable connection reduces contact resistance and improves the charging and discharging efficiency of the battery. Simultaneously, the insulating properties of the plastic parts effectively isolate the terminal from other components, preventing short circuits and further ensuring the stability of the battery's electrical performance.

[0024] According to the second aspect of the present invention, the cover assembly is tightly connected to the housing body, forming a stable integral structure. When the battery is subjected to external impact or vibration, the cover assembly can work together with the housing body to distribute the force, effectively dispersing the external force and preventing structural damage caused by excessive local stress. This enhances the overall structural strength and stability of the battery and extends its service life. The reasonable connection method and positioning structure ensure a good seal between the cover assembly and the housing body. This effectively prevents electrolyte leakage, avoiding corrosion and pollution of the external environment caused by the electrolyte; it also prevents external air, moisture, and other impurities from entering the battery, maintaining the stability of the internal environment, protecting the electrodes and other components inside the battery, and improving the safety and reliability of the battery.

[0025] According to the battery provided in the third aspect embodiment of this utility model, the drain channel effectively solves the problem of electrolyte accumulation, reducing safety hazards such as short circuits and corrosion caused by electrolyte buildup. Especially in low-temperature environments, it avoids damage to the internal structure of the battery caused by electrolyte crystallization, thereby improving the safety of the battery under different environmental conditions. The casing provides a robust outer shell for the internal components of the battery, effectively resisting external impacts, compression, and other mechanical stresses, preventing damage to the internal structure of the battery, and extending the battery's service life. 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 cover plate assembly provided by this utility model from one angle.

[0028] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0029] Figure 3 This is a schematic perspective view of the cover plate assembly provided by this utility model from another angle.

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

[0031] Figure label:

[0032] 100. Plastic part; 102. Mounting groove; 104. Drainage channel; 106. Base plate of pole post; 108. Side wall of the first groove; 110. Side wall of the second groove; 112. First mounting part; 114. Second mounting part. Detailed Implementation

[0033] 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.

[0034] like Figures 1 to 4 As shown, a first aspect embodiment of the present invention provides a cover plate assembly, comprising:

[0035] The plastic part 100 has an installation groove 102 formed on it. Along the length direction of the cover plate assembly, a drain channel 104 is formed through the groove sidewall of at least one groove of the installation groove 102.

[0036] The pole base plate 106 is installed in the mounting groove 102.

[0037] According to the cover assembly provided in the first aspect of this utility model, the drain channel 104 provides an effective drainage channel for the electrolyte. During the battery filling process, electrolyte may remain in the gap between the terminal base plate 106 and the mounting groove 102. The drain channel 104 can drain this accumulated electrolyte in a timely manner, preventing electrolyte from accumulating in the gap. Draining the electrolyte through the drain channel 104 can effectively reduce this risk and improve the safety and reliability of the battery. The terminal base plate 106 is installed in the mounting groove 102, which can ensure the connection stability between the terminal and the internal electrodes of the battery. Stable connection can reduce contact resistance and improve the charging and discharging efficiency of the battery. At the same time, the insulation performance of the plastic part 100 can effectively isolate the terminal from other components, prevent short circuits, and further ensure the stability of the battery's electrical performance.

[0038] Please continue reading Figures 1 to 4 In the first aspect of this utility model, the plastic part 100 is usually selected from engineering plastics with good insulation properties, chemical corrosion resistance and certain mechanical strength.

[0039] When manufacturing the plastic part 100, the mounting groove 102 can be formed by injection molding. The formation of the drainage channel 104 can also rely on the injection mold. If the drainage channel 104 is designed as a through hole, a slender core will be set at the corresponding position on the mold. During injection molding, the plastic will flow around the core and form a through hole that penetrates the thickness direction of the groove sidewall after cooling.

[0040] The base plate 106 is generally made of a metal material with good electrical conductivity, such as copper, aluminum, or their alloys. These metal materials can effectively conduct current and reduce energy loss during battery charging and discharging.

[0041] When installing the electrode base plate 106 into the mounting groove 102 of the plastic part 100, it is usually done manually or by automated equipment. First, align the electrode base plate 106 with the mounting groove 102 to ensure accurate positioning. Then, apply a certain amount of pressure to make the electrode base plate 106 smoothly embed into the mounting groove 102. To ensure a secure installation, a suitable amount of sealant may be applied between the mounting groove 102 and the electrode base plate 106, or mechanical connection methods such as clips or slots may be used for auxiliary fixation.

[0042] According to one embodiment of the present invention, along the length direction of the cover plate assembly, the mounting groove 102 includes a first groove sidewall 108 and a second groove sidewall 110 disposed opposite to each other, and a drain channel 104 is formed in the first groove sidewall 108 and the second groove sidewall 110.

[0043] In one embodiment of this utility model, when manufacturing the plastic part 100, the mounting groove 102 has a first groove sidewall 108 and a second groove sidewall 110 arranged opposite to each other. Through injection molding, mold structures forming drainage channels 104 are respectively provided at corresponding positions on the first groove sidewall 108 and the second groove sidewall 110. If the drainage channel 104 is a through hole, a core is provided at the corresponding position on the mold. During injection molding, the plastic material wraps around the core, and after cooling, a through hole is formed penetrating the sidewall.

[0044] The drain channels 104 are provided on two opposite sidewalls, which can more comprehensively drain the electrolyte accumulated in different locations within the mounting tank 102. Compared to providing drain channels 104 on only one sidewall, this design can avoid the situation where electrolyte cannot be drained due to accumulation on one side of the mounting tank 102, improving the comprehensiveness and efficiency of draining, more effectively reducing electrolyte accumulation, lowering the risk of battery failure caused by electrolyte crystallization, and enhancing battery safety and stability.

[0045] According to one embodiment of the present invention, the drain channel 104 includes a through hole that extends through the first groove sidewall 108 and the second groove sidewall 110 along the length of the cover plate assembly.

[0046] In one embodiment of this invention, during the mold manufacturing process, the size of the through-hole is generally between 0.5 mm and 2 mm. During injection molding, the plastic material is ensured to flow uniformly around the core, forming a through-hole penetrating the thickness direction of both sidewalls after cooling and solidification. To ensure the quality of the through-hole, injection molding process parameters such as injection pressure, temperature, and cooling time are strictly controlled to avoid problems such as through-hole blockage and uneven hole diameter. Furthermore, after production, the through-holes of each plastic part are inspected to ensure good continuity.

[0047] The through-hole serves as a drainage channel 104, providing a direct and smooth discharge path for the electrolyte. The design, penetrating both sidewalls, allows the electrolyte in the mounting tank 102 to flow out quickly, effectively reducing the residence time of the electrolyte within the tank. This significantly reduces the likelihood of electrolyte crystallization at low temperatures, preventing crystalline substances from affecting the insulation performance of the battery cover, ensuring normal battery operation, and extending battery life.

[0048] According to one embodiment of the present invention, there are at least two through holes along the length of the cover plate assembly, and the at least two through holes are symmetrically arranged with respect to the center line of the width direction of the mounting groove 102.

[0049] or,

[0050] Along the length of the cover plate assembly, there are at least two through holes, and the at least two through holes are symmetrically arranged with respect to the center line of the length of the mounting groove 102;

[0051] or,

[0052] Along the length of the cover plate assembly, there are at least two sets of through holes, each set including at least two through holes. The at least two sets of through holes are symmetrically arranged with respect to the center line of the mounting groove 102 along its length, and the through holes in each set are symmetrically arranged with respect to the center line of the mounting groove 102 along its width.

[0053] In one embodiment of this utility model, during mold design, at least two through holes can be planned in the width direction of the mounting groove 102 according to the width of the mounting groove 102 and the drainage requirements. These through holes are symmetrically distributed with the centerline of the width direction of the mounting groove 102 as a reference.

[0054] Multiple symmetrically arranged through holes further improve the uniformity and efficiency of electrolyte drainage. Electrolyte at different locations within the mounting tank 102 can more quickly find its drainage channel, avoiding localized electrolyte accumulation caused by poor drainage. This helps maintain the cleanliness of the battery's interior, prevents electrolyte crystallization from damaging the battery, enhances the battery's reliability and stability, and ensures stable operation under various environments.

[0055] It is understood that, in this embodiment of the utility model, the through holes can be respectively provided on the two first groove sidewalls 108, or respectively provided on the two second groove sidewalls 110, or simultaneously provided on the two first groove sidewalls 108 and the two second groove sidewalls 110.

[0056] According to one embodiment of the present invention, a first mounting portion 112 is formed in the mounting groove 102, and a second mounting portion 114 is formed on the pole base plate 106. The pole base plate 106 is adapted to be mounted in the mounting groove 102 through the cooperation of the first mounting portion 112 and the second mounting portion 114.

[0057] In one embodiment of this utility model, when manufacturing the plastic part 100, a first mounting portion 112 is integrally formed in the mounting groove 102 by injection molding. The first mounting portion 112 can be a hook, a protrusion, or other structure. For example, if the first mounting portion 112 is a hook, a protruding core in the shape of a hook will be set at the corresponding position in the mold, and the plastic material will wrap around the core to form the hook during injection molding. When manufacturing the pole base plate 106, a second mounting portion 114, such as a slot or groove, that is adapted to the first mounting portion 112 is also formed on its surface using a suitable process (such as stamping, injection molding, etc.). During assembly, the second mounting portion 114 on the pole base plate 106 is aligned with the first mounting portion 112 in the mounting groove 102 of the plastic part 100, and the two are connected by pressing or other assembly methods to complete the installation of the pole base plate 106.

[0058] The cooperative installation method of the first mounting part 112 and the second mounting part 114 improves the accuracy and stability of the electrode base plate 106 installation. Compared with other simple installation methods, this cooperative installation can better limit the displacement and shaking of the electrode base plate 106 within the mounting groove 102, ensuring a tight fit between the electrode base plate 106 and the plastic part 100. This helps to reduce assembly gaps, reduce the space for electrolyte accumulation, further improve the insulation performance and safety of the battery, and also enhance the overall structural strength of the cover assembly.

[0059] According to one embodiment of the present invention, a gap is formed between the edge of the second mounting portion 114 and the sidewall of the mounting groove 102.

[0060] In one embodiment of this utility model, during the manufacturing process of the pole base plate 106, a gap can be reserved at the position corresponding to the side wall of the mounting groove 102, according to design requirements. The size of the gap is generally between 0.1 mm and 0.5 mm, and its dimensional accuracy and uniformity must be ensured during the manufacturing process.

[0061] The gap further optimizes the installation and performance of the terminal base plate 106. It also provides tolerance for assembly errors, helping to improve assembly efficiency and reduce installation difficulties caused by dimensional deviations. During battery use, the gap alleviates stress concentration between the terminal base plate 106 and the plastic part 100, preventing loosening or damage to the connection between them due to thermal expansion and contraction or external forces. This better maintains the sealing of the cover assembly, reduces the risk of electrolyte leakage and accumulation, and ensures the safety and reliability of the battery.

[0062] According to one embodiment of the present invention, the first mounting part 112 is integrally formed with the plastic part 100, and the second mounting part 114 is integrally formed with the pole base plate 106.

[0063] In one embodiment of this utility model, when manufacturing the plastic part 100, an injection molding process is used to injection mold the first mounting part 112 and the plastic part 100 as a whole. For the pole base plate 106, depending on its material and manufacturing process, if it is made of metal, a stamping die can be used to integrally mold the second mounting part 114 and the pole base plate 106; if it is made of plastic, the same injection molding process is used to design the cavity of the second mounting part 114 and the pole base plate 106 as a single unit, forming an integrated structure through injection molding.

[0064] The one-piece molding method significantly improves the connection strength between the first mounting part 112 and the plastic part 100, and between the second mounting part 114 and the terminal base plate 106. One-piece molding eliminates the problem of loosening or detachment at the connection points, enhancing the overall structural stability of the cover assembly. Simultaneously, one-piece molding reduces production steps, improves production efficiency, and lowers production costs. Furthermore, due to the elimination of assembly errors, the fitting precision of the first and second mounting parts 114 is higher, better ensuring a tight fit between the terminal base plate 106 and the plastic part 100, further improving battery performance and safety.

[0065] According to one embodiment of the present invention, the drain channel 104 is spaced apart from the edge of the plastic part 100.

[0066] In one embodiment of this utility model, the edge of the drain channel 104 facing the plastic part 100 does not directly penetrate the plastic part 100, but is kept at a certain distance.

[0067] This design prevents the structure of the mounting groove 102 from being weakened, thereby ensuring the stability of the mounting structure of the pole base plate 106 in the mounting groove 102.

[0068] A second aspect of this utility model provides a housing, including a housing body, on which the aforementioned cover plate assembly is mounted.

[0069] In the design of the second aspect embodiment of this utility model, the housing is composed of a housing body and the aforementioned cover plate assembly.

[0070] The casing body is typically made of materials with good mechanical strength and corrosion resistance, such as aluminum alloy, stainless steel, or high-strength engineering plastics. Depending on the battery specifications and application scenarios, the casing body is processed into specific shapes and sizes through processes such as stamping, injection molding, and casting, with pre-reserved mounting areas and connection structures on its surface to accommodate the cover plate assembly.

[0071] According to the second aspect of the present invention, the cover assembly is tightly connected to the housing body, forming a stable integral structure. When the battery is subjected to external impact or vibration, the cover assembly can work together with the housing body to distribute the force, effectively dispersing the external force and preventing structural damage caused by excessive local stress. This enhances the overall structural strength and stability of the battery and extends its service life. The reasonable connection method and positioning structure ensure a good seal between the cover assembly and the housing body. This effectively prevents electrolyte leakage, avoiding corrosion and pollution of the external environment caused by the electrolyte; it also prevents external air, moisture, and other impurities from entering the battery, maintaining the stability of the internal environment, protecting the electrodes and other components inside the battery, and improving the safety and reliability of the battery.

[0072] A third aspect of this utility model provides a battery, including the cover plate assembly described above;

[0073] Or the aforementioned casing.

[0074] When the battery uses the aforementioned cover assembly, the plastic component 100 of the cover assembly plays a crucial role. The mounting groove 102 on the plastic component 100 provides a precise mounting position for the terminal base plate 106. During battery assembly, the terminals are mounted on the terminal base plate 106. As key components for battery current input and output, the terminals require a stable support structure. The design of the mounting groove 102 ensures the installation accuracy of the terminal base plate 106, allowing the terminals to accurately connect to the electrodes and other components inside the battery.

[0075] When a battery uses the aforementioned casing, the casing consists of a casing body and a cover assembly. The casing body is the external protective structure of the battery, providing physical protection for internal components such as the battery cells and electrolyte. The casing body is typically made of materials with a certain strength and corrosion resistance, such as metal or high-strength plastic. During the manufacturing process, the casing body is processed into a specific shape and size according to the specific specifications and design requirements of the battery to accommodate the various internal components.

[0076] According to the battery provided in the third aspect embodiment of this utility model, the drain channel 104 effectively solves the problem of electrolyte accumulation, reducing safety hazards such as short circuits and corrosion caused by electrolyte buildup. Especially in low-temperature environments, it avoids damage to the internal structure of the battery caused by electrolyte crystallization, thereby improving the safety of the battery under different environmental conditions. The casing provides a robust outer shell for the internal components of the battery, effectively resisting external impacts, compression, and other mechanical stresses, preventing damage to the internal structure of the battery, and extending the battery's service life.

[0077] 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 cover plate assembly, characterized in that, include: A plastic part having a mounting groove formed thereon, and a drain channel penetrating the sidewall of at least one groove of the mounting groove being formed along the length direction of the cover plate assembly; The pole base plate is installed in the mounting slot.

2. The cover plate assembly according to claim 1, characterized in that, Along the length of the cover plate assembly, the mounting groove includes a first groove sidewall and a second groove sidewall disposed opposite to each other, and the drain channel is formed in the first groove sidewall and the second groove sidewall.

3. The cover plate assembly according to claim 2, characterized in that, The drainage channel includes a through hole that extends through the sidewalls of the first and second tanks along the length of the cover plate assembly.

4. The cover plate assembly according to claim 3, characterized in that, Along the width direction of the cover plate assembly, there are at least two through holes, and the at least two through holes are symmetrically arranged about the center line of the width direction of the mounting groove; or, Along the length of the cover plate assembly, there are at least two through holes, and the at least two through holes are symmetrically arranged about the center line of the length of the mounting groove. or, Along the length of the cover plate assembly, there are at least two sets of through holes, each set including at least two through holes. The at least two sets of through holes are symmetrically arranged with respect to the center line of the length direction of the mounting groove, and the through holes in each set are symmetrically arranged with respect to the center line of the width direction of the mounting groove.

5. The cover plate assembly according to any one of claims 1 to 4, characterized in that, A first mounting portion is formed in the mounting groove, and a second mounting portion is formed on the pole base plate. The pole base plate is adapted to be installed in the mounting groove by the cooperation of the first mounting portion and the second mounting portion.

6. The cover plate assembly according to claim 5, characterized in that, A gap is formed between the edge of the second mounting part and the sidewall of the mounting groove.

7. The cover plate assembly according to claim 5, characterized in that, The first mounting part is integrally formed with the plastic part, and the second mounting part is integrally formed with the pole base plate.

8. The cover plate assembly according to any one of claims 1 to 4, characterized in that, The drainage channel is spaced apart from the edge of the plastic part.

9. A housing, characterized in that, It includes a housing body on which a cover plate assembly as described in any one of claims 1 to 8 is mounted.

10. A battery, characterized in that, Includes the cover plate assembly as described in any one of claims 1 to 8; Or the housing as described in claim 9.

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