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 the 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. In the cover plate assembly, the liquid discharge flow channel on the side wall of the mounting groove can effectively discharge electrolyte accumulated in the assembling gap between the pole bottom plate and the plastic part after liquid injection of the battery; the accumulation of the electrolyte in the gap is avoided, and the risk of electrolyte crystallization in a low-temperature environment is reduced, so that the problem that the insulating property of the battery cover plate is reduced due to crystalline substances is prevented, and the safety performance of the battery is guaranteed. And the pole bottom plate is mounted in the mounting groove and is in close fit with the mounting groove, so that the stability of the pole bottom plate in the working process of the battery is ensured. And the insulating property of the plastic part effectively isolates the pole from other parts, thereby preventing the short circuit phenomenon and ensuring the stability of the electrical property 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 of the cover plate assembly, a drain channel penetrating the sidewall of the mounting groove is formed therethrough.

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

[0009] According to one embodiment of the present invention, the drain channel includes a through hole that extends through the sidewall of the groove along the length of the cover plate assembly.

[0010] According to one embodiment of the present invention, the drainage channel includes a drainage trough, which extends through the side wall of the trough along the length of the cover plate assembly.

[0011] According to one embodiment of the present invention, the edge of the drainage trough is connected to the edge of the sidewall of the trough.

[0012] 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.

[0013] 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.

[0014] 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.

[0015] According to one embodiment of the present invention, the drain channel is spaced apart from the edge of the plastic part.

[0016] A second aspect of this utility model provides a housing, including a housing body, on which the aforementioned cover plate assembly is mounted.

[0017] A third aspect of this utility model provides a battery, including the cover plate assembly described above;

[0018] Or the aforementioned casing.

[0019] According to the cover plate assembly provided in the first aspect of this utility model, the drain channel on the side wall of the mounting groove can effectively drain the electrolyte accumulated in the gap between the terminal base plate and the plastic part after battery electrolyte filling. Whether the channel is in the form of a through hole or a drain groove, it provides a drainage channel for the electrolyte, avoiding its accumulation in the gap and reducing the risk of electrolyte crystallization at low temperatures. This prevents the battery cover plate's insulation performance from deteriorating due to crystallized substances, ensuring the battery's safety performance. The terminal base plate is installed in the mounting groove, and the two fit tightly together, ensuring the stability of the terminal base plate during battery operation. The insulation performance of the plastic part effectively isolates the terminal from other components, preventing short circuits and ensuring stable battery electrical performance. Simultaneously, the drain channel solves the problem of electrolyte accumulation, further improving battery reliability and extending battery life.

[0020] 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.

[0021] 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

[0022] 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.

[0023] Figure 1 This is a schematic front view of the cover plate assembly provided by this utility model.

[0024] Figure 2 This is a schematic perspective view of the cover plate assembly provided by this utility model.

[0025] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0026] Figure label:

[0027] 100. Plastic part; 102. Mounting groove; 104. Groove sidewall; 106. Drainage channel; 108. Base plate of pole; 110. First mounting part; 112. Second mounting part. Detailed Implementation

[0028] 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.

[0029] like Figures 1 to 3 As shown, a first aspect embodiment of the present invention provides a cover plate assembly, comprising:

[0030] The plastic part 100 has an installation groove 102 formed on it. Along the length direction of the cover plate assembly, the side wall 104 of the installation groove 102 has a drainage channel 106 that penetrates the side wall 104.

[0031] The pole base plate 108 is installed in the mounting groove 102.

[0032] According to the cover assembly provided in the first aspect of this utility model, the drain channel 106 of the side wall 104 of the mounting groove 102 can effectively drain the electrolyte accumulated in the assembly gap between the terminal base plate 108 and the plastic part 100 after battery electrolyte filling. Whether the channel is in the form of a through hole or a drain groove, it provides a drainage channel for the electrolyte, avoiding its accumulation in the gap and reducing the risk of electrolyte crystallization at low temperatures. This prevents the battery cover's insulation performance from deteriorating due to crystallized substances, ensuring the battery's safety performance. The terminal base plate 108 is installed in the mounting groove 102, and the two fit tightly together, ensuring the stability of the terminal base plate 108 during battery operation. The insulation performance of the plastic part 100 effectively isolates the terminal from other components, preventing short circuits and ensuring stable battery electrical performance. Simultaneously, the drain channel 106 solves the problem of electrolyte accumulation, further improving battery reliability and extending battery life.

[0033] Please continue reading Figures 1 to 3 In the cover plate assembly design of the first aspect embodiment of this utility model, the plastic part 100 and the pole base plate 108 are the core components, and the two cooperate with each other to form the main structure of the cover plate assembly.

[0034] The plastic part 100 is typically made of engineering plastic with good insulation properties and manufactured through injection molding. During manufacturing, a specific-shaped mounting groove 102 and a drainage channel 106 are constructed in the mold according to design requirements. The dimensions, shape, and depth of the mounting groove 102 are precisely designed based on the outline of the pole base plate 108 to ensure a tight fit and installation within it. The drainage channel 106 extends through the thickness direction of the sidewall 104 of the mounting groove 102, and its processing method depends on the specific form of the channel. If it is a through-hole type, a corresponding core structure is provided on the mold; during injection molding, the plastic material flows around the core, forming a through-hole after cooling. If it is a drainage groove type, the drainage groove is shaped by a specific shape of the mold cavity. During manufacturing, extremely high precision is required for the mold to ensure the dimensional and positional accuracy of the mounting groove 102 and the drainage channel 106.

[0035] The electrode base plate 108 is generally made of metal, possessing good conductivity and a certain degree of mechanical strength. After the electrode base plate 108 is manufactured, it is installed into the mounting groove 102 of the plastic part 100. During installation, the electrode base plate 108 is aligned with the mounting groove 102 manually or using automated equipment to ensure precise fit. Because there is a certain tolerance range between the mounting groove 102 and the electrode base plate 108, the position needs to be adjusted appropriately during installation to ensure that the electrode base plate 108 is stably embedded in the mounting groove 102, achieving a tight installation.

[0036] According to one embodiment of the present invention, the drain channel 106 includes a through hole that extends through the side wall 104 of the groove along the length of the cover plate assembly.

[0037] In one embodiment of this utility model, when manufacturing the plastic part 100, mold processing technology can be used to open through holes as drainage channels 106 on the side wall 104 of the mounting groove 102. The diameter of the through hole can be determined according to actual needs, generally between 0.5 mm and 2 mm, to ensure that the electrolyte can be effectively drained without affecting the structural strength of the plastic part 100. During the manufacturing process, high-precision mold processing equipment and strict process control are used to ensure the dimensional and positional accuracy of the through holes, so that the through holes on each plastic part 100 have good consistency.

[0038] This through-hole drainage channel 106 design allows for the direct and effective drainage of electrolyte accumulated in the mounting tank 102. After battery filling, if electrolyte accumulates in the assembly gap between the mounting tank 102 and the terminal base plate 108, it can flow out through the through-hole, preventing electrolyte buildup. This effectively reduces the risk of electrolyte crystallization at low temperatures, thereby mitigating the problem of decreased battery cover insulation performance due to crystallization, ensuring battery safety and stability, and extending battery life.

[0039] According to one embodiment of the present invention, the drain channel 106 includes a drain trough, which extends through the side wall 104 of the trough along the length of the cover plate assembly.

[0040] In one embodiment of this utility model, the shape of the drainage trough can be rectangular, trapezoidal, etc., and the depth and width can be designed according to actual needs. Generally, the depth is between 1 mm and 3 mm, and the width is between 2 mm and 5 mm.

[0041] Compared to through holes, the drain trough has a larger drainage area, enabling faster electrolyte drainage. Its design, penetrating the side wall 104, allows electrolyte at different locations within the mounting tank 102 to flow out through the drain trough. This further improves drainage efficiency, more effectively prevents electrolyte accumulation within the mounting tank 102, reduces battery malfunctions caused by electrolyte buildup, and enhances the overall performance and reliability of the battery.

[0042] According to one embodiment of the present invention, the edge of the draining trough is connected to the edge of the side wall 104 of the trough.

[0043] In one embodiment of this utility model, the mold cavity of the edge of the drain groove and the edge of the sidewall 104 of the groove is designed as a continuous and unobstructed structure to ensure that the edge of the drain groove and the edge of the sidewall 104 of the groove are completely connected after injection molding.

[0044] The edge of the drain trough is continuous with the edge of the side wall 104, eliminating obstruction during the draining process and allowing the electrolyte to drain more smoothly from the mounting tank 102. This further improves draining efficiency and reduces the possibility of electrolyte accumulation at the edges. Simultaneously, this design also helps prevent electrolyte residue caused by poor draining, thereby better protecting the battery's insulation performance and improving its safety and stability.

[0045] According to one embodiment of the present invention, a first mounting portion 110 is formed in the mounting groove 102, and a second mounting portion 112 is formed on the pole base plate 108. The pole base plate 108 is adapted to be mounted in the mounting groove 102 by the cooperation of the first mounting portion 110 and the second mounting portion 112.

[0046] In one embodiment of this utility model, when manufacturing the plastic part 100, a first mounting portion 110 is integrally formed in the mounting groove 102 by injection molding. The first mounting portion 110 can be a hook, a protrusion, or other structure. For example, if the first mounting portion 110 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 108, a second mounting portion 112, such as a slot or groove, that is adapted to the first mounting portion 110 is also formed on its surface using a suitable process (such as stamping, injection molding, etc.). During assembly, the second mounting portion 112 on the pole base plate 108 is aligned with the first mounting portion 110 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 108.

[0047] The cooperative installation method of the first mounting part 110 and the second mounting part 112 improves the accuracy and stability of the electrode base plate 108 installation. Compared with other simple installation methods, this cooperative installation can better limit the displacement and shaking of the electrode base plate 108 within the mounting groove 102, ensuring a tight fit between the electrode base plate 108 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.

[0048] According to one embodiment of the present invention, a gap is formed between the edge of the second mounting portion 112 and the groove sidewall 104 of the mounting groove 102.

[0049] In one embodiment of this utility model, during the manufacturing process of the pole base plate 108, a gap can be reserved at the position corresponding to the second mounting part 112 and the side wall 104 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.

[0050] The gap further optimizes the installation and performance of the terminal base plate 108. 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 108 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.

[0051] According to one embodiment of the present invention, the first mounting part 110 is integrally formed with the plastic part 100, and the second mounting part 112 is integrally formed with the pole base plate 108.

[0052] 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 110 and the plastic part 100 as a whole. For the pole base plate 108, 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 112 and the pole base plate 108; if it is made of plastic, the same injection molding process is used to design the cavity of the second mounting part 112 and the pole base plate 108 as a single unit, forming an integrated structure through injection molding.

[0053] The one-piece molding method significantly improves the connection strength between the first mounting part 110 and the plastic part 100, and between the second mounting part 112 and the terminal base plate 108. 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 112 is higher, better ensuring a tight fit between the terminal base plate 108 and the plastic part 100, further improving battery performance and safety.

[0054] According to one embodiment of the present invention, the drain channel 106 is spaced apart from the edge of the plastic part 100.

[0055] In one embodiment of this utility model, the edge of the drain channel 106 facing the plastic part 100 does not directly penetrate the plastic part 100, but is kept at a certain distance.

[0056] 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 108 in the mounting groove 102.

[0057] A second aspect of this utility model provides a housing, including a housing body, on which the aforementioned cover plate assembly is mounted.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] A third aspect of this utility model provides a battery, including the cover plate assembly described above;

[0062] Or the aforementioned casing.

[0063] 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 108. During battery assembly, the terminals are mounted on the terminal base plate 108. 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 108, allowing the terminals to accurately connect with internal battery components such as electrodes.

[0064] 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.

[0065] According to the battery provided in the third aspect embodiment of this utility model, the drain channel 106 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.

[0066] 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 along the length of the cover plate assembly, a drain channel penetrating the sidewall of the mounting groove is formed therethrough. The pole base plate is installed in the mounting slot.

2. The cover plate assembly according to claim 1, characterized in that, The drainage channel includes a through hole that extends through the sidewall of the tank along the length of the cover plate assembly.

3. The cover plate assembly according to claim 1, characterized in that, The drainage channel includes a drainage trough, which extends through the sidewall of the trough along the length of the cover plate assembly.

4. The cover plate assembly according to claim 3, characterized in that, The edge of the drainage trough is connected to the edge of the sidewall of the trough.

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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