Cover plate assembly, housing and battery

Abstract

This utility model relates to the field of batteries, providing a cover plate assembly, a housing, and a battery. The cover plate assembly includes a plastic part with a mounting groove formed thereon. A first mounting portion is formed in the mounting groove along its width direction, and a first gap is formed between the edge of the first mounting portion and the sidewall of the mounting groove. A terminal base plate has a second mounting portion formed thereon, and the terminal base plate is adapted to be installed in the mounting groove through the cooperation of the first and second mounting portions. This cover plate assembly allows the terminal base plate to be accurately installed in the mounting groove of the plastic part, improving assembly accuracy. The presence of the first gap provides a certain margin of error during the assembly process, ensuring smooth installation of the terminal base plate even with dimensional deviations during manufacturing. The first gap allows both components to expand and contract freely within a certain range, avoiding structural deformation or damage caused by thermal expansion and contraction, ensuring the structural stability of the cover plate assembly, and reducing the risk of electrolyte accumulation.

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.

[0003] Currently, solutions to this problem mainly focus on improving manufacturing processes and material selection, such as reducing assembly gaps and electrolyte accumulation through precision injection molding and improved material compatibility. However, while these methods can alleviate the problem to some extent, they cannot completely eliminate electrolyte accumulation in the gaps, especially in harsh low-temperature environments, where the results are often unsatisfactory. Utility Model Content

[0004] This utility model provides a cover plate assembly to solve the defect of electrolyte accumulation in related technologies.

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

[0006] This utility model embodiment also provides a battery.

[0007] A first aspect of this utility model provides a cover plate assembly, comprising:

[0008] A plastic part having a mounting groove formed therein, a first mounting portion being formed in the mounting groove, and a first gap being formed between the edge of the first mounting portion and the sidewall of the mounting groove along the width direction of the mounting groove.

[0009] The pole base plate has a second mounting portion formed thereon, and 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.

[0010] According to one embodiment of the present invention, a pair of first mounting portions are formed in the mounting groove along the length direction of the mounting groove, and the second mounting portion on the pole base plate corresponds one-to-one with the first mounting portion.

[0011] According to one embodiment of the present invention, the first mounting part includes one of a hook and a block, and the second mounting part includes the other of the hook and the block.

[0012] According to one embodiment of the present invention, the edge of the hook is chamfered.

[0013] According to one embodiment of the present invention, along the length direction of the first mounting portion, the first gap is formed between the two sidewalls of the first mounting portion and the two grooves opposite to the mounting groove at both ends of the first mounting portion.

[0014] According to one embodiment of the present invention, the first gap between the two ends of the first mounting portion and the two sidewalls of the mounting groove opposite to the mounting groove is equal.

[0015] According to one embodiment of the present invention, along the length direction of the second mounting portion, the second gap is formed between the two sidewalls of the two grooves opposite to the mounting groove at both ends of the second mounting portion.

[0016] According to one embodiment of the present invention, the second gap between the two ends of the second mounting portion and the two sidewalls of the mounting groove opposite to the mounting groove is equal.

[0017] A second aspect of this utility model provides a housing, including a housing body, on which the aforementioned cover plate assembly is mounted.

[0018] A third aspect of this utility model provides a battery, including the cover plate assembly described above;

[0019] Or the aforementioned casing.

[0020] According to the cover plate assembly provided in the first aspect embodiment of this utility model, the cooperative design of the first mounting part and the second mounting part enables the electrode base plate to be accurately installed in the mounting groove of the plastic part, improving assembly accuracy. Simultaneously, the existence of the first gap provides a certain margin of error during the assembly process. Even if there are certain dimensional deviations during manufacturing, the electrode base plate can still be installed smoothly, reducing adjustment and correction time during assembly and improving assembly efficiency. The plastic and the electrode base plate may undergo some thermal expansion and contraction. The first gap allows both to expand and contract freely within a certain range, avoiding structural deformation or damage caused by thermal expansion and contraction, thereby ensuring the structural stability of the cover plate assembly, reducing the risk of electrolyte accumulation due to structural changes, and extending the battery's lifespan.

[0021] According to the second aspect of the present invention, the tight connection between the cover assembly and the housing body enhances the structural strength and stability of the entire housing. The cover assembly effectively disperses external forces and vibrations experienced by the battery during use, preventing damage to the housing due to excessive localized stress, thereby improving the overall reliability and lifespan of the battery. Through a reasonable connection method and positioning structure, a good seal is formed between the cover assembly and the housing body. This prevents electrolyte leakage and the entry of external air, moisture, and other impurities into the battery, protecting the electrodes and other components inside the battery and improving the battery's safety and stability.

[0022] According to the battery provided in the third aspect embodiment of this utility model, the insulation performance of the plastic parts in the cover assembly and the stable structure formed by the tight cooperation of the first and second mounting parts effectively prevent internal short circuits in the battery, ensuring the safety of the battery during use. The casing body provides a robust physical barrier for the internal components of the battery, effectively resisting mechanical stresses such as external impacts and compressions, reducing damage to the internal structure of the battery caused by external forces, and extending the battery's service life. Attached Figure Description

[0023] 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.

[0024] Figure 1 This is a schematic front view of the cover plate assembly provided by this utility model.

[0025] Figure 2 yes Figure 1 A schematic cross-sectional view along the AA direction.

[0026] Figure 3 yes Figure 2 A magnified view of a section at point B.

[0027] Figure 4 This is a schematic perspective view of the cover plate assembly provided by this utility model.

[0028] Figure 5 yes Figure 4 A magnified view of a section at point C.

[0029] Figure label:

[0030] 100. Plastic part; 102. Mounting groove; 104. First mounting part; 106. First gap; 108. Base plate of pole post; 110. Second mounting part; 112. Chamfer; 114. Second gap. Detailed Implementation

[0031] 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.

[0032] like Figures 1 to 5 As shown, a first aspect embodiment of the present invention provides a cover plate assembly, comprising:

[0033] A plastic part 100 has a mounting groove 102 formed on it. A first mounting portion 104 is formed in the mounting groove 102. A first gap 106 is formed between the edge of the first mounting portion 104 and the side wall of the mounting groove 102 along the width direction of the mounting groove 102.

[0034] The pole base plate 108 has a second mounting portion 110 formed on it. The pole base plate 108 is adapted to be installed in the mounting groove 102 through the cooperation of the first mounting portion 104 and the second mounting portion 110.

[0035] According to the cover assembly provided in the first aspect embodiment of this utility model, the cooperative design of the first mounting part 104 and the second mounting part 110 allows the electrode base plate 108 to be accurately installed in the mounting groove 102 of the plastic part 100, improving assembly accuracy. Simultaneously, the presence of the first gap 106 provides a certain margin of error during the assembly process. Even if there are certain dimensional deviations during manufacturing, the electrode base plate 108 can be installed smoothly, reducing adjustment and correction time during assembly and improving assembly efficiency. The plastic and the electrode base plate 108 may experience some thermal expansion and contraction. The first gap 106 allows both to expand and contract freely within a certain range, avoiding structural deformation or damage caused by thermal expansion and contraction, thereby ensuring the structural stability of the cover assembly, reducing the risk of electrolyte accumulation due to structural changes, and extending the battery's lifespan.

[0036] Please continue reading Figures 1 to 5 In the cover plate assembly of this utility model, the plastic part 100 is typically made of a plastic material with good insulation properties and a certain mechanical strength, and is manufactured through injection molding. During the manufacturing process, an installation groove 102 is machined on its surface. The size, shape, and depth of the installation groove 102 can be designed according to the external dimensions and installation requirements of the pole base plate 108 to ensure that the pole base plate 108 can be installed tightly and accurately within it.

[0037] A first mounting portion 104 is also formed in the mounting groove 102. The first mounting portion 104 can take various forms such as a protrusion, a groove, or a snap-fit, and its specific shape and structure depend on the way it mates with the second mounting portion 110. Simultaneously, a first gap 106 is formed between the edge of the first mounting portion 104 and the side wall of the mounting groove 102. By setting the first gap 106, if electrolyte is present between the plastic part 100 and the electrode base plate 108, the electrolyte can be smoothly drained, preventing electrolyte accumulation.

[0038] The electrode base plate 108 is generally made of metal materials, such as stainless steel or aluminum alloy, to ensure good conductivity and mechanical strength. A second mounting portion 110 is formed on the electrode base plate 108. The structure of the second mounting portion 110 is adapted to the first mounting portion 104. For example, if the first mounting portion 104 is a protrusion, the second mounting portion 110 may be a corresponding groove; if the first mounting portion 104 is a snap-fit, the second mounting portion 110 is a slot that can cooperate with it. The electrode base plate 108 is mounted in the mounting groove 102 through the cooperation of the first mounting portion 104 and the second mounting portion 110.

[0039] During installation, the operator needs to accurately align the pole base plate 108 with the mounting groove 102 and apply appropriate pressure to ensure that the first mounting part 104 and the second mounting part 110 cooperate to complete the installation. During installation, the presence of the first gap 106 provides a certain margin of error for the installation of the pole base plate 108, allowing the pole base plate 108 to be finely adjusted within a certain range to ensure smooth installation.

[0040] According to one embodiment of the present invention, a pair of first mounting portions 104 are formed in the mounting groove 102 along the length direction of the mounting groove 102, and a second mounting portion 110 on the pole base plate 108 corresponds one-to-one with the first mounting portions 104.

[0041] In one embodiment of this utility model, the mounting groove 102 of the plastic part 100 is designed and laid out along its length. A pair of opposing first mounting portions 104 are constructed in the mounting groove 102. The shape and size of the pair of first mounting portions 104 are exactly the same, and they are symmetrically distributed about the central axis of the mounting groove 102.

[0042] The manufacturing of the pole base plate 108 can also rely on mold technology. Based on the position, shape, and size of the first mounting part 104 on the plastic part 100, a corresponding second mounting part 110 is designed and manufactured on the pole base plate 108. These second mounting parts 110 correspond one-to-one with the first mounting parts 104, meaning that in terms of position, each second mounting part 110 on the pole base plate 108 can be accurately aligned with a first mounting part 104 in the mounting groove 102; in terms of shape and size, the two are closely matched. For example, if the first mounting part 104 is a hook, the second mounting part 110 is a matching block, or vice versa.

[0043] From an assembly perspective, the pair of opposing first mounting portions 104 and the corresponding second mounting portions 110 provide accurate positioning marks for the installation of the terminal base plate 108. During assembly, operators can quickly and easily align the terminal base plate 108 with the plastic part 100, greatly improving assembly efficiency and reducing assembly errors. Simultaneously, the one-to-one correspondence of the first mounting portions 104 and the second mounting portions 110 ensures more even force distribution on the terminal base plate 108 within the mounting groove 102. During battery use, regardless of vibration, impact, or other external forces, the terminal base plate 108 remains stably fixed to the plastic part 100, preventing tilting or displacement due to uneven force distribution, thus enhancing the overall structural stability of the cover assembly. Furthermore, precise alignment reduces the gap between the terminal base plate 108 and the plastic part 100, effectively reducing the risk of electrolyte accumulation at the interface, thereby improving battery safety and reliability and extending battery life.

[0044] According to one embodiment of the present invention, the first mounting part 104 includes one of a hook and a block, and the second mounting part 110 includes the other of a hook and a block.

[0045] In one embodiment of this utility model, during the actual manufacturing of the cover plate assembly, a combination of hooks and blocks is specifically selected for the first mounting portion 104 in the mounting groove 102 of the plastic part 100 and the second mounting portion 110 on the pole base plate 108. If the first mounting portion 104 is designed as a hook, then the second mounting portion 110 is a matching block; and vice versa.

[0046] Taking the first mounting part 104 as an example, the hook is usually integrally molded with the mounting groove 102 of the plastic part 100 through injection molding. Its shape is a flexible structure with a certain bending angle, which facilitates its cooperation with the locking block. The locking block is formed simultaneously during the manufacturing of the pole base plate 108, and its shape matches the bent part of the hook. When assembling the cover plate assembly, the locking block on the pole base plate 108 is aligned with the hook in the mounting groove 102 of the plastic part 100. By appropriate pressing or other assembly methods, the elastic arm of the hook is deformed, so that the locking block can be smoothly embedded into the hook, achieving a tight connection between the two.

[0047] This combination of hooks and blocks provides a more secure connection. The interlocking hooks and blocks prevent the terminal base plate 108 from shifting or shaking within the mounting groove 102, effectively enhancing the structural stability of the cover assembly. During battery use, even under certain external forces such as vibration and impact, the connection between the terminal base plate 108 and the plastic part 100 remains stable, thus avoiding the problem of electrolyte accumulation due to loose connection and improving battery safety and reliability.

[0048] According to one embodiment of the present invention, the edge of the hook is chamfered 112.

[0049] In one embodiment of this utility model, during the mold design stage, the edge of the hook is designed as a chamfered structure 112 with a certain angle. The angle of the chamfer 112 can be between 30 degrees and 60 degrees, and the specific angle can be determined according to the size, material and actual assembly requirements of the hook.

[0050] For example, for smaller hooks made of softer materials, the chamfer angle 112 can be appropriately reduced to ensure the hook's strength; for larger hooks made of harder materials, the chamfer angle 112 can be appropriately increased to facilitate assembly. During the manufacturing process, high-precision mold processing technology ensures the dimensional accuracy and surface quality of the chamfer 112, avoiding problems such as burrs and defects.

[0051] According to one embodiment of the present invention, along the length direction of the first mounting portion 104, a first gap 106 is formed between the two sidewalls of the mounting groove 102 at both ends of the first mounting portion 104.

[0052] In one embodiment of this utility model, when designing the mounting groove 102 and the first mounting portion 104 of the plastic part 100, the position of the first mounting portion 104 within the mounting groove 102 is set such that a certain gap, namely the first gap 106, is reserved between the two ends of the first mounting portion 104 and the two opposite sidewalls of the mounting groove 102. The size of the first gap 106 can be determined according to the material characteristics of the plastic part 100 and the electrode base plate 108, the manufacturing process precision, and the actual usage environment of the battery. For example, the first gap 106 can be between 0.1 mm and 0.5 mm.

[0053] By setting the first gap 106, on the one hand, the first gap 106 provides a certain margin of error for the assembly process. Even if there are certain dimensional deviations during manufacturing, it can ensure that the terminal base plate 108 can be smoothly installed into the mounting groove 102, thus improving the assembly success rate of the product. On the other hand, during battery use, due to factors such as temperature changes, the plastic part 100 and the terminal base plate 108 may undergo certain thermal expansion and contraction. The first gap 106 allows both to expand and contract freely within a certain range, avoiding structural deformation or damage caused by thermal expansion and contraction, thereby ensuring the structural stability of the cover assembly, reducing the risk of electrolyte accumulation due to structural changes, and extending the battery's service life.

[0054] According to one embodiment of the present invention, the first gap 106 between the two ends of the first mounting portion 104 and the two sidewalls of the mounting groove 102 opposite to the two grooves is equal.

[0055] In one embodiment of this invention, the equal first gap 106 allows for more uniform force distribution on the electrode base plate 108 within the mounting groove 102. When the electrode base plate 108 is installed into the mounting groove 102, the force from the groove sidewall is evenly distributed due to the equal gaps at both ends, preventing tilting or offset of the electrode base plate 108 caused by uneven force distribution. This helps to further improve the assembly accuracy between the electrode base plate 108 and the plastic part 100, reducing gap differences between them, thereby more effectively preventing electrolyte accumulation in the gaps, improving the battery's insulation performance and safety, and ensuring the stability and reliability of the battery during use.

[0056] According to one embodiment of the present invention, along the length direction of the second mounting portion 110, a second gap 114 is formed between the two sidewalls of the mounting groove 102 at both ends of the second mounting portion 110.

[0057] In one embodiment of this utility model, the size of the second gap 114 can be determined according to the overall dimensions of the pole base plate 108, the specifications of the mounting groove 102, and the assembly requirements, and is usually between 0.1 mm and 0.5 mm.

[0058] The existence of the second gap 114, similar to the first gap 106, facilitates the installation of the terminal base plate 108. The second gap 114 compensates for dimensional deviations during manufacturing, making it easier to install the terminal base plate 108 into the mounting groove 102 and improving assembly efficiency. Simultaneously, in actual battery use, the second gap 114 can alleviate stress concentration issues between the terminal base plate 108 and the plastic part 100 caused by factors such as temperature changes. When thermal expansion and contraction occur, the terminal base plate 108 can freely expand and contract within the range of the second gap 114, reducing the risk of structural damage due to deformation, thereby preventing electrolyte leakage and accumulation, and enhancing battery reliability and lifespan.

[0059] According to one embodiment of the present invention, the second gap 114 between the two ends of the second mounting portion 110 and the two sidewalls of the mounting groove 102 opposite to the two grooves is equal.

[0060] In one embodiment of this invention, the equal second gap 114 enables more stable and precise installation of the electrode base plate 108 within the mounting groove 102. Because the second gap 114 is equal, the electrode base plate 108 will not shift or tilt during installation due to differences in gaps on both sides, ensuring a tight fit between the electrode base plate 108 and the plastic part 100, further reducing the possibility of electrolyte accumulation. Simultaneously, the uniform gap distribution helps improve the uniformity of force distribution on the electrode base plate 108 within the mounting groove 102, enhancing the overall structural strength of the cover assembly, enabling the battery to operate stably under various operating conditions, and improving the battery's safety and reliability.

[0061] A second aspect of this utility model provides a housing, including a housing body, on which the aforementioned cover plate assembly is mounted.

[0062] In the housing according to the second aspect embodiment of this utility model, the housing body serves as the basic structure of the entire housing. When the cover plate assembly is installed on the housing body, various connection methods can be used to ensure a stable connection between the two.

[0063] According to the second aspect of the present invention, the tight connection between the cover assembly and the housing body enhances the structural strength and stability of the entire housing. The cover assembly effectively disperses external forces and vibrations experienced by the battery during use, preventing damage to the housing due to excessive localized stress, thereby improving the overall reliability and lifespan of the battery. Through a reasonable connection method and positioning structure, a good seal is formed between the cover assembly and the housing body. This prevents electrolyte leakage and the entry of external air, moisture, and other impurities into the battery, protecting the electrodes and other components inside the battery and improving the battery's safety and stability.

[0064] A third aspect of this utility model provides a battery, including the cover plate assembly described above;

[0065] Or the aforementioned casing.

[0066] When the battery includes the aforementioned cover assembly, the mounting groove 102 of the plastic part 100 and the terminal base plate 108 are fitted together via the first mounting part 104 and the second mounting part 110. The terminal base plate 108 is used to fix and support the battery terminals, ensuring stable installation of the terminals. The plastic part 100 serves two purposes: firstly, it provides insulation to prevent short circuits between the terminals and other parts of the battery; secondly, its mating structure with the terminal base plate 108 helps optimize the internal layout of the battery.

[0067] When the battery includes the aforementioned casing, the casing consists of a casing body and a cover assembly. The casing body serves as the external protective structure of the battery, providing physical protection for the internal components and preventing damage to the battery's interior from external impacts. During the manufacturing process, the casing body is formed using processes such as stamping and injection molding, according to the battery's size and shape requirements.

[0068] According to the battery provided in the third aspect embodiment of this utility model, the insulation performance of the plastic part 100 and the stable structure formed by the tight cooperation of the first and second mounting parts 110 in the cover assembly effectively prevent the occurrence of internal short circuits in the battery, ensuring the safety of the battery during use. The casing body provides a robust physical barrier for the internal components of the battery, effectively resisting mechanical stresses such as external impacts and compressions, reducing damage to the internal structure of the battery caused by external forces, and extending the battery's service life.

[0069] 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 therein, a first mounting portion being formed in the mounting groove, and a first gap being formed between the edge of the first mounting portion and the sidewall of the mounting groove along the width direction of the mounting groove. The pole base plate has a second mounting portion formed thereon, and 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.

2. The cover plate assembly according to claim 1, characterized in that, Along the length of the mounting groove, a pair of first mounting portions are formed in the mounting groove and are arranged opposite to each other. The second mounting portion on the pole base plate corresponds to the first mounting portion.

3. The cover plate assembly according to claim 1, characterized in that, The first mounting part includes one of a hook and a block, and the second mounting part includes the other of the hook and the block.

4. The cover plate assembly according to claim 3, characterized in that, The edges of the hook are chamfered.

5. The cover plate assembly according to claim 1, characterized in that, Along the length of the first mounting portion, the first gap is formed between the two sidewalls of the mounting groove opposite to the two ends of the first mounting portion.

6. The cover plate assembly according to claim 5, characterized in that, The first gaps between the two ends of the first mounting part and the two sidewalls of the mounting groove opposite to the mounting groove are equal.

7. The cover plate assembly according to claim 1, characterized in that, Along the length of the second mounting portion, a second gap is formed between the two sidewalls of the mounting groove at both ends of the second mounting portion and the two grooves opposite to the mounting groove.

8. The cover plate assembly according to claim 7, characterized in that, The second gap between the two ends of the second mounting part and the two sidewalls of the groove opposite to the mounting groove is equal.

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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