Battery top cover assembly and battery

Abstract

The utility model provides a battery top cover assembly and a battery, the battery top cover assembly comprises a substrate and a lower plastic part, a guide block is arranged along one side of the thickness direction of the substrate and at the corner of the substrate, the lower plastic part is arranged on one side of the thickness direction of the substrate, the guide block extends towards one side of the lower plastic part and is arranged on the peripheral side of the lower plastic part, and the guide block extends towards the other side of the lower plastic part. According to the battery top cover assembly, the guide block is arranged on the base plate, the guide block has a guide installation function, and the structural arrangement of the guide block can be used for achieving the technical effect of guide correction installation when the battery top cover assembly deviates; and therefore, accurate and stable installation of the battery top cover assembly and the battery shell is realized, and the press-fitting precision and success rate in the battery assembling process are improved. According to the battery top cover assembly and the battery provided by the utility model, the problem that a split type battery top cover assembly in the prior art is low in collision resistance can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technical field, specifically, relate to a battery top cover assembly and battery. BACKGROUND

[0002] In the assembly process of the battery, the precise alignment of the top cover and the shell is crucial. In the prior art, the top cover is usually fixed on the shell by mechanical press-fitting, which highly depends on the precision of the equipment and the accuracy of the operation. However, in actual production, due to the limitations of mechanical processes and minor errors in the operation process, the top cover may deviate when being pressed into the shell. This deviation is usually small, but it can significantly affect the quality of the final product in high-precision battery assembly.

[0003] When the top cover deviates, the press-fitting process may cause uneven stress on one side of the shell, causing the shell to deform, especially the edges or weak areas of the shell may be twisted or damaged due to excessive pressure. This deformation not only affects the appearance of the battery, but more critically, it may cause poor sealing of the shell to the electrode assembly inside the shell, internal short circuit, and other problems, and in severe cases, it may even cause safety hazards of the battery. Therefore, the poor press-fitting problem caused by the deviation of the top cover not only increases the scrap rate of the product, but also directly relates to the performance and safety of the product, causing waste of materials and rising production costs, which is a technical problem that needs to be solved in the field of battery manufacturing.

[0004] As can be seen from the above, the existing technology has the problem of deviation during the process of the top cover entering the shell, which affects the precision and success rate of press-fitting. SUMMARY

[0005] The main purpose of the utility model is to provide a battery top cover assembly and a battery to solve the problem of deviation during the process of the top cover entering the shell in the prior art, which affects the precision and success rate of press-fitting.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a battery top cover assembly is provided, which includes a substrate and a lower plastic part. On one side of the substrate in the thickness direction, a guide block is provided at the corner of the substrate. The lower plastic part is provided on one side of the substrate in the thickness direction. The guide block extends towards the side of the lower plastic part and is provided on the outer circumferential side of the lower plastic part. A gap for accommodating an insulating film is formed between the guide block and the outer wall surface of the lower plastic part.

[0007] Further, the size H of the gap satisfies 1mm≤H≤5mm.

[0008] Further, the lower plastic part has mounting plates at both ends in the length direction of the substrate. The mounting plates have arc-shaped relief chamfers at both ends in the width direction of the substrate. A gap is formed between the outer side surface of the relief chamfer and the inner side surface of the guide block.

[0009] Further, along the thickness direction of the substrate, the bottom surface of the mounting plate is flush with the bottom surface of the guide block.

[0010] Further, the guide block is made of insulating material.

[0011] Further, along the thickness direction of the substrate, the outer side surface of one end of the guide block connected with the substrate is coplanar with the inner side surface of the battery shell, and the outer side surface of the other end of the guide block extends towards the center side of the substrate to form a guide surface.

[0012] Further, the guide block has a first part and a second part connected in the thickness direction of the substrate, the first part is connected with the substrate, the outer side surface of the first part is coplanar with the inner side surface of the battery shell, and the outer side surface of the second part is the guide surface, one end of the outer side surface of the second part is connected with the outer side surface of the first part, and the other end of the outer side surface of the second part extends towards the center side of the substrate.

[0013] Further, one of the substrate and the lower plastic part is provided with a positioning hole, and the other is provided with a positioning column, and the positioning column and the positioning hole are inserted and matched.

[0014] Further, along the length direction of the substrate, the positioning column is provided with a plurality of groups, and each group of positioning columns includes at least two positioning columns symmetrically arranged along the width direction of the substrate.

[0015] According to another aspect of the utility model, a kind of battery is provided, battery includes battery shell, electrode assembly, insulating film and above-mentioned battery top cover assembly, electrode assembly is arranged in the inside of battery shell, insulating film is arranged between the outer surface of electrode assembly and the inner surface of battery shell, battery top cover assembly is arranged in the top opening side of battery shell, part of insulating film is inserted into the inside of gap, along the circumferential direction of lower plastic part, insulating film is hot melt connected on lower plastic part.

[0016] The technical scheme of the utility model has the following technical effects:

[0017] The battery top cover assembly of the application sets guide blocks on the substrate, which have a guiding installation function. During the assembly of the battery top cover assembly and the battery shell, the structure of the guide block can be used to realize the technical effect of guiding and correcting installation when the battery top cover assembly deviates, thereby realizing the accurate and stable installation of the battery top cover assembly and the battery shell, and improving the pressing precision and success rate during the battery assembly process.

[0018] The guide blocks of the application are arranged at four corner regions of the substrate, and gaps for accommodating the insulating film are formed between the corner regions and the lower plastic part. The arrangement of the guide blocks is conducive to realizing omnidirectional guiding installation, improving the stability of the press-fit installation, and improving the installation efficiency of the battery top cover assembly. Meanwhile, the arrangement of the installation gaps is conducive to avoiding the problem of interference between the battery top cover assembly and the insulating film during the assembly of the battery. In addition, the arrangement of the gaps has the effect of limiting the insulating film, further improving the installation efficiency of the battery top cover assembly and the stability of the product structure. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings accompanying the specification of the application form a part of the application and serve to further provide a further understanding of the application. The schematic embodiments of the application and the description thereof serve to explain the application and do not constitute an improper limitation of the application. In the drawings:

[0020] Figure 1 A perspective structural schematic view of the battery top cover assembly provided by the application is provided.

[0021] Figure 2 A bottom view of the battery top cover assembly provided by the application is provided.

[0022] Figure 3 An enlarged view of A of Figure 2

[0023] Figure 4 An exploded view of one perspective of the battery top cover assembly provided by the application is provided.

[0024] Figure 5 An exploded view of another perspective of the battery top cover assembly provided by the application is provided.

[0025] Figure 6 A perspective structural schematic view of the substrate provided by the application is provided.

[0026] Figure 7 A structural schematic view of the battery provided by the application is provided, wherein the battery shell is not shown.

[0027] In the above drawings, the following reference signs are included:

[0028] 10, substrate; 110, guide block; 111, first part; 1111, first arc surface segment; 112, second part; 1121, second arc surface segment; 20, lower plastic part; 210, mounting plate; 211, avoiding chamfer; 30, gap; 40, positioning column; 50, positioning hole; 60, insulating film. DETAILED DESCRIPTION

[0029] ​It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0030] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0031] In the present application, unless otherwise stated, the orientation words such as "upper, lower, top, bottom" are generally directed to the direction shown in the drawings, or directed to the vertical, perpendicular or gravity direction of the components themselves; similarly, for the convenience of understanding and description, "inner, outer" refers to the inner and outer of the contour of each component itself, but the above orientation words are not used to limit the present application.

[0032] In order to solve the problem of offset phenomenon in the process of the top cover into the shell in the prior art, which affects the precision and success rate of press fitting, the present application provides a battery, as shown in Figure 7 The battery includes a battery shell, an electrode assembly, an insulating film 60 and a battery top cover assembly.

[0033] Specifically, the electrode assembly is arranged inside the battery shell, the insulating film 60 is arranged between the outer surface of the electrode assembly and the inner surface of the battery shell, the insulating film 60 is wrapped on the outer peripheral side surface and the bottom surface of the electrode assembly, for insulation between the battery shell and the electrode assembly; the battery top cover assembly is arranged at the top opening side of the battery shell, the battery top cover assembly of the present application has a guiding effect when assembling with the battery shell, and when there is an offset between the battery top cover assembly and the battery shell, the guiding correction can ensure the accurate and stable installation of the battery top cover assembly and the battery shell, and improve the assembly efficiency of the battery.

[0034] Specifically, the electrode assembly includes a positive electrode, a negative electrode and a separator. The electrode assembly can be formed by winding the positive electrode, the negative electrode and the separator, or can be formed by laminating.

[0035] Among them, the battery is a square aluminum shell battery.

[0036] As shown in Figures 1 to 6 The base plate 10 and the lower plastic part 20 are provided with a guide block 110 at the corner of the base plate 10 along one side in the thickness direction of the base plate 10, and the lower plastic part 20 is arranged at one side in the thickness direction of the base plate 10, the guide block 110 extends towards one side of the lower plastic part 20 and is arranged at the outer peripheral side of the lower plastic part 20, and the guide block 110 and the outer wall surface of the lower plastic part 20 form a gap 30 for accommodating the insulating film 60.

[0037] Among them, the base plate 10 is provided with a liquid passing hole and an explosion-proof valve.

[0038] Specifically, the battery top cover assembly of the present application adopts a guide block 110 arranged on the base plate 10, which has a guiding installation effect. In the process of assembling the battery top cover assembly and the battery shell, the structural arrangement of the guide block 110 can be used to realize the technical effect of guiding and correcting installation when the battery top cover assembly deviates, thereby realizing the accurate and stable installation of the battery top cover assembly and the battery shell, and improving the pressing installation precision and success rate in the battery assembly process.

[0039] In the present embodiment, the guide block 110 is made of insulating material, specifically, it can be a hard and wear-resistant material such as PEEK or PTFE; the base plate 10 is made of metal material, and the guide block 110 and the base plate 10 can be connected by one-piece injection molding; the guide block 110 and the base plate 10 can also be fixed by welding, and the guide block 110 and the base plate 10 are independently arranged, and the two split structures are fixed and connected by welding, that is, the guide block 110 and the base plate 10 are fixed and connected by welding after being formed, and the welding method can be ultrasonic welding.

[0040] As Figure 1 and Figure 2 , the guide block 110 of the present application is arranged at the four corner regions of the base plate 10, and forms a gap 30 accommodating the insulating film 60 between the corner region and the lower plastic part 20. The arrangement position of the guide block 110 is conducive to realizing the effect of omnidirectional guiding installation, improving the stability of pressing installation, and improving the installation efficiency of the battery top cover assembly.

[0041] Among them, part of the insulating film 60 extends into the inside of the gap 30.

[0042] Specifically, the gap 30 can limit the insulating film 60, improve the connection reliability between the insulating film and the lower plastic, and further improve the installation efficiency of the battery top cover assembly and the stability of the product structure.

[0043] In the present embodiment, along the circumference of the lower plastic part 20, the insulating film 60 is hot melt connected on the lower plastic part 20, and the hot melt point of the insulating film 60 can avoid the gap 30, thereby facilitating hot melt operation.

[0044] Specifically, the hot melt point of the insulating film 60 can be at the middle position of the length direction of the lower plastic part 20, the middle position of the width direction of the lower plastic part 20, and the position 10mm apart from the corner region in the length direction of the lower plastic part 20.

[0045] Of course, it is not limited to the above-mentioned 10mm, and other lengths can also be used, specifically, the corresponding battery top cover assembly can be adaptively arranged according to the specific size.

[0046] Wherein, the length direction of the substrate 10 and the length direction of the lower plastic part 20 are both Figure 1 The X-direction shown refers to the width direction of the substrate 10 and the width direction of the lower plastic part 20. Figure 1 The Y-direction shown refers to the thickness direction of the substrate 10 and the thickness direction of the lower plastic part 20. Figure 1 The Z direction is shown.

[0047] In this embodiment, the size H of the gap 30 satisfies 1mm≤H≤1.5mm, specifically it can be 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, etc. It should be noted that if the gap 30 is too large, it will affect the strength of the battery top cover assembly, and if the gap 30 is too small, it will be inconvenient to install the insulating film 60.

[0048] like Figures 1 to 3 As shown, the plastic part 20 has mounting plates 210 at both ends along the length direction of the substrate 10. The mounting plates 210 have arc-shaped chamfers 211 at both ends along the width direction of the substrate 10. A gap 30 is formed between the outer side of the chamfers 211 and the inner side of the guide block 110.

[0049] The chamfer 211 is designed to increase the width of the gap 30, so as to ensure that the insulating film 60 can be smoothly inserted and move inside the gap 30.

[0050] Specifically, the mounting plate 210 not only forms a gap 30 with the guide block 110, but also improves the structural strength of the lower plastic part 20 and the structural strength of the gap 30 area.

[0051] In this embodiment, the bottom surface of the mounting plate 210 is flush with the bottom surface of the guide block 110 along the thickness direction of the substrate 10. Thus, the bottom surface of the guide block 110 can also limit the movement of the electrode assembly, preventing it from moving within the housing. The bottom surface of the mounting plate 210 is the surface of the mounting plate 210 facing away from the substrate 10, and the bottom surface of the guide block 110 is the surface of the guide block 110 facing away from the substrate 10.

[0052] like Figure 6 As shown, along the thickness direction of the substrate 10, the outer side of one end of the guide block 110 connected to the substrate 10 is coplanar with the inner side of the battery casing, and the outer side of the other end of the guide block 110 extends toward the center of the substrate 10 to form a guide surface.

[0053] Specifically, during the installation of the battery top cover assembly and the battery housing, the guide surface plays a guiding role during installation, which facilitates installation. When there is an installation misalignment between the battery top cover assembly and the battery housing, the outer side of the end of the guide block 110 connected to the base plate 10 plays a guiding and correcting role when it contacts the battery housing, which helps to improve the pressing efficiency of the battery top cover assembly and the battery housing.

[0054] In this embodiment, the guide block 110 has a first portion 111 and a second portion 112 connected along the thickness direction of the substrate 10, and the first portion 111 is fixedly connected to the substrate 10.

[0055] The outer side of the first part 111 is coplanar with the inner side of the battery casing. The outer side of the second part 112 is a guide surface. One end of the outer side of the second part 112 is connected to the outer side of the first part 111, and the other end of the outer side of the second part 112 extends toward the center of the substrate 10 to form an inclined guide surface.

[0056] Specifically, the first part 111 adopts a structure that is coplanar with the inner surface of the battery casing. This facilitates improved stability of the battery top cover assembly and the battery casing under the guiding action of the guide surface and the outer surface of the first part 111, preventing damage to the battery top cover and battery casing from impacts. Furthermore, the outer surface of the first part 111 can correct any deformation of the battery casing or any misalignment between the battery top cover assembly and the battery casing.

[0057] In this embodiment, the first part 111 and the second part 112 are integrally formed, which helps to ensure the structural strength of the guide block 110 and thus improve the stability of the guide.

[0058] In this embodiment, the extension length of the first part 111 along the thickness direction of the substrate 10 is less than the extension length of the second part 112. The extension length of the second part 112 is greater than the extension length of the first part 111, which not only ensures the structural strength, but also provides good guidance for the structure of the guide block 110.

[0059] like Figure 6 As shown, the outer side of the first part 111 has a first arc-shaped surface segment 1111 that is coplanar with the inner side of the battery casing. The structure of the first arc-shaped surface segment 1111 can avoid the occurrence of bumps and knocks, which is beneficial to improving the safety of use.

[0060] The second arc-shaped section 1121 is connected with the first arc-shaped section 1111 at the first end of the second arc-shaped section 1121 in the thickness direction of the base plate 10, and the second end of the second arc-shaped section 1121 is away from the first part 111. The extension length of the first end of the second arc-shaped section 1121 in the circumferential direction of the guide block 110 is greater than the extension length of the second end of the second arc-shaped section 1121. The second arc-shaped section 1121 is formed as a tapered surface structure, which is beneficial to improve the guiding effect.

[0061] In the embodiment, the lower plastic part 20 is connected with the base plate 10, so as to facilitate the installation and cooperation of the lower plastic part 20 and the base plate 10, and to realize the guiding installation of the battery top cover assembly by using the guide block 110 arranged on the base plate 10.

[0062] As shown in Figure 4 and Figure 5 , one of the base plate 10 and the lower plastic part 20 is provided with a positioning hole 50, and the other is provided with a positioning column 40. The positioning column 40 and the positioning hole 50 are inserted and matched.

[0063] The structure of the positioning hole 50 and the positioning column 40 is beneficial to improve the positioning and installation of the base plate 10 and the lower plastic part 20. The engagement of the positioning column 40 and the positioning hole 50 improves the fastening degree of the lower plastic part 20 and the base plate 10, avoids the deviation of the lower plastic part 20 and the base plate 10, and causes the guide block 110 to not play a corresponding guiding role.

[0064] In the embodiment, the structure of the guide block 110, the positioning column 40 and the positioning hole 50 improves the connection strength of the lower plastic part 20 and the base plate 10. The guide block 110 can have a certain correcting function, avoids the poor press-fitting between the battery top cover assembly and the battery shell, and reduces the scrap rate and improves the excellent rate of the structure of the application.

[0065] In the embodiment, a plurality of groups of positioning columns 40 are arranged along the length direction of the base plate 10. Each group of positioning columns 40 includes at least two positioning columns 40 arranged symmetrically along the width direction of the base plate 10. The positioning column 40 and the positioning hole 50 are arranged one by one. The structure of the plurality of groups of positioning columns 40 and the positioning hole 50 forms a plurality of limiting structures, which is beneficial to ensure the positioning strength between the base plate 10 and the lower plastic part 20, and avoids the deviation of the base plate 10.

[0066] In the embodiment, the positioning hole 50 is arranged on the base plate 10, and the positioning protrusion is formed on the surface of the lower plastic part 20 facing the base plate 10. At least a part of the positioning protrusion extends into the inside of the positioning hole 50 to realize the limiting cooperation of the base plate 10 and the lower plastic part 20.

[0067] From the above description, it can be seen that the above-mentioned embodiments of the utility model realize the following technical effects:

[0068] The battery top cover assembly of the application adopts the guide block 110 arranged on the substrate 10, the guide block 110 has the effect of guiding installation, in the process of assembling the battery top cover assembly and the battery shell, the structure of the guide block 110 can be used to realize the technical effect that the guide block 110 can realize the guiding correction installation when the battery top cover assembly deviates, thereby realizing the accurate and stable installation of the battery top cover assembly and the battery shell, and improving the pressing installation precision and success rate in the battery assembly process.

[0069] The guide block 110 of the application is arranged at the four corner regions of the substrate 10 to realize the effect of omnidirectional guiding installation, improve the stability of the pressing installation, and improve the installation efficiency of the battery top cover assembly.

[0070] The structure of the guide block 110, the positioning column 40 and the positioning hole 50 improves the connection strength of the lower plastic part 20 and the substrate 10, and the guide block 110 can have a certain correction function, so that the battery top cover assembly and the battery shell are not pressed badly, and the structure of the application reduces the scrap rate and improves the excellent rate.

[0071] Obviously, the above-described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the utility model.

[0072] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, work, device, component and / or their combination.

[0073] It should be noted that the terms "first", "second" and the like in the specification and claims of the application and the above-described drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein.

[0074] The above merely is preferred embodiment of the present utility model, and is not for limiting the present utility model, for the person skilled in the art, the present utility model can have various changes and changes. Any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A battery top cover assembly, characterized by, include: A guide block (110) is provided at the corner of a substrate (10) along one side of the thickness direction of the substrate (10). The lower plastic part (20) is disposed on one side of the substrate (10) in the thickness direction. The guide block (110) extends toward the side of the lower plastic part (20) and is disposed on the outer periphery of the lower plastic part (20). A gap (30) for accommodating the insulating film (60) is formed between the guide block (110) and the outer wall surface of the lower plastic part (20).

2. The battery header assembly of claim 1, wherein, The dimension H of the gap (30) satisfies that 1mm≤H≤1.5mm.

3. The battery header assembly of claim 1, wherein, The lower plastic part (20) has mounting plates (210) at both ends along the length direction of the substrate (10). The mounting plates (210) have arc-shaped chamfers (211) at both ends along the width direction of the substrate (10). The gap (30) is formed between the outer side of the chamfer (211) and the inner side of the guide block (110).

4. The battery header assembly of claim 3, wherein, Along the thickness direction of the substrate (10), the bottom surface of the mounting plate (210) is flush with the bottom surface of the guide block (110).

5. The battery cover assembly of claim 1, wherein, The guide block (110) is made of insulating material.

6. The battery top cover assembly according to claim 1, characterized in that, Along the thickness direction of the substrate (10), the outer side of one end of the guide block (110) connected to the substrate (10) is coplanar with the inner side of the battery casing, and the outer side of the other end of the guide block (110) extends toward the center of the substrate (10) to form a guide surface.

7. The battery header assembly of claim 6, wherein, The guide block (110) has a first portion (111) and a second portion (112) connected along the thickness direction of the substrate (10), the first portion (111) being connected to the substrate (10). The outer surface of the first part (111) is coplanar with the inner surface of the battery casing; The outer surface of the second part (112) is the guide surface. One end of the outer surface of the second part (112) is connected to the outer surface of the first part (111), and the other end of the outer surface of the second part (112) extends toward the center of the substrate (10).

8. The battery top cover assembly according to claim 1, characterized in that, One of the substrate (10) and the lower plastic part (20) is provided with a positioning hole (50), and the other is provided with a positioning post (40), and the positioning post (40) and the positioning hole (50) are inserted into each other.

9. The battery header assembly of claim 8, wherein, Multiple sets of positioning posts (40) are provided along the length direction of the substrate (10), and each set of positioning posts (40) includes at least two positioning posts (40) symmetrically arranged along the width direction of the substrate (10).

10. A battery, characterized by include: Battery casing; An electrode assembly disposed inside the battery casing; An insulating film (60) is disposed between the outer surface of the electrode assembly and the inner surface of the battery casing; The battery top cover assembly as claimed in any one of claims 1 to 9, which is arranged at one side of a top opening of the battery case, a portion of the insulating film (60) extends into the inside of the gap (30), and the insulating film (60) is thermally fused to the lower plastic member (20) along the circumference of the lower plastic member (20).

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