Battery top cover piece, battery top cover and battery

Abstract

The utility model relates to a battery top cover piece, a battery top cover and a battery, and relates to the technical field of power batteries. The battery top cover plate comprises a plate body, a mounting hole and a thinning area, the mounting hole is formed in the plate body and penetrates through the plate body; the thinning area is formed on the plate body, the thinning area divides the plate body into an installation area, the installation area is arranged around the installation hole, and the thickness of the installation area is larger than that of the thinning area. According to the battery top cover sheet provided by the invention, the overall volume and weight of the power battery top cover can be reduced, so that the energy density of the power battery is improved, and the cost is reduced.

Description

Technical Field

[0001] This application relates to the field of power battery technology, specifically to a battery top cover sheet, a battery top cover, and a battery. Background Technology

[0002] During the assembly process, the battery cells are connected to the positive and negative terminals via tabs, thus establishing electrical connection between the battery and the external environment. In practice, a top cover is typically provided at the battery end to seal the cells. The terminals then pass directly through and are fixed to the base plate of the top cover.

[0003] However, in the use of the above structure, in order to ensure the strength of the positions of the terminals and explosion-proof valves, and thus ensure the function and safety of the terminals and explosion-proof valves, the substrate of the top cover usually needs to be made relatively thick. Furthermore, the substrate is usually made of aluminum alloy or copper-aluminum composite material, resulting in high material usage and significant weight. This not only leads to higher overall cost of the power battery but also reduces its overall energy density. Utility Model Content

[0004] The purpose of this application is to provide a battery top cover sheet, a battery top cover, and a battery, which can reduce the overall volume and weight of the power battery top cover, thereby increasing the energy density of the power battery and reducing costs.

[0005] To achieve the above objectives, in a first aspect, this application provides a battery top cover sheet, which includes a plate, a mounting hole, and a thinning region. The mounting hole is formed on and penetrates the plate. The thinning region is formed on the plate, dividing the plate into a mounting area, which surrounds the mounting hole, and the thickness of the mounting area is greater than the thickness of the thinning region.

[0006] Based on the embodiments described above, when the battery top cover is used, the plate body serves as the main body of the battery top cover. Mounting holes are formed on the plate body for the fixed installation of the battery explosion-proof valve, positive terminal, and negative terminal, among other structures. By forming a thinning zone on the plate body, the thickness of this thinning zone is reduced, thereby reducing the overall weight and material usage of the battery top cover, increasing the battery energy density while lowering the overall battery cost. Simultaneously, the process of reducing the thickness of the thinning zone naturally creates a mounting area protruding from it. This mounting area retains the original thickness of the plate body, ensuring the strength of the mounting hole positions when the battery top cover is used. This, to a certain extent, prevents deformation of the explosion-proof valve position on the battery top cover when the internal pressure of the battery increases, thus mitigating problems such as sealing failure or premature valve opening caused by battery top cover deformation.

[0007] In some embodiments, the thickness of the thinning area is H4, the thickness of the mounting area is H1, and 0.5H1≤H4

[0008] Based on the above embodiments of this application, the thickness of the thinning area on the plate is limited based on the thickness of the mounting area. This avoids the thinning area from being too thin and affecting the strength, while ensuring that the thickness of the thinning area is less than the thickness of the mounting area. This reduces the overall weight and material usage of the battery top cover, thereby increasing the battery energy density while reducing the overall battery cost.

[0009] In some embodiments, the mounting hole includes an explosion-proof hole, and the mounting area includes a first mounting area formed on the outer periphery of the explosion-proof hole. The thickness of the mounting area is H1, and the width of the first mounting area is H2, where H2 ≥ 2H1.

[0010] Based on the above embodiments of this application, the mounting hole specifically includes an explosion-proof hole for installing and fixing the explosion-proof valve. Furthermore, using the thickness of the mounting area as a reference, the width of the first mounting area is limited to ensure that the first mounting area has sufficient area, thereby ensuring sufficient strength at the location of the explosion-proof hole and reducing the deformation at the location of the explosion-proof hole on the battery top cover when the internal pressure of the battery increases.

[0011] In some embodiments, a liquid injection hole is provided on the plate body, and the liquid injection hole penetrates the plate body. A first installation area is provided between the liquid injection hole and the explosion-proof hole along the length direction of the plate body.

[0012] Based on the embodiments described above in this application, an injection hole is provided on the plate to inject electrolyte into the cell during battery assembly. A first mounting area is formed between the injection hole and the explosion-proof hole to strengthen the area between them and reduce the possibility of electrolyte leakage.

[0013] In some embodiments, the mounting hole includes a pole hole, and the mounting area includes a second mounting area formed on the outer periphery of the pole hole. The thickness of the mounting area is H1, and the width of the second mounting area is H3, where H3 ≥ 2H1.

[0014] Based on the above embodiments of this application, the mounting hole specifically includes a terminal hole for mounting and fixing the terminal. Furthermore, using the thickness of the mounting area as a reference, the width of the second mounting area is limited to ensure that the second mounting area has sufficient area, thereby ensuring sufficient strength at the location of the terminal hole and reducing the deformation at the location of the terminal hole on the battery top cover when the internal pressure of the battery increases.

[0015] In some embodiments, the mounting holes include explosion-proof holes and pole hole holes, with two pole hole holes symmetrically arranged on both sides of the explosion-proof hole along the length of the plate. The mounting area includes a first mounting area and a second mounting area, with the first mounting area extending to the edge of the plate along its width.​

[0016] Based on the embodiments described above, the terminal holes are symmetrically arranged on both sides of the explosion-proof hole, and the second mounting area is also symmetrically arranged on both sides of the first mounting area, thereby ensuring the overall symmetry of the battery top cover's strength. Simultaneously, the first mounting area extends to the edge of the plate, further strengthening the location of the explosion-proof hole.

[0017] In some embodiments, a mounting portion is provided between the mounting hole and the mounting area.

[0018] Based on the embodiments described above, a mounting portion is formed between the mounting hole and the mounting area to fix the terminal post and the explosion-proof valve, thereby strengthening the mounting position and, to a certain extent, preventing the explosion-proof valve from opening prematurely under internal battery pressure. The thickness and other dimensions of the mounting portion can be set according to the strength requirements of the mounting hole location and other requirements, thereby specifically strengthening the location of the mounting hole.

[0019] According to a second aspect of this application, a battery top cover is provided, comprising a positive terminal and a negative terminal, an explosion-proof valve, a lower plastic and an upper plastic, and the aforementioned battery top cover sheet. The lower plastic is attached to one side of the plate, and the upper plastic is attached to the other side of the plate. The positive terminal and the negative terminal are respectively disposed in two terminal holes and penetrate the upper plastic and the lower plastic, respectively. The explosion-proof valve is disposed in an explosion-proof hole.

[0020] Based on the above embodiments of this application, the battery top cover provided by this application includes the above-mentioned battery top cover sheet. Through the above-mentioned arrangement, it is possible to ensure that the explosion-proof valve and the key position where the terminal post is located on the battery top cover sheet have sufficient strength, and to reduce the overall weight and material usage of the battery top cover sheet, thereby reducing the overall weight and material usage of the battery top cover, improving the overall energy density of the battery and reducing the cost.

[0021] In some embodiments, the thinning zone is formed on the side of the sheet facing the lower plastic.

[0022] Based on the above embodiments of this application, the thinning area is formed on the same side of the plate and is located on the side close to the lower plastic, so that the side of the battery top cover sheet away from the lower plastic can remain relatively flat, thereby reducing the space occupied on that side and facilitating subsequent assembly.

[0023] According to a third aspect of this application, a battery is provided, the battery including a cell and the aforementioned battery top cover. The battery top cover is disposed at the end of the cell, and the cell is electrically connected to a positive terminal and a negative terminal, respectively.

[0024] Based on the above embodiments of this application, the battery provided by this application includes the battery top cover described above, and therefore also has the above-mentioned beneficial effects. To avoid repetition, it will not be described again here.

[0025] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0026] The accompanying drawings are provided to further illustrate the present application and form part of the specification. They are used together with the following detailed description to explain the present application, but do not constitute a limitation thereof. In the drawings:

[0027] Figure 1 This is a schematic diagram of the structure of the battery top cover sheet provided in the embodiments of this application.

[0028] Figure 2 This is a cross-sectional schematic diagram of the battery top cover sheet provided in an embodiment of this application.

[0029] Figure 3 This is a planar schematic diagram of a battery top cover sheet provided in one embodiment of this application.

[0030] Figure 4 This is a plan view of a battery top cover sheet provided in another embodiment of this application.

[0031] Figure 5 This is a plan view of the battery top cover sheet provided in the third embodiment of this application.

[0032] Figure 6 This is an exploded schematic diagram of the battery top cover provided in an embodiment of this application.

[0033] Figure 7 This is a cross-sectional schematic diagram of the battery top cover provided in an embodiment of this application.

[0034] Figure 8 yes Figure 7 An enlarged schematic diagram of part A in the middle.

[0035] Explanation of reference numerals in the attached figures

[0036] 1. Plate body; 11. Explosion-proof hole; 12. Terminal hole; 13. Injection hole; 14. Thinning area; 15. Mounting part; 2. First mounting area; 3. Second mounting area; 4. Positive terminal; 5. Negative terminal; 6. Lower plastic; 7. Upper plastic; 8. Sealing ring; 9. Explosion-proof valve; 91. Protective patch. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0040] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0041] In the description of this application, it should be noted that, unless otherwise stated, the terms "inner," "outer," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0042] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0043] During the assembly process of a power battery, the battery cell ends are connected to the positive and negative terminals via tabs, thereby establishing electrical connection between the power battery and the external environment. In the specific assembly process, a top cover is typically provided at the battery end to seal the battery cell. At this point, the terminals directly penetrate and are fixed to the base plate of the top cover.

[0044] When using the above structure, it is necessary to strengthen the positions of the positive and negative terminals and valve body. This is to ensure that the positive and negative terminals and valve body can be stably assembled. On the other hand, the internal pressure of the battery may change during subsequent use. Strengthening the positions of the positive and negative terminals and valve body can, to a certain extent, prevent large deformations in these positions that could lead to electrolyte leakage.

[0045] However, the substrate of the top cover is usually made of aluminum alloy or copper-aluminum composite material. The above-mentioned configuration results in a large amount of material used and a large weight of the substrate, which not only leads to a higher overall cost of the power battery, but also reduces the overall energy density of the power battery.

[0046] To address the aforementioned problems in the prior art, according to a first aspect of this application, embodiments of this application provide a battery top cover. (Reference) Figure 1 and Figure 2 As shown, the battery top cover includes a plate 1, a mounting hole, and a thinning region 14. The mounting hole is formed on the plate 1 and extends through the plate 1. The thinning region 14 is formed on the plate 1, and the thinning region 14 divides the plate 1 into a mounting area. The mounting area is disposed around the mounting hole, and the thickness of the mounting area is greater than the thickness of the thinning region 14.

[0047] Based on the above embodiments of this application, when the battery top cover is used, the plate 1 serves as the main body of the battery top cover. Mounting holes are formed on the plate 1 for the fixed installation of the battery explosion-proof valve 9, the positive terminal 4, and the negative terminal 5. By forming a thinning area 14 on the plate 1, the thickness of the thinning area 14 is reduced, thereby reducing the overall weight and material usage of the battery top cover, increasing the battery energy density while reducing the overall battery cost. Simultaneously, during the reduction of the thickness of the thinning area 14, a mounting area protruding from the thinning area 14 is naturally separated. The mounting area retains the original thickness of the plate 1, thus ensuring the strength of the mounting hole position when the battery top cover is used. This, to a certain extent, avoids the possibility of deformation at the location of the explosion-proof valve 9 on the battery top cover when the internal pressure of the battery increases, thereby preventing problems such as sealing failure of the explosion-proof valve 9 or premature valve opening caused by deformation of the battery top cover.

[0048] Specifically, in existing technologies, during actual processing, the battery top cover is typically designed as a metal plate structure, and various materials can be selected, including aluminum alloy and copper-aluminum composite materials. Mounting holes are then formed by drilling holes in the battery top cover.

[0049] Based on the above-mentioned configuration of this application, in the actual processing of the battery top cover sheet, the plate body 1 can be set first, and then mounting holes can be opened on the plate body 1 to form the mounting structure for the explosion-proof valve 9 and the terminal post, etc. However, unlike the prior art, this application reduces the thickness of a portion of the plate body 1 by forming a thinning zone 14, while retaining the thickness around the mounting holes during the thinning process to form the mounting area. This ensures both the strength of the battery top cover sheet structure at the location of the explosion-proof valve 9 and the terminal post, and reduces the overall weight and material usage of the battery top cover sheet.

[0050] Meanwhile, the thinning area 14 is directly processed by cutting on the plate 1, and the installation area is naturally separated during the processing of the thinning area 14. Therefore, not only is the overall processing simple and quick, but the finished product is still integrated, thus ensuring the overall structural strength of the battery top cover.

[0051] refer to Figure 2 As shown in some embodiments of this application, the thickness of the thinning region 14 is H4 and the thickness of the mounting region is H1, then 0.5H1≤H4

[0052] Based on the above embodiments of this application, the thickness of the thinning area 14 on the plate 1 is limited based on the thickness of the mounting area. This avoids the thinning area 14 from being too thin and affecting the strength, while ensuring that the thickness of the thinning area 14 is less than the thickness of the mounting area. This reduces the overall weight and material usage of the battery top cover, thereby increasing the battery energy density while reducing the overall battery cost.

[0053] Specifically, during the installation of the battery top cover, the weight and material usage of the battery top cover are controlled by reducing the thickness of the thinning zone 14. Furthermore, during the actual production and processing, the thickness of the thinning zone 14 can be adaptively adjusted according to different assembly requirements to form different stepped thicknesses, but it must still meet the aforementioned proportional requirements with the installation zone thickness.

[0054] Alternatively, the entire thinning zone 14 can be set to the same thickness to make the overall strength of the thinning zone 14 more uniform. In this case, the ratio requirement between the above-mentioned thickness and the thickness of the installation zone should also be met.

[0055] refer to Figures 2 to 5 As shown in some embodiments of this application, the mounting hole includes an explosion-proof hole 11 and two pole post holes 12. The mounting area includes a first mounting area 2 and a second mounting area 3. The first mounting area 2 is formed on the outer periphery of the explosion-proof hole 11, and the second mounting area 3 is formed on the outer periphery of the pole post holes 12. The thickness of the mounting area is H1, the width of the first mounting area 2 is H2, and the width of the second mounting area 3 is H3, where H2 ≥ 2H1 and H3 ≥ 2H1.​

[0056] Based on the above embodiments of this application, the mounting holes are specifically divided into explosion-proof holes 11 and terminal post holes 12, which are used for the installation and fixing of the explosion-proof valve 9 and the terminal post, respectively. The thickness of the first mounting area 2 and the second mounting area 3 can be kept consistent, which facilitates both manufacturing and subsequent assembly. Furthermore, based on the thickness of the mounting areas, the width of the first mounting area 2 and the second mounting area 3 is limited to ensure that both have sufficient area, thereby ensuring sufficient strength at the locations of the explosion-proof holes 11 and the terminal post holes 12, and thus reducing the deformation of the explosion-proof holes 11 and the terminal post holes 12 on the battery top cover when the internal pressure of the battery increases.

[0057] Furthermore, it should be noted that the first mounting area 2 and the second mounting area 3 in this application can be set to any suitable shape. For example, when the first mounting area 2 is set, it extends outward from the outer edge of the explosion-proof hole 11 until it reaches the side of the plate 1. At this time, the first mounting area 2 is set as a rectangular structure, and similarly, the second mounting area 3 can also be formed as a rectangular structure.

[0058] Alternatively, when the first mounting area 2 is set, it extends outward from the outer edge of the explosion-proof hole 11, and the outer edge of the first mounting area 2 is also formed into a circular structure. Similarly, the outer edge of the second mounting area 3 can also form a circular structure.

[0059] Alternatively, when the first mounting area 2 is configured, it can be set as a circular or rectangular ring structure centered on the axis of the explosion-proof hole 11. Similarly, the second mounting area 3 can also be set as a circular or rectangular ring structure centered on the pole hole 12.

[0060] Furthermore, based on the above, the width H2 of the first mounting area 2 in this application is not limited to the limitation when the first mounting area 2 is set as a rectangle. In practical applications, the first mounting area 2 can also be set as a non-uniform width structure along the circumference. In this case, the width H2 of the first mounting area 2 refers to the dimension of the narrowest position of the first mounting area 2. Specifically, when the first mounting area 2 is set as a rectangular structure, refer to... Figure 3 As shown, H2 here refers to the shortest distance from the outer edge of the explosion-proof hole 11 to the edge of the first mounting area 2. When the first mounting area 2 is set as a circular or elliptical structure, refer to... Figure 4 As shown, H2 can refer to the shortest distance from the outer edge of the explosion-proof hole 11 to the edge of the first mounting area 2. When the first mounting area 2 is configured as a circular or rectangular ring structure, refer to... Figure 5 As shown in the figure, H2 can refer to the width of the annular or rectangular ring structure formed by the first mounting area 2.

[0061] Similarly, when setting the second mounting area 3, the second mounting area 3 can also be set as a non-uniform width structure along the circumference. In this case, the width H3 of the second mounting area 3 refers to the dimension of the narrowest position of the second mounting area 3. For details, please refer to the various cases corresponding to the width H2 of the first mounting area 2, which will not be elaborated here.

[0062] refer to Figures 2 to 5 As shown in some embodiments of this application, two pole holes 12 can be symmetrically arranged on both sides of the explosion-proof hole 11.

[0063] Based on the above embodiments of this application, the pole hole 12 is symmetrically arranged on both sides of the explosion-proof hole 11, and the second mounting area 3 is also symmetrically arranged on both sides of the first mounting area 2, thereby ensuring the symmetry of the overall strength of the battery top cover.

[0064] Specifically, by setting two pole holes 12 symmetrically on both sides of the explosion-proof valve 9, and two second mounting areas 3 symmetrically on both sides of the first mounting area 2, the battery top cover can be more flexible during assembly, and the two ends of the plate 1 can be flexibly interchanged, thereby simplifying the assembly process and improving production and assembly efficiency.

[0065] refer to Figure 2 and Figure 3 As shown in some embodiments of this application, a liquid injection hole 13 may be provided on the plate 1, and the liquid injection hole 13 penetrates the plate 1. A first mounting area 2 is provided between the liquid injection hole 13 and the explosion-proof hole 11 along the length direction of the plate.

[0066] Based on the embodiments described above, an injection hole 13 is provided on the plate 1 to inject electrolyte into the cell during battery assembly. A first mounting area 2 is formed between the injection hole 13 and the explosion-proof hole 11 to strengthen the area between them and reduce the possibility of electrolyte leakage.

[0067] refer to Figure 5 As shown in some embodiments of this application, a mounting portion 15 may be provided between the mounting hole and the mounting area.

[0068] Based on the embodiments described above, a mounting portion 15 is formed between the mounting hole and the mounting area to fix the terminal post and the explosion-proof valve 9, thereby strengthening the mounting position and preventing the explosion-proof valve 9 from opening prematurely under internal battery pressure. The thickness and other dimensions of the mounting portion 15 can be set according to the strength requirements of the mounting hole location and other requirements, thereby specifically strengthening the location of the mounting hole.

[0069] Based on the above technical solution, and according to the second aspect of this application, a battery top cover is provided, with reference to... Figures 6 to 8As shown, the battery top cover includes a positive terminal 4 and a negative terminal 5, an explosion-proof valve 9, a lower plastic 6 and an upper plastic 7, as well as the aforementioned battery top cover sheet. The lower plastic 6 is attached to one side of the plate 1, and the upper plastic 7 is attached to the other side of the plate 1. The positive terminal 4 and the negative terminal 5 are respectively disposed in two terminal holes 12, and respectively penetrate the upper plastic 7 and the lower plastic 6. The explosion-proof valve 9 is disposed in an explosion-proof hole 11.

[0070] Based on the above embodiments of this application, the battery top cover provided by this application includes the above-mentioned battery top cover sheet. Through the above-mentioned arrangement, it is possible to ensure that the explosion-proof valve 9 and the key positions where the positive terminal 4 and negative terminal 5 are located on the battery top cover sheet have sufficient strength, and at the same time, it is possible to reduce the overall weight and material usage of the battery top cover sheet, thereby reducing the overall weight and material usage of the battery top cover, improving the overall energy density of the battery and reducing the cost.

[0071] Specifically, during the production, processing, and assembly process, the lower plastic 6 can be designed as an integral structure with an overall outline similar to the plate 1, thereby further enhancing the sealing and insulation protection between the plate 1 and the battery cell. At this time, the positive terminal 4, negative terminal 5, and explosion-proof valve 9 all need to pass through the lower plastic 6 during installation. The upper plastic 7 is mainly used for sealing and insulation protection at the positive terminal 4 and negative terminal 5 positions of the battery. Therefore, two upper plastic 7s can be provided, one at the positive terminal 4 and the other at the negative terminal 5, respectively. This allows for simultaneous sealing and insulation protection of the positive terminal 4 and negative terminal 5 from both the inside and outside of the battery top cover, further improving the sealing and insulation protection effects.

[0072] Furthermore, it should be noted that the lower plastic 6 and the upper plastic 7 can be made of any suitable insulating material, such as rubber, plastic, and resin, etc., and the specific choice can be made according to the actual situation. This application does not impose any specific restrictions on this. At the same time, in this application, the explosion-proof valve 9 can be configured with any suitable structure. Any suitable explosion-proof valve 9 structure in the prior art can be selected. Since this application does not involve any improvement to the structure of the explosion-proof valve 9, no specific restrictions are imposed here.

[0073] refer to Figure 6 As shown in some embodiments of this application, the thinning region 14 is formed on the side of the plate 1 facing the lower plastic 6.

[0074] Based on the above embodiments of this application, the thinning area 14 is disposed on the same side of the plate 1 and on the side close to the lower plastic 6, so that the side of the battery top cover sheet away from the lower plastic 6 can remain relatively flat, thereby reducing the space occupied on that side and facilitating subsequent assembly.

[0075] Specifically, during battery assembly, the internal cells are connected to the outside via positive terminal 4 and negative terminal 5. At this time, positive terminal 4 and negative terminal 5 are typically connected via structures such as contact plates. Furthermore, integrated busbars (Cells Contact System, CCS) are installed at the ends of the battery where positive terminal 4 and negative terminal 5 are located to detect and regulate the battery's input and output. By creating a relatively flat surface on the side of the battery top cover away from the lower plastic 6, space occupancy is reduced, leaving more space for subsequent assembly and facilitating the assembly of integrated busbars and other structures.

[0076] refer to Figures 6 to 8 As shown, in some embodiments, the battery top cover also includes two sealing rings 8, which are respectively fitted onto the positive terminal 4 and the negative terminal 5 to enhance the sealing effect between the positive and negative terminal 5 and the terminal hole 12.

[0077] Based on the above embodiments of this application, the sealing effect between the positive and negative terminals and the terminal hole 12 is further enhanced by the setting of the sealing ring 8, reducing the possibility of electrolyte leakage from the terminal hole 12.

[0078] Specifically, during the assembly of the battery top cover, in order to improve the sealing effect between the terminal hole 12 and the positive terminal 4 and the negative terminal 5, a certain amount of compression needs to be left between the lower plastic 6 and the upper plastic 7 when sealing from both sides of the plate 1. That is, a certain gap needs to be set between the upper plastic 7 and the lower plastic 6, so that the sealing effect can be strengthened by pressing the upper plastic 7 and the lower plastic 6 during assembly. At this time, the sealing ring 8 can be made of elastic material such as rubber. The sealing ring 8 can be sleeved on the positive terminal 4 and the negative terminal 5, and the sealing ring 8 is set in the gap between the upper plastic 7 and the lower plastic 6. So that when the upper plastic 7 and the lower plastic 6 are pressed together, they will deform to a certain extent, thereby further enhancing the sealing effect.

[0079] Furthermore, it should be noted that the battery top cover in this application is not limited to the above structure. For example, a protective patch 91 can also be provided at the opening position of the explosion-proof valve 9 to protect the explosion-proof valve 9 from premature opening. Specific configurations can be made according to actual usage requirements, and this application does not impose specific limitations in this regard.

[0080] Based on the above technical solution, according to a third aspect of this application, a battery is provided, the battery including a cell and the aforementioned battery top cover. The battery top cover is disposed at the end of the cell, and the cell is electrically connected to the positive terminal 4 and the negative terminal 5 respectively.

[0081] Based on the above embodiments of this application, the battery provided by this application includes the battery top cover described above, and therefore also has the above-mentioned beneficial effects. To avoid repetition, it will not be described again here.

[0082] In some embodiments of this application, the lower plastic 6 may be disposed between the plate 1 and the battery cell.

[0083] Based on the above embodiments of this application, the lower plastic 6 is disposed between the plate 1 and the battery cell to enhance the sealing and insulation protection between the two. Furthermore, both the first mounting area 2 and the second mounting area 3 are located on the side of the plate 1 facing the battery cell, while the side of the plate 1 facing away from the battery cell is relatively flat, facilitating subsequent assembly with structures such as integrated busbars.

[0084] The preferred embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this application, various simple modifications can be made to the technical solution of this application, and these simple modifications all fall within the protection scope of this application.

[0085] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this application will not describe the various possible combinations separately.

[0086] Furthermore, various different implementations of this application can be combined in any way, as long as they do not violate the spirit of this application, they should also be regarded as the content disclosed in this application.

Claims

1. A battery top cover sheet, characterized in that, The battery top cover includes: plate body; Mounting holes are formed on the plate and penetrate the plate; A thinning zone is formed on the plate body, the thinning zone on the plate body divides into a mounting zone, the mounting zone is disposed around the mounting hole, and the thickness of the mounting zone is greater than the thickness of the thinning zone.

2. The battery top cover sheet according to claim 1, characterized in that, The thickness of the thinning zone is H4, and the thickness of the mounting zone is H1, where 0.5H1≤H4<H1.

3. The battery top cover sheet according to claim 1 or 2, characterized in that, The mounting hole includes an explosion-proof hole, and the mounting area includes a first mounting area, which is formed on the outer periphery of the explosion-proof hole; The thickness of the mounting area is H1, and the width of the first mounting area is H2, where H2 ≥ 2H1.

4. The battery top cover sheet according to claim 3, characterized in that, The plate has an injection hole that penetrates the plate. Along the length of the plate, a first installation area is provided between the injection hole and the explosion-proof hole.

5. The battery top cover sheet according to claim 1 or 2, characterized in that, The mounting hole includes a pole post hole, and the mounting area includes a second mounting area, which is formed on the outer periphery of the pole post hole; The thickness of the mounting area is H1, and the width of the second mounting area is H3, where H3 ≥ 2H1.

6. The battery top cover sheet according to claim 1 or 2, characterized in that, The mounting hole includes an explosion-proof hole and an electrode hole. There are two electrode holes, which are symmetrically arranged on both sides of the explosion-proof hole along the length of the plate. The mounting area includes a first mounting area and a second mounting area. Along the width direction of the plate, the first mounting area extends to the edge of the plate.

7. The battery top cover sheet according to claim 1 or 2, characterized in that, An installation part is provided between the mounting hole and the mounting area.

8. A battery top cover, characterized in that, The battery top cover includes: Positive and negative terminals; Explosion-proof valve; The lower plastic and the upper plastic; and, According to any one of claims 1-7, the lower plastic is attached to one side of the plate, the upper plastic is attached to the other side of the plate, the positive terminal, the negative terminal and the explosion-proof valve are respectively disposed in the mounting hole, and the positive terminal and the negative terminal respectively penetrate the upper plastic and the lower plastic.

9. The battery top cover according to claim 8, characterized in that, The thinning zone is formed on the side of the plate facing the lower plastic.

10. A battery, characterized in that, The battery includes: Battery cells; and, The battery top cover as described in claim 8 or 9, wherein the battery top cover is disposed at the end of the battery cell, and the battery cell is electrically connected to the positive terminal and the negative terminal respectively.

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