Battery cover plate and battery

Abstract

The utility model provides battery cover plate and battery, battery cover plate includes pole, cover plate body, connecting piece, patch, sealing element and insulation piece etc. The pole adopts the design of echelon, has pole first part and pole second part of echelon arrangement in turn along the first direction, and each part sets up step part to adapt different component connection, is equipped with the welding hole and the accommodation groove on the connecting piece, realizes the stable connection with the pole through welding, and the accommodation groove is used for accommodating the weld and installs the patch, prevents the welding slag from falling; The sealing element is pressed into the through hole in the cover plate body, realizes reliable sealing; The insulation piece is arranged between the pole and the cover plate body, prevents the electrical short circuit. The battery cover plate passes through the optimization structure design, has improved the current transmission efficiency and the connection reliability, has strengthened the sealing and the electrical insulation performance, has effectively prevented the welding slag from falling, has guaranteed the safe operation of battery, has promoted the overall performance, safety and reliability of battery.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to battery covers and batteries. Background Technology

[0002] In the field of battery technology, the battery cover, as a key component of a battery, undertakes multiple functions, including current transmission, encapsulating the internal structure of the battery, and realizing electrical connections. However, existing battery covers still face many technical challenges in design and practical application.

[0003] In terms of current transfer efficiency, traditional battery covers have unreasonable structural design, resulting in complex current transfer paths, increased resistance, and severe current loss, which cannot meet the high-efficiency current transfer requirements of high-power batteries.

[0004] In the manufacturing process of battery cover plates, the issue of weld slag protection also urgently needs to be addressed. If weld slag falls onto the surface of critical components, it will not only affect the connection effect but may also cause safety hazards such as short circuits. Therefore, how to design a battery cover plate with efficient current transmission capability, stable structural connection, reliable electrical insulation performance, and good weld slag protection effect has become a technical problem that urgently needs to be solved in the current battery technology field. Utility Model Content

[0005] Therefore, it is necessary to address the technical problems caused by the shortcomings of traditional battery covers in terms of current conduction, structural encapsulation, and electrical isolation, which lead to poor battery performance, safety, and reliability. This would improve the battery's performance in terms of current conduction, structural encapsulation, and electrical isolation, thereby enhancing the overall performance, safety, and reliability of the battery.

[0006] The first aspect of this utility model provides a battery cover plate, including: a terminal post, the terminal post having a first part and a second part of the terminal post arranged sequentially along a first direction, and in the first direction, the first part of the terminal post having a first step portion and a second step portion arranged progressively farther away from the second part of the terminal post.

[0007] The cover plate body is located below the first part of the pole post, and the cover plate body is provided with a first through hole for the second part of the pole post to pass through.

[0008] The second connector is provided with a first welding hole for welding the second step portion, and the second step portion is inserted into the first welding hole and welded and fixed to the first welding hole;

[0009] The first connector is located above the cover plate body. In the first direction, the first connector is provided with a first mounting groove, a second mounting groove and a third mounting groove that are gradually closer to the cover plate body. The first mounting groove, the second mounting groove and the third mounting groove are respectively fitted with the second connector, the second step and the first step.

[0010] The third connector is welded and fixed to the second part of the terminal post. This structural design, through the stepped design of the terminal post, ensures efficient current conduction while enabling compatible connections with different components, dispersing stress concentration, and improving connection reliability. Simultaneously, the welding of each connector to the terminal post, along with the design of the receiving groove and positioning protrusion, optimizes the welding process window, ensuring precise positioning during assembly, which is beneficial for stable current transmission. Furthermore, the patch covering the receiving groove prevents weld slag from falling off, ensuring connection effectiveness and improving the electrical connection reliability of the battery cover.

[0011] In other embodiments, in the first direction, a first receiving groove that expands outward from the first welding hole is provided on the end face of the second connector away from the cover plate body, and a first positioning protrusion is provided on the end face of the second step away from the first step, extending into the first receiving groove; a first patch is interference-fitted onto the first positioning protrusion, and the first patch covers the first receiving groove. The design of the first receiving groove and the first positioning protrusion ensures accurate positioning during assembly, so that when the first connector is connected to the corresponding conductive component, the first positioning protrusion on the electrode post can also directly contact the corresponding conductive component, thereby realizing direct current transmission from the electrode post, improving the current transmission effect, and further optimizing the electrical performance of the battery cover plate. At the same time, the first patch covering the first receiving groove prevents welding slag from falling off, ensuring the connection effect and improving the electrical connection reliability of the battery cover plate.

[0012] In other embodiments, the third connector is provided with a second welding hole for welding the second part of the pole post, and the second part of the pole post passes through the first through hole and is welded and fixed to the second welding hole;

[0013] In the first direction, the second part of the electrode post is provided with a third step and a fourth step, which are progressively farther away from the first part of the electrode post. The design of the third and fourth steps allows the electrode post to achieve a tighter connection with the third connector and the electrode lug, improving current conduction efficiency. The design of the variable diameter hole allows for better adaptation to the stepped structure of the second part of the electrode post during welding, improving welding quality.

[0014] In other embodiments, in the first direction, a second receiving groove is provided on the end face of the third connector away from the cover plate body, which expands outward from the second welding hole; a second positioning protrusion is provided on the end face of the fourth step portion away from the third step portion, and the second positioning protrusion extends into the second receiving groove; a second patch is interference-fitted onto the second positioning protrusion, and the second patch covers the second receiving groove. The second receiving groove provides installation space for the second patch and prevents welding marks from protruding from the end face of the third connector away from the cover plate body, thus avoiding affecting the subsequent connection with the electrode tab. The second positioning protrusion ensures accurate installation of the second patch and improves assembly efficiency. The second patch covering the second receiving groove prevents welding slag from falling between the second part of the electrode post and the electrode tab, ensuring the connection effect and improving the electrical connection reliability of the battery cover plate.

[0015] In other embodiments, after the first patch is installed, in a first direction, the end faces of the first patch, the first connector, and the second connector away from the cover plate body are on the same plane; after the second patch is installed, in the first direction, the end faces of the second patch and the third connector away from the cover plate body are on the same plane. This design not only improves the appearance quality of the battery cover plate but also ensures a tight connection with other mating parts, improving current conduction efficiency. Simultaneously, the presence of the first and second positioning protrusions allows current to be directly transmitted through the terminals, improving current transmission efficiency, while also allowing current to be indirectly transmitted through the various connectors.

[0016] In other embodiments, both the first and second patches are made of conductive materials, including aluminum or copper. Selecting appropriate materials based on the different positive and negative terminals of the battery can meet the requirements for current transmission and match the material of the tabs, which is beneficial for achieving a stable electrical connection and improving the conductivity of the battery cover.

[0017] In other embodiments, the battery cover further includes a sealing element, which is press-fitted into the first through hole and sleeved on the outer periphery of the third step. The sealing element achieves a seal through radial interference, ensuring sealing reliability while preventing failure due to excessive compression. On the one hand, this improves overall sealing performance, preventing electrolyte leakage inside the battery and avoiding corrosion and damage to the external environment and other components caused by the electrolyte; on the other hand, the sealing element, together with the first and second insulating elements, provides isolation and insulation between the cover body and the terminals, preventing electrical faults such as short circuits inside the battery and ensuring safe battery operation.

[0018] In other embodiments, the battery cover further includes a first insulating member and a second insulating member; the first insulating member includes a bottom and a side portion extending from the outer edge of the bottom in a first direction away from the cover body, the first connecting member is disposed within the mounting space enclosed by the side portion and the bottom, and the bottom is provided with a first through hole for the third step portion to pass through; the second insulating member is disposed between the cover body and the third connecting member, and the second insulating member is provided with a second through hole for the third step portion to pass through. The first and second insulating members effectively prevent electrical short circuits between the terminal and the cover body, and between the terminal, the third connecting member and the cover body, ensuring the electrical safety of the battery. Simultaneously, the second insulating member also provides a certain buffering and protective function, reducing damage to the internal structure of the battery cover caused by vibration, impact, and other factors.

[0019] The second aspect of this utility model provides a battery including the aforementioned battery cover. Due to the numerous advantages and characteristics of the battery cover, the battery incorporating this cover exhibits excellent performance, safety, and reliability. Through the synergistic effect of the components within the battery cover, not only is the battery's sealing improved, but electrical insulation is also achieved, ensuring the battery's safe operation. Simultaneously, the design of the first and second patches in the battery cover effectively prevents solder slag from falling off, ensuring a good connection and improving the electrical connection reliability of the battery. The first patch can also participate in current transmission, further improving the battery's current delivery efficiency, thus enhancing the overall performance of the battery. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the battery cover plate in Embodiment 1 of this application.

[0021] Figure 2 This is a top view of the battery cover in Embodiment 1 of this application.

[0022] Figure 3 for Figure 2 A sectional view along line A.

[0023] Figure 4 for Figure 3 A magnified view of part B in the middle.

[0024] Figure 5 A schematic diagram of the structure of the pole post and the first patch in Embodiment 1 of this application.

[0025] Figure 6 A schematic diagram of the structure of the pole and the second patch in Embodiment 1 of this application.

[0026] Figure 7 A cross-sectional view of the first connector in this application.

[0027] Figure label:

[0028] 100, pole post; 200, first insulating component; 300, cover plate body; 400, first connector; 500, first patch; 600, second connector; 700, second insulating component; 800, third connector; 900, second patch; 1000, sealing component;

[0029] 110. First part of the pole post; 120. Second part of the pole post; 1101. First step; 1102. Second step; 1103. First positioning protrusion; 1201. Third step; 1202. Fourth step; 1203. Second positioning protrusion;

[0030] 201. Side; 202. Bottom;

[0031] 301, First through hole;

[0032] 401. First mounting slot; 402. Second mounting slot; 403. Third mounting slot;

[0033] 501, Second through hole;

[0034] 601. First welding hole; 602. First receiving groove;

[0035] 801. Second welding hole; 802. Second receiving groove;

[0036] 901, Third through hole. Detailed Implementation

[0037] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0038] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are 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 of this application.

[0039] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0041] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0042] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0043] Example 1

[0044] This embodiment discloses a battery cover that significantly improves the connection effect, sealing performance, and current conduction efficiency of the battery cover by optimizing the structure and assembly method of the terminals, connectors, and related components. The specific structure of the battery cover is described in detail below with reference to the accompanying drawings.

[0045] like Figures 5-6 As shown, the terminal 100 in this embodiment is used to realize the electrical connection between the inside and outside of the battery. The terminal 100 has a first terminal portion 110 and a second terminal portion 120 arranged sequentially along a first direction. In this embodiment, the first terminal portion 110 and the second terminal portion 120 are integrally formed, and are written in two parts for ease of description.

[0046] In this embodiment, the first direction is the axial direction of the pole post 100, and the second direction is one of the radial directions of the pole post 100.

[0047] like Figure 5 As shown, in the first direction, the first part 110 of the pole post is provided with a first step 1101 and a second step 1102 that are progressively farther away from the second part 120 of the pole post, that is, the first step 1101 is closer to the second part 120 of the pole post than the second step 1102.

[0048] In this embodiment, the cross-sectional area of ​​the first step portion 1101 is larger than that of the second step portion, so that the first part 110 of the pole post can be stuck at the upper end of the first through hole 301, and at the same time facilitates the subsequent structure of the first connector 400 to limit the pole post 100 in the first direction axial direction.

[0049] A first positioning protrusion 1103 is provided on the end face of the second step portion 1102 away from the first step portion 1101, and the first positioning protrusion 1103 extends into the first receiving groove 602. A first patch 500 is interference-fitted on the first positioning protrusion 1103, and the first patch 500 covers the first receiving groove 602. A second through hole 501 corresponding to the first positioning protrusion 1103 is provided on the first patch 500. The inner diameter of the second through hole 501 is slightly smaller than the outer diameter of the first positioning protrusion 1103 to achieve an interference fit.

[0050] like Figure 6 As shown, in the first direction, the second part 120 of the pole post is provided with a third step 1201 and a fourth step 1202 that are progressively farther away from the first part 110 of the pole post, that is, the third step 1201 is closer to the first part 110 of the pole post than the fourth step 1202.

[0051] A second positioning protrusion 1203 is provided on the end face of the fourth step portion 1202 away from the third step portion 1201. The design of the third step portion 1201 and the fourth step portion 1202 allows the pole post 100 to achieve a tighter connection with the third connector 800 and the tab, improving current conduction efficiency. The second positioning protrusion 1203 facilitates the subsequent installation and positioning of the second patch 900.

[0052] In this embodiment, as Figure 6 As shown, the cross-sectional area of ​​the fourth step portion 1202 is smaller than that of the third step portion 1201, so that after being connected to the second welding hole 801, the second part 120 of the pole post can be limited in the first direction.

[0053] In this embodiment, the cover plate body 300 is located below the first part 110 of the pole post. The cover plate body 300 is provided with a first through hole 301 for the second part 120 of the pole post to pass through.

[0054] like Figure 4 As shown, the diameter of the first through hole 301 matches the outer diameter of the second part 120 of the pole post, ensuring that the pole post 100 can stably pass through the cover plate body 300 while ensuring sealing.

[0055] like Figure 3 and Figure 4 As shown, in this embodiment, the second connector 600 is provided with a first welding hole 601 for welding the second stepped portion 1102. The second stepped portion 1102 is inserted into the first welding hole 601 and welded to the first welding hole 601 for fixation.

[0056] like Figures 1-4 As shown, the second connector 600 in this embodiment is made of a material with good electrical conductivity, such as copper or aluminum. The fit between the first welding hole 601 and the second stepped portion 1102 ensures the strength and conductivity of the weld. Laser welding or ultrasonic welding can be used to achieve an efficient and stable connection.

[0057] In the first direction, the first welding hole 601 covers the circumferential outer wall of the second step portion 1102, so that the second step portion 1102 does not extend beyond the first welding hole 601, thus avoiding the pole post 100 from protruding and affecting subsequent assembly, and also providing space for setting the first receiving groove 602 on the second connector 600.

[0058] In the first direction, the end face of the second connector 600 away from the cover plate body 300 is provided with a first receiving groove 602 that expands outward from the first welding hole 601.

[0059] The first receiving groove 602 in this embodiment is mainly designed to prevent weld protrusions from affecting the connection between the second connector 600 and other mating parts. By providing the first receiving groove 602, the weld is contained within it, preventing protrusion, and simultaneously providing installation space for the first patch 500. The first positioning protrusion 1103 ensures accurate installation of the first patch 500, improving assembly efficiency. The first patch 500 is made of a material with good electrical conductivity, such as copper or aluminum, to cover the welding hole, block the weld mark, and prevent weld slag from falling off.

[0060] like Figure 7 As shown, the first connector 400 is located above the cover plate body 300. In the first direction, the first connector 400 is provided with a first mounting groove 401, a second mounting groove 402, and a third mounting groove 403 that are progressively closer to the cover plate body 300. The first mounting groove 401, the second mounting groove 402, and the third mounting groove 403 are respectively fitted with the second connector 600, the second step portion 1102, and the first step portion 1101. Specifically, the first mounting groove 401 is used to fit the second connector 600, the second mounting groove 402 is used to fit the second step portion 1102, and the third mounting groove 403 is used to fit the third step portion 1101.

[0061] In this embodiment, the inner diameter of the first welding hole 601 is the same as that of the second mounting groove 402, and it is matched with the second step portion 1102 to improve the assembly accuracy.

[0062] The first connector 400 is also a conductive metal, usually copper or aluminum. In this embodiment, the first connector 400 and the second connector 600 are made of different materials and are processed by a semi-molten rolling composite process. When the electrode 100 is applied to the positive electrode of the battery, the electrode 100 is made of aluminum. At this time, the second connector 600 welded to the electrode 100 is also made of aluminum. The two are made of the same material, which is convenient for welding. The first connector 400 is made of copper.

[0063] Conversely, when the terminal 100 is used as the negative terminal of the battery, the terminal 100 is made of copper, and the second connector 600 is also made of copper, then the first connector 400 is made of aluminum.

[0064] Meanwhile, after the first connector 400 and the second connector 600 are processed, the first connector 400 can also be fixed by welding the second connector 600 to the pole post 100, thus forming an integrated structure.

[0065] In this embodiment, as Figure 4 As shown, the third connector 800 is provided with a second welding hole 801 for welding the second part 120 of the pole post. After passing through the first through hole 301, the second part 120 of the pole post is welded and fixed to the second welding hole 801. The second welding hole 801 is a variable diameter hole to accommodate the size difference between the third step part 1201 and the fourth step part 1202, covering all of the fourth step part 1202 and part of the third step part 1201. In this embodiment, "covering" refers to covering the side wall of the fourth step part 1202 in the first direction, preventing the fourth step part 1202 from extending out of the second welding hole 801 and thus affecting subsequent assembly.

[0066] The third connector 800 is also made of a material with good electrical conductivity, such as copper or aluminum, depending on the location of the pole 100, and is generally made of the same material as the pole 100. The fit between the second welding hole 801 and the second part 120 of the pole ensures the strength and conductivity of the weld. The design of the variable diameter hole allows for better adaptation to the stepped structure of the second part 120 of the pole during welding, improving the weld quality.

[0067] In the first direction, a second receiving groove 802, which expands outward from the second welding hole 801, is provided on the end face of the third connector 800 away from the cover plate body 300. A second positioning protrusion 1203 is provided on the end face of the fourth step portion 1202 away from the third step portion 1201, and the second positioning protrusion 1203 extends into the second receiving groove 802. A second patch 900 is interference-fitted onto the second positioning protrusion 1203, and the second patch 900 covers the second receiving groove 802. A second through hole 901 corresponding to the second positioning protrusion 1203 is provided on the second patch 903. The inner diameter of the second through hole 901 is slightly smaller than the outer diameter of the second positioning protrusion 1203 to achieve an interference fit.

[0068] The second receiving groove 802 provides installation space for the second patch 900 and prevents solder marks from protruding from the end face of the third connector 800 away from the cover plate body 300, thus avoiding interference with the subsequent connection with the electrode tab. The second positioning protrusion 1203 ensures accurate installation of the second patch 900 and improves assembly efficiency. The second patch 900 is also made of a material with good conductivity, such as copper or aluminum, to cover the welding hole, block the solder marks, and prevent solder slag from falling between the second part 120 of the electrode post and the electrode tab.

[0069] In this embodiment, after the first patch 500 is installed, in the first direction, the end faces of the first patch 500, the first connector 400, and the second connector 600 that are away from the cover plate body 300 are on the same plane.

[0070] After the second patch 900 is installed, in the first direction, the end faces of the second patch 900 and the third connector 800 that are away from the cover plate body 300 are on the same plane.

[0071] The installation of the first patch 500 and the second patch 900 not only improves the appearance quality of the battery cover but also ensures a tight connection with other connectors, improving current conduction efficiency. Simultaneously, both the first patch 500 and the second patch 900 are made of conductive materials, including either aluminum or copper, depending on the position of the terminal 100. When the terminal 100 is the positive terminal, aluminum is used for both the first patch 500 and the second patch 900; otherwise, copper is used. Therefore, after connection, the presence of the first positioning protrusion 1103 and the second positioning protrusion 1203 allows current to be directly transmitted through the terminal 100, improving current transmission efficiency, while also enabling indirect current transmission through various connectors.

[0072] like Figure 3-4 As shown in the figure, to ensure sealing performance, the battery cover also includes a sealing element 1000, which is made of a non-conductive material, press-fitted into the through hole and sleeved on the outer periphery of the second part of the connector. The sealing element 1000 achieves sealing through radial interference, ensuring sealing reliability while avoiding failure due to excessive compression. On the one hand, it improves the overall sealing performance; on the other hand, the sealing element 1000, together with the first insulating element 200 and the second insulating element 700, achieves isolation and insulation between the cover body 300 and the terminal post 100, preventing electrical faults such as short circuits inside the battery and ensuring the safe operation of the battery.

[0073] In terms of insulation design, the battery cover also includes a first insulating element 200 and a second insulating element 700.

[0074] like Figure 3 As shown, the first insulating member 200 includes a bottom 202 and a side portion 201 extending from the outer edge of the bottom 202 in a first direction away from the cover plate body 300. The first connecting member 400 is disposed within the mounting space enclosed by the side portion 201 and the bottom 202. The bottom 202 is provided with a first through hole 301 for the third step portion 1201 to pass through. The provision of the first insulating member 200 effectively prevents electrical short circuits between the terminal post 100 and the cover plate body 300, ensuring the electrical safety of the battery.

[0075] like Figure 3 As shown, the second insulating member 700 is disposed between the cover plate body 300 and the third connecting member 800, and the second insulating member 700 is provided with a second through hole for the third stepped portion 1201 to pass through. The second insulating member 700 separates the second part 120 of the terminal post from the cover plate body 300, further enhancing the electrical insulation performance of the battery cover and preventing electrical short circuits between different components. At the same time, the second insulating member 700 also plays a certain role in buffering and protection, reducing damage to the internal structure of the battery cover caused by vibration, impact and other factors.

[0076] Example 2

[0077] This embodiment discloses a battery that includes the battery cover plate described in detail in Embodiment 1 above. Because the battery cover plate has the many advantages and characteristics mentioned above, the battery containing this cover plate exhibits excellent performance, safety, and reliability, which will not be elaborated upon further here.

[0078] In summary, batteries incorporating the aforementioned battery cover exhibit significant advantages in performance, safety, and reliability, meeting the demands of various application scenarios and possessing broad market application prospects. The design and manufacturing process of this battery cover fully considers the various characteristics and usage requirements of the battery. Through rational structural design and material selection, optimizations have been achieved in current transmission, encapsulation protection, and electrical insulation, providing strong support for the high-performance operation of the battery.

[0079] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0080] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A battery cover, characterized in that, include: The pole has a first part and a second part arranged sequentially along a first direction. In the first direction, the first part of the pole has a first step and a second step that are progressively farther away from the second part of the pole. In the first direction, the cover plate body is located below the first part of the pole post, and the cover plate body is provided with a first through hole for the second part of the pole post to pass through. The second connector is provided with a first welding hole for welding the second step portion, and the second step portion is inserted into the first welding hole and welded and fixed to the first welding hole; In the first direction, the first connector is located above the cover plate body. The first connector is provided with a first mounting groove, a second mounting groove and a third mounting groove that are gradually closer to the cover plate body. The first mounting groove, the second mounting groove and the third mounting groove are respectively fitted with the second connector, the second step and the first step. The third connector is welded and fixed to the second part of the pole post.

2. A battery cover according to claim 1, characterized in that, In the first direction, a first receiving groove that expands outward from the first welding hole is provided on the end face of the second connector away from the cover plate body.

3. A battery cover according to claim 2, characterized in that, In a first direction, a first positioning protrusion is provided on the end face of the second step portion away from the first step portion, and the first positioning protrusion extends into the first receiving groove; a first patch is interference-fitted on the first positioning protrusion, and the first patch covers the first receiving groove.

4. A battery cover according to claim 3, characterized in that, The third connector is provided with a second welding hole for welding the second part of the pole post, and the second part of the pole post passes through the first through hole and is welded and fixed to the second welding hole; In the first direction, the second part of the pole post is provided with a third step and a fourth step that are progressively farther away from the first part of the pole post.

5. A battery cover according to claim 4, characterized in that, In the first direction, the end face of the third connector away from the cover plate body is provided with a second receiving groove that expands outward from the second welding hole.

6. A battery cover according to claim 5, characterized in that, In the first direction, a second positioning protrusion is provided on the end face of the fourth step portion away from the third step portion, and the second positioning protrusion extends into the second receiving groove; a second patch is interference-fitted on the second positioning protrusion, and the second patch covers the second receiving groove.

7. A battery cover according to claim 6, characterized in that, After the first patch is installed, in the first direction, the end faces of the first patch, the first connector, and the second connector that are away from the cover plate body are on the same plane; After the second patch is installed, in the first direction, the end faces of the second patch and the third connector that are away from the cover plate body are on the same plane; Both the first patch and the second patch are made of conductive materials, including either aluminum or copper.

8. A battery cover according to claim 4, characterized in that, It also includes a sealing element, which is press-fitted into the first through hole and sleeved on the outer periphery of the third step portion.

9. A battery cover according to claim 4, characterized in that, It also includes a first insulating component and a second insulating component; The first insulating member includes a bottom and a side portion extending from the outer edge of the bottom in a first direction away from the cover plate body. The first connecting member is disposed within the mounting space enclosed by the side portion and the bottom. The bottom portion is provided with a first through hole for the third step portion to pass through. The second insulating member is disposed between the cover plate body and the third connecting member, and the second insulating member is provided with a second through hole for the third step portion to pass through.

10. A battery, characterized in that, It includes a battery cover as described in any one of claims 1-9.

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