Battery cover plate assembly and battery
By optimizing the structure of the battery cover assembly and utilizing insulating components and snap-fit structures, the problem of large space occupation by the tabs and connecting pieces was solved, improving space utilization and process stability, and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SVOLT ENERGY TECHNOLOGY CO LTD
- Filing Date
- 2025-05-13
- Publication Date
- 2026-06-09
AI Technical Summary
In the existing technology, the electrode tabs and connecting pieces of a single cell need to be bent between the cover plate and the end of the electrode assembly, which occupies a lot of space, has low space utilization, low yield of the connecting piece bending process, and high overall product cost.
A battery cover assembly was designed, including a cover plate, an insulator, a connecting piece, and a terminal post. By using the avoidance notch and snap-fit structure of the insulator, the lead-out path of the terminal tab is optimized, and the welding and bending processes of the connecting piece are reduced, thereby increasing space utilization and process stability.
It improves the utilization rate of the battery's internal space, reduces the welding difficulty of the connecting pieces, enhances process stability and battery safety, and reduces product costs.
Smart Images
Figure CN224342364U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery technology, and in particular to a battery cover assembly and a battery. Background Technology
[0002] Currently, a power battery is a type of rechargeable battery that provides power to electric vehicles and is one of the core components of new energy vehicles. It can store and release large amounts of electrical energy to support the operation of electric vehicles, and its performance and stability are crucial to the driving range, safety, and lifespan of electric vehicles. A power battery typically consists of multiple individual cells, each of which usually includes an electrode assembly, connecting plates, and terminals. The terminals are connected to the tabs of the electrode assembly via connecting plates. Currently, both the tabs and connecting plates of the electrode assembly need to be bent between the cover plate and the end of the electrode assembly, occupying a large amount of space and resulting in low space utilization. Furthermore, the bending process of the connecting plates has a low yield rate, leading to high overall product costs. Utility Model Content
[0003] The purpose of this application is to provide a battery cover assembly and a battery, which to some extent solves the technical problems existing in the prior art where the electrode tabs and connecting pieces of the electrode assembly in a single cell need to be bent between the bottom of the cover and the end of the electrode assembly, occupying a large space, resulting in low space utilization, low yield of the connecting piece bending process, and high overall product cost.
[0004] This application provides a battery cover assembly, including: a cover plate, a first insulating member, a second insulating member, a connecting piece, a terminal post, and a sealing plate; wherein, the first insulating member is disposed on one side of the cover plate along a first preset direction, and a mounting cavity is formed between the first insulating member and the cover plate, the second insulating member and the connecting piece are both disposed in the mounting cavity, and the second insulating member is disposed between the connecting piece and the cover plate;
[0005] The pole post is disposed on the cover plate and connected to the connecting piece; the first insulating member has a first clearance notch, the second insulating member has a second clearance notch, and both are used as lead-out channels for the electrode tabs of the electrode assembly; the cover plate has a third clearance notch, the sealing plate is installed in the third clearance notch, and is used to cover the electrode tabs; one of the first insulating member and the second insulating member has a snap-fit part, and the other has a slot, and the snap-fit part is snapped into the slot.
[0006] In the above technical solution, the latching part is further arranged in a ring along the circumferential edge of the first insulating member or the second insulating member, and the latching groove is an annular groove corresponding to the latching part.
[0007] In any of the above technical solutions, one of the first insulating member and the second insulating member is formed with a positioning protrusion, and the other is formed with a positioning hole, and the positioning protrusion is inserted into the positioning hole and connected by heat fusion or welding.
[0008] In any of the above technical solutions, the second insulating member is further provided with a protective rib arranged circumferentially along the second clearance notch, and the protective rib extends into the third clearance notch to space the sidewall of the third clearance notch from the connecting piece.
[0009] In any of the above technical solutions, the second insulating member is further provided with a recessed platform disposed along the outer periphery of the protective rib, and the opening of the recessed platform is disposed facing the cover plate, so that the part of the structure of the second insulating member near the third clearance notch is separated from the cover plate.
[0010] In any of the above technical solutions, further, along the first preset direction, the depth of the sinking platform is h, and 0.25mm≤h≤1.2mm.
[0011] In any of the above technical solutions, further, along the second preset direction, the width of the sinking platform is a, and 0.25mm≤a≤1.2mm.
[0012] In any of the above technical solutions, further, along the first preset direction, a protrusion is formed on the side of the pole near the pole group, so that a clearance groove is formed on the side of the pole, a portion of the structure of the connecting piece extends into the clearance groove, and the connecting piece is connected to the side wall of the clearance groove along the first preset direction by welding.
[0013] In any of the above technical solutions, the battery cover assembly further includes an explosion-proof valve, the sealing plate has a second mounting through hole extending along the first preset direction, and the explosion-proof valve is installed in the second mounting through hole; along the first preset direction, the first insulating member has a first pressure relief through hole, and the first pressure relief through hole can be connected to the explosion-proof valve via the second clearance notch.
[0014] In any of the above technical solutions, further, along the first preset direction, the cover plate is formed with an injection hole, the first insulating member is formed with a first injection clearance notch, and the first injection clearance notch, the second clearance notch and the injection hole are sequentially connected.
[0015] In any of the above technical solutions, the cover plate is further provided with a first mounting through hole extending along a first preset direction, and the electrode post is installed in the first mounting through hole; the battery cover plate assembly further includes a third insulating member, the third insulating member is disposed on the side of the cover plate opposite to the electrode assembly, and the third insulating member is disposed between the electrode post and the cover plate;
[0016] The battery cover assembly also includes a sealing ring disposed in the first mounting through hole, with the end of the sealing ring extending to the inner side of the cover and located in the third mounting through hole formed by the second insulating member. The sealing ring is pressed together by the cover, the terminal post, the connecting piece, and the second insulating member.
[0017] In any of the above technical solutions, the first insulating element is further connected to the cover plate by welding.
[0018] In any of the above technical solutions, the sealing plate and the cover plate are further connected by welding.
[0019] In any of the above technical solutions, the sealing plate is further made of an insulating material.
[0020] This application also provides a battery including the battery cover assembly described in any of the above technical solutions, and thus has all the beneficial technical effects of the battery cover assembly, which will not be repeated here.
[0021] In the above technical solution, the battery further includes a housing and an electrode assembly; wherein the electrode assembly is installed inside the housing, and the battery cover assembly is installed at the open end of the housing; the electrode tabs of the electrode assembly pass sequentially through the first clearance notch of the first insulating member and the second clearance notch of the second insulating member to the third clearance notch of the cover plate, and the electrode tabs are bent and welded together with the connecting piece; the sealing plate is installed in the second clearance notch and covers the electrode tabs.
[0022] Compared with the prior art, the beneficial effects of this application are as follows:
[0023] This application provides an integrated structure of a cover plate and a connecting piece, which reduces the welding process between the connecting piece and the electrode post and the bending process of the connecting piece, greatly improving the space utilization inside the battery. Furthermore, an insulating protective component, namely the first insulating component, is provided on the bottom side of the cover plate to prevent the electrode assembly from being damaged during welding of the connecting piece and to provide process stability. Attached Figure Description
[0024] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0025] Figure 1 This is a schematic diagram of the structure of the battery cover assembly provided in an embodiment of this application;
[0026] Figure 2 This is another structural schematic diagram of the battery cover assembly provided in an embodiment of this application;
[0027] Figure 3 for Figure 2 A sectional view along section AA;
[0028] Figure 4 A partial structural schematic diagram of the battery cover assembly provided in an embodiment of this application;
[0029] Figure 5 This is another partial structural schematic diagram of the battery cover assembly provided in an embodiment of this application;
[0030] Figure 6 for Figure 5 A sectional view along section BB;
[0031] Figure 7 for Figure 5 A sectional view along section CC;
[0032] Figure 8 for Figure 5 A sectional view along section DD;
[0033] Figure 9 This is a schematic diagram of the structure of the second insulating element provided in an embodiment of this application;
[0034] Figure 10 for Figure 9 A sectional view along section EE;
[0035] Figure 11 for Figure 9 A sectional view along section FF;
[0036] Figure 12 This is another structural schematic diagram of the second insulating member provided in an embodiment of this application;
[0037] Figure 13 for Figure 12 A partially enlarged structural diagram;
[0038] Figure 14 Another structural schematic diagram of the second insulating member provided in the embodiments of this application;
[0039] Figure 15 This is a schematic diagram of the battery structure provided in an embodiment of this application;
[0040] Figure 16 This is another structural schematic diagram of the battery provided in an embodiment of this application;
[0041] Figure 17 for Figure 16 A cross-sectional view along section GG;
[0042] Figure 18 This is a diagram showing the assembly sequence of the battery provided in an embodiment of this application.
[0043] Figure label:
[0044] 1-Cover plate, 11-Third clearance notch, 2-First insulating component, 21-Slot, 3-Second insulating component, 31-Second clearance notch, 32-Snap-on part, 33-Positioning protrusion, 34-Head, 35-Protective rib, 36-Sunk platform, 4-Connecting piece, 41-First piece, 42-Second piece, 5-Terminal post, 51-Aluminum block, 52-Copper block, 53-Protrusion, 6-Sealing plate, 61-Injection hole, 7-Explosion-proof valve, 8-Third insulating component, 9-Sealing ring, 100-Battery cover plate assembly, 200-Housing shell, 300-Pole group, a1-First preset direction, b1-Second preset direction. Detailed Implementation
[0045] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.
[0046] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.
[0047] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0048] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. 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. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0049] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0050] The following reference Figures 1 to 18 This application describes a battery cover assembly and a battery according to some embodiments.
[0051] Example 1
[0052] See Figures 1 to 18 As shown, an embodiment of this application provides a battery cover assembly 100, including: a cover plate 1, a first insulating member 2, a second insulating member 3, a connecting piece 4, a terminal post 5, and a sealing plate 6; wherein, the first insulating member 2 is disposed on one side of the cover plate 1 along a first preset direction a1, and an installation cavity is formed between the first insulating member 2 and the cover plate 1, the second insulating member 3 and the connecting piece 4 are both disposed in the installation cavity, and the second insulating member 3 is disposed between the connecting piece 4 and the cover plate 1;
[0053] The pole post 5 is disposed on the cover plate 1 and connected to the connecting piece 4; the first insulating member 2 forms a first clearance notch, and the second insulating member 3 forms a second clearance notch 31, and both are used as lead-out channels for the pole tabs of the pole assembly 300; the cover plate 1 forms a third clearance notch 11, and the sealing plate 6 is installed in the third clearance notch 11 and is used to cover the pole tabs; the first insulating member 2 forms a snap-fit part 32, and the second insulating member 3 forms a snap-fit groove 21, and the snap-fit part 32 snaps into the snap-fit groove 21, which makes assembly easier. This will be used as an example for explanation later. Of course, it is not limited to this. The first insulating member 2 can also form a snap-fit groove 21, and the second insulating member 3 can form a snap-fit part 32, depending on the actual needs of the design.
[0054] As can be seen from the structure described above, the embodiments of this application provide a battery cover assembly 100 that can be applied to a battery. The tabs of the battery electrode group 300 are first pre-welded vertically, then pass through the clearance notches on the two insulating parts below the cover plate 1, bend 90° by tooling, and are located above the connecting piece 4, and connected to the connecting piece 4, for example, by welding, and then assembled with the housing 200. At the same time, the housing 200 is connected to the periphery of the cover plate 1, for example by welding, and finally the sealing plate 6 is assembled, for example, it can be welded to the cover plate 1, and finally the sealing is completed.
[0055] As can be seen, this application provides an integrated structure of cover plate 1 and connecting piece 4, which reduces the welding process between connecting piece 4 and electrode post 5 and the bending process of connecting piece 4, greatly improving the space utilization rate inside the battery. Furthermore, an insulating protective component, namely the first insulating component 2, is provided on the bottom side of cover plate 1 to prevent the electrode assembly 300 from being damaged during welding of connecting piece 4, thus providing process stability. In addition, the connecting piece 4 is directly connected to electrode post 5, and as part of the structure of cover plate 1, it shortens the current flow path and reduces the internal resistance of the battery.
[0056] In addition, one of the first insulating member 2 and the second insulating member 3 is provided with a snap-fit portion 32, and the other is provided with a slot 21. The snap-fit portion 32 is engaged in the slot 21, which makes the two parts more secure and stable, thereby improving the safety and reliability of the battery.
[0057] Furthermore, preferably, the first preset direction a1, the thickness direction of the cover plate 1, and the height direction of the pole group 300 are all the same. Of course, it is not limited to this, and the first preset direction a1 can also be designed according to actual needs.
[0058] In this embodiment, preferably, as follows: Figure 7 and Figure 13 As shown, the latching part 32 is arranged in a ring along the circumferential edge of the second insulating member 3, and the latching groove 21 is an annular groove corresponding to the latching part 32, which increases the area of the mating area and improves the stability after assembly. Moreover, the latching part 32 and the latching groove 21 are located at the edge, which helps to avoid other structures.
[0059] Of course, it is not limited to the above. For example, the buckle part 32 can also adopt a non-circular structure. The buckle part 32 is a small block and its position can be distributed arbitrarily. Correspondingly, the slot 21 is also a non-circular structure, which is a number of independent small grooves. Of course, it is not limited to this and can also be designed according to actual needs.
[0060] In this embodiment, preferably, as follows: Figure 7 , Figure 8 , Figure 12 and Figure 13As shown, one of the first insulating member 2 and the second insulating member 3 has a positioning protrusion 33, and the other has a positioning hole. The positioning protrusion 33 is inserted into the positioning hole and connected by heat fusion. Of course, it is not limited to this, the two can also be connected by welding.
[0061] As can be seen from the structure described above, the precise positioning of the first insulating component 2 and the second insulating component 3 is achieved through the cooperation of the positioning protrusion 33 and the positioning hole, and through heat fusion connection, thereby improving the assembly accuracy and the convenience of assembly.
[0062] Furthermore, preferably, after the hot-melt connection, the end of the positioning protrusion 33 forms a head 34, and a groove connected to and communicating with it is formed on the outer periphery of the positioning hole. The head 34 abuts against the bottom wall of the groove and plays a limiting role.
[0063] In this embodiment, preferably, as follows: Figure 6 and Figure 8 As shown, the second insulating member 3 is formed with a protective rib 35 arranged circumferentially along the second clearance notch 31, and the protective rib 35 extends into the third clearance notch 11 to separate the side wall of the third clearance notch 11 from the connecting piece 4.
[0064] As can be seen from the structure described above, the protective rib 35 can separate the side wall of the third clearance notch 11 from the connecting piece 4, thereby effectively preventing the metal wires generated during the manufacturing process of the metal cover plate 1 from short-circuiting with the connecting piece 4 and affecting product performance, which helps to improve the yield rate.
[0065] Furthermore, preferably, the first preset direction a1, the thickness direction of the cover plate 1, and the height direction of the pole group 300 are all the same. Of course, it is not limited to this, and the first preset direction a1 can also be designed according to actual needs.
[0066] Furthermore, preferably, the protective rib 35 is a ring structure, which has a large protective area and good protective effect. Of course, it is not limited to this. The protective rib 35 can also be a semi-ring structure, or the protective rib 35 can be a multi-segment independent fan-shaped structure, and is arranged sequentially at intervals along the circumference of the third clearance gap 11, etc., depending on the actual needs of the design.
[0067] Furthermore, preferably, the side wall of the third clearance notch 11 is provided with a stepped groove that communicates with it, and the sealing plate 6 is installed in the third clearance notch 11 and sits on the platform of the stepped groove. Along the first preset direction a1, the end of the protective rib 35 does not protrude from the bottom wall of the stepped groove and is flush with it. This can effectively avoid interference between the protective rib 35 and the cover plate 1 and affect the assembly.
[0068] Furthermore, preferably, the protective rib 35 is a ring structure, which provides a large protective area and good protective effect. Of course, it is not limited to this. The protective rib 35 can also be a semi-ring structure, or the protective rib 35 can be a multi-segment independent fan-shaped structure, and can be arranged sequentially at intervals along the circumference of the third clearance gap 11, etc., depending on the actual needs of the design.
[0069] In this embodiment, preferably, as follows: Figure 8 As shown, the second insulating member 3 has a recessed platform 36 arranged along the outer periphery of the protective rib 35, and the opening of the recessed platform 36 is arranged facing the cover plate 1, so that the part of the structure of the second insulating member 3 near the third clearance notch 11 is separated from the cover plate 1.
[0070] As can be seen from the structure described above, a recessed platform 36 is provided on the outer periphery of the protective rib 35, thereby separating the area near the protective rib 35 from the cover plate 1, which can effectively prevent the second insulating component 3, such as the following plastic, from melting during the sealing welding of the sealing plate 6 and the cover plate 1.
[0071] In this embodiment, preferably, as follows: Figure 8 As shown, along the first preset direction a1, the depth of the sinking platform 36 is h, and 0.25mm≤h≤1.2mm.
[0072] Based on the structure described above, if the depth h of the recessed platform 36 is too small, it will provide good isolation, but the protective ribs 35 and other structures will still be affected by welding heat; if the depth h of the recessed platform 36 is too large, the strength of the area around the protective ribs 35 will be low, making it prone to breakage.
[0073] In this embodiment, preferably, as follows: Figure 8 As shown, along the second preset direction b1, the width of the recessed platform 36 is a, and 0.25mm≤a≤1.2mm.
[0074] Based on the structure described above, if the width 'a' of the countersunk platform 36 is too small, it provides good isolation, but the protective ribs 35 and other structures will still be affected by welding heat. If the width 'a' of the countersunk platform 36 is too large, the strength of the area around the protective ribs 35 will be weak, making it prone to breakage. Of course, this is not the only possibility; the value of 'a' is not limited to the range described above. 'a' can be set to < 0.25 mm or > 0.25 mm, depending on the specific needs.
[0075] Furthermore, preferably, the sinking platform 36 is a ring structure. Of course, it is not limited to this; it can also be part of a ring structure, etc., depending on the actual needs.
[0076] Furthermore, preferably, the second preset direction b1, the width direction of the cover plate 1, the width direction of the first insulating member 2, and the width direction of the second insulating member 3 are all the same.
[0077] In this embodiment, preferably, as follows: Figure 7 As shown, along the first preset direction a1, a protrusion 53 is formed on the side of the pole post 5 near the pole group 300, so that a clearance groove is formed on the side of the pole post 5, and a part of the structure of the connecting piece 4 extends into the clearance groove and is connected to the inner wall of the clearance groove.
[0078] As described above, the pole post 5 is designed as an inverted convex shape. This results in the aforementioned clearance grooves forming on both sides of the pole post 5 near its bottom. This allows a portion of the connecting piece 4 to be installed within these grooves, increasing the contact area between the connecting piece 4 and the grooves, thus making the assembly of the connecting piece 4 and the pole post 5 more stable. However, this is not the only option; the protrusion 53 may not be provided at the bottom of the pole post 5, and the connecting piece 4 may connect directly to the side wall or bottom wall of the pole post 5, depending on the specific needs.
[0079] In this embodiment, preferably, as follows: Figure 7 As shown, the connecting piece 4 is connected to the side wall of the avoidance groove along the first preset direction a1 by welding.
[0080] As can be seen from the structure described above, welding is performed at the gap where the connecting piece 4 mates with the side wall of the clearance groove, thereby fixing the cover plate 1, the second insulating component 3, the third insulating component 8 (described below), and the sealing ring 9 together. This results in a more stable and reliable structure, and welding at the aforementioned location makes operation easier.
[0081] It should be noted that the welding position of the connecting piece 4 and the relief groove is not limited to the above. The connecting piece 4 and the bottom wall of the relief groove perpendicular to the first preset direction a1 can also be welded together by penetration welding, or welded at both of the above welding positions at the same time, depending on the actual needs.
[0082] In this embodiment, preferably, as follows: Figure 15 and Figure 12 As shown, the battery cover assembly 100 also includes an explosion-proof valve 7. The sealing plate 6 has a second mounting through hole extending along a first preset direction a1, and the explosion-proof valve 7 is installed in the second mounting through hole. Along the first preset direction a1, the first insulating member 2 has a first pressure relief through hole, and the first pressure relief through hole can be connected to the explosion-proof valve 7 via a second clearance notch 31.
[0083] As can be seen from the structure described above, when thermal runaway occurs inside the battery, the first pressure relief hole and the second clearance notch 31 can serve as pressure relief channels, and the explosion-proof valve 7 will eventually open to relieve pressure, ensuring the safety and reliability of the battery.
[0084] In this embodiment, preferably, as follows: Figure 12and Figure 15 As shown, along the first preset direction a1, the sealing plate 6 has an injection hole 61, and the first insulating member 2 has a first injection clearance notch. The first injection clearance notch, the second clearance notch 31 and the injection hole 61 are connected in sequence.
[0085] As can be seen from the structure described above, by making full use of the space on the sealing plate 6, an injection hole 61 is opened on it to facilitate the injection of liquid into the battery. Furthermore, a first injection clearance notch is opened on the first insulating member 2, and a second clearance notch 31 is opened on the second insulating member 3 as an injection channel to speed up the injection speed and improve the efficiency of battery manufacturing.
[0086] In this embodiment, preferably, as follows: Figure 6 and Figure 7 As shown, the cover plate 1 has a first mounting through hole extending along a first preset direction a1, and the pole post 5 is installed in the first mounting through hole; the battery cover plate assembly 100 also includes a third insulating member 8, which is disposed on the side of the cover plate 1 away from the pole group 300, and the third insulating member 8 is disposed between the pole post 5 and the cover plate 1.
[0087] As can be seen from the structure described above, the pole post 5 is installed in the first mounting through hole of the cover plate 1, which makes the pole post 5 and the cover plate 1 more stable and firm. Furthermore, the use of a third insulating component 8, such as plastic, for insulation protection avoids problems such as short circuits, making it safer and more reliable.
[0088] In this embodiment, preferably, as follows: Figure 6 and Figure 7 As shown, the battery cover assembly 100 also includes a sealing ring 9, which is disposed in the first mounting through hole and extends to the inner side of the cover plate 1 and is located in the third mounting through hole formed by the second insulating member 3. The sealing ring 9 is pressed by the cover plate 1, the pole post 5, the connecting piece 4 and the second insulating member 3, and the sealing ring 9 plays a sealing role.
[0089] In this embodiment, preferably, as follows: Figure 6 As shown, a stepped groove is provided on the outer periphery of the third clearance notch 11 and is connected thereto, and the sealing plate 6 is installed in the stepped groove.
[0090] As can be seen from the structure described above, the stepped groove serves to stabilize and support the sealing plate 6, preventing it from directly pressing on the electrode lug and connecting piece 4, thus protecting the electrode lug and connecting piece 4. Of course, it is not limited to this; the stepped groove may not be provided, depending on the actual needs.
[0091] In this embodiment, preferably, as follows: Figures 1 to 3 As shown, the first insulating element 2 is connected to the cover plate 1 by welding.
[0092] As can be seen from the structure described above, the first insulating component 2 and the cover plate 1 can be welded together, and the connection is firm and stable, and the operation is simple and convenient.
[0093] Furthermore, preferably, the first insulating element 2 is connected to the cover plate 1 by welding methods such as laser or ultrasonic welding, but of course, it is not limited to this.
[0094] It should be noted that the first insulating component 2 and the cover plate 1 are not limited to being connected by welding. They can also be connected by other methods, depending on the actual needs of the design.
[0095] In this embodiment, preferably, as follows: Figure 15 As shown, the sealing plate 6 and the cover plate 1 are connected by welding to improve the stability and firmness after assembly.
[0096] In this embodiment, preferably, as follows: Figure 3 As shown, the connecting piece 4 is a U-shaped sheet structure, comprising a first piece 41 and a second piece 42 connected to each other. The first piece 41 has a through hole for clearance and is fitted around the periphery of the pole post 5. The tabs of the pole assembly 300 are located on the upper surface of the second piece 42, so that when it is bent at 90°, it can fit against the upper surface of the second piece 42. Along the first preset direction a1, the first piece 41 has a multi-step structure, which facilitates the support of structures at different heights. For example, the sealing ring 9 and the second insulating member 3 can sit on the step surfaces at different heights. Of course, the structure of the connecting piece 4 is not limited to this and can be selected according to actual needs.
[0097] In this embodiment, preferably, as follows: Figure 3 As shown, the first insulating member 2 is a rectangular plate with a groove that opens towards the cover plate 1. The groove and the cover plate 1 together form the aforementioned mounting cavity. Of course, the structure of the first insulating member 2 is not limited to this and can be designed according to actual needs.
[0098] In this embodiment, preferably, as follows: Figure 15 As shown, both the sealing plate 6 and the cover plate 1 are rectangular, and the length and width of the sealing plate 6 and the cover plate 1 are the same, resulting in a reasonable layout that makes full use of space and enhances the aesthetics. Of course, the shape of the sealing plate 6 is not limited to this; it can be selected according to actual needs, such as using other polygonal or circular shapes.
[0099] In this embodiment, preferably, the sealing plate 6 is made of an insulating material, such as PP. Of course, it is not limited to this. The sealing plate 6 can also be made of other insulating materials, or an insulating layer can be provided on the side of the sealing plate 6 near the connecting piece 4, etc.
[0100] In this embodiment, preferably, as follows: Figure 15As shown, there are two poles 5, one of which is a positive pole 5 and the other is a negative pole 5. Each pole group 300 has a positive tab and a negative tab, and a connecting piece 4 is provided between the positive pole 5 and the positive tab, and between the negative pole 5 and the negative tab. Of course, the number of poles 5 is not limited to this. The number of poles 5 can also be one. That is to say, only one pole 5 is provided on the cover plate 1. This pole 5 can be a positive pole 5 or a negative pole 5.
[0101] In this embodiment, preferably, as follows: Figure 17 As shown, there are two pole groups 300, which are arranged symmetrically and in parallel. The positive tabs of the two pole groups 300 share a connecting piece 4, and the negative tabs of the two pole groups 300 share a connecting piece 4.
[0102] In this embodiment, preferably, the second insulating member 3 is a plastic member, that is, the lower plastic. Of course, its material is not limited to this and can be designed according to actual needs.
[0103] In this embodiment, preferably, as follows: Figure 7 As shown, when the terminal 5 is the negative terminal 5, it is a composite structure made of aluminum block 51 and copper block 52. When the terminal 5 is the positive terminal 5, it is entirely made of aluminum block 51.
[0104] Example 2
[0105] See Figures 15 to 18 As shown, Embodiment 2 of this application also provides a battery, including the battery cover assembly 100 described in Embodiment 1 above. Therefore, it has all the beneficial technical effects of the battery cover assembly 100. The same technical features and beneficial effects will not be repeated here.
[0106] In this embodiment, preferably, as follows: Figures 15 to 18 As shown, the battery also includes a housing 200 and an electrode assembly 300; wherein the electrode assembly 300 is installed inside the housing 200, and the battery cover assembly 100 is installed at the open end of the housing 200.
[0107] The tabs of the electrode assembly 300 pass through the first clearance notch of the first insulating member 2 and the second clearance notch 31 of the second insulating member 3 in sequence, extending into the third clearance notch 11 of the cover plate 1, and are welded together with the connecting piece 4 after being bent; the sealing plate 6 is installed in the second clearance notch and covers the tabs.
[0108] As can be seen from the structure described above, during the assembly process of the battery provided in this application, the tabs of the battery electrode group 300 are first pre-welded vertically, then pass through the clearance notches on the two insulating parts below the cover plate 1, bend 90° by tooling, and are located above the connecting piece 4, and connected to the connecting piece 4, for example, by welding, and then assembled with the housing 200. At the same time, the housing 200 is connected to the periphery of the cover plate 1, for example by welding, and finally the sealing plate 6 is assembled, for example, it can be welded to the cover plate 1, and finally the sealing is completed.
[0109] As can be seen from the above, this application provides an integrated structure of cover plate 1 and connecting piece 4, which reduces the welding process between connecting piece 4 and electrode post 5 and the bending process of connecting piece 4, greatly improving the space utilization rate inside the battery. Furthermore, an insulating protective component, namely the first insulating component 2, is provided on the bottom side of cover plate 1 to prevent the electrode assembly 300 from being damaged during welding of connecting piece 4, thus providing process stability.
[0110] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. A battery cover assembly, characterized in that, include: The package includes a cover plate, a first insulating component, a second insulating component, a connecting piece, a pole post, and a sealing plate; wherein the first insulating component is disposed on one side of the cover plate along a first preset direction, and an installation cavity is formed between the first insulating component and the cover plate; the second insulating component and the connecting piece are both disposed within the installation cavity, and the second insulating component is disposed between the connecting piece and the cover plate. The pole post is disposed on the cover plate and connected to the connecting piece; the first insulating member has a first clearance notch, the second insulating member has a second clearance notch, and both are used as lead-out channels for the electrode tabs of the electrode assembly; the cover plate has a third clearance notch, the sealing plate is installed in the third clearance notch, and is used to cover the electrode tabs; one of the first insulating member and the second insulating member has a snap-fit part, and the other has a slot, and the snap-fit part is snapped into the slot.
2. The battery cover assembly according to claim 1, characterized in that, The latching portion is arranged in a ring along the circumferential edge of the first insulating member or the second insulating member, and the latching groove is an annular groove corresponding to the latching portion; and / or One of the first insulating member and the second insulating member has a positioning protrusion, and the other has a positioning hole. The positioning protrusion is inserted into the positioning hole and connected by heat fusion or welding.
3. The battery cover assembly according to claim 1, characterized in that, The second insulating member is formed with a protective rib arranged circumferentially along the second clearance notch, and the protective rib extends into the third clearance notch to space the sidewall of the third clearance notch from the connecting piece.
4. The battery cover assembly according to claim 3, characterized in that, The second insulating member has a recessed platform disposed along the outer periphery of the protective rib, and the opening of the recessed platform is disposed facing the cover plate, so that the portion of the structure of the second insulating member near the third clearance notch is separated from the cover plate.
5. The battery cover assembly according to claim 4, characterized in that, Along the first preset direction, the depth of the sinking platform is h, and 0.25mm≤h≤1.2mm; Along the second preset direction, the width of the sinking platform is a, and 0.25mm≤a≤1.2mm.
6. The battery cover assembly according to claim 1, characterized in that, Along the first preset direction, a protrusion is formed on the side of the pole near the pole group, so that a clearance groove is formed on the side of the pole. Part of the structure of the connecting piece extends into the clearance groove, and the connecting piece is connected to the side wall of the clearance groove along the first preset direction by welding.
7. The battery cover assembly according to claim 1, characterized in that, The battery cover assembly further includes an explosion-proof valve; the sealing plate has a second mounting through hole extending along the first preset direction, and the explosion-proof valve is installed within the second mounting through hole; along the first preset direction, the first insulating member has a first pressure relief through hole, and the first pressure relief through hole can communicate with the explosion-proof valve via the second clearance notch; and / or Along the first preset direction, the cover plate is formed with an injection hole, the first insulating member is formed with a first injection clearance notch, and the first injection clearance notch, the second clearance notch and the injection hole are sequentially connected.
8. The battery cover assembly according to claim 1, characterized in that, The cover plate has a first mounting through hole extending along a first preset direction, and the electrode post is installed in the first mounting through hole; the battery cover plate assembly further includes a third insulating member, the third insulating member is disposed on the side of the cover plate opposite to the electrode assembly, and the third insulating member is disposed between the electrode post and the cover plate; The battery cover assembly also includes a sealing ring disposed in the first mounting through hole, with the end of the sealing ring extending to the inner side of the cover and located in the third mounting through hole formed by the second insulating member. The sealing ring is pressed together by the cover, the terminal post, the connecting piece, and the second insulating member.
9. The battery cover assembly according to any one of claims 1 to 8, characterized in that, The first insulating element is connected to the cover plate by welding; and / or The sealing plate and the cover plate are connected by welding; and / or The sealing plate is made of insulating material.
10. A battery, characterized in that, The device includes a housing, an electrode assembly, and a battery cover assembly as described in any one of claims 1 to 9; wherein the electrode assembly is installed inside the housing, and the battery cover assembly is installed at the open end of the housing; The electrode lugs of the electrode assembly extend sequentially through the first clearance notch of the first insulating member and the second clearance notch of the second insulating member into the third clearance notch of the cover plate, and the electrode lugs are bent and welded together with the connecting piece; the sealing plate is installed in the second clearance notch and covers the electrode lugs.