Cover plate assembly and battery

Abstract

The utility model relates to the technical field of batteries, in particular to a cover plate assembly and a battery, the cover plate assembly comprises a cover plate and a pole, the pole is embedded in the cover plate, and the two ends of the pole respectively extend to the inner side and the outer side of the cover plate along the thickness direction; and the pole is of a flat plate-shaped structure. Therefore, a conventional metal cover plate is changed into the plastic cover plate, and the pole is embedded in the cover plate, so that an insulation structure does not need to be designed, the pole is designed into a flat plate-shaped structure, and the two ends of the pole respectively extend to the inner side and the outer side of the outer cover; one part of the pole columns on the inner side of the cover plate can be used as inner connecting pieces for electric connection with the battery cell tabs, and the other part of the pole columns on the outer side of the cover plate can be used as outer connecting pieces for electric connection between a battery pack or a battery pack, so that parts are reduced, the structure of the battery cover plate is simpler, the production cost is greatly reduced, and the production efficiency is improved. The production process is reduced, the production efficiency is improved, and the yield is increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a cover plate assembly and battery. BACKGROUND

[0002] At present, square aluminum shell batteries, cylindrical batteries, single plastic shell batteries and the like all adopt metal cover plates, and an insulating structure, such as upper and lower plastic, needs to be designed between the metal cover plate and the metal pole, and the pole of the above-mentioned batteries is in a cylindrical structure. When the pole of this kind of structure is connected with the tab of the battery cell, a copper or aluminum metal sheet (referred to as an internal lead-out sheet, i.e., an internal connecting sheet) needs to be welded, which involves many structural parts, complex structure, many pre-manufacturing and post-installation processes, high material cost, many variation points in production, and low yield rate in the production process, and high total cost. CONTENT OF THE UTILITY MODEL

[0003] The present application aims to provide a cover plate assembly and battery, which solves the technical problems of many structural parts, complex structure, many manufacturing and installation processes, high material cost, many variation points in production, and low yield rate in the prior art.

[0004] The present application provides a cover plate assembly, comprising: a cover plate and a pole; wherein the pole is embedded in the cover plate, and both ends of the pole extend to the inner side and the outer side of the cover plate along the thickness direction thereof; and the pole is in a flat plate structure.

[0005] In the above technical solution, further, the pole is in an L-shaped plate structure.

[0006] In any of the above technical solutions, further, the pole is in a square plate structure.

[0007] In any of the above technical solutions, further, the cover plate assembly further comprises a sealing ring, the sealing ring is sleeved on the outside of the pole and embedded in the cover plate; and the sealing ring, the pole and the cover plate are integrally injection molded.

[0008] In any of the above technical solutions, further, both sides of the pole along the thickness direction thereof are provided with plastic bodies, and the plastic bodies are sealed and bonded together with the pole and are thermally fused together with the cover plate.

[0009] In any of the above technical solutions, further, the cover plate assembly further comprises an explosion-proof valve, the cover plate is formed with a mounting groove and an exhaust through hole arranged in sequence along the thickness direction thereof, and the explosion-proof valve is mounted in the mounting groove.

[0010] In any of the above technical solutions, further, the cover plate assembly further comprises an explosion-proof valve, which is integrally injection molded with the cover plate.

[0011] In any of the above technical solutions, further, the cover plate is formed with a liquid injection hole.

[0012] In any of the above technical solutions, further, the thickness of the pole column is 0.5-5mm.

[0013] In any of the above technical solutions, further, the number of the pole columns is two, and one of them is a positive pole column, and the other is a negative pole column.

[0014] The material of the positive pole column is aluminum, and the material of the negative pole column is copper-aluminum composite material.

[0015] The application also provides a battery comprising a shell, a battery cell and the cover plate assembly of any of the above technical solutions, wherein the battery cell is installed in the shell; at least one end of the shell in the height direction thereof is formed with an opening, the cover plate assembly is installed at the opening, and the pole column of the cover plate assembly is connected to the pole lug of the battery cell by welding. Thus, the cover plate assembly has all the beneficial technical effects, which will not be described here.

[0016] Compared with the prior art, the application has the following beneficial effects:

[0017] The cover plate assembly provided by the application changes the previous metal cover plate to a plastic cover plate, and the pole column is embedded in the cover plate, so that there is no need to design an insulation structure between the two, and the pole column is designed as a flat plate structure, and the two ends of the pole column extend to the inner side and the outer side of the outer cover respectively, a part of the pole column on the inner side of the cover plate can be used as an inner connecting piece for electrical connection between the pole lug and the battery cell, and another part of the pole column on the outer side of the cover plate can be used as an outer connecting piece for electrical connection between the battery pack or the battery pack, reducing the number of parts, making the structure of the battery cover plate simpler, greatly reducing the production cost, reducing the production process, improving the production efficiency, and increasing the yield. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0019] Figure 1 The structure diagram of the cover plate assembly provided by Embodiment One of the application;

[0020] Figure 2 An assembly view of the cover plate assembly and the battery cell provided in Embodiment One of the present application;

[0021] Figure 3 Another assembly view of the cover plate assembly and the battery cell provided in Embodiment One of the present application;

[0022] Figure 4 A structural schematic view of the cover plate assembly provided in Embodiment Two of the present application;

[0023] Figure 5 Another structural schematic view of the cover plate assembly provided in Embodiment Two of the present application;

[0024] Figure 6 A structural schematic view of the battery containing the cover plate assembly described in Embodiment Two provided in Embodiment Four of the present application;

[0025] Figure 7 A structural schematic view of the cover plate assembly provided in Embodiment Three of the present application;

[0026] Figure 8 Another structural schematic view of the cover plate assembly provided in Embodiment Three of the present application;

[0027] Figure 9 A structural schematic view of the battery containing the cover plate assembly described in Embodiment Three provided in Embodiment Four of the present application.

[0028] Reference signs:

[0029] 1 - cover plate, 11 - mounting groove, 12 - exhaust through hole, 13 - liquid injection hole, 2 - pole, 3 - sealing ring, 4 - plastic body, 5 - explosion-proof valve, 6 - battery cell, 61 - tab, 7 - shell. DETAILED DESCRIPTION

[0030] The technical solutions of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0031] The components of the embodiments of the present application generally described and shown in the accompanying drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application.

[0032] Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.

[0033] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] The following refers to Figures 1 to 9 The cover plate assembly and the battery according to some embodiments of the present application are described.

[0036] Embodiment one

[0037] Referring to Figures 1 to 3 As shown in the drawings, the embodiments of the present application provide a cover plate assembly, comprising: a cover plate 1 and a pole 2; wherein the pole 2 is embedded in the cover plate 1, and the two ends of the pole 2 respectively extend to the inner side and the outer side of the cover plate 1 along the thickness direction thereof; the pole 2 is a flat plate structure.

[0038] Based on the structure described above, the previous metal cover plate is changed to a plastic cover plate, the pole 2 is embedded in the cover plate 1, so there is no need to design the insulation structure between the two, and the pole 2 is designed as a flat plate structure, and the two ends of the pole 2 respectively extend to the inner side and the outer side of the outer cover, a part of the pole on the inner side of the cover plate 1 can be used as an inner connecting piece for electrical connection between the pole tab 61 of the battery cell 6, and another part of the pole on the outer side of the cover plate 1 can be used as an outer connecting piece for electrical connection between the battery pack or battery pack, reducing the number of parts, making the structure of the battery cover plate 1 more simple, greatly reducing the production cost, reducing the production process, improving the production efficiency, and increasing the yield.

[0039] In this embodiment, preferably, as Figures 1 to 3 As shown in the drawings, the pole 2 is a square plate structure.

[0040] According to the structure described above, the structure of the pole column 2 with the above shape is simple, convenient to manufacture, and the one-word-shaped plate-shaped pole column 2 on the inner side of the cover plate 1 can be directly attached to the tab 61 of the battery cell 6 and welded to realize electrical connection. Preferably, the welding method can be one or more of ultrasonic welding, laser welding, and resistance welding between metals. The pole column 2 on the outer side of the cover plate 1 can be used as a connecting sheet for electrical connection between battery packs or battery packs, realizing electrical connection between battery packs or battery packs. The connection method can be one or more of ultrasonic welding, laser welding, and resistance welding between metals.

[0041] In this embodiment, as shown in Figure 3 Preferably, the cover plate assembly further includes a sealing ring 3, which is sleeved on the outside of the pole column 2 and embedded in the cover plate 1; the sealing ring 3, the pole column 2, and the cover plate 1 are integrally injection molded.

[0042] According to the structure described above, the sealing ring 3 and the pole column 2 are assembled and fixed together, and then assembled in the injection mold of the cover plate 1, while the compression amount of the sealing ring 3 is kept between 10% and 50%, preferably 20% to 40% compression amount, and finally integrally injection molded, which is simple in structure and good in sealing effect.

[0043] Further, preferably, the material of the sealing ring 3 can be PP, PFA, or other organic polymer materials, or EPDM, FKM, or other rubber materials, and if necessary, sealing oil can be sprayed on the surface of the sealing ring 3 to increase the sealing property of the sealing surface.

[0044] In this embodiment, as shown in Figure 1 Preferably, the cover plate assembly further includes an explosion-proof valve 5, and the cover plate 1 is formed with a mounting groove 11 and an exhaust through hole 12 arranged in sequence along the thickness direction thereof, and the explosion-proof valve 5 is mounted in the mounting groove 11.

[0045] According to the structure described above, when the cover plate 1 is injection molded, the explosion-proof valve 5 can be installed in the mounting groove 11 of the cover plate 1, and preferably, the explosion-proof valve 5 is a one-way exhaust structure.

[0046] It should be noted that the assembly structure of the explosion-proof valve 5 and the cover plate 1 is not limited to this, and the explosion-proof valve 5 and the cover plate 1 can also be integrally injection molded, that is, the explosion-proof valve 5 can be assembled in the injection mold of the cover plate 1, and finally injection molded into an integrated cover plate 1.

[0047] In this embodiment, as shown in Figure 1 Preferably, the cover plate 1 is formed with a liquid injection hole 13 for injecting liquid into the inside of the battery.

[0048] Further, preferably, the liquid injection hole 13 is also provided with a sealing pin or a sealing plug, etc.

[0049] In this embodiment, preferably, the thickness of the pole 2 is 0.5-5mm, and preferably 0.5-2mm. Of course, it is not limited thereto, and can be selected according to actual needs.

[0050] In this embodiment, preferably, as shown in Figure 1 , the number of the pole 2 is two, and one of which is the positive pole 2, and the other of which is the negative pole 2.

[0051] The material of the positive pole 2 is aluminum; and the material of the negative pole 2 is copper-aluminum composite material.

[0052] Embodiment Two

[0053] Referring to Figures 4 to 6 , the cover plate assembly in this embodiment is an improvement based on embodiment one, and the technical content disclosed in embodiment one is not repeated, and the content disclosed in embodiment one also belongs to the content disclosed in this embodiment.

[0054] In this embodiment, preferably, as shown in Figure 4 and Figure 5 , the pole 2 is a plate structure in L shape.

[0055] According to the structure described above, the L-shaped pole 2 includes a vertical plate and a horizontal plate connected perpendicularly, the vertical plate is inserted into the cover plate 1, and the horizontal plate extends in a direction parallel to the cover plate 1, especially when the pole 2 with the above structure is used as the structure of the electrical connection between the external battery pack or battery pack, as shown in Figure 6 , the horizontal plates of the positive and negative poles are attached together up and down, and can be connected by welding, threaded connection or riveting, etc., compared with the traditional battery structure, it is simple and convenient, easy to process and manufacture, greatly reduces the material cost and manufacturing cost, and also meets the demand of electrical lead-out.

[0056] Embodiment Three

[0057] Referring to Figures 7 to 9 , the cover plate assembly in this embodiment is an improvement based on embodiment one, and the technical content disclosed in embodiment one is not repeated, and the content disclosed in embodiment one also belongs to the content disclosed in this embodiment.

[0058] In this embodiment, preferably, as shown in Figures 7 to 9 , the cover plate assembly in this embodiment removes the structure of the sealing ring 3, and adopts the following structure: the both sides of the pole 2 along the thickness direction are provided with plastic bodies 4, and the plastic bodies 4 and the pole 2 are sealingly bonded together, and the integrated body is connected with the cover plate 1 by hot melting.

[0059] According to the structure described above, the plastic body 4 is tightly connected with the cover plate 1 and the pole 2, and better sealing effect can be achieved, so that the structure of the sealing ring 3 is not needed.

[0060] Further, preferably, the material of the plastic body 4 can be PP, PE, PET, PFA or other organic polymer materials.

[0061] Further, preferably, the plastic body 4 extends to the inner side and the outer side of the cover plate 1 along the thickness direction of the cover plate 1, so as to ensure the hot melting effect with the cover plate 1. Of course, the plastic body 4 can be flush with the cover plate 1, which can be selected according to actual needs.

[0062] It should be noted that the structure of the liquid injection hole 13 is removed in the embodiment, and the installation groove 11 and the exhaust through hole 12 are used as the liquid injection channel to inject liquid into the inside of the battery, which is simpler in structure. Of course, it is not limited to this, and the liquid injection hole 13 can be separately provided, which can be selected according to actual needs.

[0063] Embodiment Four

[0064] The embodiment four of the application also provides a battery comprising the cover plate assembly in any one of the embodiments one, two and three, so that the battery has all the beneficial technical effects of the cover plate assembly, and the same technical features and beneficial effects will not be described again.

[0065] In this embodiment, preferably, as shown in Figure 3 , Figure 6 and Figure 9 , the battery further comprises a shell 7 and a battery core 6; the battery core 6 is installed in the shell 7; at least one end of the shell 7 along the height direction of the shell 7 is formed with an opening, the cover plate assembly is installed at the opening, and the pole 2 of the cover plate assembly is connected with the tab 61 of the battery core 6 by welding.

[0066] According to the structure described above, the battery provided in the embodiment optimizes the cover plate structure, so that the structure is simpler, the cost is reduced, the assembly steps are reduced, the assembly efficiency is greatly improved, and the yield is improved.

[0067] It should be noted that: Figure 3 Fig. 4 shows an assembly view of the cover plate assembly and the battery core 6 according to the embodiment one; Figure 6 Fig. 5 shows a battery comprising the cover plate assembly according to the embodiment two; Figure 9 Fig. 6 shows a battery comprising the cover plate assembly according to the embodiment three.

[0068] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A cover plate assembly, characterized by The cover plate and the pole; wherein the pole is embedded in the cover plate, and the two ends of the pole extend to the inside and outside of the cover plate along the thickness direction thereof; the pole is a flat plate structure. The pole is an L-shaped plate structure.

2. The cover plate assembly of claim 1, wherein, The pole is a square plate structure.

3. The cover plate assembly of claim 1, wherein, The cover plate assembly further comprises a sealing ring, which is sleeved on the outside of the pole and embedded in the cover plate; the sealing ring, the pole and the cover plate are integrally injection molded.

4. The cover plate assembly of claim 1, wherein, The two sides of the pole along the thickness direction are provided with plastic bodies, and the plastic bodies are sealed and bonded with the pole, and are hot melted with the cover plate.

5. The cover plate assembly of claim 1, wherein, The cover plate assembly further comprises an explosion-proof valve, and the cover plate is formed with a mounting groove and an exhaust hole arranged in sequence along the thickness direction thereof, and the explosion-proof valve is mounted in the mounting groove.

6. The cover plate assembly of claim 1, wherein, The cover plate assembly further comprises an explosion-proof valve, and the explosion-proof valve is integrally injection molded with the cover plate.

7. The cover plate assembly of claim 1, wherein, The cover plate is formed with a liquid injection hole; and / or 8. The cover plate assembly of claim 6, wherein, The thickness of the pole is 0.5-5mm. The number of the poles is two, and one of them is a positive pole, and the other is a negative pole.

9. The cover plate assembly of any one of claims 1 to 8, wherein, The material of the positive pole is aluminum, and the material of the negative pole is copper-aluminum composite material. The cover plate assembly comprises a shell, an electric core and a cover plate assembly according to any one of claims 1 to 9; wherein the electric core is installed in the shell; at least one end of the shell along the height direction thereof is formed with an opening, the cover plate assembly is installed at the opening, and the pole of the cover plate assembly is connected with the tab of the electric core by welding.

10. A battery, characterized by ​

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