CN220627853U - Integrated structure of current collecting disc and pole and battery - Google Patents

Abstract

The application relates to the technical field of batteries, in particular to an integrated structure of a current collecting disc and a pole and a battery, comprising: a positive electrode current collecting disc, a positive electrode terminal and a liquid injection hole; the positive electrode terminal, the positive electrode current collecting disc and the liquid injection hole are of an integrated structure, and the liquid injection hole penetrates through the positive electrode terminal and the positive electrode current collecting disc along the height direction of the integrated structure. Therefore, the positive electrode current collecting disc, the positive electrode terminal and the liquid injection hole are designed into an integrated structure, so that the assembling process of the positive electrode current collecting disc and the post terminal is reduced, the assembling cost is saved, the integral strength is high, the damage is avoided, and in addition, the liquid injection hole penetrates through the positive electrode terminal and the positive electrode current collecting disc along the height direction of the integrated structure, so that the liquid injection requirement can be met.

Description

Integrated structure of current collecting disc and pole and battery

Technical Field

The application relates to the technical field of batteries, in particular to an integrated structure of a current collecting disc and a pole and a battery.

Background

The traditional battery comprises a shell, a winding core, an anode current collecting disc, an anode terminal and a cathode current collecting disc; the negative electrode current collecting disc is welded with the negative electrode tab of the winding core and the bottom of the shell respectively, the positive electrode current collecting disc is welded with the positive electrode tab of the winding core, and the positive electrode current collecting disc and the positive electrode terminal are usually riveted or welded together, but the fixture of the riveting process is complex in design, and poor welding is easy to generate during welding.

Disclosure of Invention

The utility model provides an aim at provides an integrative structure and battery of mass flow disk and utmost point post, has solved the anodal mass flow disk of traditional battery that exists among the prior art and has adopted riveting or welded connection together usually between the utmost point post to a certain extent, and the anchor clamps design of riveting technology is comparatively complicated, produces the technical problem of welding failure easily during the welding.

The application provides an integrated structure of current collecting tray and utmost point post, include: a positive electrode current collecting disc, a positive electrode terminal and a liquid injection hole; the positive electrode terminal, the positive electrode current collecting disc and the liquid injection hole are of an integrated structure, and the liquid injection hole penetrates through the positive electrode terminal and the positive electrode current collecting disc along the height direction of the integrated structure.

In the above technical solution, further, the positive electrode terminal is formed on the upper surface of the positive electrode current collecting disc and protrudes from the upper surface of the positive electrode current collecting disc.

In any of the above technical solutions, further, the center lines of the positive electrode terminal, the positive electrode current collecting plate, and the liquid injection hole extending in the height direction of the integrated structure are overlapped.

In any of the above technical solutions, further, along the height direction of the liquid injection hole, a liquid injection step is formed on an inner side wall of an upper portion of the liquid injection hole.

In any of the above technical solutions, further, the liquid injection step is a first-stage step.

In any of the above technical solutions, further, along the height direction of the liquid injection hole, a tapered liquid injection inclined plane is formed on an inner side wall of the liquid injection hole below the liquid injection step.

In any of the above technical solutions, further, the angle of the liquid injection inclined plane is 70 ° -80 °.

In any of the above technical solutions, further, the positive current collecting plate is in a flat plate shape.

In any of the above technical solutions, further, the positive current collecting plate is formed with a lightening hole.

In any of the above technical solutions, further, the thickness of the positive current collecting plate is 0.3mm-0.5mm.

The application also provides a battery, which comprises the integrated structure of the current collecting disc and the pole according to any one of the technical schemes, so that the battery has all the beneficial technical effects of the integrated structure of the current collecting disc and the pole, and the details are not repeated here.

In the above technical scheme, further, the battery further comprises a shell, an anode cover plate and a winding core; the coil core is arranged in the shell, and the positive electrode cover plate is covered at the top opening of the shell;

the positive electrode current collecting disc of the integrated structural member of the current collecting disc and the pole is connected with the positive electrode lug of the winding core, the positive electrode cover plate is provided with a through hole, and the positive electrode terminal of the integrated structural member of the current collecting disc and the pole penetrates through the through hole to extend to the outside of the positive electrode cover plate.

In any of the above technical solutions, further, the battery further includes an explosion-proof valve, and the explosion-proof valve is mounted on an upper portion of the liquid injection hole.

In any of the above technical solutions, further, the battery further includes a sealing ring, and the sealing ring is disposed between an inner sidewall of the housing and an edge of the positive electrode cover plate;

the inner wall of the shell is provided with a first groove part and a first bulge part, the sealing ring is provided with a second groove part and a second bulge part, the second bulge part is matched with the first groove part, and the first bulge part is matched with the second groove part; one side of the second bulge part, which is close to the positive electrode cover plate, is in a groove shape and is used for being inserted into the edge of the positive electrode cover plate;

the sealing ring is provided with an extension part, and the extension part extends into a gap formed between the inner side wall of the shell and the outer wall of the winding core.

Compared with the prior art, the beneficial effects of this application are:

the positive electrode current collecting disc, the positive electrode terminal and the liquid injection hole are designed into an integrated structure, so that the assembling process of the positive electrode current collecting disc and the pole terminal is reduced, the assembling cost is saved, the overall strength is high, the damage is avoided, and in addition, the liquid injection hole penetrates through the positive electrode terminal and the positive electrode current collecting disc along the height direction of the integrated structure, so that the liquid injection requirement can be met.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an integrated structure of a current collecting disc and a pole according to an embodiment of the present disclosure;

fig. 2 is another schematic structural diagram of an integrated structure of a current collecting disc and a pole according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of an integrated structure of a current collecting disc and a pole according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of an integrated structure of a current collecting disc and a pole according to a second embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a battery according to a third embodiment of the present disclosure;

FIG. 6 is an enlarged schematic view of FIG. 5 at A;

fig. 7 is a schematic structural diagram of a housing according to a third embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of a positive terminal according to a third embodiment of the present application.

Reference numerals:

the device comprises a 1-positive electrode current collecting disc, a 101-lightening hole, a 2-positive electrode terminal, a 3-liquid injection hole, a 31-liquid injection step, a 32-liquid injection inclined plane, a 4-explosion-proof valve, a 5-explosion-proof valve patch, a 6-sealing ring, a 61-second groove part, a 62-second protruding part, a 7-winding core, a 71-positive electrode lug, a 72-negative electrode lug, an 8-negative electrode current collecting disc, a 9-shell, a 91-first groove part, a 92-first protruding part and a 10-positive electrode cover plate.

Detailed Description

The following description of the embodiments of the present application will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown.

The components of the embodiments of the present application, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application.

All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In the description of the present application, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description of the present application and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

The following describes a current collecting plate and post integrated structure and a battery according to some embodiments of the present application with reference to fig. 1 to 8.

Example 1

Referring to fig. 1 to 3, embodiments of the present application provide an integrated structure of a current collecting plate and a pole, including: a positive electrode current collecting disc 1, a positive electrode terminal 2 and a liquid injection hole 3; the positive electrode terminal 2, the positive electrode current collecting plate 1 and the liquid injection hole 3 are of an integrated structure, and the liquid injection hole 3 penetrates through the positive electrode terminal 2 and the positive electrode current collecting plate 1 along the height direction of the integrated structure.

Based on the above-described structure, the positive electrode current collecting plate 1, the positive electrode terminal 2 and the liquid injection hole 3 are of an integrated structure, so that the assembling process of the positive electrode current collecting plate 1 and the pole terminal is reduced, the assembling cost is saved, the overall strength is high, the damage is avoided, and in addition, the liquid injection hole 3 penetrates through the positive electrode terminal 2 and the positive electrode current collecting plate 1 along the height direction of the integrated structure, and the liquid injection requirement can be met.

Further, preferably, the positive electrode terminal 2, the positive electrode current collecting plate 1 and the liquid injection hole 3 are integrally punched, so that the forming process is simple and convenient, and the overall strength is high.

In this embodiment, preferably, as shown in fig. 1, the positive electrode terminal 2 is formed on the upper surface of the positive electrode current collecting plate 1 and protrudes from the upper surface of the positive electrode current collecting plate 1, so as to facilitate the welding of the later module.

In this embodiment, preferably, as shown in fig. 1 and 2, the center lines of the positive electrode terminal 2, the positive electrode current collecting plate 1 and the liquid injection hole 3 extending along the height direction of the integrated structure are overlapped, and the center lines of the three overlapped center lines are just aligned with the center through hole of the winding core 7, so that the liquid injection efficiency is greatly improved.

In this embodiment, preferably, as shown in fig. 1, an injection step 31 is formed on the inner side wall of the upper portion of the injection hole 3 in the height direction of the injection hole 3.

According to the above-described structure, the liquid injection step 31 is used to abut against the liquid injection device, and support and limit the liquid injection device, thereby facilitating liquid injection.

Further, the pouring step 31 is preferably a one-stage step as shown in fig. 1, but it is needless to say that the pouring step is not limited thereto, and may be a multi-stage step, depending on the front end of the pouring device.

In this embodiment, preferably, as shown in fig. 1, the inner side wall of the pouring hole 3 located below the pouring step 31 is formed with a tapered pouring slope 32 along the height direction of the pouring hole 3, that is, the pouring slope 32 is tapered from top to bottom along the height direction of the pouring hole.

According to the above-described structure, the liquid injection inclined surface 32 plays a role in guiding insertion of the liquid injection end of the liquid injection device, and on the other hand, when the sealing explosion-proof valve 4 is installed after liquid injection, the liquid injection inclined surface 32 is matched with the edge of the explosion-proof valve 4, so that the liquid injection inclined surface 32 and the explosion-proof valve 4 are assembled more firmly and stably and are not easy to separate.

In addition, in combination with the foregoing, the liquid injection hole 3 is divided into three parts from top to bottom, that is, a liquid injection groove, a tapered hole and a circular hole, and the cross section of the liquid injection groove, the cross section of the tapered hole and the cross section of the circular hole are sequentially reduced along the direction perpendicular to the height direction of the liquid injection hole 3, the bottom wall of the liquid injection groove is the liquid injection step 31, and the side wall of the tapered hole is the liquid injection inclined surface 32.

Further, the angle of the injection slope 32 is preferably 70 ° -80 °, and of course, not limited thereto, but may be selected according to actual needs, for example, 70 ° or less, or 80 ° or more.

In this embodiment, the positive electrode current collecting plate 1 is preferably flat plate-shaped as shown in fig. 1 to 3, satisfying conventional assembly requirements.

Further, it is preferable that the thickness of the positive electrode collector plate 1 is 0.3mm to 0.5mm.

In this embodiment, the positive electrode terminal 2 is preferably a block with a circular cross section as shown in fig. 1 and 2, and is simple in structure and convenient to manufacture, but is not limited thereto.

Example two

The integral structure of the current collecting disc and the pole in the embodiment is an improvement based on the first embodiment, the technical content disclosed in the first embodiment is not repeated, and the disclosure of the first embodiment also belongs to the disclosure of the embodiment.

The integral structural member of the current collecting disc and the pole provided in the embodiment is different from the first embodiment in that: as shown in fig. 4, the positive current collecting plate 1 is formed with lightening holes 101 to help reduce the weight of the positive current collecting plate 1, and preferably, the lightening holes 101 extend through the edge of the positive current collecting plate 1, and preferably, the lightening holes 101 are provided in a plurality in number at intervals in sequence along the circumferential direction of the positive current collecting plate 1.

Further, the positive electrode current collecting plate 1 is preferably circular, and the weight reducing holes 101 are preferably semicircular, however, the shape of the positive electrode current collecting plate 1 is not limited to circular, but may be other shapes, such as square, etc., and the shape of the weight reducing holes 101 is not limited to semicircular, but may be other shapes, and the number of the weight reducing holes 101 may be selected according to actual needs.

Further, the positive electrode terminal 2 is preferably rectangular parallelepiped, and of course, the positive electrode terminal 2 is not limited to this, and may have other polygonal prism structures, and is specifically selected according to actual needs.

Example III

Referring to fig. 5, a third embodiment of the present application further provides a battery, which includes the integrated structure of the current collecting disc and the pole in any one of the embodiments, so that all the technical effects of the integrated structure of the current collecting disc and the pole are provided, and the same technical features and beneficial effects are not repeated.

In this embodiment, preferably, as shown in fig. 5 and 6, the battery further includes a case 9, a positive electrode cap plate 10, and a winding core 7; wherein, the winding core 7 is arranged in the shell 9, and the positive electrode cover plate 10 is covered at the top opening of the shell 9 (preferably, the shell 9 is of a structure with hollow inside and open top);

the positive electrode current collecting disc 1 of the integrated structure of the current collecting disc and the pole is connected with the positive electrode lug 71 of the winding core 7, the positive electrode cover plate 10 is provided with a through hole, and the positive electrode terminal 2 of the integrated structure of the current collecting disc and the pole extends to the outside of the positive electrode cover plate 10 through the through hole.

According to the above-described structure, in the battery provided by the application, the positive electrode terminal 2, the positive electrode current collecting disc 1 and the liquid injection hole 3 are of an integrated structure, so that the assembling process of the positive electrode current collecting disc 1 and the post terminal is reduced, the assembling cost is saved, the overall strength is high, the damage is avoided, and in addition, the liquid injection hole 3 penetrates through the positive electrode terminal 2 and the positive electrode current collecting disc 1 along the height direction of the integrated structure, and the liquid injection requirement can be met.

Further, it is preferable that the battery further includes a negative electrode current collecting plate 8, and the negative electrode current collecting plate 8 is welded with a negative electrode tab 72 at the bottom of the winding core 7, and when the winding core 7 is integrally mounted into the case 9, the negative electrode current collecting plate 8 is welded with the bottom of the case 9, so that the entire case 9 is negatively charged, as shown in fig. 5.

Further, preferably, the housing 9 is cylindrical, that is, the battery provided in the present application is a cylindrical battery, and the corresponding positive current collecting plate 1, negative current collecting plate 8 and positive cover plate 10 are also circular, however, not limited thereto, the housing 9 may also be rectangular, and the corresponding square battery, and the corresponding positive current collecting plate 1, negative current collecting plate 8 and positive cover plate 10 may also be square, or the housing 9 may also be polygonal, such as a pentagonal prism, a hexagonal prism, etc., which are specifically selected according to practical needs

In this embodiment, preferably, as shown in fig. 5 to 8, the battery further includes a sealing ring 6, and the sealing ring 6 is disposed between the inner sidewall of the case 9 and the edge of the positive electrode cap plate 10, functioning not only as a seal, but also as a barrier between the negatively charged case 9 and the positively charged positive electrode cap.

Further, preferably, as shown in fig. 6 to 8, the inner wall of the housing 9 is formed with a first groove portion 91 and a first protrusion portion 92, the seal ring 6 is formed with a second groove portion 61 and a second protrusion portion 62, and the second protrusion portion 62 is adapted to the first groove portion 91, and the first protrusion portion 92 is adapted to the second groove portion 61; the side of the second protruding portion 62, which is close to the positive electrode cover plate 10, is in a groove shape and is used for plugging the edge of the positive electrode cover plate 10.

As is apparent from the above-described structure, the seal ring 6 is designed in a rolling groove shape to be fitted with the protrusions and grooves on the inner wall of the case 9 and the edge of the positive electrode cap plate 10, thereby firmly mounting the seal ring 6 between the inner side wall of the case 9 and the positive electrode cap plate 10.

Further, preferably, the number of the aforementioned first groove portions 91 and first protruding portions 92 may also be plural, and correspondingly, the number of the second groove portions 61 and second protruding portions 62 may also be plural, and correspond.

Further, preferably, the seal ring 6 is formed with an extension portion, and the extension portion extends into a gap formed between the inner side wall of the housing 9 and the outer wall of the winding core 7, functioning as a seal gap.

In this embodiment, preferably, as shown in fig. 6, the battery further includes an explosion-proof valve 4, and the explosion-proof valve 4 is installed at the upper portion of the liquid injection hole 3.

According to the structure described above, the explosion-proof valve 4 is adopted as the sealing aluminum nail of the liquid injection hole 3, so that the welding of the one-time liquid injection sealing nail can be reduced and the welding reject ratio is reduced relative to the scheme that the liquid injection hole 3 and the explosion-proof valve 4 are separately designed.

In summary, the battery provided by the application is assembled as follows:

step 1, sequentially winding a positive plate, a diaphragm, a negative plate and the diaphragm into a winding core 7 (of course, not limited to the above, the winding core 7 can also be produced by adopting a Z-type lamination mode);

step 2, welding the negative electrode tab 72 of the winding core 7 and the negative electrode current collecting disc 8 together, and then welding the negative electrode current collecting disc 8 and the inner wall of the closed end at the bottom of the shell 9 together;

step 3, obtaining an integrated piece of the positive electrode current collecting disc 1 and the positive electrode terminal 2, namely an integrated structural piece of the current collecting disc and the pole column in a stamping mode;

step 4, connecting the positive electrode current collecting disc 1 in the integrated structural member of the current collecting disc and the pole column with the positive electrode lug 71 of the winding core 7 in a laser welding mode;

step 5, aligning the through holes on the positive electrode cover plate 10 with the positive electrode terminals 2 of the integrated structural members of the current collecting disc and the polar column, tightly pressing the through holes so that the positive electrode terminals 2 extend to the outside of the shell 9, and welding the positive electrode cover plate 10 with the integrated structural members of the current collecting disc and the polar column together in a laser welding mode;

step 6, installing a sealing ring 6 between the positive electrode cover plate 10 and the shell 9, and then sealing and connecting the shell 9 and the positive electrode cover plate 10 together through upsetting to obtain a complete single dry battery;

step 7, baking the single dry battery according to the normal flow of the lithium battery, injecting liquid once, forming and injecting liquid twice;

step 8, installing the explosion-proof valve 4 on the liquid injection inclined plane 32 at the liquid injection hole 3, welding the explosion-proof valve 4 at the liquid injection hole 3 in a laser welding mode, and installing the explosion-proof valve patch 5 at the liquid injection step 31 to form a complete battery;

and 9, finally, processing according to the conventional flow of the cylindrical lithium ion battery and obtaining the finished cylindrical battery.

Therefore, the positive electrode current collecting disc 1, the positive electrode terminal 2 and the liquid injection hole 3 are integrally punched, so that the assembling process of the positive electrode current collecting disc 1 and the electrode post terminal is reduced, and the assembling cost is saved; the upsetting sealing mode is adopted between the cover plate and the shell, so that the direct rate of the process is improved;

the center lines of the positive terminal 2, the positive current collecting disc 1 and the liquid injection hole 3, which extend along the height direction of the integrated structure, are overlapped, and the center lines of the overlapped center lines are exactly aligned with the center through hole of the winding core 7, so that the liquid injection efficiency is greatly improved;

the explosion-proof valve 4 is adopted as the sealing aluminum nail of the liquid injection hole 3, and compared with the scheme that the liquid injection hole 3 and the explosion-proof valve 4 are separately designed, the welding of the one-time liquid injection sealing nail can be reduced, and the welding reject ratio is reduced.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. An integrated structure of a current collecting plate and a pole, comprising: a positive electrode current collecting disc, a positive electrode terminal and a liquid injection hole; the positive electrode terminal, the positive electrode current collecting disc and the liquid injection hole are of an integrated structure, and the liquid injection hole penetrates through the positive electrode terminal and the positive electrode current collecting disc along the height direction of the integrated structure.

2. The integrated structure of current collecting plate and post according to claim 1, wherein the positive electrode terminal is formed on the upper surface of the positive electrode current collecting plate and protrudes from the upper surface of the positive electrode current collecting plate.

3. The unitary structure of current collecting tray and post of claim 1 wherein the center lines of said positive terminal, said positive current collecting tray and said liquid injection hole extending in the height direction of said unitary structure are coincident.

4. The integrated structure of the current collecting plate and the pole according to claim 1, wherein a liquid injection step is formed on an inner sidewall of an upper portion of the liquid injection hole along a height direction of the liquid injection hole.

5. The integrated structure of collector plate and pole of claim 4 wherein said liquid injection step is a primary step.

6. The integrated structure of collector plate and pole according to claim 4, wherein a tapered liquid injection slope is formed on an inner side wall of the liquid injection hole located below the liquid injection step along a height direction of the liquid injection hole.

7. The integrated structure of collector plate and pole of claim 6 wherein said injection ramp is at an angle of 70 ° to 80 °.

8. The integrated structure of a current collecting plate and a post according to any one of claims 1 to 7, wherein the positive current collecting plate is flat plate-like; and/or

The positive electrode current collecting disc is provided with a lightening hole; and/or

The thickness of the positive electrode current collecting disc is 0.3mm-0.5mm.

9. A battery comprising a housing, a positive cover, a winding core, and an integral structure of a current collecting tray and a post according to any one of claims 1 to 8; the coil core is arranged in the shell, and the positive electrode cover plate is covered at the top opening of the shell;

the positive electrode current collecting disc of the integrated structural member of the current collecting disc and the pole is connected with the positive electrode lug of the winding core, the positive electrode cover plate is provided with a through hole, and the positive electrode terminal of the integrated structural member of the current collecting disc and the pole penetrates through the through hole to extend to the outside of the positive electrode cover plate.

10. The battery of claim 9, further comprising an explosion-proof valve, and wherein the explosion-proof valve is mounted to an upper portion of the liquid injection hole; and/or

The battery also comprises a sealing ring, and the sealing ring is arranged between the inner side wall of the shell and the edge of the positive electrode cover plate;

the inner wall of the shell is provided with a first groove part and a first bulge part, the sealing ring is provided with a second groove part and a second bulge part, the second bulge part is matched with the first groove part, and the first bulge part is matched with the second groove part; one side of the second bulge part, which is close to the positive electrode cover plate, is in a groove shape and is used for being inserted into the edge of the positive electrode cover plate;

the sealing ring is provided with an extension part, and the extension part extends into a gap formed between the inner side wall of the shell and the outer wall of the winding core.