CN219350446U - Cylindrical battery - Google Patents

Abstract

The utility model discloses a cylindrical battery, and relates to the field of batteries. The cylindrical battery comprises a shell, an electric core, a cap and a control board, wherein the shell is respectively provided with an open end and a closed end, the open end is provided with a first roller groove and a second roller groove which are coaxially distributed, and the first roller groove is closer to the closed end than the second roller groove; the cap is embedded in the first roller groove, the control board is embedded in the second roller groove, a first electrode is arranged on the control board, and the first electrode is electrically connected with the cap; the battery cell is accommodated in the shell, a first electrode lug and a second electrode lug are respectively led out from two opposite ends of the battery cell, the first electrode lug is electrically connected with the cover cap, and the second electrode lug is electrically connected with the closed end. The cylindrical battery provided by the utility model has the advantages of low assembly difficulty, high assembly efficiency and more stable and reliable overall structure.

Description

Cylindrical battery

Technical Field

The utility model relates to the field of batteries, in particular to a cylindrical battery.

Background

The cylindrical battery on the market is provided with a positive electrode cover plate and a negative electrode cover plate at two ends of the shell respectively, and in the assembling process, the positive electrode cover plate and the negative electrode cover plate are required to be welded on the shell respectively, so that time and labor are wasted, and the assembling efficiency is low. And, the lid is fixed on the electric core, lacks the fixed connection between casing, leads to overall structure unstable, easily receives the vibration and leads to the electrical connection inefficacy in practical application.

Disclosure of Invention

The utility model aims to provide a cylindrical battery which has the characteristics of low assembly difficulty, high assembly efficiency and more stable and reliable overall structure.

The utility model provides a technical scheme that:

the cylindrical battery comprises a shell, an electric core, a cap and a control board, wherein the shell is respectively provided with an opening end and a closed end, the opening end is provided with a first roller groove and a second roller groove which are coaxially distributed, and the first roller groove is closer to the closed end than the second roller groove; the cap is embedded in the first roller groove, the control board is embedded in the second roller groove, a first electrode is arranged on the control board, and the first electrode is electrically connected with the cap; the battery cell is accommodated in the shell, a first tab and a second tab are respectively led out from two opposite ends of the battery cell, the first tab is electrically connected with the cap, and the second tab is electrically connected with the closed end.

Further, a first thimble is convexly arranged on one side, close to the cap, of the control plate, the first thimble is electrically connected with the first electrode, and the first thimble is abutted with the cap.

Further, the control board comprises an insulating substrate, the first electrode and the first thimble are respectively arranged on two opposite sides of the insulating substrate, and the periphery of the insulating substrate is embedded into the second roller groove.

Further, a second thimble is convexly arranged on one side, close to the control panel, of the cap, a female seat is arranged on one side, close to the cap, of the control panel, the female seat is electrically connected with the first electrode, and the second thimble is spliced with the female seat.

Further, the control board comprises an insulating base body, the first electrode and the female seat are respectively arranged on two opposite sides of the insulating base body, and the periphery of the insulating base body is embedded into the second roller groove.

Further, the end wall of the open end defines a groove wall of the side of the second roller groove away from the closed end, and the end wall of the open end is attached to the side of the control plate away from the cap.

Further, a through hole is formed in the end wall of the opening end, the first electrode is arranged on one side, away from the cap, of the control board in a protruding mode, and the first electrode extends out of the shell from the through hole.

Further, the closed end protrudes away from the opening end to form a second electrode, and the second electrode lug is electrically connected with the second electrode.

Further, the control panel is further provided with a pressure relief hole, and the pressure relief hole is communicated with a space surrounded by the shell, the control panel and the cap.

Further, the cap comprises an electric connection assembly and an insulating sealing piece arranged on the periphery of the electric connection assembly, the insulating sealing piece is embedded into the first roller groove, and the first tab is electrically connected with the first electrode through the electric connection assembly.

Compared with the prior art, the cylindrical battery provided by the utility model has the advantages that the cap is embedded with the first roller groove arranged at the opening end of the shell, so that the reliable fixing of the cap is realized. The control panel is embedded with the second roller groove at the opening end of the shell and is electrically connected with the first tab of the battery cell through the cap, so that one electrode of the battery is formed, the cover of the opening end of the shell is realized, and an additional welding anode cover plate is omitted. The second lug of the battery core is electrically connected with the closed end of the shell to form the other electrode of the battery, and the additional welding of a negative electrode cover plate is avoided. Therefore, the cylindrical battery provided by the utility model has the beneficial effects that: the assembly difficulty is low, the assembly efficiency is high, and the overall structure is more stable and reliable.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present utility model, the drawings that are required to be used in the embodiments will be briefly described. It is appreciated that the following drawings depict only certain embodiments of the utility model and are therefore not to be considered limiting of its scope. Other relevant drawings may be made by those of ordinary skill in the art without undue burden from these drawings.

Fig. 1 is a schematic view showing a cylindrical battery according to a first embodiment of the present utility model;

fig. 2 is a schematic sectional view of a cylindrical battery according to a second embodiment of the present utility model.

Icon: 100-cylindrical batteries; 110-a housing; 111-open ends; 112-a first roll groove; 113-a second roll groove; 114-closed end; 115-a second electrode; 120-capping; 121-a second thimble; 130-control panel; 131-a first electrode; 132-a first thimble; 133-an insulating matrix; 134-female seat.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. The components of the embodiments of the present utility model 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 utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships conventionally put in place when the inventive product is used, or the directions or positional relationships conventionally understood by those skilled in the art are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, terms such as "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected, detachably connected, or integrally connected; 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 above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The following describes specific embodiments of the present utility model in detail with reference to the drawings.

First embodiment

Referring to fig. 1, fig. 1 is a schematic sectional view of a cylindrical battery 100 according to the present embodiment.

The cylindrical battery 100 provided in this embodiment includes a housing 110, a cap 120, a battery cell (not shown in the figure), and a control board 130. The battery cell and the cap 120 are mounted inside the housing 110, and the control board 130 is fixed on the housing 110.

The casing 110 is cylindrical, two ends in the axial direction are respectively provided with an open end 111 and a closed end 114, a cylindrical cavity surrounded by the casing 110 is communicated with the outside through the open end 111, a first roller groove 112 and a second roller groove 113 are annularly concavely arranged on the inner side wall of the open end 111, the first roller groove 112 and the second roller groove 113 are coaxially arranged at intervals in the axial direction of the casing 110, and the first roller groove 112 is closer to the closed end 114 of the casing 110 than the second roller groove 113.

The cells are housed inside the housing 110 and between the first roller slot 112 and the closed end 114. The battery cell is cylindrical, and a first tab and a second tab are respectively led out from two ends of the battery cell in the axial direction, wherein the first tab is closer to the first roller groove 112, and the second tab is closer to the closed end 114 of the casing 110 and is electrically connected with an inner end wall of the closed end 114.

The cap 120 is embedded in the first roller groove 112 and is electrically connected with the first tab of the battery cell, the control board 130 is embedded in the second roller groove 113, the control board 130 is provided with a first electrode 131, and the first electrode 131 is electrically connected with the cap 120, so that the conduction with the first tab of the battery cell is realized.

As can be seen, in the cylindrical battery 100 provided in this embodiment, the cap 120 is engaged with the first roller groove 112, so as to reliably fix the cap 120 and the housing 110. The control board 130 is embedded with the second roller groove 113 and is electrically connected with the first tab of the battery through the cap 120 to form one electrode of the battery, and the cover of the opening end 111 of the shell 110 is realized, so that the additional welding of the anode cover plate is avoided. The second tab of the cell is electrically connected to the inner end wall of the closed end 114 of the housing 110 to form the other electrode of the battery, eliminating the need for an additional welded negative cover plate. Therefore, the cylindrical battery 100 provided by the utility model has the characteristics of low assembly difficulty, high assembly efficiency and more stable and reliable overall structure.

It is understood that in practical applications, the housing 110 is made of metal, and before assembly, the first roller groove 112 and the second roller groove 113 may not be formed at the open end 111 of the housing 110, and at this time, the inner diameter of the housing 110 is larger than the diameters of the cap 120 and the control board 130.

During assembly, the cap 120 is mounted at one end of the battery cell and electrically connected to the first tab of the battery cell, and then the battery cell and the cap 120 are sent into the housing 110. Then, by means of roll forming, two ring grooves are roll formed on the outer side wall of the shell 110 at positions corresponding to two opposite sides of the cap 120, so that a first roll groove 112 is formed between the two ring grooves, the cap 120 and the first roll groove 112 are in a jogged state, the cap 120 is fixed on the shell 110, a closed space is enclosed between the cap 120 and the closed end 114, and the battery cell is located in the closed space.

After the mounting of the battery cell and the cap 120 is completed, the control board 130 is fed into the housing 110 from the open end 111 of the housing 110, and the electrical connection of the first electrode 131 on the control board 130 and the cap 120 is completed. Thereafter, the side wall of the housing 110 is turned inwardly at a portion of the open end 111 to form an end wall of the open end 111, the end wall of the open end 111 defining a groove wall of the second roller groove 113 on a side thereof remote from the closed end 114, the end wall of the open end 111 being in abutment with a side of the control plate 130 remote from the cap 120. And then, a ring groove is formed on the outer side wall of the shell 110 at a position corresponding to one side of the control plate 130, which is close to the cap 120, so that a second roller groove 113 is formed between the ring groove and the end wall of the open end 111, at this time, the control plate 130 and the second roller groove 113 are in a jogged state, so that the cap 120 is fixed on the shell 110, and the open end 111 of the shell 110 is closed.

To further simplify the assembly process, in this embodiment, the second tab of the battery cell is held in abutment with the inner end wall of the closed end 114 of the housing 110. In other embodiments, the second tab may be welded to closed end 114. In fact, the closed end 114 protrudes away from the open end 111 to form a second electrode 115, and the second electrode lug is electrically connected to the second electrode 115, i.e. the second electrode lug is kept in contact with the second electrode 115 in this embodiment.

In order to reduce the difficulty in electrically connecting the first electrode 131 and the cap 120, in this embodiment, a first thimble 132 is protruding from a side of the control board 130 near the cap 120, the first thimble 132 is electrically connected to the first electrode 131, and the first thimble 132 is abutted to the cap 120.

Therefore, in practical application, during the process of feeding the control board 130 into the housing 110, when the first thimble 132 abuts against the cap 120, the control board 130 stops continuously entering the housing 110, and at this time, the first electrode 131 is conducted with the cap 120 through the first thimble 132, so as to establish an electrical connection between the first electrode 131 and the first tab.

It is understood that the polarities of the first electrode 131 and the second electrode 115 are opposite, in order to prevent the first electrode 131 from conducting with the housing 110 to cause a short circuit, in this embodiment, the control board 130 includes an insulating substrate 133, the first electrode 131 and the first thimble 132 are respectively disposed on two opposite sides of the insulating substrate 133, and the periphery of the insulating substrate 133 is embedded in the second roller groove 113.

The cap 120 is a cap 120 structure commonly used for batteries, and comprises an electrical connection assembly and an insulating sealing member arranged at the periphery of the electrical connection assembly, wherein the insulating sealing member is embedded into the first roller groove 112, and the first tab is electrically connected with the first thimble 132 through the electrical connection assembly, i.e. the electrical connection assembly is not in contact with the housing 110.

In this embodiment, the end wall of the opening end 111 encloses a through hole, the first electrode 131 is protruding on the side of the insulating substrate 133 away from the cap 120, and the first electrode 131 extends out of the housing 110 from the through hole for connecting to an external circuit. It is understood that the first electrode 131 is not in contact with the wall of the through hole.

In addition, in this embodiment, a pressure relief hole (not shown) is further formed in the insulating substrate 133, and the pressure relief hole is communicated with a space enclosed by the housing 110, the control board 130 and the cap 120, so as to rapidly relieve pressure when the battery cell is shorted or burned externally, and prevent explosion caused by excessive pressure in the housing 110.

Second embodiment

Referring to fig. 2, fig. 2 is a schematic sectional view of a cylindrical battery 100 according to the present embodiment.

The cylindrical battery 100 provided in this embodiment is different from the first embodiment in the structure of the cap 120 and the control board 130. In this embodiment, a second thimble 121 is protruding on a side of the cap 120 close to the control board 130, a female seat 134 is disposed on a side of the control board 130 close to the cap 120, the female seat 134 is electrically connected to the first electrode 131, and the second thimble 121 is inserted into the female seat 134.

Also, the control board 130 includes an insulating base 133, and the first electrode 131 and the female socket 134 are respectively disposed on opposite sides of the insulating base 133, and the peripheral edge of the insulating base 133 is embedded in the second roller groove 113.

In fact, in the present embodiment, the female base 134 is protruding on a side of the insulating base 133 near the cap 120, and the end wall of the female base 134 is concavely provided with a plugging hole. In practical application, during the process of feeding the control board 130 into the housing 110, when the second thimble 121 is inserted into the plugging hole on the female seat 134, the control board 130 stops continuously entering the housing 110, and at this time, the first electrode 131 is conducted with the cap 120 through the female seat 134 and the second thimble 121, so as to establish an electrical connection between the first electrode 131 and the first tab.

In other embodiments, the specific structure of the electrical connection between the control board 130 and the cap 120 may be adjusted according to practical application conditions. For example, external threads may be disposed on the sidewall of the second thimble 121, and a threaded hole may be disposed on the female socket 134, so that the second thimble 121 is relatively screwed into the threaded hole of the female socket 134 by rotating the insulating base 133 during the process of feeding the control board 130 into the housing 110, thereby establishing a more reliable fit between the second thimble 121 and the female socket 134.

In addition, in the first embodiment and the second embodiment, the first tab of the battery cell is a positive tab, the second tab of the battery cell is a negative tab, the first electrode 131 on the control board 130 is a positive electrode, and the second electrode 115 protruding from the closed end 114 is a negative electrode. In other embodiments, the positive and negative polarities may be exchanged, that is, the first tab of the battery cell is a negative tab, the second tab of the battery cell is a positive tab, the first electrode 131 on the control board 130 is a negative electrode, and the second electrode 115 protruding from the closed end 114 is a positive electrode.

In conclusion, the cylindrical battery 100 provided by the application has the characteristics of low assembly difficulty, high assembly efficiency and more stable and reliable overall structure.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. The cylindrical battery is characterized by comprising a shell, an electric core, a cap and a control board, wherein the shell is respectively provided with an open end and a closed end, the open end is provided with a first roller groove and a second roller groove which are coaxially distributed, and the first roller groove is closer to the closed end than the second roller groove; the cap is embedded in the first roller groove, the control board is embedded in the second roller groove, a first electrode is arranged on the control board, and the first electrode is electrically connected with the cap; the battery cell is accommodated in the shell, a first tab and a second tab are respectively led out from two opposite ends of the battery cell, the first tab is electrically connected with the cap, and the second tab is electrically connected with the closed end.

2. The cylindrical battery of claim 1, wherein a first thimble is protruding from a side of the control plate near the cap, the first thimble being electrically connected to the first electrode, and the first thimble being in abutment with the cap.

3. The cylindrical battery according to claim 2, wherein the control plate includes an insulating base, the first electrode and the first thimble are disposed on opposite sides of the insulating base, respectively, and a peripheral edge of the insulating base is embedded in the second roller groove.

4. The cylindrical battery of claim 1, wherein a second thimble is protruding from a side of the cap, which is close to the control board, and a female socket is provided on a side of the control board, which is close to the cap, and the female socket is electrically connected to the first electrode, and the second thimble is inserted into the female socket.

5. The cylindrical battery according to claim 4, wherein the control board comprises an insulating base body, the first electrode and the female socket are respectively disposed on opposite sides of the insulating base body, and a peripheral edge of the insulating base body is embedded in the second roller groove.

6. The cylindrical battery of claim 1, wherein the end wall of the open end defines a groove wall on a side of the second roller groove remote from the closed end, the end wall of the open end conforming to a side of the control panel remote from the cap.

7. The cylindrical battery according to claim 6, wherein a through hole is provided in an end wall of the open end, the first electrode is provided protruding on a side of the control plate away from the cap, and the first electrode protrudes from the case through the through hole.

8. The cylindrical battery of claim 1, wherein the closed end protrudes away from the open end to form a second electrode, the second electrode being electrically connected to the second electrode.

9. The cylindrical battery of claim 1, wherein the control plate is further provided with a pressure relief hole, and the pressure relief hole communicates with a space enclosed by the housing, the control plate and the cap.

10. The cylindrical battery of claim 1, wherein the cap comprises an electrical connection assembly and an insulating seal disposed about a periphery of the electrical connection assembly, the insulating seal being embedded within the first roller groove, the first tab being electrically connected to the first electrode via the electrical connection assembly.

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