CN219553752U - Cylindrical battery - Google Patents

Abstract

The utility model belongs to the technical field of batteries, and discloses a cylindrical battery, which comprises a shell, an inner core component and a first polar pole, wherein the shell is made of plastic materials so as to prevent the cylindrical battery from being short-circuited, and is provided with at least one mounting hole, the inner core component comprises a winding core arranged in the shell, one end of the winding core is provided with a first polar pole lug, the first polar pole lug can be electrically connected with the first polar pole, the mode sealing connection that first polarity utmost point post passed through the nanometer is moulded plastics in one of them mounting hole of casing reduces assembly process when realizing first polarity utmost point post and casing sealing connection, reduces battery weight to the one end that first polarity utmost point post is close to first polarity utmost point ear does not outstanding in the inner wall of casing, through shortening the length of first polarity utmost point post, reduces the use to the cylindrical battery inner space.

Description

Cylindrical battery

Technical Field

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

Background

Along with the development of technology, people are increasingly widely applied to batteries, wherein cylindrical batteries are widely applied to solar lamps, lawn lamps, standby energy sources, electric tools, toy models and photovoltaic energy sources due to the advantages of high capacity, long cycle life, wide use environment temperature and the like, the commonly used cylindrical batteries comprise a shell, first polar poles and second polar poles, wherein the polarities of the first polar poles and the second polar poles are opposite, and conductive materials are adopted and are arranged on the shell, so that the problems of short circuit and the like caused by communication between the two polar poles are avoided, a metal shell used in the prior art is replaced by a plastic shell, and in order to realize connection between the two polar poles and the plastic shell, mounting holes are usually formed in the plastic shell, and the first polar poles and the second polar poles are respectively arranged in the corresponding mounting holes.

In order to prevent the leakage of the battery, the first polar pole, the second polar pole and the mounting hole are in sealing connection, a riveting mode is generally adopted, the shape is in an I shape, the bottom of the I shape protrudes out of the inner wall of the shell, the sealing mode makes the assembly process complicated, the weight of the battery is increased while the internal space of the battery is occupied, and the prior lightweight concept is not met.

Accordingly, there is a need for an apparatus that solves the above-mentioned problems.

Disclosure of Invention

The utility model aims to provide a cylindrical battery, which simplifies the assembly process, reduces the weight of the cylindrical battery and reduces the use of the internal space of the cylindrical battery on the premise of ensuring the sealing connection between a first polar pole and a shell.

To achieve the purpose, the utility model adopts the following technical scheme: a cylindrical battery, comprising:

the shell is made of plastic materials and is provided with at least one mounting hole;

the inner core assembly comprises a winding core arranged in the shell, and one end of the winding core is provided with a first polar lug;

the first polar pole is connected to the mounting hole in a sealing mode through nano injection molding and can be electrically connected to the first polar pole lug, and one end, close to the first polar pole lug, of the first polar pole is not protruded out of the inner wall of the shell.

Preferably, the cylindrical battery further comprises a second polar pole, the second polar pole is connected with the other mounting hole formed in the shell in a sealing manner through nano injection molding, a second polar pole lug is arranged at the other end of the winding core, the second polar pole can be electrically connected with the second polar pole lug, and one end of the second polar pole, which is close to the second polar pole lug, does not protrude out of the inner wall of the shell.

Preferably, the inner core assembly further comprises a first current collecting disc and a second current collecting disc which are arranged in the shell, the first current collecting disc is electrically connected with the first polar lug and the first polar pole respectively, and the second current collecting disc is electrically connected with the second polar lug and the second polar pole respectively.

Preferably, the cylindrical battery further comprises a liquid injection hole formed in the first polar pole or the second polar pole, and the liquid injection hole can be communicated with the outside and the inner cavity of the shell.

Preferably, the device further comprises a sealing nail mounted on the first polar pole or the second polar pole, and the sealing nail is configured to seal the liquid injection hole.

Preferably, the sealing nail is made of conductive materials.

Preferably, the housing includes a bottom case having a hollow structure with one end opened, and a cover plate hermetically connected to the opened end of the bottom case.

Preferably, the cover plate has a thickness at least twice as thick as the bottom case.

Preferably, a plurality of annular protrusions are arranged on the shell at intervals.

Preferably, the shell is provided with a weak area, and the thickness of the weak area is smaller than that of other positions of the shell.

The beneficial effects are that: the cylindrical battery comprises a shell, an inner core assembly and a first polar pole, wherein the shell is made of plastic materials and is provided with at least one mounting hole, the inner core assembly comprises a winding core arranged in the shell, one end of the winding core is provided with a first polar pole lug, the first polar pole lug can be electrically connected to the first polar pole, the first polar pole is hermetically connected to the mounting hole in a nano injection molding mode, the assembly process is reduced while the sealing connection is realized, the weight of the battery is reduced, and one end of the first polar pole lug close to the first polar pole lug does not protrude out of the inner wall of the shell, and the use of the inner space of the cylindrical battery is reduced by shortening the length of the first polar pole lug.

Drawings

Fig. 1 is a schematic structural view of a cylindrical battery according to an embodiment of the present utility model.

In the figure: 11. a cover plate; 12. a bottom case; 21. a winding core; 211. a first polarity tab; 212. a second polarity tab; 22. a first collecting tray; 23. a second collecting tray; 3. a first polarity post; 4. a second polarity post; 5. a liquid injection hole; 6. and (5) sealing the nails.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

Example 1

The embodiment provides a cylindrical battery, as shown in fig. 1, including a housing, an inner core component, a first polar pole 3 and a second polar pole 4, two mounting holes are formed in the housing, the inner core component is disposed in the housing, the first polar pole 3 is connected with one of the mounting holes in a sealing manner, and is electrically connected with the inner core component, the second polar pole 4 is connected with the other mounting hole in a sealing manner, and is also electrically connected with the inner core component, and meanwhile, one ends of the first polar pole 3 and the second polar pole 4, which are close to the inner core component, do not protrude out of the inner surface of the housing.

In this embodiment, the housing includes a bottom shell 12 and a cover plate 11, wherein the bottom shell 12 is a hollow structure with an opening at one end, the cover plate 11 is connected to the opening end of the bottom shell 12 in a sealing manner, and the sealing connection can be achieved by welding formation or hot melting manner, and two mounting holes are respectively opened on the cover plate 11 and the bottom shell 12.

It will be appreciated that two mounting holes may also be provided in the cover plate 11 at the same time.

Further, the thickness of the case is set between 0.5mm and 5mm, the volume of the cylindrical battery is controlled while the deformation strength is ensured, and preferably, the thickness of the cover plate 11 is set to be twice that of the bottom case 12, preventing the cover plate 11 from collapsing by the energy released from the cylindrical battery during charge and discharge.

Further, the cover plate 11 and the bottom case 12 are both made of plastic materials.

Further, a plurality of annular protrusions are further arranged on the shell, the annular protrusions can be arranged on the cover plate 11 and the bottom shell 12 respectively, the annular protrusions are arranged at intervals, the uneven surface is formed on the shell, the surface area of the shell is further enlarged, the heat dissipation area of the cylindrical battery is increased, and the heat dissipation efficiency is improved.

In this embodiment, the inner core assembly includes a winding core 21, a first current collecting disc 22 and a second current collecting disc 23, both ends of the winding core 21 are respectively electrically connected to the first current collecting disc 22 and the second current collecting disc 23, the first current collecting disc 22 is electrically connected to the first polar pole 3, and the second current collecting disc 23 is electrically connected to the second polar pole 4, so as to form a current path inside the cylindrical battery.

Preferably, the first current collecting plate 22 and the first polar pole 3 may be connected by welding, and may also be integrally formed.

Further, the two ends of the winding core 21 are extended with the first polar tab 211 and the second polar tab 212, both of which can be electrically conductive, the first polar tab 211 is electrically connected to the first current collecting plate 22, and the second polar tab 212 is electrically connected to the second current collecting plate 23, so that the internal short circuit of the cylindrical battery can be prevented while the current path is assisted.

In other embodiments, the end of the winding core 21 may extend out of a plurality of first polar tabs 211 and a plurality of second polar tabs 212, where each first polar tab 211 is electrically connected to the first current collecting plate 22, and each second polar tab 212 is electrically connected to the second current collecting plate 23, so as to improve the electrical conductivity of the cylindrical battery.

In this embodiment, the sealing connection between the first polar pole 3 and the second polar pole 4 and the two mounting holes is realized by nano injection molding, which is a connection process, and is a process of combining metal and plastic by nano technology, namely, after the metal surface is subjected to nano treatment, the plastic is directly injection molded on the metal surface, so that the metal and the plastic can be integrally molded and finally combined into a product, wherein the term "nano" refers to a micro-porous process, namely, the metal surface is subjected to nano micro-porous treatment through a specific solution, and the main purpose is to better combine the metal surface and the plastic and improve the connection strength. The first polar pole 3, the second polar pole 4 and the two mounting holes are connected through the nano injection molding process, so that the sealing connection is realized, the connection strength is improved, and the assembly process is reduced and the self weight of the battery is reduced because parts such as a sealing ring, a rivet and the like are not needed.

Preferably, when the first polar pole 3 is connected to the mounting hole formed in the cover plate 11, the end face of the first polar pole 3 near the first polar lug 211 does not protrude from the inner surface of the cover plate 11, when the first polar pole 3 is connected to the mounting hole formed in the bottom shell 12, the end face of the first polar pole 3 near the first polar lug 211 does not protrude from the inner surface of the bottom shell 12, and similarly, when the second polar pole 4 is connected to the mounting hole formed in the cover plate 11, the end face of the second polar pole 4 near the second polar lug 212 does not protrude from the inner surface of the cover plate 11, and when the second polar pole 4 is connected to the mounting hole formed in the bottom shell 12, the end face of the second polar pole 4 near the second polar lug 212 does not protrude from the inner surface of the bottom shell 12, so that the lengths of the first polar pole 3 and the second polar pole 4 are shortened while the electrical connection of the first polar pole 3 and the second polar pole 4 to the inner core assembly is achieved, the inner space of the cylindrical battery is not occupied, and the energy density of the cylindrical battery is improved.

Further, the first polar pole 3 and the second polar pole 4 are both made of metal materials.

Further, the cylindrical battery further comprises a liquid injection hole 5, the liquid injection hole 5 is formed in the first polar pole 3 or the second polar pole 4, one end of the liquid injection hole 5 is communicated with the outside, the other end of the liquid injection hole is communicated with the inner cavity of the shell, correspondingly, a sealing nail 6 is arranged on the first polar pole 3 or the second polar pole 4, and after electrolyte is injected into the cylindrical battery through the liquid injection hole 5, the liquid injection hole 5 is blocked through the sealing nail 6, so that liquid leakage of the cylindrical battery is prevented. And because the sealing nail 6 is usually welded to the plugging mode of the liquid injection hole 5, the liquid injection hole 5 is arranged on the first polar pole 3 or the second polar pole 4 made of metal materials, and the structural performance and the shape of the shell made of plastic materials can be prevented from being influenced by high temperature in the welding process.

Further, the materials of the sealing nail 6 and the first polar pole 3 and the second polar pole 4 are the same, so that the welding strength of the sealing nail 6 and the first polar pole 3 or the second polar pole 4 is improved.

Preferably, the cover plate 11 is provided with a weak area, the weak area can be in a runway shape, a rectangle, a triangle and the like, the thickness of the weak area is smaller than that of other areas of the shell, the weak area serves as an explosion-proof valve, and the pressure relief and heat dissipation effects are achieved when the cylindrical battery is charged and discharged.

Alternatively, the weak area may be provided on the bottom chassis 12, or the weak areas may be provided on both the cover plate 11 and the bottom chassis 12.

The cylindrical battery provided in this embodiment is installed: first, the first polar lug 211 and the first current collecting disc 22 are electrically connected, the second polar lug 212 and the second current collecting disc 23 are electrically connected, the first polar pole 3 and the first current collecting disc 22 are connected, the first polar pole 3 is mounted on the cover plate 11 through a nano injection molding process, the second polar pole 4 and the second current collecting disc 23 are connected, the second polar pole 4 is mounted on the bottom shell 12 through a nano injection molding process, the cover plate 11 and the bottom shell 12 are hermetically connected through a hot melt molding or welding molding mode, the first polar pole 3 or the second polar pole 4 is provided with a liquid injection hole 5, electrolyte is injected into the inner cavity of the shell through the liquid injection hole 5, and after the electrolyte injection is completed, the liquid injection hole 5 is blocked through the sealing nail 6.

Example two

The difference between the first embodiment and the second embodiment is that the structure of the housing is different, and illustratively, the housing of the first embodiment includes an upper housing and a lower housing, the upper housing and the lower housing are hollow structures with one end open, and the upper housing and the lower housing are formed and sealed in a welding manner, and in addition, the sealing connection of the upper housing and the lower housing can be realized through hot melting.

Further, the upper shell and the lower shell are both made of plastic materials.

Preferably, the upper shell and the lower shell are respectively provided with a mounting hole, and the first polar pole 3 and the second polar pole 4 are respectively connected in the two mounting holes in a sealing way through a nano injection molding technology.

When the first polar pole 3 is in sealing connection with the mounting hole formed in the upper case, the end face of the first polar pole 3, which is close to the first polar lug 211, does not protrude from the inner surface of the upper case, when the first polar pole 3 is in sealing connection with the mounting hole formed in the lower case, the end face of the first polar pole 3, which is close to the first polar lug 211, does not protrude from the inner surface of the lower case, similarly, when the second polar pole 4 is in sealing connection with the mounting hole formed in the upper case, the end face of the second polar pole 4, which is close to the second polar lug 212, does not protrude from the inner surface of the upper case, and when the second polar pole 4 is in sealing connection with the mounting hole formed in the lower case, the end face of the second polar pole 4, which is close to the second polar lug 212, does not protrude from the inner surface of the lower case.

The cylindrical battery provided in this embodiment is installed: the first polar lug 211 is electrically connected with the first current collecting disc 22, the second polar lug 212 is electrically connected with the second current collecting disc 23, the first polar pole 3 is connected with the first current collecting disc 22, the first polar pole 3 is hermetically connected with one of the mounting holes through a nano injection molding process, the second polar pole 4 is connected with the second current collecting disc 23, the second polar pole 4 is hermetically connected with the other mounting hole through a nano injection molding process, the upper shell and the lower shell are hermetically connected in a hot melt molding or welding molding mode, the first polar pole 3 or the second polar pole 4 is provided with a liquid injection hole 5, electrolyte is injected into the inner cavity of the shell through the liquid injection hole 5, and after the electrolyte injection is completed, the liquid injection hole 5 is plugged through a sealing nail 6.

Example III

The structure of the present embodiment is different from that of the first and second embodiments, and the housing provided in the present embodiment is formed by assembling a side housing with two open ends and two top caps, where the two top caps are respectively and hermetically connected to the two open ends of the side housing, and the connection mode may be welding molding or hot melting molding.

Further, the side shell and the two top covers are made of plastic materials, and the thickness of the two cover plates is far greater than that of the side shell.

Further, two top covers are respectively provided with a mounting hole, the first polar pole 3 and the second polar pole 4 are respectively connected in the two mounting holes in a sealing way through nano injection molding, one end of the first polar pole 3, which is close to the first polar pole lug 211, does not protrude from the inner surface of the top cover, and likewise, one end of the second polar pole 4, which is close to the second polar pole lug 212, does not protrude from the inner surface of the top cover.

The cylindrical battery provided in this embodiment is installed: the method comprises the steps of electrically connecting a first polar lug 211 with a first current collecting disc 22, electrically connecting a second polar lug 212 with a second current collecting disc 23, connecting a first polar pole 3 with the first current collecting disc 22, sealing and connecting the first polar pole 3 with one of mounting holes through a nano injection molding process, connecting a second polar pole 4 with the second current collecting disc 23, sleeving a side shell outside an inner core assembly and abutting one of the top covers, sealing and connecting the second polar pole 4 with the other mounting hole through the nano injection molding process, sealing and connecting the side shell with the two top covers through a hot melt molding or welding molding mode, opening a liquid injection hole 5 on the first polar pole 3 or the second polar pole 4, injecting electrolyte into an inner cavity of a shell through the liquid injection hole 5, and sealing the liquid injection hole 5 through a sealing nail 6 after liquid injection is completed.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. Cylindrical battery, its characterized in that includes:

the shell is made of plastic materials and is provided with at least one mounting hole;

the inner core assembly comprises a winding core (21) arranged in the shell, and one end of the winding core (21) is provided with a first polar lug (211);

the first polar pole (3), first polar pole (3) pass through nanometer injection seal connect in the mounting hole, and can the electricity connect in first polar utmost point ear (211), first polar pole (3) be close to the one end of first polar utmost point ear (211) does not protrude in the inner wall of casing.

2. The cylindrical battery according to claim 1, further comprising a second polar post (4), wherein the second polar post (4) is connected to the other mounting hole formed in the housing in a sealing manner through nano injection molding, a second polar tab (212) is disposed at the other end of the winding core (21), the second polar post (4) can be electrically connected to the second polar tab (212), and one end of the second polar post (4) close to the second polar tab (212) does not protrude out of the inner wall of the housing.

3. The cylindrical battery according to claim 2, wherein the inner core assembly further comprises a first current collecting plate (22) and a second current collecting plate (23) disposed within the housing, the first current collecting plate (22) being electrically connected to the first polar tab (211) and the first polar post (3), respectively, and the second current collecting plate (23) being electrically connected to the second polar tab (212) and the second polar post (4), respectively.

4. The cylindrical battery according to claim 2, further comprising a liquid injection hole (5) formed in the first polar pole (3) or the second polar pole (4), wherein the liquid injection hole (5) can communicate an outside with an internal cavity of the housing.

5. The cylindrical battery according to claim 4, further comprising a sealing spike (6) mounted on the first polar column (3) or the second polar column (4), the sealing spike (6) being configured to close off the liquid injection hole (5).

6. Cylindrical battery according to claim 5, characterized in that the sealing nail (6) is made of an electrically conductive material.

7. The cylindrical battery according to claim 1, wherein the case comprises a bottom case (12) and a cover plate (11), the bottom case (12) is a hollow structure having one end opened, and the cover plate (11) is hermetically connected to the open end of the bottom case (12).

8. Cylindrical battery according to claim 7, characterized in that the thickness of the cover plate (11) is at least twice the thickness of the bottom shell (12).

9. The cylindrical battery according to any one of claims 1 to 8, wherein a plurality of annular protrusions are provided at intervals on the case.

10. The cylindrical battery according to any one of claims 1 to 8, wherein a weakened area is provided on the case, and the weakened area has a thickness smaller than that of other positions of the case.