Cylindrical battery

Abstract

A battery cell is arranged in a shell, a first collector plate and a second collector plate are respectively welded at two ends of the battery cell, the first collector plate is connected with a pole, one end of the pole penetrates through the shell and is connected with a nut, the pole is electrically insulated from the shell, and the second collector plate is connected with the shell and is provided with a liquid injection hole. The diameter of the sealing nail is matched with that of the second current collecting plate, the sealing nail is arranged on one side, far away from the battery cell, of the second current collecting plate and is connected with the second current collecting plate, and the plugging rubber nail is used for sealing the liquid injection hole and is clamped between the sealing nail and the second current collecting plate. The cylindrical battery has the beneficial effects that liquid injection hole welding sealing is replaced by plugging rubber nail sealing, and the plugging rubber nail is clamped on the second collector plate through the sealing nail, so that the cylindrical battery is not influenced by residual electrolyte. And the sealing nail not only has an extrusion effect on the plugging rubber nail, but also can replace a bottom shell or a cover plate, so that the assembly process is simplified. The explosion-proof valve plate is integrated on the pole, so that the cylindrical battery is provided with an explosion-proof valve.

Description

TECHNICAL FIELD

[0001] The utility model relates to cylindrical battery technical field, concretely relates to a cylindrical battery. BACKGROUND

[0002] In the battery assembling process, electrolyte needs to be injected into the battery through the liquid injection hole, and then the liquid injection hole is sealed. In the existing battery structure, especially in the cylindrical battery, the liquid injection hole is usually arranged on the bottom shell or integrated on the top pole. The sealing of the liquid injection hole is usually achieved by welding a sealing pin on the liquid injection hole of the shell or the pole. However, during the battery liquid injection process, electrolyte is inevitably left around the liquid injection hole. The residual electrolyte will affect the welding effect when welding the sealing pin, resulting in welding defects such as loose welding, blowhole welding, incomplete welding, pinhole, and offset welding. In addition, there is also a size deviation in the liquid injection hole processing process, which will increase the welding difficulty and affect the sealing effect of the battery, thereby affecting the sealing and safety of the battery. In addition, when the cylindrical battery is used as a large-capacity power battery or energy storage battery, an explosion-proof valve needs to be integrated on the cylindrical battery. Therefore, there is an urgent need for a new cylindrical battery. SUMMARY

[0003] The utility model discloses a cylindrical battery adopts the sealing of plugging rubber nail to replace the liquid injection hole welding sealing, and the sealing pin is used to clamp the plugging rubber nail on the second current collector, which is not affected by the residual electrolyte. The sealing pin not only plays a role in extruding the plugging rubber nail, but also replaces the bottom shell or the cover plate, simplifying the assembly process. The explosion-proof valve piece is integrated on the pole, so that the cylindrical battery has the explosion-proof valve.

[0004] The utility model discloses a cylindrical battery, including the shell, the sealing pin and the plugging rubber nail, be equipped with the electric core in the shell, the electric core both ends are welded respectively first current collector and second current collector, first current collector is connected with the pole, the one end of pole is connected with the nut through the shell, the pole and the shell electrically insulating, second current collector is connected with the shell and is set up with the liquid injection hole, the diameter of sealing pin and the diameter of second current collector match, sealing pin is located second current collector away from the side of electric core and is connected with second current collector, the plugging rubber nail is used for sealing liquid injection hole and is clamped between sealing pin and second current collector.

[0005] In some embodiments, the first current collector is provided with a through hole, and the pole is provided with a channel communicated with the through hole. The channel is provided with an explosion-proof valve piece at an end away from the through hole.

[0006] In some embodiments, the second current collector is provided with a stepped edge, and the maximum diameter of the stepped edge is equal to the diameter of the shell.

[0007] In some embodiments, the sealing rubber nail comprises a base and a sealing column for sealing the liquid injection hole, and the base is clamped between the sealing nail and the second current collecting disc.

[0008] In some embodiments, the base thickness matches the height of the step edge.

[0009] In some embodiments, the sealing column is a tapered column, and the large diameter end of the tapered column is connected with the base.

[0010] In some embodiments, the first current collecting disc is provided with a sunken platform, the pole is provided with a base and a stud, the base is located in the sunken platform, and the stud penetrates through the shell and is connected with a nut.

[0011] In some embodiments, first and second gaskets are further included, the first gasket is located between the nut and the shell, and the second gasket is sleeved on the pole and located between the first current collecting disc and the shell.

[0012] In some embodiments, the second gasket is a T-shaped gasket, comprising a ring-shaped sheet and an insulating sleeve, the ring-shaped sheet is used for insulating the first current collecting disc from the shell, and the insulating sleeve is used for insulating the pole from the shell.

[0013] In some embodiments, the sealing rubber nail is made of corrosion-resistant rubber material.

[0014] Compared with the prior art, the utility model discloses the liquid injection hole is arranged at the poleless end of the cylindrical battery, and the sealing rubber nail is sealed instead of the liquid injection hole welding sealing, and the sealing nail is clamped on the second current collecting disc through the sealing nail. Without welding the sealing hole, even if the residual electrolyte is near the sealing hole, the welding of the sealing nail and the second current collecting disc is not affected. The sealing nail not only has the extrusion effect on the sealing rubber nail, but also can replace the bottom shell or cover plate, simplifying the assembly process. The explosion-proof valve plate is integrated on the pole, so that the cylindrical battery has the explosion-proof valve.

[0015] The utility model will be described in detail below in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is the explosion drawing of the utility model.

[0017] Fig. 2 It is the internal structure schematic view of the utility model.

[0018] Wherein, 1, shell, 2, electric core, 3, first current collector, 4, second current collector, 5, pole, 6, blocking rubber nail, 7, sealing nail, 8, nut, 9, first gasket, 10, second gasket, 11, explosion-proof valve piece. DETAILED DESCRIPTION

[0019] As Figs. 1-2 shown, a cylindrical battery, comprising a shell 1, a sealing nail 7 and a blocking rubber nail 6, the shell 1 is provided with an electric core 2, the electric core 2 is respectively welded with a first current collector 3 and a second current collector 4 at both ends, the first current collector 3 is connected with a pole 5, one end of the pole 5 penetrates through the shell 1 and is connected with a nut 8, the fixing of the pole 5 and the shell 1 is realized through the nut 8, the pole 5 is electrically insulated from the shell 1, the second current collector 4 is connected with the shell 1 and is provided with a liquid injection hole, the diameter of the sealing nail 7 matches the diameter of the second current collector 4, the sealing nail 7 is arranged on the side of the second current collector 4 away from the electric core 2 and is connected with the second current collector 4, the blocking rubber nail 6 is used for sealing the liquid injection hole and is clamped between the sealing nail 7 and the second current collector 4. When the cylindrical battery is injected with liquid, the electrolyte is injected into the battery through the liquid injection hole on the second current collector 4, after the liquid injection is completed, the blocking rubber nail 6 is inserted into the liquid injection hole, and then the sealing nail 7 and the edge of the second current collector 4 are welded together, the utility model sets the liquid injection hole at the pole-free end of the cylindrical battery, seals the liquid injection hole by the blocking rubber nail 6, and clamps the blocking rubber nail 6 on the second current collector 4 by the sealing nail 7. Without welding the sealing hole, even if there is residual electrolyte near the sealing hole, it does not affect the welding of the sealing nail 7 and the second current collector 4. The sealing nail 7 not only plays a pressing role on the blocking rubber nail 6, but also can replace the bottom shell 1 or the cover plate, simplifying the assembly process.

[0020] In some embodiments, the first current collector 3 is provided with a through hole, the pole 5 is provided with a channel communicated with the through hole, and the channel is provided with an explosion-proof valve piece 11 away from the through hole. Specifically, the explosion-proof valve piece 11 is welded with the pole 5. The explosion-proof valve piece 11 is integrated on the pole 5, so that the cylindrical battery has an explosion-proof valve, and the explosion-proof valve and the liquid injection hole are arranged at two ends of the cylindrical battery, and do not affect each other.

[0021] In some embodiments, the second current collector 4 is provided with a stepped edge, and the maximum diameter of the stepped edge is equal to the diameter of the shell 1. The stepped edge is arranged to facilitate the welding of the sealing nail 7 and the shell 1 on both sides of the second current collector 4, so that the sealing nail 7 replaces the bottom shell 1, and at the same time, the stepped edge can also make the sealing nail 7 and the second current collector 4 have a space to accommodate the blocking rubber nail 6.

[0022] In some embodiments, the sealing rubber plug 6 comprises a base and a sealing column, the sealing column is used to seal the liquid injection hole, and the base is clamped between the sealing plug 7 and the second current collector 4. The base can prevent the sealing rubber plug 6 from falling into the battery and affecting the performance of the battery.

[0023] In some embodiments, the thickness of the base matches the height of the step edge. Specifically, the thickness of the base is equal to or slightly greater than the height of the step edge, so that the sealing plug 7 can clamp the sealing rubber plug 6 on the second current collector 4, thereby improving the sealing performance of the liquid injection hole.

[0024] In some embodiments, the sealing column is a tapered column, and the large-diameter end of the tapered column is connected with the base. The tapered column is convenient for installation. Further preferably, the maximum diameter of the tapered column matches the diameter of the liquid injection hole.

[0025] In some embodiments, the first current collector 3 is provided with a sunken platform, the pole 5 is provided with a base and a threaded column, the base is located in the sunken platform, and the threaded column penetrates through the shell 1 and is connected with the nut 8. By arranging the base of the pole 5 in the sunken platform of the first current collector 3, the space between the first current collector 3 and the shell 1 can be reduced, and the installation space of the battery cell 2 in the shell 1 can be increased.

[0026] In some embodiments, the first gasket 9 is located between the nut 8 and the shell 1, and is used to realize the insulation between the nut 8 and the shell 1. The second gasket 10 is sleeved on the pole 5 and located between the first current collector 3 and the shell 1, and is used to realize the insulation between the first current collector 3, the pole 5 and the shell 1.

[0027] In some embodiments, the second gasket 10 is a T-shaped gasket, which comprises a ring-shaped sheet and an insulating sleeve. The ring-shaped sheet is used to insulate the first current collector 3 from the shell 1, and the insulating sleeve is used to insulate the pole 5 from the shell 1. The first gasket 9 in combination with the second gasket 10 can realize the insulation between the pole 5 and the shell 1, that is, the isolation of the positive and negative electrodes. In addition, the first gasket 9 in combination with the second gasket 10 can also fix the relative position of the pole 5 and the shell 1, prevent mutual friction, and increase the sealing performance.

[0028] In some embodiments, the sealing rubber plug 6 is made of corrosion-resistant rubber material.

[0029] In the description of the utility model, it is necessary to understand that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0030] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0031] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0032] In the utility model, the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the description, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0033] Although the above embodiments have been shown and described, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the utility model, and the changes, modifications, replacements and modifications of the above embodiments made by those skilled in the art are within the protection scope of the utility model.

Claims

1. A cylindrical battery, characterized by: Including shell, sealing nail and sealing rubber nail, the shell is equipped with the electric core, the electric core both ends are welded first and second current collecting disc respectively, the first current collecting disc is connected with the pole, the one end of the pole is connected with the nut and is penetrated through the shell, the pole and the shell are electrically insulated, the second current collecting disc is connected with the shell and is equipped with the liquid injection hole, the diameter of the sealing nail matches with the diameter of the second current collecting disc, the sealing nail is equipped with the second current collecting disc and is connected with the second current collecting disc, the sealing rubber nail is used for sealing the liquid injection hole and is clamped between the sealing nail and the second current collecting disc.

2. The cylindrical battery according to claim 1, characterized by: The first current collecting disc is equipped with the through hole, the pole is equipped with the channel that communicates with the through hole, the channel is equipped with the explosion-proof valve piece and is away from the through hole.

3. The cylindrical battery according to claim 1 or 2, characterized by: The second current collecting disc is equipped with the step edge, and the maximum diameter of the step edge is equal to the diameter of the shell.

4. The cylindrical battery according to claim 3, characterized by: The sealing rubber nail includes the base and the sealing column, the sealing column is used for sealing the liquid injection hole, and the base is clamped between the sealing nail and the second current collecting disc.

5. The cylindrical battery of claim 4, wherein: The thickness of the base matches with the height of the step edge.

6. The cylindrical battery of claim 4, wherein: The sealing column is a tapered column, and the large diameter end of the tapered column is connected with the base.

7. The cylindrical battery according to claim 1 or 2, characterized by: The first current collecting disc is equipped with the sunken platform, the pole is equipped with the base and the stud, the base is located in the sunken platform, and the stud is connected with the nut and is penetrated through the shell.

8. The cylindrical battery according to claim 1 or 2, characterized by: It also includes the first gasket and the second gasket, the first gasket is located between the nut and the shell, and the second gasket is sleeved on the pole and is located between the first current collecting disc and the shell.

9. The cylindrical battery of claim 8, wherein: The second gasket is a T-shaped gasket, including the annular sheet and the insulating sleeve, the annular sheet is used for insulating the first current collecting disc and the shell, and the insulating sleeve is used for insulating the pole and the shell.

10. The cylindrical battery according to claim 1 or 2, characterized by: The sealing rubber nail is made of anticorrosive rubber material.

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