Pressing device for gasket of cylindrical battery and channeling device

Abstract

The utility model relates to the technical field of auxiliary equipment for battery production, in particular to a pressing device for a gasket of a cylindrical battery and a channeling device. A pressing device for a gasket of a cylindrical battery comprises a base and a pressing assembly which are oppositely arranged, the pressing assembly and the base can press the gasket of the battery and the bottom face of a steel shell of a battery cell respectively, and the distance between the base and the pressing assembly is adjustable. The initial distance between the base and the pressing assembly is smaller than the distance between a gasket and the outer bottom face of a battery cell, and the base and the pressing assembly can be connected to a channeling device. The utility model discloses a pressing device for a gasket of a cylindrical battery, and solves the problem that the insulation effect of the battery is influenced due to the fact that the gasket is easy to tilt or even fall off when a groove is rolled because a battery cell of the cylindrical battery in the prior art is provided with adhesive which can tilt up to jack up the gasket.

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary equipment for battery production, in particular to a pressing device for gaskets of cylindrical batteries and a groove rolling device. Background Art

[0002] Cylindrical batteries will have gaskets between the two poles of the winding core and the battery shell to achieve insulation. The battery cell will be provided with adhesive, but the adhesive may lift up the gasket. When the battery cell shell is grooved, the gasket is easy to lift up or even fall off, affecting the insulation effect of the battery. Utility Model Content

[0003] The purpose of the utility model is to solve the problem in the prior art that the battery cell of a cylindrical battery is provided with a glue sticker, which will rise up and thus lift up the gasket, making it easy for the gasket to rise up or even fall out during groove rolling, thus affecting the insulation effect of the battery. A pressing device for the gasket of a cylindrical battery and a groove rolling device are provided.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A pressing device for a gasket of a cylindrical battery comprises a base and a pressing assembly which are arranged relatively to each other. The pressing assembly and the base can respectively press the gasket of the battery and the bottom surface of the steel shell of the battery cell. The spacing between the base and the pressing assembly is adjustable. The initial spacing between the base and the pressing assembly is smaller than the distance from the gasket to the outer bottom surface of the battery cell. Both the base and the pressing assembly can be connected to a groove rolling device.

[0006] The initial spacing between the base and the clamping assembly is the distance between the base and the clamping assembly without being subjected to external forces.

[0007] When rolling grooves, the steel shell at the end closer to the gasket is not sealed, so the clamping assembly can extend into the battery shell and directly contact the gasket. Because the initial spacing between the base and the clamping assembly is smaller than the distance from the gasket to the outer bottom surface of the steel shell, and the spacing between the base and the pressure head is adjustable, when the battery cell is set between the base and the pressure head, both ends of the battery cell are subjected to force toward the battery cell, thereby compressing the gasket. Moreover, both the base and the pressure head can be connected to the rolling groove device, and the battery cell can be rolled grooved while the gasket is compressed, which can prevent the battery gasket from warping up or even detaching from the battery cell as much as possible, thereby ensuring the insulation effect of the battery as much as possible.

[0008] As a preferred embodiment of the utility model, the pressing assembly includes a pressing head, one end of which is used to press the battery cell, and the other end is provided with an elastic member. The pressing head is a hollow component, and when the battery cell is pressed, there is a cavity between the pressing head and the battery tab.

[0009] An elastic member is provided at one end of the pressure head away from the battery cell, so that the pressure head can approach or move away from the base, and when the battery is arranged between the base and the pressing assembly, the elastic member is in a compressed state, so it can provide a force for the battery cell to move toward the base, thereby pressing the gasket. The pressure head is a hollow member, and when the battery cell is arranged between the pressure head and the base, the pressure head can avoid the pole ear and avoid being damaged when pressing the gasket.

[0010] As a preferred solution of the present utility model, the clamping assembly is further provided with a limiting member, and the limiting member is used to limit the movement of the pressing head relative to the base.

[0011] The limiting member can limit the distance that the pressing head approaches or moves away from the base, thereby preventing the pressing head from loosening the battery cell due to the rotation of the battery cell when the battery cell is grooved, thereby affecting the groove pressing effect of the battery cell.

[0012] As a preferred solution of the utility model, the limiting member includes a sleeve, the sleeve is arranged at an end of the pressing head away from the base, and the sleeve covers the pressing head.

[0013] The sleeve outer sleeve is provided with a pressing head, which can limit the pressing head to move only along the length direction of the sleeve, thereby preventing the pressing head from deviating and damaging the steel shell of the battery.

[0014] As a preferred solution of the utility model, a waist-shaped hole is provided on the side of the sleeve, the length direction of the waist-shaped hole is parallel to the length direction of the sleeve, and the pressure head is provided with a through hole corresponding to the waist-shaped hole. The pin cooperates with the waist-shaped hole and the through hole to limit the movement distance of the pressure head along the length direction of the sleeve.

[0015] The pin passes through the waist-shaped hole and the through hole at the same time, which can limit the moving distance of the pressure head along the length direction of the sleeve.

[0016] As a preferred solution of the utility model, a stepped shaft is provided at one end of the sleeve away from the base, and a bearing is outer-circuited on the stepped shaft.

[0017] A bearing is arranged on the stepped shaft of the sleeve, so that when rolling the groove, the base and the pressure head at both ends of the battery can rotate together, avoiding the wear of the gasket due to asynchronous rotation of the base and the pressure head.

[0018] As a preferred solution of the present utility model, there are at least two bearings.

[0019] Providing at least two bearings is beneficial to improving the rotation concentricity of the clamping assembly and avoiding damage to the steel shell of the battery core during grooving.

[0020] As a preferred solution of the utility model, it also includes an elastic member, and two ends of the elastic member are respectively connected to the base and the clamping assembly.

[0021] The two ends of the elastic member are respectively connected to the base and the pressing assembly. When the battery is placed between the base and the pressing assembly, the elastic member is in a stretched state.

[0022] As a preferred solution of the utility model, it also includes an elastic member, and the elastic member is arranged on the base.

[0023] A grooving device comprises a rolling cutter mechanism, a pressing mechanism, a lifting mechanism and a clamping device for a gasket of a cylindrical battery as described above, wherein the clamping assembly is connected to the pressing mechanism, and the base is connected to the lifting mechanism. The rolling cutter mechanism can roll grooves on the steel shell of the battery cell, and the lifting mechanism can rotate along the vertical axis to drive the battery cell to rotate.

[0024] In actual use, the opening of the battery cell is grooved upward, the upper mechanism drives the battery cell to rotate, and the rolling cutter mechanism contacts the steel shell of the battery cell to roll the groove. Compared with the existing technology, the device can press the gasket during the groove rolling to prevent the gasket from tilting or falling off.

[0025] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0026] 1. A clamping device for a gasket of a cylindrical battery, which can clamp the two ends of a battery cell by setting a relative base and a clamping assembly. The spacing between the base and the clamping assembly is adjustable and the initial distance between the base and the clamping assembly is smaller than the distance from the gasket to the bottom surface of the outside of the battery cell. The clamping assembly and the base can clamp the gasket of the battery. The base and the clamping assembly can also be connected to a groove rolling device. When the steel shell of the battery cell is grooved, the gasket can still be clamped. This solves the problem in the prior art that the battery cell of the cylindrical battery is provided with a glue, which will rise up and lift up the gasket, making the gasket easily rise up or even fall out during the groove rolling, thereby affecting the insulation effect of the battery.

[0027] 2. A groove rolling device, comprising the above-mentioned pressing device for the gasket of a cylindrical battery, which can press the gasket when the steel shell of the battery cell is grooved, thereby preventing the gasket from warping up or even falling out of the steel shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of a pressing device for a gasket of a cylindrical battery in Example 1;

[0029] Figure 2 is an exploded view of a pressing device for a gasket of a cylindrical battery in Example 1;

[0030] Figure 3 is a plan view of a pressing device for a gasket of a cylindrical battery in Example 1;

[0031] Figure 4 yes Figure 3 Section along BB direction;

[0032] Figure 5 is a structural schematic diagram of a groove rolling device in Example 2;

[0033] Figure 6 is a plan view of a groove rolling device in Example 2;

[0034] Figure 7 yes Figure 6 Cross-section along the AA direction.

[0035] Icons: 1-battery cell, 2-base, 3-clamping assembly, 301-pressing head, 302-spring, 303-pin, 304-sleeve, 305-bearing, 306-locking nut, 4-hob mechanism, 5-pressing mechanism, 501-pressing electric cylinder, 502-pressing head, 6-lifting mechanism, 601-lifting electric cylinder, 602-rotating mechanism, 603-bottom mold. DETAILED DESCRIPTION

[0036] The utility model is described in detail below in conjunction with the accompanying drawings.

[0037] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0038] Example 1

[0039] like Figure 1 As shown, a pressing device for a gasket of a cylindrical battery comprises a base 2 and a pressing assembly 3 arranged relatively to each other, the pressing assembly 3 and the base 2 can respectively press the gasket of the battery and the bottom surface of the steel shell of the battery cell 1, the spacing between the base 2 and the pressing assembly 3 is adjustable, the initial spacing between the base 2 and the pressing assembly 3 is smaller than the distance from the gasket to the outer bottom surface of the battery cell, and the base 2 and the pressing assembly 3 can both be connected to a groove rolling device. When the groove is rolled, the steel shell at the end closer to the gasket is not sealed, so the pressing assembly 3 can extend into the battery shell to directly contact the gasket. Because the initial spacing between the base 2 and the pressing assembly 3 is smaller than the distance from the gasket to the outer bottom surface of the steel shell, and the spacing between the base 2 and the pressure head 301 is adjustable, when the battery cell 1 is arranged between the base 2 and the pressure head 301, both ends of the battery cell 1 are subjected to a force toward the battery cell 1, thereby being able to press the gasket.

[0040] like Figure 2As shown, the clamping assembly 3 includes a pressing head 301, one end of the pressing head 301 is used to clamp the battery cell 1, and the other end is provided with an elastic member. In this embodiment, a step shaft is provided at one end of the pressing head 301 away from the base 2, and a spring 302 is provided on the stepped shaft. When the battery cell 1 is arranged between the base 2 and the clamping assembly 3, the spring 302 is compressed. The form of the spring 302 also includes: it is arranged on the base 2, and when the battery cell 1 is arranged between the base 2 and the clamping assembly 3, the spring 302 is compressed; or the two ends of the spring 302 are respectively connected to the base 2 and the clamping assembly 3, and when the battery cell 1 is arranged between the base 2 and the clamping assembly 3, the spring 302 is stretched. The elastic member can also be a spring positioning bead whose movement direction is along the length direction of the battery cell 1. The initial spacing between the base 2 and the clamping assembly 3 is the spacing between the base 2 and the clamping assembly 3 when the spring 302 is not subjected to tension or pressure.

[0041] like Figure 2 As shown, the pressing head 301 is a hollow component, and there is a cavity between the pressing head 301 and the pole ear of the battery when the battery cell 1 is pressed. Because the pole ear protrudes from the gasket, when the battery cell 1 is arranged between the base 2 and the clamping assembly 3, the pressing head 301 will avoid the pole ear to avoid damaging the pole ear. The outer diameter of the pressing head 301 must also be smaller than the inner diameter of the rolling groove. In this embodiment, the cross-section of the pressing head 301 is a circular ring. The vertical distance from the pole ear to the center of the circle is 4.6mm, the pole ear length is 9mm, the inner diameter of the pressing head 301 is 14mm, the inner diameter of the rolling groove is designed to be 17.5mm, and the outer diameter of the pressing head 301 is 17mm.

[0042] The clamping assembly 3 is also provided with a limiter, which is used to limit the movement of the pressing head 301 relative to the base 2. Figure 2-Figure 4 As shown, the limiting member includes a sleeve 304, which is arranged at one end of the pressing head 301 away from the base 2, and the sleeve 304 covers the pressing head 301. A waist-shaped hole is arranged on the side of the sleeve 304, and the length direction of the waist-shaped hole is parallel to the length direction of the sleeve 304. The pressing head 301 is provided with a through hole corresponding to the waist-shaped hole, and the pin 303 cooperates with the waist-shaped hole and the through hole to limit the movement distance of the pressing head 301 along the length direction of the sleeve 304. Because the clamping assembly 3 in this embodiment can move, the length of the pressing head 301 extending out of the sleeve 304 in a free state is greater than the distance from the top of the battery core to the steel shell opening of the battery core.

[0043] like Figure 2-Figure 4As shown, a stepped shaft is provided at one end of the sleeve 304 away from the base 2, and a bearing 305 is provided on the stepped shaft. The bearing 305 is provided on the stepped shaft of the sleeve 304, so that when rolling grooves, the base 2 and the pressure head 301 at both ends of the battery can rotate together, avoiding the wear of the gasket due to the asynchronous rotation of the base 2 and the pressure head 301. In this embodiment, there are five bearings 305. Providing at least two bearings 305 is conducive to improving the rotation concentricity of the clamping assembly 3 and avoiding damage to the steel shell of the battery cell 1 when rolling grooves. The bearing 305 is fixed to the stepped shaft by a locking nut 306.

[0044] Example 2

[0045] like Figure 5 As shown, a grooving device comprises a rolling cutter mechanism 4, a pressing mechanism 5, a lifting mechanism 6 and a clamping device for a gasket of a cylindrical battery as in Example 1, wherein a clamping assembly 3 is connected to the pressing mechanism 5, and a base 2 is connected to the lifting mechanism 6. The rolling cutter mechanism 4 can roll grooves on the steel shell of the battery cell 1, and the lifting mechanism 6 can rotate along the vertical axis to drive the battery cell 1 to rotate.

[0046] like Figure 6-Figure 7 As shown, the pressing mechanism 5 includes a pressing electric cylinder 501 and a pressing head 502, the pressing head 502 is connected to the clamping assembly 3, and the pressing electric cylinder 501 is used to drive the pressing head 502 to move. The lifting mechanism 6 includes a lifting electric cylinder 601, a rotating mechanism 602 and a bottom die 603, the rotating mechanism 602 itself can rotate so as to drive the bottom die 603 to rotate, the bottom die 603 is connected to the base 2, and the lifting electric cylinder 601 is used to drive the rotating mechanism 602. The hob mechanism 4 includes a hob body (not shown in the figure) and a hob cam (not shown in the figure).

[0047] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pressing device for a gasket of a cylindrical battery, characterized in that: The invention comprises a base (2) and a pressing assembly (3) which are arranged opposite to each other, wherein the pressing assembly (3) and the base (2) can respectively press the gasket of the battery and the bottom surface of the steel shell of the battery cell (1), the spacing between the base (2) and the pressing assembly (3) is adjustable, the initial spacing between the base (2) and the pressing assembly (3) is smaller than the distance from the gasket to the outer bottom surface of the battery cell, and the base (2) and the pressing assembly (3) can both be connected to a groove rolling device.

2. The pressing device for a gasket of a cylindrical battery according to claim 1, characterized in that: The pressing assembly (3) comprises a pressing head (301), one end of the pressing head (301) is used to press the battery cell (1), and the other end is provided with an elastic member, the pressing head (301) is a hollow component, and when the battery cell (1) is pressed, a cavity is formed between the pressing head (301) and the battery tab.

3. The pressing device for a gasket of a cylindrical battery according to claim 2, characterized in that: The pressing assembly (3) is also provided with a limiting member, and the limiting member is used to limit the movement of the pressing head (301) relative to the base (2).

4. The pressing device for a gasket of a cylindrical battery according to claim 3, characterized in that: The limiting member comprises a sleeve (304), the sleeve (304) being arranged at an end of the pressing head (301) away from the base (2), and the sleeve (304) being sheathed around the pressing head (301).

5. The pressing device for a gasket of a cylindrical battery according to claim 4, characterized in that: The sleeve (304) is provided with a waist-shaped hole on the side thereof, the length direction of the waist-shaped hole being parallel to the length direction of the sleeve (304), the pressing head (301) is provided with a through hole corresponding to the waist-shaped hole, and the pin (303) cooperates with the waist-shaped hole and the through hole to limit the movement distance of the pressing head (301) along the length direction of the sleeve (304).

6. The pressing device for a gasket of a cylindrical battery according to claim 4, characterized in that: A stepped shaft is disposed at one end of the sleeve (304) away from the base (2), and a bearing (305) is disposed on the outer sleeve of the stepped shaft.

7. The pressing device for a gasket of a cylindrical battery according to claim 6, characterized in that: There are at least two bearings (305).

8. The pressing device for a gasket of a cylindrical battery according to any one of claims 1 to 7, characterized in that: It also comprises an elastic member, the two ends of which are respectively connected to the base (2) and the pressing assembly (3).

9. The pressing device for a gasket of a cylindrical battery according to any one of claims 1 to 7, characterized in that: It also comprises an elastic member, wherein the elastic member is arranged on the base (2).

10. A groove rolling device, characterized in that: The invention comprises a rolling cutter mechanism (4), a pressing mechanism (5), a lifting mechanism (6) and a clamping device for a gasket of a cylindrical battery as described in any one of claims 1 to 9, wherein the clamping assembly (3) is connected to the pressing mechanism (5), the base (2) is connected to the lifting mechanism (6), the rolling cutter mechanism (4) can roll grooves on the steel shell of the battery cell (1), and the lifting mechanism (6) can rotate along the vertical axis to drive the battery cell (1) to rotate.

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