CN210156266U

CN210156266U - Vibration-resistant battery capacitor

Info

Publication number: CN210156266U
Application number: CN201921127790.4U
Authority: CN
Inventors: 毛霏; 卜芳; 吴小娟; 祝媛; 袁中直
Original assignee: Eve Energy Co Ltd
Current assignee: Eve Energy Co Ltd
Priority date: 2019-07-17
Filing date: 2019-07-17
Publication date: 2020-03-17
Anticipated expiration: 2029-07-17

Abstract

The utility model discloses an anti-vibration battery capacitor, which comprises a steel shell, a winding core, a cap component and an insulating gasket, wherein the steel shell is provided with a containing cavity, the winding core is arranged in the containing cavity, the insulating gasket is arranged between the winding core and the bottom of the steel shell, the winding core comprises a positive plate, a first diaphragm, a negative plate and a second diaphragm, the widths of the first diaphragm and the second diaphragm are respectively larger than the widths of the positive plate and the negative plate, the first diaphragm and the second diaphragm respectively protrude out of the positive plate and the negative plate to form a protruding part, the cap component is sealed at the opening end of the steel shell, one end of the cap component close to the containing cavity is abutted against the protruding part, the bottom of the winding core is provided with a negative lug, the negative lug is connected with the negative plate, two ends of the negative lug respectively extend along the radial direction of the winding core to respectively form a first negative lug and a second negative lug, the first negative lug passes through the, and the second negative pole lug is bent towards the opening end of the steel shell and then welded with the side wall of the steel shell. The vibration-resistant battery capacitor has good vibration resistance.

Description

Vibration-resistant battery capacitor

Technical Field

The utility model relates to a secondary power supply technical field especially relates to a vibration resistant battery capacitor.

Background

The battery capacitor is often used for manufacturing a super capacitor, is a novel charge storage element, has the advantages of large capacity, large-current charge and discharge support, long cycle life, environmental protection, no pollution and the like compared with a common battery, and is widely applied to the fields of new energy, transportation, industry and the like. The head of the negative pole lug is led out in a one-way mode, a single branch point on the steel shell is welded with the negative pole lug, and due to the fact that the thickness of the negative pole lug is very thin and the single branch point on the steel shell is welded with the negative pole lug, the negative pole lug is easily broken due to the fact that the negative pole lug is pulled by vibration in the using process, connection failure of the negative pole lug and the steel shell is further caused, and the service life of the battery capacitor is shortened.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: provided is a vibration-resistant battery capacitor having excellent vibration resistance.

In order to achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides an anti vibration battery capacitor, includes the steel-shelled, rolls up core, cap subassembly and insulating gasket, the steel-shelled has top opening, the bottom confined chamber that holds, roll up the core set up in hold the intracavity, insulating gasket sets up roll up between the core with the bottom of steel-shelled, roll up the core and include positive plate, first diaphragm, negative pole piece and the second diaphragm of superpose in proper order, the width of first diaphragm and second diaphragm all is greater than the width of positive plate and negative pole piece, and first diaphragm and second diaphragm bulge respectively in positive plate and negative pole piece form the bulge, the cap subassembly seals at the open end of steel-shelled, and the cap subassembly is close to the one end that holds the chamber with the bulge butt, the bottom of rolling up the core is provided with the negative pole ear, the negative pole ear with the negative pole piece is connected, just the both ends of negative pole ear are followed respectively roll up the radial direction of core and extend, form first negative pole ear and second negative pole ear respectively, first negative pole ear passes insulating pad with the bottom welding of box hat, second negative pole ear orientation the open end of box hat after buckling with the lateral wall welding of box hat.

As a preferable technical solution of the vibration-resistant battery capacitor, the length of the second negative electrode tab is greater than that of the first negative electrode tab, and one end of the second negative electrode tab, which is far away from the first negative electrode tab, extends to the opening end of the steel shell.

As a preferable technical scheme of the vibration-resistant battery capacitor, the length of the first negative electrode tab is 11.00-13.00 mm, and the length of the second negative electrode tab is 51.00-53.00 mm.

As a preferable technical solution of the vibration-resistant battery capacitor, the first negative electrode tab includes a first welding region and a first non-welding region, the first welding region is welded to the bottom of the steel can, the second negative electrode tab includes a second welding region and a second non-welding region, the second welding region is welded to the sidewall of the steel can, and the outer surface of the first non-welding region and the outer surface of the second non-welding region are both wrapped by a high-temperature adhesive layer.

As a preferable technical scheme of the anti-vibration battery capacitor, the insulation gasket is provided with a tab through hole in a penetrating manner, and the first negative tab penetrates through the tab through hole to be welded with the bottom of the steel shell.

As an optimal technical scheme of the anti-vibration battery capacitor, a positioning hole is formed in the center of the insulating gasket in a penetrating mode, the positioning hole is used for assisting in positioning the first welding area at the bottom of the steel shell, the tab through holes are arranged at intervals with the positioning hole, and the central line of the positioning hole coincides with the central line of the central hole of the winding core.

As a preferable technical scheme of the vibration-resistant battery capacitor, a limiting groove is concavely arranged on the lower surface of the insulating gasket, a limiting bulge is convexly arranged at the bottom of the steel shell towards the limiting groove, the limiting bulge and the limiting groove are both in an annular structure, and the limiting bulge is inserted into the limiting groove in a matched manner;

or the like, or, alternatively,

the lower surface of the insulating gasket faces towards the bottom of the steel shell and is convexly provided with a limiting protrusion, the bottom of the steel shell is concavely provided with a limiting groove, the limiting protrusion and the limiting groove are both of annular structures, and the limiting protrusion is inserted into the limiting groove in a matched mode.

As a preferable technical solution of the vibration-resistant battery capacitor, the length of the protrusion is greater than 4.00 mm.

As a preferable technical scheme of the vibration-proof battery capacitor, the difference between the inner diameter of the steel shell and the outer diameter of the winding core is 0.30-0.05 mm.

As a preferred technical scheme of anti vibration battery capacitor, the periphery of book core still is provided with insulating adhesive tape, a side of insulating adhesive tape with roll core bonding, insulating adhesive tape keeps away from roll core a side with the lateral wall bonding of steel casing.

The utility model has the advantages that: the bottom and the side wall of the steel shell are provided with fixing points for the negative pole lugs at the same time; two negative pole ears weld with the plane of the difference of box hat simultaneously for on two fixed points different planes of box hat of rolling up the core, to the restraint of rolling up the core at two directions of box hat, the reinforcing rolls up the fixed action of core in the box hat is inside, can reduce the possibility that the negative pole ear is broken under the vibration environment, improves the anti vibration performance of electric capacity battery. In addition, because the bulge butt of cap subassembly and first diaphragm and second diaphragm will hold the inside hole of chamber and fill up through the bulge of diaphragm, utilize the bulge to the vibration buffering, prevent to roll up the core and take place to shift in the inside of steel casing, and then reduce the possibility that the welding drops between negative pole ear and the steel casing.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Fig. 1 is a schematic structural diagram of a vibration-resistant battery capacitor according to an embodiment.

Fig. 2 is a schematic diagram of the vibration-resistant battery capacitor according to the embodiment, in which the high-temperature glue layer wraps the first negative electrode tab and the second negative electrode tab.

Fig. 3 is a schematic structural diagram of an insulating gasket according to an embodiment (the limiting groove is not shown).

In the figure:

1. a cap assembly; 2. a winding core; 201. a positive plate; 202. a first diaphragm; 203. a negative plate; 204. a second diaphragm; 205. a first negative electrode tab; 206. a second negative tab; 207. a projection; 208. a central bore; 209. a positive tab; 3. an insulating spacer; 301. a limiting groove; 302. a tab through hole; 303. positioning holes; 4. a steel shell; 401. a limiting bulge; 5. and (4) a high-temperature adhesive layer.

Detailed Description

In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1-3, the utility model provides a vibration resistance battery capacitor, including steel casing 4, roll up core 2, block subassembly 1 and insulating gasket 3, steel casing 4 has top opening, bottom confined chamber that holds, roll up core 2 set up in hold the intracavity, insulating gasket sets up roll up core 2 with between the bottom of steel casing 4. The winding core 2 comprises a positive electrode sheet 201, a first diaphragm 202, a negative electrode sheet 203 and a second diaphragm 204 which are sequentially stacked, the widths of the first diaphragm 202 and the second diaphragm 204 are both larger than the widths of the positive electrode sheet 201 and the negative electrode sheet 203, and the first diaphragm 202 and the second diaphragm 204 respectively protrude from the positive electrode sheet 201 and the negative electrode sheet 203 to form protruding parts 207. The block subassembly 1 is sealed the open end of box hat 4, just block subassembly 1 is close to hold the one end in chamber with bulge 207 butt, the bottom of rolling up core 2 is provided with the negative pole ear, the negative pole ear with negative pole piece 203 is connected, just the both ends of negative pole ear are followed respectively roll up the extension of core 2 radial direction, form first negative pole ear 205 and second negative pole ear 206 respectively. The first negative tab 205 penetrates through the insulating gasket 3 to be welded with the bottom of the steel shell 4, and the second negative tab 206 is bent towards the opening end of the steel shell 4 and then welded with the side wall of the steel shell 4. Specifically, the upper end of the winding core 2 is provided with a positive tab 209, one end of the positive tab 209 is welded with the positive plate 201, and the other end is riveted with the cap assembly 1. The first negative tab 205 and the second negative tab 206 are opposite in direction, and the second negative tab 206 and the cap assembly are insulated from each other.

Set up two opposite direction's first negative pole ear 205 and second negative pole ear 206 at the bottom of rolling up core 2, first negative pole ear 205 passes insulating gasket 3 and is connected with the bottom of box hat 4, provides the fixed point for the negative pole ear in the bottom of box hat 4, and second negative pole ear 206 orientation the open end of box hat 4 after buckling with the lateral wall of box hat 4 is connected, provides a fixed point again for the negative pole ear at the lateral wall of box hat 4. The bottom and the lateral wall through steel-shelled 4 set up the fixed point mode to the negative pole ear simultaneously, and the negative pole ear welds with the plane of the difference of steel-shelled 4 simultaneously for on two fixed point steel-shelled 4 different planes of rolling up core 2, to the restraint of rolling up core 2 in two directions of steel-shelled 4, the reinforcing rolls up the fixed action of core 2 in steel-shelled 4 inside, can reduce the possibility that the negative pole ear is broken under the vibration environment, improves the anti vibration performance of electric capacity battery. Set up insulating gasket 3 between the bottom of rolling up core 2 and steel-shelled 4, will roll up the bottom of core 2 and the bottom interval of steel-shelled 4, guarantee battery capacitor's security performance. In addition, because the cap assembly 1 abuts against the protruding parts 207 of the first diaphragm 202 and the second diaphragm 204, the holes inside the containing cavity are filled up through the protruding parts 207 of the diaphragms, vibration is buffered by the protruding parts 207, the winding core 2 is prevented from shifting inside the steel shell 4, and the possibility of welding falling between the negative electrode lugs and the steel shell 4 is further reduced.

The length of the second negative tab 206 is greater than that of the first negative tab 205, and one end of the second negative tab 206, which is far away from the first negative tab 205, extends to the open end of the steel can 4, so that the second negative tab 206 and the side wall of the steel can 4 can be conveniently welded at a position close to the open end.

Specifically, the first negative tab 205 includes a first welding area and a first non-welding area, the first welding area is welded to the bottom of the steel can 4, the second negative tab 206 includes a second welding area and a second non-welding area, the second welding area is welded to the side wall of the steel can 4, and the outer surface of the first non-welding area and the outer surface of the second non-welding area are both wrapped by the high temperature glue layer 5. Generally, the thicknesses of the first negative electrode tab 205 and the second negative electrode tab 206 are thin, the high temperature glue layer 5 wraps the outer surface of the first non-welding area and the outer surface of the second non-welding area, and when the first negative electrode tab 205 and the second negative electrode tab 206 are bent in use, the high temperature glue layer 5 buffers the negative electrode tabs, so that the bending force applied to the negative electrode tabs is dispersed, the possibility of the breakage of the negative electrode tabs is further reduced, and the vibration resistance and the tensile property of the negative electrode tabs are enhanced.

The second welding region is located at one end of the second negative tab 206 away from the first negative tab 205. The second welding region is arranged at one end of the second negative tab 206 far away from the first negative tab 205, so that the second welding region is adjacent to the open end of the steel can 4, and welding of the second negative tab 206 and the side wall of the steel can 4 is facilitated.

Preferably, the length of the protrusion 207 is greater than 4.00mm, ensuring that the diaphragm provides sufficient cushioning to the cap assembly 1.

In this embodiment, the height of the steel can 4 is 49.40mm, the height of the winding core 2 is 48.00mm, wherein the widths of the positive plate 201 and the negative plate 203 are both 41.00mm, the widths of the first diaphragm 202 and the second diaphragm 204 are both 48.00mm, the length of the first negative tab 205 is 11.00-13.00 mm, and the length of the second negative tab 206 is 51.00-53.00 mm. This design for block subassembly 1 is sealed when the open end of box hat 4, block subassembly 1 supports tightly with the bulge 207 of diaphragm, reduces to roll up the ascending activity space of core 2 in vertical direction, avoids rolling up core 2 and rock up and down in vertical direction. In this specification, the widths of the first diaphragm 202 and the second diaphragm 204 refer to: the first diaphragm 202 and the second diaphragm 204 are located at a distance from the end adjacent to the bottom of the steel can 4 to the end adjacent to the open end of the steel can 4 when the winding core 2 is placed in the receiving cavity.

Wherein the difference between the inner diameter of the steel shell 4 and the outer diameter of the winding core 2 is 0.30-0.05 mm. Specifically, the outer diameter of the winding core 2 is 13.55-13.75 mm, the inner diameter of the steel shell 4 is 13.80mm, and the moving space of the winding core 2 in the horizontal direction inside the steel shell 4 is reduced as much as possible.

In this embodiment, the insulating gasket 3 is provided with a tab through hole 302, and the first negative tab 205 is welded to the bottom of the steel shell 4 through the tab through hole 302. In specific use, the first negative electrode tab 205 is inserted into the back surface of the insulating gasket 3 through the tab through hole 302 from the upper surface of the insulating gasket 3, and finally the first negative electrode tab 205 is located between the back surface of the insulating gasket 3 and the bottom of the steel shell 4. Specifically, the tab through hole 302 has a rectangular structure.

In order to ensure that the first negative electrode tab 205 has a large enough welding area and is welded to the bottom of the steel can 4, the first negative electrode tab 205 is bent after passing through the tab through hole 302, and then one side surface of the first negative electrode tab 205 is abutted to the bottom of the steel can 4, in this embodiment, the center of the insulating gasket 3 is penetrated by a positioning hole 303, the positioning hole 303 is used for assisting in positioning the first welding region at the bottom of the steel can 4, the tab through hole 302 is spaced from the positioning hole 303, and the center line of the positioning hole 303 coincides with the center line of the center hole 208 of the winding core 2. When the welding structure is used specifically, after the first negative electrode tab 205 penetrates through the tab through hole 302, one end of the first negative electrode tab 205 is bent towards one side of the insulating gasket 3, so that the first negative electrode tab 205 covers the positioning hole 303, then the welding pin penetrates through the central hole 208 of the winding core 2, the lower end part of the welding pin abuts against the first negative electrode tab 205 located in the positioning hole 303, and the welding pin abuts against the first negative electrode tab 205 towards the bottom of the steel shell 4.

As a preferred embodiment, the lower surface of the insulating gasket 3 is concavely provided with a limiting groove 301, the bottom of the steel shell 4 faces the limiting groove 301 and is convexly provided with a limiting protrusion 401, the limiting protrusion 401 and the limiting groove 301 are both in an annular structure, and the limiting protrusion 401 is inserted into the limiting groove 301 in a matching manner. In the process of placing the insulating gasket 3 at the bottom of the steel shell 4, the insulating gasket 3 is conveniently superposed at the bottom of the steel shell 4 through the mutual matching of the limiting groove 301 and the limiting protrusion 401. In addition, due to the mutual matching of the limiting groove 301 and the limiting protrusion 401, the possibility that the insulating gasket 3 is displaced in the horizontal direction relative to the steel shell 4 is reduced, so that the insulating gasket 3 is prevented from being displaced relative to the steel shell 4 to drive the first negative electrode tab 205 to be displaced. In another embodiment, the limiting protrusion 401 may be further disposed on the lower surface of the insulating gasket 3 in a protruding manner, the limiting groove 301 is disposed at the bottom of the steel shell 4 in a recessed manner, the limiting protrusion 401 and the limiting groove 301 are both in an annular structure, and the limiting protrusion 401 is inserted into the limiting groove 301 in a matching manner, so that the insulating gasket 3 can be conveniently stacked on the bottom of the steel shell 4, and the possibility that the insulating gasket 3 is displaced in the horizontal direction relative to the steel shell 4 can be reduced.

Specifically, limiting protrusion 401 is a convex arc structure, limiting groove 301 is a concave arc structure, and sharp edges and corners existing in limiting protrusion 401 and limiting groove 301 are prevented from cutting off first negative electrode tab 205.

As a preferred technical scheme, the periphery of the winding core 2 is further provided with an insulating adhesive tape, one side face of the insulating adhesive tape is bonded with the winding core 2, and the side face of the winding core 2 away from the insulating adhesive tape is bonded with the side wall of the steel shell 4. The periphery of the winding core 2 is bonded with the side wall of the steel shell 4 through the insulating adhesive tape, the winding core 2 is firmly fixed in the steel shell 4, the winding core 2 is prevented from rotating or moving up and down in the steel shell 4 under the vibrating environment, and the anti-vibration performance of the battery capacitor is further enhanced.

Specifically, the insulating tapes are provided in a plurality of annular structures, each extending in the height direction of the winding core 2, or in a strip-shaped structure, each extending in the circumferential direction of the winding core 2.

And when the battery capacitor is subjected to bottom point welding, a welding needle with the diameter of 1.50mm is adopted for welding. The method comprises the steps of firstly confirming the smoothness and the flatness of the outer surface of a welding pin before welding, ensuring that the outer surface of the welding pin has no sharp edge and has no inclined abrasion, and meanwhile confirming a welding seat to ensure the smoothness and the flatness of the surface of the welding seat. Then the welding parameters (including welding time and welding current) of the welding motor are adjusted, the welding needle is inserted into the central hole 208 of the winding core 2, then the whole battery capacitor is placed on the welding seat, the battery capacitor is kept still on the welding seat, a 'start' button of welding is clicked, and after the set welding time is reached, the battery capacitor is taken out of the welding seat, and the bottom spot welding operation of the battery capacitor is completed.

In the description herein, it is to be understood that the terms "upper," "lower," "left," "right," and the like are used in an orientation or positional relationship based on what is shown in the drawings for convenience of description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be considered limiting. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be appropriately combined to form other embodiments as will be appreciated by those skilled in the art.

The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.

Claims

1. The utility model provides an anti vibration battery capacitor, its characterized in that, includes the steel can, rolls up core, block subassembly and insulating gasket, the steel can has top opening, the bottom confined chamber that holds, roll up the core set up in hold the intracavity, insulating gasket sets up roll up between the core with the bottom of steel can, roll up the core including positive plate, first diaphragm, negative pole piece and the second diaphragm of superpose in proper order, the width of first diaphragm with the second diaphragm all is greater than the width of positive plate with the negative pole piece, and first diaphragm with the second diaphragm respectively bulge in positive plate with negative pole piece forms the bulge, the block subassembly seals at the open end of steel can, and the block subassembly is close to the one end that holds the chamber with the bulge butt, the bottom of rolling up the core is provided with the negative pole ear, the negative pole ear with the negative pole piece is connected, just the both ends of negative pole ear are followed respectively roll up the radial direction of core and extend, form first negative pole ear and second negative pole ear respectively, first negative pole ear passes insulating pad with the bottom welding of box hat, second negative pole ear orientation the open end of box hat after buckling with the lateral wall welding of box hat.

2. The vibration resistant battery capacitor of claim 1, wherein the length of the second negative tab is greater than the length of the first negative tab, and an end of the second negative tab distal from the first negative tab extends to the open end of the steel can.

3. The vibration resistant battery capacitor of claim 2, wherein the first negative tab has a length of 11.00-13.00 mm and the second negative tab has a length of 51.00-53.00 mm.

4. The vibration resistant battery capacitor of claim 2 wherein said first negative tab includes a first weld region and a first non-weld region, said first weld region being welded to the bottom of said can, said second negative tab includes a second weld region and a second non-weld region, said second weld region being welded to the sidewall of said can, the outer surface of said first non-weld region and the outer surface of said second non-weld region each being coated with a high temperature glue layer.

5. The vibration resistant battery capacitor of claim 4 wherein said insulating spacer has a tab through hole formed therethrough, said first negative tab passing through said tab through hole and being welded to the bottom of said steel can.

6. The vibration resistant battery capacitor of claim 5 wherein a locating hole is formed through the center of the insulating spacer for assisting in locating the first weld region at the bottom of the steel can, the tab through hole is spaced from the locating hole, and the center line of the locating hole coincides with the center line of the center hole of the roll core.

7. The anti-vibration battery capacitor as claimed in claim 1, wherein the lower surface of the insulating spacer is concavely provided with a limiting groove, the bottom of the steel shell is convexly provided with a limiting bulge towards the limiting groove, the limiting bulge and the limiting groove are both in annular structures, and the limiting bulge is fittingly inserted into the limiting groove;

or the like, or, alternatively,

8. The vibration resistant battery capacitor of claim 5, wherein the length of the protrusion is greater than 4.00 mm.

9. The vibration resistant battery capacitor of claim 8, wherein the difference between the inner diameter of the steel can and the outer diameter of the rolled core is 0.30-0.05 mm.

10. The vibration resistant battery capacitor of claim 8, wherein the outer periphery of the roll core is further provided with an insulating tape, one side of the insulating tape is bonded with the roll core, and the side of the insulating tape away from the roll core is bonded with the side wall of the steel can.