CN115986341A - Assembly structure of current collecting disc and cover cap, sealing assembly method and battery - Google Patents
Assembly structure of current collecting disc and cover cap, sealing assembly method and battery Download PDFInfo
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- CN115986341A CN115986341A CN202211477696.8A CN202211477696A CN115986341A CN 115986341 A CN115986341 A CN 115986341A CN 202211477696 A CN202211477696 A CN 202211477696A CN 115986341 A CN115986341 A CN 115986341A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention relates to the technical field of battery structures, in particular to an assembly structure of a current collecting disc and a cap, a sealing assembly method and a battery, wherein the assembly structure comprises the current collecting disc, a cap assembly and a self-plugging rivet; the bulge of the current collecting disc is arranged in the liquid injection hole in a penetrating mode, and the self-plugging rivet is arranged in the bulge of the current collecting disc in a penetrating mode and enables the current collecting disc and the cap assembly to be connected in an extruding mode and seals the liquid injection hole. The invention also relates to an assembly method of the structure and a battery comprising the structure, wherein a current collecting plate connecting sheet is cancelled, the current collecting plate is connected with the cap by the rivet capable of pulling core, and the rivet is subjected to core pulling operation at the later stage, so that the connection can be realized, the liquid injection hole can be sealed, the high-rate charge and discharge performance of the battery is improved, the sealing mode of the liquid injection hole can be simplified, and the liquid injection efficiency is improved.
Description
Technical Field
The invention relates to the technical field of battery structures, in particular to an assembly structure of a current collecting disc and a cap, a sealing assembly method and a battery.
Background
The battery is divided into positive and negative electrodes, the pole lugs are metal conductors leading out the positive and negative electrodes from the battery core, the common battery is provided with a positive electrode sheet and a negative electrode sheet respectively, one pole lug is arranged on each pole sheet and extends out for current conduction, the pole lugs are called as single-pole lugs, and most of the batteries are single-pole lugs. However, if only one tab is used, the internal resistance is too large during heavy current charging and discharging, so that two tabs, even multiple tabs or full tabs are used in some cases. The existing quick-charging battery uses all tabs (the edge of a pole piece is just a current collector and is also used as a tab which is better than a multi-tab) so as to deal with the use of quick charge and discharge.
In the existing steel shell full-lug structure, the positive electrode needs to be led out by a current collecting disc and then welded with a cap. The current positive current collecting disc is of a structure with a connecting sheet, and is connected with a cap through laser welding of the connecting sheet, so that current is led out of the battery. Although the structure has better multiplying power charging and discharging performance than a single-pole lug structure and a multi-pole lug structure, the structure still cannot be quickly charged and quickly discharged with large multiplying power due to the size of the connecting sheet.
In addition, in the existing structure, the sealing mode of the battery liquid injection hole is divided into two modes, one mode is a mode of pressing a steel ball in, and the other mode is a mode of welding a sealing nail by laser. The steel ball is pressed in, the liquid injection hole is required to be small, and the liquid injection efficiency is low for a large-size battery; the mode of laser welding seal nail, the use is comparatively general, but laser welding equipment input is higher, and production procedure is comparatively loaded down with trivial details.
In view of the above problems of the conventional structure, a new structure is urgently needed to improve the high-rate charge and discharge performance of the battery, simplify the sealing manner of the liquid injection hole, and improve the liquid injection efficiency.
Disclosure of Invention
The invention provides an assembly structure of a current collecting plate and a cap, a sealing assembly method and a battery, which are used for improving the high-rate charge and discharge performance of the battery, simplifying the sealing mode of a liquid injection hole and improving the liquid injection efficiency.
The invention provides an assembly structure of a current collecting disc and a cap, which comprises the current collecting disc, the cap assembly and a self-plugging rivet, wherein the middle part of the current collecting disc is provided with a bulge part with a through hole, and the middle part of the cap assembly is provided with a liquid injection hole;
the bulge of the current collecting disc is arranged in the liquid injection hole in a penetrating mode, and the self-plugging rivet is arranged in the bulge of the current collecting disc in a penetrating mode and enables the current collecting disc and the cap assembly to be connected in an extruding mode and seals the liquid injection hole.
The cap assembly comprises a cover plate assembly, a cap terminal and a fixing ring;
the nut cap terminal is of a flange-shaped structure, the upper part of the nut cap terminal is a disk body, the lower part of the nut cap terminal is a cylinder, the nut cap terminal is provided with the liquid injection hole which penetrates through the disk body and the cylinder, the cover plate assembly and the fixing ring are of an annular structure, the cover plate assembly and the fixing ring are sleeved on the cylinder, and the cover plate assembly is clamped between the disk body and the fixing ring; the fixed ring is back to the end face of the cover plate component and the end face of the column body are parallel and level.
The cover plate assembly comprises a cover plate, an inner insulation sheet and an outer insulation sheet;
the cover plate and the inner insulating sheet are both of annular structures, the inner insulating sheet is sleeved on the cylinder, the outer insulating sheet covers part of the edge of the disc body, the end face of the disc body, facing the cylinder, and the outer peripheral face, close to the disc body, of the cylinder, and the outer insulating sheet is in contact connection with the inner insulating sheet; the cover plate is sleeved outside the outer insulation sheet and is attached to the inner insulation sheet; the fixed ring is sleeved on the end part of the disc body, which faces away from the cylinder, and the fixed ring is attached to the inner insulating sheet.
The convex part of the flow collecting disc is divided into two parts, namely a convex inclined plane section and a convex straight section;
the protruding straight section is located annotate liquid downthehole portion and with annotate liquid downthehole wall laminating, annotate the lower part in liquid hole and expand into the chamfer outward, protruding inclined plane section is laminated with the chamfer of annotating liquid hole lower part.
The shape of the current collecting plate is matched with the shape of the cross section of the battery.
The upper part of the liquid injection hole is expanded into a sinking groove, and the size of the sinking groove is the same as that of the head of the self-plugging rivet; the self-plugging rivet is one of a closed self-plugging rivet, an inner locking wire drawing rivet and an outer locking wire drawing rivet, and the head of the self-plugging rivet is of a countersunk head type or a semicircular head type.
The current collecting disc, the cap terminal and the self-plugging rivet are made of aluminum or copper.
The invention also provides a sealing assembly method of the assembly structure of the current collecting disc and the cover cap, which is used for the battery assembly process and comprises the following steps:
the method comprises the following steps: welding the current collecting disc and the winding core together, and filling the current collecting disc and the winding core into a steel shell;
step two: assembling the cap assembly and the flow collecting disc, and enabling the bulge part of the flow collecting disc to penetrate into the liquid injection hole of the cap assembly;
step three: sealing and welding the battery, and then injecting liquid into the battery core;
step four: filling the self-plugging rivet into the cap assembly through a liquid injection hole of the cap assembly, and enabling the self-plugging rivet to penetrate through the convex part of the current collecting plate;
step five: performing core pulling operation on the self-plugging rivet to deform the bottom of the self-plugging rivet and expand the whole self-plugging rivet, wherein after the self-plugging rivet is deformed and expanded, the bulge part of the current collecting disc and the liquid injection hole of the cap assembly are extruded and connected, and the self-plugging rivet seals the liquid injection hole;
and after the fifth step is finished, performing laser welding sealing on the blind rivet in the liquid injection hole to form welding secondary sealing, and then performing a sixth step.
Step six: and carrying out pre-charging and grading and thermal shrinkage code spraying operation on the battery to finish the battery assembly and manufacture.
The invention also provides a battery, which comprises the assembly structure of the current collecting disc and the cap.
According to the assembly structure, the sealing assembly method and the battery of the current collecting disc and the cap, the current collecting disc is connected with the cap assembly through the middle bulge part without a connecting sheet structure, so that current is led out of the battery; through the deformation of the self-plugging rivet, the current collecting disc and the cap assembly are connected in an extruding manner, the flow area is obviously increased, and the high-rate charge and discharge performance of the battery is improved; meanwhile, the self-plugging rivet seals the liquid injection hole together, so that the laser welding times and the corresponding equipment investment are reduced, the sealing mode of the liquid injection hole is simplified, and the liquid injection efficiency is improved.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic overall view of an assembled structure of a current collecting plate and a cap in the present invention;
FIG. 2 is a schematic structural view of the cap assembly of the present invention;
fig. 3 is a schematic view of the structure of a current collecting plate according to the present invention.
Reference numerals:
1. a current collecting plate; 2. a cap assembly; 3. self-plugging rivets;
1-1, a convex inclined plane section; 1-2, a convex straight section;
2-1, injecting holes; 2-2, a cover plate; 2-3, an inner insulation sheet; 2-4, an external insulation sheet; 2-5, cap terminals; 2-6, fixing the ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
In the present invention, the front, back, up and down in the drawings are regarded as the front, back, up and down of the device in the operation process in the present specification.
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art.
Unless otherwise defined, terms used herein, including technical and scientific terms, have the ordinary meaning as understood by those skilled in the art. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Specific structures and methods of the present invention are described below in conjunction with fig. 1-3.
Aiming at solving two problems, one is to improve the high-rate charge-discharge performance of the battery, the other is to simplify the sealing mode of a liquid injection hole and improve the liquid injection efficiency, the invention provides an assembly structure of a current collecting disc and a cap, as shown in figures 1 and 2, the assembly structure comprises a current collecting disc 1, a cap assembly 2 and a self-plugging rivet 3, a bulge part with a through hole is arranged in the middle of the current collecting disc 1, and a liquid injection hole 2-1 is arranged in the middle of the cap assembly 2.
The bulge of the current collecting disc 1 is arranged in the liquid injection hole 2-1 in a penetrating mode, the self-plugging rivet 3 is arranged in the bulge of the current collecting disc 1 in a penetrating mode to enable the current collecting disc 1 and the cap assembly 2 to be connected in an extruding mode, and the liquid injection hole 2-1 is sealed.
In the battery assembling process, the current collecting disc 1 is not provided with a connecting piece structure and is mainly connected with the cap assembly 2 by virtue of the protruding part of the current collecting disc 1, current is led out of the battery, the liquid injection hole 2-1 of the cap assembly 2 is sealed by the self-plugging rivet 3, the current collecting disc 1 and the cap assembly 2 are extruded and connected by the self-plugging rivet 3 in the assembling process, the overflowing area is obviously increased, the high-rate charge and discharge performance of the battery can be improved, meanwhile, the liquid injection hole 2-1 is sealed by the self-plugging rivet 3, the laser welding frequency and the corresponding equipment investment are reduced, the sealing mode of the liquid injection hole is simplified, and the liquid injection efficiency is improved.
A specific structure of a cap assembly in an assembly structure of a current collecting disc and a cap is described in detail, and as shown in fig. 2, the cap terminal 2-5 is a flange-shaped structure, the upper portion is a disc body, the lower portion is a cylinder body, the cap terminal 2-5 is provided with the liquid injection hole 2-1 penetrating through the disc body and the cylinder body, the cover plate assembly and the fixing ring 2-6 are annular structures, the cover plate assembly and the fixing ring 2-6 are sleeved on the cylinder body, and the cover plate assembly is clamped between the disc body and the fixing ring 2-6; the end faces of the fixing rings 2-6, which face away from the cover plate assembly, are flush with the end faces of the columns.
The cover plate assembly comprises a cover plate 2-2, an inner insulation sheet 2-3 and an outer insulation sheet 2-4. The cover plate 2-2 and the inner insulating sheet 2-3 are both of annular structures, the inner insulating sheet 2-3 is sleeved on the cylinder, the outer insulating sheet 2-4 covers part of the edge of the disc body, the end face of the disc body facing the cylinder and the outer peripheral face of the disc body close to the cylinder, and the outer insulating sheet 2-4 is in contact with the inner insulating sheet 2-3; the cover plate 2-2 is sleeved outside the outer insulation sheet 2-4, the cover plate 2-2 is attached to the inner insulation sheet 2-3, the cover plate 2-2 is electrically insulated by the outer insulation sheet 2-4 and the inner insulation sheet 2-3, the cover plate 2-2 is cut off from the cap terminal 2-5, and the cover plate 2-2 is welded with a battery steel shell to form a battery seal. The fixing ring 2-6 is sleeved at the end part of the cylinder body, which is opposite to the disc body, the fixing ring 2-6 is attached to the inner insulation sheet 2-3, and the position of the inner insulation sheet 2-3 is fixed, so that the inner insulation sheet 2-3, the cover plate 2-2, the outer insulation sheet 2-4 and the cap terminal 2-5 are assembled into a whole to play the respective part of functions.
In the structure, the cap assembly 2 mainly has two functions, one is that the cap terminal 2-5 contained in the cap assembly is connected with the current collecting disc 1 through the liquid injection hole 2-1, so that the current can be led out of the battery by the current collecting disc 1 without a connecting sheet structure, and the other is that the cap plate 2-2 contained in the current collecting disc is welded with a steel shell to form a battery seal, which is a key step in the manufacturing process of the battery.
In combination with the above structure, the current collecting disc 1 is further described in detail herein, as shown in fig. 3, the convex portion of the current collecting disc 1 is divided into two parts, namely a convex inclined surface section 1-1 and a convex straight section 1-2; the convex straight section 1-2 is positioned in the liquid injection hole 2-1 and is attached to the inner wall of the liquid injection hole 2-1, the lower part of the liquid injection hole 2-1 is expanded into a chamfer, and the convex inclined section 1-1 is attached to the chamfer at the lower part of the liquid injection hole 2-1.
When the current collecting disc 1 and the cap assembly 2 are installed in a matched mode, the straight protruding section 1-2 of the current collecting disc 1 directly penetrates into the liquid injection hole 2-1, the inclined protruding section 1-3 is attached to the chamfer at the lower portion of the liquid injection hole 2-1 in a matched mode, the current collecting disc is installed in the liquid injection hole 2-1 of the cap assembly 2 through the self-plugging rivet 3, the protruding portion of the current collecting disc 1 is tightly extruded on the wall of the liquid injection hole 2-1 through the self-plugging rivet 3, and connection of the current collecting disc 1 and the cap assembly 2 is formed.
In the above structure, the current collecting disc 1 is described by the structural thought of a circular disc, but the current collecting disc 1 is not limited to a circular disc, the current collecting disc 1 may be a circular disc, or a square disc or a disc structure thereof, the shape of the current collecting disc 1 matches with the shape of the cross section of the battery, the shape is mainly determined according to the appearance requirement of the battery, and the current collecting disc 1 and the cap assembly 2 are the same as long as the internal connection structure is met.
The structure is further optimized, the upper part of the liquid injection hole 2-1 is expanded into a sinking groove, the size of the sinking groove is the same as that of the head of the blind rivet 3, and the blind rivet 3 is of a sinking head type or a semi-circular head type. The blind rivet 3 is one of a closed type blind rivet, an internal lock wire drawing rivet and an external lock wire drawing rivet, and other blind rivets with sealing functions can be used at the position.
After the current collecting disc 1, the cap assembly 2 and the blind rivet 3 are assembled, the blind rivet 3 is subjected to core pulling, the bottom of the blind rivet 3 begins to deform along with the core pulling of the blind rivet 3, the whole blind rivet is expanded, the current collecting disc 1 is extruded, the bottom of the deformed blind rivet 3 compacts and closely contacts a convex inclined plane section 1-3 of the current collecting disc 1 and a chamfer at the lower part of the liquid injection hole 2-1, and the bottom of the deformed blind rivet 3 forms sealing at the lower part of the liquid injection hole 2-1; the head of the blind rivet 3 is also closely contacted with the upper sunken groove of the liquid injection hole 2-1, and the sunken head type or the semi-circular head type of the blind rivet 3 forms a seal for the upper part of the liquid injection hole 2-1. Due to the deformation of the blind rivet 3, the flow collecting disc 1 and the cap assembly 2 are connected in an extrusion way, and the flow area is obviously increased.
The current collecting disc 1, the cap terminals 2-5 and the blind rivet 3 are made of aluminum or copper or other metal materials with good conductivity, the current collecting disc 1, the cap terminals 2-5 and the blind rivet 3 are main components of a conductive terminal, and the conductive efficiency can be improved by adopting the metal materials with good conductivity.
The invention also provides a sealing assembly method of the assembly structure of the current collecting disc and the cover cap, which is used in the battery assembly process, the sealing assembly method and the device can be correspondingly referred to each other, wherein the original parts and the operation processes of a winding core, a steel shell, an electric core, a battery sealing, a battery pre-charging capacity grading, a thermal shrinkage code spraying and the like used in the battery assembly process are the existing mature structures or technologies and are not described herein any more, and the sealing assembly method of the assembly structure of the current collecting disc and the cover cap comprises the following steps:
the method comprises the following steps: and welding the current collecting disc 1 and the winding core together, and filling the current collecting disc and the winding core into a steel shell.
Step two: and assembling the cap assembly 2 and the current collecting disc 1, and enabling the bulge part of the current collecting disc 1 to penetrate into the liquid injection hole 2-1 of the cap assembly 2.
Step three: and sealing and welding the battery, and then injecting liquid into the battery core.
Step four: and (3) filling the blind rivet 3 from a liquid injection hole 2-1 of the cap component 2, enabling the blind rivet 3 to penetrate through the convex part of the current collecting disc 1, and enabling the top of the blind rivet 3 to be flush with the top of the cap component 2.
Step five: and (3) performing core pulling operation on the blind rivet 3 to deform the bottom of the blind rivet 3 and expand the whole blind rivet, extruding the bulge part of the current collecting disc 1 and the liquid injection hole 2-1 of the cap assembly 2 to be tightly attached after the blind rivet 3 deforms and expands, and sealing the liquid injection hole 2-1 by the blind rivet 3.
Step six: and carrying out pre-charging and grading and thermal shrinkage code spraying operation on the battery to finish the battery assembly and manufacture.
Preferably, after the sealing operation in the fifth step is completed, the blind rivet 3 is subjected to laser welding sealing in the liquid injection hole 2-1 to form secondary welding sealing, the two sealing modes are used simultaneously, the sealing effect can be enhanced, and the step can be selected to be used or not used in consideration of equipment cost.
The sealing assembly method is specifically applied to complete a battery preparation process, and the specific preparation process is as follows:
the materials were prepared as follows: the thickness of the current collecting disc is 0.3mm, and the diameter is phi 44mm; the outer diameter of the upper section of the middle bulge of the current collecting disc is phi 4.6mm, and the height is 1.9mm; the middle hole is phi 4.0mm; the inclination of the lower section is 45 degrees, and the height is 1.0mm; the diameter of the cap is phi 46mm, the diameter of the upper section of the inner hole of the middle terminal is phi 8.4mm, the height is 1.2mm, and the inclination is 120 degrees; the diameter of the middle section is phi 4.6mm, and the height is 1.9mm; the inclination of the lower section is 45 degrees, and the height is 1.0mm; the blind rivet is a closed rivet, the appearance of a countersunk head is realized, and the outer diameter of the head part is phi 8.2mm; the diameter of the lower part is phi 4.0mm, and the height is 6.0mm; the material of the current collecting plate, the cap terminal and the blind rivet is pure aluminum with the brand number 1060.
The first step is as follows: and welding the current collecting disc and the winding core, wherein the concentricity of the current collecting disc and the winding core is required to be +/-0.1 mm.
The second step is that: the winding core is put into the shell, the negative electrode faces the shell, and the convex part of the current collecting disc faces upwards.
The third step: assembling the cap assembly, assembling the cap assembly and the flow collecting disc, and enabling the projection part on the flow collecting disc to penetrate through the liquid injection hole on the cap assembly.
The third step: sealing and welding, and performing laser penetration welding on the negative electrode.
The fourth step: and injecting liquid into the battery cell through a liquid injection hole in the cap assembly.
The fifth step: and (4) filling the blind rivet into a liquid injection hole on the cap component, and then performing blind rivet pulling on the blind rivet by using a rivet gun to complete sealing of the liquid injection hole.
And a sixth step: and carrying out the working procedures of pre-charging and grading, thermal shrinkage code spraying and the like on the battery, and finishing the manufacturing of the battery.
The invention also provides a battery which comprises the assembly structure of the current collecting disc and the cover cap or is prepared by adopting the sealing assembly method.
In conclusion, according to the assembly structure of the current collecting disc and the cap, the seal assembly method and the battery, provided by the invention, the current collecting disc connecting sheet is eliminated, the current collecting disc and the cap are connected by the rivet, the liquid injection hole can be sealed while the connection is carried out, the high-rate charge and discharge performance of the battery is improved, the sealing mode of the liquid injection hole can be simplified, and the liquid injection efficiency is improved.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides an assembly structure of current collection dish and block, includes current collection dish (1), block subassembly (2) and self-plugging rivet (3), its characterized in that: the middle part of the flow collecting disc (1) is provided with a bulge part with a through hole, and the middle part of the cap assembly (2) is provided with a liquid injection hole (2-1);
the bellying of current collecting dish (1) is worn to establish annotate in liquid hole (2-1), self-plugging rivet (3) are worn to establish in the bellying of current collecting dish (1) will current collecting dish (1) with cap subassembly (2) extrusion links to each other, and right annotate liquid hole (2-1) formation and seal.
2. The assembly structure of a collecting plate and a cap according to claim 1, wherein: the cap assembly (2) comprises a cover plate assembly, cap terminals (2-5) and fixing rings (2-6);
the nut cap terminal (2-5) is of a flange-shaped structure, the upper part of the nut cap terminal is a disk body, the lower part of the nut cap terminal is a cylinder body, the nut cap terminal (2-5) is provided with a liquid injection hole (2-1) penetrating through the disk body and the cylinder body, the cover plate component and the fixing ring (2-6) are of an annular structure, the cover plate component and the fixing ring (2-6) are sleeved on the cylinder body, and the cover plate component is clamped between the disk body and the fixing ring (2-6); the end face, back to the cover plate component, of the fixing ring (2-6) is flush with the end face of the column body.
3. The assembly structure of a collecting plate and a cap according to claim 2, wherein: the cover plate assembly comprises a cover plate (2-2), an inner insulation sheet (2-3) and an outer insulation sheet (2-4);
the cover plate (2-2) and the inner insulation sheet (2-3) are both of annular structures, the inner insulation sheet (2-3) is sleeved on the cylinder, the outer insulation sheet (2-4) covers part of the edge of the disc body, the end face of the disc body facing the cylinder and the outer peripheral face of the cylinder body close to the disc body, and the outer insulation sheet (2-4) is in contact with the inner insulation sheet (2-3); the cover plate (2-2) is sleeved outside the outer insulation sheet (2-4), and the cover plate (2-2) is attached to the inner insulation sheet (2-3); the fixing ring (2-6) is sleeved at the end part of the disc body, which is back to the cylinder, and the fixing ring (2-6) is attached to the inner insulating sheet (2-3).
4. The assembly structure of a current collecting plate and a cap according to claim 1, 2 or 3, wherein: the convex part of the collecting plate (1) is divided into two parts, namely a convex inclined plane section (1-1) and a convex straight section (1-2);
the convex straight section (1-2) is positioned in the liquid injection hole (2-1) and is attached to the inner wall of the liquid injection hole (2-1), the lower part of the liquid injection hole (2-1) is expanded into a chamfer, and the convex inclined section (1-1) is attached to the chamfer at the lower part of the liquid injection hole (2-1).
5. The assembly structure of a manifold plate and a cap according to claim 4, wherein: the shape of the current collecting disc (1) is matched with the shape of the cross section of the battery.
6. The assembly structure of a manifold plate and a cap according to claim 4, wherein: the upper part of the liquid injection hole (2-1) is expanded into a sinking groove, and the size of the sinking groove is the same as that of the head of the self-plugging rivet (3); the self-plugging rivet (3) is one of an enclosed self-plugging rivet, an internal locking wire drawing rivet and an external locking wire drawing rivet, and the head of the self-plugging rivet (3) is of a countersunk head type or a semi-circular head type.
7. The assembly structure of a current collecting plate and a cap according to claim 2, wherein: the current collecting disc (1), the cap terminals (2-5) and the blind rivet (3) are made of aluminum or copper.
8. A seal assembling method of an assembling structure of a current collecting plate and a cap according to any one of claims 1 to 7, which is used in a battery assembling process, characterized in that: comprises the following steps of (a) preparing a solution,
the method comprises the following steps: welding the current collecting disc (1) and the winding core together, and filling the current collecting disc and the winding core into a steel shell;
step two: assembling the cap assembly (2) and the collecting disc (1) to enable the bulge part of the collecting disc (1) to penetrate into the liquid injection hole (2-1) of the cap assembly (2);
step three: sealing and welding the battery, and then injecting liquid into the battery core;
step four: the self-plugging rivet (3) is loaded from a liquid injection hole (2-1) of the cap assembly (2), and the self-plugging rivet (3) penetrates through a protruding part of the current collecting disc (1);
step five: performing core pulling operation on the self-plugging rivet (3), so that the bottom of the self-plugging rivet (3) is deformed and the whole self-plugging rivet is expanded, after the self-plugging rivet (3) is deformed and expanded, the bulge part of the current collecting disc (1) and the liquid injection hole (2-1) of the cap assembly (2) are extruded and connected, and the self-plugging rivet (3) seals the liquid injection hole (2-1);
step six: and carrying out pre-charging and grading and thermal shrinkage code spraying operation on the battery to finish the battery assembly and manufacture.
9. The method of sealingly assembling an assembled structure of a collecting plate and a cap according to claim 8, wherein: and after the fifth step is finished, performing laser welding sealing on the blind rivet (3) in the liquid injection hole (2-1) to form secondary welding sealing, and then performing a sixth step.
10. A battery, characterized by: an assembled structure comprising the collecting plate and the cap as claimed in any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211477696.8A CN115986341A (en) | 2022-11-23 | 2022-11-23 | Assembly structure of current collecting disc and cover cap, sealing assembly method and battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211477696.8A CN115986341A (en) | 2022-11-23 | 2022-11-23 | Assembly structure of current collecting disc and cover cap, sealing assembly method and battery |
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| CN115986341A true CN115986341A (en) | 2023-04-18 |
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| CN202211477696.8A Pending CN115986341A (en) | 2022-11-23 | 2022-11-23 | Assembly structure of current collecting disc and cover cap, sealing assembly method and battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116683134A (en) * | 2023-08-03 | 2023-09-01 | 中自环保科技股份有限公司 | Explosion-proof structure of jumbo size cylinder battery |
-
2022
- 2022-11-23 CN CN202211477696.8A patent/CN115986341A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116683134A (en) * | 2023-08-03 | 2023-09-01 | 中自环保科技股份有限公司 | Explosion-proof structure of jumbo size cylinder battery |
| CN116683134B (en) * | 2023-08-03 | 2023-10-24 | 中自环保科技股份有限公司 | Explosion-proof structure of cylindrical battery |
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