CN214754075U - Top cover structure of power battery and power battery - Google Patents
Top cover structure of power battery and power battery Download PDFInfo
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- CN214754075U CN214754075U CN202120514137.4U CN202120514137U CN214754075U CN 214754075 U CN214754075 U CN 214754075U CN 202120514137 U CN202120514137 U CN 202120514137U CN 214754075 U CN214754075 U CN 214754075U
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 10
- 229910052782 aluminium Inorganic materials 0.000 description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 8
- 239000010949 copper Substances 0.000 description 8
- 229910052802 copper Inorganic materials 0.000 description 8
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- 238000010008 shearing Methods 0.000 description 2
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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 utility model belongs to the technical field of battery production and manufacture, in particular to a top cover structure of a power battery and the power battery, which comprises a top cover plate (1); a first plastic part (2) is arranged between the conductive block (3) and the top cover plate (1); the top cover plate (1), the first plastic part (2) and the conductive block (3) are fixedly connected through a blind rivet (7). The utility model discloses a structure of self-plugging rivet utmost point post helps reduce cost, can also improve the security of battery.
Description
Technical Field
The utility model belongs to the technical field of the battery production is made, concretely relates to power battery's top cap structure and power battery.
Background
Nowadays, with the development of modern society and the enhancement of environmental awareness of people, more and more devices select a lithium battery as a power supply, such as a mobile phone, a notebook computer, an electric tool, an electric automobile and the like, which provides a wide space for the application and development of the lithium battery. Among them, lithium batteries used in electric tools, electric vehicles, and the like are generally called power batteries. The structure of the friction welding pole of the power battery is widely used in the arrangement of a top cover of the power battery all the time, and under the normal condition, the negative pole consists of two base materials of copper and aluminum, namely friction welding or a composite plate.
However, in the existing battery pole structure, the cathode pole is formed by friction welding or a composite plate, the processing is complex and the cost is high, and the contact surfaces of the two substrates are in different environments, so that the failure risk exists, the overcurrent capacity or air leakage of the product is seriously influenced, and the product is scrapped.
SUMMERY OF THE UTILITY MODEL
One of the purposes of the utility model lies in: aiming at the defects of the prior art, the top cover structure of the power battery is provided, the structure of the self-plugging rivet pole is adopted, the cost is reduced, and the safety of the battery can be improved.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a top cover structure of a power battery comprises a top cover plate; a first plastic part is arranged between the conductive block and the top cover plate; the top cover plate, the first plastic part and the conductive block are fixedly connected through a blind rivet.
Preferably, the top cover plate, the first plastic part and the conductive block are respectively provided with a first through hole, a second through hole and a third through hole communicated with the first through hole, and the blind rivet sequentially penetrates through the first through hole, the second through hole and the third through hole.
Preferably, the self-plugging rivet comprises a riveting core and a rivet cap sleeved at the end part of the riveting core, a first clamping part is arranged at the peripheral edge of one end of the rivet cap, and a second clamping part is formed at the other end of the rivet cap after the self-plugging rivet is pulled out and protrudes towards the periphery.
Preferably, the top of the conductive block is provided with a third groove, the first clamping portion is embedded in the third groove, the first plastic part is provided with a second groove, the conductive block is embedded in the second groove, the top cover plate is provided with a first groove, and the first plastic part is embedded in the first groove.
Preferably, the first through hole is arranged in the first groove, the bottom surface of the first plastic part is in concave-convex fit with the first groove, the second through hole is aligned with the first through hole, the second through hole is arranged in the second groove, and the bottom surface of the conductive block is in concave-convex fit with the second groove, the third through hole is aligned with the second through hole.
Preferably, the pole structure further comprises a second plastic part, the second plastic part is fixed to the bottom of the top cover plate through concave-convex matching, the second plastic part is provided with a fourth through hole for the blind rivet to penetrate through, and the diameter of the fourth through hole is smaller than or equal to that of the first through hole.
Preferably, a sealing ring is arranged between the second plastic part and the blind rivet, the sealing ring is provided with a protrusion, the protrusion surrounds the inside of the first through hole, the protrusion abuts against the bottom of the first plastic part, and the fourth through hole surrounds the edge of the sealing ring.
Preferably, the post structure further comprises a connecting piece, a fourth groove is formed in the bottom of the second plastic part, the connecting piece is embedded in the fourth groove, a fifth through hole for the self-plugging rivet to penetrate through is formed in the connecting piece, a pin and a notch are formed in the end portion of the connecting piece, the pin is used for connecting a tab of an electric core, and a concave portion matched with the notch is formed in the second plastic part.
Preferably, the material of the nail cap and the material of the connecting piece are the same as the current collecting material of the pole piece of the battery cell electrically connected with the nail cap.
Preferably, still be provided with on the top cap piece and annotate at least one kind in liquid hole and the explosion-proof valve hole, it seals through self-plugging rivet to annotate the liquid hole, the protection film is installed at the top of explosion-proof valve hole, explosion-proof valve is installed to the bottom of explosion-proof valve hole.
A second object of the present invention is to provide a power battery, which comprises a casing having an opening; the battery cell is accommodated in the shell; according to the top cover structure of the power battery, the top cover sheet is fixed to the opening and used for sealing the battery core in the shell.
The utility model has the advantages that the utility model comprises a top cover plate; a first plastic part is arranged between the conductive block and the top cover plate; the top cover plate, the first plastic part and the conductive block are fixedly connected through a blind rivet. In the existing battery pole structure, the negative pole column is composed of two base materials of copper and aluminum, namely a friction welding or composite plate, the processing is complex and high in cost, the contact surfaces of the two base materials are in different environments, failure risks exist, the overcurrent capacity or air leakage of a product are seriously influenced, and the product is scrapped, so that a first through hole, a second through hole and a third through hole are respectively arranged on the top cover plate, the first plastic part and the conducting block, the first through hole is communicated with the second through hole and the third through hole, the top cover plate, the first plastic part and the conducting block are fixedly connected by adopting the self-plugging rivet, the riveting core is pulled by a riveting gun in the riveting process, the top cover plate, the first plastic part and the conducting block are connected by self deformation or interference, the riveting body is expanded, the riveting effect is achieved, meanwhile, the head of the riveting core is locked inside the rivet cap, and the tail of the rivet cap is pulled and riveted by the first through hole, The outside of second through-hole and third through-hole, and first through-hole or third through-hole are sealed totally by the nail cap, and this kind of utmost point post structure not only has high shear force, antivibration, high pressure resistant characteristics, can also fasten utmost point post, guarantees sealed and overflows and the pulling force effect to improve electric core product quality. The utility model discloses a structure of self-plugging rivet utmost point post helps reduce cost, can also improve the security of battery.
Drawings
Features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.
Fig. 2 is an exploded view of a first embodiment of the present invention.
Fig. 3 is a schematic cross-sectional view of a first pole according to a first embodiment of the present invention before installation.
Fig. 4 is a schematic cross-sectional view of a second pole of the first embodiment of the present invention before installation.
Fig. 5 is a schematic cross-sectional view of the first pole before core pulling according to the first embodiment of the present invention.
Fig. 6 is a schematic cross-sectional view of a second pole piece according to a first embodiment of the present invention before core pulling.
Fig. 7 is a schematic cross-sectional view of the first pole post after core pulling according to the first embodiment of the present invention.
Fig. 8 is a schematic cross-sectional view of a second pole post according to a first embodiment of the present invention after core pulling.
Fig. 9 is a schematic structural view of a blind rivet according to a first embodiment of the present invention.
Wherein the reference numerals are as follows:
1-top cover sheet; 11-a first via; 12-a first groove; 13-liquid injection hole; 14-explosion-proof valve hole; 141-a protective film; 142-an explosion-proof valve;
2-a first plastic part; 21-a second via; 22-a second groove;
3-a conductive block; 31-a third via; 32-a third groove;
4-a second plastic part; 41-fourth via; 42-a fourth groove;
5-a connector; 51-a fifth via; 52-pin; 53-notch;
6-sealing ring; 61-projection;
7-self-plugging rivets; 71-riveting a core; 72-nail cap; 721-a first card section; 722-second card portion.
Detailed Description
As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.
Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, detachable connections, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The present invention will be described in further detail with reference to fig. 1 to 9, but the present invention is not limited thereto.
Implementation mode one
A top cover structure of a power battery comprises a top cover plate 1; a first plastic part 2 is arranged between the conductive block 3, the conductive block 3 and the top cover plate 1; wherein, top cap piece 1, first plastic part 2 and conducting block 3 pass through blind rivet 7 fixed connection.
In the existing battery post structure, the negative post is composed of two base materials of copper and aluminum, i.e. friction welding or composite plate, the processing is complex and the cost is high, and the contact surfaces of the two base materials have failure risks under different environments, which seriously affect the overcurrent capacity or air leakage of the product and cause the product to be scrapped, therefore, as shown in fig. 1 to 9, the top cover plate 1, the first plastic part 2 and the conducting block 3 are respectively provided with a first through hole 11, a second through hole 21 and a third through hole 31, the first through hole 11 is communicated with the second through hole 21 and the third through hole 31, and a self-plugging rivet 7 is adopted to fixedly connect the top cover plate 1, the first plastic part 2 and the conducting block 3, during the riveting process, the riveting core 71 is pulled by a riveting gun to connect the top cover plate 1, the first plastic part 2 and the conducting block 3 by self deformation or interference, so that the riveting body is expanded to play a riveting role, and simultaneously, the head of the riveting core 71 is locked inside the rivet cap 72, the tail of the nail cap 72 is pulled and riveted outside the first through hole 11, the second through hole 21 and the third through hole 31, and the first through hole 11 or the third through hole 31 is completely sealed by the nail cap 72, so that the pole structure not only has the characteristics of high shearing force, vibration resistance and high pressure resistance, but also can fasten poles, and the sealing, overcurrent and tensile force effects are ensured, thereby improving the quality of the electric core product.
Specifically, the top cover plate 1, the first plastic part 2 and the conductive block 3 are respectively provided with a first through hole 11, a second through hole 21 communicated with the first through hole 11 and a third through hole 31, and the blind rivet 7 sequentially penetrates through the first through hole 11, the second through hole 21 and the third through hole 31.
In the utility model discloses an in the top cap structure of power battery, self-plugging rivet 7 is including riveting core 71 and the cover at the nut 72 of riveting core 71 tip, and the periphery border of the one end of nut 72 is provided with first card portion 721, and the other end of nut 72 forms second card portion 722 to protruding 61 formation in periphery after the loose core. Specifically, the nut 72 cover is in the outside of riveting core 71, the periphery border of the one end of nut 72 is provided with first card portion 721, first card portion 721 can with the joint of conducting block 3, play the effect of fixed nut 72 tip, and after the core 71 is riveted in the riveter pulling, the head of riveting core 71 is died inside nut 72 by the lock, make the other end of nut 72 to the protruding second card portion 722 that forms in periphery, second card portion 722 can with the bottom joint of top sheet 1, the realization is with top sheet 1, first plastic part 2 and conducting block 3 are fixed together, avoid top sheet 1, first plastic part 2 or conducting block 3 take place the displacement or rock, help improving utmost point post structure's stability. The self-plugging rivet 71 is of a closed structure, the rivet cap 72 and the rivet core 71 are made of copper or aluminum, and the rivet cap 72 is provided with round heads, countersunk heads, large cap edges and the like; it is also possible to design the end with a cap, in the riveting, the rivet core 71 being pulled by the riveter.
The battery in this embodiment has two poles, namely a first pole and a second pole, which are all disposed on the top cover plate 1, the first pole can be a positive pole or a negative pole, and correspondingly, the second pole is a negative pole or a positive pole. Specifically, first utmost point post is as anodal, and the second utmost point post is as the negative pole, and first plastic part 2 can all adopt insulating plastic, helps improving the production efficiency of first plastic part 2, still does benefit to the first plastic part 2 of mass production, reduces the manufacturing cost of first plastic part 2. Wherein, first plastic part 2 is formed by PPS material or PSU material, and PPS material, PSU material all have high temperature resistant, corrosion-resistant, superior mechanical properties and insulating properties, help improving the life of first plastic part 2 to improve the quality of battery.
According to the utility model discloses an among the top cap structure of power battery, the top of conducting block 3 is provided with third recess 32, and first card portion 721 inlays in third recess 32, and first plastic part 2 is provided with second recess 22, and conducting block 3 inlays in second recess 22, and top sheet 1 is provided with first recess 12, and first plastic part 2 inlays in first recess 12. In this embodiment, the top of conducting block 3 is equipped with third recess 32, blind rivet 7 is stretching into first through-hole 11 in-process, first card portion 721 just inlays on third recess 32, can prevent that blind rivet 7 from continuing the condition of down moving by the influence of gravity, conducting block 3 inlays in second recess 22 of first plastic part 2, not only can prevent that conducting block 3 from taking place the displacement on the horizontal direction, prevent that conducting block 3 from coming off from first plastic part 2, still help reducing the holistic height of top cap structure, and simultaneously, first plastic part 2 inlays first recess 12 on top cap piece 1, not only play the effect of injecing first plastic part 2 position on top cap piece 1, can also improve the steadiness between first plastic part 2 and the top cap piece 1, reduce the probability that first plastic part 2 takes place to come off, realize the effect of fastening utmost point post.
According to the utility model discloses an among the top cap structure of power battery, first through-hole 11 sets up in first recess 12, the unsmooth cooperation of bottom surface and first recess 12 of first plastic part 2 for aim at first through-hole 11 with second through-hole 21, second through-hole 21 sets up in second recess 22, the unsmooth cooperation of bottom surface and second recess 22 of conducting block 3, is used for aiming at second through-hole 21 with third through-hole 31. In this embodiment, a first through hole 11 and a plurality of convex bodies and/or concave bodies are provided in the first groove 12, a concave body and/or a convex body matched with the convex body and/or concave body is provided on the bottom surface of the first plastic part 2, and it is only necessary to match the bottom surface of the first plastic part 2 with the first groove 12 in a concave-convex manner, so as to align the second through hole 21 with the first through hole 11, and similarly, the second groove 22 is provided with the second through hole 21 and a plurality of convex bodies and/or concave bodies, correspondingly, the bottom surface of the conductive block 3 is provided with the concave body and/or convex body matched with the convex body and/or concave body, it is only necessary to match the bottom surface of the conductive block 3 with the second groove 22 in a concave-convex manner, and it is realized to align the third through hole 31 with the second through hole 21.
According to the utility model discloses an among power battery's the top cap structure, utmost point post structure still includes second plastic part 4, and second plastic part 4 is fixed in the bottom of top cap piece 1 through unsmooth cooperation, and second plastic part 4 is provided with the fourth through-hole 41 that supplies self-plugging rivet 7 to pass, and the diameter of fourth through-hole 41 is less than or equal to the diameter of first through-hole 11. Increase second plastic part 4, can separate connecting piece 5 and top cap piece 1, avoid top cap piece 1 to be connected with connecting piece 5 electricity, lead to positive negative utmost point post to switch on and take place the battery short circuit, increase fourth through hole 41, make self-plugging rivet 7 also can pass second plastic part 4, realize with top cap piece 1, first plastic part 2, conducting block 3 and 4 fixed connection of second plastic part, help reducing the probability that second plastic part 4 takes place to loosen, still help improving the sealing performance of utmost point post structure.
According to the utility model discloses an among the top cap structure of power battery, still be provided with on the top cover plate 1 and annotate at least one in liquid hole 13 and the explosion-proof valve opening 14, annotate liquid hole 13 and seal through self-plugging rivet 7, protection film 141 is installed at the top of explosion-proof valve opening 14, and explosion-proof valve 142 is installed to the bottom of explosion-proof valve opening 14. Increase and annotate liquid hole 13, be convenient for pour into battery with electrolyte inside, explosion-proof valve 142 can make the automatic quick pressure release of battery, avoids the battery explosion to lead to the incident to take place when the battery rises owing to overcharge, overdischarge, overflow and the inside short circuit of battery lead to the battery, and wherein, explosion-proof valve hole 14 cooperation protection film 141 ensures that explosion-proof valve 142's function can realize, and protection film 141 can prevent that outside dust, water or other impurity from getting into explosion-proof valve 142. The liquid injection hole 13 can also be sealed by the blind rivet 7 instead of a sealing nail, which is helpful for improving the sealing performance of the liquid injection hole 13, and the riveting process of the blind rivet 7 is the same as that of the blind rivet 7.
The utility model discloses a theory of operation is:
the top cover plate 1, the first plastic part 2 and the conductive block 3 are respectively provided with a first through hole 11, a second through hole 21 and a third through hole 31, the first through hole 11 is communicated with the second through hole 21 and the third through hole 31, and a self-plugging rivet 7 is adopted to fixedly connect the top cover plate 1, the first plastic part 2 and the conductive block 3, in the riveting process, a rivet gun pulls a rivet core 71, the top cover plate 1, the first plastic part 2 and the conductive block 3 are connected by self deformation or interference, the rivet body is expanded to achieve the riveting effect, meanwhile, the head of the rivet core 71 is locked inside a rivet cap 72, the tail of the rivet cap 72 is pulled and riveted outside the first through hole 11, the second through hole 21 and the third through hole 31, and the first through hole 11 or the third through hole 31 is completely sealed by the rivet cap 72, the pole structure not only has the characteristics of high shearing force, vibration resistance and high pressure resistance, but also can fasten poles and ensure the sealing and overcurrent and tension effects, thereby improving the quality of the battery cell product.
Second embodiment
The difference from the first embodiment is that: a sealing ring 6 is arranged between the second plastic part 4 and the blind rivet 7, the sealing ring 6 is provided with a protrusion 61, the protrusion 61 is arranged around the inside of the first through hole 11, the protrusion 61 abuts against the bottom of the first plastic part 2, and the fourth through hole 41 surrounds the edge of the sealing ring 6. Sealing washer 6 can set up ascending arch 61, can keep apart the inner wall of first through-hole 11 and self-plugging rivet 7's effect, avoid keeping apart remaining wire of processing in the first through-hole 11 and scratch self-plugging rivet 7, prevent that wire and self-plugging rivet 7 from taking place the condition of short circuit, help improving the security of battery, simultaneously, further improve the seal performance between sealing washer 6 and the self-plugging rivet 7, reduce the probability that electrolyte takes place to leak, nevertheless the utility model discloses do not regard this as the limit, first plastic part 2 also can set up decurrent extension, with the protruding 61 cooperation of sealing washer 6, also can surround first through-hole 11's inner wall, the extension can also be other shapes, satisfy that the inner wall that prevents first through-hole 11 and self-plugging rivet 7 direct contact can.
Other structures are the same as those of the first embodiment, and are not described herein again.
Third embodiment
The difference from the first embodiment is that: the pole structure of this embodiment still includes connecting piece 5, the bottom of second plastic part 4 is provided with fourth recess 42, connecting piece 5 inlays in fourth recess 42, connecting piece 5 is provided with the fifth through-hole 51 that supplies self-plugging rivet 7 to pass, the tip of connecting piece 5 is provided with pin 52 and breach 53, pin 52 is used for connecting the utmost point ear of electric core, second plastic part 4 is provided with the concave part with breach 53 complex, the material of nail cap 72 and the material of connecting piece 5 all are the same rather than the mass flow material of the pole piece of the electric core of electricity connection. When the number of the battery cores in the battery is large or the tabs are short, the connecting piece 5 can be used in series between the self-plugging rivet 7 and the tabs of the battery cores in the assembly process, the self-plugging rivet 7 passes through the fifth through hole 51 to realize the fixed connection between the connecting piece 5 and the self-plugging rivet 7, meanwhile, the connecting piece 5 is arranged at the bottom of the second plastic piece 4, which is beneficial to reducing the probability of the self-plugging rivet 7 to generate displacement, in addition, according to the structure and the cost requirement of the actual battery, the connecting piece 5 can be in a long plate type, which is beneficial to increasing the contact area between the connecting piece 5 and the tabs of the battery cores, the connecting piece 5 is embedded in the first plastic piece 4, so that the top cover plate 1 is prevented from being electrically connected with the connecting piece 5, the positive and negative poles are prevented from being conducted to generate battery short circuit, meanwhile, in order to prevent the upper end surface of the battery cores from being contacted with or scratched by the connecting piece 5, the third plastic piece can also be fixed at the bottom of the connecting piece 5, separating the upper end surface of the battery cell from the connecting piece 5; in this embodiment, the nail cap 72, rivet the material of core 71 and be copper or aluminium, it is specific, first utmost point post is as anodal, the second utmost point post is as the negative pole, the nail cap 72 of second utmost point post and the connecting piece 5 of being connected with the second utmost point post all adopt the copper material, not only guarantee not have the pressure drop because of the material difference leads to, still saved and become negative pole post by two kinds of substrates of copper aluminium, the simplified processing process, and reduction in production cost, the core 71 of riveting of second utmost point post can adopt the aluminium material, and the nail cap 72 of first utmost point post and the connecting piece 5 of being connected with first utmost point post all adopt the aluminium material, the core 71 of riveting of first utmost point post also adopts the aluminium material, copper is lower compared to the cost of aluminium, help reducing the manufacturing cost of utmost point post. Wherein, pin 52 extends along the direction of keeping away from top plate 1, go out the structure of utmost point ear to electric core both sides, first utmost point ear and the second utmost point ear that extend respectively along electric core length direction's both ends, pin 52 is in the same place with the first utmost point ear of both sides and the welding of second utmost point ear, can reduce the space that coupling part took in top plate 1 below, multiplicable coiling space, improve the energy density of battery, breach 53 cooperation concave part, play the effect spacing and fixed to connecting piece 5, prevent that connecting piece 5 from taking place horizontal or fore-and-aft displacement, help improving the steadiness of connecting piece 5, the shape of mating connection 5, can also reduce the weight of second plastic part 4, thereby reduce the holistic quality of battery.
Other structures are the same as those of the second embodiment, and are not described herein again.
Embodiment IV
A power battery comprises a shell provided with an opening; the battery cell is accommodated in the shell; in the top cover structure of the power battery according to the first embodiment, the top cover sheet 1 is fixed to the opening and used for enclosing the battery cell in the casing.
It should be noted that: the power battery comprises an electric core, the electric core comprises a positive plate, a diaphragm and a negative plate, the positive plate can be sequentially stacked and wound, the positive plate comprises a positive current collector and a positive active material coated on the surface of the positive current collector, and the negative plate comprises a negative current collector and a negative active material coated on the surface of the negative current collector. First utmost point ear is connected in the anodal mass flow body, and the second utmost point ear is connected in the negative pole mass flow body, and the edge of the anodal mass flow body can have the blank area that is not covered by anodal active material, and first utmost point ear can be directly formed through cutting the blank area. Similarly, the second tab may also be formed by cutting the blank area of the negative current collector, and in addition, the first tab and the second tab may also be fixed to the blank area of the positive plate and the negative plate respectively by welding. The first pole lug and the first pole post are connected in a laser welding mode, and the second pole lug and the second pole post are connected.
Fifth embodiment
A power battery comprises a shell provided with an opening; the battery cell is accommodated in the shell; in the top cover structure of the power battery according to the second embodiment, the top cover sheet 1 is fixed to the opening and used for sealing the battery cell in the casing.
Sixth embodiment
A power battery comprises a shell provided with an opening; the battery cell is accommodated in the shell; in the top cover structure of the power battery according to the third embodiment, the top cover sheet 1 is fixed to the opening and used for enclosing the battery cell in the casing.
Variations and modifications to the above-described embodiments may become apparent to those skilled in the art from the disclosure and teachings of the above description. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious modifications, replacements or variations made by those skilled in the art on the basis of the present invention belong to the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (10)
1. A top cap structure of power battery, characterized by includes:
a top cover sheet (1);
a first plastic part (2) is arranged between the conductive block (3) and the top cover plate (1);
the top cover plate (1), the first plastic part (2) and the conductive block (3) are fixedly connected through a blind rivet (7).
2. The top cover structure of a power battery as claimed in claim 1, wherein: the top cover plate (1), the first plastic part (2) and the conductive block (3) are respectively provided with a first through hole (11), a second through hole (21) and a third through hole (31) which are communicated with the first through hole (11), and the blind rivet (7) sequentially penetrates through the first through hole (11), the second through hole (21) and the third through hole (31).
3. The top cover structure of a power battery as claimed in claim 2, wherein: the self-plugging rivet (7) comprises a rivet core (71) and a rivet cap (72) sleeved at the end part of the rivet core (71), a first clamping part (721) is arranged at the peripheral edge of one end of the rivet cap (72), and a second clamping part (722) is formed at the other end of the rivet cap (72) after the self-plugging is carried out and protrudes towards the periphery.
4. A top cover structure of a power battery as claimed in claim 3, wherein: the top of conductive block (3) is provided with third recess (32), first card portion (721) inlay in third recess (32), first plastic part (2) are provided with second recess (22), conductive block (3) inlay in second recess (22), top plate (1) is provided with first recess (12), first plastic part (2) inlay in first recess (12).
5. The top cover structure of the power battery as claimed in claim 4, wherein: first through-hole (11) set up in first recess (12), the bottom surface of first plastic part (2) with first recess (12) unsmooth cooperation, be used for with second through-hole (21) aim at first through-hole (11), second through-hole (21) set up in second recess (22), the bottom surface of conducting block (3) with second recess (22) unsmooth cooperation, be used for with third through-hole (31) aim at second through-hole (21).
6. A top cover structure of a power battery as claimed in claim 3, wherein: still include second plastic part (4), second plastic part (4) are fixed through unsmooth cooperation the bottom of top cap piece (1), second plastic part (4) are provided with the confession fourth through-hole (41) that self-plugging rivet (7) passed, the diameter of fourth through-hole (41) is less than or equal to the diameter of first through-hole (11).
7. The top cover structure of the power battery as claimed in claim 6, wherein: second plastic part (4) with be provided with sealing washer (6) between self-plugging rivet (7), sealing washer (6) are provided with protruding (61), protruding (61) center on the inside setting of first through-hole (11), protruding (61) butt in the bottom of first plastic part (2), fourth through-hole (41) surround the edge of sealing washer (6).
8. The top cover structure of a power battery as claimed in claim 7, wherein: still include connecting piece (5), the bottom of second plastic part (4) is provided with fourth recess (42), connecting piece (5) inlay in fourth recess (42), connecting piece (5) are provided with the confession fifth through-hole (51) that self-plugging rivet (7) passed, the tip of connecting piece (5) is provided with pin (52) and breach (53), pin (52) are used for connecting the utmost point ear of electric core, second plastic part (4) be provided with breach (53) complex concave part.
9. The top cover structure of a power battery as claimed in claim 8, wherein: still be provided with on top cap piece (1) and annotate in liquid hole (13) and the explosion-proof valve hole (14) at least one, annotate liquid hole (13) and seal through self-plugging rivet (7), protection film (141) are installed at the top of explosion-proof valve hole (14), explosion-proof valve (142) are installed to the bottom of explosion-proof valve hole (14), the material of nail cap (72) with the material of connecting piece (5) all is the same rather than the mass flow material of the pole piece of the electric core of electricity connection.
10. A power cell, comprising:
a housing provided with an opening;
the battery cell is accommodated in the shell;
the top cover structure of the power battery as claimed in any one of claims 1 to 9, wherein a top cover sheet (1) is fixed to the opening for enclosing the battery cell in the casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120514137.4U CN214754075U (en) | 2021-03-11 | 2021-03-11 | Top cover structure of power battery and power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120514137.4U CN214754075U (en) | 2021-03-11 | 2021-03-11 | Top cover structure of power battery and power battery |
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| Publication Number | Publication Date |
|---|---|
| CN214754075U true CN214754075U (en) | 2021-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120514137.4U Active CN214754075U (en) | 2021-03-11 | 2021-03-11 | Top cover structure of power battery and power battery |
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| Country | Link |
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| CN (1) | CN214754075U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115020924A (en) * | 2022-07-12 | 2022-09-06 | 远景动力技术(江苏)有限公司 | Rivet, cylindrical battery and battery pack |
| CN116581493A (en) * | 2023-07-12 | 2023-08-11 | 深圳海辰储能控制技术有限公司 | Top cap subassembly and have its battery cell |
-
2021
- 2021-03-11 CN CN202120514137.4U patent/CN214754075U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115020924A (en) * | 2022-07-12 | 2022-09-06 | 远景动力技术(江苏)有限公司 | Rivet, cylindrical battery and battery pack |
| CN116581493A (en) * | 2023-07-12 | 2023-08-11 | 深圳海辰储能控制技术有限公司 | Top cap subassembly and have its battery cell |
| CN116581493B (en) * | 2023-07-12 | 2023-12-15 | 深圳海辰储能控制技术有限公司 | Top cap subassembly and have its battery cell |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220118 Address after: 215500 No. 68, Xin'anjiang Road, Southeast street, Changshu, Suzhou, Jiangsu Patentee after: Jiangsu Zenergy Battery Technologies Co.,ltd Address before: 523000 Dalang Town, Dongguan, Guangdong province Xiangshan Pine Hill Village Xiangshan Industrial Park Jiayuan Road No. 9 Patentee before: DONGGUAN TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. Patentee before: JIANGSU TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. Patentee before: Jiangsu Tafel Power System Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CP03 | Change of name, title or address |
Address after: 215500 No. 68, Xin'anjiang Road, Southeast street, Changshu, Suzhou, Jiangsu Patentee after: Jiangsu Zhengli New Energy Battery Technology Co.,Ltd. Country or region after: China Address before: 215500 No. 68, Xin'anjiang Road, Southeast street, Changshu, Suzhou, Jiangsu Patentee before: Jiangsu Zenergy Battery Technologies Co.,ltd Country or region before: China |
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| CP03 | Change of name, title or address |