CN112259835B - Laminated battery pole core assembly, laminated battery and preparation process - Google Patents
Laminated battery pole core assembly, laminated battery and preparation process Download PDFInfo
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- CN112259835B CN112259835B CN202011026570.XA CN202011026570A CN112259835B CN 112259835 B CN112259835 B CN 112259835B CN 202011026570 A CN202011026570 A CN 202011026570A CN 112259835 B CN112259835 B CN 112259835B
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- laminated battery
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- 238000002360 preparation method Methods 0.000 title description 10
- 238000004804 winding Methods 0.000 claims abstract description 89
- 239000003792 electrolyte Substances 0.000 claims description 18
- 238000005520 cutting process Methods 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 11
- 239000008358 core component Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 description 20
- 239000002390 adhesive tape Substances 0.000 description 19
- 238000004519 manufacturing process Methods 0.000 description 14
- 238000003698 laser cutting Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 238000007654 immersion Methods 0.000 description 3
- 238000012858 packaging process Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012536 packaging technology Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0486—Frames for plates or membranes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
Abstract
The invention provides a laminated battery pole core assembly, which also comprises a support plate and a pole core winding body, wherein the support plate is arranged on at least one side of the length direction of a pole core, the pole core winding body is simultaneously wound on the surfaces of the support plate and the pole core along a spiral line direction, a plurality of lightening holes are formed in the support plate at intervals, the laminated battery comprises a shell structure, the laminated battery further comprises the laminated battery pole core assembly, and the laminated battery pole core assembly is arranged in the shell structure.
Description
Technical Field
The invention belongs to the technical field of laminated batteries, and particularly relates to a laminated battery pole core assembly, a laminated battery and a preparation process.
Background
Laminated batteries are commonly used in new energy automobiles. Compared with a coiled battery, the laminated battery has low internal resistance, high-rate discharge capacity and easy completion of high-current discharge in a short time. The laminated battery pole core component of the laminated battery comprises a pole core and a supporting plate, wherein the pole core comprises a plurality of positive pole pieces, a plurality of negative pole pieces and a plurality of diaphragms, and the plurality of positive pole pieces, the plurality of negative pole pieces and the plurality of diaphragms are laminated according to a preset sequence. The pole core further comprises a plurality of positive pole lugs and a plurality of negative pole lugs, each positive pole lug corresponds to the positive pole piece one by one, each negative pole lug corresponds to the negative pole piece one by one, each positive pole lug is fixed on the corresponding positive pole piece, each negative pole lug is fixed on the corresponding negative pole piece, the backs of each positive pole lug are connected with one another from one end of the corresponding positive pole piece, the backs of each negative pole lug are connected with one end of the corresponding negative pole piece, and each positive pole lug and each negative pole lug are arranged at the same end or different ends of the pole core. The pole pieces are typically enclosed within the housing structure of the laminated battery. The backup pad is fixed on the lateral edge of the length direction of pole piece. The supporting plate is adhered to the pole core through an adhesive tape. Since the adhesive tape covers one side surface of the electrode core, it is necessary to punch the support plate and the adhesive tape fixed to the electrode core in order to allow the electrolyte to better enter between the positive electrode sheet, the negative electrode sheet and the separator. Because of the very thin thickness of the tape, it is very cumbersome to punch the tape on the pole piece.
Disclosure of Invention
The invention aims to provide a laminated battery pole core assembly, which solves the technical problems that the thickness of a double-sided adhesive tape is very thin and the double-sided adhesive tape is very troublesome to punch in the prior art.
In order to achieve one of the above purposes, the technical scheme adopted by the invention is as follows: the laminated battery pole core assembly comprises a pole core, wherein the pole core comprises a plurality of positive pole pieces, a plurality of negative pole pieces, a plurality of diaphragms, a plurality of positive pole lugs and a plurality of negative pole lugs, the positive pole pieces, the diaphragms and the negative pole pieces are laminated according to a preset sequence, the positive pole lugs are in one-to-one correspondence with the positive pole pieces, the negative pole lugs are in one-to-one correspondence with the negative pole pieces, the positive pole lugs are electrically connected to the corresponding positive pole pieces, and the negative pole lugs are electrically connected to the corresponding negative pole pieces;
the laminated battery pole core assembly is characterized by further comprising a supporting plate and a pole core winding body, wherein the supporting plate is arranged on at least one side of the length direction of the pole core, the pole core winding body is spirally wound on the surfaces of the supporting plate and the pole core simultaneously, and adjacent pole core winding bodies in the spiral winding direction are arranged at intervals.
The laminated battery pole core assembly provided by the invention has the beneficial effects that: compared with the prior art, the pole core winding body realizes the connection stability of the pole core and the supporting plate, thereby improving the situation that the pole core is not easy to deform. Because adjacent pole core winding bodies in the spiral line direction are arranged at intervals, electrolyte is not easy to be blocked in the process of entering the pole core wound with the pole core winding bodies, and the electrolyte is easy to enter the wound pole core, so that the production efficiency of the laminated battery is improved.
Further, the pole core winding body is set to be a winding adhesive tape.
Further, two support plates are arranged, and the two support plates are respectively positioned at two sides of the length direction of the pole core.
Further, a plurality of lightening holes are formed in the supporting plate.
Further, the lightening holes are at least one of round holes, square holes or triangular holes.
The second object of the present invention is to provide a laminated battery, which includes a housing structure, and the laminated battery further includes a laminated battery pole core assembly as described above, wherein the laminated battery pole core assembly is mounted in the housing structure.
The laminated battery pole core assembly provided by the invention has the beneficial effects that: compared with the prior art, the shell structure plays a role in protecting the pole core wound with the pole core winding body, and improves the use safety of the laminated battery.
Further, the laminated battery also comprises a shell winding body which is spirally wound and covers the surface of the shell structure to form an insulating sealing layer.
The invention aims at providing a preparation process of a laminated battery pole core component, and in order to achieve the purpose, the invention adopts the following technical scheme: a preparation process of a laminated battery pole core component comprises the following steps:
Preparing a positive plate, a diaphragm and a negative plate; the positive plate is electrically connected with a positive electrode lug, and the negative plate is electrically connected with a negative electrode lug;
laminating the positive plate, the diaphragm and the negative plate according to a preset sequence to form a pole core;
The support plate is arranged on at least one side of the pole core in the length direction, a pole core winding body is spirally wound on the support plate and the surface of the pole core simultaneously to form a laminated battery pole core assembly, and adjacent pole core winding bodies in the spiral winding direction are arranged at intervals.
Further, after the step of arranging the support plate on at least one side of the pole core in the length direction, spirally winding a pole core winding body on the surfaces of the support plate and the pole core simultaneously to form a laminated battery pole core assembly, the step of arranging adjacent pole core winding bodies in the spiral winding direction at intervals is further included:
And cutting off the pole core winding body at the end face of the pole core wound with the pole core winding body through a cutting-off process.
Further, before the step of arranging the support plate on at least one side of the pole core in the length direction, spirally winding a pole core winding body on the surfaces of the support plate and the pole core simultaneously to form a laminated battery pole core assembly, the step of arranging adjacent pole core winding bodies in the spiral winding direction at intervals is further included:
a plurality of lightening holes are arranged on the supporting plate.
The preparation process of the laminated battery pole core assembly provided by the invention has the beneficial effects that: compared with the prior art, through the steps, the weight of the support plate can be reduced through the weight reducing holes, so that the weight of the laminated battery is reduced and electrolyte is not blocked from entering the pole core from the support plate. The pole core winding body realizes the connection stability of the pole core and the supporting plate, thereby improving the situation that the pole core is not easy to deform. Because adjacent pole core winding bodies in the spiral line direction are arranged at intervals, electrolyte is not easy to be blocked in the process of entering the pole core wound with the pole core winding bodies, and the electrolyte is easy to enter the wound pole core, so that the production efficiency of the laminated battery is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a laminated battery according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a laminated battery according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram III of a laminated battery according to an embodiment of the present invention;
fig. 4 is a schematic flow chart of a laminated battery manufacturing process according to an embodiment of the present invention;
fig. 5 is a schematic flow chart II of a laminated battery preparation process according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a laminated battery pole core assembly according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a laminated battery pole core assembly according to a second embodiment of the present invention;
Fig. 8 is a schematic flow chart of a process for manufacturing a laminated battery pole core assembly according to an embodiment of the present invention;
fig. 9 is a schematic diagram of another structure of a laminated battery pole core assembly according to an embodiment of the present invention;
fig. 10 is a schematic diagram of another structure of a laminated battery core assembly according to an embodiment of the present invention;
Fig. 11 is a schematic structural view of an adhesive tape for a battery according to an embodiment of the present invention.
Wherein, each reference sign in the figure:
1. A pole core; 111. a positive electrode tab; 112. a negative electrode tab; 2. a housing winding body; 3. an insulating sealing layer; 4. a housing structure; 41. a housing; 42. a cover plate; 5. an adhesive tape; 51. a dip hole; 7. a pole core winding body; 8. a support plate; 81. and a lightening hole.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Referring to fig. 1, 2 and 3, a laminated battery according to the present invention will now be described. A laminated battery includes a case structure 4, and a case wound body 2 is spirally wound and covered on the surface of the case structure 4 to form an insulating seal layer 3.
Compared with the prior art, because the shell winding body 2 is spirally wound on the surface of the shell structure 4, a user can arrange a plurality of shell structures 4 along a straight line direction, then move all the arranged shell structures 4 along the straight line direction, then wind the shell winding body 2 along all the shell structures 4 moving along the straight line direction, realize continuous package of the plurality of shell structures 4, cut the shell winding body 2 among the plurality of shell structures 4 continuously packaged by adopting a cutting process, and improve the production efficiency of the laminated battery.
Specifically, the casing structure 4 includes a casing 41 and a cover plate 42, where the cover plate 42 is fixed on the casing 41 and is used to seal an opening of the casing 41, and a liquid injection hole (not shown in the figure) is provided on the cover plate 42, and the liquid injection hole is used to introduce electrolyte, and the casing 41 is used to sleeve the laminated battery pole core assembly.
Optimally, the cover plate 42 is welded to the housing 41.
Specifically, the surface of the same housing structure 4 is formed with a plurality of insulating sealing layers 3, which improves the insulating property of the laminated battery.
Specifically, the case wound body 2 is made of PET or PBT, has good insulation and flexibility, and is easily cut.
Referring to fig. 1 and 4, the present invention further provides a preparation process of a laminated battery, which includes the following steps:
s1-1, preparing a positive plate, a diaphragm, a negative plate, a positive tab and a negative tab;
S1-2, electrically connecting the positive electrode tab on the positive electrode plate, and electrically connecting the negative electrode tab on the negative electrode plate;
S1-3, preparing the positive plate electrically connected with the positive electrode tab, the diaphragm and the negative plate electrically connected with the negative electrode tab to form a laminated battery electrode core assembly;
s1-4, loading the laminated battery pole core assembly into a shell structure;
S1-5, spirally winding the shell winding body on the surface of the shell structure to form an insulating sealing layer.
According to the preparation process of the laminated battery, through the steps, the shell winding body is a strip body, and the laminated battery is easy to coil and cover on the surface of the shell structure of the laminated battery. The housing winding body can wind the housing structure of the laminated battery with any volume, and the width of the housing winding body is not required to be changed because of the housing structure of the laminated battery with different volumes.
Further, referring to fig. 1 and 4, as a specific embodiment of a laminated battery manufacturing process provided by the present invention, steps S1-5 are set as follows: the shell winding body is spirally wound on the surface of the shell structure to form a plurality of layers of insulating sealing layers.
Further, referring to fig. 4 and 5, as a specific embodiment of a laminated battery manufacturing process provided by the present invention, in step S1-5, the following steps are included:
s2-1: spirally winding the shell winding body on the shell structure to form a wrapping layer;
S2-2: cutting off the shell wound body at the end face where the shell structure is formed by a cutting-off process;
s2-3: and packaging the wrapping layer on the shell structure processed by the cutting process by adopting a packaging process, wherein the packaged wrapping layer forms the insulating sealing layer.
Specifically, the cutting process is a laser cutting process or a blade cutting process, and the cutting process is preferably a laser cutting process, and the cutting process can cut the shell wound body at the end face of the shell structure covered with the insulating sealing layer without contacting the shell wound body at the end face of the shell structure covered with the insulating sealing layer, thereby reducing the influence on the shell structure covered with the insulating sealing layer. The blade cutting process cuts the shell wound body at the end face of the shell structure covered with the insulating sealing layer by using a blade.
Optimally, the laser cutting process is carried out by a laser cutting device (not shown in the figures).
Specifically, the packaging process is set to a heat shrinkage process or a folding packaging process.
Optimally, the heat shrinkage process is realized through heat shrinkage equipment; the folding packaging technology is realized through folding packaging equipment.
Further, referring to fig. 3,4 and 5, as a specific embodiment of a laminated battery manufacturing process provided by the present invention, step S2-1 is provided, in which the casing winding body is spirally wound on a plurality of casing structures arranged and conveyed in a straight line direction to form the wrapping layer;
Step S2-2 is provided to cut the shell wound body at the end face of each of the shell structures where the wrapping layer is formed by the cutting process.
Through the steps, the shell structures are continuously conveyed, each shell structure is wound, and the production efficiency of the laminated battery is improved.
Specifically, the housing windings are helically wound on the housing structure by a taping machine (not shown) to form a wrap.
Optimally, the belt winding machine comprises a feeding device, a transferring device, a winding device and a discharging device. The transfer device can move a plurality of shell structures to the winding device by the feeding device every time, the winding device can synchronously wind the shell winding bodies on a plurality of shell structures every time, and the transfer device can also transfer the shell structures after tape winding to the discharging device for discharging by the shell structures, so that the result of the tape winding machine is simple, the automation degree is high, and the efficiency is high. In addition, the interval between the shell structures can be adjusted in the process of transferring the shell structures to be wound or/and wound by the transferring device, so that feeding devices with different intervals of the shell structures and winding devices or/and winding devices with different intervals and discharging devices can be conveyed, other transferring devices are not required to be additionally arranged, adjustment of the shell structures corresponding to different models is realized, and the universality of the winding machine is improved.
Referring to fig. 6 and 7, the present invention further provides a laminated battery pole core assembly, which includes a pole core 1, a support plate 8 and a pole core winding body 7, wherein the support plate 8 is disposed on at least one side of the length direction of the pole core 1, the pole core winding body 7 is spirally wound on the surfaces of the support plate 8 and the pole core 1 at the same time, and adjacent pole core winding bodies 7 in the spiral winding direction are disposed at intervals.
The pole core winding body 7 realizes the connection stability of the pole core 1 and the supporting plate 8, thereby improving the situation that the pole core 1 is not easy to deform. Because the adjacent pole core winding bodies 7 in the spiral winding direction are arranged at intervals, electrolyte is not easy to be blocked in the process of entering the pole core 1 spirally wound with the pole core winding bodies 7, and the electrolyte is easy to enter the pole core 1 spirally wound, so that the production efficiency of the laminated battery is improved.
Further, referring to fig. 6 and 7, as an embodiment of a laminated battery pole core assembly provided by the present invention, a plurality of weight reducing holes 81 are provided on the support plate 8.
The weight-reducing holes 81 can reduce the weight of the support plate 8, thereby reducing the weight of the laminated battery and not obstructing the entry of electrolyte from the support plate 8 into the electrode core 1.
Specifically, the electrode core 1 includes a plurality of positive electrode sheets a, a plurality of negative electrode sheets b, and a plurality of separators c, which are stacked in a preset order. The preset sequence among the plurality of positive plates a, the plurality of negative plates b and the plurality of diaphragms c belongs to the prior art, so that the description is omitted.
Specifically, the electrode core 1 further includes a plurality of positive electrode tabs 111 and a plurality of negative electrode tabs 112, each positive electrode tab 111 corresponds to a positive electrode tab a one to one, each negative electrode tab 112 corresponds to a negative electrode tab b one to one, each positive electrode tab 111 is electrically connected to a corresponding positive electrode tab a, each negative electrode tab 112 is electrically connected to a corresponding negative electrode tab b, one ends of each positive electrode tab 111 deviating from the corresponding positive electrode tab a are connected to each other, one ends of each negative electrode tab 112 deviating from the corresponding negative electrode tab b are connected to each other, and each positive electrode tab 111 and each negative electrode tab 112 are disposed at the same end or different ends of the electrode core 1.
Specifically, the pole core winding body 7 is provided as a winding tape.
Specifically, the lightening hole 81 is provided as at least one of a circular hole, a square hole, or a triangular hole.
Further, referring to fig. 6 and 7, as a specific embodiment of a laminated battery pole core assembly provided by the present invention, two support plates 8 are provided, the two support plates 8 are respectively located at two sides of the length direction of the pole core 1, the pole core 1 is clamped by the two support plates 8, and the two support plates 8 prevent the pole core 1 from being deformed due to external force.
Further, referring to fig. 1 and 6, as a specific embodiment of a laminated battery provided by the present invention, the structure of the laminated battery housing structure 4 is the same as that of the laminated battery housing structure 4, and the difference is that the laminated battery pole core assembly is installed in the laminated battery housing structure 4, and the laminated battery housing structure 4 plays a role in protecting the pole core 1 spirally wound with the pole core winding body 7, so as to improve the use safety of the laminated battery.
Referring to fig. 8, the invention further provides a preparation process of the laminated battery pole core assembly, which comprises the following steps:
S3-1: preparing a positive plate, a diaphragm and a negative plate; the positive plate is electrically connected with a positive electrode lug, and the negative plate is electrically connected with a negative electrode lug;
s3-2: laminating the positive plate, the diaphragm and the negative plate according to a preset sequence to form a pole core;
S3-3: the support plate is arranged on at least one side of the pole core in the length direction, a pole core winding body is spirally wound on the support plate and the surface of the pole core simultaneously to form a laminated battery pole core assembly, and adjacent pole core winding bodies in the spiral winding direction are arranged at intervals.
Compared with the prior art, the weight reducing holes can reduce the weight of the support plate through the steps S3-1 and S3-3, thereby reducing the weight of the laminated battery and not preventing electrolyte from entering the pole core from the support plate. The pole core winding body realizes the connection stability of the pole core and the supporting plate, thereby improving the situation that the pole core is not easy to deform. Because the adjacent pole core winding bodies in the spiral winding direction are arranged at intervals, electrolyte is not easy to be blocked in the process of entering the pole core spirally wound with the pole core winding bodies, and the electrolyte is easy to enter the pole core spirally wound, so that the production efficiency of the laminated battery is improved.
Further, referring to fig. 8, as a specific embodiment of the process for manufacturing a laminated battery pole core assembly provided by the present invention, after step S3-3, the method includes the following steps:
And cutting off the pole core winding body at the end face of the pole core spirally wound with the pole core winding body through a cutting-off process.
And cutting off the pole core winding body which is not wound on the pole core through the steps.
Specifically, the cutting process is a laser cutting process or a blade cutting process, and the cutting process is preferably a laser cutting process, and the cutting process can be performed without contacting the pole core winding body at the end face of the pole core spirally wound with the pole core winding body, thereby reducing the influence on the pole core winding body positioned on the pole core.
Optimally, the laser cutting process is realized by a laser cutting device.
Further, referring to fig. 8, as a specific embodiment of the process for manufacturing a laminated battery pole core assembly provided by the present invention, the following steps are included before step S3-3:
a plurality of lightening holes are arranged on the supporting plate.
The weight of the supporting plate is reduced through the steps, and then the weight of the laminated battery pole core assembly is reduced.
Referring to fig. 9 and 10, the present invention further provides a laminated battery pole core assembly, which is different from the laminated battery pole core assembly in that the laminated battery pole core assembly does not need to be provided with a housing winding body 2, the laminated battery pole core assembly further comprises an adhesive tape 5, a plurality of immersion holes 51 are preset on the adhesive tape 5, the adhesive tape 5 covers the support plate 8 and is connected to the pole core 1, and at least one immersion hole 51 is communicated with at least one lightening hole 81 on the support plate 8.
In this laminated battery pole core assembly, electrolyte enters the pole core 1 from the immersion aperture 51 and the lightening aperture 81, reducing the obstruction of the electrolyte by the support plate 8 and the adhesive tape 5 into the housing structure 4, compared to the prior art. The weight-reducing holes 81 simultaneously reduce the weight of the support plate 8. The adhesive tape 5 is not required to be fixed on the pole core 1 for punching, and the production efficiency of the laminated battery is improved.
Further, referring to fig. 9 and 10, as a specific embodiment of a laminated battery pole core assembly provided by the present invention, one side of the support plate 8 contacts the pole core 1, and the adhesive tape 5 is located on the side of the support plate 8 facing away from the pole core 1, so as to improve the convenience of use of the adhesive tape 5.
Further, referring to fig. 9 and 10, as a specific embodiment of a laminated battery pole core assembly provided by the present invention, two adhesive tapes 5 are provided, two support plates 8 are provided, two adhesive tapes 5 are respectively corresponding to the support plates 8 one by one, two support plates 8 are respectively located at two sides of the pole core 1 in the length direction, the two adhesive tapes 5 respectively cover the corresponding support plates 8 and are fixed on the pole core 1, the pole core 1 is clamped by the two support plates 8, and the two support plates 8 prevent the pole core 1 from being deformed by external force.
Referring to fig. 9 and 10, the present invention further provides a laminated battery, as a specific embodiment of the laminated battery provided by the present invention, the housing structure 4 of the laminated battery is identical to the structure of the housing structure 4 of the laminated battery, and the difference is that the laminated battery pole core assembly is installed in the housing structure 4 of the laminated battery, and the housing structure 4 plays a role of protecting the pole core 1 of the support plate 8 fixed by the adhesive tape 5, so as to improve the use safety of the laminated battery.
Referring to fig. 11, the present invention further provides a support plate for a battery, which has the same structure as the support plate 8 of the laminated battery pole core assembly. The use mode of the battery support plate refers to the use mode of the support plate 8 of the laminated battery pole core assembly, so that the use mode of the battery support plate is not repeated.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (4)
1. The laminated battery comprises a shell structure and is characterized by further comprising a laminated battery pole core assembly and a shell winding body, wherein the laminated battery pole core assembly is arranged in the shell structure, and the shell winding body is spirally wound and covers the surface of the shell structure to form an insulating sealing layer;
The shell winding body can wind a plurality of shell structures which move along a straight line direction and are arranged along the straight line direction so as to realize continuous package of the shell structures, and the shell winding bodies among the shell structures which are continuously packaged are cut by adopting a cutting process;
The laminated battery pole core component comprises a pole core, wherein the pole core comprises a plurality of positive pole pieces, a plurality of negative pole pieces, a plurality of diaphragms, a plurality of positive pole lugs and a plurality of negative pole lugs, the positive pole pieces, the diaphragms and the negative pole pieces are laminated according to a preset sequence, the positive pole lugs are in one-to-one correspondence with the positive pole pieces, the negative pole lugs are in one-to-one correspondence with the negative pole pieces, the positive pole lugs are electrically connected to the corresponding positive pole pieces, and the negative pole lugs are electrically connected to the corresponding negative pole pieces;
The laminated battery pole core assembly further comprises a support plate and a pole core winding body, wherein the support plate is arranged on at least one side of the length direction of the pole core, the pole core winding body is spirally wound on the surfaces of the support plate and the pole core at the same time, and adjacent pole core winding bodies in the spiral winding direction are arranged at intervals;
electrolyte can enter between the positive plate and the diaphragm from the length direction of the pole core, and electrolyte can enter between the negative plate and the diaphragm from the length direction of the pole core;
the support plate is provided with a plurality of lightening holes, the lightening holes are opposite to the side surfaces of the pole core in the length direction, and electrolyte is not blocked from entering the pole core from the support plate along the length direction of the pole core.
2. A laminated battery as claimed in claim 1, wherein the pole core winding is provided as a winding tape.
3. A laminated battery as claimed in claim 1, wherein two of the support plates are provided, the two support plates being located on both sides of the length direction of the electrode core, respectively.
4. The laminated battery of claim 1, wherein the lightening holes are provided as at least one of round holes, square holes or triangular holes.
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| CN112259835B (en) * | 2020-09-25 | 2024-05-17 | 深圳市西盟特电子有限公司 | Laminated battery pole core assembly, laminated battery and preparation process |
| CN113394493A (en) * | 2021-06-25 | 2021-09-14 | 银隆新能源股份有限公司 | Lithium ion battery and electric vehicle with same |
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