CN112259835A - 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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- CN112259835A CN112259835A CN202011026570.XA CN202011026570A CN112259835A CN 112259835 A CN112259835 A CN 112259835A CN 202011026570 A CN202011026570 A CN 202011026570A CN 112259835 A CN112259835 A CN 112259835A
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- 238000002360 preparation method Methods 0.000 title claims description 8
- 238000004804 winding Methods 0.000 claims abstract description 111
- 238000005520 cutting process Methods 0.000 claims description 20
- 238000004519 manufacturing process Methods 0.000 claims description 19
- 238000010030 laminating Methods 0.000 claims description 3
- 239000008358 core component Substances 0.000 claims description 2
- 239000000565 sealant Substances 0.000 claims 1
- 238000000034 method Methods 0.000 description 19
- 239000003792 electrolyte Substances 0.000 description 15
- 239000002390 adhesive tape Substances 0.000 description 13
- 238000007789 sealing Methods 0.000 description 12
- 238000003698 laser cutting Methods 0.000 description 8
- 238000003475 lamination Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000007599 discharging Methods 0.000 description 4
- 238000012858 packaging process Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
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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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- 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 further comprises a supporting plate and a pole core winding body, wherein the supporting plate is arranged on at least one side of the pole core in the length direction, the pole core winding body is simultaneously wound on the surfaces of the supporting plate and the pole core along a spiral line direction, adjacent pole core winding bodies in the spiral line direction are arranged at intervals, and a plurality of lightening holes are formed in the supporting plate.
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
The laminated battery is generally applied to a new energy automobile. Compared with a wound battery, the laminated battery has low internal resistance, more high-rate discharge capacity and is easy to finish large-current discharge in a short time. Laminated battery pole piece subassembly of lamination formula battery, lamination formula battery pole piece subassembly include utmost point core and backup pad, and the utmost point core includes that a plurality of positive plate, a plurality of negative pole piece and a plurality of diaphragm are constituteed, and a plurality of positive plate, a plurality of negative pole piece and a plurality of diaphragm are range upon range of according to predetermined order. The pole piece still includes a plurality of anodal utmost point ear and a plurality of negative pole utmost point ear, each anodal utmost point ear and positive plate one-to-one, each negative pole utmost point ear and negative plate one-to-one, each anodal utmost point ear is fixed on the anodal piece that corresponds, each negative pole utmost point ear is fixed on the negative plate that corresponds, each anodal utmost point ear deviates from the one end interconnect of the anodal piece that corresponds, each negative pole utmost point ear deviates from the one end interconnect of the negative plate that corresponds, each anodal utmost point ear and each negative pole utmost point ear setting are at the same end or the difference of pole piece. The pole core is typically encapsulated within the housing structure of the laminated battery. The supporting plate is fixed on the side edge of the pole core in the length direction. The supporting plate is adhered to the pole core through an adhesive tape. Since the tape covers one side surface of the pole piece, the support plate and the tape fixed to the pole piece need to be perforated in order to allow the electrolyte to better enter between the positive plate, the negative plate, and the separator. Since the thickness of the tape is very thin, it is very troublesome to punch the tape on the pole piece.
Disclosure of Invention
One of the objectives of the present invention is to provide a laminated battery core assembly to solve the technical problems of the prior art that the thickness of a double-sided tape is very thin and the punching of the double-sided tape is very troublesome.
In order to realize one of the purposes, the invention adopts the technical scheme that: the laminated battery pole piece assembly comprises a pole piece, wherein the pole piece 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 stacked 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 pole core winding bodies, wherein the supporting plate is arranged on at least one side of the pole core in the length direction, the pole core winding bodies are simultaneously spirally wound on the surfaces of the supporting plate and the pole core, and the 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 deformation resistance of the pole core. Because the ascending adjacent utmost point core winding body of helix side is the interval setting, and electrolyte is difficult for being hindered at the in-process that gets into this utmost point core around being equipped with utmost point core winding body, and electrolyte enters into this by the utmost point core of establishing easily, improves the production efficiency of lamination formula battery.
Further, the pole core winding body is a winding tape.
Furthermore, the supporting plates are arranged in two numbers, and the two supporting plates are respectively positioned on two sides of the pole core in the length direction.
Furthermore, a plurality of lightening holes are formed in the supporting plate.
Furthermore, the lightening holes are at least one of round holes, square holes or triangular holes.
The second purpose of the invention is to provide a laminated battery, which comprises a shell structure and a laminated battery pole core assembly, wherein the laminated battery also comprises the laminated battery pole core assembly, and the laminated battery pole core assembly is arranged in the shell 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, and the shell winding body is spirally wound and covers the surface of the shell structure to form an insulating sealing layer.
The third purpose of the invention is to provide a preparation process of a laminated battery pole core component, and in order to realize the third purpose, the invention adopts the technical scheme that: a preparation process of a laminated battery pole core assembly 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 supporting plate is arranged on at least one side of the pole core in the length direction, a pole core winding body is simultaneously spirally wound on the surfaces of the supporting plate and the pole core to form a laminated battery pole core assembly, and the pole core winding bodies are arranged at intervals in the spiral winding direction.
Further, after the step of arranging the support plate on at least one side in the length direction of the pole core, simultaneously spirally winding a pole core winding body on the surfaces of the support plate and the pole core to form a laminated battery pole core assembly, the following steps are further included after the adjacent pole core winding bodies in the spiral winding direction are arranged at intervals:
and cutting off the pole core winding body at the end face of the pole core wound with the pole core winding body by a cutting process.
Further, before the step of arranging the support plate on at least one side of the pole core in the length direction, simultaneously spirally winding a pole core winding body on the surfaces of the support plate and the pole core to form a laminated battery pole core assembly, the following steps are further included before the step of arranging the adjacent pole core winding bodies in the spiral winding direction at intervals:
the support plate is provided with a plurality of lightening holes.
The preparation process of the laminated battery pole core assembly provided by the invention has the beneficial effects that: compared with the prior art, the weight of the support plate can be reduced through the lightening holes, so that the weight of the laminated battery is reduced, and the electrolyte is not prevented 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, so that the pole core is not easy to deform. Because the ascending adjacent utmost point core winding body of helix side is the interval setting, and electrolyte is difficult for being hindered at the in-process that gets into this utmost point core around being equipped with utmost point core winding body, and electrolyte enters into this by the utmost point core of establishing easily, improves the production efficiency of lamination formula battery.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a first 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 three of a laminated battery according to an embodiment of the present invention;
fig. 4 is a first schematic flow chart of a laminated battery manufacturing process according to an embodiment of the present invention;
fig. 5 is a second schematic flow chart of a laminated battery manufacturing process according to an embodiment of the present invention;
fig. 6 is a first schematic structural diagram of a laminated battery pole core assembly according to an embodiment of the present invention;
fig. 7 is a structural schematic diagram of a laminated battery pole core assembly according to an embodiment of the present invention;
fig. 8 is a schematic flow chart of a process for manufacturing a laminated battery core assembly according to an embodiment of the present invention;
fig. 9 is a schematic view showing another structure of a laminated battery core assembly according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of another laminated battery pole 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, in the figures, the respective reference numerals:
1. a pole piece; 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. an immersion liquid hole; 7. a pole core winding body; 8. a support plate; 81. and (7) lightening holes.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present 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 merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" 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 will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1, 2 and 3, a stacked battery according to the present invention will now be described. A laminated battery includes a case structure 4, and a case winding body 2 wound along a spiral and covering a surface of the case structure 4 to form an insulating sealing layer 3.
Compared with the prior art, because the shell winding body 2 along spiral winding on shell structure 4's surface, the user can arrange a plurality of shell structure 4 along a rectilinear direction, then all shell structure 4 that will arrange are along the rectilinear direction activity, twine the shell winding body 2 along all shell structure 4 to the rectilinear direction activity after that, realize the continuous packing to a plurality of shell structure 4, the shell winding body 2 between a plurality of shell structure 4 of continuous packing adopts cutting technology to cut, the production efficiency of lamination formula battery has been improved.
Specifically, the housing structure 4 includes a casing 41 and a cover plate 42, the cover plate 42 is fixed on the casing 41 and is used for sealing the opening of the casing 41, a liquid injection hole (not shown) is formed in the cover plate 42 and is used for introducing electrolyte, and the casing 41 is used for sleeving the laminated battery pole core assembly.
The cover plate 42 is preferably welded to the housing 41.
Specifically, multiple insulating sealing layers 3 are formed on the surface of the same housing structure 4 to improve the insulation of the laminated battery.
Specifically, the case winding body 2 is made of a PET body or a PBT body, has good insulation and flexibility, and is easily cut.
Referring to fig. 1 and 4, the present invention further provides a process for manufacturing a stacked battery, including 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 pole tab to the positive pole piece, and electrically connecting the negative pole tab to the negative pole piece;
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 pole core assembly;
s1-4, installing the laminated battery pole core assembly into a shell structure;
and 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, the winding body of the shell is a strip-shaped body which is easy to wind and covers 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 does not need to be changed due to the housing structure of the laminated battery with different volumes.
Further, referring to fig. 1 and fig. 4, as an embodiment of a manufacturing process of a laminated battery provided by the present invention, step S1-5 is set as: the outer shell winding body is spirally wound on the surface of the outer shell structure to form a plurality of layers of the insulating sealing layers.
Further, referring to fig. 4 and 5, as an embodiment of the process for manufacturing a laminated battery according to the present invention, step S1-5 includes the following steps:
s2-1: helically winding the outer shell winding on the outer shell structure to form a wrapping layer;
s2-2: cutting the housing winding body at the end face where the housing structure is formed by a cutting 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 set to a laser cutting process or a blade cutting process, and the cutting process is preferably a laser cutting process, and the housing winding body at the end face of the housing structure covered with the insulating sealing layer can be cut without contacting with the housing winding body at the end face of the housing structure covered with the insulating sealing layer, so that the influence on the housing structure covered with the insulating sealing layer is reduced. The blade cutting process adopts a blade to cut off the shell winding body at the end face of the shell structure covered with the insulating sealing layer.
The laser cutting process is optimally carried out by means of a laser cutting device (not shown).
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; and the folding packaging process is realized by folding packaging equipment.
Further, referring to fig. 3, 4 and 5, as an embodiment of a manufacturing process of a laminated battery according to the present invention, step S2-1 is configured to spirally wind the case winding body on a plurality of case structures arranged and conveyed in a straight direction to form the wrapping layer;
step S2-2 is configured to perform a cutting process on the case wound body at the end face of each case structure on which the wrapping layer is formed by the cutting process.
Through the steps, the continuous conveying of the shell structures is realized, and each shell structure is wound, so that the production efficiency of the laminated battery is improved.
Specifically, the envelope winding body is spirally wound on the envelope structure by a tape winding machine (not shown) to form a wrapping layer.
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 at each time, the winding device can synchronously wind a plurality of shell structures by the shell winding body at each time, and the transfer device can also transfer a plurality of shell structures after tape winding to the discharging device by the shell structures at the same time for discharging, and the tape winding machine is simple in result, high in automation degree and high in efficiency. In addition, the transfer device can adjust the distance between the shell structures in the process of transferring a plurality of shell structures to be wound or/and wound, so that the feeding devices and the winding devices of the plurality of shell structures with different distances and/or the winding devices and the discharging devices with different distances can be transferred without adding other transfer devices, the shell structures corresponding to different models are adjusted, and the universality of the belt winding machine is improved.
Referring to fig. 6 and 7, the present invention further provides a laminated battery pole piece assembly, which includes a pole piece 1, a support plate 8 and a pole piece winding body 7, wherein the support plate 8 is disposed on at least one side of the pole piece 1 in the length direction, the pole piece winding body 7 is simultaneously spirally wound on the surfaces of the support plate 8 and the pole piece 1, and the adjacent pole piece 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 support plate 8, thereby improving the resistance to deformation of the pole core 1. Because adjacent utmost point core winding 7 on the spiral winding direction is the interval setting, electrolyte is difficult for being hindered at the in-process that gets into this spiral winding has utmost point core 1 of utmost point core winding 7, and electrolyte enters into this by spiral winding's utmost point core 1 easily in, improves the production efficiency of lamination formula battery.
Further, referring to fig. 6 and 7, as an embodiment of the laminated battery pole core assembly provided by the present invention, a plurality of lightening holes 81 are formed on the supporting plate 8.
The lightening holes 81 enable to reduce the weight of the support plate 8, thereby reducing the weight of the laminated battery and not hindering the electrolyte from entering from the support plate 8 into the pole core 1.
Specifically, the pole core 1 includes a plurality of positive plates a, a plurality of negative plates b, and a plurality of diaphragms c, and the plurality of positive plates a, the plurality of negative plates b, and the plurality of diaphragms c 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, and is not described in detail.
Specifically, the pole core 1 further includes a plurality of positive pole tabs 111 and a plurality of negative pole tabs 112, each positive pole tab 111 corresponds to a positive pole piece a one by one, each negative pole tab 112 corresponds to a negative pole piece b one by one, each positive pole tab 111 is electrically connected to the corresponding positive pole piece a, each negative pole tab 112 is electrically connected to the corresponding negative pole piece b, one end of each positive pole tab 111 departing from the corresponding positive pole piece a is interconnected, one end of each negative pole tab 112 departing from the corresponding negative pole piece b is interconnected, each positive pole tab 111 and each negative pole tab 112 are disposed at the same end or different ends of the pole core 1.
Specifically, the pole core winding body 7 is provided as a winding tape.
Specifically, the lightening holes 81 are at least one of circular holes, square holes, or triangular holes.
Further, referring to fig. 6 and 7, as a specific embodiment of the 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 pole core 1 in the length direction, 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 an external force.
Further, referring to fig. 1 and fig. 6, an embodiment of a laminated battery provided by the present invention is the same as the structure of the housing structure 4 of the laminated battery, except that the housing structure 4 of the laminated battery is provided with the laminated battery pole core assembly, and the housing structure 4 serves to protect the pole core 1 spirally wound with the pole core winding body 7, so as to improve the safety of the laminated battery.
Referring to fig. 8, the present invention further provides a process for manufacturing a laminated battery core assembly, including 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 supporting plate is arranged on at least one side of the pole core in the length direction, a pole core winding body is simultaneously spirally wound on the surfaces of the supporting plate and the pole core to form a laminated battery pole core assembly, and the pole core winding bodies are arranged at intervals in the spiral winding direction.
The lightening holes enable to reduce the weight of the support plate by steps S3-1 and S3-3, compared to the prior art, thereby reducing the weight of the laminated battery and not hindering the electrolyte from entering from the support plate into the pole core. The pole core winding body realizes the connection stability of the pole core and the supporting plate, so that the pole core is not easy to deform. Because the adjacent utmost point core winding body on the spiral winding direction is the interval setting, electrolyte is difficult for being hindered at the in-process that gets into this spiral winding has the utmost point core of utmost point core winding body, and electrolyte enters into this by spiral winding's utmost point core easily in, improves the production efficiency of lamination formula battery.
Further, referring to fig. 8, as an embodiment of a manufacturing process of a laminated battery 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 by a cutting process.
The pole core winding body which is not wound on the pole core is cut 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 on which the pole core winding body is spirally wound, thereby reducing the influence on the pole core winding body positioned on the pole core.
Optimally, the laser cutting process is realized by laser cutting equipment.
Further, referring to fig. 8, as an embodiment of a manufacturing process of a laminated battery core assembly provided by the present invention, before step S3-3, the method includes the following steps:
the support plate is provided with a plurality of lightening holes.
Through the steps, the weight of the supporting plate is reduced, and the weight of the laminated battery pole core assembly is further reduced.
Referring to fig. 9 and 10, the present invention further provides a laminated battery core assembly, which is different from the above laminated battery core assembly in that the laminated battery core assembly does not need to be provided with the housing winding body 2, the laminated battery core assembly further includes an adhesive tape 5, a plurality of dipping holes 51 are preset on the adhesive tape 5, the adhesive tape 5 covers the support plate 8 and is connected to the core 1, and at least one dipping hole 51 is communicated with at least one weight-reducing hole 81 on the support plate 8.
In contrast to the prior art, in this laminated battery core assembly, electrolyte enters the core 1 from the immersion holes 51 and the lightening holes 81, reducing the barrier of the support plate 8 and the adhesive strip 5 against the entry of electrolyte into the housing structure 4. The lightening holes 81 also reduce the weight of the support plate 8. The adhesive tape 5 does not need to be fixed on the pole core 1 and then the hole is formed, so that the production efficiency of the laminated battery is improved.
Further, referring to fig. 9 and 10, as an embodiment of the laminated battery pole core assembly provided by the present invention, one side of the supporting plate 8 is in contact with the pole core 1, and the adhesive tape 5 is located on the side of the supporting plate 8 opposite to the pole core 1, so as to improve the convenience of using the adhesive tape 5.
Further, referring to fig. 9 and 10, as a specific embodiment of the laminated battery pole core assembly provided by the present invention, two adhesive tapes 5 are provided, two support plates 8 are provided, the two adhesive tapes 5 are respectively corresponding to the support plates 8 one by one, the 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 an external force.
Referring to fig. 9 and 10, the present invention further provides a laminated battery, as an embodiment of the laminated battery provided by the present invention, the housing structure 4 of the laminated battery has the same structure as the housing structure 4 of the laminated battery, except 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 fixed to the supporting plate 8 by the adhesive tape 5, thereby improving the safety of the laminated battery in use
Referring to fig. 11, the present invention also 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 usage of the support plate for battery refers to the usage of the support plate 8 of the laminated battery pole core assembly, so the usage of the support plate for battery is not repeated.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A laminated battery pole piece assembly comprises a pole piece, wherein the pole piece 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 stacked 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 pole core winding bodies, wherein the supporting plate is arranged on at least one side of the pole core in the length direction, the pole core winding bodies are simultaneously spirally wound on the surfaces of the supporting plate and the pole core, and the adjacent pole core winding bodies in the spiral winding direction are arranged at intervals.
2. A laminated battery pole core assembly as in claim 1, wherein the pole core winding body is provided as a wound tape.
3. The laminated battery core assembly of claim 1 wherein there are two support plates located on either side of the core in the longitudinal direction.
4. A laminated battery core assembly as in claim 1 wherein the support plate has a plurality of lightening holes.
5. The laminated battery core assembly of claim 4, wherein the lightening holes are at least one of round holes, square holes or triangular holes.
6. A laminated battery comprising a housing structure, wherein the laminated battery further comprises a laminated battery core assembly of any of claims 1-5 mounted within the housing structure.
7. The laminated battery of claim 6, further comprising a housing winding spirally wound and covering the surface of the housing structure to form an insulating sealant.
8. A preparation process of a laminated battery pole core component is characterized by comprising 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 supporting plate is arranged on at least one side of the pole core in the length direction, a pole core winding body is simultaneously spirally wound on the surfaces of the supporting plate and the pole core to form a laminated battery pole core assembly, and the pole core winding bodies are arranged at intervals in the spiral winding direction.
9. The process for preparing a laminated battery core assembly according to claim 8, wherein the step of spirally winding a core winding body on the surface of the support plate and the core at the same time to form the laminated battery core assembly after the step of disposing the support plate on at least one side of the core in the longitudinal direction of the core, the step of disposing the core winding bodies adjacent to each other 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 by a cutting process.
10. A laminated battery pole piece assembly manufacturing process according to claim 8, wherein before the step of disposing the support plate on at least one side of the pole piece in the length direction, a pole piece winding body is simultaneously spirally wound on the surfaces of the support plate and the pole piece to form the laminated battery pole piece assembly, the step of disposing the adjacent pole piece winding bodies in the spiral winding direction at intervals is further included:
the support plate is provided with a plurality of lightening holes.
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| CN202011026570.XA CN112259835B (en) | 2020-09-25 | 2020-09-25 | Laminated battery pole core assembly, laminated battery and preparation process |
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| EP4109618A1 (en) * | 2021-06-25 | 2022-12-28 | Gree Altairnano New Energy Inc. | Lithium ion battery and electric car with the same |
| 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 |
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| EP4109618A1 (en) * | 2021-06-25 | 2022-12-28 | Gree Altairnano New Energy Inc. | Lithium ion battery and electric car with the same |
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| CN112259835B (en) | 2024-05-17 |
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