CN110048078A - Electrod assembly, electrode assembly, battery core, the preparation method of battery and electrod assembly - Google Patents
Electrod assembly, electrode assembly, battery core, the preparation method of battery and electrod assembly Download PDFInfo
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- CN110048078A CN110048078A CN201910438216.9A CN201910438216A CN110048078A CN 110048078 A CN110048078 A CN 110048078A CN 201910438216 A CN201910438216 A CN 201910438216A CN 110048078 A CN110048078 A CN 110048078A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 claims description 16
- 230000000712 assembly Effects 0.000 claims description 14
- 238000000429 assembly Methods 0.000 claims description 14
- 239000004744 fabric Substances 0.000 claims description 5
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- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000017260 vegetative to reproductive phase transition of meristem Effects 0.000 claims description 2
- 230000009471 action Effects 0.000 abstract description 9
- 230000004888 barrier function Effects 0.000 abstract description 8
- 239000003990 capacitor Substances 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 11
- 238000010276 construction Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000005253 cladding Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000007731 hot pressing Methods 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- -1 Polyethylene Terephthalate Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 244000223014 Syzygium aromaticum Species 0.000 description 1
- 235000016639 Syzygium aromaticum Nutrition 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
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- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/26—Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/52—Separators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
- H01G11/86—Processes for the manufacture of hybrid or EDL capacitors, or components thereof specially adapted for 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/46—Separators, membranes or diaphragms characterised by their combination with electrodes
-
- 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)
- Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
This application involves the preparation methods of a kind of electrod assembly, electrode assembly, battery core, battery and electrod assembly, belong to field of batteries.The electrod assembly includes the pole piece of the bag made of diaphragm and alternating alignment in each bag, in addition, may also be disposed with pole piece outside bag.Since pole piece is placed in bag, when electrod assembly is shaken, bag can play barrier action to pole piece, it prevents pole piece from skidding off out of bag, reduces because mobile dislocation bring coats inside pole piece, short-circuit risks, improve the safety of secondary cell and second capacitor.
Description
Technical field
The application belongs to field of batteries, and in particular to a kind of electrod assembly, electrode assembly, battery core, battery and electrod assembly
Preparation method.
Background technique
With the development of small type mobile devices (such as mobile phone, laptop, photograph/video camera) and the reinforcing of function,
And with the development of high-power mobile electrical equipment (such as unmanned plane, electric vehicle, hybrid-power electric vehicle), people set movement
The performance requirement of the standby energy is also higher and higher.
The current mobile device energy is mainly lithium ion/lighium polymer secondary battery and as the secondary of supplementary energy
Capacitor.All include electrod assembly in the inside of traditional secondary battery and second capacitor, nearly all includes in electrod assembly
Diaphragm, diaphragm is for separating positive/negative plate.However, work as secondary cell and second capacitor when being moved, electrod assembly
Internal pole piece is easy to misplace because of shaking, and then may cause the risk of positive and negative anodes short circuit, affects secondary cell
And the safety of second capacitor.
Summary of the invention
In view of this, the application's is designed to provide a kind of electrod assembly, electrode assembly, battery core, battery and electrode portion
The preparation method of part alleviates the problem that electrod assembly is easy to appear short circuit.
Embodiments herein is achieved in that
In a first aspect, the embodiment of the present application provides a kind of electrod assembly, the electrod assembly is with appointing in flowering structure
One is a kind of: structure A: the electrod assembly includes the 2n-1 bag formed by 2n layers of diaphragm, and hands in the 2n-1 bag
For the n positive plate and n-1 negative electrode tab of alignment, and it is each right in the outside of the bag of the bag and bottom that are located at top respectively
1 negative electrode tab arranged together；Structure B: the electrod assembly includes the 2n-1 bag formed by 2n layers of diaphragm, and described
Replace the n negative electrode tab and n-1 positive plate of alignment in 2n-1 bag, and respectively in the bag and bottom for being located at top
1 positive plate of each alignment in outside of bag；Structure C: the electrod assembly includes the 2n-1 bag formed by 2n layers of diaphragm,
And n negative electrode tab being alternately arranged in the 2n-1 bag and n-1 positive plate；Wherein, n is positive integer, and top layer
Diaphragm and lowest level diaphragm form closed cavity or semi-enclosed cavity, secondary upper layer diaphragm and time lower layer's diaphragm formed closed cavity or
Semi-enclosed cavity, and so on.For the pole piece being located in bag, when electrod assembly is shaken, each bag can be to pole piece
Barrier action is played, prevents pole piece from skidding off out of bag, is reduced because mobile dislocation bring coats inside pole piece, short-circuit wind
Danger.
Second aspect, the embodiment of the present application provide a kind of electrode assembly, including two kinds of electricity as described in first aspect
Pole component, and the quantity at least two of the electrod assembly；Described two electrod assemblies successively it is alternately laminated together, formed
The structure that positive/negative plate is alternately arranged；Or the electrode assembly further includes a continuous diaphragm, described two electrod assemblies
Coiling is successively replaced by the diaphragm, so that each of described two electrod assemblies electrod assembly separates each other,
Form the structure that positive/negative plate is alternately arranged.Barrier action due to the pole piece in electrod assembly by bag is not easy out of bag sliding
Out, it reduces because mobile dislocation bring coats inside pole piece, short-circuit risks, improves the safety of electrode assembly.
In conjunction with second aspect embodiment, in a kind of possible embodiment, when described two electrod assemblies successively replace
When stacked together, a kind of electrod assembly is the structure B, and another electrod assembly is the structure C.
In conjunction with second aspect embodiment, in a kind of possible embodiment, when the electrode assembly further includes the company
When continuous diaphragm, a kind of electrod assembly is the structure A, and another electrod assembly is the structure B.
In conjunction with second aspect embodiment, in a kind of possible embodiment, the continuous diaphragm with a direction or
Electrod assembly described in person's both direction coiling, so that swirl shape is presented in the continuous diaphragm after coiling.
In conjunction with second aspect embodiment, in a kind of possible embodiment, the continuous diaphragm is with Z-shaped coiling institute
State electrod assembly.
In conjunction with second aspect embodiment, in a kind of possible embodiment, the continuous diaphragm is with itself midpoint
Center winds the electrod assembly from the center with a direction.
The third aspect, the embodiment of the present application provides a kind of battery core, including shell and any one of such as second aspect can
Electrode assembly described in the embodiment of energy, the shell accommodate the electrode assembly.Due to the pole piece in electrod assembly by
The barrier action of bag, is not easy to skid off out of bag, reduces because the mobile dislocation bring cladding in pole piece inside, short-circuit risks, mention
The high safety of battery core.
Fourth aspect, the embodiment of the present application provide a kind of battery, including battery core described in the third aspect and shell,
The battery core is arranged in the shell.Barrier action due to the pole piece in electrod assembly by bag is not easy to skid off out of bag,
It reduces because mobile dislocation bring coats inside pole piece, short-circuit risks, improves the safety of battery.
5th aspect, the embodiment of the present application provide a kind of preparation method of electrod assembly, which comprises by multilayer
Diaphragm is arranged in parallel to form multiple interbeds；Pole piece is arranged in each interbed, or under lowest level diaphragm and every
Pole piece is arranged in a interbed, wherein arrange the mode of pole piece are as follows: arrange multiple positive plates in the same direction with same intervals
Or negative electrode tab, so that being in the polarity of the pole piece on each diaphragm or more both sides on the contrary, quantity is identical, and position one is a pair of
It answers；Arrange multiple pole pieces as top pole piece along the direction on top diaphragm；Wherein, the pole of the top pole piece
Property with the polarity of secondary top layer pole piece under the top diaphragm on the contrary, and the quantity of the top pole piece is described secondary
The half of the quantity of top layer pole piece, and position is corresponding；Using the width of every two column electrode as interval, along the direction by it is above-mentioned every
Film and above-mentioned pole piece are cut into multiple stacking segments, wherein each stacking segment have one in top described in most
Top layer pole piece, there are two pole pieces on other layers；By each stacking segment according to towards the direction pair of the top layer pole piece
It rolls over, so that the position of the positive plate and the negative electrode tab is corresponding in the stacking segment after doubling；After the doubling
The discontinuous diaphragm of stacking segment is sealed, then integral heat pressure, so that top layer's diaphragm and lowest level diaphragm are formed and closed
Cavity or semi-enclosed cavity, secondary upper layer diaphragm and time lower layer's diaphragm form closed cavity or semi-enclosed cavity, and so on.Due to
Barrier action of the pole piece by bag in electrod assembly, is not easy to skid off out of bag, reduces because of the mobile dislocation band in pole piece inside
Cladding, the short-circuit risks come, improve the safety of electrode assembly.
Other feature and advantage of the application will be illustrated in subsequent specification, also, partly be become from specification
It is clear that being understood and implementing the embodiment of the present application.The purpose of the application and other advantages can be by written
Specifically noted structure is achieved and obtained in specification and attached drawing.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the application
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.By the way that shown in attached drawing, above and other purpose, the feature and advantage of the application will be more clear.In whole
Identical appended drawing reference indicates identical part in attached drawing.Attached drawing, emphasis deliberately are not drawn by actual size equal proportion scaling
It is that the purport of the application is shown.
Fig. 1 shows a kind of one of the structural schematic diagram of electrod assembly provided by the embodiments of the present application；
Fig. 2 shows a kind of second structural representations of electrod assembly provided by the embodiments of the present application；
Fig. 3 shows a kind of third structural representation of electrod assembly provided by the embodiments of the present application；
Fig. 4 shows a kind of one of the preparation process figure of electrod assembly provided by the embodiments of the present application；
Fig. 5 shows the two of the preparation process figure of a kind of electrod assembly provided by the embodiments of the present application；
Fig. 6 shows the three of the preparation process figure of a kind of electrod assembly provided by the embodiments of the present application；
Fig. 7 shows the four of the structural schematic diagram of a kind of electrod assembly provided by the embodiments of the present application；
Fig. 8 shows the flow chart of the preparation method of electrod assembly provided by the embodiments of the present application；
Fig. 9 shows a kind of structural schematic diagram of electrode assembly that stepped construction is presented provided by the embodiments of the present application；
Figure 10 show it is provided by the embodiments of the present application it is a kind of present around volume structure electrode assembly structural schematic diagram it
One；
Figure 11 show it is provided by the embodiments of the present application it is a kind of present around volume structure electrode assembly structural schematic diagram it
Two；
Figure 12 show it is provided by the embodiments of the present application it is a kind of present around volume structure electrode assembly structural schematic diagram it
Three；
Figure 13 A shows a kind of one of the schematic diagram of coiling mode provided by the embodiments of the present application；
Figure 13 B shows the two of the schematic diagram of a kind of coiling mode provided by the embodiments of the present application；
Figure 14 shows the three of the schematic diagram of a kind of coiling mode provided by the embodiments of the present application；
Figure 15 shows the four of the schematic diagram of a kind of coiling mode provided by the embodiments of the present application；
Figure 16 shows a kind of structural schematic diagram of battery core provided by the embodiments of the present application.
Icon: 100- electrod assembly；110- diaphragm；111- bags；120- pole piece；121- positive plate；122- negative electrode tab；130-
Segment is laminated；Stacking segment after 131- doubling；200- electrode assembly；300- battery core；310- shell.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application is described.It is aobvious
So, described embodiments are some of the embodiments of the present invention, instead of all the embodiments.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
Meanwhile the terms "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion, to make
Obtaining the process, method, article or equipment including a series of elements not only includes those elements, but also including not arranging clearly
Other element out, or further include for elements inherent to such a process, method, article, or device.Not more
In the case where limitation, the element that is limited by sentence "including a ...", it is not excluded that including process, the side of the element
There is also other identical elements in method, article or equipment.
Furthermore term "and/or" in the application, only a kind of incidence relation for describing affiliated partner, expression can deposit
In three kinds of relationships, for example, A and/or B, can indicate: individualism A exists simultaneously A and B, these three situations of individualism B.
It is applicant by practicing for defect present in secondary cell in the prior art and second capacitor
And obtained after carefully studying as a result, therefore, the discovery procedure of the above problem and hereinafter the embodiment of the present application are for above-mentioned
The solution that problem is proposed all should be the contribution that applicant makes the application during the application.
To solve the above-mentioned problems, the embodiment of the present application provides a kind of electrod assembly, to reduce inside electrod assembly
Pole piece is because misplace and bring short-circuit risks.
In order to make it easy to understand, the structure of electrod assembly will be introduced below.
Please refer to Fig. 1, Fig. 2 and Fig. 3, in general, electrod assembly 100 may include formed by diaphragm 110 it is multiple
Bag 111, and the pole piece 120 being arranged in each bag 111.
Wherein, a pole piece 120 is set in each bag 111.The polarity of pole piece 120 can be positive (positive plate 121),
It can be cathode (negative electrode tab 122) that the polarity of the pole piece 120 in two neighboring bag 111 is on the contrary, i.e. positive plate 121 and negative electrode tab
122 successively alternately laminated arrangements.
Certainly, it is worth noting that, the position for each pole piece 120 being arranged in bag 111 is aligned.
According to the setting difference of 100 interior pole 120 of electrod assembly, electrod assembly 100 can have various structures, such as tie
Structure A, structure B and structure C.These three structures will be introduced respectively below.
Incorporated by reference to Fig. 1, in structure A, electrod assembly 100 includes 2n layers of diaphragm 110, and the 2n layers of diaphragm 110 can be formed
2n-1 bag 111, replacing alignment in 2n-1 bag 111 has n positive plate 121 and n-1 negative electrode tab 122, is being located at
Also each 1 negative electrode tab 122 of alignment in the outside of the bag 111 at top and the bag 111 positioned at bottom.Lead between bag 111 and bag 111
Hot pressing is crossed to be combined together.
In Fig. 1, n 2.Certainly, n can also be other positive integers, such as integer of the n between 2-10.It is worth pointing out
, in structure A, top layer's diaphragm 110 and lowest level diaphragm 110 surround closed cavity, secondary upper layer diaphragm 110 and time lower layer
Diaphragm 110 surrounds closed cavity, and so on.
Incorporated by reference to Fig. 2, in structure B, electrod assembly 100 includes 2n layers of diaphragm 110, and the 2n layers of diaphragm 110 can be formed
2n-1 bag 111.It is different from structure A, in structure B, replaces n negative electrode tab of alignment 122 and n- in 2n-1 bag 111
1 positive plate 121, in also each 1 positive plate of alignment in outside for the bag 111 and the bag 111 positioned at bottom for being located at top
121.Bag 111 is between bag 111 by together with hot binding.
In Fig. 2, n 2.Certainly, n can also be other positive integers, such as integer of the n between 2-10.It is worth pointing out
, in structure B, top layer's diaphragm 110 and lowest level diaphragm 110 surround closed cavity, secondary upper layer diaphragm 110 and time lower layer
Diaphragm 110 surrounds closed cavity, and so on.
Incorporated by reference to Fig. 3, in structure C, electrod assembly 100 includes 2n layers of diaphragm 110, and the 2n layers of diaphragm 110 can be formed
2n-1 bag 111.It is different from structure A and structure B, in structure C, replaces n negative electrode tab of alignment in 2n-1 bag 111
122 and n-1 positive plate 121.That is, in structure C, the bag 111 for being located at top and positioned at bottom bag 111 it is outer
Pole piece 120 is no longer arranged in portion.
In Fig. 3, n 2.Certainly, n can also be other positive integers, such as integer of the n between 2-10.It is worth pointing out
, in structure C, top layer's diaphragm 110 and lowest level diaphragm 110 form closed cavity, secondary upper layer diaphragm 110 and time lower layer
Diaphragm 110 forms closed cavity, and so on.
In three kinds of structures of electrod assembly 100, a closed cavity forms a bag 111 or two bags 111, such as
In structure A shown in Fig. 1, the closed cavity that secondary upper layer diaphragm 110 is surrounded with time lower layer's diaphragm 110 forms a bag 111, most
The closed cavity that upper layer diaphragm 110 and lowest level diaphragm 110 surround forms two bags 111.Pole piece 120 is placed in bag 111, can
To effectively prevent the dislocation due to caused by shaking.
The manufacture craft of three kinds of structures for electrod assembly 100 is introduced below, for ease of description, defining two
An interbed is formed between diaphragm 110.
Corresponding to structure A, the pole piece 120 on top diaphragm 110, the pole in each about 110 both sides of diaphragm are removed
The polarity of piece 120 is on the contrary, quantity is identical, and position corresponds；The polarity of pole piece 120 on top diaphragm 110 with
The polarity of secondary top layer pole piece 120 under top diaphragm 110 is on the contrary, and the quantity of top pole piece 120 is time top layer pole
The half of the quantity of piece 120, and position is corresponding.
In the arrangement stage of diaphragm 110 and pole piece 120, as an alternative embodiment, can be using arrangement pole piece
120 mode with arrangement diaphragm 110 alternately arranges pole piece 120-using arrangement pole piece 120-arrangement diaphragm 110-
Arrange the mode of diaphragm 110 ... arrangement pole piece 120-arrangement diaphragm 110-arrangement pole piece 120.
In this embodiment, by taking n=2 in Fig. 4 as an example, on a continuous assembly line, with PET (Polyethylene
Terephthalate, high temperature resistance polyester film) it is substrate (not shown), negative electrode tab is arranged with same intervals (such as 10mm)
122, then arrange diaphragm 110, then correspond to the location arrangements positive plate 121 of negative electrode tab 122 on diaphragm 110, then cloth again
One layer of diaphragm 110 is set, then in the top to arrange negative electrode tab 122 every the corresponding position of a pole piece 120.
Certainly, as another optional embodiment, in the arrangement stage of diaphragm 110 and pole piece 120, can also use
First arrange that multiple diaphragms 110 form the mode of interbeds, the rear mode for arranging pole piece 120, i.e., the cloth again after arranging diaphragm 110
Set pole piece 120.
In this embodiment, by taking n=2 in Fig. 4 as an example, on a continuous assembly line, two diaphragms 110 are first arranged,
So that an interbed is formed between two diaphragms 110, then again under lowest level diaphragm 110 with same intervals (such as 10mm)
Negative electrode tab 122 is arranged, then corresponding to the quantity of negative electrode tab 122 and location arrangements positive plate 121 in interbed, so that negative electrode tab
122 is identical as 121 quantity of positive plate, and position corresponds, then on top diaphragm 110 every a pole piece 120
Corresponding position arrange negative electrode tab 122.So that the quantity of the negative electrode tab 122 on top diaphragm 110 is the positive plate in interbed
The half of 121 quantity, and position is corresponding.
After the completion of diaphragm 110 and pole piece 120 are arranged, using the width of every two column pole piece 120 as interval, by above-mentioned diaphragm
110 and above-mentioned pole piece 120 along the dotted line in Fig. 4 be cut into multiple stacking segments 130.Wherein, each stacking segment 130 exists
There is a top pole piece 120 in top, there are two pole pieces 120 on other layers.
By each stacking segment 130 according to towards the direction of top layer pole piece 120 (arrow direction i.e. in figure) doubling, so that
In stacking segment 131 after doubling, the position of positive plate 121 and negative electrode tab 122 is corresponding.
After obtaining the stacking segment 131 after doubling, then by the discontinuous diaphragm 110 of the stacking segment 131 after doubling
It is sealed, forms bag 111.Pole piece 120 is wrapped in bag 111, not easily shifted.Then again by the stacking segment after heat-sealing
130 carry out integral heat pressure, to prevent outermost pole piece 120 from falling off.
Wherein, the temperature of hot pressing can be 45 DEG C~120 DEG C, and the temperature of heat-sealing can be 130 DEG C~250 DEG C.
Corresponding to structure B, Fig. 5 is please referred to, the main distinction point of manufacture craft and the manufacture craft of structure A is,
In structure B, the polarity of bottom pole piece 120 and top pole piece 120 is anode, and rest part is identical, to avoid repeating, herein
It is not described in detail.
Corresponding to structure C, Fig. 6 is please referred to, the main distinction point of manufacture craft and the manufacture craft of structure B is,
Pole piece 120 is not provided under lowest level diaphragm 110, rest part is identical.To avoid repeating, it is not described in detail herein.
In addition, as an alternative embodiment, for above structure A, structure B and structure C, top layer's diaphragm
110 can also form the semi-enclosed cavity as shown in Fig. 7 (Fig. 7 illustrates only structure A) with lowest level diaphragm 110, i.e., in bag
111 side is reserved with opening, but the degree being open is enough to play position-limiting action to the pole piece 120 being placed in bag 111.
In the electrod assembly 100 provided by the embodiment of the present application, since pole piece 120 is placed in bag 111,
When electrod assembly 100 is shaken, bag 111 can play barrier action to pole piece 120, prevent pole piece 120 sliding out of bag 111
Out, it reduces because mobile dislocation bring coats inside pole piece 120, short-circuit risks, improves secondary cell and secondary electricity
The safety of container.
Further, since diaphragm 110 can be shunk at high temperature, it is also possible to cause the risk of positive and negative anodes short circuit.Using the application
Preparation method, the fixed function that 111 pairs of pole pieces 120 of bag are played can diaphragm 110 be heat-shrinked when resistance be provided so that every
A possibility that film 110 is heat-shrinked and high temperature resistance is promoted, and positive plate 121 and negative electrode tab 122 contact reduction, it is short to reduce high temperature
Transportation work style danger, improves the high temperature safety of electrod assembly 100.
In addition, please referring to Fig. 8, the embodiment of the present application also provides a kind of preparation method of electrod assembly 100, this method packets
It includes:
Step S110: by the laminated diaphragm multiple interbeds of formation arranged in parallel.
Step S120: arranging pole piece in each interbed, or under lowest level diaphragm and between each described
Pole piece is arranged in layer, wherein arrange the mode of pole piece are as follows: arrange multiple positive plates or cathode in the same direction with same intervals
Piece, so that being in the polarity of the pole piece on each diaphragm or more both sides on the contrary, quantity is identical, and position corresponds.
Step S130: arrange multiple pole pieces as top pole piece along the direction on top diaphragm；Wherein, described
The polarity of top pole piece and the polarity of the secondary top layer pole piece under the top diaphragm are on the contrary, and the top pole piece
Quantity be the secondary top layer pole piece quantity half, and position is corresponding.
Step S140: using the width of every two column electrode as interval, above-mentioned diaphragm and above-mentioned pole piece are cut along the direction
It is segmented into multiple stacking segments, wherein each stacking segment has the top pole piece in top, in other layers
It is upper that there are two pole pieces.
Step S150: by each stacking segment according to the direction doubling towards the top layer pole piece, so that in doubling
In stacking segment afterwards, the position of the positive plate and the negative electrode tab is corresponding.
Certainly, as an alternative embodiment, in order to prevent doubling when cause the dislocation of positive/negative plate, can into
Before row doubling, each stacking segment is first subjected to integral heat pressure, so that the position of positive/negative plate keeps being relatively fixed.
Step S160: the discontinuous diaphragm of the stacking segment after the doubling being sealed, then integral heat pressure, so that
Top layer's diaphragm and lowest level diaphragm form closed cavity or semi-enclosed cavity, and secondary upper layer diaphragm and time lower layer's diaphragm, which are formed, to be closed
Cavity or semi-enclosed cavity, and so on.
Wherein, since this preparation process is when being prepared, 2 layers of diaphragm are at least used, the technique of multilayer bag making is compared
It is more efficient while guaranteeing same effect in the technique of conventional monolayers bag making, process is incorporated, energy consumption reduces.
The technical effect of the preparation method of electrod assembly 100 provided by the embodiment of the present application, realization principle and generation
Identical with aforementioned entities constructive embodiment, to briefly describe, embodiment of the method part does not refer to place, can refer to aforementioned entities knot
Corresponding contents in structure embodiment.
In addition, please referring to Fig. 9-Figure 12, the embodiment of the present application also provides a kind of electrode assemblies 200 comprising at least two
A electrod assembly 100.
Optionally, stepped construction can be presented in electrode assembly 200, i.e., structure shown in Fig. 9 can also be presented around clove hitch
Structure, i.e. structure shown in Figure 10-Figure 12.
As an alternative embodiment, Fig. 9 is please referred to, it is two different when electrode assembly 200 is stepped construction
Electrod assembly 100 successively it is alternately laminated together, form the structure that positive plate 121 and negative electrode tab 122 are alternately arranged.In this reality
Apply in mode, when two kinds of electrod assemblies 100 successively it is alternately laminated together when, a kind of electrod assembly 100 is structure B, another
Electrod assembly 100 is structure C.Certainly, the quantity of the electrod assembly 100 of stacking is not limited to shown in Fig. 96, electrode
The quantity of component 100 can also be more or less.
Auxiliary is used for bag 111 for fixing in stepped construction, and positive plate 121 and negative electrode tab 122 is avoided to shift,
It prevents diaphragm 110 from loosely folding and causes short circuit, avoid security risk.The stable structure of stepped construction, it is highly-safe, be conducive to protect
Demonstrate,prove the better quality of battery core 300.
As another optional embodiment, Figure 10-Figure 12 is please referred to, when electrode assembly 200 is around volume structure, electricity
Pole component 200 further includes a continuous diaphragm 110.Two kinds of electrod assemblies 100 successively replace coiling by continuous diaphragm 110,
So that each electrod assembly 100 in two kinds of electrod assemblies 100 separates each other, forms positive plate 121 and negative electrode tab 122 is handed over
For the structure of arrangement.In this embodiment, a kind of electrod assembly 100 is structure A, and another electrod assembly 100 is structure
B。
Wherein, please refer to Figure 13 A- Figure 15, the mode of coiling can also there are many.
In figure 13a, continuous diaphragm 110 is with each electrod assembly 100 of a direction (direction shown in arrow) coiling,
So that swirl shape is presented in the continuous diaphragm 110 after coiling.
In Figure 13 B, continuous diaphragm 110 with electrod assembly 100 described in both direction (direction shown in arrow) coiling,
So that swirl shape is presented in the continuous diaphragm 110 after coiling.
In Figure 14, continuous diaphragm 110 is with Z-shaped, coiling electrod assembly 100 as indicated by the arrows.
In Figure 15, continuous diaphragm 110 is centered on itself midpoint, from center with a direction (side shown in arrow
To) rolled electrode component 100.
In Figure 13 A- every kind of coiling mode shown in figure 15, only delineate with continuous 110 coiling of diaphragm 5 or
The case where 6 electrod assembly 100, certainly, in practical applications, the number for the electrod assembly 100 being coiled can be not limited to
This, it is clear that the more electrod assemblies 100 of coiling can also be continued in the same way.
In addition, please referring to Figure 16, the embodiment of the present application also provides a kind of battery cores 300, including shell 310 and above-mentioned reality
Apply the electrode assembly 200 in any embodiment, 310 accommodate electrod component 200 of shell.Wherein, shell 310 can be by plastic-aluminum
Film, steel shell or aluminum hull are made.
After preparing electrode assembly 200, it is 200 soldering polar ear of electrode assembly, is then placed in shell 310 through overstocked
The processes such as envelope, drying, liquid feeding, heat-sealing, chemical conversion, encapsulation, to obtain battery core 300.Above procedure is the conventional work of this field
Skill, details are not described herein.
In addition, the embodiment of the present application also provides a kind of battery, including the battery core 300 and shell in above-described embodiment,
Battery core 300 is arranged inside the shell.
It is worth noting that for security reasons, battery have when in use various protection circuits or other rise
To the electronic device of the effect of burning voltage or electric current.In this application, battery core 300 refers to not include the electrochemistry for protecting circuit
Components；And battery refers to the electrochemical assembly part including protecting circuit and battery core 300 substantially.Electronics device described herein
Part only refers to the purpose in protection battery core 300 and limits, the device of the effect of burning voltage or electric current.
In conclusion the embodiment of the present application provide a kind of electrod assembly 100, electrode assembly 200, battery core 300, battery and
The preparation method of electrod assembly 100, in electrod assembly 100, since pole piece 120 is placed in bag 111, work as electrode
When component 100 is shaken, bag 111 can play barrier action to pole piece 120, prevent pole piece 120 from skidding off out of bag 111, reduce
Because mobile dislocation bring cladding, short-circuit risks, improve the peace of secondary cell and second capacitor inside pole piece 120
Quan Xing.In addition, can provide resistance using the preparation method of the application when diaphragm 110 is heat-shrinked, improve electrod assembly
100 high temperature safety.Similarly, the electrode assembly 200 comprising the electrod assembly 100, battery core 300, battery also have accordingly
Higher safety.
The above, the only specific embodiment of the application, but the protection scope of the application is not limited thereto, it is any
Those familiar with the art within the technical scope of the present application, can easily think of the change or the replacement, and should all contain
Lid is within the scope of protection of this application.
It should be noted that all the embodiments in this specification are described in a progressive manner, each embodiment weight
Point explanation is the difference from other embodiments, and the same or similar parts between the embodiments can be referred to each other.
Claims (10)
1. a kind of electrod assembly, which is characterized in that the electrod assembly is with any in flowering structure:
Structure A: the electrod assembly includes the 2n-1 bag formed by 2n layers of diaphragm, and in the 2n-1 bag alternately pair
The n positive plate arranged together and n-1 negative electrode tab, and cloth is respectively aligned in the outside of the bag of the bag and bottom that are located at top respectively
1 negative electrode tab set；
Structure B: the electrod assembly includes the 2n-1 bag formed by 2n layers of diaphragm, and in the 2n-1 bag alternately pair
The n negative electrode tab arranged together and n-1 positive plate, and cloth is respectively aligned in the outside of the bag of the bag and bottom that are located at top respectively
1 positive plate set；
Structure C: the electrod assembly includes the 2n-1 bag formed by 2n layers of diaphragm, and replaces cloth in the 2n-1 bag
The n negative electrode tab set and n-1 positive plate；
Wherein, n is positive integer, and top layer's diaphragm and lowest level diaphragm form closed cavity or semi-enclosed cavity, secondary upper layer every
Film and time lower layer's diaphragm form closed cavity or semi-enclosed cavity, and so on.
2. a kind of electrode assembly, which is characterized in that including two kinds of electrod assemblies as described in claim 1, and the electrode
The quantity at least two of component；
Described two electrod assemblies successively it is alternately laminated together, form the structure that is alternately arranged of positive/negative plate；Or
The electrode assembly further includes a continuous diaphragm, and described two electrod assemblies successively replace coiling by the diaphragm,
So that each of described two electrod assemblies electrod assembly separates each other, the knot that positive/negative plate is alternately arranged is formed
Structure.
3. electrode assembly according to claim 2, which is characterized in that when described two electrod assemblies are successively alternately laminated in
When together, a kind of electrod assembly is the structure B, and another electrod assembly is the structure C.
4. electrode assembly according to claim 2, which is characterized in that when the electrode assembly further include it is described continuously every
When film, a kind of electrod assembly is the structure A, and another electrod assembly is the structure B.
5. electrode assembly according to claim 4, which is characterized in that the continuous diaphragm is with a direction or two
Electrod assembly described in the coiling of direction, so that swirl shape is presented in the continuous diaphragm after coiling.
6. electrode assembly according to claim 4, which is characterized in that the continuous diaphragm is with electricity described in Z-shaped coiling
Pole component.
7. electrode assembly according to claim 4, which is characterized in that the continuous diaphragm centered on itself midpoint,
The electrod assembly is wound from the center with a direction.
8. a kind of battery core, which is characterized in that the electrode assembly including shell and as described in any one of claim 2-7, institute
It states shell and accommodates the electrode assembly.
9. a kind of battery, which is characterized in that including the battery core and shell in such as claim 8, the battery core is arranged described
In shell.
10. a kind of preparation method of electrod assembly, which is characterized in that the described method includes:
By the laminated diaphragm multiple interbeds of formation arranged in parallel；
Pole piece is arranged in each interbed, or arranges pole piece under lowest level diaphragm and in each interbed,
Wherein, the mode of pole piece is arranged are as follows: multiple positive plates or negative electrode tab are arranged in the same direction with same intervals, so that in every
The polarity of the pole piece on both sides is on the contrary, quantity is identical above and below a diaphragm, and position corresponds；
Arrange multiple pole pieces as top pole piece along the direction on top diaphragm；Wherein, the top pole piece
The polarity of polarity and the secondary top layer pole piece under the top diaphragm is on the contrary, and the quantity of the top pole piece is described
The half of the quantity of secondary top layer pole piece, and position is corresponding；
Using the width of every two column electrode as interval, above-mentioned diaphragm and above-mentioned pole piece are cut into multiple laminates along the direction
Section, wherein each stacking segment has the top pole piece in top, and there are two pole pieces on other layers；
By each stacking segment according to the direction doubling towards the top layer pole piece, so that the stacking segment after doubling
In, the position of the positive plate and the negative electrode tab is corresponding；
The discontinuous diaphragm of stacking segment after the doubling is sealed, then integral heat pressure so that top layer's diaphragm with
Lowest level diaphragm forms closed cavity or semi-enclosed cavity, secondary upper layer diaphragm and time lower layer's diaphragm formation closed cavity or semiclosed
Cavity, and so on.
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| CN112310487A (en) * | 2019-07-31 | 2021-02-02 | 广东利元亨智能装备股份有限公司 | Lamination method |
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