CN110380100A - The manufacturing method of battery core - Google Patents
The manufacturing method of battery core Download PDFInfo
- Publication number
- CN110380100A CN110380100A CN201910672995.9A CN201910672995A CN110380100A CN 110380100 A CN110380100 A CN 110380100A CN 201910672995 A CN201910672995 A CN 201910672995A CN 110380100 A CN110380100 A CN 110380100A
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- Prior art keywords
- pole group
- pole
- battery core
- area
- insulating layer
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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
- H01M10/0404—Machines for assembling batteries
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/005—Devices for making primary cells
-
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The present invention provides a kind of manufacturing method of battery core, the manufacturing method of battery core is the following steps are included: stacking gradually anode pole piece, isolation film, cathode pole piece for pole group；In the appearance face paste insulating layer of the pole group；Multiple pole groups are connected as pole group component；In the appearance face paste bundled piece of the pole group component；The pole group component is mounted in the shell of the battery core.The battery core produced by the manufacturing method can prevent pole piece from deviating from, also pole piece staggered floor can be prevented, short circuit can occur to avoid battery core, so as to promote the safety in utilization of battery core, the planarization of battery core can also be promoted, also, after the appearance face paste insulating layer of pole group, it can enter inside the group of pole to avoid welding dust.
Description
Technical field
The present invention relates to battery technology field, in particular to a kind of manufacturing method of battery core.
Background technique
In the related technology, after anode pole piece, cathode pole piece and separating film layer are stacked as pole group, the appearance face paste binding of group in pole
Part not can avoid pole piece abjection in pole during group thermocompression forming, and the pole group bad for hot pressing effect, pole piece are easy mistake
Layer, causes battery core to be easy to happen short circuit.Also, after bundled piece is attached to the outer surface of pole group, stress is big at the tightening point of bundled piece,
Lead to entire pole group discontinuity, after the group thermocompression forming of pole, bundled piece attachment will appear diaphragm fold.Meanwhile it is existing
After bundled piece is attached in the group of pole, cause binding point region pole group stress big, it is compact-sized, without bundling point region pole group stress
Small, structure pine, the battery core planarization produced is poor, influences the service performance of battery core.
Summary of the invention
In view of this, the present invention is directed to propose a kind of manufacturing method of battery core, is easy to happen mistake to solve battery core interior pole
Layer problem.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of manufacturing method of battery core is the following steps are included: stacking gradually anode pole piece, isolation film, cathode pole piece for pole
Group；In the appearance face paste insulating layer of the pole group；Multiple pole groups are connected as pole group component；In the outer of the pole group component
Paste bundled piece in surface；The pole group component is mounted in the shell of the battery core.
It in some examples of the invention, include: the insulating layer point " in the appearance face paste insulating layer of the pole group "
It is cut into first area insulating layer, second area insulating layer and third region insulation layer, the first area insulating layer, described second
Region insulation layer and the third region insulation layer are attached to first area, second area and the third region of the pole group respectively.
In some examples of the invention, the first area and the second area are arranged side by side and from the pole groups
First end is disposed to extend to second end, and the third region is arranged in juxtaposition with the first area and the second area.
In some examples of the invention, the length of the pole group is W, and the width of the pole group is H1+H2, the pole group
With a thickness of h, the width of the first area insulating layer and the second area insulating layer is H2, the first area insulation
The length of layer and the second area insulating layer is W+h, and the principal length of the third region insulation layer is W, the third
The body width of region insulation layer is 2H1+h, and the two sides of the main body are provided with the insulating sublayer that width is H1, a length of h
Layer.
In some examples of the invention, on the length direction of the pole group, the first area and secondth area
Domain is symmetrical.
In some examples of the invention, " multiple pole groups are connected as pole group component " includes, multiple poles
Group stacks gradually and is welded as the pole group component.
In some examples of the invention, on the thickness direction of the pole group component, the bundled piece is from the pole group
The upper surface of component extends to the lower surface of the pole group component.
In some examples of the invention, the width of the bundled piece is H3, meets relational expression: 9mm≤H3≤11mm.
In some examples of the invention, the bundled piece is multiple, in the circumferential direction of the pole group component, Duo Gesuo
It is arranged spaced apart to state bundled piece.
In some examples of the invention, the length of the pole group is W, and the width of the pole group is H1+H2, along the pole
End to the pole group module edge length of the bundled piece being arranged in group width direction, the bundled piece is (H1+H2-
2H3)/3mm；The bundled piece being arranged along the pole group length direction, the end of the bundled piece to the pole group component
Edge length is (W-2H3)/3mm.
Compared with the existing technology, the manufacturing method of battery core of the present invention has the advantage that
The manufacturing method of battery core according to the present invention, the battery core produced by the manufacturing method can prevent pole piece de-
Out, pole piece staggered floor can be also prevented, short circuit can occur to avoid battery core, it, can also so as to promote the safety in utilization of battery core
To promote the planarization of battery core, also, after the appearance face paste insulating layer of pole group, can enter in the group of pole to avoid welding dust
Portion.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of manufacturing method described in the embodiment of the present invention；
Fig. 2 is the flow chart of manufacturing method described in the embodiment of the present invention；
Fig. 3 is that insulating layer described in the embodiment of the present invention is attached to the schematic diagram on the outer surface of pole group；
Fig. 4 is that bundled piece described in the embodiment of the present invention is attached to the schematic diagram in the group module outer surface of pole；
Fig. 5 is the expanded schematic diagram of first area insulating layer described in the embodiment of the present invention；
Fig. 6 is the expanded schematic diagram of third region insulation layer described in the embodiment of the present invention；
Fig. 7 is the top view of pole group described in the embodiment of the present invention.
Description of symbols:
Pole group 1；First end 11；Second end 12；First area 13；Second area 14；Third region 15
Insulating layer 2；First area insulating layer 21；Second area insulating layer 22；Third region insulation layer 23；
Pole group component 3；Upper surface 31；
Bundled piece 4；Tab 5.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
When producing battery core using existing manufacturing method, thermocompression forming can be carried out to pole group, pole group be carried out before hot pressing pre-
Hot 15-30min makes pole group inside and outside temperature increase softening organic binder polymer coating granule, then presses in high pressure 2-3T
Hot pressing is carried out under power, make it is well-bonded between isolation film and pole piece, but due to organic binder polymer coating granule
Solidification, even if failing to reach good bond effect under hot pressing condition, still has the generation of isolation film Yu pole piece staggered floor, in the feelings
Under condition, the adhesion strength between coating and pole piece is weakened, and the coating power for inhibiting isolation film to be heat-shrinked reduces, to be difficult to prevent battery core
Short circuit after overheat between anode pole piece and cathode pole piece, especially battery are applied on vehicle, when vehicle vibration or collision
When generation, staggered floor easily occurs between the pole piece of inside battery, cell safety is impacted.
Also, in existing battery core assembly process, after the completion of anode pole piece, isolation film, cathode pole piece lamination, in the group of pole
Bundled piece is pasted, the conjunction core that pole group is carried out after the completion of group 1 is welded in pole pastes bundled piece, and before group enters shell in pole, patch is exhausted on pole group surface
Edge layer.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in Fig. 1-Fig. 7, the manufacturing method of battery core according to an embodiment of the present invention is the following steps are included: by positive pole
Piece, isolation film, cathode pole piece stack gradually as pole group 1, and then in the appearance face paste insulating layer 2 of pole group 1, insulating layer 2 can be
Then multiple pole groups 1 are connected as pole group component 3 by insulating tape, then in the appearance face paste bundled piece 4 of pole group component 3, binding
Part 4 can be binding adhesive tape, and finally pole group component 3 is mounted in the shell of battery core.
Wherein, when producing battery core using the manufacturing method of the application, anode pole piece, isolation film, cathode pole piece are laminated for
After pole group 1, insulating layer 2 is first pasted on the outer surface of pole group 1, later in the appearance face paste bundled piece 4 of pole group component 3, then will
Pole group component 3 is mounted in the shell of battery core.Setting can be saved after pole group component 3 closes core and be pasted absolutely on pole group component 3 in this way
After the process of edge layer 2 can promote the production efficiency of battery core, also, anode pole piece, isolation film, cathode pole piece are laminated for pole group 1
Insulating layer 2 is directly pasted, group 1 even uniform in pole can be wrapped up, the stress equalization of pole group 1, experiment proves that, it can make
The structure of pole group 1 is more compact, so as to prevent pole piece from deviating from, is also possible to prevent pole piece staggered floor, and then can be to avoid battery core
Short circuit occurs, the safety in utilization of battery core can also be promoted, meanwhile, it also can be avoided welding dust and enter inside pole group 1, it can be with
Guarantee the functional reliability of battery core.In addition, pole group component 3 can be made by uniform after bundled piece 4 is attached on pole group component 3
Seizing force can promote the planarization of battery core, thereby may be ensured that the service performance of battery core.
The battery core produced as a result, by the manufacturing method can prevent pole piece from deviating from, and can also prevent pole piece staggered floor, can
Short circuit occurs to avoid battery core, so as to promote the safety in utilization of battery core, the planarization of battery core can also be promoted, also,
After the appearance face paste insulating layer 2 of pole group 1, it can enter inside pole group 1 to avoid welding dust.
In some embodiments of the invention, as shown in Figure 3, Figure 5 and Figure 6, " the appearance face paste insulating layer 2 of group 1 in pole "
It may include: that insulating layer 2 is divided into first area insulating layer 21, second area insulating layer 22 and third region insulation layer 23,
First area insulating layer 21, second area insulating layer 22 and third region insulation layer 23 be attached to respectively pole group 1 first area 13,
On second area 14 and third region 15, the entire outer surface of pole group 1 all can be sticked insulating layer 2 substantially by such setting, can
With the more consolidation for wrapping up pole group 1, so as to be better protected from pole piece staggered floor, the flat of pole group 1 can also be better ensured that
Whole property.Also, insulating layer 2 has insulation performance, can leak electricity to avoid battery core or short circuit occurs, so as to be further ensured that
The safety in utilization of battery core.
In some embodiments of the invention, as shown in fig. 7, first area 13 and second area 14 are arranged side by side, and
First area 13 and second area 14 are disposed to extend from the first end 11 of pole group 1 to second end 12, third region 15 and first
Region 13 and second area 14 are arranged in juxtaposition, wherein the first end 11 of pole group 1 refers to the front end in Fig. 7, the second end of pole group 1
12 refer to the rear end in Fig. 3, and setting in this way can guarantee that insulating layer 2 is attached to the entire outer surface of pole group 1, so as to so that first
The position in region 13, second area 14 and third region 15 is more reasonable.
In some embodiments of the invention, as shown in Figure 3, Figure 5 and Figure 6, the length of pole group 1 is W, the width of pole group 1
For H1+H2, pole group 1 with a thickness of h, the width of first area insulating layer 21 and second area insulating layer 22 is H2, the firstth area
The length of domain insulating layer 21 and second area insulating layer 22 is W+h, and the principal length of third region insulation layer 23 is W, third
The body width of region insulation layer 23 is 2H1+h, and the two sides of main body are provided with the insulating sublayer layer 2 that width is H1, a length of h,
Wherein, the width of first area 13 and second area 14 is H2, and the length of first area 13 and second area 14 is W+h,
The body length in third region 15 is W, and the body width in third region 15 is 2H1+h, and the two sides of ontology are provided with width
For the subregion of H1, a length of h, such setting can make area phase of the area of first area insulating layer 21 with first area 13
Deng can also make the area of second area insulating layer 22 and the area equation of second area 14, additionally it is possible to make third region insulation
The area of layer 23 and the area equation in third region 15, can be by first area insulating layer 21, second area insulating layer 22, third
Region insulation layer 23 is attached to entire first area 13, second area 14, on third region 15 respectively.
In some embodiments of the invention, as shown in fig. 7, on the length direction of pole group 1, first area 13 and second
Region 14 is symmetrical, it should be noted that the length direction of pole group 1 refers to the left and right directions in Fig. 7, and setting in this way can make first
The area equation in region 13 and second area 14 can make pole group 1 after insulating layer 2 is attached to first area 13 and second area 14
Stress is more balanced, so as to further prevent pole piece staggered floor.
In some embodiments of the invention, " multiple pole groups 1 are connected as pole group component 3 " may include, multiple poles
Group 1 stacks gradually together and is welded as pole group component 3, it is to be understood that after the complete insulating layer 2 of appearance face paste of pole group 1,
Multiple pole groups 1 are stacked together, such as: it is stacked together by two, two pole groups 1 are then welded together to form pole again
Group component 3, so as to realize the work purpose of production pole group component 3.
In some embodiments of the invention, as shown in figure 4, on the thickness direction of pole group component 3, bundled piece 4 is from pole
The upper surface 31 of group component 3 extends the lower surface for extremely organizing component 3, and multiple pole group components 3 can be bundled in one by such setting
It rises, can be separated from each other to avoid multiple pole group components 3, so as to promote the overall structural strength of multiple pole group components 3, and
And can also make the structure of pole group component 3 more compact, pole piece staggered floor can be further prevented.
In some embodiments of the invention, as shown in figure 4, the width of bundled piece 4 is set as H3, meet relational expression: 9mm
≤ H3≤11mm, such as: 10mm is set by the width of bundled piece 4, such setting can guarantee that bundled piece 4 has enough width
Degree, it is ensured that 4 pairs of pole group components 3 of bundled piece have enough compression areas, thereby may be ensured that the structure of pole group component 3 is strong
Degree, also, due to the effect of power be it is mutual, bundled piece 4 compress pole group component 3 when, pole group component 3 can also give bundled piece 4 one
A power, in this way setting can guarantee the structural strength of bundled piece 4, and bundled piece 4 can be prevented to be broken, thereby may be ensured that bundled piece
4 functional reliability.
In some embodiments of the invention, bundled piece 4 can be set to multiple, and in pole, the circumferential direction of group component 3, more
A bundled piece 4 is arranged spaced apart, as shown in figure 4, the left and right side of pole group component 3 can be set, there are two bundled piece 4, poles
Two bundled pieces 4 in the left side of group component 3 are uniformly distributed in the left side of pole group component 3, two bundles on the right side of pole group component 3
The right side that part 4 is uniformly distributed in pole group component 3 is tied up, a bundled piece 4, bundled piece 4 has can be set in the front side of pole group component 3
Between two tabs 5 and it is located at the front side middle position of pole group component 3, there are two the rear side of pole group component 3 can be set
Bundled piece 4, two bundled pieces 4 of the rear side of pole group component 3 are uniformly distributed in the rear side of pole group component 3.Such setting can
It is further ensured that 4 pairs of pole group components 3 of bundled piece have enough compression areas, so as to be further ensured that pole group component 3
Structural strength, and then pole piece staggered floor can be further prevented.
In some embodiments of the invention, as shown in figure 4, the length of pole group 1 is W, the width of pole group 1 is H1+H2, edge
In 1 width direction of pole group be spaced apart setting bundled piece 4, the end of bundled piece 4 extremely organize 1 edge length be (H1+H2-2H3)/
3mm, is spaced apart the bundled piece 4 of setting along 1 length direction of pole group, and the end of bundled piece 4 extremely 3 edge length of component is
(W-2H3)/3mm, in this way setting can guarantee the bonding area of bundled piece 4 Yu pole group component 3, can be to avoid bundled piece 4 from pole
It falls off on group component 3, thereby may be ensured that the stickup reliability of bundled piece 4.
Understand the manufacturing method of the application in detail below according to Fig. 2.
Anode pole piece, isolation film, cathode pole piece stack gradually as after pole group 1, the appearance face paste insulating layer 2 of group 1 in pole, so
Pole group 1 is preheated afterwards, hot-pressing processing make pole group 1 be formed, then to multiple pole groups 1 carry out pole group prewelding, then to multiple
Pole group 1 carries out short-circuit detecting, and tab 5 is then cut in pole group 1, then carries out ultrasound weldering eventually, then carries out weldering print rubberizing, so
Welding plate welding is carried out afterwards, and multiple pole groups 1 are linked together, multiple pole groups 1 are then laminated for pole group component 3, then in pole
Pole group component 3, is then assembled in shell by group 3 outer patch bundled piece 4 of component, then carries out cover plate perimeter weldering, then detection electricity
Core whether leakage, finally the stamp in battery core, completes the production of battery core.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of manufacturing method of battery core, which comprises the following steps:
Anode pole piece, isolation film, cathode pole piece are stacked gradually as pole group (1)；
In the appearance face paste insulating layer (2) of the pole group (1)；
Multiple pole groups (1) are connected as pole group component (3)；
In the appearance face paste bundled piece (4) of the pole group component (3)；
The pole group component (3) is mounted in the shell of the battery core.
2. the manufacturing method of battery core according to claim 1, which is characterized in that " exhausted in the appearance face paste of the pole group (1)
Edge layer (2) " includes: that the insulating layer (2) is divided into first area insulating layer (21), second area insulating layer (22) and third
Region insulation layer (23), the first area insulating layer (21), the second area insulating layer (22) and the third region are exhausted
Edge layer (23) is attached to the first area (13) of the pole group (1), second area (14) and third region (15) respectively.
3. the manufacturing method of battery core according to claim 2, which is characterized in that the first area (13) and described second
Region (14) is arranged side by side and is disposed to extend from the first end (11) of the pole group (1) to second end (12), the third region
(15) it is arranged in juxtaposition with the first area (13) and the second area (14).
4. the manufacturing method of battery core according to claim 3, which is characterized in that the length of the pole group (1) is W, described
The width of pole group (1) be H1+H2, the pole group (1) with a thickness of h, the first area insulating layer (21) and secondth area
The width of domain insulating layer (22) is H2, the length of the first area insulating layer (21) and the second area insulating layer (22)
It is W+h, the principal length of the third region insulation layer (23) is W, the main body of the third region insulation layer (23)
Width is 2H1+h, and the two sides of the main body are provided with the insulating sublayer layer (2) that width is H1, a length of h.
5. the manufacturing method of battery core according to claim 3, which is characterized in that on the length direction of the pole group (1),
The first area (13) and the second area (14) are symmetrical.
6. the manufacturing method of battery core according to claim 1, which is characterized in that " multiple pole groups (1) are connected as pole
Group component (3) " includes that multiple pole groups (1) are stacked gradually and are welded as the pole group component (3).
7. the manufacturing method of battery core according to claim 6, which is characterized in that in the thickness side of the pole group component (3)
Upwards, the bundled piece (4) extends to the lower surface of the pole group component (3) from the upper surface (31) of the pole group component (3).
8. the manufacturing method of battery core according to claim 6, which is characterized in that the width of the bundled piece (4) is H3, full
Sufficient relational expression: 9mm≤H3≤11mm.
9. the manufacturing method of battery core according to claim 8, which is characterized in that the bundled piece (4) be it is multiple, described
The circumferential direction of pole group component (3), multiple bundled pieces (4) are arranged spaced apart.
10. the manufacturing method of battery core according to claim 9, which is characterized in that the length of the pole group (1) is W, described
The width of pole group (1) is H1+H2, the bundled piece (4) being arranged in pole group (1) width direction, the bundled piece (4)
End to pole group component (3) edge length be (H1+H2-2H3)/3mm；
The bundled piece (4) being arranged along pole group (1) length direction, the end of the bundled piece (4) to the pole group
Component (3) edge length is (W-2H3)/3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910672995.9A CN110380100B (en) | 2019-07-24 | 2019-07-24 | Method for manufacturing battery cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910672995.9A CN110380100B (en) | 2019-07-24 | 2019-07-24 | Method for manufacturing battery cell |
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| Publication Number | Publication Date |
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| CN110380100A true CN110380100A (en) | 2019-10-25 |
| CN110380100B CN110380100B (en) | 2021-05-25 |
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ID=68255726
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| CN201910672995.9A Active CN110380100B (en) | 2019-07-24 | 2019-07-24 | Method for manufacturing battery cell |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111293347A (en) * | 2020-04-08 | 2020-06-16 | 湖北亿纬动力有限公司 | Battery production process |
| CN114006053A (en) * | 2021-10-29 | 2022-02-01 | 蜂巢能源科技有限公司 | Lithium ion battery assembly process and lithium ion battery |
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| CN104488129A (en) * | 2013-02-15 | 2015-04-01 | 株式会社Lg化学 | Electrode assembly |
| JP2019096392A (en) * | 2017-11-17 | 2019-06-20 | 株式会社豊田自動織機 | Manufacturing method of bipolar battery |
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| CN202019028U (en) * | 2011-01-26 | 2011-10-26 | 惠州Tcl金能电池有限公司 | Cell core of lithium cell and lithium cell |
| CN104303332A (en) * | 2012-04-05 | 2015-01-21 | 株式会社Lg化学 | Battery cell having stair-like structure |
| CN104488129A (en) * | 2013-02-15 | 2015-04-01 | 株式会社Lg化学 | Electrode assembly |
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| CN111293347A (en) * | 2020-04-08 | 2020-06-16 | 湖北亿纬动力有限公司 | Battery production process |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN110380100B (en) | 2021-05-25 |
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