CN113809480A - Battery pack production method - Google Patents
Battery pack production method Download PDFInfo
- Publication number
- CN113809480A CN113809480A CN202111214672.9A CN202111214672A CN113809480A CN 113809480 A CN113809480 A CN 113809480A CN 202111214672 A CN202111214672 A CN 202111214672A CN 113809480 A CN113809480 A CN 113809480A
- Authority
- CN
- China
- Prior art keywords
- battery
- stacking
- battery string
- interconnection
- string group
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 239000011521 glass Substances 0.000 claims abstract description 59
- 239000012943 hotmelt Substances 0.000 claims abstract description 34
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- 239000000853 adhesive Substances 0.000 claims abstract description 13
- 230000001070 adhesive effect Effects 0.000 claims abstract description 13
- 238000002844 melting Methods 0.000 claims abstract description 12
- 239000002390 adhesive tape Substances 0.000 claims abstract description 8
- 238000003466 welding Methods 0.000 claims abstract description 7
- 230000004927 fusion Effects 0.000 claims description 6
- 238000010030 laminating Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 3
- 238000001816 cooling Methods 0.000 description 6
- 239000005038 ethylene vinyl acetate Substances 0.000 description 6
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 6
- 238000005086 pumping Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 4
- -1 i.e. Polymers 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
Images
Classifications
-
- 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
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
-
- 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
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/507—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
-
- 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
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/514—Methods for interconnecting adjacent batteries or cells
- H01M50/517—Methods for interconnecting adjacent batteries or cells by fixing means, e.g. screws, rivets or bolts
-
- 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
Abstract
The invention provides a battery pack production method, which comprises the following steps: stacking a plurality of interconnection strips and battery string groups on a glass plate, wherein a conductive adhesive is arranged between the interconnection strips and the battery string groups, or the interconnection strips are bonded on the battery string groups through adhesive tapes; the battery string group comprises a plurality of parallel battery strings, a plurality of interconnection strips are arranged at intervals according to a preset distance and are all stacked in a direction perpendicular to the length direction of the battery strings in the battery string group, and the interconnection strips are in contact with welding strips stacked on battery pieces in the battery strings; stacking a heat-melting film on the battery string group, and stacking a back plate on the heat-melting film; and heating a stacked assembly formed by stacking the interconnection strips, the battery string groups, the hot-melt film and the back plate so that the hot-melt film is melted and the interconnection strips, the battery string groups and the back plate are bonded together. According to the technical scheme provided by the invention, the interconnection bars can be connected to the battery string group to form the battery assembly electrically connected in the transverse direction and the longitudinal direction.
Description
Technical Field
The invention relates to the technical field of battery production, in particular to a battery assembly production method.
Background
In the production process of the battery assembly, after welding the welding strips at the end parts of the plurality of battery strings and the bus bars to form a battery string group, a plurality of parallel interconnection bars need to be connected to the battery strings, and the interconnection bars are connected to the battery string group in a direction perpendicular to the width direction of the welding strips.
Therefore, it is desirable to provide a new manufacturing process that can attach the interconnection bars to the battery string.
Disclosure of Invention
It is an object of the present invention to provide a battery module production method capable of attaching interconnection bars to a cell string group to form a battery module electrically connected in the lateral and longitudinal directions.
In order to achieve the above object, the present invention provides a battery pack production method including:
stacking a plurality of interconnection strips and battery string groups on a glass plate, wherein a conductive adhesive is arranged between the interconnection strips and the battery string groups, or the interconnection strips are bonded on the battery string groups through adhesive tapes;
the battery string group comprises a plurality of parallel battery strings, a plurality of interconnection strips are stacked at intervals of a preset distance and are perpendicular to the length direction of the battery strings in the battery string group, and the interconnection strips are in contact with welding strips of the battery strings stacked on battery plates;
stacking a heat-releasing fusion film on the battery string group, and stacking a back plate on the heat-releasing fusion film;
and heating a stacked assembly formed by stacking the interconnection bar, the battery string group, the hot-melt film and the back plate so that the hot-melt film is melted, and the interconnection bar, the battery string group and the back plate are bonded together.
Preferably, the stacking of the plurality of interconnection bars and the battery string group on the glass plate includes:
arranging a plurality of interconnecting strips on the glass plate in parallel at intervals of a predetermined distance;
disposing a conductive adhesive on a surface of the interconnection bar facing the battery string;
stacking the battery string group on a plurality of the interconnection bars.
Preferably, the stacking of the plurality of interconnection bars and the battery string group on the glass plate includes:
placing a battery string on the glass plate;
stacking a plurality of interconnection bars on the battery string group, wherein a conductive adhesive is provided on lower surfaces of the interconnection bars.
Preferably, the stacking of the plurality of interconnection bars and the battery string group on the glass plate includes:
placing a battery string on the glass plate;
stacking a plurality of interconnection bars on the battery string group;
and bonding the interconnection strips on the battery string group through adhesive tapes.
Preferably, the battery module production method further includes: conveying the glass sheet from a first station to a second station, and conveying the glass sheet from the second station to a third station;
at the first station, performing the step of stacking the plurality of interconnection bars and the battery string groups on the glass plate;
at the second station, the step of stacking a heat-melting film on the battery string group and stacking a back plate on the heat-melting film is carried out;
at the third station, the step of heating a stacked assembly formed by stacking the interconnection bars, the battery string group, the hot-melt film, and the back sheet is performed.
Preferably, the heat-fusible film is configured such that the interconnection strips, the battery string set, the back sheet, and the glass sheet are bonded together after being melted.
Preferably, before the heating of the stacked assembly formed by stacking the interconnection bars, the cell string, the heat-fusible film, and the back sheet, the cell assembly production method further includes: and extracting the gas in the stacking assembly.
Preferably, the heating of the stacked assembly formed by stacking the interconnection bars, the battery string, the heat-fusible film, and the back sheet includes:
placing the stacked assembly into a laminator;
extracting gas from the stacking assembly in the laminating machine to heat the stacking assembly
According to the technical scheme provided by the invention, the battery string assembly electrically connected in the transverse direction and the longitudinal direction can be produced and formed by adhering the interconnection strips to the battery string set and hot melting the hot melting film.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention.
In the drawings:
fig. 1 is a schematic view of a method for producing a battery pack according to an embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting. The term "inside" and "outside" refer to the inside and the outside of the contour of each member itself.
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 at least one such feature.
The invention provides a battery pack production method, which comprises the following steps:
stacking a plurality of interconnection strips and battery string groups on a glass plate, wherein a conductive adhesive is arranged between the interconnection strips and the battery string groups, or the interconnection strips are bonded on the battery string groups through adhesive tapes;
the battery string group comprises a plurality of parallel battery strings, a plurality of interconnection strips are stacked at intervals of a preset distance and are perpendicular to the length direction of the battery strings in the battery string group, and the interconnection strips are in contact with welding strips of the battery strings stacked on battery plates;
stacking a heat-releasing fusion film on the battery string group, and stacking a back plate on the heat-releasing fusion film;
and heating a stacked assembly formed by stacking the interconnection bar, the battery string group, the hot-melt film and the back plate so that the hot-melt film is melted, and the interconnection bar, the battery string group and the back plate are bonded together.
Preferably, the heat-fusible film is configured such that the interconnection strips, the battery string set, the back sheet, and the glass sheet are bonded together after being melted. Specifically, after being melted, the hot-melt film penetrates through gaps between the battery pieces of the battery string set and/or falls onto the glass plate from the edges of the battery pieces, so that the interconnection strips, the battery string set, the back plate and the glass plate are bonded together.
According to the technical scheme provided by the invention, the battery string assembly electrically connected in the transverse direction and the longitudinal direction can be produced and formed by adhering the interconnection strips to the battery string set and hot melting the hot melting film.
Wherein the stacking of the plurality of interconnection bars and the battery string group on the glass plate may include:
arranging a plurality of interconnecting strips on the glass plate in parallel at intervals of a predetermined distance;
disposing a conductive adhesive on a surface of the interconnection bar facing the battery string;
stacking the battery string group on a plurality of the interconnection bars.
The stacking of the plurality of interconnection bars and the battery string group on the glass plate may also include:
placing a battery string on the glass plate;
stacking a plurality of interconnection bars on the battery string group, wherein a conductive adhesive is provided on lower surfaces of the interconnection bars.
The stacking of the plurality of interconnection bars and the battery string group on the glass plate may further include:
placing a battery string on the glass plate;
stacking a plurality of interconnection bars on the battery string group;
and bonding the interconnection strips on the battery string group through adhesive tapes.
The battery module production method further includes: conveying the glass sheet from a first station to a second station, and conveying the glass sheet from the second station to a third station;
at the first station, performing the step of stacking the plurality of interconnection bars and the battery string groups on the glass plate;
at the second station, the step of stacking a heat-melting film on the battery string group and stacking a back plate on the heat-melting film is carried out;
at the third station, the step of heating a stacked assembly formed by stacking the interconnection bars, the battery string group, the hot-melt film, and the back sheet is performed.
Before the heating of the stacked assembly formed by stacking the interconnection bars, the cell string, the heat-fusible film, and the back sheet, the method for producing a battery assembly further includes: extracting gas from the stacking assembly;
alternatively, the heating a stacked assembly formed by stacking the interconnection bars, the battery string, the hot-melt film, and the back sheet includes:
placing the stacked assembly into a laminator;
and in the laminating machine, extracting gas in the stacking assembly and heating the stacking assembly.
The following describes a method for producing a battery pack according to the present invention by way of specific embodiments.
The first embodiment:
placing the glass plate on a conveying belt and conveying the glass plate to a first station through the conveying belt;
arranging a plurality of interconnection bars on the glass plate at predetermined intervals in parallel at the first station, providing a conductive adhesive on surfaces of the interconnection bars facing the cell string groups, and then stacking the cell string groups on the plurality of interconnection bars;
conveying the glass plate to a second station with the glass plate;
at the second station, stacking a hot-melt film (the hot-melt film may be EVA, i.e., ethylene-vinyl acetate copolymer) on the cell string, and then stacking a back sheet on the hot-melt film;
conveying the glass sheet to a third station;
and at the third station, extracting gas in a stacked assembly formed by stacking the interconnection strips, the battery string group, the hot-melt film and the back plate, and then heating the stacked assembly to melt the hot-melt film, so that the battery string group, the back plate and the glass plate are bonded together.
Specifically, the glass plate on which the interconnection bar, the battery string group, the hot-melt film and the back plate are stacked may be conveyed into a laminator at a third station, and in the laminator, the stacking assembly is vacuumized to extract gas in the stacking assembly, and then heated to melt the hot-melt film, so as to bond the battery string group, the back plate and the glass plate together;
the bonded stack is cooled and removed from the laminator, or removed from the laminator and cooled.
Second embodiment:
placing a battery string on the glass plate;
conveying the glass plate bearing the battery string group to a first station;
stacking a plurality of interconnection bars having conductive adhesives disposed on lower surfaces thereof on the battery string at the first station;
conveying the glass sheet to a second station;
at the second station, stacking a hot-melt film (the hot-melt film may be EVA, i.e., ethylene-vinyl acetate copolymer) on the cell string, and then stacking a back sheet on the hot-melt film;
conveying the glass sheet into a laminator at a third station;
in the laminator, performing vacuum pumping operation on the stacked assembly consisting of the interconnection strips, the battery string group, the hot-melt film and the back plate, pumping out gas in the stacked assembly, heating to melt the hot-melt film, and bonding the battery string group, the back plate and the glass plate together;
cooling and removing the bonded stack assembly from the laminator, or cooling after removing the bonded stack assembly from the laminator.
The third embodiment:
conveying the glass plate to a first station;
placing the battery string group on a glass plate;
stacking a plurality of interconnection bars, the lower surfaces of which are provided with conductive adhesives, on the battery string group, stacking a hot-melt film on the battery string group, and then stacking a back plate on the hot-melt film;
conveying the glass sheet into a laminator at a second station;
in the laminator, performing vacuum pumping operation on the stacked assembly consisting of the interconnection strips, the battery string group, the hot-melt film and the back plate, pumping out gas in the stacked assembly, heating to melt the hot-melt film, and bonding the battery string group, the back plate and the glass plate together;
cooling and removing the bonded stack assembly from the laminator, or cooling after removing the bonded stack assembly from the laminator.
Fourth embodiment:
conveying the glass plate to a first station;
placing the battery string group on a glass plate;
bonding the interconnection strips to the battery string group through adhesive tapes;
conveying the glass sheet to a second station;
at the second station, stacking a hot-melt film (the hot-melt film can be EVA, ethylene-vinyl acetate copolymer) on the cell string group, and then stacking a back plate on the hot-melt film;
conveying the glass sheet into a laminator at a third station;
in the laminator, performing vacuum pumping operation on the stacked assembly consisting of the interconnection strips, the battery string group, the hot-melt film and the back plate, pumping out gas in the stacked assembly, heating to melt the hot-melt film, and bonding the battery string group, the back plate and the glass plate together;
cooling and removing the bonded stack assembly from the laminator, or cooling after removing the bonded stack assembly from the laminator.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple modifications can be made to the technical solution of the invention, including combinations of the individual specific technical features in any suitable way. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.
Claims (8)
1. A battery pack production method, characterized by comprising:
stacking a plurality of interconnection strips and battery string groups on a glass plate, wherein a conductive adhesive is arranged between the interconnection strips and the battery string groups, or the interconnection strips are bonded on the battery string groups through adhesive tapes;
the battery string group comprises a plurality of parallel battery strings, a plurality of interconnection strips are stacked at intervals of a preset distance and are perpendicular to the length direction of the battery strings in the battery string group, and the interconnection strips are in contact with welding strips of the battery strings stacked on battery plates;
stacking a heat-releasing fusion film on the battery string group, and stacking a back plate on the heat-releasing fusion film;
and heating a stacked assembly formed by stacking the interconnection bar, the battery string group, the hot-melt film and the back plate so that the hot-melt film is melted, and the interconnection bar, the battery string group and the back plate are bonded together.
2. The method of producing a battery pack according to claim 1, wherein the stacking of the plurality of interconnection bars and the battery string group on the glass plate comprises:
arranging a plurality of interconnecting strips on the glass plate in parallel at intervals of a predetermined distance;
disposing a conductive adhesive on a surface of the interconnection bar facing the battery string;
stacking the battery string group on a plurality of the interconnection bars.
3. The method of producing a battery pack according to claim 1, wherein the stacking of the plurality of interconnection bars and the battery string group on the glass plate comprises:
placing a battery string on the glass plate;
stacking a plurality of interconnection bars on the battery string group, wherein a conductive adhesive is provided on lower surfaces of the interconnection bars.
4. The method of producing a battery pack according to claim 1, wherein the stacking of the plurality of interconnection bars and the battery string group on the glass plate comprises:
placing a battery string on the glass plate;
stacking a plurality of interconnection bars on the battery string group;
and bonding the interconnection strips on the battery string group through adhesive tapes.
5. The battery module production method according to claim 1, further comprising: conveying the glass sheet from a first station to a second station, and conveying the glass sheet from the second station to a third station;
at the first station, performing the step of stacking the plurality of interconnection bars and the battery string groups on the glass plate;
at the second station, the step of stacking a heat-melting film on the battery string group and stacking a back plate on the heat-melting film is carried out;
at the third station, the step of heating a stacked assembly formed by stacking the interconnection bars, the battery string group, the hot-melt film, and the back sheet is performed.
6. The method for producing a battery pack according to any one of claims 1 to 5, wherein the heat-fusible film is provided such that the interconnecting strips, the cell string, the back sheet and the glass sheet are bonded together after being melted.
7. The battery module production method according to any one of claims 1 to 5, wherein, before the heating of the stacked module formed by stacking the interconnection strip, the cell string, the heat-fusible film and the back sheet, the battery module production method further comprises: and extracting the gas in the stacking assembly.
8. The method for producing a battery module according to any one of claims 1 to 5, wherein the heating of a stacked assembly formed by stacking the interconnect strip, the cell string, the heat-fusible film and the back sheet includes:
placing the stacked assembly into a laminator;
and in the laminating machine, extracting gas in the stacking assembly and heating the stacking assembly.
Priority Applications (1)
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CN202111214672.9A CN113809480A (en) | 2021-10-19 | 2021-10-19 | Battery pack production method |
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CN202111214672.9A CN113809480A (en) | 2021-10-19 | 2021-10-19 | Battery pack production method |
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