CN109332894A - The welding method of battery modules - Google Patents
The welding method of battery modules Download PDFInfo
- Publication number
- CN109332894A CN109332894A CN201811446228.8A CN201811446228A CN109332894A CN 109332894 A CN109332894 A CN 109332894A CN 201811446228 A CN201811446228 A CN 201811446228A CN 109332894 A CN109332894 A CN 109332894A
- Authority
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- China
- Prior art keywords
- busbar connector
- welding
- pole
- weldment
- battery modules
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- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/60—Preliminary treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
Abstract
Include at least following steps the invention discloses a kind of welding method of battery modules: the first busbar connector that the first pole with battery is connect and the second busbar connector connecting with the second pole of battery are divided into multiple regions；Successively by each region the first busbar connector and the welding of corresponding first pole, the second busbar connector weld with corresponding second pole；Until the first busbar connector and the welding of corresponding first pole, the second busbar connector in all regions are welded with corresponding second pole.Welding efficiency is not only increased as a result, simplifies welding procedure, and welding consistency, the stability in the region for keeping the first busbar connector opposite with the second busbar connector are higher.
Description
Technical field
The present invention relates to battery technology fields, more particularly, to a kind of welding method of battery modules.
Background technique
In the related technology, in battery pack, multiple battery modules are together in series by busbar connector, to export higher electricity
Pressure.The connection of busbar connector and battery core can use and the modes such as rivet, is bolted, welding.The connector of riveting and bolting can
It is inadequate by property, it may be loosened because of vibration, in turn result in battery pack internal resistance increase, cause the safety issues such as thermal failure.
That is, multiple battery modules are more electrically connected by the way of welding by battery modules is connected into battery pack, but
Be in the welding process of battery modules, need to weld tens of roads even road weld seams up to a hundred, the stability of welding quality and
The requirement of consistency is high, and once failure welding occurs in any road more in weld seam, all may cause entire battery modules
It is bad, even scrap.
Summary of the invention
The present invention is directed at least solve one of the technical problems existing in the prior art.For this purpose, one object of the present invention
It is to propose that a kind of welding method of battery modules of, the welding method can take into account welding quality and welding efficiency, guarantees weldering
Connect the stability and consistency of quality.
The welding method of battery modules according to an embodiment of the present invention includes at least following steps: by the first pole with battery
First busbar connector of column connection and the second busbar connector connecting with the second pole of battery are divided into multiple regions；It successively will be each
The first busbar connector and the welding of corresponding first pole, the second busbar connector in region are welded with corresponding second pole；Until institute
The first busbar connector and the welding of corresponding first pole, the second busbar connector in some regions are welded with corresponding second pole.
The welding method of battery modules according to an embodiment of the present invention not only can be improved welding efficiency, simplify welding journey
Sequence, and welding consistency, the stability in the region that the first busbar connector can be made opposite with the second busbar connector are higher.Namely
It says, takes into account welding efficiency and welding quality.
According to some embodiments of the present invention, the quantity of the first pole welded in each region is identical, Mei Gesuo
The quantity for stating the second pole welded in region is identical.
In some embodiments, the first weldment with first busbar connector welding is provided on first pole,
The second weldment with second busbar connector welding is provided on second pole.
Further, first busbar connector with a thickness of t1, first weldment with a thickness of t2, the t1And institute
State t2Meet: t1≤t2≤2t1；Second busbar connector with a thickness of t3, second weldment with a thickness of t4, the t3With
The t4Meet: t3≤t4≤2t3。
Further, the gap between first busbar connector and first weldment is t5, the t5Meet: t5≤
0.3mm and t5≤0.2t1；Gap between second busbar connector and second weldment is t6, the t6Meet: t6≤
0.3mm and t6≤0.2t3。
According to some embodiments of the present invention, the weld shape between first weldment and first busbar connector,
Weld shape between second weldment and second busbar connector is identical and is configured to broken line.
Further, the welding manner between first weldment and first busbar connector, second weldment
Welding manner between second busbar connector is Laser Welding.
Further, the marking lengths of the laser are n, and the length of first weldment and second weldment is equal
For L, meet between the n and the L: 0.9L≤n≤1.1L；The scribe widths of the laser be w, first weldment and
The width of second weldment is W, is met between the w and the W: 0.4W≤w≤0.6W.
Optionally, the spacing of the broken line is d, and the d meets: 0.9w≤d≤1.1w.
It according to some embodiments of the present invention, is 4800w-5800w for the output power of the laser-beam welding machine of Laser Welding,
Speed of welding is 180mm/s-220mm/s, defocusing amount 0-1mm.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 is the schematic diagram of battery modules according to an embodiment of the present invention；
Fig. 2 is the region division schematic diagram of battery modules according to an embodiment of the present invention；
Fig. 3 is the first busbar connector (the second busbar connector) and the first weldment of battery modules according to an embodiment of the present invention
The positional diagram of (the second weldment)；
Fig. 4 is the schematic diagram of the path of welding of battery modules according to an embodiment of the present invention in the welding process；
Fig. 5 is the first pole of battery modules according to an embodiment of the present invention and the distribution schematic diagram of the second pole.
Appended drawing reference:
First busbar connector 10, the second busbar connector 20, the first weldment 30, the second weldment 40,
The marking lengths n of laser, the scribe widths w of laser,
Broken line spacing d, total anode a, total cathode b.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and for explaining only the invention, and is not considered as limiting the invention.
The welding method of battery modules according to an embodiment of the present invention is described below with reference to Fig. 1-Fig. 5.
As depicted in figs. 1 and 2, the welding method of battery modules according to an embodiment of the present invention includes at least following steps:
The first busbar connector 10 that the first pole with battery is connect and the second busbar connector 20 connecting with the second pole of battery are divided
For multiple regions；Successively the first busbar connector 10 in each region is welded with corresponding first pole, the second busbar connector 30 with
Corresponding second pole welding；Until the first busbar connector 10 in all regions is welded with corresponding first pole, second converges
Stream row 20 welds with corresponding second pole.
Specifically, multiple regions to be successively named as to a-quadrant, B area, the region ... C, in order to those skilled in the art
The application is understood, the first busbar connector 10 in a-quadrant is welded with corresponding first pole, the second busbar connector 20 with it is right
The the second pole welding answered；The first busbar connector 10 in B area is welded with corresponding first pole, the second busbar connector 20 with it is right
The the second pole welding answered；The first busbar connector 10 in the region C is welded with corresponding first pole, the second busbar connector 20 with it is right
The the second pole welding ... answered；Until the first busbar connector 10 in all regions is welded with corresponding first pole, second converges
Stream row 20 welds with corresponding second pole.
It is understood that the first busbar connector 10 and the second pole peripheral hardware in battery are arranged outside the first pole of battery
Set the second busbar connector 20, thus by the first pole welding of the first busbar connector 10 and multiple batteries, by the second busbar connector 20 with it is more
Second pole of a battery electrode column welds, so that multiple batteries are in series or in parallel to constitute battery modules.
Wherein, the first busbar connector 10 and the second busbar connector 20 are first divided into multiple regions, divided first converges
10 regions opposite with divided second busbar connector 20 of stream row collectively constitute sequentially connected a-quadrant, B area, the region ... C,
To making the welding robot welded to busbar connector and battery electrode column, it is sequentially completed to a-quadrant, B area, the region ... C
Welding.
It should be noted that as shown in figure 5, multiple soft bag lithium ionic cells constitute the small mould group of a battery, multiple batteries
Small mould group is sequentially connected in series the battery modules in the present embodiment, and then the first pole for being located at the same side is welded to the first remittance
On stream row 10, the second pole for being located at the other side is welded on the second busbar connector 20.
That is, including at least partly Positive Poles and at least partly cathode in the first pole in some embodiments
Pole includes another part Positive Poles and another part negative pole in the second pole, thus by the way that multiple confluences are arranged
Row connect the anode of the small mould group of a battery in the adjacent small mould group of two batteries with the cathode of the small mould group of another battery,
To realize the series connection between the small mould group of multiple batteries, and one end of battery modules is made to be formed as total anode a, the corresponding shape of the other end
As total cathode b.In further embodiments, the number of single busbar connector is welded and fixed the first pole or the second pole compared with
It is few, and then Positive Poles or negative pole are only welded on each first busbar connector or the second busbar connector.
In other words, in some embodiments, it is welded on the first busbar connector 10 in any one region in multiple regions
(the first pole and the second pole in the i.e. same region are i.e. comprising positive pole for the Positive Poles and negative pole of equal amount
Column also includes negative pole), the negative pole and just of corresponding equal amount is welded on the second busbar connector 20 on the region
Pole pole；In further embodiments, anode is only welded on the first busbar connector 10 in any one region in multiple regions
(the first pole in the i.e. same region only includes Positive Poles or negative pole, the second pole for pole or negative pole
Only comprising negative pole or Positive Poles), equal amount is welded on first busbar connector 10 in another adjacent region
Negative pole or Positive Poles, and 10 phase of the first busbar connector with the region is welded on the second busbar connector 20 on the region
Equal number of negative poles or Positive Poles.
The welding method of battery modules according to an embodiment of the present invention divides the first busbar connector 10, the second busbar connector 20
Not only may be used with limiting a-quadrant, B area, the region ... C so that bonding machine be allow successively to weld to multiple regions in region
To improve welding efficiency, simplify welding procedure, and the region that the first busbar connector 10 can be made opposite with the second busbar connector 20
It is higher to weld consistency, stability.That is, taking into account welding efficiency and welding quality.
In specific embodiment shown in Fig. 2, the quantity of the first pole welded in each region is identical, each region
The quantity of second pole of middle welding is identical.
Specifically, the first pole in each region, which corresponds to, is formed by weld seam quantity on the first busbar connector 10, often
The quantity of the second pole in a region corresponds to and is formed by weld seam quantity on the second busbar connector 20, to make in multiple regions
The first pole quantity and the second pole quantity it is all the same, the weld seam quantity in multiple regions can be made identical.In this way, making to weld
The process to pick when being welded on each region is all the same, in the premise for the consistency and stability for guaranteeing welding quality
Under, keep welding procedure of the bonding machine when welding to different zones, speed of welding consistent, weldering can be further improved
Connect efficiency.
As shown in Fig. 2, the first weldment 30 with the welding of the first busbar connector 10 is provided on the first pole, on the second pole
It is provided with the second weldment 40 with the welding of the second busbar connector 20.
That is, a side of the first weldment 30 is connect with the first pole, another side of the first weldment 30
Face and the first busbar connector 10 are welded to connect, and a side of the second weldment 40 is connect with the second pole, the second weldment 40
Another side and the second busbar connector 20 are welded to connect.
In this way, can be that the first pole and first converge respectively by the first weldment 30 of setting and the second weldment 40
Accessible area when stream the 10, second pole of row is electrically connected with the second busbar connector 20 is bigger, can effectively improve the first confluence
The connective stability of row 10 and the first pole, the second busbar connector 20 and the second pole.
In specific embodiment shown in Fig. 3, the first busbar connector 10 with a thickness of t1, the first weldment 30 with a thickness of
t2, t1And t2Meet: t1≤t2≤2t1；Second busbar connector 20 with a thickness of t3, the second weldment 40 with a thickness of t4, t3And t4It is full
Foot: t3≤t4≤2t3；Gap between first busbar connector 10 and the first weldment 30 is t5, t5Meet: t5≤ 0.3mm and t5≤
0.2t1；Gap between second busbar connector 20 and the second weldment 40 is t6, t6Meet: t6≤ 0.3mm and t6≤0.2t3。
In this way, making the thickness of the first busbar connector 10 and the first weldment 30, the second busbar connector 20 and the second weldment 40 more
Adduction reason simultaneously has reasonable between the first busbar connector 10 and the first weldment 30, the second busbar connector 20 and the second weldment 40
Gap the defects of weld seam is perforated, further improves the first busbar connector 10 so as to be effectively prevented from welding process
With the welding quality of the first weldment 30, the second busbar connector 20 and the second weldment 40.
As shown in figure 4, weld shape, the second weldment 40 and second between the first weldment 30 and the first busbar connector 10
Weld shape between busbar connector 20 is identical and is configured to broken line.In this way, make the first weldment 30 and the first busbar connector 10 it
Between be formed by between the total length, the second weldment 40 and the second busbar connector 20 of weld seam and be formed by weld seam total length more
It is long, so as to avoid the first weldment 30 and the first busbar connector 10 or the second weldment 40 and the second busbar connector 20 indirect
It touches bad, to improve the quality of battery modules, avoids that battery modules are bad, even scrap.
Further, the welding manner between the first weldment 30 and the first busbar connector 10, the second weldment 40 and second
Welding manner between busbar connector 20 is Laser Welding.Based on Laser Welding welding precision with higher, and computer can be passed through
After programming, automation is welded.As a result, using Laser Welding to the first weldment 30 and the first busbar connector 10, the second weldment
40 are welded with the second busbar connector 20, and welding efficiency and welding quality can be further improved.
In specific embodiment shown in Fig. 4, the marking lengths of laser are n, the first weldment 30 and the second weldment
40 length is L, is met between n and L: 0.9L≤n≤1.1L；The scribe widths of laser are w, the first weldment 30 and second
The width of weldment 40 is W, is met between w and W: 0.4W≤w≤0.6W, and the spacing of broken line is d, and d meets: 0.9w≤d≤
1.1w。
In this way, making the length of the weld seam of fold-line-shaped, width and spacing more rationally, and further it is used in laser
The output power of the laser-beam welding machine of weldering is 4800w-5800w, speed of welding 180mm/s-220mm/s, defocusing amount 0mm-
1mm makes output power, speed of welding and the defocusing amount of bonding machine more rationally, thus make weld seam have 0.4mm-0.5 it
Between fusion penetration, the weld seam with 1.5mm-2.0mm, further improve welding quality.
In the following, the specific embodiment of 60 weld seams is shared with battery modules one, detailed description of the present invention battery modules
Welding method detailed process.
In the specific embodiment, battery modules are that 10 small battery cores connect to be formed, 10 first pole of the first busbar connector
Between between 30 weld seams, the second busbar connector 20 and the second pole have 30 arrive weld seam.
Firstly, the busbar connector of the battery modules is divided into a-e5 region, each welding region has 12 weld seams.
Wherein, the thickness 0.5mm of the first busbar connector 10 and the second busbar connector 20, the first weldment 30 and the second weldment
40 with a thickness of 0.5mm, both for Copper alloy material, and therebetween gap be 0~0.1mm.
And the output power of laser-beam welding machine is set as 4800 ± 50w, speed of welding is set as 210mm/s.Defocusing amount is set
It is set to+0.5mm, sets laser scribing length n=38mm, laser scribing width w=0.8mm, laser scribing broken line spacing d=
0.8mm。
In turn, according to above-mentioned setting welding parameter, which is put into welding shop or welding workstation, benefit
Battery modules are fixed with welding fixture, welding compression tooling is recycled to distinguish the first busbar connector 10 and the second busbar connector 20
It is pressed on the first weldment 30, on the second weldment 40, starts welding region a, the laser of laser-beam welding machine output is according to setting
Path of welding be radiated on the first busbar connector 10 and the second busbar connector 20,12 weld seams in a of region are successively welded.
Welding compression tooling is unclamped, and laser-beam welding machine is moved on welding region b, is compressed again according to same procedure
Welding region b and other welding regions, until completing the welding of entire battery modules.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In the description of the present invention, " fisrt feature ", " second feature " may include one or more of the features.
In the description of the present invention, the meaning of " plurality " is two or more.
In the description of the present invention, fisrt feature may include the first and second spies in second feature " on " or " under "
Sign directly contacts, and also may include that the first and second features are not direct contacts but are connect by the other feature between them
Touching.
In the description of the present invention, fisrt feature includes fisrt feature above the second feature " above ", " above " and " above "
Right above second feature and oblique upper, or first feature horizontal height is merely representative of higher than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ",
The description of " example ", " specific example " or " some examples " etc. means specific features described in conjunction with this embodiment or example, knot
Structure, material or feature are included at least one embodiment or example of the invention.In the present specification, to above-mentioned term
Schematic representation may not refer to the same embodiment or example.Moreover, specific features, structure, material or the spy of description
Point can be combined in any suitable manner in any one or more of the embodiments or examples.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not
A variety of change, modification, replacement and modification can be carried out to these embodiments in the case where being detached from the principle of the present invention and objective, this
The range of invention is defined by the claims and their equivalents.
Claims (10)
1. a kind of welding method of battery modules, which is characterized in that including at least following steps:
The first busbar connector that the first pole with battery is connect and the second busbar connector connecting with the second pole of battery are divided
For multiple regions；
Successively by each region the first busbar connector and the welding of corresponding first pole, the second busbar connector and corresponding second pole
Column welding；
Until the first busbar connector in all region is welded with corresponding first pole, the second busbar connector and corresponding second pole
Column welding.
2. the welding method of battery modules according to claim 1, which is characterized in that welded in each region
The quantity of one pole is identical, and the quantity of the second pole welded in each region is identical.
3. the welding method of battery modules according to claim 1, which is characterized in that be provided on first pole with
First weldment of first busbar connector welding is provided with second with second busbar connector welding on second pole
Weldment.
4. the welding method of battery modules according to claim 3, which is characterized in that first busbar connector with a thickness of
t1, first weldment with a thickness of t2, the t1With the t2Meet: t1≤t2≤2t1；
Second busbar connector with a thickness of t3, second weldment with a thickness of t4, the t3With the t4Meet: t3≤t4
≤2t3。
5. the welding method of battery modules according to claim 3, which is characterized in that first busbar connector and described the
Gap between one weldment is t5, the t5Meet: t5≤ 0.3mm and t5≤0.2t1；
Gap between second busbar connector and second weldment is t6, the t6Meet: t6≤ 0.3mm and t6≤
0.2t3。
6. the welding method of the battery modules according to any one of claim 3-5, which is characterized in that first welding
Weld shape, second weldment between part and first busbar connector and the weld shape between second busbar connector
It is identical and be configured to broken line.
7. the welding method of battery modules according to claim 6, which is characterized in that first weldment and described the
Welding manner, second weldment between one busbar connector and the welding manner between second busbar connector are Laser Welding.
8. the welding method of battery modules according to claim 7, which is characterized in that the marking lengths of the laser are n,
The length of first weldment and second weldment is L, is met between the n and the L: 0.9L≤n≤1.1L；
The scribe widths of the laser are w, and the width of first weldment and second weldment is W, the w and institute
It states and meets between W: 0.4W≤w≤0.6W.
9. the welding method of battery modules according to claim 7, which is characterized in that the spacing of the broken line is d, described
D meets: 0.9w≤d≤1.1w.
10. the welding method of battery modules according to claim 7, which is characterized in that the laser welding for Laser Welding
The output power of machine is 4800w-5800w, speed of welding 180mm/s-220mm/s, defocusing amount 0-1mm.
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| CN201811446228.8A CN109332894A (en) | 2018-11-29 | 2018-11-29 | The welding method of battery modules |
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| CN112099043A (en) * | 2020-08-21 | 2020-12-18 | 远景动力技术(江苏)有限公司 | Method for measuring gap and inclination angle of battery tab and battery piece and welding compensation method |
| CN113790673A (en) * | 2021-11-16 | 2021-12-14 | 江苏时代新能源科技有限公司 | Battery, power utilization device, welding deviation detection device and method |
| CN114799632A (en) * | 2022-04-28 | 2022-07-29 | 浙江零跑科技股份有限公司 | Dislocation welding method for battery module |
| CN114850668A (en) * | 2022-04-28 | 2022-08-05 | 浙江零跑科技股份有限公司 | Welding method for battery module |
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| CN113790673B (en) * | 2021-11-16 | 2022-04-01 | 江苏时代新能源科技有限公司 | Battery, power utilization device, welding deviation detection device and method |
| CN114799632A (en) * | 2022-04-28 | 2022-07-29 | 浙江零跑科技股份有限公司 | Dislocation welding method for battery module |
| CN114850668A (en) * | 2022-04-28 | 2022-08-05 | 浙江零跑科技股份有限公司 | Welding method for battery module |
| CN114850668B (en) * | 2022-04-28 | 2023-09-05 | 浙江零跑科技股份有限公司 | Welding method for battery module |
| CN114799632B (en) * | 2022-04-28 | 2023-09-05 | 浙江零跑科技股份有限公司 | Misplacement welding method for battery module |
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