CN110571400A - power battery module bus bar and welding method thereof - Google Patents
power battery module bus bar and welding method thereof Download PDFInfo
- Publication number
- CN110571400A CN110571400A CN201910890933.5A CN201910890933A CN110571400A CN 110571400 A CN110571400 A CN 110571400A CN 201910890933 A CN201910890933 A CN 201910890933A CN 110571400 A CN110571400 A CN 110571400A
- Authority
- CN
- China
- Prior art keywords
- battery module
- welding
- connecting sheet
- conductive connecting
- busbar
- 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
- 238000003466 welding Methods 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000002131 composite material Substances 0.000 claims abstract description 5
- 239000007769 metal material Substances 0.000 claims abstract description 5
- 238000013461 design Methods 0.000 claims description 8
- 239000004033 plastic Substances 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 4
- 229920001342 Bakelite® Polymers 0.000 claims description 3
- 239000004637 bakelite Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 229910000679 solder Inorganic materials 0.000 abstract description 3
- 230000000007 visual effect Effects 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
- B29C65/16—Laser beams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/72—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by combined operations or combined techniques, e.g. welding and stitching
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
- B29C65/7802—Positioning the parts to be joined, e.g. aligning, indexing or centring
- B29C65/7805—Positioning the parts to be joined, e.g. aligning, indexing or centring the parts to be joined comprising positioning features
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
- B29C65/7841—Holding or clamping means for handling purposes
-
- 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
- H01M10/058—Construction or 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
-
- 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
Abstract
The invention discloses a power battery module busbar which is a conductive connecting sheet (7) made of a layered composite metal material, wherein a laser welding area (10) on the conductive connecting sheet (7) is provided with a small hole (9). The invention also discloses a welding method of the power battery module bus bar. Adopt above-mentioned technical scheme, make electrically conductive connection piece laser welding spot surround regional trompil, make the solder joint visual, welding quality is visual promptly, reduces trouble and hidden danger, and then improves battery module busbar and electric core utmost point post welding quality.
Description
Technical Field
The invention belongs to the technical field of hybrid electric vehicle power systems or pure electric vehicle power systems, and relates to a structure and a manufacturing method of a power battery. More particularly, the present invention relates to a power battery module bus bar.
Background
The importance of new energy automobiles in all countries in the world is paid to, so that the rechargeable battery has unprecedented development opportunity. The new energy automobile is powered by a power battery system, and the lithium ion battery becomes a main variety of the power battery due to the advantages of large energy density, good safety, long cycle life and the like.
The lithium ion power battery system generally comprises a battery PACK, a battery management system, a wire harness, a high-voltage distribution box, an auxiliary device and the like. The battery PACK generally comprises a battery module, a battery management system sampling system, a wire harness, an auxiliary device and the like. There are also battery systems with only one battery PACK. The battery module comprises a battery module structural member, a battery core, a conductive connecting sheet, a sampling line, a connector assembly and the like.
in the battery module, the series and parallel connection of the battery cores mainly has two modes,
one is to fix the bus bar to the cell holder by using a locking screw, such as the battery post connecting piece disclosed in patent application 201620973779.X, as shown in fig. 1. The technology has long working time, and the screw falls into the battery module to easily cause short circuit;
another way is to weld the battery post to the conductive tab. The conductive connecting sheet is welded by ultrasonic welding, resistance welding, laser welding and the like.
for the welding of conductive tabs, the reliability of the connection and the safety of the battery are of the greatest concern to the manufacturer.
in the prior art, the welded poles of the battery are arranged on a plane, and the welding spot areas of the conductive connecting sheets are also arranged on a plane, but due to the assembly process and the dimensional tolerance of the components, the pole welding surface of the battery core is not exactly on a plane, at some welding spots, the conductive connecting sheets and the battery pole welding surface are at a distance, and the distance between the conductive connecting sheets and the poles, which can be effectively welded by the laser welder, is limited.
In order to reduce the influence of the gap between the conductive connecting sheet and the cell post on the welding quality, there are some tools for pressing the conductive connecting sheet to the cell post in the prior art, for example, patent document 201710316090.9 discloses a device for pressing contact surfaces at different positions by means of spring contacts.
however, in the prior art, the compressed area is not a welding point, so that the tight contact between the conductive connecting sheet and the cell pole column during welding cannot be ensured, and the welding area and the quality are not visible. Therefore, in the prior art, a large amount of poor welding such as cold joint, false welding, oxidation and the like cannot be avoided, and quality and potential safety hazards are caused.
disclosure of Invention
The invention provides a power battery module busbar and aims to improve the welding quality of a battery module busbar and a battery core pole.
in order to achieve the purpose, the invention adopts the technical scheme that:
the power battery module bus bar is a conductive connecting sheet made of a layered composite metal material, and a laser welding area on the conductive connecting sheet is provided with small holes.
The small holes are arranged inside the area surrounded by the laser welding points and are close to the laser welding points.
The number of the small holes is two or more.
In order to achieve the same purpose as the technical scheme, the invention also provides the welding method of the power battery module busbar, which comprises the following steps:
The welding method comprises the following steps:
Step one, arranging six battery cores according to a design mode;
Placing two end plates at two ends of the battery core arrangement, and welding the side panel of the module with the end plates under set pressure;
thirdly, placing the top plastic support at the top end of the battery module according to the designed position;
Fourthly, placing the bus bars according to the designed positions;
using a tool, lightly hammering the conductive connecting sheet above each pole to be attached to the poles;
Compressing the periphery of the opening of the conductive connecting sheet by using a clamping tool to enable the busbar to be tightly attached to the pole;
step seven, according to the set process, using laser welding to firmly weld the conductive connecting sheet and the battery cell pole;
and then subsequent processing is performed.
and the tool in the fifth step is a bakelite block.
by adopting the technical scheme, the laser welding spot surrounding area of the conductive connecting sheet is provided with the hole, so that the welding spot is visualized, namely the welding quality is visualized, the faults and hidden dangers are reduced, and the welding quality of the busbar of the battery module and the pole of the battery core is improved.
Drawings
the contents of the drawings and the reference numbers in the drawings are briefly described as follows:
FIG. 1 is a schematic structural view of a screw connection conductive sheet according to the present invention;
FIG. 2 is a schematic diagram of the position relationship between the opening and the solder joint on the conductive sheet of the present invention;
FIG. 3 is a schematic diagram showing the positional relationship between a plurality of openings and solder joints on a conductive sheet according to the present invention;
FIG. 4 is a schematic diagram of the relative positions of the battery cells and the bus bars of the present invention;
FIG. 5 is a schematic view of a battery module according to the present invention;
FIG. 6 is a schematic top view of the present invention;
Fig. 7 is a schematic diagram of the relative positions of the battery cell, the bus bar and the top plastic bracket of the present invention.
Labeled as:
1. A battery core, 2, end plates, 3, module side panels, 4, a top plastic support, 5, a bus bar, 6, a pole, 7, a conductive connecting sheet, 8, a battery module, 9, a small hole, 10 and a laser welding spot,
Detailed Description
the following detailed description of the embodiments of the present invention will be given in order to provide those skilled in the art with a more complete, accurate and thorough understanding of the inventive concept and technical solutions of the present invention.
as shown in fig. 1 to 7, the structure of the present invention is a power battery module bus bar, which is a conductive connecting sheet 7 made of a laminated composite metal material.
In order to overcome the problems and defects of the prior art and achieve the purpose of improving the welding quality of a busbar and a battery cell pole of a battery module, the invention adopts the following technical scheme:
As shown in fig. 2 and fig. 3, in the power battery module busbar according to the present invention, the laser welding area 10 on the conductive connecting sheet 7 is provided with a small hole 9.
By adopting the technical scheme, the reject ratio of welding the busbar and the electric core pole in the power battery module is reduced.
as shown in fig. 2, the small hole 9 is arranged inside the area surrounded by the laser welding spot 10 and is adjacent to the laser welding spot 10.
as shown in fig. 3, the number of the small holes 9 is two or more.
the power battery module busbar is a conductive connecting sheet made of a layered composite metal material, and a laser welding area on the conductive connecting sheet is provided with small holes which are arranged inside an area surrounded by laser welding points and are close to the laser welding points.
as shown in fig. 2:
the shape of the opening includes, but is not limited to, round hole, square hole, hexagonal hole, triangular hole, and the number of the openings includes, but is not limited to, one, two, or more.
the invention can adopt 6 square hard-shell battery cell modules of 43 Ah3.6V.
In order to achieve the same purpose as the technical scheme, the invention also provides the welding method of the power battery module busbar, which comprises the following steps:
The welding method comprises the following steps:
step one, arranging six battery cores 1 according to a design mode; the design mode is shown in FIG. 4;
Placing two end plates 2 at two ends of the battery core arrangement, and welding the module side panel 3 and the end plates 2 under set pressure;
thirdly, placing the top plastic support 4 at the top end of the battery module 8 according to a designed position; the design position is shown in fig. 5;
Fourthly, placing the bus bar 5 according to a design position, wherein the design position is shown in figure 4;
using a tool to lightly hammer the conductive connecting sheet 7 above each pole 6 so as to be attached to the pole 6;
pressing the periphery of the opening of the conductive connecting sheet 7 by using a clamping tool to enable the busbar 5 to be tightly attached to the pole 6;
step seven, according to the set process, the conductive connecting sheet 7 and the battery cell pole 6 are firmly welded by laser welding;
And then subsequent processing is performed.
and the tool in the fifth step is a bakelite block.
the invention has been described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the specific implementation in the above-described manner, and it is within the scope of the invention to apply the inventive concept and solution to other applications without substantial modification.
Claims (5)
1. The utility model provides a power battery module busbar, is electrically conductive connection piece (7) of stratiform composite metal material which characterized in that: and a laser welding area (10) on the conductive connecting sheet (7) is provided with a small hole (9).
2. The power cell module busbar of claim 1, wherein: the small holes (9) are arranged inside the area surrounded by the laser welding points (10) and are close to the laser welding points (10).
3. The power cell module busbar of claim 1, wherein: the number of the small holes (9) is two or more.
4. The welding method of the power battery module busbar according to any one of claims 1 to 3, wherein: the welding method comprises the following steps:
Step one, arranging six battery cores (1) according to a design mode;
Placing two end plates (2) at two ends of the battery core arrangement, and welding the module side panel (3) and the end plates (2) under set pressure;
Thirdly, placing the top plastic support (4) at the top end of the battery module (8) according to a designed position;
fourthly, placing the bus bar (5) according to a design position;
using a tool to slightly hammer the conductive connecting sheet (7) above each pole post (6) so as to enable the conductive connecting sheet to be attached to the pole posts (6);
Pressing the periphery of the opening of the conductive connecting sheet (7) by using a clamping tool to enable the busbar (5) to be tightly attached to the pole (6);
Step seven, according to the set process, the conductive connecting sheet (7) and the battery cell pole (6) are firmly welded by laser welding;
and then subsequent processing is performed.
5. the method for welding the bus bar of the power battery module as set forth in claim 4, wherein: and the tool in the fifth step is a bakelite block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910890933.5A CN110571400A (en) | 2019-09-20 | 2019-09-20 | power battery module bus bar and welding method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910890933.5A CN110571400A (en) | 2019-09-20 | 2019-09-20 | power battery module bus bar and welding method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110571400A true CN110571400A (en) | 2019-12-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910890933.5A Pending CN110571400A (en) | 2019-09-20 | 2019-09-20 | power battery module bus bar and welding method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110571400A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111864173A (en) * | 2020-07-16 | 2020-10-30 | 深圳市拓湃新能源科技有限公司 | Battery pack welding process |
| CN115548589A (en) * | 2022-10-24 | 2022-12-30 | 楚能新能源股份有限公司 | Bus bar for battery module and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103560263A (en) * | 2013-11-08 | 2014-02-05 | 宁德时代新能源科技有限公司 | Assembling process of battery module |
| CN206194848U (en) * | 2016-10-19 | 2017-05-24 | 广东亿纬赛恩斯新能源系统有限公司 | Group battery connection piece welded structure |
| CN107204418A (en) * | 2017-07-17 | 2017-09-26 | 镇江科信动力系统设计研究有限公司 | A kind of aluminium wire welds bus-bar |
| CN208819972U (en) * | 2018-11-14 | 2019-05-03 | 江苏芯界新能源科技有限公司 | Lithium battery confluence sheet devices |
| CN211125802U (en) * | 2019-09-20 | 2020-07-28 | 江西优特汽车技术有限公司 | Power battery module busbar |
-
2019
- 2019-09-20 CN CN201910890933.5A patent/CN110571400A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103560263A (en) * | 2013-11-08 | 2014-02-05 | 宁德时代新能源科技有限公司 | Assembling process of battery module |
| CN206194848U (en) * | 2016-10-19 | 2017-05-24 | 广东亿纬赛恩斯新能源系统有限公司 | Group battery connection piece welded structure |
| CN107204418A (en) * | 2017-07-17 | 2017-09-26 | 镇江科信动力系统设计研究有限公司 | A kind of aluminium wire welds bus-bar |
| CN208819972U (en) * | 2018-11-14 | 2019-05-03 | 江苏芯界新能源科技有限公司 | Lithium battery confluence sheet devices |
| CN211125802U (en) * | 2019-09-20 | 2020-07-28 | 江西优特汽车技术有限公司 | Power battery module busbar |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111864173A (en) * | 2020-07-16 | 2020-10-30 | 深圳市拓湃新能源科技有限公司 | Battery pack welding process |
| CN115548589A (en) * | 2022-10-24 | 2022-12-30 | 楚能新能源股份有限公司 | Bus bar for battery module and preparation method thereof |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication | ||
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Application publication date: 20191213 |