CN103178292B - Lithium ion battery and assembly method thereof - Google Patents
Lithium ion battery and assembly method thereof Download PDFInfo
- Publication number
- CN103178292B CN103178292B CN201310046692.9A CN201310046692A CN103178292B CN 103178292 B CN103178292 B CN 103178292B CN 201310046692 A CN201310046692 A CN 201310046692A CN 103178292 B CN103178292 B CN 103178292B
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- Prior art keywords
- conductive bar
- negative
- positive
- electrically connected
- lithium ion
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (AREA)
Abstract
The invention provides a lithium ion battery and an assembly method of the lithium ion battery. The lithium ion battery comprises a cell, a cover plate with a positive column and a negative column, a shell, a positive conductive strip and a negative conductive strip, wherein the cell comprises two cell packages which are respectively provided with a positive tab and a negative tab; the positive conductive strip is electrically connected with the positive column; two ends of the positive conductive strip are electrically connected with the corresponding positive tabs respectively; the negative conductive strip is electrically connected with the negative column; the two ends of the negative conductive strip are electrically connected with the corresponding negative tabs respectively; the two cell packages are attached to each other and positioned in the shell; and the cover plate covers the shell. According to the lithium ion battery provided by the invention, ineffective volume occupied by the welding and riveting of the positive and negative tabs and the positive and negative columns is greatly reduced, and the energy density of the battery is improved. The assembly method of the lithium ion battery provided by the invention is easy and convenient to operate, and production efficiency and the first pass yield and yield of products are greatly improved.
Description
Technical field
The present invention be more particularly directed to a kind of lithium ion battery and assembly method thereof.
Background technology
The advantages such as it is high that lithium ion battery has operating voltage, and specific energy is high, serviceability temperature wide ranges.Along with the extensive use in recent years in electric tool, specific energy and volumetric specific energy require upgrading further.
Rectangular lithium ion battery is formed primarily of housing, pole, battery core, electrolyte and cover plate now, and battery core is made up of positive and negative plate and middle barrier film, positive and negative lug, by positive and negative lug extracted current, is connected to by the mode of welding or riveting on the positive and negative pole on cover plate by positive and negative plate.There is the deficiency of following two aspects in existing connected mode: being connected together with cover plate by lug by welding manner needs artificially craft to locate, and wastes time and energy, and locates inaccurate, reduce the production efficiency of battery; By riveting method, lug is connected together with cover plate and will take enclosure interior larger space, reduce the effective area of active material, thus reduce the capacity of battery.
Summary of the invention
The technical problem to be solved in the present invention welds the defects such as the production efficiency capacity that is low, battery existed with the connected mode of riveted joint is little in order to what overcome the positive and negative lug of lithium ion battery and the positive and negative pole on cover plate in prior art, provides a kind of lithium ion battery and assembly method thereof.
The present invention solves above-mentioned technical problem by following technical proposals:
A kind of lithium ion battery, it comprises a battery core, one with the cover plate of a positive terminal and a negative terminal and a housing, its feature is, described lithium ion battery also comprises a positive conductive bar and a negative conductive bar, described battery core comprises the core bag that two have an anode ear and a negative electrode lug respectively, described positive conductive bar is electrically connected with described positive terminal, the two ends of described positive conductive bar are electrically connected with corresponding described anode ear respectively, described negative conductive bar is electrically connected with described negative terminal, the two ends of described negative conductive bar are electrically connected with corresponding described negative electrode lug respectively, described two core bags are bonded to each other and be positioned at described housing, housing described in described cover plate capping.
Preferably, described positive conductive bar and described negative conductive bar are " work " font, described positive conductive bar and described negative conductive bar include two bus transverse parts and a bus vertical part, the bus transverse part of described positive conductive bar is electrically connected with described anode ear, the middle part of the bus vertical part of described positive conductive bar is electrically connected with described positive terminal, the bus transverse part of described negative conductive bar is electrically connected with described negative electrode lug, and the middle part of the bus vertical part of described negative conductive bar is electrically connected with described negative terminal.This kind of electric connection mode is easily located; simple to operate; electrical connection efficiency can be improved; thus improve the first-pass yield of product; and avoid after pole directly welds with lug or rivet, what produce both during sealing tears stress, available protecting lug; reduce battery short circuit or the excessive risk of internal resistance, improve the first-pass yield of product.
Preferably, between the bus transverse part of described positive conductive bar and described anode ear be ultrasonic bonding.
Preferably, be resistance welded between the bus transverse part of described negative conductive bar and described negative electrode lug.
Preferably, being ultrasonic bonding between the middle part of the bus vertical part of described positive conductive bar and described positive terminal, is ultrasonic bonding between the middle part of the bus vertical part of described negative conductive bar and described negative terminal.
Preferably, the material of described positive conductive bar is aluminum or aluminum alloy, and the material of described negative conductive bar is copper or copper alloy.
Preferably, between described cover plate and described housing be ultrasonic bonding, Vibration welding or heat-sealing.
The present invention also provides a kind of assembly method for assembling above-mentioned lithium ion battery, and its feature is, it comprises the steps:
S
1: described positive conductive bar is electrically connected with described positive terminal, the two ends of described positive conductive bar are electrically connected with corresponding described anode ear respectively, described negative conductive bar is electrically connected with described negative terminal, the two ends of described negative conductive bar are electrically connected with corresponding described negative electrode lug respectively;
S
2: by described positive conductive bar and the bending of described negative conductive bar, described two core bags are fit together;
S
3: described two the core bags folded are inserted described housing, and described cover plate and described housing are sealed.
Preferably, in step S
1in, the two ends of described positive conductive bar are connected in the mode of ultrasonic bonding with described anode ear respectively, the two ends of described negative conductive bar are connected in the mode of resistance welded with described negative electrode lug respectively, the middle part of described positive conductive bar is connected in the mode of ultrasonic bonding with described positive terminal, the middle part of described negative conductive bar is connected in the mode of ultrasonic bonding with described negative terminal.
Preferably, in step S
3in, adopt ultrasonic bonding, Vibration welding or heat-sealing to seal described cover plate and described housing.
Positive progressive effect of the present invention is: lithium ion battery provided by the invention greatly reduces welding and the Iinvalid volume shared by riveted joint of positive and negative lug and positive and negative pole, promote battery energy density, the assembly method of lithium ion battery provided by the invention is simple, convenient, substantially increases production efficiency, the first-pass yield of product and qualification rate.
Accompanying drawing explanation
Fig. 1 is the axonometric drawing of the lithium ion battery of present pre-ferred embodiments.
Fig. 2 is the left view of the lithium ion battery of present pre-ferred embodiments.
Fig. 3 is the front view of the lithium ion battery of present pre-ferred embodiments.
Fig. 4 is the vertical view of lithium ion battery after completing electrical connection of present pre-ferred embodiments.
Embodiment
Lift preferred embodiment below, and come by reference to the accompanying drawings clearlyer intactly the present invention to be described.
As Figure 1-4, a kind of lithium ion battery, comprises a battery core, with the cover plate 3 of a positive terminal 1 and a negative terminal 2 and a housing 4.Battery core also comprises the core bag 7 that two have an anode ear 5 and a negative electrode lug 6 respectively, and core bag 7 combines with " Z " font lamination or winding method.
Lithium ion battery also comprises positive conductive bar 8 and a negative conductive bar 9.Positive conductive bar 8 and negative conductive bar 9 are " work " font (as can be seen from Figure 4), and correspondingly, positive conductive bar 8 and negative conductive bar 9 include two bus transverse parts and a bus vertical part.It is ultrasonic bonding between anode ear 5 on the bus transverse part of positive conductive bar 8 and two core bags 7.Be resistance welded between negative electrode lug 6 on the bus transverse part of negative conductive bar 9 and two core bags 7.Being ultrasonic bonding between the middle part of the bus vertical part of positive conductive bar 8 and positive terminal 1, is ultrasonic bonding between the middle part of the bus vertical part of negative conductive bar 9 and negative terminal 2.Certainly, it will be appreciated by those skilled in the art that connected mode just a kind of preferred scheme of ultrasonic bonding between above bus and pole, lug or resistance welded, also can adopt the electrical connection that other mode realizes between them.
Two the core bags 7 be connected on cover plate 3 by bus are bonded to each other and be positioned at housing 4, and cover plate 3 covers housing 4 by modes such as ultrasonic bonding, Vibration welding or heat-sealings.
The assembly method of assembling lithium ion battery comprises the following steps:
First, two bus transverse parts of positive conductive bar 8 are connected in the mode of ultrasonic bonding with the anode ear 5 on two core bags 7 respectively, two bus transverse parts of negative conductive bar 9 are connected in the mode of resistance welded with the negative electrode lug 6 on two core bags 7 respectively, the middle part of the bus vertical part of positive conductive bar 8 is connected in the mode of ultrasonic bonding with positive terminal 1, the middle part of the bus vertical part of negative conductive bar 9 is connected in the mode of ultrasonic bonding with negative terminal 2.Connect later lithium ion battery as shown in Figure 4.
Then, by positive conductive bar 8 and negative conductive bar 9 bending, two the core bags 7 being originally split in cover plate 3 both sides are fit together.This laminating type has used the thinking of originally being closed up by open book.In order to make two core bags 7 fit completely, bus can be bent into appearance as illustrated in fig. 1-3, certainly, is bent into other shapes and is also fine.
Finally, two core bags 7 of folding rear laminating are inserted housing 4, and seals cover plate 3 and housing 4, the mode of sealing can adopt ultrasonic bonding, Vibration welding or heat-sealing etc.
Although the foregoing describe the specific embodiment of the present invention, it will be understood by those of skill in the art that this only illustrates, protection scope of the present invention is defined by the appended claims.Those skilled in the art, under the prerequisite not deviating from principle of the present invention and essence, can make various changes or modifications to these execution modes, but these change and amendment all falls into protection scope of the present invention.
Claims (9)
1. a lithium ion battery, it comprises a battery core, one with the cover plate of a positive terminal and a negative terminal and a housing, it is characterized in that, described lithium ion battery also comprises a positive conductive bar and a negative conductive bar, described battery core comprises the core bag that two have an anode ear and a negative electrode lug respectively, described positive conductive bar is electrically connected with described positive terminal, the two ends of described positive conductive bar are electrically connected with corresponding described anode ear respectively, described negative conductive bar is electrically connected with described negative terminal, the two ends of described negative conductive bar are electrically connected with corresponding described negative electrode lug respectively, described two core bags are bonded to each other and be positioned at described housing, described positive conductive bar and described negative conductive bar are all bent to form
shape, housing described in described cover plate capping, described positive conductive bar and described negative conductive bar are " work " font, described positive conductive bar and described negative conductive bar include two bus transverse parts and a bus vertical part, the bus transverse part of described positive conductive bar is electrically connected with described anode ear, the middle part of the bus vertical part of described positive conductive bar is electrically connected with described positive terminal, the bus transverse part of described negative conductive bar is electrically connected with described negative electrode lug, and the middle part of the bus vertical part of described negative conductive bar is electrically connected with described negative terminal.
2. lithium ion battery as claimed in claim 1, is characterized in that, is ultrasonic bonding between the bus transverse part of described positive conductive bar and described anode ear.
3. lithium ion battery as claimed in claim 1, it is characterized in that, be resistance welded between the bus transverse part of described negative conductive bar and described negative electrode lug.
4. lithium ion battery as claimed in claim 1, it is characterized in that, being ultrasonic bonding between the middle part of the bus vertical part of described positive conductive bar and described positive terminal, is ultrasonic bonding between the middle part of the bus vertical part of described negative conductive bar and described negative terminal.
5. lithium ion battery as claimed in claim 1, it is characterized in that, the material of described positive conductive bar is aluminum or aluminum alloy, and the material of described negative conductive bar is copper or copper alloy.
6. lithium ion battery as claimed in claim 1, is characterized in that, is ultrasonic bonding, Vibration welding or heat-sealing between described cover plate and described housing.
7. for assembling the assembly method as the lithium ion battery in claim 1-6 as described in any one, it is characterized in that, it comprises the steps:
S
1: described positive conductive bar is electrically connected with described positive terminal, the two ends of described positive conductive bar are electrically connected with corresponding described anode ear respectively, described negative conductive bar is electrically connected with described negative terminal, the two ends of described negative conductive bar are electrically connected with corresponding described negative electrode lug respectively;
S
2: by described positive conductive bar and the bending of described negative conductive bar, described two core bags are fit together;
S
3: described two the core bags folded are inserted described housing, and described cover plate and described housing are sealed.
8. assembly method as claimed in claim 7, is characterized in that, in step S
1in, the two ends of described positive conductive bar are connected in the mode of ultrasonic bonding with described anode ear respectively, the two ends of described negative conductive bar are connected in the mode of resistance welded with described negative electrode lug respectively, the middle part of described positive conductive bar is connected in the mode of ultrasonic bonding with described positive terminal, the middle part of described negative conductive bar is connected in the mode of ultrasonic bonding with described negative terminal.
9. assembly method as claimed in claim 7, is characterized in that, in step S
3in, adopt ultrasonic bonding, Vibration welding or heat-sealing to seal described cover plate and described housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310046692.9A CN103178292B (en) | 2013-02-05 | 2013-02-05 | Lithium ion battery and assembly method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310046692.9A CN103178292B (en) | 2013-02-05 | 2013-02-05 | Lithium ion battery and assembly method thereof |
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| Publication Number | Publication Date |
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| CN103178292A CN103178292A (en) | 2013-06-26 |
| CN103178292B true CN103178292B (en) | 2015-05-20 |
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| CN201310046692.9A Expired - Fee Related CN103178292B (en) | 2013-02-05 | 2013-02-05 | Lithium ion battery and assembly method thereof |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108232095A (en) * | 2016-12-22 | 2018-06-29 | 天津中聚新能源科技有限公司 | The assembly method of the whole beam welding method of lug and lithium ion battery |
| CN107195957B (en) * | 2017-05-23 | 2024-05-28 | 深圳吉阳智能科技有限公司 | Lithium ion battery with anode and cathode arranged on same side and manufacturing method thereof |
| CN107959039B (en) * | 2017-10-09 | 2023-06-02 | 旷泰科技(上海)有限公司 | Integrated automation line of electricity core assembly |
| CN109687011B (en) * | 2018-12-25 | 2024-05-03 | 湖北亿纬动力有限公司 | Laminated lithium ion battery and manufacturing method thereof |
| CN110534813A (en) * | 2019-10-07 | 2019-12-03 | 南理工泰兴智能制造研究院有限公司 | A kind of power type plastic housing lithium battery hot-seal technique and its device |
| CN111463496B (en) * | 2020-04-15 | 2022-07-05 | 江西赣锋电池科技有限公司 | Laminated lithium battery and assembling method thereof |
| CN111653721B (en) * | 2020-06-16 | 2022-06-17 | 合肥国轩高科动力能源有限公司 | Battery roll core and battery |
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| US7432001B1 (en) * | 2003-12-09 | 2008-10-07 | Greatbatch Ltd. | Prevention of lithium deposition in nonaqueous electrolyte cells by electrolyte-to-cathode weight ratio |
| CN201956411U (en) * | 2011-03-17 | 2011-08-31 | 湖南丰源业翔晶科新能源股份有限公司 | Lug connection structure of laminated square lithium ion battery |
| CN102280602A (en) * | 2011-06-27 | 2011-12-14 | 东风汽车公司 | Power cell module arrangement connecting assembling structure |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2384215A1 (en) * | 2002-04-30 | 2003-10-30 | Richard Laliberte | Electrochemical bundle and method for making same |
| TWI416776B (en) * | 2010-08-24 | 2013-11-21 | Ind Tech Res Inst | Battery roll and central soaking member thereof |
-
2013
- 2013-02-05 CN CN201310046692.9A patent/CN103178292B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7432001B1 (en) * | 2003-12-09 | 2008-10-07 | Greatbatch Ltd. | Prevention of lithium deposition in nonaqueous electrolyte cells by electrolyte-to-cathode weight ratio |
| CN201956411U (en) * | 2011-03-17 | 2011-08-31 | 湖南丰源业翔晶科新能源股份有限公司 | Lug connection structure of laminated square lithium ion battery |
| CN102280602A (en) * | 2011-06-27 | 2011-12-14 | 东风汽车公司 | Power cell module arrangement connecting assembling structure |
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| CN103178292A (en) | 2013-06-26 |
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