CN104409768B - Lithium battery - Google Patents
Lithium battery Download PDFInfo
- Publication number
- CN104409768B CN104409768B CN201410692917.2A CN201410692917A CN104409768B CN 104409768 B CN104409768 B CN 104409768B CN 201410692917 A CN201410692917 A CN 201410692917A CN 104409768 B CN104409768 B CN 104409768B
- Authority
- CN
- China
- Prior art keywords
- battery core
- base portion
- linkage section
- housing
- bending segment
- 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.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
-
- 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
- H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (AREA)
Abstract
This application provides a kind of lithium battery, it possesses：Housing；Battery core, this battery core is arranged on the inside of described housing；Pole, is arranged on described housing and extends from housing；Lug, it includes the base portion extending from described battery core and the linkage section extending merging from described base portion and being formed；Described linkage section is directly electrically affixed with described pole bottom.By using above-mentioned lithium battery, the size in cell thickness direction can be reduced and can improve reliability.
Description
Technical field
The application is related to a kind of lithium battery.
Background technology
At present, have that energy density is high, power density is high due to lithium ion battery, recycle often, storage time
Long the advantages of, the portable electric appts such as mobile phone, DV and laptop computer are widely used, and
Widely should have in terms of the big-and-middle-sized electrical equipment such as the electric vehicles such as electric automobile, electric bicycle and energy storage facility
With prospect, become the key solving the global problem such as energy crisis and environmental pollution.
Increasingly perfect with electric vehicle engineering, electric automobile and hybrid electric vehicle are from daily life increasingly
Closely, there is huge business opportunity, electric automobile is higher to providing the performance of the lithium ion battery of energy to propose for it simultaneously
Require.Particularly hybrid-power battery, itself is very high to battery core dimensional requirement, particularly the thickness direction size of battery core,
If thickness direction size is larger, often it is difficult to the slimming of product.In addition, the work(for battery core high current charge-discharge
Rate requires equally higher.If because the area of passage within battery core is not enough, can produce big during high current charge-discharge
The heat of amount, just influences whether the performance of battery core, or even causes a series of side reaction, thus causing on fire, the safety such as blast
Problem.
For now widely used square structure duricrust battery, the company of the top cover pole of the lug of battery core and battery
The mode that connects all is realized by switching piece, and that is, the lug of battery core and switching piece pass through ultrasonic bonding or electric resistance welding or riveting etc.
Mode is coupled；Switching piece is assembled with pole by way of laser welding or riveting.Lug and pole due to battery core
This part of switching piece to be passed through between post, also needs, by ultrasonic bonding, laser welding twice assembling mode, to make battery core simultaneously
Internal resistance increase, excessively stream and the heat production of battery core will be had influence on.Switching piece can take certain sky in the assembling of inside battery simultaneously
Between, the space of particularly thickness direction and short transverse.Thus, lead to cell thickness excessive and there is potential safety hazard.
Content of the invention
The purpose of the application is to provide a kind of thickness little and safety preferably lithium battery.
To achieve these goals, the lithium battery of the first scheme according to the application, possesses：Housing；Battery core, this battery core sets
Put the inside in described housing；Pole, is arranged on described housing and extends from housing；Lug, it is included from described battery core
The base portion extending and the linkage section extending merging from described base portion and being formed；Described linkage section is straight with described pole bottom
Connect electrically affixed.
Preferably, described lug also includes being formed between described base portion and described linkage section from the extension merging of described base portion
Bending segment.
Preferably, the angle between described bending segment and described linkage section is right angle or acute angle.
Preferably, the length of described bending segment is more than or equal to described battery core to the distance of described pole bottom surface.
Preferably, described linkage section extends convergence from the side of described battery core and forms.
Preferably, described linkage section extends convergence from the stage casing of described battery core and forms.
The lithium battery of the alternative plan according to the application, possesses：Housing；First battery core and the second battery core, described first electricity
Core and described second battery core are arranged on the inside of described housing；Pole, is arranged on described housing and extends from housing；First
Lug, it includes the first base portion directly extending from described first battery core and extending from described first base portion and merges and shape
The first linkage section becoming；Second lug, it includes the second base portion directly extending from described second battery core and from described
Second base portion extends the second linkage section merging and being formed；Described first battery core and described second battery core with described first base portion with
The relative mode of described second base portion is opposite disposed, described first linkage section and described second linkage section superposedly with described
Pole bottom is directly electrically affixed.
The lithium battery of the third program according to the application, possesses：Housing；First battery core and the second battery core, described first electricity
Core and described second battery core are arranged on the inside of described housing；Pole, is arranged on described housing and extends from housing；First
Lug, the first base portion that it includes directly extending from described first battery core, extends from described first base portion and merges and formed
The first bending segment and from described first bending segment extend formed the first linkage section；Second lug, it is included from described
The second base portion that two battery cores are directly extended, extend from described second base portion and merge and the second bending segment of being formed and from institute
State the second bending segment and extend the second linkage section being formed；Described first battery core and described second battery core are with described first base portion and institute
The mode stating the second base portion towards described pole is arranged side by side, and described first linkage section and described second linkage section are superposedly
Directly electrically affixed with described pole bottom.
By using the lithium battery according to such scheme, by increasing capacitance it is possible to increase the area of passage of battery core, reduce in large current density
The heat that can produce in the process of electricity, reduces the impact of the performance to battery core such that it is able to improve battery reliability.In addition, by
In the size in thickness direction can be reduced, thus being advantageously implemented miniaturization and the slimming of product, improve space availability ratio.
Brief description
Fig. 1 is the cross section structure diagram of the lithium battery of the application.
Fig. 2 is the battery core of the lithium battery interior of the application and the structural representation of lug.
Fig. 3 is the battery core of the lithium battery interior of the application and another structural representation of lug.
Fig. 4 be the lithium battery interior of the application lug trim after structural representation.
Fig. 5 is the cross section structure diagram of the lithium battery of the second embodiment of the application.
Fig. 6 is the cross section structure diagram of the lithium battery of the 3rd embodiment of the application.
Specific embodiment
Hereinafter, by combining accompanying drawing, the specific embodiment of the application is described in detail.
As shown in figure 1, the lithium ion battery 1 of the application possesses substantially rectangular shape housing 10, is arranged on inside this housing 10
Battery core 14 (such as JR (the rich battery core of volume)), be embedded the pole 12 on housing 10 top and be arranged on pole 12 and battery core 14 it
Between lug 16.
Specifically, one end of pole 12 stretches into that housing 10 is internal and other end is stretched out outside housing 10.Lug 16 wraps
Include the base portion 160 directly extending from battery core 14, extend from described base portion and merge and the linkage section 164 that formed and from described
Base portion 160 substantially middle section position extends merging and is formed at the bending segment 162 between described base portion 160 and described linkage section 164.Institute
State linkage section 164 and bending segment 162 by cathode tab or anode lug are for example forced together by merging and by ultrasonic
Wave soldering connects compacting and is formed.
Linkage section 164 is directly electrically affixed with the bottom of pole 12, for example, achieved a fixed connection by laser welding.Due to
By the way of directly affixed, conveyance capacity can be improved, improve the security reliability of lithium battery.
Refer to Fig. 1 and Fig. 6, the angle between the bending segment 162 of lug 16 and linkage section 164 can be right angle or sharp
Angle.In order to improve the connection reliability between lug 16 and pole 12, suppression especially during assembling or use produces and breaks
The probability split, preferably has the bending size of 0.3～3mm in the short transverse of battery core 14 in lug 16, fully realizes buffering
Effect.
Hereinafter, with reference to Fig. 2 and Fig. 5, the second embodiment of the application is described.In order to avoid repeat, only just with
Upper difference is described in detail.Lithium electronics 1 ' the inclusion pole 12 ' of the second embodiment of the application, first being oppositely arranged
Battery core 14 ' a and the second battery core 14 ' b and extend, from this first battery core 14 ' a and the second battery core 14 ' b, the merging respectively
One lug 16 ' a and the second lug 16 ' b.Described first lug 16 ' a possesses the first base portion 160 ' a and the first linkage section 161 ' a,
Described second lug 16 ' b includes the second base portion 160 ' b and the second linkage section 161 ' b.Described first base portion 160 ' a and described the
Two base portion 160 ' b is oppositely arranged, the first linkage section 161 ' a and described second linkage section 161 ' b overlapped and with described pole
12 ' bottoms are directly electrically connected with.Thereby, it is possible to improving the assembly space of battery and improving the reliability of battery.In addition, because with front
State that content is roughly the same, generation type and position for above-mentioned component do not repeat.
As shown in fig. 6, in the 3rd embodiment of the application, lithium battery 1 " includes pole 12 ", the 3rd electricity that is arranged side by side
Core 14 " a and the 4th battery core 14 " b, respectively from the 3rd battery core 14 " a and the 4th battery core 14 " b extends the 3rd pole merging and being formed
Ear 16 " a and the 4th lug 16 " b.3rd lug 16 " a includes the 3rd base portion 160 " a and the 3rd base portion 160 " a is vertical is connected
The 3rd kink 162 " a and with the 3rd bending segment 162 " a the 3rd linkage section 161 connected vertically " a.4th lug
16 " b possesses the 4th base portion 160 " b, the 4th linkage section 161 " b and the 4th bending segment 162 " b, because of its concrete structure and the 3rd lug
16 " a is same, will not be described here.Described 3rd linkage section 161 " a and the 4th linkage section 161 " b overlapped and with described pole
Post 12 " bottom is directly electrically connected with.Thereby, it is possible to improving the assembly space of battery and improving the reliability of battery.
Hereinafter, generation type of the lithium battery to the application etc. is described in detail.
As shown in figure 3, can various sizes of dislocation successively by outermost to nexine after combining in lug 16, electricity
The thickness of core 14 is bigger, and the dislocation after lug 16 merges compression is more serious, therefore, if the thickness of battery core 14 is less, with
On dislocation also little.
As shown in figure 3, it is assumed that the thickness of battery core 14 is T in lug 16 compression fit scheme placed in the middle, then lug 16 is in height
Dislocation on degree direction is worth for T/2, usually when the dislocation value of lug 16 is more than 3～5mm, i.e. T>During 6～10mm, should be first by lug
16 are trimmed and are welded with pole 12.Its reason is, if not trimming lug 16 but directly entering lug 16 with pole 12
Row is welded to connect, and failure welding (such as burn-through, rosin joint etc.) or bonding area can be led to not enough due to the uneven thickness of lug 16,
Lead to battery core 14 temperature rise in course of normal operation too high, the performance of impact battery core even brings potential safety hazard.
By using the lithium battery according to such scheme, by increasing capacitance it is possible to increase the area of passage within battery core, reduce in high current
The heat that can produce during discharge and recharge, reduces the impact of the performance to battery core such that it is able to improve battery reliability.Separately
Outward, due to the size in thickness direction can be reduced, thus being advantageously implemented miniaturization and the slimming of product, improve space profit
With rate.
It will be appreciated by persons skilled in the art that the above is the illustration for the present invention, the present invention is not limited to
This.All any changes made within the essential scope of the present invention and replacement, broadly fall into protection scope of the present invention.
Claims (4)
1. a kind of lithium battery is it is characterised in that possess：
Housing；
Battery core, this battery core is arranged on the inside of described housing；
Pole, is arranged on described housing and extends from housing；
Lug, it includes the base portion extending from described battery core and the linkage section extending merging from described base portion and being formed；
Described linkage section is directly electrically affixed with described pole bottom；
Described lug also includes merging, from the extension of described base portion, the bending segment being formed between described base portion and described linkage section；
Angle between described bending segment and described linkage section is acute angle；
The length of described bending segment is more than described battery core to the distance of described pole bottom surface.
2. lithium battery as claimed in claim 1 is it is characterised in that described linkage section is from the extension convergence of the side of described battery core
Become.
3. lithium battery as claimed in claim 1 is it is characterised in that described linkage section is from the extension convergence of the stage casing of described battery core
Become.
4. a kind of lithium battery, possesses：
Housing；
First battery core and the second battery core, described first battery core and described second battery core are arranged on the inside of described housing；
Pole, is arranged on described housing and extends from housing；First lug, it includes directly extending from described first battery core
And the first base portion going out, extend from described first base portion and merge and the first bending segment of being formed and prolong from described first bending segment
Stretch the first linkage section of formation；
Second lug, the second base portion that it includes directly extending from described second battery core, extends from described second base portion and closes
And and the second bending segment being formed and the second linkage section extending formation from described second bending segment；
Described first battery core and described second battery core are by described first base portion and described second base portion towards in the way of described pole
It is arranged side by side, described first linkage section and described second linkage section are superposedly directly electrically affixed with described pole bottom；
Angle between described first bending segment and described first linkage section is acute angle；Described second bending segment is with described second even
Connecing the angle between section is acute angle；
The length of described first bending segment is more than described first battery core to the distance of described pole bottom surface；Described second bending segment
Length is more than described second battery core to the distance of described pole bottom surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410692917.2A CN104409768B (en) | 2014-11-25 | 2014-11-25 | Lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410692917.2A CN104409768B (en) | 2014-11-25 | 2014-11-25 | Lithium battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104409768A CN104409768A (en) | 2015-03-11 |
| CN104409768B true CN104409768B (en) | 2017-03-08 |
Family
ID=52647376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410692917.2A Active CN104409768B (en) | 2014-11-25 | 2014-11-25 | Lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104409768B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111755657B (en) | 2019-03-29 | 2022-02-15 | 宁德新能源科技有限公司 | Electrode assembly |
| CN113871807A (en) * | 2020-06-30 | 2021-12-31 | 比亚迪股份有限公司 | Battery and battery pack |
| CN114204224B (en) * | 2020-08-31 | 2023-06-13 | 比亚迪股份有限公司 | Battery cell |
| CN113314810A (en) * | 2021-07-29 | 2021-08-27 | 东莞塔菲尔新能源科技有限公司 | Secondary battery, battery module and electric device |
| CN113708021B (en) * | 2021-08-02 | 2023-06-13 | 惠州锂威新能源科技有限公司 | Manufacturing method of multi-lug battery and multi-lug battery |
| CN217719895U (en) * | 2022-07-18 | 2022-11-01 | 宁德时代新能源科技股份有限公司 | Battery cell, battery and power consumption device |
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| CN201438192U (en) * | 2009-05-08 | 2010-04-14 | 深圳迈瑞生物医疗电子股份有限公司 | Sample frame |
| CN201490241U (en) * | 2009-06-30 | 2010-05-26 | 深圳市金和能电池科技有限公司 | Lithium cell cover plate assembly and lithium cell using same |
| CN201540909U (en) * | 2009-08-31 | 2010-08-04 | 深圳市金和能电池科技有限公司 | Lithium battery cover board assembly and lithium battery using the assembly |
| CN203103389U (en) * | 2013-03-11 | 2013-07-31 | 宁德新能源科技有限公司 | Anti-rotating mechanism of lithium ion battery pole |
| CN103579668A (en) * | 2013-11-22 | 2014-02-12 | 江苏风迅新能源科技有限公司 | High-voltage and high-energy density lithium ion battery and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4841076B2 (en) * | 2001-08-27 | 2011-12-21 | Ｎｅｃエナジーデバイス株式会社 | Sealed battery |
| CN201004475Y (en) * | 2006-12-07 | 2008-01-09 | 天津力神电池股份有限公司 | Column lithium ion battery with two bending cathode ear |
| JP5733252B2 (en) * | 2012-03-27 | 2015-06-10 | 株式会社豊田自動織機 | Connection method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201438192U (en) * | 2009-05-08 | 2010-04-14 | 深圳迈瑞生物医疗电子股份有限公司 | Sample frame |
| CN201490241U (en) * | 2009-06-30 | 2010-05-26 | 深圳市金和能电池科技有限公司 | Lithium cell cover plate assembly and lithium cell using same |
| CN201540909U (en) * | 2009-08-31 | 2010-08-04 | 深圳市金和能电池科技有限公司 | Lithium battery cover board assembly and lithium battery using the assembly |
| CN203103389U (en) * | 2013-03-11 | 2013-07-31 | 宁德新能源科技有限公司 | Anti-rotating mechanism of lithium ion battery pole |
| CN103579668A (en) * | 2013-11-22 | 2014-02-12 | 江苏风迅新能源科技有限公司 | High-voltage and high-energy density lithium ion battery and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104409768A (en) | 2015-03-11 |
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