CN202662698U - Cylindrical lithium ion battery - Google Patents
Cylindrical lithium ion battery Download PDFInfo
- Publication number
- CN202662698U CN202662698U CN2012201984875U CN201220198487U CN202662698U CN 202662698 U CN202662698 U CN 202662698U CN 2012201984875 U CN2012201984875 U CN 2012201984875U CN 201220198487 U CN201220198487 U CN 201220198487U CN 202662698 U CN202662698 U CN 202662698U
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- battery
- negative
- lithium ion
- lug
- plate
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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
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Abstract
The utility model belongs to the technical field of lithium ion batteries, and in particular relates to a cylindrical lithium ion battery. The cylindrical lithium ion battery comprises a battery shell, a battery cell received in the battery shell, electrolyte filled in the battery shell as well as caps in grouping connection on the battery shell in a seal mode; the central area of the battery cell is provided with a central tube; the battery cell is formed by a positive electrode plate, a negative electrode plate and a diaphragm by coiling; two ends of the negative plate are respectively provided with a main negative electrode lug and an auxiliary negative electrode lug formed by a blank current collector of the positive electrode plate; after the battery cell is coiled, the main negative electrode lug and the auxiliary negative electrode lug are connected by welding, and the main negative electrode lug and the bottom part of the battery shell are connected by welding. The cylindrical lithium ion battery provided by the utility model is compact in structure; because the thickness of the auxiliary negative electrode lug is thin, the internal structure of the battery cell can not be influenced; and not only is the inner resistance of the battery cell lowered, but also the uniformity of the current density in the battery cell is ensured, and the high-multiplying-power electricity charging and discharging performance of the battery is improved.
Description
Technical field
The utility model belongs to technical field of lithium ion, relates in particular to that a kind of manufacture craft is easy, compact conformation, little, the uniform column lithium ion battery of current density of internal resistance.
Background technology
Along with the development of modern society, the application of the electric tools such as electric bicycle, battery-operated motor cycle and electric automobile is more and more extensive.Column lithium ion battery is as a kind of environmental protection battery, the advantage such as have that energy density height, operating voltage are high, profile standard and shell are hard, and therefore the application in various electric tools is more and more extensive.
Electric tool has higher requirement to the lithium ion battery as its energy supply element, particularly require battery to possess high energy density and little internal resistance, the self-heating of battery when reducing large multiplying power discharging, also require simultaneously the inside battery current density even, to promote the consistency of inside battery charge-discharge performance.
In order to reach above requirement, some column lithium ion batteries adopt simply the negative lug number on the negative plate by a way that is increased to two.But the structure manufacturing process of this pair of negative lug is complicated, and cost is high; And too much lug insertion battery core, can cause inner more step, inner unbalance stress when battery core discharges and recharges of forming of battery core; The insertion of crossing simultaneously multi pole ears also can have a strong impact on the raising of battery core energy density; On the other hand, the stack of the thickness of two lugs can cause negative lug to follow the welding between box hat to be difficult to control, is prone to weldering or rosin joint.
In view of this, necessaryly provide that a kind of manufacture craft is easy, compact conformation, little, the uniform column lithium ion battery of current density of internal resistance.
The utility model content
The purpose of this utility model is: for the deficiencies in the prior art, and provide that a kind of manufacture craft is easy, compact conformation, little, the uniform column lithium ion battery of current density of internal resistance, to overcome inside battery unbalance stress in the prior art, internal resistance is large, current density is inhomogeneous deficiency.
In order to achieve the above object, the utility model adopts following technical scheme:
A kind of column lithium ion battery, comprise battery container, be contained in the battery core in the described battery container, be filled in the electrolyte in the described battery container, and seal group is connected to the battery cap on the described battery container, the central area of described battery core is provided with central space, described central space is provided with central tube, described battery core is by positive plate, negative plate and be arranged at described positive plate and described negative plate between membrane winding form, described negative plate comprises negative current collector and the negative electrode active material layer that is coated on the described negative current collector, described positive plate is provided with positive pole ear, described positive pole ear and the welding of described block, the secondary negative lug that the two ends of described negative plate are respectively equipped with main negative lug and are comprised of the blank collector of negative plate self, after being wound into battery core, described main negative lug and described secondary negative lug welding, the bottom welding of described main negative lug and described battery container.
As a kind of improvement of the utility model column lithium ion battery, described secondary negative lug folds the collector band of coming for the blank collector by negative plate self.
As a kind of improvement of the utility model column lithium ion battery, be wound into battery core after, described main negative lug is positioned at the outermost of described battery core, described secondary negative lug is positioned at the most inboard of described battery core.This pair negative lug and negative plate have a style of one's own, and need not extra welding; And secondary negative lug thin thickness, easily to reel, the adding of this secondary negative lug does not exert an influence to internal structure that can not battery core, and inside battery is stressed evenly in the time of can guaranteeing to discharge and recharge.
As a kind of improvement of the utility model column lithium ion battery, described main negative lug and secondary negative lug are arranged at respectively the blank afflux of the negative pole tagma at described negative plate two ends.
As a kind of improvement of the utility model column lithium ion battery, described main negative lug is copper strips or the nickel strap that is welded on negative plate one end.
As a kind of improvement of the utility model column lithium ion battery, described positive pole ear and the welding of described positive plate.
With respect to prior art, the utility model has utilized the collector of battery core negative plate dexterously, forms secondary negative lug, and this pair negative lug and negative plate have a style of one's own, and need not extra welding, and technique is simple, and the compact conformation of battery; Because secondary negative lug thin thickness is easily reeled, the adding of this pair negative lug can not exert an influence to the internal structure of battery core on the other hand; In addition, owing to only have main negative lug to weld with battery container, easy and simple to handle, guaranteed the reliability of welding; The mode that this negative plate two ends are provided with respectively a lug and are connected as a single entity, not only greatly reduce the internal resistance of battery core, and guaranteed the uniformity of battery core internal current density, and chemical system is more steady consistent, has improved widely the high rate charge-discharge performance of battery.
Description of drawings
Below in conjunction with the drawings and specific embodiments, the utility model and useful technique effect thereof are described in detail, wherein:
Fig. 1 is cutaway view of the present utility model;
Fig. 2 is the structural representation of the negative plate before the soldering polar ear in the utility model;
Fig. 3 is the structural representation of the negative plate behind the soldering polar ear in the utility model;
Fig. 4 is the structural representation of battery core in the utility model.
Embodiment
Below in conjunction with embodiment and Figure of description, the utility model is described in further detail, but execution mode of the present utility model is not limited to this.
As shown in Figure 1, a kind of column lithium ion battery that the utility model provides, comprise battery container 11, be contained in the battery core 7 in the battery container 11, be filled in the electrolyte in the battery container 11, and seal group is connected to the battery cap 8 on the battery container 11, the central area of battery core 7 is provided with central space, central space is provided with central tube 9, battery core 7 is by positive plate 4, negative plate 1 and be arranged at positive plate 4 and negative plate 1 between barrier film 12 reel and form, negative plate 1 comprises negative current collector 2 and the negative electrode active material layer 3 that is coated on the negative current collector 2, positive plate 4 is provided with positive pole ear 10, positive pole ear 10 and block 8 welding, the secondary negative lug 6 (as shown in Figure 3) that the two ends of negative plate 1 are respectively equipped with main negative lug 5 and are comprised of the blank collector of negative plate 1 self, after being wound into battery core 7, main negative lug 5 and secondary negative lug 6 welding, the bottom welding of main negative lug 5 and battery container 11.
Wherein, secondary negative lug 6 is for by the folding collector band that comes of the blank collector of negative plate 1 self.During practical operation, as shown in Figure 2, the blank collector of inner ring is sheared according to the dotted line among Fig. 2, then folding, stretch out the diaphragm Width, form a secondary negative lug 6.Owing to secondary negative lug 6 for by the blank Copper Foil of negative plate 1 self through shearing and the folding blank copper strips that forms, this pair negative lug 6 and negative plate 1 have a style of one's own, and need not extra welding; And secondary negative lug 6 thin thickness, easily to reel, the adding of this secondary negative lug 6 can not exert an influence to the internal structure of battery core 7, and inside battery is stressed evenly in the time of can guaranteeing to discharge and recharge.
As shown in Figure 4, be wound into battery core 7 after, main negative lug 5 is positioned at the outermost of battery core 7, secondary negative lug 6 is positioned at the most inboard of battery core 7, this structure can improve the energy density of battery to greatest extent.
Main negative lug 5 and secondary negative lug 6 are arranged at respectively the blank afflux of the negative pole tagma at negative plate 1 two ends, and blank afflux tagma is beneficial to the welding of lug, and can not lose active material.
Main negative lug 5 is for being welded on copper strips or the nickel strap of negative plate 1 one ends, and copper strips and nickel strap have conductivity preferably, less internal resistance and better weldability, are suitable as lug and use.During practical operation, copper strips or nickel strap form main negative lug 5 by the blank collector welding of the negative plate 1 of ultrasonic wave and outer ring;
During practical operation, with the blank Copper Foil welding by the negative plate 1 of ultrasonic wave and outer ring of copper strips or nickel strap, form main negative lug 5 first; Simultaneously the Copper Foil of inner ring is sheared according to the dotted line among Fig. 2, then folding, stretch out the diaphragm Width, form a secondary negative lug 6; Subsequently negative plate 1, positive plate 4 and barrier film 12 are superposeed, reel, after coiling is finished, main negative lug 5 is positioned at the outermost of battery core 7, secondary negative lug 6 is positioned at the most inboard of battery core 7, then with main negative lug 5 and in advance welding of secondary negative lug 6, subsequently main negative lug 5 is connected by electric resistance welding with the bottom of battery container 11.
The utility model uses a common lug as main negative lug 5, and the ingenious blank collector base material of battery core 7 inner rings that utilizes is as secondary negative lug 6, form two negative lug of major-minor, convenient welding, production technology is easy, and its production cost is equal to the battery core 7 of single negative lug, and on its structure, more be better than the expensive Double-pole lug effect that complicated technology is produced, battery core 7 compact conformations, current density is balanced, and internal resistance is little.In battery core 7 use procedures, the internal system high conformity, battery core 7 self-heatings are little, and particularly when high rate charge-discharge, the Heterosis of battery is more obvious.
Need to prove, the according to the above description announcement of book and elaboration, the utility model those skilled in the art can also change and revise above-mentioned execution mode.Therefore, the embodiment that discloses and describe above the utility model is not limited to also should be in the protection range of claim of the present utility model to equivalent modifications more of the present utility model and change.In addition, although used some specific terms in this specification, these terms do not consist of any restriction to the utility model just for convenience of description.
Claims (5)
1. column lithium ion battery, comprise battery container, be contained in the battery core in the described battery container, be filled in the electrolyte in the described battery container, and seal group is connected to the battery cap on the described battery container, the central area of described battery core is provided with central space, described central space is provided with central tube, described battery core is by positive plate, negative plate and be arranged at described positive plate and described negative plate between membrane winding form, described negative plate comprises negative current collector and the negative electrode active material layer that is coated on the described negative current collector, described positive plate is provided with positive pole ear, described positive pole ear and the welding of described block, it is characterized in that: the secondary negative lug that the two ends of described negative plate are respectively equipped with main negative lug and are comprised of the blank collector of negative plate self, after being wound into battery core, described main negative lug and described secondary negative lug welding, the bottom welding of described main negative lug and described battery container.
2. column lithium ion battery according to claim 1 is characterized in that: described secondary negative lug is for by the folding collector band that comes of the blank collector of negative plate self.
3. column lithium ion battery according to claim 1, it is characterized in that: after being wound into battery core, described main negative lug is positioned at the outermost of described battery core, and described secondary negative lug is positioned at the most inboard of described battery core.
3, column lithium ion battery according to claim 1 is characterized in that: described main negative lug and described secondary negative lug are arranged at respectively the blank afflux of the negative pole tagma at described negative plate two ends.
4. column lithium ion battery according to claim 1, it is characterized in that: described main negative lug is copper strips or the nickel strap that is welded in described negative plate one end.
5. column lithium ion battery according to claim 1 is characterized in that: described positive pole ear and the welding of described positive plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201984875U CN202662698U (en) | 2012-05-07 | 2012-05-07 | Cylindrical lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201984875U CN202662698U (en) | 2012-05-07 | 2012-05-07 | Cylindrical lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202662698U true CN202662698U (en) | 2013-01-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201984875U Expired - Lifetime CN202662698U (en) | 2012-05-07 | 2012-05-07 | Cylindrical lithium ion battery |
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| Country | Link |
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| CN (1) | CN202662698U (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104934563A (en) * | 2015-05-19 | 2015-09-23 | 山东驰翔新能源科技有限公司 | Cylindrical lithium battery |
| CN105470453A (en) * | 2015-12-31 | 2016-04-06 | 段志超 | Cylindrical lithium ion battery with low internal resistance |
| CN106129320A (en) * | 2016-06-27 | 2016-11-16 | 包头市金霸科技有限公司 | Battery cathode many solder joints flow collection sheet diffusion welding method |
| CN107591555A (en) * | 2016-07-06 | 2018-01-16 | 宁德时代新能源科技股份有限公司 | Secondary battery |
| CN107732318A (en) * | 2017-07-05 | 2018-02-23 | 东莞市创明电池技术有限公司 | Safety lithium ion cell core and lithium ion battery |
| CN111106302A (en) * | 2019-11-25 | 2020-05-05 | 深圳市卓能新能源股份有限公司 | Cylindrical lithium ion battery and preparation method thereof |
| CN111370637A (en) * | 2020-05-11 | 2020-07-03 | 福建南平延平区南孚新能源科技有限公司 | Production method of button battery without welding trace and button battery manufactured by same |
| CN111370638A (en) * | 2020-05-11 | 2020-07-03 | 福建南平延平区南孚新能源科技有限公司 | Production method of button battery without welding trace and button battery manufactured by same |
| CN114628772A (en) * | 2020-12-10 | 2022-06-14 | 北京好风光储能技术有限公司 | Winding type battery |
| CN115413384A (en) * | 2020-05-29 | 2022-11-29 | 宁德新能源科技有限公司 | Battery and electric device with same |
| WO2023178483A1 (en) * | 2022-03-21 | 2023-09-28 | 宁德时代新能源科技股份有限公司 | Battery cell, manufacturing method and manufacturing equipment therefor, battery, and power consuming apparatus |
-
2012
- 2012-05-07 CN CN2012201984875U patent/CN202662698U/en not_active Expired - Lifetime
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104934563A (en) * | 2015-05-19 | 2015-09-23 | 山东驰翔新能源科技有限公司 | Cylindrical lithium battery |
| CN105470453A (en) * | 2015-12-31 | 2016-04-06 | 段志超 | Cylindrical lithium ion battery with low internal resistance |
| CN106129320A (en) * | 2016-06-27 | 2016-11-16 | 包头市金霸科技有限公司 | Battery cathode many solder joints flow collection sheet diffusion welding method |
| CN106129320B (en) * | 2016-06-27 | 2018-05-25 | 包头市金霸科技有限公司 | The more solder joint flow collection sheet diffusion welding methods of battery cathode |
| CN107591555A (en) * | 2016-07-06 | 2018-01-16 | 宁德时代新能源科技股份有限公司 | Secondary battery |
| CN107591555B (en) * | 2016-07-06 | 2024-03-19 | 宁德时代新能源科技股份有限公司 | Secondary battery |
| CN107732318A (en) * | 2017-07-05 | 2018-02-23 | 东莞市创明电池技术有限公司 | Safety lithium ion cell core and lithium ion battery |
| CN111106302A (en) * | 2019-11-25 | 2020-05-05 | 深圳市卓能新能源股份有限公司 | Cylindrical lithium ion battery and preparation method thereof |
| CN111370638A (en) * | 2020-05-11 | 2020-07-03 | 福建南平延平区南孚新能源科技有限公司 | Production method of button battery without welding trace and button battery manufactured by same |
| CN111370638B (en) * | 2020-05-11 | 2024-01-30 | 福建南平延平区南孚新能源科技有限公司 | Production method of button cell without welding trace and prepared button cell |
| CN111370637B (en) * | 2020-05-11 | 2024-01-30 | 福建南平延平区南孚新能源科技有限公司 | Production method of button cell without welding trace and prepared button cell |
| CN111370637A (en) * | 2020-05-11 | 2020-07-03 | 福建南平延平区南孚新能源科技有限公司 | Production method of button battery without welding trace and button battery manufactured by same |
| CN115413384A (en) * | 2020-05-29 | 2022-11-29 | 宁德新能源科技有限公司 | Battery and electric device with same |
| CN114628772A (en) * | 2020-12-10 | 2022-06-14 | 北京好风光储能技术有限公司 | Winding type battery |
| CN114628772B (en) * | 2020-12-10 | 2023-07-07 | 北京好风光储能技术有限公司 | Winding type battery |
| WO2023178483A1 (en) * | 2022-03-21 | 2023-09-28 | 宁德时代新能源科技股份有限公司 | Battery cell, manufacturing method and manufacturing equipment therefor, battery, and power consuming apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130109 |