CN2899126Y - Cylindrical lithium-ion battery - Google Patents
Cylindrical lithium-ion battery Download PDFInfo
- Publication number
- CN2899126Y CN2899126Y CNU2005201450350U CN200520145035U CN2899126Y CN 2899126 Y CN2899126 Y CN 2899126Y CN U2005201450350 U CNU2005201450350 U CN U2005201450350U CN 200520145035 U CN200520145035 U CN 200520145035U CN 2899126 Y CN2899126 Y CN 2899126Y
- Authority
- CN
- China
- Prior art keywords
- conductive plate
- battery
- electric conductor
- ptc
- ion battery
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- 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
- Connection Of Batteries Or Terminals (AREA)
Abstract
A cylindrical lithium-ion battery comprises an electrode casing, and an insulating layer, a PTC basal body, an electric conductor and a conductive plate inside the electrode casing, wherein, the conductive plate is disposed outside of the electrode casing; the insulating layer is arranged between the rim of the electrode casing and the rim of conductive plate; the PTC basal body is positioned in the space enclosed by the electrode casing, the insulating layer and conductive plate; both faces of the PTC basal body are respectively connected fixedly with the electric conductor; the electric conductor is respectively connected fixedly with the outside of the electrode casing and the conductive plate. When using the lithium-ion battery provided by the utility model, the PTC basal body is more sensitive to environment temperature due to being placed outside of the battery and is free from the impact of mechanical pressure for the electric conductor being respectively connected fixedly with the outside of the electrode casing and the conductive plate during battery assembling, thereby having enough heat expansion space and better protective effect to improve battery safety.
Description
Technical field
The utility model relates to a kind of lithium ion battery, more particularly relates to a kind of cylindrical lithium ion battery with overcurrent protection structure.
Background technology
Present employed overcurrent protective device generally has resistor, fuse, switch and PTC plate etc.Wherein, with regard to lithium ion battery, most of use is the PTC matrix in the lithium ion battery of each manufacturer production.PTC matrix (Positive Temperature Coefficient semistor) is widely used on movable electrical appliances, mobile phone, computer and other the communications facility as a kind of technology of overcurrent protection and overtemperature protection.
At present each producer uses ring-shaped P TC matrix at the cylindrical lithium ion battery of manufacturing more, in the process of sealing block, PTC matrix and cover plate is stacked, encase the edge by ring-shaped plastics or metal film after, defeat and be in the same place with machinery.Like this, when the machinery envelope was pressed, the PTC matrix can be extruded, and has distortion to a certain degree.In addition, under overheated situation, this combining structure can limit the expansion space of PTC matrix, therefore can cause the overcurrent protection decreased performance and the instability of PTC matrix.Simultaneously, at present in the employed this structure, because the PTC matrix is in the inside of battery, thus responsive inadequately to the induction of ambient temperature, so the overheat protective function of battery also is restricted.
The utility model content
The purpose of this utility model is insensitive and be squeezed, be out of shape in the process that the machinery envelope is pressed to ambient temperature induction at the PTC matrix in the block sub-assembly of cylindrical lithium ion battery in the prior art; thereby the expansion space is limited and influence the defective of overcurrent and overtemperature protection when causing being heated; provide that a kind of PTC of making matrix is not squeezed, the expansion space fully and responsive to the ambient temperature induction, thereby reach the good overcurrent and the cylindrical lithium ion battery of superheat protecting function.
The cylindrical lithium ion battery that the utility model provides comprises electrode shell, wherein, also comprise insulating barrier, PTC matrix, electric conductor and conductive plate, described conductive plate is positioned at the outside of electrode shell, described insulating barrier is between the edge of the edge of electrode shell and conductive plate, described PTC matrix is arranged in the space that electrode shell, insulating barrier and conductive plate impale, two faces of described PTC matrix are fixedly connected with electric conductor respectively, and described electric conductor is fixedlyed connected with conductive plate with the outside of electrode shell respectively.
Adopt cylindrical lithium ion battery of the present utility model, because the PTC matrix is placed on outside batteries, the PTC matrix is responsive more to the induction of ambient temperature.Simultaneously when battery has electric current to pass through; electric current passes through the outside of conductive plate, electric conductor, PTC matrix, another electric conductor and electrode shell successively; too high or environment temperature is too high when loading current; when the temperature of PTC matrix is higher than start-up temperature; polymer crystallite fusing in the PTC matrix becomes the state of indefinite form; cause the nonlinear rapid rising of internal resistance, thereby the restricted passage electric current plays a protective role.Because the PTC matrix in the cylindrical lithium ion battery of the present utility model has been placed on the outside of electrode shell; and two faces of PTC matrix are fixedly connected with electric conductor respectively; only be that electric conductor is fixedlyed connected with conductive plate with the outside of electrode shell respectively when battery is assembled; the PTC body portion is not subjected to the effect of mechanical pressure; the PTC matrix has enough expansion spaces, so the overcurrent of battery and overtemperature protection performance are better.
Description of drawings
Fig. 1 is the axial section of the external PTC matrix of electrode shell of the cylindrical lithium ion battery that provides of the utility model;
Fig. 2 is a ring-type PTC matrix schematic diagram;
Fig. 3 is the connection diagram of PTC matrix and electric conductor.
Embodiment
Be further described below in conjunction with accompanying drawing.
As shown in Figure 1, cylindrical lithium ion battery of the present utility model comprises electrode shell 1, wherein, also comprises insulating barrier 4, PTC matrix 2, electric conductor 3 and conductive plate 5; Described conductive plate 5 is positioned at the outside of electrode shell 1; Described insulating barrier 4 is between the edge of the edge of electrode shell 1 and conductive plate 5; Described PTC matrix 2 is arranged in the space that electrode shell 1, insulating barrier 4 and conductive plate 5 are impaled, and two faces of described PTC matrix 2 are fixedly connected with electric conductor 3 respectively; Described electric conductor 3 is fixedlyed connected with conductive plate 5 with the outside of electrode shell 1 respectively.
Wherein, described PTC matrix 2 can have any shape, and is preferably circle or annular, and such PTC matrix 2 surface areas are big, can reduce the thickness of PTC matrix 2.
In order to make the fixing more firm of PTC matrix 2, the number of the electric conductor 3 on described PTC matrix 2 two sides is preferably a plurality of.
Described electric conductor 3 is electrically connected with electrode shell 1 and conductive plate 5 respectively, and electric conductor 3 can be the electrical connection of any way with the mode that is electrically connected of electrode shell 1 and conductive plate 5, as bonding or welding, is preferably welding.
Described electric conductor 3 can be Any shape, as strip, bar-shaped, sheet.Be preferably tabs as shown in Figure 3, an end of described tabs is fixedlyed connected with electrode shell 1, and the other end is fixedlyed connected with the one side of PTC matrix 2.Because when assembling, electric conductor 3 elder generations and conductive plate 5 are fixed together, and in this case, the PTC matrix 2 that is fixedly connected with electric conductor 3 is positioned at the central authorities of conductive plate 5, and electric conductor 3 is more convenient for installing for tabs.
Described electric conductor 3 is any available electric conducting material, is preferably one or more of nickel, aluminium, steel.
Described electric conductor 3 can be any fixedly connected with fixedlying connected of PTC matrix 2, as bonding or welding, is preferably reflow soldering.
Described electrode shell 1 is preferably anode coat because the outer bottom area of anode coat is big, help PTC matrix 2 do thinner, install also more convenient.
Described electrode shell 1 is any available electric conducting material, is preferably steel.
Described insulating barrier 4 can be any insulating material for being preferably annulus, and for example plastics, rubber, fibre are preferably the plastics that have viscosity, so fixedly the position of conductive plate 5.
Described conductive plate 5 is preferably circle, and material is any available electric conducting material, is preferably steel.
Be further described below in conjunction with specific embodiment.
Comparative Examples 1
This Comparative Examples is used to illustrate existing column lithium ion battery.
To block a shot, PTC matrix, insulating barrier, cover plate directly be stacked together, with mechanical force it is pressed together to constitute the block sub-assembly.Wherein, the PTC matrix is the ring-type PTC matrix of KT15-2100CL for the model that Shanghai Coulter Corp produces, and as shown in Figure 2, insulating barrier is the annulus of plastics, blocks a shot to be circle, and cover plate also is circular.
Should block a shot then sub-assembly and positive pole, barrier film, negative pole, organic electrolyte, battery case, be assembled into cylindrical lithium ion battery, the battery that obtains is changed into 3.9V, be charged to 4.2V then, obtain model behind the partial volume that discharges again and be 18650 cylindrical lithium ion battery A.
Wherein, positive pole is made up of collector and the active material that is coated on the collector, described collector for length be 650 millimeters, wide be 56 millimeters aluminium foil, described active material is made up of LiCoO2 electrode active material, Kynoar (PVDF) binding agent, acetylene black conductive agent, and content of active substance is 15 grams on the positive pole.Negative pole is made up of collector and the active material that is coated on the collector, described collector for long 700 millimeters, wide be 58 millimeters Copper Foil, described active material is made up of graphite electrode active material, polytetrafluoroethylene (PTFE), CMC binding agent, and content of active substance is 7 grams on the negative pole.Barrier film is Celgard 2400 films.Organic electrolyte is that molar concentration is LiPF6/EC, the EMC of 1 mol, the mixed solution of DMC, and volume ratio is 1: 1: 1, and the organic electrolyte addition is 6 grams.The material of described battery case is the SPCC box hat of plating nickel on surface, and size is that diameter is that 18 millimeters, height are 66 millimeters.
Example 1
This example is used to illustrate column lithium ion battery of the present invention.
Method according to Comparative Examples 1 prepares battery, different is that described battery is not assembled the PTC matrix at positive pole block built-up section, used PTC matrix is connected to structure shown in Figure 1, described electric conductor 3 is two (each one on PTC matrix 2 two sides), one end of two electric conductors 3 is fixedlyed connected by reflow soldering with two faces of the PTC matrix 2 of ring-type respectively, the other end respectively with the outer bottom of circular negative pole box hat and the welding of circular steel current conducting plate, adhesive plastic annular insulating barrier obtains 18650 column lithium ion battery B between the edge of the outer bottom edge of negative pole box hat and steel current conducting plate.
Following example is used to illustrate the characteristics of column lithium ion battery of the present invention.
Example 2
1. cylindrical lithium ion battery A and B are charged to 3.85V respectively, and the spot welding nickel strap goes between on the both positive and negative polarity of battery, on the nickel strap lead-in wire, connect the internal resistance instrument simultaneously, ammeter, voltmeter and constant-current source, under normal temperature condition, it is charged then with constant-current source, output voltage is made as 15V, output current begins to increase from 2.0A, 2.0-4.0A between each increasing degree be 0.5A, 4.0A later on each increasing degree is 0.1A, charging is 1 minute under each electric current, observe the internal resistance of battery simultaneously, voltage, data such as electric current, if internal resistance does not have obvious rising then be adjusted to next electric current to charge when charging in a minute, sharply increase when observing the internal resistance of cell, when voltage data becomes 15V, electric current when record changes is provided with numerical value, is the starting current of PTC.Survey the starting current of the PTC matrix among cylindrical lithium ion battery A and the B respectively with the method.
2. battery is discharged into 3.0V respectively, and on the both positive and negative polarity of battery nickel strap lead-out wire of each point, on the nickel strap lead-out wire, connect the internal resistance instrument simultaneously, on battery steel shell, paste a temperature detecting head, then battery is placed on not in the baking box of heating, closes that the speed with 5 ℃/minute heats up behind the baking box, observe the internal resistance of battery simultaneously, when the internal resistance of cell sharply increases, write down the temperature of battery this moment, be the start-up temperature of PTC.With the method cylindrical lithium ion battery A and B are heated respectively, survey the start-up temperature of the PTC matrix among cylindrical lithium ion battery A and the B.The PTC matrix that table 1 shows among lithium ion battery A, the B be not assembled in the starting current in the battery and is being assembled in starting current in the battery and the variation of start-up temperature.
The PTC matrix that table 1 shows among lithium ion battery A and the B be not assembled in starting current, the start-up temperature in the battery and is being assembled in the starting current in the battery, the variation of start-up temperature.
Table 1
| Be not assembled in PTC matrix starting current (A) in the battery | PTC matrix starting current (A) in the lithium ion battery | Be not assembled in PTC matrix start-up temperature in the battery (℃) | PTC matrix start-up temperature in the lithium ion battery (℃) | |
| Lithium ion battery A | 4.7 | 5.9 | 100 | 115 |
| Lithium ion battery B | 4.7 | 4.9 | 100 | 103 |
By table 1 as seen, when the PTC matrix among lithium ion battery A, the B was not assembled in the battery, the normal temperature starting current was identical with start-up temperature, all was 4.7A and 100 ℃.And in being assembled in battery the time, the lithium ion battery A of Comparative Examples 1 preparation because the extruding and the distortion of the PTC matrix in the battery assembling process have directly caused the normal temperature starting current of PTC matrix and the rising of start-up temperature, is respectively 5.9A and 115 ℃.And the starting current of PTC matrix and start-up temperature are 4.9A and are 103 ℃ among the lithium ion battery B provided by the invention, are starkly lower than the starting current and the start-up temperature of the PTC matrix among the prepared lithium ion battery A of Comparative Examples 1.
The above results shows, existing relatively cylindrical lithium ion battery A, and the security performance of cylindrical lithium ion battery B provided by the invention obviously improves.When the battery overcurrent with when overheated, the PTC matrix among the cylindrical lithium ion battery B can OnNow, and internal resistance raises rapidly, and the expansion space is abundant, thereby the electric current among the restricted passage cylindrical lithium ion battery B has improved the security performance of battery.
Claims (8)
1. cylindrical lithium ion battery, this battery comprises electrode shell (1), wherein, this battery also comprises insulating barrier (4), PTC matrix (2), electric conductor (3) and conductive plate (5), described conductive plate (5) is positioned at the outside of electrode shell (1), described insulating barrier (4) is positioned between the edge of the edge of electrode shell (1) and conductive plate (5), described PTC matrix (2) is positioned at electrode shell (1), in the space that insulating barrier (4) and conductive plate (5) are impaled, two faces of described PTC matrix (2) are fixedly connected with electric conductor (3) respectively, and described electric conductor (3) is fixedlyed connected with conductive plate (5) with the outside of electrode shell (1) respectively.
2. battery according to claim 1, wherein, described PTC matrix (2) is circle or annular.
3. battery according to claim 1, wherein, the number of the electric conductor (3) on described PTC matrix (2) two sides is a plurality of.
4. battery according to claim 1, wherein, described electric conductor (3) is electrically connected with electrode shell (1) and conductive plate (5) respectively.
5. battery according to claim 1, wherein, described electric conductor (3) is a tabs, and an end of described tabs is fixedlyed connected with electrode shell (1), and the other end is fixedlyed connected with the one side of PTC matrix (2).
6. battery according to claim 1, wherein, described insulating barrier (4) is an annulus.
7. battery according to claim 1, wherein, described electrode shell (1) is an anode coat.
8. battery according to claim 1, wherein, described conductive plate (5) is circular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005201450350U CN2899126Y (en) | 2005-12-16 | 2005-12-16 | Cylindrical lithium-ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005201450350U CN2899126Y (en) | 2005-12-16 | 2005-12-16 | Cylindrical lithium-ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2899126Y true CN2899126Y (en) | 2007-05-09 |
Family
ID=38074458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2005201450350U Expired - Lifetime CN2899126Y (en) | 2005-12-16 | 2005-12-16 | Cylindrical lithium-ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2899126Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2323200A3 (en) * | 2009-11-16 | 2011-10-05 | Samsung SDI Co., Ltd. | Secondary battery and method of manufacturing the same |
| WO2012048652A1 (en) | 2010-10-16 | 2012-04-19 | Byd Company Limited | Lithium-ion battery |
| CN102456910A (en) * | 2010-10-16 | 2012-05-16 | 比亚迪股份有限公司 | Lithium ion power battery |
| CN105914330A (en) * | 2016-06-23 | 2016-08-31 | 苏州安靠电源有限公司 | Safety protection device of high-capacity battery pack |
| CN105932322A (en) * | 2016-06-23 | 2016-09-07 | 苏州安靠电源有限公司 | Cylindrical battery with external PTC structure |
-
2005
- 2005-12-16 CN CNU2005201450350U patent/CN2899126Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2323200A3 (en) * | 2009-11-16 | 2011-10-05 | Samsung SDI Co., Ltd. | Secondary battery and method of manufacturing the same |
| WO2012048652A1 (en) | 2010-10-16 | 2012-04-19 | Byd Company Limited | Lithium-ion battery |
| CN102456910A (en) * | 2010-10-16 | 2012-05-16 | 比亚迪股份有限公司 | Lithium ion power battery |
| JP2013543227A (en) * | 2010-10-16 | 2013-11-28 | シェンゼェン ビーワイディー オート アールアンドディー カンパニー リミテッド | Lithium ion battery |
| KR101492354B1 (en) * | 2010-10-16 | 2015-02-10 | 쉔젠 비와이디 오토 알앤디 컴퍼니 리미티드 | Lithium-ion battery |
| CN105914330A (en) * | 2016-06-23 | 2016-08-31 | 苏州安靠电源有限公司 | Safety protection device of high-capacity battery pack |
| CN105932322A (en) * | 2016-06-23 | 2016-09-07 | 苏州安靠电源有限公司 | Cylindrical battery with external PTC structure |
| WO2017219698A1 (en) * | 2016-06-23 | 2017-12-28 | 苏州安靠电源有限公司 | Cylindrical battery with external ptc structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6005633B2 (en) | ELECTROLYTE FOR ELECTROCHEMICAL DEVICE, PROCESS FOR PRODUCING THE SAME, AND ELECTROCHEMICAL DEVICE HAVING THE SAME | |
| US20230163313A1 (en) | Current collector, pole piece and battery | |
| CN112444753B (en) | Impedance test method for lithium analysis detection of lithium ion battery | |
| US20230282888A1 (en) | Electrochemical device | |
| KR101548789B1 (en) | Cable-type secondary battery and method for manufacturing the same | |
| US20070003838A1 (en) | Energy device | |
| CN1324756C (en) | Battery including rolled electrodes | |
| CN107768597B (en) | Battery pole piece, preparation method thereof and battery | |
| CN101359729B (en) | Lithium ionic secondary cell barrier, preparation and lithium ionic cell thereof | |
| CN1606183A (en) | Lithium secondary battery having ptc powder and manufacturing method thereof | |
| CN2899126Y (en) | Cylindrical lithium-ion battery | |
| CN1523688A (en) | Rechargeable, galvanic element with at least one lithium-intercalating electrode | |
| EP2009729A2 (en) | Evaluation method of separator for nonaqueous electrolyte battery, and nonaqueous electrolyte battery | |
| JP2010251197A (en) | Lithium ion battery | |
| CN109494413B (en) | Soft package lithium ion battery and preparation method thereof | |
| CN101814596A (en) | The manufacture method of electrode, electrode and lithium rechargeable battery | |
| CN115472776B (en) | Electrochemical device and electronic device | |
| JP5163026B2 (en) | Nonaqueous electrolyte secondary battery | |
| EP3624243B1 (en) | Bipolar secondary battery | |
| CN109167099A (en) | A kind of battery of high safety and preparation method thereof | |
| CN101501882B (en) | Lithium battery with external positive thermal coefficient layer | |
| CN1270400C (en) | Columnar lithium ion secondary cell | |
| CN1186846C (en) | Non-aqueous electrolyte secondary battery and mfg. method | |
| CN2891303Y (en) | Cylindrical lithium ion battery | |
| JP6843580B2 (en) | Lithium-ion battery manufacturing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070509 |
|
| EXPY | Termination of patent right or utility model |