CN202871904U - Novel cylindrical lithium lithium-manganese battery - Google Patents
Novel cylindrical lithium lithium-manganese battery Download PDFInfo
- Publication number
- CN202871904U CN202871904U CN 201220415862 CN201220415862U CN202871904U CN 202871904 U CN202871904 U CN 202871904U CN 201220415862 CN201220415862 CN 201220415862 CN 201220415862 U CN201220415862 U CN 201220415862U CN 202871904 U CN202871904 U CN 202871904U
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- plate
- lithium
- cap assembly
- positive
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- Y02E60/12—
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- Connection Of Batteries Or Terminals (AREA)
- Gas Exhaust Devices For Batteries (AREA)
- Primary Cells (AREA)
Abstract
The utility model discloses a novel cylindrical lithium lithium-manganese battery. The novel cylindrical lithium lithium-manganese battery comprises a positive plate manufactured by manganese dioxide, a negative plate manufactured by lithium metal, a separating film and a housing; the positive plate and the negative plate are separated by the separating film and are coiled to form a cylindrical core which is placed into the housing; a positive current collector and a negative current collector are also arranged in the housing; a positive cap assembly and a seal rubber ring are arranged in a part where an opening of the housing is formed; a part is cut off from the tail part of the negative plate, or a second negative electrode is arranged in a position, corresponding to the tail end of the positive plate, of the negative plate in a connecting way; the width ratio of the negative plate to the second negative electrode is 1: (0.9 to 0.5); and once over discharging occurs, the negative current collector and the lithium metal are disconnected in order to prevent the current and voltage from passing through the lithium metal which is flammable and combustible, so that the safety in use is ensured.
Description
Technical field
The utility model relates to field of batteries, particularly a kind of novel cylinder lithium-manganese cell of overdischarge safety.
Background technology
The cylinder lithium-manganese cell is because the advantage that voltage is high, electric current is large, self discharge is little, the life-span is long is more and more a large amount of for various electric equipments.Its discharge principle is that negative electrode lithium ion moves to positive pole by barrier film, negative pole lithium metal is along with discharge deeply gradually reduces until finish, but during for some floodlights such as glare light electric torchs, easily bring potential safety hazard: as, explode, catch fire, glare light electric torch is with the battery more than two, if use improperly, uses and all can cause battery over-discharge such as new used batteries mixing use, different brands battery mixing use, the inconsistent mixing of battery capacity; The battery metal lithium of overdischarge begins melting (rather than lithium ion migration), penetrates barrier film and is molten to positive pole and causes internal short-circuit, and large short circuit current raises suddenly internal temperature of battery, and thermal runaway causes at last battery explosion, catches fire.Promoted by negative voltage when the lithium metal melting process is battery over-discharge, the higher melting of negative voltage is just all the more acute.This process just can carried out below 100 ℃, so polymer switch (PTC) is to work.Negative pole will have the lithium metal that is not finished when lithium metal melting prerequisite was overdischarge in addition, and this uses the glare light electric torch high power discharge to cause.Glare light electric torch has widely demand in market, the security performance of battery must be guaranteed, but the cylinder lithium-manganese cell of prior art, the needs of not considering the overdischarge safe handling of glare light electric torch, national standard " safety requirements of lithium battery " GB 8897.4-2008 does not require the check of overdischarge will simulate the use of glare light electric torch, do overdischarge when test not the battery of regulation pre-arcing should use the heavy-current discharge of glare light electric torch, so be that potential safety hazard is arranged, therefore, how to prevent that the cylinder lithium-manganese cell from overdischarge occuring when glare light electric torch uses, blast, the problem such as catch fire, the technical problem that solves for the utility model.
The utility model content
The technical problems to be solved in the utility model is for overcoming weak point of the prior art, a kind of contacting of negative current collector and lithium metal of cutting off when overdischarge is provided, stop electric current, voltage by inflammable and explosive lithium metal, guarantee the Novel circular cylindricality lithium-manganese cell of safe handling.
For solving technical problem of the present utility model, the technical scheme that adopts is: a kind of Novel circular cylindricality lithium-manganese cell, comprise the positive plate of doing with manganese dioxide, negative plate with the lithium metal work, barrier film, shell, described positive plate and negative plate separate by barrier film, and be wound into cylindrical battery core, described cylindrical battery core is placed in the enclosure, plus plate current-collecting body also is set in the described shell, negative current collector, the opening part of described shell arranges the positive electrode cap assembly, O-ring seal, described shell is by the positive electrode cap assembly, the O-ring seal sealing is shaped, described negative current collector spot welding in the enclosure, the chassis welding of described plus plate current-collecting body and positive electrode cap assembly, also be provided with safety device in the described positive electrode cap assembly, be marked with electrolyte in the described shell, the afterbody of described negative plate cuts a part, and described negative plate afterbody is the first negative pole, the first negative pole width of corresponding positive plate end is less than the width of negative plate, and the Width of described negative plate and the first negative pole is 1: 0.9～0.5;
A kind of Novel circular cylindricality lithium-manganese cell, comprise the positive plate of doing with manganese dioxide, negative plate with the lithium metal work, barrier film, shell, described positive plate and negative plate separate by barrier film, and be wound into cylindrical battery core, described cylindrical battery core is placed in the enclosure, plus plate current-collecting body also is set in the described shell, negative current collector, the opening part of described shell arranges the positive electrode cap assembly, O-ring seal, described shell is by the positive electrode cap assembly, the O-ring seal sealing is shaped, described negative current collector spot welding in the enclosure, the chassis welding of described plus plate current-collecting body and positive electrode cap assembly, also be provided with safety device in the described positive electrode cap assembly, be marked with electrolyte in the described shell, the position connection of the corresponding positive plate end of described negative plate arranges the second negative pole, and the Width of described negative plate and the second negative pole is 1: 0.9～0.5.
Being connected by pressing or face is pressed and finished of described negative plate and the second negative pole;
Described safety device comprises rupture pressure disc and polymer switch;
The afterbody of described positive plate does not paste insulating tape, and the correspondence position negative reaction is accelerated in the discharge that tapers off to a point during discharge, and this place's negative pole easily is cut off when being convenient to overdischarge.
Beneficial effect with respect to prior art is, the afterbody of positive plate does not paste insulating tape, directly simple, saved the loaded down with trivial details operation of pasting insulating tape, the position of the corresponding positive plate end of negative plate is added thin negative pole or negative plate cut narrow, this place's negative pole easily is cut off when being convenient to overdischarge, stop electric current, voltage is by inflammable and explosive lithium metal, guarantee safe handling, by strict overdischarge test, the discharge process of simulation glare light electric torch overdischarge, when guaranteeing that glare light electric torch uses without catching fire, explosion phenomenon improves the fail safe that this cylindrical lithium manganese cell uses, compared with prior art, this product has obvious advantage, must occupy the interests field after putting into production, can bring good economic benefit.
Description of drawings
Fig. 1 is generalized section of the present utility model;
Fig. 2 is one of battery pole piece structure chart of the present utility model;
Fig. 3 is two of battery pole piece structure chart of the present utility model;
Fig. 4 is battery detecting line map of the present utility model.
Embodiment
Describe the utility model in detail below in conjunction with accompanying drawing, it illustrates principle of the present utility model as the part of this specification by embodiment, other aspects of the present utility model, and feature and advantage thereof will become very clear by this detailed description.
Such as Fig. 1, Fig. 2, shown in Figure 3, this Novel circular cylindricality lithium-manganese cell cuts off contacting of negative current collector and lithium metal when overdischarge, stops electric current, voltage by inflammable and explosive lithium metal, guarantees safe handling.This Novel circular cylindricality lithium-manganese cell, comprise the positive plate 3 of doing with manganese dioxide, negative plate 1 with the lithium metal work, barrier film 2, shell 5, described positive plate 3 separates by barrier film 2 with negative plate 1, and be wound into cylindrical battery core, described cylindrical battery core is placed in the shell 5, in the described shell 5 plus plate current-collecting body 9 is set also, negative current collector 4, be marked with electrolyte in the described shell 5, the opening part of described shell 5 arranges positive electrode cap assembly 8, O-ring seal 6, described shell 5 is by positive electrode cap assembly 8, O-ring seal 6 sealings are shaped, described negative current collector spot welding in the enclosure, described plus plate current-collecting body 9 welds with the chassis of positive electrode cap assembly 8, also be provided with safety device 7 in the described positive electrode cap assembly 8, described safety device 7 is arranged on the middle part of positive electrode cap assembly 8, described safety device 7 comprises rupture pressure disc and polymer switch P TC, guarantees the safe handling of battery; At first with negative current collector 4 spot welding in shell 5, with the chassis welding of plus plate current-collecting body 9 with positive electrode cap assembly 8, then positive plate 3 separates by barrier film 2 with negative plate 1, and be wound into cylindrical battery core, be placed in the shell 5, and injection electrolyte, positive electrode cap assembly 8 is covered opening at shell, and seal by O-ring seal 6;
Overdischarge occurs in the cylinder lithium-manganese cell when glare light electric torch uses in order to avoid, the problem such as explode, catch fire, and selected method is:
1) afterbody at described negative plate 1 cuts a part, described negative plate afterbody is the first negative pole 11, the first negative pole 11 width of corresponding positive plate end are less than the width of negative plate 1, and the Width of described negative plate 1 and the first negative pole 11 is K1: K2=1: 0.9～0.5; Simultaneously, the afterbody of positive plate 3 does not paste insulating tape, makes the discharge of positive plate 3 distal tip, strengthens the current density of the first negative pole 11, and when battery over-discharge occured, the first negative pole 11 will be put disconnected, thereby has protected battery;
2) in the connection of the position of described negative plate 1 corresponding positive plate 3 ends the second negative pole 12 is set, being connected by pressing or face is pressed and finished of described negative plate 1 and the second negative pole 12, the Width T1 of described negative plate 1 and the second negative pole 12: T2=1: 0.9～0.5, the afterbody of positive plate 3 does not paste insulating tape, make the discharge of positive plate 3 distal tip, strengthen the current density of the second negative pole 12, when battery over-discharge occurs when, the second negative pole 12 will be put disconnected, because positive plate 3 distal tip electric discharge phenomena, the negative plate of correspondence position is easy to put too early disconnected and affects the discharge capacity of battery, so the section of plugging into of negative plate 1 and the second negative pole 12 just places the end of positive plate;
Thus, change the width of the first negative pole 11, the thickness of the second negative pole 12 can be controlled the disconnection of negative plate lithium metal and collector, the thinner coefficient of safety of thickness is higher, but can sacrifice battery capacity, so the user looks its purposes and does adjustment in the scope in the time of can be according to practical operation, use to reach the most reasonably.
This product is before use through strict overdischarge test, and such as, the discharge process of a glare light electric torch overdischarge of simulation, as shown in Figure 4, B1 is tested battery, has carried out pre-arcing, with the current discharge of 1A 1 hour, namely is equivalent to discharge 75%; B2 ... B4 is the additional new battery of discharge not, and R1 is 8.2 Ω load resistances, requires to be tested battery discharge 24 hours, and is missing of ignition;
Final testing result:
Can obviously find out according to above-mentioned data, adopt this product can prevent effectively that internal temperature of battery from raising suddenly, thermal runaway, and then cause and to catch fire, even the accident such as blast are to reach the safe handling of battery.
The above execution mode only is used for illustrating the utility model, but is not limited to this.Under the condition that does not depart from the utility model design, affiliated technical field personnel can make suitable change and adjustment, and these change and adjustments also should be included within the claim protection range of the present utility model.
Claims (4)
1. Novel circular cylindricality lithium-manganese cell, comprise the positive plate of doing with manganese dioxide, negative plate with the lithium metal work, barrier film, shell, described positive plate and negative plate separate by barrier film, and be wound into cylindrical battery core, described cylindrical battery core is placed in the enclosure, plus plate current-collecting body also is set in the described shell, negative current collector, the opening part of described shell arranges the positive electrode cap assembly, O-ring seal, described shell is by the positive electrode cap assembly, the O-ring seal sealing is shaped, described negative current collector spot welding in the enclosure, the chassis welding of described plus plate current-collecting body and positive electrode cap assembly, also be provided with safety device in the described positive electrode cap assembly, be marked with electrolyte in the described shell, it is characterized in that: the afterbody of described negative plate cuts a part, described negative plate afterbody is the first negative pole, and the first negative pole width of corresponding positive plate end is less than the width of negative plate, and the Width of described negative plate and the first negative pole is 1: 0.9～0.5.
2. Novel circular cylindricality lithium-manganese cell, comprise the positive plate of doing with manganese dioxide, negative plate with the lithium metal work, barrier film, shell, described positive plate and negative plate separate by barrier film, and be wound into cylindrical battery core, described cylindrical battery core is placed in the enclosure, plus plate current-collecting body also is set in the described shell, negative current collector, the opening part of described shell arranges the positive electrode cap assembly, O-ring seal, described shell is by the positive electrode cap assembly, the O-ring seal sealing is shaped, described negative current collector spot welding in the enclosure, the chassis welding of described plus plate current-collecting body and positive electrode cap assembly, also be provided with safety device in the described positive electrode cap assembly, be marked with electrolyte in the described shell, it is characterized in that: the position connection of the corresponding positive plate end of described negative plate arranges the second negative pole, and the Width of described negative plate and the second negative pole is 1: 0.9～0.5.
3. Novel circular cylindricality lithium-manganese cell according to claim 2 is characterized in that: being connected by pressing or face is pressed and finished of described negative plate and the second negative pole.
4. Novel circular cylindricality lithium-manganese cell according to claim 1 and 2, it is characterized in that: described safety device comprises rupture pressure disc and polymer switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220415862 CN202871904U (en) | 2012-08-21 | 2012-08-21 | Novel cylindrical lithium lithium-manganese battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220415862 CN202871904U (en) | 2012-08-21 | 2012-08-21 | Novel cylindrical lithium lithium-manganese battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202871904U true CN202871904U (en) | 2013-04-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220415862 Expired - Fee Related CN202871904U (en) | 2012-08-21 | 2012-08-21 | Novel cylindrical lithium lithium-manganese battery |
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| Country | Link |
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| CN (1) | CN202871904U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105552397A (en) * | 2016-02-01 | 2016-05-04 | 宁波超霸能源有限公司 | Disposable wound product of lithium metal battery |
| CN106229527A (en) * | 2016-09-30 | 2016-12-14 | 宁波超霸能源有限公司 | Battery winding product and disposable lithium metal battery |
-
2012
- 2012-08-21 CN CN 201220415862 patent/CN202871904U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105552397A (en) * | 2016-02-01 | 2016-05-04 | 宁波超霸能源有限公司 | Disposable wound product of lithium metal battery |
| CN105552397B (en) * | 2016-02-01 | 2018-04-06 | 宁波超霸能源有限公司 | Disposable lithium metal battery winding product |
| CN106229527A (en) * | 2016-09-30 | 2016-12-14 | 宁波超霸能源有限公司 | Battery winding product and disposable lithium metal battery |
| CN106229527B (en) * | 2016-09-30 | 2018-08-17 | 宁波超霸能源有限公司 | Battery winding product and disposable lithium metal battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130410 Termination date: 20160821 |
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| CF01 | Termination of patent right due to non-payment of annual fee |