CN109037544A - A kind of lithium-ion-power cell with thermal runaway control function - Google Patents
A kind of lithium-ion-power cell with thermal runaway control function Download PDFInfo
- Publication number
- CN109037544A CN109037544A CN201811216548.4A CN201811216548A CN109037544A CN 109037544 A CN109037544 A CN 109037544A CN 201811216548 A CN201811216548 A CN 201811216548A CN 109037544 A CN109037544 A CN 109037544A
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- China
- Prior art keywords
- conductive plate
- lithium
- ion
- battery
- thermal runaway
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
-
- 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
- H01M50/572—Means for preventing undesired use or discharge
-
- 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
Abstract
The invention discloses a kind of lithium-ion-power cells with thermal runaway control function, including hollow battery case (3), are provided with battery packet (4) in the battery case (3)；Left and right ends are respectively provided with positive terminal (1) and negative terminal (6) at the top of the battery packet (4)；The outer surface of the battery packet (4) is provided with a thermal runaway occluding device (2)；The thermal runaway occluding device (2) is connected with positive terminal (1) and negative terminal (6) respectively；The thermal runaway occluding device (2) is in contact with battery case (3), for transmitting the heat on battery case (3), and when temperature thereon rises to preset temperature value, so that battery short circuit occurs in the external of battery packet (4).The present invention is safe and reliable, it is possible to prevente effectively from internal short-circuit occurs for lithium-ion-power cell, prevents lithium-ion-power cell from safety accident occur since internal short-circuit occurs, guarantees the security performance of battery.
Description
Technical field
The present invention relates to battery technology fields, more particularly to a kind of lithium ion power electricity with thermal runaway control function
Pond.
Background technique
Currently, lithium ion battery has many advantages, such as that specific energy is high, has extended cycle life, not only on a portable electronic device such as
Mobile phone, DV and laptop computer are used widely, and are widely used in electric car, electric bicycle
And in terms of the large and medium-sized electrical equipment such as electric tool, therefore the security performance of lithium ion battery is required higher and higher.
New-energy automobile increasingly becomes the Strategic planning row of national governments as a kind of energy-saving and environment-friendly vehicles
Industry.Safety problem in new-energy automobile popularization and application had both been related to the security of the lives and property of the people, was also related to new energy
The sustainable and healthy development of source automobile industry.The safety of important component as new-energy automobile --- lithium-ion-power cell
Property also obtained more and more attention, Ministry of Industry and Information has issued " electric motor coach safety specification " and has reinforced to electrokinetic cell system
Safety test and supervision, wherein thermal runaway and thermal runaway extension embody lithium ion power electricity as important test item
The comprehensive safety performance in pond.In the use process of lithium ion battery, machinery abuse (is squeezed, is punctured), electrical to abuse (overcharging),
It is thermal runaway that above-mentioned several abuses, which are easiest to development,.
Heat transfer during thermal runaway is mainly thermally conductive, at present plastic housing power lithium-ion battery because shell wall it is thicker, lead
Hot property is poor, and heat can not disperse very well, and battery temperature is caused to rise, and diaphragm melts, and positive and negative electrode directly contacts, and causes big rule
Mould internal short-circuit, it is final to burn, or even explode, battery safety cannot be guaranteed.
For the prior art, it is that thermal insulation layer is set between adjacent battery mostly, can temporarily delays thermal runaway
Triggering, but does not prevent the progress of hot transmitting, when the temperature of inside battery rises to a certain extent, can still cause on a large scale
Internal short-circuit eventually leads to cells burst, or even the safety accident of battery explosion occurs, and fails fundamentally to solve battery thermal runaway
The problem of.
Therefore, there is an urgent need to develop a kind of technologies out at present, internal short-circuit can occur to avoid lithium-ion-power cell, prevent
Only there are the safety accidents such as burning, explosion since internal short-circuit occurs in lithium-ion-power cell, and lithium ion power electricity is effectively ensured
The security performance in pond.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of lithium-ion-power cell with thermal runaway control function,
It is safe and reliable, it is possible to prevente effectively from internal short-circuit occurs for lithium-ion-power cell, prevent lithium-ion-power cell due to short in occurring
Road and occur burning, explosion etc. safety accidents, the security performance of lithium-ion-power cell is effectively ensured, is conducive to widely answer
With being of great practical significance.
For this purpose, the present invention provides a kind of lithium-ion-power cells with thermal runaway control function, including hollow electricity
Pond shell is provided with battery packet in the battery case；
Left and right ends are respectively provided with positive terminal and negative terminal at the top of the battery packet；
The outer surface of the battery packet is provided with a thermal runaway occluding device；
The thermal runaway occluding device is connected with positive terminal and negative terminal respectively；
The thermal runaway occluding device is in contact with battery case, for transmitting the heat on battery case, and works as it
On temperature when rising to preset temperature value so that battery short circuit occurs in the external of battery packet.
Wherein, the front or the back side of the battery packet is arranged in the thermal runaway occluding device.
Wherein, the thermal runaway occluding device includes the first conductive plate and the second conductive plate, first conductive plate and the
Fitting is provided with barrier film between two conductive plates；
First conductive plate and the second conductive plate are spaced apart by the barrier film completely；
First conductive plate is connected by positive wire with positive terminal；
Second conductive plate is connected by negative wire with negative terminal；
First conductive plate is in contact with battery case；
Second conductive plate is in contact with the outer surface of the battery packet.
Wherein, one end of the positive wire is mutually welded with the first conductive plate, the other end and anode of the positive wire
Terminal mutually welds；
One end of the negative wire is mutually welded with the second conductive plate, the other end and the negative terminal phase of the negative wire
Welding.
Wherein, the outside of first conductive plate and the second conductive plate is enclosed with packaging film.
Wherein, the packaging film is the protective bag made of polypropylene PP material.
Wherein, the barrier film is film made of the organic and inorganic materials using fusing point between 90~130 DEG C.
Wherein, the barrier film is polyethylene PE film or vinyl-vinyl acetate copolymer eva film.
Wherein, the barrier film with a thickness of 10~50 μm.
Wherein, first conductive plate is copper sheet, with a thickness of 0.01~1mm；
Second conductive plate is aluminium sheet, with a thickness of 0.01~1mm.
By the above technical solution provided by the invention as it can be seen that compared with prior art, the present invention provides one kind to have
The lithium-ion-power cell of thermal runaway control function, it is safe and reliable, it is possible to prevente effectively from short in lithium-ion-power cell generation
Road prevents lithium-ion-power cell from the safety accidents such as burning, explosion occur since internal short-circuit occurs, it is dynamic that lithium ion is effectively ensured
The security performance of power battery is conducive to widely apply, be of great practical significance.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the lithium-ion-power cell with thermal runaway control function provided by the invention；
Fig. 2 is that thermal runaway blocks dress in a kind of lithium-ion-power cell with thermal runaway control function provided by the invention
The structure schematic diagram set；
Fig. 3 is that thermal runaway blocks dress in a kind of lithium-ion-power cell with thermal runaway control function provided by the invention
Set the schematic diagram of the section structure along vertical direction；
In figure, 1, positive terminal, 2, thermal runaway occluding device, 3, battery case, 4, battery packet, 5, battery cover board, 6,
Negative terminal；
21, positive wire, 22, negative wire, 23, packaging film, the 24, first conductive plate, 25, barrier film, 26, second is conductive
Plate.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, with reference to the accompanying drawing with embodiment to this
Invention is described in further detail.
Referring to Fig. 1 to Fig. 3, the present invention provides a kind of lithium-ion-power cell with thermal runaway control function, applications
In the security protection to lithium-ion-power cell, including hollow battery case 3, battery is provided in the battery case 3
Packet 4；
The 4 top left and right ends of battery packet are respectively provided with positive terminal 1 and negative terminal 6；
The outer surface (being not limited to front shown in FIG. 1) of the battery packet 4 is provided with a thermal runaway occluding device 2；
The thermal runaway occluding device 2 is connected with positive terminal 1 and negative terminal 6 respectively；
The thermal runaway occluding device 2 is in contact with battery case 3, for transmitting the heat on battery case 3, and works as
When temperature (temperature of barrier film specially therein) thereon rises to preset temperature value, so that in the outside of battery packet 4
Battery short circuit occurs, i.e. generation battery external short circuit, the blocking of shape battery pair thermal runaway process.
In the present invention, in specific implementation, the top heat-sealing of the battery case 3 has a battery cover board 5；
The top of the positive terminal 1 and negative terminal 6 is exposed to the top of battery cover board 5.
In the present invention, in specific implementation, the thermal runaway occluding device 2 is preferably arranged on the battery packet 4
Heat transfer is better achieved to increase the contact area between battery case 3 in front or the back side.
In the present invention, in specific implementation, the thermal runaway occluding device 2 includes the first conductive plate 24 and the second conductive plate
26, fitting is provided with barrier film 25 between first conductive plate 24 and the second conductive plate 26；
First conductive plate 24 and the second conductive plate 26 are spaced apart by the barrier film 25 completely, so that the two does not occur
Contact；
First conductive plate 24 is connected by positive wire 21 with positive terminal 1；
Second conductive plate 26 is connected by negative wire 22 with negative terminal 6；
First conductive plate 24 is in contact with battery case 3；
Second conductive plate 26 is in contact with the outer surface of the battery packet 4.
It should be noted that the temperature of battery case 3 rises, and the first conductive plate 24 can have when single battery is heated
Heat on effect ground transmitting battery case 3 is into barrier film 25, so that barrier film 25 is blocked since heating temperature is increased reaching
When the fusing point of film 25, barrier film 25 is melted, so that the first conductive plate 24 and the second conductive plate 26 occur directly to contact, thus conductive
Connection, so that positive terminal 1 is mutually conductively connected with negative terminal 6, battery short circuit occurs for external in battery packet 4.
It should also be noted that, the second conductive plate 26 can play conductive, thermally conductive effect, it can guarantee that barrier film 25 can
It is heated up with reliably absorbing heat, melts play a role in time.
In specific implementation, one end and 24 phase of the first conductive plate of the positive wire 21 are welded, the positive wire 21
The other end is mutually welded with positive terminal；
One end of the negative wire 22 is welded with 26 phase of the second conductive plate, the other end and cathode of the negative wire 22
The welding of 6 phase of terminal.
In specific implementation, the outside of first conductive plate 24 and the second conductive plate 26 is enclosed with packaging film 23.
In the present invention, in specific implementation, the lithium-ion-power cell is preferably rectangular cell, preferably plastic housing lithium ion
Power battery is also applicable on other batteries certainly, and the thickness of the battery case 3 is preferably 3.5~8mm.
In specific implementation, the packaging film 23 be preferably using polypropylene PP material production protective bag, fusing point be 150~
180 DEG C, thickness is preferably 0.1~0.5mm.
In specific implementation, the barrier film 25 is preferably polyethylene PE film or vinyl-vinyl acetate copolymer
Eva film, or using film made of other organic and inorganic materials (fusing point is between 90~130 DEG C), wherein it is described poly-
The fusing point of ethylene PE film is 100~130 DEG C, and the fusing point of vinyl-vinyl acetate copolymer eva film is 90~100 DEG C.
In specific implementation, the thickness of the barrier film 25 is preferably 10~50 μm.
In specific implementation, first conductive plate 24 is preferably copper sheet, further preferably using copper made of red copper T2
Plate, thickness are preferably 0.01~1mm, can be multilayer or single layer.
In specific implementation, second conductive plate 26 is preferably aluminium sheet, and further preferably 1060 aluminium sheets, thickness is preferred
It can be multilayer or single layer for 0.01~1mm.
It should be noted that for the present invention, belong to lithium ion battery power safety technical field, institute its in lithium ion
The internal positive of power battery, one in parallel of cathode both ends are led by packaging film, the first conductive plate (such as copper sheet), barrier film, second
The thermal runaway occluding device of battery plate (such as aluminium sheet) and packaging film composition.Therefore, when the thermal runaway of lithium ion battery power battery is touched
After hair, barrier film, which will be shunk, even melts, so that the first conductive plate (such as copper sheet) and the second conductive plate (such as aluminium sheet) are direct
Contact is conductive, to cause the external short circuit of battery, the not internal uncontrollable short circuit of this short circuit passes through returning for design
Short circuit is realized on road, and therefore, the present invention can effectively discharge the energy of battery storage in time, is avoided uncontrollable due to occurring
Thermal runaway caused by chemical reaction.
It for the present invention, burns except avoiding causing, or even explosion is outer, also effectively prevents making because of uncontrollable chemical reaction
At poisonous and harmful substances release, reduce or avoid environmental pollution.
Based on above technical scheme it is found that design is scientific and reasonable for lithium-ion-power cell provided by the invention, symbol
Scientific law is closed, working principle is safe and reliable, and operation is easy, can be effectively blocked the generation of thermal runaway, guarantees lithium ion power
The safety of battery.
For the present invention, the barrier film in the structure can be replaced according to the usage of battery, made to meet safety
It is at low cost with the needs for the battery that different temperatures requires.
It is first when producing assembly for the lithium-ion-power cell provided by the invention with thermal runaway control function
First, increase a thermal runaway occluding device 2 inside the battery case of single battery, in the thermal runaway occluding device 2, just
The welding of the positive terminal 1 of 21 one end of pole lead and single battery is connected, and the other end welds phase with the second conductive plate (such as aluminium sheet) 26
Connection, and the welding of the negative terminal 2 of one end of negative wire 22 and single battery is connected, the other end and the first conductive plate 24
(such as copper sheet) welding is connected, and by barrier film 25 be put in the second conductive plate (such as aluminium sheet) 26 and the first conductive plate 24 (such as copper sheet) it
Between be bonded it is close；
Then, it is put in packaging film 23, the fusing point of barrier film 25 is 90~130 DEG C, and packaging film 23 protects battery packet 4
Diaphragm not pierced through by external force；
Then, thermal runaway occluding device 2 and battery packet 4 are put into battery case 3 simultaneously；
Finally, battery cover board 5 is heat sealed on battery case 3.
When single battery is heated, 3 temperature of battery case rises, and by heat transfer, the first conductive plate 24 is heated, works as temperature
When reaching 90~130 DEG C, barrier film 25 is melted, and the first conductive plate 24 (such as copper sheet) and the second conductive plate (such as aluminium sheet) 26 occur
It directly contacts, to cause the external short circuit of battery, therefore, battery can effectively be avoided to cause burning, quick-fried because internal short-circuit occurs
Fried safety accident.Therefore, the present invention can effectively discharge the energy of battery storage in time, avoid uncontrollable due to occurring
Chemical reaction caused by thermal runaway.
By examining.For general common existing lithium-ion-power cell, when carrying out thermal runaway test, temperature is most
600 DEG C of promotion or more, it will vigorous combustion；And for the present invention, after increasing thermal runaway occluding device, battery cell into
When row thermal runaway is tested, the external short circuit of battery can be caused, by the circuit of design so as to effectively by battery storage
Energy discharge in time, avoid thermal runaway caused by since uncontrollable chemical reaction occurs that from capable of filling the present invention
Divide the requirement for meeting that thermal runaway is tested in Ministry of Industry and Information " electric motor coach safety specification ".
Compared with prior art, the invention has the characteristics that:
1, the present invention can effectively block thermal runaway, guarantee the safety of lithium-ion-power cell.
2, the present invention only needs special thermal runaway occluding device in parallel in the production process, and production process is simple and easy, pacifies
It is complete reliable, it is at low cost.
3, of the invention, it is not limited to the shape of battery case, size, the plastic housing lithium-ion-power cell suitable for any shape
Or other batteries, it can be the battery applied to any one outside heating conduction difference, applied new energy can be significantly improved
The safety of source automobile.
In conclusion compared with prior art, a kind of lithium ion with thermal runaway control function provided by the invention
Power battery, it is safe and reliable, it is possible to prevente effectively from internal short-circuit occurs for lithium-ion-power cell, prevent lithium-ion-power cell
There are the safety accidents such as burning, explosion since internal short-circuit occurs, the security performance of lithium-ion-power cell is effectively ensured, favorably
In widely applying, it is of great practical significance.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of lithium-ion-power cell with thermal runaway control function, which is characterized in that including hollow battery case
(3), battery packet (4) are provided in the battery case (3)；
Left and right ends are respectively provided with positive terminal (1) and negative terminal (6) at the top of the battery packet (4)；
The outer surface of the battery packet (4) is provided with a thermal runaway occluding device (2)；
The thermal runaway occluding device (2) is connected with positive terminal (1) and negative terminal (6) respectively；
The thermal runaway occluding device (2) is in contact with battery case (3), for transmitting the heat on battery case (3), and
When temperature thereon rises to preset temperature value, so that battery short circuit occurs in the external of battery packet (4).
2. lithium-ion-power cell as described in claim 1, which is characterized in that thermal runaway occluding device (2) setting exists
The front or the back side of the battery packet (4).
3. lithium-ion-power cell as described in claim 1, which is characterized in that the thermal runaway occluding device (2) includes the
One conductive plate (24) and the second conductive plate (26) are bonded between first conductive plate (24) and the second conductive plate (26) and are provided with
Barrier film (25)；
First conductive plate (24) and the second conductive plate (26) are spaced apart by the barrier film (25) completely；
First conductive plate (24) is connected by positive wire (21) with positive terminal (1)；
Second conductive plate (26) is connected by negative wire (22) with negative terminal (6)；
First conductive plate (24) is in contact with battery case (3)；
Second conductive plate (26) is in contact with the outer surface of the battery packet (4).
4. lithium-ion-power cell as claimed in claim 3, which is characterized in that one end and first of the positive wire (21)
Conductive plate (24) mutually welds, and the other end of the positive wire (21) is mutually welded with positive terminal；
One end of the negative wire (22) is mutually welded with the second conductive plate (26), the other end of the negative wire (22) and negative
Extreme son (6) is mutually welded.
5. lithium-ion-power cell as claimed in claim 3, which is characterized in that first conductive plate (24) and the second conduction
The outside of plate (26) is enclosed with packaging film (23).
6. lithium-ion-power cell as claimed in claim 5, which is characterized in that the packaging film (23) is using polypropylene PP
The protective bag of material production.
7. lithium-ion-power cell as claimed in claim 3, which is characterized in that the barrier film (25) is using fusing point 90
Film made of organic and inorganic materials between~130 DEG C.
8. lithium-ion-power cell as claimed in claim 3, which is characterized in that the barrier film (25) is that polythene PE is thin
Film or vinyl-vinyl acetate copolymer eva film.
9. lithium-ion-power cell as claimed in claim 8, which is characterized in that the barrier film (25) with a thickness of 10~50
μm。
10. the lithium-ion-power cell as described in any one of claim 3 to 9, which is characterized in that first conductive plate
It (24) is copper sheet, with a thickness of 0.01~1mm；
Second conductive plate (26) is aluminium sheet, with a thickness of 0.01~1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811216548.4A CN109037544A (en) | 2018-10-18 | 2018-10-18 | A kind of lithium-ion-power cell with thermal runaway control function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811216548.4A CN109037544A (en) | 2018-10-18 | 2018-10-18 | A kind of lithium-ion-power cell with thermal runaway control function |
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| Publication Number | Publication Date |
|---|---|
| CN109037544A true CN109037544A (en) | 2018-12-18 |
Family
ID=64613550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811216548.4A Pending CN109037544A (en) | 2018-10-18 | 2018-10-18 | A kind of lithium-ion-power cell with thermal runaway control function |
Country Status (1)
| Country | Link |
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| CN109860740A (en) * | 2019-02-18 | 2019-06-07 | 华为技术有限公司 | A kind of control method, device and battery pack for alleviating the sprawling of battery pack thermal runaway |
| CN113764835A (en) * | 2020-05-27 | 2021-12-07 | 荣盛盟固利新能源科技有限公司 | Battery safety protection device and laminated lithium ion battery |
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