CN106898724A - Power battery over-temperature fusing protection technology with strong overcurrent capacity - Google Patents
Power battery over-temperature fusing protection technology with strong overcurrent capacity Download PDFInfo
- Publication number
- CN106898724A CN106898724A CN201710251406.0A CN201710251406A CN106898724A CN 106898724 A CN106898724 A CN 106898724A CN 201710251406 A CN201710251406 A CN 201710251406A CN 106898724 A CN106898724 A CN 106898724A
- Authority
- CN
- China
- Prior art keywords
- melting
- low
- point metal
- metal block
- battery core
- 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.)
- Pending
Links
- 238000005516 engineering process Methods 0.000 title claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims abstract description 59
- 239000002184 metal Substances 0.000 claims abstract description 56
- 238000010438 heat treatment Methods 0.000 claims description 18
- 238000003466 welding Methods 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 3
- 238000005485 electric heating Methods 0.000 abstract description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 17
- 229910052744 lithium Inorganic materials 0.000 description 17
- 230000008018 melting Effects 0.000 description 8
- 238000002844 melting Methods 0.000 description 8
- 230000005611 electricity Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000007711 solidification Methods 0.000 description 5
- 230000008023 solidification Effects 0.000 description 5
- 230000000994 depressogenic effect Effects 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005496 eutectics Effects 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 206010020741 Hyperpyrexia Diseases 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
Classifications
-
- 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
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/581—Devices or arrangements for the interruption of current in response to temperature
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/10—Temperature sensitive devices
- H01M2200/103—Fuse
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention discloses a power battery over-temperature fusing protection technology with strong overcurrent capacity.A cover plate electrode of a battery core is connected with a current collecting plate through a low-resistance low-melting-point metal block, and when the temperature of one battery core exceeds the protection temperature of the battery core, the low-resistance low-melting-point metal block connected with the battery core can be fused, so that the current between the current collecting plate and the battery core is cut off, and the thermal runaway is prevented. According to the invention, the low-resistance low-melting-point metal block is additionally arranged between the battery cell cover plate electrode and the current collecting plate of the battery module, so that when the phenomena of module short circuit, battery cell short circuit, overcharge, overlarge load and the like occur, the low-resistance low-melting-point metal block connected with the current collecting plate is automatically fused and plays a role in protecting the battery, and the phenomenon of electric heating runaway is avoided.
Description
Technical field
The invention belongs to technical field of lithium batteries, and in particular to a kind of strong electrokinetic cell excess temperature fuse protection of conveyance capacity
Technology.
Background technology
In recent years, the advantages of lithium battery is with its high-energy-density, average voltage high, high-output power, long life quilt
It is widely used in the various occasions such as electric automobile, energy-accumulating power station, electric tool.Multiple battery cores are carried out by connection in series-parallel by bus-bar
Get up, the electric current of multiple battery cores is collected the battery pack for forming Large Copacity, so as to reach the requirement of power supply.With application model
The progressively expansion enclosed, the security of lithium battery is received significant attention.
During charging and discharging lithium battery, battery can produce heat with the component on high current path in itself, although electricity
The management system circuit of pond group can control the lithium battery discharge and recharge is carried out within the scope of certain temperature, but in some extreme cases
Under, such as collision battery pack is extruded or in the case that certain monomer occurs internal short-circuit, and battery some or multiple battery can be produced
Raw fierce internal-response simultaneously produces substantial amounts of heat, and these heats can then cause constant temperature in battery pack to rise, and phase
Mutually transmission, makes each battery cell in whole battery pack produce chain reaction.
On the other hand, such as there is inside and outside portion's short circuit or lithium battery is produced hyperpyrexia situations such as overcharging in lithium battery, cause
Partial electrolyte liquid is vaporized, and li battery shell is burst and is exploded, particularly as the lithium battery group of the automobile power energy, once certain
After one lithium battery explodes, coupled lithium battery can be guided to explode in succession due to the diffusion of heat, not only
The traveling of vehicle is had a strong impact on, potential safety hazard has also been brought, has had certain injury to the person, economic asset etc..And work as single
When the charging voltage of battery core is less than 2.4V higher than 4.2V or discharge voltage, battery capacity can be allowed to produce permanent decline, and make
Both positive and negative polarity is short-circuited, so as to cause lithium battery to explode.Also when the electric current of lithium battery is excessive, lithium ion have little time into
Enter memory location, material surface can be gathered in, lithium battery is exploded.
So needing to protect each lithium battery, prevent it from crossing thermal runaway, thereby may be ensured that the safety of battery pack
Operation.
The content of the invention
Goal of the invention of the invention is to provide a kind of strong electrokinetic cell excess temperature fuse protection technology of conveyance capacity, and it is right to realize
Battery core solar heat protection lost-control protection.
A kind of strong electrokinetic cell excess temperature fuse protection technology of conveyance capacity, the cover plate electrode of battery core passes through low resistance eutectic
Point metal derby is connected with collector plate, when wherein a certain battery core temperature exceedes its protection temperature, the low resistance being connected with the battery core
Low-melting-point metal block can then fuse, so as to disconnect the electric current between collector plate and the battery core, prevent thermal runaway.
Further scheme, the material of the low resistance low-melting-point metal block is the metal or alloy material that fusing point is 70-138 DEG C
Material.Such as tin, bismuth, indium, lead, cadmium or their alloy, it requirement to be fused can select low resistance according to lithium battery overheat
The material component of low-melting-point metal block.The low resistance low-melting-point metal block is cylindric or bulk, columned low melting point gold
Belong to a length of 2-10mm, a diameter of 2-10mm of block, preferably a length of 5mm, a diameter of 4mm；The length of block low-melting-point metal block
For 2-10mm, wide and thickness are 2-9mm, preferably 5*4*4mm or 4*3*3mm.
Further scheme, one end welding of the low resistance low-melting-point metal block or be threaded in battery core at least
On individual cover plate, the other end welding or be threaded in collector plate.
Further scheme, the welding includes arc stud welding, heating weldering, crosses fluid welding.
The present invention uses the cylinder that a kind of low melting point metal material is made as being conductively connected between battery core and collector plate
Post, heat production, the low resistance low melting point gold before battery thermal runaway under the abuse conditions such as be short-circuited when lithium battery, puncture, overcharging
Category block fuses and turn-off current first, quickly isolates overtemperature battery core, prevents battery core from discharging under over-temperature conditions and causes heat build-up
The catastrophe failure such as generation blast, on fire；Play a part of protect the battery core and other batteries, prevent it is more serious after
Really.It is different from the limited fuse protection technology of existing conveyance capacity, can super-high-current temperature protective device.
The present invention mainly uses the low feature of fusing point of low resistance low-melting-point metal block, once battery core causes because of abuse reason
Temperature is too high, and low resistance low-melting-point metal block can fuse rapidly, so that the connection between battery core and bus-bar is disconnected, to whole electricity
Pond group plays self-shield effect.
Between the cover plate electrode and collector plate of battery core, increase meets the low resistance low-melting-point metal of process requirements to the present invention
Block, and being reliably connected using specific welding procedure, so as to occur module short circuit, external short circuit in battery core, overcharge, load
During the phenomenon such as excessive, the low resistance low-melting-point metal block for connecting collector plate fuses automatically, so as to play protection battery core even battery
The effect of group, it is to avoid electric heating out-of-control phenomenon occur.The present invention mended lithium electricity industry single battery core be based on reliable, safety, can be electric greatly
Stream discharge and recharge, the industry blank of the temperature protection solution of low cost, with the stronger market competitiveness and application prospect.
The compatible excessive high current ability of excess temperature fuse protection mechanism of the invention and fuse protection, by metal selection
Fusing selection, carries out fusing point protection, temperature sensitive, while excessive excessively stream demand is not influenceed, more effectively plays each electricity
The safeguard protection of core physical level reliability.
The present invention can be used for large-scale energy-accumulating power station, family expenses energy-storage system, big multiplying power data center UPS equipment etc..
Specific embodiment
A kind of strong electrokinetic cell excess temperature fuse protection technology of conveyance capacity, the cover plate electrode of battery core passes through low resistance eutectic
Point metal derby is connected with collector plate, when wherein a certain battery core temperature exceedes its protection temperature, the low resistance being connected with the battery core
Low-melting-point metal block can then fuse, so as to disconnect the electric current between collector plate and the battery core, prevent thermal runaway.
Further scheme, the material of the low-melting-point metal block is the metal or alloy material that fusing point is 70-138 DEG C.
Further scheme, one end welding of the low resistance low-melting-point metal block or be threaded in battery core at least
On individual cover plate, the other end welding or be threaded in collector plate.
Further scheme, the welding includes arc stud welding, heating weldering, crosses fluid welding.
Specifically there is connected mode to be listed below, but be not limited only to following connected mode：
The first heating soldering method：
(1) to collector plate be heated to the melting temperature of low resistance low-melting-point metal block using constant temperature heating air pressure gun；
(2) low resistance low-melting-point metal block is depressed into the surface of collector plate, when low resistance low-melting-point metal block and afflux
The moment that the contact surface of plate melts, close constant temperature heating air pressure gun；
(3) close constant temperature heating air pressure gun while, to low resistance low-melting-point metal block and the contact surface of collector plate dry into
Row cooling, after low resistance low-melting-point metal block solidification after, will low resistance low-melting-point metal block linked into an integrated entity with collector plate；
(4) to the cover plate electrode of battery core be heated to the fusing point temperature of low resistance low-melting-point metal block using constant temperature heating air pressure gun
Degree；
(5) low resistance low-melting-point metal block is depressed into the surface of the cover plate of battery core, when low resistance low-melting-point metal block with
The moment that the contact surface of cover plate electrode melts, close constant temperature heating air pressure gun；
(6) while constant temperature heating air pressure gun is closed, dried to the contact surface of low resistance low-melting-point metal block and cover plate electrode
Cooled down, after low resistance low-melting-point metal block solidification after, will battery core, low resistance low-melting-point metal block and collector plate connect into
Integrally.
Second threaded connection method be：
(1) from the top cover electrode material identical fixing nut with battery core, it is welded on cover plate electrode；
(2) low resistance low-melting-point metal block is processed into screw shaped, its one end is threadedly coupled with fixing nut；
(3) to collector plate be heated to the melting temperature of low-melting-point metal screw rod using constant temperature heating air pressure gun；
(4) low resistance low-melting-point metal block is depressed into the top end face of collector plate, when low-melting-point metal screw rod and collector plate
Moment for melting of contact surface, close constant temperature heating air pressure gun；
(5) close constant temperature heating air pressure gun while, to low resistance low-melting-point metal block and the contact surface of collector plate dry into
Row cooling, after low resistance low-melting-point metal block solidification after, will battery core, low resistance low-melting-point metal block and collector plate connect into one
Body.
The third piercing welding method：
(1) to the cover plate electrode of battery core be heated to the fusing point temperature of low resistance low-melting-point metal block using constant temperature heating air pressure gun
Degree；
(2) low resistance low-melting-point metal block is processed into the boss-shaped that one end is big, one end is small, its big end is depressed into cover plate electricity
The top end face of pole, when the moment that the contact surface of low resistance low-melting-point metal block and cover plate electrode melts, closes thermostatic hot-air
Rifle；
(3) while constant temperature heating air pressure gun is closed, dried to the contact surface of low resistance low-melting-point metal block and cover plate electrode
Cooled down, after after the solidification of low resistance low-melting-point metal block, will low resistance low-melting-point metal block and cover plate electrode connect into one
Body；
(4) to collector plate be heated to the melting temperature of low resistance low-melting-point metal block using constant temperature heating air pressure gun；
(5) small end of low resistance low-melting-point metal block is pushed and through the through hole in collector plate, when low resistance low melting point
The small end of metal derby and the step surface of the through-hole wall of collector plate and low resistance low-melting-point metal block and the end face institute of collector plate
The moment that the contact surface of formation melts, close constant temperature heating air pressure gun；
(6) close constant temperature heating air pressure gun while, to low resistance low-melting-point metal block and the contact surface of collector plate dry into
Row cooling, after low resistance low-melting-point metal block solidification after, will battery core, low resistance low-melting-point metal block and collector plate connect into one
Body.
The preferred embodiment of patent of the present invention is the foregoing is only, not for limiting practical range of the invention；It is i.e. all
The various equivalents that right under this invention is done, are scope of the presently claimed invention.
Claims (4)
1. the strong electrokinetic cell excess temperature fuse protection technology of a kind of conveyance capacity, it is characterised in that：The cover plate electrode of battery core passes through
Low resistance low-melting-point metal block is connected with collector plate, when wherein a certain battery core temperature exceedes its protection temperature, connects with the battery core
The low resistance low-melting-point metal block for connecing can then fuse, so as to disconnect the electric current between collector plate and the battery core, prevent thermal runaway.
2. the strong electrokinetic cell excess temperature fuse protection technology of a kind of conveyance capacity according to claim 1, it is characterised in that：
The material of the low resistance low-melting-point metal block is the metal or alloy material that fusing point is 70-138 DEG C.
3. the strong electrokinetic cell excess temperature fuse protection technology of a kind of conveyance capacity according to claim 1, it is characterised in that：
In one end welding of the low resistance low-melting-point metal block or at least one cover plate that is threaded in battery core, other end welding
Or be threaded in collector plate.
4. the strong electrokinetic cell excess temperature fuse protection technology of a kind of conveyance capacity according to claim 3, it is characterised in that：
The welding includes arc stud welding, heating weldering, crosses fluid welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2017/087978 WO2018192072A1 (en) | 2017-04-17 | 2017-06-12 | Lithium-ion power battery thermal protection connection structure and connection method therefor |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710129544 | 2017-03-06 | ||
| CN2017101295441 | 2017-03-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106898724A true CN106898724A (en) | 2017-06-27 |
Family
ID=59196193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710251406.0A Pending CN106898724A (en) | 2017-03-06 | 2017-04-17 | Power battery over-temperature fusing protection technology with strong overcurrent capacity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106898724A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108896923A (en) * | 2018-06-28 | 2018-11-27 | 合肥国轩高科动力能源有限公司 | Device and method for testing overcurrent capacity of current collector of lithium battery |
| CN113193309A (en) * | 2021-04-23 | 2021-07-30 | 胡定灏 | Application of fusible alloy in power battery |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204303878U (en) * | 2014-12-05 | 2015-04-29 | 东莞市博钺电子有限公司 | There is conductive bus bar and the power battery pack thereof of excess current protective function |
| CN105140457A (en) * | 2015-09-02 | 2015-12-09 | 广州橙行智动汽车科技有限公司 | Battery connection piece structure and battery module |
| CN204946948U (en) * | 2015-07-24 | 2016-01-06 | 浙江天能能源科技有限公司 | A kind of lithium ion battery safe cap with fuse |
| CN205028969U (en) * | 2015-10-26 | 2016-02-10 | 四川长虹电源有限责任公司 | Lithium ion storage battery module |
| US20160093865A1 (en) * | 2014-09-26 | 2016-03-31 | Samsung Sdi Co., Ltd. | Rechargeable battery |
-
2017
- 2017-04-17 CN CN201710251406.0A patent/CN106898724A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160093865A1 (en) * | 2014-09-26 | 2016-03-31 | Samsung Sdi Co., Ltd. | Rechargeable battery |
| CN204303878U (en) * | 2014-12-05 | 2015-04-29 | 东莞市博钺电子有限公司 | There is conductive bus bar and the power battery pack thereof of excess current protective function |
| CN204946948U (en) * | 2015-07-24 | 2016-01-06 | 浙江天能能源科技有限公司 | A kind of lithium ion battery safe cap with fuse |
| CN105140457A (en) * | 2015-09-02 | 2015-12-09 | 广州橙行智动汽车科技有限公司 | Battery connection piece structure and battery module |
| CN205028969U (en) * | 2015-10-26 | 2016-02-10 | 四川长虹电源有限责任公司 | Lithium ion storage battery module |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108896923A (en) * | 2018-06-28 | 2018-11-27 | 合肥国轩高科动力能源有限公司 | Device and method for testing overcurrent capacity of current collector of lithium battery |
| CN113193309A (en) * | 2021-04-23 | 2021-07-30 | 胡定灏 | Application of fusible alloy in power battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170627 |