CN106941147A - Safe lithium battery pack with battery cells connected by constant-temperature heating and connection method - Google Patents
Safe lithium battery pack with battery cells connected by constant-temperature heating and connection method Download PDFInfo
- Publication number
- CN106941147A CN106941147A CN201710250357.9A CN201710250357A CN106941147A CN 106941147 A CN106941147 A CN 106941147A CN 201710250357 A CN201710250357 A CN 201710250357A CN 106941147 A CN106941147 A CN 106941147A
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- melting
- low
- point metal
- metal block
- bus
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Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 39
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims abstract description 152
- 239000002184 metal Substances 0.000 claims abstract description 148
- 230000008018 melting Effects 0.000 claims abstract description 27
- 238000002844 melting Methods 0.000 claims abstract description 27
- 238000003466 welding Methods 0.000 claims abstract description 19
- 230000008023 solidification Effects 0.000 claims abstract description 15
- 238000007711 solidification Methods 0.000 claims abstract description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052802 copper Inorganic materials 0.000 claims abstract description 6
- 239000010949 copper Substances 0.000 claims abstract description 6
- 238000007664 blowing Methods 0.000 claims description 14
- 230000000994 depressogenic effect Effects 0.000 claims description 13
- 239000000155 melt Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 8
- 239000000956 alloy Substances 0.000 claims description 6
- 239000007769 metal material Substances 0.000 claims description 4
- 230000005496 eutectics Effects 0.000 claims 2
- 150000002739 metals Chemical class 0.000 claims 2
- 238000001816 cooling Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910001152 Bi alloy Inorganic materials 0.000 description 1
- 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
- 230000005540 biological transmission 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
- MPZNMEBSWMRGFG-UHFFFAOYSA-N bismuth indium Chemical compound [In].[Bi] MPZNMEBSWMRGFG-UHFFFAOYSA-N 0.000 description 1
- JWVAUCBYEDDGAD-UHFFFAOYSA-N bismuth tin Chemical compound [Sn].[Bi] JWVAUCBYEDDGAD-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
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process 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
- 238000002955 isolation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000003303 reheating 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
- H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
-
- 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
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
-
- 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
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/02—Soldered or welded connections
- H01R4/028—Soldered or welded connections comprising means for preventing flowing or wicking of solder or flux in parts not desired
-
- 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 provides a safe lithium battery pack connected with a battery cell by constant-temperature heating and a connection method. The invention utilizes the characteristic of low melting point of the low melting point metal block, when the low melting point metal block is heated to the melting point temperature by adopting a constant temperature heating method, the low melting point metal block can be melted to be adhered with a copper busbar and a cell electrode, and solidification welding can be carried out after cooling. And once the temperature of the battery cell is too high due to abuse, the low-melting-point metal block can be rapidly fused, so that the connection between the battery cell and the bus bar is disconnected, and the self-protection effect on the whole battery pack is achieved.
Description
Technical field
The invention belongs to technical field of lithium batteries, and in particular to a kind of utilization heated at constant temperature connects the safe lithium battery of battery core
Group and connection method.
Background technology
In recent years, lithium battery is with quilt the advantages of its high-energy-density, high average voltage, high-output power, long life
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 to the battery pack for forming Large Copacity, so as to reach the requirement of power supply.With applying 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 lithium battery to carry out discharge and recharge within the scope of certain temperature, but in some extreme cases
Under, in the case that such as collision battery pack is extruded or internal short-circuit occurs for some monomer, battery some or multiple batteries 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, lithium battery such as occurs inside and outside portion's short circuit or lithium battery is produced hyperpyrexia situations such as overcharging, and causes
Partial electrolyte liquid is vaporized, and li battery shell is burst and exploded, particularly the lithium battery group as 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 has been had a strong impact on, potential safety hazard has also been brought, has had certain injury to the person, economic asset etc..And when single
When the charging voltage of battery core is higher than 4.2V or discharge voltage less than 2.4V, 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 that it from crossing thermal runaway, thereby may be ensured that the safety of battery pack
Operation.
The content of the invention
It is an object of the invention to provide a kind of safe lithium battery group of utilization heated at constant temperature connection battery core and connection method,
Realize and the overheat of lithium battery group is protected.
Technical scheme is as follows：
A kind of utilization heated at constant temperature connects the safe lithium battery group of battery core, includes the bus-bar of connection battery core electrode, described
Connected between bus-bar and battery core electrode by low-melting-point metal block welding.
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, such as
Tin, bismuth, indium, lead, cadmium or their alloy, it can the requirement to be fused selects low-melting-point metal block according to lithium battery overheat
Material component.The low-melting-point metal block be cylindric or bulk, a length of 2-10mm of columned low-melting-point metal spiral shell block,
A diameter of 2-10mm, preferably a length of 5mm, a diameter of 4mm；A length of 2-10mm of block low-melting-point metal block, width and thickness are equal
For 2-9mm, preferably 5*4*4mm or 4*3*3mm.
The material of further scheme, the bus-bar and battery core electrode is copper.
Further scheme, the low-melting-point metal block is cylindricality, and its two ends is logical to be respectively welded on bus-bar and battery core electricity
On extremely.
Further scheme, the low-melting-point metal block is to be offered on the boss-shaped that one end is big, one end is small, the bus-bar
The through hole being engaged with the small end of the low-melting-point metal block；The small end of the low-melting-point metal block is passed through after the through hole of bus-bar
Welded with bus-bar, big end and the battery core electrode welding of low-melting-point metal block.
Further scheme, the intermediate sleeve of the low-melting-point metal block is provided with division board, and the outer circumferential side of the division board leads to
Deflector is crossed to be connected with the outer circumferential side of battery core electrode and form collecting tank.
It is preferred that, the welding refers to melt the heating of low-melting-point metal block, cools down and be formed by fixedly connecting.
Another technical scheme of the present invention is to provide the safe lithium battery group of above-mentioned utilization heated at constant temperature connection battery core
Connection method, its connected mode has the step of two kinds, one of which connection method as follows：
(1) low-melting-point metal block is placed on to the surface of bus-bar using fixture by welding position, thermostatic hot-air is used
Rifle to bus-bar be heated to the melting temperature of low-melting-point metal block；
(2) cylinder is used, low-melting-point metal block is depressed into the top end face of bus-bar, when low-melting-point metal block and bus-bar
Moment for melting of contact surface, close constant temperature heating air pressure gun；
(3) while constant temperature heating air pressure gun is closed, cooled down to the contact surface blowing of low-melting-point metal block and bus-bar,
After after the solidification of low-melting-point metal block, i.e., low-melting-point metal block and bus-bar are linked into an integrated entity；
(4) the low-melting-point metal block linked into an integrated entity with bus-bar is placed on to the surface of battery core electrode, constant temperature is used
Heat gun to battery core electrode be heated to the melting temperature of low-melting-point metal block；
(5) cylinder is used, low-melting-point metal block is depressed into the top end face of battery core electrode, when low-melting-point metal block and battery core
The moment that the contact surface of electrode melts, close constant temperature heating air pressure gun；
(6) while constant temperature heating air pressure gun is closed, carried out to low-melting-point metal block and the contact surface blowing of battery core electrode cold
But, after after the solidification of low-melting-point metal block, i.e., battery core, low-melting-point metal block and bus-bar are linked into an integrated entity.
Another connected mode step is as follows：
(1) low-melting-point metal block is placed on to the surface of battery core electrode using fixture by welding position, constant temperature heating is used
Air pressure gun to battery core electrode be heated to the melting temperature of low-melting-point metal block；
(2) cylinder is used, low-melting-point metal block is depressed into the top end face of battery core electrode, when low-melting-point metal block and battery core
The moment that the contact surface of electrode melts, close constant temperature heating air pressure gun；
(3) while constant temperature heating air pressure gun is closed, carried out to low-melting-point metal block and the contact surface blowing of battery core electrode cold
But, after after the solidification of low-melting-point metal block, i.e., low-melting-point metal block is linked into an integrated entity with battery core electrode；
(4) the low-melting-point metal block linked into an integrated entity with battery core electrode is placed on to the surface of bus-bar, constant temperature is used
Heat gun to bus-bar be heated to the melting temperature of low-melting-point metal block；
(5) cylinder is used, low-melting-point metal block is depressed into the top end face of bus-bar or through the through hole on bus-bar, when
The moment that the contact surface of low-melting-point metal block and bus-bar melts, close constant temperature heating air pressure gun；
(6) while constant temperature heating air pressure gun is closed, cooled down to the contact surface blowing of low-melting-point metal block and bus-bar,
After after the solidification of low-melting-point metal block, i.e., battery core, low-melting-point metal block and bus-bar are linked into an integrated entity.
Low-melting-point metal block is made up of fusing point of 70-138 DEG C of metal or alloy material in the present invention, and such as tin bismuth is closed
Gold, indium bismuth alloy.It can the temperature requirement to be fused selects alloy compositions according to lithium battery overheat.
Connected mode of the low-melting-point metal block respectively between bus-bar, battery core electrode has two kinds, Yi Zhongshi in the present invention
It is connected again with battery core electrode after first low-melting-point metal block is first connected with bus-bar, another is first by low-melting-point metal block and electricity
Core electrode is connected with bus-bar again after first connecting.Low-melting-point metal block can be direct welding between bus-bar respectively, may be used also
To be that the end of low-melting-point metal block is set as into boss-shaped, it makes low melting point gold through reheating welding after through hole on bus-bar
What the through-hole wall and the step surface of low-melting-point metal block and the end face of bus-bar of the small end and bus-bar that belong to block were formed connects
Contacting surface melts, affixed, so that connection mechanical strength and electric property between improving them.
Connected mode is welding in the present invention, mainly uses the fusing point of low-melting-point metal block low, is heated to its fusing point temperature
When spending, its can melt and with copper bus-bar, battery core electrode adhesion, solidify after cooling, and reach the effect of welding.
Currently preferred is to be provided with division board in the intermediate sleeve of low-melting-point metal block, and the outer circumferential side of the division board passes through
Deflector is connected with the outer circumferential side of battery core electrode and forms collecting tank.When low-melting-point metal block is melted, overflow portion is then
Can enter with deflector in collecting tank, that is, realize isolation, prevent because its arbitrarily flowing drop onto in battery core and caused by
Short-circuit conditions occur.
The present invention is added using the low feature of fusing point for mainly using low-melting-point metal block using the method for heated at constant temperature
Heat arrive its melting temperature when, its can melt and with copper bus-bar, battery core electrode adhesion, after cooling be solidified welding.And one
Denier battery core causes temperature too high because of abuse reason, and low-melting-point metal block can fuse rapidly, so as to disconnect between battery core and bus-bar
Connection, whole battery pack is played self-shield effect.
Brief description of the drawings
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
Fig. 1 is first structure schematic diagram of the present invention；
Fig. 2 is the second structural representation of the invention；
In figure：1- battery cores；2- battery core electrodes；3- low-melting-point metal blocks, the small end of 3.1- low-melting-point metal blocks；4- confluxes
Row；5- division boards；6- deflectors.
Embodiment
A kind of utilization heated at constant temperature connects the safe lithium battery group of battery core, including battery core 1 and connection battery core electrode 2 conflux
Row 4, is welded to connect between the bus-bar 4 and battery core electrode 2 by low-melting-point metal block 3.
Further scheme, the material of the low-melting-point metal block 3 is the metal or alloy material that fusing point is 70-138 DEG C.
Further scheme, the material of the bus-bar 4 and battery core electrode 2 is copper.
As shown in figure 1, low-melting-point metal block 3 is cylindricality, its two ends is logical to be respectively welded on bus-bar 4 and battery core electrode 2
On.
As shown in Fig. 2 low-melting-point metal block 3 is one end is big, one end is small boss-shaped, offered on the bus-bar 4 with
The through hole that the small end 3.1 of the low-melting-point metal block is engaged；The small end 3.1 of the low-melting-point metal block is passed through on bus-bar 4
Through hole after with through-hole wall weld, big end and the battery core electrode 2 of low-melting-point metal block 3 are welded.
Further scheme, the intermediate sleeve of the low-melting-point metal block 3 is provided with division board 5, the outer circumferential side of the division board 5
It is connected by deflector 6 with the outer circumferential side of battery core electrode and forms collecting tank.
It is preferred that, the welding refers to melt the heating of low-melting-point metal block, cools down and be formed by fixedly connecting.
A kind of connection method of the safe lithium battery group of utilization heated at constant temperature connection battery core of the present invention, its connected mode has
It is three kinds, as follows the step of one of which connection method：
(1) low-melting-point metal block is placed on to the surface of bus-bar using fixture by welding position, thermostatic hot-air is used
Rifle to bus-bar be heated to the melting temperature of low-melting-point metal block；
(2) cylinder is used, low-melting-point metal block is depressed into the top end face of bus-bar, when low-melting-point metal block and bus-bar
Moment for melting of contact surface, close constant temperature heating air pressure gun；
(3) while constant temperature heating air pressure gun is closed, cooled down to the contact surface blowing of low-melting-point metal block and bus-bar,
After after the solidification of low-melting-point metal block, i.e., low-melting-point metal block and bus-bar are linked into an integrated entity；
(4) the low-melting-point metal block linked into an integrated entity with bus-bar is placed on to the surface of battery core electrode, constant temperature is used
Heat gun to battery core electrode be heated to the melting temperature of low-melting-point metal block；
(5) cylinder is used, low-melting-point metal block is depressed into the top end face of battery core electrode, when low-melting-point metal block and battery core
The moment that the contact surface of electrode melts, close constant temperature heating air pressure gun；
(6) while constant temperature heating air pressure gun is closed, carried out to low-melting-point metal block and the contact surface blowing of battery core electrode cold
But, after after the solidification of low-melting-point metal block, i.e., battery core, low-melting-point metal block and bus-bar are linked into an integrated entity.
The step of second of connected mode, is as follows：
(1) low-melting-point metal block is placed on to the surface of battery core electrode using fixture by welding position, constant temperature heating is used
Air pressure gun to battery core electrode be heated to the melting temperature of low-melting-point metal block；
(2) cylinder is used, low-melting-point metal block is depressed into the top end face of battery core electrode, when low-melting-point metal block and battery core
The moment that the contact surface of electrode melts, close constant temperature heating air pressure gun；
(3) while constant temperature heating air pressure gun is closed, carried out to low-melting-point metal block and the contact surface blowing of battery core electrode cold
But, after after the solidification of low-melting-point metal block, i.e., low-melting-point metal block is linked into an integrated entity with battery core electrode；
(4) the low-melting-point metal block linked into an integrated entity with battery core electrode is placed on to the surface of bus-bar, constant temperature is used
Heat gun to bus-bar be heated to the melting temperature of low-melting-point metal block；
(5) cylinder is used, low-melting-point metal block is depressed into the top face of bus-bar, when low-melting-point metal block is with confluxing
The moment that the contact surface of row melts, close constant temperature heating air pressure gun；
(6) while constant temperature heating air pressure gun is closed, cooled down to the contact surface blowing of low-melting-point metal block and bus-bar,
After after the solidification of low-melting-point metal block, i.e., battery core, low-melting-point metal block and bus-bar are linked into an integrated entity.
The third connected mode is as follows：
(1) using fixture by the big end of the low-melting-point metal block of boss-shaped by welding position be placed on battery core electrode just on
Side, to battery core electrode be heated to the melting temperature of low-melting-point metal block using constant temperature heating air pressure gun；
(2) cylinder is used, the big end of low-melting-point metal block the top end face of battery core electrode is depressed into, when low-melting-point metal block
The moment melted with the contact surface of battery core electrode, close constant temperature heating air pressure gun；
(3) while constant temperature heating air pressure gun is closed, carried out to low-melting-point metal block and the contact surface blowing of battery core electrode cold
But, after after the solidification of low-melting-point metal block, i.e., low-melting-point metal block is linked into an integrated entity with battery core electrode；
(4) the low-melting-point metal block linked into an integrated entity with battery core electrode is placed on to the surface of bus-bar, constant temperature is used
Heat gun to bus-bar be heated to the melting temperature of low-melting-point metal block；
(5) cylinder is used, the small end of low-melting-point metal block is pushed and the through hole on bus-bar is passed through, works as low-melting-point metal
The contact that the small end of block is formed with the step surface of the through-hole wall of bus-bar and low-melting-point metal block with the end face of bus-bar
The moment that face is melted, close constant temperature heating air pressure gun；
(6) while constant temperature heating air pressure gun is closed, cooled down to the contact surface blowing of low-melting-point metal block and bus-bar,
After after the solidification of low-melting-point metal block, i.e., battery core, low-melting-point metal block and bus-bar are linked into an integrated entity.
The foregoing is only the preferred embodiment of patent of the present invention, not for limit the present invention practical range；It is i.e. all
The various equivalents that right under this invention is done, are scope of the presently claimed invention.
Claims (9)
1. a kind of utilization heated at constant temperature connects the safe lithium battery group of battery core, include the bus-bar of connection battery core electrode, its feature
It is：Connected between the bus-bar and battery core electrode by low-melting-point metal block welding.
2. safe lithium battery group according to claim 1, it is characterised in that：The material of the low-melting-point metal block is fusing point
For 70-138 DEG C of metal or alloy material.
3. safe lithium battery group according to claim 1, it is characterised in that：The material of the bus-bar and battery core electrode is equal
To be copper.
4. safe lithium battery group according to claim 1, it is characterised in that：The low-melting-point metal block is cylindricality, and it two
End is logical respectively is welded on bus-bar and battery core electrode.
5. safe lithium battery group according to claim 1, it is characterised in that：The low-melting-point metal block be one end it is big, one
The through hole being engaged with the small end of the low-melting-point metal block is offered on the small boss-shaped in end, the bus-bar；The eutectic
The small end of point metal derby is welded after passing through the through hole of bus-bar with bus-bar, and big end and the battery core electrode of low-melting-point metal block are welded
Connect.
6. safe lithium battery group according to claim 5, it is characterised in that：The intermediate sleeve of the low-melting-point metal block is provided with
Division board, the outer circumferential side of the division board is connected with the outer circumferential side of battery core electrode by deflector and forms collecting tank.
7. the safe lithium battery group according to claim 4 or 5, it is characterised in that：The welding refers to low-melting-point metal
Block heating melts, cools down and be formed by fixedly connecting.
8. a kind of connection method of the safe lithium battery group of utilization heated at constant temperature connection battery core as claimed in claim 1, it is special
Levy and be：Its step is as follows：
（1）Low-melting-point metal block is placed on to the surface of bus-bar using fixture by welding position, constant temperature heating air pressure gun pair is used
Bus-bar be heated to the melting temperature of low-melting-point metal block；
（2）Using cylinder, low-melting-point metal block is depressed into the top end face of bus-bar, when connecing for low-melting-point metal block and bus-bar
The moment that contacting surface melts, close constant temperature heating air pressure gun；
（3）While constant temperature heating air pressure gun is closed, cooled down to the contact surface blowing of low-melting-point metal block and bus-bar, treated low
After the solidification of melting point metals block, i.e., low-melting-point metal block and bus-bar are linked into an integrated entity；
（4）The low-melting-point metal block linked into an integrated entity with bus-bar is placed on to the surface of battery core electrode, thermostatic hot-air is used
Rifle to battery core electrode be heated to the melting temperature of low-melting-point metal block；
（5）Using cylinder, low-melting-point metal block is depressed into the top end face of battery core electrode, when low-melting-point metal block and battery core electrode
Moment for melting of contact surface, close constant temperature heating air pressure gun；
（6）While constant temperature heating air pressure gun is closed, cooled down, treated to the contact surface blowing of low-melting-point metal block and battery core electrode
After the solidification of low-melting-point metal block, i.e., battery core, low-melting-point metal block and bus-bar are linked into an integrated entity.
9. a kind of connection method of the safe lithium battery group of utilization heated at constant temperature connection battery core as claimed in claim 1, it is special
Levy and be：Its step is as follows：
（1）Low-melting-point metal block is placed on to the surface of battery core electrode using fixture by welding position, constant temperature heating air pressure gun is used
To battery core electrode be heated to the melting temperature of low-melting-point metal block；
（2）Using cylinder, low-melting-point metal block is depressed into the top end face of battery core electrode, when low-melting-point metal block and battery core electrode
Moment for melting of contact surface, close constant temperature heating air pressure gun；
（3）While constant temperature heating air pressure gun is closed, cooled down, treated to the contact surface blowing of low-melting-point metal block and battery core electrode
After the solidification of low-melting-point metal block, i.e., low-melting-point metal block is linked into an integrated entity with battery core electrode；
（4）The low-melting-point metal block linked into an integrated entity with battery core electrode is placed on to the surface of bus-bar, thermostatic hot-air is used
Rifle to bus-bar be heated to the melting temperature of low-melting-point metal block；
（5）Using cylinder, low-melting-point metal block is depressed into the top end face of bus-bar or through the through hole on bus-bar, works as eutectic
The moment that the contact surface of point metal derby and bus-bar melts, close constant temperature heating air pressure gun；
（6）While constant temperature heating air pressure gun is closed, cooled down to the contact surface blowing of low-melting-point metal block and bus-bar, treated low
After the solidification of melting point metals block, i.e., battery core, low-melting-point metal block and bus-bar are linked into an integrated entity.
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 |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2017101295456 | 2017-03-06 | ||
| CN201710129545 | 2017-03-06 |
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| CN109192918A (en) * | 2018-07-27 | 2019-01-11 | 苏州市模度智能科技有限公司 | A kind of the single battery temperature device for fusing and its blowout method of power battery module |
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| CN103326142A (en) * | 2013-06-09 | 2013-09-25 | 北京依米康科技发展有限公司 | Low-melting-point metal cable continuation device |
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| CN106941147B (en) | 2020-07-17 |
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