CN107425171A - Safe lithium battery pack with battery cells connected in locking mode through threads and connection method - Google Patents
Safe lithium battery pack with battery cells connected in locking mode through threads and connection method Download PDFInfo
- Publication number
- CN107425171A CN107425171A CN201710250382.7A CN201710250382A CN107425171A CN 107425171 A CN107425171 A CN 107425171A CN 201710250382 A CN201710250382 A CN 201710250382A CN 107425171 A CN107425171 A CN 107425171A
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- Prior art keywords
- melting
- low
- point metal
- screw rod
- bar
- Prior art date
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 17
- 229910052751 metal Inorganic materials 0.000 claims abstract description 107
- 239000002184 metal Substances 0.000 claims abstract description 105
- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- 238000002844 melting Methods 0.000 claims abstract description 13
- 230000008018 melting Effects 0.000 claims abstract description 13
- 238000003466 welding Methods 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims description 13
- 239000000956 alloy Substances 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 6
- 238000007711 solidification Methods 0.000 claims description 6
- 230000008023 solidification Effects 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 230000000994 depressogenic effect Effects 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 150000002739 metals Chemical class 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims 3
- 239000000155 melt Substances 0.000 description 3
- 229910001152 Bi alloy Inorganic materials 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 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
- 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
- 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
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 208000021760 high fever Diseases 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
- 239000000178 monomer Substances 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)
- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a safe lithium battery pack connected with a battery cell by utilizing thread locking and a connection method. The invention processes the low melting point metal screw into a screw rod with external thread, one end of the screw rod is connected with a fixed nut welded on the electrode of the battery cell in a threaded way, and the other end of the screw rod is connected with a bus bar in an end face heating welding way, a perforation heating welding way or a locking nut way. The invention utilizes the characteristic of low melting point of the low melting point metal block, once the temperature of the battery cell is overhigh due to abuse, the low melting point metal block can be quickly fused, thereby disconnecting the battery cell from the bus bar and playing a self-protection role for the whole battery pack.
Description
Technical field
The invention belongs to technical field of lithium batteries, and in particular to it is a kind of using screw thread lock connection battery core lithium battery group and
Connection method.
Background technology
In recent years, lithium battery is with quilt the advantages that 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 using model
The progressively expansion enclosed, the security of lithium battery receive significant attention.
During charging and discharging lithium battery, battery can produce heat with the component on high current path in itself, although electric
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, it is extruded or in the case that internal short-circuit occurs for some monomer as collided battery pack, battery some or multiple batteries can produce
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 transmit, each battery cell in whole battery pack is produced chain reaction.
On the other hand, lithium battery such as occurs inside and outside portion's short circuit or lithium battery is produced high fever 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, has also brought potential safety hazard, has had certain injury to the person, economic asset etc..And when single
When the charging voltage of battery core be less than 2.4V higher than 4.2V or discharge voltage, the permanent decline of battery capacity generation can be allowed, and make
Short circuit occurs for both positive and negative polarity, 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, can also lithium battery is exploded.
So needing to protect lithium battery, prevent it from crossing thermal runaway, the major accidents such as on fire, blast occur, so as to
The safe operation of battery pack can be ensured.
The content of the invention
It is an object of the invention to provide it is a kind of using screw thread lock connection battery core safe lithium battery group and connection method,
Thermal protection is carried out to lithium battery group so as to realize.
A kind of safe lithium battery group that connection battery core is locked using screw thread, include the bus-bar of connection battery core electrode, it is described
Connected between bus-bar and battery core electrode by low-melting-point metal screw rod.
Further scheme, the low-melting-point metal screw rod refer to that fusing point is made up of 70-138 DEG C of metal or alloy material,
Such as tin, bismuth, indium, lead, cadmium or their alloy, it can be overheated according to lithium battery and the requirement to be fused selects alloy compositions.
The low-melting-point metal screw rod is cylindric or block, a length of 2-10mm, a diameter of 2- of columned low-melting-point metal screw rod
10mm, preferably a length of 5mm, a diameter of 4mm；A length of 2-10mm, width and the thickness of block low-melting-point metal screw rod are 2-
9mm, preferably 5*4*4mm or 4*3*3mm.
The material of further scheme, the bus-bar and battery core electrode is copper.
The connected mode of low-melting-point metal screw rod in the present invention has three kinds：
One of which connected mode is：The top end face of the battery core electrode is welded with fixing nut, the low-melting-point metal
One end of screw rod is threadedly coupled with the fixing nut, the other end and bus-bar weld.
Further scheme, the welding are to melt the heating of low-melting-point metal screw rod, cool down and solidify on the busbar.
Another connected mode is:The top end face of the battery core electrode is welded with fixing nut, is opened up on the bus-bar
There is through hole；One end of the low-melting-point metal screw rod is threadedly coupled with the fixing nut, the other end passes through the through hole
Fixed afterwards with lock nut.
The third connected mode is：The top end face of the battery core electrode is welded with fixing nut, is opened up on the bus-bar
There is through hole；The low-melting-point metal screw rod is the boss-shaped that one end is big, one end is small, and its big end carries out screw thread with the fixing nut
Connection, small end are welded after passing through the through hole with bus-bar.
Another goal of the invention of the present invention is to provide the above-mentioned safe lithium battery group that connection battery core is locked using screw thread
Connection method, wherein the first connection method step are as follows：
(1) from the top cover material identical fixing nut with battery core, it is welded on battery core electrode；
(2) one end of low-melting-point metal screw rod is threadedly coupled with fixing nut, and by low-melting-point metal screw rod with
Battery core connects；
(3) to bus-bar be heated to the melting temperature of low-melting-point metal screw rod using constant temperature heating air pressure gun；
(4) cylinder is used, low-melting-point metal screw rod is depressed into the top end face of bus-bar, when low-melting-point metal screw rod is with converging
The moment that the contact surface of stream row melts, close constant temperature heating air pressure gun；
(5) while constant temperature heating air pressure gun is closed, carried out to the blowing of the contact surface of low-melting-point metal screw rod and bus-bar cold
But, after the solidification of low-melting-point metal screw rod, i.e., battery core, low-melting-point metal screw rod and bus-bar are linked into an integrated entity.
Second of connection method step is as follows：
(1) from the top cover material identical fixing nut with battery core, it is welded on battery core electrode；
(2) one end of low-melting-point metal screw rod is threadedly coupled with fixing nut, and by low-melting-point metal screw rod with
Battery core connects；
(3) through hole being engaged with low-melting-point metal screw rod is opened up on the busbar, by the another of low-melting-point metal screw rod
It is fixed after holding through through hole with lock nut, so as to which battery core, low-melting-point metal screw rod and bus-bar be linked into an integrated entity.
The third connection method step is as follows：
(1) from the top cover material identical fixing nut with battery core, it is welded on battery core electrode；
(2) the big end of the low-melting-point metal screw rod of boss-shaped is threadedly coupled with fixing nut, and low melting point is golden
Category screw rod connects with battery core；
(3) through hole being engaged with low-melting-point metal screw rod is opened up on the busbar, by the small end of low-melting-point metal screw rod
The surface of through hole on the busbar is placed, bus-bar is carried out being heated to low-melting-point metal block using constant temperature heating air pressure gun to melt
Point temperature；
(4) cylinder is used, the small end of low-melting-point metal block is pushed and passes through the through hole on bus-bar, 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；
(5) while constant temperature heating air pressure gun is closed, cooled down to the blowing of the contact surface of low-melting-point metal block and bus-bar,
After the solidification of low-melting-point metal block, i.e., battery core electricity, low-melting-point metal block and bus-bar are linked into an integrated entity.
Connection battery core electrode and bus-bar low-melting-point metal screw rod are processed into externally threaded screw shaped by the present invention, its
One end is threadedly coupled with the fixing nut being welded on battery core electrode, the other end and bus-bar carry out end face heating welding or
Perforation heating welding or lock nut connection.Its middle punch heating welding is that the end of low-melting-point metal block is set as into boss-shaped,
Its small end through welding is reheated after through hole on bus-bar, make the small end of low-melting-point metal block and the through-hole wall of bus-bar, with
And the contact surface that the step surface of low-melting-point metal block and the end face of bus-bar are formed melts, be affixed, so as to improve them
Between connection mechanical strength and electric property.
Welding is mainly low using the fusing point of low-melting-point metal block in the present invention, and when being heated to its melting temperature, it can melt
Melt and with copper bus-bar, battery core electrode adhesion, solidify after cooling, and reach the effect of welding.
The present invention is using the low feature of fusing point for mainly utilizing low-melting-point metal block, once battery core causes temperature because of abuse reason
When spending high, low-melting-point metal block can fuse rapidly, so as to disconnect the connection between battery core and bus-bar, quickly isolate overtemperature electricity
Core, prevent battery core from discharging in overheat conditions and cause heat build-up that the major accidents such as on fire, blast occur, thereby may be ensured that electricity
The safe operation of pond group.
Brief description of the drawings
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
Fig. 1 is schematic structural view of the invention；
Fig. 2 is the first connection sectional view of the invention；
Fig. 3 is second of connection sectional view of the invention；
In figure：1- battery cores, 2- battery core electrodes, 3- fixing nuts, 4- low-melting-point metal screw rods, 5- bus-bars, 6- locking screws
Cap.
Embodiment
As shown in figure 1, a kind of safe lithium battery group that connection battery core is locked using screw thread, including battery core 1 and connection battery core
The bus-bar 5 of electrode 2, connected between the bus-bar 5 and battery core electrode 2 by low-melting-point metal screw rod 4.
Further scheme, the low-melting-point metal screw rod 4 are made up of fusing point of 70-138 DEG C of metal or alloy material,
Such as sn-bi alloy, indium bismuth alloy.It can be overheated according to lithium battery and the requirement to be fused selects alloy compositions.
Further scheme, the material of the bus-bar 5 and battery core electrode 2 is copper.
The connected mode of low-melting-point metal screw rod in the present invention has three kinds：
One of which connected mode is as shown in Figure 2：The top end face of the battery core electrode 2 is welded with fixing nut 3, described low
One end of melting point metals screw rod 4 is threadedly coupled with the fixing nut 3, the other end and bus-bar 5 weld.
Further scheme, the welding are to melt the heating of low-melting-point metal screw rod, cool down and solidify on the busbar.
Another connected mode is as shown in Figure 3:The top end face of the battery core electrode 2 is welded with fixing nut 3, described to conflux
Through hole is offered on row 5；One end of the low-melting-point metal screw rod 4 is threadedly coupled with the fixing nut 3, the other end is worn
Fixed after crossing the through hole with lock nut 6.
The third connected mode is：The top end face of the battery core electrode 2 is welded with fixing nut 3, is opened on the bus-bar 5
Provided with through hole；The low-melting-point metal screw rod 4 is the boss-shaped that one end is big, one end is small, and its big end is carried out with the fixing nut 3
Threaded connection, small end weld after passing through the through hole with bus-bar 5.
Another goal of the invention of the present invention is to provide the above-mentioned safe lithium battery group that connection battery core is locked using screw thread
Connection method, wherein the first connection method step are as follows：
(1) from the top cover material identical fixing nut with battery core, it is welded on battery core electrode；
(2) one end of low-melting-point metal screw rod is threadedly coupled with fixing nut, and by low-melting-point metal screw rod with
Battery core connects；
(3) to bus-bar be heated to the melting temperature of low-melting-point metal screw rod using constant temperature heating air pressure gun；
(4) cylinder is used, low-melting-point metal screw rod is depressed into the top end face of bus-bar, when low-melting-point metal screw rod is with converging
The moment that the contact surface of stream row melts, close constant temperature heating air pressure gun；
(5) while constant temperature heating air pressure gun is closed, carried out to the blowing of the contact surface of low-melting-point metal screw rod and bus-bar cold
But, after the solidification of low-melting-point metal screw rod, i.e., battery core, low-melting-point metal screw rod and bus-bar are linked into an integrated entity.
Second of connection method step is as follows：
(1) from the top cover material identical fixing nut with battery core, it is welded on battery core electrode；
(2) one end of low-melting-point metal screw rod is threadedly coupled with fixing nut, and by low-melting-point metal screw rod with
Battery core connects；
(3) through hole being engaged with low-melting-point metal screw rod is opened up on the busbar, by the another of low-melting-point metal screw rod
It is fixed after holding through through hole with lock nut, so as to which battery core, low-melting-point metal screw rod and bus-bar be linked into an integrated entity.
The third connection method step is as follows：
(1) from the top cover material identical fixing nut with battery core, it is welded on battery core electrode；
(2) the big end of the low-melting-point metal screw rod of boss-shaped is threadedly coupled with fixing nut, and low melting point is golden
Category screw rod connects with battery core；
(3) through hole being engaged with low-melting-point metal screw rod is opened up on the busbar, by the small end of low-melting-point metal screw rod
The surface of through hole on the busbar is placed, bus-bar is carried out being heated to low-melting-point metal block using constant temperature heating air pressure gun to melt
Point temperature；
(4) cylinder is used, the small end of low-melting-point metal block is pushed and passes through the through hole on bus-bar, 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；
(5) while constant temperature heating air pressure gun is closed, cooled down to the blowing of the contact surface of low-melting-point metal block and bus-bar,
After the solidification of low-melting-point metal block, i.e., battery core electricity, low-melting-point metal block and bus-bar are linked into an integrated entity.
The preferred embodiment of patent of the present invention is the foregoing is only, is not used for limiting the practical range of the present invention；It is i.e. all
The various equivalents that right under this invention is done, are scope of the presently claimed invention.
Claims (10)
1. a kind of safe lithium battery group that connection battery core is locked using screw thread, 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 screw rod.
2. anti-overheat lithium battery group according to claim 1, it is characterised in that：The low-melting-point metal screw rod is by fusing point
It is made up of 70-138 DEG C of metal or alloy.
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 top end face of the battery core electrode is welded with solid
Determine nut, one end of the low-melting-point metal screw rod is threadedly coupled with the fixing nut, the welding of the other end and bus-bar.
5. safe lithium battery group according to claim 4, it is characterised in that：The welding is to add low-melting-point metal screw rod
Heat fusing, cooling and solidify on the busbar.
6. safe lithium battery group according to claim 1, it is characterised in that：The top end face of the battery core electrode is welded with solid
Determine nut, through hole is offered on the bus-bar；One end of the low-melting-point metal screw rod carries out screw thread with the fixing nut
Connection, the other end are fixed after passing through the through hole with lock nut.
7. safe lithium battery group according to claim 1, it is characterised in that：The top end face of the battery core electrode is welded with solid
Determine nut, through hole is offered on the bus-bar；The low-melting-point metal screw rod is the boss-shaped that one end is big, one end is small, and it is big
End is threadedly coupled with the fixing nut, small end welds after passing through the through hole with bus-bar.
8. a kind of connection method of the safe lithium battery group as claimed in claim 5 using screw thread locking connection battery core, it is special
Sign is：Its step is as follows：
（1）From the top cover material identical fixing nut with battery core, it is welded on battery core electrode；
（2）One end of low-melting-point metal screw rod is threadedly coupled with fixing nut, and by low-melting-point metal screw rod and battery core
Connect；
（3）To bus-bar be heated to the melting temperature of low-melting-point metal screw rod using constant temperature heating air pressure gun；
（4）Using cylinder, low-melting-point metal screw rod is depressed into the top end face of bus-bar, when low-melting-point metal screw rod and bus-bar
Moment for melting of contact surface, close constant temperature heating air pressure gun；
（5）While constant temperature heating air pressure gun is closed, cooled down, treated to the blowing of the contact surface of low-melting-point metal screw rod and bus-bar
After the solidification of low-melting-point metal screw rod, i.e., battery core, low-melting-point metal screw rod and bus-bar are linked into an integrated entity.
9. a kind of connection method of the safe lithium battery group as claimed in claim 6 using screw thread locking connection battery core, it is special
Sign is：Its step is as follows：
（1）From the top cover material identical fixing nut with battery core, it is welded on battery core electrode；
（2）One end of low-melting-point metal screw rod is threadedly coupled with fixing nut, and by low-melting-point metal screw rod and battery core
Connect；
（3）The through hole being engaged with low-melting-point metal screw rod is opened up on the busbar, and the other end of low-melting-point metal screw rod is worn
It is fixed after crossing through hole with lock nut, so as to which battery core, low-melting-point metal screw rod and bus-bar be linked into an integrated entity.
10. a kind of connection method of the safe lithium battery group as claimed in claim 7 using screw thread locking connection battery core, it is special
Sign is：Its step is as follows：
（1）From the top cover material identical fixing nut with battery core, it is welded on battery core electrode；
（2）The big end of the low-melting-point metal screw rod of boss-shaped is threadedly coupled with fixing nut, and by low-melting-point metal spiral shell
Bar connects with battery core；
（3）The through hole being engaged with low-melting-point metal screw rod is opened up on the busbar, and the small end of low-melting-point metal screw rod is placed
The surface of through hole on the busbar, to bus-bar be heated to the fusing point temperature of low-melting-point metal block using constant temperature heating air pressure gun
Degree；
（4）Using cylinder, the small end of low-melting-point metal block is pushed and passes through the through hole on bus-bar, when low-melting-point metal block
The contact surface hair that the through-hole wall and the step surface of low-melting-point metal block of small end and bus-bar and the end face of bus-bar are formed
The moment of raw fusing, close constant temperature heating air pressure gun；
（5）While constant temperature heating air pressure gun is closed, cooled down, treated low to the blowing of the contact surface of low-melting-point metal block and bus-bar
After the solidification of melting point metals block, i.e., battery core electricity, 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 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710129538 | 2017-03-06 | ||
| CN2017101295386 | 2017-03-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107425171A true CN107425171A (en) | 2017-12-01 |
Family
ID=60424189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710250382.7A Pending CN107425171A (en) | 2017-03-06 | 2017-04-17 | Safe lithium battery pack with battery cells connected in locking mode through threads and connection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107425171A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN205542914U (en) * | 2016-01-29 | 2016-08-31 | 广东精进能源有限公司 | Fire prevention high power capacity cylinder battery |
-
2017
- 2017-04-17 CN CN201710250382.7A patent/CN107425171A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN205542914U (en) * | 2016-01-29 | 2016-08-31 | 广东精进能源有限公司 | Fire prevention high power capacity cylinder battery |
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Application publication date: 20171201 |
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