CN207381467U - The nickel sheet structure of lithium battery monomer controlled current flow design - Google Patents
The nickel sheet structure of lithium battery monomer controlled current flow design Download PDFInfo
- Publication number
- CN207381467U CN207381467U CN201721398325.5U CN201721398325U CN207381467U CN 207381467 U CN207381467 U CN 207381467U CN 201721398325 U CN201721398325 U CN 201721398325U CN 207381467 U CN207381467 U CN 207381467U
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- China
- Prior art keywords
- nickel sheet
- current flow
- lithium battery
- battery core
- controlled current
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The utility model belongs to new-energy automobile field, and in particular to a kind of nickel sheet structure of lithium battery monomer controlled current flow design.Including nickel sheet parallel connection area, nickel sheet helical structure, nickel sheet welding section, nickel sheet welding section is welded in battery core, and nickel sheet parallel connection area connects several nickel sheet helical structures.The utility model is cost-effective, and nickel sheet structure is suitable for most common electric resistance welding technique rather than using complicated special welding procedure；Nickel sheet structure can save the processing technology of nickel sheet weld " pressing and bending ", and welding effect is more preferable, reduce and point rate is fried in battery core pinpoint welding procedure.
Description
Technical field
The invention belongs to new-energy automobile fields, and in particular to a kind of nickel sheet knot of lithium battery monomer controlled current flow design
Structure.
Background technology
1st, the content of related art
Lithium battery connection in series-parallel, as conductive material, using electric resistance welding technique, passes through one whole nickel generally using nickel sheet
Piece welds together groups of multiple battery cores, just forms parallel circuit at this time.
The operation principle of electric resistance welding is to apply pressure, the contact surface and adjacent domain for passing through connector using electric current by electrode
The method that the resistance heat of generation is welded.Therefore nickel sheet is concave shape in the basic original shape of the structure with battery core weld
Shape, " electrode " apply the both sides raised position of concave pressure, in the middle part of concave gap be in order to increase resistance, and then
Forceful electric power thermal resistance is being generated with battery core contact surface, such nickel sheet is welded more secured with battery core.
It links, uses as part high-end enterprise employs professional fuse in the junction of nickel sheet in parallel and each battery core
Ultrasonic welding process, fuse welding is fine, and workmanship is complicated.
2nd, the problems of the prior art and defect
1) when multiple battery cores it is in parallel with nickel sheet welding in groups after, after wherein certain battery core internal short-circuit, this module in parallel with
I.e. short circuit causes circuit, and rise causes persistent fever inside this battery core to back flow current rapidly, if fever is violent, meeting in the short time
Trigger thermal runaway and burn, all burning is on fire for final whole group battery pack, and whole process is unable to control, and security risk is big.
2) common nickel sheet structure is to meet most basic connection in series-parallel conducting function, does not introduce stream loading protection
Function, however the high-end vehicle enterprise in part has incorporated and has crossed stream loading defencive function, but its used material palpus specific customization, and
Welding procedure is complicated, and the equipment cost of introduction is higher, and needs professional technique operating personnel, to domestic medium-sized and small enterprises so
High cost can not be realized.
3) easily (not prison welding is solid or nickel sheet is because of heavy current for the fried point of appearance in the welding process for existing nickel sheet concave structure
And the phenomenon that blowing), the reason is that nickel sheet is not bonded completely with battery core causes virtual connection, when electrode discharge moment forceful electric power by after burnt
It is disconnected, certain loss is caused in the welding process.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of nickel sheet structure of lithium battery monomer controlled current flow design, because of list
Current reflux caused by body battery core internal short-circuit, and cause battery core persistent fever and caused by thermal runaway and the problem of burn；This
Invention another to be solved technical problem is that nickel sheet is bonded insecure the problem of causing fried point with battery core weld.
In order to solve the above technical problems, a kind of nickel sheet structure of lithium battery monomer controlled current flow design of the present invention, including nickel
Piece parallel connection area, nickel sheet helical structure, nickel sheet welding section, nickel sheet welding section are welded in battery core, and nickel sheet parallel connection area is by several nickel sheet spiral shells
Revolve structure connection.
Nickel sheet helical structure is connected to nickel sheet parallel connection area by overcurrent load position.
Overcurrent payload portion bit width is most thin.
Nickel sheet parallel connection area forms certain difference in height h with battery core surface.
When high current is by the nickel sheet structure, and more than after design limit electric current, nickel sheet is melted disconnected immediately.
The advantageous effects of the present invention are：It is cost-effective.Nickel sheet structure is suitable for most common electric resistance welding work
Skill rather than the welding procedure for using complexity special；
Nickel sheet structure can save the processing technology of nickel sheet weld " pressing and bending ", and welding effect is more preferable, reduce battery core
Point rate is fried in pinpoint welding procedure.
Without special fuse material, but common pure nickel piece, only it need to change nickel sheet geomery and knot at battery core
Structure, you can reach overload protective function, realize the design of battery core controlled current flow.
On lithium battery itself " internal short-circuit " is solved the problems, such as, back flow current can be cut off in time, reduce battery core fever, drop
Low entire battery pack spontaneous combustion probability improves pack electrokinetic cell system securities.
Description of the drawings
Fig. 1 welds schematic diagram for a kind of nickel sheet of the present invention with battery core；
Fig. 2 is battery nickel sheets structural design drawing；
Fig. 3 is operating diagram.
In figure, 1 it is nickel sheet parallel connection area, 2 is nickel sheet helical structure, 3 nickel sheet welding sections, 4 battery cores, 5 overcurrent load positions, 6
It is battery core fixing device for nickel sheet structure, 7.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.
A kind of nickel sheet structure of lithium battery monomer controlled current flow design of the present invention, including nickel sheet parallel connection area 1, nickel sheet spiral knot
Structure 2, nickel sheet welding section 3, nickel sheet welding section 3 are welded in battery core 4, and nickel sheet parallel connection area 1 connects several nickel sheet helical structures 2.
Nickel sheet helical structure 2 is connected to nickel sheet parallel connection area 1 by overcurrent load position 5.
5 width of overcurrent load position are most thin.
Required other necessary structures：Nickel sheet parallel connection area 1 and battery core surface formed the value of certain difference in height h, h according to
Actual conditions and change, in order to ensure that helical structure is not contacted with battery core surface.
The nickel sheet structure had stream loading defencive function, and the principle of this function is that resistance heating melts disconnected principle, but this
Function current design must not be less than the battery core connection in series-parallel maximum current limit of itself, therefore nickel sheet structure is constant in groups, but can root
Change the length of nickel sheet thickness and helicoidal structure according to actual requirement to change nickel sheet internal resistance.
During work, as shown in figure 3, being equipped with a nickel sheet structure 6 at each battery core 4, nickel sheet structure 6 passes through battery core
Fixing device 7 is connected with battery core.After wherein internal short-circuit occurs for some single battery core, this battery core becomes the state of conducting immediately,
As the switch of a closure, other N-1 battery cores form current loop, the amplification of short circuit current flow moment, this battery core with this " switch "
It then can persistent fever；
When high current has the function of to melt disconnected nickel sheet by described, and more than after design limit electric current, nickel sheet melt immediately it is disconnected,
Prevent battery core persistent fever from ultimately resulting in thermal runaway and triggering fire behavior.
Claims (5)
1. a kind of nickel sheet structure of lithium battery monomer controlled current flow design, it is characterised in that：Including nickel sheet parallel connection area (1), nickel sheet
Helical structure (2), nickel sheet welding section (3), nickel sheet welding section (3) are welded in battery core (4), and nickel sheet parallel connection area (1) is by several nickel sheet
Helical structure (2) connects.
2. a kind of nickel sheet structure of lithium battery monomer controlled current flow design according to claim 1, it is characterised in that：Nickel sheet
Helical structure (2) is connected to nickel sheet parallel connection area (1) by overcurrent load position (5).
3. a kind of nickel sheet structure of lithium battery monomer controlled current flow design according to claim 2, it is characterised in that：Overcurrent
Load position (5) width is most thin.
4. a kind of nickel sheet structure of lithium battery monomer controlled current flow design according to claim 3, it is characterised in that：Nickel sheet
Area (1) in parallel forms certain difference in height h with battery core surface.
5. a kind of nickel sheet structure of lithium battery monomer controlled current flow design according to claim 4, it is characterised in that：Work as height
Electric current by the nickel sheet structure, and more than after design limit electric current, melt disconnected immediately by nickel sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721398325.5U CN207381467U (en) | 2017-10-26 | 2017-10-26 | The nickel sheet structure of lithium battery monomer controlled current flow design |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721398325.5U CN207381467U (en) | 2017-10-26 | 2017-10-26 | The nickel sheet structure of lithium battery monomer controlled current flow design |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207381467U true CN207381467U (en) | 2018-05-18 |
Family
ID=62336500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721398325.5U Active CN207381467U (en) | 2017-10-26 | 2017-10-26 | The nickel sheet structure of lithium battery monomer controlled current flow design |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207381467U (en) |
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2017
- 2017-10-26 CN CN201721398325.5U patent/CN207381467U/en active Active
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