CN211238368U - Electricity core connecting piece and battery module - Google Patents
Electricity core connecting piece and battery module Download PDFInfo
- Publication number
- CN211238368U CN211238368U CN201922131456.2U CN201922131456U CN211238368U CN 211238368 U CN211238368 U CN 211238368U CN 201922131456 U CN201922131456 U CN 201922131456U CN 211238368 U CN211238368 U CN 211238368U
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- connecting portion
- positioning hole
- connecting piece
- transition portion
- groove
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- 230000005611 electricity Effects 0.000 title claims abstract description 9
- 230000007704 transition Effects 0.000 claims abstract description 34
- 208000037656 Respiratory Sounds Diseases 0.000 abstract description 4
- 238000003466 welding Methods 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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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
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Abstract
The utility model discloses an electricity core connecting piece and battery module, electricity core connecting piece include first connecting portion, second connecting portion and transition portion, the both ends of transition portion respectively with first connecting portion the second connecting portion are connected, transition portion includes two at least domes, and is a plurality of the dome end to end connects, adjacent two dome's protruding opposite direction. The utility model discloses a transition portion of electric core connecting piece is through setting up two at least domes to make two adjacent domes arch in the opposite direction protruding, reduced bellied height, the fluctuation of transition portion is comparatively gentle, makes electric core connecting piece have higher structural strength, and transition portion is difficult to take place stress concentration, therefore electric core connecting piece is difficult for producing crackle or breaking occur under the condition that receives vibrations or impact, and the reliability is high.
Description
Technical Field
The utility model relates to a battery manufacturing technology field especially relates to an electricity core connecting piece and battery module.
Background
Be provided with a plurality of electric cores in the battery module, realize the series-parallel connection through electric core connecting piece between electric core, because electric core can take place the inflation of certain degree at the circulation in-process, electric core connecting piece on the present market mostly can set up an arch bridge shape structure, and the purpose of arch bridge shape structure is in order to absorb the displacement change that electric core circulation in-process brought. The arch bridge shape structure often adopts the mode of mould punching press to go on in the manufacturing process, and the material can reduce on thickness direction, takes place stress concentration easily in arch bridge shape structure department to cause intensity not enough, lead to electric core connecting piece risk such as fracture easily to take place in the vibration process.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an electricity core connecting piece, it has high structural strength and high reliability.
Another object of the present invention is to provide a battery module, the reliability of which is high.
To achieve the purpose, the utility model adopts the following technical proposal:
on the one hand, provide a battery core connecting piece, including first connecting portion, second connecting portion and transition portion, the both ends of transition portion respectively with first connecting portion the second connecting portion are connected, transition portion includes two at least domes, and is a plurality of the dome end to end connects, adjacent two dome's protruding opposite direction.
As a preferred embodiment of the present invention, the side surface of the transition portion is sinusoidal.
As a preferred scheme of the utility model, run through on the first connecting portion and seted up first locating hole, run through on the second connecting portion and seted up the second locating hole, electric core connecting piece about first locating hole with line symmetry between the second locating hole.
As an optimized scheme of the utility model, first connecting portion with the second connecting portion are kept away from the marginal shape of transition portion one end is circular arc or elliptical arc.
As a preferred embodiment of the present invention, the first positioning hole and the second positioning hole are disposed at the circle center positions corresponding to the circular arcs;
or the first positioning hole and the second positioning hole are arranged at the focus positions corresponding to the elliptical arcs.
As a preferred scheme of the utility model, first recess has been seted up along self thickness direction on the first connecting portion, first recess with first locating hole intercommunication, the second recess has been seted up along self thickness direction on the second connecting portion, the second recess with second locating hole intercommunication.
As a preferred scheme of the utility model, first recess with the second recess is circular recess or elliptical groove, first locating hole is located the tank bottom center of first recess, the second locating hole is located the tank bottom center of second recess.
As a preferred embodiment of the present invention, the first connecting portion, the second connecting portion and the transition portion have the same thickness.
On the other hand, a battery module is provided, which comprises a plurality of battery cores, wherein the battery cores are connected by the battery core connecting piece in any one of the technical schemes.
As a preferred scheme of the utility model, first connecting portion the second connecting portion with the utmost point post welding of electricity core.
The utility model has the advantages that:
the utility model discloses a transition portion of electric core connecting piece is through setting up two at least domes to make two adjacent domes arch in the opposite direction protruding, reduced bellied height, the fluctuation of transition portion is comparatively gentle, makes electric core connecting piece have higher structural strength, and transition portion is difficult to take place stress concentration, therefore electric core connecting piece is difficult for producing crackle or breaking occur under the condition that receives vibrations or impact, and the reliability is high.
Drawings
Fig. 1 is a schematic perspective view of a cell connecting member according to an embodiment of the present invention;
FIG. 2 is a top view of FIG. 1;
fig. 3 is a sectional view taken along line a-a of fig. 2.
In FIGS. 1-3:
1. a first connection portion; 11. a first positioning hole; 12. a first groove; 2. a second connecting portion; 21. a second positioning hole; 22. a second groove; 3. a transition section; 31. a first dome; 32. a second dome.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the word "over" a first feature or feature in a second feature may include the word "over" or "over" the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under" a second feature may include a first feature that is directly under and obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
As shown in fig. 1, the electric core connecting piece of this embodiment includes first connecting portion 1, second connecting portion 2 and transition portion 3, and the both ends of transition portion 3 are connected with first connecting portion 1, second connecting portion 2 respectively, and transition portion 3 includes two at least domes, and a plurality of domes end to end connection, two adjacent domes's protruding opposite direction.
Conventional electricity core connecting piece is owing to only be provided with an domes, and in order to guarantee to have sufficient deformation volume, its domes are protruding comparatively precipitously, and great degree buckling can take place for domes's top and edge, easily takes place stress concentration in the department of buckling to produce crackle or breaking.
The transition portion 3 of the electric core connecting piece of this embodiment is through setting up two at least domes to make two adjacent domes arch in the opposite direction protruding, reduced bellied height, the fluctuation of transition portion 3 is comparatively gentle, makes electric core connecting piece have higher structural strength, and transition portion 3 is difficult to take place stress concentration, therefore electric core connecting piece is difficult for producing the crackle or breaking occur under the condition that receives vibrations or impact, and the reliability is high.
As shown in fig. 3, preferably, there are two arches, a first arch 31 and a second arch 32, respectively, and the side of the transition portion 3 is sinusoidal. The processing difficulty of two arch structures is little, makes the electric core connecting piece of this embodiment have lower cost.
Further, the sine curve corresponds to a sine function of f (x) ± asin (x), 0< a < 1. A is the amplitude of the sine function, the larger the value of A, the larger the fluctuation of the function, and the closer the value of A to 0, the smaller the fluctuation of the function. When a is 0, (x) is 0, the corresponding transition portion 3 becomes a flat plate with no undulation. Therefore, the value a should not be too large, the first arch 31 and the second arch 32 are protruded in opposite directions, one of the arches necessarily faces to the cell side, and the too large value a would cause the cell to contact or interfere with the arches, preventing the cell connector from being normally installed. In addition, when the first or second arch structure 31 or 32 is too steep, the degree of bending of the connection portion between the first or second connection portion 1 or 2 and the transition portion 3 is also large, and stress concentration is likely to occur, which may cause cracks or fractures.
Preferably, the first connecting portion 1 is provided with a first positioning hole 11 in a penetrating manner, the second connecting portion 2 is provided with a second positioning hole 21 in a penetrating manner, and the cell connectors are symmetrical with respect to a connecting line between the first positioning hole 11 and the second positioning hole 21. The first positioning hole 11 and the second positioning hole 21 are used for accurately positioning the cell connecting portion on the cell to improve the welding precision. The battery cell connecting piece is a volume conductor with a certain thickness, current flows to the other positioning hole from one positioning hole, and the battery cell connecting piece is symmetrical about the connecting line of the first positioning hole 11 and the second positioning hole 21, so that the difference of the internal current at each position is small, the difference of heat generated by each part is small, and local high-temperature points are not easy to generate.
Further, the edge shapes of the first connecting part 1 and the second connecting part 2 at the ends far away from the transition part 3 are both circular arcs or elliptical arcs. The edge of the circular arc or the elliptical arc enables the difference between the current at the edge of the battery core connecting piece and the current at the center of the battery core connecting piece to be small, so that the temperature difference at each position of the battery core connecting piece is reduced, temperature control is facilitated, and the temperature rise at each position of the battery core connecting piece tends to be consistent.
Further, the first positioning hole 11 and the second positioning hole 21 are formed in the circle center positions corresponding to the circular arcs; or, the first positioning hole 11 and the second positioning hole 21 are opened at the focus positions corresponding to the elliptical arcs. Therefore, the battery cell connecting piece keeps symmetry, and the difference of the current at each position is reduced.
As shown in fig. 2, further, the first connecting portion 1 is provided with a first groove 12 along its thickness direction, the first groove 12 is communicated with the first positioning hole 11, the second connecting portion 2 is provided with a second groove 22 along its thickness direction, and the second groove 22 is communicated with the second positioning hole 21. Cell connecting piece and electric core adopt laser welding usually, and the required power of welding degree of difficulty and laser welding has directly been influenced at the thickness of welding department to first connecting portion 1 and second connecting portion 2, and powerful laser instrument is with higher costs, and first recess 12 and second recess 22 have reduced the thickness of welding department to welded cost and degree of difficulty have been reduced, and groove structure still provides the guide for the welding position, make the laser instrument more easily accurate discernment welding point.
Further, the first groove 12 and the second groove 22 are both circular grooves or elliptical grooves, the first positioning hole 11 is located at the center of the bottom of the first groove 12, and the second positioning hole 21 is located at the center of the bottom of the second groove 22. Thereby make first recess 12 and second recess 22 be located the middle part of first connecting portion 1 and second connecting portion 2 respectively, make welded degree of accuracy and fastness effectively ensured. In addition, the light spot generated by the laser used in welding is also generally circular, the circular groove is more easily matched with the light spot of the laser, and the welding effect is better.
Preferably, the thicknesses of the first connecting portion 1, the second connecting portion 2 and the transition portion 3 are the same, so that the internal resistance difference at each position of the cell connecting piece of the embodiment is small, and the temperature difference at each position is small. The transition part 3 with smooth fluctuation ensures that the processing difficulty is lower and the consistency of the thickness is easy to realize.
The embodiment of the utility model provides a battery module is still provided, including a plurality of electric cores, a plurality of electric cores are connected by the electric core connecting piece of above-mentioned arbitrary embodiment to make battery module have higher reliability.
Further, the first connecting portion 1 and the second connecting portion 2 are welded to the pole of the battery cell. Because the electric core that contains in the module is more, welded connection's mode is more simple, is favorable to improving production efficiency.
As a preferred embodiment of the present invention, in the description of the present specification, reference to the description of the terms "preferred", "optional", and the like, means that a particular feature, structure, material, or characteristic described in connection with the example or illustration is included in at least one example or illustration of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above embodiments are only used to illustrate the detailed embodiments of the present invention, and the present invention is not limited to the above detailed embodiments, i.e. the present invention must not be implemented depending on the detailed embodiments. It should be clear to those skilled in the art that any improvement of the present invention, to the equivalent replacement of each raw material of the present invention, the addition of auxiliary components, the selection of specific modes, etc., all fall within the protection scope and disclosure scope of the present invention.
Claims (10)
1. The utility model provides an electricity core connecting piece, its characterized in that includes first connecting portion, second connecting portion and transition portion, the both ends of transition portion respectively with first connecting portion the second connecting portion are connected, transition portion includes two at least domes, and is a plurality of the dome end to end connects, adjacent two dome's protruding opposite direction.
2. The cell connector of claim 1, wherein the sides of the transition portion are sinusoidal.
3. The cell connector of claim 1, wherein a first positioning hole extends through the first connecting portion, a second positioning hole extends through the second connecting portion, and the cell connector is symmetrical about a line between the first positioning hole and the second positioning hole.
4. The cell connecting piece according to claim 3, wherein the first connecting portion and the second connecting portion are both arc-shaped or elliptical-shaped at the end away from the transition portion.
5. The cell connecting piece according to claim 4, wherein the first positioning hole and the second positioning hole are formed in the positions of the centers of circles corresponding to the arcs;
or the first positioning hole and the second positioning hole are arranged at the focus positions corresponding to the elliptical arcs.
6. The cell connecting member of claim 5, wherein the first connecting portion has a first groove formed thereon along a thickness direction thereof, the first groove being in communication with the first positioning hole, the second connecting portion has a second groove formed thereon along a thickness direction thereof, the second groove being in communication with the second positioning hole.
7. The cell connector of claim 6, wherein the first and second grooves are both circular or elliptical grooves, the first positioning hole is located at the center of the bottom of the first groove, and the second positioning hole is located at the center of the bottom of the second groove.
8. The cell connector of claim 1, wherein the first connection portion, the second connection portion, and the transition portion are all the same thickness.
9. A battery module comprising a plurality of cells, wherein a plurality of the cells are connected by the cell connector of any of claims 1-8.
10. The battery module according to claim 9, wherein the first connecting portion and the second connecting portion are welded to a pole of the battery core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922131456.2U CN211238368U (en) | 2019-11-29 | 2019-11-29 | Electricity core connecting piece and battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922131456.2U CN211238368U (en) | 2019-11-29 | 2019-11-29 | Electricity core connecting piece and battery module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211238368U true CN211238368U (en) | 2020-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922131456.2U Active CN211238368U (en) | 2019-11-29 | 2019-11-29 | Electricity core connecting piece and battery module |
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| Country | Link |
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| CN (1) | CN211238368U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115064828A (en) * | 2022-05-27 | 2022-09-16 | 孚能科技(赣州)股份有限公司 | Electricity core connecting piece and battery module |
| CN115133233A (en) * | 2022-05-27 | 2022-09-30 | 孚能科技(赣州)股份有限公司 | Battery cell pole, battery cell and battery module |
-
2019
- 2019-11-29 CN CN201922131456.2U patent/CN211238368U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115064828A (en) * | 2022-05-27 | 2022-09-16 | 孚能科技(赣州)股份有限公司 | Electricity core connecting piece and battery module |
| CN115133233A (en) * | 2022-05-27 | 2022-09-30 | 孚能科技(赣州)股份有限公司 | Battery cell pole, battery cell and battery module |
| CN115133233B (en) * | 2022-05-27 | 2023-09-08 | 孚能科技(赣州)股份有限公司 | Battery core pole column, battery core and battery module |
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