CN108987657B - Nickel strap for series-parallel connection of batteries - Google Patents
Nickel strap for series-parallel connection of batteries Download PDFInfo
- Publication number
- CN108987657B CN108987657B CN201810601538.6A CN201810601538A CN108987657B CN 108987657 B CN108987657 B CN 108987657B CN 201810601538 A CN201810601538 A CN 201810601538A CN 108987657 B CN108987657 B CN 108987657B
- Authority
- CN
- China
- Prior art keywords
- transverse
- platform
- convex
- nickel
- platforms
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 108
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 54
- 238000009826 distribution Methods 0.000 claims abstract description 3
- 230000035939 shock Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 3
- 238000003466 welding Methods 0.000 description 31
- 210000004027 cell Anatomy 0.000 description 11
- 230000007704 transition Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000000703 anti-shock Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000002699 waste material Substances 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
- H01M50/502—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
- H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
-
- 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 invention discloses a battery serial-parallel nickel strap, which comprises a plurality of transverse nickel plates arranged at intervals, wherein the transverse nickel plates are formed by regular distribution of transverse concave platforms, transverse convex platforms and transverse concave platforms; two adjacent horizontal nickel plates are connected through a longitudinal convex platform; a main shunt groove is formed in the transverse concave platform; two side diversion grooves are arranged on the transverse convex platform at intervals, and the side diversion grooves adjacent to the main diversion groove are communicated with the main diversion groove. The invention has the advantages of simple structure, reasonable design, mature process, flexible use and assembly, high overcurrent load capacity of the nickel strap and good shock resistance.
Description
Technical Field
The invention relates to the technical field of storage batteries, in particular to a nickel strap for series-parallel connection of batteries.
Background
Along with the development of new energy equipment such as electric vehicles, logistics robots and electric ships, the lithium batteries are widely used, the output power and the battery load are larger and larger, the working environment is also more and more severe, and the current carrying capacity and the shock resistance requirements of nickel belts connected in series and parallel on the battery pack are gradually improved. The original nickel plates connected in series and parallel of the battery can not meet the use requirements of new battery modules more and more in terms of overcurrent capacity, shock resistance and spot welding technology.
In the existing battery module, a circular plane, a straight or I-shaped splitter box is adopted for a common nickel plate. The nickel sheet of I-shaped splitter box is used, the route of passing through current on the nickel sheet between the welding heads during spot welding is longer, and is far longer than the distance of overcurrent after the nickel sheet contacts with the battery cell surface, when resistance welding spot welding the nickel sheet is carried out, welding current is smaller, the power requirement of a butt welding machine is slightly lower, the welding current impact on the battery cell is also smaller, the damage to the battery cell is lighter, in addition, a crack-stopping groove is arranged between the welding position of the I-shaped splitter box and the main surface of the nickel sheet, most of energy can be consumed at the welding point by the impact of vibration, and the shock resistance of the nickel sheet and the welding point of the battery cell is indirectly enhanced. However, the i-shaped shunt slot has a disadvantage that the effective thickness of the nickel sheets at the edge of the slot is smaller, when a larger current passes through the slot, the nickel sheets can generate heat seriously, so that the temperature of the electrode surface of the battery cell is increased, and the risk of burning loss is caused.
The I-shaped splitter box is just opposite to the I-shaped splitter box, the splitter box is short in distance and small in area, the condition of large current load of a nickel sheet can be met, but the shock resistance is poor, the spot welding current is large, the requirement on a welding machine is high, and the impact damage to a battery cell during spot welding is large.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the battery serial-parallel nickel strap which is simple in structure, convenient to operate and practical.
The invention is realized by the following modes:
the utility model provides a battery series-parallel connection nickel strap which characterized in that: the nickel plate comprises a plurality of transverse nickel plates which are arranged at intervals, wherein the transverse nickel plates are formed by regular distribution of transverse concave platforms, transverse convex platforms and transverse concave platforms; two adjacent horizontal nickel plates are connected through a longitudinal convex platform; a main shunt groove is formed in the transverse concave platform; two side diversion grooves are arranged on the transverse convex platform at intervals, and the side diversion grooves adjacent to the main diversion groove are communicated with the main diversion groove.
Further, the longitudinal convex platforms are connected with the end parts of the two adjacent transverse concave platforms, and the connection parts of the longitudinal convex platforms and the transverse concave platforms are in arc connection.
Further, the main shunt groove is in a straight shape.
Further, the side shunt grooves are circular, and the diameter of the circular side shunt grooves is larger than the groove width of the main shunt grooves.
Further, the height difference between the transverse concave platform and the transverse convex platform is 0.4-0.8mm.
Further, the surface of the longitudinal convex platform is level with the surface of the transverse convex platform.
Further, the transverse concave platform is rectangular, convex points are formed on the transverse concave platform in a downward concave mode, and the convex points are located on two sides of the main shunt grooves.
Further, the distance between the surface of the convex point and the bottom surface of the transverse concave platform is 0.25-0.5mm.
Further, the longitudinal convex platform is provided with an assembly hole.
Further, one of the longitudinal convex platforms positioned on the outer side extends outwards to form a side fixing plate, and the side fixing plate is provided with a mounting hole.
The invention has the beneficial effects that: simple structure, reasonable design, mature process, flexible assembly, high overcurrent capacity of nickel strap load and good shock resistance.
Drawings
FIG. 1 is a schematic view of a first construction of the present invention;
FIG. 2 is a schematic diagram of a second embodiment of the present invention;
FIG. 3 is a schematic view of the spot welding current trend of the transverse concave platform of the present invention;
FIG. 4 is a schematic view of the current flow of the lateral concave platform of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Examples:
the battery serial-parallel nickel strap comprises a plurality of transverse nickel plates 1 which are arranged at intervals as shown in fig. 1 and 2, wherein the transverse nickel plates 1 are formed by regularly distributing transverse concave platforms 11, transverse convex platforms 12 and transverse concave platforms 11; two adjacent horizontal nickel plates 1 are connected through a longitudinal convex platform 2; the surface of the longitudinal convex platform 2 is level with the surface of the transverse convex platform 12, so that the integrity is good; the transverse concave platform 11 is provided with a straight main diversion channel 13; two side diversion grooves 14 are arranged on the transverse convex platform 12 at intervals, and the side diversion grooves 14 adjacent to the main diversion groove 13 are communicated with the main diversion groove 13; the longitudinal convex platforms 2 are connected with the end parts of two adjacent transverse concave platforms 11, and the connection parts of the longitudinal convex platforms 2 and the transverse concave platforms 11 are in arc connection; the longitudinal convex platforms 2 are provided with the assembly holes 21, one of the longitudinal convex platforms 2 positioned on the outer side extends outwards to form a side fixing piece 22, and the side fixing piece 22 is provided with the assembly holes 23, so that the installation and the positioning are convenient.
In this embodiment, the side branch grooves 14 are circular, and the diameter of the circular side branch groove 14 is larger than the groove width of the main branch groove 13.
In this embodiment, the height difference between the lateral concave land 11 and the lateral convex land 12 is 0.4-0.8mm.
In this embodiment, as shown in fig. 2, the transverse concave platform 11 is rectangular, on which convex points 15 are formed by sinking downwards, and the convex points 15 are located at two sides of the main shunt grooves 13; the distance between the surface of the bump 15 and the bottom surface of the lateral land 11 is 0.25-0.5mm.
In the embodiment, the transverse concave platform 11 contacted with the battery cell is rectangular, so that the material utilization rate of the nickel sheet is higher than that of a round battery cell; the transverse convex platform 12 and the longitudinal convex platform 2 which are formed by bending are designed around the transverse concave platform 11, the position relationship is that the transverse concave platform 11 is positioned below, the height difference between the transverse convex platform 12 and the longitudinal convex platform 2 is slightly higher than that of the transverse concave platform 11, the height difference can be adjusted according to practical conditions, the transverse convex platform 12 and the longitudinal convex platform 2 are generally designed to be 0.4-0.8mm, and when the nickel strap is working in a vibration environment, the bending positions of the two platform height differences play a role in absorbing spring vibration, the stress of spot welding of the nickel strap and the battery cell surface is reduced, and the anti-vibration performance of the nickel strap is improved. In addition, the transverse concave platform 11 is provided with the main flow dividing groove 13 and the side flow dividing groove 14, the diameter of the circular side flow dividing groove 14 is larger than the groove width of the main flow dividing groove 13, the stroke of spot welding current can be slightly increased, as shown in fig. 4, and the anti-cracking and anti-shock reinforcing effects are further achieved. The linear main shunt grooves 13 cut less nickel sheet materials, the nickel strip area is large, and the current overload capacity is greatly improved; in addition, the assembly holes 21 can be arranged on the longitudinal convex platform 2 of the nickel strap and matched with the positioning columns on the battery cell bracket to form shaft holes, so that the assembly spot welding precision of the nickel strap is ensured.
In this embodiment, as shown in fig. 2, a small protruding point 15 is punched downwards at the position of the transverse concave platform 11 by using a die, and a height difference of about 0.25-0.5mm, preferably 0.4mm, exists between the protruding point 15 and the transverse concave platform 11, so that the advantage of the design is that during spot welding, the nickel strap is in surface contact with the end face of the battery core, the welding needle is pressed into a tightly-pressed welding point, but the spot welding plane around the nickel strap is in a contact and non-contact transition area with the end face of the battery core, and during spot welding, part of current required to flow through the welding point for welding is consumed in the transition area, so that energy waste is caused, the load of the welding machine is increased, and the welding point can be seriously caused; after the convex point 15 is formed on the spot welding plane, the transition area of the transverse concave platform 11 and the end face of the battery cell is completely separated, and spot welding current completely flows through the contact surface of the convex point 15, as shown in fig. 3, the spot welding efficiency is high, the welding effect is good, the strength is high, the current carrying capacity is high, and the electric tool is particularly suitable for electric tool products with severe vibration environments and large impact current.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present invention.
Claims (9)
1. The utility model provides a battery series-parallel connection nickel strap which characterized in that: the nickel plate comprises a plurality of transverse nickel plates (1) which are arranged at intervals, wherein the transverse nickel plates (1) are formed by regular distribution of transverse concave platforms (11), transverse convex platforms (12) and transverse concave platforms (11); two adjacent transverse nickel plates (1) are connected through a longitudinal convex platform (2); a main shunt groove (13) is formed in the transverse concave platform (11); two side diversion grooves (14) are formed in the transverse convex platform (12) at intervals, and the adjacent side diversion grooves (14) of the main diversion groove (13) are communicated with the main diversion groove (13); the longitudinal convex platforms (2) are connected with the end parts of two adjacent transverse concave platforms (11); the surface of the longitudinal convex platform (2) is level with the surface of the transverse convex platform (12); the transverse convex platform (12) and the longitudinal convex platform (2) are higher than the transverse concave platform (11); the height difference between the transverse concave platform (11) and the transverse convex platform (12) is 0.4-0.8mm.
2. The battery string and parallel nickel strap of claim 1, wherein: the connection part of the longitudinal convex platform (2) and the transverse concave platform (11) is in arc connection.
3. The battery string and parallel nickel strap of claim 1, wherein: the main shunt grooves (13) are in a straight shape.
4. A battery string and parallel nickel strap according to claim 3, wherein: the side diversion grooves (14) are round, and the diameter of the round side diversion grooves (14) is larger than the groove width of the main diversion groove (13).
5. The battery string and parallel nickel strap of claim 2, wherein: the surface of the longitudinal convex platform (2) is level with the surface of the transverse convex platform (12).
6. The battery string and parallel nickel strap of claim 1, wherein: the transverse concave platform (11) is rectangular, convex points (15) are formed on the transverse concave platform in a downward concave mode, and the convex points (15) are located on two sides of the main shunt grooves (13).
7. The battery string and parallel nickel strap of claim 6, wherein: the distance between the surface of the convex point (15) and the bottom surface of the transverse concave platform (11) is 0.25-0.5mm.
8. The battery string and parallel nickel strap of claim 1, wherein: and the longitudinal convex platform (2) is provided with an assembly hole (21).
9. The battery string and parallel nickel strap of claim 1, wherein: one of the longitudinal convex platforms (2) positioned on the outer side extends outwards to form a side fixing piece (22), and the side fixing piece (22) is provided with a mounting hole (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810601538.6A CN108987657B (en) | 2018-06-12 | 2018-06-12 | Nickel strap for series-parallel connection of batteries |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810601538.6A CN108987657B (en) | 2018-06-12 | 2018-06-12 | Nickel strap for series-parallel connection of batteries |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108987657A CN108987657A (en) | 2018-12-11 |
| CN108987657B true CN108987657B (en) | 2024-03-19 |
Family
ID=64541139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810601538.6A Active CN108987657B (en) | 2018-06-12 | 2018-06-12 | Nickel strap for series-parallel connection of batteries |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108987657B (en) |
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| KR101053208B1 (en) * | 2010-02-09 | 2011-08-01 | 주식회사 엘지화학 | Battery module of improved welding reliability and battery pack employed with the same |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN108987657A (en) | 2018-12-11 |
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