CN104600236B - A kind of Li-ion batteries piles - Google Patents
A kind of Li-ion batteries piles Download PDFInfo
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- CN104600236B CN104600236B CN201510036431.8A CN201510036431A CN104600236B CN 104600236 B CN104600236 B CN 104600236B CN 201510036431 A CN201510036431 A CN 201510036431A CN 104600236 B CN104600236 B CN 104600236B
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- 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
- H01M50/531—Electrode connections inside a battery casing
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- 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
- H01M50/30—Arrangements for facilitating escape of gases
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- 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
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/383—Flame arresting or ignition-preventing means
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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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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
A kind of Li-ion batteries piles, including a plurality of group of battery modules, it is connected respectively by high current connection sheet between group of battery modules battery core positive pole, between negative pole, high current connection sheet includes the I-shaped nickel sheet for being provided with the in-line copper sheet of row's circular port and being welded between two adjacent circular holes；Multiple line ball holes and corresponding connection wire core are set on connection terminal between group of battery modules, the two is closely connected by the way of welding crimping welding；The insulation board for being arranged on group of battery modules battery core both positive and negative polarity two is the bakelite plate for being provided with a plurality of circular holes, and it is provided with heat conduction explosion-proof isolation piece towards the one side of battery core both positive and negative polarity；The problem of circuit generates heat when the present invention solves high current charge-discharge, add the contact area between connection terminal and wire rod, reduce connection temperature, insulation board and heat conduction explosion-proof isolation piece can avoid battery explosion on fire in battery operation irregularity with pressure release, battery pack of the present invention is safe and reliable, and service life is long.
Description
Technical field
The present invention relates to cell art, and in particular to a kind of Li-ion batteries piles.
Background technology
Existing high current Li-ion batteries piles, generally include a plurality of group of battery modules synthesized by group of battery modules, often
A plurality of battery cores of individual group of battery modules are connected in parallel by connection sheet, pass through connection terminal, connecting line between group of battery modules
It is connected in series, battery pack battery core both positive and negative polarity both sides is provided with insulation board.Battery module, the group of battery modules both positive and negative polarity of battery pack
Between series, parallel connection be resistance welded using sheet metal jag, to ensure connection sheet fastness, usual sheet metal all compared with
Thickness, thickness reaches more than 0.4mm, in order to ensure weld strength, is both needed to that using the big energy of high-power welding machine output jail could be welded
Gu, the big solder side of welding machine output energy produces more heat, may damage battery core, causes certain potential safety hazard, therefore
The corresponding solder side of battery also needs thicker metal level, i.e., the welding one side of single battery core shell, which need to increase thickness of shell, (for example to be had
When need to increase more than 1.0mm), which adds the weight of single battery core, because battery pack is more simultaneously using series connection more than single battery core
The mode of connection is assembled, therefore the weight of battery is consequently increased, and the metal level of thickening occupies effective chemical analysis of battery
Space, so that the available capacity of the battery under reducing same volume, also reduces the energy density of battery pack, because of metal
Density is much larger compared with the density of the chemical analysis in battery, therefore the battery of same volume also increases simultaneously because outer cover metal thickeies
The weight of battery；It is the alloy such as nickel sheet or nickel alloy to connect sheet metal, because its resistance value is larger, thus super-high-current ability compared with
Difference, while because sheet metal is to be covered in battery connection surface, the sheet metal of this connection has blocked electricity when inside battery is abnormal
The phenomenons such as blast may occur for pond relief valve, battery.
Meanwhile, existing high current Li-ion batteries piles connection terminal is with connecting line generally using the straight of one line of a terminal
The mode for connecing welding or directly crimping is connected.The mode directly crimped is that will connect in the connection terminal that the end of a thread is insert molded, so
External application punching press die stamping again afterwards, makes the connected mode being physically contacted after connection terminal stress deformation with connecting line.Such a crimping
Mode is because wire rod metal core is round, and single core all can be in various degree after extruding by physical damnification, causes core strong
Degree weakens significantly, the influence that the mechanical tensile forces intensity of whole connection terminal is also under pressure with core tension intensity itself.It is different
Although being squeezed between core between deformation, core still has a fixed gap, long-term use is easier to oxidation, terminal oxidation
After directly contribute contact resistance and become big, caloric value increases during overcurrent, and overcurrent capability and tension intensity are greatly reduced therewith, because
The mode service life that this is directly crimped is shorter.Also a kind of mode directly welded, it is typically that wire rod and sheet metal are direct
Connected with soldering mode, such a connected mode is because the intensity of tin is with respect to the weak many of copper metal, while because sheet metal is only leaned on wire rod
Tin parcel connection, the tension intensity of whole terminal also can be much smaller.For connecting line, because tin is oxidizable in atmosphere,
By the way of one line of a terminal, wire rod can be slightly thick during super-high-current, and wire rod is easily damaged in bending, when folding force is larger
Two battery stress of connection can also be made, so as to influence overall performance.In addition, the connected mode of one line of a terminal, always connects
Mode of the contacting surface product also than multi-thread many line ball holes is much smaller, under conditions of identical line footpath, and a line is than line that a plurality of line is added up
Caloric value is more more concentrated greatly when footpath is identical, and temperature is higher during overcurrent, so as to greatly shorten the service life of battery.Because of above-mentioned original
Cause, using the connected mode of one line of a terminal, either individually crimping or individually welding, requirement is not suitable for
The outdoor equipment of long-term use is used with the connection of lithium battery.
Further, six faces of single battery module group are generally encapsulated as with shell in existing high current Li-ion batteries piles
One, the battery core and external insulation for making group of battery modules insulate, and this shell plays a part of insulating and fixed multiple battery modules,
Material used in shell is usually plastics, and heat during normal battery operation is difficult to scatter, and need to increase the side such as air-cooled or water cooling in addition
The heat abstractor of formula, the weight of battery will be increased by increasing these devices, increase the fault rate of battery.Because of electricity when battery is normally used
Pond is encapsulated in the plastic, and the bad battery temperature that directly results in that radiates is raised, and is largely effected on battery, is increased plant maintenance
Cost and use cost.Because of non air exit hole when battery is abnormal, battery radiating is bad, and battery temperature rise, which will result directly in battery, to be made
With reduced lifetime, battery is also likely on fire from explosion because of high temperature, damages equipment and causes fire.
The content of the invention
It is an object of the invention to provide a kind of Li-ion batteries piles, its connection sheet can strengthen bonding strength, increase
The ability of electric current, solves the heating problem of heavy-current discharge, improves the battery under battery pack power density and battery abnormal conditions
The safety dumping of air pressure inside, strengthens the global reliability and safety issue of battery.
Meanwhile, for defect present in prior art, it is a further object of the present invention to provide a kind of lithium ion battery is big
Current connection terminal, bonding strength, toughness and contact area that can be between splicing thread and terminal reduce contact resistance value and heating
Amount, so as to improve overall overcurrent capability, and it has rational in infrastructure, and security is good, convenient and reliable, service life length it is excellent
Point.
Another object of the present invention is to design a kind of cellular type insulation board of high capacity lithium ion battery group, with solution
State the bad, battery of radiating it is abnormal when the problem of be unable to pressure release and occur on fire from explosion.
Technical scheme is as follows：
A kind of Li-ion batteries piles, including a plurality of group of battery modules, a plurality of battery cores of each group of battery modules pass through
Connection sheet is connected in parallel, and is connected in series between group of battery modules by connection terminal, connecting line, in battery pack battery core both positive and negative polarity two
Side is provided with insulation board, it is characterised in that described each group of battery modules is often led to respectively between row battery core positive pole, between negative pole
Super-high-current connection sheet is connected, and realizes that often row battery core is connected in parallel, described high current connection sheet, including copper sheet and nickel
Piece, described copper sheet is the in-line copper sheet for having row's circular port, and the center of circle of circular port is against the center of group of battery modules battery core
Line, pore size is adapted with battery core relief valve size, and the number of openings is corresponding with battery core quantity, described nickel sheet in I-shaped,
Two is triangle or semicircle, and centre is in-line, and the length of nickel sheet is less than the distance of center circle of copper sheet circular port, adjacent two nickel sheet
Between have a space, the center line in space is overlapped with the center line of battery core, and two adjacent circles of copper sheet are welded in the middle part of nickel sheet
Between shape hole, the end of nickel sheet is welded on the weld on the battery core negative or positive electrode surface in circular port；
Further, the space between described adjacent two nickel sheet is 0.9~1.1mm；
Further, between each row battery core positive pole of described group of battery modules the high current connection sheet, connected between negative pole
End interconnected respectively by a copper bar 15, realize being connected in parallel for each row battery core of group of battery modules；
The profile of nickel sheet 6 of the present invention is in I-shaped, and I-shaped both sides up and down are triangular in shape, triangle area than I-shaped in the middle of
The big many of in-line area, so broaden the sectional area of electric current, also reduce the resistance value for the circuit that electric current flows through, subtract
Small circuit loss, has directly converted electric energy to heat energy during current flowing resistance, the loss for reducing circuit electric energy is also reduced by
The caloric value of circuit, the caloric value for reducing battery pack also reduces the temperature of battery pack, adds the use of battery pack
Life-span；Nickel sheet welds together with copper sheet, and the copper sheet resistivity of overcurrent is smaller, and circuit caloric value is minimum during battery charging and discharging,
The overcurrent capability of battery is improved, the problem of circuit generates heat when solving battery high current charge-discharge, so as to improve battery
Reliability, add the service life of battery, reduce the use cost of battery, while being also beneficial to environmental protection；Battery
Circular port on relief valve and copper sheet serves the effect of internal pressure relief when battery occurs abnormal jointly, enhances the safety of battery
Performance, while being also the weld that battery is welded with metal nickel sheet；The welding position of nickel sheet and copper sheet is the in-line portion of nickel sheet
Divide the middle part overlapping with copper sheet, realize the effect of simple and reliable process welding.Using above-mentioned nickel sheet-copper sheet series and parallel connection
Group of battery modules, the Li-ion batteries piles of composition, with lightweight, available capacity is big, conveyance capacity is strong, safe and reliable etc. excellent
Point.
On the basis of such scheme, described connection terminal is L-shaped, including orthogonal terminal board and side plate, end
Daughter board top, which has, fixing hole on multiple line ball holes arranged in parallel, side plate, fixing hole is vertical with the direction of line ball centerline hole；
Described connecting line is rope-lay strand, and its core is divided into a plurality of, and quantity is corresponding with the quantity of line ball hole, connection terminal and connecting line
Between closely connected；
Further, each described line ball hole is made up of a pair of fixed parts, is core crimping in the middle of each pair fixed part
Hole, circular or square, the described connection terminal that is shaped as of described line ball hole is copper tip；
Further, the quantity of described line ball hole 33 is two or three, and described line ball hole is used with being connected core
The mode of welding-crimping-welding is closely connected；
The beneficial effect of such scheme is：
1st, connected mode employs welding-crimping-welding and is combined, and adds the bonding strength of connection terminal and wire rod,
Reduce contact resistance value and caloric value, be integrally improved switching performance, maintenance cost is low, and service life is long；
2nd, the connected mode of same terminal is multi-thread many line ball holes, adds the contact area of connection terminal and wire rod, has
Caloric value during effect control super-high-current, reduction connection temperature, so as to further lift the reliability of connection；
3rd, line ball hole and fixing hole vertical design on connection terminal, can avoid the flexural deformation of wire rod, and reduction loss is carried
High wire rod service life；
It can be seen that, the present invention particularly passes through situation when being connected for electrokinetic cell circuit in lithium ion battery high current
Under, reasonable in design enhances bonding strength, toughness and the contact area between line and terminal, reduces contact resistance value and hair
Heat, so as to improve overall overcurrent capability, with that permanently effective can use, maintenance cost is low, security performance and mechanicalness
Can be high, convenient and reliable, the advantages of service life is long.
On the basis of such scheme, described insulation board is the bakelite plate for being provided with a plurality of circular holes, each center of circular hole
Line is overlapped with the center line of relative battery core, and circular hole size is adapted with battery core pressure relief valve diameter, quantity and the battery mould of circular hole
The quantity of block group battery core is identical, and the one side of insulation board towards battery core positive and negative electrode is provided with heat conduction explosion-proof isolation piece, and heat conduction is explosion-proof absolutely
The ventilative body opening of micro- shape is provided with embolium；
Further, the explosion-proof embolium of described heat conduction is three layers of integral insulating trip that PP-PE-PP is made, the coating of its surface
Heat-conducting silicone grease and gel, described pore size is 0.03~0.2um, and perforated area accounts for the 40% of the gross area, the explosion-proof edge of heat conduction
The fusing point of piece is 130~150 degrees Celsius；
Further, described heat conduction explosion-proof isolation piece is integrally formed with insulation board pressing；
Further, described heat conduction explosion-proof isolation piece is integrally formed with insulation board pressing；
The beneficial effect of such scheme is while the insulation of battery, radiating and pressure release are solved the problems, such as, when battery pack is normal
Insulating heat-conductive plate plays insulation and conductive force during work, and when abnormal high temperature occurs in battery, insulating heat-conductive sector-meeting is heated,
Expose pressure release circular hole, battery is carried out pressure release to prevent battery explosion, effectively reduce the probability that blast on fire occurs in battery.
The present invention solves the bad problem of radiating of dynamical lithium-ion battery packs in the prior art, during battery operation irregularity can with pressure release from
And avoid battery explosion on fire, and it is simple in construction, cost is low, easily implements.
Brief description of the drawings
The present invention has drawings described below：
Fig. 1 Li-ion batteries piles structural representations
Fig. 2 copper sheet front schematic views
Fig. 3 copper sheet side schematic views
Fig. 4 nickel sheet schematic diagrames
Fig. 5 copper sheets and the schematic diagram after nickel sheet welding
Schematic diagram after Fig. 6 copper sheets, nickel sheet and the welding of group of battery modules battery core
The schematic diagram of Fig. 7 7.a, 7.b, 7.c connection terminal 3
The schematic diagram of Fig. 8 connecting lines 4
Fig. 9 connection terminals 3 and the connection effect figure of connecting line 4
The connection procedure schematic diagram of Figure 10 10.a, 10.b, 10.c, 10.d welding-crimping-welding
Figure 11 is insulation board schematic diagram.
Figure 12 is heat conduction explosion-proof isolation piece schematic diagram.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is Li-ion batteries piles structural representation, as one embodiment of the present of invention, and the capacity of lithium battery group can be with
For 120V/300Ah, discharge current can continue for 100A, maximum discharge current 300A60 seconds, battery core diameter 18.5mm.
The Li-ion batteries piles of the present invention, include multiple group of battery modules 12 of series, parallel connection, described battery mould
By multirow, battery core is constituted block group side by side, often passes through above-mentioned high current connection sheet 16 between row battery core positive pole, between negative pole respectively
It is connected, i.e., is often linked together, realized by a nickel sheet-copper sheet of the invention respectively between the positive pole and negative pole of row's battery core
Often row battery core is connected in parallel；Between each each row battery core positive pole of group of battery modules, the nickel sheet of the invention that is connected between negative pole-
The end of copper sheet high current connection sheet is also required to be mutually coupled respectively together, due to group of battery modules each row battery core altogether
Electric current is larger, thus the present invention using the less copper bar of resistance or copper coin thick copper lines 15 by each row battery core positive pole of group of battery modules it
Between, the end of high current connection sheet that is connected between negative pole interconnected respectively, realize each row battery core of group of battery modules
It is connected in parallel.
Fig. 2, Fig. 3 are copper sheet front of the invention, side schematic view.Copper sheet 5 is in yi word pattern, copper sheet width and battery core 7
Diameter is adapted, and row's circular port 13 is provided with copper sheet 5, and its end can be provided with a wiring hole 14.The center of circle pair of circular port 13
The center line of battery core 7, pore size is adapted with battery relief valve size, slightly larger than the diameter of battery relief valve.Make
For a kind of embodiment, for a diameter of 10mm of relief valve battery core, the aperture of circular port 13 can elect 11mm as；The number of openings
The quantity that battery core is often arranged with group of battery modules is corresponding.
Fig. 4 is nickel sheet schematic diagram.Nickel sheet 6 is substantially in I-shaped, two, two triangle or semicircle, the size of triangle
It is slightly less than the size of circular port 13 on copper sheet 5, nickel sheet end profile line can also be approximate elliptic curve, and centre is a word
Shape.Two triangle nickel sheet are located in hole 13, are welded on battery core positive electrode surface or negative terminal surface weld in hole.Nickel sheet and copper
The welding position of piece is the in-line part of the nickel sheet middle part overlapping with copper sheet.There is a space between adjacent two nickel sheet, space
Center line is overlapped with the center line of battery.As a kind of example, the width of yi word pattern part is 4mm, and the length of nickel sheet is slightly less than
The distance of center circle of copper sheet circular port, for example, to be chosen as nickel sheet in the distance between two circular holes 13 of copper sheet -1mm, this example long for length
Spend for 20.2mm.
Fig. 5 is the schematic diagram after copper sheet is welded with nickel sheet.Between the circular hole that nickel sheet 6 is welded on to copper sheet 5 one by one, specific side
Method is：First by the surface laser pulse deoxidation film cleaning treatment of copper sheet 5, then by the middle part of the in-line part of metal nickel sheet 6 and copper
Piece 5 is welded, and welding manner can select the mode such as electric resistance welding or laser welding.About 1mm can be spaced between two connection nickel sheet, for example
0.9-1.1mm can be spaced, so favourable increase welding fastness.Nickel sheet thickness of the present invention is only 0.15mm, and the thickness of copper sheet is
1.0mm, not only improves the welding of battery core, there is good overcurrent capability again.
Fig. 6 is the schematic diagram after copper sheet-nickel sheet is welded with group of battery modules battery core.Battery core 7 is first assembled into lithium-ion electric
In the group module of pond, copper sheet 5 is welded after I-shaped nickel sheet 6, and the one side for welding nickel sheet 6 is loaded into frock clamp makes copper sheet 5 circular
The center line of hole 13 aligns with the center line of battery core 7, then by the triangle exposed in copper sheet circular port 13 or semicircle nickel sheet, with nickel sheet
The negative or positive electrode metal solder side of lower surface battery core welds together, and can be resistance welded according to battery core characteristic or Laser Welding.
The profile of nickel sheet 6 that the present invention is provided slightly is in I-shaped, and I-shaped both sides up and down are triangular in shape, and triangle area compares work
The big many of in-line area in the middle of word, so broadens the sectional area of electric current, also reduces the electricity for the circuit that electric current flows through
Resistance, reduces circuit loss, and heat energy has directly been converted electric energy to during current flowing resistance, reduces the loss of circuit electric energy
The caloric value of circuit is reduced by, the caloric value for reducing battery pack also reduces the temperature of battery pack, adds battery pack
Service life.The end spacing of two adjacent nickel sheet is 0.9-1.1mm, edge and the battery core relief valve pair of the I-shaped part of nickel sheet
Together, when battery occurs abnormal, inner pressure of battery can be by the outside pressure release of circular port 13 of battery relief valve and copper sheet.
Copper sheet length of the present invention, width and thickness are with battery core size and need overcurrent size and adjust, can be according to lithium
The parameter designing requirement of battery pack is selected.It the composite can be widely applied to the UPS of demand high current, the battery supply field such as EPS.
As shown in fig. 7, lithium ion battery high current connection terminal of the present invention, including：
Connection terminal 3, is " L " shape, including orthogonal terminal board 31 and side plate 32, and its top of terminal board 31 has multiple
Line ball hole 33 arranged in parallel, side plate 32 has one or more fixing hole 34, wherein line ball hole 33 and the center line side of fixing hole 34
To vertical.Fig. 7 a are connection terminal schematic elevation view, and Fig. 7 b are connection terminal schematic side view, and Fig. 7 c are that connection terminal solid is shown
It is intended to.
The connection terminal 3 is copper tip.
The line ball hole 33 is two or more, there is three line ball holes in this example on a connection terminal 3.
Each described line ball hole 33 has crimps hole 36 in the middle of a pair of fixed parts 35, each pair fixed part 35 for core.
The line ball hole 33 is circular or square.
As shown in figure 8, lithium ion battery connecting line of the present invention, including：
Connecting line 4, is rope-lay strand, i.e., twisted into inside same wire by the core of two strands and the above.Purpose is, when
Multi cord and a strand in total line footpath as when, the caloric value of line is the same, but the mode of multi cord reduces connecting line
With the contact resistance of connection terminal, so as to reduce heat, while add area of dissipation, therefore multi cord temperature can be lower.
The core of the connecting line 4 be divided into two strands and more than, the core of a connecting wire is divided into three strands in the present embodiment.
The line ball hole 33 and the core of connecting line 4, are corresponded.
Connection terminal of the three line ball hole compenzines than the strand of a line ball hole one is shown experimentally that, line and end is effectively reduced
The contact resistance and caloric value of son, while increasing area of dissipation, cause temperature to reduce, three line ball hole three equally in 300C environment
Strand is lower than the connection terminal temperature of the strand of a line ball hole one 12 degree.
As shown in figure 9, the two ends of connecting line 4 are connected with two connection terminals 3 respectively, then by consolidating on two connection terminals 3
Determine circular hole of the hole 34 respectively with the positive negative output in two group of battery modules to align, screwed lock is firmly fixed.So as to realize two electricity
The serial or parallel connection of pond module group.
As shown in Figure 10, connection terminal 3 and connecting line 4 were specifically connected using the connected mode of welding-crimp-welding
Journey is as follows：
Step a：Welding.The inner surface of line ball hole 33 on connection terminal 3 is added into thin tin, to play the work of decontamination cleaning
With.
Step b：Wiring.The multiply core of connecting line 4 is respectively charged into multiple line ball holes 33 on connection terminal 3, one
One correspondence.The present embodiment is 3 line ball hole three cores of correspondence.
Step c：Crimping.The core corresponded to is fixed with line ball hole 33 respectively.
Step d：Welding.After space between the core and line ball hole 33 of connecting line 4 is filled with tin welding, completion entirely connects
Termination process.
In the above-mentioned technical solutions, the specification of connection terminal and connecting line is unrelated with battery capacity, only with the actual need of battery
The maximum overcurrent parameter of support is related.Battery such as a 1500KWh may only have maximum overcurrent 50A application demand,
And another 20KWh battery may need 200A high current demands.
Fig. 1 is insulation board 1, the decomposing schematic representation of insulating trip 2 and battery module.The high-capacity lithium-ion electricity that the present invention is provided
Pond group 12 can use the structure in prior art 200810026332.1, by cylindrical or cuboidal secondary lithium-ion battery core
Battery module is constituted, then a group of battery modules is combined into by multiple battery modules are arranged together.Each Battery pack module group
Six faces be packaged as a whole with shell, insulation board is generally square, and being installed on two of group of battery modules, (insulation board is not single
The shell of individual battery module), vertical with the battery core long axis direction of institute's device in battery module, the other four face of group of battery modules is
The outer wall of module group.The high capacity lithium ion battery group of one radiating explosion-proof can be prevented by 1~N number of module group and 2~2N cellular type
Quick-fried insulation board composition, N maximums can generally take 150 in existing application.
Figure 11 is insulation board schematic diagram.Insulation board is generally square, is arranged on group of battery modules battery core positive and negative end.This
The material selection bakelite plate of invention insulation board, because its fire-protection rating reaches more than UL94V-0, good insulation preformance, hardness is strong, is plastics
Plate and to be currently known other materials incomparable.The plate thickness that insulate is in corresponding relation with monomer secondary lithium ion battery volume,
Capacity is bigger, and thickness is bigger, can be determined according to experimental data, for example, thickness is 5.5mm in this example, corresponding monomer is secondary
Capacity of lithium ion battery is 2.6Ah.Be provided with circular hole 11 in insulation board position corresponding with battery core positive and negative electrode, the quantity of circular hole with
The quantity of battery core is identical, and the size of circular hole is corresponding with battery core pressure relief valve diameter, and diameter may be slightly larger than battery core pressure relief valve diameter,
Battery core pressure release aperture in this example is 11mm, and the aperture of circular hole can elect 11-11.5mm as；Circle hole centreline and battery core center
Line is overlapped.
Insulation board is provided with heat conduction explosion-proof isolation piece in the one side of contact group of battery modules, and Figure 12 is that heat conduction explosion-proof isolation piece shows
It is intended to.Three layers of integral heat conduction explosion-proof isolation piece 2 that heat conduction explosion-proof isolation piece material can be made from PP-PE-PP, in order to strengthen
Heat conductivility, surface can the Heat Conduction Material such as coated with thermally conductive silicone grease and gel；Described heat-conducting silicone grease and gel can use commercially available
Product.Heat-conducting silicone grease is composited by the good metal oxide of thermal conductivity and insulating properties with organosiloxane, with splendid
Thermal conductivity, good electrical insulating property, wider temperature in use (- 60 DEG C of operating temperature~300 DEG C) and well using stable
Property.Thermally conductive gel is a kind of new and effective Heat Conduction Material, and thermal resistance is low, and good insulation preformance, stability is good, and adhesive force is strong, and interface is several
What condition requires low.
In order to be conducive to open the ventilative body opening of micro- shape on radiating, heat conduction explosion-proof isolation piece 2, for example, bore size can be
0.03-0.2um, perforated area can account for the 40% of the gross area.The thickness of heat conduction explosion-proof isolation piece can be repeatedly real through mechanical shock
Test and draw, too thick explosion-proof capabilities are poor, too thin external impact easy damaged.As a kind of embodiment, heat conduction explosion-proof isolation piece thickness can
Elect 55-65um as, its fusing point is designed as 130~150 degrees Celsius.
Heat conduction explosion-proof isolation piece and insulation board can be integrally formed through pressing, constitute cellular type explosion-proof isolation plate, can first by
Place of the insulation board in addition to circular hole applies last layer glue, as long as jail can be pasted, not excessive glue, and thickness ensures, then that heat conduction is explosion-proof
Insulating trip horizontal drawing is attached on insulation board, then is pressed with two plane Pressurized-heateds, is most integrated afterwards through cooling, is the present invention
Cellular type explosion-proof isolation plate.
The two panels cellular type explosion-proof isolation plate of the present invention is just respectively installed to battery mould by one group of battery modules after assembling
The both sides of block group, the mounting means of prior art can be used by installing, for example, battery two first is sticked into cellular type explosion-proof isolation
Plate, then group of battery modules and cellular type explosion-proof isolation plate are caught in fixed support simultaneously.One group of battery modules both sides respectively has one
Individual cellular type explosion-proof isolation plate.Heat conduction explosion-proof isolation piece 2 can be good at external heat conduction when battery is normal, while by battery core and outside
Portion isolates, and plays a part of insulating heat-conductive；When battery temperature is higher than certain value, (such as 130~150 degree, this temperature can be by reality
Test and draw), battery core has been damaged when temperature is higher than 100 degree, if blast on fire occurs for battery, instantaneous temperature can be up to 400
More than degree, early hot melt could preferably play explosion-proof to the Zhi You more of heat conduction explosion-proof isolation piece 2.Set when internal temperature of battery exceedes
During the fusing point of meter, heated collapsing is exposed the circular apertures of insulated electro plank 1 by the explosion-proof embolium 2 of the exhausted heat conduction of heat conduction, if battery contingency hair
When raw abnormal, internal pressure can smoothly be discharged by the circular port on insulated electro plank, so as to prevent the generation of explosion accident.
Cellular type explosion-proof isolation plate length and width size in the present invention is designed according to the significantly small demand of battery module packet size
Adjustment.Circular port size is selected also according to the actual pressure relief valve size of battery core.
Claims (10)
1. a kind of Li-ion batteries piles, including a plurality of group of battery modules (12), a plurality of electricity of each group of battery modules (12)
Core (7) is connected in parallel by connection sheet, is connected in series between group of battery modules (12) by connection terminal (3), connecting line (4),
Battery pack battery core both positive and negative polarity both sides are provided with insulation board (1), it is characterised in that the every row battery core of described each group of battery modules
It is connected respectively by connection sheet (16) between positive pole, between negative pole, realizes that often row battery core is connected in parallel, described connection
Piece, including copper sheet and nickel sheet, described copper sheet are the in-line copper sheet (5) for having row's circular port (13), the center of circle pair of circular port
The center line of group of battery modules (12) battery core (7), pore size is adapted with battery core relief valve size, the number of openings and battery core
Quantity correspondence, described nickel sheet (6) is in I-shaped, and two is triangle or semicircle, and centre is in-line, and the length of nickel sheet is small
There is a space between the distance of center circle of copper sheet circular port, adjacent two nickel sheet, the center line in space is overlapped with the center line of battery core, nickel
It is welded in the middle part of piece between two adjacent circular holes of copper sheet, the end of nickel sheet is welded on the battery core positive pole in circular port (13)
Or the weld of negative terminal surface.
2. Li-ion batteries piles as claimed in claim 1, it is characterised in that the space between described adjacent two nickel sheet is 0.9
~1.1mm.
3. Li-ion batteries piles as claimed in claim 1 or 2, it is characterised in that each row battery core positive pole of described group of battery modules
Between, the end of connection sheet that is connected between negative pole interconnected respectively by a copper bar (15), realize each row of group of battery modules
Battery core is connected in parallel.
4. Li-ion batteries piles as claimed in claim 1, it is characterised in that described connection terminal (3) is L-shaped, including mutual
Vertical terminal board (31) and side plate (32), there are multiple line ball holes (33) arranged in parallel, side plate (32) in terminal board (31) top
On have fixing hole (34), fixing hole (34) is vertical with the direction of line ball hole (33) center line；Described connecting line (4) twists for multiply
Line, its core is divided into a plurality of, and quantity is corresponding with the quantity of line ball hole (33), is carried out between connection terminal (3) and connecting line (4) tight
Close connection.
5. Li-ion batteries piles as claimed in claim 4, it is characterised in that each described line ball hole (33) is consolidated by a pair
Determine portion (35) composition, be core crimping hole (36) in the middle of each pair fixed part (35), described line ball hole (33) is shaped as circle
Or it is square, described connection terminal (3) is copper tip.
6. the Li-ion batteries piles as described in claim 4 or 5, it is characterised in that the quantity of described line ball hole (33) is two
Or three, described line ball hole is closely connected with being connected core by the way of welding-crimping-welding.
7. the Li-ion batteries piles as described in claim 1 or 4, it is characterised in that described insulation board is to be provided with a plurality of circular holes
(11) bakelite plate, each circle hole centreline is overlapped with the center line of relative battery core, circular hole size and battery core pressure relief valve diameter
It is adapted, the quantity of circular hole is identical with the quantity of group of battery modules battery core, and the one side of insulation board towards battery core positive and negative electrode is provided with
The ventilative body opening of micro- shape that size is 0.03~0.2um is provided with heat conduction explosion-proof isolation piece (2), heat conduction explosion-proof isolation piece.
8. Li-ion batteries piles as claimed in claim 7, it is characterised in that described heat conduction explosion-proof isolation piece is PP-PE-PP
Three layers of integral insulating trip being made, its surface coated with thermally conductive silicone grease and gel, the ventilative body opening of described micro- shape, perforated area are accounted for always
The 40% of area, the fusing point of heat conduction explosion-proof isolation piece is 130~150 degrees Celsius.
9. Li-ion batteries piles as claimed in claim 7, it is characterised in that described heat conduction explosion-proof isolation piece and insulation board pressure
Synthesis is integrated.
10. Li-ion batteries piles as claimed in claim 8, it is characterised in that described heat conduction explosion-proof isolation piece and insulation board pressure
Synthesis is integrated.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510036431.8A CN104600236B (en) | 2015-01-23 | 2015-01-23 | A kind of Li-ion batteries piles |
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| CN201510036431.8A CN104600236B (en) | 2015-01-23 | 2015-01-23 | A kind of Li-ion batteries piles |
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| CN104600236A CN104600236A (en) | 2015-05-06 |
| CN104600236B true CN104600236B (en) | 2017-07-21 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105633417B (en) * | 2016-03-04 | 2018-05-11 | 洛阳鑫光锂电科技有限公司 | A kind of cylindrical lithium battery group collector |
| CN106058111B (en) * | 2016-08-12 | 2018-09-11 | 辽宁比科新能源股份有限公司 | A kind of thermal balance lithium ion battery packet |
| CN106784493A (en) * | 2017-01-20 | 2017-05-31 | 江门市大长江集团有限公司 | Battery of electric vehicle and electric motor car |
| CN106784489A (en) * | 2017-01-20 | 2017-05-31 | 江门市大长江集团有限公司 | Battery case, battery core mounting assembly and battery bag |
| CN109037571A (en) * | 2018-09-19 | 2018-12-18 | 福建易动力电子科技股份有限公司 | A kind of battery modules carrying out overcurrent by pressing |
| JP7381277B2 (en) * | 2019-09-30 | 2023-11-15 | 株式会社マキタ | battery pack |
| CN114552051A (en) * | 2021-07-21 | 2022-05-27 | 万向一二三股份公司 | Battery module and heat-conducting plate for enhancing heat dissipation of battery module |
| TWI810705B (en) | 2021-11-09 | 2023-08-01 | 有量科技股份有限公司 | Battery module |
| CN115196636B (en) * | 2022-09-15 | 2022-11-22 | 溧阳天目先导电池材料科技有限公司 | Metal-doped silicon-based negative electrode material and preparation method and application thereof |
| CN115692813B (en) * | 2022-11-04 | 2023-07-04 | 北京朔景新能源科技有限公司 | Fuel cell stack and fuel cell system |
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Address after: 519040 Guangdong province Zhuhai Sanzao calm bay industrial park set the science and Technology Industrial Park seven Bay Road Applicant after: JiaDe Energy Technology (Zhuhai) Co., Ltd. Address before: Pingtung 519060 Guangdong province Zhuhai Nanping Science and Technology Industrial Park Road No. 1 building two (a) a building, third floor, four floor, East Wing Applicant before: JiaDe Energy Technology (Zhuhai) Co., Ltd. |
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Denomination of invention: Charging control method and system of lithium ion battery pack Effective date of registration: 20200403 Granted publication date: 20170721 Pledgee: China Postal Savings Bank Co., Ltd. Zhuhai Branch Pledgor: JIADE ENERGY TECHNOLOGY (ZHUHAI) Co.,Ltd. Registration number: Y2020980001290 |