CN211957777U - Ultra-large capacity battery - Google Patents
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- CN211957777U CN211957777U CN202020592728.9U CN202020592728U CN211957777U CN 211957777 U CN211957777 U CN 211957777U CN 202020592728 U CN202020592728 U CN 202020592728U CN 211957777 U CN211957777 U CN 211957777U
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- 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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- 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
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Abstract
The application relates to a super-capacity battery, and belongs to the technical field of batteries. The device comprises a shell, an anode cover plate, a cathode cover plate, an anode total confluence sheet, a cathode total confluence sheet, a core rolling stack, an anode confluence rod and a cathode confluence rod. The core winding stack consists of a plurality of core winding clusters. The roll core cluster consists of a roll core group, a positive electrode cluster converging sheet, a negative electrode cluster converging sheet, a large liquid absorbing rod, a small liquid absorbing rod and a liquid absorbing plate. The positive and negative pole general confluence pieces are respectively connected with the positive and negative pole cover plates; the positive and negative electrode cover plates are hermetically welded with the shell to form the ultra-large capacity battery. The monomer capacity can be 10000 Ah. The qualification rate of the super-large capacity battery can be greatly improved; the temperature uniformity in the super-large capacity battery is further improved; the heat dissipation performance, the rate capability and the long service life of the whole super-large capacity battery are improved; the uniformity of the super-large capacity battery is improved, and the cycle life is prolonged; the structure is simple, the processing process is simple, the product consistency is good, and the comprehensive cost is low.
Description
Technical Field
The application relates to a super-capacity battery, and belongs to the technical field of batteries.
Background
In existing lithium battery applications, the use of super-large capacity batteries is often involved. At present, a plurality of single batteries are generally connected in parallel to meet the requirement of the required capacity, and for the ultra-large capacity power battery system, in order to meet the requirement of the ultra-large capacity, a large number of single batteries are required to be connected in parallel to form a battery module, and then the battery module is connected in series with other battery modules to improve the voltage of the battery pack. Considering that internal resistance exists in the parallel bus circuit, the current distribution of the single batteries at different positions in the same battery module has difference, the larger the scale of the battery module is, the larger the difference of the current among the single batteries is, the difference of the current causes different heat generation of the batteries, and then the temperature of the single batteries also has difference. The consistency among the single batteries in the battery system is increasingly poor after long-term use. Meanwhile, the ultra-large capacity battery puts higher requirements on the arrangement space and is relatively limited in practical use. Therefore, how to meet the demand of ultra-large capacity in the power battery system is a technical problem.
Some manufacturers can directly manufacture the high-capacity single battery. Compared with a small-capacity battery, the processing technology of the ultra-large-capacity battery with the capacity of more than 300Ah has the advantages of high difficulty, low yield and high cost. And because the super-large capacity battery has a large size, the super-large capacity battery has the problems of easy expansion of a large surface, difficult heat dissipation, poor rate capability, short cycle life, poor safety and the like when in use.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the application provides an ultra-large capacity battery and a manufacturing method thereof. The ultra-large capacity battery consists of a shell, an anode cover plate, a cathode cover plate, an anode total bus sheet, a cathode total bus sheet, a core winding stack, an anode bus bar and a cathode bus bar.
The core winding stack consists of a plurality of core winding clusters.
The roll core cluster consists of a roll core group, a positive electrode cluster converging sheet, a negative electrode cluster converging sheet, a large liquid absorbing rod, a small liquid absorbing rod and a liquid absorbing plate. The positive end of each winding core group is welded with a positive cluster confluence piece, and the negative end is welded with a negative cluster confluence piece after a support is added; the positive pole cluster confluence piece and the negative pole cluster confluence piece are externally and respectively provided with the liquid absorption plate, and the large liquid absorption rod is inserted between the cylindrical roll cores, so that the small liquid absorption rod is tightly matched with the roll cores, and the small liquid absorption rod can be placed at the center of the roll cores in advance when the roll cores are manufactured, thereby forming a roll core cluster. Limiting pins are arranged among the winding core clusters and connected together to form a winding core stack; the outer part of the roll core stack is wrapped with a liquid absorption winding layer; the positive pole confluence bar is connected with all the positive pole cluster confluence pieces; the negative bus bar is connected with all the negative cluster bus pieces; the anode collector bar bending head is connected with the anode total collector sheet, and the cathode collector bar bending head is connected with the cathode total collector sheet; the positive and negative pole general confluence pieces are respectively connected with the positive and negative pole cover plates; the positive and negative electrode cover plates are hermetically welded with the shell to form the ultra-large capacity battery. The monomer capacity can be 10000 Ah.
The metal cylinder with high heat conductivity and high electric conductivity is adopted to accommodate the cylindrical winding core without the pole lug, and the metal cylinder is welded, bonded or integrally formed into a whole to form a winding core group.
The shapes of the positive and negative electrode bus bars are not limited, and the cross section can be square, round, oval, rhombic and the like; the interior of the positive and negative electrode bus bars can be of a solid structure or a hollow structure; the hollow bus bar can store electrolyte.
The positive cover plate is provided with an explosion-proof valve, and the negative cover plate is provided with a negative pole column and an explosion-proof valve. The position of the explosion-proof valve is a liquid injection port, and after liquid injection is completed, the explosion-proof valve is welded at the position of the liquid injection port. Thereby forming a super-capacity battery.
In order to ensure that the small liquid suction rod is tightly matched with the winding core, the small liquid suction rod can be placed in the center of the winding core in advance when the winding core is manufactured; the large liquid suction rod is arranged between the metal cylinders of the cylindrical winding cores; liquid absorbing plates are additionally arranged on the positive electrode cluster confluence sheet and the negative electrode cluster confluence sheet; wrapping a liquid absorption winding layer outside the roll core stack, wherein the liquid absorption winding layer is physically contacted with a liquid absorption plate in each roll core cluster; the big imbibition stick, the small imbibition stick, the imbibition winding layer and the imbibition plate are all in physical contact. The liquid absorption component consisting of the large liquid absorption rod, the small liquid absorption rod, the liquid absorption winding layer and the liquid absorption plate jointly forms a network for absorbing electrolyte and storing the electrolyte so as to ensure the uniform distribution of the electrolyte in the super-capacity battery.
The battery case may be metallic or non-metallic. When the metal shell is adopted, the metal shell and the anode of the winding core group can be welded together, and the cathode pole is insulated from the cover plate. The metal shell and the negative electrode of the winding core group can be welded together, and the positive pole column is insulated from the cover plate.
The shape of the housing is not limited to cylindrical or square and can be designed to any desired shape.
The non-polar-ear cylindrical winding core inside the super-capacity battery is composed of positive and negative poles of the same system, for example, any one of chemical power supplies such as a lithium iron phosphate-graphite winding core, a lithium manganate-graphite winding core, a nickel cobalt lithium manganate-graphite winding core, a lithium cobaltate-lithium titanate winding core, a lithium manganate-lithium titanate winding core, a super capacitor winding core, a metal hydride-nickel winding core, a cadmium-nickel winding core and a zinc-nickel winding core, and is not limited to the system.
The no-ear cylinder roll core in the super-capacity battery can be combined with roll cores of different material systems, for example, a lithium manganate-graphite roll core and a nickel cobalt lithium manganate-graphite roll core are combined, a power type super capacitor roll core and a lithium ion roll core of the energy type of the same type of anode material are combined, and the like. Two types of winding cores with different characteristics are combined in parallel to form the ultra-large capacity battery, so that the performance is improved, and the cost is reduced.
The processing method of the ultra-large capacity battery comprises the following steps:
(1) the cylindrical winding core is of an ear-free structure, and when the winding core is manufactured, a small liquid suction rod is placed in advance and is arranged at the center of the winding core; one end of the roll core is an anode matrix, and the other end of the roll core is a cathode matrix;
(2) welding the metal cylinder of the ear-free cylindrical winding core into a whole according to the shape of the shell;
(3) sequentially putting the winding core bodies into the metal cylinder; clamping the bracket at the negative electrode end of the cylindrical winding core without the lug, and fixing the cylindrical winding core without the lug; inserting a large liquid suction rod between the metal cylinders of the cylindrical winding cores;
(4) welding the positive electrode cluster confluence sheet with a positive electrode substrate of the lug-free cylindrical winding core, and attaching a liquid absorption plate on the positive electrode cluster confluence sheet;
(5) welding the negative electrode cluster confluence sheet with a negative electrode substrate of the ear-free cylindrical winding core, and attaching a liquid absorption plate on the negative electrode cluster confluence sheet; thereby completing the manufacture of a core cluster;
(6) manufacturing N roll core clusters by the same method, enabling the negative electrode of the odd roll core cluster a to be opposite to the negative electrode of the even roll core cluster a +1, placing a limiting pin on the bracket of the odd roll core cluster a, and then assembling the even roll core cluster a +1 and the even roll core cluster a +1 together in a matching way through the limiting pin;
the positive electrode of the even-number core cluster a +1 is opposite to the positive electrode of the odd-number core cluster a +2, after a limiting pin is placed on the support of the even-number core cluster a +1, the odd-number core cluster a +2 and the odd-number core cluster a +2 are assembled together in a matching way through the limiting pin; all the roll core clusters are sequentially arranged according to the method.
(7) The positive cluster confluence pieces and the negative cluster confluence pieces are respectively provided with a plurality of lead-out pieces, the bent elbows of the positive bus bars are welded with the lead-out pieces on all the positive cluster confluence pieces one by one, and the tail ends of the bent elbows of the positive bus bars are welded with the positive total confluence pieces; the bent elbows of the negative pole confluence bars are welded with the leading-out pieces on all the negative pole cluster confluence pieces one by one, and the tail ends of the bent elbows of the negative pole confluence bars are welded with the negative pole general confluence pieces; thereby combining to form a super-capacity core-rolling stack;
(8) except the welding area, the rest parts of the bent head of the cathode bus bar are subjected to insulation treatment, such as sleeving an insulating film, spraying an insulating material and the like. Avoid contact with the metal cylinder; the bending head of the positive bus bar is not required to be subjected to insulation treatment;
(9) supporting blocks are arranged on two sides of each roll core cluster and used for supporting the anode collector bar bending head and the cathode collector bar bending head;
(10) wrapping a liquid absorption winding layer outside the roll core stack, wherein the liquid absorption winding layer is physically contacted with a liquid absorption plate in each roll core cluster; thus, a complete absorbent assembly is formed consisting of a small absorbent rod, a large absorbent rod, an absorbent sheet, and an absorbent wrap.
(11) Welding a positive post embedded in a positive cover plate (metal or nonmetal) with a positive total bus sheet;
(12) stacking the assembled winding core into a shell, and sealing the positive cover plate and the shell in a welding, bonding or mechanical sealing mode and the like;
(13) welding the negative electrode cover plate and the negative electrode total bus sheet;
(14) the negative electrode cover plate and the shell are sealed in a welding, bonding or mechanical sealing mode and the like;
(15) drying the internal water;
(16) injecting liquid into the battery through a liquid injection port on the negative cover plate;
(17) opening formation (or closing formation after welding the explosion-proof valve);
(18) cleaning the liquid injection port and welding the explosion-proof valve.
The application has the following technical effects and advantages:
1. the ultra-large capacity single battery is manufactured by winding core groups, winding core clusters (inserting the liquid absorbing rod and the liquid absorbing plate) and winding core stacks which are formed by a plurality of small capacity cylindrical winding cores in parallel, the whole is broken into parts, the small capacity cylindrical winding cores with good consistency are used for replacing large winding cores or laminated pole groups, and the qualification rate of the ultra-large capacity battery can be greatly improved.
2. The positive electrode cluster converging sheet is welded with the metal cylinder of the cylindrical roll core, the positive electrode cluster converging sheet and the metal cylinder of the cylindrical roll core are integrated at a welding point, the connecting resistance is reduced, the heat transfer speed of the roll core is improved, and the temperature uniformity inside the super-capacity battery is further improved.
3. Through welding two by two between the metal drum, between metal drum and positive pole cluster confluence piece, between positive pole confluence bar bend and each positive pole cluster confluence piece, weld between negative pole confluence bar bend and each negative pole cluster confluence piece simultaneously, realize holistic high heat conduction and high electric network from this, reduce the internal resistance of battery, improve the thermal diffusivity of whole super large capacity battery, multiplying power performance and long-life.
4. The liquid absorption component in the super-capacity battery can transmit and store electrolyte, can automatically balance the electrolyte amount in each cylindrical winding core, can avoid the electrolyte in the winding core from drying up, improves the uniformity of the super-capacity battery, and prolongs the cycle life.
5. The structure is simple, the processing process is simple, the product consistency is good, and the comprehensive cost is low.
Drawings
Fig. 1 is an exploded view of a super large capacity battery of the present application.
Fig. 2 is a schematic structural diagram of the super-large capacity battery of the present application.
Detailed Description
The following detailed description of embodiments of the present application refers to the accompanying drawings. The following examples are intended to illustrate the present application but are not intended to limit the scope of the present application.
Fig. 1 is an exploded view of a super large capacity battery of the present application. Fig. 2 is a schematic structural diagram of the super-large capacity battery of the present application. In the figure, 1 is a negative cover plate, 2 is a negative total confluence plate, 3 is a negative cluster confluence plate, 4 is a shell, 5 is a bracket, 6 is a winding core group, 7 is a positive cluster confluence plate, 8 is a positive cover plate, 9 is a positive total confluence plate, 11 is a negative confluence bar bending head, 12 is a negative confluence bar, 81 is a positive confluence bar bending head, 82 is a positive confluence bar, 31 is a liquid absorbing plate, 41 is a small liquid absorbing bar, 42 is a large liquid absorbing bar, 43 is a liquid absorbing winding layer, 51 is a limiting pin, and 52 is a supporting block.
As shown in the figure, the ultra-large capacity battery comprises a shell 4, a positive cover plate 8, a negative cover plate 1, a positive total bus sheet 9, a negative total bus sheet 2, a winding core stack, a positive bus bar 82 and a negative bus bar 81. The core winding stack consists of a plurality of core winding clusters. The winding core cluster comprises a winding core group 6, a positive electrode cluster bus bar 7, a negative electrode cluster bus bar 3, a large liquid suction rod 42, a small liquid suction rod 41 and a liquid suction plate 31. The positive end of each winding core group 6 is welded with a positive cluster confluence sheet 7, and the negative end is welded with a negative cluster confluence sheet 3 after a bracket 5 is added; the positive electrode cluster bus bar piece 7 and the negative electrode cluster bus bar piece 3 are externally and uniformly provided with the liquid absorbing plate 31, and then a large liquid absorbing rod 42 is inserted between the cylindrical roll cores of the roll core group 6, so that the small liquid absorbing rod 41 is tightly matched with the cylindrical roll cores, and the small liquid absorbing rod 41 can be placed in the center of the roll cores in advance when the roll cores are manufactured, thereby forming a roll core cluster. Limiting pins 51 are arranged among the winding core clusters and connected together to form a winding core stack; wrapping the liquid absorbing winding layer 43 outside the roll core stack; the positive electrode bus bar 82 is connected with all the positive electrode cluster bus bars 7; the cathode bus bar 12 is connected with all the cathode cluster bus bars 3; the positive busbar bending head 81 is connected with the positive total busbar 9, and the negative busbar bending head 11 is connected with the negative total busbar 2; the positive and negative pole total confluence pieces 9 and 2 are respectively connected with the positive and negative pole cover plates 8 and 1; the positive and negative electrode cover plates 8 and 1 are hermetically welded with the shell 4 to form a super-capacity battery. The monomer capacity can be 10000 Ah.
The metal cylinder with high heat conductivity and high electric conductivity is adopted to accommodate the cylindrical winding core without the pole lug, and the metal cylinder is welded, bonded or integrally formed into a whole to form a winding core group.
The shapes of the positive and negative electrode bus bars are not limited, and the cross section can be square, round, oval, rhombic and the like; the interior of the positive and negative electrode bus bars can be of a solid structure or a hollow structure; the hollow bus bar (rod) can store electrolyte;
the positive cover plate 8 is provided with an explosion-proof valve, and the negative cover plate 1 is provided with a negative pole column and an explosion-proof valve. The position of the explosion-proof valve is a liquid injection port, and after liquid injection is completed, the explosion-proof valve is welded at the position of the liquid injection port. Thereby forming a super-capacity battery.
In order to ensure that the small liquid suction rod 41 is tightly matched with the winding core, the small liquid suction rod 41 can be placed in the center of the winding core in advance when the winding core is manufactured; the large liquid absorbing rod 42 is arranged between the metal cylinders of the cylindrical winding cores; a liquid absorbing plate 31 is additionally arranged on the positive cluster confluence plate 7 and the negative cluster confluence plate 3; wrapping a liquid-absorbent winding layer 43 outside the core stack (cluster), the liquid-absorbent winding layer 43 being in physical contact with the liquid-absorbent sheet 31 in each core group 6; the large liquid-absorbing rod 42, the small liquid-absorbing rod 41, the liquid-absorbing wrapping layer 43 and the liquid-absorbing plate 31 are all in physical contact. The liquid absorbing components consisting of the large liquid absorbing rod 42, the small liquid absorbing rod 41, the liquid absorbing winding layer 43 and the liquid absorbing plate 31 jointly form a network for absorbing electrolyte and storing the electrolyte so as to ensure the uniform distribution of the electrolyte in the super-capacity battery.
The battery case 4 may be metal or non-metal. When a metal shell is adopted, the metal shell 4 and the anode of the winding core group 6 can be welded together, and the cathode pole is insulated from the cover plate. The metal shell 4 and the cathode of the winding core group 6 can be welded together, and the anode pole is insulated from the cover plate.
The shape of the housing 4 is not limited to a cylindrical shape or a square shape, and may be designed to any desired shape.
The non-polar-ear cylindrical winding core 6 in the ultra-large-capacity battery comprises a positive electrode and a negative electrode of the same system, for example, any one of chemical power supplies such as a lithium iron phosphate-graphite winding core, a lithium manganate-graphite winding core, a nickel cobalt lithium manganate-graphite winding core, a lithium cobaltate-lithium titanate winding core, a lithium manganate-lithium titanate winding core, a supercapacitor winding core, a metal hydride-nickel winding core, a cadmium-nickel winding core and a zinc-nickel winding core, and is not limited to the system.
The non-polar ear cylindrical winding core 6 in the super-capacity battery can be combined with winding cores of different material systems, for example, a lithium manganate-graphite winding core and a nickel cobalt lithium manganate-graphite winding core are combined, and a power type super capacitor winding core and an energy type lithium ion winding core of the same type of anode material are combined. Two types of winding cores with different characteristics are combined in parallel to form the ultra-large capacity battery, so that the performance is improved, and the cost is reduced.
The processing method of the ultra-large capacity battery comprises the following steps:
(1) the cylindrical winding core is of a non-lug structure, and when the winding core is manufactured, the small liquid suction rod 41 is placed in the center of the winding core in advance; one end of the roll core is an anode matrix, and the other end of the roll core is a cathode matrix;
(2) welding the metal cylinder of the ear-free cylindrical winding core into a whole according to the shape of the metal shell;
(3) sequentially putting the winding core bodies into the metal cylinder; clamping the bracket 5 at the negative end of the poleless ear cylindrical winding core to fix the poleless ear cylindrical winding core; inserting a large liquid suction rod 42 between the metal cylinders of each cylindrical winding core;
(4) welding the positive electrode cluster bus-bar plate 7 with the positive electrode matrix of the poleless ear cylindrical winding core, and attaching a liquid absorption plate 31 on the positive electrode cluster bus-bar plate 7;
(5) welding the negative electrode cluster bus-bar plate 3 with a negative electrode matrix of the cylindrical winding core without the electrode ears, and attaching a liquid absorption plate 31 on the negative electrode cluster bus-bar plate 3; thereby completing the manufacture of a core cluster;
(6) manufacturing N roll core clusters by the same method, enabling the negative electrode of the odd roll core cluster a to be opposite to the negative electrode of the even roll core cluster a +1, placing a limiting pin 51 on the bracket of the odd roll core cluster a, and then assembling the even roll core cluster a +1 and the even roll core cluster a +1 together in a matching way through the limiting pin 51; the positive pole of the even-numbered core cluster a +1 is opposite to the positive pole of the odd-numbered core cluster a +2, after a limiting pin 51 is placed on the bracket of the even-numbered core cluster a +1, the odd-numbered core cluster a +2 and the odd-numbered core cluster a +2 are assembled together in a matching way through the limiting pin 51; all the roll core clusters are sequentially arranged according to the method.
(7) The positive cluster confluence sheet 7 and the negative cluster confluence sheet 3 are respectively provided with a plurality of lead-out sheets, the bent heads 81 of the positive bus bars are welded with the lead-out sheets on all the positive cluster confluence sheets 7 one by one, and the tail ends of the bent heads 81 of the positive bus bars are welded with the positive total confluence sheet 9; the negative pole confluence bar bending heads 11 are welded with the leading-out pieces on all the negative pole cluster confluence pieces 3 one by one, and the tail ends of the negative pole confluence bar bending heads 11 are welded with the negative pole total confluence pieces 2; thereby combining to form a super-capacity core-rolling stack;
(8) the other parts of the bent head 11 except the welding area are subjected to insulation treatment, such as sheathing an insulating film, spraying an insulating material, and the like. Avoid contact with the metal cylinder; insulation processing is not needed on the positive busbar bending head 81;
(9) two sides of each winding core cluster are provided with supporting blocks 52 for supporting the anode bus bar bending head 81 and the cathode bus bar bending head 11;
(10) wrapping a liquid-absorbing winding layer 43 outside the core stack, wherein the liquid-absorbing winding layer 43 is in physical contact with the liquid-absorbing plate 31 in each core cluster; thus, a complete absorbent assembly is formed consisting of small absorbent rod 41, large absorbent rod 42, absorbent sheet 31, and absorbent wrap 43.
(11) Welding a positive post embedded in a positive cover plate 8 (metal or nonmetal) with a positive total bus sheet;
(12) placing the assembled core winding stack into the shell 4, and sealing the positive cover plate 8 and the shell 4 by welding, bonding or mechanical sealing and the like;
(13) welding the negative electrode cover plate 1 and the negative electrode total bus bar 2;
(14) the negative electrode cover plate 1 and the shell 4 are sealed in a welding, bonding or mechanical sealing mode and the like;
(15) drying the internal water;
(16) injecting liquid into the battery through a liquid injection port on the negative electrode cover plate 1;
(17) opening formation (or closing formation after welding the explosion-proof valve);
(18) cleaning the liquid injection port and welding the explosion-proof valve.
Example 1:
by using the processing method, 9 lithium iron phosphate positive-graphite negative winding core bodies (with the diameter of 32mm and the height of 140mm) are made into a 3.2V135Ah winding core group 6, a liquid absorbing plate 31 and liquid absorbing rods 41 and 42 are added to make a winding core cluster, and then 4 winding core clusters are connected in parallel to form a winding core stack, so that the 3.2V540Ah ultra-large capacity battery is manufactured.
Example 2:
by using the processing method, 30 lithium iron phosphate positive electrode-graphite negative electrode winding core bodies (with the diameter of 32mm and the height of 140mm) are made into a 3.2V450Ah winding core group 6, a liquid absorption plate 31 and liquid absorption rods 41 and 42 are added to make a winding core cluster, and then 4 winding core clusters are connected in parallel to form a winding core stack, so that the ultra-large capacity battery with the capacity of 3.2V1800Ah is manufactured.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application.
Claims (7)
1. A super-capacity battery is characterized by comprising a shell, a positive cover plate, a negative cover plate, a positive total bus sheet, a negative total bus sheet, a core winding stack, a positive bus bar and a negative bus bar; the core winding stack consists of a plurality of core winding clusters; the roll core cluster consists of a roll core group, a positive electrode cluster confluence sheet, a negative electrode cluster confluence sheet, a large liquid absorbing rod, a small liquid absorbing rod and a liquid absorbing plate; the positive end of each winding core group is welded with a positive cluster confluence piece, and the negative end is welded with a negative cluster confluence piece after a support is added; liquid absorbing plates are added outside the positive electrode cluster converging sheet and the negative electrode cluster converging sheet, a large liquid absorbing rod is inserted between the cylindrical roll cores, and in order to ensure that the small liquid absorbing rod is tightly matched with the roll cores, the small liquid absorbing rod can be placed in the centers of the roll cores in advance during the roll core manufacturing, so that a roll core cluster is formed; limiting pins are arranged among the winding core clusters and connected together to form a winding core stack; the outer part of the roll core stack is wrapped with a liquid absorption winding layer; the positive pole confluence bar is connected with all the positive pole cluster confluence pieces; the negative bus bar is connected with all the negative cluster bus pieces; the anode collector bar bending head is connected with the anode total collector sheet, and the cathode collector bar bending head is connected with the cathode total collector sheet; the positive and negative pole general confluence pieces are respectively connected with the positive and negative pole cover plates; the positive and negative electrode cover plates are hermetically welded with the shell to form the ultra-large capacity battery.
2. The ultra-large capacity battery as recited in claim 1, wherein the tab-less cylindrical winding core is accommodated by using a highly thermally and electrically conductive metal cylinder, which is welded, bonded or integrally formed as a single body to form a winding core assembly.
3. The ultra-large capacity battery as recited in claim 1 or 2, wherein the shape of the positive and negative electrode bus bars is not limited, and the cross section can be square, circular, oval or diamond; the interior of the positive and negative electrode bus bars can be of a solid structure or a hollow structure; the hollow bus bar can store electrolyte.
4. The ultra-large capacity battery according to claim 1 or 2, wherein the positive cover plate is provided with an explosion-proof valve, and the negative cover plate is provided with a negative pole column and an explosion-proof valve; the position of the explosion-proof valve is a liquid injection port, and after liquid injection is completed, the explosion-proof valve is welded at the position of the liquid injection port.
5. The ultra-large capacity battery as claimed in claim 1 or 2, wherein, in order to ensure that the small liquid absorbing rod is tightly matched with the winding core, the small liquid absorbing rod can be placed in the center of the winding core in advance when the winding core is manufactured; the large liquid suction rod is arranged between the metal cylinders of the cylindrical winding cores; liquid absorbing plates are additionally arranged on the positive electrode cluster confluence sheet and the negative electrode cluster confluence sheet; wrapping a liquid absorption winding layer outside the roll core stack, wherein the liquid absorption winding layer is physically contacted with a liquid absorption plate in each roll core cluster; the large liquid absorbing rod, the small liquid absorbing rod, the liquid absorbing winding layer and the liquid absorbing plate are in physical contact, and a liquid absorbing assembly consisting of the large liquid absorbing rod, the small liquid absorbing rod, the liquid absorbing winding layer and the liquid absorbing plate jointly forms a network for absorbing electrolyte and storing the electrolyte so as to ensure the uniform distribution of the electrolyte in the super-capacity battery.
6. The ultra-high capacity battery as recited in claim 1 or 2, wherein the housing may be metallic or non-metallic; when the metal shell is adopted, the metal shell and the anode of the winding core group can be welded together, and the cathode pole is insulated from the cover plate; or the metal shell and the cathode of the winding core group are welded together, and the anode pole is insulated from the cover plate.
7. The ultra-large capacity battery as recited in claim 1 or 2, wherein the shape of the housing is not limited to a cylindrical shape or a square shape, and can be designed in any desired shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020592728.9U CN211957777U (en) | 2020-04-20 | 2020-04-20 | Ultra-large capacity battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020592728.9U CN211957777U (en) | 2020-04-20 | 2020-04-20 | Ultra-large capacity battery |
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| Publication Number | Publication Date |
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| CN211957777U true CN211957777U (en) | 2020-11-17 |
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| CN202020592728.9U Active CN211957777U (en) | 2020-04-20 | 2020-04-20 | Ultra-large capacity battery |
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