CN211858726U - High-capacity battery with multi-pole columns - Google Patents
High-capacity battery with multi-pole columns Download PDFInfo
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- CN211858726U CN211858726U CN202020592685.4U CN202020592685U CN211858726U CN 211858726 U CN211858726 U CN 211858726U CN 202020592685 U CN202020592685 U CN 202020592685U CN 211858726 U CN211858726 U CN 211858726U
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Abstract
The application relates to a high-capacity battery with a multi-pole column, and belongs to the technical field of batteries. The lithium ion battery comprises a metal shell, a non-polar lug cylindrical winding core, a positive electrode cover plate, a negative electrode cover plate, a positive electrode bus bar, a negative electrode bus bar, a liquid absorption assembly and a battery bracket; the cylindrical winding core without the lug consists of a winding core body and a metal cylinder for accommodating the winding core body; a plurality of lug-free cylindrical winding cores are arranged in the metal shell, the anode substrate of the lug-free cylindrical winding cores is welded with the anode bus bar, the cathode substrate is welded with the cathode bus bar, and the winding cores are welded into a winding core group; the negative electrode end fixes the cylindrical winding cores without lugs by using a battery bracket, and the battery bracket is clamped between the cylindrical winding cores without lugs; the positive electrode substrate, the positive electrode bus bar and the metal cylinder at the positive electrode end of the lug-free cylindrical winding core are welded; and a plurality of polar posts are arranged on the positive electrode cover plate and the negative electrode cover plate. The power output performance of the battery is improved, heat dissipation is facilitated, the temperature uniformity and safety of the battery are improved, and the service life of the battery is prolonged.
Description
Technical Field
The application relates to a high-capacity battery with a multi-pole column, and belongs to the technical field of batteries.
Background
The lithium ion battery has the advantages of high energy density (3-5 times of lead acid), long cycle life (3-20 times of lead acid), small self-discharge, no memory effect, good low-temperature performance, low maintenance cost, quick charge, high efficiency, long heavy-current discharge time and the like, and the comprehensive performance of the lithium ion battery is far superior to that of the traditional lead acid battery and is the first choice of large-scale energy storage and power supply. Compared with lead-acid batteries of thousands of ampere-hours, the maximum monomer capacity of the current lithium ion battery is 300Ah (Ningde time, BYD), and the maximum monomer capacity in the world is only 100Ah (LG). The current common practice in the industry is to increase the size of an internal pole piece to increase the capacity of a single battery. When the capacity is more than 300Ah, one end or two ends of the shell are respectively provided with a single anode output pole and a single cathode output pole. Due to the limitation of the space structure, when a single positive pole and a single negative pole output high power, the positive pole and the negative pole heat seriously, the temperature difference inside the single battery reaches up to 20 ℃, and the safety and the long service life of the battery are both unfavorable.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the application provides a multi-pole high-capacity battery and a manufacturing method thereof. The metal cylinder with high heat conductivity and high electric conductivity is adopted to accommodate the poleless ear cylindrical winding core, the metal cylinder forms a whole body in a connection mode of welding and the like, and then the metal cylinder is welded with the positive electrode substrate, the positive electrode bus sheet and the metal shell of the poleless ear cylindrical winding core to form a whole body, so that the heat dissipation performance and the rate capability of each poleless cylindrical winding core are greatly improved; through welding two by two between metal casing and the metal drum, between metal drum and the anodal convergent lobe, between anodal base member and the anodal convergent lobe, realize holistic high heat conduction and high electric network, reduce battery internal resistance, improve the thermal diffusivity performance and the long-life of whole large capacity battery. The output performance of power is improved by arranging a plurality of poles (at least two poles) on the positive and negative pole cover plates.
The multi-pole high-capacity battery comprises a metal shell, a non-polar lug cylindrical winding core, a positive electrode cover plate, a negative electrode cover plate, a positive electrode bus sheet, a negative electrode bus sheet, a liquid absorbing assembly (a large liquid absorbing rod, a small liquid absorbing rod and a liquid absorbing plate) and a battery bracket;
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; the liquid suction plate is positioned between the cover plate and the confluence plate; the large liquid absorbing rod, the small liquid absorbing rod and the liquid absorbing plate are in physical contact, and jointly form a network for absorbing electrolyte and storing the electrolyte, so that the uniform distribution of the electrolyte in the large-capacity battery is realized.
The shape of the metal housing is not limited to a cylinder or a square, and can be designed into any desired shape.
The cylindrical winding core without the lug consists of a winding core body and a metal cylinder for accommodating the winding core body; one end of the roll core is a positive electrode matrix (such as aluminum foil), and the other end is a negative electrode matrix (such as copper foil).
A plurality of lug-free cylindrical winding cores are arranged in the metal shell, the positive electrode base body of each lug-free cylindrical winding core is welded with the positive electrode bus sheet, the negative electrode base body is welded with the negative electrode bus sheet, and the lug-free cylindrical winding cores are welded into a winding core group.
The cathode end fixes the cylindrical winding cores by using a battery bracket, and the battery bracket is clamped between the non-polar lug cylindrical winding cores; the upper position of the axial direction is limited by an insulating heat conducting sheet and a negative cover plate, and the lower position of the axial direction is limited by a metal cylinder.
And the positive substrate, the positive bus bar and the metal cylinder at the positive end of the cylindrical winding core without the lug are welded.
And the anode cover plate and the cathode cover plate are provided with a plurality of poles, and the cathode cover plate is provided with a liquid injection port and an explosion-proof valve.
The non-polar-ear cylindrical winding core inside the multi-polar-column high-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 manganese oxide-graphite winding core, a nickel cobalt lithium manganese oxide-graphite winding core, a lithium cobalt oxide-lithium titanate winding core, a lithium manganese oxide-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.
Meanwhile, the poleless ear cylindrical winding core in the high-capacity battery can be combined by winding core bodies of different material systems, such as a lithium manganate-graphite winding core and a nickel cobalt lithium manganate-graphite winding core, a power type super capacitor winding core and an energy type lithium ion winding core of the same type of anode material. Two types of winding cores with different characteristics are combined in parallel to form a high-capacity battery, so that the performance is improved, and the cost is reduced.
It should be noted that, different battery systems are suitable for different types of metals, which belongs to the known technology in the industry, for example, lithium ion batteries adopt aluminum as the material of a metal shell and a metal cylinder, and the anode matrix of the electrodeless ear cylinder winding core is aluminum foil, and the cathode matrix is copper foil; for example, capacitors and batteries using lithium titanate as a negative electrode material adopt aluminum as the materials of a metal shell and a metal cylinder, and the positive electrode and the negative electrode substrates of the lug-free cylindrical roll core are aluminum foils; stainless steel or other materials may be used as the material of the metal housing and the metal cylinder.
The processing method of the multi-pole high-capacity battery comprises the following steps:
(1) the cylindrical roll core is of an ear-free structure, and in order to ensure that the liquid absorbing rod is tightly matched with the roll core, a small liquid absorbing rod is placed in the center of the roll core in advance when the roll core is manufactured, wherein one end of the roll core is an anode aluminum foil, and the other end of the roll core is a cathode copper foil;
(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 inserting the cylindrical roll cores into the metal cylinder;
(4) inserting a large liquid suction rod between the metal cylinders of the cylindrical winding cores;
(5) clamping the battery bracket at the negative end of the poleless ear cylindrical winding core and fixing the poleless ear cylindrical winding core;
(6) welding the positive bus bar with the positive substrate of the cylindrical winding core without the lug;
(7) welding the negative electrode bus bar with the negative electrode substrate of the lug-free cylindrical winding core;
(8) placing a positive liquid absorption plate on the positive bus bar;
(9) placing a negative liquid absorption plate on the negative bus bar;
(10) the positive liquid absorbing plate is in physical contact with the large liquid absorbing rod and the small liquid absorbing rod, and the negative liquid absorbing plate is also in physical contact with the large liquid absorbing rod and the small liquid absorbing rod, so that a network for absorbing electrolyte and storing the electrolyte is formed;
(11) welding the positive cover plate and the positive bus bar;
(12) placing the assembled roll core group into a metal shell, and welding and sealing the positive cover plate and the metal shell;
(13) welding the negative electrode cover plate and the negative electrode bus bar;
(14) and finally, welding and sealing the negative cover plate and the metal shell.
(15) Drying the internal water;
(16) injecting liquid into the battery through the liquid injection port;
(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 positive and negative pole cover plates are provided with a plurality of poles (at least two), so that the power output performance of the battery is improved, the heat dissipation is facilitated, the temperature uniformity and the safety of the battery are improved, and the service life of the battery is prolonged.
2. The small-capacity lug-free cylindrical winding cores are connected in parallel to form the large-capacity single battery, and the consistency of the small-capacity lug-free cylindrical winding cores is good, so that the qualification rate of the large-capacity single battery is greatly improved.
3. The anode substrate, the anode bus bar and the metal cylinder of the ear-free cylindrical winding core are welded, so that the bus bar and the metal cylinder of the ear-free cylindrical winding core are integrated at a welding point, the connection resistance is reduced, the heat transfer speed of the single battery is improved, and the heat dissipation efficiency of the large-capacity battery is further improved.
4. The cylindrical winding core without the lug is respectively welded with the anode base body and the cathode base body through the anode and cathode confluence pieces, so that the welding area is increased, the welding path is shortened, and the power output capability is greatly improved.
5. Through welding two by two between metal casing and the metal drum, between metal drum and the anodal terminal surface convergent flow piece, realize holistic high heat conduction and high electric network, reduce battery internal resistance, improve the thermal diffusivity, rate capability, the security and the life-span of whole large capacity battery.
6. The high-capacity battery can add electrolyte into the gap between the ear-free cylindrical winding core and the shell, the liquid injection efficiency in the production process is high, and the cycle life can be prolonged due to more electrolyte reserves.
7. Simple structure, simple processing process and low comprehensive cost.
Drawings
Fig. 1 is an exploded schematic view of a multi-pole large-capacity battery of example 1 of the present application.
Fig. 2 is an exploded view of a multi-pole large-capacity battery of example 2 of the present application.
Fig. 3 is an exploded schematic view of a multi-pole large capacity battery of example 3 of the present application.
Fig. 4 is a perspective view of the multi-pole high 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 schematic view of a multi-pole large-capacity battery of example 1 of the present application. Fig. 2 is an exploded view of a multi-pole large-capacity battery of example 2 of the present application. Fig. 3 is an exploded schematic view of a multi-pole large capacity battery of example 3 of the present application. Fig. 4 is a perspective view of the multi-pole high capacity battery of the present application. In the figure, 1 is a negative cover plate, 2 is a liquid absorbing component, 3 is a negative converging sheet, 4 is a metal shell, 5 is a battery support, 6 is a cylindrical winding core, 7 is a positive converging sheet, 8 is a positive cover plate, 9 is a negative pole column, 10 is a positive pole column, 11 is an upper nut, 12 is a lower nut, 31 is a negative liquid absorbing plate, 32 is a positive liquid absorbing plate, 41 is a small liquid absorbing rod, and 42 is a large liquid absorbing rod.
The multi-pole high-capacity battery comprises a metal shell 4, a non-polar lug cylindrical winding core 6, a positive cover plate 8, a negative cover plate 1, a positive bus sheet 7, a negative bus sheet 3, a liquid absorption assembly 2 (a large liquid absorption rod 42, a small liquid absorption rod 41, a liquid absorption plate (31 is a negative liquid absorption plate, and 32 is a positive liquid absorption plate)) and a battery bracket 5;
in order to ensure that the small liquid suction rod 41 is tightly matched with the cylindrical winding core, the small liquid suction rod 41 can be placed in the center of the cylindrical winding core 6 in advance when the cylindrical winding core 6 is manufactured; the large liquid absorption rod 42 is arranged between the metal cylinders of the cylindrical winding cores 6; the liquid absorption plates 31, 32 are positioned between the cover plates 1, 2 and the bus bars 3, 7; the large liquid absorbing rod 42 and the small liquid absorbing rod 41 are in physical contact with the liquid absorbing plate to form a large network for absorbing electrolyte and storing electrolyte together, so that the electrolyte in the large-capacity battery is uniformly distributed.
The shape of the metal case 4 is not limited to a cylindrical shape or a square shape, and may be designed to any desired shape.
The cylindrical winding core 6 without the lug consists of a winding core body and a metal cylinder for accommodating the winding core body; one end of the roll core is a positive electrode matrix (such as aluminum foil), and the other end is a negative electrode matrix (such as copper foil).
A plurality of lug-free cylindrical winding cores 6 are arranged in the metal shell 4, the positive electrode base body of the lug-free cylindrical winding cores 6 is welded with the positive electrode bus sheet 7, the negative electrode base body is welded with the negative electrode bus sheet 3, and the winding core group is formed by welding in this way.
The cathode end fixes the cylindrical winding cores 6 by using a battery bracket 5, and the battery bracket 5 is clamped between the cylindrical winding cores 6 without the electrode lugs; the upper position of the axial direction is limited by an insulating heat conducting sheet and a negative electrode cover plate 1, and the lower position of the axial direction is limited by a metal cylinder.
And the positive substrate, the positive bus bar 7 and the metal cylinder at the positive end of the lug-free cylindrical winding core 6 are welded.
The anode cover plate and the cathode cover plate are provided with a plurality of poles 9 and 10, and the cathode cover plate 1 is provided with a liquid injection port and an explosion-proof valve.
The positive electrode terminal 10 is a terminal made of aluminum, and the negative electrode terminal 9 is a terminal made of copper.
The non-polar-ear cylindrical winding core 6 in the multi-polar-column high-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 manganese oxide-graphite winding core, a nickel cobalt lithium manganese oxide-graphite winding core, a lithium cobalt oxide-lithium titanate winding core, a lithium manganese oxide-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.
Meanwhile, the poleless ear cylindrical winding core 6 in the high-capacity battery can be combined by winding cores of different material systems, such as a lithium manganate-graphite winding core and a nickel cobalt lithium manganate-graphite winding core, a power type super capacitor winding core and an energy type lithium ion winding core of the same type of anode material. Two types of winding cores with different characteristics are combined in parallel to form a high-capacity battery, so that the performance is improved, and the cost is reduced.
It should be noted that, different battery systems are suitable for different types of metals, which belongs to the known technology in the industry, for example, lithium ion batteries adopt aluminum as the material of a metal shell and a metal cylinder, and the anode matrix of the electrodeless ear cylinder winding core is aluminum foil, and the cathode matrix is copper foil; for example, capacitors and batteries using lithium titanate as a negative electrode material adopt aluminum as the materials of a metal shell and a metal cylinder, and the positive electrode and the negative electrode substrates of the lug-free cylindrical roll core are aluminum foils; stainless steel or other materials may be used as the material of the metal housing and the metal cylinder.
The processing method of the multi-pole high-capacity battery comprises the following steps:
(1) the cylindrical winding core 6 is of an ear-free structure, and in order to ensure that the liquid absorbing rod is tightly matched with the winding core, a small liquid absorbing rod is placed in the center of the winding core in advance when the winding core is manufactured, wherein one end of the winding core is an anode aluminum foil, and the other end of the winding core is a cathode copper foil;
(2) welding the metal cylinder of the ear-free cylindrical winding core 6 into a whole according to the shape of the metal shell;
(3) inserting the cylindrical winding cores 6 into the metal cylinder in sequence;
(4) a large liquid suction rod is inserted between the metal cylinders of the cylindrical winding cores 6;
(5) clamping the battery bracket 5 at the negative end of the poleless ear cylindrical winding core 6 to fix the poleless ear cylindrical winding core;
(6) welding the positive bus bar 7 with the positive substrate of the ear-free cylindrical winding core 6;
(7) welding the negative electrode bus bar 3 with the negative electrode substrate of the lug-free cylindrical winding core 6;
(8) a positive electrode liquid absorbing plate is arranged on the positive electrode bus bar 7;
(9) a negative electrode liquid absorbing plate is arranged on the negative electrode manifold piece 3;
(10) the positive liquid absorbing plate is in physical contact with the large liquid absorbing rod and the small liquid absorbing rod, and the negative liquid absorbing plate is also in physical contact with the large liquid absorbing rod and the small liquid absorbing rod, so that a network for absorbing electrolyte and storing the electrolyte is formed;
(11) welding the positive electrode cover plate 8 and the positive electrode bus bar 7;
(12) placing the assembled winding core group into the metal shell 4, and welding and sealing the positive cover plate 8 and the metal shell 4;
(13) welding the negative electrode cover plate 1 and the negative electrode bus bar 3;
(14) and finally, welding and sealing the negative electrode cover plate 1 and the metal shell 4.
(15) Drying the internal water;
(16) injecting liquid into the battery through the liquid injection port;
(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:
as shown in fig. 1, in the multi-pole high-capacity battery of the present application, 2 or 3 negative poles are disposed on a negative electrode cover plate 1; the shell is a positive pole, and a positive pole column is not arranged.
Example 2:
as shown in fig. 2, in the multi-terminal high-capacity battery of the present application, two positive terminals 10 are disposed on a positive cover plate 8; 2 cathode posts 9 are provided on the cathode cover plate 1.
Example 3
As shown in FIG. 3, in the multi-pole high-capacity battery of the present application, 2 positive poles 10 and 2 negative poles 9 are all disposed on the negative electrode cover plate 1, and the positive electrode cover plate 8 is not provided with a pole.
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 high-capacity battery with a multi-pole column is characterized by comprising a metal shell, a non-polar lug cylindrical winding core, a positive cover plate, a negative cover plate, a positive bus sheet, a negative bus sheet, a liquid absorbing assembly and a battery bracket; the liquid absorption component comprises a large liquid absorption rod, a small liquid absorption rod and a liquid absorption plate, and the small liquid absorption rod can be placed in the center of the winding core in advance when the winding core is manufactured in order to ensure that the small liquid absorption rod is tightly matched with the winding core; the large liquid absorbing rod is arranged between the metal cylinders of the cylindrical winding cores without the polar ears; the liquid suction plate is positioned between the cover plate and the confluence plate; the large liquid absorption rod, the small liquid absorption rod and the liquid absorption plate are in physical contact, and form a large network for absorbing electrolyte and storing the electrolyte together, and the ear-free cylindrical roll core consists of a roll core body and a metal cylinder wrapping the roll core body; one end of the cylindrical winding core without the lug is a positive electrode substrate, and the other end of the cylindrical winding core without the lug is a negative electrode substrate; a plurality of lug-free cylindrical winding cores are arranged in the metal shell, the positive electrode substrate of each lug-free cylindrical winding core is welded with the positive electrode bus sheet, the negative electrode substrate of each lug-free cylindrical winding core is welded with the negative electrode bus sheet, and the lug-free cylindrical winding cores are welded into a winding core group; the negative electrode end fixes the cylindrical winding cores without lugs by using a battery bracket, and the battery bracket is clamped between the cylindrical winding cores without lugs; the upper position in the axial direction is limited by an insulating heat conducting sheet and a negative cover plate, and the lower position in the axial direction is limited by a metal cylinder; the positive electrode substrate, the positive electrode bus bar and the metal cylinder at the positive electrode end of the lug-free cylindrical winding core are welded; and the anode cover plate and the cathode cover plate are provided with a plurality of poles, and the cathode cover plate is provided with a liquid injection port and an explosion-proof valve.
2. The multi-pole high-capacity battery according to claim 1, wherein at least 2 negative electrode poles are provided on the negative electrode cap plate; the shell is a positive pole, and a positive pole column is not arranged.
3. The multi-pole high capacity battery of claim 1, wherein at least 2 positive poles are provided on the positive cover plate; at least 2 negative pole utmost point posts set up at the negative pole apron.
4. The multi-pole high-capacity battery according to claim 1, wherein at least 2 positive poles and at least 2 negative poles are disposed on the negative electrode cover plate, and the positive electrode cover plate is not provided with poles.
5. The multi-pole large-capacity battery according to any one of claims 1 to 4, wherein the shape of the metal case is not limited to a cylindrical shape or a square shape, and can be designed into any desired shape.
6. The multi-pole large-capacity battery according to any one of claims 1 to 4, wherein the non-polar-lug cylindrical winding core is composed of positive and negative poles of the same system as follows: any one of lithium iron phosphate-graphite roll core, lithium manganate-graphite roll core, nickel cobalt lithium manganate-graphite roll core, lithium cobaltate-lithium titanate roll core, lithium manganate-lithium titanate roll core, supercapacitor roll core, metal hydride-nickel roll core, cadmium-nickel roll core and zinc-nickel roll core chemical power supply, and is not limited to the above system.
7. The multi-pole high-capacity battery according to any one of claims 1 to 4, wherein the poleless cylindrical winding cores can be combined with poleless cylindrical winding cores of different material systems as follows: the lithium manganate-graphite roll core is combined with a nickel cobalt lithium manganate-graphite roll core, and the power type super capacitor roll core is combined with an energy type lithium ion roll core made of the same type of positive electrode material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020592685.4U CN211858726U (en) | 2020-04-20 | 2020-04-20 | High-capacity battery with multi-pole columns |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020592685.4U CN211858726U (en) | 2020-04-20 | 2020-04-20 | High-capacity battery with multi-pole columns |
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| Publication Number | Publication Date |
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| CN211858726U true CN211858726U (en) | 2020-11-03 |
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| CN202020592685.4U Active CN211858726U (en) | 2020-04-20 | 2020-04-20 | High-capacity battery with multi-pole columns |
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Effective date of registration: 20230411 Address after: Room 1602, 16th Floor, High Definition Media Building, No. 28 South Tiancheng Road, High Speed Rail New City, Xiangcheng District, Suzhou City, Jiangsu Province, 215133 Patentee after: Suzhou Yuan'an Energy Technology Co.,Ltd. Address before: Room b275, exhibition hall, 1st floor, 11 Guotai Road, Yangpu District, Shanghai, 200433 Patentee before: Shanghai binei Information Technology Co.,Ltd. |