CN108417885B - Method for constructing composite pole of aluminum-shell power lithium ion battery and sealing composite glass - Google Patents
Method for constructing composite pole of aluminum-shell power lithium ion battery and sealing composite glass Download PDFInfo
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- CN108417885B CN108417885B CN201810154545.6A CN201810154545A CN108417885B CN 108417885 B CN108417885 B CN 108417885B CN 201810154545 A CN201810154545 A CN 201810154545A CN 108417885 B CN108417885 B CN 108417885B
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses a method for constructing a composite pole of an aluminum shell power lithium ion battery and sealing composite glass, wherein the composite pole comprises two forms: the composite glass sealing method relates to a heat-resistant gasket, a sealing cover plate with a step-shaped or cylindrical opening, composite sealing glass, a powder bed which is arranged between the heat-resistant gasket and the composite sealing glass and can not be sintered, and a hot-pressing sealing mode after the heat-resistant gasket and the composite sealing glass are assembled; the patent adopts the reinforcing toughening agent or the filler, so that the thermal shock resistance and the mechanical shock resistance of the phosphate or titanate glass are improved. In addition, the heterogeneous composite electrode is adopted, so that a compression type sealing mode is formed between the heterogeneous composite electrode, the composite sealing glass and the aluminum or aluminum alloy battery shell, and the cracking resistance of the composite glass in a compression stress state and the electric insulation airtightness of the battery electrode sealing piece are ensured.
Description
Technical Field
The invention belongs to the technical field of batteries, and particularly relates to a method for constructing a composite pole of an aluminum-shell power lithium ion battery and sealing composite glass.
Background
The electric automobile does not need to burn gasoline, and is one of the development directions of green and environmental protection, and in fact, the development of the automobile is developing towards the electromotion and intellectualization directions. The power source of an electric vehicle is a rechargeable lithium ion battery, and important components of the rechargeable lithium ion battery include a positive electrode, a negative electrode, a separator, an electrolyte (liquid), and a package of the battery cell. The academic and industrial circles have focused attention on electrode materials, separator materials and electrolyte materials in order to improve the energy density, charge and discharge performance and the like of lithium ion batteries, but do not pay enough attention to the sealing technology of the positive electrode pole and the negative electrode pole of the batteries with regard to the safety and the service life of the batteries. The sealing of lithium ion batteries is important because the existing electrolytes are severely corrosive: the electrolyte of lithium ion batteries is generallyIs a lithium hexafluorophosphate (LiPF)6) If water or water vapor outside the battery permeates into the battery and is mixed with the electrolyte, a hydrofluoric acid (HF) solution can be formed, battery parts are seriously corroded, and short circuit and even explosion accidents are caused; if the electrolyte leaks out of the surface of the battery, external water or moisture in the air may also react with the electrolyte, seriously damaging the battery, and causing fatal bad effects on the safety and service life of the automobile.
The existing plastic sealing is not resistant to temperature, is easy to corrode and age, has poor temperature change resistance, is not resistant to vibration, has short service life, and is easy to leak due to no chemical bond combination on an interface; when the metallized ceramic is sealed, the ceramic and the metal are difficult to weld, the metallized material is not corrosion resistant, the ceramic is fragile, residual thermal stress is generated in the welding process, the reliability, the stability and the service life of a sealing part are damaged due to corrosion and interface thermal stress, and in addition, the defect of complex manufacturing process is also caused; the existing sealing glass has the problem of poor thermal shock resistance and mechanical shock resistance, and therefore a method for constructing a composite pole of an aluminum-shell power lithium ion battery and sealing the composite glass is provided.
Disclosure of Invention
The invention aims to provide a method for constructing a composite pole of an aluminum-shell power lithium ion battery and sealing composite glass, which aims to solve the problems that the existing plastic sealing in the background technology is not temperature-resistant, is easy to corrode and age, has poor temperature change resistance, is not resistant to vibration, short in service life and easy to leak due to no chemical bond combination on an interface; when the metallized ceramic is sealed, the ceramic and the metal are difficult to weld, the metallized material is not corrosion resistant, the ceramic is fragile, residual thermal stress is generated in the welding process, and the reliability, the stability and the service life of a sealing part are damaged due to corrosion and interface thermal stress, and in addition, the defect of complex manufacturing process is also caused; and the existing sealing glass has the problems of poor thermal shock resistance and mechanical shock resistance.
In order to achieve the purpose, the invention provides the following technical scheme: a method for constructing a composite pole of an aluminum-shell power lithium ion battery and sealing composite glass comprises the step of penetrating a prefabricated temperature-resistant gasket outside the poleCovering the terminal post with a sleeve, placing on the bottom plate surface of the terminal post, placing and fixing a cylindrical sealing cover plate with a sealing clamp (such as a clamp made of graphite), wherein the temperature-resistant gasket can be glass, glass ceramic, or other glass or ceramic matrix composite material, has a softening temperature higher than the sealing temperature of the sealing glass, and has a thermal expansion coefficient higher than 15x10-6The cross section of the material can be square, rectangular or stepped, the inner diameter of the material can be as small as the inner surface is contacted with the surface of the maximum outer diameter of the pole or the outer sleeve of the pole, or the inner diameter of the material can be as large as the outer surface of the material is flush with the outer surface of the bottom plate of the pole, and ceramic/glass powder which cannot be sintered at the sealing temperature, such as aluminum oxide (A1), is filled, compacted and flattened on one part of the surface of the heat-resistant gasket203) And quartz powder (Si 0)2) Boron Nitride (BN), or graphite powder, among others, wherein one of the roles of the non-sinterable ceramic/glass powder is to reduce or relieve interfacial thermal stress. Then, placing a ring-shaped powder bed preform on the ceramic/glass powder bed, as mentioned above, the glass is added with second-phase glass or/and ceramic particles for the purpose of improving the strength and toughness of the glass, or crack resistance, while the addition of the second-phase reinforcing toughening agent can increase the sintering or sealing temperature of the glass, and in order to eliminate the adverse effect, a hot-press sealing method can be adopted, so that the glass-based composite material can achieve hermetic sealing of the battery pole at a lower temperature, for example, a method of using a weight block and a pressing rod or a pressing ring, wherein the ring-shaped block has electrical insulation and non-wetting or non-sticking glass with the glass, such as Boron Nitride (BN), graphite (which is cleaned later, such as by using treatment), corundum powder, etc., the pressing rod(s) or the pressing ring can be a weight to provide sand blasting, and can be a rod or a ring for transmitting external pressure, it is required to have sufficient density and heat resistance such as stainless steel, zirconia, etc. and after assembly, the oxidation resistant positive electrode terminal assembly to be sealed is sent to a muffle furnace or chain furnace or other furnace to be sealed in air, the sealing temperature is less than 600 ℃, the sealing time in the high temperature region is less than 1 hour, and for the negative electrode of copper or copper alloy containing base plate which is not oxidation resistantSealing the pole, pre-oxidizing at a temperature lower than 300 deg.C, and then sealing in an atmosphere (such as nitrogen N)2) And sealing under the protection condition, wherein the highest temperature is lower than 600 ℃, and the sealing time in a high-temperature area is less than 1 hour, and finally, a sealing member of the battery electrode is obtained.
Preferably, the electrode post comprises an outer sleeve sleeved on the aluminum or aluminum alloy core column, the outer surface of the outer sleeve is cylindrical, the inner surface of the outer sleeve is cylindrical or preferably conical, the outline of the outer surface of the outer sleeve can be concave-convex or other surface outlines beneficial to improving the interface bonding area, such as corrugated, the size of the outer sleeve can be unlimited, the electrode post can be a positive electrode post or a negative electrode post, the material of the outer sleeve can be aluminum alloy, aluminum-based composite material including aluminized silicon carbide or other materials with the thermal expansion coefficient of 17-20x10-6Metal or metal matrix composite material at/deg.C, the outer sleeve is partially or completely wrapped by a bed of sealing glass or glass ceramic or powder.
Preferably, the electrode post may further include at least one aluminum alloy (including silicon aluminum alloy) or aluminum-based composite material (such as aluminized silicon carbide, aluminum oxide, and the like) cylindrical section, the size of which is not limited, and the outer surface of which may have protrusions and recesses or other profiles that are beneficial to increase the bonding area. And the heterogeneous composite material electrode pole (containing one or more of aluminum, aluminum alloy, aluminum-based composite material, copper and copper alloy) formed by the cylindrical section can be a positive pole or a negative pole.
Compared with the prior art, the invention has the beneficial effects that:
(1) the sealing structure has better air tightness than a plastic mechanical pressing sealing technology, because a bonding interface has chemical bonds and sealing glass has compressive stress, and simultaneously, the glass has better weather resistance than plastic;
(2) compared with the ceramic metallization sealing technology, the technology is simpler, the problem that the metallization material cannot resist electrolyte corrosion is solved, and the problem that the interface is cracked due to overlarge (tensile) stress caused by great difference of thermal expansion coefficients is solved;
(3) the reinforcing toughening agent is adopted, so that the thermal shock resistance and the mechanical shock resistance of low-temperature sealing glass such as phosphate or titanate are greatly improved compared with the prior similar sealing glass;
(4) the heterogeneous composite electrode is adopted, so that a compression type sealing mode is formed between the heterogeneous composite electrode, the composite sealing glass and the aluminum or aluminum alloy battery shell, and the cracking resistance of the glass in a compressive stress state and the air tightness of an electrode sealing piece are guaranteed.
Drawings
FIG. 1 is a schematic view of an electrode seal according to the present invention;
FIG. 2 is a schematic structural view of the post composite design of the present invention;
FIG. 3 is a schematic diagram of a second structure of the composite design of the post of the present invention;
FIG. 4 is a schematic diagram of a third structure of the composite design of the terminal post of the present invention;
in the figure: 112-pole jacket, 110-pole, 160-pressure ring, 150-annular briquetting, 120-cylindrical sealing cover plate, 130-ceramic \ glass powder, 131-temperature resistant gasket, 212-sleeve, 210-pole, 221-sealing ring cover, 220-cover plate, 210-1-bottom plate, 230-powder bed, 231-temperature resistant gasket, 312-sleeve, 310-pole, 321-sealing ring cover, 320-planar battery cover plate, 310-1-planar bottom plate, 330-powder bed, 331-temperature resistant gasket and 440-2-cylindrical section.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: a method for constructing a composite pole of an aluminum-shell power lithium ion battery and sealing composite glass comprises the steps of enabling a prefabricated temperature-resistant gasket 131 to penetrate through a pole jacket 112, placing the gasket on the upper surface of a bottom plate of a pole 110, placing the gasket and fixing a partial cylindrical sealing clamp (such as a clamp made of graphite material) by using a sealing clampThe cover plate 120 and the temperature-resistant gasket 131 may be glass, glass-ceramic, or other glass or ceramic matrix composite materials having a softening temperature higher than the sealing temperature of the sealing glass and a coefficient of thermal expansion higher than 15x10-6a/deg.C, and has sufficient chemical stability against electrolyte corrosion, and its cross-sectional shape can be square, rectangular or stepped, its inner diameter can be so small that its inner surface contacts with the surface of the maximum outer diameter of the pole, or so large that its outer surface is flush with some outer surface of the base plate of the pole, and on a part of the surface of the temperature-resistant gasket 131, a ceramic/glass powder 130, such as alumina A1, which is non-sinterable at the sealing temperature and is used to eliminate the thermal stress at the interface, is filled and compacted and flattened203. Quartz powder Si02Boron nitride BN or graphite powder, etc., and then placing an annular powder bed preform on the ceramic/glass powder 130 powder bed, as previously mentioned, with second phase glass or/and ceramic particles added to the glass for the purpose of improving the strength and toughness of the glass, or resistance to cracking, while the addition of a second phase reinforcing toughening agent increases the sintering or sealing temperature of the glass, and to eliminate this adverse effect, a hot press sealing method may be used to hermetically seal the battery terminal at a lower temperature with the glass-based composite material, such as a method of applying pressure to a weight block, where the annular pressure block 150 is electrically insulating and non-wetting or non-sticking glass to the glass, such as boron nitride BN, graphite (cleaned later, e.g., by sand blasting), corundum powder, etc., and the pressure rod(s) or pressure ring 160 may be a weight to provide gravity, or a pressure-transmitting rod or a pressure-transmitting ring, which is required to have enough density and heat resistance such as stainless steel, zirconia and the like, after assembly, the anode pole component to be sealed and oxidized is sent to a muffle furnace or a chain furnace or other furnaces to be sealed and sealed in the air, the sealing highest temperature is less than 600 ℃, and the sealing time in a high-temperature region is less than 1 hour; for sealing the negative electrode pole of the copper or copper alloy base plate which is not oxidation-resistant, the sealing is required to be pre-oxidized at the temperature of less than 300 ℃ and then be carried out in the atmosphere (such as nitrogen N)2) Sealing under protection conditions at a maximum temperature of less than 600 ℃ and a sealing time in the high temperature region of less than 1 hour, andand then obtaining the battery electrode sealing member.
In order to facilitate insulation and air tightness, in this embodiment, preferably, the electrode post 110 includes an outer sleeve sleeved on the aluminum or aluminum alloy post, the outer surface of the outer sleeve is cylindrical, the inner surface of the outer sleeve is cylindrical or conical, the outer surface may be concave-convex or other contours beneficial to improving the interface bonding area, the size of the outer sleeve is not limited, the electrode post may be a positive electrode post or a negative electrode post, and part or all of the outer sleeve is wrapped by sealing glass, glass ceramic or a powder bed.
In order to facilitate insulation and airtightness, in this embodiment, the electrode post 110 may further include at least one aluminum alloy or aluminum-based composite cylindrical section, which has a size that is not limited, and the outer surface of the electrode post may have a concave-convex shape or other contours that are beneficial for increasing the bonding area. And the heterogeneous composite material electrode pole formed by the cylindrical section can be a positive pole or a pole.
The composite design scheme of the pole 110 in the invention is as follows:
1. referring to fig. 2, a copper or copper alloy base plate 210-1 with a tapered step and a conical pole 210 with an attached aluminum or aluminum alloy cone, wherein a portion of the copper or copper alloy step and a substantial portion of the attached aluminum or aluminum alloy cone are tightly wrapped by an aluminum alloy or aluminum-based composite material sleeve 212 with a low coefficient of thermal expansion, if the contact surface between the sleeve 212 and the pole 210 is not airtight, the sleeve 212 and the pole 210 can be welded or brazed together to form an airtight interface or contact surface. It should be noted that the conical surface of the conical pole is to form an airtight interface or a contact surface with the sleeve 212 by cold pressing or shrink fit. The copper-aluminum bimetal pole is used for replacing copper with aluminum, so that the purposes of reducing cost and weight are achieved, and the requirement of the cathode electrochemistry of the lithium ion battery on the copper is met. On the other hand, the entire planar plate-shaped battery cover 220 has at least one opening, and a sealing ring cover 221 made of the same material as the cover or having a similar thermal expansion coefficient to the cover is stacked on the outer surface of the cover at the opening, and may be simply stacked on the outer surface of the cover, or mechanically defined by a step on the cover or may be soldered or welded to the cover. A temperature resistant gasket 231, which may be glass, glass ceramic, or even plastic, or an electrically insulating composite material, is provided between the post ceramic base plate and the battery cover plate and at the periphery of the post, and has a cross-sectional shape of square, rectangular, or stepped, and has an inner diameter that is small enough to allow the inner surface to contact the surface of the maximum outer diameter of the post, or large enough to allow the outer surface to be flush with a certain outer surface of the post base plate. The temperature resistant gasket is at least 100 ℃ higher than the sealing glass and preferably has a coefficient of thermal expansion not much less than that of the glass, and preferably close to that of the glass. The poles (210 and 210-1) and the sleeve 212, the cover plate 220, the sealing ring cover 221 and the temperature-resistant gasket 231 are sealed by glass, glass ceramic or composite glass materials (laminated composite or dispersion composite type) as electric insulation and air tightness. Similarly, in order to eliminate the interface thermal stress, the ceramic/glass powder 230 which is not sinterable at the sealing temperature should be filled, compacted and pressed in the area enclosed by the composite glass, the electrode post base plate and the temperature-resistant gasket. In order to improve the firmness of the pole sealing structural part, plastic clamping plates or covering layers are adopted at two sides of the cover plate around the pole.
2. Referring to fig. 3, a circular pole 310 made of aluminum or aluminum alloy (such as 1060 or 3003) and having a planar bottom plate 310-1 has two sections with different outer diameters, wherein a sleeve 312 made of aluminum alloy or aluminum-based composite material with a low thermal expansion coefficient is sleeved outside the section with a small outer diameter, and if the contact surface between the sleeve 312 and the pole 310 is not airtight, the sleeve 312 and the pole 310 can be welded or brazed together to form an airtight interface. On the other hand, the entire planar battery cover plate 320 has at least one opening, and a sealing ring cover 321 made of the same material as the cover plate or having a similar thermal expansion coefficient is stacked on the outer surface of the cover plate at the opening, and may be simply stacked on the outer surface of the cover plate, or mechanically defined by a step on the cover plate or fixed to the cover plate or soldered or welded to the cover plate. Between the terminal base plate and the battery cover plate and at the periphery of the terminal there is a temperature resistant gasket 331, which may be glass, glass ceramic, even plastic, or electrical insulating composite material, whose cross-section may be square, rectangular or stepped, whose inner diameter may be so small that the inner surface contacts the surface of the maximum outer diameter of the terminal, or so large that its outer surface is flush with some outer surface of the terminal base plate. The temperature resistant gasket is at least 100 ℃ higher than the sealing glass and preferably has a coefficient of thermal expansion not much less than that of the glass, and preferably close to that of the glass. The pole 310 and the sleeve 312 are sealed with the cover plate 320 and the sealing ring cover 321 by using glass, glass ceramic or powder bed (layered composite or dispersion composite type) as electrical insulation and gas tightness. Similarly, in order to eliminate the interface thermal stress, the ceramic/glass powder 330 that is not sinterable at the sealing temperature should be filled, compacted and pressed in the area surrounded by the composite glass, the electrode post base plate and the temperature-resistant gasket. In order to improve the firmness of the pole sealing structural part, plastic clamping plates or covering layers are adopted at two sides of the cover plate around the pole.
3. Referring to fig. 4, a circular pole 310 of aluminum or aluminum alloy (such as 1060 or 3003) with a planar base plate 310-1 has a cylindrical section 410-2 of heterogeneous material, which is an aluminum alloy or aluminum-based composite material with a low coefficient of thermal expansion, matching the coefficient of thermal expansion of the composite glass, and is joined to other pole sections in a gas-tight manner. On the other hand, the entire planar battery cover plate 320 has at least one opening, and a sealing ring cover 321 made of the same material as the cover plate or having a similar thermal expansion coefficient is stacked on the outer surface of the cover plate at the opening, and may be simply stacked on the outer surface of the cover plate, or mechanically defined by a step on the cover plate or fixed to the cover plate or soldered or welded to the cover plate. Between the terminal base plate and the battery cover plate and at the periphery of the terminal there is a temperature resistant gasket 331, which may be glass, glass ceramic, even plastic, or electrical insulating composite material, whose cross-section may be square, rectangular or stepped, whose inner diameter may be so small that the inner surface contacts the surface of the maximum outer diameter of the terminal, or so large that its outer surface is flush with some outer surface of the terminal base plate. The temperature resistant gasket is at least 100 ℃ higher than the sealing glass and preferably has a coefficient of thermal expansion not much less than that of the glass, and preferably close to that of the glass. The pole 310, the cylindrical section 410-2, the cover plate 320 and the sealing ring cover 321 are sealed and connected by glass, glass ceramic or powder bed (laminated composite or dispersion composite type) as electric insulation and air tightness. Similarly, in order to eliminate the interface thermal stress, the ceramic/glass powder 330 that is not sinterable at the sealing temperature should be filled, compacted and pressed in the area surrounded by the composite glass, the electrode post base plate and the temperature-resistant gasket. In order to improve the firmness of the pole sealing structural part, plastic clamping plates or covering layers are adopted at two sides of the cover plate around the pole.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The method for constructing the composite pole of the aluminum shell power lithium ion battery and sealing the composite glass is characterized in that:
the electrode comprises a heterogeneous composite electrode pole, a glass or glass ceramic or ceramic-based heat-resistant gasket, composite sealing glass, a non-sinterable ceramic/glass powder bed between the heat-resistant gasket and the composite sealing glass, an aluminum or aluminum alloy sealing cover plate with a step-type opening, and a hot-press sealing mode after the heterogeneous composite electrode pole, the glass or glass ceramic or ceramic-based heat-resistant gasket, the composite sealing glass, the aluminum or aluminum alloy sealing cover plate with the step:
penetrating a heat-resistant gasket which is processed in advance through an outer sleeve of the composite electrode pole and placing the heat-resistant gasket on the upper surface of a bottom plate of the composite electrode pole;
then placing and fixing a local or integral sealing cover plate by using a sealing clamp, wherein the sealing cover plate is provided with a cylindrical central hole; filling and flattening a ceramic/glass powder bed that is non-sinterable at the sealing temperature on a portion of the upper surface of the heat resistant gasket or in the accessory area;
then, the annular composite glass material prefabricated body is placed on a ceramic/glass powder bed, and then an electrode glass sealing process under a pressure condition is carried out under a proper oxidizing or protective atmosphere, so that the composite glass material can finish the electric insulation airtight sealing of the battery pole.
2. The method for constructing the composite pole of the aluminum-shell power lithium ion battery and sealing the composite glass according to claim 1, which is characterized in that:
the composite electrode pole is composed of an aluminum or aluminum alloy core column, the outer surface of the composite electrode pole is sleeved with an outer sleeve, the outer surface of the outer sleeve is cylindrical, the inner surface of the outer sleeve is conical, the outline of the outer surface of the outer sleeve is concave-convex or corrugated, the size or length and size of the outer sleeve are not limited, the outer sleeve is made of aluminum alloy, copper or copper alloy or copper-impregnated silicon carbide and aluminum-based composite material,
the electrode pole and the outer sleeve are hermetically packaged, and part or all of the outer sleeve is coated by sealing glass, glass ceramic or composite glass material.
3. The method for constructing the composite pole of the aluminum-shell power lithium ion battery and sealing the composite glass according to claim 2, wherein the method comprises the following steps: the outer sleeve is made of aluminized silicon carbide or has a thermal expansion coefficient of 17-20x10-6Metallic stainless steel between/° c.
4. The method for constructing the composite pole of the aluminum-shell power lithium ion battery and sealing the composite glass according to claim 2, wherein the method comprises the following steps: the aluminum alloy is a silicon-aluminum alloy; the electrode post is a positive electrode post or a negative electrode post of the battery.
5. The method for constructing the composite pole of the aluminum-shell power lithium ion battery and sealing the composite glass according to claim 4, wherein the method comprises the following steps: the aluminum alloy is a silicon-aluminum alloy; the aluminum-based composite material is aluminized silicon carbide or aluminized aluminum oxide.
6. The method for constructing the composite pole of the aluminum-shell power lithium ion battery and sealing the composite glass according to claim 1, which is characterized in that:
when hot press sealing is carried out, a method for applying pressure comprises the steps of adopting an annular heavy weight pressing block and a plurality of pressure rods, wherein the annular heavy weight pressing block has electrical insulation and non-wetting property with glass or non-sticking glass, and comprises Boron Nitride (BN), graphite and corundum powder;
the plurality of compression bars or compression rings are heavy objects for providing gravity, or stainless steel or zirconia bars or rings for transmitting external pressure;
in order to carry out hot-press sealing, the anode pole terminal assembly to be subjected to hot-press sealing and oxidation resistance is sent to a muffle furnace or a chain furnace or other furnaces to be sealed in the air; the highest sealing temperature is less than 600 ℃; the sealing time in the high temperature region is less than 1 hour, and for the sealing of the negative electrode pole of the copper or copper alloy containing base plate which is not oxidized, the pre-oxidation is required to be carried out at the temperature of less than 300 ℃ during the sealing, then the sealing is carried out under the condition that the maximum temperature is less than 600 ℃ and the sealing time in the high temperature region is less than 1 hour under the protection of nitrogen atmosphere, and finally the required sealing piece for the positive and negative electrodes of the lithium ion battery is obtained.
7. The method for constructing the composite pole of the aluminum-shell power lithium ion battery and sealing the composite glass according to claim 1, which is characterized in that:
the air tightness composite process between the aluminum or aluminum alloy core column and the aluminum alloy outer sleeve, the copper or copper alloy or copper-infiltrated silicon carbide and the aluminum-based composite material of the composite electrode pole is used independently or in combination with the following processes:
mechanically pressing, utilizing surplus matching of expansion with heat and contraction with cold, and welding, wherein the welding comprises brazing, laser welding, resistance welding, electron beam welding and microwave welding; wherein the brazing is the simultaneous melting and sealing of the sealing glass and the brazing solder before or in the sealing of the composite glass.
8. The method for constructing the composite pole of the aluminum-shell power lithium ion battery and sealing the composite glass according to claim 7, wherein the method comprises the following steps: the aluminum alloy includes a silicon aluminum alloy.
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| CN109301151B (en) * | 2018-11-01 | 2024-02-06 | 深圳中傲新瓷科技有限公司 | Battery electrode post glass sealing structure and sealing method thereof |
| CN109256499B (en) * | 2018-11-01 | 2023-08-11 | 深圳中傲新瓷科技有限公司 | Sealing assembly for sealing electrode post glass of aluminum shell power battery and sealing method thereof |
| CN112599834B (en) * | 2020-12-04 | 2022-08-23 | 广东微电新能源有限公司 | Battery with a battery cell |
| CN113991229B (en) * | 2021-10-25 | 2023-08-04 | 芜湖天弋能源科技有限公司 | Lithium battery pack and assembly device thereof |
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| JPH11120965A (en) * | 1997-10-20 | 1999-04-30 | Bl Engineering:Kk | Sealing method for electrode rod in aluminum sealing cover for battery |
| CN201629356U (en) * | 2010-01-29 | 2010-11-10 | 蚌埠市立群电子有限公司 | Special cover group for column-type lithium battery |
| CN103187544B (en) * | 2011-12-28 | 2015-07-22 | 比亚迪股份有限公司 | Negative electrode seal assembly of battery and manufacturing method thereof, and lithium ion battery |
| US9564643B2 (en) * | 2013-07-24 | 2017-02-07 | Ut-Battelle, Llc | Engineered glass seals for solid-oxide fuel cells |
| CN103695827B (en) * | 2014-01-06 | 2016-11-02 | 钢铁研究总院 | A kind of method eliminating high-temperature alloy material high temperature hardening break |
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2018
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Address after: 518107 plant 1207, zhongkono Digital Technology Industrial Park, No. 7 Road, east of Guangming high tech park, Tianliao community, Yutang street, Guangming District, Shenzhen, Guangdong Patentee after: Shenzhen Zhongao new porcelain Technology Co.,Ltd. Address before: 518106 701, 7th floor, building B, quanju Industrial Zone, Shiwei village, Matian street, Guangming New District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN SIALOM ADVANCED MATERIALS Co.,Ltd. |