CN113871787A - Steel shell lithium battery provided with spiral linear explosion-proof valve and manufacturing method thereof - Google Patents
Steel shell lithium battery provided with spiral linear explosion-proof valve and manufacturing method thereof Download PDFInfo
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- CN113871787A CN113871787A CN202110970824.1A CN202110970824A CN113871787A CN 113871787 A CN113871787 A CN 113871787A CN 202110970824 A CN202110970824 A CN 202110970824A CN 113871787 A CN113871787 A CN 113871787A
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 73
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 73
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 43
- 239000010959 steel Substances 0.000 title claims abstract description 43
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 239000003292 glue Substances 0.000 claims description 13
- 238000010892 electric spark Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 5
- 239000003792 electrolyte Substances 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 7
- 238000004880 explosion Methods 0.000 abstract description 7
- 230000002265 prevention Effects 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000002547 anomalous effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
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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
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/172—Arrangements of electric connectors penetrating the casing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
-
- 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
-
- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Gas Exhaust Devices For Batteries (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses a steel shell lithium battery with a spiral linear explosion-proof valve and a manufacturing method thereof, wherein the steel shell lithium battery comprises a shell, a sealed space is formed inside the shell, and a battery core is arranged in the shell; the battery cell is connected with the positive electrode shell through a positive electrode tab and is connected with the negative electrode shell through a negative electrode tab; the linear explosion-proof valve is arranged on the positive electrode shell or the negative electrode shell, surrounds the positive electrode shell or the negative electrode shell and is spiral; the invention is equivalent to that a plurality of small explosion-proof valves are arranged at different positions and different angles of the whole steel shell lithium battery, thereby improving the safety and the explosion-proof effect of the steel shell lithium battery and effectively avoiding greater safety problems caused by battery explosion.
Description
Technical Field
The invention relates to the technical field of steel-shell lithium batteries, in particular to a steel-shell lithium battery with a spiral linear explosion-proof valve and a manufacturing method thereof.
Background
In the prior art, in order to prevent explosion of a steel-shell lithium battery, an explosion-proof valve is usually arranged above or below a battery shell, and the explosion-proof valve can also be called as a safety valve; the pressure value that explosion-proof valve can bear is less than the pressure value that other positions of box hat lithium cell can bear, when box hat lithium cell internal pressure takes place unusually, when leading to internal pressure to rise to the certain degree unusually, explosion-proof valve will be oppressed by internal pressure and lead to explosion-proof valve to can make the internal pressure of box hat lithium cell obtain timely pressure release, prevent that box hat lithium cell internal pressure is too high and the explosion takes place.
Among the prior art, the shape of explosion-proof valve is O shape, C shape, cross or be a device alone, receives extrusion, inside or outside short circuit when the box hat lithium cell, and the high temperature inflation that leads to because the box hat lithium cell only single position is provided with explosion-proof valve, in the anomalous inflation of inside electric core or the removal in-process, inside electric core is probably blocked explosion-proof valve, and the explosion that often can take place explosion-proof valve inefficacy appears.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a steel shell lithium battery with a spiral linear explosion-proof valve and a manufacturing method thereof; the explosion-proof valve is equivalent to a plurality of small explosion-proof valves arranged at different positions and different angles of the whole steel shell lithium battery, so that the safety and the explosion-proof effect of the steel shell lithium battery are improved, and the greater safety problem caused by battery explosion can be effectively avoided.
In order to achieve the purpose, the invention provides a steel shell lithium battery provided with a spiral linear explosion-proof valve, which comprises a shell, wherein a sealed space is formed inside the shell and a battery core is arranged in the shell; the battery cell is connected with the positive electrode shell through a positive electrode tab and is connected with the negative electrode shell through a negative electrode tab; and the linear explosion-proof valve surrounds on the anode shell or the cathode shell and is in a spiral shape.
As another improvement of the invention, a spiral linear explosion-proof valve is engraved on the inner wall or the outer wall of the middle part of the positive electrode shell or the negative electrode shell, and the linear explosion-proof valve spirally extends around the central axis of the positive electrode shell or the negative electrode shell and continuously extends from one end of the positive electrode shell or the negative electrode shell to the other end; the method can be used for preventing the situation that the internal pressure of the side surface of the steel shell lithium battery is too high.
As another improvement of the invention, a spiral linear explosion-proof valve is engraved on the inner side or the outer side of the bottom or the top of the positive electrode shell or the negative electrode shell, and the linear explosion-proof valve extends outwards to the edge in a spiral shape from the center of the bottom or the top of the positive electrode shell or the negative electrode shell, so that the situation that the internal pressure of the top or the bottom of the steel shell lithium battery is too high can be prevented, and the prevention and the protection without dead angles in all directions can be realized.
As another improvement of the invention, the positive electrode shell or the negative electrode shell is cylindrical, and the steel shell lithium battery is also cylindrical and is a cylindrical battery; the positive electrode shell or the negative electrode shell can also be a cuboid, and the steel shell lithium battery is a square battery.
As another improvement of the invention, the linear explosion-proof valve is a continuous groove or a convex groove; dotted or broken line type grooves or convex grooves; the continuous grooves or the continuous convex grooves are beneficial to preventing the pressure inside the steel-shell lithium battery from being overhigh in all directions, but the cost is higher; the dotted or broken line type groove or convex groove can prevent the internal pressure of the steel shell lithium battery from being too high at a key position, the cost is lower, and the strength of the steel shell lithium battery is better.
As another improvement of the invention, the linear explosion-proof valve is provided with at least two line segments with different depths, and a plurality of threshold values are arranged, so that multiple protection can be performed, and the safety of the steel shell lithium battery is further enhanced.
As another improvement of the invention, at least two linear explosion-proof valves are arranged; at least two of the linear explosion-proof valves have different depths; or at least two of the linear explosion-proof valves have different depths and are arranged to cross each other.
As another improvement of the invention, the linear explosion-proof valve is stamped and printed with a spiral linear explosion-proof valve on the inner wall or the outer wall of the middle part of the anode shell or the cathode shell by using laser, electric spark or a die;
and/or a spiral linear explosion-proof valve is marked on the inner side or the outer side of the bottom or the top of the positive electrode shell or the negative electrode shell by using laser or electric spark or die stamping.
As another improvement of the present invention, the housing is made of a steel material member, an aluminum material member or a copper material member, and may be made of other materials.
The invention also provides a manufacturing method of the steel shell lithium battery with the spiral linear explosion-proof valve, which comprises the following steps:
step S1, manufacturing a cylindrical positive electrode case, the positive electrode case including a positive electrode bottom cap,
a spiral linear explosion-proof valve is stamped on the inner wall or the outer wall of the middle part of the positive electrode shell by using laser or electric spark or a die;
and/or a spiral linear explosion-proof valve is marked on the inner side or the outer side of the cap at the bottom of the anode by using laser or electric spark or die stamping;
step S2, manufacturing a negative electrode shell and a positive electrode top cap, wherein an insulating glue layer 3 for isolating and insulating the negative electrode shell and the positive electrode top cap is arranged between the negative electrode shell and the positive electrode top cap, and the negative electrode shell, the positive electrode top cap and the insulating glue layer 3 are bonded into a whole;
step S3, arranging a battery cell in the positive shell, wherein the battery cell is connected with the positive shell through a positive pole tab and is connected with the negative shell through a negative pole tab;
step S4, installing an electrolyte inside the positive electrode case; and the positive top cover cap and the positive shell are fixedly connected into a whole through welding to form the steel shell lithium battery.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the linear explosion-proof valve is arranged on the positive electrode shell or the negative electrode shell of the steel shell lithium battery, and the linear explosion-proof valve is wound on the positive electrode shell or the negative electrode shell in a spiral shape, so that a plurality of small explosion-proof valves in the prior art are arranged at different positions and different angles of the whole steel shell lithium battery, the safety and the explosion-proof effect of the steel shell lithium battery are improved, and the greater safety problem caused by battery explosion can be effectively avoided.
2. The linear explosion-proof valve generally adopts a continuous groove or a convex groove; adopt above-mentioned continuous type and spiral explosion-proof valve, can prevent the whole body of box hat lithium cell, tear uninstallation internal pressure and can effectively improve explosion-proof effect, but also can have the higher and too big problem of explosion-proof valve coverage area of cost, increased manufacturing cost to weaken the self intensity of box hat lithium cell, as an improvement of above-mentioned mode, linear explosion-proof valve can adopt punctiform, broken string formula recess or tongue, carries out intensive, key recess or tongue that sets up at the position that takes place pressure too high and inflation easily, when reduce cost, also helps the enhancement of box hat lithium cell self intensity, accomplishes key prevention and control and all-round combination of preventing and controlling.
3. The linear explosion-proof valve can be arranged on the inner wall or the outer wall of the middle part of the anode shell or the cathode shell, so that the condition that the internal pressure of the side surface of a steel shell lithium battery is too high can be prevented; or the linear explosion-proof valve is arranged at the bottom of the positive electrode shell or the negative electrode shell or on the inner side or the outer side of the top of the positive electrode shell or the negative electrode shell, so that the condition that the internal pressure of the top or the bottom of the steel shell lithium battery is too high can be prevented, and the all-round prevention and protection without dead angles are realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of the overall structure of a steel-shell lithium battery provided with a spiral linear explosion-proof valve according to the present invention;
FIG. 2 is a schematic diagram of a steel-shelled lithium battery provided with a spiral linear explosion-proof valve provided by the invention, which is divided on a positive electrode shell;
FIG. 3 is an exploded view of a steel-shelled lithium battery provided with a spiral linear explosion-proof valve according to the present invention;
fig. 4 is a bottom elevation view of a steel-shelled lithium battery provided with a spiral-type linear explosion-proof valve according to the present invention.
The figure includes:
1-shell, 11-anode shell, 12-cathode shell, 3-insulating glue layer and 4-linear explosion-proof valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are one embodiment of the present invention, and not all embodiments of the present invention. All other embodiments obtained by a person skilled in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.
Example one
Referring to fig. 1 to 4, a steel-shelled lithium battery provided with a spiral linear explosion-proof valve according to a first embodiment of the present invention is provided.
As shown in fig. 2, the steel-shell lithium battery includes a casing 1, wherein a sealed space is formed inside the casing 1, and a battery core is installed inside the casing; specifically, the battery cell is not shown in the drawings; further, the housing 1 is not only made of only a steel material member; may further include a member made of an aluminum material or a member made of a copper material; in the first embodiment, the material of the housing 1 is not limited, and other material members may be used.
As shown in fig. 3, in the present embodiment, the casing 1 includes a positive casing 11 and a negative casing 12, an insulating glue layer 3 is disposed between the positive casing 11 and the negative casing 12, and the positive casing 11 and the negative casing 12 are insulated and sealed by the insulating glue layer 3; the insulating glue layer 3 is arranged, so that the positive shell 11 and the negative shell 12 are not in contact with each other, and the insulating glue layer has an isolating and insulating effect, and can also enable the positive shell 11 and the negative shell 12 to form a closed space, and a battery core is arranged in the closed space to play a role in sealing.
Specifically, the battery cell is connected with the positive electrode shell 11 through a positive electrode tab and is connected with the negative electrode shell 12 through a negative electrode tab; specifically, welding is used for connection.
As shown in fig. 1, be equipped with linear explosion-proof valve 4 on the outer wall at anodal casing 11 middle part, linear explosion-proof valve 4 centers on anodal casing 11 and is spiral shape, all is equipped with the small-size explosion-proof valve among a plurality of prior art in the whole different positions of box hat lithium cell and different angles in other words, has improved the security and the explosion-proof effect of box hat lithium cell, can effectively avoid the bigger safety problem that arouses because of the battery explosion.
Furthermore, as shown in fig. 2 and 3, a spiral linear explosion-proof valve 4 is engraved on the inner wall of the middle part of the positive electrode shell 11, and the linear explosion-proof valve 4 spirally extends around the central axis of the positive electrode shell 11 and continuously extends from one end to the other end of the positive electrode shell 11; the device can be used for preventing the condition that the internal pressure of the side surface of the steel shell lithium battery is too high; similarly, the principle of replacing the positive electrode shell 11 with the negative electrode shell 12 is the same, and is not described herein, and the adaptive change can be made according to the actual production situation.
Further, as shown in fig. 4, a spiral linear explosion-proof valve 4 is engraved on the inner side of the bottom of the positive electrode shell 11, and the linear explosion-proof valve 4 extends outwards to the edge in a spiral shape from the center of the bottom of the positive electrode shell 11; similarly, the spiral linear explosion-proof valve 4 is marked on the inner side or the outer side of the bottom or the top of the negative electrode shell 12, the linear explosion-proof valve 4 extends to the edge outwards in a spiral manner from the center of the bottom or the top of the negative electrode shell 12, so that the situation that the internal pressure of the top or the bottom of a steel shell lithium battery is too high can be prevented, and all-round prevention and protection without dead angles are achieved.
As shown in fig. 1 to 3, the positive electrode case 11 is cylindrical, and the steel-shell lithium battery is also cylindrical and is a cylindrical battery; the positive electrode shell 11 can also be made into a cuboid and a square-shell lithium battery; the steel shell lithium battery can be made into batteries with other shapes according to the actual production and application conditions.
As shown in fig. 1 to 4, the linear explosion-proof valve 4 generally adopts a continuous groove or a continuous tongue; adopt above-mentioned continuous type and spiral explosion-proof valve 4, can prevent the whole body of box hat lithium cell, tear uninstallation internal pressure and can effectively improve explosion-proof effect, but also can have the problem that the cost is higher and explosion-proof valve coverage area is too big, increased manufacturing cost to weaken the self intensity of box hat lithium cell, as an improvement of above-mentioned mode, linear explosion-proof valve 4 can adopt punctiform, broken string formula recess or tongue, carries out intensive, key recess or tongue that sets up at the position that takes place too high pressure and inflation more easily, when reduce cost, also helps the enhancement of box hat lithium cell self intensity, accomplishes the combination of key prevention and control and all-round prevention and control.
As shown in fig. 1 to 4, the linear explosion-proof valve 4 is a continuous spiral linear explosion-proof valve 4, the linear explosion-proof valve 4 may have only one uniform depth, so that only one pressure threshold value may be controlled, and may have a plurality of line segments of different depths, so that different pressure threshold values may be controlled, a smaller threshold value may be set at a portion that is easily expanded, and a larger threshold value may be set at a portion that is not easily expanded, so that the strength of the steel-shelled lithium battery may be improved to a certain extent.
Further, the linear explosion-proof valve 4 is provided with two (or more) lines; and the two said linear explosion-proof valves 4 have different depths; controlling two different thresholds separately as described above; under the normal expansion condition, when the pressure in the steel shell lithium battery is continuously increased, the linear explosion-proof valve 4 with larger depth is firstly cracked; if the internal air pressure of the deeper linear explosion-proof valve 4 reaches the threshold value but cannot burst due to the fault, the pressure in the steel shell lithium battery is continuously increased, and when the internal air pressure reaches the second threshold value (or the third threshold value), the linear explosion-proof valve 4 with the smaller depth is continuously cracked; so, the box hat lithium cell has two at least different threshold values that burst, and multiple guarantee promotes the security performance of box hat lithium cell.
Further, the linear explosion-proof valve 4 is provided with two (or more) linear explosion-proof valves; and the two said linear explosion-proof valves 4 have different depths; meanwhile, the two linear explosion-proof valves 4 are arranged in parallel; this may further cover the scope of protection, but the cost is also higher; as a further improvement, the two linear explosion-proof valves 4 can also be arranged in a crossed manner, the protection range is enlarged, the strength of a node at the crossed position is lower, the control threshold value is lower, the linear explosion-proof valves are easier to break, the explosion-proof capacity of the steel shell lithium battery is further improved, and the safety performance is further improved.
The linear explosion-proof valve 4 is characterized in that a spiral linear explosion-proof valve 4 is stamped on the inner wall or the outer wall of the middle part of the anode shell 11 or the cathode shell 12 by using laser or electric spark or a die;
and/or the spiral type linear explosion-proof valve 4 is marked on the inner side or the outer side of the bottom or the top of the positive electrode shell 11 or the negative electrode shell 12 by punching with laser or electric spark or a die.
Example two
Referring to fig. 1 to 4, a second embodiment of the present invention provides a method for manufacturing a steel-shelled lithium battery with a spiral linear explosion-proof valve as described above.
The method comprises the following steps:
step S1, manufacturing a cylindrical positive electrode shell 11, where the positive electrode shell 11 includes a positive electrode bottom cap, so that the positive electrode shell 11 encloses an open container with an open upper end and a closed lower end, which is beneficial for containing articles, and specifically, can contain an electric core and an electrolyte; the positive electrode case 11 may be formed by press molding.
Further, the linear explosion-proof valve 4 is manufactured; the depth of the linear explosion-proof valve 4 can be calculated according to actual production, and the depth of the linear explosion-proof valve 4 can be multiple; a spiral linear explosion-proof valve 4 is stamped on the inner wall or the outer wall of the middle part of the anode shell 11 by laser or electric spark or a die;
and/or a spiral linear explosion-proof valve 4 is marked on the inner side or the outer side of the cap at the bottom of the positive electrode by using laser or electric spark or die stamping;
further, the linear explosion-proof valve 4 may be processed by other methods, and is not limited to the above processing method.
Step S2, manufacturing a negative electrode shell 12 and a positive electrode top cap, wherein an insulating glue layer 3 for isolating and insulating the negative electrode shell 12 and the positive electrode top cap is arranged between the negative electrode shell 12 and the positive electrode top cap, and the negative electrode shell 12, the positive electrode top cap and the insulating glue layer 3 are bonded into a whole; as a top sealing member of the positive electrode case 11.
Step S3, installing a battery cell inside the positive electrode shell 11, where the battery cell is connected to the positive electrode shell 11 through a positive electrode tab and connected to the negative electrode shell 12 through a negative electrode tab; the connection can be made by welding.
Step S4, installing an electrolyte inside the positive electrode case 11; and the positive top cover cap and the positive shell 11 are fixedly connected into a whole by welding to form the steel shell lithium battery.
The above description and examples are only given with respect to the positive electrode case 11, and further, the positive electrode case 11 may be directly converted into the negative electrode case 12, which is not described herein again.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. The steel shell lithium battery provided with the spiral linear explosion-proof valve is characterized by comprising a shell (1), wherein a sealed space is formed inside the shell (1) and is provided with a battery core, the shell (1) comprises an anode shell (11) and a cathode shell (12), an insulating glue layer (3) is arranged between the anode shell (11) and the cathode shell (12), and the anode shell (11) and the cathode shell (12) are insulated and sealed through the insulating glue layer (3); the battery cell is connected with the positive electrode shell (11) through a positive electrode tab and connected with the negative electrode shell (12) through a negative electrode tab; the linear explosion-proof valve (4) is arranged on the anode shell (11) or the cathode shell (12), and the linear explosion-proof valve (4) surrounds the anode shell (11) or the cathode shell (12) and is spiral.
2. The steel-shelled lithium battery provided with the spiral linear explosion-proof valve according to claim 1 is characterized in that the spiral linear explosion-proof valve (4) is engraved on the inner wall or the outer wall of the middle part of the positive electrode shell (11) or the negative electrode shell (12), and the linear explosion-proof valve (4) spirally extends around the central axis of the positive electrode shell (11) or the negative electrode shell (12) and continuously extends from one end of the positive electrode shell (11) or the negative electrode shell (12) to the other end.
3. The steel-shelled lithium battery provided with the spiral linear explosion-proof valve is characterized in that the spiral linear explosion-proof valve (4) is engraved on the inner side or the outer side of the bottom or the top of the positive electrode shell (11) or the negative electrode shell (12), and the linear explosion-proof valve (4) spirally extends outwards to the edge from the center of the bottom or the top of the positive electrode shell (11) or the negative electrode shell (12).
4. A lithium battery with steel casing provided with spiral type linear explosion-proof valve according to claim 1, characterized in that the positive electrode casing (11) or the negative electrode casing (12) is cylindrical, and the lithium battery with steel casing is also cylindrical and is a cylindrical battery.
5. The lithium battery with steel shell provided with the spiral type linear explosion-proof valve is characterized in that the linear explosion-proof valve (4) is a continuous groove or a convex groove; dotted, broken line type grooves or convex grooves.
6. A lithium battery with steel casing provided with a spiral type linear explosion-proof valve according to claim 1, characterized in that the linear explosion-proof valve (4) has at least two line segments with different depths.
7. A lithium battery with steel shell provided with spiral type linear explosion-proof valve according to claim 1, characterized in that the linear explosion-proof valve (4) is provided with at least two; at least two of the linear explosion-proof valves (4) have different depths; or at least two of the linear explosion-proof valves (4) are arranged with different depths crossing each other.
8. The lithium battery with the steel shell provided with the spiral type linear explosion-proof valve is characterized in that the linear explosion-proof valve (4) is printed with the spiral type linear explosion-proof valve (4) on the inner wall or the outer wall of the middle part of the positive electrode shell (11) or the negative electrode shell (12) through punching by laser or electric sparks or a die;
and/or a spiral linear explosion-proof valve (4) is marked on the inner side or the outer side of the bottom or the top of the positive electrode shell (11) or the negative electrode shell (12) by using laser or electric sparks or die stamping.
9. A lithium battery with a steel casing provided with a spiral type linear explosion-proof valve according to claim 1, characterized in that the casing (1) is made of steel material member, aluminum material member or copper material member.
10. A method for manufacturing a steel-shelled lithium battery provided with a spiral type linear explosion-proof valve according to any one of claims 1 to 9, which comprises the following steps:
step S1, manufacturing a cylindrical positive electrode shell (11), wherein the positive electrode shell (11) comprises a positive electrode bottom cover cap,
a spiral linear explosion-proof valve (4) is stamped on the inner wall or the outer wall of the middle part of the anode shell (11) by laser or electric spark or a die;
and/or a spiral linear explosion-proof valve (4) is marked on the inner side or the outer side of the cap at the bottom of the anode by using laser or electric spark or die stamping;
step S2, manufacturing a negative electrode shell (12) and a positive electrode top cap, wherein an insulating glue layer 3 for isolating and insulating the negative electrode shell (12) and the positive electrode top cap is arranged between the negative electrode shell (12) and the positive electrode top cap, and the negative electrode shell (12), the positive electrode top cap and the insulating glue layer 3 are bonded into a whole;
step S3, arranging a battery cell in the positive electrode shell (11), wherein the battery cell is connected with the positive electrode shell (11) through a positive electrode tab and is connected with the negative electrode shell (12) through a negative electrode tab;
step S4, installing electrolyte in the positive electrode shell (11); and the positive top cover cap and the positive shell (11) are fixedly connected into a whole by welding to form the steel shell lithium battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110970824.1A CN113871787A (en) | 2021-08-23 | 2021-08-23 | Steel shell lithium battery provided with spiral linear explosion-proof valve and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115799657A (en) * | 2022-12-28 | 2023-03-14 | 楚能新能源股份有限公司 | Cylindrical battery and manufacturing process thereof |
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| KR20100125951A (en) * | 2009-05-22 | 2010-12-01 | 주식회사 엘지화학 | Safety-vent, and lithium secondary battery comprising the same |
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| CN115799657A (en) * | 2022-12-28 | 2023-03-14 | 楚能新能源股份有限公司 | Cylindrical battery and manufacturing process thereof |
| CN115799657B (en) * | 2022-12-28 | 2023-11-03 | 楚能新能源股份有限公司 | Cylindrical battery and manufacturing process thereof |
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