CN117283145A - Manufacturing method of battery shell with explosion-proof nick, battery and electric equipment - Google Patents
Manufacturing method of battery shell with explosion-proof nick, battery and electric equipment Download PDFInfo
- Publication number
- CN117283145A CN117283145A CN202311253356.1A CN202311253356A CN117283145A CN 117283145 A CN117283145 A CN 117283145A CN 202311253356 A CN202311253356 A CN 202311253356A CN 117283145 A CN117283145 A CN 117283145A
- Authority
- CN
- China
- Prior art keywords
- explosion
- proof
- notch
- battery
- score
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 238000005530 etching Methods 0.000 claims abstract description 48
- 238000010329 laser etching Methods 0.000 claims abstract description 46
- 239000000463 material Substances 0.000 claims abstract description 26
- 239000000956 alloy Substances 0.000 claims description 26
- 229910000838 Al alloy Inorganic materials 0.000 claims description 23
- 239000010935 stainless steel Substances 0.000 claims description 19
- 229910001220 stainless steel Inorganic materials 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 5
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 238000004880 explosion Methods 0.000 description 34
- 238000012795 verification Methods 0.000 description 16
- 230000000694 effects Effects 0.000 description 6
- 230000002265 prevention Effects 0.000 description 6
- 238000004080 punching Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/362—Laser etching
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
-
- 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
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/342—Non-re-sealable arrangements
- H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
The invention relates to a manufacturing method of a battery shell with explosion-proof nicks, a battery and electric equipment, wherein the manufacturing method of the battery shell comprises the following steps: taking a battery shell; determining a laser etching path according to the pattern of the explosion-proof nick; according to the material and thickness of the battery shell, adjusting laser etching parameters; etching an explosion-proof notch on the battery shell according to an etching path by laser; and carrying out post-treatment on the etched battery shell. In the invention, the groove structure with the cross section being wide at the upper part and narrow at the lower part is formed as the explosion-proof notch by laser etching, the formed explosion-proof notch has higher precision, and when the explosion-proof notch is etched, the tearing air pressure value at the explosion-proof notch can be adjusted by adjusting the width of the lower bottom of the groove structure and the included angle between the side edge of the cross section of the groove structure and the vertical direction, so that the tearing air pressure value at the explosion-proof notch is more convenient to adjust.
Description
Technical Field
The invention belongs to the technical field of secondary batteries, and relates to a manufacturing method of a battery shell with explosion-proof nicks, a battery and electric equipment.
Background
At present, new energy automobiles and electric automobiles become a new development trend of the automobile industry; the secondary battery is also widely applied to the field of new energy sources as a power source of equipment such as pure electric vehicles, plug-in hybrid electric vehicles, electric bicycles and the like. At present, most of secondary batteries adopt lithium batteries packaged by an aluminum shell, a pressure relief hole is generally formed in a top cover of the battery, and an explosion-proof valve is welded at the pressure relief hole so as to release internal pressure when the internal pressure of the battery is large, so that safety accidents such as explosion and the like of the battery are prevented. However, when the pressure in the battery is changed and the pressure is too large, if the stability of the explosion-proof valve welded on the top cover is insufficient, the whole explosion-proof valve is easily flushed during pressure relief, thereby damaging the safety of the battery and the whole battery system. In addition, the conventional method requires to open holes in the top cover and separately manufacture the explosion-proof valve, and requires high-precision laser welding equipment, the welding requires sealing and cannot burn through the thinner explosion-proof valve, the explosion-proof valve also requires separately punching scores, the material of the explosion-proof valve still depends on an inlet, the cost is high, and the integrity of a battery shell is not facilitated.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to solve the technical problems that: a manufacturing method of a battery shell with explosion-proof nicks, a battery and electric equipment are provided.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a method of making a battery housing having an explosion-proof score, comprising the steps of:
s100, taking a battery shell;
s200, determining a laser etching path according to the pattern of the explosion-proof nicks;
s300, adjusting parameters of laser etching according to the material and thickness of the battery shell;
s400, etching an explosion-proof notch on the battery shell through laser according to an etching path; the explosion-proof nicks are groove structures with wide sections and narrow bottoms;
s500, performing post-treatment on the etched battery shell.
Further, the battery shell is made of an iron-based alloy material, a nickel-based alloy material, a titanium alloy material or an aluminum alloy material; the residual value of the explosion-proof nick is 0.01 mm-0.3 mm; or (b)
The battery shell is made of an aluminum alloy material, the thickness of the aluminum alloy material is 0.2-1.5 mm, and the score residual value of the explosion-proof score is 0.05-0.5 mm.
Further, when the shell is made of stainless steel materials, the notch residual value of the explosion-proof notch is 0.01-0.08 mm; when the shell is made of an aluminum alloy material, the notch residual value of the explosion-proof notch is 0.05 mm-0.2 mm.
Further, the battery shell is made of an aluminum alloy material, and the thickness of the aluminum alloy material is 0.2-1.5 mm.
Further, the shape of the explosion-proof nick is a curve with a nick formed by cutting a section on a closed curve, and the ratio of the length of the closed curve to the length of the cut-off part is 12/11-72;
in the step S400, when the explosion-proof notch is etched on the battery shell by laser, one point is selected from the curve as the starting point of etching and the other point is selected from the curve as the end point of etching during each laser etching.
Further, when starting laser etching, etching is performed along the curve by taking two end points of the curve as the starting point and the end point of the etching respectively; and then, each time of etching for a preset number of times, respectively moving the starting point and the end point of the etching along the curve to the middle point of the curve for a preset distance until the etching is finished.
Further, the straight line width of the notch is 0.1 mm-80 mm.
Further, the ratio of the length of the closed curve to the length of the cut-off portion is 2 to 12.
Further, the explosion-proof notch comprises a first linear notch and a second linear notch, the first linear notch and the second linear notch are intersected at one point, and the notch depths of the first linear notch, the second linear notch and the intersection point of the first linear notch and the second linear notch are all the same;
in the step S200, when determining the laser etching path, dividing the first linear notch into two sections at the intersection point of the first linear notch and the second linear notch, so as to form the laser etching path comprising three sections of mutually disjoint line segments together with the second linear notch; or (b)
In determining the laser-etched path, the second linear score is divided into two segments at the intersection of the first linear score and the second linear score, thereby forming a laser-etched path including three mutually disjoint segments with the first linear score.
Further, the cross section of the explosion-proof nick is trapezoid with wide upper part and narrow lower part, V-shaped or U-shaped, and the included angle between the side edge of the cross section and the vertical direction is 5-60 degrees; the width of the lower bottom of the section of the explosion-proof nick is 0-0.5 mm.
Further, the included angle between the side edge of the cross section shape and the vertical direction is 25-45 degrees; the width of the lower bottom of the section of the explosion-proof nick is 0.03 mm-0.1 mm.
A secondary battery includes a battery case manufactured by a method of manufacturing a battery case having an explosion-proof score.
An electrical device includes a secondary battery.
In the invention, the groove structure with the cross section being wide at the upper part and narrow at the lower part is formed as the explosion-proof notch by laser etching, the formed explosion-proof notch has higher precision, and when the explosion-proof notch 200 is etched, the tearing air pressure value at the explosion-proof notch can be adjusted by adjusting the width of the lower bottom of the groove structure and the included angle between the side edge of the cross section of the groove structure and the vertical direction, so that the tearing air pressure value at the explosion-proof notch is more convenient to adjust.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:
fig. 1 is a flowchart of a method for manufacturing a battery case with an explosion-proof score according to an embodiment of the present invention.
Fig. 2 and 3 are schematic structural views of a battery case having racetrack-shaped explosion-proof scores.
Fig. 4 is a schematic structural view of a circular explosion-proof score with a notch.
Fig. 5 is a schematic structural view of an oval explosion-proof score with a notch.
Fig. 6 is a schematic view of a racetrack-shaped explosion-proof score with notches.
Fig. 7 is a schematic structural view of a battery case having a cross-shaped explosion-proof score.
Fig. 8 is a schematic structural view of a cross-shaped explosion-proof score.
Fig. 9 is a schematic structural view of a cross-shaped explosion-proof notch with two arc notches added.
Fig. 10 is a schematic cross-sectional view of an explosion vent.
The meaning of the reference numerals in the drawings are:
a housing-100; a top surface-111; a bottom surface-112; wide side-121; narrow sides-131; explosion-proof nick-200; notch-201; semicircular scores-211, 212; straight line segment widening scores-221, 222; a first linear score-231; a second linear score-232; arc score-233.
Detailed Description
The following description of the embodiments of the invention is given by way of specific examples, the illustrations provided in the following examples merely illustrate the basic idea of the invention, and the following examples and features of the examples can be combined with one another without conflict.
Referring to fig. 1, fig. 1 is a flowchart illustrating an embodiment of a method for manufacturing a battery case with explosion-proof scores according to the present invention. The manufacturing method of the battery shell with the explosion-proof nick of the embodiment comprises the following steps:
s100, taking a battery shell; the battery shell can be made of iron-based alloy, nickel-based alloy, titanium alloy or aluminum alloy. In this embodiment, the battery case is made of stainless steel, and the thickness of the stainless steel material may be 0.05mm to 0.8mm, and generally, the thickness of the stainless steel material is selected to be within the range of 0.1mm to 0.3mm as the battery case 100, where the thickness of the stainless steel material in this embodiment is 0.20mm±0.005mm. Of course, the material of the battery case may be other materials such as aluminum alloy, and when an aluminum alloy material is used, the thickness of the aluminum alloy material may be 0.2mm to 1.5mm, and an aluminum alloy material having a thickness of 0.5mm is generally selected. In the prior art, the battery case of the secondary battery is generally made of aluminum alloy, and because the aluminum alloy is relatively soft, the battery case is required to be made of thicker aluminum alloy materials. When the explosion-proof scores 200 are formed on the battery case 100 using the aluminum alloy material, it is general that grooves are previously formed in the regions of the explosion-proof scores 200 by punching or the like to thin the regions, and then the explosion-proof scores 200 are formed in the grooves. Under the condition that the strength requirements of the battery case 100 of the battery are the same, the battery case 100 made of the stainless steel material can be made of a thinner material than the battery case 100 made of the aluminum alloy material, so that the explosion-proof notch 200 can be directly formed on the battery case 100 without punching a groove on the battery case 100. For example, the thickness of the stainless steel material in this embodiment is 0.20 mm.+ -. 0.005mm, which is much smaller than the thickness of 0.5mm commonly used when the battery case is made of an aluminum alloy material.
Referring to fig. 2 and 3, in the present embodiment, the battery case 100 is a rectangular parallelepiped with a sheet shape, and includes a top surface 111, a bottom surface 112 opposite to the top surface 111, two wide side surfaces 121 opposite to each other, and two narrow side surfaces 131 opposite to each other. The battery case 100 of this shape may be used to produce a blade battery, a square battery, etc., and since the two wide sides 121 are closely adhered to the batteries adjacent to both sides during the installation of the aforementioned batteries, respectively, the explosion-proof scores 200 are prevented from being torn, the explosion-proof scores 200 are not generally provided on the two wide sides 121 of the battery case 100. In addition, the top surface 111 of the battery case 100 is generally a top cover plate of the battery, and the electrode and other components are provided thereon, so that the area for providing the explosion-proof score 200 is small, and the explosion-proof score 200 is prevented from being provided on the top surface 111. Thus, the explosion vent 200 would typically be disposed on the narrow side 131 or on the bottom 112. It is not excluded to press the anti-explosion notch 200 on the top cover plate, if the anti-explosion notch is disposed on the top cover plate, the volume of the product to be processed can be reduced, and the dual requirements of the punching device on the size and the precision can be reduced.
Because the battery housing 100 of the blade battery is long, considering that when a certain cell fails, there may be a large difference in air pressure in different areas in the housing, the location of the failed cell may also affect the explosion-proof effect of the explosion-proof structure if it is too far from the explosion-proof score 200. Thus, in this embodiment, the explosion proof scores 200 are provided on the two narrow sides 131. The number of the explosion-proof scores 200 may be more than one, and may be specifically determined according to the length of the battery case 100 (i.e., the length of the battery case 100 in the z-axis direction in fig. 2 and 3). In general, an explosion-proof structure formed by explosion-proof scores 200 is provided every 300mm in the longitudinal direction of a battery case 100, and only one explosion-proof score 200 is provided for a battery case 100 having a length of not more than 600 mm. When only one explosion vent 200 is desired, the explosion vent 200 may be provided on the bottom surface 112. If the length of the battery case 100 is greater than 600mm, each 300mm is increased by one explosion-proof score 200, and each explosion-proof score 200 is uniformly arranged along the length direction of the battery case 100, so that the explosion-proof score 200 can be arranged in a relatively close range when the battery core at any position fails, and the explosion-proof score 200 can be normally torn to discharge the expanded gas in the case 100 when the gas pressure in the battery case 100 reaches the tearing gas pressure value, thereby preventing the explosion of the battery.
S200, determining a laser etching path according to the pattern of the explosion-proof notch. The shape of the anti-explosion notch 200 may be a circular-like curve, a spline curve, or the like, which does not form a sharp included angle. For example: the shape of the anti-explosion notch 200 can be a circular shape, an elliptic shape or a racetrack shape, and the like, and of course, the shape of the anti-explosion notch 200 can also be a hyperbolic shape, a skip tongue line, a parabolic shape, and the like. The use of a rounded-like curve or spline for the vent score 200 avoids the inclusion of sharp angles in the shape of the vent score 200, thereby facilitating laser etching. If the shape of the explosion-proof notch 200 includes a sharp included angle, the laser irradiation position of the laser etching apparatus cannot turn along the sharp included angle at the previous moving speed, and the stay needs to occur at the corner point of the included angle, and then the direction is changed to complete turning, so that the overall time of laser etching can be increased. In addition, when the laser irradiation position stays at the corner point, the laser is also required to be turned off temporarily to avoid excessive etching depth at the corner point, and the laser is turned on again after the direction is changed, so that the control process of the laser equipment is increased. When the explosion-proof nick 200 adopts a quasi-circular curve, no sharp included angle is formed on the curve because the quasi-circular curve is an integrally smooth curve; when the laser etching explosion-proof notch 200 is used, the laser irradiation position of the laser etching equipment can be conveniently moved at a constant speed, and the phenomenon that the whole etching process time is increased due to the fact that the laser irradiation position stays at the corner point of an included angle due to turning is avoided.
When the shape of the explosion-proof notch 200 is a closed curve, the situation that the starting point and the end point of the same etching process are overlapped sometimes occurs when the laser is used for etching the explosion-proof notch 200, so that the situation that the same etching period etches 2 times at the starting point (end point) of the etching process may occur, and the etching depth at the starting point (end point) is increased, and the situation that the starting point (end point) is etched through may be caused. To avoid this, the shape of the explosion-proof score 200 may be a curve with a notch 201 formed by cutting a section on a closed curve. When the explosion-proof notch 200 is etched on the battery case 100 by laser, one point is selected from the curve as a starting point of etching and the other point is selected from the curve as an end point of etching every time the laser is etched. In general, when starting laser etching, two end points of a curve are used as a starting point and an end point of the etching respectively to etch along the curve; and then, each time of etching for a preset number of times, respectively moving the starting point and the end point of the etching along the curve to the middle point of the curve for a preset distance until the etching is finished. Since the curve is non-closed, the starting point and the end point do not coincide when the laser etching is performed by adopting the method, so that the situation that over etching is easy to occur at the starting point (end point) of etching caused by the fact that the starting point and the end point of the same etching of the laser etching equipment are possibly coincident when the shape of the explosion-proof nick 200 is a closed curve can be avoided. The linear width W3 of the notch 201 may have a value ranging from 0.1mm to 80mm.
For example, a curve with a notch 201 may be formed by cutting a section of the closed curve, and the curve with the notch 201 is used as the shape of the anti-explosion notch 200, so that the situation that the starting point and the ending point of etching coincide can be avoided, and the depths of the anti-explosion notches 200 are equal everywhere. Since laser etching is not required at the notch 201, the time of laser etching can also be shortened by forming the notch 201 on the explosion-proof score 200. For the same closed curve, the longer the length of the cut-off curve at the notch 201 is, the shorter the time required for laser etching is, and of course, if the length of the cut-off curve at the notch 201 is too long, the tearing air pressure value of the explosion-proof structure is increased. In order to avoid the influence of overlong cut-off curve length at the notch 201 on the tearing air pressure value of the explosion-proof structure, and simultaneously to minimize the time required by laser etching, the notch 201 is generally formed by cutting off only a small section of curve of the closed curve, and the linear width at the notch 201 is generally 1mm less than or equal to W3 less than or equal to 5mm, in the range, the linear width of the notch 201 hardly influences the tearing air pressure value of the explosion-proof structure. Of course, when the linear width W3 of the notch 201 is larger, the tearing air pressure value of the explosion-proof structure may be increased, and the tearing air pressure value of the explosion-proof structure may be reduced by changing other parameters of the explosion-proof notch 200. In addition, by leaving the notch 201 on the explosion-proof notch 200 without etching, when the explosion-proof notch 200 is torn due to the expansion of the gas inside the shell caused by the heat generation of the battery cell, the notch 201 is of normal thickness and is not torn, so that the connection between the area enclosed by the explosion-proof notch 200 and the battery shell 100 can be ensured, and the secondary damage to other battery cells or water-cooling plates and peripheral connection circuits caused by the fact that the area enclosed by the explosion-proof notch 200 is torn by the whole body and flushed by high pressure can be avoided. Likewise, other curves with indentations 201 may be selected as the shape of the anti-explosion score 200. For example, the shape of the anti-explosion score 200 may also be hyperbolic, skip tongue, parabolic, and other non-closed arbitrary spline curves.
For example, referring to fig. 4, the shape of the explosion-proof notch 200 is a circular shape with a notch 201. The diameter D1 of the circle is in the range of 5mm to 80mm, preferably 10 mm.ltoreq.d1.ltoreq.18 mm, and d1=15 mm may be taken, for example. In the figures, the length of the notch 201 is 2mm, the notch 201 may be disposed at any position of the circle, and the notch 201 faces the length direction of the rectangular surface where the explosion-proof notch 200 is located (i.e., when the explosion-proof notch 200 is disposed on the narrow side 131 of the case 100, the notch 201 faces the z-axis direction of fig. 2 and 3, and when the explosion-proof notch 200 is disposed on the bottom 112 of the case 100, the notch 201 faces the x-axis direction of fig. 2 and 3).
Referring to fig. 5, a schematic structural view of the explosion-proof notch 200 when the shape is elliptical with a notch 201 is shown. The major axis direction of the ellipse coincides with the length direction of the battery case 100 (i.e., the major axis of the ellipse is parallel to the z-axis of the coordinate system in fig. 2 and 3). The distance L1 between two focuses of the ellipse is more than or equal to 5mm and less than or equal to 80mm, and is preferably more than or equal to 25mm and less than or equal to 50mm, and L1 is less than or equal to 80mm. The difference between the length L2 of the major axis of the ellipse and the distance L1 between the two focuses of the ellipse is 5mm less than or equal to (L2-L1) less than or equal to 80mm, and the value of (L2-L1) is less than or equal to the value of L1, preferably 10mm less than or equal to (L2-L1) less than or equal to 18mm; for example, l1=35 mm and l2—l1=15 mm may be taken. In the figure, the length of the notch 201 is 2mm, and the notch 201 is preferably disposed at one end point of the major axis of the ellipse.
Referring to fig. 6, the explosion-proof notch 200 is shown in a racetrack shape with a notch 201. The explosion-proof notch 200 includes a semicircular notch 211 and a semicircular notch 212 which are symmetrically arranged, and two linear-segment widening notches (221, 222) connecting corresponding ends of the semicircular notch 211 and the semicircular notch 212. Wherein, the straight line segment widening score 221 is used for connecting one pair of endpoints corresponding to the semicircular arc score 211 and the semicircular arc score 212, and the straight line segment widening score 222 is used for connecting the other pair of endpoints corresponding to the semicircular arc score 211 and the semicircular arc score 212. The directions of the linear segment widening score 221 and the linear segment widening score 222 coincide with the length direction of the battery case 100 (i.e., the linear segment widening score 221 and the linear segment widening score 222 are parallel to the z-axis of the coordinate system in fig. 2 and 3). The diameter D2 of the semicircular scores 211 and 212 is in the range of 5 mm-80 mm, preferably 10 mm-18 mm and D2 is less than or equal to 10 mm; the length L3 of the straight line segment widening notch 221 and the straight line segment widening notch 222 is more than or equal to 5mm and less than or equal to L3 and less than or equal to 80mm; for example, d2=15 mm, preferably l3=35 mm, may be taken. In the figure, the length of the notch 201 is 2mm, and the notch 201 is preferably disposed at the midpoint of the semicircular arc notch 211 or the semicircular arc notch 212.
When the ratio of the notch 201 to the closed curve is large, the actual shape of the notch cannot be expressed accurately by the notch length, and in this case, the shape of the notch may be expressed by the ratio of the length of the closed curve to the length of the cut-off portion, and the ratio of the length of the closed curve to the length of the cut-off portion may be in the range of 12/11 to 72. Taking a closed curve shape as an example, the shape of the explosion-proof notch 200 after forming the notch 201 is an arc of 30 ° to 355 °. In general, the ratio of the length of the closed curve to the length of the cut-off portion is 2 to 12, that is, the explosion-proof score 200 generally takes the shape of an arc of 180 ° to 330 °, preferably 270 °. Of course, the explosion-proof score 200 may be an arc with an arc degree θ of 60 °, 90 °, 120 °, or 150 °. In the same situation, when the explosion prevention score 200 is in the shape of an arc with an arc degree θ smaller than 90 °, the air pressure required for tearing the explosion prevention score 200 will be significantly increased, when the explosion prevention score 200 is in the shape of an arc with an arc degree θ between 90 ° and 180 °, the air pressure required for tearing the explosion prevention score 200 will be significantly decreased with the increase of the arc degree θ of the arc, and when the explosion prevention score 200 is in the shape of an arc with an arc degree θ larger than 180 °, the air pressure required for tearing the explosion prevention score 200 will be less changed with the arc degree θ of the arc.
The shape of the explosion-proof score 200 may also be two intersecting straight scores. For example: referring to fig. 7 and 8, the explosion-proof notch 200 may further comprise a first linear notch 231 and a second linear notch 232, wherein the first linear notch 231 and the second linear notch 232 intersect at a point O 3 . The first linear notch 231 and the second linear notch 232 intersect at the point O only in shape 3 In the step S200, when determining the laser etching path according to the pattern of the explosion-proof notch 200, the first and second linear notches 231 and 231 are etchedIntersection point O of trace 232 3 The second linear score 232 is divided into two segments such that the two segments into which the second linear score 232 is divided form a laser etched path consisting of three mutually disjoint segments together with the first linear score 231. Of course, the first linear notch 231 may be divided into two segments, so as to form a laser etching path composed of three mutually disjoint segments.
Since the laser etching path is composed of three mutually disjoint line segments, when the process of laser etching the first linear notch 231 and the second linear notch 232 is adopted in the step S400, the etching paths of the first linear notch 231 and the second linear notch 232 are also disjoint. I.e., during the laser etching process, the first linear notch 231 and the second linear notch 232 are etched once (i.e., during one etching period), point O 3 Only the first linear notch 231 is etched (when the laser etching path divides the first linear notch 231 into two sections, point O 3 Only with the second linear notch 232) to point O 3 Is etched once in one etching period, but is not etched twice with the etching of the first linear notch 231 and the second linear notch 232 at the same time, avoiding the intersection point O 3 The etching depth of the position is increased due to excessive etching times, so that the position is etched through. Further, the first linear notch 231, the second linear notch 232, and the intersection point O of the first linear notch 231 and the second linear notch 232 are formed 3 The score depths at all points are the same.
In this embodiment, the first linear notch 231 is disposed along the width direction (i.e., the y-axis direction in fig. 7) of the narrow side 131 of the housing 100, the length of the first linear notch 231 may be determined according to the width of the narrow side 131 of the housing 100, if the length of the first linear notch 231 is too small, when the air pressure inside the housing 100 is too high and the explosion-proof notch 200 needs to be torn, the difficulty of tearing the explosion-proof notch 200 will be increased, and the opening formed after the tearing will be smaller, so as to slow the gas discharging speed inside the housing 100; if the length of the first linear score 231 is too close to the width of the narrow side 131 of the housing 100, the overall strength of the housing 100 is again affected. The length L4 of the first linear score 231 may be 6mm to 80mm, and is typically 12 mm.ltoreq.l4.ltoreq.20mm, preferably l4=16mm. The second linear score 232 is disposed along the length direction (i.e., the z-axis direction in fig. 7) of the narrow side 131 of the housing 100, and since the length of the narrow side 131 of the housing 100 is relatively large, the length L5 of the second linear score 232 may be relatively long, so that when the air pressure inside the housing 100 is too high and the explosion-proof score 200 needs to be torn, the formed relatively long opening may be torn to rapidly discharge the high-pressure air inside the housing 100. The length L5 of the second linear score 232 may be 12mm to 100mm, and is typically 20 mm.ltoreq.l5.ltoreq.50 mm, preferably l5=32 mm. It will be appreciated that when the explosion proof score 200 is disposed on the bottom surface 112, the second linear score 212 is disposed along the length of the bottom surface 112 of the housing 100 (i.e., in the x-axis direction in fig. 1 and 2).
In this embodiment, the intersection point O of the first linear notch 231 and the second linear notch 232 3 Is the midpoint of the first linear notch 231 and the second linear notch 232, i.e., the first linear notch 231 and the second linear notch 232 are perpendicularly bisected to each other, so that the shape of the explosion-proof notch 200 is a symmetrical cross shape. Due to the intersection point O between the first linear notch 231 and the second linear notch 232 3 Where the explosion-proof scores 200 are provided in four directions, the air pressure inside the case 100 is too high to ensure the intersection O 3 The position can be easily torn, and the situation that the explosion-proof notch 200 cannot be torn when the air pressure in the shell 100 exceeds a preset tearing air pressure value due to the fact that the depth parameter error of the explosion-proof notch 200 is large is avoided.
When the explosion-proof score 200 is shaped like a cross, after the air pressure in the casing 100 is too high to tear the explosion-proof score 200, the area of the explosion-proof score which can be turned outwards under the impact of high-pressure air is small, so that a large opening cannot be formed, and the discharge speed of the high-pressure air in the casing 100 can still be influenced. In order to further increase the speed of discharging the high pressure gas inside the case 100 after the tear of the anti-explosion score 200, the anti-explosion score 200 may further include at least one circular arc score 233, wherein each circular arc score 233 has a center of a circle which is an intersection O of the first linear score 231 and the second linear score 232 3 . The arc of a circleThe scores 233 generally take the shape of circular arcs with an arc of about 90 °, and two ends of each circular arc score 233 intersect with the first linear score 231 and the second linear score 232, respectively. The diameter of the circular arc score 233 is less than or equal to the length of the shorter one of the first linear score 231 and the second linear score 232.
Referring to fig. 9, in the present embodiment, the anti-explosion notch 200 includes two circular arc notches 233 with equal diameters, wherein the diameters of the two circular arc notches 233 are 15mm, which are slightly smaller than the length of the first straight line notch 231; and two circular arc scores 233 along the intersection point O 3 Symmetrical. The radian of each of the two circular arc scores 233 is 90 °; of course, the radian of the two circular arc scores 233 may be greater than 90 °. The score depth of the two circular arc scores 233 and the score depth at the intersection point of the two circular arc scores 233 and the first and second linear scores 231 and 232, respectively, are equal to the score depths of the first and second linear scores 231 and 232. By providing the two circular arc scores 233, when the air pressure inside the case 100 is too high to tear the explosion-proof score 200, the two fan-shaped areas formed by the circular arc scores 233 and the first linear score 231 and the second linear score 232 can be completely turned outwards in the tearing process, so that the opening area formed when the explosion-proof score 200 is torn is greatly increased, and the high-pressure air inside the battery case 100 can be rapidly discharged.
S300, adjusting parameters of the laser etching equipment according to the material and the thickness of the battery shell; and to calibrate and adjust to ensure that the material can be processed accurately. In this embodiment, the battery case 100 is made of stainless steel material with a thickness of 0.20mm + -0.005 mm, the power of the laser etching apparatus is 10W-2000W, the frequency parameter is 1 KHZ-1000, and the speed parameter is 1 mm/s-4000 mm/s.
And S400, placing the battery shell on a processing platform of a laser etching device, and etching an explosion-proof notch on the battery shell through the laser etching device according to a laser etching path. Referring to fig. 10, in this embodiment, the cross-section of the anti-explosion notch 200 is trapezoidal; the connecting part of the trapezoid waist and the lower bottom is of a round corner structure. Of course, in other embodiments, the cross-sectional shape of the anti-explosion score 200 may be V-shaped or U-shaped. The lower bottom width of the section of the explosion-proof notch 200 has a value within the range of 0-0.5 mm. In this embodiment, the explosion-proof score 200 is formed by laser etching. The laser etching is to utilize high-energy laser beam to irradiate the surface of the etched workpiece to melt and gasify the workpiece to form a groove with a certain depth, so as to realize the purpose of etching the material. The laser etching has the characteristics of high precision, small width of the notch, high etching yield, high stability, no consumable, no pollution and low cost. In the prior art, the explosion-proof notch 200 of the aluminum alloy shell is generally formed by adopting a stamping mode, and limited by a stamping process, the existing machine cannot meet requirements of machining size and high precision, high-precision stamping equipment with extremely large purchase or input quantity is required, the manufacturing cost is extremely high, the depth of the formed explosion-proof notch 200 cannot be accurately controlled by the existing stamping equipment, and the cross section width (namely the groove width) of the explosion-proof notch 200 is generally wider. The depth and width of the scores can be precisely controlled by forming the explosion-proof scores 200 through laser etching, so that the groove width of the explosion-proof scores 200 can be greatly reduced.
The value of the tearing air pressure at the explosion-proof score 200 is mainly affected by the score residual T of the explosion-proof score 200 and the thickness T of the battery case 100. With continued reference to fig. 10, the score residual of the explosion-proof score 200 is defined as the thickness of the battery case 100 remaining after the thinning at the explosion-proof score 200. If the ratio T/T of the thickness T of the battery case 100 to the score residual T of the explosion-proof score 200 is large, the strength of the battery case 100 is greatly reduced, and when the battery collides with other products during use, the battery case 100 is highly likely to be broken, so that external air enters the inside of the battery case 100 through the breaking port to chemically react with the material of the battery cell, thereby causing the battery to fail, and even possibly causing a battery explosion accident. If the ratio of T/T is small, when the internal air pressure of the battery reaches the upper limit air pressure, the pressure relief opening formed by tearing from the explosion-proof notch 200 is small, so that the gas in the battery cannot be discharged in time, and the battery may be excessively expanded to cause explosion.
In this embodiment, the ratio of the thickness T of the battery case 100 to the score residual T of the explosion-proof score 200 is 1.1.ltoreq.T/t.ltoreq.30, and the ratio of T/T is generally in the range of 1.5 to 10. For example: when the battery case 100 is made of a stainless steel material having a thickness of 0.05mm to 0.8mm under the condition that the ratio range of T/T is satisfied, the score residual T of the explosion-proof score 200 is generally 0.01mm to 0.3mm, preferably 0.01mm to 0.08mm. When the battery case 100 is made of an aluminum alloy material having a thickness of 0.2mm to 1.5mm, the score residual t of the explosion-proof score 200 is generally 0.05mm to 0.5mm, preferably 0.05mm to 0.2mm. In particular, in this embodiment, since the battery case 100 is made of a stainless steel material with a thickness of 0.20mm±0.005mm, the score residual value t of the explosion-proof score 200 is generally in the range of: t is more than or equal to 0.02mm and less than or equal to 0.08mm.
In this embodiment, the included angle a between the waist of the trapezoid and the vertical direction (i.e. the height of the trapezoid) and the value of the width W1 of the bottom of the trapezoid will also have a certain influence on the tearing air pressure value of the explosion-proof structure. The included angle a between the waist of the trapezoid and the height of the trapezoid is within the range of 5-60 degrees; preferably 25 DEG.ltoreq.a.ltoreq.45 deg. The width W1 of the bottom of the trapezoid is preferably 0.03mm or more and W1 or less and 0.1mm or less.
S500, performing post-treatment on the etched battery shell. And removing the residual oxide layer during laser etching through post-treatment cleaning, and improving the etching quality at the detail position through fine adjustment.
When the battery core inside the battery is damaged, a large amount of heat is emitted and/or gas is released, so that the pressure inside the battery case 100 expands rapidly, and if the pressure is not released timely, explosion risks occur when the air pressure inside the battery case 100 is too high. In this embodiment, if the air pressure in the battery case 100 is too high, the explosion-proof notch 200 will be torn off under the action of high air pressure as the air pressure increases, so that the air in the battery case 100 is discharged from the torn-off position of the explosion-proof notch 200, thereby releasing the high-pressure air in the battery case 100, preventing the explosion of the battery and guaranteeing the personal safety of the producer and the user. The air pressure value at which the explosion-proof notch 200 is torn is the tearing air pressure value of the explosion-proof structure. In addition, since the explosion-proof notch 200 is directly etched on the battery housing 100 to form the explosion-proof structure in the embodiment, the explosion-proof structure and the battery housing 100 are integrated, compared with the prior art in which the pressure relief hole is formed and the explosion-proof valve is welded at the pressure relief hole, the process is simpler, the welding process is not needed, and the explosion-proof effect affecting the explosion-proof structure due to errors in the welding process is avoided.
In this embodiment, the stainless steel material case 100 having a thickness of 0.20mm±0.005mm was used, and the explosion-proof score 200 having a trapezoid cross section and a circular shape having a notch 201 as a whole was used as a verification object, so that the influence of the ratio of the thickness T of the battery case 100 to the score residual T of the explosion-proof score 200 on the explosion-proof effect was verified. Wherein, the battery case 100 is in a cuboid shape, the explosion-proof nick 200 is arranged on the narrow side surface 131, the straight line width of the notch 201 is 2mm, the width W1 of the lower bottom of the trapezoid is 0.08mm, the included angle between the waist of the trapezoid and the height of the trapezoid is more than or equal to 25 degrees and less than or equal to 45 degrees, and the diameter of the circle is 15mm. Since the thickness of the stainless steel battery case 100 is not easily changed, in the case where the thickness of the stainless steel battery case 100 is fixed, the ratio of T/T is changed by changing the score residual value, and a plurality of times of verification is performed for each value of the score residual value T, and the verification data are shown in table 1:
TABLE 1
The pressing speed in the table is the speed at which the battery case is pressurized during the test. Since the above verification is concerned only with the value of the tearing air pressure when the explosion-proof score 200 is torn, the process of the explosion of the battery case is not simulated, and thus the time required for tearing the explosion-proof score 200 is not taken as a verification parameter.
In this embodiment, the stainless steel material housing 100 with a thickness of 0.20mm±0.005mm is also used, and the explosion-proof notch 200 with a trapezoid cross section and a circular overall shape with a notch 201 is used as a verification object, so that the influence of the diameter of the circular shape on the explosion-proof effect is verified. Wherein, the battery case 100 is in a cuboid shape, the explosion-proof nick 200 is arranged on the narrow side surface 131, the straight line width of the notch 201 is 2mm, the width W1 of the lower bottom of the trapezoid is 0.08mm, the included angle between the waist of the trapezoid and the height of the trapezoid is more than or equal to 25 degrees and less than or equal to 45 degrees, and the nick residual value t is 0.04mm. Multiple verifications were made for each diameter, with the verification data shown in table 2:
TABLE 2
The valve opening time in the table refers to the time required from the start of pressurization to the tearing of the explosion-proof score 200; because the verification and the subsequent verification are both simulation of the explosion process of the battery shell, the valve opening time parameter is added, and the valve opening time is ideal time within the range of 30-40 s.
In this embodiment, the stainless steel material housing 100 with a thickness of 0.20mm±0.005mm is also used, and the explosion-proof notch 200 with a trapezoid cross section, an arc of 120 ° overall shape and an arc diameter of 15mm is used as a verification object, so that the influence of the width W1 of the bottom of the trapezoid on the explosion-proof effect is verified. Wherein, the battery case 100 is in a rectangular parallelepiped shape, the explosion-proof nick 200 is provided on the narrow side 131, the nick residual value t is 0.04mm, and the included angle between the waist of the trapezoid and the height of the trapezoid is 25 DEG-a-45 deg. Multiple verifications were made for each trapezoidal bottom width W1, with verification data as shown in table 3:
TABLE 3 Table 3
In this embodiment, the stainless steel shell 100 with a thickness of 0.20mm±0.005mm is further used, and the explosion-proof nick 200 with a trapezoid cross section and an arc overall shape is used as a verification object, so that the influence of the arc radian (the ratio of the length of the closed curve to the length of the cut-off part) and the diameter of the arc on the explosion-proof effect is verified. Wherein, the battery case 100 is in a rectangular parallelepiped shape, the explosion-proof nick 200 is provided on the narrow side 131, the nick residual value t is 0.04mm, and the included angle between the waist of the trapezoid and the height of the trapezoid is 25 DEG-a-45 deg. Multiple verifications were made for each arc of arc and diameter, and the verification data are shown in table 4:
/>
TABLE 4 Table 4
In this embodiment, a groove structure with a cross section that is wider at the top and narrower at the bottom is formed as the explosion-proof notch 200 by laser etching, so that the formed explosion-proof notch 200 has higher precision, and when the explosion-proof notch 200 is etched, the tearing air pressure value at the explosion-proof notch 200 can be adjusted by selecting the bottom width W1 of the groove structure and the included angle a between the side edge of the cross section of the groove structure and the vertical direction, so that the tearing air pressure value at the explosion-proof notch 200 is more convenient to adjust.
The invention also discloses a secondary battery which can be a power battery or an energy storage battery, and the shell of the secondary battery can be a battery shell manufactured by adopting the manufacturing method of the battery shell with the explosion-proof nick in any embodiment. Of course, the secondary battery further includes a battery cell housed in a battery case and other necessary structures for a conventional secondary battery, which are prior art and are not described herein.
The invention also discloses electric equipment, which comprises the secondary battery in any embodiment, so as to supply power to the electric equipment through the secondary battery. For example, the electric equipment can be a new energy electric automobile or a hybrid electric automobile. It can be understood that the electric equipment can also be an electric tool, an energy storage device, a power device or other devices driven by electric power such as a mobile phone, a tablet personal computer, a computer, an unmanned aerial vehicle and the like.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the claims of the present invention.
Claims (13)
1. A method of making a battery housing having an explosion-proof score, comprising the steps of:
s100, taking a battery shell;
s200, determining a laser etching path according to the pattern of the explosion-proof nicks;
s300, adjusting parameters of laser etching according to the material and thickness of the battery shell;
s400, etching an explosion-proof notch on the battery shell through laser according to an etching path; the explosion-proof nicks are groove structures with wide sections and narrow bottoms;
s500, performing post-treatment on the etched battery shell.
2. The method of manufacturing a battery case with an explosion-proof score according to claim 1, wherein: the battery shell is made of an iron-based alloy material, a nickel-based alloy material, a titanium alloy material or an aluminum alloy material.
3. The method of manufacturing a battery case with an explosion-proof score according to claim 2, wherein: the battery shell is made of stainless steel materials, and the thickness of the stainless steel materials is 0.05-0.8 mm; the residual value of the explosion-proof nick is 0.01 mm-0.3 mm; or (b)
The battery shell is made of an aluminum alloy material, the thickness of the aluminum alloy material is 0.2-1.5 mm, and the score residual value of the explosion-proof score is 0.05-0.5 mm.
4. The method of manufacturing a battery case with an explosion-proof score according to claim 3, wherein: when the shell is made of stainless steel materials, the notch residual value of the explosion-proof notch is 0.01-0.08 mm; when the shell is made of an aluminum alloy material, the notch residual value of the explosion-proof notch is 0.05 mm-0.2 mm.
5. The method of manufacturing a battery case with an explosion-proof score according to claim 1, wherein: the shape of the explosion-proof nick is a curve with a nick formed by cutting off a section on a closed curve, and the ratio of the length of the closed curve to the length of the cut-off part is 12/11-72;
in the step S400, when the explosion-proof notch is etched on the battery shell by laser, one point is selected from the curve as the starting point of etching and the other point is selected from the curve as the end point of etching during each laser etching.
6. The method of manufacturing a battery case with an explosion-proof score according to claim 5, wherein: when starting laser etching, etching along a curve by taking two end points of the curve as starting points and end points of the etching respectively; and then, each time of etching for a preset number of times, respectively moving the starting point and the end point of the etching along the curve to the middle point of the curve for a preset distance until the etching is finished.
7. The method of manufacturing a battery case with an explosion-proof score according to claim 5, wherein: the straight line width of the notch is 0.1 mm-80 mm.
8. The method of manufacturing a battery case with an explosion-proof score according to claim 5, wherein: the ratio of the length of the closed curve to the length of the cut-off portion is 2 to 12.
9. The method of manufacturing a battery case with an explosion-proof score according to claim 1, wherein: the explosion-proof notch comprises a first linear notch and a second linear notch, the first linear notch and the second linear notch are intersected at one point, and the notch depths of the first linear notch, the second linear notch and the intersection point of the first linear notch and the second linear notch are all the same;
in the step S200, when determining the laser etching path, dividing the first linear notch into two sections at the intersection point of the first linear notch and the second linear notch, so as to form the laser etching path comprising three sections of mutually disjoint line segments together with the second linear notch; or (b)
In determining the laser-etched path, the second linear score is divided into two segments at the intersection of the first linear score and the second linear score, thereby forming a laser-etched path including three mutually disjoint segments with the first linear score.
10. The method for manufacturing a battery case with an explosion-proof score according to any one of claims 1 to 9, wherein: the cross section of the explosion-proof nick is trapezoid with wide upper part and narrow lower part, V-shaped or U-shaped, and the included angle between the side edge of the cross section and the vertical direction is 5-60 degrees; the width of the lower bottom of the section of the explosion-proof nick is 0-0.5 mm.
11. The method of making a battery case with an explosion-proof score according to claim 10, wherein: the included angle between the side edge of the cross section shape and the vertical direction is 25-45 degrees; the width of the lower bottom of the section of the explosion-proof nick is 0.03 mm-0.1 mm.
12. A secondary battery characterized in that: a battery case comprising a battery case having an explosion-proof score according to any one of claims 1 to 11.
13. An electrical consumer, characterized in that: a secondary battery comprising the secondary battery according to claim 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311253356.1A CN117283145A (en) | 2023-09-26 | 2023-09-26 | Manufacturing method of battery shell with explosion-proof nick, battery and electric equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311253356.1A CN117283145A (en) | 2023-09-26 | 2023-09-26 | Manufacturing method of battery shell with explosion-proof nick, battery and electric equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117283145A true CN117283145A (en) | 2023-12-26 |
Family
ID=89256738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311253356.1A Pending CN117283145A (en) | 2023-09-26 | 2023-09-26 | Manufacturing method of battery shell with explosion-proof nick, battery and electric equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117283145A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100140238A1 (en) * | 2008-12-10 | 2010-06-10 | Continental Disc Corporation | Machining score lines in a rupture disc using laser machining |
| CN102983293A (en) * | 2012-11-30 | 2013-03-20 | 武汉昊诚能源科技有限公司 | Scoring method of anti-explosion battery shell |
| CN113517501A (en) * | 2021-04-25 | 2021-10-19 | 东莞锂威能源科技有限公司 | Battery and power consumption device containing same |
| CN113871788A (en) * | 2021-09-29 | 2021-12-31 | 苏州东博精密制造有限公司 | Laser integrated power battery explosion-proof valve and manufacturing method thereof |
| CN215989101U (en) * | 2021-08-31 | 2022-03-08 | 宁德时代新能源科技股份有限公司 | Pressure relief device, single battery, battery and electric equipment |
| CN216362147U (en) * | 2021-11-04 | 2022-04-22 | 东莞锂微电子科技有限公司 | High-safety battery and cover plate assembly thereof |
| CN114628846A (en) * | 2022-05-12 | 2022-06-14 | 比亚迪股份有限公司 | Battery, battery module, battery pack and vehicle |
| CN217848219U (en) * | 2022-07-01 | 2022-11-18 | 惠州锂威新能源科技有限公司 | Explosion-proof housing of battery, battery and consumer |
-
2023
- 2023-09-26 CN CN202311253356.1A patent/CN117283145A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100140238A1 (en) * | 2008-12-10 | 2010-06-10 | Continental Disc Corporation | Machining score lines in a rupture disc using laser machining |
| CN102983293A (en) * | 2012-11-30 | 2013-03-20 | 武汉昊诚能源科技有限公司 | Scoring method of anti-explosion battery shell |
| CN113517501A (en) * | 2021-04-25 | 2021-10-19 | 东莞锂威能源科技有限公司 | Battery and power consumption device containing same |
| CN215989101U (en) * | 2021-08-31 | 2022-03-08 | 宁德时代新能源科技股份有限公司 | Pressure relief device, single battery, battery and electric equipment |
| CN113871788A (en) * | 2021-09-29 | 2021-12-31 | 苏州东博精密制造有限公司 | Laser integrated power battery explosion-proof valve and manufacturing method thereof |
| CN216362147U (en) * | 2021-11-04 | 2022-04-22 | 东莞锂微电子科技有限公司 | High-safety battery and cover plate assembly thereof |
| CN114628846A (en) * | 2022-05-12 | 2022-06-14 | 比亚迪股份有限公司 | Battery, battery module, battery pack and vehicle |
| CN217848219U (en) * | 2022-07-01 | 2022-11-18 | 惠州锂威新能源科技有限公司 | Explosion-proof housing of battery, battery and consumer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2479817B1 (en) | Secondary battery and method of manufacturing the same | |
| CN103165839B (en) | Secondary cell | |
| CN102460771B (en) | Sealed battery | |
| US9741985B2 (en) | Sealing plate for prismatic secondary battery, method for producing the same, and prismatic secondary battery using the same | |
| JP2001307707A (en) | Security apparatus of square battery and its manufacturing method | |
| CN215989101U (en) | Pressure relief device, single battery, battery and electric equipment | |
| JP2010282850A (en) | Sealed battery | |
| CN117283145A (en) | Manufacturing method of battery shell with explosion-proof nick, battery and electric equipment | |
| JP2005038773A (en) | Sealed type battery with cleavage groove | |
| CN221080259U (en) | Explosion-proof nick has battery case, secondary cell and consumer of breach | |
| CN221009157U (en) | Battery case, secondary battery and electric equipment that explosion-proof valve integration set up | |
| CN221080257U (en) | Battery case, battery and consumer with explosion-proof structure of integration | |
| JP2002008615A (en) | Sealed type battery | |
| CN221080258U (en) | Battery case with linear explosion-proof nicks, secondary battery and electric equipment | |
| CN117059999A (en) | Battery case, battery and electric equipment with integrated explosion-proof structure | |
| CN112886110A (en) | Top cover assembly and power battery | |
| US20230223642A1 (en) | Pressure relief apparatus, battery cell, battery, and electrical device | |
| CN117913428A (en) | Manufacturing method of battery shell with explosion-proof nick, battery shell and secondary battery | |
| KR20180065206A (en) | Laser Welding Jig Providing Improved Laser Weldability | |
| CN116231220B (en) | Cylindrical battery and electric equipment | |
| CN102689094B (en) | Beam welding of a multi-sheet work stack with a single common welding interface | |
| CN218867323U (en) | Pressure relief device, single battery, battery and electric equipment | |
| JP2016091932A (en) | Current cutoff device, manufacturing method of current cutoff device, and secondary battery | |
| CN219498079U (en) | Shell assembly, battery monomer, battery and power utilization device | |
| US20230198089A1 (en) | Pressure relief apparatus, battery cell, battery and electric apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |