Cylindrical battery fixing device with enhanced attachment / detachment function

Abstract

The present invention relates to a cylindrical battery fixing device that includes: a lower housing having a flat shape and formed with through holes into which cylindrical batteries are inserted vertically; an upper housing fixed to the top of the lower housing and having an overall cylindrical or triangular prism shape with guide grooves formed at 120-degree intervals on the bottom end of the cylindrical or triangular prism; and three fixing parts that are inserted into the guide grooves of the upper housing and are movable along the top surface of the lower housing toward the center of the lower housing and have fixing jaws on their front surfaces that are inserted and fixed to beading portions of the cylindrical battery cells, wherein fixing blocks are coupled to the rear surfaces of the fixing parts and two or more compression springs are provided between the fixing blocks and the upper housing.

Description

[Technical Field]

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2023-0180142, filed December 12, 2023, the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to a cylindrical battery fixing device with an enhanced attachment / detachment function, specifically, to a cylindrical battery fixing device with an enhanced attachment / detachment function that allows a cylindrical battery to be fixed to the cylindrical battery fixing device for manufacturing or processing, and then the cylindrical battery can be smoothly removed after manufacturing or processing is completed. [Background technology]

[0003] Depending on the shape of the battery case, secondary batteries are classified into cylindrical batteries and prismatic batteries, in which the electrode assembly is housed in a cylindrical or prismatic metal can, and pouch batteries, in which the electrode assembly is housed in a pouch-shaped case made of an aluminum laminate sheet.

[0004] FIG. 1 is a schematic diagram of a cylindrical battery fixing device according to the prior art, FIG. 2 is a cross-sectional view of the upper housing of a cylindrical battery fixing device according to the prior art, and FIG. 3 is a schematic diagram of a fixing block of a cylindrical battery fixing device according to the prior art.

[0005] The cylindrical battery fixing device shown in Figures 1 to 3 is a device for fixing cylindrical batteries in order to perform the crimping process. This device includes a lower housing 10 with through-holes 11 through which the cylindrical batteries pass, an upper housing 20 fixed to the top of the lower housing 10 with guide grooves 21 and housing fixing parts 22 formed at 120-degree intervals, fixing parts 30 for fixing the cylindrical batteries, and a total of three compression springs 40 located between fixing blocks 32 on the rear surface of fixing part 30 and the upper housing 20.

[0006] In the conventional cylindrical battery fixing device, the fixing jaw 31 of the fixing part 30 is in close contact with the cylindrical battery, and the crimping presser moves down and presses the cylindrical battery to form a crimped part on the battery. After the crimping process, the fixing part 30 retracts. At this time, since only one compression spring 40 is provided, eccentricity of the battery to one side may occur.

[0007] The fixed part 30 moves forward and backward toward the center by one compression spring 40. When moving backward, the fixed part 30 must move backward by springing out due to the elasticity of the compression spring 40, but there is a problem in that the fixed part 30 may get caught in the middle due to eccentricity.

[0008] Patent Document 1 discloses a cylindrical secondary battery cell production device that includes a fixing member that presses and fixes the inner groove of the battery can, and a second moving unit that is composed of a hydraulic pump or motor that moves the fixing member, but does not disclose any configuration for improving the attachment / detachment function.

[0009] Patent Document 2 discloses a crimping device for lithium batteries that includes a crimping unit that applies multiple springs to press a cylindrical lithium battery to form a crimp, but it differs from the configuration that presses a beading unit to support and fix the battery.

[0010] Patent Documents 3 and 4 also do not disclose any structure for improving the fixed jaw and the associated attachment / detachment function. [Prior art documents] [Patent documents]

[0011] [Patent Document 1] Korean Patent Publication No. 10-2023-0131764

[0012] [Patent Document 2] Korean Patent Publication No. 10-1998-0078956

[0013] [Patent Document 3] Chinese Patent Publication No. 115472891

[0014] [Patent Document 4] China Utility Model Registration No. 218524843 Summary of the Invention [Problem to be solved by the invention]

[0015] In order to solve the above problems, the present invention aims to provide a cylindrical battery fixing device with enhanced attachment / detachment functions that can prevent eccentricity of the fixing part when fixing and releasing a cylindrical battery.

[0016] Specifically, the present invention aims to provide a cylindrical battery fixing device with enhanced attachment / detachment functionality that can prevent the fixing part from getting caught on the surrounding area due to eccentricity when the fixing part moves forward and backward. [Means for solving the problem]

[0017] In order to solve the above problems, the present invention provides a cylindrical battery fixing device including: a lower housing (100) having a through hole (110) through which a flat cylindrical battery is inserted vertically; an upper housing (200) fixed to the top of the lower housing (100) and having an overall cylindrical or triangular prism shape with guide grooves (210) formed at 120-degree intervals on the bottom end of the cylindrical or triangular prism shape; and three fixing parts (300) inserted into the guide grooves (210) of the upper housing (200) and movable toward the center of the lower housing (100) along the top surface of the lower housing (100), with fixing jaws (310) on their front surfaces that are inserted and fixed to the beading portions of the cells of the cylindrical battery. In this device, a fixing block (320) is coupled to the rear surface of the fixing part (300), and two or more compression springs (400) are installed between the fixing block (320) and the upper housing (200).

[0018] The compression springs (400) may be arranged symmetrically with respect to the central axis of the guide groove (210).

[0019] At each end of the compression spring (400), one end may be fixed to the housing fixing portion (220) of the upper housing (200), and the other end may be fixed to the end fixing portion (325) of the fixing block (320).

[0020] The compression springs 400 provided in the fixed block 320 and the upper housing 200 may be positioned so that they are at the same horizontal height.

[0021] The fixing part (300) may include a front end part 340 having a concave shape and having the fixing jaw (310) protruding forward from the center, a central part (350) connected to the lower end of the front end part 340, having an overall hexahedral shape, and passing through the guide groove (210), and the fixing block (320) connected to the central part (350).

[0022] The length of the guide groove (210) may be equal to or greater than half the length of the central portion (350).

[0023] When the three fixing parts are coupled to each other in a meshed manner, the fixing jaws (310) of the three fixing parts (300) can form a single circle.

[0024] The three fixed parts (300) may include a synchronizing part (not shown) that enables them to simultaneously move the same amount of displacement when moving along the upper surface of the lower housing (100) toward the center of the lower housing (100) and when moving in the opposite direction from the center.

[0025] The cylindrical battery (C) may be positioned so as to pass through the through-hole (110) of the lower housing (100) and protrude partially upward from the lower housing (100).

[0026] The guide grooves may be provided at intervals of 90 degrees or 75 degrees on the lower end of the upper housing, and four or five of the fixing portions may be provided.

[0027] Furthermore, the present invention can also be provided in the form of a combination of various means for solving the above problems. [Effects of the Invention]

[0028] The cylindrical battery fixing device with enhanced attachment / detachment function according to the present invention moves the fixing part by two compression springs, so that it is possible to prevent the fixing part from becoming eccentric to one side.

[0029] The cylindrical battery fixing device with enhanced attachment / detachment function according to the present invention has the advantage that when the fixing part moves backward by the two compression springs, eccentricity does not occur even if the fixing part moves backward so as to jump out due to the elasticity of the compression springs, and therefore the fixing part can be prevented from getting caught on the surrounding area.

[0030] The cylindrical battery fixing device with enhanced attachment / detachment function according to the present invention has a guide groove length that is at least half the length of the central portion, and by guiding the central portion longer, it has the effect of preventing eccentricity. [Brief explanation of the drawings]

[0031] [Figure 1] FIG. 1 is a schematic diagram of a cylindrical battery fixing device according to the prior art.

[0032] [Figure 2] 1 is a cross-sectional view of an upper housing of a cylindrical battery fixing device according to the prior art.

[0033] [Figure 3] FIG. 1 is a schematic diagram of a fixing block of a cylindrical battery fixing device according to the prior art.

[0034] [Figure 4]1 is a schematic diagram of a cylindrical battery fixing device according to an embodiment of the present invention.

[0035] [Figure 5] 1 is a cross-sectional view of an upper housing of a cylindrical battery fixing device according to an embodiment of the present invention.

[0036] [Figure 6] 1 is a schematic diagram of a fixing block of a cylindrical battery fixing device according to an embodiment of the present invention.

[0037] [Figure 7] 10A and 10B are schematic diagrams showing a state in which a cylindrical battery is fixed using a cylindrical battery fixing device according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0038] Hereinafter, with reference to the accompanying drawings, a detailed description will be given of an embodiment of the present invention that will enable a person skilled in the art to easily carry out the present invention. In describing the operation principle of the embodiment of the present invention in detail, detailed description of related well-known functions or configurations will be omitted if it is determined that such detailed description may unnecessarily obscure the gist of the present invention.

[0039] Throughout the drawings, the same reference numerals are used for parts having similar functions and actions. Throughout the specification, when a part is said to be connected to another part, this includes not only a direct connection but also an indirect connection via another element therebetween. Furthermore, unless otherwise specified, "including a certain element" does not mean that other elements are excluded, but that other elements may also be included.

[0040] Descriptions that limit or specify additional elements are applicable to all inventions and are not limited to a particular invention unless otherwise limited.

[0041] Throughout the description and claims of this invention, the singular includes the plural unless otherwise stated.

[0042] Throughout the description and claims, "or" includes "and" unless otherwise stated. Thus, "comprising A or B" means the three cases of including A, including B, or including both A and B.

[0043] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A cylindrical battery fixing device with enhanced attachment / detachment function according to the present invention will now be described with reference to the accompanying drawings.

[0044] FIG. 4 is a schematic diagram of a cylindrical battery fixing device according to an embodiment of the present invention, FIG. 5 is a cross-sectional view of the upper housing of a cylindrical battery fixing device according to an embodiment of the present invention, FIG. 6 is a schematic diagram of a fixing block of a cylindrical battery fixing device according to an embodiment of the present invention, and FIG. 7 is a schematic diagram showing the state in which a cylindrical battery is fixed using a cylindrical battery fixing device according to an embodiment of the present invention.

[0045] As shown in FIGS. 4 to 7, the cylindrical battery fixing device according to the present invention includes a lower housing 100, an upper housing 200, a fixing portion 300, and a compression spring 400.

[0046] The lower housing 100 has a flat, fixed shape and is provided at its center with a through-hole 110 through which a cylindrical battery C can be inserted. When the cylindrical battery C is inserted through the through-hole 110 of the lower housing 100, a portion of the cylindrical battery C protrudes upward from the lower housing 100.

[0047] The upper housing 200 is positioned and fixed on top of the lower housing 100, and has an overall cylindrical or triangular prism shape, with guide grooves 210 provided at 120-degree intervals on the lower end of the cylindrical or triangular prism shape. Each guide groove 210 of the upper housing 200 is provided with two housing fixing portions 220, and the ends of compression springs 400 are fixed to the housing fixing portions 220, respectively.

[0048] The length of the guide groove 210 is at least half the length of the central portion 350, and by guiding the central portion 350 for a longer length, it is possible to prevent eccentricity of the fixing portion 300. In the conventional cylindrical battery fixing device, the length of the guide groove 21 is less than half the length of the central portion 350.

[0049] The fixing portion 300 is for fixing the cylindrical battery C that is positioned through the through-hole 110 of the lower housing 100, and includes a fixing jaw 310, a fixing block 320, a front end portion 340, and a central portion 350.

[0050] The fixing parts 300 are provided in three pieces, spaced apart at equal distances based on the central axis of the cylindrical battery C, and these three fixing parts 300 may be provided with a synchronization part (not shown) so that they can simultaneously move the same amount of displacement when moving along the top surface of the lower housing 100 toward the center of the lower housing 100 or in the opposite direction from the center.

[0051] The synchronization unit (not shown) is connected to the fixed unit 300 by a bolt or a screw, and can operate on the same principle as the simultaneous movement of three chucks. The technique of simultaneously moving the fixed unit 300 using such a synchronization unit (not shown) is a technique that is applied in the machinery-related field, and is already used in the chucks of lathes used in metal processing.

[0052] In addition, the three fixing parts 300 may be provided at positions that form the same angle with respect to the adjacent fixing parts 300 with respect to the central axis of the cylindrical battery C as a reference.

[0053] The fixing jaws 310 have a concave shape, and are adapted to be inserted into the beading portion of the cylindrical battery C by making close contact with the cylindrical battery C to fix the cylindrical battery C in place.

[0054] The concave shape of the fixing jaws 310 has the same curvature as the side of the cylindrical battery C that it is closely attached to, and when the fixing parts 300 advance toward the cylindrical battery C and are coupled to each other so as to interlock, the fixing jaws 310 of the three fixing parts 300 form a single circle.

[0055] When the fixing jaws 310 are positioned to interlock with each other, they may be configured to have the same shape as the edge of the cylindrical battery C. In this case, the fixing force can be strongest. Even if they are not configured to have the same shape as the edge of the cylindrical battery C, when the fixing jaws 310 are positioned to interlock with each other, it is preferable that they are positioned at the same angle and distance from the central axis of the cylindrical battery C.

[0056] The fixed block 320 is located behind a central portion 350 located on the upper surface of the lower housing 100 and may have a flat plate shape that supports a compression spring 400 .

[0057] The fixed block 320 has an end fixing portion 325 recessed to a certain depth, which prevents the compression spring 400 supported by the fixed block 320 from being supported in a portion other than the designated position or from leaving the designated position.

[0058] The front end 340 extends vertically from a central portion 350 located on the top surface of the lower housing 100, and a fixing jaw 310 protruding toward the cylindrical battery C is formed on the side adjacent to the cylindrical battery C.

[0059] The front end 340 extends vertically from the end of the central portion 350 that is closest to the cylindrical battery C.

[0060] The central portion 350 has an overall hexahedral shape, passes through the guide groove 210, and is positioned on the upper surface of the lower housing 100. The central portion 350 is connected to the fixed block 320 and the front end portion 340 to support them.

[0061] Here, the length of the guide groove 210 is formed to be at least half the length of the central portion 350. By making the length of the guide groove 210 at least half the length of the central portion 350, the central portion 350 is guided over a longer distance, which has the effect of preventing eccentricity.

[0062] Although FIG. 6 does not specifically disclose the configuration for fixing the fixed block 320 and the central portion 350, the fixed block 320 and the central portion 350 can be fixed and connected by means of bolts, bolts and nuts, or push-in screw members, and there is no particular limitation as long as the members and methods can fix and connect the fixed block 320 and the central portion 350.

[0063] The compression spring 400 is a spring having elasticity, and its ends are fixed in relation to the movement of the fixing part 300. That is, one side is fixed to the end fixing part 325 of the fixing block 320, and the other side is fixed to the housing fixing part 220 of the upper housing 200, thereby preventing the spring from moving out of position.

[0064] The compression springs 400 fixed to the fixing block 320 and the housing fixing part 220 are provided to be positioned at the same horizontal height because if the positions are different, the position of the pressure applied by the compression springs 400 may change, which may cause eccentricity.

[0065] The compression springs 400 are arranged and fixed symmetrically with respect to the central axis of the guide groove 210, thereby preventing eccentricity from occurring.

[0066] The surface S on which the compression spring 400 is seated of the end fixing portion 325 of the fixing block 320 to which the compression spring 400 is fixed is located symmetrically at the same distance from the vertical central axis of the fixing block 320, thereby preventing eccentricity of the compression spring 400.

[0067] The present invention may be a cylindrical battery fixing device having four or five fixing portions 300, as required, and such a structural change may result in four or five guide grooves 210.

[0068] When four guide grooves 210 are provided, the guide grooves 210 can be provided at positions spaced 90 degrees apart from each other relative to adjacent guide grooves 210, and when five guide grooves 210 are provided, the guide grooves 210 can be provided at positions spaced 75 degrees apart from each other relative to adjacent guide grooves 210.

[0069] For example, assuming that the number of guide grooves 210 is n, the guide grooves 210 are provided at positions that are spaced apart from each other by 360 / n degrees with respect to the adjacent guide grooves 210 .

[0070] It goes without saying that the fixed portion 300 and the compression spring 400 are also positioned at the same angle depending on the position of the guide groove 210.

[0071] Although specific portions of the contents of the present invention have been described in detail above, it will be apparent to those skilled in the art that such specific techniques are merely preferred embodiments and do not limit the scope of the present invention. It is obvious to those skilled in the art that various changes and modifications are possible within the scope and technical idea of ​​the present invention, and it goes without saying that such changes and modifications also fall within the scope of the accompanying claims. [Explanation of symbols]

[0072] 10, 100 Lower housing

[0073] 11, 110 through holes

[0074] 20, 200 Upper housing

[0075] 21, 210 Guide groove

[0076] 22, 220 Housing fixing part

[0077] 30, 300 Fixed part

[0078] 31, 310 Fixed jaw

[0079] 32, 320 fixed block

[0080] 33, 325 End fixation part

[0081] 40, 400 compression spring

[0082] 34, 340 front end

[0083] 35, 350 central part

[0084] C Cylindrical battery

[0085] S The surface on which the compression spring rests

Claims

1. a lower housing having a flat shape and formed with a through hole into which a cylindrical battery is inserted vertically; an upper housing fixed to an upper portion of the lower housing, having an overall cylindrical or triangular prism shape, and having guide grooves at intervals of 120 degrees at a lower end of the cylindrical or triangular prism; three fixing parts, each of which is inserted into the guide groove of the upper housing, movable along the upper surface of the lower housing toward the center of the lower housing, and provided with fixing jaws on its front surface that are inserted into and fixed to beading portions of cells of the cylindrical battery; A cylindrical battery fixing device comprising: A cylindrical battery fixing device, wherein a fixing block is coupled to a rear surface of the fixing portion, and two or more compression springs are provided between the fixing block and the upper housing.

2. The cylindrical battery fixing device according to claim 1 , wherein the compression springs are arranged symmetrically with respect to the central axis of the guide groove.

3. 3. The cylindrical battery fixing device according to claim 2, wherein one end of each of the compression springs is fixed to the housing fixing portion of the upper housing, and the other end is fixed to the end fixing portion of the fixing block.

4. The cylindrical battery fixing device according to claim 2 , wherein the compression springs provided on the fixing block and the upper housing are positioned so that they have the same horizontal height.

5. The fixing portion is a front end portion having a concave shape and a fixed jaw protruding forward from the center; a central portion connected to a lower end of the front end portion, having an overall hexahedral shape, and passing through the guide groove; the fixed block coupled to the central portion; The cylindrical battery fixing device of claim 1 , comprising:

6. The cylindrical battery fixing device according to claim 5 , wherein the length of the guide groove is equal to or greater than half the length of the central portion.

7. The cylindrical battery fixing device according to claim 1 , wherein when the three fixing parts are coupled to each other in an interlocking manner, the fixing jaws of the three fixing parts form a single circle.

8. 2. The cylindrical battery fixing device according to claim 1, further comprising a synchronizing portion that allows the three fixing portions to simultaneously move by the same amount of displacement when moving along the upper surface of the lower housing toward the center of the lower housing and when moving in the opposite direction from the center.

9. The cylindrical battery fixing device of claim 1 , wherein the cylindrical battery passes through the through-hole of the lower housing and is positioned with a portion of the cylindrical battery protruding upward from the lower housing.

10. The guide grooves are provided at the lower end of the upper housing at intervals of 90 degrees or 75 degrees, The cylindrical battery fixing device according to claim 1 , wherein the number of fixing portions is four or five.

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