Cylindrical battery fixing device having enhanced attachment / detachment function

Abstract

The present invention relates to a cylindrical battery fixing device comprising: a flat lower housing which has a through hole into which a cylindrical battery is vertically inserted; an upper housing which is fixed to the upper part of the lower housing, overall has the shape of a cylinder or a triangular prism, and has guide recesses provided at intervals of 120 degrees in the lower end of the cylinder or triangular prism shape; and three fixing units which are inserted into the respective guide recesses of the upper housing and can move toward the center of the lower housing along the upper surface thereof, and each of which has, on the front surface thereof, a fixing protrusion that is insertedly fixed to the beading part of a cylindrical battery cell, wherein a fixing block is coupled to the rear surface of each fixing unit, and two or more compression springs are provided between each fixing block and the upper housing.

Description

Cylindrical battery holder with enhanced detachability

[0001] This application claims the benefit of priority to Korean Patent Application No. 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 enhanced attachment / detachment functionality. Specifically, the invention relates to a cylindrical battery fixing device with enhanced attachment / detachment functionality, which can secure a cylindrical battery to the cylindrical battery fixing device for manufacturing or processing, and then easily discharge the cylindrical battery after manufacturing or processing.

[0003] Secondary batteries are classified into cylindrical and prismatic batteries, in which the electrode assembly is built into a cylindrical or prismatic metal can, and pouch-type batteries, in which the electrode assembly is built into a pouch-type case made of aluminum laminate sheet, depending on the shape of the battery case.

[0004] FIG. 1 is a schematic diagram of a cylindrical battery fixing device according to the prior art, FIG. 2 is a cross-sectional diagram of a lower 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 illustrated in FIGS. 1 to 3 is a device for fixing a cylindrical battery in order to perform a crimping process. It comprises a lower housing (10) having a through hole (11) through which a cylindrical battery passes, an upper housing (20) fixed to the upper portion of the lower housing (10) and having guide grooves (21) and housing fixing portions (22) formed at 120-degree intervals, a fixing portion (30) for fixing the cylindrical battery, and a total of three compression springs (40) positioned between a fixing block (32) at the rear of the fixing portion (30) and the upper housing (20).

[0006] In a cylindrical battery fixing device according to the prior art, the fixing jaw (31) of the fixing portion (30) is pressed against the cylindrical battery and fixed, and the crimping pressure portion moves down from the top to apply pressure to form a crimping portion on the cylindrical battery. After the crimping process, the fixing portion (30) retracts, and at this time, since one compression spring (40) is provided, an eccentricity that is biased to one side may occur.

[0007] The fixed part (30) moves forward and backward toward the center by a single compression spring (40). However, when moving backward, it should bounce back due to the elasticity of the compression spring (40), but there is a problem 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 including a fixing member that pressurizes and fixes the inner groove of a battery can and a second moving member 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 a lithium battery including a crimping portion that applies pressure to a cylindrical lithium battery by applying a plurality of springs to form a crimp, but is different from a configuration that supports and fixes a beading portion by applying pressure.

[0010] Patent documents 3 and 4 also do not disclose any configuration for improving the fixed jaw and the related attachment / detachment function.

[0011] (Prior art literature)

[0012] Republic of Korea Patent Publication No. 2023-0131764 (Patent Document 1)

[0013] Republic of Korea Patent Publication No. 1998-0078956 (Patent Document 2)

[0014] Chinese Patent Publication No. 115472891 (Patent Document 3)

[0015] Chinese Utility Model Publication No. 218524843 ('Patent Document 4')

[0016] In order to solve the above problems, the present invention aims to provide a cylindrical battery fixing device with an enhanced attachment / detachment function that can prevent eccentricity of a fixing portion when fixing and releasing a cylindrical battery.

[0017] Specifically, the purpose of the present invention is to provide a cylindrical battery fixing device with an enhanced attachment / detachment function that can prevent the fixing part from getting caught on the periphery due to eccentricity when the fixing part moves forward and backward.

[0018] In order to solve the above problems, the present invention is a cylindrical battery fixing device including a lower housing (100) having a through hole (110) formed in a flat plate shape into which a cylindrical battery is vertically inserted, an upper lower jig (200) fixed to the upper portion of the lower housing (100) and having an overall cylindrical or triangular prism shape, with guide grooves (210) provided at 120-degree intervals at the lower end of the cylindrical or triangular prism shape, and three fixing parts (300) each inserted into the guide grooves (210) of the upper housing (200) and capable of moving along the upper surface of the lower housing (100) toward the center of the lower housing (100) and having fixing protrusions (310) inserted and fixed to the beading portion of the cylindrical battery cell on the front surface, wherein a fixing block (320) is coupled to the rear surface of the fixing part (300), and two or more compression springs (400) are provided between the fixing block (320) and the upper housing (200). It is equipped.

[0019] The above compression spring (400) can be arranged symmetrically with respect to the central axis of the guide groove (210).

[0020] At each end of the compression spring (400), one end may be fixed to the housing fixing part (220) of the upper housing (200), and the other end may be fixed to the end fixing part (325) of the fixing block (320).

[0021] The compression springs (400) provided in each of the above fixed block (320) and the upper housing (200) can be positioned so that their horizontal heights are the same.

[0022] The above-mentioned fixed part (300) may include a front end (340) having a concave shape and a front-protruding fixing protrusion (310) provided at the center, a central part (350) connected to the lower end of the front end (340) and having an overall hexahedral shape penetrating the guide groove (210), and the fixed block (320) coupled to the central part (350).

[0023] The length of the above guide home (210) may be more than half the length of the central portion (350).

[0024] When the above three fixed parts are combined so as to be interlocked with each other, the fixed jaws (310) of the three fixed parts (300) can form one circle.

[0025] A synchronizing member (not shown) may be added to enable the three fixed members (300) to move simultaneously by the same 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 to the center.

[0026] The above cylindrical battery (C) may be positioned so that a portion thereof protrudes upward from the lower housing (100) by penetrating the through hole (110) of the lower housing (100).

[0027] The above guide grooves are provided at 90 degree or 75 degree intervals at the bottom of the upper housing, and the above fixing parts may be provided in numbers of 4 or 5.

[0028] The present invention can also be provided in a form in which various means for solving the above problem are combined.

[0029] The cylindrical battery fixing device with enhanced attachment / detachment function according to the present invention can prevent the fixing part from becoming eccentric to one side by moving the fixing part by two compression springs.

[0030] The cylindrical battery fixing device with enhanced attachment / detachment function according to the present invention has the advantage that the fixing part does not become eccentric even when it bounces back due to the elasticity of the compression springs when moving backwards, thereby preventing the fixing part from getting caught on the periphery.

[0031] The cylindrical battery fixing device with enhanced attachment / detachment function according to the present invention has a guide groove whose length is at least half of the length of the central portion, thereby preventing eccentricity by guiding the central portion longer.

[0032] Figure 1 is a schematic diagram of a cylindrical battery fixing device according to the prior art.

[0033] Figure 2 is a cross-sectional view of the lower housing of a cylindrical battery fixing device according to the prior art.

[0034] Figure 3 is a schematic diagram of a fixing block of a cylindrical battery fixing device according to the prior art.

[0035] Figure 4 is a schematic diagram of a cylindrical battery fixing device according to an embodiment of the present invention.

[0036] FIG. 5 is a cross-sectional view of the lower housing of a cylindrical battery fixing device according to an embodiment of the present invention.

[0037] Figure 6 is a schematic diagram of a fixing block of a cylindrical battery fixing device according to an embodiment of the present invention.

[0038] Fig. 7 is a schematic diagram showing a cylindrical battery being fixed using a cylindrical battery fixing device according to an embodiment of the present invention.

[0039] Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail, so that those skilled in the art can easily implement the present invention. When describing the operating principles of the embodiments of the present invention in detail, detailed descriptions of known functions or components will be omitted if they are deemed to unnecessarily obscure the gist of the present invention.

[0040] Parts with similar functions and actions are designated by the same drawing reference numerals throughout the drawings. Throughout the specification, when a part is said to be connected to another part, this includes not only direct connections but also indirect connections with other elements intervening. Furthermore, inclusion of a component does not exclude other components unless otherwise specifically stated, but rather implies the inclusion of additional components.

[0041] The description that concretizes or adds to the components may be applied to all inventions unless there is a special limitation, and is not limited to the description of a specific invention.

[0042] Throughout the description and claims of the invention herein, the singular includes the plural unless otherwise stated.

[0043] Throughout the description and claims of the present invention, the term "or" includes "and" unless otherwise stated. Therefore, "comprising A or B" means all three cases of including A, including B, or including A and B.

[0044] Hereinafter, a cylindrical battery fixing device with enhanced detachable function according to the present invention will be described with reference to the attached drawings.

[0045] 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 diagram of a lower 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 a state of fixing a cylindrical battery using a cylindrical battery fixing device according to an embodiment of the present invention.

[0046] As shown in FIGS. 4 to 7, the cylindrical battery fixing device according to the present invention is configured to include a lower housing (100), an upper housing (200), a fixing portion (300), and a compression spring (400).

[0047] The lower housing (100) is fixed in a flat shape, and a through hole (110) is formed in the center thereof through which a cylindrical battery (C) can be positioned. At this time, when the cylindrical battery (C) is positioned by penetrating through the through hole (110) of the lower housing (100) described above, a portion of the cylindrical battery (C) is positioned in a state in which a portion protrudes upward from the lower housing (100).

[0048] The upper housing (200) is positioned and fixed on the upper portion of the lower housing (100), and has an overall cylindrical or triangular prism shape, and guide grooves (210) are provided at 120-degree intervals on the lower portion of the cylindrical or triangular prism shape. Two housing fixing parts (220) are provided in each of the guide grooves (210) of the upper housing (200), and the end portions of compression springs (400) are fixed to each of the housing fixing parts (220).

[0049] The length of the guide groove (210) is more than half the length of the central portion (350), and by guiding the central portion (350) longer, there is an effect of preventing eccentricity of the fixing portion (300). In the cylindrical battery fixing device according to the prior art, the length of the guide groove (21) is less than half the length of the central portion (35).

[0050] The fixing part (300) is for fixing a cylindrical battery (C) positioned through the through hole (110) of the lower housing (100), and is composed of a fixing jaw (310), a fixing block (320), a front end (340), and a central part (350).

[0051] Three fixed parts (300) may be provided at equal distances based on the central axis of the cylindrical battery (C), and a synchronizing part (not shown) may be provided so that these three fixed parts (300) can move along the upper surface of the lower housing (100) toward the center of the lower housing (100) or move in the opposite direction to the center, simultaneously moving by the same amount of displacement.

[0052] The synchronous unit (not shown) is connected to the fixed unit (300) using bolts or screws, etc., and can operate on the same principle as the simultaneous movement of three chucks. The technology of simultaneously moving the fixed unit (300) using this synchronous unit (not shown) is a technology applied in the machinery-related field, and is already used in chucks of lathes used in metal processing.

[0053] Additionally, the three fixing parts (300) can be provided at positions that form the same angle as the adjacent fixing parts (300) based on the central axis of the cylindrical battery (C).

[0054] The fixed jaw (310) has a concave shape and is in close contact with the cylindrical battery (C) to fix the cylindrical battery (C), and is shaped to be inserted into the beading portion of the cylindrical battery (C).

[0055] The concave shape of the fixed jaw (310) has the same curvature as the side surface of the cylindrical battery (C) that is in contact with it, and when the fixed parts (300) are combined to advance in the direction of the cylindrical battery (C) and engage with each other, the fixed jaws (310) of the three fixed parts (300) form one circle.

[0056] When the fixing jaws (310) are positioned to interlock with each other, they can be configured to have the same shape as the edge of the cylindrical battery (C). In this case, the fixing force can be the strongest. Even when 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 be positioned at the same angle and the same distance from the central axis of the cylindrical battery (C).

[0057] The fixed block (320) is located on the rear side of the central portion (350) located on the upper surface of the lower housing (100) and may be a flat plate shape that supports the compression spring (400).

[0058] The fixed block (320) is provided with a terminal fixing portion (325) that is recessed to a certain depth, so that the compression spring (400) supported by the fixed block (320) can be prevented from being supported in a part other than the designated position or from moving out of the designated position.

[0059] The front end (340) extends vertically from the central portion (350) located on the upper surface of the lower housing (100), and a fixing protrusion (310) protruding toward the cylindrical battery (C) is formed on the side adjacent to the cylindrical battery (C).

[0060] The front end (340) extends vertically from the end of the central part (350) that is closest to the cylindrical battery (C).

[0061] The central portion (350) has an overall hexahedral shape and is positioned on the upper surface of the lower housing (100) while penetrating the guide groove (210), and serves to support by being connected to the aforementioned fixed block (320) and front end (340).

[0062] Here, the length of the guide groove (210) is formed to be more than half the length of the central portion (350). Since the length of the guide groove (210) is more than half the length of the central portion (350), there is an effect of preventing eccentricity by guiding the central portion (350) longer.

[0063] Although the configuration for fixing the fixed block (320) and the central portion (350) is not specifically disclosed in FIG. 6, the fixed block (320) and the central portion (350) can be fixed and coupled by means of a bolt-based connection, a bolt and nut-based connection, a press-fit screw member, or the like, and there are no particular limitations on any member or method that can fix and couple the fixed block (320) and the central portion (350).

[0064] The compression spring (400) is an elastic spring that participates in the movement of the fixed part (300), and each end is fixed, with one end being fixed to the fixed end part (325) of the fixed block (320), and the other end being fixed to the housing fixed part (220) of the upper housing (200), thereby preventing displacement.

[0065] The compression springs (400) fixed to the fixed block (320) and the housing fixing member (220) are positioned at the same horizontal height. This is because if the positions are formed differently, the position of the pressure applied by the compression springs (400) may be different, causing eccentricity.

[0066] The compression spring (400) is arranged and fixed symmetrically with respect to the central axis of the guide groove (210) to prevent eccentricity from occurring.

[0067] 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 positioned symmetrically at an equally spaced distance based on the vertical central axis of the fixing block (320) to prevent eccentricity of the compression spring (400).

[0068] The present invention may be a cylindrical battery fixing device having four or five fixing parts (300) as needed, and the number of guide grooves (210) may also be four or five as a result of this structural change.

[0069] When four guide grooves (210) are provided, the guide grooves (210) can be provided at positions at intervals of 90 degrees from adjacent guide grooves (210), and when five guide grooves (210) are provided, the guide grooves (210) can be provided at positions at intervals of 75 degrees from adjacent guide grooves (210).

[0070] For example, assuming the number of guide grooves (210) is n, the guide grooves (210) are provided at positions that form a 360 / n degree interval from adjacent guide grooves (210).

[0071] It is obvious that the fixed part (300) and the compression spring (400) are also positioned at the same angle depending on the position of the guide home (210).

[0072] As described above, specific parts of the present invention have been described in detail. To a person having ordinary skill in the art, such specific descriptions are merely preferred embodiments, and the scope of the present invention is not limited thereby. It is obvious to a person skilled in the art that various changes and modifications are possible within the scope and technical idea of ​​the present invention, and it is natural that such changes and modifications fall within the scope of the appended patent claims.

[0073] (Explanation of symbols)

[0074] 10, 100: Lower housing

[0075] 11, 110: Through hole

[0076] 20, 200: Upper housing

[0077] 21, 210: Guide Home

[0078] 22, 220: Housing fixing part

[0079] 30, 300: Fixed part

[0080] 31, 310: Fixed jaw

[0081] 32, 320: Fixed block

[0082] 33, 325: Terminal fixation

[0083] 40, 400: Compression spring

[0084] 34, 340: Front end

[0085] 35, 350: Central

[0086] C: Cylindrical battery

[0087] S: Surface where the compression spring is seated

Claims

1. A lower housing having a through hole formed into which a cylindrical battery is vertically inserted in the shape of a flat plate; An upper and lower member fixed to the upper portion of the lower housing and having an overall cylindrical or triangular prism shape, with guide grooves provided at 120-degree intervals on the lower portion of the cylindrical or triangular prism shape; Three fixing parts, each inserted into a guide groove of the upper housing and capable of moving along the upper surface of the lower housing toward the center of the lower housing, and having a fixing protrusion provided on the front to be inserted and fixed into the beading portion of the cylindrical battery cell; In a cylindrical battery fixing device including: A cylindrical battery fixing device having a fixing block coupled to the rear of the above-mentioned fixing part, and two or more compression springs provided between the fixing block and the upper housing.

2. In paragraph 1, The above compression spring is a cylindrical battery fixing device symmetrically arranged based on the central axis of the above guide groove.

3. In paragraph 2, A cylindrical battery fixing device in which one end of each end of the compression spring is fixed to a housing fixing portion of the upper housing, and the other end is fixed to a terminal fixing portion of the fixing block.

4. In paragraph 2, A cylindrical battery fixing device in which the compression springs provided in each of the above-mentioned fixed blocks and the upper housing are positioned so that their horizontal heights are the same.

5. In paragraph 1, The above fixed part, A front end having a concave shape and a fixed jaw protruding toward the front in the center; A central portion connected to the lower end of the above-mentioned front section and having an overall hexahedral shape penetrating the above-mentioned guide groove; The fixed block coupled to the central portion; A cylindrical battery holder comprising:

6. In paragraph 4, A cylindrical battery fixing device in which the length of the above guide home is at least half the length of the above central portion.

7. In paragraph 1, When the above three fixed parts are combined so that they interlock with each other, The three fixing jaws of the above-mentioned fixing parts are cylindrical battery fixing devices that form one circle.

8. In paragraph 1, A cylindrical battery fixing device having a synchronizing member that allows the three fixing members to move the same displacement simultaneously when moving along the upper surface of the lower housing toward the center of the lower housing and when moving in the opposite direction to the center.

9. In paragraph 1, The above cylindrical battery is a cylindrical battery fixing device positioned such that a portion of the cylindrical battery penetrates the through hole of the lower housing and protrudes upward from the lower housing.

10. In paragraph 1, The above guide grooves are provided at 90 degree or 75 degree intervals on the lower part of the upper housing, respectively. The above fixing members are cylindrical battery fixing devices, each of which is provided with four or five fixing members.

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