Positioning tool

Abstract

The utility model discloses a positioning tool which is applied to positioning of a single cylindrical battery and comprises a limiting piece and a stopping piece. A plurality of limiting arc parts arranged side by side are concavely formed in one side surface of the limiting piece, the limiting piece is used for being arranged between the single cylindrical battery and the side wall of the box body and is detachably connected with the box body, and the radian of the limiting arc parts is matched with the radian of the side surface of the single cylindrical battery; and the limiting arc parts are arranged on the side surfaces of the corresponding single cylindrical batteries in a one-to-one correspondence manner. And the stop piece is used for being pressed above at least part of the single cylindrical batteries and is detachably connected with the box body. The horizontal acting force is applied to the single cylindrical batteries in the box body through the limiting piece, the placement positions of the single cylindrical batteries in the box body are limited, the stopping piece has a stopping effect on the jumped single cylindrical batteries, the limiting piece, the stopping piece and the box body are easy and convenient to assemble and disassemble, and the assembly efficiency of the battery pack is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery technical field especially, relates to a positioning tool. BACKGROUND

[0002] Cylindrical battery is a kind of battery with high capacity, long cycle life and wide use environment temperature, which can be made of various materials such as dry battery, lithium battery, nickel-cadmium battery and nickel-hydrogen battery, and has very wide application.

[0003] A plurality of cylindrical batteries form cylindrical battery module in array. In order to keep the distance between the adjacent two cylindrical batteries in the cylindrical battery module, battery module fixing support is needed. The battery module fixing support is in frame structure, and the frame structure surrounds the cylindrical battery module. The frame structure includes first, second, third and fourth side frames connected in sequence. The two side frames are locked by bolts, so that the cylindrical batteries in the cylindrical battery module cannot be moved.

[0004] However, the battery module fixing support is complicated to assemble, and the assembly efficiency is low, which is not conducive to the assembly efficiency of the battery pack in the later period. UTILITY MODEL CONTENTS

[0005] The present application expects to provide a positioning tool, at least for improving the assembly efficiency of the battery pack.

[0006] The utility model provides a positioning tool, so that a plurality of the single cylindrical battery axis is parallelly arranged, and the tool comprises: a limiting piece and a stop piece.

[0007] One side of the limiting piece is recessed to form a plurality of limiting arc parts arranged side by side, the limiting arc parts include a plurality of first limiting arc parts and a plurality of second limiting arc parts, and the first limiting arc parts and the second limiting arc parts are arranged alternately. Wherein, the center of the first limiting arc part is located on the first straight line, the center of the second limiting arc part is located on the second straight line, and the first straight line and the second straight line are parallel and spaced apart.

[0008] The stop piece is arranged opposite to the limiting piece, and the side of the stop piece opposite to the limiting piece is recessed to form a plurality of inspection arc parts arranged side by side, the inspection arc parts include a plurality of first inspection arc parts and a plurality of second inspection arc parts, and the first inspection arc parts and the second inspection arc parts are arranged alternately. Wherein, the center of the first inspection arc part is located on the second straight line, the center of the second inspection arc part is located on the first straight line, and the first limiting arc part and the second inspection arc part, the second limiting arc part and the first inspection arc part respectively enclose a space suitable for positioning the single cylindrical battery.

[0009] As an implementation manner, the first limiting arc part and the second checking arc part enclose a cylindrical space, the second limiting arc part and the first checking arc part enclose another cylindrical space, and the side surfaces of the two cylindrical spaces are in contact with each other.

[0010] As an implementation manner, the first limiting arc part and the second limiting arc part are arranged alternately and continuously, and the first checking arc part and the second checking arc part are arranged alternately and continuously.

[0011] As an implementation manner, two limiting members are provided, the two limiting members are arranged at intervals, and the stop member is arranged between the two limiting members. The first limiting arc part of the two limiting members is arranged in alignment in a first direction, the second limiting arc part of the two limiting members is arranged in alignment in the first direction, and the first direction is perpendicular to the extension directions of the first straight line and the second straight line.

[0012] As an implementation manner, a plurality of stop members are provided, the plurality of stop members are arranged at intervals in the first direction, and a plurality of third checking arc parts arranged at intervals are further recessed on the other side surface of the stop member, the other side surface being arranged opposite to the side surface provided with the first checking arc part and the second checking arc part,

[0013] In the two adjacent stop members, the center of the third checking arc part of one stop member and the center of the second checking arc part of the other stop member are located on a third straight line, the third straight line is parallel to the first and second straight lines, and the third checking arc part and the second checking arc part enclose a space suitable for positioning the single cylindrical battery.

[0014] As an implementation manner, the distance from the center of the first checking arc part of the other stop member to the side surface of one stop member provided with the third checking arc part is the radius of the single cylindrical battery.

[0015] As an implementation manner, the stop member is located above the single cylindrical battery, the single cylindrical battery is a ring-shaped battery, a plurality of first positioning columns are arranged on the surface of the stop member facing the single cylindrical battery, and the first positioning columns are inserted into the inner hole of the ring-shaped battery.

[0016] As an implementation manner, the distance between the axes of any two adjacent first positioning columns in the plurality of first positioning columns is the diameter of the single cylindrical battery.

[0017] As a realizable mode, geometric centers of part of the first positioning columns are located on a fourth straight line and geometric centers of the remaining part of the first positioning columns are located on a fifth straight line, the fifth straight line is parallel to the fourth straight line, and the extending direction of the fifth straight line is perpendicular to the extending directions of the first and second straight lines.

[0018] As a realizable mode, the limiting piece is provided with a glue pouring port.

[0019] The above scheme exerts a horizontal force on the single cylindrical battery in the box by the limiting piece, limits the placement position of each single cylindrical battery in the box, and avoids affecting the position change of other single cylindrical batteries due to the position change of a single cylindrical battery. The stop piece has a stopping effect on the single cylindrical battery that jumps up, further limiting the placement position of each single cylindrical battery in the box. The limiting piece, the stop piece and the box are simple and convenient to assemble and disassemble, which helps to improve the assembly efficiency of the battery pack. BRIEF DESCRIPTION OF DRAWINGS

[0020] Other features, objects and advantages of the application will become more apparent after reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0021] Figure 1 A structure schematic view of the positioning tool provided by the embodiment of the utility model is shown in the figure;

[0022] Figure 2 A horizontal cross-sectional view of the box provided by the embodiment of the utility model is shown in the figure;

[0023] Figure 3 A structure schematic view of the limiting piece provided by the embodiment of the utility model is shown in the figure;

[0024] Figure 4 A structure schematic view of the first stop plate provided by the embodiment of the utility model is shown in the figure; Figure 1 ;

[0025] Figure 5 A structure schematic view of the first stop plate provided by the embodiment of the utility model is shown in the figure; Figure 2 ;

[0026] The limiting piece 10, the first limiting circular arc part 11, the second limiting circular arc part 12, the glue pouring port 13 and the first through hole 14;

[0027] The stop piece 20, the first stop plate 21, the first checking circular arc part 211, the second checking circular arc part 212, the third checking circular arc part 213, the first positioning column 214, the second through hole 215 and the second stop plate 22;

[0028] Bolt 40, single cylindrical battery 50, first straight line Z1, second straight line Z2, third straight line Z3, fourth straight line Z4, fifth straight line Z5. Detailed Implementation

[0029] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] At least see Figures 1-5 As shown, this utility model provides a positioning fixture for positioning individual cylindrical batteries 50 in a battery pack. The battery pack includes a box with an open top, and multiple individual cylindrical batteries 50 are arranged inside the box. The axes of the individual cylindrical batteries 50 are vertically aligned, and the axes of each individual cylindrical battery 50 are parallel.

[0032] Among them, such as Figure 2 As shown, the casing contains several individual cylindrical batteries 50 arranged in an array. The rectangular array consists of N rows, where N is a positive integer. Odd-numbered rows contain 3 individual cylindrical batteries 50, and even-numbered rows contain 4 individual cylindrical batteries 50. A single cylindrical battery 50 in an odd-numbered row is positioned between two adjacent individual cylindrical batteries 50 in an even-numbered row. The odd and even rows are arranged alternately to form the rectangular array described above. It should be noted that the rectangular array arrangement of the individual cylindrical batteries 50 can be, but is not limited to, the above arrangement.

[0033] There is a first accommodating chamber between the left side wall of the housing and the array of cylindrical individual cells 50, and there is a second accommodating chamber between the right side wall of the housing and the array of cylindrical individual cells 50.

[0034] The following embodiment illustrates the arrangement of three individual cylindrical batteries 50 in odd-numbered rows and four individual cylindrical batteries 50 in even-numbered rows, with the odd-numbered and even-numbered rows alternating to form a rectangular array.

[0035] The positioning fixture includes a limiting member 10 and a stop member 20. Multiple parallel limiting arc portions are recessed on one side of the limiting member 10. The limiting member 10 is positioned between the individual cylindrical battery 50 and the side wall of the housing, and is detachably connected to the housing. The curvature of the limiting arc portions matches the curvature of the side of the individual cylindrical battery 50, and each limiting arc portion is correspondingly positioned on the side of the corresponding individual cylindrical battery 50.

[0036] The stopper 20 is used to press on the at least partial monomer cylindrical batteries 50, and is detachably connected with the box.

[0037] As shown in Figures 1-2 , the first accommodating chamber is correspondingly arranged with one limiting piece 10, and the second accommodating chamber is correspondingly arranged with another limiting piece 10. The limiting piece 10 is provided with a plurality of first through holes 14, as shown in Figure 3 , each first through hole 14 is correspondingly arranged with a bolt 40, the bolt 40 extends into the interior of the side wall of the box through the first through hole 14, and is threadedly connected with the side wall of the box.

[0038] As shown in Figure 3 , the opposite side surface of the limiting piece 10 is recessed to form a plurality of first limiting arc portions 11 and second limiting arc portions 12 which are arranged side by side in the front-rear direction, and the first limiting arc portions 11 and the second limiting arc portions 12 are arranged alternately and continuously. As shown in Figure 1 and Figure 2 , the center of each first limiting arc portion 11 is located on a first straight line Z1, and the center of each second limiting arc portion 12 is located on a second straight line Z2, the second straight line Z2 and the first straight line Z1 both extend in the front-rear direction, and are arranged in a spaced manner. In this way, each first limiting arc portion 11 abuts against the side surface of each monomer cylindrical battery 50 in the first row, and each second limiting arc portion 12 abuts against the side surface of each monomer cylindrical battery 50 in the second row.

[0039] The first limiting arc portions 11 of the two limiting pieces 10 are arranged in alignment in a first direction, the second limiting arc portions 12 of the two limiting pieces 10 are arranged in alignment in the first direction, and the first direction is perpendicular to the extending directions of the first straight line Z1 and the second straight line Z2.

[0040] As shown in Figure 1 , the first limiting arc portions 11 of the limiting piece 10 on the left side are arranged in alignment with the first limiting arc portions 11 of the limiting piece 10 on the right side in the left-right direction, and the second limiting arc portions 12 of the limiting piece 10 on the left side are arranged in alignment with the second limiting arc portions 12 of the limiting piece 10 on the right side in the left-right direction. In this way, the monomer cylindrical batteries 50 can be arranged alternately in odd-numbered rows and even-numbered rows.

[0041] It should be noted that the limiting piece 10 on the left side applies a rightward force to the monomer cylindrical batteries 50 in the first row and the second row, and the limiting piece 10 on the right side applies a leftward force to the monomer cylindrical batteries 50 in the Nth row and the N-1th row, so that each monomer cylindrical battery 50 is subjected to a bidirectional force, thereby limiting the placement position of each monomer cylindrical battery 50 in the box, and avoiding the influence of the position change of a certain monomer cylindrical battery 50 on the position change of other monomer cylindrical batteries 50.

[0042] Of course, it can be understood that in some embodiments, only a plurality of first limiting arc portions 11 are recessed on the opposite side of the limiting member 10, and the first limiting arc portions 11 abut against the side surface of each single cylindrical battery 50 in the first row.

[0043] The stopper 20 can be but is not limited to a plate shape, and the stopper 20 includes two first stop plates 21 and a plurality of second stop plates 22, which are arranged in the first direction. The second stop plate 22 is of the same structure as the first stop plate 21.

[0044] As shown in Figure 1 , Figure 4 and Figure 5 , the two first stop plates 21 are respectively arranged close to the left limiting member 10 and the right limiting member 10, and the plurality of second stop plates 22 are arranged between the two first stop plates 21 and are arranged in parallel in the left-right direction. The first stop plate 21 and the second stop plate 22 are located at the opening of the box body, and the first stop plate 21 is provided with a plurality of second through holes 215, and each second through hole 215 is provided with a bolt 40, and the bolt 40 extends into the interior of the side wall of the box body through the second through hole 215 and is threadedly connected with the side wall of the box body. The second stop plate 22 is provided with a third through hole, and each third through hole is provided with a bolt 40, and the bolt 40 extends into the interior of the side wall of the box body through the third through hole and is threadedly connected with the side wall of the box body.

[0045] In this way, the first stop plate 21 and the second stop plate 22 are arranged at the opening of the box body, and the first stop plate 21 and the second stop plate 22 have a downward pressing effect on the single cylindrical battery 50. When the left limiting member 10 exerts a rightward force on the single cylindrical batteries 50 in the first row and the second row, and the right limiting member 10 exerts a leftward force on the single cylindrical batteries 50 in the Nth row and the N-1th row, the single cylindrical batteries 50 in the Ith row (2<I<N-1, I is a positive integer) may jump up, and the first stop plate 21 and the second stop plate 22 have a stopping effect on the jumping single cylindrical battery 50, further limiting the placement position of each single cylindrical battery 50 in the box body.

[0046] In actual application, as shown in Figure 1 and Figure 3 , the limiting member 10 is further provided with a glue pouring port 13. After the assembly between the limiting member 10, the first stop plate 21, the second stop plate 22 and the box body is completed, glue is poured into the box body through the glue pouring port 13, the glue fills the gaps between the single cylindrical batteries 50, and after the glue solidifies, the single cylindrical batteries 50 arranged in a rectangular array are integrally connected with the box body. Then, the limiting member 10, the first stop plate 21 and the second stop plate 22 are removed from the box body for repeated use.

[0047] The assembling and disassembling of the limiting piece 10, the first stop plate 21, the second stop plate 22 and the box body is simple and convenient, which helps to improve the assembly efficiency of the battery pack. Meanwhile, the first stop plate 21 and the second stop plate 22 have simple structure, which helps to reduce the processing cost of the positioning tool.

[0048] As an implementation manner, a plurality of inspection arc sections are formed on the side surface of the first stop plate 21 opposite to the limiting piece 10, each inspection arc section has an arc degree matched with the arc degree of the side surface of the single cylindrical battery 50, and the inspection arc sections and the corresponding cylindrical battery single cylindrical battery 50 are coaxially arranged.

[0049] As shown in Figure 4 and Figure 5 , a plurality of first inspection arc sections 211 and second inspection arc sections 212 are formed on the side surface of the first stop plate 21 opposite to the limiting piece 10, the first inspection arc sections 211 and the second inspection arc sections 212 are arranged side by side in the front-rear direction and are arranged alternately and continuously. As shown in Figure 1 and Figure 2 , the center of each first inspection arc section 211 is located on the second straight line Z2, and the center of each second inspection arc section 212 is located on the first straight line Z1. The first limiting arc section 11 and the second inspection arc section 212 enclose a cylindrical space suitable for positioning the single cylindrical battery 50; the second limiting arc section 12 and the first inspection arc section 211 enclose another cylindrical space suitable for positioning the single cylindrical battery 50. The side surfaces of the two cylindrical spaces are in contact with each other.

[0050] In this way, each first inspection arc section 211 is arranged corresponding to each single cylindrical battery 50 in the second row, and the first inspection arc section 211 checks the position of the corresponding single cylindrical battery 50 to ensure the accurate placement position; each second limiting arc section 12 is arranged corresponding to each single cylindrical battery 50 in the first row, and the second inspection arc section 212 checks the position of the corresponding single cylindrical battery 50 to ensure the accurate placement position. Further, the placement positions of the single cylindrical batteries 50 in the box are accurate, that is, the adjacent two single cylindrical batteries 50 are arranged in external tangency, which avoids the position change of one single cylindrical battery 50 affecting the position change of other single cylindrical batteries 50.

[0051] As shown in Figure 1 , the corresponding central angle of the first limiting arc section 11 is θ1, 180°≤θ1≤250°, and the corresponding central angle of the second inspection arc section 212 is θ4, θ4+θ1=360°. The corresponding central angle of the first inspection arc section 211 is θ3, 180°≤θ2≤250°, and the corresponding central angle of the second limiting arc section 12 is θ2, θ2+θ3=360°.

[0052] In addition, as shown inFigure 1 , Figure 2 and Figure 4 As shown, the side of the first stop plate 21 opposite to the limiting member 10 is also recessed to form a plurality of third inspection arc portions 213 arranged side by side at intervals in the front-back direction. Since the first stop plate 21 covers the single cylindrical battery cells 50 of the third, fourth, fifth and sixth rows, each third inspection arc portion 213 is arranged corresponding to each single cylindrical battery cell 50 of the seventh row.

[0053] In two adjacent stop members 20, the center of the third inspection arc portion 213 of one stop member 20 and the center of the second inspection arc portion 212 of the other stop member 20 are located on a third straight line. The third straight line is parallel to the first and second straight lines, and the third inspection arc portion 213 and the second inspection arc portion 212 form a space suitable for positioning the single cylindrical battery 50.

[0054] like Figure 1 , Figure 2 and Figure 4 As shown, the side of the first stop plate 21 opposite to the limiting member 10 is recessed to form a third inspection arc portion 213 arranged side by side at intervals in the front-back direction. The leftmost second stop plate 22 is spaced apart from the left first stop plate 21, and the two form a first inspection gap a; the rightmost second stop plate 22 is spaced apart from the right first stop plate 21, and the two form a first inspection gap a.

[0055] The second stop plate 22 has a recessed side facing the first stop plate 21, forming a first inspection arc portion 211 and a second inspection arc portion 212 arranged side by side in the front-rear direction. The first inspection arc portion 211 and the second inspection arc portion 212 are arranged alternately and continuously. Figure 1 and Figure 2 As shown, the center of the third inspection arc portion 213 and the center of the second inspection arc portion 212 are located on the third straight line Z3, and the third inspection arc portion 213 and the second inspection arc portion 212 form a cylindrical space suitable for positioning the single cylindrical battery 50.

[0056] In addition, such as Figure 1 As shown, the distance from the center of the first inspection arc portion 211 to the side of the first stop plate 21 opposite to the limiting member 10 is the radius of the single cylindrical battery 50. In this way, the single cylindrical battery 50 can be limited by the planar area on the side of the first stop plate 21 opposite to the limiting member 10 where the third inspection arc portion 213 is not formed.

[0057] For the third row, the fourth row, the fifth row and the sixth row of the single cylindrical battery 50 which are not detected, the application is provided with a plurality of first positioning columns 214 on the side of the first stop plate 21 facing the single cylindrical battery 50. The single cylindrical battery 50 is a ring-shaped battery, and the first positioning column 214 is inserted into the inner hole of the ring-shaped battery. The inner hole is used for heat dissipation when the single cylindrical battery 50 is working normally.

[0058] The distance between the axes of any two adjacent first positioning columns 214 in the plurality of first positioning columns 214 is the diameter of the single cylindrical battery 50. In this way, each single cylindrical battery 50 is correspondingly provided with a first positioning column 214.

[0059] As shown in Figure 1 and Figure 2 , the geometric centers of part of the first positioning columns 214 in the plurality of first positioning columns 214 and the center of the first limiting circular arc part 11 are located on the fourth straight line Z4, and the geometric centers of the remaining first positioning columns 214 and the center of the second limiting circular arc part 12 are located on the fifth straight line Z5. The fifth straight line Z5 is parallel to the fourth straight line Z4, and both extend in the left-right direction.

[0060] In this way, the third row, the fourth row, the fifth row and the sixth row of the single cylindrical battery 50 are limited by the first positioning columns 214, further ensuring the accurate placement position of each single cylindrical battery 50, and avoiding the change of the position of one single cylindrical battery 50 affecting the change of the position of other single cylindrical batteries 50.

[0061] In addition, as shown in Figure 1 , any two adjacent second stop plates 22 form a second inspection gap b.

[0062] The first inspection gap a and the second inspection gap b have the same effect. As shown in Figure 1 , the glue is poured into the box from the glue pouring port 13, and the glue flows from the left and right sides to the middle. The glue is observed through the first inspection gap a and the second inspection gap b. If the glue is about to overflow from the first inspection gap a and the second inspection gap b, the pouring of the glue is immediately stopped.

[0063] It should be understood that the above-mentioned terms "center", "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0064] The above description is only the preferred embodiment of the present application and the explanation of the technical principles applied. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the utility model. For example, the technical solutions formed by mutually replacing the above-mentioned features and the technical features disclosed in the present application (but not limited to) with similar functions.

Claims

1. A positioning tool for positioning a single cylindrical battery (50) so that a plurality of the single cylindrical batteries (50) are arranged in parallel along an axis, characterized by, The positioning tool comprises a limiting piece (10) and a stop piece (20), One side of the limiting piece (10) is recessed to form limiting arc sections arranged side by side, the limiting arc sections comprise a plurality of first limiting arc sections (11) and a plurality of second limiting arc sections (12), the first limiting arc sections (11) and the second limiting arc sections (12) are arranged alternately, the centers of the first limiting arc sections (11) are located on a first straight line (Z1), the centers of the second limiting arc sections (12) are located on a second straight line (Z2), and the first straight line (Z1) and the second straight line (Z2) are parallel and arranged at intervals. The stop piece (20) is arranged opposite to the limiting piece (10), and a check arc section is recessed on the side of the stop piece (20) opposite to the limiting piece (10), The check arc section comprises a plurality of first check arc sections (211) and a plurality of second check arc sections (212), the first check arc sections (211) and the second check arc sections (212) are arranged alternately, the centers of the first check arc sections (211) are located on the second straight line (Z2), the centers of the second check arc sections (212) are located on the first straight line (Z1), and the first limiting arc sections (11) and the second check arc sections (212) and the second limiting arc sections (12) and the first check arc sections (211) respectively enclose spaces suitable for positioning the single cylindrical battery (50).

2. The positioning tool of claim 1, wherein The first limiting arc sections (11) and the second check arc sections (212) enclose a cylindrical space, the second limiting arc sections (12) and the first check arc sections (211) enclose another cylindrical space, and the sides of the two cylindrical spaces are in contact with each other.

3. The positioning tool of claim 2, wherein The first limiting arc sections (11) and the second limiting arc sections (12) are arranged alternately and continuously, and the first check arc sections (211) and the second check arc sections (212) are arranged alternately and continuously.

4. The positioning tool of claim 1, wherein Two limiting pieces (10) are provided, the two limiting pieces (10) are arranged at intervals, and the stop piece (20) is arranged between the two limiting pieces (10), The first limiting arc sections (11) of the two limiting pieces (10) are arranged in alignment in a first direction, the second limiting arc sections (12) of the two limiting pieces (10) are arranged in alignment in the first direction, and the first direction is perpendicular to the directions of the first straight line (Z1) and the second straight line (Z2).

5. The positioning tool of claim 4, wherein A plurality of stop pieces (20) are provided, and the plurality of stop pieces (20) are arranged at intervals in the first direction, A plurality of third check arc sections (213) are further recessed on the other side of the stop piece (20) and arranged at intervals, and the other side is arranged opposite to the side provided with the first check arc sections (211) and the second check arc sections (212), The center of the third checking arc part (213) of one of the two adjacent stop pieces (20) and the center of the second checking arc part (212) of the other stop piece (20) are located on a third straight line (Z3), the third straight line (Z3) is parallel to the first and second straight lines, and the third checking arc part (213) and the second checking arc part (212) enclose a space suitable for positioning the single cylindrical battery (50).

6. The positioning fixture of claim 5, wherein The distance from the center of the first checking arc part (211) of the other stop piece (20) to the side of one of the stop pieces (20) provided with the third checking arc part (213) is the radius of the single cylindrical battery (50).

7. The positioning tool of any one of claims 1-6, wherein, The stop piece (20) is located above the single cylindrical battery (50), and the single cylindrical battery (50) is a ring-shaped battery, A plurality of first positioning columns (214) are arranged on the surface of the stop piece (20) facing the single cylindrical battery (50), and the first positioning columns (214) are inserted into the inner hole of the ring-shaped battery.

8. The positioning fixture of claim 7, wherein, The distance between the axes of any two adjacent first positioning columns (214) is the diameter of the single cylindrical battery (50).

9. The positioning fixture of claim 7, wherein, The geometric centers of part of the first positioning columns (214) and the center of the first limiting arc part (11) are located on a fourth straight line (Z4), and the geometric centers of the remaining first positioning columns (214) and the center of the second limiting arc part (12) are located on a fifth straight line (Z5), the fifth straight line (Z5) is parallel to the fourth straight line (Z4), and the extension direction of the fifth straight line (Z5) is perpendicular to the extension directions of the first and second straight lines.

10. The positioning tool of any one of claims 1-6, wherein, A glue pouring port (13) is arranged on the limiting piece (10).

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