Cylindrical battery formation and capacity grading clamp

Abstract

The utility model provides a cylindrical battery formation and capacity grading clamp, and relates to the field of batteries. The cylindrical battery formation and capacity grading clamp comprises a clamp base, at least one battery cell placement position is formed on the clamp base, and the battery cell placement position is used for placing a battery cell; the upper pressing plate is arranged at the top of the clamp base, the distance between the upper pressing plate and the clamp base is adjustable, and the upper pressing plate is provided with an initial position far away from the battery cell and a pressing position abutting against the battery cell; and the locking mechanism has a locking state for locking the upper pressing plate and the clamp base and a releasing state for releasing the upper pressing plate and the clamp base. According to the technical scheme, the distance between the upper pressing plate and the clamp base is adjustable, and the locking mechanism is arranged, so that the cabinet loading and unloading efficiency of the battery cell is improved, various abnormities caused by untight connection of the battery cell and the clamp base are reduced, the quality is improved, and the efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of batteries, in particular to a cylindrical battery capacity clamp. Background Art

[0002] After manufacturing, lithium-ion batteries need to be subjected to high-temperature formation to activate the battery active materials. Due to the limited space in the formation cabinet, the existing button-type formation fixtures are inconvenient to operate when loading and unloading the cabinet, and the time required for loading and unloading the cabinet is too long, resulting in low production efficiency.

[0003] With regard to the problems in the prior art of lithium-ion batteries being put in and taken out of cabinets for a long time and having low production efficiency, no effective solution has been proposed so far. Utility Model Content

[0004] The main purpose of the utility model is to provide a cylindrical battery capacity clamp to solve the problem that the lithium-ion battery loading and unloading time is too long and the production efficiency is low in the prior art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a cylindrical battery cell component clamp is provided, comprising: a clamp base, on which at least one battery cell placement position is provided, and the battery cell placement position is used to place the battery cell; an upper pressure plate, the upper pressure plate is arranged on the top of the clamp base, and the distance between the upper pressure plate and the clamp base can be adjusted, and the upper pressure plate has an initial position away from the battery cell and a pressing position abutting against the battery cell; a locking mechanism, the locking mechanism has a locking state in which the upper pressure plate is locked with the clamp base, and a releasing state in which the upper pressure plate and the clamp base are released.

[0006] Furthermore, the upper pressing plate is movably connected to the clamp base along the height direction of the clamp base to adjust the distance between the upper pressing plate and the clamp base.

[0007] Furthermore, the locking mechanism also includes: a spring column, the first end of the spring column passes through the upper pressure plate and abuts against the battery cell, the second end of the spring column extends to the outside of the clamp base, when the upper pressure plate is in the initial position, the spring on the spring column is in the initial state, when the upper pressure plate moves toward the side where the clamp base is located, the spring on the spring column is in a compressed state.

[0008] Furthermore, the locking mechanism includes: locking grooves, there are two locking grooves, and one locking groove is respectively opened on the side walls on the opposite sides of the clamp base; connecting rods, there are two connecting rods, the connecting rods are arranged corresponding to the locking grooves, the first end of the connecting rod is movably connected to the upper pressure plate, and the second end of the connecting rod is provided with a moving part, the moving part extends into the locking groove, and the moving part can move along the length direction and width direction of the locking groove; the locking groove has an upper stop point and a lower stop point, when the moving part is at the upper stop point, the upper pressure plate is in the initial position, and when the moving part is at the lower stop point, the upper pressure plate is in the clamping position.

[0009] Furthermore, the locking groove includes a first groove body, a second groove body, a third groove body, and a fourth groove body which are connected end to end in sequence. The length directions of the first groove body, the second groove body, the third groove body, and the fourth groove body are arranged at an angle with the width direction and the height direction of the clamp base, and along the height direction of the clamp base, the connecting position of the first groove body and the fourth groove body is the upper stop point of the locking groove, and the connecting position of the second groove body and the third groove body is the lower stop point of the locking groove. The height of the upper stop point in the height direction of the clamp base is greater than the height of the lower stop point in the height direction of the clamp base.

[0010] Furthermore, along the height direction of the clamp base, the height of the lower dead point is greater than the height setting of the connection position between the first slot body and the second slot body, and the height of the lower dead point is greater than the height setting of the connection position between the third slot body and the fourth slot body.

[0011] Furthermore, the cylindrical battery cell capacity clamp also includes: a side fixing plate, at least one side fixing plate, which is connected to at least one of the clamp base and the upper pressure plate to form a limiting space between the side fixing plate and the clamp base or the upper pressure plate, and at least part of the connecting rod is arranged in the limiting space.

[0012] Furthermore, the cylindrical battery cell capacity clamp also includes: a pull rod, at least one pull rod, a first end of the pull rod is connected to the clamp base, the pull rod is extended along the height direction of the clamp base, an upper pressure plate is slidably connected to the pull rod, and the upper pressure plate can slide along the length direction of the pull rod to adjust the distance between the upper pressure plate and the clamp base.

[0013] Furthermore, a negative electrode connecting plate and a negative electrode connecting rod are provided at the bottom of the battery cell placement position, the negative electrode connecting plate is connected to the first end of the negative electrode connecting rod, the negative electrode connecting plate is connected to the negative electrode of the battery cell, and the second end of the negative electrode connecting rod extends outside the clamp base through the clamp base.

[0014] Furthermore, there are two battery cell placement positions, and the two battery cell placement positions are spaced apart along the length direction of the fixture base.

[0015] By applying the technical solution of the utility model, through the setting of the adjustable distance between the upper pressure plate and the clamp base and the setting of the locking mechanism, when the upper pressure plate is adjusted to the clamping position, the locking mechanism is switched to the locking state, and the installation and fixation of the battery cell can be achieved. When the battery cell needs to be removed, the locking mechanism is switched to the release state. At this time, the upper pressure plate is adjusted to the initial position, and the battery cell can be removed, thereby improving the efficiency of loading and unloading the battery cell, reducing various abnormalities caused by loose connection between the battery cell and the clamp base, improving quality, and improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 A schematic structural diagram of a first embodiment of a cylindrical battery capacity splitting fixture according to the utility model is shown;

[0018] Figure 2 A schematic structural diagram of a second embodiment of a cylindrical battery capacity splitting fixture according to the utility model is shown;

[0019] Figure 3 A structural schematic diagram of an embodiment of a locking groove according to the utility model is shown.

[0020] The above drawings include the following reference numerals:

[0021] 1. Fixture base; 100. Battery cell placement position;

[0022] 2. Upper pressing plate;

[0023] 3. Connecting rod; 31. Moving part;

[0024] 4. Fix the screws;

[0025] 5. Side fixing plate;

[0026] 6. Spring column;

[0027] 7. Pull rod;

[0028] 8. Battery cells;

[0029] 9. Negative electrode connecting piece;

[0030] 10. Negative electrode connecting rod;

[0031] 11, locking groove; 111, first groove body; 112, second groove body; 113, third groove body; 114, fourth groove body;

[0032] 12. Bolts;

[0033] A. Top dead center;

[0034] B. Bottom dead center. DETAILED DESCRIPTION

[0035] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0036] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0037] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0038] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of the layers and regions may be enlarged, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0039] Combination Figures 1 to 3 As shown, according to a specific embodiment of the utility model, a cylindrical battery cell capacity conversion fixture is provided.

[0040] The cylindrical battery charging and discharging fixture includes a fixture base 1, an upper pressure plate 2 and a locking mechanism. The fixture base 1 is provided with at least one battery cell placement position 100, and the battery cell placement position 100 is used to place the battery cell 8; the upper pressure plate 2 is arranged on the top of the fixture base 1, and the distance between the upper pressure plate 2 and the fixture base 1 can be adjusted. The upper pressure plate 2 has an initial position away from the battery cell 8 and a pressing position abutting against the battery cell 8; the locking mechanism has a locking state of locking the upper pressure plate 2 and the fixture base 1, and a releasing state of releasing the upper pressure plate 2 and the fixture base 1.

[0041] By adopting the technical solution in the above-mentioned embodiment, through the setting of the adjustable distance between the upper pressure plate 2 and the clamp base 1 and the setting of the locking mechanism, when the upper pressure plate 2 is adjusted to the clamping position, the locking mechanism is switched to the locking state, and the battery cell 8 can be installed and fixed. When the battery cell 8 needs to be removed, the locking mechanism is switched to the release state. At this time, the upper pressure plate 2 is adjusted to the initial position, and the battery cell 8 can be removed, thereby improving the efficiency of loading and unloading the battery cell 8, reducing various abnormalities caused by the loose connection between the battery cell 8 and the clamp base 1, improving quality, and improving efficiency.

[0042] Furthermore, the upper pressing plate 2 is movably connected to the fixture base 1 along the height direction of the fixture base 1 to adjust the distance between the upper pressing plate 2 and the fixture base 1. By making the upper pressing plate 2 movably connected to the fixture base 1 along the height direction of the fixture base 1, the position adjustment function of the upper pressing plate 2 can be realized, and the structure of the cylindrical battery capacity fixture can be simplified to reduce the manufacturing cost.

[0043] It should be understood that the movable connection between the upper pressure plate 2 and the clamp base 1 may include various connection methods such as sliding connection, hinge, connecting rod structure connection, etc. For example, the upper pressure plate 2 and the clamp base 1 can be a gear rack transmission, slider rail connection, elastic connection and other structures.

[0044] Furthermore, the locking mechanism also includes a spring column 6, the first end of the spring column 6 passes through the upper pressure plate 2 and abuts against the battery cell 8, the second end of the spring column 6 extends to the outside of the clamp base 1, and the second end of the spring column 6 is connected to the bolt 12 to limit the upper pressure plate 2 from moving along the height direction of the clamp base 1. When the upper pressure plate 2 is in the initial position, the spring on the spring column 6 is in the initial state, and when the upper pressure plate 2 moves toward the side where the clamp base 1 is located, the spring on the spring column 6 is in a compressed state. Through such a setting, when the upper pressure plate 2 in the clamping position is released by the locking mechanism, it can quickly return to the initial position by virtue of the elastic force of the spring on the spring column 6, thereby improving the efficiency of disassembly and assembly of the battery cell 8.

[0045] Furthermore, the locking mechanism also includes a locking groove 11 and a connecting rod 3. There are two locking grooves 11, and a locking groove 11 is respectively provided on the side walls on the opposite sides of the clamp base 1; there are two connecting rods 3, and the connecting rods 3 are arranged corresponding to the locking groove 11. The first end of the connecting rod 3 is movably connected to the upper pressure plate 2, and the second end of the connecting rod 3 is provided with a moving part 31. The moving part 31 extends into the locking groove 11, and the moving part 31 can move along the length direction and width direction of the locking groove 11; the locking groove 11 has an upper stop point A and a lower stop point B. When the moving part 31 is at the upper stop point A, the upper pressure plate 2 is in the initial position, and when the moving part 31 is at the lower stop point B, the upper pressure plate 2 is in the clamping position. A locking groove 11 is respectively provided on the side walls on the opposite sides of the clamp base 1, which can keep the upper pressure plate 2 balanced and stable, improve the stability of the upper pressure plate 2 and the clamp base 1 during relative movement and the tightness of the upper pressure plate 2 and the clamp base 1 when they are in contact, so as to achieve a better battery formation effect.

[0046] Specifically, the moving part 31 may be a cylindrical structure or a spherical structure.

[0047] Specifically, the locking groove 11 includes a first groove body 111, a second groove body 112, a third groove body 113, and a fourth groove body 114 which are connected in a counterclockwise direction. The length directions of the first groove body 111, the second groove body 112, the third groove body 113, and the fourth groove body 114 are arranged at an angle with the width direction and the height direction of the fixture base 1, and along the height direction of the fixture base 1, the connection position of the first groove body 111 and the fourth groove body 114 is the upper stop point A of the locking groove 11, and the connection position of the second groove body 112 and the third groove body 113 is the lower stop point B of the locking groove 11, and the height of the upper stop point A in the height direction of the fixture base 1 is greater than the height of the lower stop point B in the height direction of the fixture base 1. The locking groove 11 has a simple structure, adopts the buckle principle, is easy to operate, and can improve production efficiency.

[0048] Among them, along the height direction of the clamp base 1, the height of the upper dead point A is greater than the height setting of the connection position between the first slot body 111 and the second slot body 112, and the height of the lower dead point B is greater than the height setting of the connection position between the third slot body 113 and the fourth slot body 114. This setting can realize the position switching of the connecting rod 3 between the upper dead point A and the lower dead point B by pressing the upper pressing plate 2 downward, which is convenient to operate.

[0049] like Figure 3 As shown, Figure 3The direction of the arrow is the movement direction of the moving part 31. The groove widths of the first groove body 111, the second groove body 112, the third groove body 113, and the fourth groove body 114 are all larger than the radial size of the moving part 31, so that the moving part 31 can move along the groove width direction of the first groove body 111, the second groove body 112, the third groove body 113, and the fourth groove body 114. When the upper pressure plate 2 is in the initial position, the moving part 31 is at the upper dead point A, which is the highest point of the locking groove 11. When the upper pressure plate 2 is pressed to move downward, the moving part 31 first moves vertically downward from the upper dead point A, and then moves along the first groove body 111. When the moving part 31 passes through the connection position between the first groove body 111 and the second groove body 112 and enters the second groove body 112, the upper pressure plate 2 moves upward to the lower dead point B by the spring force. At this time, the upper pressure plate 2 is in the clamping position; when the upper pressure plate 2 needs to switch from the clamping position to the initial position, the upper pressure plate 2 is pressed downward, and the upper pressure plate 2 moves along the third groove body 113. After the upper pressure plate 2 reaches the lowest point of the third groove body 113, the upper pressure plate 2 moves to the upper dead point A along the fourth groove body 114 by the spring force, that is, returns to the initial position.

[0050] Furthermore, the cylindrical battery packing fixture further includes a side fixing plate 5, at least one of which is connected to at least one of the fixture base 1 and the upper pressing plate 2 by fixing screws 4, so that a limiting space is formed between the side fixing plate 5 and the fixture base 1 or the upper pressing plate 2, and at least part of the connecting rod 3 is arranged in the limiting space. By providing the side fixing plate 5, the connecting rod 3 can be protected while being movable and limited, and the connecting rod 3 can be prevented from being damaged by external friction and collision.

[0051] Furthermore, the cylindrical battery formation capacity fixture further includes a tie rod 7, at least one tie rod 7, a first end of which is connected to the fixture base 1, the tie rod 7 is extended along the height direction of the fixture base 1, the upper pressing plate 2 is slidably connected to the tie rod 7, and the upper pressing plate 2 can slide along the length direction of the tie rod 7 to adjust the distance between the upper pressing plate 2 and the fixture base 1. The connection between the tie rod 7 and the fixture base 1 allows the relative position of the upper pressing plate 2 and the fixture base 1 to only move in a direction of relative distance, that is, the upper pressing plate 2 can only move in a direction of height of the fixture base 1, making the entire fixture structure more stable, thereby ensuring that the battery formation process is more stable and improving efficiency.

[0052] Furthermore, a negative electrode connecting piece 9 and a negative electrode connecting rod 10 are provided at the bottom of the battery cell placement position 100, the negative electrode connecting piece 9 is connected to the first end of the negative electrode connecting rod 10, the negative electrode connecting piece 9 is connected to the negative electrode of the battery cell 8, and the second end of the negative electrode connecting rod 10 passes through the fixture base 1 and extends outside the fixture base 1. By providing the negative electrode connecting piece 9 and the negative electrode connecting rod 10, the connection between the battery cell 8 and the formation equipment can be ensured, and the battery cell formation work can be realized.

[0053] In one embodiment of the present application, the negative electrode connecting rod 10 is fixedly connected to the clamp base 1 by a bolt 12, but any other fixed connection method for fixing the clamp base 1 and the negative electrode connecting rod 10 can stabilize the clamp structure, such as welding, which can stabilize the battery negative electrode and make the entire clamp structure more stable, thereby ensuring that the battery formation process is more stable and the efficiency is improved.

[0054] Preferably, there are two battery cell placement positions 100, and the two battery cell placement positions 100 are spaced apart along the length direction of the clamp base 1, that is, the two battery cell placement positions 100 are spaced apart side by side with each other, wherein a plurality of battery cell placement positions 100 may also be provided, and each battery cell placement position 100 is spaced apart side by side with each other along the length direction of the clamp base 1, so that according to different needs, multiple battery formation operations can be performed at one time, reducing the number of processes, facilitating operation, and improving efficiency.

[0055] The utility model also provides a preferred embodiment of a cylindrical battery formation fixture. In the practical application of this embodiment, taking a 32140 small cylindrical battery as an example, the cylindrical battery is a lithium-ion battery. This embodiment can form two batteries at a time. The actual working principle is as follows:

[0056] The cylindrical battery formation fixture is fixedly installed in the formation cabinet. Figure 1 As shown, the bolt 12 on the spring column 6 and the negative electrode connecting rod 10 are respectively connected to the positive and negative electrode voltage, current and temperature collection lines of the formation cabinet. When the battery cell 8 needs to be put on the cabinet, two battery cells 8 are placed in the fixture to ensure that the negative electrode of the battery cell 8 contacts the negative electrode connecting piece 9, and then the upper pressing plate 2 is pressed. At this time, the locking mechanism starts to work, fixes the battery cell 8 in the fixture, and starts the formation process, wherein the spring column 6 is tightly connected to the battery cell 8, and the battery cell 8 is tightly connected to the negative electrode connecting piece 9 to ensure that the battery cell 8 is connected to the equipment normally. After the formation process is completed, the upper pressing plate 2 is pressed again, and the locking mechanism works again. After the upper pressing plate 2 of the fixture is ejected, the battery cell 8 can be taken out.

[0057] The specific working principle is divided into a locking process and an ejection process. In the locking process, by pressing the upper pressure plate 2, the connecting rod 3 is driven to move downward in the first slot 111 to a position below the first slot 111, such as Figure 3 As shown, after the pressing stops, the connecting rod 3 will move upward along the second slot body 112 to reach the lower dead point B, and then the upper pressing plate 2 will be stuck; wherein, during the upward movement of the pull rod 7, the connecting rod 3 also moves upward.

[0058] Ejection process: Press the upper pressing plate 2 again, and the connecting rod 3 moves downward in the third slot 113 to the position below the third slot 113, such as Figure 3 As shown, after the pressing stops, the connecting rod 3 will move upward along the fourth slot 114 and finally return to the top dead point A.

[0059] The cylindrical battery capacity clamp in this embodiment improves the efficiency of loading and unloading cells, reduces various abnormalities caused by loose connections, improves quality, and improves efficiency, while also producing the following beneficial effects:

[0060] (1) The use of new formation fixtures can improve the efficiency of battery formation, save time and reduce labor costs.

[0061] (2) Increase the efficiency of loading and unloading batteries without changing the existing formation cabinet structure or affecting product quality, reduce operator errors, and improve battery formation efficiency.

[0062] (3) The structure is simpler and easier to clean.

[0063] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects: the structure is simpler, the efficiency of battery formation and battery cabinet loading and unloading is improved, time and labor costs are saved, and human operating errors are reduced.

[0064] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0065] In addition to the above, it should be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in conjunction with the embodiment included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of the present utility model.

[0066] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0067] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A cylindrical battery capacity fixture, characterized in that: include: A clamp base (1), wherein at least one battery cell placement position (100) is provided on the clamp base (1), and the battery cell placement position (100) is used to place a battery cell (8); An upper pressing plate (2), the upper pressing plate (2) being arranged on the top of the clamp base (1), the distance between the upper pressing plate (2) and the clamp base (1) being adjustable, the upper pressing plate (2) having an initial position away from the battery cell (8) and a pressing position abutting against the battery cell (8); A locking mechanism, wherein the locking mechanism has a locking state in which the upper pressing plate (2) and the clamp base (1) are locked, and a releasing state in which the upper pressing plate (2) and the clamp base (1) are released.

2. The cylindrical battery capacity conversion fixture according to claim 1, characterized in that: The upper pressing plate (2) is movably connected to the clamp base (1) along the height direction of the clamp base (1) so as to adjust the distance between the upper pressing plate (2) and the clamp base (1).

3. The cylindrical battery capacity conversion fixture according to claim 2, characterized in that: The locking mechanism also includes: A spring column (6), wherein the first end of the spring column (6) passes through the upper pressure plate (2) and abuts against the battery cell (8), and the second end of the spring column (6) extends to the outside of the clamp base (1); when the upper pressure plate (2) is in the initial position, the spring on the spring column (6) is in the initial state; when the upper pressure plate (2) moves toward the side where the clamp base (1) is located, the spring on the spring column (6) is in a compressed state.

4. The cylindrical battery capacity conversion fixture according to claim 3, characterized in that: The locking mechanism comprises: A locking groove (11), wherein there are two locking grooves (11), and one locking groove (11) is respectively provided on the side walls on two opposite sides of the clamp base (1); A connecting rod (3), wherein there are two connecting rods (3), the connecting rods (3) are arranged corresponding to the locking groove (11), the first end of the connecting rod (3) is movably connected to the upper pressure plate (2), and the second end of the connecting rod (3) is provided with a moving part (31), the moving part (31) extends into the locking groove (11), and the moving part (31) can move along the length direction and the width direction of the locking groove (11); The locking groove (11) has an upper dead point and a lower dead point. When the moving part (31) is at the upper dead point, the upper pressing plate (2) is at the initial position. When the moving part (31) is at the lower dead point, the upper pressing plate (2) is at the clamping position.

5. The cylindrical battery capacity conversion fixture according to claim 4, characterized in that: The locking groove (11) comprises a first groove body (111), a second groove body (112), a third groove body (113), and a fourth groove body (114) which are connected end to end in sequence. The length directions of the first groove body (111), the second groove body (112), the third groove body (113), and the fourth groove body (114) are arranged at an angle with the width direction of the clamp base (1) and the height direction of the clamp base (1). In addition, along the height direction of the clamp base (1), the connecting position of the first groove body (111) and the fourth groove body (114) is the upper stop point of the locking groove (11), and the connecting position of the second groove body (112) and the third groove body (113) is the lower stop point of the locking groove (11). The height of the upper stop point in the height direction of the clamp base (1) is greater than the height of the lower stop point in the height direction of the clamp base (1).

6. The cylindrical battery capacity conversion fixture according to claim 5, characterized in that: Along the height direction of the clamp base (1), the height of the lower dead point is greater than the height setting of the connection position between the first groove body (111) and the second groove body (112), and the height of the lower dead point is greater than the height setting of the connection position between the third groove body (113) and the fourth groove body (114).

7. The cylindrical battery capacity conversion fixture according to claim 4, characterized in that: The cylindrical battery capacity fixture further comprises: A side fixing plate (5), wherein there is at least one side fixing plate (5), and the side fixing plate (5) is connected to at least one of the clamp base (1) and the upper pressing plate (2), so that a limiting space is formed between the side fixing plate (5) and the clamp base (1) or the upper pressing plate (2), and at least part of the connecting rod (3) is arranged in the limiting space.

8. The cylindrical battery capacity conversion fixture according to claim 1, characterized in that: The cylindrical battery capacity fixture further comprises: A pull rod (7), at least one of the pull rods (7), a first end of which is connected to the clamp base (1), the pull rod (7) is extended along the height direction of the clamp base (1), the upper pressure plate (2) is slidably connected to the pull rod (7), and the upper pressure plate (2) can slide along the length direction of the pull rod (7) to adjust the distance between the upper pressure plate (2) and the clamp base (1).

9. The cylindrical battery capacity conversion fixture according to claim 1, characterized in that: A negative electrode connecting piece (9) and a negative electrode connecting rod (10) are provided at the bottom of the battery cell placement position (100); the negative electrode connecting piece (9) is connected to a first end of the negative electrode connecting rod (10); the negative electrode connecting piece (9) is connected to a negative electrode of the battery cell (8); and the second end of the negative electrode connecting rod (10) passes through the clamp base (1) and extends to the outside of the clamp base (1).

10. The cylindrical battery capacity conversion fixture according to claim 1, characterized in that: There are two battery cell placement positions (100), and the two battery cell placement positions (100) are arranged at intervals along the length direction of the clamp base (1).

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