Cylindrical battery roll core welding tension test tool

Abstract

The utility model provides a kind of cylindrical battery roll core welding tension test tool, it is related to battery testing technical field, including connecting seat and locking piece, wherein, the quantity of connecting seat is two, two are provided with accommodating groove on the connecting seat, two The accommodating groove is oppositely arranged, reference center point is provided in the accommodating groove, two The accommodating groove is used for accommodating the two ends of cylindrical battery respectively;The quantity of locking piece is multiple, and at least three locking pieces are provided on each connecting seat.The utility model is inserted by setting two connecting seats for the two ends of cylindrical battery, after insertion, by multiple locking pieces respectively act, to cooperate the end of battery fixed by clamping, specifically adopt the form of around battery end portion, and contact battery end portion from each direction, to realize fixed action, this kind of setting can adapt to different sizes of cylindrical battery to carry out tension test operation, can effectively reduce the quantity of required test tool, more convenient for management.

Description

Technical Field

[0001] This utility model relates to the field of battery testing technology, and in particular to a welding tensile testing fixture for cylindrical battery cores. Background Technology

[0002] Currently, cylindrical batteries are becoming increasingly larger. Large cylindrical batteries generally adopt a flattened or pressed structure with all tabs. In order to save costs and battery space, many batteries use a single-through structure in the casing. After the core is inserted into the casing, the casing and the core are connected by connecting one end of the flattened core to the bottom of the casing through laser penetration welding. Since the welding point is inside the casing, the welding tensile test is the most important way to evaluate the welding effect of the battery.

[0003] In existing technologies, welding tensile testing is often achieved by fixing both ends of a cylindrical battery and pulling on the ends. For example, a tensile testing fixture for cylindrical batteries (publication number CN219065087U) performs tensile testing by clamping both ends of the cylindrical battery and stretching them. However, the above solution is not adaptable to cylindrical batteries of different sizes. Testing different sized cylindrical batteries requires setting up corresponding fixtures, which undoubtedly increases testing costs and is inconvenient for management. Utility Model Content

[0004] In view of this, the present invention proposes a tensile testing fixture for welding cylindrical battery cores. By setting two connecting seats, the two ends of the cylindrical battery are inserted. After insertion, multiple locking components are activated to clamp and fix the ends of the battery. Specifically, the locking components are arranged around the ends of the battery and contact the ends of the battery from all directions to achieve the fixing action. This setting can be adapted to cylindrical batteries of different sizes for tensile testing, effectively reducing the number of testing fixtures required and making management easier.

[0005] The technical solution of this utility model is achieved as follows: This utility model provides a welding tensile testing fixture for cylindrical battery cores, including a connecting seat and a locking component, wherein... There are two connectors, each with a receiving groove. The two receiving grooves face each other and a reference center point is provided in each receiving groove. The two receiving grooves are used to receive the two ends of the cylindrical battery, respectively. The number of locking components is multiple, and each connector is provided with at least three locking components. The locking components are arranged around the connector with the reference center point as the center. The locking components include a clamping end, which can move toward the reference center point and cooperate with the multiple clamping ends to fix the end of the cylindrical battery.

[0006] Based on the above technical solutions, preferably, the multiple locking components are distributed at equal angles with the reference center point as the center of rotational symmetry.

[0007] Based on the above technical solutions, preferably, the connecting seat is provided with a reference circle centered on a reference center point, the reference circle is located outside the receiving groove, and the clamping end can move along the radius of the reference circle.

[0008] Based on the above technical solutions, preferably, the multiple locking elements on the connector are all located on the same plane, and the plane is perpendicular to the end of the cylindrical battery.

[0009] Based on the above technical solutions, preferably, the locking component further includes a connecting rod, which is disposed on the connecting seat and extends to the outside of the connecting seat and the receiving groove at both ends, respectively. The clamping end is disposed on the end of the connecting rod located in the receiving groove.

[0010] More preferably, the locking component further includes a rotating component, the connecting rod and the connecting seat are connected by a thread, the rotating component is disposed on the end of the connecting rod located outside the connecting seat, and the rotating component is used to drive the connecting rod to rotate.

[0011] Based on the above technical solutions, preferably, an adjustment component is also included, which is disposed on one of the two connectors and is used to connect the test equipment to adjust the posture of the cylindrical battery.

[0012] More preferably, the adjustment assembly includes a fixed plate and a sliding member, wherein, The fixing plate is fixed to one of the two connecting seats, and is opposite to the side of the connecting seat where the receiving groove is provided; The sliding component is movably mounted on the fixed plate.

[0013] More preferably, the fixed plate has a sliding groove, the sliding member extends into the sliding groove, and is slidably connected to the fixed plate through the sliding groove.

[0014] The cylindrical battery core welding tensile testing fixture of this invention has the following advantages over the prior art: (1) By setting two connecting seats, the two ends of the cylindrical battery are inserted. After insertion, multiple locking parts are activated to clamp and fix the end of the battery. Specifically, the battery ends are surrounded and contact the battery ends from all directions to achieve the fixing action. This setting can be adapted to cylindrical batteries of different sizes for tensile testing, which can effectively reduce the number of test fixtures required and make management easier. (2) Move the clamping end along the radius of the reference circle. By moving linearly along the radius of the reference circle, the most efficient vertical clamping of the battery can be achieved. At the same time, the contact area between the clamping end and the battery is reduced in the non-vertical state, thus improving the clamping stability. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Fig. 1 This is a perspective view of the cylindrical battery core welding tensile testing fixture of this utility model; Fig. 2 This is a perspective view of the connecting seat for the welding tensile testing fixture of the cylindrical battery core of this utility model; Fig. 3 This is a side view of the connecting seat of the cylindrical battery core welding tensile testing fixture of this utility model. Detailed Implementation

[0017] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0018] like Figs. 1-3 As shown, the cylindrical battery core welding tensile testing fixture of this utility model includes a connecting seat 1 and a locking component 2.

[0019] There are two connectors 1, and each connector 1 is provided with a receiving groove 101. The two receiving grooves 101 are arranged facing each other. A reference center point is provided in the receiving groove 101. The two receiving grooves 101 are respectively used to accommodate the two ends of the cylindrical battery.

[0020] In some embodiments, the connector 1 is made of stainless steel, and the receiving groove 101 inside it is cylindrical. The minimum inner diameter of the receiving groove 101 is greater than the maximum diameter of the cylindrical battery to be tested, so that it can match the largest cylindrical battery. For cylindrical batteries of different lengths, the relative distance between the two connectors 1 can be adjusted accordingly.

[0021] There are multiple locking elements 2, and each connecting seat 1 is provided with at least three locking elements 2. The locking elements 2 are arranged around the connecting seat 1 with the reference center point as the center. The locking elements 2 include clamping ends 21, which can move toward the reference center point and fix the end of the cylindrical battery through multiple clamping ends 21.

[0022] In some embodiments, the locking member 2 is made of the same fixing material as the connecting seat 1. For each connecting seat 1, there are four locking members 2. The reference center point is located on the central axis of the cylindrical receiving groove 101. That is, the four locking members 2 are arranged around the inner wall of the receiving groove 101, and the corresponding four clamping ends 21 are located in the receiving groove. When clamping and fixing, the four clamping ends 21 simultaneously contact and squeeze the end of the battery to complete the fixing.

[0023] In a specific bottom welding tensile test, firstly, a portion of the aluminum shell is torn off from one end of the battery, exposing the internal core. Then, both ends are placed in two connecting seats 1 respectively, and the two ends of the battery are fixed by locking parts 2. It should be noted that one locking part 2 is used to fix the core, and the other locking part 2 is used to fix the aluminum shell of the cylindrical battery. Then, one of the two connecting seats 1 is pulled along the length of the battery by external equipment, so that the two connecting seats 1 are moved away from each other, and the tensile test is performed during this process.

[0024] For devices that use externally supplied tension, one of the connecting seats 1 can be fixed by setting up a workbench, and the linear mobile device can be connected through the other connecting seat 1. A tension sensor or similar device can be installed on the linear mobile device to collect data.

[0025] In some embodiments, the plurality of locking members 2 are distributed at equal angles with the reference center point as the center of rotational symmetry. This arrangement can apply a more uniform clamping force to the battery when each locking member 2 is used to clamp the battery end, avoiding the situation where the pressure of a single locking member 2 on the battery is too great and causes deformation, thereby improving the accuracy and stability of the test.

[0026] In one specific embodiment, the connecting seat 1 is provided with a reference circle centered on a reference center point. The reference circle is located outside the receiving groove 101. The clamping end 21 can move along the radius of the reference circle. The diameter of the reference circle is larger than the inner diameter of the receiving groove 101. Both the reference circle and the receiving groove 101 are centered on the reference center point. By moving linearly along the radius of the reference circle, the clamping end 21 achieves the most efficient vertical clamping of the battery. At the same time, it avoids the contact area between the clamping end 21 and the battery becoming smaller in a non-vertical state, thus improving the clamping stability.

[0027] In some embodiments, the multiple locking members 2 on the connecting seat 1 are all located on the same plane, and the plane is perpendicular to the end of the cylindrical battery. This arrangement allows the forces applied to the battery by each locking member 2 during the clamping process to cooperate to the maximum extent, and makes each clamping force oriented towards the reference center point, further improving the clamping stability.

[0028] In some specific embodiments, the locking member 2 further includes a connecting rod 22, which is disposed on the connecting seat 1 and extends to the outside of the connecting seat 1 and into the receiving groove 101 at both ends, and the clamping end 21 is disposed on the end of the connecting rod 22 located in the receiving groove 101.

[0029] The connecting rod 22 can provide stable guidance for the clamping end 21 and support it. During the clamping process, the relative force on the clamping end 21 will also be transmitted to the connecting seat 1 through the connecting rod 22.

[0030] In some embodiments, the connecting rod 22 can be configured as the output end of a driving component such as a cylinder or electric push rod to achieve automated clamping.

[0031] In some other embodiments, in order to enable the connecting rod 22 to push the clamping end 21 to clamp the battery end, the locking member 2 further includes a rotating member 23. The connecting rod 22 is connected to the connecting seat 1 by a thread. The rotating member 23 is disposed on the end of the connecting rod 22 located outside the connecting seat 1. The rotating member 23 is used to drive the connecting rod 22 to rotate.

[0032] Through its threaded connection, the operator can rotate the rotating part 23 to drive the connecting rod 22 to rotate, so that the clamping end 21 can move toward or away from the reference center point. The rotating part 23 can be set as a knob, especially as a butterfly knob, etc. In addition, the rotating part 23 can also be used as a motor drive adapter to realize battery clamping through electronic control.

[0033] In some embodiments, an adjustment component 3 is also provided, which is disposed on one of the two connecting seats 1 for connecting a test device, i.e., a device that provides tension, to adjust the posture of the cylindrical battery.

[0034] Considering that the battery may tilt after being fixed, the adjustment component 3 can be set to keep the battery in a vertical position.

[0035] Specifically, the adjustment component 3 includes a fixed plate 31 and a sliding member 32. The fixed plate 31 is fixed on one of the two connecting seats 1 and is opposite to the side of the connecting seat 1 where the receiving groove 101 is provided. The sliding member 32 is movably disposed on the fixed plate 31.

[0036] Part of the slider 32 can be set as a plate and connected to the device that provides tension through a clamping structure. For position adjustment on a plane, such as the XY plane, it can be achieved by adjusting the position of the slider 32 on the clamping structure and cooperating with the sliding of the slider 32 on the fixed plate 31.

[0037] In order to enable the slider 32 to slide on the fixed plate 31, the fixed plate 31 is provided with a sliding groove 311, the slider 32 extends into the sliding groove 311, and is slidably connected to the fixed plate 31 through the sliding groove 311.

[0038] The slide groove 311 can be set as a dovetail shape or a T-shape, and the corresponding sliding member 32 needs to be adapted to the slide groove 311.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A welding tensile testing fixture for cylindrical battery cores, characterized in that: Includes a connecting base (1) and a locking element (2), wherein, There are two connectors (1), and each connector (1) is provided with a receiving groove (101). The two receiving grooves (101) are arranged facing each other. A reference center point is provided in the receiving groove (101). The two receiving grooves (101) are respectively used to receive the two ends of the cylindrical battery. The number of locking elements (2) is multiple, and each connecting seat (1) is provided with at least three locking elements (2). The locking elements (2) are arranged around the connecting seat (1) with the reference center point as the center. The locking elements (2) include clamping ends (21). The clamping ends (21) can move toward the reference center point and cooperate with the multiple clamping ends (21) to fix the end of the cylindrical battery.

2. The welding tensile testing fixture for cylindrical battery cores as described in claim 1, characterized in that: The multiple locking elements (2) are distributed at equal angles with the reference center point as the center of rotational symmetry.

3. The welding tensile testing fixture for cylindrical battery cores as described in claim 1, characterized in that: The connecting seat (1) is provided with a reference circle centered on the reference center point. The reference circle is located outside the receiving groove (101), and the clamping end (21) can move along the radius of the reference circle.

4. The welding tensile testing fixture for cylindrical battery cores as described in claim 1, characterized in that: The multiple locking elements (2) on the connector (1) are all located on the same plane, and the plane is perpendicular to the end of the cylindrical battery.

5. The welding tensile testing fixture for cylindrical battery cores as described in claim 1, characterized in that: The locking member (2) also includes a connecting rod (22), which is disposed on the connecting seat (1) and extends to the outside of the connecting seat (1) and the receiving groove (101) at both ends respectively. The clamping end (21) is disposed on the end of the connecting rod (22) located in the receiving groove (101).

6. The welding tensile testing fixture for cylindrical battery cores as described in claim 5, characterized in that: The locking component (2) also includes a rotating component (23). The connecting rod (22) is connected to the connecting seat (1) by a thread. The rotating component (23) is located on the end of the connecting rod (22) located outside the connecting seat (1). The rotating component (23) is used to drive the connecting rod (22) to rotate.

7. The welding tensile testing fixture for cylindrical battery cores as described in claim 1, characterized in that: It also includes an adjustment component (3), which is disposed on one of the two connectors (1) for connecting the test equipment to adjust the attitude of the cylindrical battery.

8. The welding tensile testing fixture for cylindrical battery cores as described in claim 7, characterized in that: The adjustment assembly (3) includes a fixed plate (31) and a sliding member (32), wherein, The fixing plate (31) is fixed on one of the two connecting seats (1) and is opposite to the side of the connecting seat (1) where the receiving groove (101) is provided; The sliding element (32) is movably mounted on the fixed plate (31).

9. The welding tensile testing fixture for cylindrical battery cores as described in claim 8, characterized in that: The fixed plate (31) has a groove (311) and the sliding member (32) extends into the groove (311) and is slidably connected to the fixed plate (31) through the groove (311).

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