Concentric positioning and locking tool for battery shell and pole

Abstract

The utility model discloses a concentric positioning and locking tool for a battery shell and a pole, the shell and the pole are locked through a nut, the tool comprises a shell positioning sleeve and a torsion connecting rod, one end of the shell positioning sleeve is provided with a shell accommodating groove, and the other end of the shell positioning sleeve is provided with a connecting rod guide groove; the connecting rod guide groove is communicated with the shell containing groove, one end of the torsion connecting rod extends into the shell containing groove through the connecting rod guide groove, a nut containing groove is formed in the end portion of the torsion connecting rod, and a connecting groove is formed in the other end of the torsion connecting rod and used for being connected with a torsion device. The shell containing groove, the connecting rod guide groove, the nut containing groove and the torsion connecting rod are coaxial. The device has the beneficial effects that the structure is simple, the use is convenient, the concentricity of the battery shell and the pole nut is maintained through the shell positioning sleeve and the torsion connecting rod, large deviation between the battery shell and the pole nut is ensured not to occur, the appearance quality of a battery is ensured, and the assembly yield is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery assembly technical field, concretely relates to a concentric positioning locking tool of battery shell and pole. BACKGROUND

[0002] Lithium ion battery has high specific energy, high voltage, low discharge rate and other advantages, is widely used in various fields, and lithium ion battery is usually composed of positive electrode, negative electrode, diaphragm, electrolyte and battery shell and is provided with a pole at least at one end of the battery shell. The battery shell is assembled with an external pole, and the battery shell is riveted with the pole. The riveting will generate pressure on the battery shell, causing deformation and affecting the performance of the battery. Currently, a pole in the form of a stud is used, and the fastening of the battery shell and the nut is achieved. Although this method can avoid excessive pressure on the battery shell, it cannot guarantee the concentricity of the shell and the pole nut during assembly, which may cause a shift in the relative position, especially when using automated devices for batch assembly. The battery shell is often transported by a conveyor belt, which may cause a transportation deviation, easily leading to a shift in the center of the pole and the nut. If the shift is large, it may affect the overall appearance quality of the battery cell and even affect the welding during subsequent assembly into a battery pack. SUMMARY

[0003] The utility model discloses a concentric positioning locking tool of battery shell and pole, simple structure, convenient to use, through shell positioning sleeve and torsion connecting rod maintain the concentricity of battery shell and pole nut, ensure that the battery shell and the pole nut do not have a large deviation, ensure the appearance quality of the battery, improve the assembly yield.

[0004] The utility model discloses a concentric positioning locking tool of battery shell and pole, the shell and the pole are locked through the nut, the tool includes shell positioning sleeve and torsion connecting rod, one end of shell positioning sleeve is equipped with shell containing groove, the other end of shell positioning sleeve is equipped with connecting rod guide groove, connecting rod guide groove and shell containing groove are communicated, one end of torsion connecting rod is through connecting rod guide groove and is stretched to shell containing groove and its end is equipped with nut containing groove, the other end of torsion connecting rod is equipped with connecting groove and is used for connecting torsion device, shell containing groove, connecting rod guide groove, nut containing groove and torsion connecting rod all coaxial lines.

[0005] In some embodiments, a linear bearing is provided in the connecting rod guide groove, and the torsion connecting rod passes through the linear bearing.

[0006] In some embodiments, the torsion connecting rod is also provided with a radial mounting hole at one end close to the connecting groove, and a limiting screw is mounted in the mounting hole.

[0007] In some embodiments, the torque connecting rod includes a nut locking sleeve and a connecting rod. One end of the nut locking sleeve has a limiting groove, and one end of the connecting rod is inserted into the limiting groove and connected to the nut locking sleeve by a pin. The other end of the nut locking sleeve has a nut receiving groove.

[0008] In some embodiments, the radial cross-section of the nut is polygonal, or the nut is a circular nut with anti-slip protrusions on its side.

[0009] In some embodiments, the housing positioning sleeve is made of insulating material, or an insulating layer is attached to the housing receiving groove.

[0010] Compared with existing technologies, the advantages of this invention are as follows: This invention designs the tooling into two parts: a housing positioning sleeve and a torque connecting rod, which can move and rotate relative to each other. Simultaneously, it ensures that the housing positioning sleeve and the torque connecting rod are relatively concentric. The battery housing is fixed by the housing positioning sleeve, and the nut is fixed by the torque connecting rod. The nut is tightened by the relative rotation between the torque connecting rod and the housing positioning sleeve, thus completing the fastening of the battery housing to the terminal post and greatly ensuring the concentricity of the housing and the terminal post nut. The torque connecting rod can be connected to an external torque wrench for manual assembly or to external automated equipment for automatic assembly.

[0011] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0012] Fig. 1 This is a schematic diagram of the structure of this utility model.

[0013] Fig. 2 This is an exploded view of this utility model.

[0014] Fig. 3 This is a cross-sectional structural diagram of the present invention.

[0015] Fig. 4 This is a cross-sectional structural diagram of the present invention when used for assembling batteries.

[0016] The components include: 1. housing positioning sleeve, 2. connecting rod, 3. linear bearing, 4. limit screw, 5. nut locking sleeve, and 6. pin. Detailed Implementation

[0017] like Figs. 1 to 4As shown, a concentric positioning and locking fixture for a battery casing and a terminal post is disclosed. The casing and terminal post are locked together by a nut. The fixture includes a casing positioning sleeve 1 and a torque connecting rod. One end of the casing positioning sleeve 1 has a casing receiving groove for accommodating the battery casing. Preferably, the inner diameter of the casing receiving groove is equal to or slightly larger than the diameter of the battery casing. The other end of the casing positioning sleeve 1 has a connecting rod guide groove that communicates with the casing receiving groove. One end of the torque connecting rod extends into the casing receiving groove through the connecting rod guide groove, and its end has a nut receiving groove for accommodating a nut. The torque connecting rod can move axially along the connecting rod guide groove. The other end of the torque connecting rod has a connecting groove for connecting to a torque device. Specifically, the torque device can be a torque wrench or an automated device that provides torque. The casing receiving groove, connecting rod guide groove, nut receiving groove, and torque connecting rod are all coaxial. When locking the battery casing to the terminal, first move the casing positioning sleeve 1 upward along the torque connecting rod, place the nut in the nut receiving groove, then slide the casing positioning sleeve 1 downward to put the casing positioning sleeve 1 on the outside of the battery casing, place the nut on the terminal, making the nut and the battery casing concentric, connect the torque connecting rod to the torque device, and drive the nut to rotate through the rotation of the torque connecting rod, thereby tightening the nut on the terminal, realizing the fastening of the battery casing and the terminal. Finally, slide the casing positioning sleeve 1 upward to disengage it from the battery casing, remove the torque connecting rod upward to disengage the torque connecting rod from the nut.

[0018] In some embodiments, a linear bearing 3 is provided in the guide groove of the connecting rod, and the torque connecting rod passes through the linear bearing 3. By providing the linear bearing 3, the friction between the housing positioning sleeve 1 and the torque connecting rod is reduced, thereby improving the service life of the tooling.

[0019] In some embodiments, the torque connecting rod has a radial mounting hole at one end near the connecting groove, and a limiting screw 4 is installed in the mounting hole. When the housing positioning sleeve 1 moves upward along the torque connecting rod, the limiting screw 4 can limit the movement of the housing positioning sleeve 1.

[0020] In some embodiments, the torque connecting rod includes a nut locking sleeve 5 and a connecting rod 2. One end of the nut locking sleeve 5 has a limiting groove, and one end of the connecting rod 2 is inserted into the limiting groove and connected to the nut locking sleeve 5 via a pin 6. The other end of the nut locking sleeve 5 has a nut receiving groove. In use, the nut locking sleeve 5 is located within the housing receiving groove, and the housing positioning sleeve 1 can move along the axial direction of the connecting rod 2. The nut locking sleeve 5 and the connecting rod 2 are detachably connected for easy disassembly and replacement.

[0021] In some embodiments, the radial cross-section of the nut is polygonal, or the nut is a circular nut with anti-slip protrusions on its side. The shape of the nut receiving groove matches the shape of the nut. Using a nut with a polygonal cross-section or providing anti-slip protrusions on the side of a circular nut can prevent the nut from rotating relative to the nut receiving groove, making it easier to tighten the nut using a torque connecting rod.

[0022] In some embodiments, the housing positioning sleeve 1 is made of an insulating material, specifically, it can be a non-metallic material such as nylon or POM, or an insulating layer can be attached to the housing receiving groove, specifically, the insulating layer can be a Teflon layer. The housing positioning sleeve 1 is insulated from the battery housing to prevent the battery housing from being electrically connected to the terminal post.

[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0026] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A concentric positioning and locking fixture for a battery casing and a terminal post, characterized in that: The shell is locked with the pole by a nut, the tool comprises a shell positioning sleeve and a torsion connecting rod, one end of the shell positioning sleeve is provided with a shell accommodating groove, the other end of the shell positioning sleeve is provided with a connecting rod guide groove, the connecting rod guide groove is communicated with the shell accommodating groove, one end of the torsion connecting rod extends into the shell accommodating groove through the connecting rod guide groove and the end thereof is provided with a nut accommodating groove, the other end of the torsion connecting rod is provided with a connecting groove for connecting a torsion device, and the shell accommodating groove, the connecting rod guide groove, the nut accommodating groove and the torsion connecting rod are coaxial.

2. The concentric positioning and locking tool for battery case and pole as claimed in claim 1, wherein: A linear bearing is arranged in the connecting rod guide groove, and the torsion connecting rod passes through the linear bearing.

3. The concentric positioning and locking tool for battery case and pole as claimed in claim 1, wherein: A radial mounting hole is further arranged in the end of the torsion connecting rod close to the connecting groove, and a limiting screw is mounted in the mounting hole.

4. The concentric positioning and locking tool for battery case and pole as claimed in claim 1, wherein: The torsion connecting rod comprises a nut locking sleeve and a connecting rod, one end of the nut locking sleeve is provided with a limiting groove, one end of the connecting rod is inserted into the limiting groove and connected with the nut locking sleeve through a pin shaft, and the other end of the nut locking sleeve is provided with a nut accommodating groove.

5. The concentric positioning and locking tool for battery case and pole as claimed in claim 1, wherein: The radial section of the nut is a polygon, or the nut is a circular nut and the side surface thereof is provided with anti-skid protrusions.

6. The concentric positioning and locking tool for battery case and pole as claimed in claim 1, wherein: The shell positioning sleeve is made of an insulating material, or an insulating layer is attached in the shell accommodating groove.

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