Battery stack double-triaxial screw locking mechanism

Abstract

The utility model discloses a double-three-shaft screw locking mechanism for a battery stack, which belongs to the technical field of battery production and comprises a battery placing table, an auxiliary pressing assembly and an operating frame are mounted on the battery placing table, and the auxiliary pressing assembly is positioned between the operating frame and the battery placing table. Two sets of screw locking assemblies are installed on the operating frame, each screw locking assembly comprises two three-axis moving tables installed on the operating frame in a sliding mode, torque wrenches are installed on the three-axis moving tables, and a rectangular opening located above the auxiliary pressing assembly is formed in the operating frame; the torque wrench can extend out of the rectangular opening to be in contact with the cell stack, the two three-axis moving tables are symmetrically installed along the center of the rectangular opening, and the device is high in production efficiency, low in manufacturing cost and small in occupied space.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery production technical field, concretely relates to a battery stack double three -axis lock screw mechanism. BACKGROUND

[0002] The existing battery stack usually adopts the mode of first pressurizing and then fastening to complete the assembly. In order to ensure the sealing property of the battery stack, the locking positions of a group of battery stacks are usually not less than 20, and the locking positions are usually surrounded to form a rectangular locking edge around the edge of the battery stack, and each locking position is associated with each other.

[0003] In order to ensure the sealing property of the battery stack, the end plate, the buffer plate, the conductive plate and the multiple single batteries are usually pressed tightly, and then locked and fixed through the bolt, and the electric pile is taken out after locking is completed, and the sealing performance test is carried out. The prior art has the following shortcomings:

[0004] 1. In the production process, positioning, pressing, locking bolt and other steps are needed, the process is relatively complicated, and the production efficiency is low.

[0005] 2. In order to provide sufficient pressure for the pressing of the battery stack, the press usually has large volume and mass, and the manufacturing cost is also high.

[0006] 3. The mode of first pressing and then locking the bolt has high requirements for the accuracy of the early positioning, and once the bolt is not accurately positioned, the pressing force needs to be released and repositioned, and the repeated pressing, positioning, pressure relief and adjustment may damage the battery, and the production efficiency is low.

[0007] In view of the problems existing in the prior art, the utility model designs and manufactures a battery stack double three -axis lock screw mechanism to overcome the above defects. UTILITY MODEL CONTENTS

[0008] For the problems existing in the prior art, the utility model provides a battery stack double three -axis lock screw mechanism, which has high production efficiency, low manufacturing cost and small occupied space.

[0009] In order to achieve the above purpose, the utility model adopts the following technical scheme: a battery stack double three -axis lock screw mechanism, comprising a battery placing table, the battery placing table is installed with an auxiliary pressing assembly and an operating frame, the auxiliary pressing assembly is located between the operating frame and the battery placing table, the operating frame is installed with two groups of lock screw assemblies;

[0010] The lock screw assembly comprises two three -axis motion tables slidably installed on the operating frame, the three -axis motion table is installed with a torque wrench, the operating frame is provided with a rectangular opening located above the auxiliary pressing assembly, and the torque wrench can be stretched out from the rectangular opening and contact the battery stack.

[0011] Two three-axis motion platforms are symmetrically installed along the center of the rectangular opening, two torque wrenches can simultaneously lock screws on two locking positions on the diagonal lines of the rectangular hem, two three-axis motion platforms can drive two torque wrenches to clockwise lock screws from the middle point of the battery stack length, the travel route of the torque wrench is a U-shaped path, and two U-shaped paths jointly form a closed path with the same shape as the rectangular hem.

[0012] Preferably, the auxiliary pressing assembly comprises two cross bars and two lifting frames, the lower end of the lifting frame is installed on the battery placing table, the upper end of the lifting frame is connected with the cross bar, and the end of the two cross bars close to each other is installed on the same lifting frame.

[0013] Preferably, the two lifting frames and the two cross bars are symmetrically arranged along the symmetric plane of the battery stack, and the cross bar does not contact the locking position when the cross bar abuts against the battery stack.

[0014] Preferably, the battery placing table comprises a bottom plate, a lifting plate and two supporting vertical plates installed on the lifting plate, the lifting plate, the auxiliary pressing assembly and the operation frame are installed on the bottom plate, and the lifting plate is located below the auxiliary pressing assembly.

[0015] The side close to each other of the two supporting vertical plates is provided with a plurality of placing blocks, and the distance between the side close to each other of the two supporting vertical plates is equal to the length of the end plate, so that the end plate can be placed on the placing blocks.

[0016] Preferably, the lifting plate is provided with a side baffle located between the two supporting vertical plates, and the long side of the end plate can abut against the side baffle.

[0017] Preferably, the lifting plate is provided with a gas cylinder installed on the lower end surface of the lifting plate, one end of the gas cylinder is installed on the lifting plate, and the other end of the gas cylinder is installed on the bottom plate.

[0018] Preferably, the torque wrench is provided with a torque sensor.

[0019] Preferably, the torque wrench is detachably installed on the three-axis motion platform.

[0020] Preferably, the area of the rectangular opening is greater than the area of the upper end surface of the battery stack.

[0021] Preferably, the operation frame is provided with a height detection device for detecting the height of the battery stack.

[0022] The beneficial effects of the utility model are as follows:

[0023] 1. The utility model discloses a two three -axis motion platform is installed on the operation frame to drive two moment spanners to lock the screw on the diagonal line position simultaneously, make every time lock the battery stack and be forced evenly, can guarantee after locking, the whole surface locking pressure is consistent and the flatness of locking surface under the condition that the press is not needed, and also need not high -precision positioning, because locking position is mutually related in the process of locking the screw and will automatically correct the deviation, improve the production efficiency, reduce the manufacturing cost.

[0024] 2. The utility model discloses set up the auxiliary compression assembly, when locking the screw can make the product stress surface more evenly, compared with the press structure is more light and simple, and installs between the operation frame and the battery placing platform and does not occupy the space additionally, reduce the volume and weight of the device, reduced manufacturing cost.

[0025] 3. The utility model discloses set up the moment sensor on the moment spanner, set up the height detection device on the operation frame can detect the stress condition of battery stack in real time, the whole record of locking parameter, can constantly optimize locking logic, improve the flatness of product after locking and the stress uniformity. DRAWINGS

[0026] Fig. 1 It is an isometric side view of the utility model discloses a kind of battery stack double three-axis screw locking mechanism;

[0027] Fig. 2 It is a plan view of the utility model discloses a kind of battery stack double three-axis screw locking mechanism;

[0028] Fig. 3 It is a side view of the utility model discloses a kind of battery stack double three-axis screw locking mechanism.

[0029] In the drawing: 1-three-axis motion platform, 2-moment spanner, 3-cross bar, 4-operation frame, 5-placing block, 6-bottom plate, 7-lifting plate, 8-supporting vertical plate, 9-lifting frame, 10-end plate, 11-rectangular opening, 12-cylinder, 13-side baffle. DETAILED DESCRIPTION

[0030] In order to facilitate the person skilled in the art to understand, the utility model is further explained below in conjunction with the drawings.

[0031] As Figs. 1-3 Shown in a kind of battery stack double three-axis screw locking mechanism, including battery placing platform, the battery stack to be processed is placed on battery placing platform. Auxiliary compression assembly and operation frame 4 are installed on battery placing platform, auxiliary compression assembly is located between operation frame 4 and battery placing platform, and two groups of screw locking assemblies are installed on operation frame 4.

[0032] The utility model discloses a battery placing platform, including bottom plate 6, lifting plate 7 and two support vertical boards 8 installed on lifting plate 7, lifting plate 7, auxiliary compression assembly and operating frame 4 are all installed on bottom plate 6, lifting plate 7 is below auxiliary compression assembly, lifting plate 7 lower end surface is installed with cylinder 12, cylinder 12 one end is installed on lifting plate 7, cylinder 12 other end is installed on bottom plate 6,

[0033] Specifically, lifting plate 7 can drive support vertical board 8 to move up and down, since the battery stack to be assembled is placed on support vertical board 8, lifting plate 7 moving can drive the battery stack to move up and down, greatly adjusting the height of the battery stack, facilitating screw installation.

[0034] The utility model discloses two support vertical boards 8 are installed with a plurality of placing blocks 5 on the side of mutual approach, the distance of the side of mutual approach of two support vertical boards 8 is equal with the length of end plate 10, and end plate 10 can be placed on placing block 5. Lifting plate 7 is installed with the side baffle 13 between two support vertical boards 8, and the long side of end plate 10 can be placed on the side baffle 13, which plays a role in positioning the battery stack.

[0035] The utility model discloses auxiliary compression assembly includes two cross bars 3 and two groups of lifting frame 9, and lifting frame 9 lower end is installed on battery placing platform, and the upper end of lifting frame 9 is connected with cross bar 3, and the end of two cross bars 3 is installed on the same lifting frame 9, and two lifting frames 9 will simultaneously lift, and control two cross bars 3 to compress or loosen the battery stack.

[0036] Specifically, two lifting frames 9 and two cross bars 3 are mutually symmetrical along the symmetry plane of the battery stack, and when the cross bar 3 is placed on the battery stack, the cross bar 3 does not contact the locking position. The auxiliary compression assembly compresses the battery stack during the screw locking process, avoiding displacement of the battery stack. During screw locking, the force receiving surface of the product can be more uniform, the structure is more simple and light compared with the press, and the auxiliary compression assembly is installed between the operating frame 4 and the battery placing platform, without occupying additional space, reducing the volume and weight of the device, and reducing the manufacturing cost.

[0037] The utility model discloses screw locking assembly includes two sliding installation in operating frame 4 on three -axis motion platform 1, and three -axis motion platform 1 is installed with the torque wrench 2 of the screw installation that can lock the position of battery stack. Torque wrench 2 detachable installation is in three -axis motion platform 1, and convenient replacement and maintenance.

[0038] Specifically, the operating frame 4 is provided with a rectangular opening 11 above the auxiliary compression assembly, and the area of the rectangular opening 11 is greater than the area of the upper end surface of the battery stack. The rectangular opening 11 can limit the displacement of the torque wrench 2, and the torque wrench 2 can be extended from the rectangular opening 11 to contact the battery stack;

[0039] Specific, two three-axis motion platform 1 along the center of the rectangular opening 11 symmetry installation, two torque wrench 2 can simultaneously on the diagonal line of the rectangular edge locking two locking position screw, two three-axis motion platform 1 can drive two torque wrench 2 from the battery stack length middle point position clockwise locking screw, torque wrench 2 route for U-shaped path, two U-shaped path together constitute the same shape as the rectangular edge closed path.

[0040] The utility model two torque wrench 2 lock the screw on the diagonal line position simultaneously, make every time locking battery stack be under the stress uniformity, can guarantee locking after in the case where not needing press machine, whole face locking pressure is consistent and the flatness of locking surface. Because locking position is mutually related in the process of locking screw and will automatically correct deviation, therefore also do not need high accuracy positioning, improve production efficiency, reduce manufacturing cost.

[0041] The utility model torque wrench 2 is installed with torque sensor, and height detection device that detects battery stack height is installed on operating frame 4, and setting height detection device on operating frame 4 can detect the stress condition of battery stack in real time, and the whole course record of locking parameter can constantly optimize locking logic, improve the flatness of product after locking and stress uniformity.

[0042] It should be understood that the use of these embodiments is only for illustrating the utility model and is not intended to limit the scope of protection of the utility model. In addition, it should also be understood that after reading the technical content of the utility model, those skilled in the art can make various changes, modifications and / or variations to the utility model, and all these equivalent forms also fall within the protection scope defined by the appended claims of the present application.

Claims

1. A battery stack double-triaxial lock screw mechanism, characterized by, The battery placement table is provided with an auxiliary compression assembly and an operating frame (4), the auxiliary compression assembly is located between the operating frame (4) and the battery placement table, and two sets of lock screw assemblies are arranged on the operating frame (4); The lock screw assembly comprises two three-axis motion tables (1) slidably arranged on the operating frame (4), and a torque wrench (2) is arranged on the three-axis motion table (1); a rectangular opening (11) is arranged on the operating frame (4) and located above the auxiliary compression assembly, and the torque wrench (2) can be extended out of the rectangular opening (11) to contact the battery stack. The two three-axis motion tables (1) are symmetrically arranged along the center of the rectangular opening (11), the two torque wrenches (2) can simultaneously lock screws at two locking positions on the diagonal lines of the rectangular lock edge, the two three-axis motion tables (1) can drive the two torque wrenches (2) to clockwise lock screws from the middle point of the length of the battery stack, and the travel route of the torque wrench (2) is a U-shaped path, and the two U-shaped paths jointly form a closed path with the same shape as the rectangular lock edge.

2. A dual triaxial lock screw mechanism for a battery stack as defined in claim 1, wherein, The auxiliary compression assembly comprises two cross bars (3) and two sets of lifting frames (9), the lower end of the lifting frame (9) is arranged on the battery placement table, the upper end of the lifting frame (9) is connected with the cross bar (3), and the ends of the two cross bars (3) close to each other are arranged on the same lifting frame (9).

3. A dual-triaxial lock screw mechanism for a battery stack according to claim 2, wherein, The two lifting frames (9) and the two cross bars (3) are symmetrically arranged along the symmetry plane of the battery stack, and the cross bar (3) is not in contact with the locking position when the cross bar (3) abuts against the battery stack.

4. The dual tri-axial lock screw mechanism for a battery stack of claim 1, wherein, The battery placement table comprises a bottom plate (6), a lifting plate (7) and two support vertical plates (8) arranged on the lifting plate (7), the lifting plate (7), the auxiliary compression assembly and the operating frame (4) are arranged on the bottom plate (6), and the lifting plate (7) is located below the auxiliary compression assembly; The distance between the two support vertical plates (8) close to each other is equal to the length of the end plate (10), and the end plate (10) can be placed on the placing block (5).

5. A dual triaxial lock screw mechanism for a battery stack as defined in claim 4, wherein, A side baffle (13) is arranged on the lifting plate (7) between the two support vertical plates (8), and the long side of the end plate (10) can abut against the side baffle (13).

6. A dual-triaxial locking screw mechanism for a battery stack according to claim 4, wherein, A gas cylinder (12) is arranged on the lower end surface of the lifting plate (7), one end of the gas cylinder (12) is arranged on the lifting plate (7), and the other end of the gas cylinder (12) is arranged on the bottom plate (6).

7. The dual triaxial lock screw mechanism for a battery stack of claim 1, wherein, A height detection device for detecting the height of the battery stack is arranged on the operating frame (4).

8. The dual triaxial lock screw mechanism for a battery stack of claim 1, wherein, A torque sensor is arranged on the torque wrench (2).

9. The dual triaxial lock screw mechanism for a battery stack of claim 1, wherein, The torque wrench (2) is detachably arranged on the three-axis motion table (1).

10. The dual triaxial lock screw mechanism for a battery stack of claim 1, wherein, The area of the rectangular opening (11) is greater than the area of the upper end surface of the battery stack.

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