Battery pack welding protection plate positioning device

Abstract

The utility model discloses a device for positioning a battery pack welding protection plate, and relates to the field of lithium battery production. A battery pack welding protection plate positioning device comprises a positioning mold; a positioning auxiliary tool for positioning the nickel strap is mounted on the positioning mold; according to the utility model, the positioning mold is matched with the positioning auxiliary tool for use, so that the spot welding of the protective plate of the battery module is more accurate, the conditions of insufficient welding and spot welding position deviation are avoided, the battery pack can be optimized, and the electric welding efficiency and accuracy of the protective plate are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium battery production, and in particular relates to a device for positioning a welding protection plate of a battery pack. Background Art

[0002] At present, in the field of lithium battery application, when welding the battery cell and the protection plate of a small power battery pack, most of the protective plate is welded by manual positioning. Due to the instability of manual operation, the battery cell and the battery pack may be inconsistent in position when the battery pack is welded. As a result, when the nickel strip of the battery cell is spot-welded to the protection plate, the nickel strip cannot be accurately aligned with the spot welding opening of the nickel strip on the protection plate, which may cause the nickel strip to deform, resulting in a large loss of the nickel strip, thereby invisibly increasing the production cost of the battery pack. In view of this problem, the present utility model is specially proposed. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a device for positioning a battery pack welding protection plate that can overcome the above problems or at least partially solve the above problems.

[0004] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is: a device for positioning a battery pack welding protection plate, comprising: a positioning mold; a positioning auxiliary tool for positioning the nickel strip is installed on the positioning mold.

[0005] Furthermore, the positioning mold includes a positioning plate, and the positioning plate is provided with positioning grooves for positioning the battery cell and the protection plate.

[0006] Furthermore, the positioning auxiliary tool includes a support rod and a positioning rod, the support rod is symmetrically fixedly connected to the positioning plate at both sides of the positioning groove, and the positioning rod is fixedly connected to the upper end of the support rod.

[0007] In order to ensure the accuracy of positioning the nickel strip, further, the distance between the two positioning rods is the same as the width of the nickel strip.

[0008] In order to facilitate the removal of the positioning mold, further, the positioning plate is provided with a through groove that interpenetrates with the positioning groove, and the through groove is larger than the size of the device connected to the protection plate.

[0009] In order to save costs, further, the positioning plate is a plastic plate.

[0010] After adopting the above technical scheme, the utility model has the following beneficial effects compared with the prior art: the utility model can make the spot welding of the battery module protection plate more precise through the coordinated use of the positioning mold and the positioning auxiliary tool, avoid the occurrence of cold welding and spot welding position deviation, optimize the battery pack, and improve the welding efficiency and accuracy of the protection plate.

[0011] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In the attached picture:

[0013] Figure 1 A schematic diagram of the structure of a device for positioning a welding protection plate of a battery pack proposed by the utility model;

[0014] Figure 2 A schematic top view of a device for positioning a welding protection plate of a battery pack proposed by the utility model;

[0015] Figure 3 This is a structural schematic diagram of a positioning mold in a device for positioning a battery pack welding protection plate proposed by the utility model;

[0016] Figure 4 The present invention is a schematic structural diagram of a protection plate in a device for positioning a battery pack welding protection plate.

[0017] In the figure: 1. positioning plate; 101. positioning groove; 102. through groove; 103. support rod; 104. positioning rod; 2. battery cell; 3. protection plate; 301. device; 302. nickel strip spot welding port; 4. nickel strip. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0019] Embodiment 1:

[0020] Reference Figure 1-Figure 4 , a device for positioning a battery pack welding protection plate, comprising: a positioning mold; a positioning auxiliary tool for positioning a nickel strip 4 is installed on the positioning mold.

[0021] The positioning mold comprises a positioning plate 1 , on which a positioning groove 101 for positioning the battery cell 2 and the protection plate 3 is formed.

[0022] The positioning auxiliary tool comprises a support rod 103 and a positioning rod 104 . The support rod 103 is symmetrically fixedly connected to the positioning plate 1 on both sides of the positioning groove 101 , and the positioning rod 104 is fixedly connected to the upper end of the support rod 103 .

[0023] A through groove 102 is provided on the positioning plate 1 and is interconnected with the positioning groove 101. The through groove 102 is larger than the size of the device 301 connected to the protection plate 3. When the welding of the nickel strip is completed, the positioning mold can be better separated from the battery pack to avoid damage to the device 301 on the protection plate 3 caused by the positioning mold.

[0024] When it is necessary to weld the battery cell and the protection plate, firstly, multiple battery cells 2 are bonded together to form a battery pack, and then highland barley paper is pasted on the surface of the battery cell 2 to isolate it from the protection plate 3. Then, the battery pack can be embedded in the positioning groove 101 on the positioning plate 1 to locate the position of the battery pack. Then, the protection plate 3 is placed in the side of the positioning groove 101 close to the through groove 102 to determine the relative position of the battery cell 2 and the protection plate 3 so that the positions of the battery cell 2 and the protection plate 3 are in the same plane. Then, the nickel strip 4 can be placed on the battery cell 2 and the nickel strip 4 is located between the two positioning rods 104 to locate the position of the nickel strip 4. Then, one end of the nickel strip 4 is inserted into the nickel strip spot welding opening 30 opened on the protection plate 3. 2, and then the spot welding machine can be used to perform electric welding operations, spot welding the nickel strip 4 to the position of the nickel strip spot welding port 302 on the battery cell 2 and the protection plate 3, and then after welding one end of the battery cell 2 and the protection plate 3, the battery cell 2 and the protection plate 3 are flipped at this time, and the other end of the battery cell 2 and the protection plate 3 can be welded. After the spot welding is completed, the welded battery pack can be taken out of the positioning mold. Through the setting of the device, it can be ensured that the battery cell 2, the protection plate 3, and the nickel strip 4 are in a relatively parallel position, avoiding the occurrence of cold welding and position offset of the nickel strip 4 in the spot welding, thereby achieving the purpose of flat spot welding of the protection plate 3, reducing the position offset and cold welding problems of spot welding, and improving the work efficiency and process completion.

[0025] Embodiment 2:

[0026] Reference Figure 1-Figure 4 , a device for positioning a battery pack welding protection plate, is basically the same as Example 1, and further: the spacing between the two positioning rods 104 is the same as the width of the nickel strip 4. When the nickel strip 4 is welded, the nickel strip 4 can be positioned more accurately, thereby improving the accuracy of welding the nickel strip 4.

[0027] The positioning plate 1 is a plastic plate. By making the positioning plate 1 out of plastic material, not only can the device be made lighter and easier to use, but the manufacturing cost of the device can also be reduced.

[0028] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention.

Claims

1. A device for positioning a battery pack welding protection plate, characterized in that: include: Positioning mold; The positioning mold is provided with a positioning auxiliary tool for positioning the nickel strip (4), the positioning mold comprising a positioning plate (1), the positioning plate (1) being provided with a positioning groove (101) for positioning the battery cell (2) and the protection plate (3), the positioning auxiliary tool comprising a support rod (103) and a positioning rod (104), the support rod (103) being symmetrically fixedly connected to the positioning plate (1) at both sides of the positioning groove (101), and the positioning rod (104) being fixedly connected to the upper end of the support rod (103).

2. The device for positioning a battery pack welding protection plate according to claim 1, characterized in that: The distance between the two positioning rods (104) is the same as the width of the nickel strip (4).

3. The device for positioning a battery pack welding protection plate according to claim 1, characterized in that: The positioning plate (1) is provided with a through groove (102) which interpenetrates with the positioning groove (101); the through groove (102) is larger than the size of the device (301) connected to the protection plate (3).

4. The device for positioning a battery pack welding protection plate according to claim 1, characterized in that: The positioning plate (1) is a plastic plate.

Images