A slag guard for square lithium battery packs

Abstract

This utility model provides a welding slag protection device for square lithium battery packs, belonging to the field of lithium battery production technology. It includes: a protective plate, comprising two plates, each with several positioning slots, which fit into the corresponding lithium battery pack; and a support plate, with two grooves adapted to the protective plate, each groove having a positioning pin on its opposite side, one end of which is installed inside the support plate. This utility model replaces adhesive tape for positioning, effectively protecting the busbars and preventing slag from splashing onto the busbars of the square lithium battery pack, thus preventing damage and reduced welding quality. Simultaneously, the positioning slots ensure the stability of the protective device, preventing it from shaking during welding operations and affecting welding quality. Furthermore, this utility model is simple and convenient to operate, solving the problem of the physical labor required for manual tape positioning protection over long periods.

Description

Technical Field

[0001] This utility model mainly relates to the technical field of lithium battery production, specifically a welding slag protection device for square lithium battery packs. Background Technology

[0002] During laser welding of prismatic lithium-ion battery packs, molten metal spatter frequently occurs. This metal is extremely hot, and if it splashes onto the busbars of the prismatic lithium-ion battery pack, it can cause damage to the busbars. In addition, weld slag falling off can also affect the welding quality, leading to a decrease in the heat dissipation performance of the battery pack and affecting the overall performance of the battery pack. If weld slag falls onto the connection between individual battery cells or modules, it can cause damage to the battery pack or even cause a fire.

[0003] Currently, on production lines, the common method to prevent welding slag from damaging square lithium battery packs is for workers to use masking tape to cover and protect the busbars. However, this method has drawbacks: 1. Shielding gas is required during subsequent laser welding, and this gas may blow away the masking tape, rendering it ineffective; 2. The masking tape requires workers to align it precisely, increasing their workload and significantly reducing the production efficiency of the lithium battery production line.

[0004] Therefore, in order to improve the welding quality and product qualification rate, providing a simple, easy-to-install, accurate, and safe welding slag protection device for square lithium battery packs is a problem that should be addressed in the battery pack production process. Utility Model Content

[0005] This utility model provides a solution that is significantly different from existing technologies, addressing the problem that existing solutions are too simplistic. Specifically, this utility model mainly provides a welding slag protection device for square lithium battery packs to solve the technical problems mentioned in the background.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0007] A slag protection device for square lithium battery packs, comprising:

[0008] The protective plate consists of two pieces, each with several positioning holes and slots, which fit into the corresponding lithium battery pack.

[0009] The support plate has two grooves that are adapted to the protective plate. Each groove has a positioning pin on a side opposite to the other. One end of each positioning pin is installed inside the support plate.

[0010] Preferably, the positioning structure includes five raised positioning slots on the protective plate, and the five raised positioning slots are adapted to the protrusions of the lithium battery pack tooling.

[0011] Preferably, the positioning structure includes two square positioning holes provided on the protective plate, and the two square positioning holes are adapted to the battery cell terminals.

[0012] Preferably, the positioning structure includes an FPC temperature sensor positioning slot provided on the protective plate, the FPC temperature sensor positioning slot being adapted to the FPC temperature sensor.

[0013] Preferably, the positioning structure includes a lithium battery pack segment positioning groove provided on the protective plate, wherein the lithium battery pack segment positioning groove is adapted to the lithium battery pack segment.

[0014] Preferably, the protective plate is made of fiberglass cloth and epoxy resin, and the two ends of the opposite side of the two protective plates have a chamfered structure.

[0015] Preferably, each of the protective plates is fixed inside the groove by two bolts.

[0016] Preferably, the other end of the positioning pin is fitted into the positioning groove of the lithium battery pack tooling.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] This utility model uses a protective plate and a support plate to assemble a protective device, which replaces the tape positioning to effectively protect the busbar, preventing it from splashing onto the busbar of the square lithium battery pack, causing damage to the busbar and reducing the welding quality. At the same time, the protective device fits into the corresponding lithium battery pack through several positioning holes and slots to ensure the stability of the protective device and prevent it from shaking during welding operations, which would affect the welding quality. Furthermore, this utility model is simple and convenient to operate, solving the problem of the physical labor required for manual long-term application of tape for positioning and protection.

[0019] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the protective device structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the protective plate structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the support plate structure of this utility model.

[0023] In the picture:

[0024] 10. Protective plate; 101. Raised positioning groove; 102. Square positioning hole; 103. FPC temperature sensor positioning groove; 104. Battery pack fragment positioning groove;

[0025] 20. Support plate; 201. Groove; 202. Locating pin;

[0026] 30. Bolts. Detailed Implementation

[0027] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intermediate element present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intermediate element present. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] Please refer carefully to the attached diagram. Figure 1 A welding slag protection device for square lithium battery packs includes a protective plate 10 and a support plate 20. Two protective plates 10 are provided, and each protective plate 10 is made of fiberglass cloth and epoxy resin, and is heat-resistant and non-conductive.

[0031] Please refer carefully to the attached diagram. Figures 1-3Each protective plate 10 is provided with several positioning holes and slots, which are used to fit into the corresponding lithium battery pack. The positioning structure includes five raised positioning slots 101 on the protective plate 10, which are adapted to the protrusions of the lithium battery pack fixture. The positioning structure also includes two square positioning holes 102 on the protective plate 10, which are adapted to the battery cell terminals. Furthermore, the positioning structure includes an FPC temperature sensor positioning slot 103 on the protective plate 10, which is adapted to the FPC temperature sensor. Finally, the positioning structure includes a lithium battery pack fragment positioning slot 104 on the protective plate 10, which is adapted to the lithium battery pack fragments. By fitting into the corresponding lithium battery pack through several positioning holes and slots, the protective plate 10 is ensured to be stable and not detached after being installed on the lithium battery fixture.

[0032] The two ends of the two protective plates 10 on opposite sides are chamfered, which can prevent the sharp corners of the tooling from scratching the plastic parts of the busbar.

[0033] Please refer carefully to the attached diagram. Figures 1-3 The support plate 20 is provided with two grooves 201 that are adapted to the protective plate 10. Each protective plate 10 is fixed inside the groove 201 by two bolts 30. The grooves 201 fit the protective plate 10, ensuring that the protective plate 10 has no protrusions after the support plate 20 and the protective plate 10 are connected.

[0034] Each of the two grooves 201 is provided with a positioning pin 202 on opposite sides. One end of the positioning pin 202 is installed inside the support plate 20, and the other end of the positioning pin 202 is engaged with the positioning groove of the lithium battery pack tooling. This ensures that the protective tooling is stable and does not shake.

[0035] Specific usage instructions:

[0036] Before welding, the worker takes the welding protective device, holds both sides of the protective plate 10 with both hands, and inserts the positioning pins 202 on both sides horizontally downward into the positioning slots of the square lithium battery pack tooling. This ensures that the various protruding positioning slots 101, square positioning holes 102, FPC temperature sensor positioning slots 103, and lithium battery pack fragment positioning slots 104 fit with the square lithium battery pack tooling, thereby ensuring the stability of the protective device. Afterward, when the square lithium battery pack is laser welded on the production line, the protective plate 10 can prevent splashes from hitting the busbar of the square lithium battery pack.

[0037] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A slag guard for a square lithium battery pack, characterized by, include: The protective plate (10) is provided in two pieces, and each protective plate (10) is provided with a number of positioning holes and slots. The protective plate (10) fits into the corresponding lithium battery pack through the number of positioning holes and slots. The support plate (20) has two grooves (201) that are adapted to the protective plate (10). The two grooves (201) are provided with positioning pins (202) on opposite sides. One end of the positioning pin (202) is installed inside the support plate (20).

2. A slag guard for square lithium batteries as defined in claim 1, characterized in that: The positioning structure includes five raised positioning grooves (101) provided on the protective plate (10), and the five raised positioning grooves (101) are adapted to the protrusions of the lithium battery pack tooling.

3. A slag guard for square lithium batteries as defined in claim 1, wherein: The positioning structure includes two square positioning holes (102) provided on the protective plate (10), and the two square positioning holes (102) are adapted to the battery cell terminals.

4. The slag guard for square lithium batteries of claim 1, wherein: The positioning structure includes an FPC temperature sensor positioning slot (103) provided on the protective plate (10), which is adapted to the FPC temperature sensor.

5. The slag guard for square lithium batteries of claim 1, wherein: The positioning structure includes a lithium battery pack segment positioning groove (104) provided on the protective plate (10), which is adapted to the lithium battery pack segment.

6. A slag guard for square lithium batteries as defined in claim 1, wherein: The protective plate (10) is made of fiberglass cloth and epoxy resin, and the two ends of the two protective plates (10) on opposite sides are chamfered.

7. A slag guard for square lithium batteries as defined in claim 1, wherein: Each of the protective plates (10) is secured inside the groove (201) by two bolts (30).

8. The slag guard for square lithium batteries of claim 1, wherein: The other end of the positioning pin (202) is fitted with the positioning groove of the lithium battery pack tooling.

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