An electrode assembly and a method of manufacturing the same

Abstract

The utility model discloses an embodiment provides a kind of electric core welding detection device, it is related to battery detection technical field.Electric core welding detection device includes torque wrench, and detects head and protective sleeve, and one end of torque wrench has driving head, detects head and is connected with driving head, and the end of detects head away from driving head is used to stretch into the weld between busbar and electric core;Protective sleeve is set to the end of detects head close to driving head, and is connected with driving head, and the end of protective sleeve away from driving head is used to abut on busbar.The electric core welding detection device can reduce detects error, realizes the quick detection of electric core welding quality, to improve detection efficiency and accuracy, improves the reliability and security of battery assembly.

Description

Technical Field

[0001] This utility model relates to the field of battery testing technology, and more specifically, to a battery cell welding testing device. Background Technology

[0002] In the battery assembly process, after the cell and busbar are welded, welding quality inspection is required to ensure that the weld strength meets the process specifications. Currently, the industry commonly uses manual inspection methods. The specific procedure is as follows: the inspector inserts an inspection rod into the weld gap between the cell and the busbar and applies prying force to perform a peel test. If no weld breakage occurs during the prying process, it is determined that the welding materials have achieved complete fusion, the welding process parameters are set reasonably, and the welding quality meets the acceptance standards.

[0003] However, this manual inspection mode has significant drawbacks: First, the positioning of the inspection rod is difficult, resulting in low inspection efficiency; second, the inspection results are heavily dependent on the operator's professional skills. Due to the lack of standardized control over the prying force and angle of action, it is not only easy to make quality misjudgments, but may also lead to excessive force that damages the welding parts, thereby affecting the reliability of battery assembly. Utility Model Content

[0004] The purpose of this invention is to provide a battery cell welding inspection device that can reduce inspection errors, achieve rapid inspection of battery cell welding quality, improve inspection efficiency and accuracy, and enhance the reliability of battery assembly.

[0005] The embodiments of this utility model are implemented as follows:

[0006] An embodiment of this utility model provides a battery cell welding inspection device, comprising:

[0007] A torque wrench, one end of which has a drive head;

[0008] A probe for inspection, connected to the drive head, wherein one end of the probe for inspection, away from the drive head, is used to extend into the weld seam between the busbar and the battery cell; and

[0009] A protective sleeve is fitted over the end of the probe closer to the drive head and connected to the drive head. The end of the protective sleeve away from the drive head is used to abut against the busbar.

[0010] In an optional embodiment, the inspection head includes a mounting part and a positioning part, the mounting part is connected to the positioning part, the protective sleeve is fitted onto the mounting part, the drive head is connected to the mounting part, and the positioning part is used to extend into the weld between the busbar and the battery cell;

[0011] The thickness of the positioning part is less than the thickness of the mounting part.

[0012] In an optional embodiment, the protective sleeve has a mounting groove on the side near the drive head and a mounting hole on the side away from the drive head, the mounting hole penetrating the bottom wall of the mounting groove;

[0013] The mounting part passes through the mounting hole, and a portion of the mounting part is located within the mounting groove, with at least a portion of the drive head disposed within the mounting groove.

[0014] In an optional embodiment, the cell welding inspection device further includes a first fastener, which is simultaneously inserted through the mounting portion and the drive head, and the two ends of the first fastener are respectively connected to the two side walls opposite to the mounting groove.

[0015] In an optional embodiment, the tilting head further includes a reinforcing part, which is connected to the mounting part and disposed within the mounting groove;

[0016] The cell welding inspection device further includes a second fastener, which passes through the reinforcing part and is connected to the bottom wall of the mounting groove.

[0017] In an optional embodiment, the positioning part is flat in shape.

[0018] In an optional embodiment, the protective sleeve has an arc-shaped protrusion at the end away from the drive head, the arc-shaped protrusion being used to abut against the busbar.

[0019] In an optional embodiment, the end face of the protective sleeve away from the drive head is a frosted surface.

[0020] In an optional embodiment, the material of the prying head is high-speed steel.

[0021] In an optional embodiment, the protective sleeve is made of fiberglass.

[0022] The beneficial effects of this utility model embodiment include:

[0023] The battery cell welding inspection device includes a torque wrench, a pry head, and a protective sleeve. One end of the torque wrench has a drive head, and the pry head is connected to the drive head. The end of the pry head furthest from the drive head is used to insert into the weld between the busbar and the battery cell. The protective sleeve is fitted over the end of the pry head closest to the drive head and is connected to the drive head. The end of the protective sleeve furthest from the drive head is used to abut against the busbar. The torque wrench can adjust the torque value of the drive head, thereby controlling the force applied by the pry head. During the prying process, it ensures that the prying force on the weld is within a set range, achieving precise control of the prying force, avoiding subjective errors from manual operation, and preventing damage to the weld due to excessive force, thus improving the accuracy and reliability of the inspection. Furthermore, by setting the pry head to directly insert into the weld between the busbar and the battery cell, the prying area can be accurately located, improving inspection efficiency. Meanwhile, the protective sleeve protects the test head, preventing it from accidentally touching other parts of the busbar during testing and causing short circuits or sparks, thus improving the reliability and safety of battery assembly. In addition, the protective sleeve, when pressed against the busbar, also enhances stability during the test process. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the battery cell welding inspection device and busbar tilting inspection provided in an embodiment of this utility model;

[0026] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0027] Figure 3 A schematic diagram of the structure of the battery cell welding inspection device provided in this embodiment of the utility model;

[0028] Figure 4 Exploded view of the battery cell welding inspection device provided in the embodiment of this utility model;

[0029] Figure 5 This is a schematic diagram of the structure of the inspection head provided in an embodiment of the present utility model;

[0030] Figure 6 A schematic diagram of the structure of the protective sleeve provided in an embodiment of this utility model.

[0031] Icons: 100-Cell welding inspection device; 10-Torque wrench; 11-Drive head; 20-Inspection head; 21-Mounting part; 22-Positioning part; 23-Reinforcing part; 30-Protective sleeve; 31-Mounting groove; 32-Mounting hole; 33-Arc-shaped protrusion; 34-End face; 40-First fastener; 50-Second fastener; 200-Busbar. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted.

[0037] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] As described in the background section, the method of manually inspecting the welding quality of battery cells has significant drawbacks: First, the positioning of the inspection rod is difficult, resulting in low inspection efficiency; second, the inspection results are highly dependent on the professional skill level of the operator. Due to the lack of standardized control over the prying force and the angle of application, it is not only easy to make misjudgments of quality, but may also lead to excessive force and damage to the welding parts, thereby affecting the reliability of battery assembly.

[0039] Based on this, please refer to Figures 1-6 This utility model provides a cell welding inspection device 100, which can effectively improve the aforementioned technical problems. Specifically, it can reduce inspection errors, achieve rapid inspection of cell welding quality, improve inspection efficiency and accuracy, and enhance the reliability of battery assembly. The cell welding inspection device 100 will be described in detail below.

[0040] Please refer to Figures 1-4 , Figure 1 This is a schematic diagram of the cell welding inspection device 100 and busbar 200 provided in this embodiment. Figure 2 for Figure 1 A magnified view of a portion of point A in the middle. Figure 3 This is a schematic diagram of the structure of the battery cell welding inspection device 100 provided in this embodiment. Figure 4 This is an exploded view of the battery cell welding inspection device 100 provided in this embodiment. (Combined with...) Figures 1-4 The battery cell welding inspection device 100 includes a torque wrench 10, a probe 20, and a protective sleeve 30. One end of the torque wrench 10 has a drive head 11, and the probe 20 is connected to the drive head 11. The end of the probe 20 away from the drive head 11 is used to extend into the weld between the busbar 200 and the battery cell (not shown in the figure). The protective sleeve 30 is fitted on the end of the probe 20 near the drive head 11 and is connected to the drive head 11. The end of the protective sleeve 30 away from the drive head 11 is used to abut against the busbar 200.

[0041] As is easily understood, the torque wrench 10 can adjust the torque value of the drive head 11, thereby controlling the force applied by the inspection head 20. During the inspection process, it ensures that the inspection force on the weld is within the set range, achieving precise control of the prying force, avoiding subjective errors from manual operation, and preventing damage to the welded area due to excessive force, thus improving the accuracy and reliability of the inspection. Furthermore, by setting the inspection head 20 to directly extend into the weld between the busbar 200 and the battery cell, the inspection area can be accurately located, improving inspection efficiency. At the same time, the protective sleeve 30 protects the inspection head 20, preventing it from accidentally touching other parts of the busbar 200 during inspection, which could cause short circuits or sparks, thus improving the reliability and safety of battery assembly. In addition, the protective sleeve 30, when pressed against the busbar 200, also improves the stability during the inspection process.

[0042] For details, please refer to Figure 5 , Figure 5 This is a schematic diagram of the structure of the tilting detector 20 provided in this embodiment, combined with... Figures 2-5 The inspection head 20 includes a mounting part 21 and a positioning part 22. The mounting part 21 is connected to the positioning part 22. A protective sleeve 30 is fitted onto the mounting part 21. The drive head 11 is connected to the mounting part 21. The positioning part 22 is used to extend into the weld between the busbar 200 and the battery cell. The thickness of the positioning part 22 is less than the thickness of the mounting part 21.

[0043] In other words, the mounting part 21 is thicker, which allows for better assembly with the protective sleeve 30 and the drive head 11, improving the connection strength. The positioning part 22, on the other hand, is thinner, making it easier for it to extend into the weld, thus improving inspection efficiency.

[0044] Furthermore, in this embodiment, the positioning part 22 is flat. It is understood that the flat positioning part 22 can better fit the weld between the battery cell and the busbar 200, improving positioning accuracy. In addition, the flat structure can increase the contact area with the busbar 200, improving stability during the inspection process.

[0045] Please refer to Figure 6 , Figure 6 This is a schematic diagram of the structure of the protective sleeve 30 provided in this embodiment, combined with... Figures 2-6 To facilitate the installation of the drive head 11 and the inspection head 20 and improve assembly efficiency, in this embodiment, the protective sleeve 30 has a mounting groove 31 on the side near the drive head 11 and a mounting hole 32 on the side away from the drive head 11, the mounting hole 32 penetrating the bottom wall of the mounting groove 31. The mounting part 21 passes through the mounting hole 32, and a portion of the mounting part 21 is located within the mounting groove 31, at least a portion of the drive head 11 is disposed within the mounting groove 31.

[0046] Furthermore, in order to improve the connection stability between the protective sleeve 30 and the drive head 11 and the inspection head 20, the cell welding inspection device 100 also includes a first fastener 40, which is simultaneously installed in the mounting part 21 and the drive head 11, and the two ends of the first fastener 40 are respectively connected to the two side walls opposite to the mounting groove 31.

[0047] It should be noted that the number of first fasteners 40 can be set to multiple to further improve the connection strength. For example, in this embodiment, the number of first fasteners 40 is two; of course, in other embodiments, the number of first fasteners 40 can also be one, three, or four, etc.

[0048] To further improve the installation stability and connection strength of the inspection head 20, the inspection head 20 also includes a reinforcing part 23, which is connected to the mounting part 21 and disposed within the mounting groove 31. The battery cell welding inspection device 100 also includes a second fastener 50, which passes through the reinforcing part 23 and is connected to the bottom wall of the mounting groove 31.

[0049] Similarly, the number of second fasteners 50 can also be multiple. It should be noted that the first fastener 40 and the second fastener 50 can be other fastening structures such as bolts, screws, or rivets.

[0050] Please combine Figure 2 and Figure 6 The protective sleeve 30 has an arc-shaped protrusion 33 at the end away from the drive head 11, which is used to abut against the busbar 200. By setting the arc-shaped protrusion 33, it can better fit the surface of the busbar 200, reduce the contact area with the busbar 200, and avoid contact with other parts of the busbar 200, thereby reducing damage to the busbar 200 during the inspection process.

[0051] Furthermore, the end face 34 of the protective sleeve 30 away from the drive head 11 is a frosted surface. Specifically, in this embodiment, the end face 34 of the arc-shaped protrusion 33 is a frosted surface. By setting a frosted surface, the friction between the protective sleeve 30 and the manifold 200 can be increased, reducing the possibility of the protective sleeve 30 accidentally slipping off during the inspection process. It also enhances the grip stability of the torque wrench 10, thereby improving the accuracy of the inspection.

[0052] It should be noted that in this embodiment, the protective sleeve 30 is specifically made of glass fiber, which has the characteristics of good insulation and heat resistance, high strength, and strong corrosion resistance. Of course, in other embodiments, the protective sleeve 30 can also be made of other materials such as carbon fiber, basalt fiber, or aramid fiber.

[0053] Additionally, it should be noted that in this embodiment, the probe 20 is specifically made of high-speed steel, which has the characteristics of high hardness and strong wear resistance. Compared with the inspection rods (made of polyethylene) used in the prior art, it has better structural strength, longer service life, reduces the time spent frequently changing inspection tools, lowers costs, and improves inspection efficiency. Of course, in other embodiments, the probe 20 can also be made of other materials such as cemented carbide or tungsten carbide steel.

[0054] Based on the above description, the working principle of the battery cell welding inspection device 100 provided in this embodiment is as follows:

[0055] First, select a suitable pry test head 20 according to the shape of the weld gap between the busbar 200 and the battery cell, and then fix the pry test head 20 onto the drive head 11 of the torque wrench 10. Next, insert the flat positioning part 22 of the pry test head 20 into the weld gap between the busbar 200 and the battery cell through the hole on the busbar 200 plate, so that the arc-shaped protrusion 33 of the protective sleeve 30 abuts against the surface of the busbar 200. Then, adjust the torque value of the torque wrench 10 to the set range, and then slowly press down the torque wrench 10 so that the pry test head 20 pries the gap at a uniform speed. If the gap does not break under the set torque value, the weld is deemed qualified; if the weld breaks, the weld is deemed unqualified.

[0056] In summary, the embodiments of this utility model provide a battery cell welding inspection device 100. The battery cell welding inspection device 100 includes a torque wrench 10, a pry head 20, and a protective sleeve 30. One end of the torque wrench 10 has a drive head 11, and the pry head 20 is connected to the drive head 11. The end of the pry head 20 away from the drive head 11 is used to extend into the weld between the busbar 200 and the battery cell. The protective sleeve 30 is fitted onto the end of the pry head 20 near the drive head 11 and is connected to the drive head 11. The end of the protective sleeve 30 away from the drive head 11 is used to abut against the busbar 200. The torque wrench 10 can adjust the torque value of the drive head 11, thereby controlling the force applied by the pry head 20. During the prying process, it can ensure that the prying force on the weld is within a set range, achieving precise control of the prying force, avoiding subjective errors from manual operation, and preventing excessive force from damaging the welded area, thereby improving the accuracy and reliability of the inspection. Furthermore, by setting the inspection head 20 to directly extend into the weld between the busbar 200 and the battery cell, precise positioning of the inspection area can be achieved, improving inspection efficiency. Simultaneously, the protective sleeve 30 protects the inspection head 20, preventing it from accidentally contacting other parts of the busbar 200 during inspection, thus avoiding short circuits and sparks, improving the reliability and safety of battery assembly. In addition, the protective sleeve 30, when pressed against the busbar 200, also enhances stability during the inspection process.

[0057] The above description is merely a specific embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery cell welding inspection device, characterized in that, include: A torque wrench (10), one end of which has a drive head (11). A probe (20) is connected to the drive head (11), and one end of the probe (20) away from the drive head (11) is used to extend into the weld between the busbar (200) and the battery cell; and A protective sleeve (30) is fitted onto the end of the pry head (20) near the drive head (11) and connected to the drive head (11). The end of the protective sleeve (30) away from the drive head (11) is used to abut against the busbar (200).

2. The battery cell welding inspection device according to claim 1, characterized in that, The inspection head (20) includes an installation part (21) and a positioning part (22). The installation part (21) is connected to the positioning part (22). The protective sleeve (30) is fitted onto the installation part (21). The drive head (11) is connected to the installation part (21). The positioning part (22) is used to extend into the weld between the busbar (200) and the battery cell. The thickness of the positioning part (22) is less than the thickness of the mounting part (21).

3. The battery cell welding inspection device according to claim 2, characterized in that, The protective sleeve (30) has an installation groove (31) on the side close to the drive head (11), and an installation hole (32) on the side away from the drive head (11). The installation hole (32) penetrates the bottom wall of the installation groove (31). The mounting part (21) passes through the mounting hole (32), and a portion of the mounting part (21) is located in the mounting groove (31), and at least a portion of the drive head (11) is disposed in the mounting groove (31).

4. The battery cell welding inspection device according to claim 3, characterized in that, The cell welding inspection device (100) further includes a first fastener (40), which is simultaneously installed in the mounting part (21) and the drive head (11), and the two ends of the first fastener (40) are respectively connected to the two side walls opposite to the mounting groove (31).

5. The cell welding inspection device according to claim 3, characterized in that, The inspection head (20) also includes a reinforcing part (23), which is connected to the mounting part (21) and is disposed in the mounting groove (31); The cell welding inspection device (100) further includes a second fastener (50), which passes through the reinforcing part (23) and is connected to the bottom wall of the mounting groove (31).

6. The battery cell welding inspection device according to claim 2, characterized in that, The positioning part (22) is flat in shape.

7. The battery cell welding inspection device according to any one of claims 1-6, characterized in that, The protective sleeve (30) has an arc-shaped protrusion (33) at one end away from the drive head (11), and the arc-shaped protrusion (33) is used to abut against the busbar (200).

8. The battery cell welding inspection device according to any one of claims 1-6, characterized in that, The end face (34) of the protective sleeve (30) away from the drive head (11) is frosted.

9. The battery cell welding inspection device according to any one of claims 1-6, characterized in that, The material of the inspection head (20) is high-speed steel.

10. The battery cell welding inspection device according to any one of claims 1-6, characterized in that, The protective sleeve (30) is made of fiberglass.

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