A down-pressing tool for cap plate post welding

Abstract

The utility model discloses a kind of for pressing tool of cover plate pole welding, belong to auxiliary tool field. Including base and pressing plate. The top surface of the base is fixedly provided with several limit parts and supporting members, and the containing space for placing battery cover plate is formed by the enclosure of multiple limit parts;Several avoiding notches are opened in the pressing plate. When the device is used, the battery cover plate to be processed is placed on the supporting member of base, and the supporting effect is provided by supporting member, to avoid the deformation of battery cover plate under pressure. The battery cover plate is located in the containing space formed by the enclosure of several limit parts, and the positioning and limiting effect is achieved by limit part, to ensure that battery cover plate is in stable state. Then, the pressing plate is overlaid on the base, so that it can play a restraining role on battery cover plate in the subsequent welding process, and slow down the deformation of battery cover plate.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary tooling, and in particular to a pressing tooling for welding cover plate poles. Background Technology

[0002] With the popularization of electric vehicles, the power battery, as a core component of new energy vehicles, directly affects the battery's performance and safety through its production quality. Among new energy batteries, lithium-ion batteries have become the absolute mainstream due to their advantages such as high energy density, long cycle life, and no memory effect. Their core structure includes a positive electrode, a negative electrode, a separator, an electrolyte, and the crucial battery casing system. The battery top cover (or cover plate) is a key component of this casing system. It is far more than a simple sealing cover; it is a sophisticated safety component that integrates multiple functions.

[0003] Battery top covers are typically made of a composite of various materials (such as aluminum alloy, copper, and stainless steel). Their main functions include: first, sealing – forming an airtight sealed space through laser welding with the casing to prevent electrolyte leakage and the entry of external contaminants, ensuring a stable internal electrochemical environment; second, electrical connection – integrating positive and negative terminals on the top cover to guide the battery's internal current to the external circuitry, requiring excellent insulation between the terminals and the cover to prevent short circuits; third, safety protection – the core value of the top cover, integrating multiple safety devices such as an explosion-proof valve (which ruptures first to release pressure when the battery's internal pressure abnormally increases, preventing explosion), a flip-top plate (disconnecting the current path under high voltage), and an injection hole (for permanent sealing after electrolyte injection); and fourth, process technology – its design directly affects the production efficiency of electrolyte injection, vacuuming, and formation. Therefore, the battery top cover is the first line of defense for ensuring the battery's safe, reliable, and long-life operation, and its technical level and quality directly determine the overall performance and safety of new energy batteries.

[0004] The terminals are a crucial part of the battery cover. To ensure a secure connection and electrical performance between the terminals and the cover, welding is typically required to fix the terminals to the cover. However, during welding, thermal stress can cause deformation and bending defects in the battery cover, especially near the terminals, affecting subsequent assembly and the battery's sealing performance. Utility Model Content

[0005] This utility model provides a pressing tool for welding cover plate poles, which can solve the problem that the battery cover plate is prone to deformation and bending due to the welding thermal stress in the auxiliary tooling of the prior art.

[0006] The objective of this utility model can be achieved through the following technical solutions: A pressing tool for welding cover plate poles includes: The base has several limiting members and supporting members fixedly arranged on its top surface, and the multiple limiting members enclose a receiving space for placing the battery cover. A pressure plate, wherein several clearance notches are provided on the pressure plate; When the pressure plate is pressed onto the base, the position of the clearance notch matches the position of the receiving space.

[0007] In one embodiment of this utility model: the limiting member includes several sets of end blocks and several sets of side blocks. Each set of end blocks includes two oppositely arranged end blocks, and the distance between the two end blocks in the same set is consistent with the length dimension of the battery cover. Each set of side blocks includes two oppositely arranged side blocks, and the distance between the two side blocks in the same set is consistent with the width dimension of the battery cover.

[0008] In one embodiment of this utility model: the pressure plate protrudes outward on one side near the base to form a contact portion, and the position of the contact portion matches the position of the accommodating space.

[0009] In one embodiment of this utility model: the clearance gap includes a first gap and a second gap.

[0010] In one embodiment of this utility model: a guide portion is provided at the end of the first notch away from the base.

[0011] In one embodiment of this utility model: a positioning part is fixedly provided on the inner side of the end block.

[0012] In one embodiment of this utility model: several sets of end blocks are arranged sequentially along the length direction of the base.

[0013] In one embodiment of this utility model: each set of end blocks is provided with two sets of side blocks, and the two end blocks and the four side blocks enclose a receiving space.

[0014] In one embodiment of this utility model: the side blocks of two adjacent accommodating spaces share the same one.

[0015] In one embodiment of this utility model: the outermost side block is larger than the other side blocks.

[0016] The pressing tool for welding cover plate poles according to this utility model has at least the following technical effects: In use, the battery cover to be processed is placed on the support of the base. The support provides support to prevent the battery cover from deforming downwards under pressure. The battery cover is located within a receiving space formed by several limiting members, which position and limit the battery cover, ensuring its stability. Then, a pressure plate is placed on the base, which restrains the battery cover during subsequent welding, reducing deformation. When the pressure plate is placed on the base, the position of the clearance notch matches the position of the receiving space. That is, the position of the clearance notch matches the position of the battery cover to avoid related structures on the battery cover (such as explosion-proof valves) and to provide operating space for welding the terminals. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood in conjunction with the following description of the embodiments with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. Wherein: Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model; Figure 2 This is a top view of the pressure plate in an embodiment of the present invention. Figure 3 This is a side view of the pressure plate in an embodiment of the present invention. Figure 4 This is a schematic diagram of the pressure plate from below in an embodiment of this utility model; Figure 5 This is a top view of the base of an embodiment of the present invention. Figure 6 This is an embodiment of the present utility model. Figure 5 A magnified structural diagram of part A in the middle; Figure 7 This is a side view of the base of an embodiment of the present utility model. Figure 8 This is an embodiment of the present utility model. Figure 7 A magnified structural diagram of section B in the middle; Figure 9 This is a schematic diagram of the cooling channel of this utility model.

[0018] Explanation of reference numerals in the attached figures: 1. Battery cover; 2. Base; 3. Pressure plate; 4. Limiting component; 41. End block; 42. Side block; 43. Positioning part; 5. Support component; 6. Clearance notch; 7. Contact part; 8. Cooling channel. Detailed Implementation

[0019] 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. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] To ensure the robustness and electrical performance of the connection between the terminal post and the battery cover 1 (i.e., the battery top cover), the terminal post needs to be welded to the cover. However, existing welding methods typically involve direct welding, and due to the high temperature during the welding process, the thermal stress can cause significant deformation of the cover, especially near the terminal post, which is prone to bending, affecting subsequent assembly and the battery's sealing performance. To address these issues, this application provides a pressing auxiliary tooling that can press down and fix the cover during welding, applying constraint to prevent deformation. The tooling is released after the cover welding is completed and the battery has cooled down, effectively curbing cover deformation.

[0021] like Figure 1-9 As shown in the figure, the present invention provides a pressing fixture for welding cover plate poles, comprising a base 2 and a pressure plate 3. A plurality of limiting members 4 and supporting members 5 are fixedly disposed on the top surface of the base 2, and the plurality of limiting members 4 enclose a receiving space for placing the battery cover plate 1; the pressure plate 3 has a plurality of clearance notches 6.

[0022] In use, the battery cover 1 to be processed is placed on the support member 5 of the base 2. The support member 5 provides support to prevent the battery cover 1 from deforming downwards under pressure. The battery cover 1 is located within the receiving space formed by several limiting members 4, which provide positioning and limitation to ensure the battery cover 1 remains stable. Then, the pressure plate 3 is pressed onto the base 2, thereby restraining the battery cover 1 during subsequent welding and reducing deformation. When the pressure plate 3 is pressed onto the base 2, the position of the clearance notch 6 matches the position of the receiving space. That is, the position of the clearance notch 6 matches the position of the battery cover 1 to avoid related structures on the battery cover 1 (such as explosion-proof valves) and to provide operating space for welding the electrode posts.

[0023] The pressure plate 3 presses against the base 2 (battery cover 1) and applies constraint to the battery cover 1. This constraint can be achieved by the weight of the pressure plate 3 itself, or by mounting the pressure plate 3 on a drive structure (such as a hydraulic drive structure). The drive structure then moves the pressure plate 3 up and down, applying constraint to the battery cover 1 during the welding process. Alternatively, a fixing hole can be provided at the end of the pressure plate 3, allowing it to be locked to the base 2 using screws or bolts, thereby applying constraint to the battery cover 1. Furthermore, the pressure applied by the pressure plate 3 to the battery cover 1 can be adjusted by changing the lowest position of the drive structure or the tightening of the bolts.

[0024] Please see Figure 5-8 In one embodiment of this utility model, the limiting member 4 includes several sets of end blocks 41 and several sets of side blocks 42. Each set of end blocks 41 includes two oppositely arranged end blocks 41, and the distance between the two end blocks 41 in the same set is consistent with the length dimension of the battery cover 1, so as to form a limiting on the outer sides of both ends of the battery cover 1. Each set of side blocks 42 includes two oppositely arranged side blocks 42, and the distance between the two side blocks 42 in the same set is consistent with the width dimension of the battery cover 1, so as to form a limiting on both sides of the battery cover 1.

[0025] Please see Figure 5-7 In one embodiment of this utility model, the support member 5 can correspond to the middle bottom surface of the battery cover 1. Furthermore, a positioning part 43 is fixedly provided on the inner side of the end block 41. The top dimension of the positioning part 43 is lower than the top dimension of the end block 41 so as to form positioning and support at both ends of the battery cover 1, ensuring the placement accuracy and stability of the battery cover 1.

[0026] Please see Figure 5 In one embodiment of this utility model, several sets of end latches 41 and side latches 42 are arranged sequentially along the length of the base 2, with each set of end latches 41 corresponding to at least one set of side latches 42. Specifically, the number of accommodating spaces formed by the end latches 41 and side latches 42 is several, and they can be arranged sequentially along the length of the base 2. In this way, multiple battery cover plates 1 can be placed simultaneously, and then constraints can be applied simultaneously by the pressure plate 3. This can effectively improve the production efficiency of the battery cover plates 1 and increase the utilization rate of the tooling.

[0027] Please see Figure 5In one embodiment of this utility model, each set of end latches 41 can be correspondingly provided with two sets of side latches 42. Specifically, the two end latches 41 and the four side latches 42 enclose a receiving space. The side latches 42 of two adjacent receiving spaces are shared, which can effectively improve the utilization rate of the top surface space of the base 2 and accommodate more battery cover plates 1. The size of the outermost side latch 42 is larger than the size of the other side latches 42 to ensure its strength.

[0028] Please see Figure 3 In one embodiment of this utility model, the side of the pressure plate 3 near the base 2 can protrude to form a contact portion 7, the position of which matches the position of the accommodating space. This ensures a tight contact between the pressure plate 3 and the top surface of the cover plate, guaranteeing the effectiveness of the constraint on the cover plate. The clearance notch 6 can include a first notch and a second notch. The first notch can correspond to the pole portion on the cover plate, and a guide portion is provided at the end of the first notch away from the base 2, thereby facilitating the production operation of the pole. The second notch can be used to correspond to an explosion-proof valve or other related structures.

[0029] Please see Figure 9 In one embodiment of this utility model, a cooling channel 8 is provided inside the pressure plate 3, and an inlet and an outlet are provided on the side of the pressure plate 3. Thus, during use, a cooling medium (such as low-temperature gas, water, or other liquid medium) can be introduced into the cooling channel 8 to effectively remove heat from the pressure plate 3. Simultaneously, it can cool the cover plate to a certain extent, mitigating the negative impact of welding thermal stress and ensuring welding quality and cover plate flatness. As a specific example, one end of the pressure plate 3 is provided with a water inlet and a water outlet, and the pressure plate 3 has a flow channel communicating with the water inlet and the water outlet. The flow channel can be directly opened inside the pressure plate 3 or can be connected to the outside (e.g., Figure 9 Then, it is connected to the external opening via a pipe. The inlet and outlet interfaces are connected to the water source so that the water can circulate within the channel and carry away heat.

[0030] The foregoing has provided a detailed description of one embodiment of the present invention, but the description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the scope of the claims of the present invention.

[0031] In the description of this utility model, it should be noted that the terms "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 used only for the convenience of describing this utility model and for 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. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0032] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A press-down tool for cap pole welding, characterized by, include: The base (2) has several limiting members (4) and support members (5) fixedly arranged on its top surface. The multiple limiting members (4) surround the support members (5) to form a receiving space for placing the battery cover plate (1). Pressure plate (3), the pressure plate (3) is provided with several clearance notches (6); When the pressure plate (3) is pressed onto the base (2), the position of the clearance notch (6) matches the position of the receiving space.

2. The press-down tooling for cap plate post welding of claim 1, wherein, The limiting member (4) includes several sets of end blocks (41) and several sets of side blocks (42). Each set of end blocks (41) includes two oppositely arranged end blocks (41), and the distance between the two end blocks (41) in the same set is consistent with the length dimension of the battery cover (1). Each set of side blocks (42) includes two oppositely arranged side blocks (42), and the distance between the two side blocks (42) in the same set is consistent with the width dimension of the battery cover (1).

3. The downsetter tooling for cap plate post welding of claim 1, wherein, The pressure plate (3) protrudes outward on one side near the base (2) to form a contact part (7), and the position of the contact part (7) matches the position of the accommodating space.

4. The downsetter tooling for cap plate post welding of claim 2, wherein, The avoidance gap (6) includes a first gap and a second gap.

5. The down-stroking tool for the cap plate post welding according to claim 4, characterized in that, A guide portion is provided at the end of the first notch away from the base (2).

6. The downsetter tooling for cap plate post welding of claim 2, wherein, A positioning part (43) is fixedly provided on the inner side of the end block (41).

7. The downsetter tooling for cap plate post welding of claim 2, wherein, Several sets of end blocks (41) are arranged sequentially along the length of the base (2).

8. The downsetter tooling for cap plate post welding of claim 2, wherein, Each set of end blocks (41) is provided with two sets of side blocks (42), and the two end blocks (41) and the four side blocks (42) enclose a receiving space.

9. The downsetter tooling for cap plate post welding of claim 1, wherein, The side blocks (42) of two adjacent accommodating spaces share the same one.

10. The down-stroking tool for cap plate post welding according to claim 1, wherein, The outermost side block (42) is larger than the other side blocks (42).

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