A soft package battery module welding clamp

Abstract

The utility model discloses a kind of soft package battery module welding jigs, including clamp main body, upper pressing plate, welding pressing plate component one and welding pressing plate component two.The clamp main body is constituted by main bottom plate, lower bottom plate, side plate, lock catch one and lock catch two, for bearing and positioning battery module;The upper pressing plate is cooperated with lock catch two by hook two, to exert downward pressure to module;Welding pressing plate component one and welding pressing plate component two are connected by hook one and lock catch one, respectively for the welding of module middle copper bar and total positive, total negative copper bar.Welding pressing plate component is equipped with pressure nozzle component and tooth head mounting plate, and spring support is set between the two, for buffering pressure, to avoid tab damage.Compared with prior art, the utility model has the advantages of accurate positioning, avoiding welding slag into module, switching quickly, high welding quality and production efficiency improvement.

Description

Technical Field

[0001] This utility model relates to the field of battery module manufacturing technology, and in particular to a welding fixture for soft-pack battery modules. Background Technology

[0002] Currently, in the production process of pouch battery modules, the welding of the tabs is a critical step. Existing production methods mostly rely on manual operation for welding positioning. Due to differences in operator experience and stability, the tab positioning is often not precise enough, and the weld point position is prone to deviation, resulting in poor product consistency.

[0003] Meanwhile, during the welding process, due to the lack of an effective protective structure, weld slag can easily splash into the battery module, causing quality problems such as short circuits and poor soldering, affecting product safety and yield. In addition, existing fixtures have poor adaptability to different processes, usually requiring replacement or complex adjustments to meet the needs of different welding positions, resulting in low workstation switching efficiency and further restricting production efficiency.

[0004] Therefore, there is an urgent need for a welding fixture that can enable rapid module clamping, accurate welding positioning, convenient switching, and prevent welding slag from entering the module, so as to improve production efficiency and product quality. Utility Model Content

[0005] The purpose of this invention is to provide a welding fixture for soft-pack battery modules, which enables rapid clamping and positioning of modules, can adapt to different welding processes, improves the accuracy and consistency of welding points, and effectively prevents welding slag from splashing into the module.

[0006] This utility model is achieved using the following technical solution: a welding fixture for a soft-pack battery module, characterized in that it includes a fixture body, which is composed of a main base plate, a lower base plate, a side plate, a locking buckle one, and a locking buckle two, used to support the battery module and restrict the movement of the battery module in the X and Y directions; an upper pressure plate, which cooperates with the locking buckle two of the fixture body through a hook two to apply downward pressure to the battery module; a welding pressure plate assembly one and a welding pressure plate assembly two, which are respectively connected to the locking buckle one of the fixture body through a hook one, used to press the battery module tabs.

[0007] Furthermore, the first welding pressure plate assembly is used to press the series copper busbars of the intermediate cells of the battery module, and the second welding pressure plate assembly is used to press the total positive and total negative copper busbars of the battery module.

[0008] Furthermore, the second welding pressure plate assembly has an avoidance structure to avoid the portions of the total positive and total negative copper busbars that are higher than the battery cell tab plane.

[0009] Furthermore, both the first welding pressure plate assembly and the second welding pressure plate assembly include a pressure nozzle assembly and a tooth mounting plate, wherein the pressure nozzle assembly and the tooth mounting plate are connected by bolts.

[0010] Furthermore, a spring support is provided between the pressure nozzle assembly and the tooth mounting plate to provide cushioning during the clamping process and reduce the force on the electrode tab.

[0011] Furthermore, the upper pressure plate is further engaged with the hook of the welding pressure plate assembly via a latch to achieve secondary clamping of the battery module tabs.

[0012] Furthermore, the main base plate, lower base plate, and side plates of the fixture body are made of insulating material and are fixed together with bolts.

[0013] The beneficial effects of the soft-pack battery module welding fixture described in this utility model include: The battery module is stably positioned by the limiting and clamping action of the fixture body and the upper pressure plate, ensuring the accuracy and consistency of the welding points.

[0014] The welding pressure plate assembly adopts a pressure nozzle + spring buffer structure to prevent the electrode tab from being damaged due to excessive local stress during the welding process, while effectively reducing the risk of welding slag entering the module and improving product yield.

[0015] The welding pressure plate assembly is quickly assembled and disassembled through a hook and latch structure. Welding pressure plate assembly one is adapted for welding the middle copper busbar, and welding pressure plate assembly two is adapted for welding the main positive and main negative copper busbars. Switching between different processes is simple and quick. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a welding fixture for a soft-pack battery module; Figure 2 This is a structural schematic diagram of a welding pressure plate assembly; Figure 3 This is a schematic diagram of the second welding pressure plate assembly. In the figure, 1-clamp body, 2-main base plate, 3-lower base plate, 4-side plate, 5-lock one, 6-lock two, 7-upper pressure plate, 8-hook one, 9-hook two, 10-welding pressure plate assembly one, 11-welding pressure plate assembly two, 12-pressure nozzle assembly, 13-tooth head mounting plate. Detailed Implementation

[0018] 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.

[0019] 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. Example

[0020] like Figure 1 As shown, this embodiment provides a welding fixture for a soft-pack battery module, including a fixture body 1, an upper pressure plate 7, a welding pressure plate assembly 10, and a welding pressure plate assembly 11. The module is placed inside the fixture body 1 and is clamped and positioned by the upper pressure plate 7 and the welding pressure plate assembly, thereby ensuring the stability of the module during the welding process.

[0021] Specifically, the fixture body 1 is formed by bolting together a main base plate 2, a lower base plate 3, and a side plate 4, creating a single load-bearing cavity. The lower base plate 3 supports the battery module, while the main base plate 2 and side plates 4 restrict the module's movement in the X and Y directions, preventing displacement within the fixture. For clamping, the body is equipped with latch 5 and latch 6, which respectively engage with hooks on the upper pressure plate 7 and the welding pressure plate assembly. This hook-latch structure facilitates the clamping and releasing of the module, improving the efficiency of process switching.

[0022] The upper pressure plate 7 is bolted to hook 2 9, which then engages with latch 2 6 on the fixture body 1. When the upper pressure plate 7 is engaged, it applies downward pressure to the entire module, keeping the module stable during welding. Simultaneously, the upper pressure plate 7 is also equipped with latch 1 5, which cooperates with the welding pressure plate assembly, for further localized clamping during electrode tab welding.

[0023] The welding clamping assemblies are divided into two types: Welding Clamping Assembly One (10) and Welding Clamping Assembly Two (11). Welding Clamping Assembly One is mainly used for welding the series copper busbars of the intermediate battery cells in the module; Welding Clamping Assembly Two is used for welding the total positive and total negative copper busbars of the module. Since the installation height of the total positive and total negative copper busbars is higher than the battery cell tab plane, Welding Clamping Assembly Two incorporates a design to avoid interference with the copper busbars during clamping. This differentiated design allows the same set of fixtures to be adapted to both series welding of the module and welding of the total positive / total negative busbars.

[0024] In the welding pressure plate assembly, the pressure nozzle assembly 12 and the tooth mounting plate 13 are connected by bolts, and a spring support is set in the middle. The spring support can play a buffering role during the clamping process, avoiding damage to the battery cell tabs due to excessive local pressure, and can also improve the uniformity of stress at the welding point, thereby ensuring the welding quality.

[0025] In practical applications, the module is first positioned and fixed by the fixture body 1 and the upper pressure plate 7; then, in the first process, the welding pressure plate assembly 10 is used to complete the welding of the intermediate copper busbar; then, in the second process, the welding pressure plate assembly 11 is replaced to complete the welding of the total positive and total negative copper busbars. The entire switching process can be completed quickly by operating the hooks and latches, which greatly improves the efficiency of process connection.

[0026] Through the above design, the welding fixture provided in this embodiment can achieve precise positioning and ensure the consistency of weld points; through the cooperation of the nozzle assembly 12 and the spring support, damage to the electrode tabs is effectively avoided; through the differentiated design of welding pressure plate assemblies one and two, it can adapt to the welding requirements of different processes, ultimately improving the efficiency of module welding and product yield.

[0027] The above embodiments describe the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Modifications and variations made by those skilled in the art without departing from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A welding fixture for a soft-pack battery module, characterized in that, The fixture includes a main body (1), which is composed of a main base plate (2), a lower base plate (3), a side plate (4), a first latch (5), and a second latch (6), used to support the battery module and restrict the movement of the battery module in the X and Y directions; an upper pressure plate (7), which cooperates with the second latch (6) of the fixture body through a second hook (9) to apply downward pressure to the battery module; a welding pressure plate assembly (10) and a welding pressure plate assembly (11), which are respectively connected to the first latch (5) of the fixture body through a first hook (8) to press the battery module tabs.

2. The soft-pack battery module welding fixture according to claim 1, characterized in that, The first welding pressure plate assembly (10) is used to press the series copper busbars of the intermediate cells of the battery module, and the second welding pressure plate assembly (11) is used to press the total positive and total negative copper busbars of the battery module.

3. The soft-pack battery module welding fixture according to claim 2, characterized in that, The second welding plate assembly (11) has a clearance structure to avoid the portion of the total positive and total negative copper busbars that is higher than the battery cell tab plane.

4. The soft-pack battery module welding fixture according to claim 1, characterized in that, Both the first welding pressure plate assembly (10) and the second welding pressure plate assembly (11) include a nozzle assembly (12) and a tooth mounting plate (13), and the nozzle assembly and the tooth mounting plate are connected by bolts.

5. A soft-pack battery module welding fixture according to claim 4, characterized in that, A spring support is provided between the nozzle assembly (12) and the tooth mounting plate (13) to provide buffering during the pressing process and reduce the force on the electrode tab.

6. The soft-pack battery module welding fixture according to claim 1, characterized in that, The upper pressure plate (7) further cooperates with the hook (8) of the welding pressure plate assembly through the latch (5) to achieve secondary pressing of the battery module tabs.

7. A welding fixture for a soft-pack battery module according to claim 1, characterized in that, The main base plate (2), lower base plate (3) and side plate (4) of the fixture body (1) are made of insulating material and are fixed together by bolts.

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