Improved air bag type battery distribution plate bonding clamp and bonding method

Abstract

The invention discloses an improved air bag type battery distribution plate bonding clamp and bonding method, the improved air bag type battery distribution plate bonding clamp comprises a distribution plate, the front end and the rear end of the distribution plate are connected with a bonding clamp and a shell respectively, an air flow channel is reserved between the distribution plate and the bonding clamp, and a bonding base plate is further arranged at the air flow channel; a plurality of transverse grooves are formed in the bonding base plate and communicated with the air flow channel to form an exhaust channel. According to the improved clamp, in the bonding process of the distribution plate and the shell, air and redundant glue can be smoothly discharged, the conditions of hole blockage and shrinkage of the liquid inlet groove are avoided, the problems of hole blockage and shrinkage of the groove body are thoroughly eliminated, the percent of pass is increased to 100% from 45%, and the reliability of products is greatly improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of batteries, and in particular relates to an improved airbag-type battery distribution plate bonding fixture and bonding method. Background Art

[0002] In the battery assembly production process, the bonding process between the battery housing and the distribution plate is crucial. The design of the traditional airbag battery bonding fixture does not fully consider the problem of exhaust in the enclosed space. When the inverted 180° bonding process is adopted, a completely enclosed space will be formed between the bonding fixture and the distribution plate. Since air and excess glue cannot be discharged, the glue will block the liquid inlet hole during the curing process, and the liquid inlet groove will shrink and deform due to uneven internal pressure. After actual testing, 11 out of 20 products had problems with hole blockage and groove shrinkage, and the qualified rate was only 45%. This resulted in the need for frequent rework operations such as repairing holes and grooves, which not only reduced work efficiency but also caused high costs, seriously affecting production benefits.

[0003] The Chinese utility model patent with publication number CN222874381 U discloses a multifunctional clamp for clamping battery pole pieces and diaphragms. The cooperation of the limiter and the pressure component ensures the uniform distribution of glue during the curing process. The clamp design emphasizes the "limit reference surface" and elastic clamping to prevent the glue from penetrating into non-target areas due to uneven pressure; the Chinese utility model patent with publication number CN222088663 U discloses an automatic secondary sealing device for battery filling holes. Through the coordinated work of the steel ball delivery component, the top pressure component and the glue injection component, the efficient sealing of the filling hole is achieved. In its design, the positioning clamp can slide and accurately position the battery, and the transfer mechanism controls the glue injection path, reducing the risk of glue overflow or overfilling leading to blockage of the liquid inlet. The above two disclosed patents optimize the distribution of glue in different ways, but still cannot fundamentally solve the problem of glue clogging the liquid inlet during the curing process. Summary of the Invention

[0004] In order to solve the above problems, the present invention aims to provide an improved airbag battery distribution plate bonding fixture and bonding method.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions: an improved airbag-type battery distribution plate bonding fixture, comprising a distribution plate, wherein the front and rear ends of the distribution plate are respectively connected to the bonding fixture and the housing, an air flow channel is left between the distribution plate and the bonding fixture, and a bonding pad is also provided at the air flow channel;

[0006] The bonding pad is provided with a plurality of transverse grooves which are connected with the air flow channel to form an exhaust channel.

[0007] Furthermore, a plurality of symmetrical liquid inlet holes are provided in the middle of the distribution plate, and the symmetrical liquid inlet holes are in a straight line.

[0008] Furthermore, glue is coated around the distribution plate and between the liquid inlet holes of the distribution plate.

[0009] Furthermore, the transverse grooves on the bonding pad correspond to the symmetrical liquid inlet holes, and air and excess glue are discharged from the transverse grooves on the bonding pad.

[0010] Furthermore, the shape and spacing of the transverse grooves are determined according to the arrangement positions of the liquid inlet holes.

[0011] An improved bonding method for an airbag type battery distribution plate bonding fixture comprises the following steps:

[0012] Step 1: Apply glue on the distribution board;

[0013] Step 2: The shell and the distribution plate are bonded using an inverted 180° bonding process;

[0014] Step 3: The distribution plate is bonded to the fixture, and a bonding pad is provided at the bonding location. The transverse groove of the bonding pad is connected to the liquid inlet hole on the distribution plate to form an exhaust channel.

[0015] Furthermore, the glue coating in step 1 is applied around the distribution plate and in the area between the liquid inlet holes, and a glue-free area is reserved along the edge of the liquid inlet hole to prevent the glue from overflowing into the hole.

[0016] Furthermore, the steps 2 and 3 are specifically as follows: inverting the distribution plate 180°, aligning it with the shell and installing it so that the distribution plate and the shell are initially fitted together, and simultaneously pressing the adhesive pad onto the back of the distribution plate. The horizontal groove and the liquid inlet hole form an exhaust channel to break the enclosed space, allowing air and excess glue to flow out to the edge of the fixture.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. Improve product qualification rate: After the improvement, during the bonding process between the distribution plate and the shell, air and excess glue can be discharged smoothly, and the hole blockage and tank shrinkage problems will not occur. The qualification rate has been increased from 45% to 100%, greatly improving the reliability of the product.

[0019] 2. Improve work efficiency and reduce costs: It reduces the extra processes such as grooving and hole repairing caused by glue plugging, greatly shortens the production cycle, avoids material waste, and has good economic benefits.

[0020] 3. It has high economic benefits and scalability, and is suitable for existing inverted process production lines. There is no need to modify the main equipment. Only the bonding pad needs to be replaced to avoid hole blockage and tank shrinkage problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the specific embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a two-dimensional structural diagram during bonding in the present invention;

[0023] Figure 2 for Figure 1 Corresponding three-dimensional cross-sectional view;

[0024] Figure 3 This is a schematic diagram of the improved front bonding pad in the present invention;

[0025] Figure 4 Schematic diagram of the improved bonding pad in the present invention;

[0026] Figure 5 This is a schematic diagram of applying glue to the distribution plate of the present invention;

[0027] Figure 6 A schematic diagram showing a completely enclosed space formed between the bonding pad and the distribution plate during bonding before improvement;

[0028] Figure 7 Schematic diagram of the exhaust channel formed between the improved bonding pad and the distribution plate of the present invention

[0029] In the figure, 1-bonding fixture, 2-distribution plate, 21-liquid inlet, 3-shell, 4-bonding pad, 5-air flow channel, 6-glue, A-enclosed space, B-exhaust channel. DETAILED DESCRIPTION

[0030] The present invention is further described below with reference to the accompanying drawings and specific embodiments. However, it should not be understood that the scope of the subject matter described in the present invention is limited to the following embodiments. Without departing from the above technical ideas of the present invention, various modifications, substitutions and changes made according to common technical knowledge and customary means in the field are included in the scope of the present invention.

[0031] Reference Figure 3 and Figure 6 In the traditional airbag battery distribution plate bonding process, the following problems are caused by design defects:

[0032] 1. Formation of a completely enclosed space: When the distribution plate 2 and the housing 3 are bonded by inverting them 180°, a completely enclosed space A is formed between the bonding fixture 1 and the distribution plate 2. Air and excess glue 6 cannot escape. During the curing process, the glue expands due to heat, and the high pressure forces the glue to overflow toward the liquid inlet 21, eventually blocking the channel.

[0033] 2. Low production efficiency and product qualification rate. Eleven of the 20 distribution boards bonded together had their inlet holes clogged with glue, and the inlet slots shrank severely. This situation resulted in low product qualification rate and poor reliability. Furthermore, a large amount of excess material was generated during the assembly process, requiring additional steps such as slot and hole repair, which reduced work efficiency, increased rework costs, and impacted production efficiency.

[0034] The patent of this invention studies the use of an improved device and method for an airbag-type battery distribution plate bonding fixture. During the bonding process between the distribution plate and the shell, the blockage of the liquid inlet hole and the shrinkage of the liquid inlet groove are avoided, thereby improving the bonding qualification rate and work efficiency.

[0035] Reference Figure 1-Figure 2 、 Figure 4-Figure 7 The present invention features structural improvements, with the bonding pad 4 featuring a transverse slotted design. Several transverse slots are defined on its surface, corresponding one-to-one with the liquid inlet holes 21 of the distribution plate 2. The spacing of the transverse slots is dynamically adjusted based on the arrangement of the liquid inlet holes 21, ensuring that each liquid inlet hole 21 corresponds to at least one transverse slot, forming a continuous exhaust channel B. Air channels 5 are reserved between the distribution plate 2 and the bonding fixture 1, connecting to the transverse slots to form multiple exhaust channels B. Gas and glue are discharged along these exhaust channels from the edge of the bonding pad 4, preventing any residual glue.

[0036] The improved bonding method of the airbag type battery distribution plate bonding fixture comprises the following steps:

[0037] First, glue is applied on the distribution plate 2. The glue is applied around the distribution plate 2 and in the area between the liquid inlet holes 21. A glue-free area is reserved along the edge of the liquid inlet holes 21 to prevent the glue from overflowing into the holes.

[0038] Secondly, turn the distribution plate 2 upside down 180° and align it with the shell 3 so that the distribution plate 2 and the shell 3 are initially fitted together. Simultaneously, press the adhesive pad 4 onto the back of the distribution plate 2. The horizontal groove and the liquid inlet hole 21 form an exhaust channel to break the enclosed space, allowing air and excess glue to flow out to the edge of the fixture 1.

[0039] Example 1:

[0040] Problem analysis: By comparing the structure of the bonding surface of the distribution plate 2, it was found that a closed space was formed due to the inverted operation during bonding, and the air could not be discharged between the distribution plate 2 and the bonding pad 4 during bonding, which caused the glue to block the liquid inlet hole and shrink the liquid inlet groove.

[0041] Improvement measures: Open small grooves horizontally on the bonding pad to allow for ventilation. This method of horizontal grooving effectively solves the problem of poor ventilation in confined spaces.

[0042] Reference Figure 1 and Figure 2The device includes a bonding fixture 1, a distribution plate 2, a shell 3, a bonding pad 4 and an air flow channel 5. The front and rear bonding pads 4 are improved as shown in FIG. Figure 4 The synergistic effect of the transverse slots in the bonding pad 4 and the air flow channels 5 completely resolves the technical challenge of glue clogging the liquid inlet during the inverted bonding process. The combination of a glue barrier and a dynamic venting mechanism achieves controllable glue curing, significantly improving production efficiency and product reliability. This solution combines low cost, high compatibility, and scalability, providing an innovative solution for similar processes in battery manufacturing.

[0043] Working principle: When the distribution plate 2 is bonded to the housing 3, glue 6 is applied to the distribution plate 2 (see Figure 5 When the improved bonding pad 4 is used for bonding, a completely enclosed space A is formed between the bonding pad 4 and the distribution plate 2. Since air and excess glue cannot be discharged, the glue blocks the liquid inlet hole 21 during the curing process, and the uneven internal pressure causes the liquid inlet groove to shrink and deform.

[0044] When using the improved adhesive backing plate 4 for bonding, transverse grooves are provided along the plate, creating an exhaust channel. Air can escape along these grooves, preventing blockage. The improved fixture is compatible with the existing inversion process, requiring no changes to the operating procedures. This method effectively eliminates confined spaces, allowing air and excess glue to escape smoothly during the bonding process.

[0045] The present invention improves the product qualification rate. After the improvement, no one has the problem of hole blockage and liquid inlet tank shrinkage. The problems of hole blockage and tank shrinkage are completely eliminated. The qualification rate is increased from 45% to 100%, which improves the reliability of the product and reduces the generation of superfluous materials during the assembly process. It reduces the extra processes such as groove repair and hole repair caused by glue plugging the hole, greatly improves work efficiency, shortens the production cycle, eliminates the rework steps such as hole repair and groove repair, shortens the single-piece assembly time by 30%, reduces the tooling rework cost by 50%, and avoids material waste. It reduces the tooling rework cost and has strong promotional potential. It not only solves the design problem of the current distribution plate bonding fixture of the airbag liquid reservoir structure, but also provides a reliable solution for the subsequent production of products with similar structures. It has good economic benefits and application prospects.

[0046] The above describes in detail the improved airbag-type battery distribution plate bonding fixture and bonding method provided by the present invention. Specific examples are used herein to illustrate the structure and operating principles of the present invention. The description of the above embodiments is intended only to facilitate understanding of the method and core concept of the present invention. It should be noted that those skilled in the art may make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications fall within the scope of protection of the claims.

Claims

1. An improved airbag type battery distribution plate bonding fixture, characterized in that: It comprises a distribution plate (2), the front and rear ends of the distribution plate (2) are respectively connected to a bonding fixture (1) and a housing (3), an air flow channel (5) is left between the distribution plate (2) and the bonding fixture (1), and a bonding pad (4) is also provided at the air flow channel (5); The bonding pad (4) is provided with a plurality of transverse grooves which are connected to the air flow channel (5) to form an exhaust channel.

2. The improved airbag battery distribution plate bonding fixture according to claim 1, characterized in that: A plurality of symmetrical liquid inlet holes (21) are provided in the middle of the distribution plate (2), and the symmetrical liquid inlet holes (21) are in a straight line.

3. The improved airbag battery distribution plate bonding fixture according to claim 1, characterized in that: Glue (6) is coated around the distribution plate (2) and between the liquid inlet holes (21) of the distribution plate (2).

4. The improved airbag battery distribution plate bonding fixture according to claim 1, characterized in that: The transverse grooves on the bonding pad (4) correspond to the symmetrical liquid inlet holes (21), and air and excess glue are discharged from the transverse grooves on the bonding pad (4).

5. The improved airbag battery distribution plate bonding fixture according to claim 4, characterized in that: The shape and spacing of the transverse grooves are determined according to the arrangement positions of the liquid inlet holes (21).

6. A bonding method for the improved airbag battery distribution plate bonding fixture according to any one of claims 1 to 5, characterized in that: The following steps are included: Step 1: Apply glue on the distribution plate (2); Step 2: The housing (3) and the distribution plate (2) are bonded using an inverted 180° bonding process; Step 3: The distribution plate (2) is bonded to the fixture (1), and a bonding pad (4) is provided at the bonding location. The transverse groove of the bonding pad (4) is connected to the liquid inlet hole (21) on the distribution plate (2) to form an exhaust channel.

7. The bonding method of the improved airbag type battery distribution plate bonding fixture according to claim 6, characterized in that: The glue coating position in step 1 is the area around the distribution plate (2) and between the liquid inlet holes (21), and a glue-free area is reserved along the edge of the liquid inlet holes (21) to prevent the glue from overflowing into the holes.

8. The bonding method of the improved airbag type battery distribution plate bonding fixture according to claim 6, characterized in that: Specifically, the steps 2 and 3 are as follows: the distribution plate (2) is inverted 180 degrees and aligned with the shell (3) for installation, so that the distribution plate (2) and the shell (3) are initially fitted together, and the adhesive pad (4) is simultaneously pressed onto the back of the distribution plate (2), and the transverse groove and the liquid inlet hole (21) form an exhaust channel to break the enclosed space, so that air and excess glue flow out to the edge of the clamp (1).

9. The bonding method of the improved airbag type battery distribution plate bonding fixture according to claim 6, characterized in that: The qualified rate of products bonded by this method is increased from 45% to 100%.

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