Injection molding battery assembly

Abstract

The utility model relates to the technical field of injection molding batteries, in particular to an injection molding battery assembly, which comprises a rubber frame, an assembly and a pressed plate, the rubber frame is enclosed to form a containing cavity with an opening, the assembly is arranged in the containing cavity, the assembly is formed by laminating and combining a plurality of battery cell monomers and elastic sheets along the thickness direction, and the pressed plate is arranged in the containing cavity. The elastic sheet is arranged between the battery cell monomers, and the pressed plate is arranged on the frame of the rubber frame and is used for sealing the accommodating cavity and limiting the position of the assembly. The foam is arranged between the battery cell monomers, so that the assembly formed by the battery cell monomers and the elastic sheet has certain elasticity, the assembly without different thickness errors can be well filled into a cavity formed by the rubber frame, and a good supporting effect is achieved to ensure that the battery cell monomers are not loosened; and when glue injection is carried out on the injection-molded battery, the glue injection can be carried out by controlling the appropriate thickness of the assembly in a manner of compressing the assembly, so that the appropriate thickness of the glue-injected battery after the glue injection is finished is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection molding battery technical field, specifically, injection molding battery assembly. BACKGROUND

[0002] Injection molding battery is the battery formed after using injection molding process to package the battery monomer, and the battery reaches insulation, moisture-proof and waterproof, chemical corrosion resistance by using hot melt adhesive to package, and the mechanical strength of the battery is strengthened by filling the gap between the battery monomer and the glue frame to realize the fixation of the battery monomer, due to these characteristics, injection molding battery is widely used in various mobile devices, such as portable electronic equipment, electric tools, unmanned aerial vehicles and the like, and meets the high requirements of battery safety, durability and environmental adaptability.

[0003] But in the actual use process, it is found that the middle of the battery is low and the periphery is high after injection molding, which leads to the fact that the appearance requirement of the customer cannot be met and the battery is prone to looseness. Therefore, the thickness of the battery monomer needs to be measured and graded before the battery is glued, and the appropriate pet sheet thickness is selected according to the thickness grading of the battery monomer, so that the thickness of the battery monomer with different thicknesses plus the thickness of the pet sheet remains relatively consistent, however, this method needs to measure the thickness of the battery monomer and needs to set multiple thicknesses of pet sheets to match the battery monomer, which increases the manufacturing process and improves the cost.

[0004] Therefore, it is urgent to invent an injection molding battery assembly. UTILITY MODEL CONTENTS

[0005] The utility model aims at: in view of the prior art, provide a kind of injection molding battery assembly, in the limitation of the bending trajectory of tab, prevent tab from inserting battery monomer while, fold simple structure is reliable.

[0006] To solve the above technical problems, the following technical solutions are adopted in the present application:

[0007] An injection molding battery assembly is provided, comprising a glue frame, a combination piece and a pressure plate. The glue frame forms a containing cavity with an opening. The combination piece is arranged in the containing cavity. The combination piece is composed of a plurality of battery monomers and elastic pieces stacked in the thickness direction. The elastic pieces are arranged between the battery monomers. The pressure plate is arranged on the frame of the glue frame to close the containing cavity and limit the position of the combination piece.

[0008] Further, the elastic piece is a foam, and one or more foams are arranged between any two battery monomers.

[0009] Further, the thickness of the foam is 0.5mm-1.0mm.

[0010] Furthermore, the Shore hardness of the foam is between 20C and 40C.

[0011] Furthermore, the shape of the foam is "hui" shaped.

[0012] Furthermore, it further includes a protection board, the protection board is provided with a metal protrusion, the glue frame is provided with a through hole matching the size of the metal protrusion, and the protection board is clamped with the glue frame through the through hole and the metal protrusion.

[0013] Furthermore, it further includes a rubber pad, and the rubber pad covers the surface of the protection board away from the glue frame.

[0014] Furthermore, the pressure-receiving board covers the frame of the glue frame.

[0015] Furthermore, the material of the pressure-receiving board is PET.

[0016] Furthermore, a handle is provided on the surface of the pressure-receiving board.

[0017] The beneficial effect of the present utility model is that: by arranging a foam between the battery cell monomers, the assembly formed by the battery cell monomers and the foam has a certain elasticity, and can better fill the cavity formed by the glue frame for assemblies with different thickness errors, has a good supporting effect to ensure that the battery cell monomers will not loosen, and when injecting glue into the injection molded battery, the thickness of the appropriate assembly can be controlled by compressing the assembly to inject glue, ensuring that the thickness of the injection molded battery after the injection is completed is appropriate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present utility model and constitute a part of the present utility model. The schematic embodiments and descriptions thereof are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0019] Figure 1 is an exploded view of the present utility model;

[0020] Figure 2 are the three views of the present utility model;

[0021] Figure 3 is one of the structural schematic diagrams of the present utility model;

[0022] Figure 4 is another structural schematic diagram of the present utility model;

[0023] Figure 5 is the third structural schematic diagram of the present utility model;

[0024] Figure 6 is the fourth structural schematic diagram of the present utility model;

[0025] Figure 7 The utility model discloses a structure diagram of foam.

[0026] Among them: 1 - glue frame;11 - containing cavity;12 - through -hole;13 - hardware protrusion;2 - combination piece;21 - electric core monomer;22 - elastic part;221 - foam;3 - pressure plate;4 - protection board;5 - rubber pad;6 - handle. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, instead of all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application. Unless otherwise defined, all the technical and scientific terms used in the present application have the same meanings as those commonly understood by those skilled in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments of the present application, instead of limiting the present application.

[0028] In the description of the present application, unless otherwise explicitly defined and limited, the terms "mounting", "connecting", "connecting", "fixing" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0029] Although the present application is disclosed as above with the preferred embodiments, it is not intended to limit the claims, and any person skilled in the art can make several possible changes and modifications without departing from the concept of the present application, therefore, the protection scope of the present application should be limited by the scope defined by the claims of the present application.

[0030] Injection-molded batteries are batteries formed by encapsulating individual battery cells using an injection molding process. The injection molding process typically involves injecting molten hot melt adhesive into the gaps between the assembled battery cells and the frame. The temperature and pressure of the hot melt adhesive are not too high. As the hot melt adhesive enters the gaps between the battery cells and the frame, it gradually cools and fills the gaps. Once the hot melt adhesive cools and hardens, it completes the encapsulation between the battery cells and the frame. After injection molding, the hot melt adhesive fills the gaps in the battery, making the battery seamless. This achieves insulation, moisture and water resistance, and chemical corrosion resistance. Furthermore, the filling of gaps between the battery cells and the frame helps to fix the battery cells, strengthening the battery's mechanical strength.

[0031] However, in actual use, it was found that because the object of injection molding is a battery, and batteries are easily damaged under high temperature and pressure, the temperature and pressure of the hot melt adhesive cannot be too high during the injection molding process. This causes the hot melt adhesive to solidify quickly after being injected into the battery. To improve energy density, the thickness of the plastic frame is often set to be very close to the thickness of the battery cell, meaning the molten hot melt adhesive only fills the perimeter and cannot penetrate into the center of the battery. Because the hot melt adhesive only enters at the edges, after solidification, there is greater pressure only at the edges of the individual battery cells. This often results in a situation where the center of the battery is lower than the perimeter, failing to meet customer appearance requirements and easily causing the battery to loosen. Therefore, before injecting the adhesive into the battery, the thickness of the individual battery cells needs to be measured and graded. Based on the thickness grade of the cell, an appropriate PET sheet thickness is selected to ensure a relatively consistent thickness after adding the PET sheet thickness to the cell cells of different thicknesses. However, this method requires measuring the thickness of the individual battery cells and setting multiple PET sheets of different thicknesses to match the individual cells, increasing manufacturing steps and costs.

[0032] This application makes the battery thickness adjustable by adding elastic elements, which can be adjusted according to the size of the injection molding space, reducing processes and saving costs, and providing comprehensive support for the individual battery cells.

[0033] like Figures 1-7 As shown, this application provides an injection-molded battery assembly, including a frame 1, an assembly 2, and a pressure plate 3. The frame 1 encloses an open receiving cavity 11. The assembly 2 is disposed within the receiving cavity 11. The assembly 2 is formed by stacking multiple battery cells 21 and elastic members 22 along the thickness direction. The elastic members 22 are disposed between the battery cells 21. The pressure plate 3 is disposed on the edge of the frame 1 to close the receiving cavity 11 and restrict the position of the assembly 2. When injecting glue, the pressure plate 3 can protect the battery from excessive force on the battery cells 21 when the mold is closed, and can also prevent the injected hot melt glue from leaking out.

[0034] The specific embodiment is that the elastic member 22 is pasted on the surface of the battery cell monomer 21, a plurality of battery cell monomers 21 are pasted to form the combined member 2, the combined member 2 is installed in the rubber frame 1, the pressure plate 3 is installed at the frame of the rubber frame 1, the assembled battery is placed in the mold of the injection molding machine, one side of the pressure plate 3 of the battery faces the direction of the mold closing and pressing of the injection molding machine, the appropriate mold closing and pressing pressure and distance are adjusted, the pressure plate 3 is first contacted when the mold is closed and pressed, the pressure received by the pressure plate 3 is transmitted to the combined member 2, the elastic member 22 of the combined member 2 is deformed to adjust the thickness of the elastic member 22 and thus the thickness of the combined member 2, the elastic deformation of the elastic member 22 is controlled by the mold closing force to make the battery reach the appropriate battery thickness, and then the battery is injected with glue. Since the thickness of the battery is consistent after the mold closing and pressing, the thickness of the battery is fixed after the injection and solidification, the thickness error of the battery is small, and the quality requirements of the product can be met.

[0035] Preferably, the elastic member 22 is a foam 221, and one or more foams 221 are arranged between any two battery cell monomers 21. By arranging the foam 221 in any battery cell monomer 21, the position deviation of the battery cell monomer 21 caused by the further increase of the error due to the non-uniform thickness of the battery cell monomer 21 in the horizontal direction after the stacking of the plurality of battery cells can be prevented, the cumulative effect of the stacking error can be inhibited, and the verticality deviation of the stacked battery cell can be controlled by the independent deformation of each foam 221.

[0036] Preferably, the thickness of the foam 221 is 0.5mm-1.0mm. When the extrusion of the foam 221 is small and the deformation of the foam 221 is small, the gap supported by the foam 221 is large, and the hot melt adhesive can flow into the gap between the foams 221. When the hot melt adhesive is solidified, the whole battery cell monomer 21 is fixed to ensure the stability of the battery structure. When the extrusion of the foam 221 is large, the gap between the foams 221 cannot allow the hot melt adhesive to flow in, but the compression amount of the foam 221 is large, so that the elastic support force of the foam 221 on the battery cell monomer 21 is large, which can effectively maintain the stability of the structure of the battery cell monomer 21.

[0037] Preferably, the Shore hardness of the foam 221 is 20C-40C. The appropriate hardness of the foam 221 can control the deformation of the foam 221 under pressure and provide a good support effect. The deformation of the foam 221 caused by the support force required by the battery cell monomer 21 is different when the hardness of the foam 221 is different. By controlling the appropriate hardness, the thickness adjustment range of the combined member 2 can be controlled.

[0038] As Figure 6As shown, preferably, the shape of the foam 221 is a "hui" character shape. Setting the foam 221 in this shape can provide a larger space for the lateral expansion of the foam 221 when it is compressed, and can also provide an expansion space for the expansion of the battery during use.

[0039] Preferably, it further includes a protection board 4. The protection board 4 is provided with a metal protrusion 13, and the glue frame 1 is provided with a through hole 12 that matches the size of the metal protrusion 13. The protection board 4 is snap-connected to the glue frame 1 through the through hole 12 and the metal protrusion 13. Connecting the protection board 4 and the glue frame 1 by snap connection has a relatively high structural strength, and can reduce the shaking of the protection board 4 during glue injection, resulting in unstable connection between the protection board 4 and the glue frame 1.

[0040] Preferably, it further includes a rubber pad 5. The rubber pad 5 covers the surface of the protection board 4 on the side away from the glue frame 1. By setting the rubber pad 5, the impact on the protection board 4 during glue injection can be reduced.

[0041] Preferably, the pressure-receiving plate 3 covers the outer frame of the glue frame 1. When the battery is subjected to mold closing and glue injection, the pressure-receiving plate 3 is arranged on the outer layer of the glue frame 1 to prevent the mold closing force from directly acting on the glue frame 1, resulting in damage to the glue frame 1 and inaccurate adjustment of the battery thickness.

[0042] Preferably, the material of the pressure-receiving plate 3 is PET. This material can prevent excessive rigidity during glue injection of the battery, resulting in stress concentration.

[0043] Preferably, a handle 6 is provided on the surface of the pressure-receiving plate 3. The handle 6 is beneficial for disassembling the battery shell.

[0044] The above description shows and describes several preferred embodiments of the present invention. However, as before, it should be understood that the present invention is not limited to the form disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed within the scope of the present invention's concept through the above teachings or the technology or knowledge in related fields. And the changes and modifications made by those skilled in the art that do not depart from the spirit and scope of the present invention should all be within the protection scope of the appended claims of the present invention.

Claims

1. An injection molded battery assembly, characterized by: The application relates to a battery pack, which comprises a rubber frame (1), an assembly (2) and a pressure plate (3), wherein the rubber frame (1) is used to form an accommodating cavity (11) with an opening, the assembly (2) is arranged in the accommodating cavity (11), the assembly (2) is formed by stacking a plurality of battery monomers (21) and elastic members (22) in the thickness direction, the elastic members (22) are arranged between the battery monomers (21), and the pressure plate (3) is arranged on the frame of the rubber frame (1) and used to close the accommodating cavity (11) and limit the position of the assembly (2).

2. The injection molded battery assembly of claim 1, wherein: The elastic member (22) is a foam (221), and one or more foams (221) are arranged between any two battery monomers (21).

3. The injection molded battery assembly of claim 2, wherein: The thickness of the foam (221) is 0.5-1.0 mm.

4. The injection molded battery assembly of claim 3, wherein: The Shore hardness of the foam (221) is 20-40C.

5. The injection molded battery assembly of claim 4, wherein: The shape of the foam (221) is a "back" shape.

6. The injection molded battery assembly of claim 1, wherein: The application further relates to a protection plate (4) provided with hardware protrusions (13), the rubber frame (1) is provided with through holes (12) matched with the hardware protrusions (13) in size, and the protection plate (4) is clamped with the rubber frame (1) through the through holes (12) and the hardware protrusions (13).

7. The injection molded battery assembly of claim 6, wherein: The application further relates to a rubber pad (5) covering the side surface of the protection plate (4) away from the rubber frame (1).

8. The injection molded battery assembly of claim 1, wherein: The pressure plate (3) covers the frame of the rubber frame (1).

9. The injection molded battery assembly of claim 8, wherein: The material of the pressure plate (3) is PET.

10. The injection molded battery assembly of claim 9, wherein: A handle (6) is arranged on the surface of the pressure plate (3).

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