A soft pack battery head support structure

Abstract

The utility model discloses a soft pack battery head support structure, which relates to the field of soft pack battery packaging technology, including a head fixing seat, which is used to support and position the head body; a connector, which is connected to the head fixing seat, and the connecting surface between the connector and the head fixing seat is provided with a continuous or discontinuous hollow part to reduce the connection area; a driving structure, which is connected to the connector and is used to apply an extrusion force to the connector. The thickness deviation of the soft pack sealed by the utility model is small and the deviation is easy to control.

Description

Technical Field

[0001] The utility model relates to the technical field of soft-pack battery packaging, and in particular to a soft-pack battery head support structure. Background Art

[0002] With the development of lithium battery processing and manufacturing industry, the manufacturing industry of soft-pack lithium battery has also entered a period of rapid development. Soft-pack battery is another name for polymer battery. Compared with lithium-ion battery, it has many advantages such as small size, light weight, high specific energy, high safety and flexible design. In the production process of soft-pack battery, there is a packaging process. The main function of this process is to externally package the welded battery cell to form a "bag", and the seal thickness is the key control point of this process. Usually, the vacuum packaging in the industry adopts a soft packaging method. The head is a parallel head, and the upper and lower iron dragons are glued. The upper and lower press-fit heat seals make the two pp layers of the aluminum-plastic film fuse together. With the development of the battery production process in the industry towards large, long and thick, the control of the seal thickness is becoming more and more difficult. The packaging structure design mainly includes three parts: head fixing seat, connector, and drive structure. Among them, the head fixing seat is used as a carrier to control the seal thickness. The design reliability of this structure is particularly important. In the prior art, when the seal length of the product reaches 300 mm, the elastic deformation of the head fixing seat and the connecting parts intensifies, and the parallelism of the upper and lower heads changes accordingly, which directly affects the parallelism consistency of the product and causes serious deviations in the seal thickness. Utility Model Content

[0003] Technical problems to be solved by utility models

[0004] In view of the technical problems that the elastic deformation of the existing long sealing length head structure is aggravated, resulting in a serious reduction in the parallelism consistency of the upper and lower heads and serious deviation in seal thickness, the utility model provides a soft-pack battery head support structure, which has a small thickness deviation of the sealed soft pack and the deviation is easy to control.

[0005] Technical Solution

[0006] In order to solve the above problems, the technical solution provided by the utility model is:

[0007] A soft-pack battery head support structure, including a head fixing seat, used to support and position the head body;

[0008] A connecting piece is connected to the head fixing seat, and a continuous or discontinuous hollow portion is provided at the connecting surface between the connecting piece and the head fixing seat to reduce the connection area; a driving structure is connected to the connecting piece and is used to apply extrusion force to the connecting piece.

[0009] The head fixing seat provides precise support and positioning for the head body and is the cornerstone of the stability of the entire packaging process.

[0010] The uniqueness of the connector lies in the fact that its connecting surface is provided with a continuous or discontinuous hollow portion. This ingenious design aims to reduce the actual contact area, so that when the extrusion pressure is applied, it can effectively suppress the elastic deformation of the head fixing seat and the connector, avoiding the parallelism misalignment and out-of-tolerance problems of the upper and lower heads due to the aggravated deformation.

[0011] The coordinated work of the drive structure and the connector can accurately control and transmit the required extrusion force, ensuring uniform force during the sealing process, further improving the stability and consistency of the seal, and effectively preventing the seal thickness from exceeding the tolerance, which is crucial to the performance and safety of the battery.

[0012] Optionally, the hollow portions are discontinuous, and multi-channel support portions are provided between the hollow portions.

[0013] The multi-channel support portion can improve the connection and force stability between the connecting piece and the head fixing seat, and the hollow portion can also suppress the elastic deformation of the head fixing seat and the connecting piece, so that the thickness deviation of the sealed soft package is small and the deviation is easy to control, balancing the parallelism consistency and connection and force stability of the product.

[0014] Optionally, both ends of the connecting member are connected to the head fixing seat to form end connecting parts.

[0015] The end connection parts are located at both ends to ensure that both ends of the connector are connected to the head fixing seat, avoiding the connector having an extra section without connection support with the head fixing seat, thereby causing the connector connection to become unstable.

[0016] Optionally, the end connection portion is flush with the end of the multi-channel support portion.

[0017] Ensure the stable connection between the connector and the head fixing seat, and reduce the inconsistency of the parallelism of the upper and lower heads caused by the connector itself.

[0018] Optionally, the ends of the multi-channel support portion are flush.

[0019] Ensure the stable connection between the connector and the head fixing seat, and reduce the inconsistency of the parallelism of the upper and lower heads caused by the connector itself.

[0020] As an option, the hollow portion is continuous.

[0021] The connecting piece has structures connected to the head fixing seat at only two ends, which greatly avoids the change of parallelism of the upper and lower heads due to the elastic deformation of the head fixing seat and the connecting piece, thereby affecting the parallelism consistency of the product.

[0022] Optionally, the top of the hollow portion is a plane.

[0023] The top of the flat hollow portion is easy to process.

[0024] Optionally, the top of the hollow portion is an arc-shaped top.

[0025] The curved top has a stronger structural strength than the top of the flat hollow portion and can provide better support.

[0026] Optionally, the connecting member is in a trapezoidal three-dimensional shape, with a smaller end connected to the driving structure and a larger end connected to the head fixing seat.

[0027] The trapezoidal three-dimensional connecting piece can ensure sufficient supporting strength when applying force, and can also evenly apply the force to the head fixing seat.

[0028] Beneficial Effects

[0029] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0030] This technical solution significantly improves the deformation control problem in the packaging process through the innovative design of setting continuous or discontinuous hollow parts to reduce the connection area and precise driving force control, ensuring the high precision and parallelism consistency of the soft-pack battery head support structure, thereby improving the overall quality and reliability of battery products. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic structural diagram of a soft-pack battery head support structure proposed in an embodiment of the utility model;

[0032] Figure 2 A second implementation of a soft-pack battery head support structure proposed in an embodiment of the utility model;

[0033] Figure 3 The third implementation method of a soft-pack battery head support structure proposed in the embodiment of the utility model;

[0034] Figure 4 A schematic diagram of the structure of an existing soft-pack battery head support structure proposed in an embodiment of the utility model;

[0035] 1. Head fixing seat; 2. Connecting parts; 3. Driving structure; 4. Hollow part; 5. Bolts; 6. Multi-pass supporting part; 7. Arc top. DETAILED DESCRIPTION

[0036] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings and embodiments.

[0037] Example 1

[0038] Combined with Figure 1A soft-pack battery head support structure includes a head fixing seat 1, which is used to support and position the head body. It is plate-shaped, and the head body is arranged on the end face of the head fixing seat 1. The head fixing seat 1 plays a supporting and positioning role to ensure the stability of the entire head structure.

[0039] The connector 2 is connected to the head fixing seat 1. A continuous or discontinuous hollow portion 4 is provided at the connection surface between the connector 2 and the head fixing seat 1 to reduce the connection area. The continuous or discontinuous hollow portion 4 forms a "bridge design" so that the extrusion force acts on the head fixing seat 1 through the connection to achieve force sharing. The hollow portion 4 does not contact the head fixing seat 1, isolating the elastic deformation caused by the extrusion force, and effectively achieving the optimization action of the consistency of the seal thickness.

[0040] In this embodiment, the hollow portions 4 are continuously distributed, and no multi-channel support portion 6 is arranged in the middle.

[0041] In this embodiment, the top of the hollow portion 4 is a plane.

[0042] In this embodiment, the connecting member 2 is in a trapezoidal three-dimensional shape, with a smaller end connected to the driving structure 3 and a larger end connected to the head fixing seat 1 .

[0043] The driving structure 3 is connected to the connecting member 2 and is used to apply extrusion force to the connecting member 2. When the driving structure 3 applies extrusion force, the extrusion force acts on the head fixing seat 1 through the connecting member 2, and the upper and lower heads act on the product surface at the same time to complete the sealing and forming of the aluminum-plastic film. The driving structure 3 can be a driving cylinder or other driving device.

[0044] In the prior art, when the seal length of the product reaches 300mm, the elastic deformation of the structural parts intensifies, and the parallelism of the upper and lower heads changes accordingly, which directly affects the consistency of the product and causes serious deviations in the seal thickness. Figure 4 : The current structure uses bolts 5 to connect the connecting piece 2 and the head fixing seat 1, the two are tightly fitted, and limit blocks are configured at both ends of the head. The sealing process is completed by heating and extruding the head to control the thickness.

[0045] The head fixing seat 1 and the connecting piece 2 include a split design and a connected design. The connection of the split design includes a bolt 5 pin connection and a dovetail groove connection, which are connected at the end connection part; the connected design is an integrated structure. The driving structure 3 and the connecting piece 2 are connected by a bearing and a pin shaft.

[0046] Example 2

[0047] Combined with Figure 2 , a soft-pack battery head support structure of this embodiment can be improved as follows compared with the technical solution of embodiment 1:

[0048] The hollow parts 4 are discontinuous, and multi-channel support parts 6 are arranged between the hollow parts 4. The distance between the multi-channel support parts 6 can be varied, and the multi-channel support parts 6 can be evenly distributed or scattered. In the case of scattered distribution, they are symmetrical about the midline of the connector 2 to balance the force.

[0049] In this embodiment, both ends of the connecting member 2 are connected to the head fixing seat 1 and form end connecting parts.

[0050] In this embodiment, the end connection portion is flush with the end of the multi-channel supporting portion 6 .

[0051] In this embodiment, the ends of the multi-channel supporting portion 6 are flush.

[0052] Example 3

[0053] Combined with Figure 3 , a soft-pack battery head support structure of this embodiment can be improved as follows compared with the technical solution of embodiment 1 or 2:

[0054] The top of the hollow portion 4 is an arc-shaped top 7. The arc-shaped top 7 has a stronger structural strength than the top of the flat hollow portion 4, and can provide better support. The curvature of the arc is set according to the size of the head structure. It is conceivable that in addition to the arc, the top can also be a stepped shape that can be used for modeling.

[0055] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A soft pack battery head support structure, characterized in that: include The head fixing seat is used to support and position the head body; A connecting piece connected to the head fixing seat, wherein a continuous or discontinuous hollow portion is provided at a connecting surface between the connecting piece and the head fixing seat to reduce a connecting area; The driving structure is connected to the connecting member and is used to apply a squeezing force to the connecting member.

2. A soft pack battery head support structure according to claim 1, characterized in that: The hollow parts are discontinuous, and multi-channel support parts are arranged between the hollow parts.

3. A soft pack battery head support structure according to claim 2, characterized in that: The two ends of the connecting piece are connected to the head fixing seat to form end connecting parts.

4. A soft pack battery head support structure according to claim 3, characterized in that: The end connection portion is flush with the end of the multi-pass support portion.

5. The soft pack battery head support structure according to claim 2, characterized in that: The ends of the multi-pass support portion are flush.

6. The soft pack battery head support structure according to claim 1, characterized in that: The hollow portion is continuous.

7. A soft pack battery head support structure according to claim 2 or 6, characterized in that: The top of the hollow portion is a plane.

8. The soft pack battery head support structure according to claim 1, characterized in that: The top of the hollow portion is an arc-shaped top.

9. The soft pack battery head support structure according to claim 1, characterized in that: The connecting piece is in a trapezoidal three-dimensional shape, with a smaller end connected to the driving structure and a larger end connected to the head fixing seat.

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