Limiting tool and battery assembly system

Abstract

The utility model relates to the technical field of battery assembly, and provides a limiting tool and a battery assembly system, which are applied to a battery pack and comprise a limiting block used for being connected with the outer wall of a shell of the battery pack and / or a partition plate. At least part of the structure of the limiting block is used for being placed between the outer wall of a shell of the battery pack and a battery cell module of the battery pack to form pressing limiting, and / or at least part of the structure of the limiting block is used for being placed between a partition plate of the battery pack and the battery cell module of the battery pack to form pressing limiting. According to the utility model, pressing constraint is formed between the outer wall of the shell and the battery cell module and / or between the partition plate and the battery cell module through the limiting blocks, and displacement suppression of the battery cell module is realized at the same time. The same limiting tool can act on two positioning references of the outer wall of the shell and the partition plate at the same time, a formula / soft package battery cell mixed line production is adapted, and the direct contact between the battery cell module and the box body / the partition plate is physically isolated, so that the short circuit risk caused by friction and collision in the transfer process is effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of battery assembly technology, and in particular to a limiting tooling and battery assembly system. Background Technology

[0002] In the field of new energy power battery manufacturing, the process of stacking battery cell modules into a battery box is a core production step. Currently, the commonly used technical solution in the industry is to directly stack the battery cells inside the battery box without setting any fixed tooling structure.

[0003] The battery cells are in a free state within the enclosure, lacking lateral and longitudinal constraints. During subsequent welding processes, the cells are prone to positional shifts due to vibration or mechanical handling, requiring repeated manual calibration. This increases the time required for each welding operation and severely impacts production efficiency. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to propose a limiting tooling to improve the efficiency of battery cell assembly.

[0005] To achieve the above and other related objectives, this utility model proposes a limiting fixture for use in a battery pack, the limiting fixture comprising:

[0006] A limiting block, the limiting block being used to connect the outer wall of the battery pack housing and / or the partition, the limiting block having at least a partial structure for being placed between the outer wall of the battery pack housing and the battery cell module of the battery pack to form a pressure limiting, and / or the limiting block having at least a partial structure for being placed between the partition of the battery pack and the battery cell module of the battery pack to form a pressure limiting.

[0007] In an optional embodiment of this utility model, the limiting block includes:

[0008] The first limiting block is used to connect to the outer wall of the housing;

[0009] The second limiting block is used to connect the partition.

[0010] In an optional embodiment of the present invention, a first limiting groove is provided on the first limiting block, and the first limiting groove is used to insert into the outer wall of the housing.

[0011] In an optional embodiment of the present invention, the first limiting groove includes a first groove wall and a second groove wall, the height of the first groove wall is greater than the height of the second groove wall, and the first groove wall is used to be inserted between the outer wall of the housing and the battery cell module to form a pressure limiting.

[0012] In an optional embodiment of this utility model, a first guide slope is provided on the first limiting block, and the first guide slope gradually approaches the battery cell module from top to bottom.

[0013] In an optional embodiment of this utility model, a second limiting groove is provided on the second limiting block, and the second limiting groove is used to insert the partition.

[0014] In an optional embodiment of the present invention, the second limiting groove includes a first side groove wall and a second side groove wall, the height of the first side groove wall is equal to the height of the second side groove wall, and the first side groove wall and the second side groove wall are used to be inserted between the partition and the cell module to form a pressure limiting.

[0015] In an optional embodiment of this utility model, a second guide slope is provided on the first limiting block, and the second guide slope gradually approaches the battery cell module from top to bottom.

[0016] In an optional embodiment of this utility model, the limiting block is made of insulating material.

[0017] This utility model also proposes a battery assembly system, including:

[0018] Box;

[0019] The battery cell module is placed inside the housing;

[0020] A transfer unit is used to transfer the container.

[0021] A welding unit is used to weld the battery cell module;

[0022] The limiting fixture is the aforementioned limiting fixture.

[0023] The technical advantages of this invention are as follows: This invention uses a limiting block to create a pressure constraint between the outer wall of the housing and the cell module, and / or between the partition and the cell module, thereby suppressing the displacement of the cell module. The same limiting fixture can act on both the outer wall of the housing and the partition as positioning references, making it suitable for mixed production lines of both square and pouch cells. By physically isolating the cell module from direct contact with the housing / partition, it effectively avoids the risk of short circuits caused by friction and collision during transport. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, 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 these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram showing the installation position of the limiting tooling in one embodiment of the present invention;

[0026] Figure 2 for Figure 1 Enlarged view of part A;

[0027] Figure 3 This is a schematic diagram of the structure of the first limiting block of the limiting tooling in one embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of the second limiting block of the limiting tooling in one embodiment of the present invention.

[0029] Explanation of reference numerals in the attached drawings: 1. Battery cell module; 2. Outer wall of the housing; 3. Partition; 10. First limiting block; 11. First limiting groove; 12. First groove wall; 13. Second groove wall; 14. First guide slope; 20. Second limiting block; 21. Second limiting groove; 22. First side groove wall; 23. Second side groove wall; 24. Second guide slope. Detailed Implementation

[0030] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0031] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0032] In the field of new energy power battery manufacturing, the stacking and packaging of battery cell modules is a core production step. Currently, the commonly used technical solution in the industry is to directly stack the battery cells 1 inside the battery case without any fixing fixtures. Specifically, this existing technology has the following drawbacks:

[0033] Positioning failure due to lack of fixing measures

[0034] The battery cells are in a free state within the casing, lacking lateral and longitudinal constraints. During subsequent welding processes, the cells are prone to positional shifts due to vibration or mechanical operation, requiring repeated manual calibration. This increases the welding time per operation by 30%-50%, severely impacting production efficiency.

[0035] Structural instability risk during transport

[0036] When the battery casing is subjected to external forces such as vibration or tilting during transportation, sliding friction occurs between the battery cells and the inner wall of the casing, causing the following problems:

[0037] Safety risks: Collisions between battery cells may cause casing deformation, electrode damage, or even internal short circuits;

[0038] Reset cost: After relocation, the machine needs to be stopped and the box needs to be disassembled for reset, which increases the time required for each process.

[0039] Adaptability limitations restrict production line compatibility

[0040] Traditional tooling is a single-size, customized design that cannot accommodate different battery cell models. When product specifications change, tooling must be redesigned and manufactured, resulting in high production line modification costs.

[0041] The contradiction between accuracy and reliability

[0042] Existing technologies attempt to suppress cell slippage by adding cushioning materials (such as foam), but the compression deformation of these materials leads to the following new problems:

[0043] After prolonged use, the cushioning material ages and loses its fixing function;

[0044] When the deformation recovery force is insufficient, the battery cell still has micro-displacement, which cannot meet the requirements of high-precision welding.

[0045] To achieve the above objectives and other related objectives, such as Figures 1 to 4 As shown, this utility model proposes a limiting tooling for use in battery packs, specifically semi-finished battery packs in the process of stacking battery cells into a box. The limiting tooling includes a limiting block.

[0046] The limiting block is used to connect the outer wall 2 of the battery pack housing and / or the partition 3. At least a portion of the limiting block's structure is used to be placed between the outer wall 2 of the battery pack housing and the battery cell module 1 of the battery pack to form a pressure-limiting mechanism, and / or at least a portion of the limiting block's structure is used to be placed between the partition 3 of the battery pack and the battery cell module 1 of the battery pack to form a pressure-limiting mechanism. A limiting support frame is designed inside the housing to constrain the battery cells both laterally and longitudinally. Electrode clamping is performed before welding to improve initial positioning accuracy. Flexible buffer support components, such as polymer fixing strips, are added inside the housing to improve the battery cell fixing effect.

[0047] like Figure 3 As shown, in an optional embodiment of this utility model, the limiting block includes:

[0048] The first limiting block 10 is used to connect to the outer wall 2 of the housing. The second limiting block 20 is used to connect to the partition 3. By designing the first limiting block 10 and the second limiting block 20, the fixing structure between the battery cell, the housing, and the partition 3 is elevated to a rigid constraint. This effectively prevents the battery cell from shifting during transportation or operation, reduces positioning deviations caused by battery cell instability, and ensures precise alignment of the battery cell during welding. The rigid support provided by the first limiting block 10 and the second limiting block 20 reduces friction and collision between the battery cell and the inner wall of the housing during transportation and transfer. This not only reduces the risk of physical damage to the battery cell (such as housing deformation or electrode damage) but also effectively prevents safety hazards such as internal short circuits within the battery cell.

[0049] like Figure 2 , 3 As shown, the first limiting block 10 has a first limiting groove 11, which is used to insert into the outer wall 2 of the housing. Through the tight fit between the first limiting groove 11 and the outer wall 2 of the housing, the battery cell can maintain a more stable position, avoiding positioning deviations and thus improving the accuracy of subsequent processes, especially the alignment accuracy during battery welding and assembly. The plug-in structure eliminates the need for bolt fixing, making installation simpler and reducing the risk of battery cell displacement due to installation errors. Compared to the traditional bolt fixing method, the plug-in installation method is simpler to operate, more efficient, and reduces installation time on the production line.

[0050] like Figure 2 , 3 As shown, the first limiting groove 11 includes a first groove wall 12 and a second groove wall 13. The height of the first groove wall 12 is greater than the height of the second groove wall 13. The first groove wall 12 is used to insert between the outer wall of the housing 2 and the cell module 1 to form a pressure limiting effect. The design difference between the first groove wall 12 and the second groove wall 13 makes the inserted cell module 1 and the outer wall of the housing 2 form a more stable pressure limiting effect. The differentiated height design enhances the stability of the inserted cell, effectively avoiding vibration or displacement of the cell during transportation or operation, thereby reducing the risk of cell damage. The height difference of the groove walls makes the cell module 1 less prone to displacement under external force, thereby improving the stability of the battery module.

[0051] like Figure 2 , 3As shown, the first limiting block 10 is provided with a first guide slope 14, which gradually approaches the battery cell module 1 from top to bottom. The design of the guide slope makes the insertion process smoother and provides greater flexibility and adaptability for different models of battery cell modules 1.

[0052] like Figure 2 , 4 As shown, the second limiting block 20 has a second limiting groove 21, which is used to insert the separator 3. The insertion design of the second limiting groove 21 with the separator 3 further enhances the fixing effect between the cell module 1 and the separator 3. This effectively prevents displacement of the cell module 1 caused by external forces or vibrations during assembly, improves the overall stability of the system, and ensures the safety of the battery module during use. The insertion design of the second limiting groove 21 eliminates the need for complex bolt fixing, reducing the complexity of assembly and labor costs during production. In particular, compared with traditional fixing methods, the insertion design can complete the process more quickly, shorten the production cycle, and improve production efficiency.

[0053] like Figure 2 , 4 As shown, the second limiting groove 21 includes a first side groove wall 22 and a second side groove wall 23. The height of the first side groove wall 22 is equal to the height of the second side groove wall 23. The first side groove wall 22 and the second side groove wall 23 are used to insert between the separator 3 and the cell module 1 to form a pressing and limiting force. The design of the equal height of the first side groove wall 22 and the second side groove wall 23 results in a more uniform pressing force between the inserted cell module 1 and the separator 3. This not only improves the contact stability between the cell and the separator 3, but also increases the ability to resist external vibration and impact. The groove wall with equal height design results in a uniform force between the inserted cell module 1 and the separator 3, increasing the stability of the structure and avoiding cell displacement or damage caused by uneven force. The uniform pressing force helps prevent the cell module 1 from being displaced or damaged due to vibration, external force, etc., ensuring the long-term stable operation of the battery module.

[0054] like Figure 2 , 4 As shown, the first limiting block 10 is provided with a second guide slope 24, which gradually approaches the battery cell module 1 from top to bottom. The design of the second guide slope 24 on the second limiting block 20 provides smoother guidance during the insertion process, making the installation of the battery cell module 1 smoother. The design of the guide slope plays an important role in improving the docking accuracy of the battery cell module 1 and reducing installation errors.

[0055] In an optional embodiment of this utility model, the limiting block is made of insulating material. Using an insulating material (such as bakelite) effectively prevents electrical short circuits or electrical interference during battery module assembly. Since the battery module contains multiple battery cells with high voltage and current, using a conductive material for the limiting block could lead to short circuits or electrical faults, affecting battery safety. The insulating material effectively isolates the battery cell module 1 from contact with other electrical conductors, reducing the risk of internal short circuits in the battery system and ensuring the safety of the assembly process. During the assembly and use of the battery system, the insulating material prevents direct contact between the battery module and external electrical components, reducing the occurrence of electrical accidents.

[0056] This utility model also proposes a battery assembly system, including a housing, a cell module 1, a transfer unit, a welding unit, and a limiting fixture:

[0057] Battery cell module 1 is placed inside the housing;

[0058] The transfer unit is used to transfer the housing; the transfer unit can smoothly move the battery cell module 1 from one process to another, avoiding collisions and damage. Through the efficient operation of the transfer unit, the battery cell module 1 can move quickly between different processes, reducing the time for manual intervention and material handling.

[0059] The welding unit is used to weld the battery cell module 1; the welding unit can accurately and efficiently complete the welding of the battery module, thus improving production efficiency.

[0060] The limiting fixture ensures the stable positioning of cell module 1 within the housing during assembly. Through the precise fixing of the limiting fixture, cell module 1 will not experience positional shifts or instability during transport and welding, ensuring the assembly accuracy of the battery module. In particular, the design of the limiting block provides effective support and docking, avoiding assembly problems caused by inaccurate positioning.

[0061] In summary, by using limiting blocks to create pressure constraints between the outer wall 2 of the housing and the cell module 1, and / or between the separator 3 and the cell module 1, multi-directional displacement suppression of the cell module 1 is achieved. The pressure distribution on the contact surface between the limiting blocks and the cell module 1 can be dynamically adjusted according to the thermal expansion of the battery during charging and discharging, maintaining the fixing force while avoiding cell deformation caused by excessive compression. The same limiting fixture can act on both the outer wall 2 of the housing and the separator 3 as positioning references, suitable for mixed production lines of square / soft-pack cells. By physically isolating the direct contact between the cell module 1 and the housing / separator 3, the risk of short circuits caused by friction and collision during transportation is effectively avoided. Breaking through the traditional single-point limiting mode, a "rigid-flexible coupling" three-dimensional constraint system is constructed through the synergistic effect of dual-path limiting by the outer wall 2 of the housing and the separator 3. While ensuring the positioning accuracy of the cell, the contradictory problems of "deformation caused by excessive fixing" and "displacement caused by flexible fixing" in the existing technology are solved, achieving a dual improvement in safety and reliability in the power battery assembly process.

[0062] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

[0063] Throughout this description, numerous specific details, such as examples of components and / or methods, are provided to provide a complete understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention may be practiced without one or more of these specific details or by other devices, systems, components, methods, parts, materials, components, etc. In other instances, well-known structures, materials, or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

[0064] Throughout this specification, references to "an embodiment," "embodiment," or "specific embodiment" mean that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of the present invention, but not necessarily in all embodiments. Therefore, the various representations of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout the specification do not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic of any specific embodiment of the present invention can be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the present invention described and illustrated herein may be based on the teachings herein and will be considered part of the spirit and scope of the present invention.

[0065] It should also be understood that one or more of the elements shown in the figures may be implemented in a more separate or more integrated manner, or may even be removed because they are inoperable in certain circumstances or provided because they may be useful for a particular application.

[0066] Furthermore, unless otherwise expressly stated, any arrows in the accompanying drawings should be considered illustrative only and not limiting. Additionally, unless otherwise stated, the term "or" as used herein is generally intended to mean "and / or". Where a term is anticipated to provide a separation or combination capability that is unclear, a combination of components or steps will also be considered as indicated.

[0067] As used herein and throughout the claims below, unless otherwise specified, “a” and “the” include the plural references. Similarly, as used herein and throughout the claims below, unless otherwise specified, “in” means “in” and “on”.

[0068] The above description of the embodiments shown in this utility model (including the content set forth in the abstract of the specification) is not intended to be an exhaustive enumeration or to limit the utility model to the precise forms disclosed herein. Although specific embodiments and examples of the utility model have been described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the utility model, as will be recognized and understood by those skilled in the art. As indicated, these modifications can be made to the utility model in accordance with the above description of the embodiments described herein, and such modifications will be within the spirit and scope of the utility model.

[0069] This document has generally described the systems and methods in detail to aid in understanding the present invention. Furthermore, various specific details have been set forth to provide a general understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention can be practiced without one or more specific details, or using other devices, systems, accessories, methods, components, materials, parts, etc. In other instances, well-known structures, materials, and / or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

[0070] Therefore, although the present invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the scope of the above disclosure, and it should be understood that in some cases, certain features of the present invention may be adopted without departing from the scope and spirit of the invention and without corresponding use of other features. Thus, many modifications can be made to adapt a particular environment or material to the essential scope and spirit of the present invention. The present invention is not intended to be limited to the specific terms used in the following claims and / or the specific embodiments disclosed as the best mode of carrying out the present invention, but the present invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Therefore, the scope of the present invention will be determined only by the appended claims.

Claims

1. A limiting fixture, characterized in that, The limiting fixture, applied to a battery pack, includes: A limiting block, the limiting block being used to connect the outer wall of the battery pack housing and / or the partition, the limiting block having at least a partial structure for being placed between the outer wall of the battery pack housing and the battery cell module of the battery pack to form a pressure limiting, and / or the limiting block having at least a partial structure for being placed between the partition of the battery pack and the battery cell module of the battery pack to form a pressure limiting.

2. The limiting fixture according to claim 1, characterized in that, The limiting block includes: The first limiting block is used to connect to the outer wall of the housing; The second limiting block is used to connect the partition.

3. The limiting fixture according to claim 2, characterized in that, The first limiting block has a first limiting groove, which is used to insert into the outer wall of the housing.

4. A limiting fixture according to claim 3, characterized in that, The first limiting groove includes a first groove wall and a second groove wall. The height of the first groove wall is greater than the height of the second groove wall. The first groove wall is used to insert between the outer wall of the housing and the battery cell module to form a pressure limiting.

5. A limiting fixture according to claim 3, characterized in that, The first limiting block is provided with a first guide slope, which gradually approaches the battery cell module from top to bottom.

6. A limiting fixture according to claim 2, characterized in that, The second limiting block has a second limiting groove, which is used to insert the partition.

7. A limiting fixture according to claim 6, characterized in that, The second limiting groove includes a first side groove wall and a second side groove wall. The height of the first side groove wall is equal to the height of the second side groove wall. The first side groove wall and the second side groove wall are used to be inserted between the partition and the cell module to form a pressure limiting.

8. A limiting fixture according to claim 6, characterized in that, The first limiting block is provided with a second guide slope, which gradually approaches the battery cell module from top to bottom.

9. A limiting fixture according to claim 1, characterized in that, The limiting block is made of insulating material.

10. A battery assembly system, characterized in that, include: Box; The battery cell module is placed inside the housing; A transfer unit is used to transfer the container. A welding unit is used to weld the battery cell module; The limiting fixture is the limiting fixture as described in any one of claims 1-9.

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