Positioning blister tray of lithium ion battery with bent tab

Abstract

This utility model provides a lithium-ion battery positioning blister tray with bent tabs, including a box body and multiple battery fixing positions disposed within the box body. The box body includes a tray and side walls surrounding the edge of the tray, and the battery fixing positions are disposed on the tray. Each battery fixing position includes a tab positioning groove located at the front of the battery fixing position, and a limiting protrusion is provided at the rear end of the tab positioning groove. By setting the tab positioning groove and limiting protrusion and other structures, the bent tabs can be effectively fixed, preventing displacement and collision during transportation. It has the advantages of effectively fixing the bent tabs, improving transportation safety, and increasing production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of lithium-ion battery packaging and transportation technology, and more specifically, to a lithium-ion battery positioning blister tray with bent tabs and its components. Background Technology

[0002] After being manufactured by the cell factory, lithium-ion batteries undergo packaging processes including edge trimming, adhesive application, tab cutting and shaping, and dimensional and voltage testing. After tab cutting and shaping, the lithium batteries are placed in specialized blister trays. Multiple blister trays are then stacked and placed into cartons or other packaging materials for transport. However, with the development of battery technology, the directly protruding tabs (see...) have evolved... Figure 1 ) developed a bent tab 4 structure with a bent shape (see Figure 2 This presents new challenges to traditional packaging methods.

[0003] Traditional blister trays only restrain the main body of the battery cell, leaving the tabs completely exposed, making them highly susceptible to deformation during transportation. According to vibration test cases in industry standard GB 38031-2020, such deformation not only affects the product's appearance but can also lead to decreased battery performance and even safety hazards. To address this issue, some manufacturers have attempted to use adhesive tape or foam fillers to secure the tabs, but this method poses significant electrostatic risks and severely impacts the processing efficiency of both cell manufacturers and end-users.

[0004] The problems with existing technology are particularly pronounced when dealing with bent tabs, as the shape of the bent tabs makes them more prone to displacement during transportation. These issues directly impact the production efficiency and transportation safety of lithium batteries, increasing the risk of short circuits caused by tab deformation.

[0005] To address the aforementioned issues, existing technologies urgently need improvement. Utility Model Content

[0006] The purpose of this utility model is to provide a lithium-ion battery positioning blister tray and its components for bending electrode tabs, which has the advantages of effectively fixing the bent electrode tabs, improving transportation safety, and increasing production efficiency.

[0007] This utility model provides a lithium-ion battery positioning blister tray with bent tabs. The technical solution is as follows: it includes a box body and multiple battery fixing positions disposed in the box body. The box body includes a tray and a side wall surrounding the edge of the tray. The battery fixing positions are disposed on the tray. Each battery fixing position includes a tab positioning groove located at the front of the battery fixing position, and a limiting protrusion is provided at the rear end of the tab positioning groove.

[0008] Furthermore, this utility model also proposes that at least one partition protrusion is provided in the electrode positioning groove, and the partition protrusion is perpendicular to the limiting protrusion.

[0009] Furthermore, this utility model also proposes that a limiting plate is provided between two adjacent battery fixing positions.

[0010] Furthermore, this utility model also proposes that the limiting plate includes a front limiting plate located in front of the battery fixing position and a rear limiting plate located behind the battery fixing position; a battery removal groove with a height lower than the front limiting plate and the rear limiting plate is provided between the front limiting plate and the rear limiting plate.

[0011] Furthermore, this utility model also proposes that the two opposite sides of the front and rear limiting plates of the same limiting plate are both concave curved surfaces.

[0012] Furthermore, this utility model also proposes that the concave curved surface is connected to the top surfaces of the front limiting plate and the rear limiting plate through a convex curved surface.

[0013] Furthermore, this utility model also proposes that a partition protrusion is provided in the electrode positioning groove, and the partition protrusion is perpendicular to the limiting protrusion.

[0014] Preferably, the present invention also proposes that the height of the limiting protrusion, the partition protrusion, and the limiting plate does not exceed the height of the side wall.

[0015] Preferably, the present invention also proposes that the box body is provided with multiple rows of parallel battery fixing positions, wherein the battery fixing positions are arranged within the battery fixing position groups.

[0016] Furthermore, the box contains three parallel rows of battery mounting positions, with sub-sidewalls between adjacent battery mounting positions. The height of the sub-sidewalls is the same as that of the sidewalls. Each battery mounting position group has 10 battery mounting positions.

[0017] As can be seen from the above, the lithium-ion battery positioning blister tray and its components for bending electrode tabs provided by this utility model can effectively fix the bent electrode tabs by setting electrode tab positioning grooves and limiting protrusions, preventing displacement and collision during transportation. It has the advantages of effectively fixing the bent electrode tabs, improving transportation safety, and increasing production efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a direct-output electrode.

[0019] Figure 2 This is a schematic diagram of a bent electrode.

[0020] Figure 3 This is a schematic diagram of the present invention.

[0021] Figure 4 This is a left-side cross-sectional view of the present invention. Detailed Implementation

[0022] The technical solutions of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. The components of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but merely to illustrate selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0023] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this utility model, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. Example

[0024] This embodiment proposes a lithium-ion battery positioning blister tray with bent tabs, including a box body 1 and a plurality of battery fixing positions 2 disposed in the box body 1. The box body includes a tray 11 and a side wall 12 surrounding the edge of the tray 11. The battery fixing positions 2 are disposed on the tray 11. The battery fixing positions 2 include a tab positioning groove 21 located at the front of the battery fixing positions 2, and a limiting protrusion 22 is provided at the rear end of the tab positioning groove 21.

[0025] In this embodiment, the box body and tray can be made of transparent conventional PET or flame-retardant material, with a thickness of 0.4-1.0 mm and a corner radius of 0.5-1.0 mm. The depth of the tab positioning groove matches the bending of the tab. The limiting protrusion can also adopt a trapezoidal or semi-cylindrical structure. The tray and sidewall can be integrally injection molded, and a stacking positioning flange can be provided on the top of the sidewall to achieve stable stacking of multi-layer blister trays. As a preferred embodiment, the width of the tab positioning groove is 0.5-1 mm wider than the width of the tab to accommodate positional deviations when the tab is inserted.

[0026] This technical solution achieves three-dimensional positioning of the bent electrode tab through the synergistic action of the tab positioning groove and the limiting protrusion. The tab positioning groove restricts the displacement of the tab in the horizontal plane, while the limiting protrusion prevents the battery from moving back and forth, thus preventing deformation of the bent part of the tab due to stress. The box structure provides battery fixation while the side walls form an outer protective barrier, preventing direct collisions between external objects and the tab during transportation. Compared with existing technologies, this solution achieves tab positioning without additional fixing materials, avoiding electrostatic risks and improving packaging efficiency. The mechanical limiting method ensures that the tab maintains its preset bent shape during transportation, effectively solving the technical problem of tabs being easily deformed by impacts.

[0027] Furthermore, this utility model also proposes that at least one partition protrusion 23 is provided in the electrode positioning groove 21, and the partition protrusion 23 is perpendicular to the limiting protrusion 22.

[0028] The specific implementation methods of the partition bump include, but are not limited to, the following: the partition bump can be set as a rectangular, trapezoidal, or semi-circular protrusion structure, and its height is flush with or slightly lower than that of the limiting bump; the partition bump and the electrode positioning groove can be manufactured by an integral injection molding process; the number of partition bumps in the electrode positioning groove can be adjusted according to the number of electrodes. For example, setting a single partition bump can divide the positioning groove into two independent areas, which is suitable for electrodes with single anode and single cathode; more partition bumps can also be set to adapt to the situation of multiple electrodes; the surface of the partition bump in contact with the electrode can be provided with anti-slip texture or elastic buffer layer to enhance the limiting effect.

[0029] This technical solution utilizes a bidirectional limiting structure formed by the perpendicular arrangement of partitioning and limiting protrusions. The partitioning protrusions divide the electrode positioning groove into multiple independent areas, effectively preventing short circuits caused by contact between adjacent electrodes. Simultaneously, the perpendicular relationship between the partitioning and limiting protrusions can simultaneously constrain the longitudinal and lateral displacement of the electrode. Compared to the traditional single-dimensional limiting method relying solely on limiting protrusions, this structure improves the positioning stability of the bent electrode during transportation, eliminates the need for additional auxiliary fixing materials, avoids electrostatic risks, and maintains ease of operation.

[0030] Furthermore, this utility model also proposes that a limiting plate 3 is provided between two adjacent battery fixing positions 2.

[0031] The limiting plate can be implemented as follows: The limiting plate is a rectangular thin plate structure vertically fixed to the tray, with a thickness of 1-3mm and a height of 1 / 2 to 2 / 3 of the depth of the battery fixing position. The limiting plate is arranged parallel to the side wall of the battery fixing position, and its two ends are connected to the side wall of the adjacent battery fixing position. As a preferred embodiment, a guide slope with an angle of 30-45 degrees can be provided on the top of the limiting plate to facilitate guidance when the battery is inserted. The limiting plate is made of the same material as the box body, using impact-resistant modified polypropylene. Specifically, the limiting plate can be integrally molded with the tray through injection molding, or it can be assembled later using ultrasonic welding.

[0032] This technical solution creates a physical barrier by placing limiting plates between adjacent battery mounting positions, effectively preventing lateral displacement of the batteries during transportation. When the blister pack is subjected to vibration or impact, the limiting plates mechanically restrict the movement of the batteries, preventing adjacent batteries from colliding with each other. Compared with existing technologies, this structural improvement is simple and reliable, requiring no additional fixing materials. It maintains the lightweight characteristics of the blister pack while significantly improving the positional stability of the batteries during transportation. Consequently, the battery tabs maintain their preset bending shape during transportation, reducing the risk of tab deformation due to displacement.

[0033] Furthermore, this embodiment also proposes that the limiting plate 3 includes a front limiting plate 31 located in front of the battery fixing position 2 and a rear limiting plate 32 located in rear of the battery fixing position 2; a battery removal groove 33 with a height lower than that of the front limiting plate 31 and the rear limiting plate 32 is provided between the front limiting plate 31 and the rear limiting plate 32.

[0034] The battery pickup recess can be achieved as follows: the recess depth is 1 / 3 to 1 / 2 of the height of the limiting plate, and the recess width is 1.2 to 1.5 times the width of the battery. Alternatively, the height of the battery pickup recess can be zero, meaning it is indistinguishable from the tray. The front and rear limiting plates can be separate structures, fixed to the tray by clips or screws. The bottom of the recess can be flat or slightly curved, with rounded edges to avoid scratching the battery. As a preferred embodiment, guide ramps can be provided on both sides of the recess to facilitate battery placement and removal.

[0035] By incorporating height-differentiated battery access grooves on the limiting plate, a dedicated space for battery access is provided for operators while maintaining the longitudinal restraint function. Specifically, the groove height is lower than the main body of the limiting plate, allowing operators to insert their fingers into the groove area to directly contact the side of the battery, avoiding the obstruction of traditional one-piece limiting plates. Thus, while ensuring battery stability, the efficiency of battery access is significantly improved. Compared to existing technologies, this structural design requires no additional operating space and achieves enhanced operational convenience through simple structural improvements.

[0036] Furthermore, this embodiment also proposes that the two opposing sides of the front limiting plate 31 and the rear limiting plate 32 of the same limiting plate are both concave curved surfaces 34. The concave curved surfaces 34 can be achieved by arc transition or gradual curvature, with a curvature radius preferably of 5-15mm and a surface depth of 1-3mm. Specifically, the concave curved surfaces can be manufactured by CNC machining or hot-press vacuum forming, and the contour of the curved surface in contact with the battery needs to match the curvature of the battery side. As a preferred embodiment, the concave curved surfaces can be designed as a symmetrical hyperboloid structure, with the two curved surfaces forming a smooth transition in the middle of the limiting plate.

[0037] By designing the contact surface of the limiting plate as a concave curved surface, the contact between the battery and the limiting plate is transformed from traditional planar contact to curved surface contact. The concave curved surface structure disperses the contact pressure along the normal direction of the curved surface, increasing the contact area by 30%-50% compared to a planar structure, and reducing the maximum contact stress by more than 40%. This significantly reduces the compressive force per unit area on the battery surface, effectively avoiding stress concentration caused by planar limiting. Simultaneously, the curved surface structure provides natural guidance during battery placement and removal, reducing the frictional contact distance between the battery and the limiting plate. Compared to existing planar limiting structures, this solution, while maintaining positioning accuracy, prevents scratches on the battery surface and improves the smoothness of the placement and removal operation.

[0038] Furthermore, this embodiment also proposes that the concave curved surface 34 is connected to the top surfaces of the front limiting plate 31 and the rear limiting plate 32 through a convex curved surface 35.

[0039] A concave curved surface refers to an inwardly concave arc-shaped structure on the side of the limiting plate, and its radius of curvature can be adjusted according to the battery size. In specific implementation, the concave curved surface can be composed of a single circular arc or multiple composite circular arcs, while the convex curved surface is preferably a circular arc transition with a constant curvature.

[0040] By using a concave curved surface to reduce the contact friction area during battery placement and removal, and a convex curved surface to eliminate interference points caused by traditional right-angle connections, this design achieves a more efficient solution. Specifically, when the battery is placed or removed vertically, the concave curved surface only makes line contact with the battery's side surface, while the convex curved surface guides the battery smoothly to the top surface. This continuous curved transition structure ensures that the force on the battery is evenly distributed during placement and removal, avoiding jamming caused by localized stress concentration. Compared to existing right-angle limiting structures, this solution reduces the force required for battery placement and removal by approximately 40% while maintaining positioning accuracy, and effectively prevents scratches on the battery surface.

[0041] Furthermore, this embodiment also proposes that a partition protrusion 23 is provided in the electrode positioning groove 21, and the partition protrusion 23 is perpendicular to the limiting protrusion 22.

[0042] Furthermore, this utility model also proposes that the height of the limiting protrusion 22, the partition protrusion 23, and the limiting plate 3 shall not exceed the height of the side wall 22.

[0043] Specifically, the limiting protrusions restrict the displacement of the battery tabs in the front-to-back direction, the partition protrusions separate adjacent tabs, and the limiting plates fix the position of the battery and tabs in the left-to-right direction. The height of these limiting structures does not exceed the height of the sidewall, which can be achieved in the following ways: the height of the limiting protrusions is flush with or slightly lower than the sidewall; the height of the partition protrusions does not exceed the depth of the tab positioning groove; and the height of the limiting plates is flush with or slightly lower than the sidewall. In addition, the limiting plates may include a front limiting plate and a rear limiting plate, both of which are constrained by the height of the sidewall.

[0044] Therefore, this technical solution, by strictly controlling the height of the limiting structure, ensures that when multiple blister packs are stacked, the bottom of the upper blister pack will not interfere with the limiting protrusions, partition protrusions, or limiting plates of the lower blister pack. Specifically, the height limitation of the limiting protrusions and partition protrusions prevents the tab positioning area from protruding, while the height limitation of the limiting plate prevents interference with the battery fixing area. This design ensures battery fixing while enabling stable stacking of blister packs, reducing the risk of collisions during transportation and improving the reliability of packaging and shipping. Compared with existing technologies, this solution eliminates the need for additional cushioning materials or adjustments to the stacking spacing, reducing production costs and improving operational efficiency.

[0045] Furthermore, this embodiment also proposes that the box body 1 is provided with multiple rows of parallel battery fixing positions, and the battery fixing positions are arranged within the battery fixing position groups.

[0046] Specifically, the battery mounting positions can be arranged in parallel with equal spacing, with each group containing at least two battery mounting positions. The spacing between adjacent groups is adjusted according to the battery size. As a preferred embodiment, the battery mounting positions can be arranged in three columns, with each column containing 10 battery mounting positions, forming a standard matrix layout of 30 battery positions. The parallelism deviation between the battery mounting position groups must be controlled within ±0.5mm to ensure stacking stability.

[0047] A matrix arrangement of batteries can be achieved through multiple parallel rows of battery holders. The housing provides support as the basic structure, while each battery holder group maintains its own independent space, avoiding mutual interference between batteries and forming a neat array structure. This design allows the blister pack to accommodate more batteries within a limited space. Simultaneously, the matrix arrangement facilitates mechanized batch processing, ensuring precise positioning of each battery holder. During transportation, the inter-group structure effectively prevents battery displacement or tipping. Compared to a single-row layout, the multi-row parallel structure increases the overall rigidity of the blister pack and enhances its stacking load-bearing capacity.

[0048] Furthermore, this utility model also proposes that the box body is provided with 3 rows of parallel battery fixing positions, and a sub-side wall 13 is provided between adjacent battery fixing positions. The sub-side wall 13 is at the same height as the side wall 12, and each battery fixing position group is provided with 10 battery fixing positions 2.

[0049] Specifically, the battery mounting positions can be arranged in parallel with equal spacing. The thickness of the sub-sidewall is preferably 1.2-1.5mm, and it is integrally injection molded with the main sidewall. The 10 mounting positions in each battery mounting position group can be arranged in a straight line or staggered. As a preferred embodiment, a 0.5mm high anti-slip ridge can be provided on the top of the sub-sidewall to enhance stacking stability.

[0050] This technical solution increases the strength of the central part of the blister tray by setting sub-sidewalls, thus preventing deformation during stacking.

[0051] When lithium battery (with Figure 2 (For example) When the lithium battery is placed in the blister tray of this invention, the tab 4 is placed in the tab positioning groove 21, and the lithium battery body 43 is placed in the battery fixing position 2. To remove the lithium battery, simply remove it from the battery removal position groove 33.

[0052] The above description is merely an embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A positioning blister tray for lithium ion batteries with bent tabs, comprising a box body and a plurality of battery fixing positions arranged in the box body, characterized in that: The box body includes a tray and a side wall surrounding the edge of the tray, and a battery fixing position is set on the tray; the battery fixing position includes a tab positioning groove located at the front of the battery fixing position, and a limiting protrusion is provided at the rear end of the tab positioning groove. 2.The bent tab lithium ion battery positioning blister tray of claim 1, wherein: At least one partition protrusion is provided in the electrode positioning groove, and the partition protrusion is perpendicular to the limiting protrusion. 3.The bent tab lithium ion battery positioning blister tray of claim 2, wherein: A limiting plate is also provided between two adjacent battery fixing positions. 4.The bent tab lithium ion battery positioning blister tray of claim 3, wherein: The limiting plate includes a front limiting plate located in front of the battery fixing position and a rear limiting plate located behind the battery fixing position; a battery removal groove with a height lower than the front limiting plate and the rear limiting plate is provided between the front limiting plate and the rear limiting plate.

5. The buckling tab lithium ion battery positioning blister tray of claim 4, wherein: The two opposite sides of the front and rear limit plates of the same limiting plate are both concave curved surfaces.

6. The bucking tab lithium ion battery positioning blister tray of claim 5, wherein: The concave curved surface is connected to the top surfaces of the front limiting plate and the rear limiting plate through a convex curved surface.

7. The buckling tab lithium ion battery positioning blister tray of claim 5, wherein: A partition protrusion is provided in the electrode positioning groove, and the partition protrusion is perpendicular to the limiting protrusion.

8. The bent tab lithium ion battery positioning blister tray according to any one of claims 1-7, wherein: The height of the limiting protrusion, the partition protrusion, and the limiting plate does not exceed the height of the side wall.

9. The bent tab lithium ion battery positioning blister tray according to any one of claims 1-7, wherein: The box contains multiple rows of parallel battery fixing positions, with the battery fixing positions located within each battery fixing position group.

10. The bucking tab lithium ion battery positioning blister tray of claim 9, wherein: The box contains three parallel rows of battery mounting positions. Adjacent battery mounting positions are separated by sub-sidewalls, the height of which is the same as that of the sidewalls. Each battery mounting position group has 10 battery mounting positions.

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