Battery cell packaging device

Abstract

The utility model belongs to the packaging box technical field relates to a kind of battery cell packaging devices, including the bottom tray, middle tray and upper tray sequentially arranged from bottom to top;Bottom tray is set on the one side close to middle tray bottom tray battery cell main body accommodating cavity;Upper tray is set on the one side close to middle tray upper tray battery cell top accommodating cavity;Middle tray is set on the one side close to bottom tray middle tray battery cell top accommodating cavity;Middle tray is set on the one side close to upper tray middle tray battery cell main body accommodating cavity;When bottom tray, middle tray and upper tray buckle, bottom tray battery cell main body accommodating cavity and middle tray battery cell top accommodating cavity between and middle tray battery cell main body accommodating cavity and upper tray battery cell top accommodating cavity between are formed battery cell accommodating cavity.The battery cell packaging device provided by the utility model solves the technical problems that blister tray is easily deformed or even broken in the existing battery cell packaging, and the internal battery cell cannot be effectively protected, and the packaging process is complex.

Description

Technical Field

[0001] This utility model belongs to the field of packaging box technology and relates to a battery cell packaging device. Background Technology

[0002] As the core component of various electronic devices and energy storage systems, the performance and safety of battery cells are receiving increasing attention. Battery cell packaging is a crucial step in protecting the cells and ensuring their normal operation. Traditionally, battery cells are packaged using Mylar film and a base tray. This method involves heating the area where the base tray contacts the cell using a heat-sealing device, melting the base material and bonding it to the bottom of the cell. Then, the Mylar film is placed over the cell, and the heat-sealing device is used again to heat and seal the connection between the Mylar film, the cell, and the base tray. However, this flexible packaging method is relatively expensive. Furthermore, the use of heat-sealing not only complicates the packaging process but also generates plastic fibers, debris, and sharp plastic edges during the heat-sealing process, posing a potential risk of short circuits to the internal circuitry of the battery cell, significantly impacting its safety and reliability.

[0003] See patent document CN109733696A, which discloses a soft-pack lithium-ion battery cell packaging structure, method, and application method. The battery cell is placed on a blister tray, and then the blister tray is placed inside a packaging box. While this achieves battery cell packaging, the following problems remain: when placing the blister tray inside the packaging box, the top layer is an empty blister tray, and a foam pressure plate and plastic cover must be placed on the empty blister tray, making the packaging process complex; moreover, since the blister tray is mostly made of plastic, it is easily deformed or even broken when subjected to external impact or heavy pressure, failing to effectively protect the internal battery cell.

[0004] Therefore, providing a battery cell packaging device that is less prone to deformation and breakage and has simpler packaging is currently the focus of research and development. Utility Model Content

[0005] In view of the technical problems described in the background art, such as the blister pack being easily deformed or even broken in existing battery cell packaging, which cannot effectively protect the internal battery cells and the complex packaging process, this utility model provides a battery cell packaging device.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A battery cell packaging device includes a bottom tray, a middle tray, and an upper tray arranged sequentially from bottom to top;

[0008] The bottom tray has a cavity for receiving the main body of the battery cell on the side near the middle tray; the upper tray has a cavity for receiving the top of the battery cell on the side near the middle tray.

[0009] The middle tray has a cavity for receiving the top of the middle tray battery cell on the side near the bottom tray; the middle tray has a cavity for receiving the main body of the middle tray battery cell on the side near the top tray.

[0010] When the bottom tray, middle tray, and top tray are snapped together, a cell receiving cavity is formed between the cell body receiving cavity of the bottom tray and the cell top receiving cavity of the middle tray, as well as between the cell body receiving cavity of the middle tray and the cell top receiving cavity of the top tray.

[0011] Further specified, a third clearance groove for the middle tray is provided at each of the four corners of the cavity at the top of the middle tray cell; a fourth clearance groove for the middle tray is provided on the side wall of the cavity at the top of the middle tray cell along the length direction.

[0012] Furthermore, the cross-section of the third clearance groove of the middle tray is arc-shaped.

[0013] Further specified, the top of the cell top receiving cavity of the middle tray is provided with a first clearance groove and a second clearance groove of the middle tray respectively; there are two second clearance grooves of the middle tray and they are arranged on both sides of the first clearance groove of the middle tray.

[0014] Furthermore, the middle tray cell body receiving cavity is provided with a middle tray slot.

[0015] Furthermore, the structure of the bottom tray cell body receiving cavity is the same as the structure of the middle tray cell body receiving cavity; the structure of the top tray cell receiving cavity is the same as the structure of the top tray cell receiving cavity.

[0016] Furthermore, there are multiple cell-containing cavities in the bottom tray and the top cell-containing cavities in the middle tray, and their positions correspond one-to-one; there are multiple cell-containing cavities in the middle tray and the top cell-containing cavities in the upper tray, and their positions correspond one-to-one.

[0017] Furthermore, the plurality of bottom tray cell body receiving cavities and the plurality of middle tray cell body receiving cavities are all distributed in a matrix manner.

[0018] Further defined, the middle tray can be one or more; multiple middle trays are stacked from bottom to top between the bottom tray and the top tray.

[0019] Furthermore, the bottom tray, middle tray, and top tray are all foam trays.

[0020] Compared with the prior art, the technical effects of this utility model are:

[0021] 1. In this utility model, the battery cell packaging device includes a bottom tray, a middle tray, and an upper tray arranged sequentially from bottom to top; a bottom tray battery cell body receiving cavity is provided on the side of the bottom tray near the middle tray; an upper tray battery cell top receiving cavity is provided on the side of the upper tray near the middle tray; a middle tray battery cell top receiving cavity is provided on the side of the middle tray near the bottom tray; and a middle tray battery cell body receiving cavity is provided on the side of the middle tray near the upper tray. This utility model provides excellent external protection for the battery cells during packaging, preventing deformation and breakage, and effectively protecting the internal battery cells; furthermore, the bottom tray, middle tray, and upper tray interlock to form a packaging box structure, simplifying the packaging process.

[0022] 2. In this utility model, by setting multiple clearance grooves, the top of the battery cell can be firmly locked in the formed receiving cavity, improving the protection and stability of the battery cell; it can also play a clearance role, so that during transportation, the battery cell is prevented from directly contacting the inner wall of the receiving cavity and generating friction, which would cause the bottom tray, middle tray and top tray to break and shed powder (i.e., foam falling off), ensuring the integrity of the device structure, thereby improving the support stability.

[0023] 3. In this utility model, there are multiple cell-containing cavities on the bottom tray and multiple cell-containing top cavities on the middle tray, and their positions correspond one-to-one; there are multiple cell-containing cavities on the middle tray and multiple cell-containing top cavities on the upper tray, and their positions correspond one-to-one, thereby forming multiple cavities and improving the packaging efficiency of the cells.

[0024] 4. In this utility model, there are one or more middle trays; multiple middle trays are stacked from bottom to top between the bottom tray and the top tray, which improves the packaging of the battery cells and forms a packaging box structure that is not easily deformed or damaged, thus improving the protection of the battery cells and simplifying the packaging process.

[0025] 5. In this utility model, the bottom tray, middle tray and top tray are all foam trays, which have better strength and stability and provide stronger protection for the battery cells; they also have a lightweight effect, making them easy to handle. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall battery cell packaging device;

[0027] Figure 2 This is a three-dimensional schematic diagram of the front of the bottom tray;

[0028] Figure 3 This is a top view of the front of the base tray;

[0029] Figure 4 This is a three-dimensional schematic diagram of the reverse side of the upper tray;

[0030] Figure 5This is a front view of the reverse side of the upper tray;

[0031] Figure 6 for Figure 5 Sectional view along line AA;

[0032] Figure 7 This is a three-dimensional schematic diagram of the upper (front) side of the middle tray;

[0033] Figure 8 This is a top view of the upper (front) side of the middle tray;

[0034] Figure 9 for Figure 8 Sectional view along line AA;

[0035] Figure 10 This is a three-dimensional schematic diagram of the lower (reverse) side of the middle tray;

[0036] Figure 11 This is a top view of the lower (reverse) side of the middle tray;

[0037] in:

[0038] 10-Bottom tray; 101-Bottom tray cell body receiving cavity; 102-Bottom tray slot; 103-Bottom tray first slot; 104-Bottom tray second slot; 20-Upper tray; 201-Upper tray cell top receiving cavity; 202-Upper tray first clearance groove; 203-Upper tray second clearance groove; 204-Upper tray third clearance groove; 205-Upper tray fourth clearance groove; 206-Upper tray handle position; 30- Middle tray; 31-Lower tray surface; 311-Top cavity for middle tray cells; 312-First clearance groove for middle tray; 313-Second clearance groove for middle tray; 314-Third clearance groove for middle tray; 315-Fourth clearance groove for middle tray; 316-Handle position for middle tray; 32-Upper tray surface; 321-Main cavity for middle tray cells; 322-Card slot for middle tray; 323-First card hole for middle tray; 324-Second card hole for middle tray. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0040] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0041] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0042] See Figure 1 In one embodiment of the present invention, the battery cell packaging device includes a bottom tray 10, a middle tray 30 and an upper tray 20 arranged sequentially from bottom to top.

[0043] See Figures 2-11 In this embodiment, a bottom tray 10 has a bottom tray cell body receiving cavity 101 on the side near the middle tray 30; an upper tray 20 has an upper tray cell top receiving cavity 201 on the side near the middle tray 30; a middle tray 30 has a middle tray cell top receiving cavity 311 on the side near the bottom tray 10; and a middle tray 30 has a middle tray cell body receiving cavity 321 on the side near the upper tray 20. When the bottom tray 10, middle tray 30, and upper tray 20 are snapped together, cell receiving cavities are formed between the bottom tray cell body receiving cavity 101 and the middle tray cell top receiving cavity 311, as well as between the middle tray cell body receiving cavity 321 and the upper tray cell top receiving cavity 201. This invention places the cell in the cell receiving cavity, providing excellent external protection for the cell, making it less prone to deformation and breakage, and effectively protecting the internal cell. Furthermore, the bottom tray 10, middle tray 30, and upper tray 20 snap together to form a packaging box structure, simplifying the packaging process.

[0044] Preferably, the bottom tray 10, the middle tray 30, and the top tray 20 are all foam trays. Specifically, they are foam trays made of polystyrene foam (REPS) with a density of 36 kg / m³. 3 It is white. The foam tray not only enhances the protection of the battery cells, but is also lightweight and easy to handle.

[0045] Preferably, the bottom tray 10 has dimensions of 1040×1040×65mm (length×width×height), and the four corners of the bottom tray 10 are rounded with a radius of R20mm; the top tray 20 has dimensions of 1040×1040×50mm (length×width×height), and the four corners of the top tray 20 are rounded with a radius of R20mm; the middle tray 30 has dimensions of 1040×1040×100mm (length×width×height), and the four corners of the middle tray 30 are rounded with a radius of R20mm.

[0046] In this embodiment, when fastened, the bottom tray 10 is located at the bottommost position. The bottom surface of the bottom tray 10 is flat, and a downwardly recessed bottom tray cell body receiving cavity 101 is formed on the top surface of the bottom tray 10. The middle tray 30 is placed on the bottom tray 10. The bottom surface of the middle tray 30 is the lower plate surface 31, and the top surface of the middle tray 30 is the upper plate surface 32. An upwardly recessed middle tray cell top receiving cavity 311 is formed on the lower plate surface 31, and a downwardly recessed middle tray cell body receiving cavity 321 is formed on the upper plate surface 32. The upper tray 20 is located above the middle tray 30, and an upwardly recessed upper tray cell top receiving cavity 201 is formed on the bottom surface of the upper tray 20. The top surface of the upper tray 20 is flat. The bottom tray cell body receiving cavity 101 and the middle tray cell top receiving cavity 311 are positioned opposite each other, forming a receiving cavity between them; the middle tray cell body receiving cavity 321 and the upper tray cell top receiving cavity 201 are positioned opposite each other, also forming a receiving cavity between them; thus, the middle tray 30 and the upper tray 20 are sequentially fastened to the bottom tray 10 to form an integrated structure, which is equivalent to having two layers of receiving cavities, realizing the placement and packaging of multiple cells, which not only improves the stability of the battery, but also facilitates packaging.

[0047] See Figure 9 , Figure 10 and Figure 11 In this embodiment, the four corners of the top cavity 311 of the middle tray cell are respectively provided with the third clearance groove 314 of the middle tray.

[0048] Preferably, the third clearance groove 314 of the middle tray is opened along the vertical direction of the top receiving cavity 311 of the middle tray battery cell, and the cross-section of the third clearance groove 314 is arc-shaped. The third clearance groove 314 of the middle tray leaves gaps between the four ends of the battery cell and the top receiving cavity 311 of the middle tray battery cell, avoiding direct and tight contact between the top of the battery cell and the inner wall of the top receiving cavity 311 of the middle tray battery cell. This reduces friction between the battery cell and the receiving cavity during transportation, avoiding damage to the middle tray 30 caused by friction from direct and tight contact, thereby improving the support and protection of the battery cell.

[0049] See Figure 9 , Figure 10 and Figure 11In this embodiment, a fourth clearance groove 315 of the middle tray is provided on the side wall of the top cavity 311 of the middle tray cell in the length direction.

[0050] Preferably, there are two fourth clearance grooves 315 in the middle tray, which are correspondingly formed on the symmetrical sidewalls along the length of the top cavity 311 of the battery cell in the middle tray. The fourth clearance grooves 315 in the middle tray make it easier for the battery cell to be inserted into the top cavity 311 of the battery cell in the middle tray, and at the same time, they avoid the side of the battery cell, so as to avoid excessive friction caused by too close contact, which could lead to wear and breakage of the top cavity 311 of the battery cell in the middle tray, thereby improving the support and load-bearing capacity of the middle tray 30.

[0051] See Figure 11 In this embodiment, a first clearance groove 312 and a second clearance groove 313 of the middle tray are respectively provided on the top of the middle tray cell top receiving cavity 311; there are two second clearance grooves 313 of the middle tray, which are arranged on both sides of the first clearance groove 312 of the middle tray.

[0052] In practice, the first clearance groove 312 and the second clearance groove 313 of the middle tray extend from the top of the cell top receiving cavity 311 of the middle tray towards the upper surface 32 of the middle tray. The first clearance groove 312 and the second clearance groove 313 of the middle tray are designed to match the positive and negative terminals of the cell. On the one hand, they provide clearance for the positive and negative terminals of the cell, preventing them from directly contacting the top of the cell top receiving cavity 311 of the middle tray and causing damage. On the other hand, they also act as a locking mechanism, effectively securing the top of the cell and preventing it from shaking during transportation.

[0053] According to the conventional lithium battery cell design structure, preferably, the first clearance groove 312 and the second clearance groove 313 of the middle tray are distributed sequentially along the length of the top receiving cavity 311 of the middle tray cell; and the first clearance groove 312 of the middle tray has a quincunx shape; the second clearance groove 313 of the middle tray has a square structure. The structural design of the first clearance groove 312 and the second clearance groove 313 of the middle tray can also be designed according to the structure of the battery cell it accommodates.

[0054] See Figure 9 and Figure 11 In this embodiment, middle tray handle positions 316 are respectively provided on the opposite side walls of the lower tray surface 31 of the middle tray 30. This facilitates fastening the lower tray surface 31 of the middle tray 30 onto the top surface of the bottom tray 10.

[0055] See Figure 7 , Figure 8 and Figure 9In this embodiment, a middle tray slot 322 is provided within the middle tray cell body receiving cavity 321. Specifically, middle tray slots 322 are respectively provided on the bottom and side walls of the middle tray cell body receiving cavity 321; the middle tray slots 322 on the bottom and side walls of the middle tray cell body receiving cavity 321 form a cross-shaped structure. Thus, during transportation, when the bottom of the cell is placed within the middle tray cell body receiving cavity 321, the middle tray slots 322 facilitate cell placement while reducing friction between the bottom and sides of the cell and the middle tray cell body receiving cavity 321, preventing the middle tray 30 from breaking.

[0056] See Figure 2 and Figure 3 In this embodiment, the structure of the bottom tray cell body receiving cavity 101 is the same as that of the middle tray cell body receiving cavity 321. Preferably, bottom tray slots 102 are respectively provided on the bottom and side walls of the bottom tray cell body receiving cavity 101; the bottom tray slots 102 on the bottom and side walls of the bottom tray cell body receiving cavity 101 form a cross-shaped structure. In this way, during transportation, the bottom of the cell can be secured in the bottom tray cell body receiving cavity 101, further improving the stability of the cell.

[0057] Preferably, the thickness of the bottom wall of the bottom tray cell body receiving cavity 101 is greater than 10mm, and the thickness of the bottom wall is the difference between the thickness of the bottom tray 10 and the recessed depth of the bottom tray cell body receiving cavity 101; the thickness of the side wall of the bottom tray cell body receiving cavity 101 is greater than 20mm. According to this size design, the entire receiving cavity can not only accommodate the cell well, but also the packaging structure has good support.

[0058] See Figure 4 , Figure 5 and Figure 6 In this embodiment, the structure of the top cavity 201 of the upper tray cell is the same as that of the top cavity 311 of the middle tray cell. A first clearance groove 202 and a second clearance groove 203 are respectively provided on the upper surface of the top cavity 201 of the upper tray cell. There are two second clearance grooves 203, located on either side of the first clearance groove 202. The structure and function of the first clearance groove 202 and the first clearance groove 312 of the middle tray are the same, and the structure and function of the second clearance groove 203 and the second clearance groove 313 of the middle tray are also the same. Therefore, the descriptions of the first clearance groove 312 and the second clearance groove 313 of the middle tray can be referred to, and will not be elaborated upon here.

[0059] According to the conventional lithium battery cell design structure, the first clearance groove 202 and the second clearance groove 203 of the upper tray are sequentially distributed along the length of the upper tray cell top receiving cavity 201. Preferably, the first clearance groove 202 of the upper tray has a quincunx shape; the second clearance groove 203 of the upper tray has a square shape.

[0060] In this embodiment, a third clearance groove 204 is provided at each of the four corners of the upper tray cell top receiving cavity 201. The third clearance groove 204 is opened along the vertical direction of the upper tray cell top receiving cavity 201. Therefore, the cross-section of the third clearance groove 204 is arc-shaped. The third clearance groove 204 leaves a gap between the four ends of the cell and the upper tray cell top receiving cavity 201, avoiding direct and tight contact between the top of the cell and the inner wall of the upper tray cell top receiving cavity 201. This reduces friction between the cell and the battery packaging structure during transportation, avoids friction caused by direct and tight contact that could lead to the upper tray 20 breaking and shedding powder, prevents damage to the packaging device, and thus improves the supporting force.

[0061] In this embodiment, a fourth clearance groove 205 is formed on the side wall of the upper tray cell top receiving cavity 201 along its length. The fourth clearance groove 205 is formed along the vertical direction of the upper tray cell top receiving cavity 201. Preferably, there are two fourth clearance grooves 205, correspondingly formed on opposite side walls of the upper tray cell top receiving cavity 201 along its length. The fourth clearance groove 205 makes it easier for the cell to be secured in the upper tray cell top receiving cavity 201, while also providing clearance for the sides of the cell. This design leaves gaps between the top and sides of the cell and the upper tray cell top receiving cavity 201, preventing direct contact between the top of the cell and the upper tray cell top receiving cavity 201. This reduces deformation and damage to the packaging structure caused by friction between the cell and the battery packaging structure during transportation, and improves the support performance of the cell.

[0062] In this embodiment, upper tray handle positions 206 are respectively provided on the opposite side walls of the lower bottom surface of the upper tray 20. This facilitates fastening the bottom surface of the upper tray 20 onto the upper tray surface 32 of the middle tray 30.

[0063] In this embodiment, there are multiple bottom tray cell body receiving cavities 101 and multiple middle tray cell top receiving cavities 311, and their positions correspond one-to-one; there are multiple middle tray cell body receiving cavities 321 and multiple upper tray cell top receiving cavities 201, and their positions correspond one-to-one.

[0064] Preferably, the multiple bottom tray cell body receiving cavities 101 and the multiple middle tray cell body receiving cavities 321 are arranged in a matrix. Preferably, the thickness of the sidewall of the bottom tray cell body receiving cavity 101 and the thickness of the sidewall of the middle tray cell body receiving cavity 321 are both greater than 20 mm. When arranged in this array, the distance between two adjacent bottom tray cell body receiving cavities 101 and two adjacent middle tray cell body receiving cavities 321 is greater than 20 mm.

[0065] In implementation, the number of the bottom tray cell body receiving cavity 101, the middle tray cell top receiving cavity 311, the middle tray cell body receiving cavity 321, and the upper tray cell top receiving cavity 201 are all 6, 8, 16, 30, 40, 50, or 60. Thus, the number of the first layer of receiving cavities formed by the bottom tray cell body receiving cavity 101 and the middle tray cell top receiving cavity 311 is 6, 8, 16, 30, 40, 50, or 60. The number of the second layer of receiving cavities formed by the middle tray cell body receiving cavity 321 and the upper tray cell top receiving cavity 201 is also 6, 8, 16, 30, 40, 50, or 60.

[0066] The following explanation uses the example of 50 cavities per layer. In this case, each layer is arranged in an array of 5 columns × 10 rows, and each layer can independently accommodate 50 rectangular lithium battery cells at the same time.

[0067] The dimensions of the bottom tray cell housing cavity 101 are 174.8mm long × 71.5mm wide, and the depth of the bottom tray cell housing cavity 101 is 50mm. The thickness of the bottom tray 10 is 65mm, and the thickness of the bottom wall of the bottom tray cell housing cavity 101 is 15mm. The distance between two adjacent rows of bottom tray cell housing cavities 101 is 31.7mm, and the distance between two adjacent rows of bottom tray cell housing cavities 101 is 29.2mm. This design ensures that the bottom wall thickness of each bottom tray cell housing cavity 101 is greater than 10mm, and the side wall thickness is greater than 20mm, providing good support strength, meeting the load-bearing requirements of lithium battery cells, and providing excellent isolation and protection for the lithium battery cells.

[0068] The dimensions of the middle tray cell body receiving cavity 321 are the same as those of the bottom tray cell body receiving cavity 101.

[0069] The dimensions of the top cavity 201 of the upper tray cell are 178.2 mm long × 75.5 mm wide and 25 mm deep; the dimensions of the top cavity 311 of the middle tray cell are the same as those of the top cavity 201 of the upper tray cell.

[0070] The center position of the top cavity 201 of each upper tray cell coincides with the center position of the main cavity 321 of each middle tray cell; the center position of the main cavity 101 of each bottom tray cell coincides with the center position of the top cavity 311 of each middle tray cell, so that the cell can be stably locked between the main cavity 321 of the middle tray cell and the top cavity 201 of the upper tray cell, and between the main cavity 101 of the bottom tray cell and the top cavity 311 of the middle tray cell.

[0071] In another embodiment of this invention, to make the engagement of the bottom pallet 10, middle pallet 30, and upper pallet 20 more stable, a first bottom pallet locking hole 103 and a second bottom pallet locking hole 104 are correspondingly provided on opposite sides of the top surface of the bottom pallet 10. For example, the first bottom pallet locking hole 103 is provided on the left side and the second bottom pallet locking hole 104 is provided on the right side. Correspondingly, a first middle pallet locking post and a second middle pallet locking post are provided at opposite positions on the lower surface 31 of the middle pallet 30. The positions of the first middle pallet locking post and the first bottom pallet locking hole 103 are corresponding, and the first middle pallet locking post is locked in the corresponding first bottom pallet locking hole 103. The positions of the second middle pallet locking post and the second bottom pallet locking hole 104 are corresponding, and the second middle pallet locking post is locked in the corresponding second bottom pallet locking hole 104. This makes the lower surface 31 of the bottom pallet 10 and the middle pallet 30 stable, effectively avoiding increased friction caused by large shaking during transportation, thereby effectively reducing damage to the bottom pallet 10 and the middle pallet 30 caused by friction and improving the overall stability of the packaging device.

[0072] Preferably, both the first locking hole 103 and the second locking hole 104 of the bottom tray are blind holes. There are two of each type of locking hole; the two first locking holes 103 are symmetrically distributed on the left side of the bottom tray 10, and the two second locking holes 104 are symmetrically distributed on the right side of the bottom tray 10. The number of first locking holes 103 and second locking holes 104 can also be multiple, such as three or four, depending on the size of the bottom tray 10 and the number of battery cells it accommodates; details will not be elaborated here.

[0073] Preferably, to further improve the stability of the battery cell packaging assembly, the first locking hole 103 on the bottom tray is a cross-shaped hole; the second locking hole 104 on the bottom tray is an elongated hole. The structures of the first locking post on the middle tray and the second locking post on the middle tray are designed to match the structures of the first locking hole 103 and the second locking hole 104 on the bottom tray, respectively.

[0074] In this embodiment, a first locking hole 323 and a second locking hole 324 are provided on opposite sides of the upper surface 32 of the middle tray 30. For example, the first locking hole 323 is provided on the left side and the second locking hole 324 is provided on the right side. Correspondingly, a first locking post and a second locking post are installed at opposite positions on the bottom surface of the upper tray 20. The first locking post of the upper tray is locked in the corresponding first locking hole 323 of the middle tray, and the second locking post of the upper tray is locked in the corresponding second locking hole 324 of the middle tray, so as to realize the locking between the upper surface 32 of the upper tray 20 and the middle tray 30, thereby effectively reducing the damage to the upper tray 20 and the middle tray 30 caused by friction and improving the overall stability of the packaging device.

[0075] Preferably, the structure and number of the first locking holes 323 of the middle tray are the same as those of the first locking holes 103 of the bottom tray; the structure and number of the second locking holes 324 of the middle tray are the same as those of the second locking holes 104 of the bottom tray, and will not be described in detail here.

[0076] In another embodiment of this invention, there are multiple middle trays 30; the multiple middle trays 30 are stacked from bottom to top between the bottom tray 10 and the upper tray 20.

[0077] In practice, there may be two, three, four or more medium trays 30, depending on the actual number of battery cells accommodated and the overall size of the packaging device. This will not be elaborated here.

[0078] The following explanation uses three middle trays 30 as an example. The three middle trays 30 are stacked sequentially from bottom to top, with the bottom tray surface 31 facing down and the top tray surface 32 facing up. This forms the first layer of accommodating cavity 321 for the battery cell body. The bottom tray 10's battery cell body accommodating cavity 101 and the top accommodating cavity 311 of the middle tray 30 are interlocked to form the second layer of accommodating cavity. The middle tray 30's battery cell body accommodating cavity 321 and the second middle tray 30's top accommodating cavity 311 form the third layer of accommodating cavity. The middle tray 30 has a middle tray cell body receiving cavity 321, which is formed between the middle tray cell top receiving cavity 311 on the uppermost middle tray 30. The middle tray cell body receiving cavity 321 on the uppermost middle tray 30 has a middle tray cell top receiving cavity 201 on the upper tray 20, which forms a fourth layer of receiving cavity. This makes it easier to place more cells. Moreover, the bottom tray 10, the three middle trays 30 and the upper tray 20 are stacked from bottom to top and interlocked to form a packaging box structure, which simplifies the packaging process.

[0079] In implementation, when there are multiple middle trays 30, a first middle tray locking hole 323 and a second middle tray locking hole 324 are provided on the upper tray surface 32; a first middle tray locking post and a second middle tray locking post are provided on the lower tray surface 31. The positions of the first middle tray locking post and the first middle tray locking hole 323 are corresponding, and the first middle tray locking post is locked in the corresponding first middle tray locking hole 323; the positions of the second middle tray locking post and the second middle tray locking hole 324 are corresponding, and the second middle tray locking post is locked in the corresponding second middle tray locking hole 324, so as to realize the locking between multiple middle trays 30 and improve stability.

[0080] In this embodiment, the bottom tray 10, the middle tray 30, the upper tray 20, and the receiving cavities on each tray are all processed by an integrated injection molding process, resulting in better strength and stability.

[0081] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A battery cell packaging device, characterized in that, It includes a bottom tray (10), a middle tray (30) and an upper tray (20) arranged from bottom to top; The bottom tray (10) has a bottom tray cell body receiving cavity (101) on the side near the middle tray (30); the upper tray (20) has an upper tray cell top receiving cavity (201) on the side near the middle tray (30); The middle tray (30) is provided with a top cavity (311) for the middle tray cell on the side near the bottom tray (10); the middle tray (30) is provided with a main cavity (321) for the middle tray cell on the side near the upper tray (20); When the bottom tray (10), middle tray (30) and top tray (20) are snapped together, a cell receiving cavity is formed between the bottom tray cell body receiving cavity (101) and the middle tray cell top receiving cavity (311), as well as between the middle tray cell body receiving cavity (321) and the top tray cell top receiving cavity (201).

2. The battery cell packaging device according to claim 1, characterized in that, The four corners of the top cavity (311) of the middle tray cell are respectively provided with the third clearance groove (314) of the middle tray; the fourth clearance groove (315) of the middle tray cell is opened on the side wall in the length direction of the top cavity (311) of the middle tray cell.

3. The battery cell packaging device according to claim 2, characterized in that, The cross-section of the third clearance groove (314) of the middle tray is arc-shaped.

4. The battery cell packaging device according to claim 3, characterized in that, The top of the cell top receiving cavity (311) of the middle tray is provided with a first clearance groove (312) and a second clearance groove (313); there are two second clearance grooves (313) and they are arranged on both sides of the first clearance groove (312).

5. The battery cell packaging device according to claim 4, characterized in that, A middle tray slot (322) is provided inside the middle tray cell body receiving cavity (321).

6. The battery cell packaging apparatus according to any one of claims 1-5, characterized in that, The structure of the bottom tray cell body receiving cavity (101) is the same as that of the middle tray cell body receiving cavity (321); the structure of the top tray cell receiving cavity (201) is the same as that of the middle tray cell top receiving cavity (311).

7. The battery cell packaging device according to claim 6, characterized in that, The bottom tray cell body receiving cavity (101) and the middle tray cell top receiving cavity (311) are both multiple, and their positions correspond one-to-one; the middle tray cell body receiving cavity (321) and the upper tray cell top receiving cavity (201) are both multiple, and their positions correspond one-to-one.

8. The battery cell packaging apparatus according to claim 7, characterized in that, The multiple bottom tray cell body receiving cavities (101) and the multiple middle tray cell body receiving cavities (321) are all arranged in a matrix.

9. The battery cell packaging device according to claim 1, characterized in that, The middle tray (30) may be one or more; multiple middle trays (30) are stacked from bottom to top between the bottom tray (10) and the upper tray (20).

10. The battery cell packaging device according to claim 1, characterized in that, The bottom tray (10), middle tray (30) and top tray (20) are all foam trays.

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