A protection pallet and lithium battery

Abstract

The utility model discloses a kind of protection backing plate and lithium battery, belong to lithium battery technical field, protection backing plate, including backing plate ontology;The backing plate ontology is multi-section structure, each section includes at least one backing plate unit, two adjacent The backing plate unit is connected and two along connecting place can be folded;When protection backing plate and cell assembly, two adjacent The backing plate unit folding forms protection angle and covers the corner position of cell.The lithium battery includes shell, cover plate, cell and above-mentioned protection backing plate, the cell is placed in shell, the protection backing plate covers the bottom and side of cell, the cover plate seals shell;Protection backing plate and cover plate are fixed with cooperation in the side of the cell.The protection backing plate of the utility model can be folded to form the protection structure to cell corner, reduce cell corner drop damage.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, specifically to a protective tray and a lithium battery. Background Technology

[0002] In lithium battery structures, the battery protection tray is a crucial component. It not only provides insulation and protection for the stacked cores but also plays an important role in protecting the stacked cores from vibration damage and fixing the core position.

[0003] In the prior art, battery protection plates are mostly located at the bottom of the battery cell. For example, Chinese patent document CN215220790U discloses a battery cell and a bottom plate for the battery cell. The battery cell includes: a shell, a core, a top cover assembly, and a bottom plate. The bottom plate is located between the bottom wall of the shell and the bottom end of the core, and is connected to the core, for insulating the shell and the core.

[0004] Although the bottom support plate, or protective plate, in the aforementioned patent documents can protect the bottom of the battery cell, it cannot protect against damage to the corners of the battery cell (wound core, stacked core) caused by vibration and drop, thus affecting the performance of the battery cell. Utility Model Content

[0005] The purpose of this invention is to provide a protective tray and a lithium battery, which solves the problem that while the protective tray in the prior art can protect the bottom of the battery cell, it cannot protect against damage to the corners of the battery cell (wound core, stacked core) in the case of vibration and drop.

[0006] To achieve the above objectives, this utility model provides a protective tray, including a tray body; the tray body has a multi-segment structure, each segment including at least one tray unit, two adjacent tray units are connected and can be folded along the connection point; when the protective tray is assembled with the battery cell, the two adjacent tray units are folded to form a protective corner to cover the corner position of the battery cell.

[0007] Furthermore, a recessed groove is provided at the connection point of two adjacent pallet units, and the recessed groove is of the same length as the connection point.

[0008] The recessed groove provides clearance for the pallet unit when it is folded, preventing structural interference between adjacent pallet units 1 during folding. Furthermore, the recessed groove makes the thickness at the connection point smaller than the thickness of the pallet unit, making the pallet unit easier to fold.

[0009] Furthermore, the settling trough includes two slopes respectively disposed on adjacent pallet units, and a connecting surface connecting the two slopes.

[0010] Furthermore, the slope surface is either a planar structure or an arc-shaped structure.

[0011] The two slopes slope downwards, forming a sinkhole structure together with the connecting surface. The sinkhole structure can be planar or curved, and can flexibly adapt to different degrees of folding requirements, making it highly adaptable.

[0012] Furthermore, when two adjacent pallet units are folded, the two slopes approach or fit together.

[0013] Two slopes close together or touching can form a protective corner structure, covering the outside of the cell corner, protecting the cell corner and reducing the risk of collision damage.

[0014] Furthermore, the sink is located on the front and back of the pallet unit and their positions correspond.

[0015] The pallet unit can be folded along the groove on the front or the groove on the back. Moreover, designing grooves on opposite sides can further reduce the thickness of the groove area, making it easier for the pallet unit to fold.

[0016] Furthermore, the tray unit has multiple through holes.

[0017] Through holes give the battery cell good air permeability and liquid wetting effect, allowing liquids and gases to flow in or out.

[0018] Furthermore, the outermost pallet units at both ends of the pallet body are provided with fixing parts.

[0019] The fixing part can fix the folded pallet unit and increase the structural stability of the protective pallet.

[0020] This utility model also provides a lithium battery, including a casing, a cover plate, a battery cell, and the aforementioned protective tray. The battery cell is placed inside the casing, the protective tray covers the bottom and sides of the battery cell, and the cover plate seals the casing. The protective tray located on the side of the battery cell is fixed in place with the cover plate.

[0021] Furthermore, the surface of the battery cell is covered with an insulating film, which covers the outside of the protective tray and is fixed to the protective tray, and the insulating film avoids the through holes of the protective tray.

[0022] The protective tray covers the bottom and sides of the battery cell, protecting its corners and reducing the risk of damage to these areas during vibrations or drops. The insulating film avoids the through-holes in the protective tray, ensuring smooth flow of gas and liquid.

[0023] Compared with existing known technologies, the technical solution provided by this utility model has the following beneficial effects:

[0024] This utility model discloses a protective tray. The tray body adopts a multi-segment foldable structure, which facilitates transportation and can be folded during assembly, reducing assembly difficulty and making it very convenient. When assembling the protective tray with the battery cell, two adjacent tray units fold to form a protective corner that covers the corner of the battery cell. The structure of the protective corner can effectively cover the corner position, and at the same time, the protective corner has good impact resistance, further reducing damage to the corner position of the battery cell.

[0025] It is obvious that the elements or features described in the above individual embodiments can be used alone or in combination in other embodiments. Attached Figure Description

[0026] The dimensions and scales in the accompanying drawings do not represent the actual dimensions and scales of the product. The drawings are for illustrative purposes only, and some non-essential elements or features have been omitted for clarity.

[0027] Figure 1 This is a schematic diagram of the external structure of the lithium battery in an embodiment of this utility model;

[0028] Figure 2 This is an exploded view of the lithium battery structure in an embodiment of this utility model;

[0029] Figure 3 This is a schematic diagram of the assembly structure of the protective tray, battery cell, and cover plate in an embodiment of this utility model;

[0030] Figure 4 This is a schematic diagram of the flat state structure of the protective tray in an embodiment of this utility model;

[0031] Figure 5 This is a schematic diagram (one) of the settling tank structure in an embodiment of this utility model;

[0032] Figure 6 This is a schematic diagram (II) of the settling tank structure in an embodiment of this utility model;

[0033] Figure 7 This is a schematic diagram (iii) of the settling tank structure in an embodiment of this utility model;

[0034] Figure 8 This is a schematic diagram of the protective tray in the folded state in an embodiment of this utility model;

[0035] Figure 9 This is a schematic diagram of the cover plate and positioning post in an embodiment of this utility model.

[0036] Explanation of reference numerals in the attached figures

[0037] 100. Pallet body; 110. Pallet unit; 120. Settlement trough; 121. Slope; 122. Connecting surface; 130. Through hole; 140. Fixing part;

[0038] 200. Shell;

[0039] 300. Cover plate; 310. Positioning post;

[0040] 400, battery cell;

[0041] 500. Insulating film. Detailed Implementation

[0042] The present invention will now be described in detail with reference to the accompanying drawings. The embodiments described herein are merely preferred embodiments of the present invention. Those skilled in the art can conceive of other ways to implement the present invention based on the preferred embodiments, and such other ways also fall within the scope of the present invention.

[0043] Reference Figures 1-9 This embodiment provides a lithium battery, including a casing 200, a cover plate 300, a battery cell 400, and a protective tray. The battery cell 400 is placed inside the casing 200. The bottom and sides of the battery cell 400 have corners. The protective tray covers the bottom and sides of the battery cell 400, protecting these corners and reducing the risk of damage to the corners during vibration and drop scenarios. The cover plate 300 seals the casing 200. The protective tray located on the side of the battery cell 400 cooperates and is fixed with the cover plate 300, increasing the stability of the cooperation between the protective tray and the cover plate 300. Moreover, when the protective tray and the cover plate 300 are in contact, the protective tray completely covers the side of the battery cell 400, providing stable protection for the battery cell 400.

[0044] As a preferred embodiment of the protective tray structure, such as Figure 3 and Figure 4 As shown, the protective tray includes a tray body 100, which has a multi-segment structure. Each segment includes at least one tray unit 110. Adjacent tray units 110 are connected and can be folded along the connection point. The tray body 100 remains flat during incoming material transportation, facilitating transport. The multi-segment foldable structure is convenient for both transportation and assembly. Furthermore, the multi-segment structure allows for flexible folding to accommodate batteries of different sizes, offering high structural flexibility. When the protective tray is assembled with the battery cell 400, adjacent tray units 110 fold to form a protective corner that covers the corner of the battery cell 400. The protective corner effectively covers the corner and provides good impact resistance, further reducing damage to the corner of the battery cell 400.

[0045] It should be noted that the middle part of the folded tray body 100 is used to support the bottom of the battery cell 400, and the two sides are folded up, with the tray units 110 on both sides completely covering the sides of the battery cell 400. Alternatively, the tray units 110 on both sides cover the two sides of the battery cell 400.

[0046] To avoid structural interference between two adjacent pallet units 110 during folding, in some embodiments, a recessed groove 120 is provided at the connection point of two adjacent pallet units 110, and the recessed groove 120 is of the same length as the connection point. The recessed groove 120 provides clearance for the pallet unit 110 during folding, and the recessed groove 120 makes the thickness of the connection point smaller than the thickness of the pallet unit 110, making the pallet unit 110 easier to fold. It is understood that the recessed groove 120 has a certain strength and toughness, and can withstand folding without breaking.

[0047] Specifically, in some embodiments, such as Figures 4-7 As shown, the settling tank 120 includes two slopes 121 respectively disposed on adjacent support plate units 110, and a connecting surface 122 connecting the two slopes 121. The two slopes 121 slope downwards and, together with the connecting surface 122, form the structure of the settling tank 120. It should be noted that the slopes 121 can be planar or curved, and the corresponding connecting surface 122 can also be planar or curved.

[0048] It is understandable that two adjacent pallet units 110 form an angle when folded. Taking an angle of 90° as an example, when the two slopes 121 are flat or upwardly convex arc surfaces forming an angle, the two slopes 121 are in contact. When the two slopes 121 are downwardly concave arc surfaces forming an angle, the two slopes 121 are close but not in contact.

[0049] In some embodiments, the recess 120 is located on the front and back sides of the tray unit 110 and their positions correspond. Therefore, the tray unit 110 can be folded along the recess 120 on the front side or along the recess 120 on the back side. Moreover, designing the recess 120 on both opposite sides can further reduce the thickness of the recess 120, facilitating the folding of the tray unit 110. Here, "front side" refers to the side that carries and contacts the battery cell 400, and "back side" refers to the side opposite to the "front side".

[0050] The lithium-ion battery contains an electrolyte that wets the cell 400 and provides a basis for ion exchange. In some embodiments, the tray unit 110 has a plurality of through holes 130, which allow the cell 400 to have good air permeability and liquid wetting effect, enabling liquids and gases to flow in or out.

[0051] Furthermore, to increase the stability of the protective tray in supporting the battery cell 400, the outermost tray units 110 at both ends of the tray body 100 are provided with fixing parts 140. Specifically, as shown... Figure 9 As shown, the fixing part 140 has a fixing hole structure. Correspondingly, the stop frame of the cover plate 300 is provided with a positioning post 310, which cooperates with the fixing hole to keep the tray body 100 and the cover plate 300 fixed. The fixing hole and the positioning post 310 are fixed by mechanical cooperation or heat fusion.

[0052] It should be noted that in some implementation methods, such as Figure 2 As shown, the surface of the battery cell 400 is covered with an insulating film 500. Two parts of the insulating film 500 cooperate to cover the large surface, bottom, and side edges of the battery cell 400. Furthermore, the insulating film 500 covers the outside of the protective tray and is fixed to the protective tray by a hot-pressing process. The insulating film 500 avoids the through hole 130 of the protective tray to prevent obstruction of the through hole 130 and ensure smooth flow of gas and liquid.

[0053] There are various ways in which the insulating film 500 avoids the through hole 130. In some embodiments, the insulating film 500 adopts a split structure, consisting of at least two parts, which allows it to cover the battery cell 400 while avoiding the location of the through hole 130. In other embodiments, holes can be formed in the insulating film 500, with the positions of the holes corresponding to the through hole 130, thereby avoiding obstruction of the through hole 130.

[0054] In the description of this utility model, it should be noted that the terms "front," "rear," "left," "right," "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0055] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0056] The scope of protection of this utility model is defined only by the claims. Thanks to the teachings of this utility model, those skilled in the art will readily recognize that alternative structures to the disclosed structure can be used as feasible alternative implementations, and that the disclosed implementations can be combined to produce new implementations, which also fall within the scope of the appended claims.

Claims

1. A protective tray, comprising a tray body (100); characterized in that The pallet body (100) has a multi-segment structure, each segment including at least one pallet unit (110), and two adjacent pallet units (110) are connected and can be folded along the connection point; When the protective tray is assembled with the battery cell (400), two adjacent tray units (110) are folded to form a protective corner to cover the corner position of the battery cell (400).

2. A protective pallet according to claim 1, characterized in that A sinkhole (120) is provided at the connection point of two adjacent tray units (110), and the sinkhole (120) is of the same length as the connection point.

3. A protective pallet according to claim 2, characterised in that The settling trough (120) includes two slopes (121) respectively disposed on adjacent pallet units (110), and a connecting surface (122) connecting the two slopes (121).

4. A protective pallet according to claim 3, characterised in that The slope (121) is a planar structure or an arc-shaped structure.

5. A protective tray according to claim 3, characterized in that, When two adjacent pallet units (110) are folded, the two slopes (121) come close together or fit together.

6. A protective pallet according to claim 2, wherein The sink (120) is located on the front and back of the pallet unit (110) and their positions correspond.

7. A protective pallet according to claim 1, characterized in that The tray unit (110) has multiple through holes (130).

8. The protective pallet according to claim 1, wherein The outermost pallet units (110) at both ends of the pallet body (100) are provided with fixing parts (140).

9. A lithium battery, characterized by The device includes a housing (200), a cover plate (300), a battery cell (400), and a protective tray as described in any one of claims 1-8. The battery cell (400) is placed inside the housing (200), the protective tray covers the bottom and sides of the battery cell (400), and the cover plate (300) seals the housing (200). The protective tray located on the side of the battery cell (400) is fixed in place with the cover plate (300).

10. A lithium battery according to claim 9, wherein, The surface of the battery cell (400) is covered with an insulating film (500), which covers the outside of the protective tray and is fixed to the protective tray, and the insulating film (500) avoids the through hole (130) of the protective tray.

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