Top cover plate assembly, battery monomer and battery pack

Abstract

The utility model belongs to the technical field of batteries, and discloses a top cover plate assembly, a battery monomer and a battery pack. The top cover plate assembly comprises a top cover sheet, plastic coating and an aluminum block. The plastic coating is located on the side, away from the battery cell, of the top cover piece, a containing groove is formed in the side, away from the top cover piece, of the plastic coating, and a first chamfer and a second chamfer are arranged at the two opposite corners of the inner side wall of the containing groove respectively. An annular sinking groove is formed in the surface of the side, away from the top cover piece, of the aluminum block, a third chamfer and a fourth chamfer are arranged at the two opposite corners of the outer side wall of the aluminum block correspondingly, the third chamfer is matched with the first chamfer, the fourth chamfer is matched with the second chamfer, and the aluminum block can be placed in the containing groove. At least part of the side wall of the aluminum block and one side close to the top cover plate are wrapped by the plastic coating, the pole penetrates through the aluminum block, and the top surface of the pole is flush with the bottom of the annular sinking groove, so that the aluminum block can be prevented from being mounted reversely, and the thickness increase of the top cover plate assembly caused by mismatched mounting of the pole and the aluminum block can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a top cover assembly, a battery cell, and a battery pack. Background Technology

[0002] The top cover of a power battery typically includes an upper plastic layer, a light aluminum sheet, terminals, a lower plastic layer, and an aluminum block. The terminals pass through and connect the aluminum block, the light aluminum sheet, and the lower plastic layer, while the upper plastic layer wraps around the aluminum block. During the actual assembly of the top cover, especially the assembly of the aluminum block and the upper plastic layer, it is common to install the aluminum block backwards. This causes mismatch between the terminals and the aluminum block, affecting the welding between them, and also increases the overall thickness of the top cover.

[0003] Therefore, there is an urgent need to propose a top cover assembly, a battery cell, and a battery pack to solve the above problems. Utility Model Content

[0004] The first objective of this utility model is to provide a top cover plate assembly that can not only position and install aluminum blocks to improve assembly efficiency, but also prevent the aluminum blocks from being installed backwards, thereby avoiding an increase in the thickness of the top cover plate assembly due to mismatch between the pole and the aluminum blocks; and has high structural strength.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] Top cover assembly, including:

[0007] Top cover plate;

[0008] The plastic coating is located on the side of the top cover plate away from the battery cell. The side of the plastic coating away from the top cover plate has a receiving groove. The inner side wall of the receiving groove has a first chamfer and a second chamfer at two opposite corners.

[0009] An aluminum block has an annular groove on the surface of the aluminum block facing away from the top cover plate. The outer sidewall of the aluminum block has a third chamfer and a fourth chamfer at two opposite corners. The third chamfer is adapted to the first chamfer, and the fourth chamfer is adapted to the second chamfer. The aluminum block can be placed in the receiving groove. At least part of the sidewall of the aluminum block and the side near the top cover plate are wrapped with plastic. The electrode passes through the aluminum block, and the top surface of the electrode is flush with the bottom of the annular groove.

[0010] As an optional technical solution for the top cover assembly, the shape of the first chamfer is the same as the shape of the second chamfer; and / or,

[0011] The shape of the third chamfer is the same as the shape of the fourth chamfer.

[0012] As an optional technical solution for the top cover assembly, the first chamfer is triangular in shape; and / or,

[0013] The third chamfer is triangular in shape.

[0014] As an optional technical solution for the top cover plate assembly, the pole is riveted to the aluminum block.

[0015] As an optional technical solution for the top cover plate assembly, the top cover plate has a groove on the side opposite to the battery cell, and at least a portion of the plastic coating is engaged in the groove.

[0016] As an optional technical solution for the top cover plate assembly, the top cover plate assembly also includes a lower plastic, which is attached to the top cover plate on the side close to the battery cell.

[0017] As an optional technical solution for the top cover assembly, one of the lower plastic sheet and the top cover sheet is provided with a column, and the other of the two is provided with a slot, and the column is engaged in the slot.

[0018] As an optional technical solution for the top cover assembly, the column is located on the lower plastic.

[0019] The second objective of this invention is to provide a battery cell that has high assembly efficiency and high yield.

[0020] To achieve this objective, the present invention adopts the following technical solution:

[0021] A battery cell includes a battery cell, a housing, and the aforementioned top cover assembly, wherein the battery cell is located inside the housing, and the top cover assembly covers the opening of the housing.

[0022] The third objective of this invention is to provide a battery pack that has high assembly efficiency and a high yield rate.

[0023] To achieve this objective, the present invention adopts the following technical solution:

[0024] The battery pack includes multiple of the aforementioned battery cells.

[0025] The beneficial effects of this utility model are:

[0026] The top cover assembly provided by this utility model includes a top cover sheet, a plastic coating, and an aluminum block. The plastic coating has a receiving groove, and the inner sidewall of the receiving groove has a first chamfer and a second chamfer at two opposite corners, respectively. The outer sidewall of the aluminum block has a third chamfer and a fourth chamfer at two opposite corners, respectively. The third chamfer is adapted to the first chamfer, and the fourth chamfer is adapted to the second chamfer. The aluminum block can be placed in the receiving groove. At least part of the sidewall of the aluminum block and the side closest to the top cover sheet are wrapped with plastic coating, which insulates and isolates the aluminum block from the top cover sheet. Because the surface of the aluminum block has an annular groove, the electrode passes through the aluminum block, and the top surface of the electrode is flush with the bottom of the annular groove, reducing the thickness of the entire top cover assembly. Therefore, during the actual assembly of the plastic coating and the aluminum block, the third and fourth chamfers of the aluminum block are aligned with the first and second chamfers in the plastic coating receiving groove, respectively. This not only achieves the positioning and assembly of the aluminum block and the plastic coating, improving assembly efficiency, but also prevents the aluminum block from being installed backwards, thus avoiding an increase in the thickness of the top cover assembly due to mismatch between the pole post and the aluminum block. Furthermore, it increases the contact area between the plastic coating and the aluminum block, improving the connection strength and thus enhancing the structural strength of the top cover assembly. Attached Figure Description

[0027] Figure 1 This is an exploded view of the top cover plate assembly provided in this embodiment of the utility model;

[0028] Figure 2 This is a structural schematic diagram of the top cover plate assembly provided in an embodiment of the present utility model;

[0029] Figure 3 This is a schematic diagram of the plastic-encased structure in the top cover assembly provided in this embodiment of the utility model. Figure 1 ;

[0030] Figure 4 This is a schematic diagram of the structure of the aluminum block in the top cover plate assembly provided in this embodiment of the utility model;

[0031] Figure 5 This is a schematic diagram of the plastic-encased structure in the top cover assembly provided in this embodiment of the utility model. Figure 2 ;

[0032] Figure 6 This is a schematic diagram of the structure of the top cover plate in the top cover plate assembly provided in this utility model embodiment.

[0033] In the picture:

[0034] 100. Top cover plate; 110. Groove; 111. Mounting hole; 112. Fifth chamfer; 113. Sixth chamfer; 200. Plastic wrap; 210. First chamfer; 220. Second chamfer; 230. Annular boss; 240. Seventh chamfer; 250. Eighth chamfer; 300. Aluminum block; 310. Third chamfer; 320. Fourth chamfer; 400. Terminal post; 500. Lower plastic wrap. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0036] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between 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.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0039] The top cover plate assembly proposed in this embodiment can not only position and install the aluminum block 300, improving assembly efficiency, but also avoid installing the aluminum block 300 backwards, thereby avoiding the increase in the thickness of the top cover plate assembly due to the mismatch between the pole post 400 and the aluminum block 300; and it has high structural strength.

[0040] Specifically, such as Figures 1 to 4 As shown, the top cover assembly includes a top cover sheet 100, a plastic coating 200, and an aluminum block 300. The plastic coating 200 is located on the side of the top cover sheet 100 away from the battery cell. The side of the plastic coating 200 away from the top cover sheet 100 is provided with a receiving groove. The inner sidewall of the receiving groove is provided with a first chamfer 210 and a second chamfer 220 at two opposite corners. The aluminum block 300 has an annular groove on the side facing away from the top cover plate 100. The two opposite corners of the outer wall of the aluminum block 300 are respectively provided with a third chamfer 310 and a fourth chamfer 320. The third chamfer 310 is adapted to the first chamfer 210, and the fourth chamfer 320 is adapted to the second chamfer 220. The aluminum block 300 can be placed in the receiving groove. At least part of the side wall of the aluminum block 300 and the side near the top cover plate 100 are wrapped with plastic 200, and the pole post 400 passes through the aluminum block 300. The top surface of the pole post 400 is flush with the bottom of the annular groove.

[0041] Based on the above design, the plastic coating 200 is provided with a receiving groove, and the two opposite corners of the inner sidewall of the receiving groove are respectively provided with a first chamfer 210 and a second chamfer 220; the two opposite corners of the outer sidewall of the aluminum block 300 are respectively provided with a third chamfer 310 and a fourth chamfer 320, the third chamfer 310 is adapted to the first chamfer 210, and the fourth chamfer 320 is adapted to the second chamfer 220, so that the aluminum block 300 can be placed in the receiving groove. At least part of the sidewall of the aluminum block 300 and the side near the top cover plate 100 are wrapped with the plastic coating 200, which insulates and isolates the aluminum block 300 from the top cover plate 100; since the surface of the aluminum block 300 is provided with an annular groove, the pole post 400 passes through the aluminum block 300, and the top surface of the pole post 400 is flush with the bottom of the annular groove, reducing the thickness of the entire top cover plate assembly. During the actual assembly of the plastic-coated 200 and the aluminum block 300, the third chamfer 310 and the fourth chamfer 320 of the aluminum block 300 are respectively aligned with the first chamfer 210 and the second chamfer 220 in the receiving groove of the plastic-coated 200. This not only achieves the positioning assembly of the aluminum block 300 and the plastic-coated 200, but also avoids the aluminum block 300 being installed backwards. This prevents an increase in the thickness of the top cover assembly due to mismatch between the pole post 400 and the aluminum block 300. At the same time, it increases the contact area between the plastic-coated 200 and the aluminum block 300, improves the connection strength between the plastic-coated 200 and the aluminum block 300, and thus improves the structural strength of the top cover assembly.

[0042] It should be noted that the top cover 100 is made of plain aluminum material, and the plastic cover 200 is made of insulating plastic material.

[0043] In some embodiments, the first chamfer 210 has the same shape as the second chamfer 220, while the third chamfer 310 and the fourth chamfer 320 have different shapes. In other embodiments, the first chamfer 210 has different shapes than the second chamfer 220, while the third chamfer 310 and the fourth chamfer 320 have the same shape. In still other embodiments, the first chamfer 210 has the same shape as the second chamfer 220, and the third chamfer 310 and the fourth chamfer 320 also have the same shape.

[0044] For example, the shape of the first chamfer 210 is a triangle, an arc, etc.; the shape of the third chamfer 310 can also be a triangle, an arc, etc.

[0045] Optionally, such as Figure 5 and Figure 6 The top cover 100 has a groove 110 on the side away from the battery cell, and at least part of the plastic coating 200 is engaged in the groove 110 to improve the connection strength between the plastic coating 200 and the top cover 100.

[0046] Furthermore, the bottom of the groove 110 of the top cover plate 100 is provided with a mounting hole 111, and the plastic cover 200 is provided with an annular boss 230 on the side near the top cover plate 100. The annular boss 230 passes through the mounting hole 111, that is, the annular boss 230 is sandwiched between the side wall of the pole post 400 and the inner wall of the mounting hole 111, so as to insulate and isolate the pole post 400 and the top cover plate 100.

[0047] In order to achieve the positioning and assembly of the plastic cover 200 and the top cover 100, in this embodiment, the two opposite corners of the inner wall of the groove 110 are respectively provided with a fifth chamfer 112 and a sixth chamfer 113, and the two opposite corners of the outer wall of the plastic cover 200 are respectively provided with a seventh chamfer 240 and an eighth chamfer 250. The seventh chamfer 240 is adapted to the fifth chamfer 112, and the eighth chamfer 250 is adapted to the sixth chamfer 113.

[0048] Optionally, the top cover assembly also includes a lower plastic 500, which is attached to the top cover plate 100 on the side near the battery cell to insulate and isolate the battery cell from the top cover plate 100.

[0049] Furthermore, one of the lower plastic sheet 500 and the top cover sheet 100 is provided with a post (not shown in the figure), and the other of the two is provided with a slot (not shown in the figure). The post is engaged in the slot to improve the connection strength between the top cover sheet 100 and the lower plastic sheet 500.

[0050] In this embodiment, the support column is located on the lower plastic 500, which is made of plastic material, making it lighter. The support column is located on the lower plastic 500 compared to the top cover plate 100, making the overall weight of the top cover plate assembly lighter.

[0051] Optionally, for ease of connection and high connection strength, the pole post 400 and the aluminum block 300 are riveted together.

[0052] The top cover assembly also includes a snap-on plate (not shown in the figure). The snap-on plate is attached to the side of the lower plastic 500 near the battery cell. The terminal post 400 is sequentially connected to the aluminum block 300, the top cover plate 100, the lower plastic 500, and the snap-on plate. The surface of the terminal post 400 and the snap-on plate near the battery cell are flush. The snap-on plate can increase the fixation of the terminal post 400.

[0053] In this embodiment, the top cover plate assembly also includes a sealing ring (not shown in the figure), which is sleeved on the outer wall of the pole post 400 to insulate and seal the pole post 400 and the top cover plate 100.

[0054] In this embodiment, the terminal 400 is the positive terminal. Of course, the top cover plate assembly may also include a negative terminal. The assembly methods of the negative terminal and the positive terminal may be the same or different, which will not be elaborated here.

[0055] This embodiment also provides a battery cell that has high assembly efficiency and high yield.

[0056] Specifically, the battery cell includes a battery cell, a casing, and the aforementioned top cover assembly. The battery cell is located inside the casing, and the top cover assembly covers the opening of the casing. Since the aluminum block 300 can be installed backwards during the assembly of the top cover assembly, the thickness of the top cover assembly can be avoided due to the mismatch between the terminal post 400 and the aluminum block 300, resulting in high assembly efficiency and high assembly yield.

[0057] This embodiment also provides a battery pack, which has high battery cell assembly efficiency and high yield.

[0058] Specifically, the battery pack includes multiple of the aforementioned battery cells. Due to the high assembly efficiency and high yield of the battery cells, the battery pack also has high assembly efficiency and high yield.

[0059] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A top cover assembly, characterized in that, include: Top cover plate (100); Plastic coating (200) is located on the side of the top cover (100) away from the battery cell. The side of the plastic coating (200) away from the top cover (100) is provided with a receiving groove. The inner sidewall of the receiving groove is provided with a first chamfer (210) and a second chamfer (220) at two opposite corners. An aluminum block (300) has an annular groove on the side of its surface facing away from the top cover plate (100). The outer sidewall of the aluminum block (300) has a third chamfer (310) and a fourth chamfer (320) at two opposite corners. The third chamfer (310) is adapted to the first chamfer (210), and the fourth chamfer (320) is adapted to the second chamfer (220). The aluminum block (300) can be placed in the receiving groove. At least part of the sidewall of the aluminum block (300) and the side near the top cover plate (100) are wrapped with plastic (200). The pole post (400) passes through the aluminum block (300), and the top surface of the pole post (400) is flush with the bottom of the annular groove.

2. The top cover assembly according to claim 1, characterized in that, The shape of the first chamfer (210) is the same as the shape of the second chamfer (220); and / or, The shape of the third chamfer (310) is the same as the shape of the fourth chamfer (320).

3. The top cover assembly according to claim 2, characterized in that, The first chamfer (210) is triangular in shape; and / or, The third chamfer (310) is triangular in shape.

4. The top cover assembly according to claim 1, characterized in that, The pole (400) is riveted to the aluminum block (300).

5. The top cover assembly according to claim 1, characterized in that, The top cover (100) has a groove (110) on the side opposite to the battery cell, and at least a portion of the plastic coating (200) is engaged in the groove (110).

6. The top cover assembly according to claim 1, characterized in that, The top cover assembly also includes a lower plastic (500), which is attached to the top cover sheet (100) on the side close to the battery cell.

7. The top cover assembly according to claim 6, characterized in that, One of the lower plastic sheet (500) and the top cover sheet (100) is provided with a column, and the other of the two is provided with a slot, and the column is engaged in the slot.

8. The top cover assembly according to claim 7, characterized in that, The column is located on the lower plastic (500).

9. A single battery cell, characterized in that, It includes a battery cell, a housing, and a top cover assembly as described in any one of claims 1-8, wherein the battery cell is located inside the housing, and the top cover assembly covers the opening of the housing.

10. A battery pack, characterized in that, It includes multiple battery cells as described in claim 9.

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