Adapter bracket and battery cell assembly

Abstract

The utility model discloses a kind of switching support and battery cell assembly, the switching support, including sheet part and two thickening parts, sheet part is used to be welded in the pole of battery cell, two thickening parts are connected in the two opposite sides of sheet part respectively, the thickness of thickening part is greater than the thickness of sheet part, and the first end of thickening part protrudes from first board surface, the end surface of first end is equipped with connecting hole, connecting hole is used to connect outside fastener, so that for the battery cell welded with switching support, user only needs to connect the external electrical connection structure by outside fastener and be connected in thickening part, it can be realized to connect battery cell into the external circuit connected by electrical connection structure, the switching support has better overcurrent capacity, and the connection stability of fastener is better, and the connection stability with pole is also better.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, and in particular to an adapter bracket and a battery cell assembly. Background Technology

[0002] In related technologies, there is a type of battery cell assembly in which an adapter bracket is welded to the terminal of the battery cell, so that the user can fasten an external circuit to the adapter bracket using fasteners. Compared with welding the external circuit to the terminal of the battery cell, the connection operation of this battery cell assembly to the external circuit is simpler.

[0003] However, existing adapter brackets have problems such as poor current carrying capacity, poor connection stability with fasteners, and the connection between the adapter bracket and the pole is prone to breakage during the process of fastening the fasteners to the adapter bracket. Utility Model Content

[0004] One objective of this invention is to provide an adapter bracket that has good current carrying capacity, good connection stability with fasteners, and good connection stability with pole posts.

[0005] Another objective of this invention is to provide a battery cell assembly that can be assembled without welding.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] Firstly, an adapter bracket is provided, comprising:

[0008] Thin plate portion, said thin plate portion for welding to the electrode post of the battery cell; and,

[0009] Two thickened portions are respectively connected to two opposite sides of the thin plate portion. The thickness of the thickened portion is greater than the thickness of the thin plate portion, and the first end of the thickened portion protrudes from the first plate surface of the thin plate portion. The end face of the first end is provided with a connecting hole for external fastener connection.

[0010] As a preferred embodiment of the aforementioned adapter bracket, the thin plate portion further includes a welding area, the area S of which satisfies: S≥78.5mm² 2 .

[0011] As a preferred technical solution for the adapter bracket, the welding area is annular, with an inner diameter of R1 and an outer diameter of R2, where R2 - R1 ≥ 1.3 mm.

[0012] As a preferred technical solution for the adapter bracket, the thin plate portion has a thickness d1, 1.5mm≤d1≤4mm; and / or,

[0013] The thickened portion has a thickness d3, 10mm≤d3≤30mm; and / or,

[0014] The minimum distance between the connecting hole and the peripheral side of the thickened part is L, where L ≥ 1.5 mm.

[0015] As a preferred technical solution for the adapter bracket, the first plate surface is provided with a thinning blind groove, and the bottom of the thinning blind groove is used to weld to the electrode post of the battery cell.

[0016] As a preferred technical solution for the adapter bracket, the thinned blind groove has a depth d2, 0.5mm≤d2≤2mm; and / or,

[0017] The inscribed circle diameter of the thinning blind groove is R3, and the end face of the pole used for welding to the bottom of the thinning blind groove is a circular surface with a diameter of R4, where R3 ≤ R4; and / or,

[0018] The bottom surface of the thinned blind slot is also provided with a through-hole for alignment, and the electrode post of the battery cell is provided with an alignment structure. The diameter of the alignment through-hole is larger than the outer circle diameter of the alignment structure.

[0019] As a preferred technical solution for the adapter bracket, the two thickened parts are spaced apart.

[0020] As a preferred technical solution for the adapter bracket, two thickened portions are located on both sides of the thin plate portion along a first direction, and along a second direction, the two sides of the thickened portions are flush with the two sides of the thin plate portion, wherein the second direction is perpendicular to the first direction and the thickness direction of the thin plate portion.

[0021] As a preferred embodiment of the aforementioned adapter bracket, the thin plate portion has a second plate surface opposite to the first plate surface, and the thickened portion has a second end opposite to the first end, the end face of the second end being flush with the second plate surface; and / or,

[0022] The two thickened portions are respectively connected to both sides of the thin plate portion along the first direction. The thickened portion has a first side facing away from the other thickened portion along the first direction. The thickened portion also has two opposing second side surfaces along the second direction. The second side surfaces and the first side surfaces are both planar. The second side surfaces and the first side surfaces are connected by a connecting arc surface. The second direction is perpendicular to the first direction and the thickness direction of the thin plate portion.

[0023] In a second aspect, a battery cell assembly is provided, including a battery cell and two adapter brackets as described in the first aspect above, wherein the thin plate portions of the two adapter brackets are respectively welded to two terminals of the battery cell.

[0024] As a preferred technical solution for the aforementioned battery cell assembly, the terminal post and the adapter bracket are made of the same material.

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

[0026] By designing an adapter bracket, the thin plate portion of the adapter bracket can be welded to the terminal post of the battery cell, and the connection hole of the thickened portion can be used for external fastener connection. Thus, for battery cells with the adapter bracket welded on, users only need to fasten the external electrical connection structure to the thickened portion with external fasteners to connect the battery cell to the external circuit connected to the electrical connection structure. In other words, battery cell assembly can be achieved without welding the battery cell.

[0027] Furthermore, by making the thickness of the thickened portion greater than that of the thin plate portion, the thickened portion has a stronger current carrying capacity, and at the same time, it can provide a larger space for the connection hole. This results in a larger effective connection area between the connection hole and the fastener, so that the fastener can more firmly fasten the external electrical connection structure to the thickened portion through the connection hole.

[0028] By placing the two thickened sections on opposite sides of the thin plate section, the torque on the connection between the thin plate section and the battery cell's terminal post is more balanced when the user secures the external electrical connection structure to the two thickened sections with external fasteners. This reduces the possibility of the connection between the thin plate section and the battery cell's terminal post becoming loose during the process. In other words, the connection stability between the adapter bracket and the battery cell is better during use. Attached Figure Description

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0030] Figure 1 This is a three-dimensional structural diagram of the battery cell assembly described in the embodiment.

[0031] Figure 2 for Figure 1 Enlarged schematic diagram of point M in the middle.

[0032] Figure 3 This is an exploded view of the battery cell assembly described in the embodiment.

[0033] Figure 4 This is a three-dimensional structural diagram of the adapter bracket described in the embodiment at one angle.

[0034] Figure 5 This is a top view of the adapter bracket described in the embodiment.

[0035] Figure 6 for Figure 4The diagram shows a cross-sectional view of the adapter bracket.

[0036] Figure 7 This is a three-dimensional structural diagram of the adapter bracket described in the embodiment from another angle.

[0037] In the picture:

[0038] 1. Battery cell; 10. Terminal post; 100. Alignment structure;

[0039] 2. Adapter bracket; 20. Thin plate section; 201. First plate surface; 2010. Thinning blind groove; 2010a. Groove bottom surface; 2011. Alignment through hole; 202. Second plate surface; 203. Welding area; 21. Thickened section; 211. First end; 2110. Connecting hole; 212. Second end; 21a. First side surface; 21b. Second side surface; 21c. Connecting arc surface; 22. Flow space. Detailed Implementation

[0040] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0041] 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.

[0042] 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.

[0043] like Figures 1 to 3 As shown, this utility model provides a battery cell assembly, including a battery cell 1 and an adapter bracket 2. Specifically, please refer to... Figure 4 As shown, the adapter bracket 2 provided by this utility model includes a thin plate portion 20 and two thickened portions 21. The thin plate portion 20 is used to weld to the pole post 10 of the battery cell 1. The two thickened portions 21 are respectively connected to two opposite sides of the thin plate portion 20. The thickness of the thickened portion 21 is greater than the thickness of the thin plate portion 20, and the first end 211 of the thickened portion 21 protrudes from the first plate surface 201. The end face of the first end 211 is provided with a connecting hole 2110, which is used for external fastener connection.

[0044] By designing an adapter bracket 2, the thin plate portion 20 of the adapter bracket 2 can be welded to the terminal post 10 of the battery cell 1, and the connection hole 2110 of the thickened portion 21 can be connected to external fasteners. Thus, for the battery cell 1 with the adapter bracket 2 welded on, the user only needs to fasten the external electrical connection structure to the thickened portion 21 with external fasteners to connect the battery cell 1 to the external circuit connected to the electrical connection structure. In other words, the battery cell 1 can be assembled without re-welding the battery cell 1 with the adapter bracket 2 welded on.

[0045] Furthermore, by making the thickness of the thickened portion 21 greater than the thickness of the thin plate portion 20, the thickened portion 21 has a stronger current carrying capacity, and on the other hand, it can provide a larger setting space for the connecting hole 2110. As a result, the effective connection area between the connecting hole 2110 and the fastener is larger, so that the fastener can more firmly fasten the external electrical connection structure to the thickened portion 21 through the connecting hole 2110.

[0046] By positioning the two thickened portions 21 on opposite sides of the thin plate portion 20, the torque on the connection between the thin plate portion 20 and the terminal post of the battery cell 1 is more balanced when the user fastens the external electrical connection structure to the two thickened portions 21 with external fasteners. This reduces the possibility of the connection between the thin plate portion 20 and the terminal post of the battery cell 1 becoming loose during the process. In other words, the connection stability between the adapter bracket 2 and the battery cell 1 is better during use.

[0047] Optionally, the battery cell assembly includes a battery cell 1 and two adapter brackets 2. The thin plate portion 20 of the two adapter brackets 2 is respectively welded to the two terminals 10 of the battery cell 1. By welding the adapter brackets 2 to the two terminals 10 of the battery cell 1, the user only needs to fasten the external electrical connection structure to the thickened portion 21 with external fasteners to connect the battery cell 1 to the external circuit connected by the electrical connection structure. In other words, the battery cell assembly can be assembled without welding the battery cell assembly provided in this embodiment.

[0048] Please combine Figure 5 As shown, optionally, the thin plate portion 20 also has a welding area 203. The welding area 203 is the area formed on the thin plate portion 20 that is directly welded to the terminal post 10 of the battery cell 1 after the thin plate portion 20 is welded to it. It can be understood that the area of ​​the welding area 203 is the current-passing area between the adapter bracket 2 and the terminal post 10. Figure 5 The boundary of the welding area 203 is shown by dashed lines.

[0049] Under normal circumstances, the current in the circuit connected to cell 1 is approximately 314A. In other words, the connection point between adapter bracket 2 and cell 1 (i.e., welding area 203) needs to have a current carrying capacity of 314A. To achieve this, the current carrying area should typically be at least 78.5mm². 2 Therefore, optionally, the area S of the welding region 203 can satisfy: S≥78.5mm 2 For example, the area S of the welding region 203 can be 78.5 mm. 2 79mm 2 80mm 2 81mm 2 82mm 2 85mm 2 90mm 2 95mm 2 Or 100mm 2 wait.

[0050] The welding area 203 is annular, with an inner diameter of R1 and an outer diameter of R2. To improve the welding stability between the welding area 203 and the pole post 10, the width R2-R1 of the welding area 203 should not be too small. Therefore, the difference between the outer diameter R2 and the inner diameter R1 of the welding area 203 can optionally satisfy: R2-R1 ≥ 1.3 mm. For example, the difference between the outer diameter R2 and the inner diameter R1 of the welding area 203, R2-R1, can be: 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, or 2.8 mm, etc.

[0051] Understandably, at this point, the area S of the welding region 203 is equal to π(R²). 2 -R1 2 ) / 4.

[0052] Optionally, the first plate surface 201 of the thin plate portion 20 is provided with a thinning blind groove 2010. The bottom of the thinning blind groove 2010 is used to weld to the electrode post 10 of the battery cell 1. By providing the thinning blind groove 2010, the bottom of the thinning blind groove 2010 can be made thinner, thereby making the bottom thickness of the thinning blind groove 2010 suitable for welding to the electrode post 10 of the battery cell 1 by laser welding, and the welding quality is better.

[0053] Furthermore, by placing the thinning blind groove 2010 on the thin plate portion 20, on the one hand, the thickness of the thin plate portion 20 can be greater than the bottom thickness of the thinning blind groove 2010, so that the thin plate portion 20 has a stronger flow capacity. On the other hand, the thin plate portion 20 itself is thinner, so that the bottom thickness of the thinning blind groove 2010 does not need to be too deep to match the welding requirements. This is beneficial to the fact that during the welding process, the generated fumes can be quickly discharged to the external environment through the flow space 22 formed between the thinning blind groove 2010 and the thin plate portion 20 and the thickened portion 21, and to prevent the fumes from staying in the thinning blind groove 2010 and forming marks on the bottom and walls of the thinning blind groove 2010, resulting in poor appearance.

[0054] When the thin plate portion 20 also has a welding area 203 as described in the aforementioned technical solution, it can be understood that the welding area 203 is located within the bottom surface 2010a of the thinning blind groove 2010. The welding area 203 is the area formed at the bottom of the thinning blind groove 2010 after the bottom of the thinning blind groove 2010 is welded to the electrode post 10 of the battery cell 1, and is directly welded to the electrode post 10 of the battery cell 1.

[0055] The inner circle diameter of the thinning blind groove 2010 is R3. The end face of the pole post 10, which is used for welding to the bottom of the thinning blind groove 2010, is a circular surface, and the diameter of the end face of the pole post 10 is R4 (e.g., Figure 3 As shown, in order for the welding area 203 to be directly welded to the end face of the pole post 10, the projection of the bottom of the thinned blind groove 2010 on the cell 1 needs to be completely located within the end face of the pole post 10. Based on this, optionally, the inner circle diameter R3 of the thinned blind groove 2010 and the diameter R4 of the end face of the pole post 10 can satisfy: R3≤R4.

[0056] In addition, in order to make the welding area 203 located within the bottom surface 2010a of the thinning blind groove 2010, optionally, the inscribed circle diameter R3 of the bottom surface 2010a and the outer diameter R2 of the welding area 203 can satisfy: R2≤R3.

[0057] Optionally, the connecting hole 2110 may be a threaded hole, and the external fastener may be a threaded component. The external fastener may be threadedly fastened to the connecting hole 2110, or the external fastener and the connecting hole 2110 may be interference-fitted.

[0058] The minimum interval between the connecting hole 2110 and the peripheral side surface of the thickened portion 21 is L. In order to improve the structural strength of the thickened portion 21 around the connecting hole 2110 and prevent external fasteners from falling off the thickened portion 21, and at the same time to allow for a certain distance from the hole to the edge when opening a hole in the thickened portion 21, the minimum interval L cannot be too small. Based on this, the minimum interval L between the connecting hole 2110 and the peripheral side surface of the thickened portion 21 can optionally satisfy: L≥1.5mm. For example, the minimum interval L can be 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, 2.1mm, 2.2mm or 2.3mm, etc.

[0059] To enable the external fastener to handle a current of 314A, threaded parts with an M6 or larger thread are generally selected as the external fastener. In other words, the diameter of the threaded connection portion of the external fastener can usually be greater than or equal to 6mm. For example, the diameter of the threaded connection portion of the external fastener can be 6mm, 7mm, 8mm, 9mm, 10mm or 11mm, etc.

[0060] Please combine Figure 6 As shown, the thin plate portion 20 has a thickness d1. The larger the thickness d1, the deeper the depth of the thinning blind groove 2010 will be in order to adapt the thickness of the bottom of the thinning blind groove 2010 to the welding requirements. This makes it more difficult for the fumes generated during the welding process to be quickly discharged into the thinning blind groove 2010, and thus makes it easier for the fumes to form marks on the bottom and walls of the thinning blind groove 2010, resulting in poor appearance. On the other hand, the smaller the thickness d1, the weaker the structural strength of the thin plate portion 20 and the worse the flow capacity. Therefore, the thickness d1 of the thin plate portion 20 cannot be too large or too small. Based on this, the thickness d1 of the thin plate portion 20 can optionally satisfy: 1.5mm≤d1≤4mm. For example, the thickness d1 can be 1.5mm, 1.7mm, 2mm, 2.2mm, 2.5mm, 2.7mm, 3mm, 3.2mm, 3.5mm, 3.7mm or 4mm, etc.

[0061] The thinning blind groove 2010 has a depth d2. The larger the depth d2, the smaller the bottom thickness of the thinning blind groove 2010, and the better the weld stability between the bottom of the thinning blind groove 2010 and the electrode post 10 of the battery cell 1 via laser welding. However, the fumes generated during the welding process are less likely to be quickly discharged into the thinning blind groove 2010, which in turn makes it easier for the fumes to leave marks on the bottom and walls of the thinning blind groove 2010, resulting in poor appearance. Conversely, the smaller the depth d2, the easier it is for the fumes generated during the welding process to be discharged into the thinning blind groove. Within 2010, however, the greater the thickness of the bottom of the thinning blind groove 2010, the worse the welding stability of the bottom of the thinning blind groove 2010 and the electrode post 10 of the cell 1 by laser welding phase. Therefore, the thickness d2 of the thinning blind groove 2010 cannot be too large or too small. Based on this, the thickness d2 of the thinning blind groove 2010 can optionally satisfy: 0.5mm≤d2≤2mm. For example, the thickness d2 can be 0.5mm, 0.7mm, 1mm, 1.2mm, 1.5mm, 1.7mm or 2mm, etc.

[0062] Optionally, the bottom surface 2010a of the thinning blind groove 2010 is also provided with a through alignment hole 2011. The electrode post 10 of the battery cell 1 is provided with an alignment structure 100. The diameter of the alignment hole 2011 is larger than the outer diameter of the alignment structure 100. Thus, when the adapter bracket 2 is placed on the battery cell 1 with the electrode post 10 roughly aligned, the alignment structure 100 can be visually observed through the alignment hole 2011 on the side facing the first plate surface 201. In other words, the alignment structure 100 can be exposed through the alignment hole 2011. Before the welding process, the relative position of the alignment structure 100 and the alignment hole 2011 can be obtained by the vision sensor on the manufacturing equipment. Then, the adapter bracket 2 and the battery cell 1 can be moved relative to each other by the moving mechanism on the manufacturing equipment, thereby achieving precise alignment of the adapter bracket 2 and the battery cell 1.

[0063] The alignment structure 100 may include, but is not limited to, holes, slots, or other structures that can form a boundary profile in appearance.

[0064] At this time, in order to make the welding area 203 located within the bottom surface 2010a of the thinning blind groove 2010, the diameter of the alignment through hole 2011 may optionally be less than or equal to the outer inner diameter R1 of the welding area 203.

[0065] The thickened portion 21 has a thickness d3. The larger the thickness d3, the larger the space that can be set in the connecting hole 2110, and the larger the effective connection area that the connecting hole 2110 can provide for the external fastener. Thus, the fastener can more firmly fasten the external electrical connection structure to the thickened portion 21 through the connecting hole 2110. However, at this time, the space occupied by the adapter bracket 2 is also larger. Therefore, the thickness d3 can be large but not too large. Based on this, the thickness d3 of the thickened portion 21 can optionally satisfy: 10mm≤d3≤30mm. For example, the thickness d3 can be 10mm, 12mm, 14mm, 15mm, 16mm, 18mm, 20mm, 22mm, 24mm, 25mm, 26mm, 28mm or 30mm, etc.

[0066] Optionally, the two thickened portions 21 are spaced apart, so that the flow space 22 formed between the thin plate portion 20 and the thickened portion 21 can be directly connected to the external space through the gap between the two thickened portions 21. On the one hand, this can make the air circulation efficiency in the flow space 22 higher, which is conducive to the faster discharge of flue gas through the flow space 22. On the other hand, since the flow space 22 is formed in the shape of penetrating the adapter bracket 2 on both sides, when manufacturing the adapter bracket 2, the structure of the flow space 22 can be quickly cut out of the block raw material with a few cuts or even one cut along a straight trajectory using a cutting tool.

[0067] Optionally, the two thickened portions 21 are located on both sides of the thin plate portion 20 along the first direction S1 and along the second direction S2, respectively. The two sides of the thickened portions 21 are flush with the two sides of the thin plate portion 20. The second direction S2 is perpendicular to the first direction S1 and the thickness direction T of the thin plate portion 20. As a result, the outer peripheral surface of the adapter bracket 2 is smoother, which can reduce the sharp corner structure at the outer periphery of the adapter bracket 2 and reduce the possibility that the outer peripheral structure of the adapter bracket 2 may cause injury to other external parts or the hands of operators.

[0068] In other embodiments, the two thickened portions 21 are respectively connected to both sides of the thin plate portion 20 along the first direction S1, and the two thickened portions 21 may also be connected to at least one side of the thin plate portion 20 along the second direction S2.

[0069] When the two thickened portions 21 are respectively connected to the two sides of the thin plate portion 20 along the first direction S1, optionally, the thickened portion 21 has a first side surface 21a that is opposite to the other thickened portion 21 along the first direction S1, and the thickened portion 21 also has two opposing second side surfaces 21b along the second direction S2. The second side surface 21b and the first side surface 21a are both planar, and the second side surface 21b and the first side surface 21a are connected by a connecting arc surface 21c, thereby further reducing the sharp corner structure at the outer periphery of the adapter bracket 2 and reducing the possibility that the outer periphery structure of the adapter bracket 2 may cause injury to other external parts or the hands of operators.

[0070] Please combine Figure 7 As shown, optionally, the thin plate portion 20 has a second plate surface 202 opposite to the first plate surface 201, and the thickened portion 21 has a second end 212 opposite to the first end 211. The end face of the second end 212 is flush with the second plate surface 202, so that the surface of the adapter bracket 2 facing the battery cell 1 is flat, which can prevent the surface structure of the adapter bracket 2 from puncturing the battery cell 1 and improve the safety of the adapter bracket 2 in use.

[0071] Optionally, the pole post 10 and the adapter bracket 2 are made of the same material, so that the welding quality of the pole post 10 and the adapter bracket 2 can be higher and the welding stability of the pole post 10 and the adapter bracket 2 can be better.

[0072] In other embodiments, the pole 10 and the adapter bracket 2 may be made of different materials.

[0073] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings, and are used only for ease of description and simplification of operation. They 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 of this utility model. Furthermore, the terms "first" and "second" are merely used for distinction in description and have no special meaning.

[0074] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0075] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0076] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. An adapter bracket, characterized in that, include: Thin plate portion (20), the thin plate portion (20) is used for welding to the electrode post (10) of the battery cell (1); as well as, Two thickened portions (21) are respectively connected to two opposite sides of the thin plate portion (20). The thickness of the thickened portion (21) is greater than the thickness of the thin plate portion (20). The first end (211) of the thickened portion (21) protrudes from the first plate surface (201) of the thin plate portion (20). The end face of the first end (211) is provided with a connecting hole (2110) for connecting external fasteners.

2. The adapter bracket according to claim 1, characterized in that, The thin plate portion (20) also has a welding area (203), the area S of which satisfies: S≥78.5mm 2 .

3. The adapter bracket according to claim 2, characterized in that, The welding area (203) is annular, with an inner diameter of R1 and an outer diameter of R2, where R2 - R1 ≥ 1.3 mm.

4. The adapter bracket according to claim 1, characterized in that, The thin plate portion (20) has a thickness d1, 1.5 mm ≤ d1 ≤ 4 mm; and / or, The thickened portion (21) has a thickness d3, 10mm≤d3≤30mm; and / or, The minimum distance between the connecting hole (2110) and the peripheral side surface of the thickened part (21) is L, where L ≥ 1.5 mm.

5. The adapter bracket according to any one of claims 1-4, characterized in that, The first plate surface (201) is provided with a thinning blind groove (2010), and the bottom of the thinning blind groove (2010) is used to weld to the electrode post (10) of the battery cell (1).

6. The adapter bracket according to claim 5, characterized in that, The thinning blind groove (2010) has a depth d2, 0.5 mm ≤ d2 ≤ 2 mm; and / or, The inscribed circle diameter of the thinning blind groove (2010) is R3, the end face of the pole post (10) used for welding to the bottom of the thinning blind groove (2010) is a circular surface, and the diameter of the end face of the pole post (10) is R4, where R3 ≤ R4; and / or, The bottom surface (2010a) of the thinning blind groove (2010) is also provided with a through alignment hole (2011), and the electrode post (10) of the battery cell (1) is provided with an alignment structure (100), and the diameter of the alignment hole (2011) is larger than the outer circle diameter of the alignment structure (100).

7. The adapter bracket according to any one of claims 1-4, characterized in that, The two thickened portions (21) are spaced apart.

8. The adapter bracket according to claim 7, characterized in that, The two thickened portions (21) are located on both sides of the thin plate portion (20) along the first direction. Along the second direction, the two sides of the thickened portions (21) are flush with the two sides of the thin plate portion (20). The second direction is perpendicular to the first direction and the thickness direction of the thin plate portion (20).

9. The adapter bracket according to any one of claims 1-4, characterized in that, The thin plate portion (20) has a second plate surface (20) opposite to the first plate surface (201), and the thickened portion (21) has a second end (212) opposite to the first end (211), the end face of the second end (212) being flush with the second plate surface (20); and / or, Two thickened portions (21) are respectively connected to the two sides of the thin plate portion (20) along a first direction. Each thickened portion (21) has a first side surface (21a) that is opposite to the other thickened portion (21) along the first direction. Each thickened portion (21) also has two opposing second side surfaces (21b) along a second direction. Both the second side surface (21b) and the first side surface (21a) are planar. The second side surface (21b) and the first side surface (21a) are connected by a connecting arc surface (21c). The second direction is perpendicular to the first direction and the thickness direction of the thin plate portion (20).

10. A battery cell assembly, characterized in that, It includes a battery cell (1) and two adapter brackets (2) as described in any one of claims 1-9, wherein the thin plate portion (20) of the two adapter brackets (2) is respectively welded to the two terminals (10) of the battery cell (1).

11. The cell assembly according to claim 10, characterized in that, The pole (10) and the adapter bracket (2) are made of the same material.

Images