A cover plate assembly and a battery

Abstract

The present application provides a cover plate assembly and a battery, which relate to the field of battery manufacturing technology. The cover plate assembly includes a substrate, a pole and a connecting piece; the pole is inserted through the substrate and fixedly connected to the substrate; a welding groove is provided at one end of the pole; a welding portion is provided on the inner wall of the welding groove along a first direction; the connecting piece is provided at one end of the pole away from the welding groove and corresponds to the welding portion; the welding portion can be fixedly connected to the connecting piece when it is melted. The battery includes a cover plate assembly. The cover plate assembly of the present application, by providing a welding groove at one end of the pole, the welding portion on the inner wall of the welding groove can be fixedly connected to the connecting piece when it is melted; the welding groove can prevent the welding slag generated when the welding portion is melted from falling.

Description

Technical Field

[0001] The present application relates to the technical field of battery manufacturing, and in particular to a cover plate assembly and a battery. Background Art

[0002] In the field of battery manufacturing, the battery cell is connected to the pole on the substrate through a connecting piece. The end of the connecting piece away from the battery cell is usually fixedly connected to the pole by welding; because the welding of the end of the connecting piece away from the battery cell to the pole occurs on the side of the substrate close to the battery cell, there is a risk that the welding slag generated during welding will fall onto the battery cell, thereby affecting the safety of the battery cell. Utility Model Content

[0003] In order to overcome the deficiencies in the prior art, the present application provides a cover assembly and a battery.

[0004] This application provides the following technical solutions:

[0005] In a first aspect, the present application provides a cover plate assembly, comprising:

[0006] substrate;

[0007] A pole, the pole is passed through the substrate and fixedly connected to the substrate; a welding groove is formed at one end of the pole; a welding portion is formed on the inner wall of the welding groove along the first direction;

[0008] A connecting piece, which is arranged at one end of the pole away from the welding groove and corresponds to the welding portion;

[0009] Wherein, the welding portion can be fixedly connected to the connecting piece when melted.

[0010] In a possible embodiment, the pole includes a connected column and a base; the column is passed through the substrate and fixedly connected to the substrate; the side of the base away from the column is fixedly connected to the connecting piece; the welding groove is opened at one end of the column away from the base.

[0011] In a possible embodiment, the cover plate assembly also includes an insulating plate; the insulating plate is connected to one side of the substrate; the column passes through the substrate and the insulating plate; an assembly groove is formed on a side of the insulating plate away from the substrate; and the base is disposed in the assembly groove.

[0012] In a possible implementation manner, a positioning block is provided on a side of the insulating plate away from the base; a positioning groove is provided on the base plate; and the positioning block is disposed in the positioning groove.

[0013] In a possible implementation manner, the cover plate assembly further includes a cover cap; the cover cap is sealed at the opening of the welding groove.

[0014] In a possible implementation manner, the cover plate assembly further includes a fixing member; the fixing member is disposed on the base plate; the fixing member is sleeved on one end of the pole close to the welding groove and is fixedly connected to the pole.

[0015] In a possible implementation manner, the cover plate assembly further includes an insulating member; the insulating member is disposed on the substrate; a mounting groove is formed on the insulating member; and the fixing member is disposed in the mounting groove.

[0016] In a possible implementation manner, the cover plate assembly further includes a seal; the seal is disposed between the substrate and the pole.

[0017] In the second aspect, the present application also provides a battery, comprising a battery cell, a pole ear and the above-mentioned cover plate assembly; one end of the pole ear is fixedly connected to the battery cell; and one end of the pole ear away from the battery cell is fixedly connected to a side of the connecting plate away from the substrate.

[0018] In a possible implementation manner, one end of the electrode tab away from the connecting sheet is vertically fixed to the battery core.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The cover plate assembly provided by the present application is provided with a welding groove at one end of the pole; a welding portion is provided on the inner wall of the welding groove along the first direction; and the welding portion corresponds to a connecting piece provided at one end of the pole away from the welding groove. By heating the welding portion, the welding portion in a molten state can be fixedly connected to the connecting piece, so that the pole is fixedly connected to the connecting piece, and then the substrate fixedly connected to the pole is connected to the connecting piece. The welding groove can prevent the welding slag generated when the welding portion is melted from falling.

[0021] In order to make the above-mentioned objects, features and advantages of the present application more obvious and understandable, preferred embodiments are given below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 An exploded schematic diagram of a cover plate assembly according to an embodiment of the present application is shown;

[0024] Figure 2An internal schematic diagram of a cover plate assembly according to an embodiment of the present application is shown;

[0025] Figure 3 A schematic diagram of the three-dimensional structure of a cover plate assembly according to an embodiment of the present application is shown;

[0026] Figure 4 A schematic diagram of the three-dimensional structure of a pole according to an embodiment of the present application is shown;

[0027] Figure 5 A schematic diagram of the three-dimensional structure of a substrate according to an embodiment of the present application is shown;

[0028] Figure 6 A schematic diagram of the three-dimensional structure of an insulating plate according to an embodiment of the present application is shown;

[0029] Figure 7 A schematic diagram of the three-dimensional structure of a battery according to an embodiment of the present application is shown;

[0030] Figure 8 A schematic diagram showing the connection between a battery cell and a tab in accordance with an embodiment of the present application is shown.

[0031] Description of main component symbols:

[0032] 100-cover assembly; 110-base plate; 111-positioning groove; 120-pole; 121-base; 122-column; 1221-welding groove; 1221a-welding portion; 130-connecting piece; 140-cap; 150-fixing member; 160-insulating member; 161-mounting groove; 170-insulating plate; 171-positioning block; 172-assembly groove; 180-first sealing member; 190-second sealing member;

[0033] 200-battery cells;

[0034] 300-ear;

[0035] X-first direction; Y-second direction. DETAILED DESCRIPTION

[0036] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0037] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0039] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0041] Embodiment 1

[0042] See also Figures 1 to 7 In one embodiment of the present application, a cap plate assembly 100 is provided. The cap plate assembly 100 is used in a battery.

[0043] See also Figure 1, define the height direction of the cover assembly 100 as the first direction X; and the length direction of the cover assembly 100 as the second direction Y.

[0044] The first direction X is perpendicular to the second direction Y. It is understandable that the above definition is only for facilitating the understanding of the relative position relationship of the various parts in the cover assembly 100 and should not be construed as a limitation to the present application.

[0045] See also Figure 1 , Figure 2 and Figure 7 The cover plate assembly 100 includes a substrate 110 , a pole 120 and a connecting piece 130 .

[0046] The length direction of the substrate 110 is the same as the second direction Y.

[0047] The pole 120 is disposed through the substrate 110 and is fixedly connected to the substrate 110. The axial direction of the pole 120 is the same as the first direction X.

[0048] A welding groove 1221 is formed at one end of the pole 120 along the first direction X; the extending direction of the welding groove 1221 is the same as the first direction X. A welding portion 1221 a is formed on the inner wall of the welding groove 1221 along the first direction X.

[0049] The connecting piece 130 is disposed at one end of the pole 120 away from the welding groove 1221 along the first direction X and corresponds to the welding portion 1221a. The side of the connecting piece 130 away from the substrate 110 is used to connect to the tab 300; the connecting piece 130 is connected to the battery cell 200 through the tab 300.

[0050] An operator may heat the welding portion 1221 a on a side of the substrate 110 away from the battery cell 200 ; when the welding portion 1221 a is in a molten state, it can be fixedly connected to the connecting piece 130 , thereby fixing the pole 120 to the connecting piece 130 .

[0051] The welding groove 1221 can prevent welding slag generated when the welding portion 1221a melts from falling onto the battery cell 200, thereby preventing the welding slag from damaging the circuit inside the battery cell 200, thereby improving the safety of the cover plate assembly 100 and the battery cell 200 after connection.

[0052] In some embodiments, see Figure 1 , Figure 2 and Figure 4The pole 120 includes a column 122 and a base 121; the column 122 is disposed through the substrate 110 and is fixedly connected to the substrate 110. The axial direction of the column 122 is the same as the first direction X. One end of the column 122 along the first direction X is fixedly connected to the base 121. The side of the base 121 away from the column 122 is fixedly connected to the connecting piece 130; the welding groove 1221 is provided at one end of the column 122 along the first direction X away from the base 121.

[0053] When the welding portion 1221 a is melted, the molten welding portion 1221 a can cause the base 121 to melt, so that the base 121 is fixedly connected to the connecting piece 130 .

[0054] Exemplarily, the base 121 and the column 122 are fixedly connected by integral molding.

[0055] For example, the operator may fix the pole 120 and the connecting piece 130 together by laser welding.

[0056] In some embodiments, see Figure 1 , Figure 2 and Figure 6 ; The cover assembly 100 also includes an insulating plate 170; the insulating plate 170 is connected to one side of the substrate 110 along the first direction X; the column 122 passes through the substrate 110 and the insulating plate 170; the base 121 is arranged on a side of the insulating plate 170 away from the substrate 110.

[0057] The insulating plate 170 is used for insulation between the substrate 110 and the battery cell 200 and prevents the substrate 110 from shaking relative to the battery cell 200 .

[0058] In some embodiments, see Figure 4 and Figure 6 The insulating plate 170 has a mounting groove 172 on one side away from the base plate 110; the base 121 is disposed in the mounting groove 172. The inner wall of the mounting groove 172 can limit the rotation of the base 121 relative to the insulating plate 170 to ensure the stability of the fixed connection between the pole 120 and the base plate 110.

[0059] In some embodiments, the base 121 is square, and the assembly slot 172 is a square slot corresponding to the shape of the base 121. In other embodiments, the operator can select the shapes of the assembly slot 172 and the base 121 according to actual needs.

[0060] In some embodiments, see Figure 1 and Figure 5 A positioning block 171 is provided on one side of the insulating plate 170 away from the base 121; a positioning groove 111 is provided on the base plate 110; and the positioning block 171 is arranged in the positioning groove 111. The positioning block 171 cooperates with the inner wall of the positioning groove 111, so that the insulating plate 170 and the base plate 110 can be quickly positioned and installed.

[0061] In some embodiments, see Figure 1 and Figure 3 The cover plate assembly 100 further includes a cover cap 140 ; ​​the cover cap 140 blocks the opening of the welding groove 1221 .

[0062] The cover cap 140 can play a decorative role to improve the aesthetics of the cover plate assembly 100 .

[0063] In some embodiments, a buckle is provided on the cap 140 , and a buckle slot is provided on the inner wall of the welding slot 1221 ; the buckle is disposed in the buckle slot, so that the cap 140 can be detachably disposed in the welding slot 1221 .

[0064] In another embodiment, the cap 140 is fixed in the welding groove 1221 by welding.

[0065] In some embodiments, see Figures 1 to 4 The cover plate assembly 100 also includes a fixing member 150; the fixing member 150 is disposed on a side of the substrate 110 away from the base 121, and is sleeved on an end of the column 122 close to the welding groove 1221; the fixing member 150 is fixedly connected to the pole 120.

[0066] The fixing member 150 cooperates with the base 121 to fix the column 122 and the base plate 110 together.

[0067] Exemplarily, a fixing groove is formed on the fixing member 150 ; the column 122 is disposed in the fixing groove and is interference fit with the inner wall of the fixing groove, so that the column 122 is fixedly connected to the fixing member 150 .

[0068] In some embodiments, the cover assembly 100 further includes an insulating member 160 ; the insulating member 160 is disposed on a side of the substrate 110 away from the base 121 ; a mounting groove 161 is formed on the insulating member 160 ; and the fixing member 150 is disposed in the mounting groove 161 .

[0069] The insulating member 160 is made of insulating materials such as PPS (Polyphenylene sulfide) and can provide insulation protection for the fixing member 150 .

[0070] In some embodiments, see Figure 1 , Figure 2 and Figure 4 The cover plate assembly 100 further includes at least one sealing member; the sealing member is disposed between the substrate 110 and the column 122 .

[0071] The sealing member is used for insulation protection between the column 122 and the substrate 110 .

[0072] In some embodiments, the cover plate assembly 100 includes a plurality of seals; the plurality of seals are respectively a first seal 180 and a second seal 190 .

[0073] A portion of the first sealing member 180 is disposed between the substrate 110 and the column 122 , and another portion of the first sealing member 180 is disposed between the fixing member 150 and the substrate 110 .

[0074] A portion of the second sealing member 190 is disposed between the substrate 110 and the column 122 , and another portion of the second sealing member 190 is disposed between the base 121 and the substrate 110 .

[0075] Exemplarily, the first sealing member 180 and the second sealing member 190 are both rubber sealing gaskets.

[0076] Embodiment 2

[0077] See also Figures 1 to 8 The present application also provides a battery, comprising a battery cell 200, a tab 300 and the above-mentioned cover plate assembly 100. One end of the tab 300 is fixedly connected to the battery cell 200; and one end of the tab 300 away from the battery cell 200 is fixedly connected to a side of the connecting sheet 130 away from the substrate 110.

[0078] At present, in the prior art, the welding of the connecting piece and the pole usually occurs on the side of the substrate close to the battery cell, which makes it easy for welding slag to fall onto the battery cell; and the existing battery usually adopts the flat core closing step. Flat core closing means that the battery cell is laid flat, one end of the pole ear is welded to the battery cell, and the other end is welded to the connecting piece, and then the pole ear is bent to achieve the core closing. The bending of the pole ear not only has the risk of tearing and inserting the battery cell, but also takes up a large space.

[0079] In some embodiments, the end of the tab 300 away from the connecting sheet 130 is vertically fixed to the battery cell 200 to avoid tearing of the end of the tab 300 close to the battery cell 200 and to prevent the tab 300 from being inserted into the battery cell 200 .

[0080] After the tab 300 is fixedly connected to the battery cell 200, the battery cell 200 is placed vertically so that the tab 300 faces upwards; and then the end of the tab 300 away from the battery cell 200 is fixedly connected to the connecting sheet 130, thereby realizing vertical core closure.

[0081] The battery of the present application adopts a vertical core-closing method, which can effectively reduce the bending of the end of the pole tab 300 away from the connecting piece 130, improve space utilization, and prevent the pole tab 300 from tearing and preventing the pole tab 300 from being inserted into the battery cell 200.

[0082] The battery provided in this embodiment has the cover plate assembly 100 provided in any of the above embodiments, and therefore has all the beneficial effects of the cover plate assembly 100 provided in any of the above embodiments, which will not be described in detail here.

[0083] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0084] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A cover plate assembly, characterized in that: include: substrate; A pole, the pole is passed through the substrate and fixedly connected to the substrate; a welding groove is formed at one end of the pole; a welding portion is formed on the inner wall of the welding groove along the first direction; A connecting piece, which is arranged at one end of the pole away from the welding groove and corresponds to the welding portion; Wherein, the welding portion can be fixedly connected to the connecting piece when melted.

2. The cover plate assembly according to claim 1, characterized in that: The pole comprises a connected column and a base; the column passes through the substrate and is fixedly connected to the substrate; the side of the base away from the column is fixedly connected to the connecting piece; the welding groove is opened at one end of the column away from the base.

3. The cover plate assembly according to claim 2, characterized in that: The cover plate assembly also includes an insulating plate; the insulating plate is connected to one side of the base plate; the column is arranged through the base plate and the insulating plate; a mounting groove is formed on one side of the insulating plate away from the base plate; and the base is arranged in the mounting groove.

4. The cover plate assembly according to claim 3, characterized in that: A positioning block is arranged on one side of the insulating plate away from the base; a positioning groove is provided on the base plate; and the positioning block is arranged in the positioning groove.

5. The cover plate assembly according to any one of claims 1 to 4, characterized in that: The cover plate assembly also includes a cover cap; the cover cap is sealed at the opening of the welding groove.

6. The cover plate assembly according to any one of claims 1 to 4, characterized in that: The cover plate assembly also includes a fixing member; the fixing member is arranged on the base plate; the fixing member is sleeved on one end of the pole close to the welding groove and is fixedly connected to the pole.

7. The cover plate assembly according to claim 6, characterized in that: The cover plate assembly also includes an insulating member; the insulating member is arranged on the base plate; a mounting groove is formed on the insulating member; and the fixing member is arranged in the mounting groove.

8. The cover plate assembly according to any one of claims 1 to 4, characterized in that: The cover plate assembly further comprises a sealing member; the sealing member is arranged between the substrate and the pole.

9. A battery, characterized in that: It comprises a battery cell, a pole ear and a cover plate assembly as described in any one of claims 1 to 8; one end of the pole ear is fixedly connected to the battery cell; and one end of the pole ear away from the battery cell is fixedly connected to a side of the connecting plate away from the substrate.

10. The battery according to claim 9, characterized in that One end of the pole ear away from the connecting sheet is vertically fixed on the battery core.

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