Cover plate assembly of battery, battery, battery pack and electric equipment

Abstract

The utility model discloses a cover plate assembly of a battery, the battery, a battery pack and electric equipment. The cover plate assembly of the battery comprises a leading-out sheet, a cover plate and a cover plate, the cover plate is provided with a pole; and the connecting piece is connected between the leading-out sheet and the pole. By arranging the connecting piece to connect the leading-out sheet and the pole, the equipment is simple and easy to operate, the tool clamp is simple, the automation degree is high, the process efficiency and the yield can be improved, in addition, the cover plate and the leading-out sheet do not need to be pre-connected into a whole, the connecting efficiency is high, and the cost is reduced on the basis of improving the battery process efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to a battery cover assembly, a battery, a battery pack and electrical equipment. Background Art

[0002] In the related art, in the design of the battery cover assembly, there are two ways to connect the lead-out sheet and the pole of the cover, one is direct ultrasonic welding, and the other is laser welding. However, in the above two methods, the process efficiency and yield are low, the cost is high, and the equipment required for welding is complex and large in size, so it occupies a large area, thereby increasing the cost. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a battery cover assembly, the battery cover assembly equipment is simple and easy to operate, the tooling fixture is simple, the degree of automation is high, and the process efficiency and yield can be improved. In addition, the cover and the lead-out sheet do not need to be pre-connected into a whole, the connection efficiency is high, and the cost is reduced on the basis of improving the battery process efficiency.

[0004] The utility model further provides a battery.

[0005] The utility model further provides a battery pack.

[0006] The utility model further provides an electrical device.

[0007] The battery cover assembly according to the utility model comprises: a lead-out plate; a cover plate, on which a pole is arranged; and a connector, which is connected between the lead-out plate and the pole.

[0008] According to the cover plate assembly of the battery of the utility model, a connector is provided to connect the lead-out piece and the pole. The equipment is simple and easy to operate, the tooling fixture is simple, and the degree of automation is high, which can improve the process efficiency and yield. In addition, the cover plate and the lead-out piece do not need to be pre-connected into a whole, and the connection efficiency is high. On the basis of improving the battery process efficiency, the cost is reduced.

[0009] In some examples of the present invention, the connecting piece is pressure-fused and welded between the lead-out piece and the pole.

[0010] In some examples of the present invention, the melting point of the connecting member is lower than the melting point of the lead-out piece, and the melting point of the connecting member is lower than the melting point of the pole.

[0011] In some examples of the present invention, the connecting member is provided with a first connecting surface and a second connecting surface, the first connecting surface is connected to the lead-out piece, and the second connecting surface is connected to the pole.

[0012] In some examples of the present invention, the first connecting surface and the second connecting surface are both configured as planes.

[0013] In some examples of the present invention, the connecting member includes: a plurality of first connecting segments and a plurality of second connecting segments, the plurality of first connecting segments and the plurality of second connecting segments are alternately connected, and adjacent first connecting segments and second connecting segments are bent and connected.

[0014] In some examples of the present invention, the bending directions of the plurality of first connecting segments are the same, and the bending directions of the plurality of second connecting segments are the same.

[0015] In some examples of the present invention, an angle is formed between adjacent first connecting segments and second connecting segments, and the angle is an obtuse angle.

[0016] In some examples of the utility model, the connecting member includes: a main body and a protruding portion, wherein the protruding portion is arranged on the side of the main body facing the lead-out piece and / or the pole; or the connecting member is provided with the protruding portion, and a matching portion is provided on the pole and / or the lead-out piece opposite to the protruding portion, and the matching portion is a groove; or the connecting member is provided with the matching portion, and a protruding portion is provided on the pole and / or the lead-out piece corresponding to the matching portion.

[0017] In some examples of the present invention, the dimension of the protrusion on the main body is a, and the value range of a is: 0.01mm≤a≤5mm.

[0018] In some examples of the present invention, there are multiple protrusions, and the distance between adjacent protrusions is b, and the value range of b is: 0.05mm≤b≤10mm.

[0019] In some examples of the present invention, in the protruding direction of the protrusion, the cross-section of the protrusion is in the shape of at least one of a circle, a semicircle, a rectangle and a triangle.

[0020] In some examples of the utility model, the cover plate assembly of the battery also includes: a terminal, a first insulating member and a second insulating member, the cover plate is clamped between the first insulating member and the second insulating member, the cover plate, the terminal, the first insulating member and the second insulating member are correspondingly provided with through holes, the pole passes through the through holes of the second insulating member, the cover plate and the first insulating member in sequence, and the pole and the terminal are riveted and fixed at the top of the terminal.

[0021] In some examples of the present invention, an edge portion is provided at one end of the pole away from the terminal, and a diameter of the edge portion is greater than a diameter of the through hole.

[0022] The battery according to the utility model comprises: the battery cover assembly mentioned above.

[0023] The battery pack according to the utility model comprises: the battery mentioned above.

[0024] The electric device according to the utility model comprises: the battery pack mentioned above.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0027] Figure 1 is a cross-sectional view of a first embodiment of a cover plate assembly according to an embodiment of the utility model;

[0028] Figure 2 is a schematic structural diagram of a first embodiment of a connecting member;

[0029] Figure 3 is a cross-sectional view of a second embodiment of a cover plate assembly according to an embodiment of the utility model;

[0030] Figure 4 is a schematic structural diagram of a second embodiment of a connecting member;

[0031] Figure 5 is a cross-sectional view of a third embodiment of a cover plate assembly according to an embodiment of the utility model;

[0032] Figure 6 4 is a schematic structural diagram of a third embodiment of a connecting piece.

[0033] Reference numerals:

[0034] 1. Cover plate assembly;

[0035] 10. Lead-out piece; 20. Cover plate; 21. Pole; 22. Edge portion; 30. Connector; 31. First connecting surface; 32. Second connecting surface; 33. First connecting section; 34. Second connecting section; 35. Main body; 36. Raised portion; 40. Terminal; 50. First insulating member; 60. Second insulating member. DETAILED DESCRIPTION

[0036] The embodiments of the present utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present utility model are described in detail below.

[0037] Reference below Figure 1-Figure 6 A cover plate assembly 1 of a battery according to an embodiment of the present utility model is described.

[0038] like Figure 1 , Figure 3 and Figure 5 As shown, the battery cover assembly 1 according to the embodiment of the utility model comprises: a lead-out sheet 10, a cover plate 20 and a connector 30. The lead-out sheet 10 is mainly used to lead out the current and information of the battery, the cover plate 20 can play the role of covering and sealing the battery housing, and the connector 30 can play the role of intermediate connection.

[0039] like Figure 1 , Figure 3 and Figure 5 As shown, the cover plate 20 is provided with a pole 21, and the connector 30 is connected between the lead-out piece 10 and the pole 21. First, the connector 30 is connected between the lead-out piece 10 and the pole 21, so that the lead-out piece 10 and the pole 21 can be connected, and the current and information of the battery can be transmitted to the pole 21, so that the pole 21 on the cover plate 20 can be connected to the outside.

[0040] Therefore, by providing a connector 30 to connect the lead-out piece 10 and the pole 21, the equipment is simple and easy to operate, the tooling fixture is simple, and the degree of automation is high, which can improve the process efficiency and yield. In addition, the cover plate 20 and the lead-out piece 10 do not need to be pre-connected into a whole, and the connection efficiency is high, which reduces costs while improving the battery process efficiency.

[0041] Secondly, the connector 30 is connected between the lead-out piece 10 and the pole 21 by pressure melting welding, and the melting point of the connector 30 is lower than that of the lead-out piece 10, and the melting point of the connector 30 is lower than that of the pole 21. It can be understood that the connector 30 has a low melting point, so it can be welded between the lead-out piece 10 and the pole 21 by hot pressing melting, which can reduce the process difficulty, improve the process efficiency, and improve the connection quality. In addition, the welding time is short, oxygen can be isolated, and the oxidation, deformation and degeneration of the pole ear can be avoided. During the welding process, problems such as spatter, undercut, welding deviation, welding holes and welding cracks can be avoided, thereby avoiding problems such as inefficiency caused by repair, joint surface treatment and other processes and waste of resources caused by battery scrapping. In addition, there is no metal foreign matter in the entire welding process, which reduces the short circuit rate of the battery.

[0042] A first optional embodiment, such as Figure 1 and Figure 2As shown, the connector 30 is provided with a first connecting surface 31 and a second connecting surface 32, the first connecting surface 31 is connected to the lead-out piece 10, and the second connecting surface 32 is connected to the pole 21. That is, the connector 30 is connected to the lead-out piece 10 by pressure fusion welding through the first connecting surface 31, and is connected to the pole 21 by pressure fusion welding through the second connecting surface 32, so that the lead-out piece 10 and the pole 21 can be firmly and stably connected together through the connector 30.

[0043] Among them, Figure 2 As shown, the first connection surface 31 and the second connection surface 32 are both constructed as planes. On the premise of ensuring that the connector 30 has a certain connection strength after pressure fusion welding, the first connection surface 31 and the second connection surface 32 are both constructed as planes, which can make the overall structure of the connector 30 simpler and easier to process and manufacture.

[0044] A second optional embodiment, such as Figure 3 and Figure 4 As shown, the connector 30 includes: a plurality of first connecting segments 33 and a plurality of second connecting segments 34, the plurality of first connecting segments 33 and the plurality of second connecting segments 34 are alternately connected, and the adjacent first connecting segments 33 and the second connecting segments 34 are bent and connected. That is to say, the plurality of first connecting segments 33 and the plurality of second connecting segments 34 are connected to form a wave-like structure, so the connector 30 can form a structure protruding in two directions. Specifically, a pointed protrusion is provided on the side of the connector 30 facing the lead-out piece 10, and a pointed protrusion is also provided on the side of the connector 30 facing the pole 21. By pressure-melting the connector 30 with the pointed protrusion between the lead-out piece 10 and the pole 21, the connection strength between the lead-out piece 10 and the pole 21 can be improved.

[0045] Among them, Figure 4 As shown, the bending directions of the plurality of first connecting segments 33 are the same, and the bending directions of the plurality of second connecting segments 34 are the same. The bending directions of the plurality of first connecting segments 33 are all set to the same direction, and the bending directions of the plurality of second connecting segments 34 are all set to the same direction, so that the entire connector 30 can form a structure that bends and extends in the same direction, which can reduce the volume of the connector 30 and facilitate the processing and setting of the connector 30.

[0046] In addition, if Figure 4 As shown, an angle is formed between the adjacent first connecting segments 33 and the second connecting segments 34, and the angle is an obtuse angle. By setting the angle between the adjacent first connecting segments 33 and the second connecting segments 34 to an obtuse angle, sufficient residual of the connecting member 30 on the welding surface can be achieved during the welding process, thereby improving the welding strength.

[0047] A third optional embodiment, such as Figure 5 and Figure 6As shown, the connector 30 includes: a main body 35 and a protrusion 36, the protrusion 36 is arranged on the side of the main body 35 facing the lead-out piece 10 and / or the pole 21, or the connector 30 is provided with the protrusion 36, and the pole 21 and / or the lead-out piece 10 opposite to the protrusion 36 is provided with a matching portion, and the matching portion is a groove, or the connector 30 is provided with the matching portion, and the protrusion 36 is provided on the pole 21 and / or the lead-out piece 10 corresponding to the matching portion. The main body 35 is the main structure of the connector 30, and the protrusion 36 is a protruding structure. Preferably, the protrusion 36 is arranged on the side of the main body 35 facing the lead-out piece 10, and at the same time, the protrusion 36 is arranged on the side of the main body 35 facing the pole 21, so that when the connector 30 is welded with the lead-out piece 10 and the pole 21, the connection strength between the connector 30 and the lead-out piece 10 can be improved, and the connection strength between the connector 30 and the pole 21 can also be improved, thereby improving the connection strength between the lead-out piece 10 and the pole 21. Of course, on the premise of ensuring the connection strength between the lead-out piece 10 and the pole 21, the protrusion 36 can also be arranged only on one side of the main body 35.

[0048] In addition, by providing a protrusion 36 on the connector 30 and a matching portion on the pole 21 and / or the lead-out piece 10, or by providing a matching portion on the connector 30 and a protrusion 36 on the pole 21 and / or the lead-out piece 10, the connection strength between the connector 30 and the lead-out piece 10 and the connection strength between the connector 30 and the pole 21 can be improved.

[0049] Among them, the protruding dimension of the protruding portion 36 on the main body 35 is a, and the value range of a is: 0.01mm≤a≤5mm. The protruding dimension of the protruding portion 36 on the main body 35 needs to meet certain requirements. The protruding dimension of the protruding portion 36 on the main body 35 cannot be too small, that is, less than 0.01mm, so that the protrusion of the protruding portion 36 is not obvious, and the effect of improving the connection strength between the lead-out piece 10 and the pole 21 is not obvious. Of course, the protruding dimension of the protruding portion 36 on the main body 35 cannot be too large, that is, greater than 5mm, so that the protruding dimension of the protruding portion 36 is too large, and it is not easy to perform pressure melting welding. Moreover, when ensuring that the protruding portion 36 can improve the connection strength, this will increase the material for making the protruding portion 36, thereby increasing the cost.

[0050] In addition, if Figure 6As shown, there are multiple protrusions 36, and the distance between adjacent protrusions 36 is b, and the value range of b is: 0.05mm≤b≤10mm. There are multiple protrusions 36, which can ensure the connection effect of the connector 30. Similarly, the distance between adjacent protrusions 36 needs to meet certain requirements. The distance between adjacent protrusions 36 cannot be too large, that is, greater than 10mm. In this way, the arrangement between the protrusions 36 is relatively sparse, so the effect of improving the connection strength between the lead-out sheet 10 and the pole 21 is not obvious. Of course, the distance between adjacent protrusions 36 cannot be too small, that is, less than 0.05mm. In this way, the protrusions 36 are too dense and difficult to process and set. Moreover, when ensuring that the protrusions 36 can improve the connection strength, the material for making the protrusions 36 will increase, thereby increasing the cost.

[0051] Of course, if Figure 6 As shown, in the protruding direction of the protrusion 36, the cross-sectional shape of the protrusion 36 is at least one of a circle, a semicircle, a rectangle and a triangle. That is to say, the cross-sectional shape of the protrusion 36 is one of a circle, a semicircle, a rectangle and a triangle, or two or more of the circle, a semicircle, a rectangle and a triangle, so that the diversity of the protrusion 36 can be improved, and the guiding property of the connector 30 can be realized to a certain extent. For example, the protrusions 36 are arranged on both sides of the main body 35, and when there are different requirements for the protrusions 36 on both sides, the cross-sectional shape of the protrusion 36 on the side of the main body 35 facing the lead-out sheet 10 can be a circle, and the cross-sectional shape of the protrusion 36 on the side of the main body 35 facing the pole 21 can be a rectangle. In this way, when the connector 30 is welded, it can be installed and set according to the different cross-sectional shapes of the protrusion 36, so that the assembly efficiency of the connector 30 can be improved. Of course, the matching of the protrusions 36 with different cross-sectional shapes is not limited to this.

[0052] In addition, if Figure 1 , Figure 3 and Figure 5As shown, the cover plate assembly 1 of the battery also includes: a terminal 40, a first insulating member 50 and a second insulating member 60, the cover plate 20 is sandwiched between the first insulating member 50 and the second insulating member 60, the cover plate 20, the terminal 40, the first insulating member 50 and the second insulating member 60 are all provided with through holes correspondingly, the pole 21 passes through the through holes of the second insulating member 60, the cover plate 20 and the first insulating member 50 in sequence, and the pole 21 is riveted and fixed to the terminal 40 at the top of the terminal 40. The cover plate 20 is sandwiched between the first insulating member 50 and the second insulating member 60, which can play a certain role in insulation, and the cover plate 20, the terminal 40, the first insulating member 50 and the second insulating member 60 are all provided with through holes correspondingly, so that one end of the pole 21 can pass through the through holes of the second insulating member 60, the cover plate 20 and the first insulating member 50 in sequence, and then fit in the through hole at the top of the terminal 40, and be riveted and fixed to the top of the terminal 40, so that the arrangement of the pole 21 can be more firmly and stably arranged.

[0053] Of course, if Figure 1 , Figure 3 and Figure 5 As shown, an edge portion 22 is provided at one end of the pole 21 away from the terminal 40, and the diameter of the edge portion 22 is greater than the diameter of the through hole. In other words, one end of the pole 21 is penetrated by the through hole, and the other end of the pole 21 is provided with an edge portion 22, and the diameter of the edge portion 22 is greater than the diameter of the through hole, so that when the through hole is penetrated at one end of the pole 21, the pole 21 will not be penetrated by the through hole as a whole, so that the arrangement of the pole 21 can be more reasonable and effective.

[0054] The battery according to the embodiment of the utility model comprises: the battery cover assembly 1 described in the above embodiment.

[0055] A battery pack according to an embodiment of the present invention includes: the battery described in the above embodiment.

[0056] The electric device according to the embodiment of the utility model includes: the battery pack described in the above embodiment.

[0057] In the description of the present invention, 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 invention 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 invention.

[0058] In the description of the present utility model, "first feature" and "second feature" may include one or more of the features. In the description of the present utility model, "plurality" means two or more. In the description of the present utility model, the first feature "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact not directly but through another feature between them. In the description of the present utility model, the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

[0059] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" 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 utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0060] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery cover assembly (1), characterized in that: include: Lead-out piece (10); A cover plate (20), wherein a pole (21) is arranged on the cover plate (20); A connecting piece (30), the connecting piece (30) being connected between the lead-out piece (10) and the pole (21).

2. The battery cover assembly (1) according to claim 1, characterized in that: The connecting piece (30) is pressure-fused and welded between the lead-out piece (10) and the pole (21).

3. The battery cover assembly (1) according to claim 1, characterized in that: The melting point of the connecting piece (30) is lower than the melting point of the lead-out piece (10), and the melting point of the connecting piece (30) is lower than the melting point of the pole (21).

4. The battery cover assembly (1) according to claim 1, characterized in that: The connecting member (30) is provided with a first connecting surface (31) and a second connecting surface (32), the first connecting surface (31) being connected to the lead-out piece (10), and the second connecting surface (32) being connected to the pole (21).

5. The battery cover assembly (1) according to claim 4, characterized in that: The first connecting surface (31) and the second connecting surface (32) are both configured as planes.

6. The battery cover assembly (1) according to claim 1, characterized in that: The connecting member (30) comprises: a plurality of first connecting segments (33) and a plurality of second connecting segments (34), wherein the plurality of first connecting segments (33) and the plurality of second connecting segments (34) are alternately connected, and adjacent first connecting segments (33) and second connecting segments (34) are connected in a bent manner.

7. The battery cover assembly (1) according to claim 6, characterized in that: The bending directions of the plurality of first connecting sections (33) are the same, and the bending directions of the plurality of second connecting sections (34) are the same.

8. The battery cover assembly (1) according to claim 6, characterized in that: An angle is formed between adjacent first connecting segments (33) and second connecting segments (34), and the angle is an obtuse angle.

9. The battery cover assembly (1) according to claim 1, characterized in that: The connecting member (30) comprises: a main body (35) and a protruding portion (36), wherein the protruding portion (36) is arranged on a side of the main body (35) facing the lead-out piece (10) and / or the pole (21); or The connecting member (30) is provided with a protrusion (36), and a matching portion is provided on the pole (21) and / or the lead-out piece (10) opposite to the protrusion (36), and the matching portion is a groove; or The connecting piece (30) is provided with a matching portion, and a protrusion (36) is provided on the pole (21) and / or the lead-out piece (10) corresponding to the matching portion.

10. The battery cover assembly (1) according to claim 9, characterized in that: The protrusion (36) protrudes from the main body (35) by a dimension a, and the value range of a is: 0.01 mm≤a≤5 mm.

11. The battery cover assembly (1) according to claim 9, characterized in that: There are a plurality of protrusions (36), and the distance between adjacent protrusions (36) is b, with the value range of b being: 0.05 mm ≤ b ≤ 10 mm.

12. The battery cover assembly (1) according to claim 9, characterized in that: In the protruding direction of the protruding portion (36), the cross-sectional shape of the protruding portion (36) is at least one of a circular shape, a semicircular shape, a rectangular shape and a triangular shape.

13. The battery cover assembly (1) according to claim 1, characterized in that: Also includes: A terminal (40), a first insulating member (50) and a second insulating member (60), the cover plate (20) being sandwiched between the first insulating member (50) and the second insulating member (60), the cover plate (20), the terminal (40), the first insulating member (50) and the second insulating member (60) being correspondingly provided with through holes, the pole (21) passing through the through holes of the second insulating member (60), the cover plate (20) and the first insulating member (50) in sequence, and the pole (21) and the terminal (40) being riveted and fixed to each other at the top of the terminal (40).

14. The battery cover assembly (1) according to claim 13, characterized in that: An edge portion (22) is provided at one end of the pole (21) away from the terminal (40), and the diameter of the edge portion (22) is greater than the diameter of the through hole.

15. A battery, characterized in that: include: A cover plate assembly (1) for a battery according to any one of claims 1 to 14.

16. A battery pack, characterized in that: include: The battery as claimed in claim 15.

17. An electrical equipment, characterized in that: include: The battery pack as claimed in claim 16.

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