Cover plate assembly, battery and electric equipment

Abstract

The utility model discloses a cover plate assembly, a battery and electric equipment. The cover plate assembly comprises a cover body and a first pole, the cover body is provided with a first surface, and the first surface is provided with a first positioning groove; the first pole is arranged in the first positioning groove, and the first pole and the cover body are arranged in an insulated manner; the first pole is recessed relative to the first surface. According to the cover plate assembly provided by the embodiment of the invention, the first pole is arranged in a sunken manner relative to the first surface, namely, the first pole is arranged to be lower than the cover body. Therefore, the first pole does not hinder the clamping operation of a clamp in a battery manufacturing process; and moreover, the first pole column which is lower than the cover body is arranged, so that the risk that the battery is damaged due to collision in the carrying, storage and use processes of the battery is avoided.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and more specifically, to a cover plate assembly, a battery and an electrical device. Background Art

[0002] In recent years, with the development of science and technology, various electronic products have gradually entered thousands of households and become people's daily necessities. As the power source of electronic products, the performance of batteries in all aspects is one of the important indicators to measure the quality of electronic products.

[0003] Batteries are usually provided with a battery cover to ensure the sealing of the battery. In the prior art, the poles in the battery cover are protruding; this not only increases the difficulty coefficient of process operation during the battery manufacturing process, but also during the use of the battery, the protruding poles have a higher risk of collision damage and sealing failure.

[0004] In view of this, it is necessary to propose a new technical solution to solve the above technical problems. Utility Model Content

[0005] One purpose of the present application is to provide a new technical solution for a cover assembly, a battery and an electrical device.

[0006] According to a first aspect of the present application, a cover plate assembly is provided, the cover plate assembly comprising:

[0007] A cover body, wherein the cover body has a first surface, and a first positioning groove is formed on the first surface;

[0008] A first pole is disposed in the first positioning groove and is insulated from the cover body; the first pole is recessed relative to the first surface.

[0009] Optionally, the first pole is recessed relative to the first surface to a depth of 0.3+ / -0.2 mm.

[0010] Optionally, the cover plate assembly further includes an insulating member, the insulating member is disposed in the first positioning groove, and the insulating member is located between the cover body and the first pole;

[0011] The insulating member is recessed relative to the first surface.

[0012] Optionally, the insulating member is provided with a second positioning groove, and the first pole is arranged in the second positioning groove.

[0013] Optionally, the cover body has a second surface disposed opposite to the first surface, and the cover body has a first through hole portion in the first positioning groove that passes through to the second surface; the first pole has a second through hole portion, and the first through hole portion and the second through hole portion are disposed correspondingly;

[0014] The cover plate assembly further includes a second pole, the second pole is passed through the first through hole portion and the second through hole portion, and the second pole is insulated from the cover body.

[0015] Optionally, the cover plate assembly further includes a lead-out piece connected to the second pole, the lead-out piece is insulated from the cover body, and the lead-out piece is located on a side of the second surface away from the first surface.

[0016] Optionally, the second pole and the lead-out piece are an integrally formed structure.

[0017] Optionally, the cover plate assembly further includes an insulating spacer, and the insulating spacer is disposed between the cover body and the lead-out piece.

[0018] Optionally, the insulating partition is provided with a third through hole portion, and the second pole is passed through the third through hole portion.

[0019] Optionally, the insulating partition is provided with a mounting groove and a connecting groove, and the connecting groove is located at a side of the mounting groove;

[0020] The lead-out piece is arranged in the installation groove, and connecting protrusions are arranged at intervals on both sides of the lead-out piece in the width direction, and the connecting protrusions are matched and connected with the connecting groove.

[0021] Optionally, the cover plate assembly further includes a sealing ring, and the sealing ring is penetrated through the first through hole portion to isolate the cover body and the second pole.

[0022] Optionally, the cover plate assembly further includes an insulating ring, which is passed through the third through hole and sleeved on the outside of the sealing ring; the insulating ring is connected to both the cover body and the lead-out piece.

[0023] Optionally, the cover body and the insulating ring are connected by brazing, and the lead-out piece and the insulating ring are connected by brazing.

[0024] Optionally, the second pole is connected to the first pole at the second through hole portion by laser welding.

[0025] According to a second aspect of the present application, a battery is provided, wherein the battery includes the cover plate assembly as described in the first aspect.

[0026] According to a third aspect of the present application, an electrical device is provided, wherein the electrical device comprises the battery as described in the second aspect.

[0027] The technical solution adopted in this application can achieve the following beneficial effects:

[0028] In the cover plate assembly provided in the embodiment of the present application, the first pole is recessed relative to the first surface, that is, the first pole is arranged lower than the cover body. In this way, the first pole will not hinder the clamping operation of the clamp in the battery manufacturing process; and the first pole arranged lower than the cover body will not be at risk of being damaged by collision during the transportation, storage and use of the battery.

[0029] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0031] Figure 1 The overall structure of the cover assembly according to an embodiment of the present application is shown in FIG. Figure 1 ;

[0032] Figure 2 is a schematic diagram of the exploded structure of a cover plate assembly according to an embodiment of the present application;

[0033] Figure 3 is a partial cross-sectional structural schematic diagram of a cover plate assembly according to an embodiment of the present application;

[0034] Figure 4 The overall structure of the cover assembly according to an embodiment of the present application is shown in FIG. Figure 2 .

[0035] Description of reference numerals:

[0036] 1. Cover plate assembly; 11. Cover body; 111. First surface; 1110. First positioning groove; 112. Second surface; 110. First through hole portion; 12. First pole; 120. Second through hole portion; 13. Insulator; 130. Second positioning groove; 131. Fourth through hole portion; 14. Second pole; 15. Lead-out piece; 151. Connecting protrusion; 16. Insulating partition; 160. Third through hole portion; 161. Mounting groove; 162. Connecting groove; 17. Sealing ring; 18. Insulating ring. DETAILED DESCRIPTION

[0037] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0038] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0039] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0040] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0041] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0042] Reference Figure 1-Figure 4 As shown, according to an embodiment of the present application, a cover plate assembly 1 is provided. The cover plate assembly 1 includes a cover body 11 and a first pole 12, the cover body 11 has a first surface 111, and the first surface 111 is provided with a first positioning groove 1110;

[0043] The first pole 12 is disposed in the first positioning groove 1110 , and the first pole 12 is insulated from the cover body 11 ; the first pole 12 is recessed relative to the first surface 111 .

[0044] In the cover plate assembly 1 provided in the embodiment of the present application, a first positioning groove 1110 is provided on the first surface 111 of the cover body 11, and the first pole 12 is arranged in the first positioning groove 1110, so as to provide good positioning and fixing effect for the first pole 12 and avoid position displacement of the first pole 12.

[0045] In addition, in the prior art, the pole on the battery cover generally protrudes about 8-10mm from the cover surface, and the edge of the pole is close to the large surface of the battery (usually 2-4mm); in the process of welding the battery cover and the battery shell, it is necessary to clamp the large surface of the battery with a clamp, and the protruding pole is not convenient for the clamping operation. Moreover, during the transportation, storage and use of the battery, the protruding pole is easily hit, which may cause the pole weld to crack, and then cause a safety accident.

[0046] In the cover plate assembly 1 provided in the embodiment of the present application, the first pole 12 is recessed relative to the first surface 111, that is, the first pole 12 is arranged lower than the cover body 11. In this way, the first pole 12 will not hinder the clamping operation of the clamp in the battery manufacturing process; and the first pole 12 arranged lower than the cover body 11 will not be at risk of being damaged by collision during the transportation, storage and use of the battery.

[0047] In one embodiment, the first pole 12 is recessed relative to the first surface 111 to a depth of 0.3+ / -0.2 mm.

[0048] In this specific example, the depth of the recessed setting of the first pole 12 relative to the first surface 111 is controlled within the range of 0.3+ / -0.2 mm, which can ensure that the first pole 12 does not protrude from the cover body 11; and can ensure that the first pole 12 does not sink too much relative to the cover body 11 and affect the subsequent process technology of the battery pack.

[0049] Reference Figure 1 to Figure 3 As shown, in one embodiment, the cover plate assembly further includes an insulating member 13, which is disposed in the first positioning groove 1110, and the insulating member 13 is located between the cover body 11 and the first pole 12; the insulating member 13 is recessed relative to the first surface 111.

[0050] In this specific example, the insulating member 13 is used to realize the insulation setting between the cover body 11 and the first pole 12. The insulating member 13 is arranged in the first positioning groove 1110 of the cover body 11 to isolate the cover body 11 and the first pole 12. In addition, the insulating member 13 is also arranged lower than the cover body 11. In this way, it is ensured that the insulating member 13 will not hinder the clamping operation of the clamp in the battery manufacturing process.

[0051] Reference Figure 2 As shown, in one embodiment, the insulating member 13 is provided with a second positioning groove 130 , and the first pole 12 is disposed in the second positioning groove 130 .

[0052] In this specific example, the insulating member 13 is arranged in the first positioning groove 1110 of the cover body 11, and the first pole 12 is arranged in the second positioning groove 130 of the insulating member 13; this can ensure that the insulating member 13 isolates the cover body 11 and the first pole 12 in all directions, avoiding the risk of insulation failure between the cover body 11 and the first pole 12.

[0053] Reference Figure 2 , Figure 3As shown, in one embodiment, the cover body 11 has a second surface 112 disposed opposite to the first surface 111, and the cover body 11 has a first through hole portion 110 in the first positioning groove 1110 that passes through to the second surface 112; the first pole 12 has a second through hole portion 120, and the first through hole portion 110 and the second through hole portion 120 are disposed correspondingly;

[0054] The cover plate assembly further includes a second pole 14 and a lead-out sheet 15 connected to each other, the second pole 14 is passed through the first through hole 110 and the second through hole 120, and the second pole 14 is insulated from the cover body 11;

[0055] The lead-out piece 15 is insulated from the cover body 11 , and the lead-out piece 15 is located on a side of the second surface 112 away from the first surface 111 .

[0056] In this specific example, the second pole 14 is welded to the first pole 12; and in the subsequent battery manufacturing and packaging process, the lead-out tab 15 is welded to the battery's tab; thus, the first pole 12 is connected to the battery's tab. Since the cover body 11 will be welded to the battery shell in the subsequent battery manufacturing and packaging process, in order to prevent the battery shell from being charged, the cover body 11 and the first pole 12, the cover body 11 and the second pole 14, and the cover body 11 and the lead-out tab 15 are all insulated.

[0057] In addition, a fourth through hole portion 131 is formed in the insulating member 13 , and the second pole 14 is also passed through the fourth through hole portion 131 .

[0058] Reference Figure 2 , Figure 3 As shown, in one embodiment, the second pole 14 and the lead-out piece 15 are an integrally formed structure.

[0059] In this specific example, the second pole 14 and the lead-out piece 15 are integrally formed, so there is no need to perform laser welding on the second pole 14 and the lead-out piece 15, thereby making the manufacturing and assembly process of the cover plate assembly 1 simpler and more efficient.

[0060] In addition, if the second pole and the lead sheet are of a split structure, they need to be connected by welding, and the surface will be uneven in the welding area; when the lead sheet and the pole ear are welded, the pole ear needs to avoid the welding area between the second pole and the lead sheet, so that the lead sheet has a small available area for the pole ear. In this embodiment, the second pole 14 and the lead sheet 15 are of an integrated structure to avoid the above problems; the available area of ​​the lead sheet 15 is larger than that of the split design, which can provide a larger pole ear welding surface, thereby improving the current capacity.

[0061] Reference Figure 2 , Figure 3 As shown, in one embodiment, the cover plate assembly further includes an insulating spacer 16 , and the insulating spacer 16 is disposed between the cover body 11 and the lead-out plate 15 .

[0062] In this specific example, the insulating partition 16 isolates the cover body 11 from the lead-out plate 15 , ensuring that the cover body 11 and the lead-out plate 15 are insulated from each other.

[0063] Reference Figure 2 , Figure 3 As shown, in one embodiment, the insulating partition 16 is provided with a third through hole portion 160 , and the second pole 14 is passed through the third through hole portion 160 .

[0064] In this specific example, the insulating spacer 16 covers the entire cover body 11 , and the third through hole 160 formed on the insulating spacer 16 is used to avoid the second pole 14 .

[0065] Reference Figure 4 As shown, in one embodiment, the insulating partition 16 is provided with a mounting groove 161 and a connecting groove 162, and the connecting groove 162 is located at the side of the mounting groove 161;

[0066] The lead-out piece 15 is disposed in the mounting groove 161 . The lead-out piece 15 is provided with connecting protrusions 151 at intervals on both sides in the width direction thereof. The connecting protrusions 151 are matched and connected with the connecting groove 162 .

[0067] In this specific example, the lead-out piece 15 is arranged in the mounting groove 161 of the insulating partition 16, and the connecting protrusion 151 of the lead-out piece 15 cooperates with the connecting groove 162 on the inner side of the insulating partition 16; such a setting enhances the design area of ​​the lead-out piece 15, and at the same time, the connection between the lead-out piece 15 and the insulating partition 16 is tighter, the lead-out piece 15 has a larger flow area and a higher structural stability.

[0068] Reference Figure 2 , Figure 3As shown, in one embodiment, the cover plate assembly further includes a sealing ring 17 and an insulating ring 18, and the sealing ring 17 is passed through the first through hole portion 110 to isolate the cover body 11 and the second pole 14;

[0069] The insulating ring 18 is passed through the third through hole 160 and sleeved on the outside of the sealing ring 17 ; the insulating ring 18 is connected to both the cover body 11 and the lead-out piece 15 .

[0070] In this specific example, the sealing ring 17 plays an insulating and sealing role between the cover body 11 and the second pole 14; the insulating ring 18 sleeved on the outside of the sealing ring 17 cooperates with the sealing ring 17 to play a double sealing and insulating role, thereby improving the safety and reliability of the battery.

[0071] Generally speaking, the sealing ring 17 is made of plastic, such as PVC, EVA, etc., which is easily affected by the heat of the welding process. The insulating ring 18 is made of ceramic, which is not affected by the heat of the welding process, and thus can ensure a good insulating and sealing effect.

[0072] Reference Figure 2 , Figure 3 As shown, in one embodiment, the cover body 11 and the insulating ring 18 are connected by brazing, and the lead-out piece 15 and the insulating ring 18 are connected by brazing.

[0073] In this specific example, the cover body 11 and the insulating ring 18, as well as the lead-out piece 15 and the insulating ring 18 are connected by brazing; thus, while ensuring that the welding process is accessible, a welding effect with less deformation and higher efficiency can be obtained.

[0074] Reference Figure 2 , Figure 3 As shown, a soldering area a is formed between the cover body 11 and the insulating ring 18 , and a soldering area b is formed between the lead-out piece 15 and the insulating ring 18 .

[0075] Reference Figure 1 As shown, in one embodiment, the second pole 14 is connected to the first pole 12 at the second through hole portion 120 by laser welding to form a laser weld c.

[0076] In this specific example, the second pole 14 is connected to the first pole 12 by laser welding, which is conducive to forming a stable connection at a faster welding speed.

[0077] Optionally, the first pole 12 is made of aluminum or copper; the insulating member 13 is made of plastic, such as PE, PP, etc.; the cover body 11 is made of aluminum; the insulating partition 16 is made of plastic, such as PP, etc.; the second pole 14 and the lead-out piece 15 are made of aluminum or copper.

[0078] In addition, the number of the second poles 14 may be multiple, for example, two; and the number of the second poles 14, the insulating rings 18, and the sealing rings 17 are all the same.

[0079] According to another embodiment of the present application, a battery is provided, which includes the cover plate assembly 1 as described above; and also includes a shell, and the cover body 11 in the cover plate assembly 1 is welded to the shell.

[0080] According to another embodiment of the present application, there is provided an electric device, the electric device comprising the battery as described above. The electric device may be, for example, an electric vehicle.

[0081] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0082] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A cover plate assembly, characterized in that: The cover plate assembly comprises: A cover body (11), the cover body (11) having a first surface (111), the first surface (111) being provided with a first positioning groove (1110); A first pole (12), wherein the first pole (12) is arranged in the first positioning groove (1110), and the first pole (12) is insulated from the cover body (11); the first pole (12) is recessed relative to the first surface (111).

2. The cover plate assembly according to claim 1, characterized in that: The first pole (12) is recessed relative to the first surface (111) to a depth of 0.3+ / -0.2 mm.

3. The cover plate assembly according to claim 2, characterized in that: The cover plate assembly further comprises an insulating member (13), wherein the insulating member (13) is arranged in the first positioning groove (1110), and the insulating member (13) is located between the cover body (11) and the first pole (12); The insulating member (13) is arranged recessed relative to the first surface (111).

4. The cover plate assembly according to claim 3, characterized in that: The insulating member (13) is provided with a second positioning groove (130), and the first pole (12) is arranged in the second positioning groove (130).

5. The cover plate assembly according to claim 1, characterized in that: The cover body (11) has a second surface (112) disposed opposite to the first surface (111), and the cover body (11) has a first through hole portion (110) in the first positioning groove (1110) and is connected to the second surface (112); the first pole (12) has a second through hole portion (120), and the first through hole portion (110) and the second through hole portion (120) are disposed correspondingly; The cover plate assembly further comprises a second pole (14), the second pole (14) being inserted through the first through hole portion (110) and the second through hole portion (120), and the second pole (14) being insulated from the cover body (11).

6. The cover plate assembly according to claim 5, characterized in that: The cover plate assembly further comprises a lead-out piece (15) connected to the second pole (14); the lead-out piece (15) is insulated from the cover body (11), and the lead-out piece (15) is located on a side of the second surface (112) away from the first surface (111).

7. The cover plate assembly according to claim 6, characterized in that: The second pole (14) and the lead-out piece (15) are an integrally formed structure.

8. The cover plate assembly according to claim 6, characterized in that: The cover plate assembly further comprises an insulating spacer (16), wherein the insulating spacer (16) is arranged between the cover body (11) and the lead-out plate (15).

9. The cover plate assembly according to claim 8, characterized in that: The insulating partition (16) is provided with a third through hole portion (160), and the second pole (14) is passed through the third through hole portion (160).

10. The cover plate assembly according to claim 8, characterized in that: The insulating partition (16) is provided with a mounting groove (161) and a connecting groove (162), and the connecting groove (162) is located on the side of the mounting groove (161); The lead-out piece (15) is arranged in the mounting groove (161), and connecting protrusions (151) are arranged at intervals on both sides of the lead-out piece (15) in the width direction thereof, and the connecting protrusions (151) are matched and connected with the connecting groove (162).

11. The cover plate assembly according to claim 1, characterized in that: The cover plate assembly further comprises a second pole (14), a lead-out piece (15) and a sealing ring (17); the second pole (14) and the lead-out piece (15) are connected to each other, and the second pole (14) and the lead-out piece (15) are both insulated from the cover body (11); The sealing ring (17) is arranged between the second pole (14) and the cover body (11) to isolate the cover body (11) from the second pole (14).

12. The cover plate assembly according to claim 11, characterized in that: The cover plate assembly also includes an insulating ring (18), which is sleeved on the outside of the sealing ring (17); the insulating ring (18) is connected to both the cover body (11) and the lead-out piece (15).

13. The cover plate assembly according to claim 12, characterized in that: The cover body (11) and the insulating ring (18) are connected by brazing, and the lead-out piece (15) and the insulating ring (18) are connected by brazing.

14. The cover plate assembly according to claim 5, characterized in that: The second pole (14) and the first pole (12) are connected at the second through hole portion (120) by laser welding.

15. A battery, characterized in that: The battery comprises a cover plate assembly (1) as claimed in any one of claims 1 to 14.

16. An electrical equipment, characterized in that: The electric device comprises the battery as claimed in claim 15.

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