Battery top cover and power battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery top cover and a power battery, which comprise a top cover sheet, an insulating plate and a pole. The top cover piece is provided with a first mounting hole, and one side of the top cover piece is provided with a first groove. The insulating plate is attached to one side of the top cover piece. A second mounting hole is formed in the insulating plate, a first boss is arranged on one side of the insulating plate, the periphery of the first boss is non-circular, and the first boss is arranged in the first groove in a penetrating mode. And a second groove is formed in one side of the insulating plate. The pole comprises a bottom plate and a pole body, one end of the pole is connected to the bottom plate, the other end of the pole body sequentially penetrates through the second mounting hole and the first mounting hole, the periphery of the bottom plate is non-circular, and the bottom plate is clamped in the second groove. The battery top cover is simple in processing structure and low in cost; and the terminal post is high in torsional strength. The power battery comprises a battery cell, a shell and the battery top cover, the battery cell is located in the shell, the top cover piece of the battery top cover blocks the opening of the shell, the structure is simple, and the structural strength is high.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery top cover and a power battery. Background Art

[0002] Typically, cylindrical batteries consist of a steel shell, a lower plastic, and a terminal. Because the terminal base plate, the retaining grooves in the lower plastic, and the retaining grooves in the steel shell are all circular, the terminal's torque resistance is relatively weak after riveting. For example, at a torque of only 2N, the terminal will become loose. Furthermore, after welding the terminal, the compressed sealing ring releases some of its compression due to heat, causing the terminal and steel shell to not fit as tightly as before. This further reduces the terminal's torque, for example, to only around 0.8N. For some batteries with high torque requirements, the current structure cannot meet these requirements.

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

[0004] The first object of the utility model is to provide a battery top cover with a simple processing structure and low cost; and the pole has high torsional strength.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] Battery cover, including:

[0007] A top cover sheet, wherein the top cover sheet is provided with a first mounting hole, and a first groove is provided on a side of the top cover sheet close to the battery cell, wherein the first groove is arranged in a closed loop along the circumference of the first mounting hole;

[0008] an insulating plate, the insulating plate being attached to a side of the top cover sheet close to the battery cell, the insulating plate being provided with a second mounting hole, the second mounting hole being opposite to the first mounting hole, the insulating plate being provided with a first boss on a side close to the top cover sheet, the first boss being arranged in a closed loop along the circumference of the second mounting hole, and the outer peripheral shape of the first boss being non-circular, the first boss being adapted to the shape of the first groove, the first boss being passed through the first groove, the insulating plate being provided with a second groove on a side facing away from the top cover sheet, the second groove being arranged in a closed loop along the circumference of the second mounting hole;

[0009] The pole includes a base plate and a column, one end of the pole is connected to the base plate, and the other end of the column is sequentially penetrated by the second mounting hole and the first mounting hole, the outer peripheral shape of the base plate is non-circular, the base plate is adapted to the shape of the second groove, and the base plate is clamped in the second groove.

[0010] As an optional technical solution for the battery top cover, the outer peripheral shape of the first boss is the same as the outer peripheral shape of the bottom plate.

[0011] As an optional technical solution for the battery top cover, the first boss is formed by setting a notch on the outer circumference of the ring.

[0012] As an optional technical solution for the battery top cover, there are two notches, which are respectively located at the radial ends of the ring.

[0013] As an optional technical solution for the battery top cover, a second boss is provided on the side of the top cover sheet facing away from the insulating plate, and the second boss is arranged in a closed loop along the circumference of the first mounting hole.

[0014] As an optional technical solution for the battery top cover, the battery top cover further includes an insulating ring, which is located on a surface of the top cover sheet facing away from the insulating plate and is sleeved on the outside of the column.

[0015] As an optional technical solution for the battery top cover, the insulating ring includes a first ring portion and a second ring portion, the diameter of the second ring portion is larger than the diameter of the first ring portion, one end of the first ring portion is connected to the second ring portion, and the other end is provided with the first mounting hole.

[0016] As an optional technical solution for the battery top cover, the pole further includes an upper cover, which is connected to the side of the pole away from the bottom plate, and the bottom surface of the upper cover abuts against the top surface of the second ring portion.

[0017] As an optional technical solution for the battery top cover, the insulating ring also includes a third ring portion, the diameter of the third ring portion is larger than the diameter of the second ring portion, the third ring portion is connected to the side of the second ring portion away from the first ring portion, and the third ring portion is arranged around the outer periphery of the upper cover.

[0018] A second object of the present invention is to provide a power battery that is simple to manufacture, low in cost, and has high structural strength.

[0019] To achieve this purpose, the present invention adopts the following technical solutions:

[0020] A power battery comprises a battery cell, a shell and the battery top cover, wherein the battery cell is located in the shell and the top cover is sealed at an opening of the shell.

[0021] Beneficial effects of the utility model:

[0022] The battery top cover provided by the present invention includes a top cover sheet, an insulating plate and a pole. The pole bottom plate is adapted to the shape of the second groove on the insulating plate and is non-circular. The second groove is provided on the bottom plate. When the bottom plate is twisted, the second groove can clamp the bottom plate, thereby preventing the pole from twisting relative to the insulating plate. The first boss on the insulating plate is adapted to the shape of the first groove on the top cover sheet and is non-circular. When the first boss is twisted, the first groove can clamp the first boss, thereby preventing the insulating plate from twisting relative to the top cover sheet. Therefore, the above-mentioned double clamping measures can prevent the pole from twisting, that is, increase the torsional strength of the pole, thereby increasing the structural strength of the battery top cover. In addition, the high torsional strength of the pole can be achieved by matching the shapes of the connection between the pole, the insulating plate and the top cover sheet, and the processing structure is simple and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a cross-sectional view of a battery top cover provided by an embodiment of the present utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the top cover of the battery provided by the embodiment of the utility model Figure 1 ;

[0025] Figure 3 This is a schematic diagram of the structure of the top cover of the battery provided by the embodiment of the utility model Figure 2 ;

[0026] Figure 4 This is a schematic diagram of the structure of the insulating plate of the battery top cover provided by the embodiment of the utility model Figure 1 ;

[0027] Figure 5 This is a schematic diagram of the structure of the insulating plate of the battery top cover provided by the embodiment of the utility model Figure 2 ;

[0028] Figure 6 This is a schematic structural diagram of a terminal post of a battery top cover provided by an embodiment of the present utility model;

[0029] Figure 7 The structure of the insulating ring of the battery top cover provided by the embodiment of the utility model is schematically shown. Figure 1 ;

[0030] Figure 8 The structure of the insulating ring of the battery top cover provided by the embodiment of the utility model is schematically shown. Figure 2 ;

[0031] Figure 9 It is a structural diagram of a power battery provided by an embodiment of the present utility model.

[0032] In the picture:

[0033] 10. Shell; 20. Battery cover;

[0034] 100, top cover; 110, first mounting hole; 120, first groove; 130, second boss; 200, insulating plate; 210, second mounting hole; 220, first boss; 221, notch; 230, second groove; 300, pole; 310, bottom plate; 320, column; 330, top cover; 400, insulating ring; 410, first ring portion; 420, second ring portion; 430, third ring portion. DETAILED DESCRIPTION

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0036] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0037] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0038] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0039] The battery top cover provided in this embodiment has a simple processing structure and low cost; and the pole has high torsional strength.

[0040] Specific as Figures 1 to 6 As shown, the battery top cover 20 includes a top cover sheet 100, an insulating plate 200, and a terminal 300. A first mounting hole 110 is provided on the top cover sheet 100. A first groove 120 is provided on the side of the top cover sheet 100 close to the battery cell. The first groove 120 is arranged in a closed loop along the circumference of the first mounting hole 110. The insulating plate 200 is attached to the side of the top cover sheet 100 close to the battery cell. A second mounting hole 210 is provided on the insulating plate 200. The second mounting hole 210 is opposite to the first mounting hole 110. A first boss 220 is provided on the side of the insulating plate 200 close to the top cover sheet 100. The first boss 220 is arranged in a closed loop along the circumference of the second mounting hole 210. The outer periphery of the first boss 220 is non-circular and matches the shape of the first groove 120. The first boss 220 passes through the first groove 120. A second groove 230 is defined on the side of the insulating plate 200 facing away from the top cover plate 100. The second groove 230 is arranged in a closed loop along the circumference of the second mounting hole 210. The pole 300 includes a base plate 310 and a column 320. One end of the pole 300 is connected to the base plate 310, and the other end of the column 320 is sequentially penetrated by the second mounting hole 210 and the first mounting hole 110. The outer periphery of the base plate 310 is non-circular, matching the shape of the second groove 230, and the base plate 310 is fixed to the second groove 230.

[0041] Based on the above design, the bottom plate 310 of the terminal 300 matches the shape of the second groove 230 on the insulating plate 200 and is non-circular. The second groove 230 is formed in the bottom plate 310. When the bottom plate 310 twists, the second groove 230 can lock the bottom plate 310, thereby preventing the terminal 300 from twisting relative to the insulating plate 200. The first boss 220 on the insulating plate 200 matches the shape of the first groove 120 on the top cover 100 and is non-circular. When the first boss 220 twists, the first groove 120 can lock the first boss 220, thereby preventing the insulating plate 200 from twisting relative to the top cover 100. Therefore, this double locking measure can prevent the terminal 300 from twisting, thereby increasing the torsional strength of the terminal 300 and, in turn, the structural strength of the battery top cover 20. Furthermore, the high torsional strength of the pole 300 can be achieved by matching the shapes of the connection points between the pole 300, the insulating plate 200 and the top cover plate 100, and the processing structure is simple and the cost is low.

[0042] Optionally, continue as Figure 4 and Figure 6 As shown, the outer peripheral shape of the first boss 220 is the same as the outer peripheral shape of the bottom plate 310 , which further increases the processing convenience of the battery top cover 20 .

[0043] Furthermore, the first boss 220 is formed by a notch 221 provided on the outer circumference of the ring. Since the first mounting hole 110, the second mounting hole 210 and the column 320 of the pole 300 are all circular in this embodiment, providing a substantially circular first boss 220 facilitates processing.

[0044] Furthermore, there are two notches 221 , and the two notches 221 are respectively located at two radial ends of the ring.

[0045] Of course, the number of the gaps 221 can also be one, three, four, etc.

[0046] Optionally, the first boss 220 with the notch 221 is formed by removing a sector-shaped portion from a circular ring.

[0047] Likewise, the bottom plate 310 with the notch 221 is formed by removing a sector-shaped portion from a circular disk.

[0048] In this embodiment, the first mounting hole 110 , the second mounting hole 210 and the pole 300 are all coaxially arranged.

[0049] Continue as Figure 1 and Figure 2 As shown, a second boss 130 is provided on the side of the top cover 100 facing away from the insulating plate 200. The second boss 130 is arranged in a closed loop along the circumference of the first mounting hole 110. The second boss 130 increases the structural strength of the top cover 100 around the first mounting hole 110, thereby increasing the structural strength of the battery top cover 20.

[0050] like Figure 7 and Figure 8 The battery top cover 20 further includes an insulating ring 400 , which is located on the surface of the top cover sheet 100 facing away from the insulating plate 200 and is sleeved on the outside of the column 320 , isolating the insulating pole 300 from the top cover sheet 100 and protecting the pole 300 .

[0051] In this embodiment, the insulating ring 400 and the insulating plate 200 are both plastic parts, and also have a certain function of sealing the battery top cover 20 .

[0052] Furthermore, the insulating ring 400 includes a first ring portion 410 and a second ring portion 420, the diameter of the second ring portion 420 is larger than the diameter of the first ring portion 410, one end of the first ring portion 410 is connected to the second ring portion 420, and the other end is penetrated by a first mounting hole 110, isolating the outer wall of the insulating column 320 from the inner wall of the first mounting hole 110, thereby increasing the insulation performance of the battery top cover 20; and increasing the connection strength between the top cover sheet 100 and the insulating plate 200, thereby increasing the structural strength of the battery top cover 20; and can also improve the sealing performance of the battery top cover 20.

[0053] Furthermore, continue as Figure 6As shown, the pole 300 also includes an upper cover 330, which is connected to the side of the pole 300 away from the bottom plate 310, and the bottom surface of the upper cover 330 abuts against the top surface of the second ring portion 420, thereby increasing the connection strength between the pole 300 and the insulating plate 200, further increasing the structural strength of the battery top cover 20; and increasing the sealing between the pole 300 and the insulating ring 400, thereby improving the sealing performance of the battery top cover 20.

[0054] Continue as Figure 7 and Figure 8 As shown, in order to protect the outer periphery of the upper cover 330 and further improve the sealing performance of the battery top cover 20, the insulating ring 400 also includes a third ring portion 430, the diameter of the third ring portion 430 is larger than the diameter of the second ring portion 420, the third ring portion 430 is connected to the side of the second ring portion 420 away from the first ring portion 410, and the third ring portion 430 is arranged around the outer periphery of the upper cover 330.

[0055] Continue as Figure 1 As shown, in this embodiment, the battery top cover 20 further includes a gasket, which is sleeved on the outside of the column 320 and clamped between the upper cover 330 and the second ring portion 420 , and the outer side of the gasket abuts against the inner side of the third ring portion 430 .

[0056] Continue as Figure 1 As shown, the battery top cover 20 also includes a sealing ring, which is sleeved on the outside of the column 320 , with the top surface of the sealing ring abutting against the bottom surface of the top cover piece 100 and the bottom surface of the first ring portion 410 , and the bottom surface of the sealing ring abutting against the top surface of the bottom plate 310 .

[0057] This embodiment also provides a power battery that is simple to process, low in cost, and has high structural strength.

[0058] Specific as Figure 9 As shown, the power battery includes a battery cell, a housing 10, and the battery top cover 20. The battery cell is located within the housing 10, and the top cover sheet 100 of the battery top cover 20 seals the opening of the housing 10. Because the battery top cover 20 achieves high torsional strength for the pole 300 through the shape fit at the connection between the pole 300, the insulating plate 200, and the top cover sheet 100, the manufacturing structure is simple and cost-effective, resulting in a simple and low-cost power battery. Furthermore, because the battery top cover 20 uses a double clamping mechanism, it can prevent the pole 300 from twisting, thereby increasing the torsional strength of the pole 300 and thus the structural strength of the battery top cover 20, ultimately resulting in a high structural strength power battery.

[0059] In this embodiment, the power battery is a cylindrical battery, and the top cover 100 and the housing 10 are integrally formed.

[0060] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Battery top cover, characterized in that, include: A top cover sheet (100), wherein a first mounting hole (110) is provided on the top cover sheet (100), a first groove (120) is provided on a side of the top cover sheet (100) close to the battery core, and the first groove (120) is arranged in a closed loop along the circumference of the first mounting hole (110); An insulating plate (200), the insulating plate (200) being attached to a side of the top cover sheet (100) close to the battery cell, the insulating plate (200) being provided with a second mounting hole (210), the second mounting hole (210) being opposite to the first mounting hole (110), the insulating plate (200) being provided with a first boss (220) on a side close to the top cover sheet (100), the first boss (220) being arranged in a closed loop along the circumference of the second mounting hole (210), and the outer peripheral shape of the first boss (220) being non-circular, the first boss (220) being adapted to the shape of the first groove (120), the first boss (220) being passed through the first groove (120), the insulating plate (200) being provided with a second groove (230) on a side facing away from the top cover sheet (100), the second groove (230) being arranged in a closed loop along the circumference of the second mounting hole (210); A pole (300) is provided, wherein the pole (300) comprises a base plate (310) and a column (320), one end of the pole (300) is connected to the base plate (310), and the other end of the column (320) is penetrated by the second mounting hole (210) and the first mounting hole (110) in sequence, the outer peripheral shape of the base plate (310) is non-circular, the base plate (310) is adapted to the shape of the second groove (230), and the base plate (310) is clamped in the second groove (230).

2. The battery top cover according to claim 1, characterized in that: The outer peripheral shape of the first boss (220) is the same as the outer peripheral shape of the bottom plate (310).

3. The battery top cover according to claim 2, characterized in that: The first boss (220) is formed by providing a notch (221) on the outer circumference of the ring.

4. The battery top cover according to claim 3, characterized in that: The number of the notches (221) is two, and the two notches (221) are respectively located at two radial ends of the ring.

5. The battery top cover according to claim 1, characterized in that: A second boss (130) is provided on the side of the top cover sheet (100) facing away from the insulating plate (200), and the second boss (130) is arranged in a closed loop along the circumference of the first mounting hole (110).

6. The battery top cover according to claim 1, characterized in that: The battery top cover further comprises an insulating ring (400), wherein the insulating ring (400) is located on a surface of the top cover sheet (100) facing away from the insulating plate (200) and is sleeved on the outside of the column (320).

7. The battery top cover according to claim 6, characterized in that: The insulating ring (400) comprises a first ring portion (410) and a second ring portion (420), wherein the diameter of the second ring portion (420) is larger than the diameter of the first ring portion (410), and one end of the first ring portion (410) is connected to the second ring portion (420), and the other end is provided with the first mounting hole (110).

8. The battery top cover according to claim 7, characterized in that: The pole (300) further includes an upper cover (330), the upper cover (330) being connected to the side of the pole (300) facing away from the bottom plate (310), and the bottom surface of the upper cover (330) abutting against the top surface of the second ring portion (420).

9. The battery top cover according to claim 8, characterized in that: The insulating ring (400) further includes a third ring portion (430), the diameter of the third ring portion (430) being greater than the diameter of the second ring portion (420), the third ring portion (430) being connected to the side of the second ring portion (420) facing away from the first ring portion (410), and the third ring portion (430) being arranged around the outer periphery of the upper cover (330).

10. A power battery, characterized in that: The battery comprises a battery cell, a shell (10) and a battery top cover (20) according to any one of claims 1 to 9, wherein the battery cell is located in the shell (10), and the top cover sheet (100) blocks the opening of the shell (10).

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