CN116387710A - Battery cover plate, battery and battery module - Google Patents

Abstract

The invention relates to the technical field of batteries, and discloses a battery cover, a battery and a battery module. The battery cover includes a connecting part, an upper plastic, a riveting block and a pole. Wherein, the circumferential outer edge of the side of the upper plastic facing away from the connection part is provided with a plurality of clamping parts at intervals; the circumferential outer edge of the side of the riveting block facing the upper plastic is provided with a plurality of matching parts. In the battery cover plate with this structure, the riveting block is clip-fitted with a plurality of snap-fitting portions through a plurality of matching portions on its circumferential outer edge, so as to fix the riveting block on the upper plastic in the circumferential direction and prevent the pole from rotating. The riveting block cancels the groove near the pole hole, and the anti-rotation effect is achieved through the cooperation of multiple matching parts scattered on its outer edge and the snap-in part to ensure the thickness of the riveting block, thereby increasing the welding of the busbar The depth prevents welding through the riveting block and ensures the performance of batteries and battery modules. At the same time, the welding depth of the bus bar is increased, which further increases the actual flow area of the riveting block and the bus bar, so as to utilize the electrical performance of the battery cell more efficiently.

Description

Battery cover plate, battery and battery module

technical field

The invention relates to the technical field of batteries, in particular to a battery cover, a battery and a battery module.

Background technique

The battery cover plate includes structures such as connecting piece, upper plastic, riveting block, pole and explosion-proof valve, and pole holes are arranged on the connecting piece and the upper plastic. When the battery cover is assembled, the upper plastic and the riveting block are sequentially stacked on the connecting piece, and the pole is fixedly connected with the riveting block after passing through the connecting piece and the pole hole on the upper plastic from top to bottom. In order to prevent the pole from rotating, a groove is provided on the contact surface between the middle part of the riveting block and the upper plastic. The depth of the groove is relatively deep, which causes the actual thickness of the riveting block to become thinner. When the bus bar is connected through the bus bar, the riveting block has a greater risk of welding through, which will damage the battery and the battery module and affect the performance of the battery and the battery module.

Contents of the invention

In view of this, the present invention provides a battery cover plate, a battery and a battery module to solve the problem in the prior art that the matching structure of the rivet block and the upper plastic is likely to cause the rivet block to be welded through. The riveting block of the present invention cancels the groove near the pole hole, and the anti-rotation effect is achieved through the cooperation of a plurality of matching parts scattered on its outer edge with the clamping parts, so as to ensure the thickness of the riveting block and increase the confluence The welding depth of the row can prevent welding through the riveting block and ensure the performance of the battery and battery module. At the same time, the welding depth of the bus bar is increased, which further increases the actual flow area of the riveting block and the bus bar, so as to utilize the electrical performance of the battery cell more efficiently.

In a first aspect, the present invention provides a battery cover, including a connecting part, an upper plastic, a riveting block and a pole. Wherein, the connecting part is provided with a pole hole; the upper plastic is arranged on the connecting part; the upper plastic is provided with a pole hole, and the circumferential outer edge of the side of the upper plastic facing away from the connecting part is provided with a plurality of clamping parts at intervals; The riveting block is set on the upper plastic; the riveting block is provided with a pole hole, and the circumferential outer edge of the riveting block facing the upper plastic is provided with a plurality of matching parts, and the snap-fitting parts and the matching parts are snap-fitted to connect the riveting block fixed on the upper plastic; the pole passes through the connection part and the pole hole on the upper plastic in turn, and then connects with the riveting block.

The riveting block is clamped and fitted with a plurality of clamping parts through a plurality of matching parts on its circumferential outer edge, so as to fix the riveting block on the upper plastic in the circumferential direction, so as to prevent the pole from rotating. The riveting block cancels the groove near the pole hole, and the anti-rotation effect is achieved through the cooperation of multiple matching parts scattered on its outer edge and the snap-in part to ensure the thickness of the riveting block, thereby increasing the welding of the busbar The depth prevents welding through the riveting block and ensures the performance of batteries and battery modules. At the same time, the welding depth of the bus bar is increased, which further increases the actual flow area of the riveting block and the bus bar, so as to utilize the electrical performance of the battery cell more efficiently.

In an optional embodiment, the engaging part is a boss part, the matching part is a groove part, and the groove part is clipped outside the boss part.

A plurality of grooves are scattered on the circumferential outer edge of the riveting block, and the plurality of grooves cooperate with the bosses to prevent rotation. The height of the boss part, so that the depth of the groove part can be reduced accordingly, and the groove part is distributed on the outer edge of the riveting block away from the pole hole in the middle, so as to ensure the thickness of the riveting block and prevent the riveting block when welding the busbar. Welded through. The groove part is set on the riveting block, and the riveting block can be directly integrally injection-molded, and then the groove part is punched and formed on the riveting block, and the making of the groove part is simple and convenient.

In an optional embodiment, the boss portion is a solid structure. The boss part of the solid structure has high strength and good anti-rotation performance. The use of a small height boss part can ensure the anti-rotation effect between the upper plastic and the riveting block, so that the depth of the groove on the riveting block can be further reduced accordingly , increase the actual thickness of the riveting block and the welding depth of the busbar to prevent welding through the riveting block.

In an optional embodiment, the boss portion is in the shape of a rectangular block, and the groove portion is in the shape of a rectangular groove. The riveting block and the upper plastic are convenient to manufacture and the manufacturing process is simple, so as to reduce the manufacturing cost of the riveting block and the upper plastic.

In an optional embodiment, the length of the boss extending from the outer edge of the upper plastic to the inner side of the upper plastic is L1, the width of the boss is W1, and the height of the boss is H1, 0.5mm≤L1≤ 5mm, 0.2mm≤W≤2mm, 0.5mm≤H1≤2mm; the length of the groove is L2, the width of the groove is W2, the depth of the groove is H2, 0.5mm≤L2≤5mm, 0.2mm≤ W2≤2mm, 0.5mm≤H2≤2mm.

The size of the groove part is slightly larger than the size of the boss part, so that the boss part can just be plugged into the groove part; at the same time, the size of the groove part and the boss part can reduce the concave part under the premise of ensuring the anti-rotation effect within this range. The depth of the groove ensures the welding depth of the riveting block and prevents the riveting block from being welded through.

In an optional embodiment, the cross-section of the upper plastic is rectangular, and a plurality of clamping parts are arranged at intervals around the upper plastic; adapt. A plurality of clamping parts are dispersedly arranged around the upper plastic, and cooperate with the groove parts to achieve a good anti-rotation effect.

In an optional embodiment, a clamping part is provided around the upper plastic, and each clamping part is located in the middle of the side part of the upper plastic, which has a good anti-rotation effect and a simple structure.

In an optional embodiment, an enclosure is provided on the outer periphery of the boss, a limiting step is provided on the outer periphery of the riveting block, and the limiting step is clamped on the enclosure;

Or, the outer side of the boss part is surrounded by a surrounding part, and the surrounding part surrounds the outer wall of the riveting block.

In order to prevent the riveting block from moving relative to the upper plastic, the pole and the riveting block are riveted and fixed, so that the pole is stably maintained on the upper plastic and the connecting part.

In a second aspect, the present invention provides a battery, including any one of the above-mentioned battery cover plates. Because the battery includes the above-mentioned battery cover, which has the same effect as the battery cover, it will not be repeated here.

In a third aspect, the present invention provides a battery module, including the above-mentioned battery. Since the battery module includes the above-mentioned battery cover, which has the same effect as the battery cover, it will not be repeated here.

Description of drawings

In order to more clearly illustrate the specific implementation of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the specific implementation or description of the prior art. Obviously, the accompanying drawings in the following description The drawings show some implementations of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

Fig. 1 is a schematic diagram of the three-dimensional structure of the upper plastic in a battery cover according to an embodiment of the present invention;

Fig. 2 is a top view of the upper plastic in a battery cover according to an embodiment of the present invention;

Fig. 3 is the sectional view of A-A direction of Fig. 2;

Fig. 4 is a bottom view of the upper plastic in a battery cover according to an embodiment of the present invention;

Fig. 5 is a three-dimensional structural schematic diagram of a riveted block in a battery cover according to an embodiment of the present invention;

Fig. 6 is a top view of a riveting block in a battery cover according to an embodiment of the present invention;

Fig. 7 is the sectional view of B-B direction of Fig. 6;

Fig. 8 is a bottom view of a riveting block in a battery cover according to an embodiment of the present invention;

Fig. 9 is a perspective structural schematic diagram of the cooperation of the upper plastic, the riveting block and the pole in a battery cover according to an embodiment of the present invention;

Fig. 10 is an exploded view of the connection part and the upper plastic in a battery cover according to an embodiment of the present invention;

Fig. 11 is an exploded view of the connection part and the upper plastic in a battery cover according to an embodiment of the present invention.

Explanation of reference signs:

1. Connecting part; 101. Limiting groove; 2. Upper plastic; 201. Clamping part; 202. Surrounding part; 203. Limiting protruding part; 3. Riveting block; 4. Pole.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

The battery cover plate in the related art includes a connecting part 1, an upper plastic 2, a riveting block 3 and a pole. The connecting part 1 and the upper plastic 2 are provided with pole holes, and the upper plastic 2 is fixedly arranged on the connecting part 1 in a circumferential direction. , the side of the upper plastic 2 facing away from the connecting part 1 is provided with two protrusions, and the corresponding position of the riveting block 3 is provided with a groove, and the protrusions are inserted into the groove to prevent the riveting block 3 from rotating relative to the upper plastic 2 , the pole is fixedly connected with the riveting block 3, so as to prevent the pole from twisting. The convex part is formed by integral stamping, which is in the shape of a hollow cylinder. In order to ensure that the convex part has sufficient strength when subjected to torque, the diameter of the convex part cannot be too thin, and the height of the convex part increases correspondingly. The depth of the groove of the riveting block 3 is increased, resulting in the actual thickness of the riveting block 3 being thinner, resulting in the risk of welding through the riveting block 3 .

Embodiments of the present invention will be described below with reference to FIG. 1 to FIG. 11 .

According to an embodiment of the present invention, on the one hand, a battery cover is provided, which includes a connecting part 1 , an upper plastic 2 , a riveting block 3 and a pole 4 .

Among them, the connection part 1 is provided with a pole hole; the upper plastic 2 is provided on the connection part 1; A plurality of clamping parts 201; the riveting block 3 is provided with a pole hole and the riveting block 3 is arranged on the upper plastic 2; the circumferential outer edge of the riveting block 3 facing the upper plastic 2 is provided with a plurality of matching parts 301, the clamping The connecting part 201 and the mating part 301 snap fit to fix the riveting block 3 on the upper plastic 2 in the circumferential direction;

For the battery cover plate of this structure, the riveting block 3 is clamped and fitted with a plurality of clamping portions 201 through a plurality of matching parts 301 on its circumferential outer edge, so as to fix the riveting block 3 on the upper plastic 2 in the circumferential direction to prevent extreme damage. The column turns. The riveting block 3 cancels the groove near its pole hole, and the anti-rotation effect is achieved through the cooperation of a plurality of matching parts 301 scattered on its outer edge and the clamping part 201, so as to ensure the thickness of the riveting block 3, thereby increasing The welding depth of the busbar prevents the riveting block 3 from being welded through, so as to ensure the performance of the battery and the battery module. At the same time, the welding depth of the busbar is increased, which further increases the actual flow area of the riveting block 3 and the busbar, so as to utilize the electrical performance of the battery cell more efficiently.

As shown in FIG. 1 and FIG. 5 , the clamping part 201 is a boss part, and the matching part 301 is a groove part, and the groove part is clipped outside the boss part to prevent the riveting block 3 from rotating relative to the upper plastic 2 . A plurality of grooves are scattered on the circumferential outer edge of the riveting block 3, and the plurality of grooves cooperate with the bosses to prevent rotation. The height of each boss portion is small, so that the depth of the groove portion can be reduced accordingly, and the groove portion is distributed on the outer edge of the riveting block 3 away from the pole hole in the middle, so as to ensure the thickness of the riveting block 3 and prevent welding confluence The riveting block 3 is welded through during the row. If a boss is set on the side of the riveting block 3 facing the upper plastic 2, and a groove is set on the side of the upper plastic 2 facing the riveting block 3, then the boss at the bottom of the riveting block 3 needs to be welded on the riveting block 3, or the riveting can be removed by milling. The large surface area at the bottom of the block 3 is required to form a boss of a desired shape, and the processing technology is cumbersome and the manufacturing cost is high. The riveting block 3 of the present invention is provided with a groove portion, and after the riveting block 3 is directly integrally injection-molded, the groove portion is stamped and formed on the riveting block 3, and the groove portion is simple and convenient to manufacture.

In other embodiments, the clamping part 201 can be in the shape of a groove, and the matching part 301 can be in the shape of a boss. As long as the clamping part 201 and the matching part 301 can be clamped and matched, the riveting block 3 can be circumferentially fixed on the upper plastic 2 That's it.

Optionally, in some embodiments, referring to FIG. 1 , the boss portion is a solid structure. The boss part of the solid structure has high strength and good anti-rotation performance, and the use of a small height boss part can ensure the anti-rotation effect of the upper plastic 2 and the riveting block 3, so that the groove on the riveting block 3 can be further reduced accordingly Increase the actual thickness of the riveting block 3 and the welding depth of the busbar to prevent the riveting block 3 from being welded through.

In other embodiments, the boss part can also be a hollow structure, and a plurality of boss parts are scattered on the circumferential outer edge of the upper plastic 2, and cooperate with a plurality of groove parts to ensure its anti-rotation effect, so as to prevent the boss part from being subjected to torque. Just break.

Optionally, both the riveting block 3 and the upper plastic 2 are formed by integral injection molding, the boss part is arranged on the outer edge of the riveting block 3, and the groove part is formed on the outer edge of the riveting block 3 by stamping, which is convenient for making the riveting block 3 and the upper part. The mold of the plastic 2, the riveting block 3 and the upper plastic 2 are easy to manufacture, and the manufacturing process is simple, so as to reduce the manufacturing cost of the riveting block 3 and the upper plastic 2.

Referring to FIG. 1 to FIG. 3 , the boss portion is in the shape of a rectangular block, and correspondingly, referring to FIG. 5 to FIG. 7 , the groove portion is in the shape of a rectangular groove. Both the boss part and the groove part are rectangular, which is convenient for making and forming.

As shown in Figure 2 and Figure 3, the length of the boss extending from the outer edge of the upper plastic 2 toward the inner side of the upper plastic 2 is L1, the width of the boss is W1, and the height of the boss is H1, 0.5mm≤L1 ≤5mm, 0.2mm≤W≤2mm, 0.5mm≤H1≤2mm; as shown in Figure 6 and Figure 7, the length of the groove is L2, the width of the groove is W2, and the depth of the groove is H2, 0.5mm≤L2≤5mm, 0.2mm≤W2≤2mm, 0.5mm≤H2≤2mm, the size of the groove part is slightly larger than the size of the boss part, so that the boss part can just be plugged into the groove part; The size of the portion and the boss portion can reduce the depth of the groove portion under the premise of ensuring the anti-rotation effect within this range, so as to ensure the welding depth of the riveting block 3 and prevent the riveting block 3 from being welded through.

As shown in Figures 1 to 8, the cross-section of the upper plastic 2 is rectangular, and a plurality of clamping parts 201 are arranged at intervals around the upper plastic 2; The position is adapted to the clamping part 201 . That is to say, a plurality of boss parts are dispersedly arranged around the upper plastic 2, and the anti-rotation effect of cooperating with the groove parts is good. The outer edges of the four corners of the upper plastic 2 and the riveting block 3 are provided with arc-shaped chamfers.

Optionally, a boss is provided around the upper plastic 2, each boss is located in the middle of the side of the upper plastic 2, and four bosses are symmetrically arranged in pairs, with good anti-rotation effect and simple structure.

Referring to FIG. 1 and FIG. 3 , an enclosure 202 is provided on the outer periphery of the boss portion, and a limiting step 302 is provided on the outer periphery of the riveting block 3 , and the limiting step 302 is clamped on the enclosure 202 . The riveting block 3 is installed on the upper plastic 2, and the limit step part 302 is clamped on the enclosure part 202 to prevent the riveting block 3 from moving relative to the upper plastic 2, and the pole and the riveting block 3 are riveted and fixed, so that the pole is stably maintained On the plastic 2 and the connecting part 1. The groove portion of the riveting block 3 is located inside the limiting step portion 302 thereof.

In other embodiments, the outer side of the boss portion is surrounded by a surrounding wall 202 , the outer wall of the riveting block 3 is flush, and the surrounding wall 202 surrounds the outer wall of the riveting block 3 to limit the position of the riveting block.

As shown in Figure 4, Figure 10 and Figure 11, the side of the upper plastic 2 facing the connecting part 1 is provided with a limiting protrusion 203, and the side of the connecting part 1 facing the upper plastic 2 is provided with a limiting groove 101, and the limiting protrusion 203 snaps into the limiting groove 101 so as to fix the upper plastic 2 on the connecting portion 1 circumferentially. The upper plastic 2 and the connecting part 1 are fixed through a concave-convex matching structure, the matching structure is simple, and the anti-rotation effect is good.

Specifically, there are two limiting protrusions 203 and two limiting grooves 101, and the two limiting protrusions 203 are diagonally distributed on both sides of the pole hole of the upper plastic 2. The grooves 101 are diagonally distributed on both sides of the pole hole of the connecting part 1 . The limiting protruding portion 203 protrudes from the lower surface of the upper plastic 2 , the limiting protruding portion 203 is in the shape of a hollow cylinder, and the limiting groove 101 is a circular groove. A shallow groove is provided on the upper surface of the connecting part 1, and the bottom of the upper plastic 2 is embedded in the shallow groove.

Optionally, the connecting part 1 is a light aluminum sheet.

The battery cover also includes an explosion-proof valve, a sealing ring and a lower plastic. The explosion-proof valve is arranged on the connection part 1, the lower plastic is arranged on the bottom of the light aluminum sheet, and the sealing ring is arranged between the pole and the lower plastic sheet, and the sealing ring is used to ensure the sealing effect of the battery.

When installing the battery cover, fix the lower plastic on the bottom of the light aluminum sheet, set the sealing ring in the pole hole on the light aluminum sheet, set the upper plastic on the upper surface of the light aluminum sheet, and clamp the limit protrusion of the upper plastic on the In the limit groove, the riveting block 3 is arranged on the upper plastic 2, the groove part of the riveting block 3 is clamped outside the boss part of the upper plastic 2, and the pole passes through the lower plastic, light aluminum sheet, After the plastic 2 and the pole hole of the riveting block 3 are riveted with the riveting block 3 .

According to an embodiment of the present invention, on the other hand, there is also provided a battery, which includes the above-mentioned battery cover plate, casing and pole assembly. The pole group is arranged in the casing, and the battery cover is arranged on the opening of the casing.

For the battery with this structure, the upper cover plate plays an anti-rotation effect through the cooperation of multiple matching parts scattered on its outer edge and the clamping part to ensure the thickness of the riveting block, thereby increasing the welding depth of the busbar and preventing welding. Wear riveted blocks to ensure battery performance.

According to an embodiment of the present invention, on the other hand, a battery module is also provided, including the above-mentioned battery.

For the battery module with this structure, the thickness of the upper riveting block can be guaranteed under the fisherman's gull, thereby increasing the welding depth of the busbar when assembling the battery module, preventing welding through the riveting block, and ensuring battery performance.

Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention. within the bounds of the requirements.

Claims (10)

1. A battery cover, characterized in that it comprises: The connecting part is provided with pole holes; The upper plastic is arranged on the connecting part; the upper plastic is provided with a pole hole, and the circumferential outer edge of the side of the upper plastic facing away from the connecting part is provided with a plurality of clamping parts at intervals; The riveting block is arranged on the upper plastic; the riveting block is provided with a pole hole, and the circumferential outer edge of the riveting block facing the upper plastic is provided with a plurality of matching parts, and the clamping part snap fit with the matching portion to circumferentially fix the riveting block on the upper plastic; The pole is connected to the riveting block after sequentially passing through the connecting portion and the pole hole on the upper plastic. 2. The battery cover according to claim 1, wherein the engaging portion is a boss portion, the matching portion is a groove portion, and the groove portion is clipped outside the boss portion . 3. The battery cover according to claim 2, wherein the boss portion is a solid structure. 4 . The battery cover according to claim 2 or 3 , wherein the boss portion is in the shape of a rectangular block, and the groove portion is in the shape of a rectangular groove. 5 . The battery cover according to claim 4 , wherein the length of the boss extending from the outer edge of the upper plastic toward the inner side of the upper plastic is L1, and the width of the boss is W1, the height of the boss part is H1, 0.5mm≤L1≤5mm, 0.2mm≤W≤2mm, 0.5mm≤H1≤2mm; The length of the groove is L2, the width of the groove is W2, the depth of the groove is H2, 0.5mm≤L2≤5mm, 0.2mm≤W2≤2mm, 0.5mm≤H2≤2mm . 6. The battery cover according to any one of claims 1 to 3, characterized in that, the cross-section of the upper plastic is rectangular, and a plurality of the clamping parts are arranged at intervals around the upper plastic; The shape of the riveting block is adapted to the upper plastic, and the setting position of the matching part is adapted to the clamping part. 7 . The battery cover according to claim 6 , wherein one clamping portion is provided around the upper plastic, and each clamping portion is located in the middle of the side portion of the upper plastic. 8 . 8. The battery cover plate according to claim 2 or 3, characterized in that, the outer side of the boss part is surrounded by an enclosure part, and the outer periphery of the riveting block is provided with a limit step part, and the limit step part catches connected to the enclosure; Or, the outer side of the boss part is surrounded by a surrounding part, and the surrounding part surrounds the outer side wall of the riveting block. 9. A battery, characterized by comprising the battery cover plate according to any one of claims 1-8. 10. A battery module, comprising the battery according to claim 9.

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