CN105576160B - Power battery and power battery top cover - Google Patents

Abstract

The invention provides a power battery and a power battery top cover. The top cover of the power battery includes: a top cover sheet provided with mounting holes; poles installed in the mounting holes of the top cover sheet in an insulated and sealed manner; and connecting aluminum blocks fixedly connected to corresponding poles. Wherein, a first recess is provided on the surface of the top cover sheet opposite to the connection aluminum block; a corresponding second recess is provided on the surface of the connection aluminum block opposite to the top cover sheet. The power battery top cover also includes: at least one insulator, the two sides of each insulator are respectively accommodated and fixed in the corresponding first recess and the corresponding second recess, so as to be fixedly connected between the top cover sheet and the corresponding connecting aluminum block and Space the top cover sheet from the corresponding connecting aluminum block. The power battery includes the above-mentioned power battery top cover. The power battery and the top cover of the power battery of the present invention can reduce the height of the top cover sheet and the pole, and can improve the anti-rotation effect between the pole and the connecting aluminum block.

Description

Power battery and power battery top cover

technical field

The invention relates to the field of energy storage devices, in particular to a power battery and a power battery top cover.

Background technique

At present, the design of power battery structural parts is relatively complicated, especially the top cover structure. Considering the safety of the battery core, many top covers have added high-temperature-resistant insulating materials at the positions of the positive and negative poles to insulate the top cover from the poles, such as adding ceramics to the negative pole to ensure high-temperature insulation.

And these parts are basically circular at present, sleeved on the pole. We know that ceramic materials and glass materials are very brittle and easy to fracture. So basically a thickness of 3mm or more is required to ensure strength. Moreover, for ring-shaped ceramic parts, the upper and lower surfaces need to be flat enough to resist compression well, which often requires post-processing grinding.

Based on the above, the cost will be too high, which is not conducive to the mass production of power batteries, and the height of the poles will be too high, which will increase the height of the battery cells and greatly reduce the utilization space of the module.

Moreover, most of the top covers of power batteries currently use a riveted structure, and the aluminum block of the external electrode is not integrated with the pole of the internal battery ear. In this way, the aluminum block of the external electrode will rotate, and a structure is required. anti-rotation. The traditional structure is that the external aluminum block is coated with plastic, and the plastic is embedded in the counterbore of the top cover sheet to prevent rotation. But this effect is not very ideal. The first is due to the limited strength of the plastic, and the second is that the plastic cannot guarantee anti-rotation under high temperature.

Contents of the invention

In view of the problems in the background technology, the object of the present invention is to provide a power battery and a top cover of the power battery, which can reduce the height of the top cover sheet and the pole.

Another object of the present invention is to provide a power battery and a top cover of the power battery, which can improve the anti-rotation effect between the pole and the connecting aluminum block.

In order to achieve the above object, in the first aspect, the present invention provides a power battery top cover, which includes: a top cover sheet provided with a mounting hole; a pole, insulated and sealed in the mounting hole of the top cover sheet; and a connection The aluminum block is fixedly connected to the corresponding pole. Wherein, a first recess is provided on the surface of the top cover sheet opposite to the connection aluminum block; a corresponding second recess is provided on the surface of the connection aluminum block opposite to the top cover sheet. The power battery top cover also includes: at least one insulator, the two sides of each insulator are respectively accommodated and fixed in the corresponding first recess and the corresponding second recess, so as to be fixedly connected between the top cover sheet and the corresponding connecting aluminum block and Space the top cover sheet from the corresponding connecting aluminum block.

In order to achieve the above object, in a second aspect, the present invention provides a power battery, which includes the power battery top cover according to the first aspect of the present invention.

The beneficial effects of the present invention are as follows:

In the power battery top cover of the present invention, the two sides of each insulator are respectively accommodated and fixed on the corresponding first concave portion and the corresponding second concave portion on the opposite surface of the top cover sheet and the connecting aluminum block, so as to be fixedly connected to the top cover sheet And between the corresponding connecting aluminum blocks and make the top cover sheet and the corresponding connecting aluminum block spaced apart, thereby the height of the top cover sheet and the pole can be reduced to improve the energy storage device (such as the power battery and the power battery) using the power battery top cover. The space utilization rate of its module) and reduce the height of the energy storage device, so that the anti-rotation effect between the pole and the connecting aluminum block can be improved, and the power battery top cover of the present invention can also simplify the structure, improve reliability, and greatly cut costs.

Description of drawings

Fig. 1 is a perspective view of an embodiment of a power battery top cover according to the present invention;

Fig. 2 is a perspective view of another embodiment of the power battery top cover according to the present invention;

Fig. 3 is the top view of the embodiment shown in Fig. 1;

Fig. 4 is a sectional view along the X-X line of Fig. 3;

Fig. 5 is an enlarged view of the circled part of Fig. 4;

Figure 6 is a top view of the embodiment shown in Figure 2;

Fig. 7 is a sectional view along the Y-Y line of Fig. 6;

FIG. 8 is an enlarged view of the circled portion in FIG. 7 .

Wherein, the reference signs are explained as follows:

1 Top cover piece 22 Upper boss

11 Mounting hole 23 Bottom boss

12 Pressure relief valve hole 3 Connecting aluminum block

13 Injection hole 31 Second recess

14 First recess 4 Insulator

2 Pole 5 Seal

21 Body

Detailed ways

The power battery and the top cover of the power battery according to the present invention will be described in detail below with reference to the accompanying drawings.

Firstly, the power battery top cover according to the first aspect of the present invention will be described.

Referring to Figures 1 to 8, the power battery top cover according to the first aspect of the present invention includes: a top cover sheet 1 provided with a mounting hole 11; a pole 2 installed in the mounting hole 11 of the top cover sheet 1 in an insulated and sealed manner; and The aluminum block 3 is connected and fixedly connected to the corresponding pole 2 . Wherein, a first recess 14 is provided on the surface of the top cover sheet 1 opposite to the connection aluminum block 3 ; a corresponding second recess 31 is provided on the surface of the connection aluminum block 3 opposite to the top cover sheet 1 . The power battery top cover also includes: at least one insulator 4, the two sides of each insulator 4 are respectively accommodated and fixed in the corresponding first recess 14 and the corresponding second recess 31, so as to be fixedly connected to the top cover sheet 1 and the corresponding connection The top cover sheet 1 and the corresponding connecting aluminum block 3 are spaced apart between the aluminum blocks 3 .

In the power battery top cover of the present invention, the two sides of each insulator 4 are respectively accommodated and fixed on the corresponding first concave portion 14 and the corresponding second concave portion 31 on the opposite surface of the top cover sheet 1 and the connecting aluminum block 3, so as to fix It is connected between the top cover sheet 1 and the corresponding connection aluminum block 3 and the top cover sheet 1 and the corresponding connection aluminum block 3 are spaced apart, so that the height of the top cover sheet 1 and the pole 2 can be reduced to improve the use of the power battery The space utilization rate of the energy storage device (such as the power battery and its module) of the top cover and the height of the energy storage device can be reduced, so that the anti-rotation effect between the pole 2 and the connecting aluminum block 3 can be improved, and the power of the present invention The battery top cover can also simplify the structure, improve reliability, and greatly reduce costs.

In an embodiment of the power battery top cover according to the first aspect of the present invention, each insulator 4 is small cylindrical (refer to FIG. 1 , FIG. 3 to FIG. 5 ) or spherical (refer to FIG. 2 , FIG. 6 to FIG. 8 ). The molding process of the small cylindrical or spherical insulator 4 is easy to implement and has high strength so as to improve the anti-rotation effect of the pole 2 and the connecting aluminum block 3 . In an embodiment of the power battery top cover according to the first aspect of the present invention, referring to FIG. 1 to FIG. 4 , FIG. 6 , and FIG.

In an embodiment of the power battery top cover according to the first aspect of the present invention, referring to FIGS. 1 , 2 , 4 , 5 , 7 , and 8 , the pole 2 may include a body portion 21 .

In an embodiment of the power battery top cover according to the first aspect of the present invention, referring to Fig. 4 , Fig. 5 , Fig. 7 , and Fig. 8 in conjunction with Fig. 1 and Fig. 2 , the pole 2 may further include: an upper boss 22 located Above and connected to the body portion 21 , the connecting aluminum block 3 is sheathed on the upper boss 22 of the pole 2 in a concave-convex manner.

In an embodiment of the power battery top cover according to the first aspect of the present invention, referring to FIG. 4 , FIG. 5 , FIG. 7 , and FIG. 8 in conjunction with FIG. 1 and FIG. 2 , the pole 2 may also include a The lower boss 23 connected to the body part 21 . The lower boss 23 can be used for fixedly arranging the conductive connecting piece.

In an embodiment of the power battery top cover according to the first aspect of the present invention, the position of the insulator 4 can be close to the pole 2 between the top cover sheet 1 and the connecting aluminum block 3 .

In an embodiment of the power battery top cover according to the first aspect of the present invention, the insulator 4 can be made of ceramic or mica.

In an embodiment of the power battery top cover according to the first aspect of the present invention, referring to Fig. 1, Fig. 2, Fig. 4, Fig. 5, Fig. 7, Fig. 8, the insulator 4 can be multiple (shown in the drawings In an example, there are two insulators 4 , but the present invention is not limited thereto), and the plurality of insulators 4 are disposed between the top cover sheet 1 and the corresponding connecting aluminum block 3 around the corresponding pole 2 . In one embodiment, referring to FIG. 1 , FIG. 2 , FIG. 4 , FIG. 5 , FIG. 7 , and FIG. 8 , the plurality of insulators 4 are disposed on the top cover sheet 1 and the Correspondingly connect between the aluminum blocks 3 .

In an embodiment of the power battery top cover according to the first aspect of the present invention, the pole 2 may include at least one of a positive pole and a negative pole. In the example shown in the drawings, the poles 2 each include a positive pole and a negative pole, as shown in FIG. 1 and FIG. 2 .

In an embodiment of the power battery top cover according to the first aspect of the present invention, the pole 2 may include a positive pole and a negative pole, and the insulator 4 corresponding to the negative pole is made of a small cylindrical ceramic material; The insulator 4 is made of small cylindrical mica.

In an embodiment of the power battery top cover according to the first aspect of the present invention, referring to Fig. 1, Fig. 2, Fig. 4, Fig. 5, Fig. 7, and Fig. 8, the power battery top cover may further include: an insulating sealing ring 5, It is sleeved on the pole 2 and accommodated in the mounting hole 11 of the top cover 1 , so that the top cover 1 and the pole 2 are sealed and insulated. Here, it should be noted that the sealing and insulation between the top cover sheet 1 and the pole 2 is not limited to the use of the insulating sealing ring 5 , and any other components known in the art can be used.

The power battery according to the second aspect of the present invention will be described below.

The power battery according to the second aspect of the present invention includes the top cover of the power battery according to the first aspect of the present invention.

Claims (6)

1. a kind of power battery top cover, comprising:

Coping plate is provided with mounting hole；

Pole, insulated enclosure are mounted in the mounting hole of coping plate；And

Aluminium block is connected, corresponding pole is fixedly connected on；

The first recess portion is arranged on the surface opposite with connection aluminium block in coping plate；

Corresponding second recess portion is provided on connection aluminium block and the opposite surface of coping plate；

It is characterized in that,

The power battery top cover further include:

Multiple insulators, the two sides of each insulator accommodate respectively is fixed on corresponding first recess portion and corresponding second recess portion, with It is fixedly connected between coping plate and corresponding connection aluminium block and make coping plate and corresponding connection aluminium block to be spaced apart；

Each insulator is in roundlet cylindricality or spherical shape；

The multiple insulator is arranged between coping plate and corresponding connection aluminium block around corresponding pole.

2. power battery top cover according to claim 1, which is characterized in that pole includes:

Body part；And

Convex platform is located above body part and connect with body part, and connection aluminium block is sheathed on the upper of pole in a manner of male-female engagement Boss.

3. power battery top cover according to claim 1, which is characterized in that each insulator is ceramics or mica material.

4. power battery top cover according to claim 1, which is characterized in that the multiple insulator surrounds corresponding pole It is circumferentially equiangularly spaced to be arranged between coping plate and corresponding connection aluminium block.

5. power battery top cover according to claim 1, which is characterized in that power battery top cover further include:

Insulated enclosure circle, be set on pole and and be contained in the mounting hole of coping plate so that between coping plate and pole It seals and insulate.

6. a kind of power battery, which is characterized in that including power battery top cover according to any one of claims 1-5.