CN217086803U - Power battery and power battery assembly - Google Patents

Abstract

The utility model provides a power battery and a power battery assembly, wherein the power battery comprises: a casing with an accommodating space inside, and at least one end of the casing is open; and a top cover, which is covered on the the opening of the casing; the top cover includes a cover plate and a pole, wherein the pole is arranged on the cover plate, and a surface on one side of the cover plate has a first surface and a second surface, In the longitudinal direction of the casing, at least a part of the part of the pole exposed to the outside of the power battery is located within a range defined by the first surface and the second surface.

Description

A kind of power battery and power battery assembly

technical field

The utility model relates to a power battery and a power battery assembly.

Background technique

With the rapid development of energy storage technology and electric vehicle technology, the application of more environmentally friendly battery power sources is becoming more and more extensive, and the demand for batteries with large capacity, high battery life and small size is becoming more and more stringent.

Power batteries in the prior art mainly include square batteries and round batteries. Wherein, the prismatic battery mainly includes a casing, a cover plate and a pole arranged on the cover plate. The cover plate is usually in the shape of a flat plate, and the poles are protruded on the cover plate. The structure of this square battery has the following disadvantages: the arrangement of the poles will increase the overall size of the power battery in one direction, and its space utilization rate is low when it is installed into a battery pack of the same size; as shown in Figure 1, When the poles 30 of the power battery are electrically connected through the connecting piece 10, the size occupied by the power battery 20 during installation will be further increased, and the power battery 20 will generate heat during operation, so a heat sink needs to be installed, and the plate-shaped battery 20 will generate heat. After the connecting piece 10 is provided on the cover plate of the 1000W, it is basically impossible to install a heat dissipation device on one side of the cover plate, which is not conducive to the heat dissipation of the power battery 20, which may affect the life, performance and safety of the power battery.

Utility model content

The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, and to provide a power battery with a reasonable structure design.

The technical solution adopted by the embodiments of the present utility model to solve the above problems is: a power battery, which is characterized in that it includes:

a casing with an accommodating space inside, and at least one end of the casing is open; and

a top cover, which is covered at the opening of the casing;

The top cover includes a cover plate and a pole, wherein the pole is arranged on the cover plate, and a surface on one side of the cover plate has a first surface and a second surface, in the length direction of the casing At least a part of the part of the pole exposed to the outside of the power battery is located within the range defined by the first surface and the second surface.

In the embodiment of the present invention, in the length direction of the casing, the part of the pole exposed to the outside of the power battery is completely located within the range defined by the first surface and the second surface.

In the embodiment of the present invention, the first surface and the second surface are arranged in parallel, and the first surface and the second surface are connected by a third surface, and the pole is arranged on the third surface or on the second surface.

According to the embodiment of the present invention, the pole is disposed on the third surface, and the pole does not exceed the range defined by the two ends of the casing in the length direction of the casing.

The third surface in the embodiment of the present invention is perpendicular to the first surface.

In the embodiment of the present invention, the cover plate is made of metal material, and the cover plate is bent to form the first surface, the second surface and the third surface.

In the embodiment of the present invention, the cover plate has an embedded portion and a limiting surface, the embedded portion is embedded inside the casing, and the limiting surface is in contact with the end of the casing.

In the embodiment of the present invention, the cover plate is welded and fixed to the casing.

According to the embodiment of the present invention, the top cover has two groups, and the two groups of top covers are respectively disposed on both ends of the casing, wherein the poles of one set of the top cover constitute positive poles, and the other set of the top cover constitutes a positive pole. The pole of the cover constitutes the negative pole.

An embodiment of the present invention further provides a power battery assembly, comprising a connecting piece and a plurality of power batteries according to any one of claims 1 to 9, wherein the plurality of power batteries are arranged in one direction, and the connecting pieces are electrically connected The pole of the power battery, wherein the connecting piece does not exceed the range defined between the first surfaces of the top cover on both sides of the power battery in the length direction of the power battery, and the connecting piece In the height direction of the power battery, it does not exceed the end faces on both sides of the power battery in the height direction.

Compared with the prior art, the utility model has one or more of the following advantages or effects: the structure is simple and the design is reasonable; after the connecting piece is arranged on the power battery, the space occupied by the power battery after it is installed in the battery pack will not increase, and the space can be reduced. The utilization rate is improved, which can improve the overall energy density; in addition, for the heat dissipation of the power battery, a heat dissipation device can be installed around the casing of the power battery and on the top cover (the top cover is except the area above the second surface) to cool the power battery. Heat dissipation can increase the heat dissipation area to facilitate the heat dissipation of the power battery and increase the life and safety of the power battery; finally, a gap is formed on the second surface of the cover plate, in addition to the connecting piece, the rest of the electronic components in the battery pack are also It can be set at the gap, so as to make better use of the space.

Description of drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are just some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

FIG. 1 is a schematic structural diagram of a power battery in the prior art.

FIG. 2 is a schematic three-dimensional structure diagram of the power battery in Example 1. FIG.

FIG. 3 is a schematic view of the front structure of the top cover.

FIG. 4 is a schematic three-dimensional structure diagram of the top cover.

FIG. 5 is an enlarged view of A in FIG. 4 .

FIG. 6 is a schematic three-dimensional structure diagram of the power battery assembly in Example 2. FIG.

Detailed ways

In order to facilitate the understanding of the present utility model, the present utility model will be more fully described below with reference to the related drawings. The preferred embodiments of the present utility model are shown in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described below. Rather, these embodiments are provided so that a thorough and complete understanding of the present disclosure is provided. The directions below, such as "axial direction", "upper", "lower", etc., are for the purpose of indicating the structural positional relationship more clearly, and are not intended to limit the present invention. In the present invention, the "vertical", "horizontal" and "parallel" are defined as: including ±10% on the basis of the standard definition. For example, vertical usually refers to the included angle of 90 degrees relative to the reference line, but in the present invention, vertical refers to the situation including 80 degrees to 100 degrees.

The present utility model will be further described in detail below with reference to the accompanying drawings and the embodiments. The following embodiments are the explanations of the present utility model and the present utility model is not limited to the following embodiments.

Example 1

Referring to FIGS. 2 to 5 , the power battery of this embodiment, a power battery, is characterized in that it includes a casing 1 and a top cover 2 .

The casing 1 in this embodiment has an accommodating space inside, and at least one end of the casing 1 is open. The housing 1 can be made of aluminum or an aluminum-based alloy. The casing 1 in this embodiment can also be roughly square.

The top cover 2 in this embodiment is covered at the opening of the casing 1 .

The top cover 2 in this embodiment includes a cover plate 21 and a pole 22 , wherein the pole 22 is disposed on the cover plate 21 , and a surface on one side of the cover plate 21 has a first surface 211 and a second surface The surface 212, in the length direction of the casing 1, at least a part of the part of the pole 22 exposed to the outside of the power battery is located within the range defined by the first surface 211 and the second surface 212 .

Further, in the length direction of the casing 1 , the part of the pole 22 exposed to the outside of the power battery is completely within the range defined by the first surface 211 and the second surface 212 . In other words, the pole 22 will not occupy the extra size of the power battery. Therefore, when the power battery is installed in the battery pack, the pole 22 does not occupy extra space in the battery pack, so the space utilization rate can be improved.

In this embodiment, the first surface 211 and the second surface 212 are arranged in parallel, and the first surface 211 and the second surface 212 are connected by a third surface 213 , and the pole 22 is arranged on the on the third surface 213 or the second surface 212 .

Preferably, the pole 22 is disposed on the third surface 213 , and the pole 22 does not exceed the range defined by the two ends of the casing 1 in the length direction of the casing 1 . When the pole 22 is disposed on the third surface 213 , when the connecting piece 3 is fixed on the pole 22 , it is more favorable for the electrical connection of the connecting piece 3 to the outside.

In this embodiment, the third surface 213 is perpendicular to the first surface 211 .

In this embodiment, the cover plate 21 is made of metal material, and the cover plate 21 is bent to form the first surface 211 , the second surface 212 and the third surface 213 . When the cover plate 21 is processed, the cover plate 21 is first punched and formed, then the punched cover plate 21 is bent and formed, and is bent into a size matching the casing 1, and finally the pole 22 is fixed on the cover plate 21. Thus, the top cover 2 is formed. In this embodiment, the connection between the pole 22 and the cover plate 21 is in the prior art, and details are not described herein again.

In this embodiment, the cover plate 21 has an embedded portion 214 and a limiting surface 215 . The embedded portion 214 is embedded inside the casing 1 , and the limiting surface 215 is in contact with the end of the casing 1 . In this way, the cover plate 21 can be better matched with the casing 1 .

In this embodiment, the cover plate 21 is fixed to the casing 1 by welding. Specifically, after the insertion portion 214 of the cover plate 21 is inserted into the casing 1 , the cover plate 21 is fixed to the casing 1 by welding on the outside of the cover plate 21 .

The top cover 2 in this embodiment has two groups, and the two groups of top covers 2 are respectively disposed on both ends of the casing 1 . One group of the poles 22 of the top cover 2 constitutes a positive pole, and the other group of the poles 22 of the top cover 2 constitutes a negative pole.

Example 2

Referring to FIG. 6 , this embodiment also provides a power battery assembly, including a connecting piece 3 and the power battery in Embodiment 1, a plurality of the power batteries are arranged in one direction, and the connecting piece 3 is electrically connected to the power The pole 22 of the battery, wherein the connecting piece 3 does not exceed the range defined between the first surfaces 211 of the top cover 2 on both sides of the power battery in the length direction of the power battery. The sheet 3 does not exceed the end faces on both sides in the height direction of the power battery in the height direction of the power battery.

There are two groups of connecting pieces 3 in this embodiment, wherein one group of connecting pieces 3 is connected to the positive pole of the power battery, and the other set of connecting pieces 3 is connected to the negative pole of the power battery.

In this embodiment, after the connecting piece 3 is arranged on the power battery, the space occupied by the power battery after it is installed in the battery pack will not be increased, which can improve the space utilization rate and improve the overall energy density. In addition, for the heat dissipation of the power battery, the power battery A heat dissipation device can be provided around the casing 1 and on the top cover 2 (the top cover 2 is excluding the area above the second surface 212 ) to dissipate heat from the power battery, which can increase the heat dissipation area to facilitate the heat dissipation of the power battery and increase the power The life and safety of the battery; finally, a gap is formed on the second surface 212 of the cover plate 21. Except for the connecting piece 3, other electronic components in the battery pack can also be arranged in the gap, so as to better utilize the space. .

The above content described in this specification is only an illustration of the present invention. Those skilled in the art of the present invention can make various modifications or additions to the described specific embodiments or substitute in similar ways, as long as they do not deviate from the content of the description of the present invention or exceed the definitions in the claims The scope of the invention should belong to the protection scope of the present invention.

Claims (10)

1. A power cell, comprising:

the device comprises a shell, a handle and a handle, wherein the shell is internally provided with an accommodating space, and at least one end of the shell is arranged in an open manner; and

the top cover is arranged at the opening of the shell in a covering manner;

the top cap includes apron and utmost point post, wherein, utmost point post sets up on the apron, the surface of apron one side has first surface and second surface in the length direction of casing, utmost point post expose in at least a part of the outside of power battery is located the first surface and the scope that the second surface is injectd.

2. The power cell of claim 1, wherein: in the length direction of the shell, the part of the pole exposed out of the power battery is completely positioned in the range defined by the first surface and the second surface.

3. The power cell of claim 1 or 2, wherein: the first surface and the second surface are arranged in parallel, the first surface and the second surface are connected through a third surface, and the pole is arranged on the third surface or the second surface.

4. The power cell of claim 3, wherein: the pole is arranged on the third surface, and the pole is not beyond the range limited by the two ends of the shell in the length direction of the shell.

5. The power cell of claim 3, wherein: the third surface is perpendicular to the first surface.

6. The power cell of claim 3, wherein: the cover plate is made of metal materials, and the cover plate is bent to form the first surface, the second surface and the third surface.

7. The power cell of claim 1, wherein: the cover plate is provided with an embedding part and a limiting surface, the embedding part is embedded into the shell, and the limiting surface is abutted against the end part of the shell.

8. The power cell of claim 1 or 7, wherein: the cover plate is fixed with the shell in a welding mode.

9. The power cell of claim 1, wherein: the top cap has two sets ofly, two sets of top caps set up respectively in the both ends of casing, one of them is organized the utmost point post of top cap constitutes anodal utmost point post, and another group the utmost point post of top cap constitutes negative pole post.

10. A power battery assembly, comprising a plurality of power batteries according to any one of claims 1 to 9 and a connecting sheet, wherein the plurality of power batteries are arranged along one direction, the connecting sheet is electrically connected with poles of the power batteries, wherein the connecting sheet does not exceed the range defined between the first surfaces of the top covers on both sides of the power batteries in the length direction of the power batteries, and the connecting sheet does not exceed the end surfaces on both sides of the power batteries in the height direction of the power batteries.

Images