CN219180651U

CN219180651U - Bottom shell of battery pack, battery pack and electric equipment

Info

Publication number: CN219180651U
Application number: CN202320195254.8U
Authority: CN
Inventors: 苟江锋; 高云洁
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2023-01-28
Filing date: 2023-01-28
Publication date: 2023-06-13
Anticipated expiration: 2033-01-28

Abstract

The utility model discloses a bottom shell of a battery pack, the battery pack and electric equipment, wherein a shell of the battery pack comprises: a bottom shell body, wherein a containing cavity is formed in the bottom shell body; and the inner radiating fins are arranged on the inner surface of the bottom shell main body, the inner radiating fins and the bottom shell main body are integrally formed, and the accommodating cavity is divided into a plurality of sub accommodating cavities for accommodating the battery cells by the inner radiating fins. Through the combination of drain pan main part and interior fin, can make the battery package form the structure of heat dissipation integration, avoid electric core overheated and thermal runaway to influence adjacent electric core, promote the security and the reliability of battery.

Description

Bottom shell of battery pack, battery pack and electric equipment

Technical Field

The utility model relates to the technical field of batteries, in particular to a bottom shell of a battery pack, the battery pack and electric equipment.

Background

With the increasing prominence of the problems of energy shortage, environmental pollution and the like, new energy technologies are receiving attention. In the related art, a plurality of electric cores are installed in a battery case, and the electric cores can radiate heat through a liquid cooling plate.

However, due to the contact between the cells, when the cells generate heat, the adjacent cells generate heat to affect each other. Especially, when a certain cell is overheated or in a thermal runaway condition, the temperature of an adjacent cell contacted with the cell is increased, so that the adjacent cell is overheated and cannot work normally, and the safety is low and the reliability is poor when the battery works.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide a bottom case of a battery pack, which can prevent the adjacent cells from being affected by overheat and thermal runaway of the cells, and improve the safety and reliability of the battery.

The utility model further provides a battery pack.

The utility model further provides electric equipment.

The bottom case of the battery pack according to the present utility model includes: a bottom shell body, wherein a containing cavity is formed in the bottom shell body; and the inner radiating fins are arranged on the inner surface of the bottom shell main body, the inner radiating fins and the bottom shell main body are integrally formed, and the accommodating cavity is divided into a plurality of sub accommodating cavities for accommodating the battery cells by the inner radiating fins.

According to the bottom shell of the battery pack, through the combination of the bottom shell main body and the inner radiating fins, the battery pack can form a radiating integrated structure, the inner radiating fins can separate a plurality of battery cells, direct contact between adjacent battery cells can be avoided, the influence of overheat and thermal runaway of the battery cells on the adjacent battery cells is prevented, and the safety and reliability of the battery are improved.

In some examples of the utility model, the bottom case of the battery pack further includes: the outer radiating fin, the inner radiating fin and the bottom shell main body are integrally formed.

In some examples of the utility model, the bottom chassis body includes: the bottom plate, the said inner fin is set up on the inner surface of the said bottom plate; and the two first side plates are respectively arranged on two sides of the bottom plate in the width direction, and the outer radiating fins are arranged on the bottom plate and/or the first side plates.

In some examples of the utility model, the bottom case of the battery pack further includes: the limiting plate is arranged on the bottom plate and located at two ends of the inner radiating fin, and the limiting plate is used for limiting the battery cell along the length direction of the battery cell.

In some examples of the utility model, the outer fins are disposed on the base plate, the outer fins being perpendicular to the base plate and spaced apart in a width direction along the base plate.

In some examples of the utility model, the outer fins are disposed on the first side plate, the outer fins being perpendicular to and spaced apart on the first side plate.

In some examples of the utility model, the bottom shell body is an aluminum alloy bottom shell body.

The battery pack according to the present utility model includes: the bottom shell of the battery pack; the battery cores are correspondingly arranged in the sub-accommodating cavities; and the top cover is arranged at the top of the bottom shell.

In some examples of the utility model, the battery pack further comprises: and the battery management system is arranged on the inner surface of the top cover, and a plurality of electric cores are electrically connected with the battery management system.

In some examples of the utility model, the top cover comprises: the cover plate and the second side plates are arranged on two sides of the cover plate, and the cover plate and the two second side plates are fixedly connected with the bottom shell main body through fasteners.

In some examples of the utility model, the battery pack further comprises: the power output terminal is arranged in the bottom shell main body, the power output terminal is electrically connected with the plurality of electric cores, the external output terminal is arranged in the bottom shell main body and is partially positioned at the outer side of the bottom shell main body, and a power cable is connected between the external output terminal and the power output terminal.

The electric equipment according to the utility model comprises: the battery pack.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a first angular exploded view of a battery pack according to an embodiment of the present utility model;

fig. 2 is a schematic structural view of a bottom case of a battery pack according to an embodiment of the present utility model;

fig. 3 is a second angular exploded view of a battery pack according to an embodiment of the present utility model;

fig. 4 is a third angular exploded view of a battery pack according to an embodiment of the present utility model.

Reference numerals:

100. a battery pack;

1. a bottom case;

2. a bottom case main body; 21. a bottom plate; 22. a first side plate; 3. an outer fin; 4. an inner fin; 5. a limiting plate; 6. a battery cell; 7. a top cover; 71. a cover plate; 72. a second side plate; 8. a battery management system; 9. a power output terminal; 10. an external output terminal.

Detailed Description

Embodiments of the present utility model will be described in detail below, by way of example with reference to the accompanying drawings.

The bottom case 1 of the battery pack according to the embodiment of the present utility model, the bottom case 1 of which is applied to the battery pack 100, is described below with reference to fig. 1 to 4.

As shown in fig. 1 and 2, a bottom case 1 of a battery pack according to an embodiment of the present utility model includes: the battery pack comprises a bottom shell main body 2 and inner radiating fins 4, wherein the bottom shell main body 2 can be used for supporting and installing internal components of the battery pack, a containing cavity is formed in the bottom shell main body 2, a battery cell 6 is conveniently inserted into the bottom shell 1 of the battery pack, the inner radiating fins 4 are arranged on the inner surface of the bottom shell main body 2, namely the inner surface of the bottom shell main body 2 faces to one side surface of the battery cell 6, the inner radiating fins 4 and the bottom shell main body 2 are integrally formed, and the containing cavity is divided into a plurality of sub containing cavities for containing the battery cell 6 by the inner radiating fins 4. The inner cooling fin 4 can play a role in heat dissipation, so that the heat dissipation capacity of the battery pack 100 can be improved, and the rapid heat dissipation of the battery cell 6 is facilitated. Moreover, through with interior fin 4 and drain pan main part 2 integrated into one piece, interior fin 4 will hold the chamber and separate into a plurality of son that are used for holding electric core 6 hold the chamber, can effectively reduce the temperature rise phenomenon of electric core 6, can avoid direct contact between the adjacent electric core 6 moreover, can control the influence of thermal runaway to between the adjacent electric core 6, promote the security and the reliability of battery.

Therefore, according to the bottom case 1 of the battery pack according to the embodiment of the utility model, the battery pack 100 can form a heat dissipation integrated structure through the combination of the bottom case main body 2 and the inner radiating fins 4, and the influence of thermal runaway on the functions of the adjacent battery cells 6 caused by overheat of the battery cells 6 can be avoided, so that the safety and reliability of the battery can be improved.

As shown in fig. 1 and 2, the bottom case 1 of the battery pack 100 further includes: the outer radiating fins 3, the inner radiating fins 4 and the bottom shell main body 2 are integrally formed. The outer radiating fin 3 can also play a role in heat dissipation, so that the heat dissipation capacity of the battery pack 100 can be further improved, the quick heat dissipation of the battery cell 6 is facilitated, the heat dissipation capacity of the battery can be improved through integrally forming the outer radiating fin 3 and the bottom shell main body 2, and the safety and reliability of the battery can be further improved.

According to an alternative embodiment of the present utility model, as shown in fig. 2, the bottom chassis body 2 includes: the bottom plate 21 and two first side plates 22, the inner fin 4 is disposed on the inner surface of the bottom plate 21, the two first side plates 22 are disposed on both sides of the bottom plate 21 in the width direction, and the outer fin 3 is disposed on the bottom plate 21 and/or the first side plates 22. The bottom plate 21 and the two first side plates 22 form a semi-enclosed structure, so that the chip is conveniently inserted into the bottom case 1 of the battery pack 100, the inner heat sink 4 is positioned on the inner surface of the bottom plate 21, the two first side plates 22 are positioned in the left-right direction of the bottom plate 21, and the heat dissipation capability can be further improved by arranging the outer heat sink 3 on the bottom plate 21 and/or the first side plates 22.

In addition, as shown in fig. 1 and 2, the bottom case 1 of the battery pack 100 further includes: the limiting plate 5, limiting plate 5 sets up on bottom plate 21, and limiting plate 5 is located the both ends of interior fin 4 moreover, and limiting plate 5 is used for spacing electric core 6 along the length direction of electric core 6. Limiting plate 5 is arranged in the semi-enclosed structure formed by bottom plate 21 and first side plate 22, limiting plate 5 is connected to the inner surface of bottom plate 21 and is mutually perpendicular to inner radiating fin 4, and can be in limit fit with battery cell 6 along the length direction of battery cell 6, so that the displacement problem of battery cell 6 can be avoided, battery cell 6 can be more stable in bottom shell 1 of battery pack 100, separation can be carried out between battery cells 6, the temperature rise phenomenon of battery cell 6 can be effectively reduced, and the influence of thermal runaway on adjacent battery cells 6 can be controlled. The longitudinal direction is the front-rear direction.

Wherein, as shown in fig. 1 and 2, the outer fins 3 are provided to the bottom plate 21, and the outer fins 3 are perpendicular to the bottom plate 21 and are arranged at intervals in the width direction along the bottom plate 21. By such arrangement, the heat dissipation area of the bottom case 1 of the battery pack 100 can be increased, and thus the heat dissipation effect of the case of the battery pack 100 can be improved. The width direction is the left-right direction.

Also, as shown in fig. 1 and 2, the outer fins 3 are provided to the first side plate 22, and the outer fins 3 are perpendicular to the first side plate 22 and are spaced apart on the first side plate 22. By such arrangement, the heat dissipation area of the side surface of the case of the battery pack 100 can be increased as well, so that the heat dissipation effect of the case of the battery pack 100 can be improved.

Of course, the bottom shell body 2 is an aluminum alloy bottom shell body 2, so that the bottom shell body 2 made of the material is convenient for the outer radiating fins 3 to be integrally formed on the outer surface of the bottom shell body 2, and the inner radiating fins 4 to be integrally formed on the inner surface of the bottom shell body 2, so that the safety of the battery can be improved. The outer fin 3, the inner fin 4 and the bottom case body 2 may be integrally formed by aluminum extrusion.

As shown in fig. 1, a battery pack 100 according to an embodiment of the present utility model includes: the battery pack 100 is provided with the bottom shell 1, the battery cells 6 and the top cover 7, the battery cells 6 are correspondingly arranged in the plurality of sub-accommodating cavities, the battery cells 6 are prevented from shaking in the bottom shell 1, the temperature rise phenomenon of the battery cells 6 can be effectively reduced, the influence of thermal runaway on the adjacent battery cells 6 can be controlled, the safety and the reliability of the battery can be improved, and the top cover 7 is arranged at the top of the bottom shell, so that the battery pack 100 forms a surrounding structure.

As shown in fig. 3, the battery pack 100 further includes: and the battery management system 8, the battery management system 8 is arranged on the inner surface of the top cover 7, and the plurality of battery cells 6 are electrically connected with the battery management system 8. That is, the battery management system 8 is not exposed on the outer surface of the battery pack 100, so that the service life of the battery management system 8 can be prolonged, and the battery management system 8 is electrically connected with the plurality of battery cells 6, so that the battery cells 6 can work normally.

In addition, as shown in fig. 3 and 4, the top cover 7 includes: the cover plate 71 and the second side plates 72, the second side plates 72 are arranged on two sides of the cover plate 71, and the cover plate 71 and the two second side plates 72 are fixedly connected with the bottom shell main body 2 through fasteners. The top cover 7 and the bottom shell main body 2 can be connected through the fasteners, the cover plate 71 and the second side plate 72 can form a relatively sealed structure with the bottom shell 1 of the battery pack, the internal battery cell 6 is protected, and the service life of the battery cell 6 is prolonged.

In addition, as shown in fig. 4, the battery pack 100 further includes: the power output terminal 9 and the external output terminal 10, the power output terminal 9 is disposed in the bottom shell main body 2, the power output terminal 9 is electrically connected with the plurality of battery cells 6, the external output terminal 10 is disposed in the bottom shell main body 2, the external output terminal 10 is partially located outside the bottom shell main body 2, and a power cable is connected between the external output terminal 10 and the power output terminal 9. The power output terminal 9 is connected with the plurality of battery cells 6 in the bottom shell main body 2, so that temperature data of the battery cells 6 can be protected and monitored, a part of the external output terminal 10 is positioned on the outer side of the bottom shell main body 2, and the external output terminal 10 and the power output terminal 9 are conveniently connected with the outside through power cables.

The powered device according to the present utility model includes the battery pack 100 of the above-described embodiment. The electric equipment can be energy storage equipment, vehicles, unmanned aerial vehicles, ships and other equipment, and is not limited in specific.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the description of the utility model, a "first feature" or "second feature" may include one or more of such features. In the description of the present utility model, "plurality" means two or more. In the description of the utility model, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by another feature therebetween. In the description of the utility model, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A bottom case of a battery pack, comprising:

a bottom shell body, wherein a containing cavity is formed in the bottom shell body; a kind of electronic device with high-pressure air-conditioning system

The inner cooling fin is arranged on the inner surface of the bottom shell main body, the inner cooling fin and the bottom shell main body are integrally formed, and the accommodating cavity is divided into a plurality of sub accommodating cavities for accommodating the battery cells by the inner cooling fin.

2. The bottom case of the battery pack according to claim 1, further comprising: the outer radiating fin, the inner radiating fin and the bottom shell main body are integrally formed.

3. The bottom case of the battery pack according to claim 2, wherein the bottom case body includes:

the bottom plate, the said inner fin is set up on the inner surface of the said bottom plate; a kind of electronic device with high-pressure air-conditioning system

The two first side plates are respectively arranged on two sides of the bottom plate in the width direction, and the outer radiating fins are arranged on the bottom plate and/or the first side plates.

4. The battery pack bottom case of claim 3, further comprising:

the limiting plate is arranged on the bottom plate and located at two ends of the inner radiating fin, and the limiting plate is used for limiting the battery cell along the length direction of the battery cell.

5. The battery pack bottom case according to claim 3, wherein the outer heat sink is provided to the bottom plate, the outer heat sink being perpendicular to the bottom plate and being spaced apart in a width direction along the bottom plate.

6. The battery pack bottom shell of claim 3, wherein the outer heat sink is disposed on the first side plate, the outer heat sink being perpendicular to and spaced apart from the first side plate.

7. The bottom case of the battery pack according to claim 1, wherein the bottom case body is an aluminum alloy bottom case body.

8. A battery pack, comprising:

the bottom case of the battery pack of any one of claims 1-7;

the battery cores are correspondingly arranged in the sub-accommodating cavities; and

the top cap, the top cap set up in the top of drain pan.

9. The battery pack of claim 8, further comprising: and the battery management system is arranged on the inner surface of the top cover, and a plurality of electric cores are electrically connected with the battery management system.

10. The battery pack of claim 8, wherein the top cover comprises: the cover plate and the second side plates are arranged on two sides of the cover plate, and the cover plate and the two second side plates are fixedly connected with the bottom shell main body through fasteners.

11. The battery pack of claim 8, further comprising: the power output terminal is arranged in the bottom shell main body, the power output terminal is electrically connected with the plurality of electric cores, the external output terminal is arranged in the bottom shell main body and is partially positioned at the outer side of the bottom shell main body, and a power cable is connected between the external output terminal and the power output terminal.

12. A powered device, comprising: the battery pack of any one of claims 8-11.